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SMITHSONIAN

MISCELLANEOUS COLLECTIONS.

VOR XS VEnTL.

‘¢ EVERY MAN IS A VALUABLE MEMBER OF SOCIETY WHO BY HIS OBSERVATIONS, RESEARCHES,
AND EXPERIMENTS PROCURES KNOWLEDGE FOR MEN,’’—SMITHSON,

,

LOGE

WASHINGTON:
PUBLISHED BY THE SMITHSONIAN INSTITUTION.

PHILADELPHIA
COLLINS, PRINTER.

ADVERTISEMENT.

THE present series, entitled ‘‘Smithsonian Miscellaneous Col-
lections,” is intended to embrace all the publications issued
directly by the Smithsonian Institution in octavo form; those in
quarto constituting the “Smithsonian Contributions to Knowl-
edge.” The quarto series includes memoirs embracing the
records of extended original investigations and researches re-
sulting in what are believed to be new truths, and constituting
positive additions to the sum of human knowledge. The octavo
series is designed to contain reports on the present state of our
knowledge of particular branches of science: instructions for
collecting and digesting facts and materials for research: lists
and synopses of species of the organic and inorganic world:
museum catalogues: reports of explorations: aids to biblio-
graphical investigations, etc., generally prepared at the expressed
request of the Institution, and at its expense.

The position of a work in one or the other of the two series
will sometimes depend upon whether the required illustrations
can be presented more conveniently in the quarto or the octavo
form.

In the Smithsonian Contributions to Knowledge, as well as in
the present series, each article is separately paged and indexed,
and the actual date of its publication is that given on its special
title-page, and not that of the volume in which it is placed. In
many cases, works have been published, and largely distributed,
years before their combinations into volumes.

SPENCER F. BAIRD,
Secretary S. I.

(iii )

oF

:

Smithsonian Miscellaneous Collections,
538

ACh LenS,

METEOROLOGICAL AND PHYSICAL,

BY

ARNOLD GUYOT, P:D: LL.D:

PROFESSOR OF GEOLOGY AND PHYSICAL GEOGRAPHY, COLLEGE OF NEW JERSEY.

FOURTH EDITION,

REVISED AND ENLARGED,

Epitep sy WILLIAM LIBBEY, Jr.,

PROFESSOR OF PHYSICAL GEOGRAPHY, COLLEGE OF NEW JERSEY.

WASHINGTON:
SMITHSONIAN INSTITUTION.
1884.

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ADVERTISEMENT.

A QUARTER of a century has now elapsed since the publication of the
last (the third) edition of Dr. Guyot’s Meteorological and Physical Tables.
This forms the first of an early projected series of “Tables of Constants”
to which the Smithsonian Institution is gradually making important
contributions. None has been in more general demand than this collec-
tion, and to its improvement and extension Prot. Guyot gratuitously
devoted a large amount of time and laborious attention.

The first edition, published in 1852, comprised 212 pages. Five years
later (in 1857) a second edition was published, with careful revision by
the author; and the various series of Tables were so enlarged as to ex-
tend the work to over 600 pages. A third edition was published in
1859, with further amendments.

To this, the author, with untiring industry, has been making constant
additions; and the present issue projected by him in 1879—from various
delays occasioned by pressing professional occupations, as well as by
illness and death in his family—has been about four years in passing
through the press. The result is at last submitted in this fourth edition,
which extends to about 750 pages.

Just before completing the last few tables, the estimable and dis-
tinguished author departed this life, February 8, 1884, in the seventy-
seventh year of his age. Dr. Guyot had for thirty years been the honored
Professor of Geology and Physical Geography in Princeton College.

The completion of the work has been entrusted to his able assistant,
Prof. William Libbey, Jr., who has conscientiously and judiciously exe-
euted his duties as the final editor. In the Preface to this edition he
has indicated the character of the additions and re-arrangements adopted.

SPENCER F. BAIRD,
Secretary S. L

Wasuineton, September, 1884.

(iii )

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1,

PREFACE

ROSIE Kok Sal Be oe FON:

to PROF, JOSEPH HENRY,
Secretary of the Smithsonian Institution.
Sir, —

In compliance with your instructions, I have prepared the collection of
Meteorological Tables contained in the following pages. I have en-
deavored' to render it useful, not only to the observers engaged in the sys-
tem of Meteorological Observations now in operation under the direction
of the Smithsonian Institution, for whom it was immediately designed, but
also to any Meteorologist who may desire to compare and to work out
portions of the vast amount of Meteorological Observations already ac-
cumulated in the stores of science.

The reduction of the observations and the extensive comparisons, with-
out which Meteorology can do but little, require an amount of mechanical
labor which renders it impossible for most observers to deduce for them-
selves the results of their own observations. The difficulty is still further
increased by the diversity of the thermometrical and barometrical scales
which Meteorologists, faithful to old habits rather than to science and to
reason, choose to retain, notwithstanding the additional labor they thus
gratuitously assume to themselves. ‘To relieve the Meteorologist of a
great portion of this labor, by means of tables sufficiently extensive to
render calculations and even interpolations unnecessary, is to save his
time and his forces in favor of science itself, and thus materially contribute
to its advancement. But most of the tables useful in Meteorology being
scattered through many volumes, which are often not of easy access, this
collection will be, it is hoped, acceptable to the friends of Meteorology, |
and will supply a want very much felt in this department of the physical

sciences.

(v)

Vi PREFACE TO THE FIRST EDITION.

In the selection of the matter, | have been guided by the idea that the
tables which J sought for my own use might also be those most likely to
be wanted by others. But I wish the following to be considered as a
first collection, containing only the tables most appropriate to the present
purpose. ‘They are, therefore, arranged in different and independent series,
with distinct paging, but constituting together a frame-work into which
any tables may be readily inserted when wanted, either to make the collec-
tion more complete, or to present a choice of tables calculated from some-
what different elements, or adapted to various methods of calculation.

The measurement of heights by means of the barometer being inti
nately connected with Meteorology, it was thought not inappropriate to
admit into this collection Hypsometrical 'T'ables, destined to render this kind
of calculations more easy and more rapid, and thus to increase the taste for
a method so useful in physical geography. I have preferred the tables of
Delcros, as uniting in the greatest degree simplicity and accuracy. ‘Those
of Gauss, Bessel, and Baily may be given afterwards.

Every table contains directions for its use, when necessary; moreover,
the indication of the elements used in its calculation, and of the source
from which it has been taken. When no remark is made as to this last

point, the table has been expressly calculated for this volume.
Very respectfully,

Your obedient servant,

A, GUYOT;

Cansripce, Mass., December 15th. 1851.

PREFACE

TORE SECOND EDITION.

TomPROF, JOSEPH: TENRY,

Secretary of the Smithsonian Institution.
Sir, —

In sending to you the Meteorological Tables composing the first edition of
this volume, published in 1852, I expressed the desire that they be consid-
ered as a first collection, containing the tables most needed at the time by
the meteorological observers engaged in the system carried on under the
supervision of the Smithsonian Institution, but destined to be increased.
It was in that expectation, I remarked, that the tables had been arranged in
independent series, as a kind of framework, into which a larger number
could readily be inserted. It seemed, indeed, highly desirable to offer to
the Meteorologist and Physical Geographer, not only the tables they daily
need for working out the results of their observations, but also such a vari-
ety of tables, computed from different elements, or by different methods, or
adapted to different measures, as to enable every one to choose among them
‘ those that he most approves, and at the same time properly to compare and
to appreciate the results obtained by others.

‘Thanks to the congenial spirit with which the elevated views of the foun-
der of the Smithsonian Institution are carried out, that character of general
usefulness is not wanting in the present volume. With your agreement, the
present edition contains more than three times as much matter as the first ;
and a rapid indication of the additions will suffice to justify them, and to
show that, in selecting or calculating the new tables, the object just men-
tioned was constantly kept in view

As to the tables in the first edition, I must remark that, several of them
having been printed in my absence, the copy prepared for the printer, in
which decimals had to be left out, failed to give always the nearest value.
Though these errors are too small to have any importance whatsoever in
Meteorology, a careful revision of all the tables on. the original computations
was made, and they were corrected in the present edition The few actual
misprints which were discovered are indicated in a table of errata to the
first edition.

(vil)

Vill PREFACE TO THE SECOND EDITION.

In the Thermometrical series six small tables have been added; they were
prepared for converting into each other differential results given in degrees
of any one of the three thermometrical scales, irrespective of their zero
point.

The Hygrometrical series has been entirely reorganized. It only con-
tained five tables, all in French measures, and the Appendix. It is now
composed of twenty-seven, arranged in three divisions. In the first are
found ten tables, based on Regnault’s hygrometrical constants, both in
French and in English measures, in two corresponding sets, for the use of
the psychrometer, the dew-point instruments, and for computing the weight
of vapor in the air. The whole set in English measures, and Table V. in
French measures, have been prepared for this edition. Being based on the
best elements we now possess, they are given here for ordinary use. The
second division contains the seven most important tables published in the
Greenwich Observations, and Glaisher’s extensive Psychrometrical Table.
These tables being much used in England, and the results obtained by them
exhibiting no inconsiderable differences from those derived from the pre-
ceding ones, they are indispensable for comparing these results. The third
division, composed of ten miscellaneous tables, furnishes the means of com-
paring the different values of the force and the weight of vapor, especially
those which have frequently been used in Germany, and also of reducing
the indications of Saussure’s Hair-Hygrometer to the ordinary scale of
moisture. ‘The Appendix has remained as in the first edition, but all the
tables have been revised and corrected.

The Barometrical series, now in four divisions, has been increased from
twelve to twenty-eight tables. Excepting three small tables for capillary
action, all the new ones have been computed for this edition. The com-
parison, now so much needed, of the Russian barometer with the other
scales, appears here for the first time.

The Hypsometrical series is almost entirely new. It contained only Del-
cros’s table for barometric and Regnault’s table for thermometric measure-
ments, besides two auxiliary tables and the thirteen small tables of the
Appendix. It now offers twenty-three tables for barometrical measurement
of heights, in which all the principal formule and scales are represented ;
three for the measurement of heights by the thermometer, in French and in
English measures ; and a rich Appendix of forty-four tables, more extensive
and convenient than those in the old set, which afford the means of readily
converting into each other all the measures usually employed for indicating
altitudes.

The series of Meteorological Corrections for periodic and non-periodic
variations, for all parts of the world, mostly due to the untiring industry of
Professor Dove, is an addition which will surely be appreciated by those
who know how difficult access to the original tables is for most Meteorol-

PREFACE TO THE SECOND EDITION. 1x

ogists. A few tables have been added to Dove’s collection, computed by
Glaisher, Captain Lefroy, and by myself. Most of the tables refer to tem-
perature, only two to moisture. Two tables of Barometrical Corrections
have been placed in the Hypsometrical series, where they were needed,
until they can be joined by others to make a set in this series, which still
awaits new contributions, especially for these last two departments.

The Miscellaneous series is but begun. I have prepared a list of useful
tables, which would be no doubt welcome to the lovers of Terrestrial Physics,
and which may be published at some future occasion, if you should then
find it expedient.

The present collection being designed, not for the scientific only, but for
the observers at large, the propriety of the explicit and popular form of
the explanations which accompany the tables, and of the directions for
using them, will readily be understood.

I close by the remark, that, in every instance, the works from which the
tables were taken have been carefully noted, and due credit given to their
authors. For all the tables without author’s names, I am myself respon-
sible.

I remain, Sir,

Very respectfully, yours,

Ay GUY OR.
Princeton, N. J., December, 1857.

PREPAC

TO THE TAIR Dh Dp PawoOwNs

A new series of Hygrometrical Tables, based on Regnault’s Table of Elastic
Forces of Vapor, has been published by Mr. Glaisher, in London, 1856. As,
however, the Psychrometrical Table has not been computed from Regnault’s
formula, but by means of empirical factors, the results differ from those
contained in Table VII. B. A table containing Glaisher’s empirical fac-
tors, therefore, has been added, and will be found on page 144 B.

Table XVIII. of the Barometrical set, C, page 72, of the Second Edition,
for reducing to the freezing point the Barometers with glass or wooden
scales, copied from the Instructions of the Royal Society of London, and
which is reprinted in most of the English works on Meteorology, having
been found erroneous, a new table has been computed and substituted for
it. Asa large number of observers still use barometers with wooden scales,
it was found advisable to enable them to make the needed interpolations at
sight, by giving the corrections for every degree of the thermometer, from 0°
to 100° Fahr., and for barometric heights ranging between 26 and 31 inches.

The small Table VI. D, page 48, of the Hypsometrical Tables by the writer,
having been found useful for rapid computation of approximate results, a
larger one of the same description, which allows to make at sight every
interpolation, has been added, on page 92, as Table XIX’. The scientific
traveller, wishing to determine, when ascending a mountain, the elevation
of the physical or geological phenomena that he meets with, such as the
stations of remarkable plants, limits of zones of vegetation, — the geologist
who uses the aneroid barometer for geological sections, — the engineer who
wishes to know, on the ground, approximately, his results, — will find it con-
venient to obtain the relative heights indicated by their instrument by a
simple multiplication. The use of the table is explained page D 90.

Some of the decimals in the smaller Table VI. D, page 48, above men-
tioned, have been slightly altered in order to make both tables agree.

In set E of Meteorological Corrections, a table of corrections derived by
Professor C. Dewey from the hourly observations of Professor Snell, at
Amherst College, has been added, which will be of service especially to
the numerous observers in New England and in the neighboring States.

The errata indicated in the Second Edition, and a few unimportant ones
found since, have been corrected. No other changes have been made in
this edition.

AGU MOL:
Princeton, N. J., April, 1859.

(x)

PREFACE

TOE RE Eh OUR TH ow DELTLEON.

To PROF. SPENCER F. BAIRD,
Secretary of the Smithsonian Institution.
StR,—

I rake pleasure in transmitting herewith the completed fourth edition
of Guyot’s Smithsonian Meteorological and Physical Tables.

A new arrangement of the tables composing the third edition of this
book has allowed the insertion of quite a large number of new and
useful tables:—

Series I., containing the Thermometrical Tables, has remained un-
changed.

Series II., containing the Hygrometrical Tables, has been enlarged by
an addition to Table vir. The Psychrometrical Tables of Dr. Guyot
(pp. 108, 109) are based upon Regnault’s modification of the formula of
August ; which have been extended so as to include differences of 29°.5
in temperature between the wet and dry bulb thermometers.

Series III., containing the Barometrical Tables, has remained un-
changed. ;

Series IV., containing the Hypsometrical Tables, is now limited to the
first twenty-six tables of the same series in the former edition, and as a
new section remains unchanged.

Series V. is partly new and partly old, seventeen of the remaining
forty-four tables of the old series IV. having been retained as they were.
Of the remainder, some have been discarded as of no further value—
others have been re-caleulated from more recent data; and others are
entirely new. The series now contains three sets of tables of Geographi-
cal Measures, as follows :—

a. For containing the most important measures of length used for
indicating altitude; containing forty-nine tables.

(xi)

Xil PREFACE TO TUE FOURTH EDITION.

b. For comparing the most important Geographical Distances ; con-
taining ten tables.

Pre. Kor comparing the most important measures of Geographical Sur-
faces; containing ten tables.

Series V., containing the Meteorological Tables, now becomes Series
VI., with the same name, and remains unchanged.

Series VI., containing the Miscellaneous Tables, now becomes Series
VIL., and has been considerably modified.

Table 1., which formerly contained but about 60 names of observa-
tories, now gives the names and locations of over 150, and, in addition
to the data formerly given, the time west of Greenwich has been deemed
of sufficient importance to be placed in the table.

Tables 11., I1I., Iv., and v. remain the same as they were.

Table vi. is now a new table, giving the length of a degree of both
the meridian and of the parallel in the various geographical measures.
These have been calculated from Clarke’s formula for the spheroid of
revolution, of 1866.

Table vir. now contains tables for computing terrestrial surfaces,
which are new and are also based upon Clarke’s formula.

Table vir. is a new table, giving a comparison of the Standards
of Length, of England, France, Belgium, Prussia, Russia, India, and
Australia, made by Capt. A. R. Clarke, at the English Ordnance Survey
Office, under the direction of Col. Sir Henry James, Director of the
Ordnance Survey.

Table 1x. is a new table, giving the length of Insolation for any
latitude, and for any day of the year.

All the corrections which have been found or which have been reported,
have been made, and the book is now comparatively free from typo-
graphical errors; but it is hoped that the same kind courtesy which has
prompted the friends, who have aided to make the book more perfect,
will be continued in the future; and that all errors observed will be
reported as soon as found, so that they may be corrected at some future
time.

A general Index has been prepared for the whole Volume, which will
greatly facilitate the use of the book, while the old plan of dividing it
according to Series bas also been retained.

I wish to acknowledge in this place my great indebtedness to you;
and also to Mr. M. McNeill of the Princeton Observatory, for valuable
assistance in computation and in proof-reading.

Tam,

Yours most respectfully,
WILLIAM LIBBEY, Jr.

Princeton, N. J., July, 1884.

CONTENTS.

Tue Tables contained in this collection are divided into seven series, as follows :—

I. Thermometrical Tables, marked A.

II. Hygrometrical Tables, a B.
III. Barometrical Tables, ee ©:
IV. Hypsometrical Tables, ue iD
V. Geographical Measures, es E.
Wie Meteorological Corrections, ‘ F.

VII. Miscellaneous Tables, as G.

Each series has an independent paging running through all the tables that it
contains.

The letters A, B, C, D, E, F, G, at the bottom of each page, indicate the series,
and the figure the folio of the series to which the page belongs.

The figure at the top of the page indicates the page number referred to in the
index.

At the head of each series is found a detailed table of its contents.

( xili )

GENERAL INDEX.

(The figures refer to the page number at the top of the page.)

I. THERMOMETRICAL TABLES
Table I.

“

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ce

“
.

“

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«6

6c

II.

Il.

IV.

VI:

Vil.

Vill.

IX.

XI.

XII.

XII.

XIV.

XV

Comparison of Fahrenheit’s scale with Centigrade and Reaumur’s,
full degrees, from + 212° to — 39° : : t

Comparison of the Centigrade scale with Reaumur’s and Fahren-
heit’s, full degrees, from + 100° to + 50° Q :

Comparison of Reaumur’s scale with Fahrenheit’s and the Centi-
grade, full degrees, from + 80° to + 40° :

Conversion of degrees of Fahrenheit into Centigrade degrees, for
every tenth of a degree, from + 122° to —76°F. .

. Conversion of degrees of Fahrenheit into degrees of Reaumur, for

every tenth of a degree, from + 122° to — 38°F. . :

Conversion of Centigrade degrees into degrees of Fahrenheit, for
every tenth of a degree, from + 50° to — 54°, and from + 100°
to + 89° C : : :

Conversion of Centigrade dances into degrees of Renan for
every tenth of a degree, from + 40° to — 40° C.

Conversion of degrees of Reaumur into degrees of Fahrenheit, for
every tenth of a degree, from + 40° to — 40° R.

Conversion of degrees of Reaumur into Centigrade, degrees for every
tenth of a degree, from + 40° to — 40° R.

. Value of any number of degrees of Fahrenheit, expressed by a cor-

responding number of Centigrade degrees : : ;
Value of any number of degrees of Fahrenheit, expressed by a cor-
responding number of degrees of Reaumur : : :
Value of any number of Centigrade degrees, expressed by a cor-
responding number of degrees of Reaumur : 3
Value of any number of Centigrade degrees, eure by a cor-
responding number of degrees of Fahrenheit : 3
Value of any number of degrees of Reaumur, expressed by a cor-
responding number of Centigrade degrees 7 :
Value of any number of degrees of Reaumur, expressed by a cor-
responding number of degrees of Fahrenheit

f \
Wes,

PAGE

10

10

13

18

a9
or

o>

XVi

GENERAL INDEX.
PAGE

II. HYGROMETRICAL TABLES. : ; : : 5 : vend

Tables based on Regnault’s constants.

a. In French measures.

Table I. Elastic Force of Aqueous Vapor, by Regnanlt . ; : . 46
ut Il. Psychrometrical Tables, by Haeghens i ss ws
os III. For deducing the relative humidity from the Thdications of Dew-
point Instruments, by Haeghens . : : 3 : 6G
Ee IV. Factor “ for computing Relative Humidity : a : enter
He V. Weight of Vapor contained in a Cubic Metre of air . ; a: pio
6. In English measures.

Ks VI. Elastic Force of vapor, reduced from Regnault’s table ; - 48
VII. Psychrometrical tables, by A. Guyot s, 3 ease

«© WIII. For deducing the Relative Humidity from the aban of
Dew-point Instruments, by A. Guyot. : : Se Hew clelel
: IX. Factor *” for computing Relative Humidity : : : . 126
ce X. Weight of Vapor in a Cubic Foot of saturated air. ; - 130

Tables based on the constants used in the Greenwich observations.

cen Kcll®
XI.
eX IT
« XIV.
“« XIV’.
6“ <eVe

eos ekov abe

=

Seek Vel:

Pe Valle
be PXCLXS
BL XO

EST = KO

XO

“XXIII.

co SOY,

Elastic Force of Aqueous Vapor : ; : , ; Lod
Psychrometrical Tables, by Glaisher ; ; 140
Factors for computing the Force of Vapor from Parchvomeuncal
observations, by Apjohn’s formula 5 ¢ ; ; LG
Factors for finding the Temperature of the ae from the
Readings of the Psychrometer : : os
Factors for finding the Temperature of the Dew ee ean the
Readings of the Psychrometer ; : : . 182

Weight of Vapor contained in a Cubic Foot of ed air )) Saas
Factors for deducing the Weight of Vapor from the Indications

of Dew-point Instruments. : Lang
For comparing the Weight of a Cubic Foot of ty and of cottnted

Air : . ’ : : ; : . 5 d - 180

Miscellaneous Tables.

Elastic Force of Vapor expressed in Millimetres by August . 186
Elastic Force of Vapor expressed in Millimetres by Kaemtz . 188
Elastic Force of Vapor expressed in Millimetres by Magnus ~. 188
Elastic Force of Vapor in English Inches from the Royal So-
ciety’s Report : . : : 189
For showing the differences in the values of the minnie Hotce of
Vapor adopted by different authorities . q : . 190
Weight of Vapor in Grammes contained in a Cubic Metre of
saturated air by Pouillet e ; é 2
Weight of Vapor in Grammes eaitanda in a Cubie Méire of
air, by Kaemtz . : : . : : : : . 192

1
j
j
|
]
;

Table XXV. Force of Vapor and Relative Humidity corresponding to the
. 193
«© XXVI. For deducing the Relative Humidity from the Indications of

‘‘ X XVII. Relative Humidity corresponding to the degrees of Saussure’s

Table

GENERAL INDEX.

degrees of Saussure’s Hair Hygrometer, by Gay-Lussac
Saussure’s Hair Hygrometer, by Haeghens . : :

Hygrometer, by Kaemtz .

Comparison of Quantities of Rain Water in different measures.

IT.
Il.

IV.

N:

Wal:

. Conversion of Centimetres into English Inches

Conversion of Centimetres into French Inches and Lines
Conversion of English Inches into Centimetres :
Conversion of English Inches into French Inches and Lines
Conversion of French Inches and Lines into Centimetres
Conversion of French Inches and Lines into English Inches

III. BAROMETRICAL TABLES . : :

Table Ts

II.
TTY.
Ev
Vv.
Wile
Vil.
Vill.

ww

XI.
XII.
XT:
LY.
XV:
eV.

Comparison of the different Barometrical Scales.

Comparison of the English and the Metrical Barometers
Comparison of the English and the old French Barometers
Comparison of the Metrical and the English Barometers -
Comparison of the Metrical and the old French Barometers
Comparison of the old French and the English Barometers
Comparison of the old French and the Metrical Barometers
Comparison of the Russian and the Metrical Barometers

Comparison of the Russian and the old Freneh Barometers

Comparison of Barometrical differences.

Conversion of English Inches into Millimetres
Conversion of English Inches into French or Paris Lines
Conversion of Millimetres into English Inches
Conversion of Millimetres into French or Paris Lines
Conversion of French or Paris Lines into Millimetres
Conversion of French or Paris Lines into English Inches
Conversion of Russian Half-Lines into Millimetres .
Conversion of Russian Half-Lines into Paris Lines .

Reduction of Barometrical observations to the Vreezing Point.

VAL:
XVIII.
XIX.
XX.
XXI.

Reduction of English Barometers with Brass Seales

Reduction of the Metrical Barometer, by Delcros
Reduction of the Metrical Barometer, by Haeghens
Reduction of the old French Barometer, by Kaemtz

Xvil
PAGE

Os

. 200
eee)
ei

201

. 202
. 203

. 205

5 269
Reduction of English Barometers with Glass or Wooden Scales
a 20
. 287
. 330

276

xViil

GENERAL INDEX.

Correction of Barometrical observations for Capillary action.

PAGE

Table XXII. Correction to be applied to English Barometers for Capillary
action 3 : ; : 337
“ XXIII. Normal Height of Motsales in ie nee by Delcros . 337

« XXIV. Correction to be applied to Metrical Barometers for Capillary
action, by Delcros . : . 338

XXV. Depression of the Barometrical Colnnn fd to Capillary action
—Pouillet : ; 339

«© XXVI. Depression of the Barometrical Goluann thie to Gaeilary action
—Gehlers Worterbuch . . 399

«© XXVII. Depression of the Barometrical Column die to upline action
reduced from Deleros’ Tables 340

““ XXVIII. Depression of the Barometrical Column due to Cagiiary 1 action
—Baily 540
IV. HYPSOMETRICAL TABLES . 341

Tables based on Laplace’s Constants.

Table I. Delcros’ Tables, in Metrical measures ~ og
“ II. Guyot’s Tables, in English measures s ons
“ III. Loomis’ Tables, in English measures : . 387
ee IV. Gauss’ Tables, modified by Dippe, old ae measures = OOM
a V. Dippe’s Tables, for reducing Barometrical observations to another

Level, and for computing Heights, old French measures . 398
VI. Babinet’s Modification of Laplace’s Formula - 406
- VII. Baily’s Tables, in English measures - 407

Tables based on Bessel’s Formula.
« VIII. Plantamour’s Tables, in Metrical measures . 410
Miscellaneous Tables.

fs IX. Correction for the Hour of the Day at which the Observations

have been taken, Coefficients, by Berghaus . . 418
cs X. Correction for the Hour of the Day, old French measures . 419
4 XI. Correction to be applied to the Half-sums of the Temperatures

observed at Geneva and St. Bernard, and its Value in Metres

at all Hours and Seasons of the Year, by Plantamour . - 420
6 XII. Mean Height of the Barometer at the Level of the Sea in vari-

ous Latitudes : ; - 423
«XIII. Mean Height of the Barometer in all Tionths of the year - 424
«XIV. Mean Height of the Barometer at all hours of the day - 424
rs XV. Tropic Hours of Daily Variation at Halle - 425
es XV’. Amplitude of Daily Variations in various Latitudes - 425

Reducing the Barometer to the Level of the Sea . 426

—— Ss Se Oe

‘
}
:
:

GENERAL INDEX. xix

PAGE

Table XVI. Height, in English Feet of a column of air corresponding to a
, Tenth of an Inch inthe Barometer. : 2 ; - 427

« XVII. Height, in French Feet of a column of air corresponding to a
Paris Line in the Barometer ; ‘ i : ~ 427

*¢ XVIII. Height, in Metres of a column of air corresponding to a Milli.
metre in the Barometer ‘ ; = : ; ; - 427

-

‘ XIX. Height, in Metres of a column of air corresponding to a Milli-
metre in the Barometer at different Temperatures and Eleva-
tions . F : , : : : ; i : - 429

“ XIX’. Height, in English Feet of a column of air corresponding toa

tenth of an inch in the Barometer, at different Temperatures

and Elevations . ‘ 3 : : : . 430
ae XX. Correction to be applied to the means of the Hours of Giate:

tion to obtain the True Mean Barometrical Pressure, Phiia-

delphia : ; - - 5 5 « 45)

«© XXII. Correction to be applied to the means of the Hours of Ghee a-
tion to obtain the True Mean Barometrical Pressure, Green-

wich . 2 Pe 4 : , i : : . 4523
* XXII. For reducing Minutes into Decimals of an Hour . : . 433
* XXIII. Correction for curvature and refraction . : : é . 434

Thermometrical Measurement of Heights.

-
”

XXIV. Regnault’s Barometric Pressures corresponding to the Tempera-
ture of Boiling Water ‘ ; : : : : - 438

* XXYV. Regnault’s Barometric Pressures corresponding to the Tempera-

ture of Boiling Water, revised by Moritz, in metrical mea-
sures . . 2 : : : . : ; . 442

‘ XXVI. Regnault’s Barometric Pressures corresponding to the Tebiees:
ture of Boiling Water, revised by Moritz, in English measures 444

-
.

-

V. GEOGRAPHICAL MEASURES : ; ‘ : : . 447
a.) Comparison of the measures of Length most generally used for indicating

altitudes . a ; : . a P : : : . 449

Table I. Conversion of French Toises into Metres a . ; . 460

“ II. Conversion of French Toises into Paris Feet . : : . 460

a III. Conversion of French Toises into English Feet 7 : . 461

se IV. Conversion of French Toises into Rhine Feet : : . 461

“ V. Conversion of Metres into Toises . ‘ : ‘ 3 . 462

se VI. Conversion of Metres into Paris Feet . : . 3 - 463

Ke VII. Conversion of Metres into English Feet : : : . 466

«¢ VIII. Conversion of Metres into Rhine, or Prussian Feet 2 . 474

s IX. Conversion of Metres into Feet of Vienna 2 : . 474

” X. Conversion of Paris Feet into Toises 5 Z E ; - 475

XxX GENERAL INDEX.

PAGE

Table XI. Conversion of Paris Feet into Metres 5 H ; . 476
“< XII. Conversion of Paris Feet into English Feet 5 ; ~ AT
“ XIII. Conversion of Paris Feet into Rhine Feet 5 : + ATS
ss XIV. Conversion of Paris Feet into Feet of Vienna . : ATS
“6 XV. Conversion of English Yards into French Toises ; . 480
“ XVI. Conversion of English Yards into Metres . : s . 480
“ XVII. Conversion of English Feet into Metres. : : . 481
“ XVIII. Conversion of English Feet into Paris Feet : : . 482
6“ XIX. Conversion of English Feet into Rhine Feet : : . 483
“ XX. Conversion of English Feet into Feet of Vienna : . 484
“6 XXI. Conversion of Klafter of Vienna into Metres. : . 485
6 XXII. Conversion of Klafter of Vienna into Paris Feet ‘ . 486
es XXIII. Conversion of Klafter of Vienna into English Feet. . 486
“ XXIV. Conversion of Feet of Vienna into Metres . ; : . 487
“ XXV. Conversion of Feet of Vienna into Paris Feet . : . 488
cs XXVI. Conversion of Feet of Vienna into English Feet : . 489
“e XX VII. Conversion of Feet of Vienna into Rhine Feet . : . 490
«“ XXVIII. Conversion of Rhine Feet into French Toises . c ae ei
“ XXIX. Conversion of Rhine Feet into Metres ; : : . 491.
“ XXX. Conversion of Rhine Feet into Paris Feet . : ; ~ 492

“ XXXI. Conversion of Rhine Feet into English Feet : g «492
«| XXXII. Conversion of Rhine Feet into Feet of Vienna . B - 493
« XXXIII. Conversion of Bavarian Feet into Metres . ‘ . 493
«© XXXIV. Conversion of Old Spanish or Castilian Varas into Metres . 494
‘« XXXV. Conversion of Old Spanish Feet into Metres. f . 494
« XXXVI. Conversion of Mexican Varas into Metres : ; . 495
« XXXVII. Conversion of Mexican Feet into Metres . : : . 495
‘“XXXVIII. Conversion of Mexican Feet into English Feet . : . 495
X

« XXXIX. Conversion ot Bolivian Varas into Metres . ; 2 . 496
“ XL. Conversion of Bolivian Feet into Metres. : : 2 496
ee XLI. Conversion of Bolivian Feet into English Feet . : . 496
“ XLII. Conversion of Inches into Duodecimal Lines ; : Oe
“ XLII. Conversion of Decimals of a Toise into Feet and Inches . 497
“ XLIV. Conversion of Decimals of a Foot into Inches and Decimals 498
6 XLV. Conversion of Decimals of a Foot into Inches and Duo-

decimal Lines : 3 . 498
“ XLVI. Conversion of Inches and Disaecia Like into Decimals

of a Foot ; ; : 4 j a a98

n

‘ XLVII. Table for Comparing the most important measures sof evan 499
* XLVIII. Conversion of English Fathoms into Metres : : . 500

o

‘“ XLIX. Conversion of Metres into English Fathoms : ; . 900
6.) Comparison of the most important measures of Geographical Distances . 501

Table I. Conversion of Kilometres into Austrian Miles—Prussian Miles—
German Miles—Nautical Leagues—French Leagues—Geographi-
cal Miles—English Statute Miles—Russian Wersts . : . d05

i i i

GENERAL INDEX.

Table II. Conversion of Austrian Miles into Kilometres—Prussian Miles
—German Miles—Nautical Leagues—F rench Leagues—Geo-

graphical Miles—English Statute Miles—Russian Wersts .

as ILI. Conversion of Prussian Miles into Kilometres—Austrian Miles—
German Miles—Nautical Leagues—French Leagues—Geo-

eraphical Miles—English Statute Miles—Russian Wersts .

b 1V. Conversion of German Miles into Kilometres—Austrian Miles
—Prussian Miles — Nautical Leagues — French Leagues—

Geographical Miles—English Statute Miles—Russian Wersts

a -V. Conversion of Nautical Leagues into Kilometres—Austrian
Miles—Prussian Miles—German Miles—French Leagues—
Geographical Miles—English Statute Miles—Russian Wersts

Rs 7I. Conversion of French Leagues into Kilometres—Austrian Miles
—Prussian Miles—German Miles—Nautical Leagues—Geo-

graphical Miles—English Statute Miles—Russian Wersts .

a VII. Conversion of Geographical Miles into Kilometres—Austrian
Miles—Prussian Miles—German Miles—Nautical Leagues—

French Leagues—English Statute Miles—Russian Wersts .

‘© VIII. Conversion of English Statute Miles into Kilometres—Austrian
Miles—Prussian Miles—German Miles—Nautical Leagues—

French Leagues—Geographical Miles—Russian Wersts A
$6 tX. Conversion of Russian Wersts into Kilometres—Austrian Miles

—Prussian Miles — German Miles — Nautical Leagues—

French Leagues—Geographical Miles—English Statute Miles

“s X. Table for Comparing the most Important Itinerary Measures .
| s I yi

c.) Comparison of the most important measures of Geographical Surfaces.

‘Lable I. Conversion of Square Kilometres into Austrian Square Miles—
Prussian Square Miles—German Square Miles — Nautical

Square Leagues— French Square Leagues — Geographical

Square Miles—English Square Statute Miles—Russian Square

Wersts , ‘ : : ; : : : 3 :

“e II. Conversion of Austrian Square Miles into Square Kilometres—
Prussian Square Miles—German Square Miles—Nautical

Square Leagues— French Square Leagues — Geographical

Square Miles—English Square Statute Miles—Russian Square

Wersts : : 3 . : : : : : :

cs Il. Conversion of Prussian Square Miles into Square Kilometres—
Austrian Square Miles—German Square Miles—Nautical

Square Leagues— French Square Leagues — Geographical

Square Miles — English Square Statute Miles — Russian

Square Wersts” . : : Sele : : : :

f IV. Conversion of German Square Miles into Square Kilometres—
Austrian Square Miles—Prussian Square Miles—Nautical

Square Leagues— French Square Leagues — Geographical

Square Miles — English Square Statute Miles — Russian

Square Wersts . tok : ; , : ; : :

XxXi
PAGE

508

dll

ol4

020

023

526

029
002

000

D40

543

O46

XXil

Gables Vie

ce

ce

VI.

VI.

VII.

VIIl.

GENERAL INDEX.

Conversion of Nautical Square Leagues into Square Kilometres
—Austrian Square Miles—Prussian Square Miles—German
Square Miles—French Square Leagues—Geographical Square
Miles—English Square Statute Miles—Russian Square Wersts

Conversion of French Square Leagues into Square Kilometres
—Austrian Square Miles—Prussian Square Miles—German
Square Miles— Nautical Square Leagues — Geographical
Square Miles—English Square Statute Miles—Russian Square
Wersts : : 4 :

Conversion of Géoaraphionl Saute Miles into Square Kilo-
metres—Austrian Square Miles — Prussian Square Miles—
German Square Miles— Nautical Square Leagues—French
Square Leagues— English Square Statute Miles — Russian
Square Wersts : : :

Conversion of English Square gitar Miles into Suaae Kilo-
metres—Austrian Square Miles — Prussian Square Miles—
German Square Miles—Nautical Square Leagues — French
Square Leagues—Geographical Square Miles—Russian Square
Wersts °

. Conversion of Russian Snare Wersts into Square Kilometres

—Austrian Square Miles—Prussian Square Miles—German
Square Miles— Nautical Square Leagues— French Square
Leagues—Geographical Square Miles—English Square Statute
Miles : :

Table for comparing the most ‘riipantnat Measics of ‘Suntee

METEOROLOGICAL TABLES FOR CORRECTING SERIES
OF OBSERVATIONS FOR THE PERIODIC AND NON-
PERIODIC VARIATIONS

Table

66

Temperature.—Hourly Corrections for Periodic Variations.

NORTH AMERICA.

I. Washington, D. C. 3 .
IJ. Philadelphia, Girard College

II. oe 66 66
IV. Frankfort Arsenal, Pa.

Wa 66 66 “<

VI. Toronto, Canada West
VII. “e (73 oe
WAAL ce ce ce
Xe ce ce ce

X. Montreal, Canada East

XI. Sitka, Alaska : : ; ; : : ,

PAGE

049

Or
Or
wo

558

061
064

ee elle

Table

66

XII.
XIII.
XIV.
XV.

VE

XVI.
XVII.

XxCV TE.
XIX.
XX.

X XI.
SOE:
XXIII.

Re.
XXV.

XXVI.

eK VT:
XXVIII.
XXIX.
XXX.

XXXI.
XXXII.

XXXIII.

XXXIV.

XXXYV.
XXXVI.
XXXVII.
XXXVIITI.
XXXIX.
lie

XLI.

XLII.

XLII.
XLIV.

XLV.
XLVI.

GENERAL INDEX.

Boothia Felix, Arctic America
Lake Athabasca, ‘ “
Melville Island, ‘“ “
Hecla Cove, Spitzbergen

APPENDIX.

Amherst College, Mass.

SOUTH AMERICA.
Rio Janeiro, Brazil
66 66 ce
ASIA,

Trivandrum, India
ec oe

Madras, es

66 ce
Bombay, cs

66 66
Madras, t
Bombay, Se
Calcutta, ce

Tiflis, Georgia
Pekin, China
Nertchinsk, Siberia
ee oe
Bernaul, es
66 66

66 ce

EUROPE.

Rome, Italy .
Vee ON hye eC A
Geneva, Switzerlan

66 oe

St. Bernard, ‘

66 ce
Kremsmiinster, Austria .
Salzburg, Ae
Munich, Bavaria
Prague, Bohemia

66 ce

Plymouth, England

66 66

XXill
PAGE
088
589
089
089

090
ool

095
596
O97
598
099
600
601
601
602
603
605
604
605
606
607
608

611
612
613
615
614
614
615
616
616
617
618
619
620

XX1V GENERAL INDEX.

PAGE
Table XLVII. Brussels, Belgium ; 2 : : ‘ : Se !T
es XLVIII. ee es : : ; d : : - 622
“ XLIX. Schwerin, Germany ‘ 3 ‘ i : j s O22
“ L. Miihlhausen, Prussia . : ; 2 ‘ 4 oe
“ LI. Utrecht, Holland ‘ , Y : : : . 624
v6 LII. Greenwich, England . : : : : : - 624
‘6 LIII. “ “ 4 : ; ; , ; «625
‘6 LIV. “ cc ‘ : : : 3 d - 626
“ LV. Halle, Prussia ‘ : 3 3 , g 2 <. O20
us LVI. Gottingen, Hanover. : : 5 [ : - 628
ee LVII. Berlin, Prussia . ; ; : ‘ ; A so 29
‘s LVIII. Salzuflen, Germany : : ‘ : : t - 6380
“s LVIX. Stettin, “ : : : 3 : ; s. (Oark
ss LX. Apenrade, Sleswick : . : : : 4) smooe
ec LXI. Leith, Scotland. : é : , ; : » 1633
“s Pexeh: 27 <5 ae : ; : : i : : . 6384
ae LXIII. Makerstown, Scotland . : : : ; é - 639
ve LXIV. Dublin, Ireland . ; 3 ‘ ; 5 l - 635
ou LXV. Catherinenburg, Russia : : ‘ , i «5636
ba LXVI. ec rah : 4 : é é =) O88
ce LXVII. St. Petersburg, eee Vay : é : Y } - 3637
gs LXVIII. Helsingfors, Finland. ‘ : : : . - 638
es LXIX. St. Petersburg, Russia . : , ‘ : : - 639
“c LXX. Helsingsfors, Finland . : 4 : ; : . 640
6s LXXI. Christiania, Norway s : ; ¢ a ‘ SoeGA
LXXII. Drontheim, “ . : : 4 : : ~ 2642

66 LXXIII. Strait of Kara, Russia . : ? y ; < - 643
“3 LXXIV. Matoschkin Schar, Novaia Zemblia . ; . . O44
G LXXV. Bosekop, Norway . . 3 : : : : oy 4645
ce BX. “ ee : ‘ ; ; : ‘ ‘ - 645

AFRICA AND AUSTRALIA.

‘6 LXXVI. St. Helena . f . : j i : : . 649
‘« DLXXVII. Cape of Good Hope, Africa . ; : : d . 649

.
n

LXXVIII. Hobarton, Tasmania . : z 3 . : . 650

Monthly Corrections for Non-Periodic Variations.

6 LX XTX. Madras, India 2 , : p : 3 ‘ =o ook
& LXXX. Palermo, Sicily . : ; ; 2 ‘ ; . 655
6“ LXXXI. Milan, Italy . 5 : : : 3 é Z . 656
« DLXXXII. Geneva, Switzerland . a 5 ; 4 : - 658

‘“ DLXXXIII. Vienna, Austria . ‘ ; : : : : - 660
«. LXXXIV. Ratisbon, Austria . : ; é A : s 661

« LXXXYV. Stuttgart, South Germany . . : : 5 - 663

i i i i i th

GENERAL INDEX.

Table LXX XVI. Carlsruhe, South Germany
“* LXXXVII. Berlin, Prussia ‘
“LXXXVIII. Copenhagen, Denmark .
« DLXXXIX. Paris, France

XC. Zwanenburg, Holland
XCI. London, England . :
XCII. Kinfauns Castle, Scotland

XCIII. Tornea, Finland
XOIV. Albany, N. Y.
XCV. Salem, Mass.
XCVI. Reikiavik, Iceland

oe XCVII. Godthaab, Greenland

-
-

x

o

6

Force of Vapor and Relative Humidity.

CVIII. Greenwich, England, Force of Vapor, by Glaisher
XCIX. Greenwich, England, Relative Humidity, by Glaisher

VII. MISCELLANEOUS METEOROLOGICAL TABLES

Table I.
ee DE.

oo DTT.

SV.

av LI:
SVL E

Positions of the Principal Observatories ; P

To convert parts of the Equator in Arc into Seal Time, or
to convert Terrestrial Longitude in Are into Time

To convert Sidereal Time into parts of the Equator in Arc, or
to convert Time into Terrestrial Longitude in Arc

. For converting Sidereal Time into Mean Solar Time, and Mesa

Solar Time into Sidereal Time

. Correction of the Time obtained by observation of the on in

order to have the True Time of the Clock

Tables giving the Length of a Degree of the Meridian oad of
the Parallel .

Tables for computing Terecenial Sania es ;

Comparison of the Standards of Length of Easlantt Franke,
Belgium, Prussia, Russia, India, and Australia

. Table for giving the Length of Insolation for any given Latitude

XXV
PAGE
664
666
669
671
672
674
676
676
677
678
679
679

683
684

METEOROLOGICAL TABLES.

SERIES I.

THERMOMETRICAL TABLES,

1 ‘sigalt 2 it ' as ¢
| ee i 7 5
‘ ae ey c :
2 ; , : : ;
4 ee, on a i iS
P Ae Wie vim
ons 7
¥ ws i i
‘ f : ; i f
4 ' 7 ;
i, i ‘
Ls i ; .
‘fy -
nN! 1 v . a ¢ q
| \ er ; WS VE ie RD
, ; iy % rye SY
7 i a EK. y; 1 rh Yer a a)

yi
.
a
Vee)
i
i>
7 fA
e
Me
a
i F
ei 4
7 \
i
“ey
cata elmore Say
ey SO Mass
oe eS
R
a;
vd
i
mf

OT) MBAS raises

Tei

1G eae
‘

ak

ye we 0

TaB_e l.

66 ll

po) ELE.

Beh.

“oY,

fe VI.

ceeaW DN

VTE

Pant,

LIT.

EOXIV.

ce XV.

CONTENTS.

COMPARISON OF THE THERMOMETRICAL SCALES.
(The figures refer to the folio at the hottom of the page.)

Comparison of Fahrenheit’s Scale with the Centigrade and Reau-

mutr’s, full degrees, from +-212° to — 39°, . ; ans
Comparison of the Centigrade Scale with Reaumur’s and Fahren-
heit’s, full degrees, from +-100° to-+-50°, .. . - 10
Coniparison of Reaumur’s Scale with Fahrenheit’s ae the Centi-
grade, full degrees, from + 80° to + 40°, . ; ‘ : 10
Conversion of Degrees of Fahrenheit into Centigrade Degrees, for
every.tenth of a degree, from + 122° to—76° F., . : - 13
Conversion of Degrees of Fahrenheit into Degrees of Reaumur, for
every tenth of a degree, from +122°to—38°F., . .. - 5S

Conversion of Centigrade Degrees into Degrees of Fahrenheit, for
every tenth of a degree, from ae to ae and from +- 100°
to + 89° C : , : : : : “ : - 20
Conversion of eens Degrees into Degrees of Reaumur, for every
tenth of a degree, from + 40° to —40° C., : : : . 28
Conversion of Degrees of Reaumur into Degrees of Fahrenheit, for

every tenth of a degree, from + 40° to —40° R., : : . 30
Conversion of Degrees of Reaumur into Centigrade Degrees for every
tenth of a degree, from + 40° to — 40° R., ; : : - 32

Value of any number of Degrees of Peon expressed by a cor-
responding number of Centigrade Degrees, . i : y . 04
Value of any number of Degrees of Fahrenheit, expressed by a cor-
responding number of Degrees of Reaumur, , ; ; _ 34
Value of any number of Centigrade Degrees, expressed by a cor-
responding number of Degrees of Reaumur, 3 ; : . 34
Value of any number of Centigrade Degrees, expressed by a cor-
responding number of Degrees of Fahrenheit, . é ; mee!
Value of any number of Degrees of Reaumur, expressed by a cor-
responding number of Centigrade Degrees, . ; : . a)

‘Value of any number of Degrees of Reaumur expressed by a cor-

responding number of Degrees of Fahrenheit, . : ‘ . (30

A 3

ee seh vit: , Pest eS es Tone

*s ee, J rel eee

é : fs a, ma ae:
meer a ae abet he
pO aCenk) BE EZe es Loe sree
5 Th

MP Spx eight. "eget |

ait

oe

; eee eo ay 3 he Ae femitis

nents ye

oe Mocs, as
eee . vi Peart :
Cette ah

I awer ceon
jm tt Ay te A nt
4, 7

T= 01.

GENERAL COMPARISON

OF

THE THERMOMETRICAL SCALES,

OR

TABLES

SHOWING THE CORRESPONDING VALUES OF EACH FULL DEGREE OF FAHRENHEIT’,
CENTIGRADE, AND REAUMUR’S THERMOMETERS, FROM

+2129 TO —39° FAHRENHEIT.

. ,
.

wae

oe

is
Ss
e
-

eden adh eh anal
eee ee 0 adie ONipn 156)
5 TY AGiTD, (Sc? hehe pci ne ci : a

i whed) ieo eae: ule ofl ge ailing

pie ‘

COMPARISON OF THE THERMOMETRICAL SCALES.

Tue first three tables of this set give a simultaneous comparison of the three scales
' mostly used at present in Meteorology, and especially of the portion of the scales not
vomprised in the more extensive tables which follow them. They form thus a com-
plement to these last tables; but as most'of the temperatures contained in them do
not occur in Meteorology, the comparison of the full degrees was found sufficient.

These three tables have been taken from E. L. Schubarth’s Collection of Physical
Tables. Berlin, 1836.

Tables IV. to IX. being more useful to the Meteorologist, the calculation has been
carried out for every tenth of a degree. Tables VII. and IX. are from the Annuai?e
Météorologique de France ; the others have been calculated.

A comparison of the Centigrade and Fahrenheit degrees near the boiling point, for
every tenth of a degree, for the sake of the comparison of standard thermometers,
will be found at the end of Table VI.

Tables X. to XV. will be found useful for comparing differential results, such as
ranges of temperature, and any relative amount expressed in degrees of different

scales, without reference to their respective zeros.

-I COMPARISON OF FAHRENHEIT’S THERMOMETRICAL SCALE WITH THE

CENTIGRADE AND REAUMUR’S.

x Fahr. = (x° — 32°) § Centig. = (1° — 32°) ? Reaum.

191
199
189
188

186
185
184

182
181
180

187.

Centigrade.

+100.00
99.44
98.89
98.33
97.78
97.22
96-67
96-11
95.56
95.00
94.44
93.89)
93.33
92.78
92.22
91.67
91.11
90.56
90.00
89.44
88.89
88.33
87.78
87.22
86.67

_ 86.11
85.56
85.00
84.44
83.89
83.33
82.78
82.22
81.67
81.11
80.56
80.00
79.44
78.89
78.33

Reaumur.

+80.00
79.56
79.11
78.67
78.22
77.78
77.33
76.89
76.44
76.00
75.56
Woll
74.67
74.22
73.78
73.33
72.89
72.44
72.00
71.56
Agia
70.67
70.22
69.78
69.33
68.89
68.44
68.00
67.56
67.11
66.67
66.22
65.78
65.33
64.89
64.44
64.00
63.56
63.11
62.67

Fahren.

+172
171
170
169
168
167
166
165
164
163
162
161
160
159
158
157
156
155
154
153
152
151
150
149
148
147
146
145
144
143
142
141
140
139
138
137
136
135
154
133

Centigrade.

Reaumur.

Fahren.

Centigrade.

Reaumur.

COMPARISON OF FAHR.’S THERMOMETRICAL SCALE WITH THE CENTIG. AND REAUM 9

x° Fahr. = (2° — 32°) 3 Centig. = (2° — 32°) # Reaum.

Fahren. | Centigrade. | Reaumur. Fahren. | Centigrade. | Reaumur. Fahren. | Centigrade. Reaumur.
+33.33 | +26.67 || +48 + —15,.56 | —12.44 ||
32.78 26.22 AT —16.11 —12.89
32.22 25.78 46 —16.67 —13.33
31.67 25.33 45 =—17.22 —13.78
31.11 24.89 44 17.78 —14.22
30.56 24.44 43 —18.33 —14.67
30.00 24.00 42 —18.89 —15.11
29.44 23.56 4] —19.44 —15.56
28.89 23.11 40 —20.00 —16.00
28.33 22.67 39 —20.56 | —16.44
27.78 22.22 38 —21.11 —16.89 |
27.22 21.78 37 —21.67 —17.33
26.67 21.33 36 —22.22 -17.78 © |
26.11" 20.89 35 —22.78 —18.22 |j
25.56 20.44 54 1.11 0.89 | —23.33 —18.67 |
25.00 20.00 33 0.56 0.44 lal —23.89 —19.11
24.44 19.56 32 0.00 0.00 —12 —24.44 —19.56
23.89 19.11 31 — 0.56 — 0.44 —13 —25.00 —20.00
23.33 18.67 30 —25.56 —20.44
22.78 ° |. 18.22 29 —26.11 —20.89
22.22 17.78 28 —26.67 —21.33
21.67: 17.33 27 —27.22 —21.78
21.11 16.89 | 26 —27.78 —22.22
20.56 . 16.44 25 —28.33 —22.67
20.00 16.00 24 —28.89 +23.11
19.44 15.56 23 —29.44 —23.56
18.89 15.11 22 —30.00 | —24.00
18.33 14.67 21 —30.56 —24.44
17.78 14.22 20.
17.22 13.78 19
16.67 ‘13.33 18
16.11 12.89 17
15.56 12.44 16
15.00. 12.00 15
14.44 11.56 14
13.89 gL I SL 13
13.33 10.67 412
12.78 10.22 11
12.22 — 9.78 10
53 11.67 9.33 9
52. 11.11 8.89 8
51 10.56 8.44 4
50 10.00 8.00 6
9.44 5

For the Continuation see Table IV. and V.

10

Tl COMPARISON OF THE ‘CENTIGRADE THERMOMETER WITH REAUMUR’S
AND FAHRENHEIT’S.

x° Centig. = (32 + 2 2°) Fahr. = 3 2° Reaum.

Centig.

+100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84

Reaumur.

+80.0
79.2
78.4
“17.6
76.8
76.0
75.2
74.4
73.6
72.8
72.0
71.2
70.4
69.6
68.8
68.0
67.2

Fahrenheit.

Centig.

Reauimnue.

Fahrenheit.

Centig.

+ 66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51

50

Reaumur.

+52.8
52.0
51.2
50.4
49.6
48.8
48.0
47.2
46.4
45.6
44.8
44.0
43.2
42.4
41.6
40.8
40.0

Fahrenheit.

For the Continuation see Tables V. and VI.

UI. COMPARISON OF REAVMUR’S THERMOMETER WITH FAHRENHEIT’S

Reaumur.

+80
79
78
id
76
75
74
73
72
71
70
69
68

Fahrenheit.

+212.00
209.75
207.50
205.25
203.00
200.75
198.50
196.25
194.00
191.75
189.50
187.25
185.00
182.75

Centigrade.

+100.00
98.75
97.50
96 25
95.00
93.75
92.50
91.25
90.00
88.75
87.50
86.25
85.00
83.75

AND THE
2° Reaum. = (32° + 22°) Fahr.

Reaumur.

+66
65
64
63
62
61
60
59
58
57
56
55
54

Fahrenheit.

+180.50
178.25
176.00
173.75
171.50
169.25
167.00
164.75
162.50
160.25
158.00
155.75
153.50
151.25

CENTIGRADE.
5 x° Centig.

aes

Centigrade.

+82.50
81.25
80.00 —
78.75
77.50,
76.25
75.00
73.75
72.50
71.25
70.00
68.75
67.50
66.25

Reaumur.

+52
51
50
49
48
AT
46
45
44
43
42
41
40

For the Continuation ‘see Tables VIII. and IX.

Fahrenheit.

+149.00
146.75
144.50
142.25
140.00
137.75
135.50
133.25
131.00
128.75
126.50
124.25
122.00
119.75

10

Centigrade.

11

IV.-V.

COMPARISON

OF

PAHRENHEITS THERMOMETER
THE CENTIGRADE AND WITH THAT OF REAUMUR,

OR

TA Busnes

FOR CONVERTING THE DEGREES OF FAHRENHEIT INTO CENTIGRADE DEGREES, AND
INTO DEGREES OF REAUMUR;

GIVING THE CORRESPONDING VALUES FOR EACH TENTH OF A DEGREE, ~
FROM -+-122° TO —76° FAHRENHEIT.

IV. CONVERSION OF DEGREES OF FAHRENHEIT INTO CENTIGRADE DEGREES. 13

Tenths of Degrees.

0. i e 2. de 4. de 6. Ze 8. 9.

Centig. | Centig. . Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Ceritig.
+122 +50.00 |+50.06 |+50.11 |+-50.17 |4-50.22 ]+50.28 |+50.33 |+50.39 |+50.44 |+50.50
12} 49.44] 49.50 | 49.56| 49:61 | 49.67] 49.72 | 49.78 | 49.83 | 49.89] 49.94
120 48.89 | 49.94] 49.00 | 49.06 | 49.11} 49.17 | 49.22 | 49.28] 49.33 49.39
119 48.33 | 48.39 | 48.44] 48.50] 48.56] 48.61 | 48.67 | 48.72 | 48.78 | 48.83
118 47.78 | 47.83 | 47.89 | 47.94] 48.00] 48.06 | 48.11] 48.17] 48.22] 48.28

-117 47.22 | 47.28 | 47.33 | 47.39] 47.44] 47.50] 47.56] 47.61] 47.67] 47.72
116 46.67 | 46.72 | 46.78 | 46.83} 46.89] 46.94 | 47.00] 47.06] 47.11 | 47.17
115 46.11 | 46.17] 46.22 | 46.28 | 46.33] 46.39 | 46.44 | 46.50] 46.56] 46.61
114 45.56 | 45.61 | 45.67 | 45.72) 45.78] 45.83 | 45.89 | 45.94] 46.00] 46.06
113 45.00 | 45.06 | 45.11] 45.17 | 45.22] 45.28 | 45.33 | 45.39 45.44) 45.50

112 44.44) 44.50 | 44.56] 44.61] 44.67] 44.72 | 44.78 | 44.83] 44.89 44.94
111 43.89 | 43.94] 44.00] 44.06] 44.11] 44.17] 44.22 | 44.28 | 44.33] 44.39
110 43.33 | 43.39 |. 43.44 | 48.50] 43.56] 43.61 43.67 | 43.72 | 43.78 | 43.83
109 .|| 42.78 | 42.83] 42.89] 42.94] 43.00] 43.06 | 43.11] 43.17] 48.22] 43.28
108 42.22 | 42.28] 42.33] 42.39] 42.44] 42.50] 42.56 | 42.61] 42.67] 42.72

107 41.67 | 41.72 | 41.78 | 41.83 | 41,89 - 41.94 | 42.00 | 42.06] 42.11 | 42.17
106 41.11 | 41.17] 41.22] 41.28] 41.33] 41.39] 41.44] 41.50] 41.56] 41.61
105 40.56 | 40.61 | 40.67] 40.72 | 40.78] 40.83 | 40-89 | 40.94] 41.00] 41.06
104 40.00 | 40.06 | 40.11 | 40.17] 40.22] 40.28 | 40.33 | 40.39 | 40.44) 40.50
103 39.44 | 39.50] 39.56] 39.61] 39.67] 39.72 | 39.78 | 39.83] 39.89] 39.94

101 38.33 | 38.39 | 38.44] 38.50] 38.56] 38.61 | 38.67 | 38.72] 388.78| 38.83 ||
100 37.78 | 37.83 | 37.89 | 37.94] 38.00] 38.06 | 38.11 | 38.17] 38.22] 38.28 |
99 37.22 | 37.28 | 37.33 | 37.39 | 37.44] 37.50 | 37.56 | 37.61 | 37.67 | 37.72
98 36.67 | 36.72 | 36.78 | 36.83 | 36.89] 36.94 | 37.00 | 37.06 | 37.11 | 37.17
{
!
|

97 36.11 | 36.17 | 36.22 | 36.28] 36.33] 36.39 | 36.44 | 36.50] 36.56| 36.61
$6 35.56 | 35.61] 35.67| 35.72] 35.78] 35.83 | 35.89 | 35.94] 36.00] 36.06
95 35.00 | 35.06 | 35.11 | 35.17] 35.22] 35.28] 35.33 | 55.39 | 35.44) 35.50
94 $4.44] 34.50] 34.56| 34.61] 34.67] 34.72] 34.78 | 34.83) 34.89 | 34.94
93 33.89 | 33.94| 34.00| 34.06] 34.11] 34.17 | 34.22 | 34.28 | 34.33 | 34.39

92 $3.33 | 33.39 | 33.44] 33.50] 33.56] 33.61 | 33.67 | 33.72 | 33.78 | 33.85
91 32.78 | 32.83 | 32.89 | 32.94] 33.00] 33.06 | 33.11 | 33.17 | 33.22] 33.28 ||
90 32.22 | 32.28 | 32.33 | 32.39 | 32.44] 32.50 | 32.56 | 32.61 | 32.67 | 32.72
89 31.67 |. 31.72 | 31.78 | 31.83 | 31.89] 31.94] 32.00] 32.06 | 32.11] 33.17
88 31.11 | 31.17 | 31.22} 31.28 | 31.33 31.89 | 31.44| 31.50] 31.56] 31.61

87 30.56 | 30.61] 30.67| 30.72| 30.78] 30.83 | 30.89] 30.94] 31.00] 31.06
86 30.00 | 30.06] 30.11 | 30.17] 30.22] 30:28 | 30.33 | 30.39 | 30.44] 30.50
85 29.44 | 29.50! 29.56| 29.61 | 29.67] 29.72 | 29.78 | 29.83 | 29.89] 29.94
84 28.89 | 28.94 | 29.00] 29.06 | 29.11] 29.17 | 29.22] 29.28 | 29.33 | 29.39
83 28.33 | 28.39 | 28.44] 28.50] 28.56] 28.61 | 28.67] 28.72 | 28.78 | 28.83

0. i. 2.

102 38.89 | 38.94] 39.00] 39.06] 39.11] 39.17] 39.22 | 39.28] 39.33] 39.39

| 6. 7% 8s. 9. |

1

4 CONVERSION OF DEGREES OF FAHRENHEIT INTO CENTIGRADE DEGREES.

Degrees of

Tenths of Degrees.

Fahren- ———————
heit.
0. i. 2. De 4. de 6. Ze
oP | Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centig.
+82 +27.78 |+27.83 |+27.89 |+27.94 |+28.00 }4+28.06 |+28.11 |+28.17
81 27.22 | - 27.28 |. 27.383 | 27.39 | 27.44 9 27.50 | 927.56 | 27-61
80 26.67 | 26.72 | 26.78 | 26.83 | 26.89] 26.94 | 27.00 | 27.06
79 26.11 26.17 | 26.22) 26.28 |} 26.33] 26.39 | .26.44 | 26.50
78 25.56 | 25.61] ‘25.67 | 25.72 |: 25.78] 25.83 | 25.89 | 25.94
77 25.00 | 25.06 | 25.11 Qala 2oeea i eDe25! |e seDsaae|h P2Dsoo
76 24.44] 24.50) 24.56] 24.61 24.67] 24.72 | 24.78 | 24.83
75 23.89 | 23.94 |. 24.00 | 24.06) 24.11] 24.17] 24.22 24.28
74 23.33 | 23:39 | 23.44] 23.50) 23.56] 23.61 23.67 | 23.72
73 22.78 | 22:83 | 22.89) 22.94 | 23.00] 23:06} 23:11 | 23.17
72 22.22 | 22:28 | 22.83 | 22.39 | 22.44) 22°50 | 22:56 || 22:61
aa 21.67 | 21.72 | 21.78 | 21-53)| (21.89 } 21°94 22.00 | 22.06
70 | o¢-1 | 21.17 | 21-22 | - 212287] c21sss 21°39 ahs < | 821850
69 20.56 | 20.61 20.67 | 20.72 | 20.78} 20.83] 20.89 | 2094
68 20.00 | 20.06} 20.11 20.17 | 20.22] 20.28 | 20.33 | 20.39
67 °19.44] 19.50 | 19.56] 19.61 19.67} 19.72 19.78 19.83
66 18.89 18.94 | 19.00 19.06 | 19.11] 19.17] 19.22 19.28
65 18.33 | 18.39 | 18.44 18.50 18.56] 18.61 18.67 | 18.72
64 17.78 U7283 | vlaeoo 17.94 18.00] 18.06 | 18.11 18.17
63 229) = e28 17.33 17.39 W744) 17550 17.56 | 17.61
62 16.67 16.72 | 16.78 16.83 16.89 | 16.94 | 17.00 | 17.06
61 16.11 16.17 | 16.22 16.28 16.33 | 16.59 16.44 16.50
60 15.56 | 15.61 15.67| 15.72 15.78 } 15:83 15.89 | 15.94
59 15:00) 15.06 | ¥V5.11 15.17 15.22 | 15.28 Litas 15.39
53 14.44 14.50 14.56 |} 14.61 14.67] 14.72 14.78 14.83
o7 13.89 13.94 | 14.00 14.06 ain eae 14.28
56 13.33 | 13.39 13.44 13.50 13.56 | 13.61 13.67 | -13.72
55 12.78 | 12.83-| 12.89 12.94 | 13.00} 13.06 | 138.11 13517
54 12522 2228 12233 12.39 12.44] 12.50'| 12.56] 12:61
53 11.67] 11.72 11.78 | 11.83 | 11.89 11.94 | 12.00 12.06
52 11.11 11.17 11.22 11.287) 11233 }) 11-39) |) (11-44 11.50
51 10.56 | 10.61 10.67 10.72 | 10.78] 10.83 10.89 10.94
50 10.00 | 10.06 10.11 10.17 | 10.224. 10.28 10.33 10.39
Ad 9.44 9.50 9.56 9-61 9.67 9.72 9.78 9.83
48 8:89 | 8.94)’ 9.00 1; 9:06)).) O21 09287 | 99.229) =9228
A7 8.33 8.39 8.44 8.50 8.56 8.61 8.67 8.72
46 7.78 7.83 7.89 7.94 - 8.00 8.06 Sela Say
45 To22 7.28 7.33 7.39 744 7.50 7 56 7.61
44 6.67 6.72 6.78 6.83 6.89 6.94 7.00 7.06
43 6.11 6.17 6.22 6.28 6.33 6.39 6.44 6.50
0. 1. 2. 3. 4. od. 6. 7%
A 14

8.

Centig.
+28.22
27.67
27.11
26.56
26.00

25.44
24.89
24.33
23.78
23.22

22.67
22.11
21.56
21.00
20.44

19.89
19.33
18.78
18.22
17.67

17.11
16.56
16.00
15.44
14.89

14.33
13.78
13.22
12.67
12.11

11.56
11.00
10.44
9.89
9.33

8.78
8.22
7.67
7.11
6.56

s.

9.

Centig.
+28.28
27.72
27.17
26.61
26.06

25.50
24.94
24.39
23.83
23.28

22.72
22.17
21.61
21.06
20.50

19.94
19.39
18.83
18.28
17.72

17.17
16.61
16.06
15.50
14.94

14.39
13.83
13.28
12.72
12.17

Ween

11.06
10.50
9.94
9.39

8.83
8.28
7.72
1.17
6.61

9.

ASa)

_———— $e
(EE

CONVERSION OF DEGREES OF FAHRENHEIT INTO CENTIGRADE DEGREES. 15

Tenths of Degrees.

Degrees of
Fahren-

| heit.

}

de 4. de 6. ide ; 8. 9 ’

Centig. | Centig. | Centig. | Centig. | Centig.
+42 +5.56 | +5.61 | +5.67 | +5.72 | +5.78

Centig. | Centig. | Centig. | Centig. | Centig.

+5.83 | +5.89 | +5.94 | +6.00 | +6.06

14 —10.00 |— 9.94 |— 9.89 |— 9.83 |— 9.78 9.72 |— 9.67 |— 9.61 |— 9.56 |— 9.50
13 —10.56 |—10.50 |—10.44 |—-10.39 |—10.33 |-10.28 |—-10.22 |—10.17 |—10.11 |—10.06

41 5.00 5.06 5.11 5.17 5.22 | 5.28 5.33 5.39 5.44 5.50
40 4.44 4.50 4.56 4.61 4.67 | 4.72 4.78 4.83 | ‘4.89 4.94
39 3.89 3.94 4.00 4.06 4.11 | 4.17 4.22 4.28 4.33 4.39
38 3.33 3.39 3.44 3.50 3.56 | 3.61 3.67 3.72 3.78 3.83
37 2.78 2.83 2.89 2.94 3.00 | 3.06 3.11 3.17 3.22 3.28 |
36 2.22 2.28 2.33 2.39 2.44 | 2.50 2.56 2.61 2.67 2.72
35 1.67 1.72 1.78 1.83 1.89 |] 1.94 2.00 2.06 2.11 2.17
34 1.11 1.17 1.22 1.28 1.33 | 1.39 1.44 1.50 1.56 1.61
33 0.56 0.61 0.67 0.72 0.78 0.83 0.89 0.94 1.00 1.06
32 ‘0.00 0.06 0.11 0.17 0.22 } 0.28 0.33 0.39 0.44 0.50 |
31 — 0.56 |— 0.50 |— 0.44 |— 0.39 |— 0.33 | 0.28 |— 0.22 |— 0.17 |— 0.11 !— 0.06
30 =‘|l— 1.11 |— 1.06 |— 1.00 |— 0.94 |— 0.89 J+ 0.83 |— 0.78 |— 0.72 |— 0.67 |— 0.61
99> | 1.67 |— 1.61 |— 1.56 |— 1.50 |— 1.44 {- 1.39 |— 1.83 |- 1728. |— 1.22 |— 1.17
Dae 220 |= ot7 |e et |= 2:06 i= 2.00 I= 1.94 |= 1689) |= 1.83 |=) 1.78 = 172 |
27.~=s I=: 2.78 |— 2.72 |— 2.67 |— 2.61 |— 2.56 |- 2.50 |— 2.44 |— 2.39 |— 2.33 |— 2.28
26 ||— 3.33 |— 3.28 |— 3.22 |— 3.17 |— 3.11 |- 3.06 |— 3.00 |— 2.94 |— 2.89 |- 2.83 |i
95 |l— 3.89 |— 3.83 |— 3.78 |— 3.72 |— 3.67 |- 3.61 |— 3.56 |— 3.50 |— 3.44 |— 3.39 |
94 |l— 4.44 |— 4.39 |— 4.33 |— 4.28 |— 4.22 |— 4.17 |—. 4.11 |— 4.06 |— 4.00 |— 3.94 || ~
23. |l— 5.00 |— 4.94 |— 4.89 |— 4.83 |— 4.78 [— 4.72 |— 4.67 |— 4.61 |— 4.56 |— 4.50
22 = |l— 5.56 |— 5.50 |— 5.44 |— 5.39 |— 5.33 J- 5.28 |— 5.22 |— 5.17 |— 5.11 |— 5.06
21 — 6.11 |— 6.06 |— 6.00 |— 5.94 |— 5.89 J— 5.83 |— 5.78 |— 5.72 |— 5.67 |— 5.61
20 ~=‘||— 6.67 |— 6.61 |— 6.56 |— 6.50 |— 6.44 |— 6.39 |— 6.33 |— 6.28 |— 6.22 |— 6.17
19) N= 7.22 |= 7.17 |= 7.110 |= 7.06 |— 7.00 |— 6.94 |— 6.89 |— 6:83) |— 6.78 |— 6.72
1900 |= 778 |— 7.72 |= 7.67 |— 7.61 |= 7.56 |— 7.50) |= 7.44 |= 7.39 |= 7.33) |= 7.28
te = 8.99 |— 8.28" |— 6.22) |— 8.17 |— 8.11 = 8.06 |—'8:00' |— 7.94. |=) 7:89" |~ -7.83
16 |/— 8.89 |— 8.83 |— 8.78 |— 8.72 |— 8.67 j= 8.61 |— 8.56 |— 8.50 |— 8.44 |— 8.39
15 |— 9.44 |— 9.39 |— 9.33 |— 9.28 |— 9.22 J- 9.17 |- 9.11 |— 9.06 |— 9.00 |— 8.94
|

12 {11.11 |—11.06 |—11.00 |—10.94 |—10.89 |-10.83 |—10.78 |—10.72 |-10.67 |—10.61
i —11.67 |—11.61 |—11.56 |—11.50 |—11.44 [-11.39 |-11.33 |—11.28 |—11.22 |—11.17
10 —12.22 |—12.17 |—12.11 |-12.06 |—12.00 J-11.94 |-11.89 |—11.83 |—11.78 |—11.72
9 —12.78 |—12.72 |—12.67 |—12.61 |—12.56 }-12.50 |—12.44 |—-12.39 |—12.33 |—12.28
8 —13.33 |—13.28 |—13.22 |-13.17 |—13.11 |-13.06 |—13.00 |—12.94 |—12.89 |—12.83

13.61 |-13.56 |-13.50 |-13.44 |-13.39. ||
14.17 |-14.11 |-14.06 |-14.00 |-13.94

t —13.89 |—-13.83 |—13.78 |—-13.72 |—13.67
—14.44 |-14.39 |—14.33 |—14.28 |—14.22

—16.11 |—16.06 |—16.00 |—15.94 |—15.89 {-15.83 |—-15.78 |—15.72 |—15.67 |—15.61

3. 6. 7 8. 9.

|
|
| |
|
|
6 |
5 —15.00 |—14.94 |—14.89 |—14.83 |—14.78 |—-14.72 |-14.67 |—14.61 |—14.56 |—14.50 |
; 4 —15.56 |-15.50 |—15.44 |-15 39 |-15.33 §-15.28 |-15.22 |—15.17 |-—15.11 |—15.06 |
3 |

|

0. 1. aa de ; 4.

16 CONVERSION OF DEGREES OF FAHRENHEIT INTO CENTIGRADE DEGREES.

| Tenths of Degrees. |
Degrees of
Fahren- . Sa
heit.
0. i. 2. 3. 4. 6. 7% 8. 9.
an. Centig. | Centig. | Centig. | Centig. | Centig. Centig. | Centig Centig. | Centig.
+ 2 —16.67 |—16.61 |—16.56 |—16.5) |—16.44 —16.33 |-16.28 |—16.22 |—16.17
1 —17.22 |-17.17 |—17.11 |—17.06 |—17.00 —16.89 |—16.83 |—16.78 |--16.72
0 —17.78 |—17.72 |—17.67 |—-17.61 |—17.56 —-17.44 |-17.39 |—17.33 |—17.28
-—0 -17.78 |—-17.83 |—17.89 |—17.94 |—18.00 —18.11 |-—18.17 |—18.22 |—18.28
—1 —18.33°|—18.39 |—18.44 |—18.50 |—18.56 —18.67 |—18.72 |—18.78 |—18.83
—2 —18.89 |—18.94 |—19.00 |—19.06 |--19.11 —19.22 |-19.28 |—19.33 |—19.39
-—3 —19.44 |-19.50 |—19.56 |—19.61 |—19.67 —19.78 |—19.83 |—19.89 |—19.94
—4 —20.00 |—20.06 |—20.11 |—20.17 |—20.22 —20.33 |—20.39 '—20.44 |—20.50
—5 —20.56 |—20.61 |—20.67 |—20.72 |—20.78 —20.89 |—20.94 |—21.00 |—21.06 ©
— 6 —21.11 |—21.17 |—21.22 |—21.28 |—21.33 —21.44 |—21.50 |—21.56 |—21.61
-— 7 —21.67 |—21.72 |—-21.78 |—21.83 |—21.89 —22.00 |—22.06 |—22.11 |—22.17
-8 —22.22 |—22.28 |—22.33 |—22.39 |—22.44 —22.56 |-22.61 |-22.67 |—22.72
—9 —22.78 |—22.83 |—22.89 |—22.94 |—23.00 —23.11 |=23.17 |=23.22 |—23.28 |
—10 —23.33 |—23.39 |—23.44 |—-23.50 |—23.56 —23.67 |—23.72 |—23.78 |—23.83 |
-l11 —23.89 |—23.94 |—24.00 |-—24.06 |—24.11 —24.22 |-24.28 |-24.33 |-24.39 |
—12 —24.44 |—24.50 |-24.56 |—24.61 |—24.67 —24.78 |—24.83 |—24.89 |—24.94
—-13 —25.00 |—25.06 |—25.11 |—25.17 |—25.22 —25.33 |-25.39 |—25.44 |—25.50
—14 —25.56 |—25.61 |—25.67 —25.72 |—25.78 —25.89 |—25.94 |—26.00 |—26.06
—15 —26.11 |—26.17. |—26.22 |—26.28 |—26.33 —26.44 |—26.50 |—26.56 |—26.61
—-16 —26.67 |—26.72 |—26.78 |—26.83 |—26.89 —27.00 |—27.06 |—27.11 |—27.17

—27.56 |—27.61 |—27.67 |—27.72
—28.11 |—28.17 |—28.22 |—28.28
—28.67 |—28.72 |—28.78 |—28.83
—29.22 |—29.28 |—29.33 |—29.39

—17 = (||-27.22 |-27.28 |—27.33 |—27.39 |—27.44
—29.78 |—29.83 |—29.89 |—29.94
|

—18 ||-27.78 |-27.83 |-27.89 |-27.94 |—28.00
-19 ||-28.33 |-28.39 |-28.44 |-28.50 |-28.56
—29 ||-28,.89 |-28.94 |-29.00 |-29.06 |—29.11
—21 |/-29.44 |-29.50 |-29.56 |-29.61 |-29.67

—30.33 |-30.39 |—30.44 |—30.50
—30.89 |—30.94 |—31.00 |—31.06
—31.44 |-31.50 |—31.56 |—31.61
—32.00 |—32.06 |—32.11 |—32.17
—32.56 |—32.61 |—32.67 |—32.72

—22 |/-30.00 |-30.06 |—30.11 |—30.17 |—30.22
—23 |/-30.56 |—30.61 |—30.67 |—30.72 |—30.78
—24 ||-31.11 |-31.17 |—31.22 |-31.28 |—31.33
—25 ||-31.67 |-31.72 |—-31.78 |—31.83 |—31.89
—26 ||-32.22 |—-32.28 |—32.33 |—32.39 |—32.44

—33.11 |-33.17 |—33.22 |—33.28
—33.67 |—33.72 |—33.78 |—33.83 |
—34.22 |-34.28 |—34.33 |—34.39
—34.78 |—34.83 |—34.89 |—34.94
—35.33 |—35.39 |—35.44 |—35.50

—27 © |\-32.78 |—32.83 |—32.89 |-32.94 |—33.00
—28 ||-33.33 |-33.39 |-33.44 |-33.50 |—33.56
| —29 ||-33.89 |-33.94 |-34.00 |—34.06 |—34.11
—30 ||-34.44 |-34.50 |-34.56 |-34.61 |—34.67
| —31 —35.00 |-35.06 |—-35.11 -|—-35.17 |—35.22

—32 —35.56 |—35.61 |—35.67 |—-35.72 |—35.78
| —33 =||-36.11 |-36.17 |—36.22 |—36.28 |—36.33

—34 (||-36.67 |—36.72 |—36.78 |—36.83 |—36.89
| —35 = =||-37.22 |-37.28 |—37.33 |—37.39 |—37.44
—36 ||-37.78 |—37.83 |—37.89 |—37.94 |—38.00

—35.89 |-35.94 |-36.00 |—36.06
—36.44 |-36.50 |-36.56 |-36.61
—37.00 |-37.06 |-37.11 |-37.17 |]
—37.56 |—37.61 |—37.67 |-37.72 j
—38.11 |—38.17 |—38.22 |-38.28

6. 7 8. 9.

| ; 0. ‘I.

SONVERSION OF DEGREES OF FAHRENHEIT INTO CENTIGRADE DEGREES.

Degrees of
Fahren-
heit.

D.

Centig.
—38.33
—38.89
—39.44
—40.00

—40.56

—41.11
—41.67
—42.22
—42.78
—43.33

—43,89
—44.44
~45.00
—45.56
—46.11

—416.67
—47.22
—47.78
—48.33
—48.89

—49.44
—50.00
—50.56
—51.11
—51.67

52.22
|_59.78
53.33
—53.89
ha dd

—55.00
—55.56
56.11
—56.67
—57.22

—57.78
—58.33
—58.389
—59.44

—60.00

0.)

1. 2.
Centig. | Centig.
—38.39 |—38.44
—38.94 |—39.00
—39.50 |—-39.56
—40.06 |—40.11
—40.61 |—40.67
—41.17 |—41.22
—41.72 |—41.78
—42.28 |—42.33
—42.83 |—42.89
—43.39 |—43.44
—43.94 |—44.00.
—44.50 |—44.56
—45.06 |—45.11
—45.61 |—45.67
—46.17 |—46.22
—46.72 |—46.78
—47.28 |—47.33
—47.83 |—47.89
—48.39 |—48.44
—48.94 |—49.00
—49.50 |—49.56
—50.06 |—50.11
—50.61 |—50.67
—51.17 |—51.22
—51.72 |—51.78
—52.28 |—52.33
—52.83 |—52.89
1-53.39 |—53.44
—53.94 |—54.00
—54.50 |—54.56
—55.06 |—55.11
—55.61 |—55.67
—56.17 |—56.22
—56.72 |—56.78
—57.28 |—-57.33
—57.83 |—57.89
—58.39 |—58.44
—58.94 |—59.00
—59.50 |—59.56
—60.06 ew 1]
1. 2.

Tenths of Degrees.
3. 4.

Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centig.
—38.50 |—38.56 [-38.61 |—38.67 |—-38.72 |—38.78 |—38.83
—39.06 |—39.11 [—-39.17 |—39.22 |—39.28 |=39.33 |—39.39
—39.61 |—39.67 [-39.72 |—39.78 |—39.83 |—39.89 |—39.94
—40.17 |—40.22 [—40.28 |—40.33 |—40.39 |—40.44 |—40.50
—40.72 |—40.78 |—40.83 —40.94 |—41.00 |—41.06
—41.28 |—41.33 [-41.39 : —41.50 |—41.56 |—41.61
—41.83 |—41.89 [41.94 |—42.00 |—42.06 |—42.11 |—42.17
—42.39 |—42.44 [-42.50 |—42.56 |—42.61 |—42.67 |—42.72
—42.94 |—43.00 [-43.06 |—43.11 |—43.17 |—43.22 |—43.28
—43.50 |-43.56 [—43.61 —43.72 |—43.78 |—43.83
—44.06 |—44.11 [—44.17 : —44.28 |—44.33 |—44.39
—44.61 |—44.67 [-44.72 |—44.78 |—44.83 |—44.89 |—44.94
—45.17 |—45.22 [-45.28 |—45.33 |—45.39 |—45.44 |—45.50
—45.72 |—45.78 [-45.83 |-—45.89 |—45.94 |—46.00 |—46.06
—46.28 |—46.33 [-16.39 46. —46.50 |—46.56 |—46.61
—16.83 |—46.89 |-46.94 |—47.00 |—47.06 |—47.11 |—47.17
—47.39 |—47.44 [-47.50 |—47.56 |—47.61 |—47.67 |—47.72
—17.94 |—48.00 [-48.06 |—48.11 |—48.17 |—48.22 |—48.28
—48.50 |—48.56 [-48.61 |—48.67 |—48.72 |—48.78 |—48.83
—49.06 |—49.11 [—49.17 |—49.22 —49.28 —49.33 |—49.39
—49.61 |—49.67 [—49.72 —49.83 |—49.89 |—49.94
—50.17 |—50.22 [-50.28 |—50.33 |—50.39 |—50.44 |—50.50
—50.72 |—-50.78 [—-50.83 |—50.89 |—50.94 |—51.00 |—51.06
—51.28 |—51.33 [-51.39 |-51.44 |—51.50 |-51.56 |—51.61
—51.83 |—51.89 [-51.94 |-52.00 |—52.06 |—52.11 |—52.17
—52.39 |—52.44 [-52.50 |—52.56 |—52.61 |—52.67 |—52.72
—52.94 |—53.00 [—53.06 |—53.11 |—53.17 |—53.22 |—535.28
—53.50 |—53.56 [-53.61 |—53.67 |—53.72 |—53.78 |—53.83
—54.06 |—54.11 [-54.17 |—54.22 |—54.28 |—54.33 |—54.39
—54.61 |—54.67 [-54.72 |-54.78 |-54.83 |—54.89 |—54.94
—55.17 |—55.22 —99.44 |—55.50
—55.72 |—55.78 —56.00 |—56.06
—56.28 |—56.33 —56.56 |—56.61
—56.83 |—56.89 Fyfe | —<eyidioli a.
—57.39 |-d57.44 =O7.67 )—57.72
—57.94 |—58.00 —58.22 |—58.28
—58.50 |—58.56 —58.78 |—58.83
—59.06 |—59.11 —59.33 |—59.39
—59.61 |—59.657 —59.89 |—59.94
—60.17 |—60.22 —60.50

3. 4.

13

CONVERSION

Degrees of||.

Fahren-
heit.

+122
121
120
119
118

117
116
115
114
113

112
111
110
109
108

107
106
105
104
103

102
101
100
99
98

97
96
95
94
93

92
91
90
89
88

O. i. 2. De 4. a. 6. Ze 8.

Reaumur. |Reaumur.|Reaumur |Reaumur, | Reaumur.fReaumur. | Reaumur. | Reaumur.} Reaumur. | Reaumur.

+40.00 |+40.04 |+40.09 |+40.13 |+40.18 J+40.22 |+40.27 |+40.31 |+40.36 |+40.40
39.56 39.60 39.64 39.69 39.73 39.78 39.82 39.87 39.91 39.96
39.11 39.16 39.20 39.24 39.29 39.33 39.38 39.42. | 39.47 39.51
38.67 38.71 38.76 38.80 38.84 38.89 38.93 38.95 39.02 39.07
38.22 38.27 38.31 38.36 38.40 | 38.44 38.49 38.53 38.58 38.62
37.78 | 3782 | 37.87.| 37.91 | 37.96 | 38.00 | 38.04 | -38.09 | 38.13 | 38.18
37.33 37.38 37-42 37.47 37.51 37.56 37.60 37.64 37.69 37.73
36.89 36.93 36.98 ee 37.07 | 37.11 37.16 37.20 37.24 37.29
36.44 36.49 36.53 36.58 36.62 36.67 36.71 36.76 36.80 36.84
36.00 36.04 36.09 36.13 36.18 36.22 36.27 36.31 36.36 36.40
35.56 25.60 35.64 35.69 35.73 35.78 35.82 35.87 35.91 35.96
35.11 35.16 35.20 35.24 35.29 35.33 35.38 35.42 35.47 35.51
341.67 34.71 34.76 34.80 34.84 34.89 34.93 34.98 35.02 35.07
34.22 34.27 34.31 34.36 34.40 34.44 34.49 34.53 34.58 34.62
33.78 33.82 33.87 33.91 33.96 34.00 34.04 34.09 34.13 34.18
33.33: | 83638. || -33.42 |) 33.474) Jas.0 Hdo.50 || 9305-008 |d0204 feo sO9N |e Gouiie
32.89 32.93 32.98 33.02 33.07 33-11 33-16 33.20 33.24 33.29
32.44 32.49 32.53 32.58 32.62 32.67 32.71 32.76 32.80 32.84
32.00 32.04 32.09 32.13 32.18 32.22 SnD 32.31 32.36 32.40
31.56 31.60 31.64 31.69 31.73 31.78 31.82 31.87 31.91 31.96
31.11 31.16 31.20 31.24 31.29 31.33 31.38 31.42 31.47 31.51
30.67 30.71 30.76 30.80 30.84 7 30.89 30.93 30.98 31.02 31.07
30.22 30.27 30.31 30.36 30.40 4 30.44 30.49 30.53 30.58 30.62
29.78 | 29.82 | 29.87 | 29.91 | 29.96 | 30.00 | 30.04 | 30.09 | 30.13 | 30.18
29.33 | 29.38 | 29.42 | 29.47 | 29.51 § 29.56 | 29.60 | 29.64 | 29.69 | 29.73
28.89 | 28.93 | 28.98 | 29.02 | 29.07 | 29.11 | 29.16 | 29.20 | 29.24 | 29.29
28.44 | 28.49 | 28.53 | 28.58 | 28.62 | 28.67 | 28.71 | 28.76 | 28.80 | 28.84
28.00 28.04 28.09 28.13 28.18 | 28.22 28.27 28.31 28.36 28.40
27.56 | 27.60 | 27.64 | 27.69. | 27.73) 1 27.78) || 27.82) |" 27-87)!" 27.91" |) 27-06
ee lil 27.16 27.20 2024 27.29 27.30 27.38 27.42 27.47 27.51
26.67 | 26.71 | 26.76 | 26.80 | 26.84 | 26.89 |! 26.93 | 26.98 | 27.02 | 27.07
26.22 26.27 26.31 26.36 26.40 | 26.44 26.49 26.53 26.58 26.62
25.78 25.82 25.87 25.91 25.96 26.00 26.04 26.09 26.13 26.18
25.33 25.38 25.42 25.47 20.01 25.56 25.60 25.64 25.69 2D.78
24.89 24.93 24.98 25.02 25.07 | 25.11 25.16 25.20 25.24 25.29
24.44 24.49 2AL5S 24.58 24.62 24.67 24.71 24.76 24.80 24.84
24.00 24.04 24.09 243 24.18 24.22 24.27 24.31 24.36 24.40
23.56 | 23.60 | 23.64 | 23.69 | 23.73 | 23.78 | 23.82 | 23.87 | 23.91 | 23.96
Qa elt: 23.16 23.20 23.24 23.29 23 33 23.38 23.42 23.47 Zoe
22.67 22.71 22.76 22.80 22.84 | 22.89 22.93 22.98 23.02 23.07
22.22 Deore 22.31 22.36 22.40 | 22.44 22.49 22.53 22.58 22.62

0. i. 2. Be 4. 3. 6. Ze 8. 9.
18

Tenths of a Degree.

‘F DEGREES OF FAHRENHEIT INTO DEGREES OF REAUMUR

CONVERSION OF DEGREES OF FAHRENHEIT INTO DEGREES OF REAUMUR.

Tenths of a Degree.

Degrees of {
Fahren-
eel 0. Z a 3. 4. 5. 6. 7. | 8.
Reaumur |Reaumur.|Reaumur.| Reaumur. Reaumur.Reaumur. Reaumur. | Reaumur.|Reaumur. | Reaumur.
+81 +21.78 | +-21.82 +21.87 |+21.91 |+21.96 }+22.00 +22.04 |+22.09 |+22.13 |+22.18
80 21.33 21.38 21.42 21.47 Pilsen 21.56 21.60 21.64 21.69 21.73
79 20.89 20.93 20.98 21.02 21.07 21.11 21.16 21.20 21.24 21.29
75 20.44 20.49 20.53 20.58 20.62 | 20.67 20.71 20.76 20.80 20.84
ravi 20.00 | 20.04 | 20.09 | 20.13 | 20.18 | 20.22 20.27 | 20.31 | 20.36 | 20.40
76 19.56 | 19.60 | 19.64 | 19.69 | 19.73 19.78 | 19.82 | 19.87 | 19.91 | 19.96
| 75 19.11 19.16 19.20 19.24 | 19.29 19.33 19.38 19.42 19.47 19.51
| 7A 18.67 18.71 18.76 18.80 18 84 18.89. 18.93 18.98 19.02 19.07
| 73 18.22 18.27 18.31 18.36 18.40 # 18.44 | 18.49 18.53 18.58 18.62
72 17.78 17.82 17.87 H7-9L 17.96 } 18.00 18.04 18.09 18.13 18.18
71 17.33 | 17.38 | 17.42 | 17.47 | 17.51 | 17.56 17.60 | 17.64 17.69 | 17.73
70 16.89 | 16.93 | 16.98 17.02 17.07 § 17.11 17.16 | 17.20 17.24 | 17.29
69 16.44 16.49 16.53 16.58 16.62 } 16.67 16.71 16.76 16.80 16.84
68 16.00 16.04 16.09 16.13 16.18 | 16.22 16.27 16.31 16.36 16.40
67 15.56 | 15.60 | 15.64 | 15.69 | 15.73 | 15.78 | 15.82 | 15.87 | 15.91 | 15.96
66 15.11 | 15.16 | 15.20 | 15.24 | 15.29 1 15.33 | 15.38 | 15.42 | 15.47 | 15.51
65 14.67 14.71 14.76 14.80 14.84 || 14.89 14.93 14.98 15.02 15.07
64 14.22 14.27 14.31 14.36 14.40 14.44 14.49 14.53 14.58 14.62°
' 63 13.78 13.82 13.87 SLO 13 96 14.00 14.04 14.09 14.18 14.18
62 13.33 13.38 13.42 13.47 13.51 13.56 13.60 13.64 13.69 13.73
GL 12289 P7299) | 12-98 1 13.02) | 1s071 4) 1s. 18 13.16 | 13.20 | 13.24 | 13.29
60 12.44 12.49 12.53 12.58 12.62 12.67 12.71 12.76 12.80 12.84
59 12.00 | 12.04 | 12.09 | 12.13 | 12.18 ¥ 12.22 12.27 | 12.31 12.36 | 12.40
58 11.56 11.60 11.64 11.69 11.73 § 11.78 11.82 11.87 11.91 11.96
57 | 11.11 11.16 11.20 11.24 11.29 } 11.33 11.38 11.42 VV.47 11.51
56 10.67 | 10.71 | 10.76 | 10.80 | 10.84 } 10.89 10.93 | 10.98 | 11.02 | 11.07
55 10.22 10.27 10.31 10.36 10.40 | 10.44 10.49 10.53 10.58 10.62
54 9.78 9.82 9.87 9.91 9.96 | 10.00 10.04 10.09 10.13 10.18
53 9.33 9.38 9.42 9.47 9.51 | 9.56 9.60 9.64 9.69 9.73
52 8.89 8.93 8.98 9.02 9.07 9.11 9.16 9.20 9.24 9.29
51 8.44 8.49 8.53 8.58 8.62 |} 8.67 8.71 8.76 8.80 8.84
: 50 8.00 8.04 8.09 8.13 8.18 | 8.22 8.27 8.31 8.36. 8.40
49 7.56 7.60 7.64 7.69 113 7.78 7.82 7.87 7.91 7.96
48 7.11 7.16 7.20 7.24 729 7.33 7.38 7.42 7-A7 deol
47 6.67 | 6.71 6.76 6.80 6.84 6.89 6.93 6.98 7.02 7.07
46 || 6.22 6.27 6.31 6.36 6.40 | 6.44 6.49 6.53 6.58 6.62
L 45 | 5.78 5.82 5.87 5.91 5.96 } 6.00 6.04 6.09 6.13 6.18
44 || 533 5.38 5.42 5.47 5.51 | 5.56 5.60 5.64 5.69 5.73
| 43 4.89 4.93 4.98 5.02 5.07 belt 5.16 5.20 5.24 5.29
42 4.44 4.49 4.53 4.58 4.62 } 4.67 4.71 4.76 4.80 4.84
AD | 4.00 | 4.04 | 4.09 | 4.18 | 4.18} 4.22 | 427 | 4.31 4.36 | 4.40
| ee ae eee) Sad acl S| G0) Z| 10 Sey | oe

19

Oo) CONVERSION OF DEGREES OF FAHRENHEIT INTO DEGREES OF REAUMUR

I
in ; | Tenths of a Degree.
egrees 0

pees WEST

“|
Fahren- || - a =|
po 0. 1. 2. a. 4. 5. | 6. 7. 8.
Reaumur |Reaumur.|Reaumur.|Reaumur.|Reaumur.§ Reaumur. | Reaumur. Ee Ree Rea
+40 |/+ 3.56 |+ 3.60 |+ 3.64 |+ 3.69 |+ 3.73 J+ 3.78 |+ 3.82 |+ 3.87 |+ 3.91 |+ 3.96 |
| 39 3.11 3.16 3.20 3.24 3.29 3.33 3.38 3.42 3.47 3.51;
38 2.67 TI 2.76 2.80 2.84 2.89 2.93 2.98 3.02 3.07
37 D199 2.27 2.31 2.36 2.40 2.44 2.49 2.53 2.58 2.62
36 1.78 1.82 1.87 1.91 1.96 | 2.00 2.04 2.09 2.13 2.18
35 1.33 1.38 1.42 1.47 1.51] 1.56 1.60 1.64 1.69 1.73
34 0.89 0.93 0.98 1.02 1.07 ital 1.16 1.20 TOA 1.29
33 0.44 0.49 0.53 0.58 0.62 0.67 0.71 0.76 0.80 0.84
32 0.00 0.04 0.05 0.13 0.18 | 0.22 0.27 0.31 0.36 0.40
; $31 |-— 0.44 |— 0.40 |— 0.36 |— 0.31 |— 0.27 |— 0.22 |— 0.18 |— 0.13 |— 0.09 |— 0.04
| 30 — 0.89 |— 0.84 |— 0.80 |— 0.76 |— 0.71 j— 0.67 |— 0.62 |— 0.58 |— 0.53 |— 0.49
¥ i029 ll nes |= 1.29 |= 1.24 |= 2.20) |= 16) | 3.00) |=) 1.077 |= 1-02) |=. 0098) |. 0-98
28 |i- 1.78 |— 1.73 |— 1.69 |— 1.64 |— 1.60 J— 1.56 |— 1.51 |— 1.47 |— 1.42 |— 1.38
| 27 ||- 2.22 J— 2.18 |+ 2.13 [+ 2.09 |— 2.04 |— 2.00 |— 1.96 |- 1.91 |- 1.87 |— 1.82
26 \— 2.67 |— 2.62 |— 2.58 |— 2.53 |— 2.49 [— 2.44 |— 2.40 |— 2.36 |— 2.31 |— 2.27
| 25 ||- 3.11 |— 3.07 |— 3.02 |— 2.98 |— 2.93 [— 2.89 |— 2.84 |— 2.80 |— 2.76 |— 2.71
i| 94! 1356 |=).3:51. |=) 3.477 |= 342) |= 3:88) t= 3.88 |= 3129) |=. oted! |= 8.20) |—as1G
23 «‘|- 4.00 |— 3.96 |— 3.91 |— 3.87 |— 3.82 |— 3.78 |— 3.73 |— 3.69 |— 3.64 |— 3.60
22 |- 4.44 |— 4.40 |— 4.36 |— 4.31 |— 4.27 J— 4.22 |— 4.18 |— 4.13 |— 4.09 |— 4.04
a1 4.489. |=.4.84' |= 4.80. |= 4.96 |= 470) l= 4.67) |= 4.62) |= 4058) |= ane ea
20 |+ 5.33 |— 5.29 |— 5.24 |— 5.20 |— 5.16 [— 5.11 |— 5.07 |— 5.02 |— 4.98 |— 4.93
19 |-— 5.78 |— 5.73 |— 5.69 |— 5.64 |— 5.60 f— 5.56 |— 5.51 |— 5.47 |— 5.42 |— 5.38
18 |- 6.22 |— 6.18 |— 6.13 |— 6.09 |— 6.04 [— 6.00 |— 5.96 |— 5.91 |— 5.87 |— 5.82
17. |- 6.67 |— 6.62 |— 6.58 |— 6.53 |— 6.49 [— 6.44 |— 6.40 |— 6.36 |— 6.31 |— 6.27 }
16 | 7.11 |— 7.07 |— 7.02 |— 6.98 |— 6.93 [— 6.89 |— 6.84 |— 6.80 |— 6.76 — 6.71 |
15 |= 7.56 |— 7.51 |— 7.47 |— 7.42 |— 7.38 |— 7.33 |— 7.29 |— 7.24 |— 7.20 |— 7.16
14. | 8.00 |= 7.96 |— 7.91 |— 7.87 |= 7.82 |— 7.78 |— 7.73 |— 7.69 |— 7.64 |— 7-60
13 | 8.44 |— 8.40 |— 8.36 |— 8.31 |— 8.27 |— 8.22 |— 8.18 |— 8.13 |— 8.09 |— 8.04
12 |-~ 8.89 |— 8.84 |— 8.80 |— 8.76 |— 8.71 [— 8.67 |— 8.62 |— 8.58 |— 8.53 |— 8.49
11 |- 9.33 |— 9.29 |— 9.24 |— 9.20 |— 9.16 i— 9.11 |— 9.07 |— 9.02 |— 8.98 |— 8.93
10 |i 9.78 |— 9.73 |— 9.69 |— 9.64 |— 9.60 [— 9.56 |— 9.51 |— 9.47 |— 9.42 |— 9.38
9 |-10 22 |—10.18 |—10.13 |—10.09 |-10.04 [-10.00 |— 9.96 |— 9.91 |— 9.87 |— 9.82
8 |+-10.67 |—10.62 |—10.58 |—10.53 |-10.49 [—10.44 |—10.40 |—10.36 |—10.31 |—10.27
7 |l—11.11 |-11.07 |-11.02 |—10.98 |—10.93 [—10.89 |—10.84 |—10.80 |—10.76 |—10.71
6 |H11.56 |-11.51 |—11.47 |-11.42 |-11.38 [-11.33 |—11.29 |-11.24 |—11.20 |—11.16
5 |I-12.00 |—11.96 |—11.91. |—11.87 |—11-82 |-11.78 |-11.73 |—11.69 |—11.64 |-11.60 ||
4 ||-12.44 |-12.4b |-12.36 |—12.31 |—12.27 j-12.22, |-12.18 |—12.13 |--12.09 —12.04
3-12.89 |—12.84 |—12.80 |—12.76 |—12.71 }|—12.67 |—12.62 |—12.58 |-12.53 |—12.49
2 ee 33 |-13.29 |-13.24 j-13.20 |-13.16 [-13.11 |—13.07 |—12.02 |—12.98 |—12.93
1 |+13.78 |-13.73 |-13.69 |-13.64 |-13.60 |-13.56 |-13.51 |-13.47 |-13.42 |—13.38
+0 {-14.22 |-14.18 |-14.13 |-14.09 |—14.04 [-14.00 |—-13.96 |—13.91 |—13.87 |—13.82
| 0. 1. 2, 3. 4. | 5. 6. %. s. | 9

etl eet ta

CONVERSION OF DEGREES OF FAHRENHEIT INTO DEGREES OF REAUMUR. oi

| Degrees of
MAUCEN- || ean ap eset ee

—25.33 |—25.38

1.

.|Reaumur.

—14.27

—14.71

—15.16

—15.60

—16.04

—16.49

—17.93

—17.38

—18.82

—18.27

—18.71

—19.16

—19.56 |-19.60
—20.00 |—20.04
—20.44 |—20.49
—20.89 |—20.93
—21.35 |—21.38
—21,78 |—21.82
—22.22 |—22.27

-19 —22.67 |—22.71
—20 —23.11 |—23.16
—2 —23.56 |—23.60
—22 —24.00 |—24.04
—23 —24.44 |—24.49
—24 —24.89 |—24.93

|
i} -12
—13
-14
—15
|| -16
—17
-18

|

!

-28 |-26.67 |—26.71
—29 =||-27.11 |—27.16
—30 ||-27.56 |—27.60
—31 |I-28.00 |—28.04
—32 1-28.44 |—28.49
—33 Less —28.93
—34 |-29.33 —29.38
—35 ||-29.78 |—29.82
—36 ||-30.22 |—30.27
—37 «=||-30.67 |—30.71
—38 =| 31.11 |--31.16
-39 = =||-31.56 |—31.60
-40 |;-32.00 |—30.04

2.

Reaumur.
—14.3]
—14.76
—15.20
—15.64
—16.09

—16.53
—16.98
—17.42
—17.87
—18.31

—18.76
—19.20
—19.64
—20.09
—20.53

—20.98
—21.42
—21.87
—22.31
—22.76

—23.20
—23.64
—24.09
—24.53
—24.98

Tenths of a Degree.

de | 4.
Reaumur. Reaumur
—14.36 |—14.40 }
—14.80 |—14.84 ]
—15.24 |-15.29 |
15.69 |-15.73 |
—16.13 |—16.18 |
—16.58 |-16.62 }
—17.02 |-17.07 }
17.47 |—17.51 |
-17.91 |-17.96 |
—18.36 |—18.40 |
—18.80 |—18.84 |
—19.24 |-19.29 |
19.69 |-19.73 |
—20.13 |—20.18
—20.58 |—20.62 |
—21.02 |—21.07 |
—21.47 |-21.51 |
—21.91 |-21.96 }
—22.36 |—22.40 |
—22.80 |-22.84 }
—23.24 |—23.29
—23.69 |-23.73 |
—24.13 |—24.18 f—
—24.58 |—24.62 |
—25.02 |-25.07 |
—25.47 |-25.51
—25.91 |-25.96 |
—26.36 |-26.40 |
—26.80 |-26.84
—27.24 |-27.29
—27.69 |-27.73
—28.13 |—28.18
—28.58 |-28.62
—29.02 |—29.07
—29.47 |-29.51
—29.91 |—29.96
—30.36 |—30.40
30.80 |—30.84
31.24 |-31.29
—31.69 |-31.73
—30.13 |-30.18

be 4.

5.

6.

Reaumur.
—14.49
—14.95
—15.38
—15.82
—16.27

—16.71
—17.16
—17.60
—15.04
—18.49

—18.93
—19.38
—19.82
—20.27
—20.71

—21.16
—21.60
—22.04
—22.49
—22.93

—23.38
—23.82
—24.27
—24.71
—25.16

—25.60
—26.04
—26.49
—26.93
—27.38

—27.82
—28.27
—28.71
—29.16
—29.60

—30.04
—30.49
—30.93

/|-31.38

—31.82
—30.27

6.

7

Reaumur.

—14.53
—14.98
—15.42
—15.87
-16.31

—16.76
—17-20
—17.64
—18.09
—18.53

—18.98
—19.42
—19.87
—20.31
—20.76

—21.20
—21.64
—22.09
—22.53
—22.98

—23.42
—23.87
—24.31
—24.76
—25.20

—25.64
—26.09
—26.53
—26.98
—27.42

=27.87
—28.31
—28.76
—29 20
—29.64

—30.09
—30.53
—30-98
—31-42
—31.87
—30.31

Ze

8.

Reaumur,
—14.58
—15.02
—15.47
—15.91
—16.36

—16.80
17.24
69
—18.13
—18.58

—19.02
—19.47
19 ob
—20.36
—20.80

—21.24
—21.69
—22.13
=2:2.58
—23.02

—23.47
23.91
—24.36
—24.80
—25.24

—25.69
—26.13
—26.58
—27.02
—27.47

—27.91
—28.36
—28.80
—29.24
—29:69

—30.13
—30.58
—31.02
—31.47
—31.91
—30.36

8.

9.

Reaumur.
—14.62
—15.07
ipso
—15.96
—16.40

—16.84
ede
17.13
—18.18
—18.62

-19.07
-19.51
-19.96

|

—20.40
—20.84

—21.29
—21.73
—22.18
—22.62
—23.07

—23.51
—23.96
—24.40
—24.84
—25.29

—25.73
—26.18
—26.62
—27.07
—27.51

—27.96
—28.40
—28.84 |
eae
—29.73

—30°18
—30.62
—31.07
—31-51
—31.96
—30.40

23

VI.-VII.

COMPARISON

OF

THE CENTIGRADE THERMOMETER
THE THERMOMETERS OF FAHRENHEIT AND OF REAUMUR,

OR

TA Bea ETS

FOR CONVERTING CENTIGRADE DEGREES INTO DEGREES OF FAHRENHEIT
AND OF REAUMUR;

GIVING THE CORRESPONDING VALUES FOR EACH TENTH OF A DEGREE,
FROM -++50° TO —54° CENTIGRADE.

Oia | aie

VI. CONVERSION

OF CENTIGRADE DEGREES INTO DEGREES OF FAHRENHEIT.

25

Centigrade

Tenths of Degrees.

ee seOe | ne | ee | et | ats a
Fahren. | Fahren. | Fahren. | Fahren. | Fahren. | Fahren.
+50 +122.00)+122.18)+122.36)+122.54|+122.721+122.90
49 120.20) 120.38) 120.56) 120.74| 120.92} 121.10
48 118.40] 118.58] 118.76] 118.94] 139.124 119.30
AT 116.60} 116.78) 116.96} 117.14) 117.32] 117.50
46 114.80} 114.98] 115.16) 115.34} 115.52] 115.70
45 113.00} 113.18] 113.36) 113.54) 113.72] 113.90
44 111.20) 111.38) 111.56) 111.74] 111.92) 112.10
43 109.40| 109.58| 109.76) 109.94) 110.12} 110.30
42 107.60} 107.78) 107.96; 108.14; 108.32] 108.50
4) 105.80) 105.98} 106.16} 106.34) 106.52} 106.70
40 104.60) 104.18} 104.36} 104.54] 104.72] 104.90
39 102.20} 102.38] 102.56) 102.74) 102.92] 103.10
} 38 100.40} 100.58} 100.76) 100.94; 101.12} 101.30
37 98.60} 98.78 98.96; 99.14 99.32] 99.50
| 36 96.80} 96.98] 97.16} 97.34 97.52] 97.70
}
35 95.00} 95.18} 95.36) 95.54) 95.72] 95.90
| 34 93.20; 93.38] 93.56] 93.74; 93.92] 94.19
33 91.40} 91.58 91.76, 91.94) 92.12] 92.30
32 89.60}; 89.78} 89.96) 90.14) 90.32] 90.50
31 87.80| 87.98] 88.16] 88.34) 88.52] 88.70
30 86.00} 86.18) 86.36} 86.54! 86.72] 86.90
29 84.20) 84.38) 84.56) 84.74) 84.92] 85.10
28 82.40| 82.58) 82.76) 82.94) 83.12] 83.30
27 80.60} 80.78 80.96} 81.14} 81.32] 81.50
26 78.80}. 78.98 79.16) 79.34 79.52) ‘79.70
| 25 77.00! ‘77.18 dro ee ded nai ha | redcOO
24 Wie20|eiaee 75.56| 75.74) 75.92] ‘76.10
23 73.40| 73.58 73-40) | 73.94) 74120-74530
22 71.60| 71.78 71.96) 72.14) 72.32] 72.50
24 69.80) 69.98 70.16 70.34) 70.52] 70.70
20 68.00} 68.15} 68.36} 68.54] 68.72} 68.90
19 66.20] 66.38 66.56; 66.74) 66.92] 67.10
18 64.40) 64.58 64.76} 64.94 65.12} 65.30
17 62.60) 62.78] 62.96 63.14 63.32] 63.50
16 60.80} 60.98} 61.16 61.34] 61.52] 61.70
{
15 59.00) 59.18 59.36 59.54) 59.72} 59.90
14 Dea eos 57.56 57.74 57.92] 58.10
13 59.40) 55.58] 55.76) 55.94 56.12} 56.30
12 53.60] 53.78 53.96| 54.14) 54.32] 54.50
| WW 51.80] 51.98] 52.16] 52.34] 52.52) 52.70
| id awe | eee eateae | 2a? | See
A 25

6. % 8.
Fahren. | Fahren. | Fahren.
+123.08|/+123.26|+123.44
121.28] 121.46} 121.64
119.48} 119.66} 119.84
117.68] 117.86} 118.04
115.88] 116.06) 116.24
114.08} 114.26) 114.44
112.28) 112.46] 112.64
110.48) 110.66} 110.84
108.68} 108.86] 109.04
106.88] 107.06} 107.24
105.08] 105.26) 105.44
103.28] 103.46] 103.64
101.48] 101.66] 101.84
99.68] 99.86} 100.04
97.88); 98.06} 98.24
96.08] 96.26 96.44
94.28 94.46} 94.64
92.48 92.66| 92.84
90.68 50.86| 91.04
88.88] 89.06] 89.24
87.08] 87.26] 87.44
85.28 85.46| 85.64
83.48| 83.66] 83.84
81.68) 81.86] 82.04
79.88] 80.06} 80.24
78.08 78.26| 78.44
76.28 76.46; 76.64
74.48 74.66| 74.84
72.68| 72.86) 73.04
70.88| 71.06 71.24
69.08) 69.26 69.44
67.28| 67.46) 67.64
65.48} 65.66) 65.84
63.68| 63.86) 64.04
61.88} 62.06) 62.24
60.08} 60.26) 60.44
58.28| 58.46) 58.64
56.48| 56.66) 56.84
54.68] 54.86} 55.04
52.88) 53.06} 53.24

6. W. 8.

53.42

9.

Fahren.
+123.62
121.82
120.02
118.22
116.42

114.62
112.82
111.02
109.22
107.42

105.62
103.82
102.02
100.22

98.42;

I

96.62
94.82
93.02
91.22
89.42
87.62
85.82
84.02
82.22
80.42

78.62
76.82
75.02
73.22
71.42

69.62
67.82
66.02
64.22
62.42)

60.62
58.82
57.02
55.22

?

|
i

26 CONVERSION OF CENTIGRADE DEGREES INTO DEGREES OF FAHRENHEIT.

Tenths of Degrees.

Centigrade
Degrees.

0. 1. P45 Be 4. De 6. Ge 8. 9.

Fahren. | Fahren’ | Fahren. | Fahren. | Fahren. | Fahren. | Fahren. | Fahren. | Fahren. | Fahren.

+10 +50.00 |+50.18 |+50.36 |+50.54 |+50.72 [+50.90 |+51.08 |+51.26 |+51.44 |+51.62

9 48.20 | 48.38 | 48.56 | 48.74 | 48.92 | 49.10 | 49.28 | 49.46 | 49.64 | 49.82
8 46.40 | 46.58 | 46.76 | 46.94 | 47.12 | 47.30 | 47.48 | 47.66 | 47.84 | 48.02
7 44.60 | 44.78 | 44.96 | 45.14 | 45.32 | 45.50 | 45.68 | 45.86 | 46.04 | 46.22
6 42.80 | 42.98 | 48.16 | 43.34 | 43.52 | 43.70 | 43.88 | 44.06 | 44.24 | 44.42
5 41.00 | 41.18 | 41.36 | 41.54 | 41.72 }| 41.90 | 42.08 | 42.26 | 42.44 | 42.62
4 39.20 | 39.38 | 39.56 | 39.74 | 39.92 | 40.10 | 40.28 | 40.46 | 40.64 | 40.82
3 37.40 | 37.58 | 37.76 | 37.94 | 38.12 | 38.30 | 38.48 | 38.66 | 38.84 | 39.02
2 35.60 | 35.78 | 35.96 | 36.14 | 36.32 | 36.50 | 36.68 | 36.86 | 37.04 | 37.22
1 33.80 | 33.98 | 34.16 | 34.34 | 34.52 | 34.70 | 34.88 | 35.06 | 35.24 | 35.42
0 32.00 | 32.18 | 32.36 | 32.54 | 32.72 | 32.90 | 33.08 | 33.26 | 33.44 | 33.62
-0 32.00 | 31.82 | 31.64 | 31.46 | 31.28 | 31.10 | 30.92 | 30.74 | 30.56 | 30.38
=—1 30.20 | 30.02 | 29.84 | 29.66 | 29.48 }| 29.30 | 29.12 | 28.94 | 28.76 | 28.58
— 2 28.40 | 28.22 | 28.04 | 27.86 | 27.68 }| 27.50 | 27.32 | 27.14 | 26.96 | 26.78
—3 26.60 | 26.42 | 26.24 | 26.06 | 25.88 | 25.70 | 25.52 | 25.34 | 25.16 | 24.98
—4 24.80 | 24.62 | 24.44 | 24.26 | 24.08 | 23.90 | 23.72 | 23.54 | 23.36 | 23.18
— 5 23.00 | 22.82 | 22.64 | 22.46 | 22.28 | 22.10 | 21.92 | 21.74 | 21.56 | 21.38
—6 21.20 | 21.02 | 20.84 | 20.66 | 20.48 | 20.30 | 20.12 | 19.94 | 19.76 | 19.58
—7 19.40 | 19.22 | 19.04 | 18.86 | 18.68 | 18.50 | 18.32 | 18.14 | 17.96 | 17.78
- 8 17.60 | 17.42 | 17.24 | 17.06 | 16.88 | 16.70 | 16.52 | 16.34 | 16.16 | 15.98
-—9 15.80 | 15.62 | 15.44 | 15.26 | 15.08 | 14.90 | 14.72 | 14.54 | 14.36 | 14.18
—10 14.00 } 13.82 | 13.64 | 13.46 | 13.28 | 13.10 | 12.92 | 12.74 | 12.56 | 12.38
—I1 12.20 | 12.02 | 11.84 | 11.66 | 11.48 | 11.30 | 11.12 | 10.94 | 10.76 | 10.58
—12 10.40 | 10.22 | 10.04 9.86 9.68 9.50 9.32 9.14 8.96 8.78
—13 8.60 8.42 8.24 8.06 7.88 7.70 7.52 7.34 7.16 6.98
—14 6.80 6.62 6.44 6.26 6.08 5.90 5.72 5.54 5.36 5.18
—15 5.00 4.82 4.64 4.46 4.28 4.10 3.92 3.74 3.56 3.38
—16 3.20 3-02 2.84 2.66 2.48 2.30 2.12 1.94 1.76 1.58
hi 1.40 1.22 1.04 0.86 0.68 0.50 0.32 0.14 |— 0.04 |— 0.22
—-18- |l— 0.40 |= 0.58 |— 0.76 |— 0.94 |— 1.12 J— 1.30 |— 1.48 |— 1.66 |— 1.84 |— 2.02
-19 ||— 2.20 |— 2.38 |— 2.56 |— 2.74 |— 2.92 [— 3.10 |— 3.28 |— 3.46 |— 3.64 |— 3.82
—20 |i— 4.00 |— 4.18 |— 4.36 |— 4.54 |— 4.72 F- 4.90 |— 5.08 |— 5.26 |— 5.44 |— 5.62
—21 — 5.80 |— 5.98 |— 6.16 |— 6.34 |— 6.52 [- 6.70 |— 6.88 |— 7.06 |— 7.24 |— 7.42
—22 |lI— 7.60 |— 7.78 |— 7.96 |— 8.14 |— 8.32 J— 8.50 |— 8.68 |— 8.86 |— 9.04 |— 9.22
—23 ||— 9.40 |— 9.58 |— 9.76 |— 9.94 |—-10.12 [-10.30 |—10.48 |—10.66 |—10.84 |—11.02
; 724 = |j-11.20 |-11.38 |-11.56 |—11.74 |—11.92 —12.10 |—12.28 |—12.46 |—12.64 |—12.82
—25 = ||-13.00 |-13.18 |—13.36 |—13.54 |—13.72 [-13.90 |-14.08 |—14.26 |—14.44 |—14.62
—26 |/-14.80 |-14.98 |—15.16 |—15.34 |—15.52 [-15.70 |-15.88 |—16.06 |—16.24 |—16.42
—27 ||-16.60 |-16.78 |—16.96 |-17.14 |—17.32 |-17.50 |-17.68 |—17.86 |—18.04 |—18.22
| —28 ||-18.40 |-18.58 |—18.76 |—18.94 |—19.12 [-19.30 |—19.48 |—19.66 |—19.84 |—20.02
| —29 ||-20.20 |—20.38 |—20.56 |—20.74 |—20.92 [—21.10 |—21.28 |—21.46 |—21.64 |—21.82
[ || O. I. 2. 9.

CONVERSION OF CENTIGRADE DEGREES INTO DEGREES OF FAHRENHEIT.

Centigrade
Degrees.

Centigrade
Degrees.

100
99
98
97

Fahren.

11 195.80

27

Tenths of Degrees. |
0. 1. Be 4. de 6. Zo 8. 9.

Fahren. | Fahren. Fahren. | Fahren. }] Fahren. | Fahren. | Fahren. | Fahren. | Fahren.
—22.00 | —22.18 —22.54 | —22.72 | —22.90 | —23.08 | —23.26 | —23.44 | —23.62
—23.80 | —23.98 —24.34 | —24.52 | —24.70 | —24.88 | —25.06 | —25.24 | —25.42
—25.60 | —25.78 —26.14 | —26.32 | —26.50 | —26.68 | —26.56 | —27.04 | —27.22
—27.40 | —27.58 —27.94 | —28.12 | —28.30 | —28.48 | —28.66 | —28.84 | —29.02
—29.20 | —29.38 —29.74 | —29.92 | —30.10 | —30.28 | —30.46 | —30.64 | —30.82
—31.00 | —31.18 —31.54 | —31.72 | —31.90 | —32.08 | —32.26 | —32.44 | —32.62
—32.80 | —32.98 —33.34 | —33.52 | —33.70 | —33.88 | —34.06 | —34.24 | —34.42
—34.60 | —34.78 —35.14 | —35.32 | —35-50 | —35.68 | —35.86 | —36.04 | —36.22 |
—36.40 | —36.58 —36.94 | —37.12 | —37.30 | —37.48 | —37.66 | —37.84 | —38.02
—38.20 | —38.38 —38.74 | —38.92 | —39.10 | —39.28 | —39.46 | —39.64 | —39.82
—40.00 | —40.18 —40.54 | —40.72 | —40.90 | —41.08 | —41.26 | —41.44 | —41.62
—41.80 | —41.98 —42.34 | —42.52 | —42.70 | —42.88 | —43.06 | —43.24 | —43.42
—43.60 | —43.78 —44.14 | —44.32 | —44.50 | —44.68 | —44.86 | —45.04 | —45.22
—45.40 | —45.58 —45.94 | —46.12 | —46.30 | —46.48 | —46.66 | —46.84 | —47.02
—47.20 | —47.38 —47.74 | --47.92 | —48.10 | —48.28 | —48.46 | —48.64 | —48.82
—49.00 | —49.18 —49.54 | —49.72 | —49.90 | —50.08 | —50.26 | —50.44 | —50.62
—50.80 | —50.98 —51.34 | —51.52 | —51.70 | —51.88 | —52.06 | —52.24 | —52.42
—52.60 | —52.78 —53.14 | —53.32 ] —53.50 | —53.68 |. —53.86 | —54.04 ,; —54.22 |
—54.40 | —54.58 —54.94 | —55.12 | —55.30 | —55.48 | —55.66 | —55.84 | —56.02 |;
—56.20 | —56.38 —56.74 | —56.92 } —57.10 | —57.28 | —57.46 | —57.64 | —57.82
—58.00 | —58.18 —58.54 | —58.72 | —58.90 | —59.08 | —59.26 | —59.44 | —59.62
—59.80 | —59.98 —60.34 | —60.52 | —60.70 | —60.88 | —61.06 | —61.24 | —61.42
—61.60 | —61.78 —62.14 | —62.32 | —62.50 | —62.68 | —62.86 | —63.04 | —63.22 |
—63.40 | —63.58 —63.94 | —64.12 | —64.30 | —64.48 | —64.06 | —64.84
—65.20 | —65.38 —6§5.74 | —65.92 | —66.10 | —66.28 | —66.46 | —66.64

THE BOILING POINT.

0. 1. 2. De

Fabren.
212.54
210.74
208.94
207.14
205.34
203.54

Fahren.
212.36
210.56
208.76
206.96
205.16
203.36

212.00
210.20
208.40
206.60
204.80
203.00

212.18
210.38
208.58
206.78
204.98

201.74
199.94
198.14
196.34
194.54

201.20
199.40
197.60

201.56
199.76
197.96
196.16
194.36
192.56

199.58
197.78
195.98
194.18
192.38

194.00
192.20 |

192.74 | 192.92

Fahren.
212.72
210.92
209.12
207:32
205.52
203.72

201.92
200.12
198.32
196.52
194.72

de

Fahren.

212.90
211.10
209.30
207.50
205 70
203.90

202.10
200.30
198.50
196.70
194.90
193.10

6.

Fahren.
213.08
211.28
209.48
207.68
205.88
204.08

202.28
200.48
198.68
196.88
195.08

193.28 |

Ze

Fahren.
213.26
211.46
209.66
207.86
206.06
204.26

202.46
200 66
198.86
197.06
195.26
193.46

TABLE FOR COMPARING THE CENTIGRADE AND FAHRENHEIT’S THERMOMETERS NEAR

8.

Fahren.
213.44
211.64
209.84
208.04
206.24
204.44

202 64
200.84
199.04
197.24
195.44
193.64

27

9.

Fahren.
213.62
211.82
210.02
208.22
206.42 |
204.62

202.82 ||
201.02
199.22
197.42
195.62
193.82

CONVERSION OF CENTIGRADE DEGREES INTO DEGREES OF REAUMUR.

28

enths of Degrees.

1.

Reaum
+32.08
31.28
30.48
29.68
28.88

28.08
27.28
26.48
25.68
24.88

24.08
23.28
22,48
21.68
20.88

20.08
19.28
18.48
17.68
16.88

16.08
15.28
14.48
13.68
12.88

12.08
11.28
10.48
9.68
8.88

8.08
7.28
6.48
5.68
4.88

4.08
3.28
2.48
1.68
0.88

Oo
0.08

1.

2.

Reaum.

+32.16
31.36
30.56
29.76
28.96

28.16
27.36
26.56
25.76
24.96

24.16
23.36
22.56
21.76
20.96

20.16
19.36
18.56
17.76
16.96

16.16
15.36
14.56
13.76
12.96

12.16
11.36
10.56
9.76
8.96

8.16
7.36
6.56
5.76
4.96

4.16
3.36
2.56
1.76
0.96

°
0.16

2.

3. 4.
Reaum. | Reaum.
BD 24 (32232
31.44 31.52
30.64 30.72
29.84 29.92
29.04 29.12
28.24 28.32
27.44 27.52
26.64 26.72
25.84 25.92
25.04 | 25.12
24.24 25.32
23.44 23.52
22.64 22.72
21.84 | 21.92
21.04 21.12
20.24 20.32
19.44 19.52
18.64 18.72
17.84 17.92
17.04 iel2
16.24 16.32
15.44 15.52
14.64 14.72
13.84 13.92
13.04 13.12
12.24 12.32
11.44 11.52
10.64 10.72
9.84 9.92
9.04 9.12
8.24 8.32
7-44 TeD2
6.64 6.72
5.84 5.92
5.04 | ° 5.12
4.24 4.32
3.44 3.52
2.64 2.72
1.84 1.92
1.04 12

° °
0.24 0.32

Be 4.

de 6.
Reaum. | Reaum.
+32.40 |+32.48
31.60 | 31.68
30.80 | 30.88
30.00 30.08
29.20 29.28
28.40 | 28.48
27.60 | 27.68
26.80 | 26.88
26.00 | 26.08
25.20) || 25:28
24.40 24.48
23.60 23.68
22.80 | 22.88
22.00 22.08
21.20 | 21.28
20.40 | 20.48
19.60 19.68
18.80 18.88
18.00 18.08
17.20 17.28
16.40 16.48
15.60 15.68
14.80 14.88
14.00 | 14.08
13.20 13.28
12.40 12.48
11.60 11.68
10.80 | 10.88
10.00 10.08
9.20 9.28
8.40 8.48
7.60 7.68
6.80 6.88
6.00 6.08
5.20 5.28
4.40 4.48
3.60 3.68
2.80 2.88
2.00 2.08
1.20 1.28

° °
0.40 0.48

5d. 6.

We

+32.56
31.76
30.96
30.16
29.36

28.56
27.76
26.96
26.16
25.36

24.56
23.76
22.96
22.16
21.36

20.56
19.76
18.96
18.16
17.36

16.56
15.76
14.96
14.16
13.36

12.56
11.76
10.96
10.16

9.36

8.56
7.76
6.96
6.16
5.36

4.56
3.76
2.96
2.16
1.36

Oo
0.56

7

Reaum.

8.

Reaum.

+32.64
31.84
31.04
30.24
29.44

28.64
27.84
27.04
26.24
25.44

24.64
23.84
23.04
22.24
21.44

20.64
19.84
19.04
18.24
17.44

16.64
15.84
15.04
14.24
13.44

12.64
11.84
11.04
10.24

9.44

8.64
7.84
7.04
6.24
5.44

4.64

3.84 |

3.04
2.24
1.44

O°
0.64

&.

VII.
Centigrade
Degrees. 0.
| panes = 5 Tea
+40 +32.00
39 31.20
38 30.40
37 29.60
36 28.80
35 28.00
34 27.20
33 26.40
+ 32 25.60
31 24.80
30 24.00
29 23.20
28 22.40
27 21.60
26 20.80
25 20.00
24 19.20
23 18.40
22 17.60
21 16.80
20 16.00
19 15.20
18 14.40
| 17 13.60
Hoe 26 12.80
15 12.00
14 11.20
13 10.40
12 9.60
il 8.80
10 8.00
| 9 7.20
8 6.40
a, 5.60
6 4.80
5 4.00
| 4 3.20
3 2.40
| 2 1.60
| 1 0.80
2 °
0 0.00
| 0.
A

ae

9.

Reaum.
aS Dee
31.92
31.12
30.32
29.52

28.72
27.92
27.12
26.32
25.52

24.72
23.92
23.12
22.32
21.52
20.72
19.92
19.12
18.32
17.52
16.72
15.92
15.12

14.32
13.52

12.72
11.92
11.12
10.32
9.52

8.72
7.92
7.12
6.32
5.52

4.72
Deo
3.12
2.32
1.52

°
0.72

9.

29

VIIL.-IX.

COMPARISON

OF

REAUMUR’S THERMOMETER

WITH

THE THERMOMETER OF FAHRENHEIT AND THE
CENTIGRADE THERMOMETER,

OR

Ay Blinks

FOR CONVERTING DEGREES OF REAUMUR INTO DEGREES OF FAHRENHEIT
AND INTO CENTIGRADE DEGREES ;

GIVING THE CORRESPONDING VALUES FOR EACH TENTH OF A DEGREE,
FROM -+40° TO —40° REAUMUR.

30

VIII. CONVERSION OF DEGREES OF REAUMUR INTO DEGREES OF FAHRENHEIT.

Tenths of Degrees.

Degrees of
STOUT Ig, he. tL eead| Bee Aaa, Weed ee.) ve | eeamenoe
Fahren. | Fahren. | Fahren. | Fahren. | Fahren. } Fahren. | Fahren. | Fahren. | Fahren. | Fahren.
| 440 +122.00|+122.22/+122.45|+122.67|+122.90]+123.12/+123.35/+123.57/+123.80/+124.02
39 119.75| 119.97] 120.20) 120.42] 120.65] 120.87} 121.10] 121.32] 121.55) 121.77
38 117.50] 117.72) 117.95) 118.17] 118.40] 118.62} 118.85} 119.07] 119.30) 119.52
37 | 115.25] 115.47) 115.70] 115.92} 116.15} 116.37; 116.60) 116.82} 117.05) 117.27
36 113.00} 113.22] 113.45} 113.67] 113.90] 114.12] 114.35} 114.57; 114.80} 115.02
ay 110.75} 110.97) 111.20} 111.42) 111.65] 111.87) 112.10) 112.32} 112.55) 112.77
108.50} 108.72) 108.95) 109.17) 109.40} 109.62} 109.85} 110.07} 110.30) 110.52
33 106.25} 106.47) 106.70) 106.92] 107.15] 107.37] 107.60} 107.82) 108.05) 108.27
32 104.00} 104.22) 104.45) 104.67] 104.90] 105.12} 105.35} 105.57} 105.80] 106.02
31 101.75| 101.97] 102.20} 102.42} 102.65] 102.87} 103.10} 103.32) 103.55] 103.77
30 99.50| 99.72 99.95| 100.17) 100.40} 100.62) 100.85) 101.07; 101.30} 101.52
29 97.25) 3:97.47 97.70} 97.92 98.15] 98.37 98.60 98.82 99.05 99.27
28 95.00} 95.22 95.45 95.67 95.901 96.12 96.35 96.57 96.80) 97.02
27 92.75 92.97] - 93.20} 93.42] 93.65] 93.87 94.19) 94.32 94.55 94.77
| 26 90.50! 90.72 90:95!" 91.17 91.40] 91.62 91.85 92.07 92.30) 92.52 |
25 88.25} 88.47; 88.70} 88.92 89.15} 89.37) 89.60) 89.82 90.05 90.27
j| 24 86.00) 86.22 86.45 86.67} 86.90] 87.12 87.35 87.57 87.80 £8.02
23 83.75| 83.97) 84.20) 84.42 84.65] 84.87} §&5.10 85.32 85.55 85.77
22 81.50} 81.72 81.95 82.17 82.40] 82.62 82.85 83.07| 83.30) 83.52
21 79.25 19.47 79.70 79.92 80.15] 80.37} 80.60} 80.82 81.05 81.27
{
20 \, 77.00 77.22 77.45 77.07 77.90] 78.12 78.35 78.57 78.80| 79.02
19 74.75 TA.97 75.20 75.42 75.6a) 75.87 76.10 Thess 76.55 76.77
18 72.50 72.72 72.95 3A 73.40} 73.62 73.85 74.07 74.30 TA.52
i 17 70:25 70.47 70.70) ‘70.92 15) West WALCO 82 72.05 ideal!
lo 68.00} 68.22 68.45} 68.67 68.90] 69.12 69.35 69.57 69.80 70.02
15 65.75 65.97 66.20} 66.42 66.65] 66.87) 67.10) 67.32 67.55 67.77
14 63.50} 63.72 63.95| 64.17 64.401 64.62 64.85 65.07| 65.30 65.52
me JIB; 61.25 6147) > 6127.0) iG1E92 62.15} 62.37) 62.60} 62.82 63.05 63.27!
12 59.00) 59.22 59.45 59.67 59.90) 60.12 60.35 60.57 60.80} 61.02)
11 56.75 56.97 57.20 57.42 57.65] 57.87 58.10} 58.32 58.55 58.77
10 54.5 54.72 54.95 DDallai 55.40) 55.62 55.85 56.07 56.30 56.52
9 52225) | 52.47) = -52.70 52.92 5oulol aoosod| i hoosOO 53.82 54.05 54.27
8 50.00} 50.22 50.45 50.67 50.90] 51.12 51.35 SID 51.80 52.02
7 A7.75 47.97 48.20 48.42 48.65} 48.87] 49.10 49.32 49.55 49.77
6 45.50} 45.72 45.95 46.17} 46.40] 46.62} 46.85 47.07| 47.30) 47.52
5 43.25| 43:47 43.70 43.92 44.15] 44.37 44.60} 44.82 45.05) 45.27
4 41.00} 41.22 41.45 41.67 41.90] 42.12 42.35 42.57| 42.80] 43.02
3 38.75| 38.97 39.20) 39.42 39.65] 39.87} 40.10 40.32 40.55 40.77
2 36.50] 36.72 36.95 30.17 37.40] 37.62 37.85 38.07| 38.30 38.52
1 $4.25) 34.47|- 34.70 34.92 SOL OL) oD soT 35.60 35.82 36.05| 36.27
| | ]| ————-}- —_- = ie a rt
| | 0. i. 2. 3. 4. . De 6. Ze 8. 9.

gy

ee ee ee

CONVERSION

OF DEGREES OF REAUMUR INTO DEGREES OF FAHRENHEIT.

31

Degrees of

af | eS es

Fahren.

i.

31.77
29.52
27.27
25.02
22.77

20.52
18.27
16.02
13.77
11.52

9.27
7.02
4.77
2.52
0.27

Fahren.
+32.22 |+32.45

2. Be

Fahren.
+32.67

31.32
29.07
26.82
24.57
22.32

31.55
29.30
27.05
24.80
22.55

20.30 | 20.07

18.05 | 17.82
15.80 | 15.57
13.55 | 13.32
11.30 | 11.07

9.05 8.82
6.80 6.57
4.55 4.32
2.30 2.07
0.05 |— 0.17

| Reaumur.

Fahren.
+0 +32.00
— 0 32.00
= 29.75
— 2 27.50
— 3 25.25
a 23.00
— 5 20.75
- 6 18.50
ld) 16.25
-s 14.00
ae 11.75
—10 9.50
ih Weao)
—12 5.00
=I13 2.75
—14 0.50
—15 — 1.75
—16 — 4.00
—1'7 — 6.25
—18 — 8.50
-19 —10.75
—20 —13.00
—21 15.25
—22 —17.50
—23 —-19.75
—24 —22.00
—25 —24.25
—26 —26.50
—27 —28.75
—28 —31.00
—29 —33.25
—30 —35.50
—31 —37-79
=32 —40.00
—33 —42.25
—34 —44.50
—35 —46.75
—36 —49.00
—37 —51.25
—38 —53.50
—39 —55.75

0.

1.97
4.22
6.47
8.72
—10.97

—13.22
—15.47
—17.72
ao ii
=22.22

—24.47
—26.72
—28.97
—31.22
—33.47

—35.72
—37.97
—40.22
—42.47
—44.72

—46.97
—49.22
—51.47
—53.72
—55.97

1.

— 2.20 |— 2.42
— 4.45 |— 4.67
— 6.70 |— 6.92
— 8.95 |— 9.17
—11.20 |—11.42
—13.45 |-13.67
—15.70 |—15.92
—17.95 |-18.17
—20.20 |—20.42
22.45 |—22.67
24.70 |—24.92
26.95 |—27.17
=29.20 |—29.42
-31.45 |-31.67
—33.70 |—33.92
—35.95 |-36.17
—38.20 |-38.42
~40.45 |—40.67
—42.70 |-42.92
44.95 |-45.17
—47.20 |—47.42
49.45 |—49.67
—51.70 |-51.92
53.95 |-54.17
—56.20 |-56.42
ale

cee

ve |

Tenths of Degrees.

4.

de 6.

Fahren, | Fahren. | Fahren.
+32.90 [+33.12 |+33.35
31.10 | 30.87 | 30.65
28.85 | 28.62 28.40
26.60 | 26.37 26.15
24.35 | 24.12 23.90
22.10 | 21.87 | 21.65
19.85 | 19.62 19.40
17.60 | 17.37 17.15
15.35 | 15.12 14.90
13.10 | 12.87 12.65
10.85 | 10.62 10.40
8.60 8.37 8.15
6.35 6.12 5.90
4.10 3.87 3.65
1.85 1.62 1.40
— 0.40 + 0.62 |— 0.85
PAS 2.87 |— 3.10
— 4.90 }— 5.12 |— 5.35
== 7/15} 7-31 |— 7.60
— 9.40 j-— 9.62 |— 9.85
—11.65 j-11.87 |—12.10
—13.90 —14.35
—16.15 —16.60
—18.40 —18.85
—20.65 —21.10
—22.90 —23.35
—25.15 —25.60
—27.40 2.50
—29.65 —30.10
—31.90 Dec
—34.15 —34.60
—36.40 —36-85
—38.65 —39.10
—40.90 —41.35
—43.15 —43.60
—45.40 —45.85
—47.65 —48.10
—49.90 —50.35
—52.15 —52.60
—54.40 —54.85
—56.65 —57.10
4. 6.

3]

de

Fahren.
+33.57
30.42
28.17
25.92
23.67
21.42

19.17
16.92
14.67
12.42

10.17 |

7.92
5.67
3.42
1.17
1.07

3.32
5.57
7.82
—10.07
—12.32

—14.57°
—16.82
—19.07
—21.32
—23.57

—25.82
—28.07
—30.32
—32.57
—34.382

—37.07
—39.32
—41.57
—43.82
—46.07

—48.32

—50.57
—52.82
—55.07
—57.32

a

8.

Fahren.
+33.80
30.20
27.95
25.70
23.45
21.20

18.95
16.70
14.45
12.20

9.95

7.70
5.45
3.20
0.95
— 1.30

= 3.55
—. 5.80
= Sa)
—10.30
—12.55

—14.80
—17.05
—19.30
—21.55

—23.80

—26.05
—28.30
—30.55
—32.80
—35.05

—37.30
39.55
—41.80

—44.05
—416.30

—48.55
—50.80
—53.05
—55.30
—57.55

8.
|

9.

Fahren.

+34.02
29.97
20.12
25.47
23.22
20.97

18.72
16.47
14.22
11.97

9.72

TAT
5.22
2.97
0.72
— lem

— 3.77
— 6.02
aS al
—10.52
—12.77

—15.02
—17.27
—19.52
21.77
24.02

—26.27
—28.52
—30.77 |
—33.02
—35.27

—37.52
—39.77
—42.02
—44.27
—46.52

—48.77
—51.02
—53.27
—55.52
—57.77

9.

14. CONVERSION OF DEGREES OF REAUMUR INTO CENTIGKADE DEGREES.

| Tenths of Degrees.

—— Se
Degrees of
pe || Oe it he CPS. Se El MST Viena 6% (| ote | eee
| Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centig. | Centiz.
+40 +50.00 |+50.13 |+50.25 |+50.38 |+50.50 150.63 |+50.75 |+50.88 |+51.00 |+51.13
39 48.75 | 48.88 | 49.00 } 49.13 | 49.25 | 49.38 | 49.50 | 49.63 | 49.75 | 49.88
38 ‘47.50 | 47.63 | 47.75 | 47.88 | 48.00 | 48.13 | 48.25 | 48.38 | 48.50 | 48.63
37 46.25 | 46.38 | 46.50 | 46.63 | 46.75 | 46.88 | 47.00 | 47.13 | 47.25 | 47.38
36 45.00 | 45.13 | 45.25 | 45.38 | 45.50 | 45.63 | 45.75 | 45.88 | 46.00 | 46.13
|
35 43.75 | 43.88 | 44.00 | 44.13 | 44.25 | 44.388 | 44.50 | 44.63 | 44.75 | 44.88
34 42.50 | 42.63 | 42.75 |° 42.88 | 43.00 { 43.13 | 43.25 | 48.388 | 43.50 | 43.63
33 41.25 | 41.38 | 41.50 | 41.63 | 41.75 | 41.88 | 42.00 | 42.13 | 42.25 | 42.38
32 40.00 | 40.13 | 40.25 | 40.38 | 40.50 | 40.63 | 40.75 | 40.88 | 41.00 | 41.13
31 38.75 | 38.88 | 39.00 | 39.13 | 39.25 | 39.38 | 39.50 | 39.63 | 39.7% | 39.88
30 ~ 37.50 | 37.63 | 37.75 | 37.88 | 38.00 | 38.13 | 38.25 | 38.88 | 38.50 | 38.63
29 36.25 | 36.38 | 36.50 | 36.63 | 36.75 | 36.88 | 37.00 | 37.13 | 37.25 | 37.38
28 35:00) |) 20213) |) S020! eaose 35.50 | 35.63 | 35.75 | 35.88 | 36.00 | 36.13
27 33.75 | 33.88 | 34.00 | 34.13 | 34.25 | 34.38 | 34.50 | 34.63 | 34.75 | 34.88
26 32.50 | 32.63 | 32.75 | 32.88 | 33.00 | 33.13 | 33.25. | 33-38 | 33.50 | 33.63
| 25 31.257 |/ 31.38) | 31.50 || S630) S175) S188) | 32.00) | 32513) || 825255 | 323388
24 30.00 | 30.13 | 30.25 | 30.38 | 30.50 | 30.63 | 30.75 | 30.88 | 31.00 | 31.13
23 28.75 | 28.88 | 29.00 | 29.13 | 29.25 | 29.38 | 29.50 | 29.63 | 29.75 | 29.88
22 27.50 | 27.63 | 27.75 | 27.88.) 28.00 | 28.13 | 28.25 | 28.38 | 28.50] 28.63
21 26.25 | 26.38 | 26.50 | 26.63 | 26.75 | 26.88 | 27.00 | 27.13 | 27.25 | 27.38
20 25.00 | 25.18 | 25.25 | 25.38 | 25.50 | 25.68 | 25.75 | 25.88 | 26.00) | 20.13
19 23.75 | 23.88 | 24.00 | 24.13 | 24.25 | 24.38 | 24.50 | 24.63 | 24.75 | 24.88
18 22.50 | 22.63 | 22.75 | 22.88 | 23.00 | 23.13 | 23.25 | 23.38 |. 23-50) | 23.63
17 21.25 | 21.38 | 21.50 | 21-63 | 21-'75 [21.88 | 22:00 | 22°13 || 22.25 | 22°38
16 20.00 | 20.13 | 20.25 | 20.38 | 20.50 | 20.63 | 20.75 | 20.88 | 21.00 | 21.13
15 18.75 | 18.88 19.00 | 19.13 19.25 | 19.38 19.50 | 19.63 | 19.75 19.88 |
14 UDO |p We oom |e lide 17.88 | 18.00 | 18.13 18.25 18.38 | 18.50 | 18.63
13 16.25 | 16.38 16.50 | 16.63 | 16.75 | 16.88 17.00 Viele elige2p 17.38
12 15.00 | 15.13 P5225 15.38 15.50 | 15.63 LoViS 15.88 | 16.00 | 16.13
et 13.75 | 13.88 14.00 | 14.13 | 14.25 | 14.38 14.50 14.63 | 14.75 | 14.88
10 12.50 | 12.63 12.75 12.88 13.00 | 13.13 13.25 13.38 13.50 | 13.63
9 25) e388 11.50 | 11.63 11.75 | 11.88 12.00 12.13 120250) 12238
8 10.00 | 10.13 10.25 | 10.38 10.50 } 10.63 10.75 10.88 11.00 | 11.13
i 7 8.75 8.88 9.00 9.13 9.25 9.38 9.50 9.63 9.75 9.88
; 6 ; 7.50 7.63 7.75 7.88 8.00 8.13 8.25 8.38 8.50 8.63
5 6.25 6.38 6.50 6.63 6.75 6.88 7.00 TAS 7.25 7.38
4 5.00 5.13 5.25 5.38 5.50 5.63 5.75 5.88 6.00 6.13
3 3010 3.88 4.00 4.13 4.25 4.38 4.50 4.63 4.75 4.88 !
2 2/50 | *.2.63.| 2:75 |. 2.88 | 3.00 |. 3:12:| 3.25 |. 3.88 |) 3:50"| | 3:6aa!
1 1.25 1.38 1.50 .1.63 1.75 1.88 2.00 Dale 2.25 2.38
0 0.00 0.13 0.25 0.38 0.50 0.63 0.75 0.88 1.00 1.13
| Beas Pe | el ae eee |
tL :

X.- XV.

Pic < Beds

COMPARING THERMOMETRICAL DIFFERENCES

EXPRESSED IN DEGREES OF DIFFERENT SCALES,

IRRESPECTIVE OF THEIR ZERO POINT.

33

x.

34

4° Reaumur = 5° Centigrade = 9° Fahrenheit.

NUMBER OF DEGREES OF FAHRENHEIT = NUMBER OF CENTIGRADE DEGREES.

aan
Tenths of a Degree. |
Degrees '
of
Fahren-
teite 0. 1. DF de 4. od. 6. die 8. 9. |
ion Gente Centig. Ce Centig. | Centig. | Centig. | Centig. | Centig. | Centig. |
0 0.00 0.06 0.11 0.17 6.22 0.28 0.33 0.39 0.44 0.50 |
1 0.56 0.61 0.67 0.72 0.78 0.83 0.89 0.94 1.00 1.06 |
2 1.11 eid 1.22 1.28 133 1.39 1.44 1.50 1.56 1.61 ||
| 3 1.67 72 1.78 1.83 1.89 1.94 2.00 2.06 2.11 2.17
4 2.22 2.28 7288: 2.39 2.44 2.50 2.56 2.61 2.67 2.72
5 2.78 2.83 2.89 2.94 3.00 3.06 3-11 Sala 3.22 3.28
6 3.30 3.39 3.44 3.50 3.56 3.61 3.67 4.72 3.78 3.83
if, 3.89 3.94 4.00 4.06 4.11 4.17 4.22 4.28 4.33 4.39
8 4.44 4.50 4.56 4.61 4.67 4.72 4.78 4.83 4.89 4.94
9 5.00 5.06 Oeilil! 5.17 5.22 5.28 5.33 5.39 5.44 5.50
XI. NUMBER OF DEGREES OF FAHRENHEIT — NUMBER OF DEGREES OF REAUMUR.
Tenths of a Degree.
| Degrees
of
Fahren-
mage hes 1. 2. Bo. | vasa Peels 7. S. 9.
Reaumar. /heanmur. Reaumur. | Reaumur. | Reaumur. ees Roadmur: Reaumur. | Reaumur Beaune |
0 0.00 0.04 0.09 0.13 0.18 0.22 0.27 0.31 0.36 0 40
1 0.44 0.49 0.53 0.58 0.62 0.67 0.71 0.76 0.80 0.84
7 0.89 0.93 0.98 1.02 1.07 1.11 1.16 1.20 ee 1.29
3 1.33 1.38 1.42 1.47 1-51 1.56 1.60 1.64 1.69 1.73
4 1.78 1.82 1.87 1.91 1.96 2.00 2.04 2.09 Zales 2S,
5 | 2.22 DA ePrrf Deol 2.36 2.40 2.44 2.49 2.53 2.58 2.62 |
6 2.67 Didi: 2.76 2.80 2.84 2.89 2.93 2.98 3.02 3.07
7 3.11 3.16 3.20 3.24 3.29 3.33 3.38 Ste 3.47 Sep
8 3.56 3.60 3.64 3.69 3.00 3.78 3.82 3.87 3.91 3.96
9 4.00 4.04 4.09 4.13 4.18 4.22 4.27 4.31 4.36 4.40
a aia aan
XII. NUMBER OF CENTIGRADE DEGREES = NUMBER OF DEGREES OF REAUMUR. |
Tenths of a Degree.
Centig,
Degrees.
Ries |e 1. 2. Se | oe eS. 6. %. 8. 9.
Reaumur. |Reaumur |Reaumur. |Reaumur. |Reaumur Rese Rene Roscmeel Be Reaumur.
0 0.00 0.08 0.16 0.24 0.32 0.40 0.48 0.56 0.64 0.72
1 0.80 0.88 0.96 1.04 D2 1.20 1.28 1.36 1.44 1.52
2 1.60 1.68 1.76 1.84 1.92 2.00 2.08 2.16 2.24 Disc ms
; 3 2.40 2.48 2.56 2.64 2.72 2.80 2.88 2.96 3.04 Sale |
4 3.20 3.28 3.36 3.44 3.52 3.60 3.68 3.76 3.84 3.92 |
5 4.00 4.08 4.16 4.24 4.32 4.40 4.48 4.56 4.64 4.72
6 4.80 4.88 4.96 5.04 5.12 5.20 5.28 5.36 5.44 5.52 |
! 7 5.60 5.68 5.76 5.84 5.92 6.00 6.08 6.16 6.24) 3) 6532)
8 6.40 | 6.48 6.56 6.64 6.72 6.80 6.88 6.98 | 7.04 | 7.12
9 720 eT eae Nyaa Leo GeO we GSc rl MmecG ml Geedaa ROD
34

eS

ee ee ee

X11.

Centig.

Degrees.

30

NUMBER OF CENTIGKADE DEGREES = NUMBER OF DEGREES OF FAHRENHEIT.

4° Reaumur — 5° Centigrade — 9° Fahrenheit.

3.

Fahr.
0.54

2.34
4.14
5.94
7.74

9.54
11.34
13.14
14.94
16.74

Tenths of a Degree.

4.

Fahr.
0.72
2.52
4.32
6.12
7.92

9.72
11-52
13.32
15.12
16.92

od.

Fahr.
0.90
2.70
4.50
6.30
8.10

9.90
11.70
13.50
15.30
17.10

6.

Fahr.
1.08
2.88
4.68
6.45
8.28

10.08
11.88
13.68
15.48
17.28

7

Fahr.
1.26
3.06
4.86
6.66
8.46

10.26
12.06
13.86
15.66
17.46

Fahr.
1.44
3.24
5.04
6.84
8.64

10.44
12.24
14.04
15.84
17.64

9.

Fahr.
1.62
3.42
5.22
7.02
8.82

10.62
12.42
14.22
16.02
17.82

Degrees
of
Reaum.

Tenths of a Degree.

0. ie 2. 3. 4. 5. 6. Ze 8. 9.
* a S rs € ee ue ae se aa
Centig. | Centig. | Centig. Centig. | Centig. | Centig. | Centig. | Centig. | Centig. Centig. |
0.00 0.12 0.25 0.37 0.50 0.62 0.75 0.87 1.00 1.12
1.25 1.37 1.50 1.62 1.75 1.87 2.00 2.12 2.25 2.37
2.50 2.62 2.75 2.87 3.00 3.12 3.25 3.37 3.50 2.62
3.75 3.87 4.00 4.12 | 4.25 4.37 4.50 4.62 4.75 4.87
5.00 5.12 5.25 5.37 5.50 5.62 5.75 5.87 6.00 5.12
6.25 6.37 6.50 6.62 6.75 6.87 7.00 7-12 7.25 7.37
7.50 7.62 7.75 7.87 8.00 8.12 8.25 8.37 8.50 | 8.62
8.75 8.87 9.00 9.12 9.25 9.37 9.50 9.62 9.75 9.87
10.00 10.12 10.25 10.37 10.50 | 10.62 | 10.75 10.87 11.00
11.25 11.37 | 11.50 11.62 D5) es 7 12.00 Ms, 12.25

Degrees
of
Reaum.

0.

Fahr.

1.

Fahr.

2.

Fahr.

Fahr.

Fahr.

Fahr.

Fahr.

Fahr.

0 0.00 0.22 0.45 0.67 0.90 1.35 1.57 1.80 2.02
1 2.25 2.47 2.70 2.92 3.15 3.60 3.82 4.05 4.27
2 4.50 4.72 4.95 5.17 5.40 5.85 6.07 6.30 6.52
3 6.75 6.97 7-20 7.42 7.65 8.10 8.32 8.55 8.77
4 9.00 9.22 9.45 9.67 9.90 10.35 10.57 | 10.80 | 11.02
5 eZee eA ell Om tao led 12.60 | 12.82 | 13.05 | 13.27
6 13.50 13.72 | 13.95 14.17 | 14.40 14.85 15.07 | 15.30 | 15.52
7 15.75 15.97 | 16.20 | 16.42 | 16.65 17.10 17.32 | 17.55 | 17.77
8 18.00 | 18.22 | 18.45 18.67 | 18.90 | 19.12 | 19.35 19.57 | 19.80 | 20.02
9 | 20.25 | 20.47 | 20.70 | 20.92 | 21.15 | 21.37 | 21.60 | 21.82 | 22.05 | 22.27
A 35

|
|
|

11.12

12.37

XV. NUMBER OF DEGREES OF REAUMUR = NUMBER OF DEGREES OF FAHRENHEIT.

Fahr.

37

METEOROLOGICAL TABLES,

SERIES IT.

HYGROMETRICAL TABLES.

5, aed

oe

?

39

CON rer ON Ts,

(The figures refer to the folio at the bottom of the page.)

PracticaL TABLES BASED ON ReGNaAuLT’s HyGrometricat Constants.

CABLE. 1.
se IL.
ce ILL.
e IV.
ce VE
ce VI.
“e VII.
6G WANNE
c IX.
6c Xa

a. In French Measures.

Elastic Force of Aqueous Vapor, by Regnault

Psychrometrical Tables, by Haeghens : :

For deducing the Relative Humidity from the Teens of Dew-
Point aS by Haeghens

_
Factor — Mga computing Relative Humidity
Weight 7 Vapor contained in a Cubic Metre of Air
b. In English Measures.

Elastic Force of Vapor, reduced from Regnault’s Table

Psychrometrical Tables, by A. Guyot : ;

For deducing the Relative Humidity from the Tieton of Dew-
oe CG a by A. Guyot

Factor ° | for computing Relative Humidity

Weight , Vapor in a Cubic Foot of Saturated Air

Page
9
12

30

36
38

43
46
75

90
94

PracTICAL TABLES BASED ON THE HyGROMETRICAL CONSTANTS ADOPTED IN THE

‘PARLE. XI.
coo XL.
See XT:
CXL,
Berets XV
eee X VI.
co Xx VIE
OX TVS.

GREENWICH OBSERVATIONS.

Elastic Force of Aqueous Vapor

Psychrometrical Tables, by Glaisher

Factors for computing the Force of Vapor from Psychrometrical
Observations, by Apjohn’s Formula

Factors for finding the Temperature of the Dew- Paint ae le
Readings of the Psychrometer

Weight of Vapor contained in a Cubic mee of eee Air

Factors for deducing the Weight of Vapor from the Indications of
Dew-Point Instruments .

For comparing the Weight of a Cubic Foot of ny a of Satu-
rated Air : ; :

Factors for finding the Wahiperduire of thie ewe Point from the

Readings of the Psychrometer
3

101
104

140

142
143

143

144

146

TasLe XVIII.
XTX.

XX.
DOXT.

66

XXII.

XXIII.

XXIV.

XXV.

XXVI.

XXVII.

CONTENTS.
MISCELLANEOUS TABLES FOR COMPARISON.

Elastic Force of Vapor, expressed in Millimetres, by August .
Elastic Force of Vapor, expressed in Millimetres, by Kaemtz
Elastic Force of Vapor, expressed in Millimetres, by Magnus
Elastic Force of Vapor, in English Inches, from the Royal
Society’s Report : : :
For showing the Differences in the Values of i Pisce eee
of Vapor adopted by different Authorities . :
Weight of Vapor, in Grammes, contained in a Cubic Metre of
Saturated Air, by Pouillet , :
Weight of Vapor, in Grammes, ee ina Cubic Metre of
Air, by Kaemtz : : ; i . : : :
Force of Vapor and Relative Humidity corresponding to the
Degrees of Saussure’s Hair-Hygrometer, by Gay-Lussac
For deducing the Relative Humidity from the Indications of
Saussure’s Hair-Hygrometer, by Haeghens : :
Relative Humidity corresponding to the Degrees of Saussure’s
Hygrometer, by Kaemtz . . : :

‘ APPENDIX.

Page
150
152

152

153

154

156

For COMPARING QUANTITIES OF RAIN-WATER GIVEN IN DIFFERENT MEASURES.

ance

66

Conversion of Centimetres into English Inches

Il. Conversion of Centimetres into French Inches and Lines

III. Conversion of English Inches into Centimetres .

IV. Conversion of English Inches into French Inches and Lines .

V. Conversion of French Inches and Lines into Centimetres

VI. Conversion of French Inches and Lines into English Inches.

164
164
165
165
166
167

41

FeVeGhTOrwrr TRC Ar TAB LES.

HyGRomeETERS, or instruments used for determining the amount of aqueous vapor
present in the air, are of three classes. In the first, we find the hygrometers
based on the absorption of moisture by hygroscopic substances, the best of which is
Saussure’s Hair-Hygrometer ; in the second class, the Psychrometer, or wet-bulb
thermometer, which gives the temperature of evaporation ; in the third, the various
instruments designed for ascertaining the temperature of the dew-point. From the
data furnished by each of these instruments, and a table of the elastic forces of vapor
at different temperatures, the humidity of the air can be deduced with more or less
accuracy.

The use of the hygroscopic substances as hygrometers having been nearly given
up on account of the inaccuracy of the results, the variability of the instruments, and
the difficulty, if not impossibility, of making them comparable, the psychrometer and
the dew-point instruments represent the two methods now usually employed in
Meteorology. The following set, therefore, contains extensive tables, in French and
English measures, for deducing the hygrometrical condition of the atmosphere from
the indications of the Psychrometer and of the dew-point instruments, to which have
been added tables of the weight of vapor, in a given space, at different temperatures,
— an element often needed in Meteorology.

As, however, the results deduced from the same data furnished by the observations
may considerably differ, according to the values of the elastic force of vapor, and the
formulze used in the computation, the tables have been arranged in two series.

The first series contains Regnault’s table of the elastic forces of vapor, with tables
of the three kinds above mentioned, together with a corresponding set in English
measures. ‘Tables V. to X. have been computed for this volume.

The second series gives the table of elastic forces of vapor deduced from Dalton’s
experiments, and adopted in the Greenwich Observations, together with the various
tables based on it.

B 5

42 HYGROMETRICAL TABLES.

A third series of miscellaneous tables furnishes the means of comparing the differ-
ent values of the elastic force and weight of vapor determined by various physicists,
as well as the results of Saussure’s Hair-Hygrometer, with those obtained by other
methods.

An Appendix, containing tables for comparing the quantity of rain-water indicated
in different measures, closes the set.

Though the first series of tables, based on Regnault’s table of tensions, is recom-
mended for ordinary use, as being derived from the determinations which seem to
deserve the greatest degree of confidence, it was thought expedient to give also the
Greenwich tables, which have been, and still are, so extensively used in England, in
order to enable meteorologists to judge of the differences which exist between the
results obtained by them and those deduced from the constants of Regnault and
others.

PRACTICAL PAB LES,

FRENCH MEASURES,

BASED ON REGNAULTS HYGROMETRICAL CONSTANTS.

f
:
-
if
i ry
; o
Rg
i
;
4
- .
D 7
~ “ ei fy mee yee wre
‘ ¥ ' é
g AS Oe EE DE
an
ey,
P
1
f

MEATS ES GLb Seta ess SAARI BO OagAg
i ms a

TABLE
OF

THE ELASTIC FORCE OF AQUEOUS VAPOR,

EXPRESSED IN MILLIMETRES OF MERCURY FOR CENTIGRADE TEMPERATURES,
BY REGNAULT.

Tuts table contains the elastic forces of vapor corresponding to every tenth of a
degree of temperature between — 35° and + 40° Centigrade, as determined by the
experiments of V. Regnault, made by order of the French government, for the
purpose of establishing the numerical value of the elements which enter into the
computations concerning the steam-engine. ‘These results are generally considered
as the most accurate science possesses at present. They are published in the
Mémoires de U Institut, Tom. XXI.; and more correctly in Regnault’s Etudes sur
P Hygrométrie, in the Annales de Chimie et de Physique. In Vol. XV. Regnault
gives the table of elastic forces for every tenth of a degree from —10° to + 35°
Centigrade, which is reprinted in Table I. The numbers below —10° and above
+ 35°, in the same table, have been taken from another table for every full degree,
previously published in Vol. XI. p. 333 of the same periodical, and in the same
volume of the Mémoires de [’ Institut, extending from — 32° to + 230°.

It should be remarked, however, that the numbers below zero, in the two tables
just mentioned, having been computed from different formulas of interpolation, slightly
disagree. In order to establish a continuity, therefore, the numbers in Table I. cor-
responding to full degrees from —10° to — 35° have been formed by starting from
the value due to —10° in the larger table of Regnault, and subtracting from it the
difference between —10° and —11° in the other table, in order to find the value
of —11°, and so on, by subtracting successively the corresponding differences to
— 35°. For the fractions of degrees below —10°, the mean values have been
adopted as sufficiently accurate for meteoroiogical purposes.

46

I. ELASTIC FORCE OF AQUEOUS VAPOR,

EXPRESSED IN MILLIMETRES OF MERCURY FOR CENTIG3ADE TEMPERATURES.

By REGNAULT.

et ee ee ere

| Tenths of Degrees.
Centigrade 0. 1. 2. S: | A. 5. 6. 7. 8. 9.
° Millim. Millim. Milli. Millim. Millim. Millim. | Millim. Millim. | Millim. | Millim.

—35 0.221 0.219 0.216 0.214 0.211 0.209 0.207 0.204 0.202 0.199
—34 0.247 0.244 0.242 0.249 0.237 0.234 0.231 0.229 0.226 0.224
—33 0.275 0.272 0.269 0.267 0.264 0.261 0.258 0.255 0.253 0.250
—32 0.305 | 0.302 0.299 0.296 0.293 0.290 | 0.287 | 0.284 0.281 | 0.278
—3l 0.337 0.334 0.331 0.327 0.324 0.321 0.518 0.315 0.311 0.308
—30 0.371 0.368 0.364 0.361 0.357 0.354 0.351 0.347 0.344 0.340
—29 0.409 0.405 0.401 0.398 0.394 0.390 0.386 0.382 0.379 0.375
—28 0.449 0.445 0.441 0437 0.433 0.429 0.425 0.421 0.417 0.413
—27 0.493 0.489 0.484 0.480 0.475 0.471 0.4167 0.462 0.458 0.453
—26 0.540 0.535 0.531 0.526 0.521 0.516 0.512 | 0.507 | 0.502 | 0.498 !)
—25 0.590 0.585 | 0.580 | 0.575 | 0.570 0.565 0.560 | 0.555 0.550 | 0.545
—24 0.645 0.639 0.634 0.628 0.623 0.617 0.612 0.606 0.601 0.595
—23 0.704 0.698 0.692 0.686 0.680 0.674 0.669 0.663 0.657 0.651
—22 0.768 0.762 0.755 0.749 0.742 0.736 0.730 0.723 0.717 0.710
—21 0.838 0.531 0.824 0.817 0.810 0.803 0.796 0.789 0.782 0.775
—20 0.912: | 0.905 0.897 | 0.890 | 0.882 0.875 0.868 0.860 | 0.853 | 0.845
—19 0.993 0.985 0.977 0.969 0.961 0.952 0.944 0.936 0.928 0.920
—18 1.080 1.071 1.063 1.054 1.045 1.036 1.028 1.019 1.010 1.002
—17 1.174 1.165 1.155 1.146 1.136 1.127 1.118 1.108 1.099 1.089
—-16 1.275 1.265 1.255 1.245 1.235 1.224 1.214 1.204 1.194 1.184
—15 1.385 1.374 1.363 1.352 1.341 1.330 1.319 1.308 1.297 1.286
—-14 1.503 1.491 1.479 1.468 1.456 1.444 ects 2 1.420 1.409 1.3597
-13 1.631 1.618 1.605 1.593 1.580 1.567 1.554 1.541 1.529 1.516
-12 1.765 1.754 1.741 1.727 Negi 1.699 1.686 1.672 1.658 1.645
—-l1 1.918 1.903 1.888 1.873 1.858 1.843 1.828 1.813 1.798 1.783
—10 2.078 2.062 2.046 | 2.030 | 2.014 1.998 1.982 1.966 1 950 1.934
-9 2.261 Zot 2.223 2.204 2.186 2.168 2.150 Ase 2.114 2.096
- 8 2.456 2.436 2.4116 2.396 2.376 2.356 2.307 2.318 2.299 2.280
— 7 2.666 2.645 2.624 2.603 2.582 2.561 2.540 2.519 2.498 Dekandl
—- 6 2.890 2.867 2.844 2.821 2.798 2.776 2.754 Doe 2.710 2.688
—- 5 3.131 3.106 3.082 3.058 3.054 3.010 2.986 2.962 2.938 2.914
— 4 3.087 3.561 3.335 3.309 | 3.283 3.257 Sool 3.206 3.181 3.156
- 3 3.662 3.634 3.606 3.578 3.550 3.522 3A9D 3.168 3.441 ots
—2 3.955 3.925 3.895 3.865 | 3.536 3.807 3.418 3.749 3.720 3.691
—- 1 4.267 4.235 4.203 4..71 4.140 4.109 4.078 4.047 4.016 3.985
- 0 4.600 4.565 4.531 ACO sito 4.430 4.397 4.364 4.331 4.299

| Gan area heh eae | ae aes. | Pee alee | Higa naan |

[ec besdeeent a re ee : sae =
B 10

ELASTIC FCRCE OF AQUEOUS VAPOR. — REGNAULT. 47

| Tenths of Degrees. ‘
| Centigrade

Degrees. | 0. 1. 2. De 4. De 6. 7 8. 9.
{

— —

Millim. |} Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. 4
4.600 | 4.633 | 4.667 | 4.700 | 4.733 4.707 | 4.801 4.836 | 4.871 4.905
4.940 | 4.975 | 5.011 5.047 | 5.082 5.118; 5.155} 5.191 5.228 | 5.265
5.302 | 5.340 | 5.3878 | 5.416 | 5.454 5.491] 5.530 | 5.569 | 5.608 5.647
5.687 | 5.727 | 5.767 | 5.807 | 5.848 5.889 | 5.930 | 5.972 | 6.014 | 6.055
6.097 | 6.140 | 6.183 | 6.226 | 6.270 6.313! 6.357 | 6.401 6.445 | 6.490
6.534 | 6.580 | 6.625 | 6.671 6.717 6.763 | 6.810 | 6.857 | 6.904 | 6.951

we OO

oOo em Ww

6.998 | 7.047 | 7.095 | 7.144 | 7.193 | 7.242] 7.292 | 7.342 |} 7.392) 7.442
7.492 | 7.544 | 7.595 | 7.6417 | 7.699 | 7.751] 7.804 | 7.857 | 7.910] 7.964
8.017 | 8.072 | 8.126] 8.181 | 8.236] 8.291] 8.347 | 8.404] 8.461 | 8.517
8.574 | 8.632 | 8.690] 8.748 | 8.807] 8.865] 8.925 | 8.985 | 9.045 | 9.105
10 9.165 | 9.227 | 9.288 | 9.350 | 9.412] 9.474] 9.537 | 9.601 | 9.665 | 9.728

Scant n

Il 9.792 | 9.857 | 9.923 | 9.989 | 10.054 | 10.120 | 10.187 | 10.255 | 10.322 | 10.389
12 10.457 | 10.526 | 10.596 | 10.665 | 10.734 | 10.804 | 10.875 | 10.947 | 11.019 | 11.090
13 11.162 | 11.235 | 11.309 | 11.383 | 11.456 | 11.530 | 11.605 | 11.681 | 11.757 | 11.832
14 11.908 | 11.986 | 12.064 | 12.142 | 12.220 | 12.298 | 12.378 | 12.458 | 12.538 | 12.619
15 12.699 | 12.781 | 12.864 | 12.947 | 13.029 | 13.112 | 13.197 | 13.281 | 13.366 | 13.451

16 13.536 | 13.623 ; 13.710 | 13.797 | 13.885 | 13.972 | 14.062 | 14.151 | 14.241 | 14.331
i 14.421 | 14.513 | 14.605 | 14.697 | 14.790 | 14.882 | 14.977 | 15.072 | 15.167 | 15.262
18 15.357 | 15.454 | 15.552 | 15.650 | 15.747 | 15.845 | 15.915 | 16.045 | 16.145 | 16.246
19 16 346 | 16.449 | 16.552 | 16.655 | 16.758 | 16.861 | 16.967 | 17.073 | 17.179 | 17.285
20 17.391 | 17.500 | 17.608 | 17.717 | 17.826 | 17.935 | 18.047 | 18.159 | 18.271 | 18.383

22 19.659 | 19.780 | 19.901 | 20.022 | 20.143 | 20.265 | 20.389 | 20.514 | 20.639 | 20.763
| 23 20-888 | 21.016 | 21.144 | 21.272 | 21.400 | 21.528 | 21.659 | 21.790 | 21.921 | 22.053
24 22.184 | 22.319 | 22.153 | 22.588 | 22.723 | 22.858 | 22.996 | 23.135 | 23.273 | 23.411
25 23.550 | 23.692 | 23.834 | 23.976 | 24.119 | 24.261 | 24.406 | 24.552 | 24.697 | 24.842

|

|

26 24.988 | 25.138 | 25.288 | 25.438 | 25.588 | 25.738 | 25.891 | 26.045 | 26.198 | 26.351
27 26.505 | 26.663 | 26.820 | 26.978 | 27.136 | 27.294 | 27.455 | 27.617 | 27.778 | 27.93

28 || 28.101 | 28.267 | 28.433 | 28.599 | 28.765 | 28.931 | 29.101 | 29.271 | 29.441 | 29.612 ||

29 | 29.782 | 29.956 | 30.131 | 30.305 | 30.479 | 30.654 | 30.833 | 31.011 | 31.190 | 31.369

Ae *30 31.548 | 31.729 31.911 | 32.094 | 32.278 | 32.463 | 32.650 | 32.837 | 33.026 | 33.215 |

|

|

2] 18.495 | 18.610 | 18.724 | 18-839 | 18.954 | 19.069 | 19.187 | 19.305 | 19.423 | 19.541

31 || 33.406 | 33.596 | 33.787 | 33.980 | 34.174 ] 34.368 | 34.564 | 34.761 | 34.959 | 35.159
32 | 35 359 | 35.559 | 35.760 | 35.962 | 36.165 | 36.370 | 36.576 | 36.783 | 36.991 | 37.200
33 || 37.410 | 37.621 | 37.832 | 38.045 | 38.258 | 38.473 | 38.689 | 38.906 | 39.124 | 39.314
34 || 39.565 [39.786 | 40.007 | 40.230 | 40.455 | 40.680 | 40.907 | 41.135 | 41.364 | 41.595 |

3) 41.827 | 42.059 | 42.293 | 42.527 | 42.763 | 43.000 | 43.238 | 43.477 | 43.717 | 43.959

36 || 44.201 | 44.445 | 44.690 | 44.936 | 45.183 | 45.431 | 45.681 | 45.932 | 46.184 | 46.4137
37 | 46.691 | 46.947 | 47.203 | 47.462 | 47.721 | 47.981 | 48.243 | 48.506 | 48.770 | 49.035
33 |) 49.302 | 49.570 | 49.839 | 50.110 | 50.382 | 50.655 | 50.929 | 51.205 | 51.481 | 51.759
39 || 52.039 | 52.320 | 52.602 | 52.885 | 53.170 | 53.456 | 53.743 | 54.032 | 54.322 | 54.613
40 || 54.906 | =5.200 | 55.196 | 55.793 | 56.091 | 56.391 | 56.692 | 56.994 | 57.298 | 57.603

Oran yaa 2. Be 4. |. od. 6 7 8. 2.

i

aE ll

48

fl.

PSYCHROMETRICAL TABLES.

GIVING IMMEDIATELY THE FORCE OF AQUEOUS VAPOR AND THE RELATIVE HUMIDITY
FROM THE INDICATIONS OF THE PSYCHROMETER.

CatcuLtaTeD BY M. T. HarcHENs.

In his Etudes sur ? Hygrométrie,* M. V. Regnault discusses the theoretical bases of

the formula of the Psychrometer, given by M. August, which was,

op — Mh
in which h represents the height of the barometer; ¢ the temperature of the air given
by the dry-bulb thermometer ; ¢’ the temperature of the wet-bulb thermometer ; f’ the
force of aqueous vapor in the saturated air at a temperature equal to é’; x the elastic
force of aqueous vapor which exists in the air at the time of the observation.

After having modified some of the numerical values, which form the coefficients,
M. Regnault adopted this formula,

0.429 cD
a Sie h.

But comparative experiments, made by himself, showed that by substituting the
coefficient 0.480 for that of 0.429, the calculated results, and those obtained by direct
observation, agree perfectly in the fractions of saturation, which are: greater than 0.40.
This formula thus modified, or

pans
has been used for calculating the fallow ee In that part of the tables which
supposes the wet-bulb to be covered with a film of ice, or below the freezing point,

the value 610 — ¢’, which represents the latent heat of aqueous vapor, has been
changed into this: 610 + 79 — ¢’ = 689 — ?’.

The only hypothesis made, is that of a mean barometric pressure h, equal to 755
millimetres. If we take into account the causes of errors inherent to the psychrom-
eter, and to the tables of the force of vapor, by means of which the absolute force of
vapor is calculated, as well as to the differences of these tensions, taken at tempera-
tures differing only by one tenth of a degree, it will be obvious that the correction due
to the variations of barometric pressure can almost always be neglected. Neverthe-
less, a separate table has been calculated, giving the correction to be applied to the
numbers in the Psychrometrical Tables for the heights of the barometer between 650
and 800 millimetres. It will be found at the end of the tables.

The disposition of the tables is the following : —

The temperatures are noted in centigrade degrees ; the elastic force of vapor in the
aur, or its pressure on the barometer, is expressed in millimetres of mercury ; the rel-

* Etudes sur 1 Hygrométrie, par M. V. Regnault. Annales de Chimie et de Physique, 3™° Série, Tom
XV., 1845.
B 12

PSYCHROMETRICAL TABLES. 49

ative humidity is indicated in per cent. of the full saturation of the air at the corre-
sponding temperature of the dry-bulb thermometer ¢.

The first vertical column contains the indications of the wet-bulb thermometer 7’,
beginning with the temperatures below the freezing point, when the bulb is covered
with ice, from —35°, and continuing from the freezing point up to +-35° centigrade,
the bulb being simply wet.

The second column gives the differences of the foree of vapor for each tenth (0°.1)
of a degree, between each full degree of the first column. It enables the observer to
find out the correction for any fraction of a degree of the wet-bulb thermometer.

The following double columns give immediately the force of vapor and the relative
humidity, corresponding to each degree of the wet-bulb, placed in the first column,
on the same horizontal line, and to differences of the two thermometers, or to t — 0’,
taken at every two tenths of a degree.

The horizontal column at the bottom indicates the mean difference, for each tenth
of a degree, of the force of vapor contained in the same horizontal line. It gives the
correction for the intermediate differences of the thermometers; 0.1, 0.3, 0.5, 0.7,
0:9, &c., &c.

To meet the wants arising from the extreme climate of North America, the tables
of Mr. Haeghens have been extended from —15° to —385° centigrade, and from
-+30° to +35° of temperature of the wet-bulb, and to +40° of temperature of the
dry-bulb thermometer. The forces of aqueous vapor of Regnault, as given in
Table I., have been used for the calculations.

Use of the Tables.

Enter the tables with the difference of the two thermometers, or ¢ — ¢/, and with
the temperature of the wet-bulb thermometer ¢’, taking the first three pages, when the
temperature of the wet-bulb is below the freezing point ; and the following ones when
it is above the freezing point.

Seek first the column at the head of which you find the difference of the thermom-
eters; go down as far as the horizontal line, at the beginning of which you see the
temperature of the wet-bulb thermometer ; there you find the force of vapor, and the
relative humidity corresponding to your observation.

Two corrections for fractions may be required for a complete calculation of the
force of vapor; one for the fractions of degrees of the wet-bulb thermometer ; anoth-
er for the intermediate differences of the two thermometers, viz. for 0.1, 0.3, 0.5,
0.7, &c.

The first correction for fractions of degrees of the wet-bulb thermometer is found by
multiplying the decimal fraction by the number placed in the second vertical column
next to the whole degree, which number is the value of a tenth of a degree. The
product must be added to the value of the fuli degree given in the table, when the tem-
perature of the wet-bulb is above the freezing point: it must be subtracted when the
temperature is below the freezing point, and receives the sign —. ‘This correction is too
important to be neglected.

The second correction, ‘ess important, for the intermediate differences of the ther-

Be 13

PSYCHROMETRICAL TABLES.

50

mometers, which are greater by one tenth than those indicated in the tables, is given
It is constant and always sub

in the horizontal column at the bottom of the page.

tractive.

Examples of Calculation.
Difference of thermometers, or ¢ — t! el | a

Temperature of the wet-bulb thermometer, t/ = 11°.0.
We find, page 18, for ¢ — ¢’, fifth double column ; and for ¢’, first column,

The force of vapor in the air= 9"".31.
Relative humidity, ails
Difference of thermometers, or t — t', == 7°.2.
Wet-bulb thermometer, or 0’, —— lips
We find, page 24, for ¢ — t’, = 7°.2, and ¢’ = 17°.0, force of vapor 10"™.02.
Additive correction for fraction 0°.9, or 9 K 0.09= O .SI1.
83.

Force of vapor in the air = 10
Relative humidity, 46

Difference of thermometers, t— t/ = 6°.5.
Wet-bulb thermometer, ¢’ == 2o0:

We find, page 23, for t/ = 23°.0, and t —t', or difference,
16" .94; applying immediately the correction found at the bottom of the page for one

= 6°.4, force of vapor

tenth more difference, or 6°.4 + 0.1 —6°.5, we have,
Force of vapor = 16"™.94 — 0.06, or 16™™-.88.
Additive correction for fraction 0.6 of the wet-bulb, 6 X 0.13= O .78.

.66.

Force of vapor in the air = 17
Relative humidity, 56.

The wet-bulb thermometer covered with ice.

Difference of thermometers, ¢ — t/ = 2°.8.
Wet-bulb thermometer (ice), ¢/ = —8°.5.
Page 17 gives for t—t’ = 2°.8, and t/ = —8°.0, force of vapor= 1™"-.0.
Subtractive correction for fraction 0.5 of wet-bulb, 5 X 0.019—=—0_ .1.

Force of vapor in the air=0_ .9.
Relative humidity, 30.

14

Il. PSYCHROMETRICAL TABLES. 51

Below the Freezing-Point; the Bulb covered with a Film of Ice.

t—t/, Difference of Wet and Dry Bulb Thermometers.

al
0°.0 0°.2 0°.4 0°.6 0°.8 1°.0 |

| Rela Rela-

Rela- Rela- | Rela-

tive tive tive tive tive tive
Force of} }{u- Hu- |Force of, qu- [Force of] jtu- |Force of| yyy. (Force of} Hy-
Vapor. | mid- mid- | Vapor. | mid- | Vapor. | mid- | Vapor. | mia- | Vapor. | mid-
ity ity. ity. ity. ity. ity.

| Millim, Millim. Millim Millim. Millim,

96 | 3.75 | 92 | 3.64 | 88 | 3.54 | 84 | 3.43 | 80
96 | 4.06 | 92 | 3.95 | 49 | 3.85 | 85 | 3.74 | 81
96 | 4.40 | 93 | 4.29 | 89 | 4.19 | 86 | 4.08 | 82

3.96 | 100
4.27 | 100
4.60 | 100

See eee ee ee eS SS ES ee eee

0.22 | 100 53

0.25 | 100 58 | 0.05 | 18

0.27 | 100 62) 1/007) |) 26

0.30 | 100 66 | 0.10 | 33

0.34 | 100 69 | 0.14 | 39 | 0.03 | 10

0.37 | 100 7a Onk7 1 440 1007 || ale

0.41 | 100 74. |. 0.21.) 46) | O21) | 25

0.45 | 100 76 | 0.25 | 53 | 0.15 |- 31 | 0.04 9

0.49 | 100 78 | 0.29 | 57 | 0.19 | 36 | 0.09 | 17

0.54 | 100 80 || 0.34 |-60 || 0.24 | 41 | 0.13 | 23 | 0.03 6

0.59 | 100 81 | 0.39 | 63 | 0.29 | 46 | 0.18 | 29 |] 0.08 |} 12

0.64 | 100 82 | 0.44 | 66 | 0.384 | 50 | 0.24 | 34 | 0.141 19

0.70 | 100 84 | 0.50 | 69 | 0.40 | 53 | 0.30 | 39 | 0.19 | 25

0.77 | 100 85 | 0.56 | 71 | 0.46 | 57 | 0.36 | 44 | 0.26 | 31

0.84 | 100 86 | 0.63 | 73 | 0-53 | 60 | 0.43 | 48 | 0.33 | 36

0.91 | 100 ’ g7 | 0.71 | 75 | 0.61 | 63 ! 0.50 |. 51 | 0.40 / 40

0.99 | 100 ss | 0.79 | 77 | 0.69 | 66 | 0.58 |-55 | 0.48 | 45 |

1.08 | 100 89 | 0.87 | 78 | 0.77 | 68 | 0.67 | 58 | 0.57 | 48 |

1.17 | 100 90 | 0.97 | 80 | 0.87 | 70 | 0.76 | 61 | 0.66 | 52

1.27 | 100 90 | 1.07 | 81 | 1.97 | 72 | 0.86 | 63 | 0.76 | 55

1.38 | 100 91 | 1.18 | 82 | 1.08 | 74 | 0.97 | 66 | 0.87 | 58

1.50 | 100 92 | 1.30 | 83 | 1.19 | 76 | 1.09 | 68 | 0.99 | 61

1.63 | 100 OA Ske eles2o | vite ede 2c Ol patistel || 6:3

1.77 | 100 93 | 1.56 | 85 | 1.46 | 78 | 1.35 | 71 | 1.25 | 65

1.92 | 100 93 | 1.71 | 86 | 1.61 | 80 | 1.50 | 73 | 1.40 | 67
2.08 | 100 SES) 87 | lea Sie t-66.) 575 [71-56 || .69

2.26 | 100 O4 18220501 688) 11-950) S82 -85: | 76 sez |) TL

2.46 | 100 OW e2s2 5a Som moni a ES 2k fall e Sei ede Otel des

2.67 | 100 94 | 2:46)| 89 || 2-35 | S41. 2:25 79) 12-15 | 74
| 2.89 | 100 95 | 2.68 | 90 | 2.58 | 85 | 2.47 |] 80 | 2.37 ' 76 |

3.13 | 100 95) 162-920) 690) Wh22820 886 Ne2s71| oS |) 2-60 | eid
| 3.39 | 100 95 | 3.18 | 91 | 3.07 | 87 | 2.97 | 82 | 2.86 78
| 3.66 | 100 96 | 3.45 | 92 13.35 | 87 | 3.24 |. 83 | 3.14 | 79
|

| Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.05 mm.

B 15

o2 - PSYCHROMETRICAL TABLES.

Below the Freezing-Point ; the Bulb covered with a Film of Ice.

16

t— t', Difference of Wet and Dry Bulb Thermometers. |

Wet- 1

| Bulb Mean i

‘meter, | Wereeal | Me 1°.4 1°.6 1°.8 2°.0 20,2 |

ce [ete t] —) | |
grade. (ecb 0°-1. ' Rela- Rela- | Rela. Rela- Rela-
Degrees. Force of} fty- {Force of; ae Force of we Force of, ne Force of Hu \Force of in.
Vapor Vapor. | mid- | Vapor. | mid- | Vapor. | miq- | Vapor. | mid- | Vapor. | mia.
ity. ity. ity. ity. ity.

o | Millim. } Millim. Millim. Millim. Millim. Millim. { Millim. |
—35 } |
—34
—33
—32
=o
—30 :
—28
27
—26

l) -25
|| —24 0.04
23 0.006 0.09
-22 ae 0.16 0.05 | > 6
-2] : 0.23 0.12 | 13
0.007
20 0.30 0.20] 18 | 0.09 | 9
249) Ion 10.88 0.28 | 25 | 0.17] 15 | 0.07] 6
pes te eau ae (Car 0.36 | 30 | 0.26 | 21 | 0.16] 13 | 0.05 | 4
27 | eee tO. 56 0.46.| .35 | 0.35 | 26 |.0.25 | 18 | 0.15 | 11 | 0.04! ‘3
\=161| °°? | ovee 0.56 | 39 | 0.45 | 31 | 0.35 | 24] 0.25 | 16 | 0.14) ‘9
| 0.011
=I | 0.07 0.66 | 43 | 0.56 | 36 | 0.46 | 29 | 0.36 | 22 | 0.25 | 15
| -14 i § 0.58 0.78 | 46 | 0.68 | 40 | 0.58 | 38 | 0.47 | 27 | 0.37 | 21 Il
| —13 ote dulson 0.91 | 50 | 0.80 | 43 | 0.70 | 37 | 0.60 | 31 | 0.50 | 25
SI2h i oe [ide 1.04 | 53 | 0.94 | 47 | 0.84 | 41 | 0.73 | 35 | 0.63 | 30
VAT oe 1 180 1.19 | 55 | 1.09 | 50 | 0.99 | 44 | 0.88 | 39 | 0.78 | 34
0.018
=10 1.46 1.35 | 58 | 1.25) 52 | 1.15 | 47 | 1.04 | 42 | 0.91 | 38
= Ohi cee Niue gel 1.53 | 61 | 1.43 | 56 {1.83 | 51 | 1.22 | 46 | 1.12 | 41
egy Ocal iaigs 1.7363 1/1.62))-%58 (1.520454 P\1.430|-c49 7 13t | 256
Sry h cee ono Oe 1.94 | 65 | 1.83 | 61 | 1.73:| 56 | 1.63 | 52 | 1.52 | 48
='6, ft io 56 2.16 | 67 | 2.06 | 63 | 1.95 | 59 | 1.85 | 55 | 1.74 | 51 |
0.025 |
| 205 2.50 2.40 | 69 | 2.30 | 65 | 2.19 | 61 |-2.09 | 57 | 1.98 | 53
2% | P2008 Bo 76 2.65 | 70 | 2.55 | 67 | 2.45 | 63 | 2.34 | 39 | 224 | 55 ||

3. | 1:02 Tos o3 2.93 | 72 | 2.82 |. 68 | 2.72 | 65 | 2.61 | 61 | 2.51 | 58 |

2 | 030 | 33g 3.22 | 73 | 3.12 | 70 | 3.01 | 66 | 2.91 | 63 | 2.80 | 60

1) Pes tee 64 3.53 | 75 | 3.43 | 71 | 3.32 | 68 | 3.22 | 65 | 3.11 | 62 |

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.05 mm.

w me Ol

ean

Dilfer-

ence for

Wet-

Bulb M
Thermo-} vertical

meter
| Centi- each Q°.1,
| ade

Millim.

0.011
0.013
0.013
0.015

0.016

0.018
0.019
0.021
0.022

0.024

0.025
0.027
0.029
0.031

0.016

0.018
0.019
0.021
0.022

0.024

0.025
0.027
0.029
0.031

PSYCHROMETRICAL TABLES.

Below the Freezing-Point ; the Bulb covered with a Film of Ice.

t —W, Difference of Wet and Dry Bulb Thermometers.

2°.4

Rela~

Foree of re

Vapor. | mid-
ity.

Millim.
0.15 9
0.27 15
0.39 | 20
0.53 | 25
0.68 | 29
0.83 | 33
1.02 | 387
1.21 | 40
1.42 44
1.64 | 47
1.88 | 50
2.13 52
2.40 | 55
2.70 | 57
3.01

3°.6
Millim.
0.05 2
0.21 8
0.39 | 18
0.58 | 18
0-79 | 22
1.01 | 26
1.25 | 30
- 1.50 | 34
1.78 | 37
2.07 | 40
2.38 | 43

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.05 mm.

2°.6 2°,8
Rela~ Rela~
Force of, ne Force of ee
Vapor. | mid- | Vapor.) mid-
ity. ity.
Millim, Millim,
0.05 3
0.16 9 | 0.06 4
0.29 | 14 | 0.19 9
0.42 19 0.32 14
0.57 0.47 19
0.73 0.63 24
0.91 33 0.81 28
1.10 | 36 | 1.00 | 32
1.31 40 1.21 36
1.54 “ 1.43 40

1.77
2.03
2.30
2.59
2.90

1.67
1.92
2.19
2.49
2.80

17

4°.0
Millim.
0.19 6
0.38 | 11
0.59 | 16
0.81 | 20
1.04 | 24
1.30 | 28
1.57 | 32
1.86 | 35
2d 38

3°.0

| Rela-
tive
Force of, Hu-
Vapor. | mid-
ity.

Millim.

0.08 | 4
0.22 | 10
0.36 | 15:
0.52 | 20
0.70 | 24
0.90 | 28
1.11 | 32
1.33 | 36

1.57 | 40

43
2.09 | 45
2.38 | 48

1.82

Millim.

0.08
0.27
0.48
0.70

0.94
1.19
1.46
1.75
2.06

Millim.

3°02

0.11
0.26

0.42
0.60
6.79
1.00
1.22

a ed

1.46

1.71
1.99
2.28

Rela-
tive
Force of} Jyu-
Vapor. | mid-

ity.

4°.6
Millim.
0.06 2:
O27 | ae
0.49 | 12
0.73 | 16
0.98 | 20
1.25 | 24

| Rela-
tive
Hu-

mid-
ity.

PSYCHROMETRICAL TABLES.

| Wet
Bulb Mean
Thermo-} Vertical
meter. |. Differ-
Cre ence for
grade jeach 0°.1.
Degrees
° Millim.
0
1 0.03-
2 0.04
3 0.04
4 0.04
| 5 0.04
0.05
} 6 4
| 7 OAD
8 0.05
9 0.06
| 10 0.06
0.06
i 0.07
12 :
13 0.07
14 0.07
| 0.08
| 16
Ne 19 Ee
18 ;
| 19 0.10
| 90 0.10
0.11
21
22 0.12
| 23 0.12
a al
| 25 :
‘| 0.14
| 26 j
27 0.15
| 98 0.16
29 0.17
| 30 0.18
0.19
31
| 39 0.20 -
IF raps | ln 0-2!
| 33 | ose
35 0.23

Vapor.

Millim.
4.60
4.94
5.30
5.69
6.10
6.53

7.00
7.49
8.02
8.57
Oy

9.79
10.46
11.16
11.91
12.70

13.54
14.42
15.36
16.35
17.59

Relative] Force of | t1V@ [Force of

Humid- Vapor.
ity.

Millim.
100 | 4.48
100 | 4.82
100 | 5.18
100 | 5.57
100 | 5.98
100 | 6.41
100 | 6.88
100 | 7.37
100 | 7.90
100 | 8.45
100 | 9.04
100 | 9.67
100 | 10.34
100 | 11.04
100 | 11.79
100 | 12.58
100 | 13.41
100 | 14.30
100 | 15.23
100° | 16.22
100 | 17.27
100 | 18.37
100 | 19.54
100 | 20.76
100 | 22.06
100 | 23.43
100 | 24.86
100 | 26.38
100 | 27.98
100 | 29.66
100 | 31.42
100 | 33.28
100 | 35.23
100 | 37.28
100 | 39.43
109 | 41.70

u-
mid-
ity.
96
96
96
97
97
on

97
oF
97
97
97

Vapor.

Millim
4.36
4.70
5.06
5.45
5.86

6.29

6.76
43)
7.78
8.33
8.92

9.55
10.21
10.92
11.66
12.46

13.29
14.18
15.11
16.10
17.15

18-25 | °

19 41
20.64
21.94
23.30

24.74
26.26
27-85
29.53
31.30

33.15
35.11
37.16

39.31
41.58

93

7.01
7.54
8.09
8.68

9.31
9.97
10.68
11.42
12.21

13.05
13.93
14.87
15.86
16.90

18.00
19.17
20.39
21.69
23.05

24.49
26.01
27.60
29.28
30.05

32.90
34.86
36.91
39.06
41.33

, | Vapor.

4.01
4.35
4.71
5.09
5.50
5.94

6.40

6.89
89 7.42
89 7.97
90 8.56
90 9.19
90 9.85
91 | 10.56
91 | 11.30
91 | 12.09
92 | 12.93
92 | 13.81
92 | 14.75
92 | 15.73
92 | 16.78
92 | 17.88
93 | 19.04
93 | 20.27
93 | 21.57
93 | 22.93
93 | 24.37
93 | 25.88
93 | 27.48
94 | 29.16
94 | 30.92
94 | 32.78
94 | 34.73
94 | 36.78
94 | 38.93
95 | 41.20

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.06 mm,

18

Rela-
Force of | te

Millim.

u-
mid-
ity.

81
82
83
83
84
85

85
86
86
86

88

PSYCHROMETRICAL TABLES. 5D

t — t, Difference of Wet and Dry-Bulb Thermometers.

0.23

mn
>}

41.07 40.82 40.57

{
| Wet-
Bulb Mean i
| Thermo-} Vertical 1°.8 2°.0
SOT Differ-
| cana | ence or ca cee
| Degrees Force of Hui Force of ae Force of uve Force of vee Force of
Vapor. ity: Vapor. rab Vapor, are Vapor. id: Vapor. iad:
ity. i ity. ity.
O Millim. | Millim. Millim. Millim. Millim. Millim.
0 0.03 3.89 78 3.77 | ‘74 3.65 | 71 3.53 | 67 3.41 | 64
1 0.04 4.23 79 4.11 | 75 3.99 | 72 3.87 | 69 3.75 | 66
2 0.04 4.59 80 4.47 | 76 4.35 | 73 4.23 | 70 4.11 | 67
3 0.04 4.97 80 4.85 | 77 4.73 | 7A 4.61] 71 4.49 | 69
4 0.04 5.38 81 5.26 | 78 5.14} 75 5.02 | 73 4.90 | 70
5 5.82 82 5.70 | 79 5.58 | 77 5.46 | 74 5.34] 71
0.05
6 0.05 6.28 83 6.16 | 80 6.04 | 77 5.92 | '75 5.80 | 72
a 0.05 6.77 83 6.65 | 81 6.53 | 78 6.41 | 76 6.29 | 73
8 0.06 7.29 84 7.17| 81 7.05 | 79 6.93 | 76 6.81 | 74
9 0.06 7.85 84 7.73 | 82 7.61 | 80 EAD a Teal | 15
10 8.44 85 8.32 | 83 §.20 | 80 8.08 | 78 7.96 | 76
0.06
ee dill 0.07 9.07 86 8.95 | 83 8.82) 81 8.70 | 79 8.58 | 77
| 12 -0.07 9.73 86 9.61 | 84 9.49 | 82 9.37 | 80 9.25 | 78
13 0.08 10.43 86 10.31 | 84 | 10.19 | 82 | 10.07} 80 9.95 | 78
14 0.08 11.18 87 11.06 | 85 | 10.94] 85 | 10.81 | 81 | 10.69 | 79
15 11.97 87 11.85 | 85 | 11.73 | 83 | 11.60] 81 | 11.48} 80
| 0.08
| 16 0.09 12.80} 88 12.68 | 86 | 12.56 | 84 | 12.44] 82 | 12.32; 80
17 0.09 13.69 88 13.57 | 86 | 13.44 | 84 | 13.32 | 83.] 13.20] 81
18 0.10 14.62 88 14.50 | 87 | 14.38 | 85 | 14.26] 83 | 14.13] 81
19 0.11 15.61 89 15.49 | 87 | 15.87 | 85 | 15.24] 83 | 15.12) 82
ieee) 16.65 89 16.53 | 87 | 16.41 | 86 | 16.29 | 84 | 16.16 | 82
0.11
21 0:19 17.76 89 17.63 | 88 | 17.51 | 86 | 17.39 | 84 | 17.27] 83
| 22 0.12 18.92 90 18.80 | 88 | 18.67 | 86 | 18.55] 85 | 18.43] 83
| 23 ae 20.15 90 20.02 | 88 | 19.90 | 87 | 19.78 | 85 | 19.65 | 83
24 aa 21.44 90 21.32 | 88 | 21.20] 87 | 21.07 | 85 | 20.95 | 84
25 22.81 90 22.68 | 89 | 22.56 | 87 | 22.44 | 86 | 22.31 | 84
0.14
26 0.15 24.24 90 24.12 | 89 | 23.99 | 87 | 23.87] 86 | 23.75 | 85
27 0.16 25.76 91 25-63 | 89 | 25.51] 88 | 25.39 | 86 | 25.26 | 85
| 28 0.17 27.35 On 27.23 | 89 | 27.10] 88 | 26.98 | 87 | 26.86 | 85
i, 29 0.18 29.03 91 28.91 | 90 | 28.78 | 88 | 28.66 | 87 | 28.53] 85
30 30.80 91 90 | 30.55 | 89 | 30.42 | 87 | 30.30 | 86
0.19
31 0.20 32.65 91 90 | 32.40 | 89 | 32.28] 87 | 32.15] 86 5
32 0.21 34.61 91 90 | 34.36 | 89 | 34.23 | 88 | 34.11 | 86 | 33.98 | 85
33 0.92 36.66 92 90 | 36.41 | 89 | 36.28] 88 | 36.16 | 86 | 36.03 | 85
| 34 38.81 92 90 | 38.56 | 89 | 38.43 | 88 | 38.31] 87 | 38.18 | 85
|
|
|

i Se

on
oO

PSYCHROMETRICAL TABLES.

[— ee
i t — t’, Difference of Wet and Dry-Bulb Thermometers. |
i Wet- |
H Bulb Mean
ieee Vertical 2°.4 2°.8 3°44 |
meter. Ditters |
. ence for
| pat each 0°.1. > Relative Live nee live nae le
| Degrees. Force of Humid- Force of) + u- Force of Hu- Romeor u- Bore of Hu- Horegog ne
i Vapor. jy: Vapor. ae Vapor. eae Vapor. 3 Vapor. ard. Vapor. mide
ity. ity. ity. ity.
| ° Millim. | Millim. Millim. Millim Millim. Millim. Millim.
0 3.17| 58 | 3.06| 55 | 2.94| 52 | 2.82 2.70 2.58 | 44
1 | 9 | 3.51] 60 | 3.39| 57 | 3.27] 54| 3.16 3.04 2.92 | 47
2 | 9 | 3.97) 62 | 3.75| 59 | 3.63! 56] 3.51 3.39 3.28 | 49
3) -|. 90-04 ah $495:| b63-,| 4:13 | 6h | 4002) B84 <3:90 3.78 3.66 | 51
Ay aloe’ Sei F466) G5= 1 w4264i] G2) hy deal Gael aaea0 4.18 4.06 | 53
Brak ner pil i5.M0e| h6Ge A 2 4208)| 642] oasgGu Gill dea 4.62 4.50 |. 55
0.05
6 _ | 5.56] 67 | 5.44] 65 | 5.82] 63 | 5.20 5.08 4.96 | 56 |
7 | °% | 6.05! 69. | 5.93| 66 | 5.81] 64] 5.69 5.57 5.45 | 58 |
g | %% | 657| 70 | 645] 68 | 6.33| 65 | 6.21 6 09 5.97 | 59 |
9 | %% | va3| 7 | 7.01] 69 | 6.89] 67 | 6.77 6.64 6.52 |.,61
10 | 2% | 772! 72 | 7.59] 70 | 7.47/ 68 | 7.35 7.23 7.11 | 62
0.06 |
11 8.34| 73 | 8.22| 71-| 8.10] 69 | 7.98 7.86 7.74; 63 |
12 | 997 | 900] 74 | 8.88| 72 | 8.76] 70] 8.64 8.52 8.40 | 64 |
3 | 9% | oa] 75 | 9.58] 73 | 946] 71] 9.34 9.22 9.10 | 66
14 | 7 | 40.45] 75 | 10.33] 73 | 10.21 | 72 | 10.08 9.96 9.81 | 67 |
is | 8 | az24} 76 | 11.12! 74 | 10.99 | 72 | 10.87 10.75 10.63 | 67
0.08 |
16 | 9 | 1207) 77 | 11.95] 75 | 11.83) 73 | 11.71 11.58 11.46 | 68
17 “1 42.95| 77 | 12.831 76 | 12.71 | 74 | 12.59 12.47 12.34 | 69 |
18 13.89| 78 | 13.77] 76 | 13.64] 75 | 13.52 13.40 13.28 | 70 |
19 | jig | M87] 78 | 14-75 | 77 | 14.63 | 75 | 14.51 14.38 14.26 | 71 |
20 15.92] 79 | 15.79] 77 | 15.67| 76 | 15.55 15.43 15.30 | 72 |
0.11
21 | io | 17202] 80 | 16.90) 78 | 16.77] 77 | 16.65 16.53 16.40 | 72 |
| 22 | gig | 1838] 80 | 18.06] 79 } 17.98 | 77 | 17.81 17.69 17.56 | 73
23 ie 19.41 | 80 | 19.28] 79 | 19.16] 78 | 19.04 18.91 18.79 | 73 |
| 24 | 9, | 20.70] 81 | 20.58 | 79 | 20.45 | 78 | 20.33 20.21 20.08 | 74 |
25 ; 22.06 | 81 | 21.94] 80 | 21.82] 79 | 21.69 | 21.57 21.45 | 75
0.14
| 26 | iis | 23:50) 82 | 23:37| 80 | 23.25 | 79 | 23.18 23.00 22.88 | 75 |
27 ah 25.010) 182. | 23.891] Si |) 24876 | 79) | 24.64 24.51 24.39 | 76
| 28 | ouq | 26:61] 83 | 26.48 | 81 | 26.36] 80 | 26.23 26.11 25.98 | 76
29 | Jig | 28:28] 83 | 28-16] 81 | 28.03 80 | 27.91 27.69 27.76 | 76
| 30 30.05 | 83 | 29.92] 82 | 29.80] 81 | 29.67 29.55 29.42 | 77
| 0.19
| 31 | 99 | 31:90] 83 | 31.78 |-82 | 31.65] 81 | 31.53 31.40 31.28 | 77 |
32 | yo | 33-86] 84 | 33.73 | 82 | 33.61 |. 81 | 33.48 23.36 33.23 | 78 |
| 33 | 55 | 35.90] 84 | 35.7] 83 | 35.65 | 81 | 35.52 35.40 35.27 | 78 |
| 34 | 03 | 38:06] 84 | 37-93 | 83 | 37.81 | 82 | 37.68 37.56 37.43 | 78 |
35 40.31 | 84 | 40.18 | 83 | 40.06 | 82 | 39.93 39.81 39.68 | 79
| Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.06 mm. |
——__— = — —

20

PSYCHROMETRICAL TABLES. 5G

t —t’, Difference of Wet and Dry-Bulb Thermometers.
pact Mean
Thermo-} Vertical 3°.6 4°.4
meter: | Differ-
sal eet : Rela- Rela- Rela-
Degrees. Force of Belatixe Force of Force of | live Force of re Force of Hae Force of Ha.
Vapor. a Vapor. Vapor 3 Vapor. ade Vapor. Srv
ity. ity.
| oO Millim. | Millim. Millim. Millim. Millim.
0 0.03 2.46 41 2.11} 34 1.99 | 32 1.87 | 29
1 0.04 2.80 44 2.44) 37 2.32 | 35 2.20 | 32
2 0.04 3.16 46 2.80 | 39 2.68 | 37 2.56 | 35
3 0.04 3.54 49 3.18 | 42 3.06 | 40 2.94 | 38
4 0.04 3.94 51 3.59 | 44 3.47 | 42 3.35 | 40
5 4.38 52 4.02 | 46 3.90 | 44 3.78 | 42
0.05
6 0.05 4.84 54 4.48 | 48 4.36 | 46 4.24] 44
7 0.05 5.33 56 4.97 | 50 4.85 | 48 4.73 | 46
8 0.06 5.85 57 5.49 | 52 5.37 | 50 5.25 | 48
9 0.06 6.40 59 6.04 | 53 5.92 | 52 5.80} 50
10 6.99 60 6.63 | 55 6.51 | 53 6.39 | 52
0.06
11 0.07 7.61 61 edlioaleoo WeOL 53
12 ae 8.28 ; 62 7.79 | 56 7.6% | 55
13 0.07 8.98 64 8.49 | 57 8.37 | 56
14 0.08 9.72 65 9.23 | 59 9.11 | 57
15 10.51 66 10.02 | 60 9.90 | 58
0.08
16 0.09 11.34 67 10-85 | 61 | 10.73 | 59
17 0.09 12.22 68 11-73 | 62 | 11.61] 61
18 0.10 13.15 69 12.66 | 63 | 12.54 | 62
19 0.11 14.14 69 13-65 | 64 | 13.53 | 62
20 15.18 70 14.69 | 65 | 14.57 | 63
0.11
21 0.12 16.28 71 15-79 | 65 | 15.67 | 64
22 0.12 17.44 71 16-95 | 66 | 16.83 | 65
23 0.13 | 18:67| 72 18-17 | 67 | 18.05 | 66 |
24 0.14 19.96 73 19.46 | 68 | 19.34 | 66
25 21.32 73 20-83 | 68 | 20.70 | 67
0.14
26 0.15 22.75 74 22.26 | 69 | 22.13 | 68
| Beha) tal | 2avamh 74 23.77 | 70 | 23.64 | 68
; 28 0.17 25.86 75 25.3 70 | 25.24 | 69
| 29 nig: | 2ta4 |: 75 27.04 | 71 | 26.91 | 70
| 30 : 29.30 | 76 28.80 | 71 | 28.67 | 70
0.19
| 31 0.20 31.15 76 30.65 | 72 | 30.53 | 71 ,
32 0.21 33.10 aa 32.60 | 72 | 32.47 |- 71
33 0.22 35.15 77 34.65! 73 | 34.52 | 72
34 0.93 37.30 17 37.17 | 76 | 37.05 | 75 | 36.92 | 74 | 36.80 | 73 | 36.67 | 72
55 - 39.56 | 78 39.43 | 77 139.31 | 76 | 39.18 | 74 | 39.06 | 73 | 38.93 | 72
Mean Horizontal Difference of Force of Vapor for each 0°.1 =0.06 mm.
a Se

iB 2]

58 PSYCHROMETRICAL TABLES.

= {
t — t, Diflerence of Wet and Dry-Bulb Thermometers.
Wet- eed
Bulb Mean
Thermo-} Vertical 4.8 5°.0 5°.2 5°.4 5°.6 5.8 |!
meter. | Differ- {
| ee ence for iS eae = |. Seen Sree |
ll) “crade Jeach 02.1. k Rela- Rela- Rela- Rela- Rela- |:
|| Degrees. Force of |RelativelForce of | “iV [Force of | UY [Force of} ti¥e | Force of | Ue |Force of | tive
Vapor. tae Vapor. | 4. | Vapor: | ia. Vapor. mid. Vapor. nid. Vapor. ES |
1 ° Millim. | Millim. Millim. Millim. Millim. Millim. Millim. |
0 0.03 1.75 ii 1.63 | 25 1.51 | 23 1.39 | 21 1.27 | 19 1.15 | 17 |l
1 ae 2.08 30 1.97 | 28 1.85 | 26 1.73 | 24 61s |22 1.49 | 20 |l
2, ala 2.44 33 2.32 | 31 2.20 | 29 2.08 | 27 1.96 | 25 | 1.85] 23 |
|| 3 0.04 2.82 36 2.70 | 34 2.58 | 32 2.46 | 30 2.34 | 28 2.22 | 26
4 0.04 3.23 38 3.11 | 36 2.99 | 34 2.87 | 33 2.75 | 31 2.63 | 29 |
5 ; 3.66 40 3.54 | 39 3.42 | 37 3.30 | 35 3.18 | 33 3.06 | 32 |I
0.05 |
6 0.05 4.12 43 4.00 | 41 3.88 | 39 3.76 | 37 3.64 | 36 3.52 | 34 ||
TV os | 461] 45 | 449) 48 P4874 4d |) 4.25 11400) 94-13%) 38) OL BG |
8 0.06 5.13 47 5.01) 45 | 4.89 | 43 4.77 | 42 4.65 | 40 4.53 | 39 |
| 9 0.06 5.68 48 5.56 | 47 5.44 | 45 5.32 | 44 5.20 | 42 5.08 | 41 ||
10 6.27 50 6.15 | 48 6.02 | 47 5.90 | 45 5.78 | 44 5.66 | 42 II
0.06 \
11 0.07 | 9:89] 52 | 677 | 50] 6.65) 49 | 6.53) 47 6.40 | 46 | 6.28] 44 |
12 0.07 7.55 53 7.43 | 52 7.31 | 50 7.18 | 49 7.06 | 47 6.94 | 46
13 | jor | 8:25) 55 | 813] 58] 8.01] 52] 7.88) 50] 7.76) 49 | 7.61] 47 |
14 0.08 8.99 56 8.87 | 54 8.75 | 53 8.62 | 51 8.50 | 50 8.38 | 49
| 615 9.78 57 9.65 | 55 9.53 | 54 9.41 | 53 S29 T ol 9.17} 50
0.08
16 0.09 10.61 58 10.49 | 57 | 10.36 | 55 | 10.24] 54 | 10.12 | 53 | 10.00) 51
17 0.09 11.49 59 11.37 | 58 | 11.24] 56 | 11.12] 55 | 11.00] 54 | 10.88 | 53
| 18 0.10 12.42 60 12.30 | 59 | 12.17] 58 | 12.05 | 56 | 11.93 | 55 | 11.81] 54
| 19 0.11 13.40 61 13.28 | 60 | 13.16 | 59 | 13.04] 57 | 12.91 | 56 | 12.79 | 55
i 520 F 14.44 62 14.32 | 61 | 14.20] 60 | 14.08] 58 | 13.95 | 57 | 13.83 | 56
0.11
21 0.12 15.54 63 15.42 | 62 | 15.30| 60 | 15.17] 59 | 15.05 | 58 | 14.93 | 57 ||
| 22 0.12 16.70 64 16.58 | 63 | 16.46 | 61 | 16.33 | 60 | 16.21 | 59 | 16.09 | 58 |
|| 23 0.13 17.93 65 17.80 | 63 | 17.68 | 62 | 17.56 | 61 | 17.43 | 60 | 17.31 | 59 |
Hh ae 0.14 19 s22 65 19.09 | 64 | 18.97 5 | 18.85 | 62 | 18.72 | 61 | 18.60 | 60
25 20.58 66 20.46 | 65 | 20.33 | 64 | 20.21] 638 | 20-08} 62 | 19.96] 60
0.14
1 26 0.15 22.01 67 21.88 | 65 | 21.76 | 64 | 21.63 | 63 | 21.51 | 62 | 21.39) 61
| 27 0.16 23.52 67 23.40 | 66 | 23.27] 65 | 23.15 | 64 | 23.02 | 63 | 22.90] 62
2828 0.17 25.14 68 24.99 | 67 | 24.86! 66 | 24.74 | 65 | 24.61 | 64 | 24.49 | 63
29 0.18 26.79 68 26.66 | 67 | 26.54] 66 | 26.41] 65 | 26.29) 64 | 26.16 | 63
|| 380 28.55 69 28.42 | 68 | 28.30] 67 | 28.17] 66 | 28.05} 65 | 27.92 | 64
| 0.19
| 31 i. 0.20 30.40 70 30.28 | 69 | 30.15 | 68 | 30.03 | 67 | 29.90 | 66 29.78 | 65 |
| *32 Oo 32.35 70 32.22 | 69 | 32.10) 68 | 31.97 | 67 | 31.85 | 66 , 31.72 | 65
33 0.99 34.40 71 34.27 | 70 | 34.15] 69 | 34.02] 68 | 33.90 | 67 | 33.77 | 66
34 36.55 al 36.42 | 7 36.30 | 69 | 36.17] 68 | 36.05 | 67 | 35.92 | 66
35 38.80 7i 38.68 | 70

|
l

|

1 0.23
|

1 Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.06 mm.
|

B 22

PSYCHROMETRICAL TABLES.

‘

t — t’, Difference of Wet and Dry-Bulb Thermometers.

59

| Wet-
{| Bulb | Mean
jj Thermo] Vertical | §°,0 6.2 6.4 6.6
| meter. | Ditfer-
Pee oes Rela- Rela- Rela.
'| Degrees. Force of ea Force of ce Force of ove Force of He
Vapor. ey Vapor. | iq. | Vapor Sa Vapor. | ia.
ity. ity. ity.
O° Millim. | Millim. Millim. Millim. Millim.
0 0.03 1.04 15 02923) 13 0.80} 11 0.68 9
1 0.04 1.37 18 1.25 | 16 MES) lS OW | 3
2 0.04 1.73 22 1.61 | 20 1.49 | 18 1.37 | 16
2 0.04 2.11 2 1.99 | 23 1.87 | 21 1275))) 19)
4 0.04 2.51 28 2.39 | 26 DD in| ced: 2.15 | 23
5 2.94 30 2.82 | 28 2.70 | 27 2.58 | 25
0.05
6 0.05 3.40 33 3.28 | 351 3.16 | 29 3.04 | 28
% 0.05 3.89 35 3.77 | 33 3.65 | 32 3.53 | 30
8 6.06 4.41 37 4.28 | 35 4.16 | 34 4.04 | 33
9 0.06 4.96 39 4.84) 38 4.71 | 36 4.59 | 35
10 5.54 41 5.42 | 40 5.30 | 38 5.18 | 37
0.06
11 0.07 6.16 43 6.04 | 41 5.92 | 40 5.80 | 39
12 0.07 6.82 44 6.70 | 43 6.58 | 42 6.46 | 41
13 0.07 7.52 46 7.40 | 45 7.28 | 43 7.16 | 42
14 0.08 8.26 47 8.14 | 46 8.02 | 45 7.90 | 44
15 9.05 49 8.92 | 48 8.80 | 46 8.68 | 45
0.08
16: 0.09 9.88 50 9.75 | 49 9.63 | 48 9.51 | 47
17 0.09 10.76 52 10.63 | 50 | 10.51 | 49 | 10.39 |} 48
18 0.10 11.69 53 11.56 | 51 | 11.44} 50 | 11.32] 49
| 19 0.11 12.67 54 12.55 | 53 | 12.42 | 51 | 12.30] 50
20 13.71 55 13.58 | 54 | 13.46 | 53 | 13.34 | 52
0.11
21 0.12 14.81 56 14-68 | 55 | 14.56 | 54 | 14.44] 53
22 0.12 15.96 i 15.84 | 56 | 15.72 | 55 | 15.59 | 54
23 0.13 17.19 58 17.06 | 57 | 16.94 | 56 | 16.82 | 55
24 0.14 18.48 59 18.35 | 58.] 18.23 | 56 | 18.11 | 55
| 25 19.84 59 19.71 | 58 | 19.59 | 57 | 19.46 | 56
| 0.14
26 | 415 | 21-26] 60 | 21.14) 59 | 21.01] 58 | 20.89 | 57
| ill 0.16 22.77 61 22.65 | 60 | 22.52 | 59 | 22.40] 58
| 28 0.17 24.36 62 24.24 | 61 | 24.11 | 60 | 23.99 | 59
| 29 0.18 26.04 62 25.91 | 61 | 25.79 | 60 | 25.66 | 59
| 30 27.80 63 27.67 | 62 | 27.55 | 61 | 27.42 | 60
0.19
nO] 0.20 29.65 64 29.53 | 63 | 29.40 | 62 | 29.28 | 61
32 0.21 31.59 64 31.47 | 63 | 31.34 | 62 | 31.22] 61
33.64 65 33.51 | 64 | 33.39 | 63 | 33.26 | 62
|!

6°.8

Force of
Vapor.

Millim.
0.56
0.89
1.25
1.63
2.03
2.46

2.92
3.41
3.92
4-47
5.06

5.68
6.34
7.03
7.77
8.56

9.39
10.27
11.20
12.18
13.22

14.31
15.47
16.69
17.98
19.34

20.77
22.28
23.86
25.54
27.30

29.15
31.09
33.14

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.06 mm,

23

18
21
24

26
29
31
33
35

7.0

Rela-

Force of | tive

Vapor.

Hu-
mid-
ity.

Millim.
0.44 6
0.78
1.13
1.51
1.91
2.04

2.80
3.29
3.80
4.35 | 32
4.94

5.56
6.22
6.91
7.65
8.44

9.27
10.14
11.07
12.06
13.09

14.19
15.35
16.57
17.86 | 53
19.22

20.64 | 55
22.15 | 56
23.74 | 57
25.41 | 57
27.17 | 58

29.03
30.97
33.01

60
ea
Wet-
Bulb | Mean
| Thermo-} Vertical
meter Dilfer:
aha ence for
grade feach 99.1.
Degrees.
\ ce
° Millim.
| 9
alee
leer ehh cu
3
4 0.04
5 0.04
0.05
S 0.05
q
8 0.05
9 0.06
10 0.06
0.06
il
12 0.07
| 13 0.07
Jac |e
| 15
0.08
se 0.09
Net ano
i 618 j
19 0.10
20 0.10
0.11
zl 0.12
22 S
23 0.12
24 0.13
25 0.14
0.14
0.15
0.16
0.17
0.18
0.19
0.20

2 FA

Rela-
Force of peter Force of} ive
Vapor. ity. Vapor, Bae
ity.

Millim. Millim.
0.32 4 0.20 3
0.66 8 0.54 7
1.01} 12 0.89 | 10
1.39 15 1.27] 138
1.79 18 1.67 | 16
2.22 21 2.10} 19
2.78 24 2.66 | 23
3.16 26 3.04] 25
3.68 29 3.56 | 27
4,23 3l 4.11] 30
4.82 33 4.70 | 32
5.44 35 5.82 | -34
6.09 37 5.97 | 36
6.79 39 6.67 | 37
7.53 40 7.41] 39
8.31 42 8.19} 41
9.14] .48 9.02 | 42
10.02 45 9.90 | 44
10.95 46 10.83 | 45
11.93 AT 11.81] 46
12.97 48 12.85 | 47
14.07 50 13.94 | 49
15.22 51 1510] 50
16.45 52 16.32 | 51
17.73 52 17.61 | 52
19.09 53 18.97 | 52
20.52 54 20.39 | 53
22.03 55 21.90 | 54
23.61 55 23.49 | 54
25.29 56 25.16) 55
27.05 57 26.92 | 56
28.90 58 28.78 | 57

30.85

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.06 mm.

PSYCHROMETRICAL TABLES.

a eee
7 a

t — t’, Difference of Wet and Dry-Bulb Thermometers.

7°.6 7°.8
Rela- Rela-

Force of rae Force of the Force of
Vapor. aaa Vapor. La Vapor.
ity. ity.
Millim Millim. Millim.

0.09 1

0.42 5 0.30 4 0.18
0.77 9 0.65 7 0.53
1.15] 12 1.03} 11 0.91
1.55 | 15 1.43 | 14 1.31
1.98 ; 18 1.86 | 17 1.74
2.44] 21 Dso2i) 20

2.92 | 24 2.80 | 22

3.44] 26.) 3.82) 25

3.99 | 28 3.87 | 27

4.57 | 30 4.45 | 29

5.19 | 32 5.07] 31

5.85 | 34 5.73 | 33

6.55 | 36 6.48 | 35

7.29 | 38 Gol | Sv

8.07 | 40 7.95 | 39

8.90 | 41 8.78 | 40

9.78 | 43 9.66 | 42

10.71 | 44 | 10.58 | 438

11.69 | 45 | 11.56] 44

12.72 | 46 | 12.60) 45

13.82 | 48 | 13.70 | 47 ab
14.98 | 49 | 14.85] 48 | 14.73
16.20 | 50 | 16.08 |} 49 | 15.95
17.49 | 51 | 17.36 | 50 | 17.24
18.85 | 52 | 18.72 | 51 | 18.60
20.27 | 52 | 20.14] 51 | 20.02
21.78 | 53 | 21.65 | 52) | 21.53
23.36 | 53 | 23.24] 58 | 23.11
25.04] 54 | 24.91 | 54 | 24.79
26.80 | 55 | 26.67 | 55 | 26.55
28.65 | 56 | 28.53 55 | 28.40

30.72

30.60

an

live

Force of
Vapor.

Millim.

0.06
0.41
0.79
1.19
1.62

2.08
2.56
3.08
3.63
4.21

4.83
5.49
6.18
6.92
7.71

8.53
9.41
10.34
11.32
12.36

13.45
14.61
15.83
17.12
18.47

19.90
21.4]
22.99
24.66
26.42

28.27

$°.2

Rela-
tive
Hu-
mid-
ity.

e

|

61

PSYCHROMETRICAL TABLES.

t—t’, Difference of Wet and Dry-Bulb Thermometers,

| Meo

Thermo-} Vertical

s8°.4 8°.6 9°.2 9°.4

ea Differ-
Centi- | ence for
a eat Force of | Relative | Force of ‘ve Ranceton uve
ity. ity.
o | Millim. | Millim Millim. Millim. ,
0
1 |
2 Pe
3 a 0.67 7 0.55] 5 0.08} 1 |
4 0.04 1.07 10 0.95 9 0.48 4 |
5 1.50 13 1.38 | 12 0.90 U I
0.03
6 0.05 1.96 16 1.84 | 15 1.36 | 10
a 0.05 2.44 19 Deon | aa 1.84 | 13
8 0.06 2.96 21 2.84 | 20 2.36 | 16
9 0.06 3.51 ee 3.39 | 23 2.91 | 18
10 4.09 26 Sieh 2D 3.49 | 21
0.06
1] 0.07 4.71 28 4.59 | 27 4.11 | 23
12 0.07 Decal 30 5.25 | 29 4.76 | 25
13 0.07 6.06 32 5.914) 31 5.46 | 27
14 0.08 6.80 34 6.68 | 33 6.19 | 29
15 7.58 35 WetGi| ot 6.97 | 31
0.08
16 0.09 8.41 37 8.29 | 36 7.80 | 32 ||
17 0.09 9.29 3 Ok7 | 38 8.68 | 34
18 0.10 10.22 40 10.09 | 39 9.60 | 35
19 oan 112200|" 408 | 11-07 | 40 10.58 | 37
20 12.23 43 12.11 | 42 11.62 | 38
0.11
21 0.12 13.33 44 P20, 45 12.71 | 40
22 0.12 14.48 45 14.36 | 44 13.87 | Al
23 0.13 15.71 46 15.58 | +45 15.09 | 42
oH 0.14 16.99 AT 16.87 | 46 16.37 | 43
H 625 18.35 48 18.22 | 47 17.73 | 44
| 0.14
| 26 0.15 19.77 49 19.65 | 48 19.15 | 45
27 0.16 | 22-28 50 | 21.16] 49 20.66 | 46
28 0.17 22.86 51 Pee OO 22.24 | 47
29 0.18 24.54 Sill 24.41 | 51 23.91 | 47 |
30 26.30 52 26010 |i 25.67 | 48
0.19 |
28.16 |
|

25

.

62 PSYCHROMETRICAL TABLES.

——$______— 2

t — t’, Difference of Wet and Dry-Bulb Thermometers.

ae Mean
Thermo-] Vertical 9°.6 10°.0 10°.2 10°.4 10°.6
meter. | Differ-
pat ae sae : : Rela- Rela- Rela- Rela- Rela-
| Degrees. Force of Beialive Force of ihe Force of ie Force of He Force of "Ve | Force of He
| Vapor. ity: Vapor. mid- Vapor. mid- Vapor. mid- Vapor. mid- Vapor. mid.
| ity. ity. ity. ity. ig
| Oo Millim. | Millim. Millim. Millim. Millim. Millim. Millim.
0
1
2
3
4
fe
} 0.05
6 -
7 ue
8 0.05
9 0.06
10 0.06
0.06
eet
12 0.07
13 0.07
14 ot
15 0.08
| 0.08
16
17 0.09
18 0.09
19 0.10
20 0.11
0.11
21
| 99 0.12
93 0.12
toy 0.13
25 0.14
0.14
2g 0.15
| a Ab
28 s
| 29 0.17
| 30 0.18
| 31
32
| 33
34
35

| Mean Horizontal Difference of Furce of Vapor for each 0°.1 = 0.06 mm.

li sada seat =

B 26

——

a

PSYCHROMETRICAL TABLES. 63

Mean

-| Vertical 10°.8
Differ-

11°.0 1L°.2

ence for
each 0°. 1, : e Rela- ;
Degrees. Force of Relae Force of He Force of He Force of He i
VeHCE: ity. VeBOr mid- Wego mid- vane mid- vee mid-
ity. ity. ity. ity.
Millim. | Millim. Millim. Millim. Millim. Millim
0.40 2
0.91 5
1.46 8
2.04] 11
2.65 | 13
3.31] 15
4.00} 17
4.73 | 19
5.51} 21
il
6.34 | 22
Wooo mod
8.14} 26
9.11 | 28
10.15 | 29 |
11.24] 30 |i
12.39 | 32 |
13.61 | 33 |
14.90 | 34
16.24 | 35 |
17.66 | 36
19.17 | 37
20.75 | 38
|

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.06 mm.

B 27

Wet- Mean
Thermo-} Vertical
meter. | Differ-
Centi- | &Ce for
grade each U°.1.
Degrees.
° Millim.
12
| 43 0.07
a 0.07
15 0.08
ZTE EO;08
16
0.09
7 | 04g
19 0.10
20 0.10
21 0.11
0.12
92°
cs 0.12
an 0.13
| oe 0.14
PL enos14
' 26
0.13
aU 0.16
28
2
eT e007
13
0.07
14 | 0.08
1S 0.08
16
0.09
at 110/09
IST Hicos16
os 0.10
a 0.11
21
0.12
2”
- 0.12
a 0.13
On 0.14
2 0.14
| 26

Ss e
Force of | Relative! Porce of | UVe [Force of

PSYCHROMETRICAL TABLES.

t—U, Difference of Wet and Dry-Bulb Thermometers.

Vapor. Humid-
ity.
Millim.
3.19 14
3.88 16
4.61 18
5.39 20
6.22 22
7.09 24
8.01 25
8.99 27
10.02 28
11.12 30
12.27 31
13.48 32
14.78 33
16.11 35
17.54 36
19.04 37
38

20.63

Millim.

2.46
3.15
3.88
4.66
5.48

6.36
7.28
8.25
9.29
10.38

11.53
12.74
14.02
15.37
16.80

Tlu-

mid-
ity.

Millim.

3.06 | 14
3.76 | 16
4.49 | 18
5.27 | 20
6.09 | 21

6.97

7.89 | 25
8.87 | 26
10.90 | 28
10.99 | 29

12.14} 30
13.36 | 31
14.65 | 33
15.99 | 34
17.42 | 35

18.92

Vapor.

Millim.

12°.8
Rela-
live
Te Hu-
mid- Me mid-
ity. ity.
Millim.
2.70) 12
3.39 | 14
4.13 | 16
4.90 | 18
5.73 | 19
6.60 | 21
7.52) 23
§.50 | 25
9.53 | 26
10.62 | 27
11.77 | 28
12.99. | 29
14.28 | 31
15.62 | 32
17.04 | 33
18.55 | 34

13°.4

Millim.
2.34} 10
3-03 | 12
3.76 | 14
4.54 | 16
5.36 | 18
6:23)|19
7.16} 21
8.13 | 22
9.16 | 24
10.25 | 25
11.40 | 27
12.62 | 28
13.90 | 29
WD5e2DuRS
16.67 | 31

Millim.
2.22
2.91
3.64
4.42
5.24

6.11
7.03
8.01
9.04
10.13

11.28
12.49
Seria
15.12
16.55

Millim.

2.09
2.79
3-52
4.29
5.12

5.99
6.91
7.89
8.92
10.01

11.16
12.37
13.65
15.00
16.42

Millim.

8 1.97
11 2.66
13 3.40
15 4.17
16 5.00
18 5.87
20 | 6.79
21 7.76
23 8.80
24 9.89
26 | 11.03
27 | 12.25
28 | 13.53
29 | 14.88
30 | 16.30

14°.0

10
12
14
16

yd,
19
21
22
24

27
29
30

Force of
Vapor.

Millim.
2.58
3.27
4.00
4.78
5.61

6.48
7.40
8.38
9.41

10.50

11.65
12.86
14.16
15.50
16.92

18.42

Millim

21
22
24
25
27

28
29
30
31
33

34

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.06 mm.

28

PSYC HROMETRICAL TABLES. 65

Correc ‘ion for the Barometrical Height.

Difference of Thermometers t — t/.

cm

Wet-Bulb above the Freezing Point.

For the
Barometrical
Height below.

3° | & a 12°) 93°| 94s

|
: Add. |Subtr’ct.

Millim. | Millim. || Milli.| Miui.| Mili. | Milli. | Mini. | Mini.| Mini.) Mini.|Mini.! Mini. | Mini. | Mini. | mini. | Mini.

755 | 755 || 0.00) 0.00} 0.00} 0.00} 0.00] 0.00! 0.00! 0.00] 0.00/ 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |,
750 | 760 ||0.00| 0.01) 0.01] 0.02/ 0.02] 0.02) 0.03] 0.03| 0.04) 0.04 | 0.04 | 0.05 | 0.05 | 0.06
745 | 765 ||0.01) 0.02! 0.02] 0.03] 0.04| 0.05] 0.06| 0.06 0.07/ 0.08 | 0.09 | 0.10 | 0.10 | 0.11
740 | 770. ||0.01| 0.02| 0.04/ 0.03] 0.06/0.07| 0.08| 0.10] 0.11] 0.12 | 0.13 | 0.14 | 0.16 | 0.17
735 | 775 ||0.02| 0.03] 0.05] 0.06/ 0.08] 0.10] 0.11/ 0.13] 0.14] 0.16 | 0.18 | 0.19 | 0.21 | 0.22

725 785 ||0.02/ 0.05) 0.07) 0.10) 0.12] 0.14] 0.17 0.19} 0.22] 0.24 | 0.26 | 0.29 | 0.31 | 0.34
720 790 |/0.03/ 0.06) 0.08) 0.11] 0.14] 0.17) 0.20) 0.22) 0.25] 0.28 | 0.31 | 0.34 | 0.36 | 0.39
715 795 || 0.03) 0.06| 0.10) 0.13] 0.16] 0.19) 0.22) 0.26] 0.29} 0.32 | 0.35 | 0.38 | 0.42 | 0.45
710 800 ||0-04' 0.07) 0.11) 0.14) 0.18} 0.22} 0.25) 0.29] 0.32) 0.36 | 0.40 | 0.43 | 0.47 | 0.50

730 | 780 ||0.02| 0.04! 0.06) 0.08/ 0.10] 0.12! 0.14! 0.16/ 0.18] 0.20 | 0.22 | 0.24 | 0.26 | 0.28

700 co 0.04) 0.09) 0.13) 0.18) 0.22} 0.26] 0.31] 0.35] 0.40; 0.44 | 0.48 | 0.53 | 0.57 | 0.62
690 ee 0.05] 0-10} 0.16] 0.21) 0.26] 0.31] 0.36] 0.42) 0.47] 0.52 | 0.57 | 0.62 | 0.68 | 0.73
680 Le 0.06} 0.12) 0.18} 0.24| 0.30) 0.36] 0.42) 0.48] 0.54) 0.60 | 0.66 | 0.72 | 0.78 | 0.84
670 &h 0.07) 0.14] 0.20) 0.27/ 0.34| 0.41] 0.48] 0.54! 0.61] 0.68 | 0.75 | 0.82 | 0.88 | 0 95
660 ce 0.08) 0.15) 0.23) 0.30) 0.38) 0.46) 0.53) 0.61| 0.68| 0.76 | 0 84 | 0.91 | 0.99 | 1.06

650 $6 0.08) 0.17| 0.25) 0.34/ 0.42 sail sik 0.67| 0.76] 0.84 | 0.92 | 1.01 | 1.09 | 1.18

Freezing Point.

EXAMPLE OF CALCULATION.

5 : 0.00! 0.00) 0.00! 0.00] 0.00 |
i a 0 aa 0.01| 0.01] 0.01] 0.02 Wet-bulb above the Freezing Point.
5 : : ; i
745 765 ||0.01/0.01| 0.02: 0.03] 0.04 t—.0 t—t! = 8°.2. h = 710™™
740 770 |/0.01) 0.02! 0.03] 0.04! 0.05 The tables give for mean barometrical mm.
735 775 ||0.01/| 0.03) 0.04| 0.06} 0.07] height 755"™- Force of vapor. . = 9.4)
Additive correction for 710™- and 8°.2 = 0.30 |)

.02| 0.04} 0.05] 0.07] 0.09
Bee see) abe O06 Force of vapor : aria

|
'
| Wet-bulb below the

| 725 785 ||0.02/0.04| 0.06) 0.08) 0.11
| 720 790 ||0.02/0.05)| 0.07| 0.10} 0.12

715 | 795 ||0.03) 0.06) 0.08/ 0.11) 0.14 The mean barometrical pressure, at a given
| 710 | 800 ||0.03) 0.06) 0.09) 0.13) 0.16 place, being known, it is easy to make the above
| Psychrometrical Tables fitted for that place, by
|

700 ** |/0.04) 0.08) 0.12) 0.15) 0.19] determining, by means of this last table, a constant |
690 *¢ ||0.05] 0.09] 0.14] 0.18) 0.23] correction, to be applied to the numbers in the ta-
680 * |/0.05] 0.11) 0.16| 0.21) 0.26) bles, giving the force of vapor. This correction
670 re 0.06) 0.12) 0.18) 0.24) 0.30) will be found by taking for ¢ —?/, or the difference
660 ** ||0.07/ 0.13] 0.20) 6.27) 0.33) og thermometers, a mean value, the deviations of
which will have little influence upon the accuracy
of the results.

650 | “ 10.07] 0.15] 0.22] 0.29] 0.36
|
B 29

igs
(oe

66

rir,

OA Bik

GIVING AT SIGHT THE RELATIVE HUMIDITY DEDUCED FROM THE INDICAs
TIONS OF THE DEW POINT INSTRUMENTS.

By M. T. HarcGuens.

Tuts table, which has been published in the Annuaire Météorologique de France
for 1850, page 86, and following, has been calculated by Mr. Haeghens, using
Regnault’s Tables of Elastic Forces of Vapor. It gives directly the relative humidity
when the hygrometrical observations have been made by means of dew point instru-
ments like those of Daniell, Regnault, Bache, and others.

These hygrometers are destined to find out the temperature of the dew point, that
is the temperature to which it would be necessary to lower the temperature of the
air, in order that this air be completely saturated by the aqueous vapor which it con-
tained at the time of the observation.

The force of vapor contained in the air, or its absolute humidity, is thus the maxi-
mum of force of vapor which corresponds to the temperature of the dew point ; it is
given directly in the Table I. of the Elastic Forces of Vapor, by Regnault.

The ratio of that maximum of force of vapor at the temperature of the dew point
to the force of vapor which corresponds, in the same table, to the temperature of the
surrounding air at the time of the observation, is the relative humidity. ‘This ratio is
given in hundredths in the following table, which relieves the observer of the trouble
of calculating it.

Let ¢ = temperature of the air surrounding the instrument.
¢/ = temperature of the dew point.
t — t' = the difference between these two temperatures.

‘The first column, on the left, contains the temperature of the air ¢, in centigrade
degrees. The following ones, headed with the differences, ¢ — ¢/, between the
temperatures of the air and of the dew point, give the relative humidity correspond-
ing to the two elements.

Temp. of the Air =¢. Dew point = ¢!. Difference ¢ — #/. Relative Humidity.

Example: 10°.0 4°.4 5°.6 68

Should the temperature of the air ¢’, or the difference t — t’, fall between the
numbers found in the columns, it is obvious, by glancing at the table, that an inter-
polation at sight will always be easy.

B 30

III. RELATIVE HUMIDITY IN HUNDREDTHS. 67

temper] re t — t' = Ditfereuce of Temperatures of the Dew Point and of the Air.
| fe el 0. 0 0°.4 | 0°.4 | 0°.6 0°.891°.0 | 1°.2 | 19.4) 19.6) 19.89 2°.u | 9°.9 | 9°.4 | 9°.6 | 2°.
Centig. cement kA ss clees aoe Sea, iene i
—s 4 100 95 | 94 | 92 | 90 | 89 | 88 85 | 83 | 82 | 80 | 79
—7 4100 95 94 92 91 89 88 85 3 82 81 79
—§ 4100 95 | 94 F 92 91 | 89 | 88 85) |) 84 1 S2" ee 80
—5 100 95 94 92 91 89 88 85 84 82 81 80
—4{ 4 100 95 | 94 § 92 | 91 89 | 88 85 | 84 83 | 81 80
--3. 7 100 95 94 92 91 90 88 85 84 83 81 80
--2 4100 95 94 93 91 90 $8 86 84 83 82 80
ae 100 95 94 93 91 90 89 86 85 83 82 81
QO § 100 96 | 94 | 93 | 91 90 | 89 86 | 85 | 83 | 82 | 81
$1 § 100 96 | 95 # 93 | 92 | 90 | 89 86 | 85 | 84 | 83 | 81
2 4100 96h 95 93) SZ. | 91 89 Si in So |) St! || 83) | 82
3 4 100 96 | 95 | 93 | 92 | 91 89 87 | 86 | 84 83 | 82
4 9100 96 | 95 f 93 92 | 91 89 87 | 86 | 85 | 83 | 82
5 #100 96 95 93 92 91 90 87 86 85 83 82
6 4100 96 95 | 93 | 92 | 91 90 87 | 86 | 85 | 84 | 82
7 § 100 96 | 95 | 98 | 92 | 91 90 87 | 86 | 85 | 84 | 83
8 4 100 96 | 95 | 93 | 92 | 91 90 87 | 86 | 85 | 84 | 83
9 § 100 96 | 95 f 94 | 92 91 90 87 | 86 | 85 | 84 | 83
10 4 100 96 | 95 f 94 | 92 91 90 87 | 86 | 85 | 84 | 83
11 {100 96 95 94 92 91 90 87 86 85 84 83 |.
it? alow 96 | 95 f 94 | 92 91 90 88 | 87 | 85 | 84 | 83
13 4 100 96 | 95 f 94 | 92 | 91 90 88 | 87 | 85 | 84 | 83
14 4100 96 | 95 | 94 | 93 | 91 90. 88 | 87 | 86 | 84 | 83
15 § 100 96 | 95 | 94 | 93 | 91 90 88 | 87 | 86 | 84 | 83
16 4 100 96 | 95 | 94 | 93 | 91 90 88 | 87 | 86 | 85 | 84 |
17 4 100 96 95 94 93 91 90 88 87 86 85 84
18 #100 96 95 94 93 92 90 88 87 86 85 84
19 § 100 96 95 94 93 92 $1 88 87 86 85 84
20 4 100 96 | 95 f 94 | 93 | 92 | 91 88 | 87 | 86 | 85 | 84
21 4100 SGm Oa hate os) ozo 88 | 87 | 86 | 85 | 84
22 § 100 96 95 94 93 92 91 89 87 86 85 84
23 4 100 SoMa Sout 9a |) 93) 1 925 eo 89 | 88 | 86 | 85 | 84
24 § 100 Dig DOS Nees es) || 9208 OL 89.88 | 87 | 85 4) 84
25 #100 Die 9b ge 04 1930) 92) | Or 89 | 88 | 87 | 86 | 85
26 4100 97 95 94 93 92 91 89 88 87 86 85
27 § 100 97 95 94 93 92 91 89 88 87 86 85
28 § 100 emo Neos) |) 95) 92) | 98 89 | 88 | 87 | 86 | 85
29 7 100 Sea OO EOS) ele oe oz | ol 89 | 88 | 87 | 86 | 85
30 § 100 Si Ne96 8194 98) 92) | Or 89 | 88 | 87 | 86 | 85
31 4100 97/996 | 94 | 93 || 92 | OL Sones 87 | 86 | 85
32 4100 Sieg BOO ReO+ als oa) |) OL 89 | 88 | 87 | 86 | 85
33 4 100 S37 3) 196 94 793: | 992 || 9 89 | 88 | 87 | 86 | 85
34 § 100 TTS 9G eGo) || 993) | 192) | 791 89 | 88 | 87 | 86 | 85
35 4 100 97 96 95 93 92 91 89 88 87 86 85

68 RELATIVE HUMIDITY IN HUNDREDTHS.

Temper t — t’ — Difference of Temperatures of the Dew Point and of the Air. |
ature o

tne air.

t= 93°.0| 8°.2 | 3.°4 | 3°.6 | 3°.894°.0 | 4°.2 | 4°.4 | 4°.6 | 4°08 95°.0 | 5°.2 | 5°.4 | 5°.6 | 5°.8

Centig.
-8 § 78 | 77 | 75 | 74 | 73

—7 | 78 | 77 | 75 | 74 | 73
-—6 § 78 | 77 | 76 | 74 | 73
5 TO Te Gh |) De er

66 | 65 | 64 | 63
66 | 65 | 64 | 63
66 | 65 | 64 | 63

5 | 64 | 63

—4\ 5. 79) 7% |) F6r | 7on |) 74
-3 | 79 | 77 | 76 | 75 | 74
—2 | 79) | 78) |) Wa | 76" |) 74
-1 479 | 78 | 77 | 76 | 75

67 | 66 | 64 | 63
67 | 66 | 65 | 64
68 | 66 | 65 | 64
68 | 67 | 66 | 65

OO: AESOP Shs we i 06" |e 70. 68 | 67 | 66 | 65

+) § 80! | 795.) 78h | Te | 5 69 | 68 | 66 | 65

CO On| AS

2fs1 | 79 | 78 | 77 | 76 69 | 68 | 67 | 66 | 65
3 [381 | 80 | 73 | 77 | 76 70 | 69 | 68 | 66 | 65
41381 | 80 | 79 | 78 | 7 70 | 69 | 68 | 67 | 66
5 |s1 | 80 | 79 | 78 | 77 70 | 69 | 68 | 67 | 66
6 1381 | 80 | 79 | 7 | 77 71 | 70 | 69 | 68 | 67
7 1s1 | 80 | 79 | 78 | 7 71 | 70 | 69 | 68 | 67
sg [s1 | 80 | 79 | 78 | 77 71 | 70 | 69 | 68 | 67
g |s2 | so | 79 | 78 | 77 71 | 70 | 69 | 68 | 67

10 | 82 | s1 | 80 | 78 | 77 71 | 70 | 69 | 68 | 67
11 | 82 | 81 | 80 | 79 | 78 71 | 70 | 70 | 69 | 68
12 | 82 | 81 | 80 | 79 | 78 72 | 71 | 70 | 69 | 68
| 13 | 82 | 81 | 80 | 79 | 78 72 | 71 | 70 | 69 | 68
14 | 82 | 81 | 80 | 79 | 78 72 | 71 | 70 | 69 | 68

| 15 | 82 | 81 | 80 | 79 | 78 72 | 71 | 70 | 69 | 68

lie 16° S201 Sib If 80) | 79) 78 72) ||| ovat ae ez Oll69

| 17 183 | 81 | 80 | 79 | 78 73 | 72 | 71 | 70 | 69

is | s3 | s2 | 81 | 80 | 79 73 | 72 | 71 | 70 | 69
19 | s3 | 82 | 81 | 80 | 79 73 | 72 | 71 | 70 | 69
20 183 | 82 | s1 | 80 | 79 73 | 72 | 71 | 70 | 69
21 183 | 82 | s1 | 80 | 79 73-| 72 | 7 | 70 | 70
73 | 73 | 72 | 1 | 70
3 | 8: 7 | 73 | 72 | 7 | 70
| 73 | 72 | 71 | 7
74 | 73 | 72 | 1 | 70
74 | 73 | 72 | 1 | 70
7 | 73 | 72 | 1 | 70
7 | 73 | 72 | 1 | 70
~ | 74| 72) 72/7
26 | 74/723 | 72/7
~ || 23) 2/17
~ | 74 | 73 | 72 | 72
2 | 7/723 \| 721 7
7 | 74| 74 | 73 | 72 |I

RELATIVE HUMIDITY IN HUNDREDTHS.

t — t! = Difference of Temperatures of the Dew Point and of the Air.

69

70 RELATIVE HUMIDITY IN HUNDREDTHS.

Temper-
ature of
the air.

t — t’ = Difference of Temperatures of the Dew Point and of the Air.

9°.4 | 9°.6 | 9°,8 £10°,0/10°.2/10°.4 10.6] 10°.8f11°.0/11°.2/11°.4/11°.6/11°.8

2 49 | 49 | 48 | 47 | 46
3 50 | 49 | 48. | 48 1 47 | 46 | 45 | 45 | 44
4 51-1 60.1 49:| 48.0 47 4.47 | 46 |.45 |. 44
5 51 | 50 | 49 | 49,1 48 | 47 | 46 | 46 | 45
6 52 | 51 | 50 | 49 | 48 | 48 | 47 | 46 | 45
7 52.| 61 | 51 | 50.1 49 | 48 | 47 | 47 | 46
8 52:' 52-1 S1-| 50.0 491,49 1048 || 471 46
9 53 | 52 | 51 | 50.150 | 49 | 48 | 48 | 47
10 53 | 52 | 51 | 51 950 | 49 | 49 | 48 | 47
11 53 | 53 | 52.| 51950 | 50 | 49 | 48 | 48
12 54.| 58 | 52 | 51 9 51 | 50 | 49 | 49 | 48
13 54 | 53 | 52 | 52 1 51 | 50 | 50 | 49 | 48
14 54 | 53 | 53 | 52 1 51 | 50 | 50 | 49 | 48
15 54 | 54 | 53 | 52 7 51 | 51 | 50 | 49 | 49
16 55 | 54 | 53-| 52 | 52 | 51 | 50 | 50 | 49
17 55 | 54 | 53 | 58 | 52 | 51 | 51 | 50 | 49
18 55 | 54 | 54 | 53 | 52 | 51 | 51 | 50 | 49
19 55 | 55 | 54-| 53 | 52] 52 | 51 | 50 | 50
20 56 | 55 | 54 | 53 | 53 | 52 | 51 | 51 | 50
21 56 | 55 | 54.| 54.953.| 52 | 52 1951 | 50
22 56 | 55 | 55 | 54 753 | 53 | 52 | 51 | 50
23 56 | 56 | 55 | 54 153 | 53 | 52 | 51°] 51
24 57 | 56 | 55 | 54.8 54 | 53 | 52 | 52 | 51
25 57 | 56 | 55 | 55 | 54 | 53 | 53 | 52 | 51
26 57 | 56 | 56 | 55-154 | 53 | 53 | 52 | 51
27 57 | 56 | 56 | 55 | 54 | 54 | 53 | 52 | 52
28 57 | 57 | 56 | 55 | 55 | 54 | 53 | 53 | 52
29 58 | 57 | 56 | 56 | 55 | 54 | 53 | 53 | 52
i| 30 58 | 57 | 57 | 56 955 | 54 | 54 | 53 | 52
Hear 58 | 57 | 57 | 56 | 55 | 55 | 54 | 53 | 53
32 58 | 58 | 57 | 56 |] 56 | 55 | 54 | 54 | 53
33 59 | 58 | 57 | 56 |] 56 | 55 | 54 | 54 | 53

RELATIVE HUMIDITY IN. HUNDREDTHS. Tt

Temper- t — t = Difference of Temperatures of the Dew Point and of the Air. |
ae i “os |
“t=. $19°.0/12°.9/19°.4]19°,6/ 19°.8 13,0] 13°,2|13°.4) 13°.6|13°.8]14°,0}14°.9 14°.4 14°.6 14°.8 |
Centiz. |} TQ pa
—8
a4
—6
—5
—4
—3
—2
a |
0
+1
2
3
4 § 40 40 39 38 38 | 37
5 qj 41 40 | 39 39 38 | 38 37 36 36
6 q 41 41 40 39 39 | 38 37 37 36 35 34 33 33
7 | 42 41 40 40 39 | 39 38 37 37 35 34 34 33
8 4 42 42 41 40 40 | 39 38 38 37 35 35 34 34
9 9 43 42 41 41 40 7 40 39 38 38 36 35 35 34
10 § 43 43 42 41 41 | 40 | 39 39 38 36 36 35 35 ||
11 44 43 | 42 42 41 } 40 40 39 39 37 36 36 35 |
12 9 44 43 | 43 42 41 7 41 40 40 39 37 37 36 36
13 ft 44 44 43 42 42 4 41 41 40 39 38 37 37 36
14 ft 45 tt 43 43 42 | 42 41 40 40 38 37 37 36
15 9 45 44 44 43 42 7 42 41 41 40 38 38 37 37
16 f 45 44 | 44 43 43 9 42 41 41 40 39 38 38 37 |
17 § 45 45 44 43 43 | 42 42 41 41 39 38 38 37
18 jj 46 45 44 44 | 43 9 43 42 41 4] 39 39 38 38
19 § 46 45 | 45 44 43 9 43 42 42 Al 39 39 38 38
20 | 46 | 45 | 45 | 44 | 44 | 43 | 42 | 42 | 41 40 | 39 | 39 | 38 |!
21 46 46 45 45 44 9 43 43 42 42 40 39 39 38
22 9 47 46 45 45 44 9 44 43 43 A2 40 40 39 39
23 9 47 46 46 45 45 9 44 43 43 42 41 40 39 39
24 9 47 47 | 46 45 45 | 44 44 43 42 41 40 40 39
| 25 § 47 47 | 46 46 45 | 44 | 44 43 43 4] 41 40 39
26 4 48 47 | 46 46 45 | 45 Ad 44 43 41 41 40 40
27 4 48 47 | 47 46 45 9 45 44 44 43 42 41 40 40
28 § 48 48 47 46 46 | 45 45 44 44 42 41 Al 40
1 29 | 48 48 AT 47 46 fj 45 45 44 44 42 42 tl 41
30 # 49 48 47 AT 46 | 46 45 45 Ad 42 42 1 41
31 49 48 48 47 | 46 | 46 45 45 44 43 42 42 41
32 | 49 49 48 47 47 | 46 46 45 45 43 42 42 Al
33 49 49 | 48 48 47 | 46 46 45 45 43 43 42 42
34 9 50 49 | 49 48 47 | A7 46 46 45 43 43 42 42
35 ¥ 50 49 49 48 48 | 47 46 46 45 ‘

ow
wo
Or

72

AB LE IV

100
F
OF THE AIR FROM ITS ABSOLUTE HUMIDITY, GIVEN IN MILLIMETRES.

FACTOR » FOR COMPUTING THE RELATIVE HUMIDITY, OR THE DEGREE OF MOISTURE

By HAEGHENS.

Tue Relative Humidity, or the degree of moisture of the air, is the ratio of the
quantity of yapor contained in the air to the quantity it could contain at the tem-
perature observed, if fully saturated.

If we call

The force of vapor contained in the air = f,
The maximum of the force of vapor at the temperature of the air = F,
The point of saturation = 100,
we have the proportion,
Relative Humidity : 100 :: f: F,
and

a = Relative Humidity in Hundredths.

St X 100 100
ae =a Gia

But as ~ ot
=— would be reduced to a simple multiplication, if we had a

table of the factors es Such a table is obtained by dividing the constant number
100 by each number in the ‘Table of Elastic Forces of Vapor, and substituting the
quotients to the tensions.

The following Table, taken from the Annuaire Météorologique de la France, for
1850, p. 79, gives the factor a for every tenth of a degree from — 10 to + 35°
Centigrade, corresponding to the Forces of Vapor in Table I.

t is obvious that the operation indicated by the former

expression, VIZ.

Use oF tHE TABLE.

The force of vapor contained in the air being given in millimetres, multiply the
number expressing it by the factor in the table corresponding to the temperature of
the air at the time of the observation ; the result will be the Relative Humidity in
Hundredths.

Examples.
1. Suppose the temperature of the air to be = 24° Centigrade.
ss “* force of vapor in the air to be = 10.76 millimetres.
Opposite 24° is found in the table the factor 4.51.
Then 10.76 x 4.51 = 48.5, Relative Humidity in Hundredths.

2. Suppose the temperature of the air to be = 16.7.

ce ‘** force of vapor in the air to be = 12.07.
Table gives for 16.7 the factor 7.07.
Then 12.07 x 7.07 = 85.3, Relative Humidity.

B 36

FACTOR a TO COMPUTE THE RELATIVE HUMIDITY. te
= Tenths of Degrees.

Temp.

AN Oo lo Bo cilcl Ba. Be aS. | 6. | s. 9.

Centig.

0 48.1 48.5 48.9 49.3 49.7 50.1 50.5 50.9 51.4 51.8
9 44.2 44.6 45.0 45.4 45.7 46.1 46.5 46.9 47.3 47.7
8 40.7 41.1 41.4 41.7 42.1 42.4 42.8 43.1 43.5 43.9
a 37.5 37.8 38.1 38.4 38.7 39.0 39.4 39.7 40.0 40.4
6 34.6 34.9 35.2 35.4 35.7 36.0 36.3 36.6 36.9 37.2
5 31.9 32.2 32.4 32.7 33.0 33.2 33.5 33.8 34.0 34.3
4 29.5 29.8 30.0 30.2 30.5 30.7 31.0 31.2 31.4 31.7
3 27.3 27.5 27.7 27.9 28.2 28.4 28.6 28.8 oe 29.3
2 25.3 25.5 25.7 25.9 26.1 26.3 26.5 26.7 26.9 PMioM
1 23.4 23.6 23.8 24.2 24.0 24.3 24.5 24.7 24.9 25.1

—0 21.7 21.9 22.1 22.2 22.4 22.6 22.8 22.9 23.1 23.3

+0 21.7 21.6 21.4 21.3 21.1 21.0 20.8 20.7 20.5 20.4
1 20.2 20.1 20.0 19.8 19.7 19.5 19.4 19.3 19.1 19.0
2 18.9 18.7 18.6 18.5 18.3 18.2 18.1 18.0 17.8 17.7
3 17.6 17.5 17.3 17.2 17.1 17.0 16.9 16.7 16.6 16.5
4 16.4 16.3 16.2 16.1 15.9 15.8 15.7 15.6 15.5 15.4
5 15.3 15.2 15.1 15.0 14.9 14.8 14.7 14.6 14.5 14.4
6 14.3 14.2 14.1 14.0 13.9 13.8 13.7 13.6 13.5 13.4
7, 13.4 13.3 13.2 13.1 13.0 12.9 12.8 12.7 12.6 12.6
8 12.5 12.4 12.3 12.2 12.1 12.1 12.0 11.9 11.8 11.7
9 11.7 11.6 11.5 11.4 11.4 11.3 11.2 11.1 11.1 11.0

10 10.9 10.8 10.8 10.7 10.6 10.6 10.5 10.4 10.3 10.3

11 10.2 10.1 10.1 10.0 9.95 9.88 9.82 9.75 9.69 9.63
12 9.56 9.50 9.44 9.38 9.32 9.26 9.20 9.13 9.08 9.02

13 8.96 8.90 8.84 8.79 8.73 8.67 8.62 8.56 $.51 8.45

14 8.40 8.34 8.29 8.24 8.18 8.15 8.08 8.03 7.98 7.92

15 7.87 7.82 (ode Worl? 7.68 7.63 7.58 7.53 7.48 7.43

16 7.39 7.34 7.29 7.25 7.20 7.16 7.11 7.07 7.02 6.98

17 6.93 6.89 6.85 6.80 6.76 6.72 6.68 6.63 6.59 6.55

18 6.51 6.47 6.43 6.39 6.35 6.31 6.27 6.23 6.19 6.16 |

19 6.12 6.08 6.04 6.00 5.97 5.93 5.89 5.86 5.82 5.79 |

20 5.75 5.71 5.68 5.64 5.61 5.58 5.54 5.51. 5.47 5.44 |

21 5.41 5.37 5.34 5.31 5.27 5.24 5.21 5.18 5.15 5.12

22 5.09 5.06 5.02 4.99 4.96 4.93 4.90 4.87 4.85 4.82

23 4.79 4.76 4.73 4.70 4.67 4.65 4.62 4.59 4.56 4.53 |

24 4.51 4.48 4.45 4.43 4.40 4.37 4.35 4.32 4.30 4.27

25 4.25 4.22 4.20 4.17 4.15 4.12 4.10 4.07 4.05 4.03

26 4.00 3.98 3.95 3.93 3.91 3.89 3.56 3.84 3.82 3.79

27 Sodid 3.75 3.73 3.71 3.69 3.66 3.64 3.62 3.60 3.58

28 3.56 3.54 3.52 3.50 3.48 3.46 3.44 3.42 3.40 3.38

29 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.21 3.19

30 3.17 3.15 3.13 3.12 3.10 3.08 3.06 3.05 3.03 3.01

31 2.99 2.98 2.96 2.94 2.93 2.91 2.89 2.88 2.86 2.84

32 2.83 2.81 2.80 2.78 2.77 2.75 2.73 2.72 2.70 2.69

33 2.67 2.66 2.64 2.63 2.61 2.60 2.58 20 2.56 2.54

34 2.53 2.51 2.50 2.49 2.47 2.46 2.44 2.43 2.42 2.40

35 2.39 2.38 2.36 2.35 2.34 2.33 2.31 2.30 2.29 2.28

B 37

74

DAB LE V.

ee ee

WEIGHT OF VAPOR, IN GRAMMES,

CONTAINED IN A CUBIC METRE OF SATURATED AIR UNDER A BAROMETRIC PRESSURE OF —
760 MILLIMETRES, AND AT TEMPERATURES BETWEEN —20° AND -++-40° CENTIGRADE.
¢

Tue theoretic density of aqueous vapor is very nearly 0.622, or 3, of the density of
the air at the same temperature and pressure. Regnault’s experiments gave similar
results. From this ratio the weight of the vapor contained in a given volume of air,
the temperature and humidity of which are known, can be computed. ;

If we call
¢ = the temperature of the air ; |
f =the elastic force of the vapor contained in the air at the time of the observation 5
F =the maximum elastic force of vapor due to the temperature ¢, as given in the”
table ;
p = the weight of the vapor contained in a litre of air at the temperature ¢, and with
a force of vapor f ;
P = the weight of vapor in a litre of air at the temperature ¢, and at full saturation, |
or F.

2932238"
Then. PIG SY J

1201003677» 7602":

In which 1.293223 grammes is the weight of a litre of dry air, at the temperature
of zero Centigrade, and under a barometric pressure of 760 millimetres, according to
the determination of Regnault ; 0.00367, the coefficient of the expansion of the air
as found by the same; 760 millimetres, the assumed normal barometric pressure.

The weight of a litre of air given by Regnault in the Mémoires de V Institut, Tom.
XXI. p. 157, is 1.293187 grammes ; but by correcting a slight error of computation
(see E. Ritter, Mémoires de la Société Physique de Genéve, Tom. XIII. p. 361), it be-
comes, as given above, 1.293223 grammes.

In order to obtain the weight of vapor in a cubic metre, or 1000 litres, of saturated
alr, the formula becomes, |

1293.2238"- F
P = 0.622 TT ooose7e* 760"™ *

From this formula Table V. has been computed. The tensions due to the tem-
peratures in the first column are placed opposite the weights of vapor; they are
taken from Table I. It will be seen that, throughout the table, the number of
grammes of vapor nearly corresponds to the number of millimetres of pressure ex-—
pressing the tension.

The table of the weights of vapor given in Pouillet’s E/éments des Physique, Tom.
Il. p. 707, being based on older values, gives results somewhat different. In that pub-
lished by Becquerel, E/éments de Physique Terrestre, p. 354, Regnault’s tensions and |
coefficient of expansion of the air have been used, but the value of the weight of
vapor in a litre of air formerly determined by Biot and Arago, viz. 1.29954 grammes,
has been retained.

B 38

75

V. WEIGHT OF VAPOR, IN GRAMMES,

CONTAINED IN A CUBIC METRE OF SATURATED AIR,

At Temperatures between — 20° and + 40° Centigrade.

EF |
Temperature Force Weight Temperature Force Weight
of of of Difference. of of of Difference.
Dew-Point. Vapor. Vapor. Dew-Point. Vapor. Vapor.
| Centigrade. | Millimetres. | Grammes. Grammes. Centigrade. } Millimetres. | Grammes. Grammes.
—20° 0.912 1.042 als +10° 9.165 9.357 A.
-19 0.993 1.130 a 11 9.792 9.962 le
—18 1.080 1.204 , 12 10.457 10.601 ;
0.101 0.675
—17 1.174 1.325 13 11.162 11.276
% 0.109 = 0.712
—16 1.275 1.434 14 11.908 11.988
0.118 0.751
-15 1.385 1.551 15 12.699 12.739
0.127 0.793
—I4 1.503 1.678 pies 16 13.536 13.532 jeae
-13 1.631 1.813 She 17 14.421 14.367 ae
—12 1.768 1.957 su 18 15.357 15.247 | E
0.157 | 0.926
-l11 1.918 2.114 19 16.346 16.173

fs

A te are i en i ee tee
ee 7.

fe Ree ates meng nace y Az enpnen a
aes oes Ne See ae ee

i ee

Bs 1 Sp

A BERLE 12S OOH Ea iP AT BASCOM 1G NIUE TESS STI

fj
|

17

Pes CoCr a t,t DRS.

ENGLISH MEASURES,

BASED ON REGNAULT’S HYGROMETRICAL CONSTANTS.

78

Wor.

TABLE OF THE ELASTIC FORCE OF AQUEOUS VAPOR,

EXPRESSED IN ENGLISH INCHES OF MERCURY FOR TEMPERATURES OF FAHRENHEIT,
REDUCED FROM REGNAULT’S TABLE.

Tue values of the elastic force of vapor furnished by V. Regnault, which are
found in Table |. of this Hygrometrical set, are derived from a series of experiments
conducted, during several years, with great care, consummate skill, and all the means
of precision which are at the disposal of modern science. The methods of investi-
gation, and all the steps in each experiment, were minutely described and submitted
to the judgment of the scientific, successively in separate papers in several volumes
of the Annales de Chimie et de Physique, and collectively in his final Report to the
Minister of Public Works, (see above, p. 9,) which fills Volume XXI. of the Mé-
moires de Institut de France. The confidence which has been deservedly granted
to these determinations by nearly all scientific men, is increased by the fact that one
of the best physicists and experimenters in Germany, Professor Magnus, came,
about the same time, to results so little different, that both tables, for most purposes,
may be considered identical. (Compare below, Table XXII.) It seems, therefore,
that these values ought to be used in our hygrometrical tables, as has been done
in France, in preference to the older and less reliable determinations on which they
are based.

Though Regnault’s table of the elastic force of vapor is considered, even, it is be-
lieved, by a majority of scientific men in England, as the most reliable which science
now possesses, the author is not aware that any extensive reduction of it to English
measures, such as is wanted for meteorological purposes, has been as yet published ;
still less a series of tables based on these values. Such a set of hygrometrical tables
in English measures, corresponding to the preceding one in French measures, is
offered here, which, it is hoped, supplies a real want felt by a large number of me-
teorologists.

Table VI. is Regnault’s Table of the Elastic Force of Vapor as given in Table L.,
reduced to English measures, in which the fourth decimal is given in order to secure
the third, and otherwise to facilitate the computations. From these values Tables
VII. to X. have been computed.

79
VI. ELASTIC FORCE OF AQUEOUS VAPOR,

EXPRESSED IN EnGLIsH INcHES OF MERCURY FOR TEMPERATURES OF FAHRENHEIT.

REDUCED FROM REGNAULT’S TABLE.

Force of Vapor. | Force of Vapor. Force of Vapor. Force of Vapor.
| 'LTemper- ae mea | | Leniper="}- a 3) Temper- {*Temper-| *
t N at ature at
Seren. lenths of Degrees. Venere Tenths of Degrees. Peitane Tenths of Degrees. Riren. Tenths of Degrees.
heit. a heit. a heit. heit... }———________
0 0.5 0 0.5 0 0.5 | oO 0.5
'
Eng. In.| Eng. In. Eng. In.| Eng. In. Eng. In.| Eng. In. Eng. In |Eng. In.
—31 | 0.00587) 0.0085 —19 [S-O17e 0.0167 — 8 | 0.0297) 0.0290 +2 0.0476) 0.0485
—30 10.0092) 0.0090 —18 , 0.0181) 0.0176 af yOCe2 0.0304 3 0.0498, 0.0510
—29 10.0098) 0.0095 -—17 §00190| 0.0185 -— 6 pee 0.0319 4 | 0.0521 0.05383
—28 |0.0104| 0.0101 -—16 {0.0200} 0.0195 — 5 | 0.0343] 0.0335 5 | 0.0545 0.0558
—27 | 0.0110) 0.0107 —15 '0.0210| 0.0205 — 4 | 0.0359! 0.0351 | 6 , 0.0570 0.0584
—26 |0.0117| 0.0114 —14 | 0.0221) 0.0216 — 3 | 0.0376| 0.0368 7 1 0.0597 0.0611
—25 | 0.0124! 0.0120 —13 | 0.0232) 0.0227 — 2 | 0.0395) 0.0386 8 0.0625 0.0639
—24 |0.0131| 0.0127 —12 | 0.0244) 0.0238 — 1 § 0.0414) 0.0404 9 | 0.0654 0.0669
—23 | 0.0138] 0.0135 —11 ; 0.0257) 0.0250 — 0 (0.0434) 0.0424 10 (0.0684 0.0700
—22 | 0.0146) 0.0142 —10 | 0.0270) 0.0263 + 0 } 0.0434) 0.04144 1] 0.0716 0.0732
—21 | 0.0154) 0.0150 — 9 | 0.0283) 0.0276 + 1 } 0.0454! 0.0465 | 12 10.0749 0.0766
—20) | 0.0163] 0.0158 — 8 | 0.0297| 0.0290|} + 2 !0.0476 0.0457|| +13 0.0783 0.0800
Temper- Tenths of Degrees.
ature
Fahren- -
Bee) Ori) aks | 2 | 3. | 4. Gs, | 4eFe0 | 498.0 || Bs
————— | = Ba ba ee | ee
o || Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. Eng. In. | Eng. In. | Eng. In. ; Eng. In.
(| 0.0818 | 0 0822 | 0.0826 | 0.0530 | 0.0834 0.0841 | 0.0845 | 0.0849 | 0.0853
0.0857 | 0.0861 | 0.0565 | 0.0869 | 0.0873 0.0881 | 0.0885 | 0.0889 | 0.0893

16 0.0898 | 0.0902 | 0.0906
17 0.0910 | 0.0944 | 0.0949 | 0.0953 | 0.0958
18 0.0984 | 0.0989 | 0.0993 | 0.0998 | 0.1002

0.0910 | 0.0914
19 || 0.1080 | 0.1035 | 0.1040 | 0.1044) C.1049

0.0931 | 0.0936
0.0975 | 0.0980
0.1021 | 0.1025 |

0.1068 | 0.1073

0.0923 | 0.0927
0.0967 | 0.0971
0.1012 | 0.1016
0.1059 | 0.1064

20 || 0.1078 | 0.1083 | 0.1088
21 || 0.1128 | 0.1133 | 0.1138
22 || 0.1179 | 0.1185 | 0.1190
23 || 0.1233 | 0.1238 | 0.1244

0.1093 | 0.1098
0.1143 | 0.1148
0.1195 | 0.1200
0.1249 | 0.1255
0.1306 | 0.1312
0.1365 | 0.1371

0.1108 | 0.1113
0.1159 | 0.1164
0.1211 | 0.1217 | 0.1222 | 0.1227
0.1266 | 0.1272 | 0.1277 | 0.1283

0.1324 | 0.1329 | 0.1335 | 0.1341

0.1118 | 0.1123
0.1169 | 0.1174

24 0.1289 | 0.1295 | 0.1300

25 0.1347 | 0.1353 | 0.1359 0.1383 | 0.1389 | 0.1395 | 0.1401

26 0.1407 | 0.1413 | 0.1419
27 0.1469 | 0.1476 | 0.1482
28 0.1534 | 0.1540 | 0.1547
29 0.1600 | 0.1607 | 0.1613
30 0.1668 | 0.1675 | 0.1682
31 0.1739 | 0.1746 | 0.1753

0.1426 | 0.1482
0.1488 | 0.1495
0.1553 | 0.1560
0.1620 | 0.1627
0.1689 | 0.1696
0.1760 | 0.1767

0.1457 | 0.1463
0.1521 | 0.1527
0.1587 | 0.1593
0.1654 | 0.1661
0.1724 | 0.1732
0.1796 | 0.1804

0.1444 | 0.1450
0.1508 | 0.1514
0.1573 | 0.1580
0.1641 | 0.1647
0.1710 | 0.1717
0.1782 | 0.1789

eee

6. 7 8. 9.

3. 4.

| oO. 1. 2.

B 43

80

ELASTIC FORCE OF AQUEOUS VAPOR. — REGNAULT.

EXPRESSED !N ENGLISH INCHES OF MERCURY FOR TEMPERATURES OF F'AHRENHEIT.

(oS :? k8kO80—0—0—O$0$cO lll a aa 0 ss ey

Tenths of Degrees.

'

Tempera-
ture of
Fahren-

heit.

42
43
Ad
45
46

0.

Eng. In.
0.1811

0.1883
0.1959
0.2037
0.2119

0.2204
0.2291
0.2382
0.2476
0.2572

0.2672
0.2775
0.2882
0.2993
0.3108

0.3228
0.3351
0.3477
0.3608
0.3743

0.3882
0.4027
0.4176
0.4331
0.4490

0.4655
0.4825
0.5000
0.5179
0.5365

0.5558
0.5756
0.5962
0.6173
0.6392
0.6616

1.

Eng. In.
0.1818
0.1891
0.1967
0.2045
0.2127

0.2212
0.2300
0.2391
0.2485
0.2582

0.2682
0.2785
0.2893
0.3005
0.3120

0.3240
0.3363
0.3490
0.3622
0.3756

0.3896
0.4041
0.4191
0.4346
0.4507

0.4672
0.4842
0.5017
0.5158
0.5384

0.5577
0.5777
0.5983
0.6195
0.6414
0.6639

2.

Eng. In.
0.1825
0.1898
0.1974
0.2053
0.2135

0.2221
0.2309
0.2400
0.2495
0.2592

0.2692
0.2796
0.2904
0.3016
0.3132

0.3252
0.3376
0.3503
0.3635
0.3770

0.3911
0.4056
0.4207
0.4362
0.4523

0.4689
0.4859
0.5035
0.5216
0.5403

0.5597
0.5797
0.6004
0.6217
0.6436

0.6662

Be

Eng. In.
0.1833
0.1906
0.1982
0.2061
0.2144

0.2230
0.2318
0.2410
0.2504
0.2602

0.2702
0.2807
0.2915
0.3028
0.3144

0.3264
0.3388
0.3516
0.3648
0.3784

0.3925
0.4071
0.4222
0.4378
0.4539

0.4705
0.4876
0.5053
0.5234
| 0.5422

O.5€17
0.5817
0.6025
0.6238
| 0.6458
0.6685

3.

4.

0.1840
0.1913
0.1990
0.2070
0.2152

0.2238
0.2327
0.2419
0.2514
0.2612

0.2713
0.2817
0.2926
0.3039
0.3156

0.3276
0.3401
0.3529
0.3661
0.3798

0.3939
0.4086
0.4237
0.4394
0.4556

0.4722
0.4894
0.5071
0.5253
0.5441

0.5636
0.5838
0.6046
0.6260
0.6481
0.6708

4.

Eng. In.

3.

Eng. In.
0.1847
0.1921
0.1998
0.2077
0.2161

0.2247
0.2336
0.2428
0.2524
0.2622

0.2723
0.2828
0.2937
0.3050
0.3168

0.3289
0.3414
0.3542
0.3675
0.3812

0.3954
0.4101
0.4253
0.4410
0.4572

0.4739
0.4912
0.5089
0.5271
0.5461

0.5656
0.5858
0.6067
0.6282
0.6503
0.6731

5.

6.

Eng. In.
0.1854
0.1928
0.2006
0.2086
0.2169

0.2256
0.2345
0.2438
0.2533
0.2632

0.2733
0.2839
0.2948
0.3062
0.3179

0.3301
0.5426
0.3556
0.3688
0.3826

0.3968
0.4116
0.4268
0.4426
0.4589

0.4756
0.4929
0.5107
0.5299
0.5480

0.5676
0.5879
0.6088
0.6304
0.6525
0.6754

6.

ce

Eng. In.
0.1861
0.1936
0.2013
0.2094
0.2178

0.2265
0.2354
0.2447
0.2543
0.2642

0.2744
0.2850
0.2960
0.3074
0.3191

0.3313
0.3439
0.3569
0.3702
0.3840

0.3983
0.4131
0.4284
0.4442
0.4605

0.4773
0.4947
0.5125
0.5301
0.5499

0.5696
0.5899
0.6109
0.6325
0.6548
0.6777

7

8.

0.1869
0.1944
0.2021
0.2102
0.2186

0.2273
0.2364
0.2457
0.2553
0.2652

0.2754
0.2860
0.2971
0.3085
0.3203

0.3326
0.3452
0.3582
0.3715
0.3854

0.3997
0.4146
0.4299
0.4458
0.4622

0 4791
0.4964
0.5143
0.5328
0.5519

0.5716
0.5920
0.6131
0.6347
0.6571
0.6800

Eng. In.

9.

Eng. In.
0.1876
0.1951
0.2029
0.2111
0.2195

0.2282
0.2373
0.2466
0.2563
0.2662

0.2764
0.2871
0.2982
0.3097
0.3215

0.3338
0.3465
0.3595
0.3729
0.3868

0.4012
0.4161
0.4315
0.4474
0.4638

0.4808
0.4982
0.5161
0.5346
0.5538 °

0.5736
0.5941
0.6152
0.6369
0.6593

i
|
|

0.6824 f

|

ELASTIC FORCE OF AQUEOUS VAPOR. — REGNAULT. 81

EXPRESSED IN Encuisu IncHES OF MERCURY FOR TEMPERATURES OF FanRENUEIT.

ass.
| Tenths of Degrees. |
Tempera- |

ture of

Fabren-
| heit. 0. i. 2. De 4. De | 6. dtc 8. 3.
| ° Eng. In. | Eng. In. | Eng. In. | Eng. me Eig. In. | Eng. In. | Eng. In. ‘Eng. in Eng. In. | Eng. In. |)
63 0.6847 | 0.6870 | 0.6894 | 0.6917 | 0.6941 | 0.6965 | 0.6989 | 0.7012 | 0.7036 | 0.7060
69 0.7084 | 0.7108 | 0.7133 | 0.7157 | 0.7181 | 0.7206 | 0.7230 | 0.7255 | 0.7280 | 0.7305
70 0.7329 | 0.7354 | 0.7379 | 0.7405 | 0.7430 } 0.7455 | 0.7480 | 0.7506 | 0.7531 | 0.7557
aL 0.7583 | 0.7609 | 0.76314 | 0.7660 | 0.7686 | 0.7712 | 0.7739 | 0.7765 | 0.7791 | 0.7818 |!
72 0.7844 | 0.7871 | 0.7897 | 0.7921 | 0.7951 | 0.7978 | 0.8005 | 0.8032 | 0.8059 | 0.8086
73 0.8113 | 0.8141 | 0.8168 | 0.8196 | 0.8223 | 0.8251 | 0.8279 | 0.8307 | 0.8335 | 0.8363
7d 0.8676 | 0.8705 | 0.8735 | 0.8764 | 0.8793 | 0.8822 | 0.8852 | 0.8881 | 0.8911 | 0.8910

76 0.8970 | 0.9000 | 0.9030 | 0.9060 | 0.9090 | 0.9120 | 0.9150 | 0.9180 | 0.9211 | 0.9242
add 0.9272 | 0.9302 | 0.9333 | 0.9364 | 0.9395 | 0.9126 | 0.9457 | 0.9488 | 0.9519 | 0.9550

78 0.9582 | 0.9613 | 0.9645 | 0.9677 | 0.9709 | 0.9740 | 0.9773 | 0.9805 | 0.9837 | 0.9869
79 0.9902 | 0.9934 | 0.9967 | 1.0000 | 1.0033 | 1.0065 | 1.0099 | 1.0132 | 1.0165 | 1.0198

{|

71 0.8391 | 0.8419 | 0.8447 | 0.8476 | 0.8504 | 0.8533 | 0.8561 | 0.8590 | 0.8619 | 0.8648
i

|

| 80 1.0232 | 1.0265 | 1.0299 | 1.0332 | 1.0366 | 1.0100

.0134 | 1.0168 | 1.0503 | 1.0537
.0780 | 1.0815 | 1.0851 | 1.0886
.1136 | 1.1172 | 1.1209 | 1.1245

— ee

SS ee ee SS SS eee

|
81 1.0572 | 1.0606 | 1.0641 | 1.0675 | 1.0710 | 1.0745
82 1.0922 | 1.0957 | 1.0993 | 1.1028 | 1.1064 | 1.1100
83 1.1281 | 1.1318

1.1354 | 1.1391 | 1.1428 | 1.1465 | 1.1502 | 1.1539 | 1.1576 | 1.1614

84 1.1651 | 1.1689 | 1.1726 | 1.1764 | 1.1802 | 1.1840] 1.1878 | 1.1916 | 1.1954 | 1.1993

85 1.2031 | 1.2070 | 1.2103 | 1.2147 | 1.2186 | 1.2225 | 1.2264 | 1.2803 | 1.2342 | 1.2381

86 1.2421 | 1.2460 | 1.2500 | 1.2540 | 1.2580 | 1.2620 | 1.2660 | 1.2700 | 1.2740 | 1.2781

87 1.2821 | 1.2862 | 1.2903 | 1.2944 | 1.2985 | 1.3026 | 1.3068 | 1.3109 | 1.3151 | 1.3192

88 1.3234 | 1.3276 | 1.3318 | 1.3361 | 1.3403 | 1.3445 | 1.3488 | 1.3531 | 1.3573 | 1.3616

89 1.3659 | 1.3703 | 1.3746 | 1.8789 | 1.3833 | 1.3877 | 1.3920 | 1.3964 | 1.4008 | 1.4053

. 90 1.4097 | 1.4141 | 1.4186 | 1.4230 | 1.4275 | 1.4320 | 1.4365 | 1.4410 | 1.4456 | 1.4501

¥1 1.4546 | 1.4592 | 1.4638 | 1.4684 | 1.4730 | 1.4776 | 1.4822 | 1.4869 | 1.4915 | 1.4962

92 1.5008 | 1.5055 | 1.5102 | 1.5149 | 1.5197 | 1.5244 | 1.5291 | 1.5339 | 1.5387 | 1.5435

Ph 93 1.5482 | 1.5531 | 1.5579 | 1.5627 | 1.5676 | 1.5724 | 1.5773 | 1.5822 | 1.5871 | 1.5920

94 1.5969 | 1.6018 | 1.6068 | 1.6117 | 1.6167 | 1.6217 | 1.6267 | 1.6317 | 1.6367 | 1.6417

~ 95 1.6468 | 1.6518 | 1.6569 | 1.6620 | 1.6671 | 1.6722 | 1.6773 | 1.6825 | 1.6876 | 1.6928

* 96 1.6980 | 1.7032 | 1.7084 | 1.7137 | 1.7189 | 1.7242 | 1.7295 | 1.7348 | 1.7401 | 1.7454 |,

¥ 97 1.7508 | 1.7561 | 1.7615 | 1.7669 | 1.7723 | 1.7777 | 1.7831 | 1.7886 | 1.7940 | 1.7995

98 1.8050 | 1.8105 | 1.8160 1.8215 | 1.8271 | 1.8327 | 1.8382 | 1.8438 | 1.8494 | 1.8551

99 1.8607 | 1.8664 | 1.8720 1.8777 | 1.8834 | 1.8891 | 1.8949 | 1.9906 | 1.9064 | 1.9121

i: 100 1.9179 | 1.9237 | 1.9295 | 1.9354 | 1.9412 | 1.9.71 | 1.9530 | 1.9589 | 1.9648 | 1.9707

101 1.9766 | 1.9826 | 1.9885 | 1.9945 | 2.0005 | 2.0065 | 2.0126 | 2.0186 | 2.0247 | 2.0307

5 102 2.0368 | 2.0129 | 2.0190 2.0552 | 2.0613 | 2.0675 | 2.0737 | 2.0798 | 2.0861 2.0923

y 103 2.0985 | 2.1048 | 2.1110 2.1173 | 2.1236 | 2.1299 | 2.1362 | 2.1426 | 2.1489 2.1553

| 104 2.1617 | 2.1631 | 2.1745 | 2.1810 | 2.1874 | 2.1939 | 2.2004 | 2.2069 | 2.2135 ; 2.2200
iesasis — SS = x | ieee es i =

82

VIL.

PSYCHROMETRICAL TABLES,

GIVING, IN ENGLISH INCHES OF MERCURY, THE ELASTIC FORCE OF VAPOR CONTAINED
IN THE AIR, AND ITS RELATIVE HUMIDITY IN HUNDREDTHS 5

DERIVED FROM THE INDICATIONS OF THE WET AND DRY BULB THERMOMETERS,
IN DEGREES OF FAHRENHEIT.

By A. Guyor.*

M. V. Reenavtt, in his Etudes sur ’ Hygrométrie Annales de Chimie et de Phy-
sique, 3™° série, Tom. XV. p. 129, after having discussed the theoretical bases of the
psychrometric formula given by August, and modified the numerical values of some
of its coefficients, adopts the formula

0.480 (t—t")
tat ra aacioe=iieta

for temperatures above the freezing-point ; and when the temperature of the wet ther-
mometer is below the freezing-point, the bulb being covered with a film of ice,

0.480 (t — 1’)
Td Gp So eaeg ees

* While shis table was going through the press, a similar one, prepared by Prof. J. H. Coffin for
his private use, was published by the Smithsonian Institution, in order to meet an urgent demand
from many quarters. Being based on the same formula, it gives the same results, except, perhaps, in
degrees below 14° Fahrenheit, where the tables show slight discrepancies. These unimportant
differences arise from the fact that Prof. Coffin’s table was computed from Regnault’s tensions, as
given in the first edition of this collection, while the author’s table is based on the table of tensions as
given in this second edition, in which the values below 14° Fahrenheit have been somewhat modified,
for reasons given-above. The following table gives also the relative humidity with one more decimal,
which makes the interpolations more easy; and a column of differences for finding the values for
fractions of ¢’. A table for reducing the results to another barometric height is added at the end of
tha table.

B 46

PSYCHROMETRICAL TABLES. 83

in which
x represents the force of vapor in the air at the time of the observation ;
t, the temperature of the air in Centigrade degrees, indicated by the dry
thermometer ;
t', the temperature of evaporation given by the wet thermometer ;
f, the force of vapor in a saturated air at the temperature ?’ ;
h, the height of the barometer.

Substituting the Fahrenheit scale for the Centigrade, the formula, for temperatures
above. the freezing-point, reads

et, 0.480 XK 3 (¢—t') 0.480 ee
ties Jt career Bee: a) ?= ad mieoS hs

and below the freezing-point,

the 0.480 X 8 (¢— iC a 0.480 (¢ — -
te Gages aT) Te ene

Making, further, A = 29.7 English inches, these formule become

ie 0.480 (¢ — 14.256 (t — t/)
Ba ris0 = 29.7 = 113050

and

ae 29.4 Bays

14.256 (t — V’)
a ee a
TS aoe

1272.2 —t?!

The mean barometric pressure for which the table has been computed, viz. 29.7
inches, is, within a small fraction, the same as that adopted in Haeghens’s Tables,
No. II., which is 755 millimetres = 29.725 Eng. inches. As that slight difference
in the barometric pressure cannot cause, in the most extreme cases, a difference ex-
ceeding two thousandths of an inch in the elastic forces, the results in the two tables
may be considered identical.

That barometric pressure, corresponding, in our latitudes, to a mean altitude of 250
to 300 feet above thesea, is likely tosuit, without requiring a correction, the largest num-
ber of meteorological stations. Should the mean height of the barometer, in conse-
quence of the elevation of the station, much differ from that adopted in the table, a con-
stant correction can be determined, to be applied to thenumbersin the table. Attheend,
page 72, will be found a table which furnishes that correction for barometric heights
- between 20 and 31 inches, and for values of t—?¢ between 2° and 26° Fahrenheit.

The effect of the irregular variations of the barometer at the same station can, in
most cases, be neglected ; for the error due to that cause will scarcely ever exceed
those which may arise from the uncertainty of the very elements on which the tables
are based.

B 47

84 PSYCHROMETRICAL TABLES.

ARRANGEMENT OF THE TABLES.

The same arrangement as is found in the Psychrometrical for the Centigrade scale
has been adopted.

The first column at the left contains the indications of the wet-bulb thermometer,
from —31° to 105° Fahrenheit.

The second column gives the differences of the force of vapor for each tenth of a
degree, between each two consecutive full degrees in the first column. It enables the
observer easily to find the values for the fractions of degrees of the wet thermometer.

The following double columns furnish the forces of vapor and the relative humidity
corresponding to each full degree of the wet-bulb thermometer given in the first
column in the same horizontal line, and to the difference of the two thermometers,
or t—1’, found at the head of each column, for every half-degree from 0° to 26°.5.
The relative humidity, or the fraction of saturation, is given in hundredths, which is
near enough for meteorological purposes ; but one decimal more has been added,
though separated by a point, in order to facilitate the interpolations.

At the bottom of each page is found the mean difference, for each tenth of a dene
between the forces of vapor on the same line. It gives the means of finding the
values for the intermediate differences of ¢ — ¢’, not found in the tables.

Use oF THE TABLES.

Enter the tables with the difference of the two thermometers, or ¢— ¢’, and the
temperature of the wet-bulb thermometer, given by observation.

In the column headed by the observed difference of the thermometer, ¢ — ¢’, and
on the horizontal line headed by the observed temperature of the wet thermometer, ¢’,
are found the force of vapor, and the relative humidity corresponding to these tem-
peratures.

For the fractions of degrees of the wet thermometer, multiply the decimal fraction
by the number placed in the second column between the full degree and the next,
and add the product if the temperature is above, and subtract it if it is below zere
Fahrenheit.

The intermediate values of t— ?’ not given in the table are found by subtracting
the number in the line at the bottom of the page, multiplied by the number of addi-
tional tenths, from the value given in the table. This correction, being always very
small, can usually be neglected.

For the relative humidity, interpolations at sight will generally suffice.

Examples.

ie Dry thermometer, ¢ = 50° F.
Wet thermometer, t' = 43° F.
Difference, ort —t! = 7° F.
Page 58, we find for t —¢/ =: 7° in the third double column, and for t/ = 48° in
the first column

Force of vapor in the air = 0.186 inch.
‘Relative humidity in hundredths = 51

B 48

PSYCHROMETRICAL TABLES. 85

Dry thermometer, ¢ = 88°.5 F.
Wet thermometer, ¢/ = 76°.3 IB:
Difference, t — t’ = 12°.2 F.

. Page 63, Table gives for t — t/ = 12 and t' = 76° = 0.735 inch.
Add for fraction of ¢/ = 0.3, 0:003 xk 3. (0:009
Subtract for fraction of t — ¢/ = 0°.2, OOlar <2 = — 0.003

Force of vapor in the air = _ ‘0.741
Relative humidity == OD
Dry thermometer, ¢ = — 4°.5 F.
Wet thermometer, ¢/ = 6°.0 F.
Difference, t — t! = 1°.5 F.
Page 50, Table gives for t — t/ = 1°.5 and t/ = — 6° = 0.016 inch.
Subtract for fraction of t/ = 0.5, 0.0002 « 5 = — 0.001
Force of vapor in the air = 0.015
Relative humidity ay

VII. PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths,

| t—t’, or Difference of Wet and Dry Bulb Thermometers.
| t’, below the Freezing-Point ; the Bulb covered with a Film of Ice.
| Wet- | Mean
Bulb | Vertical
[| Tuermo-ifferencey Qo, 0°.5 1°.0 1°.5 2°.0 2°.5 |
| meter | of Force
| t of.) 0. ss ee Ee ee ee Ee
'| Fahren- | for eich Eee: Rela- Rela- Bele nae | Rela-
heit. Ooale tive tive | tive
Force of ue Force of; f{y- {Force of; qpy- [Force of ae Force of ee Force of} Hu-
Vapor. | mid- | Vapor. | yia- | Vapor. | midg- | Vapor. | mid- | Vapor. | mia. | Vapor- | mid-
ity. _ ity. ity. ity. ity. ity.
° Eng. In ‘Eng. In c Eng. In Eng. In Eng. In
tae 0.009 | 100 | 0.003 | 36.0
-30 idee 0.009 | 100 | 0.004 | 39.6
= Quali oe 0.010 | 100 | 0.004 | 42.9
—28 es 0.010 | 100 | 0.005 | 46.1
sO ie 0.011 | 100 | 0.006 | 49.0
-00006
--26 0.012 | 100 | 0.006 | 51.8
-00007
—25 rs 0.012 | 100 | 0.007 | 54.4
—24 | °°°°°7 | 0.013 | 100 | 0.008 | 56.8
-23 oa 0.014 100 | 0.008 | 59.0
—22 | °° 10.015 | 100 | 0.009 | 61.0
-00008
—21 ine 0.015 | 100 | 0.010 | 62.6 | 0.004 | 26.9
—20 He 0.016 | 100 | 0.011 | 64.2] 0.005 | 30.3
ah like ng | Or027 | 100 | 0.012 | 65.9 | 0.006 | 33.5
-is | °° | 0.018 | 100 | 0.012 | 67.5 | 0.007 | 36.6
-17 | °°°' | 0.019 | 100 | 0.013 | 69.0 | 0.008 | 39.5
-0001
=16 aie 0.020 | 100 | 0.014 | 70.4] 0.009 | 42.3
-15 ate 0.021} 100 | 0.015 | 71.8 | 0.010 | 44.9 19.4
ne Sas 0.022 | 100 | 0.017 | 73.0} 0.011 | 47-4 23.0
-13 sets 0.023 | 100 | 0.018 | 74.3} 0.012 | 49.8 26.4
—12 | °°"! | 0.024} 100 | 0.019 | 75.4] 0.013 | 51.9 29.5
0001
—11 ae 6 0.026 | 100 | 0.020 | 76.5] 0.014 | 53.9 32.5
—10 Pe 0.027 | 100 | 0.021 | 77.5] 0.016 | 55.7 35.3 10.005 | 15.6
259 ie 0.028 | 100 | 0.023 | 78.5 | 0.017 | 57.7 38.3 | 0.006 | 19.1
= 8 a2 0.030 | 100 | 0.024 | 79.4] 0.018 | 59.4 40.6 | 0.007 | 22.5
-7 ea 0.031 | 100 | 0.026 | 80.3 | 0.020 | 61.1 43.0} 0.009 | 25.7
-6]° 0.033 | 100 |.0.027 | 81.1 | 0.021 | 62.7 45.4]0.010 | 28.4 | 0.005 | 12.9 |
-0002
—5 es 0.034 | 100 | 0.029 | 81.8 | 0.023 | 64.5 47.6 }0.012 | 31.7 | 0.006 | 16.4
-4 ee 0.036 | 100 | 0.030 | 82.5] 0.025 | 65.8 49.8] 0.014 | 34.5 | 0.008 | 19.8
- 3 ba 0.038 | 100 | 0.032 | 83.2 | 0.026 | 67.1 51.710.015 | 36.9 | 0.010 | 22.8
~—2 rem 0.039 | 100 | 0.034 | 83.9 | 0.028 | 68.3 53.51 0.017 | 39.3 2
-1 Mie 0.041 | 100 | 0.036 | 84.5 | 0.030 | 69.5 55.3 10.019 | 41.6
-0o' |" 0.043 | 100 | 0.038 | 85.0 | 0.032 | 71.0 57.0 | 0.021 | 43.8 |
: Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0012.
B 50

Wet-
Bulb
Thermo
meter
t
Fahren-
heit.

mRwr eo?

ST

met et
Ne © oe mstn o

iw}
bo

PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

Mean
Vertical

0.055
0.057
0.059
0.062
0.065

0.068
0.071
0.075
0.078
0.082

0.086
0.090
0.094
0.098
0.103

0.108
0.113
0.118
0.123
0.129
0.135

0.141
0.147
0.153
0.160
0.167
0.174

mid-
ity.

100
100
100
100
100

100
100
100
100
100

100
100
100
100
100

100
100
100
100
100

100
100
100
100
100
100

100
100
100
100
100
100

t— t’, or Difference of Wet and Dry Bulb Thermometers.

0°.

. [Force of

Vapor

Eng. In.
0.038
0.040
0.042
0.044
0.046

0.049
0.051
0.054

0.057
0.059

0.062
0.066
0.069
0.072
0.076

0.080
0.084
0.088
0.093
0.097

0.102
0.107
0.112
0.118
0.123
0.129

0.135
0.141
0.148
0.154
0.161
0.168

3 re.

Rela-
tive
Hu-
mid-
ity.

Force of
Vapor.

Eng. In,
0.032
0.034
0.036
0.038
0.041

85.0
85.6
86.2
86.7
87.2

0.043
0.046
0.048
0.051
0.054

87.7
88.2
88.6
$9.0
89.4

0.057
0.061
0.063
0.067
0.071

89.8
90.1
90.4
90.7
91.0

0.074
0.078
0.083
0.087
0.092

91.3
91.6
DIED
92.1
92.4

0.096
0.101
0.107
0.112
0.117
0.123

92.6
92.9
93.1
93.3
93.6
93.8

94.0
94.1
94.3
94.5
94.7
94.8

0.129
0.136
0.142
0.149
0.155
0.162

0

Rela-
tive
Hu-
mid-
ity.

70.7

71.8

73.0

74.0

75.0

76.0
76.9
Mle
78.4
79.1

79.7
80.4
81.0
81.6
82.3

82.9
83.4
84.0
84.5
85.0

85.5
86.0
86.4
86.8
87.2
87.6

88.0
$8.3
83.7
89.0
89.3
89.6

| vi
Force o:

ti
Hu- {Force of

Vapor.

0.038
0.040
0.043
0.045
0.048

0.051
0.054
0.055

0.061 |

0.065

0.069
0.073
0.077
0.081
0.086

0.091
0.096
0.101
0.106
0.112
0.118

0.123
0.130
0.136
0.143
0.150
0.157

e

mid-
ity.

57.0
58.6
60.2
61.8
63.3

64.7
66.0
67.1
68.2
69.2

70.1
71.1
72.1
73.0
73.9

74.8
75.7
76.5
77.2
78.0

78.7
79.4
80.0
80.7
81.2
81.8

82.4
82.9
83.4
83.9
84.3
84.8

0.032
0.034
0.037
0.040
0.043

0.046
0.049
0.052
0.056
0.059

0.063
0.067
0.071
0.076
0.080

0.085
0.090
9.095
0.100
0.106
0.112

0.117
0.124
0.130
0.137
0.144
0.151

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0012.

53.8
55.3
56.8
58.2
59.6

61.0
62.3
63.5
64.8
65.9

67.1
68.2
69.2
70.2
71.2

72.1
73.0
73.8
741.6
75.4
76.1

76.8
77.5
78.2
78.8
79.4
80.0

ot

t’, below the Freezing-Point , the Bulb covered with a Film of Ice.

0.026
0.029
0.031
0.034
0.037

0.040
0.043
0.046
0.050
0.054

0.057
0.061

2°.5

0.066
0.070
0.075

0.079
0.084
0.089
0.095
0.100
0.106

0.112
0.118
0.125
0.131
0.138
0.145

87

Rela-
tive
Ilu-

mid-
ity |

31.3 |!
33.9 i

36.4 |
38.8
41.2
43.4

59.7
61.0
62.3
63.5
64.7

65.8
66.9
68.0
68.9
69.9
70.7 |

71.6
72.5
73.3
74.0 |
74.8 |
75.6 ||

88 PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit — Force of Vapor in English Inches. — Relative Humidity in Hundredths,

|
;
t— t', or Difference of Wet and Dry Bulb Thermometers. .

t!, below the Freezing-Point ; the Bulb covered with a Film of Ice.
Wet- Mea =
| Bulb Vertical
| Thermo- Difference 3°.0 3°.5 4°.0 4°.5 5°.0 5°.5
meter | of Force
t of Vapor a oo a
Fahren- for each laeetae Rela- Rela- Rela | Reta- Rela- |
heit. 0°.1. | tive tive tive tive tive tive
Force of, fjy- |Force of, jyy- |Force of} Hu- [Force of; yyy- |Force of) Jfu- {Force off Hue
Vapor. | mia- | Vapor. | mid- | Vapor. | mid- | V@por- | mia- | Vapor. | mid- } Vapor. | mid-
ity. ity. ity ity. ity. ity.
° ng. In. Eng. In. Eng. In. Eng. In Eng. In |
9 | o.coo2 | 2-010 | 19-3] 0.004) 7.9
1 noo2 | 0-012 | 22-3 | 0.006 | 11.3
2 | oon | 0-014 | 25-3 | 0.008 | 14.7
3 | goa | 9-016 | 28-1 | 0.010 | 17.8
4 |" ~ 70.018 | 30.8] 0.013 | 20.9 | 0.007 | 11.4
-0002 |
5 noon | 27022 | 33.4] 0.015 | 28.8] 0.010 | 14.6 |
6 he 0.023 | 35.6] 0.018 | 26.3} 0.012 | 17.5] 0.006 | 9.0)
7 | “ooos | 02026 | 37-7 | 0.020 | 28.8] 0.014 | 20.2] 0.009 | 12.0]
8 | joos | 0-028 | 39-8 | 0-023 | 31-2 | 0.017 | 22.9] 0.011 | 15.0
9 “10.031 | 41.5 | 0.026 | 33.5 | 0.020 | 25.5] 0.014 | 17.9 | 0.009
-0003 |
10 song | 02034 | 43-8 | 0.029 | 35.7 | 0.028 | 28.0 | 0.017 | 20.6 | 0.012
11 ae 0.037 | 45.7 | 0.032 | 37.9 | 0.026 | 30.4 | 0.020 | 23.3 | 0.014 $.9
12 Bac 0.041 | 47-5] 0.035 | 40.0} 0.029 | 32.7 | 0.024 25.8 | 0.018 12.9
13 cael 0.044 | 49.2 | 0.039 | 42.0 | 0.033 | 35.0 | 0.027 | 28.3 | 0.022 15.8
14 0.048 | 50.9 | 0.042 | 43.9 | 0.037 | 37.1] 0.031 | 30.7 | 0.025 18.5
20004 |
15 a 0.052 | 52.5 | 0.046 | 45-7 | 0.040 | 39.2 | 0.035 | 32.9 | 0.029 21.2
16 es 0.056 | 54.1] 0.050 | 47.5 | 0.044 | 41.2 | 0.039 | 35.1 | 0.033 OBE
17 ea 0.060 | 55.6 | 0.054 | 49.2 | 0.049 | 43.1] 0.043 | 37.2 | 0.037 26.2
18 hes 0.065 | 57.0] 0.059 | 50.9 | 0.053 | 44.9 | 0.047 | 39.2 | 0.042 28.5 ||
19 | °° 10.069 | 58.4] 0.063 | 52-5 | 0.058 | 46.7 | 0.052 | 41.2 | 0.046 30.7
0005
20 ae 0.074 | 59.8] 0.068 | 54.0] 0.062 | 48.3 | 0.057 | 43.0 | 0.050 32.9
21 ~~” 10.079 | 61.0] 0.073 | 55.4 | 0.067 | 50.0 | 0.062 | 44.7 | 0.056 34.9
22 | °° 10.084 | 62.2] 0.078 | 56.8 | 0.072 | 51.5 | 0.067 | 46.4} 0.061 36.8
| 23 0005 | 9.089 | 63.4 | 0.083 | 58.1] 0.078 | 52.9 | 0.072 | 48.0 | 0.066 38.6
24 | °° 10.095 | 64.4] 0.089 | 59.3] 0.088 | 54.3 | 0.077 | 49.6 | 0.072 40.5
25 | °°°°° 10.100 | 65.5 | 0.095 | 60.5 | 0.089 | 55.6 | 0.083 | 51.0 | 0.078 42.2
0006
26 Pah 0.106 | 66.5 | 0.101 | 61.7] 0.095 | 56.9 | 0.089 | 52.4] 0.0838 43.9
| 27 eee? 10.113 | 67-5] 0.107 | 62.8 | 0.101 | 58.2 | 0.095 | 53.8 | 0.090 45.5
28 | “°° 10.119 | 68.5 [0.113 | 63.9 | 0.108 | 59.4] 0.102 | 55.2 | 0.096 47.0
| 29 Aces 0.126 | 69.4] 0.120 | 64.9] 0.114 | 60.6] 0.108 | 56.4 | 0.103 48.5
30 | 7 10.132 | 70.3 | 0.127 | 65.9 | 0.121 | 61.7] 0.115 | 57.7 | 0.109 49.9
| gi | “°° 10.139 | 71.2] 0.134 | 66.9 | 0.128 | 62.8 | 0.122 | 58.8 | 0.116 51.2
Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0012. \
— =I)
B

52

PSYCHROMETRICAL TABLES. 89

Temperature, Fahrenheit. — Force of Vapor in English Inches — Relative Humidity in {lundredths.

t —t’, or Difference of Wet and Dry Bulb Thermometers.

t', below the Freezing-Point ; the Bulb covered with a Film of Ice.

7° 8°.0

Rela- | Rela- Rela-
tive tive tive tiv!
Force of| j{y- Force of; ffy- |Force of jfy- (Force of, Hu-

Vapor. | miq- | Vapor. | mid- | Vapor. | mia- | Vapor. | mia
ity. ity. | ity ity. |]
‘ Eng. In Eng. In. Eng. In Eng In.| |
RPP 3. 1:0.007
Bl <ccpa 40-0101. 9-9
14 | oooq | 0-014 | 12:8 | 0.008 | 7.5
15 | “ong | 0-018 | 15-7] 0.012 | 10.4] 0.006 | 5.4
16 0.022 | 18.4| 0.016 | 13.3] 0.010] 8.4
0004
17 | ogg | 9-026 | 21-0 | 0.020 | 16.0 | 0.015 | 11.3] 0.009 | 6.7 |
18 | 1,5 | 0-030 | 23-5 | 0.025 | 18.6 | 0.019 | 14.0] 0.013 | 9.6} 0.008 | 5.3
19 | “age, | 0-085 | 25-8 | 0.029 | 21.2 | 0.023 | 16.6 | 0.018 | 12.3} 0.012 | 8.2] 0.006 4.2 ||
20 | ogg | 2040 | 28-1 | 0.034 | 23.5 | 0.028 | 19.0] 0.022) 15.0] 0.017 | 11.0] 0.011] 7.1
21 0.044 | 30.3 | 0.039 | 25.8 | 0.033 | 21.5 | 0.027 | 17.5] 0.022 | 13.5] 0.016| 9.8
-0005
22 |, |.0.050 | 82.3 | 0.044 | 28.0 | 0.038 | 23.8 | 0.082 | 19.8 | 0.027 | 16.0 | 0.021 | 12.3
23 | 7. | 0.055 | 34.2 | 0.049 | 30.1 | 0.043 | 26.0 | 0.038 | 22.1 | 0.032 | 18.4] 0.026 | 11.8
24 |“. 10.060 | 36.1 | 0.055 | 32.1 | 0.049 | 28.1 | 0.043 | 24.4 | 0.038 | 20.7 | 0.032 | 17.2
25 |, 0.066 | 38.0 | 0.060 | 34.0 | 0.055 | 30.2 | 0.049 | 26.5 | 0.043 | 23.0 | 0.038 | 19.5
26 0.072 | 39.8 | 0.066 | 35.9 | 0.061 | 32.2] 0.055 | 28.6] 0.049 | 25.1 | 0.043 | 21.8 |
0006
27 0.078 | 41.5 | 0.073 | 37.8 | 0.067 | 34.0 | 0.061 | 30.6 | 0.055 | 27.2 | 0.050 | 23.9
23 | °°? | 0.085 | 43.2 | 0.079 | 39.5 | 0.073 | 35.9 | 0.067 | 32.5 | 0.062 | 29.1 | 0.056 | 25.9
29 | “°°°7 | 9.091 | 44.8] 0.085 | 41.1] 0.080 | 37.6 | 0.074 | 34.2 | 0.068 | 31.0 | 0.063 | 27.9
30 | °°" | 0.098 | 46.2 | 0.092 | 42.7 | 0.086 | 39.2 | 0.081 | 35.9 | 0.075 | 32.8] 0.069 | 29.7
31 | °°" | 0.105 | 47.6 | 0.099 | 44.2 | 0.093 | 40-8 | 0.088 | 37.5 | 0.082 | 34.4] 0.076 | 31.4
9°.0 9°.5 10°.0 10°.5 11°.0 RG°.S
Eng. In. ng. In. Eng. In. ng. In. Eng. In.
20 0.005| 3.4
a1 | °°? Fo.o10| 6.1]0.005| 27
a2 | °° 10.015] 8.8]0.010] 5.4
23 | °°° |o.021 | 11.4] 0.015 | 8.0
21 | °° | 0.026 | 13.9 | 0.020 | 10.6 0.009 | 4.5
} 25 | °° | 0.032 | 16.2 | 0.026 | 13.1 0.015 | 7.1|0.009| 4.2
0006 j
26 0.038 | 18.5 | 0.082 | 15.4 0.021] 9.5]0.015| 6.810.009] 4.1
27 | °° J 0.044 | 20.7] 0.038 | 17.7 0.027 | 11.9] 0.021 | 9.2] 0.015] 6.5
2g | 996 | 9.050 | 22.8 | 0.045 | 19.9 0.033 | 14.2] 0.027 | 11.5] 0.022 | 8.9
29 | °°°°7 10.057 | 24.9] 0.051 | 21.9 0.040 | 16.3} 0.034 | 13.7 | 0.028 | 11.1
30 | °°°°7 | 0.064 | 26.7] 0.058 | 23.8 0.046 | 18.4} 0.041 | 15.8 | 0.035 | 13.3
gif °°°°7 | 0.071 | 28.5 | 0.065 | 25.7 0.053 | 20.3 | 0.048 | 17.8 | 0.042 | 15.3

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0012.

90 PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit — Force of Vapor in English Inches. — Relative Humidity in Hundredths

Wet- Mean
Bulb

of Force
of Vapor

| Reta- |

Pabren- | Rela- | Rela- Rela-

heit. tive } tive tive tive
Force of, f{y- |Force of Hy- Force of, Hu- (Force of Py-

Vapor. | mid- | Vapor. | mid- Vapor. | mid- | Vapor. | mid-

ity. ity.

|! ° Eng. In. ' g In.) Eng. In.| feng. In.

1) sae 0.175 | 94.5 | 0.168 | 89.3 0.155 79.240.149 74.4
Be eae 0.182 | 94.7] 0.175 | 89.5 0.162 79.7} 0.156 | 75.0
Sap tice 0.189 | 94.8] 0.183 | 89.8 0.170 80.2 | 0.163 | 75.6
Bom [eek 0.197 | 94.9] 0.191 | 90.0 0.178 | 80.7| 0.171 | 76.2
36 0.205 95.01 0.199 | 90.3 0.186 | 81.1] 0.179 | 76.8

0009
Stet 0.214 95.2] 0.207 | 90.5 0.194 | 81.6 | 0.188 | 77.3
Sep oa 223 95.3 | 0.216 | 90.7 0.203 | 82.0} 0.196 | 77.9
2 aa 0.232 95.4} 0.225 | 91.0 0.212 | 82.4 | 0.206 | 78.4
40 oan 0.241 | 95.5 0.235 | 91.2 0.221 | $2.9 0.215 | 78.9
| 41 0.251 95.6] 0.244 | 91-4 0.231 | 83.3 0.224 | 79.4 |
| 0010 | ;
Baise? 0.260 | 95.7] 0.254 | 91.6 0.241 | 83.6 | 0.234 | 79.8

| 43 0.271 | 95.8 | 0.264 | 91.8 0.251 | 84.0} 0.245 | 80.3

Heda Weise 0.282 95.9 | 0.275 | 92.0 0.262 | 84.3] 0.255 | 80.7

1 45 8 0.293 | 96.0 | 0.286 | 92.1 0.273 | 84.7} 0.266 | 81-1

| 46 : eee 0.297 | 92.3 0.284 | 85.0} 0.278 | 81.5

| -0012 |

| ar Oe 0.316 | 96.21 0.310 | 92.5 0.297 | 85.3} 0.290 | 81.9
48 0.329 96.2] 0.322 | 92.6 0.309 | 85.6 | 0.302 | 82.2

Ik a ageaee 0.341 | 96.3 | 0.335 | 92.7 0.321 | 85.9} 0.315 | 82.6

It scales 0.354 | 96.4] 0.348 | 92.9 0.334 | 86.1 | 0.328 | 82.9

Rissacope mee 0.368 | 96.5 | 0.361 | 93.0 0.348 | 86.4] 0.341 | 83.2

«0014

| 52 ee aeanloss 0.375 | 93.2 0.362 | 86.7] 0.355 | 83.6
53 | 0.396 | 96.6 | 0.389 | 93.3 0.376 | 86.9 | 0.370 | 83.9

| 54 a 0.411 | 96.7 0.404 | 93.4 0.391 | 87.2 | 0.385 | 84.2

|| 55 ; 0.426 | 96.7} 0.420 | 93.5 0.407 | 87.4 0.400 | 84.4

ese o 4 cre 0.442 | 96.5 | 0.436 | 93.6 0.422 | 87.6 | 0.416 | 84.7

.0016

| 57 . 0.459 | 96.8] 0.452 | 93.7 0.439 | 87.8 | 0.432 | $5.0 |)
Balan. 0.476 96.9 | 0.469 | 93.9 0.456 | 88.0] 0.449 | 85.2 4
BG ah coe 0.498 | 96.9] 0.487 | 94.0 0.473 | 88.2 | 0.467 | 85.5 |!
GAP aera 0.511 | 97.0} 0.505 | 94.1 0.491 | 88.4] 0.485 | 85.7
Bho 0.530 97.0] 0.523 | 94.2 0.510 | 88.6 | 0.503 | 85.9
auras iseolena 0.542 | 94.2 0.529 | 88.8 | 0.522 | 86.2
63 | 0020 0.569 97.1] 0.562 | 94.3 0.549 | 89.0 | 0-542 | 86.4
gasaararne 0.589 | 97.2] 0.583 | 94.4 0.569 | 89.1 ose
65 cies 0.611 97.2] 0.604 | 94.5 0.591 | 89.3 | 0.584 | 86-8 |i
66 | °°? 10.639 | 100 | 0.633 | 97.3 | 0.626 | 91.6 0.612 | 89.5 | 0.606 | 87.0
67 -0023 | 0.662 | 100 | 0.655 | 97.3 | 0.648 | 94.7 0.635 | 89.6 o.eae sie

Mean Horizontal Difference of Force of Vapor for each 00.1 = 0.0018.

|

B 5A

Temperature, Fahrenheit. — Force of Vapor in English Inches — Relative Humidiiy in Hundredths.

-0030
-0031
oN -0032
80 -0033
8] -0634
82 +0035
20036
ES 0037
ss -0038
86 +0039
87 -0040
-0041

88
sy -0042
90 -0044
Ql -0045
92 20046
-0048

93
94 -0049
95 20050
96 -0051
97 -0053
98 -0054
20056

99
100 20057
101° -0059
102 -0060
103 -0062
| 104 -0063

PSYCHROMETRICAL TABLES.

1.691
1.744
1.798

1.854
1.911
1.970
2.030
2.092
2.155

98.1
98.1
98.1
98.1
98.1

98.1
98.2
98.2
98.2
98.2

98.2 |

98.0.

Rela-
tive
Hu-

mid-
ity

89.8
0.682 | 89.9
0.706 | 90.0
0.731 | 90.2
0.757 | 90.3

0.784 | 90.4
0.812 | 90.6
0.841 | 90.7
0.870 | 90.8
0.900 | 90.9

0.931 | 91.0
0.963 | 91.1
0.996 | 91.2
1.030 | 91.3
1.065 | 91.4

1.101 | 91.5
1.138 | 91.6
1.176 | 91.7
1.215 | 91.8
1.256 | 91.9

1.296 | 92.0
1.339 | 92.0
1.382 | 92.1
1.427 | 92.2
1.473 | 92.3

1.521 | 92.4
1.569 | 92.4
1.619 | 92.5
1.670 | 92.6
1.723 | 92.6
1.777.| 92.7

1.833 | 92.8
1.890 | 92.8
1.949 | 92.9
2.009 | 92.9
2.071 | 93.0
2.134

2°.8

tive
orce of Hu-
Vapor. |

0.651
0.675
0.699
0.725
0.751

0.924

0.956.

0.989
1.023
1.058

1.094
1.131
1.169
1.208
1.249

Eng In.) |
| 87.3
87.5 |
| 87.7
87.9
88.0

1.289
1.332
1.375
1.420
1.466

1.514

1.562 |

1.612
1.664
1.716
1.770

1.826

1.883 |
1.942 |
2.002 |
2.064 |
2.127 |

Rela-

| mid-
|. ity.

92

PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

t— t', or Difference of Wet and Dry Bulb Thermometers.

Wet- Mean {|————
Bulb { Vertical
Thermo- Difference 3°.0 3°85 4°.0 4°.5 5°.0
meter } of Force
t! of Vapor —- = :
Fahren- Ve ie Rela- Rela- Rela- Rela- Rela
heit. tive tive tive tive tive
Force of, j~y- {Force of} J~y- |Force of} Jyy- ‘Force of| jyy- |Force of} q{y
ce Vapor. mid- Vapor. mid- Vapor. mid- Vapor. mid- Vapor. mid-
ity ity. ity. ity. ity.
| ng. In Eng. In. Bog. In. ling. In. hEng In.
32 o.coo7 | 0242 | 69-8 | 0-186 | 65.3 | 0.129 | 61.0] 0.123 | 56.8 | 0.116 | 52.7
33 [age | 0-149 | 70-5 | 0.143 | 66.1] 0.136 | 61-9 | 0.130 | 57.7 | 0.123 | 53.7
BL | ogg | 0-157 | 71-2 | 0.150 | 66.9 | 0.144 | 62.8 | 0.137 | 58.6} 0.131 | 54.7
35 | oopg | 0-165 | 71-9 | 0.158 | 67.7 | 0.152 | 63.6 | 0.145 | 59.5 | 0.139 | 55.7
36 0.173 | 72.6 | 0.166 | 63.5 | 0.160 | 64.5 | 0.153 | 60.5 | 0.147 | 56.7
0008
| 87 | soog | 2-481 | 73-2 | 0-175 | 69.2 | 0.168 | 65.3 | 0.162 | 61.4] 0.155 | 57.7
38 | ooo | 0-190 | 73-8 | 0-183 | 69.9 ] 0.177 | 66.1] 0.170 | 62.3 | 0.164 | 58.7
© BDF) [+199 | 74-4 | 0-192 | 70.6] 0.186 | 66.9] 0.179 63.2] 0.173 | 59.7
40 | “og | 0-208 | 75.0] 0.202 71.3] 0.195 | 67.7] 0.189 64.1] 0.182 | 60.7
41 0.218 | 75.6] 0.211 | 72.0] 0.205 68.4}0.198 65.0] 0.192 | 61.7
-0010 |
42 | aig | 0-228 | 76-2 | 0.221 | 72.6 | 0.215 | 69.1 | 0.208 | 65.7 | 0.202 | 62.4
43 | "0, | 0-238 | 76.7 | 0.232 | 73.2] 0.225 69.8] 0.219 | 66.3 | 0.212 | 63.1,
44 | 7 ),,, [0-249 | 77-2 | 0.242 | 73.7 | 0.236 | 70.4 | 0.229 | 67.0 | 0.228 | 63.8
] 45 sory | 0°250 | 77-7 | 0.253 | 74.8 | 0.247 | 71.0 | 0.240 | 67.6 | 0.284 | 64.6
4B Ns 7: 0.271 | 78.1] 0.265 | 74.8 | 0.258 | 71.6 | 0.252 | 68.3 | 0.245 | 65.3
«0012
497 | org | 0-283 | 78-6 | 0.277 | 75.3] 0.270 | 72.2 | 0.264 | 68.9 | 0.257 | 66.0
48 0.296 | 79.0 | 0.289 | 75.8] 0.282 | 72.7 | 0.276 | 69.6 | 0.269 | 66.7
| 49 ht 0.308 | 79.4] 0.302 | 76.3 | 0.295 | 73.3 | 0.288 | 70.2 | 0.282.) 67.4
50 | ioig | 0-321 | 79-8 | 0.315 | 76.7 | 0.308 | 73.8 | 0.301 | 70.9 | 0.295 | 68.1
51 0.335 | 80.2 | 0.328 | 77.2 | 0.321 | 74.3 | 0.315 | 71.4 | 0.308 | 68.7
0014
52 Fogg | 0-349 | 80-5 | 0.342 | 77.6 | 0.835 | 74.7 | 06329 | 71.9 | 0.322 | 69.2
58 | 7115 | 0-363 | 80.9 | 0.356 | 78.0] 0.350 | 75.2 | 0.343 | 72.5 | 0.336 | 69.8
BA | iiig | 0-378 | 81-2] 0.871 | 73.4 | 0.365 | 75.6 | 0.358 | 72.9] 0.351 | 70.8
55 | org | 0393 | 81-6 | 0.387 | 78.8 | 0.380 | 76.1 | 0.873 | 73.4 | 0.367 | 70.8
56 0.409 | 81.9 | 0.403 | 79.1 | 0.396 | 76.5 | 0.389 | 73.9 | 0.383 | 71.3
0016
BT 0.426 | 82.2] 0.419 | 79.5 | 0.412 | 76.9 | 0.406 | 74.3] 0.399 | 71.8
58 | °°'7 10.443 | 82.5 | 0.436 | 79.8 | 0.429 | 77.2 | 0.423 | 74.8 | 0.416 | 72.3
59 | °°? | 0,460 | 82.8] 0.453 | 80.2 | 0.447 | 77-6 | 0.440 | 75.1 | 0.433 | 72.7
60 | °°°'8 | 0.478 | 83.1] 0.471 | 80.5 | 0.465 | 78.0 | 0.458 | 75.5 | 0.451 | 73.1
61 | “°°! 10.497 | $3.3] 0.490 80.8 | 0.488 | 78.3 0.477 | 75.9 | 0.470 | 73.5
0019
62 0.516 | 83.6 Serle 0.502 | 78.6 | 0.196 | 76.3 | 0.489 | 74.0
63 | °°? | 0.536 | 83.8] 0.529°| 81.4 | 0.522 | 79.0 | 0.516 | 76.6 | 0.509 | 74.3
64 | °°°?" | 0.556 | 84.1] 0.549 | 81.7] 0.543 | 79.3 | 0.536 | 77.0 | 0.529 | 74.7
65 | °°?! | 0.577 | 84.3| 0.570 | 81.9 | 0.564 | 79.6 | 0.557 | 77.3 | 0.550 | 75.1
66 | °°?” | 0.599 84.6 | 0.592 82.2 | 0.586 | 79.9 | 0.579 | 77.6 | 0.572 | 75-4
67 | °°3 | 0.622 | 84.8 | 0.615 | 82.4| 0.603 | $0.2 | 0.60 | 78.0 | 0.595 | 75.8

56

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018.

3°.

\Force of;
| Vapor.

Eng. In.
0.110
0.117
0.124
0.132
0.140

0.149
0.157
0.166
0.176
0.185

0.195
0.205
0.216
0.227
0.238

0.250
0.263
0.275
0.288
0.302

0.315
0.330
0.345
0.360
0.376

0.392
0.409
0.427
0.445
0.463

0.482
0.502
0.523
0.544
0.565
0.588

Rela-
tive
Ilu-
mid-

ity
48.8
50.0
51.2 |

2.3
35

on on

4

or
i
or

or

. ° .
or or Orv or

63.3
64.0
64.7
65.4
66.0 |

66.6
67.2
67.8
68.3
68.9
69.4
69.9 ||
70.3

70.8
71.3

PSYCHROMETRI SAL TABLES. 98

Temp-rature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredtha,

t— t’', or Difference of Wet and. Dry Bulb Thermometers.

| Wet- Mean => ——
| Bulb { Vertical
Thermo-Difference 3°.0 3°.5 4°.0 49.5 5°.0 5°.5
Me or vecc
iron for each Rela- Rela- | Rela- Rela- Rela Rela-
| heit 0».1. tive tive tive | tive | tive tive
| Force of) }{y- [Force of yyy- |Force of }{y- [Force of; yy- [Force of, y{y. |Force of, Fy-
Hy Vapor. | mid- | Vapor. | mid- | Vapor. | mid- | Vapor. | mid- | Vapor. | mia- | Vapor. | mia-
ity ity. ity. ity. ity. ity.
° Eng. In.| Eng. In. Eng. In.| ling. In.) Eng In. Eng. In.
63 | ooog | 0-644 | 85-0 | 0.638 | 82.7] 0.631 | 80.4] 0.624 | 78.3 | 0.618 | 76.1] 0.611 | 74.0
69 | ioo4 | 0-668 | 85.2} 0.661 | 82.9 | 0.655 | 80.7 | 0.648 | 78-6 | 0.641 | 76-4] 0.635 | T44
70 | ooa5 | 0-693 | 85-4 | 0.686 | 83.2] 0.679 | 81.0 | 0.672 | 78.8 | 0.666 | 76.8 | 0.659 | 74.7
TL | “ooog | 0-718 | 85-6] 0.711 | 83.4] 0.704 | 81.2 | 0.698 | 79.1 | 0.691 | 77.1 | 0.684 | 75.1
72 0.744 | 85.8 | 0.737 | 83.6 | 0.731 | 81.5 | 0:724 | 79.41 0.718 | 77.4] 0.710 | 75.4
0027
73 | gong | Or771 | 86-0 | 0.764 | 83.8 | 0.757 | 81.7] 0.751 | 79.7 | 0.744 | 77.6 | 0.737 | 75.7
71 | ooog | 9-799 | 86-2 | 0.792 | 84.0 | 0.785 | 81.9 | 0.778 | 79.9 | 0.772 | 77.9 | 0.765 | 76.0
73 1 sooo | 0-827 | 86-3 | 0.820 | 84.2 | 0.814 | 82.2 | 0.807 | 80.2 | 0.800 | 78.2 | 0.793 | 76.3
76 J ooaq | 02855 | 86-5 | 0-850 | 84.4] 0.813 | 82.4 | 0.836 | 80.4] 0.829 | 78.4] 0.823 | 76.6
17 0.887 | 86.7] 0.880 | 84.6 | 0.873 | 82.6 | 0.866 | 80.6 | 0.860 | 78.7] 0.853 | 76.8
-0031
73 | ogy | 9-918 | 86-8 | 0.911 | 81.8} 0.904 82.8 | 0.897 | 80.8 | 0.890 | 78.9} 0.884 | 77.1
79 | ogy | 0-919 | 87-0 | 0-943 | 85.0 | 0.936 | 83.0 | 0.929 | 81.1} 0.922 | 79.2! 0.916 | 77.4
80 | “song | 0-982 | 87-1 | 0-976 | 85.1 | 0.969 | 83.2 | 0.962 | 81.8 | 0.955 | 79.4] 0.919 | 77.6 |
81 | jos | 1-016 | 87-3 | 1-010 | 85.3 | 1.003 | $3.4 | 0.996 | 81.5 | 0.989 | 79.7 | 0.982 | 77.9 |
82 1.051 | 87.4] 1.045 | 85.5] 1.038 | 83.6 | 1.031 | 81.7 | 1.024 | 79.9 | 1.017 | 78.1
-0036
83 1.087 | 87.5 | 1.080 | 85.6 | 1.074 | 83.7 | 1.067 | 81.9 | 1.060 | 80.1 | 1.053 |
84 | 087 F.1244 87.7] 1.117 | 85.8 | 1.111 | $3.9} 1.104 | 82.1] 1.096 | 80.3 | 1.090 | 78.5 |
85 J? | 1.162 | 87.8] 1-155 | 85.9 1.148 | $4.1] 1.142 | 82.3] 1.135 | 80.5 | 1.128 | 78.8
36 | °°? 11.201 | 87.9] 1.194 | 86.1] 1.187 | 84.2 11.181 | 82.4 | 1.174 | 80.7] 1.167 | 79.0
P s7 | °° | 1.242 | 58.1] 1.235 | 86.2 | 1.228 | 84.4] 1.222 | 82.6 | 1.215 | 80.9 | 1.208 | 79.2
0041 i
88 1.282 | 88.2] 1.276 | 86.3 | 1.269 | 84.6 | 1.262 | 82.8] 1.255 | 81.11 1.248 | 79.4
g9 | ~°?? 11.395 | 88.3] 1.318 | 86.5 | 1.311 | 84.7] 1.304 | 83.0] 1.297 | 81.3] 1.291 | 79.6
90 | °°** | 1.369 | 88.4] 1.362 | 86.6 | 1.355 | 84.9 | 1.3484 83.1 | 1.341 | 81.41 1.334 | 79.8 |
or | “1° | 1.413 | 88.5] 1.407 | 86.7] 1.400 85.0 | 1.298 | 83.3] 1.386 | $1.6 | 1.879 | 80.0 |,
92 | °°! 11.460 | 88.6] 1.453 | 86.9 | 1.446 | 85.1] 1.439 | 83.4 | 1.432 | 81.8 | 1.425 | 80.2 |
0047 |
93 1.507 | 88.7] 1.500 | 87.0 | 1.493 | 85.3| 1.486 | 83.6 | 1.480 | 82.0 | 1.473 | 80.3
94 | °°? 11.556 | 88.8 | 1.5.49 | 87.1 | 1.542 | 85.4] 1.535 | 83.8 | 1.528 | 82.1 | 1.521 | 80.5
95 | “°° 11.606 | 88.9 | 1.599 | 87.2 | 1.592 | 85.5 | 1.585 | 83.9 | 1.578 | $2.3} 1.571 | 80.7
96 | °°! 11.657 | 89.0 | 1.650 | 87.3 | 1.643 | 85.7] 1.636} 84.0 | 1.629 | 82.4 | 1.622 |
97 | °°? 11.709 | 89.1] 1.702 | 87.5 | 1.696 85.8] 1.688 | 84.2| 1.682 | 82.6 | 1.675 | 81.0
98 | °°! 11.764. 89.2] 1.757 | 87.6 | 1.750 | 85.9] 1.743 | 84.3 | 1.736 | 82.7 1729 81.2
0055 |
99 1.819 | 89.3 | 1.812 | 87.7 | 1.805 | 86.0] 1.798 | 84.4 | 1.792 | 92.9 | 1.785 | 81.8
100 | °°°7 | 1.876 | 89.4] 1.869 | 87.8 | 1.863 | 86.2 | 1.856 | 84.6 | 1.849 | 83.0 | 1.842 | 81-3
101 { °° 11.935 | 89.5| 1.928 | 87.9 | 1.921 | 86.3 | 1.914 | 84.7 | 1.907 | 83.2 | 1.900
102 } °° | 1.995 | 89.6| 1.988 | 88.0] 1.981 | 86.4| 1.974 | 84.8 | 1.967 | 83.3 | 1.961
103 | °°°8 | 9.057 / 89.7} 2.050 | 88.1] 2.013 | 86.5 | 2.036 | 84.9 | 2.029 | 83.4 | 2.022
eo 0063 12.120 | 89.8] 2.113 88.2] 2.106 | 866 2.099 | 85.1 } 2.092 | 83.5 | 2.085

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018.
B 57

94 ' PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths

| ! |
t— t’, or Difference of Wet and Dry Bulb Thermometers. :

Wet- Mean i,
Bulb | Vertical )
Thermo- Ditference 6°.0 6°.5 ' 7.0 9°.8 $°.0 8°.5 f
meter { of Force }
t of Vapor
Fahren-| for each Rela- Rela Rela- Rela- | Rela- Rela-
heit. 0°.1. tive tive tive |. tive | tive tive |!
Force of| yyy- |Force of/ Hu- }Force of Hu- [Force of) Fu. | Ilu- |Force of} ty-
Vapor. | mid- | Vapor. | mid- | Vapor. | mid- Vapor. mid- | V mid- Vapor. | mid- |
ity. ity ity ity. ity. ity.
° E ing. In. Eng. In. Eng In. Eng. In, Eng. In.
32 | noo7 | 0-103 | 45:0] 0.097 | 41-4 | 0-090 | 37.9 | 0.084 | 34.5 | 31.2 10.071 | 28.0
33 Rit 0.110 | 46.3] 0.104 | 42.7] 0.097 | 39.3 | 0.091 | 36.0] 32.8 10.078 | 29.6
34 ae 0.118 | 47-6] 0.111 | 44.1] 0.105 | 40.7] 0.098 | 37.4 | 34.3 | 0.085 | 31.2
35 yaa 0.126 | 48.8] 0.119 | 45.3 | 0.113 | 42.0 | 0.106 | 38.8 | 35.7] 0.093 | 32.8
S6tMlier 0.134 | 50.0] 0.127 | 46.6} 0.121 | 43.3] 0.114 | 40.2 | 37.2 | 0.101 | 34.3
0009
87 noo | Ort | 51-1 | 0-136 | 47.8] 0.129 | 44.6 } 0.128 | 41.6 | 38.6 | 0.109 | 35.7
38 eae 0.151 | 52.2 | 0.144 | 49.0] 0.138 | 45.9] 0.131 | 42.9 | 40.0} 0.118 | 37.2
39 eax 0.160 | 53.3] 0.153 | 50.1 | 0.147 | 47.1 | 0.140 | 44.1] 41.3 | 0.127 | 38.5
40 ae 0.169 | 54.3] 0.163 | 51.3] 0.156 | 48.3] 0.149 | 45.4 42.6 | 0.136 | 39.9
41 | °°! 1.179 | 55.4] 0.172 | 52.3] 0.166 | 49.4 | 0.159 | 46.6 | 43.9 10.146 | 41.2
0010
42 0.189 | 56.3 | 0.182 | 53.4] 0.175 | 50.5 | 0.169 | 47.7 | 45.0] 0.156 | 42.4
43 | °°9!9 10.199 | 57.2] 0.192 | 54.3] 0.186 | 51.5] 0.179 | 48.8 | 46.1] 0.166 | 43.6
44 | °°"! 19 509 | 58.1] 0.208 | 55.3] 0.196 | 52.5 | 0.190 | 49.8 | 47.2 | 0.177 | 44.7
45 | °°! 19.590 | 59.0] 0.214 | 56.2 | 0.207 | 53.5 | 0.201 | 50.8 | 48.3 | 0.188 | 45.8
i} 46 | °°°!l 10.532 | 59.8 | 0.225 | 57.0 | 0.219 | 54.4] 0.212 | 51.8] 49.31 0.198 | 46.9
0012
47 0.244 | 60.6 | 0.237 | 57.9 | 0.231 | 55.2 | 0.224 | 52.7 50.2 | 0.211 | 47.9
48 | °°}? [0.056 | 61.3 | 0.249 | 58.7] 0.243 | 56.1 | 0.236 | 53.6 51.2 | 0.223 | 48.8
49 | °°°!3 | 9 969 | 62.0 | 0.262 | 59.4] 0.255 | 56.9 | 0.249 | 54.5 | 52.1] 0.236 | 49.7

50 | “Y°!8 | 0.282 | 62.7] 0.275 | 60.2 | 0.268 | 57.7 | 0.262 | 55.3 | 52.9 | 0.249 | 50.6

51 | °°°!8 10.295 | 63.4] 0.288 | 60.9 | 0.282 | 58.4] 0.275 | 56.1 | 53.7 | 0.262 | 51.5
0014 |

52 0.309 | 64.1] 0.302 | 61.6 | 0.296 | 59.2 | 0.289 | 56.8 | 54.6 | 0.276 | 52.3

53 | -9914 |o.393 | 64.7] 0.317 | 62.3 | 0.310 | 59.9 | 0.308 | 57.6 55.3 | 0.290 | 53.2

3| 56.1} 0.305 | 53.9

54 0015 | 9.338 | 65.3 | 0.332 | 62.9 | 0.325 | 60.6 | 0.318 | 58.
55 | °°! 10.354 | 65.9 | 0.347 | 63.5 | 0.340 | 61.2 | 0.334 | 59.
56 | °°'8 | 0.369 | 66.5 | 0.363 | 64.1 | 0.356 | 61.9 | 0.349 | 59.7

56.8 | 0.320 | 54.9
57.5 | 0.336 | 55.4

58.2 | 0.353 | 56.1
58.8 | 0.369 | 56.8
59.5 | 0.387 | 57.5
60.1] 0.405 | 58.1
60.7 | 0.423 | 58.7

58 0017 | 0.403 | 67.5 | 0.396 | 65.3 | 0.389 | 63.1 | 0.383 | 60.9
59 0017 19.420 | 68.0] 0.413 | 65.8 | 0.407 | 63.6 | 0.400 | 61.5 |
60 | -918 10.438 | 68.5] 0.431 | 66.3] 0.425 | 64.2 | 0.418 | 62.1
61 0018 10.457 | 69.0] 0.450 | 66:9 | 0.448 | 64.7 | 0.436 | 62.7

0019
62 0.476 | 69.5 | 0.469 | 67.4 | 0.462 | 65.3 | 0.456 | 63.2

63 -0020 10.495 | 70.0] 0.489 | 67.8 | 0.482 | 65.8 | 0.475 | 63.8
64 °0021 10.516 | 70.4] 0.509 | 68.3 | 0.503 | 66.3 | 0.496 | 64.3
65 0021 | 0.537 | 70.8] 0.530 | 68.8 | 0.524 | 66.8 | 0.517 | 64.8
66 0022 70.559 | 71.2 | 0.552 | 69.2 | 0.5-45 | 67.2 | 0.539 | 65.3
67 0023 10.581 | 71.6] 0.575 | 69.6 | 0.568 | 67.7] 0.561 | 65.7

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0013. |

61.3 | 0.442 | 59.3

61.8 | 0.462 | 59.9

62.4} 0.483 | 60.5

62.9 | 0.504 | 61.0

63.4] 0.525 | 61.6

63.9 | 0.549 | 62.1 |
|

20017
57 0.386 | 67.0 | 0.379 | 64.7] 0.373 | 62.5 | 0.366 | 60.3
|

PSYCHROMETRICAL TABLES. 95

Temperature, Fahrenheit. — Force of Vapor in English Inches — Relative Humidity in Hundredths.

re ens a aS a ee Ee TT]
: t—t, or Difference of Wet and Dry Bulb Thermometers.
4 Wet- | Mean =
Bulb | Vertical ;
Thermo- Difference 95 8°.0 | &°.5
| meter fof Force
ae t! of Vapor _———— am =
Fahren-{ for each Rela- Rela- Rela- { Rela-
heit. 0°.1. tive tive tive | tive
Force of} f{y- |Force off Hu- [Force of Hu- Force of Hu-
Vapor. | mid- | Vapor.| mid- | Vapor. | mid- | Vapor. | mid-
ity. ity. ity ity.
° ! 4 (Eng. In. Eng. In. \Eng In,|
Galas: 70.0 | 0.591 | 68.1 | 0.584 | 66.2 | 0.577 | 64:4 | 0.571 | 62.6
69 | ooo4 | 0-628 | 72.4 | 0.621 | 70.4} 0.614 | 68.5 | 0.608 | 66.6 | 0.601 | 64.8 | 0.594 | 63.0
70 | oors 1 0-652 | 72.7 | 0.646 | 70.8 | 68.9 | 0.632 | 67.1] 0.625 | 65.3} 0.619 | 63.5
71 | oor | 0-678 | 73-1 | 0.671 | 71.2 | 69.3 | 0.657 | 67.5 | 0.651 | 65.7 | 0.644 | 64.0
72 0.704 | 73.4 | 0.697 | 71.5 | 69.7 | 0.683 | 67.9 | 0.677 | 66.1 | 0.670 | 64.4
20027
73 | goag | 0730 | 73-8 | 0.724 | 71.9 | 70.1} 0.710 | 68.3 | 0.703 | 66.5 | 0.697 | 64.8
Raa ees | OovoSi\ 74-011 0:75) 72-2 70.4] 0.738 | 68.7] 0.731 | 66.9 | 0.724 | 65.3
73 | oso | 0-787 | 74-4 | 0.780 | 72.6 70.8 | 0.766 | 69.0 | 0.760 | 67.3} 0.753 | 65.7 |)
76 | ogy | 9-816 | 74-7 | 0.809 | 72.9 71.1] 0.796 | 69.4 | 0.789 | 67.7 | 0.782 | 66.1
717 0.846 | 75.0] 0.839 | 73.2 | 71.4] 0.826 | 69.7] 0.819 | 68.1} 0.812 | 66.4
0031
73 | oo39 | 9-877 | 75-3 | 0.870 | 73.5 | 71.8 | 0.857 | 70.1 | 0.850 | 68.4 | 0.843 | 66.8
79 | oag | 0-909 | 75-6 | 0.902 | 73.8 | 72.1] 0.888 | 70.4 | 0.882 | 68.8 | 0.875 | 67.2
80 | nosy | 0-942 | 75-8 | 0.935 | 74.1 72.41 0.921 | 70.7] 0.915 | 69.1 | 0.908 | 67.5
81 | iogs | 0-976 | 76-1 | 0.969 | 74.4 72.7 | 0.955 | 71.0] 0.948 | 69.4 | 0.942 | 67.9
82 1.011 | 76.41 1.004 | 74.6 73.0 10.990 | 71.3] 0.983 | 69.8 | 0.977 | 68.2
-0036
‘onary | 1:046 | 76.6 | 1.040 | 74.9 | 73.3 | 1.026 | 71.6] 1.019 | 70.1] 1.012 | 68.5
“sas | 1083 | 76.8 | 1.077 | 75.2 | 73.5 | 1.063 | 71.9 | 1.056 | 70.4] 1.019 | 68.8
“nose | L122 | 77-1] Ved | 75-4 | 73-8 11.101 | 72.2] 1.094 | 70.7] 1.087 | 69.1
“oozg | 17260 | 77-3 | 1-153 | 75.7 | 74.1] 1.140 | 72.5 | 1.133 | 70.9 | 1.126 | 69.4
1.201 | 77.5] 1.194 | 75.9 74.3 11.181 | 72.7] 1.174 | 71.2 | 1.167 | 69.7
-0040
‘ooay | E241 | 77.7] 1.285 | 76.1 74.6 | 1.221 | 73.0 | 1.214 | 71.5 | 1.207 | 70.0
“noag | 1-284 | 78-0] 1-277 | 76.4 74.8 | 1.263 | 73.3 | 1.256 | 71.8] 1.250 | 70.3
“sous | 1827 | 78-2] 1-321 | 76.6 75.0 | 1.307 | 73.5] 1-300 | 72.0 | 1.293 | 70.6
“soag | Ue872 | 78-4} 1.365 | 76.8 75.3 | 1.352 | 73.7] 1.345 | 72.3 | 1.338 | 70.8
1.418 | 78.6} 1.412 | 77.0] 75-5 11.398 | 74.0] 1.391 | 72.5 | 1.384 | 71.1
0047
‘qosg | 1186 | 78-8] 1.459 | 77.2 75.7| 1.445 | 74.2 | 1.438 | 72.8 | 1.431 | 71.3
“ogo | LDLA | 79-0 | 1.507 | 77.4 75.9 | 1.494 | 74.4] 1.487 | 73.0 | 1.480 | 71.6
°° 11.564 | 79.1 | 1.557 | 77.6 76.14 1.544 | 74.7| 1.537 | 73.2 | 1.530 | 71.8
ee 1.615 | 79.3] 1.608 | 77.8 | 76.3 | 1.595 | 74.9] 1.588 | 73.4] 1.581 | 72.1
* 11.668 | 79.5 | 1.661 | 78.0] 76.5 | 1.647 | 75.1 | 1.640 | 73.7 | 1.633 | 72.3
0004 | 1.722 | 79.7] 1.715 | 78.2 | 76.7| 1.701 | 75.3 | 1.694 | 73.9 | 1.688 | 72.5
0056 +
1.778 | 79.81 1.771 | 78.4] 76.9 | 1.757 | 75.5 | 1.750 | 74.1] 1.743 | 72.7
“0097 1 1.835 | 80.0 | 1.828 | 78.5 | 77.1 | 1.814 | 75.7 | 1.807 | 74.3] 1.800 | 72.9
0039 1 1.893 | 80.2 | 1.887 | 78.7 | 77.3 | 1.873 | 75.9 | 1.866 | 74.5 | 1.859 | 73.2
-0060 1 1.954 | 80.3 | 1.947 | 78.9 | 77.4 | 1.933 | 76.1] 1.926 | 74.7] 1.919 | 73.4
“0061 | 9.015 | 80.5 | 2.008 | 79.0 | 77.6 | 1.994 | 76.2 | 1.987 | 74.9 | 1.980 | 73.6
0063 | 2.078 | 80.6 | 2.071 | 79.2 | 77.8 | 2.057 | 76.4] 2.051 | 75.1] 2.044 | 73.8

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018. |

59

96

Wet-
Bulb

meter
t
Fahren-
heit

Mean
Vertical

Thermo-}Difference}

of Force

of Vapor

for each
Oo:

“orce of
Vapor.

Eng. In.
0.064
0.071
0.079
0.087
0.095

0.103
0.112
0.121
0.130
0.139

0.149
0.160
0.170
0.181
0.192

0.204
0.217
0.229

54.3
55.0
55.7
56.4
57.0

57.6
58.2
58.8
99.3
59.9
60.3

PSYCHROMETRICAL TABLES.

t— t’, or Difference of Wet and Dry Bulb Thermometers

9°,

Force of
Vapor

Eng. In
0.058
0.065
0.072
0.080
0.088

0.096
0.105
O.114
0.123
0.133

0.143
0.153
0.163
0.175
0.186

0.198
0.210
0.222
0.235

0.249

0.263
0.277
0.292
0.307
0.323

0.339
0.356
0.373
0.391
0.410

0.1429
0.449
0.469
0.490
0.512

0.534

5

Rela-
tive
Hu-
mid-
ity.

wNownw wp w

Mak ow vw
a = o1 WO ©

=
oo

31.8
33.3
34.8
36.2

37.5
38.7
39.9
41.1
42.2

43.3
44.3
45.3
46.3
47.2

48.1
49.0
49.8
50.7
51.4

52.2
52.9
53.6
54.3
55.0

55.6
56.3
56.9
57.5
58.0
58.6

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

ia

10°.0

tive t
Force of} }{y- |Force of} Hu-

Vapor.

Eng. In.

0.051
0.058
0.066
0.074
0.082

0.090
0.099
0.108
0.117
0.126

0.136
0.146
0.157
0.168
0.179

0.191
0.203
0.216
0.229
0.242

0.256
0.270
0.285
0.300
0.316

0.333
0.350
0.367
0.385
0.403

0.422
0.442
0.4162
0.483
0.505
0.527

Rela-

mid-
ity.

19.2
21.0
Die
24.4
26.0

27.6
29.2
30.7
32.2
33.7

35.0
36.3

10 .5

Vapor.

Eng. In
0.045
0.052
0.059
0.067
0.075

0.083
0.092
0.101
0.110
0.120

0.1390
0.140

37.6 [0.150

38.8 |
39.9

41.1
42.1
43.2
44.2
45.2

46.1
47.0
47.9
48.7
49.5

50.3
51.1
51.8
52.5
53.2

53.9
54.5
55.1
55.8
56.3
56 9

0.161

0.173

0.185
0.197
0.209
0.222
0.236

0.249
0.264
0.279
0.294
0.310

0.326
0.343
0.360
0.378
0.396

0.416
0.435
0.456
0.477
0.498
0.521

Rela-
lve

mid-
ity.

16.4
18.3
20.1
21.8
23.5

25.2
26.8
28.4
29.9
31.4

32.8
34.1
35.4
30.7
37.9

39.0
40.1
41.2
42.2
43.2

44.1
45.1
46.0
46.8
47.7

48.5
49.2
50.0
50.7
51.4

52.1

52.8

53.4
54.1
54.7
55.3

Li°.0

Rela-

tive
Force of| F{u-

Vapor.

Eng. In.

0.038
0.045
0.053
0.061
0.069

0.077
0.086
0.094
0.104
0.113

0.123
0.133
0.144
0.155
0.166

0.178
0.190
0.203
0.216
0.229

“tool
st 02

soso
nw

onwnnwhyh w

°
ow
oo -t

0.319
0.336
0.354
0.371
0.390

0.409
0.429
0.449
0.470
0.492
0.514

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018.

60

mid-
ity.
13.8
15:7
17.5
19.3
21.1

bo
bo

8

_

a ee ee
1 DD
SS -—

Nw
©
to

34.6

37.0
38.1

50.4
51.1
51.8
52.4
53.1
53.7

Li°.d |

Force of

Vapor.

Eng. In
0.032
0.039
0.046
0.054
0.062

0.070
0.079
0.088
0.097
0.107

0.116
0.127
0.137
0.148
0.160

0.171
0.184
0.196
0.209
0.222

0.236
0.250
0.265
0.281
0.296

0.313
0.330
0.347
0.365
0.383

0.102
0.422
0.442
0.463
0.485

| Rela-
tive
Hu-
mid-
ity.
11.2
St2
THe
16.9
18.7

20.4
22.1
23.8
25.4
27.0

28.4
29.8
31.2
32.5
33.8

35 0
36.1
37.2
38.3
39.3

40.3
41.3
A2.3
43.2
44.1

44.9
45.7
46.5
47.3
48.1

48.8

49.5 |

50.2 | -
50.8 |
51.5 |

0.507 | 52.1 |
|

'
'

1

Jee T

Tcmperature, Fahrenheit. —- Force of Vapor in English Inches. — Relative Humidity in Hundredths.

PSYCHROMETRICAL TABLES.

.
.

SSS 5858585858585 =
t — t’, or Difference of Wet and Dry Bulb Thermometers.
Mean
Vertical :
Difference 9°.0 9°.5 10°.0
of Force
of Vapor} ———__——
for each Rela- Rela- | Rela-
Qe at tive tive tive
[Force of jfu- {Force of, J~y- [Force of fu-
Vapor mid- Vapor. mid- _ Vapor. | mid-
ity. ity. ity.
lEng. In Eng. In. Eng. In.)
sconeg | 0-264 | 60-8 | 0.557 | 59-1] 0.550 57-4
“jo25 | 0°88 | 61-3 | 0.581 | 59.6 | 0.574 | 58.0
“s025 | O:812 | 61-8 | 0-605 | 60.1 | 0.598 | 58.5
“jong | 0:087 | 62-3 | 0.630 | 60.6 | 0.624 59.0
| 0.663 | 62-7 | 0.656 | 61.1 | 0.650 | 59.5
.0027 |
“qoaq | 0-390 | 63-2 |.0.683 | 61.6 | 0.677 | 60.0
“sovs | Or7}8 | 63-6] 0.711 | 62.0} 0.704 | 60.5
“sono | 0-746 | 64-0 | 0.739 | 62.5 | 0.738 |'60.9
“soa | Or779 | 64-4 | 0.769 | 62.9 | 0.762 | 61.3
| 0.805 | 64.8] 0.799 | 63.3 | 0.792 | 61.8
0031
“032 | 0-336 | 65.2 | 0.829 | 63.7 | 0.823 | 62.2 9.5
“aoag | 0°303 | 69-6 | 0.861 | 64.1 | 0.855 | 62.6 | 0. 0.841 | 59.7
“nosy | 0-202 | 66-0 | 0.894 | 64.5 | 0.897 | 63.0 | 0.881 0.874 | 60.1
yt | 0.935 66.3 0.928 | 64.8 | 0.921 | 63.4) 0.914 0.908 | 60.5
10.970 | 66.7 | 0.963 | 65.2 | 0.956 | 63.7 | 0.949 | 62.3 | 0.943 | 60.9
-0036 | t i
“cosy | 1:006 | 67-0 0.999 | 65.5 | 0.992 | 64.1} 0.985 0.978 | 61.3
“hoa | 12042 | 87-3] 1.036 | 65.9 | 1.029 | 64.4 | 1.022 1.015 | 61.7
“jon | 1080 | 67-7] 1.073 | 66.2] 1.067 | 64.8 | 1. 1.053 | 62.0
“joi | LLY | 68:0] 1-112 | 66.5 | 1.106 | 65.1 | 1.099 1.092 | 62.4
1.160 | 68.3] 1.153 | 66.8 | 1.146 | 65.4] 1 1.133 | 62.7
0041
cou | 17200 | 68-6] 1-194 | 67.1] 1.187 | 65.8} 1
11.243 | 68.9 | 1.236 | 67.4 | 1.229 | 66.1 |
99 J °°! [1.986 | 69.1] 1.279 | 67-7 | 1.273 | 66.4
91 | °° 11.331-| 69.4| 1.324 | 68.0| 1.317 | 66.7
92 | °° 11.377 | 69.7] 1.370 | 68.3 | 1.363 67.0
0047 §
93 11.425 69.9] 1.418 | 68.6 | 1.411 | 67.21
gs | °°°8 14.473 | 70.2] 1.466 | 68.8 | 1.459 | 67.5
95 | °°%° 11.528 | 70.4] 1.516 | 69.1 | 1.509 | 67.8] 1
96 | °°! 11.574 | 70.7] 1.567 | 69-4] 1.560 | 68.0] 1.
97 | °°? 11.627 | 70.9] 1.620 | 69.6] 1.613 | 68.3 | 1.606
‘gg | 79° 11.681 | 71.2] 1.674 | 69.8 | 1.667 | 68.5 | 1.
0056
99 1.736 | 71.4] 1.729 | 70.1] 1.722 | 68.8} 1.
100 | °° 14.793 | 71.6] 1.786 |'70.3 | 1.780 | 69.0 | 1.773
101 |. °°°° | 1.852 | 71.8} 1.845 | 70.5] 1.838 | 69.3 | 1.831
102 | °°°8 | 1.912 | 72.0] 1.905 | 70.8 | 1.898 | 69.5 | 1.891
103 | °° 14.974 72.3] 1.967 | 71.0] 1.960 | 69.7] 1.953
1041 | °°? | 9.037, 72.5 | 2.030 | 71.2] 2.023 | 69.9 | 2.016
Mean Horizontal Difference of Foree of Vapor for each 0°.1 = 0.0018.
B 61°

=

98 PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Iundredths.

t — t’, or Difference of Wet and Dry Bulb Thermometers.

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0013.

| Wet- Mean
| Bulb ¢ Vertical :
| Thermo- Difference 32°.0 32°.5 13°.0
meter | of Force
lhtahten- ae Suet Rela- | Rela- Rela-
| heit. os: tive tive tive tive
| Force of} ffy- [Force of} Jiu- [Force of! y{y- Hu-
Vapor. | mid- } Vapor. mid- Vapor. | mid- mid-
ity ity ity ity.
° Eng. In. Eng. In. Eng. In.
32 | S007 | 9:025) 88 0.019 | 6.410.012] 4.1
33 | oor | 0-032 | 10-8] 0.026 | 8.4/0.019] 6.2
81 | ono | 0-040 | 12-7] 0-033 | 10.41 0.027) 8.2
BS | og. | 0-048 | 14-6] 0-041 | 12.31 0.034 | 10.1
36 0.056 | 16.4] 0.049 | 14.2} 0.042 | 12.0
0008
37 | apo | 0-064 | 18-2] 0.057 | 16.0} 0.051 | 13.9
38 | og | 0:072 | 19-9 | 0.066 | 17.8] 0.059 | 15.7
39 | higg | 2:08 | 21-6] 0.075 | 19.5 | 0.068 | 17.5
| 40 corn | 0:09! | 23:3 | 0.084 | 21-2 | 0.078 | 19.2 6 ||
44 0.100 | 24.9] 0.094 | 22.8 | 0.087 | 20.8" 3 ||
0010
42 - 10.110 | 26.4] 0.103 | 24.3] 0.097 | 22.4
| 43 | °°! Jo 190 | 27.8 | 0.114 | 25.8 | 0.107 | 23.9
44 | °°! 10.137 | 29.2] 0.124 | 27.2] 0.118 | 25.3
45 | °°"! 10.142 | 30.5] 0.135 | 28.6 | 0.129 | 26.7
46 | °°! 1.153 | 31.8] 0.146 | 30.0] 0.140 | 28.1
-0012
47 0.165 | 33.0! 0.158 | 31.2} 0.152 | 29.3
48 | °°??? 10.177 | 34.2 | 0.170 | 32.4] 0.164 | 30.6
49 |. °9!3 79 190 | 35.3] 0.183 | 33.5 | 0.176 | 31.7
| 50 | °°°!3 10.902 | 36.4] 0.196 | 34.6 | 0.189 | 32.9
| 61 | °°°4 | 0.016 | 37-5] 0.209 | 35.7 | 0.202 | 34.0
.0014 ,
| 52 0.229 | 38.5} 0.223 | 36.8 | 0.216 | 35.1
53 0014 1 0,044 | 39.5 | 0.237 | 37.8 | 0.231 | 36.1
54 | °9915 | 9.959 | 40.5 | 0.252 | 38.8 | 0.245 | 37.1
55 | °°9'5 | o.074 | 41.5] 0.267 | 39.81 0.261 | 38.1
56 | °°16 | 9.090 | 42.4] 0.283 | 40.71 0.276 | 39.1 |
0016
57 0.306 | 43.2 | 0.299 | 41.6} 0.293 | 40.0
58 | °°17 19.393 | 44.1] 0.316 | 42.4] 0.310 | 40.8
59 0017 19.340 | 44.9 | 0.334 | 43.3 | 0.327 | 41.7 37.2
60 °0018 10.358 | 45.7] 0.351 | 44.1 | 0.345 | 42.5 38.1
61 -0018 | 9.376 | 46.4] 0.370 | 44.9 | 0.363 | 43.3 38.9
0019
62 0.396 | 47.2 | 0.389 | 45.6 | 0.382 | 44.1 39.8
63 0020 10.415 | 47.9] 0.409 | 46.4 | 0.402 | 44.8 41.9 | 0.382 | 40.6
64 | -°°21 10.436 | 48.6] 0.429 | 47.1 | 0.422 | 45.6 | 0.402 | 41.3
65 20021 10.457 | 49.3] 0.450 | 47.8 | 0.443 | 46.3 43.4 | 0.423 | 42.1
66 | -°922 10.478 | 49,9 | 0.472 | 48.4 | 0.465 | 47.0 0.445 42.8 |
G7 0023 10.501 | 50.6 | 0.494 | 49.1 | 0.487 | 47.6 |
|

62

Yemy erature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

PSYCHROMETRICAL TABLES.

99

ie SSS
t — t’, or Difference of Wet and Dry Bulb Thermometers.
Wet- Mean
Bulb | Vertical
Thermo-jDifference 12°.0 12°.5 14°.5
meter jof Force
t! of Vapor
Fahren-] for each Rela- Rela- | Rela- Rela- * | Rela-
heit. O°.1. tive tive tive tive tive
Force of} f{y- fForce of! Hu- Force of] J{y- [Force of] Hy-.|Force of} Hu-
Vapor. | mid- | Vapor. | mid- -| mid- | Vapor. | mid- | Vapor. | mid-
ity. ity. ity. ity. ty.
° Eng. In Eng. In. ‘Eng. In Eng In.
6S | y.ooo4 | 0-324 | 51-2] 0.517 | 49.7 46.9} 0.497 | 45.5] 0.490 | 44.1
69 | ooo4 | 0-547 | 51-8 | 0.5.41 | 50. 47.5 | 0.520 | 46.1] 0.514 | 44.8
70 | coos | 0-572 | 52-4 | 0.565 | 50.9 48.1] 0.545 | 46.8 | 0.538 | 45.5
71 | org | 0-397 | 52.9 | 0.590 | 51.5 48.7 | 0.570 | 47.4 | 0.563 | 46.1
72 0.623 | 53.5 | 0.616 | 52.1 49.3 | 0.596 | 48.0] 0.589 | 46.7
0026
73 1 poor | 0-650 | 54.0 | 0.618 | 52.6 51.3 | 49.9 | 0.623 | 48.6 | 0.616 | 47.3
7 | “ooog | 9:677 | 54-5 | 0.670 | 53.2] i 50.5 | 0.650 | 49.2 | 0.643 | 47.9
75 | ooo | 0-705 | 55-0 | 0.699 | 53.7 | 52.3] 51.0 | 0.678 | 49.7 | 0.672 | 48.4
76 | cao | 0-735 | 55-5 | 0.728 | 54.2 2. 51.5] 0.708 | 50.3 | 0.701 | 48.9
7 0.765 | 56.0] 0.759 | 54.7 52.1] 0.739 | 50.8 | 0.731 | 49.5
0031
73 | soso | 0-796 | 56-5] 0.782 | 55.2 52.5 | 0.768 | 51.3 | 0.762 | 50.0
79 | ooag | 0-827 | 56-9 | 0.821 | 55-6 53.0 | 0.800 | 51.8 | 0.794 | 50.5
80 | ony | 0-860 | 57-3] 0.858 | 56.1 54.8 | 53.5 | 0.833 | 52.2 | 0.826 | 51.0
81 | jogs | 0-894 | 57-8 | 0.887 | 56.5 53.9 | 0.867 | 52.7] 0.860 | 51.4
82 0.929 | 58.2 | 0.922 | 56.9 55.6 | 54.4] 0.902 | 53.2 | 0.895 | 51.9
0036
83 | ogy | 0983 | 58:6 | 0.958 | 57.3 54.8 | 0.937 | 53.6 | 0.931 | 52.4
84 | say | 1:002 | 59.0 | 0.995 | 57.7 55.2] 0.974 | 54.0] 0.968 | 52.8 |
85 | ivog | 1-039 | 59-4] 1.033 | 58.1 55.6} 1.012 | 54.4] 1.005 | 53.2
86 | oso | 12078 | 59-7] 1.071 | 58-5 56.0] 1-051 | 53.8 | 1.044 | 53.6
87 1.119 | 60.1} 1.112 | 58.8 56.4) 1-092 | 55.21 1.085 | 54.0
0041
88 | gg | 1159 | 60-5 | 1.152 | 59.2 | 56.8 | 1.132 | 55.6} 1.125 | 54.4
89 | ogy | 1-202 | 60-9 | 1-195 | 59.6 ] 1. 57.1| 1-174 | 56.0 | 1.167 | 54.8
90 | vious | 1-245 | 61-31 1.288 | 59.9} 1.251 | 58.7] 57.5 | 1-218 | 56.3] 1.211 | 55.2
91 | agg | 12290 | 61-6 | 1-283 | 60.2 | 1.276 | 59.0 57.9 | 1.263 | 66.7 | 1.256 | 55.6
92 1.336 | 61.9 | 1.329 | 60.6] 1.322 | 59.4] 58.21 1.309 | 57.0 | 1.302 | 55.9
©0047 ;
| 93 1.383 | 62.2] 1.376 | 60.9 | 1.370 | 59-7 58.5 | 1.356 | 57.4] 1.349 | 56.3
of | °° | 1.432 | 62.5 | 1.425 | 61.2 | 1.418 | 60.0 58.9 | 1.404 | 57.7 | 1.297 | 56.6
95 |. °°? | 1.482 | 62.7] 1.475 | 61.5 | 1.468 | 60.4] 59.2| 1.454 | 58.1] 1.447 | 57.0
| 96 | °°! | 1.538 | 63.0] 1.526- 61.8 | 1.519 | 60.7 59.5 | 1.505 | 58.4] 1-498'| 57.3
97 | °°? [1.585 | 63.3 | 1.578 | 62.11 1.571 | 61.0 59.8 | 1.558 | 58.7] 1.551 | 57.6
' gg | 4 11.639 | 63.6 | 1.632 | 62.4] 1.625 | 61.3 60.1] 1.612 | 59.0] 1.605 | 57.9 |
20056 )
| 99 1.695 | 63.9] 1.688 | 62.7} 1.681 | 61.6 60.4 | 1.667 | 59.3] 1.660 , 58.2 |
100 § °©°57 14.752 | 64.2] 1.745 | 63.0] 1.738 | 62.0] 60.7) 1.724 | 59.6] 1.717! 58.5 |
101 | °°? [1.810 | 64.4] 1.903 | 63.2] 1.797 | 62.3 | 61.0} 1.783 | 59.9 | 1.776 | 58.8 |
102 f °° 11.870 | 64.7] 1.863 | 63.5 | 1.857 | 62.6 61.3 | 1.843 | 60.2 | 1.836 59.1 |
| 103 | “°° | 1.932 | 64.9 | 1.925 | 63.8] 1.918 | 62.9] 61.5} 1.904 | 60.4] 1.897 | 59.4 |
| 104 | °° | 1.995 | 65.2] 1.988 | 64.0] 1.981 | 63.2 61.8 | 1.967 | 60.7] 1.960 | 59.6

63

PSYCHROMETRICAL TABLES.

100
Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.
ies a: SSS SEE —
| t— t', or Difference of Wet and Dry Bulb Thermometers,
Wet- Mean
Bulb | Vertical
Thermo-PPitlerence] 950Q | B5°.S | 16°.0 | 16.5
meter | of Force
t of Vapor —s
Fahren- | for each Rela- Rela- Rela- | Rela- Rela-
heit. 0°.1. tive tive tive tive tive
Hu- (Force of} Hu- [Foree of) Hu- [Force of} Hu- Hu- [Force of} yyy. |}
mid- | Vapor. | mid- | Vapor. | mid- | Vapor. | mia- fi mid-
ity. ity. ity. ity. ity.
° Eng. In Eng. In :
32
33
34
35
36 4.4
37 6.4]0.018 | 4.6
38 8.310.027 | 6.510.020] 4.8 3.2
39 10.1] 0.036 | 8.4] 0.029| 6.7 5.1 2.1
40 11.9 | 0.045 | 10.1] 0.038 | 8.5 6.9 3.9
Al 13.6 | 0.054 | 11.8} 0.048 | 10.3 8.7 5.7
42 15.1 | 0.064 | 13.4] 0.058 | 11.9 10.3 7.4 |
43 16.6 ; 0.074 | 15.0) 0.068 | 13.4 LIS, 9.0
i} 44 18.1 | 0.085 | 16.5 | 0.078 | 15.0 13.5 10.6
45 19.6 } 0.096 | 18.0 | 0.089 | 16.5 15.0 12.1
46 21.0] 0.107 | 19.4] 0.100 | 17.9 16.4 13.6
47 22.4] 0.119 | 20.8 } 0.112 | 19.3 17.9 15.1
| 48 23.81 0.131 ; 22.2 | 0.124 | 20.7 19.3 16.5
49 25.1] 0.143 | 23.6 | 0.137 | 22.1 20.7 17.9
50 26.4] 0.156 | 24.9 |] 0.150 ! 23.4 22.0 19.3
51 27.6 | 0.169 | 26.1 | 0.163 | 24.6 23.2 20.6
52 28.7] 0.183 | 27.3 | 0.177 | 25.8 24.4 21.8
53 29.9] 0.197 | 28.4} 0.191 | 27.0 25.6 23.0
54 30.9 | 0.212 | 29.5 | 0.206 | 28.1 26.7 24.1
55 32.0 | 0.228 | 30.6 | 0.221 | 29.2 27.8 25.2
56 33.0 | 0.243 | 31.6 | 0.237 | 30.2 25.9 26.3
57 34.0 | 0.260 | 32.6 ] 0.253 | 31.2 29.9 27.3
58 34.9 | 0.276 | 33.5 | 0.270 | 32.2 30.8 28.3
i} 59 35.8 | 0.294 | 34.4 | 0.287 | 33.1 | 31.8 29.3
60 36.7] 0.311 | 35.3 | 0.305 | 34.0] 0.298 | 32.7 30.2
61 37.5 | 0.330 | 36.2 | 0.323 | 34.9 | 0.316 | 33.6 31.2
62 38.4 | 0.349 | 37.0 | 0.342 | 35.7 | 0.336 | 34.5 32.0
| 63 39.2 10.369 | 37.9 } 0.362 | 36.6 | 0.355 | 35.3 32.9
; 64 40.0 | 0.389 | 38.7 | 0.382 | 37.4 | 0.376 | 36.1 33.7
| 65 40.7] 0.410 | 39.4 | 0.403 | 38.2 | 0.396 | 36.9 34.5
| 66 41.5] 0.431 | 40.2 { 0.425 | 38.9 | 0.418 | 37.7 35.3
» OF 42.21 0.454 | 40.9 | 0.447 | 39.6 | 0.440 | 38.4 36.1
| Mean Horizontal Difference of Force of Vapor for each 0°.1 = 9.0013.
i—— ee,
B 64

PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

t— t/, or Difference of Wet and Dry Bulb Thermometers.

2 15°.0 15°.5 16°.0
of Force
of Vapor —
for each Rela- Rela- Rela-
Force of oe oe Force of ee
Vapor. | mid- mid- | Vapor. mid- | Vapor.
ity ity. | ity.
Eng. In Eng. In.| Eng. In. Eng. In
0.483 | 42.8 41.6 | 0.470 | 40.3 | 0.463 | 39.1 | 0.456 | 37.9
0.507 | 43.5 42.3] 0.594 | 41.0 | 0.487 | 39.8 | 0.480 | 38.7
0.531 | 44.2 42.9 | 0.518 | 41.7] 0.511 | 40.5 | 0.504 | 39.3
0.556 | 44.8 43.6 | 0.543 | 42.4] 0.536 | 41.2 | 0.529 | 40.0
0.582 | 45.4 44.2 | 0.569 | 43.0 | 0.562 | 41.8 | 0.555 | 40.7
0.609 | 46.0 44.8 | 0.596 | 43.6 | 0.589 | 42.4] 0.582 | 41.3 | 0.575 | 40.2
0.637, | 46.6 45.4 | 0.623 | 44.21 0.616 | 43.0] 0.610 | 41.9 | 0.603 | 40.8
0.665 | 47.2 46.0 | 0.651 | 44.8 | 0.645 | 43.6 | 0.638 | 42.5] 0.631 | 41.4
0.694 | 47.7 46.5] 0.681 | 45.4] 0.674 | 44.2 | 0.667 | 43.1 | 0.660 | 42.0
0.724 | 48.2 47.1 | 0.711 | 45.9 | 0.704 | 44.8 | 0.697 | 43.6 | 0.690 | 42.6
0.755 | 48.8 47.6 | 0.741 | 46.4] 0.735 | 45.3 | 0.728 | 44.2 | 0.721 | 43.1
0.787 | 49.3 48.1] 0.773 | 47.0 | 0.766 | 45.8 | 0.760 | 44.7 | 0.753 | 43.7
0.820 | 49.8 48.6 | 0.806 | 47.5 | 0.799 | 46.4] 0.792 | 45.3 | 0.786 | 44.2
0.853 | 50.3 49.1 | 0.840 | 48.0 | 0.833 | 46.9] 0.826 | 45.8} 0.819 | 44.6
0.888 | 50.7 49.6 | 0.875 | 48.5] 0.868 | 47.4] 0.861 | 46.3 | 0.854 | 45.1
0.924 51. 50.0 | 0.910 | 48.9 | 0.903 | 47.8 | 0.897 | 46.8 |] 0.890 | 15.6 |
0.961 | 51. 50.5 | 0.947 | 49.4 | 0.940 | 48.3 | 0.933 | 47.2 | 0.927 | 46.2 |
0.998 | 52. 50.9 | 0.985 | 49.8 | 0.978 | 48.7] 0.971 | 47.7 | 0.964 | 46.6
1.037 | 52. 51.3 | 1.024 | 50.3 | 1.017 | 49.2] 1.010 | 48.1 | 1.003 | 47.1
1.078 | 52. 51.8 | 1.064 | 50.7] 1.058 | 49.6] 1.051 | 48.6 | 1.044 | 47.5
1.118 | 53.3 52.2] 1.105 | 51.1] 1.098 | 50.0] 1.091 | 49.0] 1.084 | 48.0
TAG | osed 52.6 | 1.147 | 51.5} 1.140 | 50.4] 1.133 | 49.4] 1.126 | 48.4
1.204 54. 53.0] 1.190 | 51.9 | 1.183 | 50.9 | 1.177 | 49.8] 1.170 | 48.8
1.249 | 54.5 53.4 |] 1.235 | 52.3 | 1.228 | 51.2 | 1.221 | 50.2 | 1.215 | 49.2
1.295 | 54.8 | 53.7] 1.281 | 52.7} 1.274 | 51.6 |] 1.267 | 50.6 | 1.260 | 49.6
1.342 | 55. 54.1 | 1.328 | 53.0] 1.3821 | 52.0] 1.315 | 51.0] 1.308 | 50.0
1.390 | 55. 54.4] 1.377 | 53.41 1.370 | 52.4] 1.363 | 51.4 | 1.356 | 50.4
1.440 | 55. 54.8 | 1.426 | 53.7] 1.420 | 52.7] 1.413 | 51.7] 1.406 | 50.7
1.491 | 56. 55.1 | 1.477 | 54.11 1.471'| 53.1 | 1.464 | 52.1] 1.457 | 51.1
1 1.544 | 56. 55.5 | 1.530 | 54.4] 1.523 | 53.4] 1.516 | 52-4] 1.509 | 51.5
1.598 | 56.8 55.8 | 1.584 | 54.8] 1.577 | 53.8] 1.570 | 52.8 | 1-563 | 51.8
1.653 | 57.2 56.1 | 1.639 | 55.1] 1.633 | 54.1] 1.626 | 53.1] 1.619 | 52.1
1.710 | 57.5 56.41 1.696 | 55.4] 1.690 | 54.4] 1.683 | 53.4] 1.676 | 52.5
1.769 | 57.8 56.7 | 1.755 | 55.7] 1.748 | 54.7] 1.741 | 53.7 | 1.734 | 52.8
1.829 | 58.0 57.0} 1.815 | 56.0] 1.809 | 55.0] 1.802 | 54,0] 1.794 | 53.1 |
1.890 | 58.3 57.3 | 1.876 | 56.3 | 1.869 | 55.3 | 1.863 | 54.3] 1.856 | 53.4
1.953 | 58.6 57.6 | 1.939 | 56.6 | 1.932 | 55.6 | 1.925 | 54.6] 1.919 | 53.7

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0013.

|

65

102 PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

I

t— t’, or Difference of Wet and Dry Bulb Thermometers.

}
| Wet- Mean
| Bulb | Vertical
Thermo-Difference
meter | of Force
t of Vapor
Fahren-] for each

1s°.0 18°.5 19°.0 19°.5

Rela- | Rela- | Rela- Rela-

heit. Or rs | tive tive tive tive J
Force of; jyy- [Force of Hu- |Force of Hy- |Force of, qy- orce Of Fy-
Vapor. | mia- | Vapor. | mid- j Vapor. |- mid- | Vapor. | miq- | Vapor. | mid- | Vapor. | add
ity. ee ose ity. | ity. | ity.
° ing. In. Eng. In.| Eng. In. Eng. In. Eng. In. ng. In| |
32
33 |
34
35
| 36
37 |
:
39
a . li
41 | °°! 10.022} 4.310.015! 3.010.009] 1.6 |
-0010
42 0.031 6.0]0.025| 4.6]0.018| 3.3]0.012| 2.1
43 | “°°!° [o.041| 7.6] 0.035 | 6.3] 0.028| 5.0] 0.022] 3.710.015! 2.6
44 | “ll 10.052 | 9.2] 0.045 | 7.9]0.039| 6.6] 0.032] 5.4/0.026| 4.3]0.019| 3.2
45 | “°°!' 10.063 | 10.8] 0.056 | 9.5][0.050| s.2]0.043| 7.0)0.037| 5.9]0.030] 4.8
46 | “°°'! 10.074 | 12.3] 0.068 | 11.0] 0.061| 9.7] 0.054] 8.5}0.048| 7.5]0.011| 6.3 |
0012
47 0.086 | 13.8 | 0.079 | 12.5] 0.073 | 11.2 | 0.066 | 10.0]0.059 | 9.0]0.053| 7.9
48 | “°°? 10.098 | 15.2] 0.091 | 13.9] 0.085 | 12.7 | 0.078 | 11.5 |.0.072 | 10.4] 0.065 | 9.3
49 | °°!8 10.110) 16.6] 0.104 | 15.4] 0.097 | 14.1] 0.091 | 12.9] 0.084 | 11.9] 0.077 | 10.7
50 | °°! J0.123 | 18.0] 0.117 | 16.7] 0.110 | 15.5 | 0.103 | 14.4] 0.097 | 13.2 | 0.090 | 12.1
51 | °°? [0.136 | 19.3] 0.130 | 18.0] 0.123 | 16.8 | 0-117 | 15.7] 0.110 | 14.5 | 0.103 | 13.4
| 59 sai 0.150 | 20.5 | 0.144 | 19.3 | 0.137 | 18.1] 0.130 | 16.9 | 0.124 | 15.7] 0.117 | 14.6
53 | -°°!4 10.164 | 21.7] 0.158 | 20.5] 0.151 | 19.3 | 0.145 | 18.2 | 0.138 | 16.9 | 0.131 | 15.8
54 0015 19.179 | 22.9] 0.173 | 21.7] 0.166 | 20.5 | 0.159 | 19.3 | 0.152 | 18.1] 0.146 | 17.0
55 | °°?! 10.194 | 24.0] 0.188 | 22.8] 0.181 21.6] 0.174 | 20.5} 0.168 | 19.2] 0.161 | 18.2 |
56 | *°°18 | 0.210 | 25.1] 6.203 | 23.9 | 0.197 | 22.7] 0.190 | 21.6] 0.184 | 20.4] 0.177 | 19.3
57 ea 0.226 | 26.1] 0.220 | 24.9] 0.213 | 23.8] 0.206 | 22.7] 0.200 | 21.54 0.193 | 20.4 |
58 | “8917 | 0.243 | 27.1] 0.236 | 25.9 | 0.230 | 24.8 | 0.223 | 23.7] 0.217 | 22.6] 0.210 | 21.5
59 ‘0017 19.260 | 28.1 | 0.254 | 26.9] 0.247 | 25.8 | 0.240 | 24.7] 0.234 | 23.6} 0.227 | 22.6
60 | -°°'8 | 0.278 | 29.0] 0.271 | 27.9 | 0.265 | 26.8 | 0.258 | 25.7 | 0.251 | 24.6 | 0.245 | 23.6
61 *0019 | 9.296 | 30.0 | 0.290 | 28.8 | 0.283 | 27.7] 0.276 | 26.6 | 0.270 | 25.5 | 0.263 | 24.5
62 |’ lo.si6 30.9 | 0.309 | 29.7 | 0.302 | 28.6] 0.295 | 27.5] 0.289 | 26.5 | 0.282 | 25.4
63 0020 | 0.335 | 31.7] 0.328 | 30.6 | 0.322 | 29.5] 0.315 | 28.4] 0.308 | 27.4 | 0.302 | 26.4 |
64 -0020 10.355 | 32.6] 0.349 | 31.5] 0.342 | 30.4] 0.335 | 29.3 | 0.329 | 28.2 | 0.322 | 27.2
65 °0021 10.376 | 33.4] 0.370 | 32.3 | 0.363 | 31.2 | 0.356 | 30.1 | 0.350 | 29.1] 0.343 | 28.1
66 | -0°22 10.398 | 34.2 | 0.391 | 33.1] 0.385 |'32.0 | 0.378 | 30.9 | 0.371 | 29.9 | 0.364 | 23.9
67 -0023 10.420 | 34.9] 0.414 | 33.8 | 0.407 | 32.8 | 0.400 | 31.7 | 0.393 | 30.7 | 0.387 | 29.7

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018.

_B 66

Temperature, Fahrenheit. — Force of Vapor in English Inches — Relative Humidity in Hundredths.

is°.0

Force of|
Vapor.

Eng. In.
0.443
0.467
0.491
0.516
0.542

0.569
0.596
0.624
0.654
0.683

0.714
0.746
0.779
0.813

0.847

0.883
0.920
0.958
0.996
1.037

1.077
1.119
1.163
1.208
1.254

1.301
1.349
1.599
1.450
1.502
1.556

1.612
1.669
1.727
1.787
1.849
1.912

Rela-
tive
Hu-

mid-

ity.

PSYCHROMETRICAL TABLES.

18°.5

Force of
Vapor.

Eng. In.
0.436
0.460
0.484
0.509
0.535

0.562
0.5389
0.618
0.647
0.677

0.707
0.739
} 0.772
0.806
0.840

0.876
0.913
0.951
0.989
1.030

1.070
1.113
1.156
201
«247

-294
-342
-392
443
-A95
-D49

-605
-662
-720
-780
1.842
1.905

Rela-

tive |
Hu- |

mid-

or or

or or cr or

—_—— — © © ©
io mt © & by

19°.0

67

Rela-

mid-

t—t’, or Difference of Wet and Dry Bulb Thermometers.

Vapor.

0.863
0.899
0.937
0.976
1.017

1.057
1.099
1.142
1.187
1.233

to
So

ue
©

©

i OY
@ t 2h oO
oH

rs
wo

or
oe
aD

39

19°.5 —

Rela-

tive tive
Hu- Force of} Jfu- jForce of

mid-
ity.

32.5
33.2
33.9
34.6
35.3

36.0
36.6
37.3
37.9
38.5

39.

40.
40.
41.

NNaS

bo

41
42.
42.
43.

43.

anuw

44.1
44.5
45.0
45.4
45.8

46.2
46.6
47.0
47.3
47.7
48.1

48.4
48.8
49.1
49.4
49.8
50.1

20°.0

Vapor. |
|

Eng. In.)
0.416
0.440 |
0.464
0.489
0.515

for}
~)

Or m=
=}

erenororo
onwtn =)
ow
ow

bo
o

0.856 |
0.893
0.930 !
0.969
1.010

1.050
1.092
1.136
1.180 |

_
bo

Sw)
a

4

bo

we

bo

bh im ws be

-_ — — _— —
er. 1 tei .
or

on
NAN QN 9
bo

©

_
or
.
i

1.641
1.700
1.759
1.821

1.884

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018.

Rela-
tive
Hu-

mid-
ity.

31.4
32.2
32.9
33.6

| 34.3

ow oO
SD or ox
wrt o

ow

| 37.5

38.1

| 38.6

39.2
39.7
40.2

40.7
41.3
41.8
42.3
42.7

43.2
43.6
44.1
44.5
44.9

45.3

| 45.7

46.1
46.5
46.8
47.2

47.5
47.9
48.2
48.6
48.9
49.2

tiv
Force of} Hu- ||

Vapor.

Eng. In.

0.409
0.433
0.457

0.482 |

0.508

Dw
m— DO OV

oeose
So

DD oro o
oO

on
Oo

0.680
0.712

0.745 |

0.779
0.813

|
|
20°.5 |

| Rela- ||
Sel

mid-
ity.

|
| |

| 30.4 ||
| 31.2
31.9
32.7
33.4

34.0 |}
BY
35.3
35.9
| 36.5 |

Sie
37.7
38.3
38.8
39.4

39.9
| 40.4
| 40.9

Heme ple
fmt ae
mw

he
ho bp

ee t. do
He OO OO
on Ww *

ee
i He
CO he

| 45.2
45.6
46.0
46.3

FSYCHROMETRICAL TABLES.

Temperature, Fahrenhvit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

i = al
| t—t’, or Difference of Wet and Dry Bulb Thermometers. ,
| Wet- Mean =
Bulb | Vertical
nero. Difference] 210.0 21.5 22°.0 22°.5 23°.0 23°.5
t of Vapor —j- - ——_______
| Fahren- for each Hele Rela- Rela- Rela- | Ret Hoe if Rela-
heit. Oo: tive tive tive tive
Force of, ae Force of} J{u- }Force of, [fu- {Force of| pty- |Force of, aye orce of} Fyy-
| Vapor. | yia- | Vapor. mid- Vapor. | mid- | Vapor. | mid- }| Vapor. | mid- | Vapor. | miq-
ity. ity: ity ity. eee ity.
°. Eng. In. Eng. In. Eng. In. Eng. In. Eng. In Eng. In.
32
33
34
35
36 |
37
| 38
39
40
4l
42
43
A4 0.013 | 2.0
45 | °°! 10.023] 3.7]0.017| 2.610.010] 1.6
46 | °°! 10.035] 5.210.028] 4.2}0.022! 3.1] 0.015
| 0012 *
AT 0.046} 6.8] 0.040] 5.710.033 | 4.7] 0.027 0.020 ze 0.013 | 1.8
48 0012 19.058 | 5.2] 0.052] 7.2]0.045| 6.21 0.039 0.032 0.025, 3.3
49 0013 19.071 | 9.7] 0.064] 8.610.058] 7.6] 0.051 0.044 0.038 | 4.7,
50 “0013 19.984] 11.01 0.077 | 10.0] 0.070 | 9.0] 0.064 0.057 1G 0.051 | 6.1
51 | :°!3 10.097 | 12.3] 0.090 | 11.3} 0.084 | 10.3 | 0.077 0.070| 8.3] 0.064] 7.4
52 |” Jo.110| 18.5] 0.104] 12.5] 0.097 | 11.5] 0.091 |0.084| 9.6}0.077] 8.7
| 58 0014 10.125 | 14.8]0.118 | 13.7] 0.111 | 12.8 | 0.105 0.098 | 10.9] 0.092 | 9.9
| 4 0015 10.139 ; 16.0 0.133 14.9 | 0.126 | 14.0 | 0.120 0.113 | 12.1] 0.106 | 11.2
55 J P0'S 10.155 | 17-1] 0,148 | 16.140. 140 | 15.11 0.135 0.128 | 13.3 | 0.121 | 12.4
| 56 | 916 | 0.170 | 18.2] 0.164 | 17.2] 0.157 | 16.3 | 0.150 O.144 | 14.4] 0.137 | 13.5
| 57 |? So.1s6 | 19.4] 0.180 18.4] 0.173 | 17.4] 0.167 0.160 0.153 | 14.7
| 58 -0017 10.203 | 20.5] 0.197 | 19.5 10.190 | 18.5 | 0.183 0.177 ae 0.170 | 15.8
59 -0017 10.220 | 21.5 | 0.214 | 20.6] 0.267 | 19.6 | 0.200 0.194 | 17.7} 0.187 | 16.9
60 0018 7 0.238 | 22.5] 0.231 | 21.6 | 0.225 | 20.6] 0.218 0.211 | 18.7 | 0.205 | 17.8
61 0019 10.256 | 23.4 | 0.250 | 22.5 | 0.243 | 21.5 | 0.236 ‘0.230 | 19.7] 0.223 | 18.8
62 ee 0.275 | 24.4 | 0.269 | 23.5 | 0.262 | 22.4 | 0.255 0.249 ae 0.242 | 19.7
63 -0020 | 0.295 , 25.3 | 0.288 | 24.4 | 0.282 | 23.3 | 0.275 0.268 0.262 | 20.7
64 -0020 70.315 | 26.1] 0.309 | 25.3 | 0.302 | 2.4.2 | 0.295 0.289 a 0.282 | 21.6
| 65 0021 | 0.336 | 27.0] 0.330 | 26.1 | 0.323 | 25.1] 0.316 0.309 | 23.3} 0.308 | 22.4
66 70022 10.353 | 27.9] 0.351 | 27.0 | 0.344 | 26.0] 0.338 0.331 | 24.2 | 0.324 03.3 |
67 -0023 | 0.380 | 28.7] 0.373 | 27.8 | 0.367 | 26.8 | 0.360 0.353 | 25.0] 0.346 | 24.2 |
| : |
i -
| Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018.
(ee = “i eee eee ey
B 68

PSYCHROMETRICAL TABLES. 105

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

t—t’, or Difference of Wet and Dry Bulb Thermometers.

21°.0 21°.5 22°.0 22°.5 23°.0 23°.5

Mean

of Vapor -- ff
Fahren-} for each Rela- Rela- | Rela- Rela- Rela- Rela-
; Qos | tive tive tive tiv tive tive
Force of y{u- {Force of ffy- |Force of Jiy- {Force of, f{y- [Force of} Py. [Force of| Fy-
Vapor. mid- Vapor. | mid- Vapor. mid- Vapor. mid- Vapor. mid- Vapor. mid-
ity ity. ity. ity. ity. ity.
Eng. In. Eng. In.| - Eng. In, Eng. In. | - {Eng. In. Eng. In.
conga | 01083 | 29-5] 0.896 | 28.5] 0.389 27.6] 0.383 26.7 | 0.876 | 25.8 | 0.369 | 25.0
“02s | Ort26 | 30-2] 0.420 | 29.5 | 0.413 | 28.4] 0.406 27.5 | 0.399 | 26.6 | 0.393 | 25.8
“org | Ort32 | 31-0] O44 | 30-1] 0.437 | 29.1] 0.430 | 28.2] 0.424 | 27-4] 0.417 | 26.5
“ho2 | 07476 | 31-7 | 0-469 | 30.8 | 0.162 | 29.9) 0.455 | 29.0} 0.449 | 28.1 | 0.442 | 27.8
0.501 | 32.4] 0.495 | 31.5 | 0.488 | 30.6 | 0.481 | 29.7 | 0.475 | 28.8 | 0.468, | 28.0
0027
‘poe | 0-528 | 83-1] 0.521 | 82.2] 0.515 | 31.3] 0.508 | 30-4] 0.501 | 29.5 | 0.494 | 28.7
“ove | 07296 | 33-8 | 0-549 | 32.8 | 0.542 | 31.9} 0.535 | 31-1 | 0.529 | 30.2 | 0.522 | 29.4
“joao | OroS# | S44] 0.577 | 33.5 | 0.570 | 32.6] 0.564 31.7 | 0.557 | 30.9 | 0.550 | 30.0
“oan | 0-28 | 35.0] 0.606 | 34.1] 0.599 | 33.2] 0.593 32.3] 0.586 | 31.5 | 0.579 | 30.7
0.643 | 35.6 | 0.636 | 34.7 | 0.629 | 33.8 | 0.623 | 33.0] 0.616 | 32.1 | 0.609 | 31.3
0031 |
gogo | 0°87! | 36.2 | 0.667 | 35.3 | 0.660 | 34.4} 0.658 |-33.6 | 0.647 | 82.7 | 0.640 | 31.9
“jong 0°70 | 36:8 | 0.699 | 35.9 | 0.692 | 35.0] 0.685 | 34.2 | 0.678 | 33.3 | 0.671 | 32.5
“ona | 0-788 | 87-4] 0-731 | 86.5] 0.724 | 35.6] 0.718 | 34.7 [0.71] | 83.9 | 0.704 | 33.1
“song | Or272 | 37-9 0.765 | 37.0 | 0.758 36.1 | 0.751 35.3 | 0.745 | 34.5 | 0.738 | 33.5
| 0.806 | 38.4] 0.800 | 37.6 | 0.798 | 36.7 | 0.786 | 35.8 | 0.779 | 35.0 | 0.772 | 34.2
0036 | t
cooaz | Or342 | 89-0] 0-835 | 88.1 | 0.829 | 87.2 | 0.822 | 34.4] 0.815 | 35.5] 0.808 | 34.7
“ogg | O:379 | 39-5 | 0.872 | 88.6 | 0.865 | 37.7 | 0.858 | 36.9] 0.852 | 36.1] 0.845 | 35.2
“ona | C227 | 40-0 | 0-910 | 39.1 | 0.903 | 38.2 |-0.896 | 87.4] 0.889 | 36.6 | 0.882 | 35.8
0.955 | 40.4 | 0.948 | 39.6 | 0.942 | 38.71 0.935 | 37.9 | 0.928 | 37.1] 0.921 | 36.3
0049 1 0.995 | 40.9 | 0.938 | 40.1 | 0.981 | 39.2 | 0.975 | 38.4 | 0.968 | 37.5 | 0.961 | 36.7
0041 |
11.036 | 41.4] 1.029 | 40.5 | 1.022 | 39.7] 1.016 | 38.8] 1.009 | 38.0] 1.002 | 37.2
0042 1 1.078 | 41.8 | 1.071 | 41.0 | 1.065 | 40.1] 1.058 | 39.3 | 1.051 | 38.5 | 1.044 | 37.7
0044 11122 42.3 1.115 | 41.4] 1.108 | 40.6} 1.101 | 39.7] 1.094 | 38.9 | 1.088 | 38.1
“0099 11.166 | 42.7| 1.160 | 41.9 | 1.153 | 41.0] 1.146 | 40.2] 1.139 | 39.4] 1.132 | 38.6
0046 ¥ 1.212 | 43.1| 1.206 | 42.3] 1.199 | 41.4] 1.192 | 40.6] 1.185 | 39.8 | 1.178 | 39.0
0048S
11.260 | 43.5] 1.253 | 42.7] 1.246 | 41.9] 1.239 | 41.0 | 1.232 | 40.2 | 1.225 | 39.4
0049 71.308 | 43.9] 1.301 | 43.1] 1.294 | 42.3 | 1.287 | 41.4] 1-280 | 40.6] 1.274 | 39.9
0090 17.358 | 44.3 [1.351 | 43.5 | 1.3.44 | 42.7] 1.337 | 41.8 | 1.330 | 41.0] 1.328 | 40.3
0051 11.408 | 44.7] 1.402 | 43.9] 1.395 | 43.0] 1.888 | 42.2 | 1.381 | 41-4] 1.374 | 40.7
0093 14.461 | 45.1] 1.454 | 44.31 1-447 | 43.4] 1.440 | 42.6] 1-488 | 41.8 | 1.426 | 41.1
0054 11.515 | 45.5 | 1.508 | 44.6] 1.501 | 43.8] 1.494 | 43.0] 1.487 | 42.2] 1.480 | 41.4
0056
11.570 | 45.8] 1.563 | 45.0}| 1.556 | 44.2] 1.550 | 43.4] 1.543 | 42-6 | 1.536 | 41.8
0057 1 1.627 | 46.2] 1.620 | 45.4| 1.613 | 44.5 | 1.607 | 43.7] 1.600 | 43.0] 1.593 | 42.2
0059 11.686 | 46.5] 1.679 | 45.7 | 1.672 | 44.9] 1.665 | 44.1 | 1.658 | 43.3] 1.651 | 42.5
0060 1 4.746 | 46.8 | 1.739 | 46.0 | 1.732 | 45.2 | 1.725 | 44.4 | 1-718 | 43.7] 1.711 | 42.9
0062 11.807 | 47.2 | 1.300 | 46.4| 1.793 | 45.6 | 1.786 | 44.5 | 1.779 | 44.0] 1.772 | 43.2
0089 11.870 | 47.5 | 1-863 | 46.7] 1.856 | 45.9 | 1.849 | 45.1] 1.842 | 44.3 | 1.835 | 43.6 ||

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0018.

69

PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

| |
| t— Ut, or Difference of Wet and Dry Bulb Thermometers. i
Wet- Mean —————————
Bulb | Vertical
Thermo-Diflerence] @go,g 24°.5 | 25°.0 26°.5
meter | of Force
t of Vapor
|Zahnen= | for each Rela- Rela- Rela- | Rela- Rela- Rela
heit. tive tive | tive tive tive tive
Hu- Force of, q{y- fForce of| Hu- Hu- [Force of) yyy. [Force of) yyy-
mid- | Vapor. | mia- | Vapor. | mid- mid- | Vapor. | mig. | Vapor. | mia-
ity. ity. ity. ity. ity. ity.
° Eng. In Eng. In Eng. In Eng. In.
32
33
34
35
36
37 |
38
39 |
40 |
41
42 |
43 |
44
45 |
46 '
47
48 2.410.012} 1.5
49 3.9] 0.025} 3.0]0.018| 2.2]0.011] 1.3
50 5.2] 0.037} 4.470.031) 3.6]0.024|] 2.7]0.018 | 2.0]0.011] 1.2
51 6.5]0.051| 5.710.044] 4.9]0.087] 4.110.031] 3.370.024} 2.5
52 7.8)0.064| 7.0)0.058} 6.140.051] 5.3]0.044] 4.6]0.038 |] 3.8
53 9.1] 0.078 | 8.240.072) 7.4]0.065| 6.6]0.058 | 5.810.052] 5.1
54 10.3} 0.093 | 9.4]0.086| 8.6}0.080] 7.8]0.073 | 7.040.067; 6.3
55 11.5] 0.108 | 10.6] 0.102} 9.810.095 | 9.010.088] 8.270.082] 7.5
56 12.7] 0.124 | 11.8] 0.117 | 11.0] 0.111 | 10.2]0.104| 9.470.097] 8.7 |
57 13.8 | 0.140 | 13.0} 0.133 | 12.1] 0.127 | 11.3] 0.120 | 10.6] 0.113 | 9.8
58 14.9 | 0.157 | 14.1] 0.150 | 13.2 | 0.143 | 12.5 | 0.137 | 11.7] 0.130 | 10.9
59 16.0 | 0.174 | 15.2 | 0.167 | 14.3] 0.161 | 13.6] 0.154 | 12.8 | 0.147 | 12.0 II
60 17.0 | 0.191 | 16.1] 0.185 | 15.3 | 0.178 | 14.6 | 0.172 | 13.8 | 0.165 | 13.0 |
61 17.9 | 0.210 | 17.1 | 0.203 | 16.3 | 0.196 | 15.5] 0.190 | 14.7] 0.183 | 14.0
62 18.9 | 0.229 | 18.1 | 0.222 | 17.2 | 0.215 | 16.5 | 0.209 | 15.7 | 0.202 | 15.0
63 19.8 | 0.248 | 19.0] 0.242 | 18.2 | 0.235 | 17.4] 0.228 | 16.6 | 0.222 | 15.9
| 64 20.7 | 0.269 | 19.9 | 0.262 | 19.1] 0.255 | 18.3 | 0.248 | 17.5 | 0.242 | 16.8
65 21.6 | 0.289 | 20.8 | 0.283 | 20.0] 0.276 | 19.2 | 0.269 | 18.4] 0.268 | 17.7
66 22.5} 0.311 | 21.7 | 0.304 | 20.9 | 0.297 | 20.1] 0.291 | 19.3 | 0.284 | 18.6 |
67 23.3 | 0.333 | 22.5 | 0.326 | 21.7 | 0.320 | 20.9 | 0.313 | 20.2 | 0.306 | 19.4
|
| Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0013.
=I

B 70

107

PSYCHROMETRICAL TABLES.

Temperature. Fahreuheit. — Force of Vapor in English Inches. — Relative Humidity in Hundredths.

ji

t — t’, or Difference of Wet and Dry Bulb Thermometers.

. Wet- Mean ar

Bulb } Vertical

|Thermo- Difference 24°.5 25°.0 25°.5

meter jof Force
t! of Vapor ———

Fahren-} for each Rela- Rela- Rela-

!| heit. tive tive | tive tive tive

Hu- Hu- Force 0 Hu- Force of Hu- Force of} Hu-

mid- mid- | Vapor. | mid- }| Vapor. | mid- | Vapor. | mid-

| ity. ity. ity. ity. ity.
° 3 Eng. In Eng. In Eng In.

| 68 23.3 | 0.349 | 22.5 0.342 | 21.8 | 0.336 | 21.8 | 0.329 | 20.3 |
69 24.1 | 0.373 | 23.3 | 0.366 | 22.6 | 0.359 | 21.8 | 0.352 | 21.1 |

ZO 24.9 | 0.397 | 24.1 | 0.390 | 23.3 | 0.383 | 22.6 | 0.377 | 21.9

e711 25.6 | 24.9} 0.415 | 24.1 | 0.408 | 23.3 | 0.402 | 22.6

| 92 26.4 25.6 | 0.441 | 24.8 | 0.434 | 24.1 | 0.427 | 23.3

| 973 27.1] 0.474 | 26.3 | 0.467 | 25.5] 0.461 | 24.8 | 0.454 | 24.0
74 27.7 | 0.502 | 27.0} 0.495 | 26.2] 0.488 | 25.5} 0.481 | 24.7

7S 28.4] 0.530 | 27.6 | 0.523 | 26.8] 0.516 | 26.1 | 0.510 | 25.4

| 76 29.1] 0.559 | 28.3 | 0.552 | 27.4] 0.515 | 26.8 | 0.539 | 26.1

Gi 29.7 | 28.9 | 0.582 | 28.0] 0.575 | 27.4 | 0.568 | 26.7

| 7g 30.3 | 0.619 | 29.5 | 0.613 | 28.7] 0.606 | 28-0 | 0.599 | 27.3

| a 30.9 | 0.651 | 30.1 | 0.644 | 29.3 | 0.638 | 28.6 | 0.631 | 27.9 |!

| ge 31.5 | 30.7 | 0.677 | 29.9] 0.670 | 29.2 | 0.663 | 28.5
81 32.1 31.3} 0.711 | 30.5 | 0.704 | 29.8 | 0.697 | 29.1

} 82 32.6 31.8 | 0.745 | 31.0] 0.738 | 30.4 } 0.732 | 29.7
83 33.2 32.410.781 | 31.6 | 0.774 | 30.9 | 0.767 | 30.2
84 33.7 32.9 | 0.818 | 32.1] 0.811 | 31.5 | 0.804 | 30.7
85 34.2 | 0.862 | 33.4] 0.855 | 32.71 0.848 | 32.0] 0.842 | 31.3
86 34.7] 33.9 | 0.894 | 33.2 | 0.887 | 32.5 | 0.880 | 31.8
87 35.2 34.4 | 0.934 | 33.7] 0.927 | 33.0 } 0.920 | 32.3
88 35.7] 0.981 | 34.9] 0.975 | 34.2] 0.968 | 33.5 | 0.961 | 32.8 |
89 36.1] 1.024 35.4]1.017 | 34.7] 1.010 | 33.9 | 1.003 | 33.2
90 36.6 | 1.067 | 35.81 1.060 | 35.1 | 1.053 | 34.4] 1.046 | 33.7
91 37.1] 1.112 | 36.3]1.105 | 35.64 1.098 | 34.9] 1.091 | 34.2
92 37.5 | 1.157 | 36.7] 1.151 | 36.0] 1.144 | 35.3] 1.137 | 34.6
93 37.9 ] 1.205 | 37.1] 1.198 | 36.5] 1.191 | 35.7] 1.184 | 35.0
94 38.3 ] 1.253 | 37.5] 1.246 | 36.9 | 1.239 | 36.2 | 1.232 | 35.5

| 95 38.7 | 1.302 | 37.9 | 1.296 | 37.3 | 1.289 | 36.6 | 1.282 | 35.9
96 39.1 | 1.353 | 38.3 | 1.346 | 37.7] 1.340 | 37.0} 1.333 | 36.3
97 39.5] 1.406 | 38.7] 1.399 | 38.1 | 1.392 | 37.4] 1.385 | 36.7
98 39.9 | 1.460 | 39.1] 1.453 | 38.5 [1.446 | 37.8 | 1.439 | 37.1 |
99 40.8} 1.515 | 39.5] 1.508 | 38.9] 1.501 | 38.2} 1.494 | 37.5 |
190 40.7] 1.572 | 39.9] 1.565 | 39.2} 1.558 | 38.5 | 1.551 | 37.9 |]
101 41.0] 1.630 | 40.3] 1.623 | 39.6 | 1.616 | 38.9] 1.609 | 38.2 j
102 41.4] 1.690 | 40.7 | 1.683 | 40.0 | 1.676 | 39.3 | 1.669 | 38.6 ||
103 41.8]1.75 | 41.0] 1.745 | 40.3 | 1.738 | 39.6] 1.731 | 38.9
104 42.1]1.814 | 41.4]1.807 | 40.7] 1.800 | 40.0] 1.793 | 39.3

iL—
B

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0013.

71

|

——

108

PSYCHROMETRICAL TABLES.

Temperature, Fahrenheit.—Force of Vapor in English Inches.—Relative Humidity in Hundredths.

|Fahren-{

heit.

f 0.0013

# 0.0016
H 0.0016

f 0.0017

i 0.0019

i 0.0020

0.0021
} 0.0022

| 0.0013 f
} 0.0014 |
B O.0015
0.0015

H 0.0017 §
0.0018 j
f 0.0018 }

0.0019 }

| 0.0021 |

t—t’, or Difference of Wet and Dry Bulb Thermometers,

29°.0

24°.0 BBO. 28°.0 280.5 29°.5
“i Rela- Rela- | Rela- Rela-
X ‘ lait lees :
wont woree yore Hae noes He monte Hu. Boe tae
Vapor Vapor Vapor a Vapor re Vapor. ioe Vapor. in
Eng. In.) Eng. In Eng. In Eng. In Eng. In.|: Eng. In.
1 0.004 |
A O.018 0.010
0.031 0.024 | 2.4] 0.018 | 1.740.011 | 1.1] 0.005 | 0.4
0.045 0.038 0.032} 3.070.025) 2.470.019; 1.770.012} 1.1
0.060 0.053 0.047 | 4.310.040 | 3.6% 0.033 | 3.04 0.027 | 2:3
fO.075 0.068 0.062} 5.590.055) 4.870.048 | 4.290.042 | 3.5
0.091 0.084 7.3) 0.077 | 6.640.071 | 6.010.064 | 5.390.057 | 4.7
0.107 | 9,24 0.100 8.4] 0.093 | 7.8} 0.087] 7.1] 0.080] 6.510.074] 5.8
F 0.123 | 10.35 0.117 9.5 | 0.110} 8.9 0.103 | 8.210.097 | 7.6] 0.090] 6.9
0.141 | 11.38 0.134 | 0.127} 9.970.121 | 9.360.114] 8.6] 0.107 |- 8.0
0.158 | 12.3 f 0.152 | 11.6 10.145 | 10.9} 0.138 | 10.34 0.132 | 9.6] 0.125 | 9.0
0.176 | 13.3} 0.170 1 0.163 | 11.9} 0.156 | 11.3} 0.150 | 10.6] 0.143 | 10.0
10.195 | 14.3] 0.189 | 13.6} 0.182 | 12.9f 0.175 | 12.3] 0.169 |.11.6} 0.162 | 10.9
0.215 | 15.2} 0.208 | 14.6 0.202 | 13.94 0.195 | 13.2} 0.188 | 12.5} 0.181 | 11.9 |p
0.235 | 16.1 | 0.228 | 15e5 0.222 | 14.84 0.215 | 14.1] 0.208 | 13.5 4 0.202 | 12.8
0.256 | 17.0 § 0.249 | 16.3] 0.243 | 15.7 0.236 15.0} 0.229 | 14.3 | 0.222 | 13.7
0.277 | 17.9] 0.271 | 17.29 0.264 | 16.5 | 0.257 | 15.97 0.251 | 15.2] 0.244 | 14.6
\ | a |
0.300 | 18.7} 0.293 | 18.0] 0.286 | 17.4} 0.279 | 16.7} 0.273 | 16.1] 0.266 | 15.4
|

PSYCHROMETRICAL TABLES.

109

Temperature, Fahrenheit.—Force of Vapor in English Inches.—Relative Humidity in Hundredths.

76

0.0024
0.0025
0.0026

0.0027
0.0028
0.0028
0.0029
0.0030

0.0031
0.0032
0.0033
0.0034

| 0.0035

0.0036
0.0037
0.0038
0.0039
0.0040

0.0041
0.0042
0,0043
0.0044
0.0046

0.0047
0.0048
0,0050
0.0051
0.0052
0.0054

0.0055
0.0057
0.0059
0.0060
0.0062
0.0063

0.505
0.532
0.562

0.592
0.624
0.657
0.690
0.725

0.761
0.797
0.835
0.873
0.913

0.954
0.996
1.040
1.084
1.130

ILM Pe
1.225
1.275
1.326
1.378
1.432

1.487
1.544
1.603
1.662
1.724
1.787

1.218
1.268
1.3519
1.371
1.425

1.480
1537
1.596
1.655

L771 37.

1.779

0.309
0.332
0.356
0.381
0.407

0.434
0.461
0.489
0.518
0.548

0.579
0.610
0.643
0.677
0.711

0.747
0.783
0.821
0.860
0.899

0.940
0.983
1.026
1.070
1.116

1.163
1,212
1.261
1.312
1.364
1.418

1.473
1.530
1.589
1.648
1.710
1.773

weowewWw wb bv
Poe oS
aSaOoOW Ss ©

bo bo
> OV Cr

on Db

bo
oS

be by
<1 -T
oS

bo bo

co co ©
~I bo

iw)

bo

ow wh
Sa mera
<1 boss

oo
e
we)

0.400

0.427
0.454
0.482
0.511
0.541

0.572
0.604
0.636
0.670
0.705

0.740
0.777
0.814
0.853

2} 0.893

0.933
0.976
1.019
1.064
1.109

1.156
1.205
1.254
1.305
1.357
1.411

1.467
1.523
1.582
1.642
1.703
1.766

bo

bo bw be
ww bp b

bo

bo bo bo
DD» Bp
Omwmbds ad

bo

bowwb b bw
Oo O& wm Om =I
Oreo ed or

0.698
0.733
0.770
0.808

0.846 | :

0.886

0.927
0.969
1.012
1.057
1.103

1.150
1.198
1.247

1.298 | 33

1.351
1.404

1.460
1.516
1.575
1.635
1.696
1.759

36.1] 1.752

Mean Horizontal Difference of Force of Vapor for each 0°.1 = 0.0013.

73

—

| tical
| Height.

For
| Baromet-
J

| Eng. In.
31.0
30.5
| 30.0
29.5
29.0
28.5

aD

or

28.5

28.0
27.5
i 27.0
26.5
26.9
25.5

25.0
24.0
23.0
22.0
21.0
20.0

31.0
30.5
30.0
29.5
29.0

PSYCHROMETRICAL TABLES.

Correction for Barometrical Height above or below the Normal Height of 29.7 inches.

—————————

Difference of Thermometers, or ¢—t' Fahrenheit.

+.015 |+.023 |+.030 |+.038

accuracy of the results.

2° | 4° | 6° | 8° | O°} 12° | 14° | 16° | LB? | 2O° | 22 | VA? | VEO
|
Wet Bulb above the Freezing-Point.
| |
Inch.| Inch.| Inch.| Inch.| Inch.| Inch.| Inch.} Inch. | Inch.| Inch.| Inch. |: Inch. | Inch.
—.001 |—.002 |—.003 |—.005 |—.006 |—.007 |—.008 |—.009 |—.010 |—.012 |—.013 |—.014 |—.915
|| .OO1| .001} .002; .003| .004|) .004} .005| .006] .006) .007| .008| .009| .009
—.000 |—.000 |-.001 |—.001 |—.001 |—.002 |—.002 |—.002 |—.002 |—.003 |—-.008 |~.003 —.004 |
|| +.000 |+.000 |+.001 |+.001 |+.001 |+.001 |+.001 |+.001 |+.002 |+.002 |+.002 |+.002 |+.002
-001) .001} .002} .003} .003] .004| .004} .005} .006} .006| .007}| .008| .008
-001} .002} .003} .004] .005]) .006; .007|) .009}] .010; .011] .012] .013] .014
001) .003| .005| .006) .008| .009| .011] .012| .014] .015| .017] .018) .020
.002| -004} .006} .007} .010] .012] .014] .016/ .018] .020| .022] .024] .026 !/
-002| .005| .007} .009} 012] .014} .017] .019] .022] .024]) .027] .029}| .031 |;
003} .006} .008|; .011| .014] .017) .020] .023/] .026| .029] .031] .034] .037
-003| .006} .010} .013; .016] .020] .023] .026] .030}] .033| .036] .040] .043
.004| .007| .011] .014] .019| .022] .025] .030| .034] .037| .041] .045] .049
004} .008| .012] .016] .021|; .025] .028) .038] .038| .042|] .046] .050] .055
-005| .010| .015} .020} .025] .030] .034] .010] .046|) .051/} .056|] .061] .066 |!
.006| .012] .018] .023! .030| .085} .041| .047] .054] .060| .066| .072) .078
-007| .013] .020} .027| .034} .041] .047] .054] 2062} .069| .076| .083| .090}!
.008| .015| .023| .030} .038} .046| .053] .062] .070| .077| .085! .093] .101 ||
+.008 |+.017 |}+.026 |+.034 |+.043 |+.051 |+.059 |+.069 |+.078 |+.086 |+.095 4.104 +.113 |
Wet Bulb below the /
Ee ees EXAMPLE OF CALCULATION.
—.001 |—.002 |—.003 |=.004 |—.006 Wet Bulb above the Freezing-Point.
.001} .001); .002} .003) .603 Ui =='629 FS C0 — 1025 | Barom?:—=126:5)in:
—.000 |—.000 |—.001 |—.001 |—.001 The large tables give fora mean baro-
+.000 |+.000 |+.000 |+.001 |+.001| metrical height of 29.7 inches. Force of Inch, |}
-001| .001]) .002} .002} .003) Vapor ; 2 : : : = 0.422
001] .002) .003} .004} .005 Additive correction, in this table, for
B = 26.5 inches, and 10° 6 ; = 0.014
va ae oe ae a Corrected Force of Vapor . =0.436
Ae Bos Oe ee ora aces The mean barometrical pressure, at a given place ||
02 005) .007) -010})| -013 of observation, being known, the above Psychro-
we 006} .009) .012) .014) snetrical Tables may be fitted for that place, by
003; .007) .010} .013) .016 determining, by means of this table, a constant cor-
rection, to be applied to the numbers in the tables,
-003| .007| .011) .015| .018| expressing the force of vapor. This correction will |
004} .009} .013) .018| .022) be found by taking for t—t/, or the difference of
005} .019) .016/ .021! .026) thermometers, a mean value, representing the mean |
006} .012| .018}) .024] .030) moisture of the air. The errors arising from the
006) .014| .020| .027| .034/ deviations from that mean will little impair the |

74

111

TABI VALLI:

FOR DEDUCING THE RELATIVE HUMIDITY OF THE AIR FROM THE INDICATIONS, IN
ENGLISH MEASURES, OF THE DEW-POINT INSTRUMENTS.

THE object of every Dew-Point instrument is to ascertain, by causing a part of the
apparatus to cool, the temperature at which the vapor contained in the air begins to
condense, in the shape of light dew, on the cooled portion of the instrument. It is
obvious that this is the temperature at which the atmosphere itself, if cooled likewise,
would be fully saturated by the amount of vapor present in the air at the time of the
observation.

The temperature of the dew-point being known, all the hygrometrical conditions
of the air can be easily deduced from it.

The Absolute Humidity, or the total amount of vapor in the atmosphere, is ex-
pressed by the number, in the Tables of Elastic Forces of Vapor, due to that temper-
ature.

The Relative Humidity, or the degree of moisture, being the ratio of the quantity
of vapor actually contained in the air to the quantity it could contain if fully saturated,
is expressed by the proportion

Relative Humidity : 1 :: Force of Vapor at Dew-Point : Maximum Force of Vapor.

Calling the
Force of Vapor at the Temperature of the Dew-Point, f;

Force of Vapor at the Temperature of the Air, F ;
then

Relative Humidity = /.

It is thus found by dividing the force of vapor due, in the Table of Elastic Forces,
to the temperature of the dew-point, by the maximum of the force of vapor due, in
the same table, to.the temperature of the air at the time of the observation. F being
always greater than f, when the air is not saturated, the Relative Humidity is ex-
pressed by a fraction, which is termed the fraction of saturation. Making the point
of saturation = 100, in order to obtain this fraction in hundredths, we have

Relative Humidity ee

B 75

112 FOR DEDUCING THE:RELATIVE HUMIDITY OF THE AIR.

Example.
Suppose the
Temperature of the Air, or t, to be == Aerie
Temperature of the Dew-Point, or t/, to be yoo wen
Difference between the two, or t—t’, to be ==) (Siok

Taking in Table VI. the Elastic Forces due to t and t/, we have

Force of Vaporatt! 2087 X 100 ___ : ° 4s * :
Force of Vapor abt = 9775 = 78-4, Relative Humidity in Hundredths.

The following Table VIII. gives, in hundredths, the fraction ,of saturation, or Rel-
ative Humidity, corresponding to each degree of {/, or of the temperature of the air,
from 0° to 104°; and for every half degree of t —1’, or of the difference between
the temperature of the air and of the dew-point, from 0.°5 to 24.°5. Regnault’s Table
of Elastic Forces of Vapor, reduced to English measures, has been used in the
computation.

Though the fraction of saturation expressed in hundredths indicates the Relative
Humidity with sufficient accuracy, the thousandths have been added to facilitate, as
remarked above in the preface to the Psychrometrical Tables, the interpolations for
any number falling between those given in the table.

Use oF THE TABLE.

Example.
Temperature of Air, or t, being == (62°F:
Temperature of the Dew-Point, or 1’, = 5dr ne
Difference, or t—t’, = Oe

Find out the Relative Humidity.

In the column of temperatures, the first on the left, find 62°; on the same horizon-
tal line, in the column headed 9°, is found 72.4, which is the Relative Humidity
required,

Should it seem desirable to compute the Relative Humidity for values of t—t!’
not contained in the table, the factors given below in Table IX. may be used. It
may be seen, however, that an interpolation at sight will always suffice for meteo-
rological purposes.

a
=
oo

VERE:

FOR DEDUCING THE RELATIVE HUMIDITY OF THE AIR,

FROM THE INDICATIONS OF DEW-POINT INSTRUMENTS.

Relative Humidity expressed in Hundredths, full Saturation being = 100.

Temper- t —t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.
of Air, 3 =
Fahren- |
heit. 0.0 § 0.5 1.0 1.5 2.0 | 2.5 3.0 3.5 4.0 4.5
0° 100. 97.7 95.4 93.2 91.0 88.9 86.8 84.8 82.8 | 80.9
1 100. 97.7 95.5 93.3 91.1 89.0 86.9 84.9 82.9 81.0
2 100. 97.7 95.5 93.3 91.2 89.1 §7.0 85.0 &3.0 81.1
3 100. 97.8 95.5 93.4 91.2 89.2 87.1 85.1 &3.1 81.2
4 100. 97.8 95.6 93.4 91.3 89.2 87.2 85.2 €3.2 81.3
5 100. 97.8 95.6 93.5 91.4 89.3 87.3 85.3 §3.3 81.4
6 100. 97.8 95.6 93.5 91.4 89.3 87.3 &5.3 £3.35 81.5
7 100. 97.8 95.6 93.5 91.4 89.3 87.3 85.3 &3.4 81.5
8 100. 97.8 95.6 93.5 91.3 89.3 87.3 85.3 83.4 81.5
9 100. 97.8 95.6 93.5 91.3 89.3 87.3 85.3 83.4 81.5

10 100. 97.8 95.6 93.4 91.3 89.3 87.3 85.3 §3.4 81.5
1l 100. 97.8 95.6 93.4 91.3 89.3 87.3 85.3 83.4 81.6
12 100. 97.8 95.5 93.4 91.3 89.3 87.3 85.4 83.4 81.6
13 100. 97.8 95.5 93.4 91.3 89.3 $7.3 85.4 83.5 81.6
14 100. 97.7 95.5 93.4 91.3 89.3 87.3 85.4 83.5 81.7

15 100%) 099-7) | Osh. |) O84 | Once |, Sol4) | ‘S74 |) S55 || 83.5° | 81.7
16 LOO | O7-7) lena) “98.40 14 94.9) 89.3 Sy-sall 5.6 | S3.5c:| “S16
17 MOOS | OTH WeGo Ose | Sys |) 80.3. | S794) S58 | 83.4 | SIG
18 WOVE C99 | Gots. 4 1984s Oaks: ||) 85.8» | 1873) 4) 5.3' |) 88.4 || SIkS
19 TO0s || 97-8) | 95.5) ) 98-4) > O93 | 8Old | S7-2 || 85.2" | 83.3. |) Sid

0.0 | 0.5 | 1.0 | 1.5 | 20 | 25 | 30 | 35 | 40 | 4.5

‘Uz: RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

i ——————————
|
| remnees t— t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.
ature
| of Air, =
| Fahren-
| heit. 5.0 5.0 6.0 6.5 7.0 0) 8.0 8.5 9.0 9.5
| 0° 79.0 17.2 75.4 73.6 71.9 70.1 68.5 66.9 65.3 63.7
1 woe 77.3 75.5 73.7 72.0 70.2 68.6 67.0 65.4 63.3
2 79.2 77.4 75.6 73.8 72.1 70.3 68.7 67.1 65.5 64.0
3 79.3 1.9 hood 73.9 W222 70.5 68.8 67.2 65.6 64.1
4 79.4 77.6 75.8 74.0 ae 70.6 68.9 67.3 65.7 64.2
5 79.5 ibe 75.9 74.1 72.4 70.7 69.1 67.4 65.8 64.4
6 196 17.8 76.0 7A.2 72.5 70.8 69.2 67.6 66.0 64.5
ia 79.6 77.8 76.0 74.3 72.6 70.9 69.3 67.7 66.1 64.6
§ 79.6 Med 76.1 FAA 72.7 71.0 69.4 67.8 66.2 64.7
uy) oad 1a9. viiret 74.4 12.7 mel 69.5 67.9 66.3 64.8
10 79.7 77.9 76.2 TA5 72.8 71.2 69.6 68.0 66.4 64.9
11 79.7 78.0 76.2 74.5 72.8 71.2 69.6 68.0 66.5 64.9
12 79.8 78.0 76.2 74.5 72.9 71.2 69.6 68.0 66.5 65.0
13 79.8 78.0 76.3 74.6 72.9 71.3 69.6 68.1 66.5 65.0
i+ vhs} 78.1 76.3 7A.6 72.9 71.3 69.6 68.1 66.5 65.1
15 79.8 78.1 76.3 741.6 a 71.3 69.7 68.1 66.6 65.1
16 79.8 78.0 76.2 74.5 2.9 71.2 69.6 |, 68.1 66.5 65.1
17 oad 1429 76.1 74.5 72.8 71.2 69.6 68.0 66.5 65.0
18 79.6 77.8 76.1 TAA Tos 71.1 69.5 68.0 66.5 65.0
19 79.6 77.8 76.0 74.3 72.7 W1.1 69.5 68.0 | 66.4 65.0
10.0 10.5 | 11.0) 29.5 |) 12.0] 12.5 13.0) 13.5) 14.0) 14.5
0° O2el 60.7 59.2 57.7 56.3 54.9 53.6 52.3 51.0 49.8
1 62.3 60.8 59.3 57.9 56.5 55.1 53-7 52.5 51.2 50.0
2 62 61.0 59.5 58.1 56.6 55.3 53.9 D201 51.4 50.1
3 62.6 Ol 59.6 58.2 56.8 55.5 54.1 2.8 51.5 50.3
4 62.7 61.3 59.8 58.4 57.0 53.7 54.3 53.0 51.7 50.5
|
| 5 62.9 61.4 60.0 58.6 57.2 55.8 54.5 53.2 51.9 50.7
| 6 3.0 | 61.5 | 60.1 | 58.7 | 57.3) || 55.9 || 51.6 | 53.3 || 52.0 |) 50-8
tal 63.1 61.7 60.2 58.8 57.4 56.0 54.7 53.4 52.1 50.9
8 63.2 61.8 60.3 58.9 5i.0 56.2 54.8 53.5 52.3 51.0
9 63.3 61.9 60.4 59.0 57.6 56.3 54.9 53.6 52.4 51.2
10 63.4 62.1 60.5 59.1 57.7 56.4 55.0 53.8 52.5 51.3
M1 63.5 62.1 60.6 59.2 57.8 56.5 55.1 53.9 52.6 51.4
| 12 6325 62.1 60.6 59.3 57.9 56.6 55.2 54.0 Darl 51.5
| 13 63.5 62 2 60.7 59.3 58.0 56.6 55.3 54.1 52.8 51.6
| 14 63.6 62.3 60.8 59.4 58.1 56.7 55.4 54.2 52.9 51.7
| 1S 63.6 62.3 60.8 59.5 58.1 56.8 55.5 54.3 53.0 51.8
16 63.6 62.3 60.8 59.5 58.1 56.8 55.5 54.3 53.0 51.8
| Le, 63.6 62.2 60.8 59.4 58.1 56.7 55.5 54.2 53.0 51.8
18 63.5 62.2 60.7 59.4 58.0 56.7 55.4 54.2 53.0 51.8
19 63°5 | 62.1 60.7 59.3 58.0 56.6 55.4 54.2 52.9 51.8

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT. 115

oat

t—t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.

15.0 15.5) 16.0) 16.5 17.0] 17.5 | 18.0 18.5 19.0 | 19.5

48.5 A7.3. 46.1 45.0 43.9 42.8 41.6 40.6 39.5 38.5
48.7 47.5 46.3 45.2 44.0 42.9 41.8 40.8 39.7 38.7
48.9 47.7 46.5 45.4 44.2 43.1 42.0 41.0 39.9 38.9
49.1 47.9 46.7 45.5 44.4 43.3 42.2 41.2 40.2 39-2
49.3 48.1 46.9 45.7 44.6 43.5 42.4 41.4 40.4 39.4

49.4 48.2 47.1 45.9 44.8 43.7 42.6 41.6 40.6 39.6
49.6 48.4 47.2 46.1 44.9 43.9 42.8 41.8 40.7 39.8
49.7 48.5 47.3 46.2 45.1 44.0 42.9 41.9 40.9 39:9
49.8 48.7 47.5 46.4 45.3 44.2 43.1 42.1 41.1 40.1
50.0 48.8 47.6 46.5 45.4 44.3 43.3 42.2 A1.2 40.2

coaonrna

10 50.1 48.9 47.8 46.7 45.6 44.5 43.4 42.4 41.4 40.4
11 50.2 49.0 47.9 46.8 45.7 44.6 43.5 42.5 41.5 40.5
12 50.3 49.1 48.0 46.9 45.8 44.7 43.6 42.6 41.6 40.6
13 50.4 49.2 48.1 47.0 45.9 44.8 43.7 42.7 41.7 40.7
14 50.5 49.3 48.2 47.1 46.0 A4.9 43.8 42.8 41.8 40.8

15 50.6 A9.4 48.3 47.2 46.1 45.0 43.9 42.9 41.9 40.9
16 50.6 49.5 48.3 47.2 46.1 45.0 44.0 43.0 41.9 41.0
17 50.6 49.5 48.3 47 2 46.1 45.0 44.0 43.0 42.0 41.0
18 50.6 49.5 45.3 47.2 46.2 45.0 44.1 43.1 42.0 41.1
19 50.6 49.5 48.3 47.3 46.2 45.1 44.1 43.1 42.1 41.1

20.0 | 20.5 | 21.0 | 21.5 22.0| 22.5 | 23.0 23.5 | 24.0 | 24.5

0° 37.5 36.5 35.5 34.6 33.7 32.8 31.9 31.0 30.2 29.3
1 37.7 36.8 35.8 34.8 33.9 33.0 32.1 31.3 30.4 29.6
2 37.9 37.0 36.0 35.1 34.2 33.3 32.4 31.5 30.7 29.9
3 38.2 37.2 36.2 35.3 34.4 33.5 32.6 31.8 30.9 30.1
4 38.4 37.4 36.5 35.6 34.6 33.8 32.9 32.0 31.2 30.4
5 38.6 37.7 36.7 35.8 34.9 34.0 33.1 32.3 31.4 30.6
6 38.8 37.8 36.9 36.0 35.0 34.2 33.3 32.5 31.6 30.8
7 38.9 38.0 37.0 36.1 35.2 34.3 33.5 32.6 31.8 31.0
8 39.1 38.1 37.2 36.3 35.4 34.5 33.6 32.8 32.1 31.2
a 39.2 38.3 37.3 36.4 35.5 34.7 33.8 33.0 32.3 31.4

10 39.4 38.4 37.5 36.6 35.7 34.8 34.0 33.1 32.5 31.6
Il 39.5 33.6 37.6 36.7 35.8 35.0 34.1 33-3 32.6 31.7
12 39.6 38.7 37.8 36.9 36.0 35.1 34.2 33.4 32.7 31.8
13 39.8 38.8 37.9 37.0 36.1 35.2 34.4 33.6 32.8 32.0
14 39.9 39.0 38.0 37-1 36.2 35.4 34.5 33.7 32.9 32.1

15 40.0 39.1 38.2 37.3 36.4 35.5 34.7 33.9 33.0 32.2
16 40.0 39.1 38.2 37.3 36.4 35.6 34.7 33.9 33.1 32.3
17 40.1 39.2 38.2 37.4 36.5 35.6 34.8 34.0 33.1 32.4
18 40.1 39.2 38.3 37.4 36.5 35.7 34.8 34.0 33.2 32.4
19 40.2 39.3 38.3 37.5 36.6 35.7 34.9 34.1 33.2 | 32.5

B 79

116

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

Temper-
ature
of Air,
Fahren-
heit.

39

40
41
42
43
44

46
47
48
49
50

51
52
53
54
55
56

t— t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.

100.

100.
100.
100.
100.

100.
100.
100.
100.
100.

100.
100.
100.
100.
100.

100.
100.
100.
100.
100.

100.
100.
100.
100.
100.

Ai00.
100.
100.
100.
100.
100.

100.
100.
100.
100.
100.
100.

97.8

97.8
97.8
97.8
97.8

97.8
97.8
97.9
97.9
97:9

97.9
98.0
98.0
98.0
98.0

98.0
98.1
98.1
98.1
98.1

98.1
98.1
98.1
98.1
98.1

98.1
98.1
98.
98.
98.

—

6
a
bo ow bk

ooeoveve 8S ©
nannmmm w
mow bh ww wv we

©
ey
<)

1.0

95.6
95.6
95.6
95.6
95.7

95.7
95.7
95.8
95.8
95.9

95.9
96.0
96.0
96.1
96.1

96.1
96.2
96.2
96.2
96.2

96.2
96.2
96.2
96.3
96.3

96.3
96.3
96.3
96.3
96.4
96.4

96.4
96.4
96.4
96.4
96.5

©
oe
or

Oo oO
an

ve}
a

© oO
a a S
QD or or or or or

96.

1.5

93.4

93.4
93.5
93.5
93.5

93.6
93.6
93.7
93.8
93.8

93.9
94.0
94.0
94.1
94.2

94.3
94.3
94.3
94.3
94.3

94.4
94.4
94.4
94.4
94.5

94.5
914.5
94.5
94.6
94.6
94.6

94.6
94.6
94.7
94.7
94.7
94.7

94.8
94.8
94.8
94.8
94.9
94.9

92.9
92.9
92:9
93.0
93.0
93.0

93.1
93.1
93.1
93.2
93.2
93.2

3.0

87.2
87.3
87.3
87.4
87.5

87.6
87.7
87.8
87.9
88.0

88.1
88.2
88.4
88.6
88.7

88.9
88.9
88.9
89.0
89.0

89.0
89.1
89.1
89.2
89.2

89.3
89.3
89.3
89.4
89.4
89.4

89.5
89.5
89.6
89.6
89.7
89.7

89.7
89.8
89.8
89.9
89.9
90.0

87.1
87.1
87.2
87.2
87.2

87.3
87.3
87.4
87.5
87.5

87.6
87.6
87.7
87.7
87.7
87.38

87.8
$7.9
87.9
88.0
88.0
88.1

88.1
88.2
88.2
$8.3
88.3
88.4

85.9
86.0
86.0
86.1
86.1
86.2

86.2
86.3
86.3
86.4
86.4
86.5

86.5
56.6
86.6
86.7
86.7
86.8

=}

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

TUG,

77
78
79
80
81

83
84
85
86

87
88
89
90
91

93
94
95
96
97
98

99
100
101
102
103
104

———_

0.0

100.
100.
100.
100.
100.

100.
100.
100.
100.

100.
100.
100.
100.
100.

100.
100.
100.
100.
100.

100.
100.
100.
100.
100.

100.
100.
100.
100.
100.
100.

100.
100.
100.
100.
100.
100.

100.
100.
100.
100.
100.
100.

0.0

t — t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.

0.5

93.3
98.3
93.3
93.3
98.3

93.3
98.3
98.3
98.3
98.3

98.3
98.3
98.3
98.3
98.3

98.4
98.4
98.4
98.4
98.4

98.4
98.4
98.4
98.4
98.4

98.4
98.4
98.4
98.4
98.4
98.5

ive)
wo
Or OV Or OV ON

cS
@
or

1.0

96.6
96.6
96.6
96.6
96.6

96.6
96.6
96.6
96.7
96.7

96.7
96.7
96.7
96.7
96.7

96.7
96.7
96.8
96.8
96.8

96.8
96.8
96.8
96.8
96.8

96.9
96.9
96.9
96.9
96.9
96.9

96.9
96.9
97.0
97.0
97.0
97.0

97.0
97.0
97.0
97.0
97.0
97.0

©

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2.5

91.6
91.6
91.6
91.7
91-7

SUG? f
91.8
91.8
91.8
OID

91.9
91.9
S19
92.0
92.0

92.0
9251
92.1
92.1

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3.0

90.0
90.0
90.0
90.1
90.1

90.1
90-2
90.2
90.3
90.3

90.3
90.4
90.4
90.4
90.5

90.5
90.5
90.6
90.6
90.6

90.7
90.7
90.8
90.8
90.8

90.9
90.9
90.9
91.0
91.0
91.0

Oe
Sirs
oa
91
91
91

bt tb =

91
91
91
91
OT:
91.

» hm & OY

3.0

3.5

88.4
88.4
88.5
85.5
88.5

88.6
88.6
88.7
88.7
88.8

88.8
88.8
88.9
88.9
89.0

89.0
89.1
89.1
89.1
89.2

89.2
89.3
89.3
89.3
89.4

89.4
89.4
89.5
89.5
89.6
59.6

89.6
89.7
89.7
89.7
89.8
89.8

89.9
89.9
89.9
90.0
90.0
90.0

Dod

86.8

86.8
86.9
86.9
87.0

87.0
87.1
87.
87.
87.

low bw

87.3
87.3
87.4
87.4

87.5

87.5
87.6
87.6
87.7
87.7

87.8
87.8
87.8
87.9
87.9

88.0
88.0
88.1 -
88.1

wa
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ou

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9 9) oa
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re

85.8
85.9
85.9
86.0
86.0

86.1
86.1
56.2
86.2
86.3

86.3
86.4
86.4
86.5
86.5

86.6
86.6
86.7
86.7
86.8
86.8

86.9
86.9
57.0
57.0

oom
1a 4
= Oo

Omm wom wm
eee ey eee eae
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=
I

Sn. eee eee

U

118 RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

t — t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.

Fahren-

heit. 3.0 | do. 6.0 6.5 70 | To 8.0 | 8.0 | 9.0 | 9.5

2
82.

42 82.5 | 80.9 7928 | 778 i $7633. 47428. || e73es ||, Bako 4) 270 T6920
43 82.5 | 80-9 | 79.4 | 77.9 | 76.4 | 74.9 | 73:4 | 720 | -70:%6 | 69.2
A4 82:6 || 820 || 79:5 | 6780 || 7605 || 7500 | 0785 | 72a || e087) | 69.38
45 8227 || s8el +) 77936 || 27800 || “7625 | wre || e73s6 || B282 || 70's 1! 69.4
46 82:8 || (8122 | 79:6 | 78a || e766 | o75ea | S78e7 9) 728 || 21019 +! 695
AT 82:8 ||| (81:2 | e797 || 27822 || “6z7 | 75s ¢| 473K8 "| e724 || vO 4] 69.6
48 82.9 °| 8128 | 179.8 >| 78:2 || 76:8 | w76sS | 4739 ¢| Wek 9] eas |) 66927
49 82.9 | 81:3 | 79:8 | 78:3 | 176.8 | 175.4 | 074.0 | 172.6 | 7122 || 69:8
50 830 || Silat || 479i9 »| e7Se4 |) e76cO 7 7st 1) e74s0: |) e7ae7 || 27 ee
51 8320 || n81e5 | 18020 || e78e5 + 47740 || azbem || Arde | 27208 || umes S| Ol0
52 8321 || 8125 | 180.0 || 2785 |) ev7e | szaue\ "| e7ase || sous || wraus T) Zea
53 83:2 || 181e6~ | 8011 | e786 } Gaga | wroey || Grass || 372.99) ase tae
54 83:2 | 817 || e802 || “78e7 |) ermee ||) 7558 +) eraca “| o73lo || Sauer 1| Gze's
5D 63:3 | 81.8 | 80.3 | 788 | 77.3 | 73.9 | 745 | waa | m8 )| 70.4
56 834 | 818 | “8028 | 2789 || br7e4 |] 7600 || e746 || a73i2 || ao F| 0%
57 8324 | 81.9 | 80:4 | 78.9 | e775 || e760 || oraey | e733 || 7250
58 83.5 | 82.0 | 80.5 | 79.0 | 77.6 | 76.2 7s ¢| ayaa) aes
59 83.6 | 82.0 | 80.6 | 79.1 77.7 | °76.2 | 0749 | 735 | 7252
60 83:6 | (62:1 | 80.6 || 17932 4 e7zer || e768 | 67500 || ee) 2B
61 8327" | (182.2 | 8027 || w7982) 4) H7g28 «| a76l4 || C7500 e7Benl ee
62 83:7 || (82:2 | 18038 |. °7938 | e749 || e76:5 | GTB) |) B7328) 1) yess

o 6.0 6.5 | 7.0 To | 8.0 8.5 9.0 9.5

a rn ee eS

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT. 119

Temper- t— t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.
ature
of Air,

Fahren-

heit. 5.0 3.0 6.0 6.5 7.0 7.0 8.0 8.3 9.0 9.5

G2ometsoud 82.2 80.8 79.3 | 77.9 76.5 73.8 72.4 milled

75.1
63 $3.8 82.3 80.8 79.4 78.0 76.6 75.2 73.9 72.5 71.2
64 83.9 82.4 80.9 79.5 78.1 76.7 75.3 74.0 72.6 71.3
65 $3.9 82.4 81.0 79.6 78.1 76.8 75.4 74.0 72.7
66 84.0 82.5 81.1 79.6 78.2 76.8 75.5 74.1 72.8 71.5

67 84.0 82.6 81.1 79.7 78.3 76.9 75.6 74.2 72.9 71.6
68 84.1 82.6 81.2 79.8 78.4 77.0 75.7 74.3 73.0 TL.
69 84.2 82.7 81.3 79.9 78.5 dda 75.7 74.4 73.1 71.8
70 84.2 82.8 81.3 79.9 78.5 77.2 75.8 7A.5 73.2 71.9
71 84.3 82.8 81.4 80.0 78.6 77.3 75.9 741.6 73.3 72.0

72 84.3 82.9 81.5 80.1 78.7 77.3 1607 | iA ad 73.4 72.1
73 84.4 83.0 81.5 80.1 78.7 V7.4 76.1 74.8 73.5 72.2
74 84.5 83.0 81.6 80.2 78.8 77.5 76.2 74.9 73.6 72.3
75 84.5 83.1 81.7 80.3 78.9 77.6 76.2 74.9 73.7 72.4
76 84.6 83.1 81.7 80.4 73.9 USE 76.3 75.0 73.7 72.5

We 84.6 83.2 81.8 80.4 79.0 aided 76-4 75.1 73.8 72.6
73 81.7 83.3 81.9 80.5 79.1 717.8 76.5 75.2 73.9 72.7
79 84.7 83.3 81.9 80.6 79.1 77.9 76.6 75.3 74.0 72.8
80 84.8 83.4 82.0 80.6 79.2 75.0 76.7 75.4 74.1 72.9
81 84.9 83.5 82.1 | 80.7 79.3 73.0 76.7 75.5 74.2 73.0

82 84.9 83.5 82.1 80.8 79.4 78.1 76.8 15-5 74.3 73.0
83 85.0 83.6 82.2 80.8 79.4 78.2 76.9 75.6 74.4 73.1
84 85.0 83.6 82.3 80.9 79.5 78.3 77.0 75.7 74.5 73-2
85 85.1 83.7 §2.3 81.0 79.6 78.4 77.1 75.8 74.6 73.3
86 85.1 83.7 82.4 81.1 79.7 78.4 V7.1 75.9 74.6 73.4
87 85.2 83.8 82.5 81.1 79.8 78.5 77.2 76.0 74.7 73-5
88 85.2 83.9 $2.5 §1.2 79.9 78.6 77.3 Gol en | eAe San wage
89 85.3 83.9 82.6 $1.3 79.9 73.7 77.4 1621 || 74:9 75.7
90 85.3 84.0 82.6 81.3 80.0 78.7 77.5 76.2 75.0 73.8
91 85.4 84.0 82.7 81.4 80.1 78.5 77.5 76.3 Towa enioe9
92 85.4 84.1 82.8 81.5 80.2 78.9 77.6 76.4 75.2 74.0

93 85.5 84.2 82.8 81.5 80.2 79.0 77.7 76.5 75.2 74.0
94 85.6 84.2 82.9 81.6 80.3 79.0 77.8 76.6 75.3 74.1
95 85.6 84.3 83.0 81.7 80.4 veal 77.9 76.6 75.4 74.2

96 85.7 84.3 83.0 81.7 80.4 79.2 aieo 76.7 75.5 743.3
97 85.7 84.4 83.1 81.8 80.5 79.3 78.0 76.8 75.6 7A.4
93 85.8 84.4 83.1 81.9 80.6 79.3 78.1 76.9 73.7 74.5

99 85.8 84.5 83.2 81.9 80.7 79.4 78.2 77.0 75.8 74.6
100 85.9 84.6 83.3 82.0 80.7 79.5 78.3 77.0 75.8 74.7
101 85.9 84.6 83.3 82.0 80.8 79.6 78.3 77.1 75.9 74.8
102 86.0 $4.7 83.4 82.1 80.9 79.6 78.4 77.2 76.0 74.9
103 86.0 84.7 83.4 82.2 80.9 79.7 78.9 77.3 76.1 74.9
104 86.1 84.8 83.5 82.2 81.0 79.8 78.6 774A 76.2 75.0

| 5.0 5.5 6.9 | 6.5 | 70 Zo 8.0 8.5 9.0 9.5 |

B 83

20

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

Temper- §

ature
of Air,

Fahr-n- §

heit.

20°
21
22
23

32

t— t!' = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.

67.4

67.8
67.9

a
aw
atk WO

{ 10.0 10.5

10.5

OAS AS
tw mwnw we we
eee

a

na OoDODH
www pe w
ontu Ww =

a
os
bo

66.0
66.1
66.3
66.4
66.6

66.7
66 9
67.0
67.1
67.2
67.3

67.4
67.5
67.6
67.7
67.8
67.9

68.1
68.2
68.3
68.4
68.5
63.6

54.1
54.2
54.2
54.3
54.3

54.4
54.5
54.6
54.8
54.9

55.1
55.4
55.7
56.0
56.3

56.6
56.9
57.2
57.5
57.8

58.1
58.3
58.6
58.8
59.0

59.3
59.4
59.5
59.6
59.8
59.9

60.0
60.1
60.3
60.4
60.5
60.6

60.8
60.9
61.0
61.2
61.3
61.4

|
13.5 |

14.0
52.9
53.0
53.0
53.0
53.1

53.1
53.3
53.4
53.5
53.7

53.8
54.1
54.4
54.7
55.0

55.4
55.6
55.9
56.2
56.5

56.8
57.1
57.3
57.6
57.8

58.1
58.2
58.3
58.5
58.6
58.7

58.9
59.0
59.1
59.2
59.4
59.5

59.6
59.8
59.9
60.0
60.1
60.3

54.1
54.4
54.7
55.0
55.3

55.6
55.9
56.1
56.4
56.6

56.9
57.0
57.2
57.3
57.4
57.6

57.7
57.8
58.0
58.1
58.2
58.4

58.5
58.6
58 8
58.9
59.0
59.1

13.5 24.0, 14.5

11.0) 2E.S 12.0] 12.5) 13.0
60.6 | 59.3 | 58.0 | 56.6 | 55.4
60.7 | 59.3 | 58.0 | 56.6 | 55.4
60.7 | 59.4 | 58.0 | 56.7 | 55.5
60.7 | 59.4 | 58.0 | 56.7 | 55.5
60.7 | 59.4 | 58.1 | 56.8 | 55.5
60.7 | 59.4 | 58.1 | 56.8 | 55.6
60.9 | 59.6 | 58.3 | 57.0 | 55.7
61.1 | 59:8 || 58.5 | 67.2 | 065.9
61.3 | 60.0 | 58.6 | 57.3 | 56.0
61.5 | 60.2 | 58.8 | 57.5 | 56.2
61.8 | 60.4 | 59.0 | 57.7 | 56.3
62.1 | 60.7 | 59.3 | 58.0 | 56.6
62.4 | 61.0 | 59.6 | 58.3 | 57.0
62.7 | 61.3 | 59.9 | 58.6 | 57.3
63.0 | 61.6 | 60.2 | 53.9 | 57.6
63.3 | 61.9 | 60.5 | 59.2 | 57.9
63.5 | 62.1 | 60.8 | 59.5 | 58.2
63.8 | 62.4 | 61.1 | 59.8 | 58.5
64:1. | 62.7 | 62-4 || 60.2. | (68.8
64.4 | 63.0 | 61.7 | 60.8 | 59.1
64.6 | 63.3 | 62.0 | 60.6 | 59.4
64.8 | 63.5 | 62.1 | 60.9 | 59.6
63.0 | 63.6 | 62.3 | 61.41 -| 59:8
65.1 || 68:8: "62:5. | 61.8. |) 6020
65.3 | 64.0 | 62.7 | 61.5 | 60.3
65.4 | 64.2 | 62.9 | 61.7 | 60.5
65:6 || 64.3: ||, 63:0) | 61:8 | 60:6
65.7 | 64.4 | 63.2 | 61.9 | 60.7
65.8 | 64.5 | 63.3 | 62.0 | 60.8
65.9 || 64:6 |. 63vd) | 620 41) GIO
66.0 | 64.7 | 63.5 | 62.2 | 61.1
66.1 | 64.9 | 63.6 | 62.4 | 61.2
66.2 | 65.0 | 63.7 | 62.5 | 61.3
66.4 | 65.1 | 63.9 | -62.6 | 61.4
66.5 | 65.2) | G0: 1) 62:7. | 62.6
66:6 | 65.8. | 6iebo1--62.9 | 61.7
66.7 | 65.4 | 64.2 | 63.0 | 61.8
66:8 .| 65-6) || Ges. |. 63.1 ||) 6129
66:9. | .65e7/)| \Gaet 168.2 1) 62-3
67:0" || 46558541 | 26856) 2163-4) ||) «6252
6730 26590 "| 6487) 11-6325) 11, 162-8
67.2 | 66.0 | 64.8 | 63.6 | 62.4
67:4 | 66.1 | 64.9 | 63.7 | -62.6
11.0 11.5 22.0) 12.5 13.0
o4

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

121

Temper- t —t! = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.
pe
Fahren-
hit. | 10.0 10.5) 11.0) LES 12.5 | 13.0 13.5 | 14.0 14.5
62° 69.9 638.6 67.4 66.1 63.7 62.6 61.4 60.3 59.1
63 70.0 68.7 67.5 66.2 63.8 62.7 61.5 60.4 59.3
64 70.1 68.8 67.6 66.3 64.0 62.8 61.6 60.5 59.4
65 70.2 63.9 67.7 66.5 64.1 62.9 61.8 60.6 59.5
66 70.3 69.0 67.8 66.6 64.2 63.0 61.9 60.8 59.7
67 70.4 69.1 67.9 66.7 61.3 63.2 62.0 60.9 59.8
68 70.5 69.2 68.0 66.8 64.4 63.3 62.1 61.0 59.9
69 70.6 69.3 63.1 66.9 64.5 63.4 62.3 61.1 60.0
70 70.7 69.4 68.2 67.0 64.7 63.5 62.4 61.3 60.2
71 70.8 69.5 68.3 67.1 64.8 63.6 62.5 61.4 60.3
72 70.9 69.6 68.4 67.2 66.0 64.9 63.7 62.6 61.5 60.4
73 71.0 69.7 68.5 67.3 66.2 65.0 63.9 62.7 61.6 60.5
74 71.1 69.8 68.6 67.4 66.3 65.1 64.0 62.8 61.7 60.7
75 71.1 69.9 68.7 67.5 66.4 65.2 64.1 63.0 61.9 60.8
76 71.2 70.0 68.8 ‘67.6 66.5 65.3 64.2 63.1 62.0 60.9
77 71.3 70.1 68.9 67.8 66.6 65.5 64.3 63.2 62.1 61.0
78 71.4 70.2 69.0 67.9 66.7 65.6 64.4 63.3 62.2 61.1
oo 71.5 70.3 69.1 68.0 66.8 65.7 64.5 63.4 62.3 61.3
80 71.6 70.4 69.2 68.1 66.9 65.8 64.7 63.6 62.5 61.4
81 71.7 76.5 69.3 68.2 67.0 65.9 64.8 63.7 62.6 61.5
82 71.8 70.6 69.4 68.3 67.1 66.0 64.9 63.8 62.7 61.6
83 71.% 70.7 69.5 68.4 67.2 66.1 65.0 63.9 62.8 61.8
84 72.0 70.8 69.6 65.5 67.3 66.2 65.1 64.0 62.9 61.9
85 72.1 70.9 69.7 68.6 67.4 66.3 65.2 64.1 63.0 62.0
86 72.2 71.0 69.8 65.7 67.5 66.4 65.3 64.2 63.2 62.1
87 72.3 71.1 69.9 68.8 67.7 66.5 65.4 64.4 63.3 62.2
88 72.4 71.2 70.0 63.9 67.8 66.6 65.5 64.5 63.4 62.3
89 72.5 71.3 70.1 69.0 67.9 66.8 65.7 64.6 63.5 62.5
90 | 72.6 71.4 70.2 69.1 68.0 66.9 65.8 64.7 63.6 62.6
91 72.7 71.4 70.3 69.2 68.1 67.0 65.9 64.8 63.7 62.7
92 72.8 71.5 70.4 69.3 68.2 67.1 66.0 64.9 63.9 62.8
93 72.9 71.6 70.5 69.4 68.3 67.2 66.1 65.0 64.0 62.9
94 12.9 71.7 70.6 69.5 68.4 67.3 66.2 65.1 64.1 63.0
95 73.0 71.8 70.7 69.6 63.5 67.4 66.3 65.2 64.2 63.2
96 73.1 71.9 70.8 69.7 68.6 67.5 66.4 65.4 64.3 63.3
97 73.2 72.0 70.9 69.8 68.7 67.6 66.5 65.5 64.4 63.4
938 73.3 72.1 71.0 69.9 68.8 67.7 66.6 65.6 64.5 63.5
99 73.4 72.3 71.1 70.0 68.9 67.8 66.7 65.7 64.6 63.6
100 73.5 72.4 71.2 70.1 69.0 67.9 66.8 65.8 64.8 63.7
101 73.6 72.5 71.3 70.2 69.1 68.0 67.0 65.9 64.9 63.9
102 og 72.6 71.4 70.3 69.2 68.1 67.1 66.0 65.0 64.0
103 73.8 72.7 71-5 70.4 69.3 68.2 67.2 66.1 65.1 64.1
104 73.9 72.8 71.6 70.5 69.4 63.3 67.3 66.2 65.2 64.2
[10.0 10.5 11.0, 12.5 12.0/ 12.5 13.0) 13.5 14.0 14.5
B 85

122

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

Temper- t— t! = Difference of Temperatures of the Air and of the Dew-Point.— Fahrenheit.
apa
Fahren- |
heit. 15.0 15.5 16.0) 16.5 17.0] 17.5) 18.0 18.5 19.0) 49.5°
20° 50.6 49.5 48.4 47.3 46.2 45.1 44.1 43.1 42.1 41.2
21 50.6 49.5 48.4 47.3 46.2 45.1 44.2 43.2 42.2 41.2
22 50.7 49.5 48.4 47.4 46.3 45.2 44.2 43.2 42.2 41.3
23 50.7 49.6 48.5 47.4 46.3 45.2 44.2 43.3 42.3 41.3
24 50.7 49.6 48.5 47.4 46.4 45.3 44.3 43.3 42.3 41.4
25 50.8 49.7 48.5 47.5 46.4 45.4 44.3 43.3 42.4 41.4
26 50.9 49.8 48.6 47.6 46.5 45.4 44.4 43.4 42.4 41.5
27 51.0 49.9 48.7 47.7 46.6 45.5 44.5 43.5 42.5 41.6
28 51.1 50.0 43.8 47.7 46.7 45.6 44.6 43.6 42.6 41.6
29 51.2 50.1 48.9 47.8 46.8 45.7 44.7 43.7 42.7 41.7
30 51.4 50.2 49.0 47.9 46.8 45.8 44.7 43.7 42.7 41.8
31 51.7 50.5 49.4 48.2 47.1 46.1 45.0 44.0 43.0 42.0
32 52.0 50.8 49.7 48.5 47.4 46.4 45.3 44.3 43.3 42.3
33 52.3 51.1 50.0 48.8 47.7 46.6 45.6 44.5 43.5 42.5
34 52.6 51.4 50.3 49.1 48.0 46.9 45.9 44.8 43.8 42.8
35 52.9 51.7 50.6 49.4 48.3 47.2 46.1 45.1 44.1 43.0
36 53.2 52.0 50.9 49.7 48.6 47.5 46.4 45.4 44.4 43.3
37 53.5 52.3 51.2 50.0 48.9 47.8 46.7 45.7 44.7 43.6
38 53.8 52.6 51.5 50.3 49.2 48.1 47.0 46.0 45.0 43.9
39 54.1 52.9 51.8 50.6 49.5 48.4 47.3 46.3 45.3 44.2
AO 54.4 53.2 52a 50.9 49.8 48.7 47.6 46.6 45.6 44.5
41 54.7 53-5 52.3 51.2 50.1 49.0 47.9 46.9 45.8 44.8
42 54.9 53.8 52.6 51.5 50.4 49.3 48.2 A7.2 46.1 45.1
43 55.2 54.0 52.9 51.8 50.7 49.6 48.5 47.5 46.4 45.4
Ad 53.5 54.5 53.2 52.1 50.9 49.9 48.8 47.7 46.7 45.7
45 55.7 54.6 53.4 52.3 51.2 50.2 49.1 48.0 47.0 46.0
46 55.9 547 53.6 52.5 51.4 50.4 49.3 48.3 47.2 46.2
AT 56.0 54.9 53.8 52.7 51.6 50.6 49.5 48.5 A7.5 46.5
48 56.2 55.0 54.0 52-9 51.8 50.8 49.8 48.7 47.7 46.7
49 56.3 Die 54.1 53.1 52.0 51.0 50.0 49.0 47.9 47.0
50 56.5 D5-4 54.3 53.2 52.2 51.2 50.2 49.2 48.2 47.2
51 56.6 55.5 54.4 53.4 52.3 51.3 50.3 49.3 48.3 A7.4
52 56.7 55.6 54.6 53.5 52.5 51.5 50.5 49.5 48.5 47.5
53 56.9 55.8 54.7 53.6 52.6 51.6 50.6 49.6 48.6 47.7
54 57.0 55.9 54.8 53.8 52.7 51.7 50.7 49.8 48.8 47.8
55 57-1 56.0 55.0 53.9 52.9 51.9 50.9 49.9 48.9 48.0
56 57.3 56.2 55.1 54.1 53.0 52.0 51.0 50.0 49.1 48.1
57 57.4 56.3 55.2 54.2 53.2 52.2 51.2 50.2 49.2 48.3
58 57.5 56.4 55.4 54.3 53.3 52:3 51.3 | 50.3 49.4 48.4
59 SILC 56.6 55-5 54.5 53.4 52.4 51.4 50.5 49.5 48.6
60 57.8 56.7 55.6 54.6 53.6 52.6 51.6 50.6 49.7 48.7
61 57.9 56.8 55.8 54.7 53.7 52.7 bay, 50.8 49.8 48.9
62 58.0 57.0 55.9 54.9 53.8 52.8 BES 50.9 49.9 49.0
15.0 15.5 16.0 16.5 17.0] 17.5 18.0 18.5 19.0] 19.5
B 86

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT. 128

sa —

t— t' = Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.

Temper-
ature

of Air, ;

Fal - '

heit. 15.5 16.0 16.5 | 17.0] 17.5) 18.0; 18.5 19.0) 19.5
62° 58.0 57.0 55.9 54.9 53.8 52.8 51.9 50.9 | 49.9 49.0

58.2 57.1 56.0 55.0 54.0 53.0 52.0 51.0 50.1 49.1
58.3 57.2 56.2 55.1 54.1 53.1 52.1 51.2 50.2 49.3
58.4 57.4 56.3 55.3 54.3 53.3 52.3 51.3 50.4 49.4
58.6 57.5 56.4 55.4 54.4 53.4 52.4 51.5 50.5 49.6

63
64
65
66

58.7 57.6 56.6 55.5 54.5 53.5 52.6 51.6 50.6 49.7
58.8 57.8 56.7 55.7 54.7 53.7 52.7 51.7 50.8 49.9
59.0 57.9 56.8 55.8 54.8 53.8 52.8 51.9 50.9 50.0
59.1 58.0 57.0 55.9 54.9 53.9 53.0 52.0 51.1 50.1
59.2 58.2 57.1 56.1 55.1 54.1 53.1 52.1 51.2 50.3

67
68
69
70
71

59.3 58.3 57.2 56.2 55.2 54.2 53.2 52.3 51.3 50.4
59.5 58.4 57.4 56.3 55.3 54.3 53.4 52.4 51.5 50.6
59.6 58.5 57.5 56.5 55.5 54.5 53.5 52.6 51.6 50.7
59.7 58.7 57.6 56.6 55.6 54.6 53.6 52.7 51.7 50.8
59.8 58.8 57.8 56.7 55.7 54.7 53.8 52.8 51.9 51.0

72
73
74
75
76

60.0 58.9 57.9 56.9 55.9 54.9 53-9 53.0 52.0 51.1
60.1 59.1 58.0 57.0 56.0 55.0 54.0 53.1 52.2 51.2
60.2 59.2 58.1 57.1 56.1 55.1 54.2 53.2 52.3 51.4
60.3 59.3 58.3 57.3 56.3 55.3 54.3 53.4 52.4 51.5
60.5 59.4 58.4 57.4 56.4 55.4 54.5 53.5 52.6 51.7

ae
78
79
80
81

82
83
84
85
86

60.6 59.6 58.5 57.5 56.5 55.5 54.6 53.6 52.7 51.8
60.7 59.7 58.6 57.6 56.6 55.7 54.7 53.8 52.8 51.9
60.8 59.8 58.8 57.8 56.8 55.8 54.8 53.9 53.0 52.1
60.9 59.9 58.9 57.9 56.9 55.9 55.0 54.0 53.1 52.2
61.1 60.0 59.0 58.0 57.0 56.1 55.1 54.2 53.2 52.3

87
88
89

61.2 60.2 59.1 58.1 57.2 56.2 55.2 54.3 53.4 52.5
61.3 60.3 59.3 58.3 57.3 56.3 55.4 54.4 53.5 52.6
61.4 60.4 59.4 58.4 57.4 56.5 55.5 54.6 53.7 52.7
61.6 60.5 59.5 58.5 57.6 56.6 55.6 54.7 53.8 52.9
61.7 60.7 59.6 58.7 57.7 56.7 55.8 54.8 53.9 53.0
61.8 60.8 59.8 58.8 57.8 56.9 55.9 55.0 54.1 53.2

61.9 60.9 59.9 58.9 57.9 57.0 56.0 55.1 54.2 53.3
62.0 61.0 60.0 59.0. 58.1 57.1 56.2 55.2 54.3 53.4
62.1 61.1 60.1 59.2 58.2 57.2 56.3 55.4 54.5 53.6
62.3 61.3 60.3 59.3 58.3 57.4 56.4 55.5 54.6 53.7
62.4 61.4 60.4 59.4 58.4 57.5 56.5 55.6 54.7 53.8
62.5 61.5 60.5 59.5 58.6 57.6 56.7 55.8 54.9 54.0

62.6 61.6 60.6 59.6 58.7 57.7 56.8 55.9 55.0 54.1
62.7 61.7 60.7 59.8 58.8 57.9 56.9 56.0 55.1 54.2
62.8 61.9 60.9 59.9 58.9 58.0 57.1 56.2 55.3 54.4
63.0 62.0 61.0 60.0 59.1 58.1 57.2 56.3 55.4 54.5
63.1 62.1 61.1 60.1 59.2 58.3 57.3 56.4 55.5 54.6
63.2 62.2 61.2 60.3 59.3 58.4 57.5 56.6 55.7 54.8

15.0 15.5 | 16.0 16.5 17.0] 17.5 18.0 18.5 19.0) 19.5

124

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT.

—
Temper- t— t! = Difference of Temperatures of the Air and of the Dew-Point.— Fahrenheit. |
ane, b |
Fahren- |
het. | 20.0 20.5 21.0) 21.5 | 22.0] 22.5 | 23.0 | 23.5 | 24.0 24.5
20° 40.2 39.3 38.4 37.5 36.6 35.8 34.9 34.1 33.3 32.5
21 40.3 39.4 338.4 37.6 36.7 35.8 35.0 34.2 33.4 32.6
22 40.3 39.4 38.5 37.6 36.8 35.9 35.1 34.3 33.5 32.7
23 40.4 39.5 35.6 37.7 36.8 36.0 35.2 34.4 33.6 32.8
24 40.4 39.6 38.6 37.8 36.9 36.1 35.2 34.4 33.6 32.9
25 40.5 39.6 38.7 37.8 37.0 36.2 35.3 34.5 33.7 33.0
26 40.5 39.7 38.8 37.9 37.0 36.2 35.4 34.6 33.8 33.1
27 40.6 39.7 38.8 38.0 37.1 36.3 35.5 34.7 33.9 33.1
28 40.7 39.8 38.9 38.0 37.2 36.3 35.5 34.7 34.0 83.2
29 40.8 39.9 38.9 38.1 37.2 36.4 35.6 34.8 34.0 33.3
30 40.8 39.9 39.0 38.1 37.3 36.5 35.7 34.9 34.1 33.4
31 41,1 | 402 | #$92° | fgeta’ || Mo7e5 | |) ser7 | | £8509 })| VS5u))| W348 4 || 876
32 41.3 | 40:4: | $8955 |: 98i6 f| cavi7 (| W370 1) d36c1 | 48588) Heke5n | 493-8
33 41.6 40.6 39.7 38.8 38.0 37.2 36.3 55.5 34.7 34.0
34 41.8 40.9 39.9 39.1 38.2 37.4 36.5 35.7 34.9 34.2
35 42.1 41.1 40.2 39.3 38.4 37.7 36.7 35.9 35.1 34.4
36 42.3 41.4 40.4 39.6 38.7 37.9 37.0 36.2 35.4 34.6
37 42.6 41.7 40.7 39.8 38.9 38.2 37.2 36.4 35.6 34.8
38 42.8 42.0 41.0 40.1 39.2 38.4 37.5 36.6 35.8 35.0
39 43.1 42.3 41.3 40.4 39.5 38.6 37.7 36.9 36.0 35.2
40 43.3 42.6 41.6 40.7 39.8 38.9 38.0 37.1 36.3 35.4
41 43.7 42.9 41.9 41.0 40.0 39.1 38.3 37.4 36.5 35.7
42 44.0 43.2 42.2 41.2 40.3 39.4 38.5 37.7 36.8 36.0
43 44.3 43.4 42.5 41.5 40.6 39.7 38.8 38.0 37-1 36.3
Ad 44.7 43.7 42.8 41.8 40.9 40.0 39.1 38.2 37.4 36.6
45 45.0 44.0 43.1 42.1 41.2 40.3 39.4 38.5 37.7 36.8
46 45.2 44.3 43.3 42.4 41.4 40.5 39.7 38.8 37.9 37.1
47 45.5 44.5 43.6 42.6 41.7 40.8 39.9 39.1 38.2 37.4
48 45.7 41.8 43.8 42.9 42.0 41.1 40.2 39.3 38.5 37.6
49 46.0 45.0 44.1 43.2 42.2 41.3 40.5 39.6 38.7 37.9
50 46.2 45.3 44.3 43.4 42.5 41.6 40.7 39.9 39.0 37.2
51 46.4 45.4 44.5 43.6 42.7 41.8 40.9 40.1 39.2 38.4
52 46.6 45.5 44.7 43.8 42.9 42.0 41.2 40.3 39.5 38.6
53 46.7 45.8 44.9 44.0 43.1 42.2 41.4 40.5 39.7 38.9
54 46.9 46.0 45.1 44.2 43.3 42.4 41.6 40.8 39.9 39.1
55 47.0 46.1 45.2 44.4 43.5 42.6 41.8 41.0 40.1 39.3
56 47.2 46.3 45.4 44.5 43.6 42.8 42.0 41.1 40.3 39.5
57 47.3 46.4 45.5 44.7 43.8 42.9 42.1 41.3 40.5 39.6
58 47.5 46.6 45.7 44.8 43.9. 43.1 42.3 41.4 40.6 39.8
59 47.6 46.7 45.8 45.0 44.1 43.2 42.4 41.6 40.8 40.0
60 47.8 46.9 46.0 45.1 44.2 43.4 42.5 A1.7 40.9 40.
61 47.9 47.0 46.1 45.3 44.4 43.5 42.7 41.9 41.1 40.3
62 48.1 47.2 46.3 45.4 44.5 43.7 42.8 42.0 41.2 40.4
20.0 20.5 21.0 21.5 22.0] 22.5 23.0 23.5 24.6 24.5 |
B 88

RELATIVE HUMIDITY FROM THE TEMPERATURE OF THE DEW-POINT. 125

Temper- t— t'= Difference of Temperatures of the Air and of the Dew-Point. — Fahrenheit.
ature

of Air,

Fahren- '

neit. | 20.0 20.5 te 22.0] 22.5 23.0) 23.5 24.0) 24.5

|
‘“

62° | 48.1 47.2 46.3 45.4 44.5 43.7 42.8 42.0 41.

2 40.4
63 48.2 47.5 46.4 45.5 44.7 43.8 43.0 42.2 41.4 40.6
64 48.4 47.5 46.6 45.7 44.8 44.0 43.1 42.3 41.5 40.7
65 48.6 47.6 46.7 45.8 45.0 44.1 43.3 42.5 41.7 40.9
66 48.7 47.8 46.9 46.0 45.1 44.3 43.4 42.6 41.8 41.0

67 48.8 47.9 47.0 46.1 45.3 44.4 43.6 42.8 42.0 41.2
68 48.9 48.0 47.2 46.3 45.4 44.6 43.7 42.9 42.1 41.3
69 49.1 48.2 47.3 46.4 45.6 44.7 43.9 43.1 42.3 41.5
70 49.2 48.3 47.4 46.6 45.7 44.9 44.0 43.2 42.4 41.6
71 49.4 48.5 47.6 46.7 45.9 45.0 44.2 43.4 42.6 41.8

72 49.5 48.6 47.7 46.9 46.0 45.2 44.3 43.5 42.7 41.9
73 49.6 48.8 47.9 47.0 46.1 45.3 44.5 43.7 42.9 42.1
74 49.8 48.9 48.0 47.1 46.3) 45.4 44.6 43.8 43.0 42.2

73 49.9 49.0 48.2 47.3 46.4 45.6 44.8 44.0 43.1 42.4
76 50.1 49.2 48.3 A7.4 46.6 45.7 44.9 44.1 43.3 42.5
V7 50.2 49.3 48.5 47.6 46.7 45.9 45.1 44.2 43.4 42.6
78 50.3 49.5 48.6 A7.7 46.9 46.0 45.2 44.4 43.6 42.8
79 50.5 49.6 48.7 47.8 47.0 46.2 45.3 44.5 3.7 43.0
80 50.6 49.7 48.9 48.0 47.2 46.3 45.5 44.7 43.9 43.1
81 50.8 49.9 49.0 48.1 47.3 46.5 45.6 44.8 44.0 43.2
82 50.9 50.0 49.2 48.3 47.4 46.6 45.8 45.0 44.2 43.4
83 51.0 50.1 49.3 48.4 A7.6 46.8 45.9 45.1 44.3 43.5
84 51.2 50.3 49.4 48.6 47.7 46.9 46.1 45.3 44.5 43.7
85 51.3 50.4 49.6 48.7 47.9 47.0 46.2 45.4 44.6 43.8
86 51.4 50.6 49.7 48.8 48.0 47.2 46.4 45.6 44.8 44.0
87 51.6 50.7 49.8 49.0 48.1 47.3 46.5 45.7 44.9 44.1
88 51.7 50.8 50.0 49.1 48.3 47.5 46.6 45.8 45.0 44.3
59 51.9 51.0 50.1 49.3 48.4 47.6 46.8 46.0 45.2 44.4
90 52.0 51.1 50.3 49.4 48.6 47.7 46.9 46.1 45.3 44.6
91 52.1 51.3 50.4 49.5 48.7 47.9 47.1 46.3 45.5 44.7
92 52.3 51.4 50.5 49.7 48.8 48.0 47.2 46.4 45.6 44.8
93 52.4 51.5 50.7 49.8 49.0 48.2 47.4 46.6 45.8 45.0
94 52.5 51.7 50.8 50.0 49.1 48.3 47.5 46.7 45.9 45.1
95 52.7 51.8 50.9 50.1 49.3 45.4 47.6 46.8 46.1 45.3
96 52.8 51.9 51.1 50.2 49.4 48.6 47.8 47.0 46.2 45.4
97 52.9 52.1 51.2 50.4 49.5 48.7 47.9 47.1 46.3 45.6
98 53.1 52.2 51.4 50.5 49.7 48.9 48.1 47.3 46.5 45.7
99 53.2 52.3 51.5 50.6 49.8 49.0 48.2 47.4 46.6 45.9
100 53.4 52.5 51.6 50.8 50.0 49.1 48.3 47.5 46.8 46.0
101 53.5 52.6 51.8 50.9 50.1 49.3 48.5 47.7 46.9 46.2 }
102 53.6 52.8 51.9 51.1 50.2 49.4 48.6 47.8 47.1 46.3
103 53.8 52.9 52.0 51.2 50.4 49.6 48.8 48.0 47.2 46.4
104 53.9 53.0 52.2 51.3 50.5 49.7 48.9 48.1 47.3 46.6
|
20.0 20.5 21.0 21.5 22.0| 22.5 23.0 23.5 24.0 24.5

|

B 3g

126

Abia xe

FACTOR cae FOR COMPUTING THE RELATIVE HUMIDITY, OR THE DEGREE OF MOISTURE

OF THE AIR, EXPRESSED IN HUNDREDTHS, FROM ITS ABSOLUTE
HUMIDITY GIVEN IN ENGLISH MEASURES.

Tue Relative Humidity, or the degree of moisture of the air, is, as explained
above, the ratio of the quantity of vapor contained in the air to the quantity it could
contain at the temperature observed, if fully saturated.

If we call

The force of vapor contained in the air = f,
The maximum of the force of vapor at the temperature of the air = F,
The point of saturation = 100,

we have the proportion,
Relative Humidity : 100 :: f: F,
and

ee = Relative Humidity in Hundredths.

But as ea =e a”. it is obvious that the operation indicated by the former

expression, Viz. —— would be reduced to a simple multiplication, if we had a

table of the factors . Such a table is obtained by dividing the constant number
100 by each number in the Table of Elastic Forces of Vapor, and substituting the
quotients for the tensions, or forces of vapor.

The following Table gives the factor oe for every tenth of a degree from 0° to
104° Fahrenheit, corresponding to the Forces of Vapor in Table VI., or Regnault’s

table reduced to English measures.

Use oF THE TABLE.

The force of vapor contained in the air, or its absolute humidity, being given in
English measures, multiply the number expressing it by the factor in the table cor-
responding to the temperature of the air at the time of the observation ; the result
will be the Relative Humidity in Hundredths.

Evamples.

1. Suppose the temperature of the air to be = 60° Fahrenheit.
ce ‘“* force of vapor in the air to be = .888 English inch.

Opposite 60° is found in the table the factor 193.1.
Then 0.388 x 193.1 = 74.9, Relative Humidity in Hundredths.

2. Suppose the temperature of the air to be = 74°.5 Fahrenheit.

ee ** force of vapor in the air to be = .650 English inch.
Table gives for 74°.5 the factor 117.2.
Then 0.650 x 117.2 = 76.2, Relative Humidity required.

B 90

127
Ix. FACTOR = FOR COMPUTING THE RELATIVE HUMIDITY, OR THE
DEGREE OF MOISTURE OF THE AIR,

EXPRESSED IN HUNDREDTHS, FROM ITS ABSOLUTE HUMIDITY
GIVEN IN ENGLISH INCHES.

Temper- Tenths of Degrees.

heit. | Q, | 1. 2. 3. 4. 5. 6. 7. 8. 9.

0° | 2306 2295 2285 2275 2264 2254 2243 2233 | 2222 2211
1 2201 2191 2181 2171 2162 2152 2142 2132 2122 2111
2 2101 2092 2083 2074 2064 2055 2045 2036 2026 2017
3 2007 1998 1990 1981 1972 1963 1954 1945 1936 1927
4 1918 1910 1901 1893 1885 1876 1868 1859 1851 1842

5 1834 1826 1818 1810 1802 1794 1786 1777 1769 1761
6 1753 1745 1738 1730 1722 1714 1707 1699 1691 1683
7 1675 1668 1660 1653 1646 1638 1631 1623 1616 1608
8 1600 1594 1557 1580 1572 1565 1558 1551 1544 1537
9 1529 1523 1516 1509 1503 1496 1489 1482 1475 1469

10 1462 1455 1449 1443 1436 1430 1423 1417 1410 1404
11 1397 1391 1385 1379 1373 1367 1561 1355 1348 1342
12 1336 1330 1524 1319 1313 1307 1301 1295 1289 1284
13 1278 1272 1267 1261 1255 1250 1244 1239 1233 1228
14 1222 1217 1211 1206 1200 1195 1189 1184 1178 1173

15 1167 1162 1157 1151 1146 1141 1136 1130 1125 1120
16 1114 1109 1104 1099 1094 1089 1084 1079 1074 1069
17 1064 1059 1055 1050 1045 1040 1035 1031 1026 1021
18 1016 1012 1007 1003 998.2 | 993.6 | 989.1 | 984.5| 979.9| 975.3 |
19 970.6 | 966.4 | 962.2 | 957.9] 953.7] 949.4 | 945.0] 940.7] 936.3| 931.9

20 927.5 | 923.5] 919.5 | 915.5] 911.4 | 907.4 903.3 | 899.1] 895.0} 890.8
21 886.7 | 882.9] 879.1 | 875.3| 871.1] 867.6 | 863.7 | 859.8 | 855.8| 851.9
22 817.9 | 844.3] 840.7| 837.1] 833.4 |] 829.8 | 826.1 | 822.14) 818.7/ 815.0
23 811.2 | 807.8) 804.3 | 800.8 | 797.3 | 793.8 | 790.2 | 786.7| 783.1] 779.5
24 775.9 | 772.6 | 769.3) 766.0 | 762.7 | 759.3 | 756.0 | 752.6 | 749.2) 745.8
25 7412.4 | 739.3) 736.2 | 733.0} 729.9 | 726.7 | 723.5 | 720.3| 717.1 | ° 713.9
|

26 710.6 | 707.7} 704.7 | 701.8] 698.8 | 695.8 | 692.8 | 689.7| 686.7| 683.6
27 680.5 | 677.8 | 675.0 | 672.1| 669.3 | 666.5 | 663.6 | 660.7| 657.8) 654.9
28 652.0 | 649.4 | 646.7 | 644.1| 641.4 | 638.7 | 636.0 | 633.3) 630.5| 627.8
29 625.0 | 622.5 | 620.0) 617.5| 614.9 | 612.4] 609.8 | 607.2| 604.6| 602.0
30 599.4] 597.1 | 594.7 | 592.3] 589.9 |] 587.4] 585.0 | 582.6) 580.1] 577.6
31 575.1 | 572.9 | 570.7 | 568.4 | 566.2 | 563.9 | 561.6 | 559.2) 556.9 554.5

128

100

FACTOR F? FOR COMPUTING THE RELATIVE HUMIDITY.

oe

Temper- Tenths of Degrees.

~ature

of Air, SSS

Fahren-

heit. 0. 1. 2. 3. 4. 3D. 6. Ze 8.

82° | 552.2 | 550.0 | 547.8 | 545.7 | 543.6 | 6541/4 | 639.3 | 537.2 | 535.1

33 | 530.9 | 528.8 | 526.8 | 524.7 | 522.7 | 520.6 | 518.6 | 516.5 | 514.5

34 510.5 | 508.5 | 506.5 | 504.5 | 502.5 | 500.5 | 498.6 | 496.6 | 494.7

35 | 490.8 | 488.9 | 487.0 | 485.1 | 483.2 | 481.3 | 479.4 | 477.5 | 475.6

36 471.9 | 470.1 | 468.2 | 466.4 | 464.6 | 462.8 | 461.0 | 459.2 | 457.4

37 453.8 | 452.0 | 450.3 | 448.5 | 446.8 | 445.0 | 443.3 | 441.6 | 439.9
| 38 436.4 | 484.7 | 433.1 | 431.4 | 429.7 | 428.0 | 426.4 | 424.7 | 423.1
| 39 419.8 | 418.2 | 416.6 | 415.0 | 413.4 | 411.8 | 410.2 | 408.6 | 407.0

40 403.9 | 402.4 | 400.8 | 399.3 | 397.8 | 396.2 | 394.7 | 393.2 | 391.7

41 388.7 | 387.2 | 385.8 | 384.3 | 382.9 | 381.4 | 380.0 | 378.5 | 377.1

42 374.3 | 372.9 | 371.5 | 370.0 | 368.6 | 367.3 | 365.9 | 364.5 | 363.1

43 360.4 | 359.0 | 357.6 | 356.3 | 354.9 | 353.6 | 352.3 | 350.9 | 349.6

44 347.0 | 345.6 | 344.3 | 343.0 | 341.7 | 340.4 | 339.2 | 337.9 | 336.6

45 334.1 | 332.8 | 331.6 | 330.3 | 328.1 |] 327.8 | 326.6 | 325.4 | 324.1

AG: (| 32127 | 32055 1 731933 | (31851) |e316-9) |) 315.7 || Slo | 2318-3) olor Sli

AT 309.8 | 308.7 | 307.5 | 306.4 | 305.2 | 304.1 | 302.9 | 301.8 | 300.7 | 299.6

48 298.5 | 297.3 | 296.2 | 295.1 | 294.0 | 292.9 | 291.9 | 290.8 | 289.7 | 288.6

49 287.6 | 286.5 | 285.4 | 284.4 | 283.3 | 282.3 | 281.3 | 280.2 | 279.2 | 278.2
50 Q7Fak (| VIG | VIB | VIA Wo VTa fy VIZ N | AT || 270.) ye S69 aleseeee

51 267.2 | 266.2 | 265.2 | 264.3 | 263.3 | 262.3 | 261.4 | 260.4 | 259.5 | 258.5

52 257.6 | 256.6 | 255.7 | 254.8 | 253.8 | 252.9 | 252.0 | 251.1 | 250.2 | 249.3

53 218.3 | 247.4 | 246.5 | 245.6 | 244-7 | 243.9 | 248.0 | 242°1 | 241.2 | 240-3
| 5A 239.5 | 288.6 | 237.7) | 236.9 | 236.0 | 235.1 | 23423 | 233%4) || 232%65)) oan
|| 55 | 230.9 | 230.1 | 229.2 | 228.4 | 297.6 | 296.8 | 225.9 | 295.1 | 224.3 | 223.5
| 56 292.7 || 221.9 | 227-1 | 220/3.1| “219.5. ), 218.7. |) 207.9) (20760) |) 206.45) 215.6

57 214.8 | 214.0 | 213.3 | 212.5 | 211.8 | 211.0 | 210.2 | 209.5 | 208.7 | 208.0

58 207.3 | 206.5 | 205.8 | 205.0 ! 204.3 | 203.6 | 202.9 | 202.2 | 201.4 | 200.7

59 200.0 | 199.3 | 198.6 | 197.9 | 197.2 | 196.5 | 195.8 | 195.1 | 194.4 | 193.8
| ° 60 193.1 | 192.4 | 191.7 | 191.0 | 190.4 | 189.7 | 189.0 | 188.4 | 187.7 | 187.0

61 186.4 | 185.7 | 185.1 | 184.4 | 183.8 | 183.1 | 182.5 | 181.8 | 181.2 | 180.6

62 179.9 | 179.3 | 178.7 | 178.0 | 177.4 | 176.8 | 176.2 | 175.6 | 174.9 | 174.3
| 63 VIS27 | V7 | 1725: | 1-9 | TAS FO.72 4) 170.0) | 16925 GS-9) | 6s23
hae kG 167.7 | 167.1 | 166.6 | 166.0 | 165.4 | 164.8 | 164.3 | 163.7 | 163.1 | 162.5
Hy 65 162.0 | 161.4 | 160.9 | 160.3 | 159.7 | 159.2 | 158.6 | 158.1 | 157.5 | 157.0

66 15605 |)165:9 | 915524 || 1544811) 5423 4153.8: | 953-2) laees |i A220) dole
|| 67 151.1 | 150.6 | 150.1 | 149.6 | 149.1 ]| 148.6 | 148.1 | 147.6 | 147.1 | 146.6

0. I. 2. 3. 4. od. 6. Ze 8. 9.
|
Se |

00
FACTOR me FOR COMPUTING THE RELATIVE HUMIDITY. 129

Tenths of Degrees.

0. 1. 2. 3. 4. 3. 6. Ze 8. 9.

146.0 | 145.6 | 145.1 | 144.6 | 144.1 143.6 143.1 | 142.6 | 142.1 141.6
141.2 | 140.7 | 140.2 | 139.7 | 139.2 | 138.8 138.3 | 137.8 137.4 | 136.9
136.4 | 136.0 | 135.5 | 135.1 | 134.6 | 134.1 133.7 | 133.2 132.8 | 132.3 ||
131.9 | 131.4 | 131.0 | 130.5 | 130.1 129.7 129.2 | 128.8 128.3 | 127.9
127.5 | 127.1 | 126.6 | 126.2 | 125.8 | 125.3 124.9 | 124.5 | 124.1 | 123.7

73 123.3 | 122.8 | 122.4 | 122.0 | 121.6 | 121.2 120.8 | 120.4 | 120.0 | 119.6
74 119.2 | 118.8 | 118.4 | 118.0 | 117.6 117.2 116.8 | 116.4 | 116.0 | 115.6
75 115.3 | 114.9 | 114.5 | 114.1 | 113.7 | 113.3 ISO U2 Gai) 111.9
76 111.5 | 111.1 | 110.7 | 110.4 | 110.0 | 109.6 109.3 | 108.9 | 108.6 | 108.2
77 107.9 | 107.5 | 107.1 | 106.8 | 106.4 | 106.1 105.7 | 105.4 | 105.1 104.7

78 104.4 | 104.0 | 103.7 | 103.3 | 103.0 | 102.7 102.3 | 102.0 | 101.7 | 101.3
79 101.0 | 100.7 | 100.3 | 100.0 99.68] 99.35 | 99.02| 98.70} 98.38 | 98.06
80 97.73 | 97.42 | 97.10 | 96.78; 96.47] 96.15 95.84 | 95.52 | 95.21 | 94.90 |
81 94.59 | 94.29 | 93.98 | 93.67| 93.37] 93.06 | 92.76 {| 92.46 | 92.16 | 91.86 ||
82 91.56 | 91.26; 90.97 | 90.67] 90.38] 90.09 | 89.80; 89.51 | 89.22 | 88.93

83 88.64] 88.36} 88.07 | 87.79| 87.50] 87.22 | 86.94) 86.66 | 86.38 | 86.10
84 85.83 | 85.55) 85.27 | 85.00) 84.73] 84.46 | 84.19} 83.92 | 83.65 | :
85 83.12 | 82.85 | 82.59 | 82.32] 82.06] 81.80 | 81.54) 81.28 | 81.02
86 80.51| 80.25] 80.00 | 79.71) 79.49] 79.24 | 78.99| 78.74 78.49 | 78.24 ||
87 MeO Neti Onl ent OUN iit ec On| dic OMM ue Ontiie | a O.D2) |= edOe2S ln e7GcO4 |

9 a} (9)
S oo
7) 0
a

88 75.56 | 75.32 | 75.08 | 74.85 | 74.61] 74.387 | 74.14) 73.91 73.67 | 73.44

89 73.21 | 72.98 | 72.75 | 72.52 | 72.29] 72.06 71.84 | 71.61 | 71.39 | 71.16
90 70.94 | 70.72) 70.49 | 70.27] 70.05] 69.83 | 69.61! 69.39 69.18 | 68.96
91 68.74 | 68.53 | 68.32 | 68.10| 67.89] 67.68 67.47 | 67.26 | 67.05 | 66.84
92 66.63 | 66.42 | 66.22 | 66.01 | 65.81] 65.60 65.40 | 65.19 | 64.99 64.79 ||

93 | 64.59] 64.39] 64.19 | 63.99| 63.79] 63.59 | 63.40| 63.20 63.01 | 62.81 |
94 | 62.62| 62.43| 62.24] 62.04| 61.85] 61.66| 61.47| 61.29 | 61.10| 60.91
95 | 60.72} 60.54] 60.35 | 60.17! 59.98] 59.80 | 59.62 5943 | 59.25 59.07 |
96 | 58.89| 58.71| 58.53 | 58.85| 58.17| 58.00 | 57.82] 57.64 | 57.47 57.29 |
97 | 57.12] 56.91| 56.77 | 56.60| 56.42| 56.25 | 56.08 | 55.91 | 55.74 | 55.57 |
98 | 55.40) 55.23) 55.06 | 54.90/ 54.73] 54.56 | 54.40] 54.23 | 54.07 | 53.91 |

1 99 53.74; 5358) 53.42 | 53.26) 53.09] 52.93 52.77 | 52:61 | 52.45 | 52.30
100 52.14] 51.98 | 51.82 | 51.67] 51.51 51.36 51.20} 51.05 50.90 | 50.74 ||
101 50.59 | 50.44) 50.29 | 50.14) 49.99] 49.84 49.69 | 49.54 49.39 | 49.24 ||
102 49.10) 48.95) 48.80 | 48.66) 48.51 48.37 | 48.22} 48.08 47.94 | 47.79 ||
103 47.65 | 47.51 | 47.37 | 47.23) 47.09] 46.95 46.81 | 46.67 46.53 | 46.40 |
104 46.26 | 46.12] 45.99 | 45.85| 45.72] 45.58 45.45 | 45.31 | 45.18 | 45.04

0. 1. 2. Be 4. 3. 6. Perel 28s 9.

130

ACT oly Ea: XS

WEIGHT OF VAPOR, IN GRAINS TROY,

CONTAINED IN A CUBIC FOOT OF SATURATED AIR, UNDER A BAROMETRIC PRESSURE OF
30 ENGLISH INCHES, AT TEMPERATURES BETWEEN 0° AND 105° FAHRENHEIT.

THE weight of a litre of dry air at the temperature of zero Centigrade, or 32°
Fahrenheit, and under a barometric pressure of 760 millimetres, as determined by
the experiments of Regnault (Mémoires de Vl’ Institut, Tom. XXI. p. 157), and corrected
for a slight error of computation (see above, p. 38), is 1.293223 grammes. The co-
efficient of expansion of the air, according to the same physicist, is 0.00867 for 1°
Centigrade ; and the theoretic density of vapor is nearly 0.622, or 8, of that of the air
at the same temperature and pressure. From these elements the weight of ‘the vapor
contained in a determined volume of air, the temperature and humidity of which are
known, can be deduced.

Reducing these values to English measures, 1 litre being = 61.02705 cubic inches,
and | gramme = 15.43208 grains Troy, we have

1.293223 grammes = 19.9571208 grains,
and
61.027051 cubic inches : 19.9571208 grains : : 1 cubic inch : 0.382702 grain.

Therefore, the weight of a cubic foot of dry air, at 32° Fahrenheit, under a pressure of
760 millimetres, or 29.922 English inches, is = 0.32702 grain & 1728 = 565.0923
grains Troy. Under a barometric pressure of 30 inches, it becomes

30

Sore < 565.0923 = 566.5654 grains.

The coefficient for the expansion of the air becomes 0.0020361 of its bulk for 1°
Fahrenheit.
Now, if we call
t = the temperature of the air;
W = the weight of vapor in a saturated air at the temperature ¢ ;
F = the maximum of the force of vapor due to the temperature ¢, as given
in the tables ;

then the weight of the vapor contained in a cubic foot of saturated air is given by the
formula
566.5654 grains EF

W == 05622 Siete ee) eae
1+ 0.002036 X (¢— 32°) 30

’

from which the values in Table X. have been computed. The forces of vapor due to
the temperatures in the first column are those of Regnault, as given in Table VI.

It is evident, that, in order to find the weight of the vapor contained in the air
at any state of humidity and pressure, it suffices to substitute for the normal values of

ah the force of vapor and the barometric pressure given by the observation.

B 94

131

X. WEIGHT OF VAPOR, IN GRAINS TROY,

CONTAINED IN A CUBIC FOOT OF SATURATED AIR, AT TEMPERATURES
05° FAHRENHEIT.

BETWEEN 0° AND 1

Temper-] Force Weight Temper-] Force Weight Temper-] Force Weight
ature of of Differ- ature of of Differ- ature of of Differ-
of Vapor Vapor | ence. of Vapor Vapor | ence. of Vapor Vapor | ence.
Air, | in Eng. Tee Air, | in Eng in Air, | in Eng in
Fahren.}] Inches. | Grains. Fahren.} Inches. | Grains. Fahren.}| Inches. | Grains
O° | 0.013 | 0.545 | 35° | 0.204 | 2.379 70°] 0.733 | 7.992]
1 | 0.015 | 0.569 one 36 | 0.212 | 2.469 meee 71 | 0.758 | 8.252 oe
2 | 0.0418 | 0.595 eae 37 | 0.220 | 2.563 Aue 72 | 0.784 | 8.521 oe
3 | 0.050 | 0.621) "| | 38 | 0.229 | 2.659 | 73 | 0.811 | 8.797| |,
4 | 0.052 | 0.649 | 9°, | 39 | 0.288 | 2.759 | 74 | 0.839 | 9.081) 0
5 | 0.055 | 0.678 | |... || 40 | 0.248 | 2.862] 75 | 0.868 | 9.372) |.
6 | 0.057 | 0.708 nee 41 10.257 | 2.967 Bees 76 | 0.897 | 9.670 ae
7 | 0.060 | 0.739 | |, || 42 | 0.267 | 3.076 | | 77 | 0.927 | 9.977) 9
8 | 0.062 | 0.772 43 | 0.277 | 3.189 78 | 0.958 | 10.292 is
9 | 0.065 | 0.806 ae 44 | 0.288 | 3.306 Be 79 | 0.990 | 10.616 ar
10 | 0.068 | 0.841) ||, || 45 | 0.299 | 3.426 | | || 80 | 1.023 | 10.949) a
11 | 0.072 | 0.878 | ae 46 } 0.311 | 3.550 ae 81 ] 1.057 | 11.291 ee
12 | 0.075 | 0.916 - 47 | 0.323 | 3.679 a 82 | 1.092 | 11.643
.18 | 0.078 | 0.957 | (7, || 48 | 0.335 | 3.611 | (°°) as | 1.128 | 12.005) 0
14 | 0.082 | 0.999 | ae 49 | 0.348 | 3.948 ae S4 | 1.165 | 12.376 fam
15 | 0.086 | 1.013 || 50 | 0.361 | 4.089 | | || 85 | 1.203 | 12.756 eee
16 | 0.090 | 1.090 | 51 | 0.374 | 4.234 86 | 1.242 | 13.146
17 | 0.094 | 1.138 | 49 | 52 | 0.888 | 4.383 | °°"? || 87 | 1.282 | 13.546} °°4°°
ig | 0.098} 1.190 | °°! || 53 | 0.403 | 4.537 | °°! |] 88 | 1.823 | 13.957) O4!
19 | 0.103 | 1.243) 0° || 54 | 0.418 | 4.696] O17 || 89 | 1.366 | 14.378 | Ot
20 | 0.108 | 1.298 55 | 0.433 | 4.860 90 | 1.410 | 14.810
21 | 0.113 | 1.355 | ae 56 | 0.449 | 5.028 | °°? || 91 | 1.455 | 15.254] °°449
eaodis |) 1.415 | °° || 67.1 0.466 | 6.202'| ©": || ‘92 | 1.501 | 15.709) °°?
Peeon2s) 1476 |\0 || 168° |) 0.489 | 6.381 | ° || 93 F.1.548 | 16.176 | OA"
24 | 0.129 | 1.540 ah 59 | 0.500 | 5.566 a 94 | 1.597 | 16.654 ees
25 | 0.135 | 1.606 60 | 0.518 | 5.756 . 95 | 1.647 | 17.145
Pema. | 1.671) O° i; 61 (0.537 | 5.952 | °'°° || 96 | 1.698 | 17.618 | 7°08
27 | 0.147 | 1.745 ee 62 | 0.556 ) 6.154 ae 97 | 1.751 | 18.164 ae
28 | 0.153 | 1.817 | a 63 | 0.576 | 6.361 ue 98 | 1.805 | 18.693 aa
29 | 0.160 | 1.892 | oo77 || St | 9-596 | 6-575 | oo 99 | 1.861 | 19.235 ees
30 | 0.167 | 1.969 | 0.077 || 03 | 9-617 | 6.795 | |... || 100 | 1.918 | 19.790 nie
31 | 0.174 | 2.046 | ee 66 | 0.639 | 7.021 Fete 101 | 1.977 | 20.357 wie
32 | 0.181 | 2.126 || 67 | 0.662 | 7.253 oy 102 | 2.037 | 20.938 nee
83 | 0.188 | 2.208 | | nea || 08 | 9-685 | 7-493 | 97. || 103 | 2.099 | 21.535 cou
SH 10.196) | 2.292.) ~ 69 | 0.708 | 7.739 | 104 | 2.162 | 22.146)
0.204 | 2.379 70 | 0.733 | 7.992 | °°??? || 105 | 2.227 | 22.771 | 076?
s —l}

Yo

133

PR AS Ce CONSE Veta sane,

ENGLISH MEASURES,

BASED ON THE HYGROMETRICAL CONSTANTS ADOPTED IN THE
GREENWICH OBSERVATIONS.

97

TABLE
OF

THE ELASTIC FORCES OF AQUEOUS VAPOR,

UNDER A PRESSURE OF 30 INCHES, EXPRESSED IN ENGLISH INCHES OF MERCURY FOR
TEMPERATURES OF FAHRENHEIT, ADOPTED IN THE GREENWICH OBSERVATIONS.

Tuis table contains the values of the elastic force of vapor for temperatures from
0° to 90° Fahrenheit, derived from Dalton’s experiments by Biot’s formula, by
Anderson, and published in Edinburgh Encyclopadia, Art. Hygrometry. It is re-
published, without the last decimal, in the volumes of the Greenwich Magnetic and
Meteorological Observations, and on it are based the various hygrometrical tables
published by Mr. Glaisher, either in the Greenwich volumes, or separately, most of
which will be found below, Tables XII. to XVII.

Since Dalton published his experiments, numerous attempts have been made by
various skilful physicists to determine with greater accuracy the elastic force of
vapor. Dr. Ure in England, Regnault in France, and Magnus in Germany, deserve

‘in this respect a special notice.

The last two experimenters having arrived simultaneously at results nearly iden-
tical, and their experiments having been conducted with all the care that modern
science requires, and the means that it can secure, their determinations seem to com-
mand an especial confidence, and to deserve the preference over all others. It is,
therefore, much to be regretted that the usefulness of the following otherwise so valu-
able tables, the formation of which involved so much labor, is in a measure impaired
by the fact that they were computed from elements which cannot be regarded as
the most reliable we now possess.

7
&
i-

alone

ae es apne

ee

137

Xol,

TABLE

OF TIIE

ELASTIC FORCE OF AQUEOUS VAPOR,

WNNER A BAROMETRIC PRESSURE OF 30 INCHES, EXPRESSED IN ENGLISH iNCHES OF

MERCURY FOR TEMPERATURES OF FAHRENHEIT.

From THE GREENWICH OBSERVATIONS.

Tenths of Degrees.

0. 1.
ca In. re In
0.061 0.061
0.064 | 0.064
0.066 | 0.066
0.069 0.069
0.071 0.072
0.074 0.074
0.077 0.077
0.050 0.080
0.083 | 0.083
0.086 | 0.086
0.089 | 0.090
0.093 | 0.093
0.096 0.097
0.100 | 0.100
0.104 | 0.104
0.108 | 0.108
0.112 0.112

0.116 | 0.116
0.120 | 0.121
| 0.125 | 0.125
0.129 | 0.130

i.

Eng. In
0.062

0.064
0.067
0.069
0.072
0.075

0.077
0.080
0.083

» 0.087

0.090

0.093
0.097
0.101
0.104
0.108

0.112
0.117
0.121
0.126
0.130

2.

oe

Eng. In.

0.062

0.064
0.067
0.069
0.072
0.075

0.078
0.081
0.084
0.087
0.090

0.094
0.097
0.101
0.105
0.109

0.113
0.117
0.121
0.126
0.131

4.

Eng. In.

0.062

0.065
0.067
0.070
0.072
0.075

0.078
0.081
0.084
0.087
0.091

0.094
0.098
0.101
0.105
0.109

0.113
0.118
0.122
0.126

0.372

3.

Eng. In.

0.062

0.065
0.067
0.070
0.073
0.075

0.078
0.081
0.084
0.088
0.091

0.094
0.098
0.102
0.106
0.110

0.114
0.118
0.122
0.127
0.132

Eng. In.

0.063

0.065
0.068
0.070
0.073
0.076

0.079
0.082
0.085
0.088
0.091

0.095
0.098
0.102
0.106
0.110

0.114
0.118
0.123
0.127
0.132

a. 8. | 9. |
Eng. In. | Eng. Tad Eng. In.
0.063 | 0.063 | 0.063
0.065 | 0.066 | 0.066
0.068 | 0.068 | 0.068 |
0.071 | 0.071 | 0.071 |
0.073 | 0.073 | 0.074
0.076 | 0.076 | 0.077
0.079 | 0.079 | 0.080
0.082 | 0.082 | 0.083
0.085 | 0.085 | 0.086
0.088 | 0.089 | 0.089
0.092 | 0.092 | 0.092
0.095 | 0.096 | 0.096
0.099 | 0.099 | 0.099
0.102 | 0.103 | 0.103
0.106 | 0.107 | 0.107
0.110 | 0.111 | 0.111
0.115 | 0.115 | 0.115 |
0.119 | 0.119 | 0.120
0.123 | 0.124 | 0.124 |
0.128 | 0.128 | 0.129
0.133 | 0.133 | 0.934 ||

8. 9.
DS eel

138 ELASTIC FORCE OF AQUEOUS VAPOR.

From the Greenwich Observations.

Temper- TeathLs foe || al
Be

Fabren- | oF

nett 0. 1. 2. 3. 4. | 5. 6. "7. 8. 9.

Eng. In, | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In.

|
°
21 || 0.134 | 0.135 | 0.135 | 0.136 | 0.136 | 0.137 | 0.157 | 0.138 | 0.138 | 0.139
2 || 0.189 | 0.140 | 0.140 | 0.141 | 0.141 | 0.142 | 0.142 | 0.143 | 0.148 | 0.144
3 || 0.144 | 0.245 | 0.145 | 0.146 | 0.146 | 0.147 | 0.147 | 0.148 | 0.148 | 0.149
24 || 0.150 | 0.150 | 0.151 | 0.152 | 0.152 | 0.152 | 0.153 | 0.153 | 0.154 | 0.155

25 0.155 | 0.156 | 0.156 | 0.157 0.157 f 0.158 | 0.158 | 0.159 | 0.160 | 0.160

26 0.161 | 0.161 | 0.162 | 0.163 | 0.163 | 0.164 | 0.165 | 0.165 | 0.166

27 0.167 | 0.167 | 0.168 | 0.168 | 0.169 }
28 Os | O.173 | O74 ON7s Ono
29 0.179 | 0.180 | 0.180 | 0.181 | 0.182 §

30 || 0.186 | 0.186 | 0.187 | 0.188 | 0.188 |

0.170 | 0.171 | 0.172 | 0.172
0.177 | 0.177 | 0.178 | 9.178

0.183 | 0.184 | 0.184 | 0.185
0.190 | 0.190 | 0.191 | 0-192

31 0.192 | 0.193 | 0.194 | 0.194 | 0.195 | 0.197 | 0.197 | 0.198 | 0.198
32 0.199 | 0.200 | 0.201 | 0.201 | 0.202 |
33. || 0.207 | 0.207 | 0.208 | 0.209 | 0.210 }
34 || 0.214 | 0.215 | 0.216 | 0.216 | 0:217 |
35 03222) | 05223) 4}, 0223) 1203224 00225 20.2

0.204 | 0.204 | 0.205 | 0.206
0.211 | 0.212 | 0.213 , 0.213
0.219 | 0.219 | 0.220 | 0.221
0.227 | 0.227 | 0.228 | 0.229

30 | 0.231 | 0.231 | 0.232) | 0.233

36 0.2 0.235 | 0.235 | 0.236 | 0.237
37 0.238 | 0.239 | 0.240 | 0.240 | 0.241 | 0.243 | 0.244 | 0.245 | 0.246
38 0.246 | 0.247 | 0.248 | 0.249 | 0.250 | 0.252 | 0.253 | 0.253 | 0.254
39 0.255 | 0.256 | 0.257 | 0.258 | 0.259 | 0.261 | 0.262 | 0.263 | 0.263
40 0.264 | 0.265 | 0.266 | 0.267 | 0.268 | 0.270 | 0.271 | 0.272 | 0.273

41 0.274 | 0.275.) 0.276 | 0.277 | 0.278 [| 0.280 | 0.281 | 0.282 | 0 282

42 0.283 | 0.284 | 0.285 | 0.286 | 0.287 | 0.289 | 0.290 | 0.291 | 0.292 ;
43 0.293 | 0.295 | 0.296 | 0.297 | 0.298 | 0.300 | 0.301 | 0.302 | 0.308

44 0.304 | 0.305 | 0.306 | 0.307 | 0-308 } 0.310 | 0.311 | 0.312 | 0.313
0.321 | 0.322 | 0.323 | 0.324

45 0.315 | 0.316 | 0.317 | 0.318 | 0.319 {|

0.332 | 0.333 | 0.335 | 0.336
0.344 | 0.345 | 0.346 | 0.348
0.356 | 0.357 | 0.358 | 0.360
0.368 | 0.370 | 0.371 | 0.372
0.381 | 0.382 | 0.383

46 0.326 | 0.327 | 0.328 | 0.329 | 0.330 §
47 0.337 | 0.338 | 0.339 | 0.340 | 0.342 §
48 0.349 | 0.350 | 0.351 | 0.352 | 0.354
49 0.361 | 0.362 | 0.363 | 0.365 | 0.366
| 50 0.373 | 0.375 | 0.376 | 0.377 | 0.379

51 0.386 | 0.388 | 0.389 | 0.390 | 0.392 0.394 | 0.396 | 0.397
52 0.400 | 0.401 | 0.402 | 0.404 | 0.405 0.408 | 0.409 | 0.411
53 0.414 | 0.415 | 0.416 | 0.418 | 0.419 0.422 | 0.423 | 0.425
54 0.428 | 0.429 | 0.431 | 0.432 | 0.434 0.437 | 0.438 | 0.440
53 0.442 | 0.444 | 0.445 | 0.447 | 0.449 0.452 | 0.453 | 0.455

6. 7 8.

0. 1. Ds oe 4.

ELASTIC FORCE OF AQUEOUS VAPOR. 139

From the Greenwich Observations.

, Tenths of Degrees.

emper-
ature |
Fahren-

pele il. Os | 1. 2. 3. 4. 5. 6. 7. 8.

- 9 || Eng. In, | Eng. In. | Eng. In. | Eng. In. | Eng. In. } Eng. In. | Eng. In. | Eng. In. | Eng. In.
56 || 0.458 0.459 0.461 0.462 0.464 § 0.465 0.467 | 0.469 | 0.470

7 0.473 | 0.475 | 0.476 | 0.478 | 0.480 | 0.481 | 0.483 | 0.485 | 0.486 | 0.488

58 0.489 0.491 0.493 0.494 0.496 | 0.498 0.499 | 0.501 0.503 0.504

| 0.509 0.511 0.513 ¢ 0.515 | 0.516 | 0.518 | 0.520 0.521

60 0.523 0.525 0.527 0.528 0.530 | 0.532 0.584 | 0.536 | 0.537 0.539

oO
©
=
ou
So
a
S
a
S
wa

61 0.541 | 0.543 | 0.544 | 0.546 | 0.548 | 0.550 | 0.552 | 0.554 | 0.555 | 0.557
62 0.559 | 0.561 | 0.563 | 0.565 | 0.567 | 0.568 | 0.570 | 0.572 | 0.574 | 0.576
63 0.578 | 0.580 | 0.582 | 0.584 | 0.586 | 0.588 | 0.590 | 0.591 | 0.593 | 0.595 -
64 0.597 | 0.599 | 0.601 | 0.603 | 0.605 | 0.607 | 0.609 | 0.611 | 0.613 | 0.615
0.617 | 0.619 | 0.621 | 0.623 | 0.626 | 0.628 | 0.630 | 0.632 | 0.634 | 0.636

67 0.659 | 0.661 | 0.664 | 0.666 | 0.668 | 0.670 | 0.672 | 0.674 | 0.677 | 0.679
63 0.681 | 0.684 | 0.686 | 0.688 | 0.690 | 0.692 | 0.695 | 0.697 | 0.699 | 0.701
69 0.704 | 0.706 | 0.708 | 0.711 | 0.713 | 0.715 | 0.717 | 0.720 | 0.722 | 0.725
70 0.727 | 0.729 | 0.732 | 0.734 | 0.736 | 0.739 | 0.741 | 0.744 | 0.746 | 0.748

S
or

71 0.751 | 0.753 | 0.756 | 0.758 | 0.761 | 0.763 | 0.766 | 0.768 | 0.771 | 0.773
72 0.776 | 0.778 | 0.781 | 0.783 | 0.785 | 0.787 | 0.790 | 0.792 | 0.795 | 0.797
73 0.801 | 0.803 | 0.806 | 0.809 | 0.811 | 0.814 | 0.817 | 0.819 | 0.822 | 0.824
7A 0.827 | 0.830 | 0.832 | 0.835 | 0.838 # 0.840 | 0.843 | 0.846 | 0.849 | 0.851
7d 0.854 | 0.857 | 0.860 | 0.862 | 0.865 | 0.868 | 0.871 | 0.873 | 0.876 | 0.879

76 0.882 | 0.885 | 0.887 | 0.890 | 0.893 | 0.896 | 0.899 | 0.902 | 0.905 | 0908
77 0.910 | 0.913 | 0.916 | 0.919 | 0.922 | 0.925 | 0.928 | 0.931 | 0.934 | 0.937
78 0.940 | 0.943 | 0.946 | 0.949 | 0.952 | 0.955 | 0.958 | 0.961 | 0.964 | 0.967
79 0.970 | 0.973 | 0.976 | 0.979 | 0.983 | 0.986 | 0.989 | 0.992 | 0.995 | 0.998
1.001 | 1.005 | 1.008 | 1.011 | 1.014 } 1.017 | 1.021 | 1.024 | 1.027 | 1.030

81 1.034 | 1.037 | 1.040 | 1.043 | 1.047 | 1.050 | 1.053 | 1.057 | 1.060.| 1.063
82 1.067 | 1.069 | 1.073 | 1.077 | 1.080 | 1.083 | 1.087 | 1.090 | 1.094 | 1.097
33 1.101 1.104 | 1.108 | 1.111 1.114 J 1.118 |} 1.121 | 1.125 | 1.129 | 1.132
84 1.136 | 1.139 | 1.143 1.146 | 1.150 | 1.153 | 1.157 | 1.160 | 1.164 | 1.167
85 1.171 1.175 | 1.178 | 1.182 1.186 | 1.190 | 1.193 | 1.197 | 1.201 | 1.205

86 1.209 | 1.212 | 1.216 1.220 | 1.224 | 1.228 | 1.232 | 1.235 | 1.239 | 1.243
1.247 | 1.251 1.255 1.258 | 1.262 | 1.266 | 1.270 | 1.274 | 1.278 | 1.282
88 1.286 | 1.290 | 1.294 | 1.298 | 1.302 | 1.306 | 1.310 | 1.314 | 1.318 | 1.322
1.326 | 1.330 | 1.335 | 1.339 | 1.343 | 1.347 | 1.351 | 1.355 | 1.359 | 1.364
90 1.368 1.372 | 1.376 1.3581 1.385 | 1.389 | 1.393 | 1.397 | 1.402 | 1.406

oO
So

ao ow
© ~

|
66 || 0.638 | 0.640 | 0.642 | 0.644 | 0.646 | 0.648 | 0.651 | 0.653 | 0.655 | 0.657

1. 2, alt 8: Rt Aine: | %. | 6. oe

J]
,

103

140

XCEL:

PSYCHROMETRICAL TABLE,

GIVING THE TEMPERATURE OF THE DEW-POINT, THE FORCE AND THE WEIGHT OF
VAPOR IN THE ATMOSPHERE, AND ITS RELATIVE HUMIDITY, DEDUCED FROM THE
INDICATIONS OF THE PSYCHROMETER, OR DRY AND WET BULB THERMOMETERS.

By James GLAISHER.

Tuis elaborate table, first published in London, in 1847, in pamphlet form, by J.
Glaisher, of the Royal Observatory at Greenwich, is based on the tables of elastic
forces of vapor deduced from Dalton’s experiments, and given above, Table XI.

The weight of a cubic foot of dry air at 32° Fahrenheit, and under the barometric
pressure of 30 inches, which has been adopted by Glaisher, and from which the
weight of vapor in a cubic foot of air is derived, is the mean of the determinations
obtained by Shuckburgh and by Biot and Arago, which is 563.2154 grains Troy;
563 being the number actually used in the calculations. See Preface to the Table,
p. 13, and also the Greenwich Meteorological Observations for 1842, p. xlvi.

The coefficient of the expansion of air which has been employed is that deter-
mined by the experiments of Gay-Lussac, according to which the air expands 0.00375
of its bulk for 1° Centigrade, or z$y for 1° Fahrenheit.

All these values, as may be seen by comparing Tables VI. and XI. of the elastic
forces, and also page 92, materially differ from those more recently determined with
great care by Regnault, and on which are based the Psychrometrical Tables given
above, page 50 et seq. This will account for the no inconsiderable differences often
found between the results in the two tables derived from the same data. A few
examples, taken from various parts of the tables, may be given here, in order to
enable the meteorologist to judge of the amount of the discrepancies which may occur
in the results when computed from different hygrometrical constants.

1. Suppose the temperature of the air indicated by the dry thermome-

ter to be ——s Oe ene
The temperature of evaporation indicated by the wet thermometer =a ete
Difference Loe

Then, Glaisher’s table gives,
The Force of Vapor = 0.065 inch.
The Relative Humidity = 0.730
Guyot’s table gives,
The Force of Vapor = 0.054 inch.
The Relative Humidity = 0.791
B 104

PSYCHROMETRICAL TABLE. 14}

2. By observation we have,
Dry Thermometer Owe
Wet Thermometer = 40° F.

Difference — 10° F.
Then, by Glaisher’s table, we find,

Force of Vapor = 0.186 inch.
Relative Humidity === 0.495

And by Guyot’s table, we find,
Force of Vapor = Osh laeaneh:
Relative Humidity = 0.322

3. The reading of the
Dry Thermometer is = 90° F.
Wet Thermometer is = 70° F.

Difference = 20° F.
By Glaisher’s table we have,

Force of Vapor ==" OL520 Incl.
Relative Humidity = 0.381

And by Guyot’s table,
Force of Vapor = 0.464 inch.
Relative Humidity = 0.329

The temperatures of the Dew-Point, given in Glaisher’s tables, have been com-
puted by means of the empirical factors given below, page 140, and in the manner
there described. See Preface to the Table, page 11.

ARRANGEMENT OF THE TABLE.

In the first two columns, at the left, are found the indications, in degrees of Fah-
renheit, of the dry and wet bulb thermometers. In the following columns, in their
order, and opposite to each of the temperatures of the wet thermometer, are given
the temperature of the dew-point; the force of vapor, in English inches ; the weight
of vapor, in grains, contained in a cubic foot of air; the amount of the same required
for saturation ; and the relative humidity in thousandths, corresponding to the differ-
ence of temperature between the two thermometers. The second half of the page,
at the right, furnishes, in seven columns, the weight, in grains, of a cubic foot of air,
under various barometric pressures from 28 to 31 inches, and in the different hygro-
metric conditions indicated by the differences of the two thermometers. These
numbers have been computed in the manner described below, page 142.

The range of the table extends from 10° to 90° of the dry thermometer, or of
the temperature of the air. From 10° to 34° Fahrenheit the results are calculated
for every second, third, and fifth of a degree of the wet thermometer, and for ex-
treme differences of the temperature of evaporation ranging from 2° to 5° below the
temperature of the air. From 34° to 90° the results are given only for every full
deg’ ce of the wet thermometer, and for extreme differences gradually increasing

B 105

142 PSYCHROMETRICAL TABLE.

from 5° to 27°. This range falls short of the wants of the extreme climate of North
America, where temperatures above 90° and far below 10° are of usual occurrence
over a great portion of the continent. The same may be said of the range of the
differences between the two thermometers in the first part of the table. The double
interpolation for the fractions of degrees of both thermometers being rather too large
to be neglected, its application becomes inconyenient.

UseE oF THE TABLE.

Enter the table with the observed temperatures of the dry and wet bulb thermom-
eters. On the same line as the last, and in their appropriate columns, the results
deduced from these data will be found.

Example.

The observation has given,
Temperature of the air by the dry thermometer ——G0eube
Temperature of evaporation by the wet-bulb thermometer = 53° F.

Page 129, find in the first column, headed Reading of the Dry Thermometer, the
temperature of 62°, and in the second, that of the wet, 53°. On the line beginning
with 53° are found, in their respective columns, the results deduced from these

data, viz. : —
The temperature of the Dew-point = AGT debs
The force of vapor in the air = 0.333 inch.
The weight of vapor in a cubic foot of air = 3.72 grains.
The amount of vapor required for saturation = 2.53 grains.
The relative humidity in thousandths = 0.595

B 106

XII. PSYCHROMETRICAL TABLES. 143

Weight

Force |__0f Vapor _ na Weight in Grains of a Cubic Foot of Air. St |
= Reqd. | midity,

Vapor | Ina} for | Satura- Height of the Barcmater ia English Inches.
in Cubic | Sat’n. | tion —

English| Foot of/ofaCu-| 7 gq
Inches.| Air. |bic Ft. Dn. n. in. |i] in | im :
of Air. 28.0 28.5 29.0 29.5 30.0 30.5 31.0

| ES fa ee ee ee

0. 089
0.084
0.079
0.074
0.069

0.087
0.082
0.077
0.072
0.067

0.090
0.085
0.080
0.075
0.070
0.066
0.061

0.100
0.094
0.088
0.083
0.077
0.073
0.068
0.064

0.104
0.097
0.091
8.9 | 0.086
7.2 | 0.080
5.5 | 0.075
3.8 | 0.071
2.1 | 0.066

15.0 | 0.108
13.3 | 0.101
11.6 | 0.095
9.9 | 0.089
8.2 | 0.083
6.5 | 0.078
4.8 | 0.073

gr.
1.11

1.05
0.98
0.92
0.86
0.81

1.15
1.08
1.02
0.96
0.90
0.84
0.78

1.19

gr
0.00
0.06
0.13
0.19
0.25
0.30

0.00
0.07
0.13
0.19
0.25
0.31
0.37

0.00
0.07
0.14
0.20
0.26
0.32
0.38
0.43

0.00
0.08
0.16
0.22
0.27
0.33
0.40
0.45

0.00
0.08
0.16
0.22
0.28
0.35
0.41
0.46

0.00
0.08
0.16
0.22
0.28
0.35
0.42
0.47

1.000
0.946
0.883
0.829
0.775

0.939
0.887
0.835
0.783
0.731

0.942
0.883
0.832
0.782
0.731
0.681
0.639

1.000
0.936
0.871
0.823
0.783
0.734
0.678
0.637

1.000
0.938
0.875
0.828
0.782
0.727
0.650
0.641

1.000
0.940
0.879
0.833
0.788
0.735
0.682

gr.
550.1
550.2
550.2
550.2
550.3
550.3

548.9
548.9
549.0
549.0
549.0
549.1
549.1

547.7
547.7
547.8
547.8
547.8
547.9
547.9
547.9

546.5
546.5
546.6
546.7
546.7
546.7
546.8
546.8

545.3
545.3
545.4
545.4
545.4
545.5
545.5
545.6

544.0
544.0
544.1
544.1
544.2
544.2
544.2

107

gr.
560.0
560.1
560.1
560.1
560.2
560.3

558.7
558.7
558.8
558.8
558.8
558.9
558.9

557.5
557.5
557.6
557.6
557.6
557.7
557.7
557.7

556.3
556.3
556.4
556.5
556.5
556.5
556.6
556.6

555.0
555.0
555.1
555.1
555.1
555.2
555.2
555.3

553.8
553.8
553.9
553.9
554.0
554.0
554.0

gr.
569.8

569.9
569.9
569.9
570.0
570.0

568.5
568.5
568.6
568.6
568.6
568.7
568.7

567.2
567.2
567.3
567.3
567.3
567.4
567.4
567.4

566.0
566.0
566.1
566.2
566.2
566.2
566.3
566.3

564.7
564.7
564.8
564.8
564.8
564.9
564.9
565.0

563.5
563.5
563.6
563.6
563.7
563.7
563.7
563.8

gr.
579.6

579.7
579.7
579.7
579.8
579.8

578.3
578.3
578.4
578.4
578.4
578.6
578.6

577.0
577.0
577.1
577.1
577.1
577.2
577.2
577.2

575.8
575.8
575.9
576.0
576.0
576.0
576.1
576.1

574.4
574.4
574.5
574.5
574.5
574.6
574.6
574.7

573.2
573.2
573.3
573.3
573.4
573.4
573.4
573.5

gr.

589.4

589.5
589.5
589.5
589.6
589.6

588.1
588.1
588.2
588.2
588.2
588.3
588.3

586.8
586.8
586.9
586.9
586.9
587.0
587.0
587.0

585.5
585.5
585.6
585.7
585.7
585.7
585.8
585.8

584.2
584.2
584.3
584.3
584.3
584.4
584.4
584.5

582.9
582.9
583.0
583.0
583.1
583.1
583.1

583.2

gr.
599.2

599.3
599.3
599.3
599.4
599.4

597.9
597.9
598.0
598.0
598.0
595.1
598.1

596.6
596.6
596.7
596.7
596.7
596.8
596.8
596.8

595.3
595.3
595.4
595.5
595.5
595.5
595.6
595.6

594.0
594.0
594.1
594.1
594.1
594.2
594.2
594.2

592.6
592.6
592.7
592.7
592.8
592.8
592.8
592.9

gr.
609.0
609.1
609.1
609.1
609.2
609.3

607.7
607.7
607.8:
607.8
607.8
607.9
607.9

606.4
606.4
606.5
606.5
606.5
606.6
606.6
606.6

605.0
605.0
605.1
605.2
605.2
605.2
605.3
605.3

603.7
603.7
603.8
603.8
603.8
603.9
603.9
603.9

602.3
602.3
602.4
602.4
602.5
602.5
602.5

602.6
eee)

144

PSYCHROMETRICAL TABLES.

Reading

of Ther- || Temp
mometer, of of
Fahr. Dew- be 2
’ | English

Inches.

15.3 | 0.109
13.6 | 0.102
11.9 | 0.096
10.2 | 0.090
8.5 | 0.084
6.8 | 0.079
5.1 | 0.074

16.3 | 0.113
14.6 | 0.106
12.9 | 0.099
11.2 | 0.093
9.5 | 0.088
7.8 | 0.082
6.1 | 0.077

19.0 | 0.125
17.3 | 0.117
15.6 | 0.110
13.9 | 0.103
12.2 | 0.097
10.5 | 0.091

8.8 | 0.085

7.1 | 0.080

20.0 | 0.129
18.3 | 0.121
16.6 | 0.114
14.9 | 0.107
13.2 | 0.101
11.5 | 0.094
9.8 | 0.089
8.1 | 0.083
6.4

Weight
of Vapor

i" Weight in Grains of a Cubic Foot of Air.
u-

Reqd.
Ina for
Cubic | Sat’n.
Foot of ofaCu- a ‘ : F A f
Air. |bic Ft. in. in. in. in, in. in. in.
of Air. 28.0 28.5) 29.0) 29.5| 30.0) 30.5) 31.0
gr. gr gr. gr. gr. gr. gr. gr. gr.
1.37 | 0.00 | 1.000 | 542.8 | 552.5 | 562. 571. 581.6 | 591.3 | 601.0

1.29 | 0.08 | 0.942 | 542.9 | 552.6 | 562.3 | 572.0 | 581.7 | 591.4 | 601.1
1.21 | 0.16 | 0.883 | 542.9 | 552.6 | 562.3 | 572.0 | 581.7 | 591.4 | 601.1
1.14 | 0.23 | 0.832 | 543.0 | 552.7 | 562.4 | 572.1 | 581.8 | 591.5 | 601.2
1.07 | 0.30 | 0.781 | 543.0 | 552.7 | 562.4 | 572.1 | 581.8 | 591.5 | 601.2
1.00 | 0.37 | 0.730 | 543.0 | 552.7 | 562.4 | 572.1 | 581.8 | 591.5 | 601.2

midit;
Batuie: Height of the Barometer in English Inches.
tion =

1.000.

0.94 | 0.43 | 0.686 | 543.1 | 552.8 | 562.5 | 572.1 | 581.9 | 591.6 | 601.3
0.88 | 0.49 | 0.643 | 548.1 | 552.8 | 562.5 | 572.1 | 581.9 | 591.6 | 601.3

1.41 | 0.00
1.33 | 0.08
1.25 | 0.16
1.17 | 0.24
1.10 | 0.31
1.03 | 0.38
0.97 | 0.44
0.91 | 0.50

1.000 | 541.3 | 551.0 | 560.8 | 570.5 | 580.1 | 589.8 | 599.4
0.943 | 541.3 | 551.0 | 560.8 | 570.5 | 580.1 | 589.8 | 599.4
0.887 | 541.4 | 551.1 | 560.9 | 570.6 | 580.2 | 589.9 | 599.5
0.830 | 541.4 | 551.1 | 560.9 | 570.6 | 580.2 | 589.9 | 599.5
0.780 | 541.5 | 551.2 | 561.0 | 570.7 | 580.3 | 590.0 | 599.6
0.730 | 541.5 | 551.2 | 561.0 | 570.7 | 580.3 | 590.0 | 599.6
0.688 | 541.5 | 551.2 | 561.0 | 570.7 | 580.3 | 590.0 | 599.6
0.646 | 541.6 | 551.3 | 561.1 | 570.8 | 580.4 | 590.1 | 599.7

1.47 | 0.00 | 1.000 | 540.5 | 550.2 | 559.8 | 569.5 | 579.1 | 588.8 | 598.4
1.38 | 0.09 | 0.939 | 540.5 | 550.2 | 559.8 | 569.5 | 579.1 | 588.8 | 598.4
1.29 | 0.18 | 0.878 | 540.6 | 550.3 | 559.9 | 569.6 | 579.2 | 588.9 | 598.5
1.21 | 0.26 | 0.824 | 540.6 | 550.3 | 559.9 | 569.6 | 579.2 | 588.9 | 598.5
1.14 | 0.33 | 0.776 | 540.7 | 550.4 | 560.0 | 569.7 | 579.3 | 589.0 | 598.6
1.07 | 0.40 | 0.728 | 540.7 | 550.4 | 560.0 | 569.7 | 579.3 | 589.0 | 598.6
1.01 | 0.46 | 0.688 | 540.7 | 550.5 | 560.1 | 569.8 | 579.3 | 589.0 | 598.6
0.95 | 0.52 | 0.647 | 540.8 | 550.6 | 560.2 | 569.9 | 579.4 | 589.1 | 598.7

1.52 | 0.00 | 1.000 | 539.3 | 548.9 | 558.5 | 568.2 | 577.8 | 587.5 | 597.1
1.43 | 0.09 | 0.941 | 539.3 | 548.9 | 558.5 | 568.2 | 577.8 | 587.5 | 597.1
1.34 | 0.18 | 0.882 | 539.4 | 549.0 | 558.6 | 568.3 | 577.9 | 587.6 | 597.2
1.26 | 0.26 | 0.829 | 539.4 | 549.0 | 558.6 | 568.3 | 577.9 | 587.6 | 597.2
1.18 | 0.34 | 0.776 | 539.5 | 549.1 | 558.7 | 568.4 | 578.0 | 587.7 | 597.3
1.11 | 0.41 | 0.730 | 539.5 | 549.1 | 558.7 | 568.4 | 578.0 | 587.7 | 597.3
1.04 | 0.48 | 0.684 | 539.6 | 549.2 | 558.8 | 568.5 | 578.1 | 587.8 | 597.4
0.98 | 0.54 | 0.645 | 539.6 | 549.2 | 558.8 | 568.5 | 578.1 | 587.8 | 597.4

1.58 | 0.00 | 1.000 | 538.1 | 547.7 | 557.3 | 566.9 | 576.5 | 586.1 | 595.7
1.48 | 0.10 | 0.937 | 538.2 | 547.8 | 557.4 | 567.0 | 576.6 | 586.2 | 595.8
1.38 | 0.20 | 0.874 | 538.3 | 547.9 | 557.5 | 567.1 | 576.7 | 586.3 | 595.9
1.30 | 0.28 | 0.823 | 538.3 | 547.9 | 557.5 | 567.1 | 576.7 | 586.3 | 595.9
1.23 | 0.35 | 0.779 | 538.3 | 547.9 | 557.5 | 567.1 | 576.7 | 586.3 | 595.9
1.15 | 0.43 | 0.728 | 538.4 | 548.0 | 557.6 | 567.2 | 576.8 | 586.4 | 596.0
1.08 | 0.50 | 0.684 | 538.4 | 548.0 | 557.6 | 567.2 | 576.8 | 586.4 | 596.0
1.01 | 0.57 | 0.639 | 538.5 | 548.1 | 557.7 | 567.3 | 576.9 | 586.5 | 596.1
0.95 | 0.63 538.5 | 548.1 | 557.7 | 567.3 | 576.9 | 586.5 | 596.1

108

Reading
of Ther-

mometer,

Fahr.

20.4
20.2

23

23.0
22.8
22.6
22.4
22.2

Point,
Fahr.

Oo
21.0
19.3
17.6
15.9

14.2
12.5
10.8
oa
7.4

22.0
20.3
18.6
16.9
15.2

13.5
11.8
10.1
8.4
6.7

23.0
21.3
19.6
17.9
16.2

in
English

Inches

in.
0.134
0.126
0.118
0.111

0.104
0.098
0.092
0.086
0.081

0.139
0.131
0.123
0.115
0.108

0.102
0.096
0.090
0.084
0.079

0.144
0.136
0.127
0.120
0.112

PSYCHROMETRICAL TABLES.

Weight
of Vapor

Ina

Cubic |
Foot of

of|SeAd sa) Dic

gr.
1.6

1.53
1.44
1.36

1.28
1.20
1.12
1.05
0.99

1.69
1°59
1.49
1.40
1.31

1.23
1.16
1.09
1.02
0.96

1.75
1.65
1.55
1.45
1.36

of Air.

gr
0.00
0.10
0.19
0.27

0.35
0.43
0.51
0.58
0.64

0.00
0.10
0.20
0.29
0.38

0.46
0.53
0.60
0.67
0.73

0.00
0.10
0.20
0.30
0.39

midity,
Satura-
tion =
of aCu-

ie Ft. 1.000.

1.000
0.939
0.884
0.835

0.785
0.736
0.687
0.644
0.607

1.000

0.941

0.882
0.828
0.775

0.728
0.686
0.645
0.604
0.568

1.000
0.943
0.886
0.829
0.777

Weight in Grains of a Cubic Foot of Air.

145

in.
28.0

gr.

537.0
537.0
537.1
537.1

537.2
537.2
537.3
537.3
537.3

535.7
535.8
535.8
535.9
535.9

536.0
536.0
536.1
536.1
536.1

534.6
534.6
534.7
534.7
534.8

Height of the Barometer in English Inches.

—

in. in.
28.5/ 29.0

gr.
546.6
546.6
5416.7
546.7

gr.
556.1

556.1
556.2
556.2

5416.8
546.8
546.9
546.9
546.9

556.3
556.3
556.4
556.4
556.4

545.3
545.4
545.4
545.5
545.5

554.9

545.6
545.6 | 555.2
545.7 | 555.3
545.7
545.7 | 555.3

544.2
544.2
544.3
544.3
544.4

553.7
553.7
553.8
553.8
553.9

in. in.
29.5 390.0

gr.
565.7
565.7
565.8
565.8

gr.
575.3

575.3
575.4
575.4

565.9
565.9
566.0
566.0
566.0

575.5
575.5
575.6
575.6
575.6

564.5
564.6
564.6
564.7
564.7

574.0
574.1
574.1
574.2
574.2

564.8
564.8
564.9
564.9
564.9

574.3
574.3
574.4
574.4
574.4

563.3
563.3
563.4
563.4
563.5

572.8
972.8
572.9
572.9
573.0

in. | in. |
| 30.5/| 31.0

gr.
584.9

| 584.9
535.0
585.0

gr.
594.5

594.5
594.6
594.6

585.1
585.1
585.2
585.2
585.2

594.7
594.7
594.8
594.8
594.8

583.6
583.7
583.7
583.8
583.8

593.1
593.2
593.2
593.3
593.3

583.9
583.9
584.0
584.0
584.0

593.4
593.4
593.5
593.5 ||
593.5

582.4
582.4
582.5
582.5
582.6

591.9
591.9
592.0
592.0
592.1

22.0
21.8
21.6
21.4
21.2

14.5
12.8
11.1
9.4
bod

0.106
0.099
0.093
0.087
0.082

1.28
1.21
1.13
1.06
1.00

0.47
0.54
0.62
0.69
0.75

0.731
0.691
0.646
0.606
0.571

534.8
534.9
534.9
535.0
535.0

544.4
544.5
544.5
544.6
544.6

553.9
554.0
554.0
554.1
554.1

563.5
563.6
565.6
563.7
563.7

573.0
573.1
573.1
573.2
573.2

582.6
582.7
582.7
582.8
582.8

592.1
592.2
592.2
592.3
592.3

24.0
23.8
23.6
23.4

24.0
22.3
21.1
19.6
18.2

0.150
0.142
0.135
0.127
0.121

1.81
1.72
1.63
1.55
1.46

1.000
0.951
0.901
0.856
0.807

533.4
533.5
533.5
533.6
533.6 |

590.6
590.7
590.7
590.8
590.8

542.9
543.0
543.1
543.2
543.2

552.4
952.5
552.5
552.6
552.6

562.0
562.1
562.1
562.2
562.2

571.5
571.6
571.6
571.7
571.7

581.1
581.2
581.2
581.3
581.3

|

23.0
22.8
22.6
22.4
22.2

16.7
15.2
13.8
12.3
10.8

0.115
0.108
0.103
0.097
0.091

1.38
1.31
1.24
1.18
1.12

0.762
0.724
0.685
0.652
0.634

533.7
533.7
533.7
533.8
533.8

543.3
543.3
543.3
543.4
543.4

552.7
552.7
552.7
552.8
552.8

590.9
590.9
590.9
591.0 |'
591.0 |

562.3
562.3
562.3
562.4
562.4

571.8
571.8
571.8
571.9
571.9

581.4
581.4
581.4
581.5
581.5

|

—?

eee SS SSS SS

109

146

Reading
of ‘Ther-

mometer,
Fabr.

won

wm OS OI st

28.0
26.3

|| 24.6

22.9

| 21.2

19.4

| 17.7

16.0
14.3

| 12.6 | 0.098

PSYCHROMETRICAL TABLES.

Weight
Force of Vapor a
of Reqd.
Vapor | Ina | for

in! Cubic | Sat’n.
English Foot of of aCu-
Inches. | Air. | bie Ft.
jof Air.

in.
0.155
0.148
0.141
0.135
0.129

gr.
1.5

1.78
1.70
1.62
1.55

gr
0.00
0.09
0.17
0.25
0.32

0.123
0.117
0.112
0.107
0.102

0.49
0.46
0.53
0.59
0.65

1.48
1.41
1.34
1.28
1.22

0.161
0.154
0.147
0.141
0.135

1.93
1.85
1.78
1.70
1.62

0.00
0.08
0.15
0.23
0.31

0.129
0.123
0.118
0.112
0.108

0.38
0.45
0.52
0.58
0.64

1.55
1.48
1.41
1.35
1.29

0.167
0.156
0.146
0.137
0.128

2.00
1.88
1.76
1.64
1.53

0.00
0.12
0.24
0.36
0.47

0.119
0.112
0.104
0.098
0.091

1.43
1.34
1.26
1.17
1.09

0.57
0.66
0.74
0.83
0.91

0.173
0.163
0.153
0.144
0.135

2.07
1.95
1.84
1.73
1.62

0.00
0.12
0.23
0.34
0.45

0.126
0.119
0.112
0.105

1.52
1,42
1.34
1.26
118),

Hu-
midity,
Satura- |
tion =

1 000.

1.000
0.952
0.909
0.867
0.829

0.791
0.754
0.717
0.685
0.653

1.000
0.959
0.923
0.881
0.839

0.804
0.767
0.731
0.700
0.668

1.000
0.940
0.880
0.820
0.765

0.715
0.670
0.630
0.585
0.545

1.000
0.942
0.889
0.836
0.783

0.734
0.686
0.648
0.604

0.571

in.
28.0

gr.
532.

532.3
532.4
532.4
532.4

532.5
532.5
532.6
532.6
532.6

531.1
531.2
531.2
531.2
531.3

531.3
531.4
531.4
531.4
531.5

529.9
529.9
530.0
530.1
530.1

530.2
530.3
530.3
530.4
530.5

528.7
528.8
528.9
528.9
529.0

529.1
529.1
529.2
529.2

| 529.2

110

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

in.
28.5

gr.
541.8
541.8
541.9
541.9
541.9

542.0
542.0
542.1
542.1
542.1

540.6
540.7
540.7
540.7
540.8

540 8
540.9
540.9
540.9
541.0

539.4
539.4
539.5
539.6
539.6

539.7
539.8
539.8
539.9
540.0

538.1
538.2
538.3
538.3
538.4

538.5
538.5
538.6
538.6
538.6

in.
29.0

gr.
591.3
551.3
551.4
ot
4

551
551

551
551
551
551.6
551.6

5
3
6

550.0
550.1
550.1
550.1
550.2

550.2
550.3
550.3
550.3
550.4

548.9
548.9
549.0
549.1
549.1

549.2
519.3
549.3
549.4
549.5

547.6
547.7
547.8
547.8
547.9

548.0
548.0
548.1
548.1
548.1

in. in.
29.5 30.0

gr.
560.8

560.8
560.9
560.9
560.9

561.0
561.0
561.1
561.1
561.1

559.5
559.6
559.6
559.6
559.7

559.7
559.8
559.8
559.8
559.9

557.0
557.1
557.2
557.2
557.3

ou

or or
or or or or

Noh

o

gr.
570.3

570.3
570.4
570.4
570.4

570.5
570.5
570.6
570.6
570.6

569.0
569.1
569.1
569.1
569.2

569.2
569.3
569.3
569.3
569.4

567.8
567.8
567.9
568.0
568.0

568.1
568.2
568.2
568.3
568.3

566.5
566.6
566.7
566.7
566.8

566.9
566.9
567.0
567.0
567.0

gr.
579.8
579.8
579.9
579.9
579.9

580.0
580.0
580.1
580.1
580.1

578.5
578.6
578.6
578.6
578.7

578.7
578.8
578.8
578.8
578.9

577.3

577.4
577.5
577.6
577.6

577.7
577.8
577.8
577.9
577.9

575.9

576.0 | &

576.1
576.1
576.2

576.3
576.3
576.4
576.4

576.4

in. in.
30.5 31.0

gr.
559.3

589.3
589.4
589.4
559.4

589.5
589.5
589.6

589.6 |}

589.6

588.0
588.1
588.1
588.1
588.2

588.2
588.3
588.3
588.3
588.4

586.7
586.8
586.9
587.0
587.0

or or OV
mM nmD
a1 1 -)

ou
mn
wwnnw =

or
m
~!)

o
ao w

D
Noone

oO or or
@m
or or Or Or Or
apie is

or
oO

or
m
Or
oo

or or or
mom on
or or Or
susie ein

oo Ow

o
g
or
©

|
|

PSYCHROMETRICAL TABLES. 147

Weig :
Reading | F of Teor Weight in Grains of a Cubic Foot of Air.
of Ther- ||Temp wed —_______| H

u-
mometer, Reqd. | midity, amis = ee 5
Fahr. Dew- | Vapor | Ina for | gatura- Height of the Barometer in English Inches.
Point. in Cubic Sat’n. | ain
? . o ‘ =>
Fahr, | English Foot of ofaCu-) 4 Qyg, 4 = : i | E i | z
Inches. | Air. bie Ft. in. in. in. in. _| —in. in. | in.
of Air. 28.0 28.5 29.0 29.5 30.0) 30.3) —

a | | |) | | |

° in. gr. gr gr. gr. gr. gr. gr. gr. gr.
29.0 | 0.179 | 2.14 | 0.00 | 1.000 | 527.6 | 537.0 | 546 5 | 555.9 | 565.3 | 574.7 | 584.1
27.5 | 0.170 | 2.03 | 0.11 | 0.949 | 527.7 | 537.1 | 546.6 | 556.0 | 565.4 | 574.8 | 584.2
26.0 | 0.161 | 1.92 | 0.22 | 0.898 | 527.7 | 537.1 | 546.6 | 556.0 | 565.4 | 574.8 | 584.2
24.5 | 0.152 | 1.82 | 0.32 | 0.851 | 527.8 | 537.2 | 546.7 | 556.1 | 565.5 | 574.9 | 584.3
23.0 | 0.144 | 1.73 | 0.41 | 0.809 | 527.8 | 537.2 | 546.7 | 556.1 | 565.5 | 574.9 | 584.3

21.5 | 0.137 | 1.64 | 0.50 | 0.766 | 527.9 | 537.3 | 546.7 | 556.2 | 565.6 | 575.0 | 584.5
20.0 | 0.129 | 1.55 | 0.59 | 0.725 | 528.0 | 537.4 | 546.8 | 556.2 | 565.7 | 575.1 | 584.6
18.5 | 0.122 | 1.47 | 0.67 | 0.687 | 528.0 | 537.4 | 546.8 | 556.3 | 565.7 | 575.2 | 584.6
17.0 | 0.116 | 1.38 | 0.76 | 0.645 | 528.1 | 537.5 | 546.9 | 556.4 | 565.8 | 575.3 | 584.7
15.5 | 0.110 | 1.30 | 0.84 | 0.617 | 528.1 | 537.5 | 546.9 | 556.4 | 565.8 | 575.3 | 584.7

30.0 | 0.186 | 2.21 | 0.00 | 1.000 | 526.5 | 535.9 | 545.3 | 554.7 | 564.1 | 573.5 | 582.9
28.6 | 0.177 | 2.10 | 0.11 | 0.951 | 526.5 | 535.9 | 545.3 | 554.7 | 564.1 | 573.5 | 582.9
27.2 | 0.168 | 2.00 | 0.21 | 0.905 | 526.6 | 536.0 | 545.4 | 554.8 | 564.2 | 573.6 | 583.0
25.9 | 0.160 | 1.91 | 0.30 | 0.864 | 526.7 | 536.1 | 545.5 | 554.9 | 564.3 | 573.7 | 583.1
24.5 | 0.152 | 1.82 | 0.39 | 0.824 | 526.7 | 536.1 | 545.5 | 554.9 | 564.3 | 573.7 | 583.1

20.3 | 0.131 | 1.56 | 0.65 | 0.706 | 526.9 | 536.3 | 545.7 | 555.1 | 564.5 | 573.9 | 583.3
19.0 | 0.125 | 1.49 | 0.72 | 0.674 | 526.9 | 536.3 | 545.7 | 555.1 | 564.5 | 573.9 | 583.3
17.6 | 0.118 | 1.42 | 0.79 | 0.643 | 527.0 | 536.4 | 545.8 | 555.2 | 564.6 | 574.0 | 583.4

31.0 | 0.192 | 2.29 | 0.00 | 1.000 | 525.4 | 534.7 | 544.1 | 553.5 | 562.9 | 572.3 | 581.7
29.9 | 0.185 | 2.20 | 0.09 | 0.961 | 525.4 | 534.7 | 544.1 | 553.5 | 562.9 | 572.3 | 581.7
28.8 | 0.178 | 2.12 | 0.17 | 0.926 | 525.5 | 534.8 | 544.2 | 553.6 | 563.0 | 572.4 | 581.8
27.7 | 0.171 | 2.04 | 0.25 | 0.891 | 525.5 | 534.8 | 544.2 | 553.6 | 563.0 | 572.4 | 581.8 |
26.6 | 0.164 | 1.95 | 0.34 | 0.852 | 525.6 | 534.9 | 544.3 | 553.7 | 563.1 | 572.5 | 581.9

25.5 | 0.158 | 1.87 | 0.42 | 0.817 | 525.6 | 534.9 | 544.3 | 553.7 | 563.1 | 572.5 | 58
24.4 | 0.152 | 1.80 | 0.49 | 0.786 | 525.6 | 534.9 | 544.3 | 553.7 | 563.1 | 572.5 | 58
23.4 | 0.146 | 1.73 | 0.56 | 0.756 | 525.7 | 535.0 | 544.4 | 553.8 | 563.2 | 572.6 | 5

22.3 | 0.141 | 1.67 | 0.62 | 0.729 | 525.7 | 535.0 | 544.4 | 553.8 | 563.2 | 572.6 | 5
21.2 | 0.135 | 1.60 | 0.69 | 0.699 | 525.7 | 535.0 | 544.4 | 553.8 | 563.2 | 572.6 | 58

32.0 | 0.199 | 2.37 | 0.00 | 1.000 | 524.2 | 533.5 | 542.9 | 552.3 | 561.6 | 570.9 | 580.3
| 30.8 | 0.191 | 2.27 | 0.10 | 0.958 | 524.3 | 533.6 | 543.0 | 552.4 | 561.7 | 571.0 | 580.4
29.5 | 0.182 | 2.17 | 0.20 | 0.916 | 524.4 | 533.7 | 543.1 | 552.5 | 561.8 | 571.1 | 580.5
28.3 | 0.175 | 2.07 | 0.30 | 0.874 | 524.4 | 533.7 | 543.1 | 552.5 | 561.8 | 571.1 | 580.6

27.0 | 0.167 | 1.98 | 0.39 | 0.836 | 524.5 | 533.8 | 543.2 | 552.6 | 561.9 | 571.2 | 580.6

5 || 23.1 | 0.145 | 1.73 | 0.48 | 0.783 | 526.8 | 536.2 | 545.6 | 555.0 | 564.4 | 573.8 | 583.2
2 || 21.7 | 0.138 | 1.64 | 0.57 | 0.742 | 526.8 | 536.2 | 545.6 | 555.0 | 564.4] 573.8 | 583.2
25.8 | 0.160 | 1.90 | 0.47 | 0.802 | 524.5 | 533.8 | 548.2 | 552.6 | 561.9 | 571.2 | 580.6

32
30.0 |
29.6 || 24.6 | 0.153 | 1.82 | 0.55 | 0.768 | 524.6 | 533.9 | 543.3 | 552.7 | 562.0} 571.3 | 580.7 |
29.2 || 23.3 | 0.146 | 1.74 | 0.63 | 0.735 | 524.6 | 533.9 | 543.3 | 552.7 | 562.0 | 571.3 | 580.7 |

28.8 || 22.1 | 0.140 | 1.67 | 0.70 | 0.705 | 524.6 | 533.9 | 543.3 | 552.7 | 562.0] 571.3 580.7 |
28.4 || 20.8 | 0.133 | 1.60 | 0.77 | 0.675 | 524.7 | 534.0 | 543.4 | 552.8 | 562.1 | 571.4 580.8 |

— eeeRFHRHERFHREHEHRHERefR eeHeTueueanoo}...Oo—o"thReReTEL _mejejeTeeemumeeeje—OEOTewe”soe Se

B 111

148

Ling

‘Ther-

\

Reading

of

anometer,
Fabr.

Dry.

°
33

34

35

Wet.

Oo
33.0
32.5
32.0
31.5
31.0

30.5

30.0
29.5
29.0
28.5

34.0
33.5
33.0
32.5
32.0

31.5
31.0
30.5
30.0
29.5
29.0

34
33
32
31
30

29
28

Temp
of
Dew-

Point,
Fahr.

0
33.0
31.6
30.2
28.8
27.4

26.0
24.6
23.2
21.8
20.4

34.0
32.7
31.4
30.1
28.8

27.5
26.2
24.9
23.6
22.3
21.0

35.0
32.5
30.0
27.5
25.0

22.5
20.0
17.5

Force
of
Vapor

in
English
Inches.

in.
0.207
0.197
0.187
0.178
0.169

0.161
0.153
0.145
0.138
0.131

0.214
0.204
0.195
0.186
0.178

0.170
0.162
0.155
0.147
0.141
0.134

0.222
0.203
0.186
0.170
0.155

0.142
0.129
0.117

Ina
Cubic

Air.

gr.
2.45

2.33
Dee,
2.11
2.01

1.91
1.82
1.74
1.65
1.57

2.53
2.42
2.31
2.21
2.11

2.01
1.91
1.83
1.75
1.67
1.59

2.62
2.40
2.19
2.00
1.83

1.68
1.53
1.39

| Foot of

PSYCHROMETRICAL TABLES.

Weight
of Vapor

Reqd.
for
Sat’n.
of aCu-
|bic Ft.
of Air.

gr.
0.00
0.12
0.23
0.34
0.44

0.54
0.63
0.71
0.80
0.88

0.00
0.11
0.22
0.32
0.42

0.52
0.62
0.70
0.78
0.86
0.94

0.00
0.22
0.43
0.62
0.79

0.94
1.09
1.23

Hu-
mnidity,
Satura-
tion =

1.000.

1.000
0.951
0.906
0.862
0.821

0.780
0.743
0.711
0.674
0.641

1.000
0.957
0.913
0.874
0.834

0.795
0.755
0.724
0.692
0.660
0.629

1.000
0.916
0.836
0.764
0.698

0.641
0,584
0.531
0.485

1.000
0.915
0.838
0.764
0.698

0.642
0.583
0.535
0.487

gr.
523.0
523.1
523.2
523.3
523.3

523.4
523.4
523.5
523.5
523.6

521.9
522.0
522.0
522.1
522.1

522.2
522.3
522.3
522.4
522.4
522.5

520.8
520.9
521.0
521.1
521.2

521.3
521.3
521.4
521.5

in. in.
28.0 28.5

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

gr.
532.3
532.5
532.6
532.7
532.7

532.8
532.8
532.9
532.9
533.0

531.2
531.4
531.4
531.5
931.5

531.6
531.7
531.7
531.8
531.8
531.9

530.1
530.2
530.3
530.4
530.5

530.6
530.7
530.8
530.9

529.0
529.1
529.2
529.3
529.4

529.5
529.6
529.7
529.8

in.
29.0

gr.
541.7

541.8
541.9
542.0
542.0

542.1
542.1
542.2
542.2
542.3

540.6
540.7
540.7
540.8
540.8

540.9
541.0
541.0
541.1
541.1
541.2

539.4
539.5
539.6
539.7
539.8

539.9
540.0
540.1
540.2

538.3
538.4
538.5
538.6
538.7

538.8
538.9
539.0
539.1

in.
29.5

gr.
551.

551.2
551.3
551.4
551.4

551.5
551.5
551.6
551.6
551.7

549.9
550.0
550.0
550.1
550.1

550.2
550.3
550.3
550.4
550.4
550.5

548.7
548.8
548.9
549.0
549.1

549.2
549.3
549.4
549.5

547.5
547.6
547.7
547.8
547.9

548.0
548.1
548.2
548.3

in.
30.0

gr.
560.4
560.5
560.6
560.7
560.7

560.8
560.8
560.9
560.9
561.0

559.2
559.3
559.3
559.4
559.4

559.5
559.6
559.6
559.7
559.7
559.8

558.0
558.1
558.3
558.4
558.5

558.6
558.6
558.7
558.7

556.8
556.9
557.0
557.1
557.2

557.3
557.4
557.5
557.6

in.
30.5

gr.
569.7

569.8
569.9
570.0
570.0

570.1
570.1
570.2
570.2
570.3

568.5
568.6
568.6
568.7
568.7

568.8
568.9
568.9
569.0
569.0
569.1

567.3
567.4
567.5
567.6
567.7

567.8
567.9
568.0
568.1

566.1
566.2
566.3
566.4
566.5

566.6
566.7
566.8
566.9

577.8
577.9
577.9
578.0
578.0

578.1
578.2
578.2
578.3
578.3
578.4

own o
a1 3 +
noe es
ma whe

576.6
576.7
576.8
576.9
577.0

577.1
577.2
577.3
577.4

575.4 |
575.5 |
575.6 |!
575.7 |
575.8 |
575.9 |
576.0
576.1
576.2

PSYCHROMETRICAL TABLES. 149

Wei
Reading Hones of ves Weight in Grains of a Cubic Foot of Air.
of Ther Temp. = Hu-
ometer, 2 | Reqd. | midit
y atte. ; Dar Vapor | Ina | for Sain Height of the Barometer in English Inches.
Point in | Cubic | Sat’n. | tion —
Fahr. | English | Foot of ofaCu-] 7999, |. : y f
3 ches. | Air. |bic Ft.| ~~ in. in in. in in. in. in.
of Air. 28.0 28.5 29.0 29.5 30.0; 230.0 31.0
oO in er. gr gr. gr. gr. gr. gr. gr. gr.
37.0 | 0.238 | 2.80 | 0.00 | 1.000 | 518.6 | 527.8 | 537.1 | 546.3 | 555.6 | 564.8 | 574.1

34.5 | 0.218 | 2.56 | 0.24 | 0.914 | 518.7 | 527.9 | 537.2 | 546.4 | 555.7 | 564.9 | 574.2
32.0 | 0.199 | 2.35 | 0.45 | 0.839 | 518.8 | 528.0 | 537.3 | 546.5 | 555.8 | 565.0 | 574.3
29.5 | 0.182 | 2.14 | 0.66 | 0.764 | 518.9 | 528.1 | 537.4 | 546.6 | 555.9 | 565.1 | 574.4
27.0 | 0.167 | 1.96 | 0.84 ' 0.700 | 519.0 | 528.2 | 537.5 | 546.7 | 556.0 | 565.2 | 574.5

eae py

24.5 | 0.152 | 1.79 | 1-0? | 0.640 | 519.1 | 528.3 | 537.6 | 546.8 | 556.1 | 565.3 | 574.6
22.0 | 0.139 | 1.64 | 1.16 | 0.586 | 519.2 | 528.4 | 537.7 | 546.9 | 556.2 | 565.4 | 574.7
19.5 | 0.127 | 1.50 | 1.30 | 0.536 | 519.3 | 528.5 | 537.8 | 547.1 | 556.3 | 565.5 | 574.8
17.0 | 0.116 | 1.37 | 1.43 | 0.489 | 519.4 | 528.6 | 537.9 | 547.2 | 556.4 | 565.6 | 574.9

38.0 | 0.246 | 2.89 | 0.00 | 1.000 | 517.4 | 526.6 | 535.9 | 545.1 | 554.4 | 563.6 | 572.9
35.5 | 0.226 | 2.65 | 0.24 | 0.917 | 517.5 | 526.7 | 536.0 | 545.2 | 554.5 | 563.7 | 573.0
33.0 | 0.207 | 2.43 | 0.46 | 0.841 | 517.6 | 526.8 | 536.1 | 545.3 | 554.6 | 563.8 | 573.1
30.5 | 0.189 | 2.22 | 0.67 | 0.768 | 517.7 | 526.9 | 536.2 | 545.4 | 554.7 | 563.9 | 573.2
28.0 | 0.173 | 2.03 | 0.86 | 0.703 | 517.8 | 527.0 | 536.3 | 545.5 | 554.8 | 564.0 | 573.3

25.5 | 0.158 | 1.85 | 1.04 | 0.640 | 517.9 | 527.1 | 536.4 | 545.6 | 554.9 | 564.1 | 573.4
| 23.0 | 0.144 | 1.70 | 1.19 | 0.588 | 518.0 | 527.2 | 536.5 | 545.7 | 555.0 | 564.2 | 573.5
20.5 | 0.132 | 1.54 | 1.35 | 0.533 | 518.1 | 527.3 | 536.6 | 545.8 | 555.1 | 564.3 | 573.6

18.0 | 0.120 1.39 | 1.50 | 0.481 | 518.2 | 527.4 | 536.7 | 545.9 | 555.2 | 564.4 | 573.7

39.0 | 0.255 | 2.99 | 0.00 | 1.000 | 516.3 | 525.5 | 534.7 | 543.9 | 553.2 | 562.4 | 571.6
36.5 | 0.234 | 2.74 | 0.25 | 0.917 | 516.4 | 525.6 | 534.8 | 544.0 | 553.3 | 562.5 | 571.7
34.0 | 0.214 | 2.51 | 0.48 | 0.840 | 516.5 | 525.7 | 534.9 | 544.1 | 553.4 | 562.6 | 571.8
31.5 | 0.196 | 2.30 | 0.69 | 0.769 | 516.6 | 525.8 | 535.0 | 544.2 | 553.5 | 562.7 | 571.9
29.0 | 0.179 | 2.10 | 0.89 | 0.703 | 516.7 | 525.9 | 535.1 | 544.3 | 553.6 | 562.8 | 572.1

26.5 | 0.164 | 1.91 | 1.08 | 0.639 | 516.8 | 526.0 | 535.2 | 544.4 | 553.7 | 562.9 | 572.2
24.0 | 0.150 | 1.76 | 1.23 | 0.589 | 516.9 | 526.1 | 535.3 | 544.5 | 553.8 | 563.0 | 572.3
21.5 | 0.137 | 1.60 | 1.39 | 0.535 | 517.0 | 526.2 | 535.4 | 544.6 | 553.9 | 563.1 | 572.4
19.0 | 0.125 | 1.46 | 1.53 | 0.488 | 517.1 | 526.3 | 535.6 | 544.8 | 554.1 | 563.3 | 572.6
16.5 | 0.114 | 1.32 | 1.67 | 0.442 | 517.2 | 526.4 | 535.7 | 544.9 | 554.2 | 563.4 | 572.7

40.0 | 0.264 | 3.09 | 0.00 | 1.000 | 515.2 | 524.4 | 533.6 | 542.8 | 552.0| 561.2 | 570.4
37.8 | 0.245 | 2.86 | 0.23 | 0.926 | 515.3 | 524.5 | 533.7 | 542.9 | 552.1] 561.3 | 570.5
| 35.6 | 0.227 | 2.65 | 0.44 | 0.858 | 515.4 | 524.6 | 533.8 | 543.0 | 552.2 | 561.4 | 570.6
33.4 | 0.210 | 2.45 | 0.64 | 0.793 | 515.5 | 524.7 | 533.9 | 543.1 | 552.3 | 561.5 | 570.7
31.2 | 0.194 | 2.27 | 0.82 | 0.734 | 515.6 | 524.8 | 534.0 | 543.2 | 552.4 | 561.6 | 570.8

29.0 | 0.179 | 2.09 | 1.00 | 0.676 | 515.7 | 524.9 | 534.1 | 543.3 | 552.5 | 561.7 | 570.9 |

26.8 | 0.165 | 1.94 | 1.15 | 0.628 | 515.8 | 525.0 | 534.2 | 543.4 | 552.6 | 561.8 | 571.0

24.6 | 0.153 | 1.79 | 1.30 | 0.579 | 515.9 | 525.1 | 534.3 | 543.5 | 552.7 | 561.9 | 571.1 |

22.4 | 0.141 | 1.65 | 1.44 | 0.534 | 516.0 | 525.2 | 534.4 | 543.6 | 552.8 | 562.0 | 571.2 |
me
3

20.2 | 0.130 | 1.53 | 1.56 | 0.495 | 516.1 | 525.3 | 534.5 | 553.7 | 552.9 | 562.1 | 571.3
18.0 | 0.120 | 1.42 | 1.67 | 0.459 | 516.1 | 525.3 | 534.5 | 543.8 | 553.0 | 562.2 | 571.4

B ans

150

PSYCHROMETRICAL TABLES.

ae | Temp. Fores mo vee ny Weight in Grains of a Cubic Foot of Air. i.
mometer, | pearl Reqd. midity, 3 = 5 SS
Pane || ae Vapor | Ina | for | satura? Height of the Barometer in English Inches.
Point, | in Cubic | Sat’n | tion =
| ——— || Fahr. | English Foot of ofaCu- 1.000. . J iB ; z i |
litvechioat AG aun IRicunt: in. in. in. in. in. ae gen
mr Wet. || of Air. 28.0 28.5 29.0 29.5 $0.0 30.5 31.0 |
o| o ° in. gr gr. gr. gr. gr gr. gr. gr.
at 41 41.0 | 0.274 | 3.19 | 0.00 | 1.000 | 514.1 | 523.3 | 532.5 | 541.6 | 550.8 | 560.0 Bea! 2 |
40 | 38.8 | 0.253 | 2.96 | 0.23 | 0.928 | 514.2 | 523.4 | 532.6 | 541.7 | 550.9 | 560 1 | 569.3
39 || 36.6 | 0.235 | 2.74 | 0.45 | 0.859 | 514.3 | 523.5 | 532 7 | 541.8 | 551.0 | 560.2 | 569.4 |
38 34.4 | 0.217 | 2.54 | 0.65 | 0.796 | 514.4 | 523.6 | 532.8 | 541.9 | 551.1 | 560.3 | 569.5
37 32.2 | 0.201 | 2.35 | 0.84 | 0.737 | 514.5 | 523.7 | 532.9 | 542.0 | 551.2 | 560.4 | 569 6
36 30.0 | 0.186 | 2.16 | 1.03 | 0.677 514.6 523.8 | 533.0 | 542.1 | 551.3 | 560.5 | 569.7
35 27.8 | 0.172 | 2.01 | 1.18 | 0.630 | 514.7 | 523.9 | 533 1 | 542.2 | 551.4 | 560.6 | 569.8
34 25.6 | 0.158 | 1.85 | 1.34 | 0.580 | 514.8 | 524.0 | 533.2 | 542.3 | 551.5 | 560.7 | 569.9
33 23.4 | 0.146 | 1.71 | 1.48 | 0.536 | 514.9 | 524.1 | 533.3 | 542.4 | 551.6 | 560.8 | 570.0 |
$2 || 21.2 | 0.135 | 1.58 | 1.61 | 0.495 | 514.9 | 524.1 | 533.3 | 542.5 | 551.7 | 560.9 sel
dl 19.0 | 0.125 | 1.46 | 1.73 | 0.458 | 515.0 | 524.2 | 533.4 | 542.6 | 551.8 | 561.0 | 570.2
42] 42 42.0 | 0.283 | 3.30 | 0.00 ; 1.000 | 513.0 | 522.2 | 531.3 | 540.5 | 549.6 | 558.8 | 567 9
41 39.8 | 0.263 | 3.06 | 0.24 | 0.927 | 513.1 | 522.3 | 531.4 | 540.6 | 549.7 | 558.9 | 568.0
40 | 37.6 | 0.243 | 2.83 | 0.47 | 0.858 | 513.2 , 522.4 | 531.5 | 540.7 | 5419.9 | 559.0 | 568.1
39 || 35.4 | 0.225 | 2.63 | 0.67 | 0.797 | 513.3 | 522.5 | 531.6 | 540.8 | 550.0 | 559.1 | 568.2
38 33.2 | 0.208 | 2.43 | 0.87 | 0.736 | 513.4 | 522.6 | 531.7 | 540.9 | 550.1 | 559.2 | 568.3
37 31.0 | 0.192 | 2.24 | 1.06 | 0.679 | 513.5 | 522.7 | 531.8 | 541.0 | 550.2 | 559.3 | 568.4
36 28.8 | 0.178 | 2.08 | 1.22 | 0.631 | 513.6 | 522.8 | 531.9 | 541.1 | 550.3 | 559.4 | 568.5
35 26.6 | 0.164 | 1.91 | 1.39 579 | 513.7 | 522.9 | 532.0 | 541.2 | 550.4 | 559.5 | 568.6
34 24.4 | 0.152 | 1.77 | 1.53 | 0.536 | 513.8 | 523.0 | 532.1 | 541.3 | 550.5 | 559.6 | 568.7
33 22.2 | 0.140 | 1.63 | 1.67 | 0.494 | 513.9 | 523.1 | 532.2 | 541.4 | 550.6 | 559.7 | 568.8
32 | 20.0 | 0.129 | 1.51 | 1.79 | 0.458 | 513.9 | 523.1 | 532.3 | 541.5 | 550.6 | 559.8 | 569.0
43} 43 || 43.0 | 0.293 | 3.41 | 0.00 | 1.000 | 511.8 | 520.9 | 530.1 | 539.3 | 548.4 | 557.5 | 566.7
42 || 40.8 | 0.272 | 3.16 | 0.25 | 0.927 | 511.9 | 521.0 | 530.2 | 539.4 | 548.6 | 557.7 | 566.9
41 38.6 | 0.252 | 2.93 | 0.18 | 0.859 | 512.0 | 521.1 | 530.3 | 539.5 | 548.7 | 557.8 | 567.0
40 36.4 | 0.233 | 2.71 | 0.70 | 0.795 | 512.1 | 521.2 | 530.4 | 539.6 | 548.8 | 557.9 | 567.1
39 34.2 | 0.216 | 2.51 | 0.90 | 0.736 | 512.2 | 521.3 | 530.5 | 539.7 | 548.9 | 558.0 | 567.2
38 32.0 | 0.199 | 2.32 | 1.09 | 0.680 | 512.3 | 521.4 | 530.7 | 539.8 | 549.0 | 558.1 | 567.3
37 29.8 | 0.184 | 2.15 | 1.26 | 0.630 | 512.4 | 521.5 | 530.8 | 539.9 | 549.1 | 558.2 | 567.4
36 27.6 | 0.170 | 1.98 | 1.43 | 0.581 | 512.5 | 521.6 | 530.9 | 540.0 | 549.2 | 558.3 | 567.5
35 25.4 | 0.157 | 1.82 | 1.59 | 0.534 | 512.6 | 521.7 | 531.0 | 540.1 | 549.3 | 558.4 | 567.6
34 23.2 | 0.145 | 1.69 | 1.72 | 0.495 | 512.7 | 521.8 | 531.1 | 540.2 | 549.4 | 558.5 | 567.7
| 83 || 21.0 | 0.134 | 1.56 | 1.85 | 0.458 | 512.9 | 522.0 | 531.2 | 540.3 | 549.5 | 558.6 | 567.8
|
44] 44 44.0 | 0.304 | 3.52.) 0.00 | 1.000 | 510.8 | 519.9 | 529.0 | 538.1 | 547.3 | 556.4 | 565.5
43 41.8 | 0.282 | 3.27 | 0.25 | 0.929 | 510.9 | 520.0 | 529.1 | 538.2 | 547.5 | 556.5 | 565.7
42 || 39.6 | 0.261 | 3.02 | 0.50 | 0.858 | 511.0 | 520.1 | 529.2 | 538.3 | 547.6 | 556.6 | 565.8
41 || 37.4 | 0.241 | 2.80 | 0.72 | 0.796 | 511.1 | 520.2 | 529.3 | 538.4 | 547.7 | 556.7 | 565.9
40 || 35.2 | 0.223 | 2.60 | 0.92 | 0.739 | 511.2 | 520.3 | 529.4 | 538.5 | 547.8 | 556.8 | 566.0
39 33.0 | 0.207 | 2.40 | 1.12 |.0.682 | 511.3 | 520.4 | 529.5 | 538.6 | 547.9 | 556.9 | 566.1
as 30.8 | 0.191 | 2.22 | 1.30 | 0.631 | 511.4 520.5 | 529.6 | 538.7 | 548.0 | 557.0 | 566.2 |
37 |! 28.6 | 0.177 | 2.05 | 1.47 | 0.582 | 511.5 | 520.6 | 529.7 | 538.8 | 548.1 | 557.1 | 566.3
36 26.4 | 0.163 | 1.89 | 1.63 | 0.537 | 511.6 | 520.7 | 529.8 | 538.9 | 548.2 | 557.2 | 566.4 |i
35 || 24.2 | 0.151.| 1.75 | 1.77 | 0.497 | 511.7 520.8 | 529.9 | 539.0 | 548.3 | 557.3 | 566.5
34 22. 0| yo: 139 | | 62 | 1.90 0.460 | 511.7 | 520.8 | 530.0 | 539.1 | 548.3 | 557.4 | 566.6
B iid

PSYCHROMETRICAL TABLES.

@

Temp.

Dew-

Eoin; English

Fahr.

45.0
42.9
40.8
38.7
36.6
34.5
30.
28.
! 26.
2A.

o— Nw

46.
43.
41.
|| 39.
37.
35.
Ba
31.
29.

27.

C= NW AaNwWoEO

—
W
ant n ce &

os
S lo
om WW eS OL

ood
— Ww Om
sc oO

8
7
39.6
d
4
3

Force
of
Vapor
in

Inches.

in.
0.315
0.292
0.272
0.253
0.235
0.218
0.202
188
174
-161
-150

coo°e

0.326
0.303
0.282
0.262
0.243
0.226
0.210
0.194
0.180
0.167
0.155

0.337
0.313
0.291
0.271
0.252
0.234
0.217
0.201
0.187
0.173
0.161

Weight

of Vapor

Reqd. sey,
Ina for | Satura-
Cubic Sat’n | tion =
rate. (Big Be fit

of Air.
gr gr.

3.64 | 0.00 | 1.000
3.39 | 0.25 | 0.931
3.14 | 0.50 | 0.863
2.92 | 0.72 | 0.802
2.70 | 0.94 | 0.742
2.52 | 1.12 | 0.692
2.34 | 1.30 | 0.643
2.16 | 1.48 | 0 593
2.01 | 1.63 | 0.552
1.87 | 1.77 | 0.514
Teen | oe Os 10)
3.76 | 0.00 | 1.000
3.50 | 0.26 | 0.931
3.25 | 0.51 | 0.864
3.02 | 0.74 | 0.803
2.80 | 0.96 | 0.745
2.61 | 1.15 | 0.694
2.42 | 1.34 | 0.643
2.24) | 152) 0-596
2.08 | 1.68 | 0.553
1.93 | 1.83 | 0.514
1.79 | 1.97 | 0.476
3.88 | 0.00 | 1.000
3.62 | 0.26 | 0.933
3.36 | 0.52 | 0.866
3.12 | 0.76 | 0.504
2.90 | 0.98 | 0.7417
2.70 | 1.18 | 0.696
Zee | leat O- Ora
2.32 | 1.56 | 0.598
Zaon | Medien Osan
2.00 | 1.88 | 0.515
1.85 | 2.03 | 0.477
4.01 | 0.00 | 1.000
3.73 | 0.28 | 0.930
3.47 | 0.54 | 0.865
3.23 | 0.78 | 0.805
3.00 | 1.01 | 0.748
2.79 | 1.22 | 0.696
2.60 | 1.41 | 0.648
2.40 | 1.61 | 0.598
2.24 | 1.77 | 0.558
2.07 | 1.94 | 0.516
1.92 | 2.09 | 0.479
1.77

—
cr
=

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

mae a AEDES 71s |

in. in. ! 1n. in. in. in. in.

28.0 28.5 29.0 29.5 30.0 30.5 31.0

gr. gr. gr. gr. er. gr. gr.

509.7 | 518.8 | 527.9 | 537.0 | 546.1 | 555.2 | 564.
509.8 | 518.9 | 528.0 | 537.1 | 546.3 | 555.3 | 564.5
509.9 | 519.0 | 528 1| 537.2 | 546.4 | 555.4 | 564.6
510.0 | 519.1 | 528.2 | 537.8 | 546.5 | 555.5 | 564.7 |
510.1 | 519.2 | 528.3 | 537.4 | 546.6 | 555.6 | 564.8
510.2 | 519.3 | 528.4 | 537.5 | 546.7 | 555.7 | 564.9
510.3 | 519.4 | 528 5 | 537.6 | 546.8 | 555.8 | 565.0
510.4 | 519.5 | 528.6 | 537.7 | 546.9 | 555.9 | 565.1
510.5 | 519.6 | 528.7 | 537.8 | 547.0 | 556.0 | 565.2
510.6 | 519.7 | 528.8 | 537.9 | 547.1 | 556.1 | 565.3
510.7 | 519.8 | 528.9 | 538.0 | 547.2 | 556.3 | 565.4
508.6 | 517.7 | 526.7 | 535.8 | 544.9 | 554.0 | 563.1
508.7 | 517.8 | 526.8 | 535.9 | 545.0 | 554.1 | 563.2
508.8 | 517.9 | 526.9 | 536.0 | 545.1 | 554.2 | 563.3 |
508.9 | 518.0 | 527.0 | 536.1 | 545.2 | 554.3 | 563.4
509.0 | 518.1 | 527.2 | 536.3 | 545.4 | 554.5 | 563.6
509.1 | 518.2 | 527.3 | 536.4 | 545.5 | 554.6 | 563.7
509.2 | 518.3 | 527.4 | 536.5 | 545.6 | 554.7 | 563.8
509.3 | 518.4 | 527.5 | 536.6 | 545.7 | 554.8 | 563.9
509.4 | 518.5 | 527.6 | 536.7 | 545.8 | 554.9 | 564.0
509.5 | 518.6 | 527.7 | 536.8 | 545.9 | 555.0 | 564.1
509.5 | 518.6 | 527.7 | 536.8 | 545.9 | 555.0 | 564.1 |
507.5 | 516.5 | 525.6 | 534.7 | 543.8 | 552.8 561.9 |
507.6 | 516.6 | 525.7 | 534.8 | 543.9 | 552.9 3620
507.8 | 516.7 | 525.9 | 535.0 | 544.1 | 553.1 | 562.2
507.9 | 516.8 | 526.0 | 535.1 | 544.2 | 553.2 | 562.3
508.0 | 516.9 | 526.1 | 535.2 | 544.3 | 553.3 | 562.4
508.1 | 517.0 | 526.2 | 535.3 | 544.4 | 553.4 | 562.5
508.2 | 517.1 | 526.3 | 535.4 | 544.5 | 553.5 | 562.6
508.3 | 517.2 | 526.4 | 535.5 | 514.6 | 553.6 | 562.7
508.4 | 517.3 | 526.5 | 535.6 | 544.7 | 553.7 | 562.8
508.5 | 517.4 | 526.6 | 535.7 | 544.8 | 553.8 | 562.9
508.5 | 517.6 | 526.7 | 535.8 | 544.9 | 554.0 | 563.1
506.4 | 515.4 | 524.5 | 533.5 | 542.6 | 551.6 560.7 |
506.5 | 515.5 | 524.6 | 533.7 | 542.8 | 551.8 | 560.9
506.6 | 515.6 | 524.7 | 533.8 | 542.9 | 551.9 | 561.0
506.7 | 515.7 | 524.8 | 533.9 | 543.0 | 552.0 | 561.1 |
506.8 | 515.8 | 524.9 | 534.0 | 543.1 | 552.1 | 561.2
506-9 | 515.9 | 525.0 | 584.1 | 543.2 | 552.2 | 561.3 ||
507.0 | 516.0 | 525.1 | 534.2 | 543.3 | 552.3 seical
507.1 | 516.1 | 525.2 | 534.4 | 543.5 | 552.5 | 561.5
507.2 | 516.2 | 525.3 | 534.5 | 543.5 | 552.5 | 561.6 |
507.3 | 516.3 | 525.4 | 534.6 | 543.6 | 552.6 | 561.6
507.4 | 516.4 | 525.5 | 534.7 | 543.6 | 552.7 | 561.7
516.4 | 525.6 | 534.7 552.8 561.8 |

507.4

ou

|

2.24 | 0.441

115

152

PSYCHROMETRICAL TABLES.

Reading nce ne Weight in Grains of a Cubic Foot of Air.
of Ther- ||Temp | Foree |°°"*P°F__| ary.
mometer, of _of Reqd. | midity, : z ;
Fahr. Dew- | Vapor | Ina/ for | gatura- Height of the Barometer in English Inches.
Points| etish|Foot of ofaCu-| SOS ce tise hla alee
Dig.| Wet [Tne aloe ate 28.0 28.5 29.0 29.5 30.0 30.5
oO O ° in. gr. gr gr. gr. gr. gr. gr. gr.
49 | 49 || 49.0 | 0.361 | 4.14 | 0.00 | 1.000 | 505.3 | 514.3 | 523.3 | 532.3 | 541.4) 550.4
48 || 46.9 | 0.336 | 3.85 | 0.29 | 0.930 | 505.4 | 514.4 | 523.4 | 532.4 | 541.5 | 550.5
47 || 44.8 | 0.312 | 3.59 | 0.55 | 0.867 | 505.6 | 514.6 | 523.6 | 532.6 | 541.7 | 550.7
46 || 42.7 | 0.290 | 3.34 | 0.80 | 0.807 | 505.7 | 514.7 | 523.7 | 532.7 | 541.8 | 550.8
{ 45 || 40.6 | 0.270 | 3.10 | 1.04 | 0.749 | 505.9 | 514.9 | 523.8 | 532.9 | 542.0 | 551.0
44 || 38.5 | 0.251 | 2.88 | 1.26 | 0.696 | 506.0 | 515.0 | 523.9 | 533.0 | 542.1} 551.1
43 || 36.4 | 0.233 | 2.68 | 1.46 | 0.647 | 506.1 | 515.1 | 524.0 | 533.1 | 542.2 | 551.2
42 || 34.3 | 0.216 | 2.49 | 1.65 | 0.601 | 506.2 | 515.2 | 524.1 | 533.2 | 542.3 | 551.3
41 || 32.2 | 0.201 | 2.32 | 1.82 | 0.560 | 506.3 | 515.3 | 524.2 | 533.3 | 542.4] 551.4
40 || 30.1 | 0.186 | 2.14 | 2.00 | 0.517 | 506.3 | 515.3 | 524.3 | 533.4 | 542.5 | 551.5
39 || 28.0 | 0.173 | 1.99 | 2.15 | 0.481 | 506.4 | 515.4 | 524.4 | 583.5 | 542.6 | 551.6
38 || 25.9 | 0.160 | 1.84 | 2.30 | 0.444 | 506.4 | 515.4 | 524.4 | 533.5 | 542.6 | 551.6
50 | 50 || 50.0 | 0.373 | 4.28 | 0.00 | 1.000 | 504.1 | 513.1 | 522.1 | 531.1 | 540.2 | 549.2
49 || 48.0 | 0.349 | 3.99 | 0.29 | 0.932 | 504.2 | 513.2 | 522.2 | 531.2 | 540.3 | 549.3
48 || 46.0 | 0.326 | 3.73 | 0.55 | 0.871 | 504.4 | 513.4 | 522.4 | 531.4 | 540.5 | 549.5
| 47 “|| 44.0 | 0.304 | 3.48 | 0.80 | 0.813 | 504.5 | 513.5 | 522.5 | 531.5 | 540.6 | 549.6
46 || 42.0 | 0.283 | 3.25 | 1.03 | 0.759 | 504.6 | 513.6 | 522.6 | 531.6 | 540.7 | 549.7
; 45 || 40.0 | 0.264 | 3.03 | 1.25 | 0.708 | 504.8 | 513.8 | 522.8 | 531.8 | 540.9 | 549.9
44 || 38.0 | 0.246 | 2.82 | 1.46 | 0.659 | 504.9 | 513.9 | 522.9 | 532.0 | 541.0} 550.0
43 || 36.0 | 0.230 | 2.63 | 1.65 | 0.614 | 505.1 | 514.1 | 523.1 | 532.1 | 541.2 | 550.2
42 || 34.0 | 0.214 | 2.45 | 1.83 | 0.572 | 505.2 | 514.2 | 523.2 | 532.2 | 541.3 | 550.3
41 || 32.0 | 0.199 | 2.28 | 2.00 | 0.533 | 505.3 | 514.3 | 523.3 | 532.3 | 541.4] 550.4
40 |) 30.0 | 0.186 | 2.12 | 2.16 | 0.495 | 505.4 | 514.4 | 523.4 | 532.4 | 541.5} 550.5
39 || 28.0 | 0.173 | 1.97 | 2.31 | 0.460 | 505.5 | 514.5 | 523.5 | 532.5 | 541.6 | 550.6
51 | 51 || 51.0 | 0.386 | 4.42 | 0.00 | 1.000 | 503.1 | 512.1 | 521.1 | 530.0 | 539.0] 548.0
50 || 49.0 | 0.361 | 4.12 | 0.30 | 0.932 | 503.2 | 512.2 | 521.2 | 530.1 | 539.1] 548.1
49 || 47.0 | 0.337 | 3.85 | 0.57 | 0.871 | 503.3 | 512.3 | 521.3 | 530.3 | 539.3 | 548.3
48 || 45.0 | 0.315 | 3.60 | 0.82 | 0.814 | 503.4 | 512.4 | 521.4 | 530.4 | 539.4 | 548.4
47 || 43.0 | 0.293 | 3.36 | 1.06 | 0.760 | 503.5 | 512.5 | 521.5 | 530.5 | 539.5 | 548.5
46 || 41.0 | 0.274 | 3.13 | 1.29 | 0.708 | 503.7 | 512.7 | 521.7 | 530.7 | 539.7 | 548.7
45 || 39.0 | 0.255 | 2.92 | 1.50 | 0.661 | 503.8 | 512.8 | 521.8 | 530.8 | 539.8 | 548.8
44 || 37.0 | 0.238 | 2.72 | 1.70 | 0.615 | 503.9 | 512.9 | 521.9 | 530.9 | 539.9 | 548.9
| 43 || 35.0 | 0.222 | 2.54 | 1.88 | 0.575 | 504.0 | 513.0 | 522.0 | 531.0 | 540.0 | 549.0
| 42 || 33.0 | 0.207 | 2.36 | 2.06 | 0.534 | 504.1 | 513.1 | 522.1 | 531.1 | 540.1 | 549.1
| 41 || 31.0 | 0.192 | 2.20 | 2.22 | 0.498 | 504.2 | 513.2 | 522.2 | 531.2 | 540.3 | 549.3
\ 40 || 29.0 | 0.179 | 2.05 | 2.37 | 0.464 | 504.3 | 513.3 | 522.3 | 531.3 | 540.4] 549.4
| 62 | 52 || 52.0 | 0.400 | 4-56 | 0.00 | 1.000 | 502.1 | 511.0 | 520.0 | 528.9 | 537.9 | 546.8
4 51 || 50.0 | 0.373 | 4.26 | 0.30 | 0.934 | 502.2 | 511.1 | 520.1 | 529.0 | 538.0] 546.9
50 || 48.0 | 0.349 | 3.98 | 0.58 | 0.873 | 502.4 | 511.3 | 520.3 | 529.2 | 538.2 | 547.1
; 49 |! 46.0 | 0.326 | 3.72 | 0.84 | 0.816 | 502.5 | 511.4 | 520.4 | 529.3 | 538.3 | 547.2
| 48 || 44.0 | 0.304 | 3.47 | 1.09 | 0.761 | 502.6 | 511.5 | 520.5 | 529.4 | 538.4 | 547.3
| 47 || 42.0 | 0.283 | 3.23 | 1.33 | 0.709 | 502.8 | 511.7 | 520.7 | 529.6 | 538.6 | 5417.5
| 46 | 40.0 | 0.264 | 3.02 | 1.54 | 0.662 | 502.9 | 511.8 | 520.8 | 529.7 | 538.7 | 547.6
45 || 38.0 | 0.246 | 2.81 | 1.75 | 0.616 | 502.9 | 511.9 | 520.9 | 529.8 | 538.8 | 547.8
| 44 || 36.0 | 0.230 | 2.63 | 1.93 | 0.577 | 503.1 | 512.0 | 521.0 | 529.9 | 539.0} 548.0
43 34.0 | 0.214 | 2.44 | 2.12 | 0.535 | 503.2 | 512.1 | 521.1 | 530.0 | 539.1 | 548.1
| 42 || 32.0 | 0.199 | 2.28 | 2.28 | 0.500 | 503.3 | 512.3 | 521.3 | 530.2 | 539.2 | 548.2
Al 30.0 | 0.186 | 2.13 | 2.43 | 0.467 | 503.4 | 512.4 | 521.4 | 530.3 | 539.3 | 548.3
B 116

in.
31.0

gr.

559.4
559.5
559.7
559.8
560.0
560.1
560.2
560.3
560.4
560.5
560.6
560.6
558.2
558.3
558.5
558.6
558.7
558.9
559.0
559.2
559.3
959.4
559.5
559.6
557.0
557.1
557.3
557.4
557.5
557.7
557.8
557.9
558.0

or or or on
or

DD
_

Or or or or

or or
or

or

or or
or or or or
PRAHXAADPHA wo

SCHENWND HE & ® & &

or or or ¢
or or
1 D>

557.1
557.2
557.3

em

Reading

of Ther-

mometer,
Fahr.

rs.

Wet.

PSYCHROMETRICAL TABLES.

in |
English |
Inches.

in.
0.414
0.386
0.361
0.337
0.315
0.293
0.274
0.255
0.238
0.222
0.207
0.192

0.428
0.400
0.373
0.349
0.326

0.304
0.283
0.264
0.246
0.230
0.214
0.199
0.186
0.173
0.161

0.442
0.418
0.394
0.372
0.351
0.331
0.312
0.295
0.278
0.262
0.246
0.232
0.219
0.206
0.194
0.182
0.172
0.161

Weight

Ina
Cubic
Foot of
Air.

gr.
4.71

4.40
4.11
3.84
3.58
3.34

3.12
2.91
2.71
2.53
2.35
2.18

4.86
4.54
4.25
3.96
3-70

3.45
3.23
3.01
2.80
2.61
2.43
2.27
2.10
1.96
1.82

5.02
4.74
4.46
4.23
3.98
3.76
3.55
3.34
3-14
2.97
2.79
2.64
2.A7
2.32
2.20

of Vapor

Reqd.
for
Sat’n.
of aCu-
bic Ft.
of Air.

gr.
0.0

0.31
0.60
0.87
1.13
1.37
1.59
1.80
2.00
2.18
2.36
2.53

0.00
0.32
0.61
0.90
1.16

1.41
1.63
1.85
2.06
eee
2.43
2-09
2.76
2.90
3.04

0.00
0.28
0.56
0.79
1.04
1.26

1.47
1.68
1.88
2.05
2.23
2.38
2.55

2.70
2.82

2.07
1.95
1.83

2.95
3.07
3.19

Hu-
midity,
Satura-
tion —

1.000.

1.000
0.934
0.873
0.815
0.760
0.709

0.662
0.618
0.575
0.537
0.499
0.463

1.000
0.934
0.875
0.815
0.761

0.709
0.665
0.619
0.576
0.537

0.500
0.467
0.432
0.403
0.375

1.000
0.944
0.888
0.843
0.793
0.749

0.707
0.665
0.626
0.591
0.556
0.526
0.492
0.462
0.438
0.412
0.388
0.365

Weight in Grains of a Cubic Foot of Air.

153

J

Height of the Barometer in English Inches.

in. in.
28.0/28.5

gr.
500.9
501.1
501.2
501.4
501.5
501.6

501.7
501.8
502.0
502.1
502.1
502.2

gr.
509.8

510.0
510.1
510.3
510.4
510.5

510.6
510.7
510.9
511.0
511.0
511.1

508.8
508.9
509.1
509.2
509.3

509.5
509.6
509.7
509.8
509.9

510.0
510.1
510.2
510.3
510.4

499.9
500.0
500.2
500.3
500.4

500.6
500.7
500.8
500.9
501.0

501.1
501.2
501.3
501.4
501.5

507.7
507.9
508.0
508.2
508.3
508.4

508.6
508.7
508.7
508.8
508.9
509.0

509.1
509.2
509.3
509.3
509.4
509.5

498.8
499.0
499.1
499.3
499.4
499.5

499.7
499.8
499.8
499.9
500.0
500.1

500.2
500.3
500.4
500.5
500.6
500.7

in.
29.0

gr.
518.8
519.0
pro
519.3
519.4
519.5

519 6
519.7
519.9
520.0
520.0
520.1

517.8
517.9
518.1
518.2
518.3

518.5
518.6
518.7
518.8
518.9

519.0
519.1
519.2
519.3
519.4

516.6
516.8
516.9
517.1
517.2
517.3

517.5
517.6
517.6
517.7
517.9
518.0

518.1
518.2
518.3
518.4
518.5
518.6

in. in.

29.5

gr.
527.7

527.9
528.0
528.2
528.3
528.4

528.5
528.6
528.8
528.9
528.9
529.0

526.7
526.8
527.0
527.1
527.2

527.4
527.5
527.6
527.7
527.8

527.9
528.0
528.1
528.2
528.3

525.5
525.7
525.8
526.0
526.1
526.2

526.3
526.5
526.6
526.7
526.8
526.9

527.0
527.1
527.1
527.2
527.3
527.4

39.0

gr.
536.7
536.9
537.0
937.2
537.3
537.4

537.5
537.6
537.8
537.9
538.0
538.1

535.6
535.7
535.9
536.0
536.1

536.3
536.4
536.5
536.7
536.8

536.9
537.0
537.1
537.2
537.3

534.4
534.6
534.7
534.9
535.0
535.1

535.3
535.4
535.5
535.6
535.7
535.8

535.9
536.0
536.0
536.1
536.2

536.2

in.

30.9

gr.
545.6

545 8
545.9
546.1
546.2
546.3

546.4
546.5
546.7
546.8
546.9
547.0

544.5
544.6
544.8
544.9
545.0

545.2
545.3
545.4
545.6
545.7

545.8
545.9
546.0
546.1
546.2

513.3
543.5
543.6
543.8
543.9
544.0
544.2
544.3
5444
544.5
544.6
544.7

544.8
544.9
544.9
545.0
545.1
545.1

gr.
554.6
554.8

oo
or Ou
Ov be

oS

|
ate

or or
or ou
or or

or or or
Or Or Or
OV Or or Ot

oo ¢
or or

o
ou
aS or
peri tie S Ac) Ma maura
oemnt oak Whe

SS ee

554.0

554.2
554.3
554.4
554.6
554.7

554.8

553.5
553-6
553.8
553.9

554.9
555.0
555.1
555.2 |'

or or
on

or
or or
www w wv
chee eie eats

Own k NS

or or
oo

117

154

PSYCHROMETRICAL TABLES.

Weight in Grains of a Cubic Foot of Air,

a=
| : It Weight
{ cence | manag Force SEN AROE Hu-
\| imometer, of of | Reqd. | midity,
Fahr. Dew- | Vapor | Ina | for | Satura-
Point in | Cubic : Sat’n. | tion =
Rakes} English Foot of ofaCu-| 1 0U0.
|| Dry.| Wet. Inches. | Air. lof Air
o oO ° in. gr. gr
56 | 56 || 56.0 | 0.458 | 5.18 | 0.00 | 1.000
55 54.3 | 0.432 | 4.89 | 0.29 | 0.944
54 52.6 | 0.408 | 4.61 | 0.57 | 0.890
53 50.9 | 0.385 | 4.37 | 0.81 | 0.844
2 1952002363) 2.11 1/07 | 02793
51 ATeONUOsot0| 9.04 | PST One?
50 45.8 | 0.323 | 3.66 | 1.52 | 0.706
49 || 44.1 | 0.305 | 3.45 | 1.73 | 0.666
48 42.4 | 0.287 | 3.25 | 1293)! 0.627
A7 40.7 | 0.271 | 3.07 | 2.11 | 0.593
46 || 39.0 | 0.255 | 2.89 | 2.29 | 0.558
45 || 37.3 | 0.240 | 2.73 | 2.45 | 0.527
44 || 35.6 | 0.227 | 2.56 | 2.62 | 0.494
43 || 33.9 | 0.213 | 2.41 | 2.77 | 0.465
42 | 32.2 | 0.201 | 2.27 | 2.91 | 0.438
41 || 30.5 | 0.189 | 2.14 | 3.04 | 0.413
40 || 28.8 | 0.178 | 2.01 | 3.17 | 0.388
39 27.1 | 0.167 | 1.89 | 3.29 | 0.365
|
57 | 57 57.0 | 0.473 | 5.384 | 0.00 | 1.000
56 55.3 | 0.447 | 5.05 | 0.29 | 0.946
55 53.6 | 0.422 | 4.76 | 0.58 | 0.891
54 51.9 | 0.398 | 4.50 | 0.84 | 0.843
53 50.2 | 0.3876 | 4.25 | 1.09 | 0.796
52 48.5 | 0.355 | 4.00 | 1.34 | 0.749
51 46.8 | 0.335 | 3.78 | 1.56 | 0.709
50 || 45.1 | 0.316 | 3.56 | 1.78 | 0.667
49 || 43.4 | 0.298 | 3.36 | 1.98 | 0.629
48 41.7 | 0.281 | 3.17 | 2.17 | 0.594
47 || 40.0 | 0.264 | 2.99 | 2.35 | 0.560
46 || 38.3 | 0.249 | 2.81 | 2.53 | 0.526
45 || 36.6 | 0.235 | 2.65 | 2.69 | 0.4196
Af || 34.9 | 0.221 | 2.50 | 2.84 | 0.468
43° || 33.2 | 0.208 | 2.35 | 2.99 | 0.440
42° 131.5 | 0.196] 2.21 | 3.13 | 0.414
41 29.8 | 0.184 | 2.08 | 3.26 | 0.390
40 || 28.1 | 0.173 | 1.96 | 3.38 | 0.367
|
(PAE
B

|
1
Height of the Barometer in English Inches. !
«Apr gag) ameaer 1a rR
in. in. in. in. in. in incall
28.0 28.5 29.0 29.5 30.0 30.5 31.0)
gr. gr. gr. gr. gr. gr. gr. |
497.7 | 506.6 | 515.5 | 524.4 | 533.2 | 542.1 | 551.0
497.9 | 506.8 | 515.7 | 524.6 | 533.4 | 542.3 | 551.2
498.0 | 506.9 | 515.8 | 524.7 | 533.5 | 542.4 | 551.3
498.2 | 507.1 | 516.0 | 524.9 | 533.7 | 542.6 | 551.5
498.3 | 507.2 | 516.1 | 525.0 | 533.8 | 542.7 | 551.6 |
498.4 | 507.3 | 516.2 | 525.1 | 533.9 | 542.8 | 551.7 |
498.6 | 507.5 | 516.4 | 525.3 | 534.1 | 543.0 | 551.9
498.6 | 507.5 | 516.4 | 525.3 | 534.2 | 543.1 | 552.0
498.7 | 507.6 | 516.5 | 525.4 | 534.3 | 543.2 | 552.1 |!
498.8 | 507.7 | 516 6 | 525.5 | 534.4 | 543.3 | 552.2
498.9 | 507.8 | 516.7 | 525.6 | 534.5 | 543.4 | 552.3 |
499.0 | 507.9 | 516.8 | 525.7 | 534.6 | 543.5 | 552.4
499.1 | 508.0 | 516.9 | 525.8 | 534.7 | 543.6 | 552.5 |
499.2 | 508.1 | 517.0 | 525.9 | 534.8 | 543.7 | 552.6
499.3 | 508.2 | 517.1 | 526.0 | 534.9 | 543.8 | 552.7
499.4 | 508.3 | 517.2 | 526.1 | 535.0 | 543.9 | 552.8
499.5 | 508.4 | 517.3 | 526.2 | 535.1 | 544.1 | 552.9
499.5 | 508.4 | 517.3 | 526.2 | 535.1 | 544.1 | 552.9
496.6 | 505.5 | 514.4 | 523.2 | 532.1 | 540.9 | 549.8
496.8 | 505.7 | 514.6 | 523.4 | 532.3 | 541.1 | 550.0 |
496.9 | 505.8 | 514.7 | 523.5 | 532.4] 541.2 | 550.1 |
497.1 | 506.0 | 514.9 | 523.7 | 532.6 | 541.4 | 550.3
497.2 | 506.1 | 515.0 | 523.8 | 532 541.5 | 550.4
497.3 | 506.2 | 515.1 | 523.9 | 532.8 | 541.6 | 550.5
497.5 | 506.4 | 515.3 | 524.1 | 533.0 | 541.8 | 550.7
497.6 | 506.5 | 515.4 | 524.2 | 533.1 | 541.9 | 550.8
497.7 | 506.6 | 515.5 | 524.3 | 533.2 | 512.0 | 550.9
497.8 | 506.7 | 515.6 | 524.4 | 533.3 | 542.1 | 551.0
497.9 | 506.8 | 515.7 | 524.5 | 533.4 | 542.2 | 551.2
498.0 | 506.9 | 515.8 | 524.6 | 533.5 | 542.3 | 551.3
498.1 | 507.0 | 515.9 | 524.7 | 533.6 | 542.4 | 551.4
498.2 | 507.1 | 516.0 | 524.8 | 533.7 | 542.5 | 551.5
498.3 | 507.2 | 516.1 | 524.9 | 533.8 | 542.6 | 551.6
498.3 | 507.2 | 516.1 | 524.9 | 533.8 | 542.6 | 551.6 |
498.4 | 507.3 | 516.2 | 525.1 | 533.9 | 542.7 | 551.7 |
498.5 | 507.4 | 516.3 | 525.2 | 534.0 | 542.8 | 551.8

118

of Ther-
mometer,

| Reading
Fahr.

O
j| 98
|

|

Dry | Wet.

Oo

58
57
56
5d

Temp
oO

Dew-

| Point,

Fahr.

58.0
56.3
54.6
52.9
51.2
49.5

47.8
46.1
44.4
42.7
41.0
39.35

37.6
35.9
34.2
32.5
30.8

|, 29.1

27.4

59.0
57.3
55.6
53.9
52.2
50.5

48.8
47.1
45.4
43.7
42.0
10.3
38.6

36.9
35.2
33.5
31.8
30.1
28.4
26.7

Force
of
Vapor
Ra
| English
Inches. |

in.
0.189
0.462
0.437
0.412
0.359

0.367

0.346
0.327
0.308
0.290
0.274
0.258

0.243
0.229
0.216
0.203
0.191
0.180
0.169

0.506
0.478
0.452

0.426

0.402
0.380

0.358
0.338
0.319
0.301
0.283
0.267
0.252

0.237
0.223
0.210
0.198
0.186
0.175
0.165

PSYCHROMETRICAL TABLES.

155

Weight
of Vapor

| Reqd.
Ina | for

Cubic Sat’n. | ;;
1G —
Foot of ofaCu-| 774

Air. |bie Ft.
‘of Air.

gr. gr
5.51 | 0.00
5.21 | 0.30
4.92 | 0.59
4.64 | 0.87
4.39 | 1.12
4.14 | 1.37

3.90 | 1.61
3.68 | 1.83
3.48 | 2.03
3.28 | 2.23
3.08 | 2.43
2.91 | 2.60

2.74 | 2.77
2.58 | 2.93
2.43 | 3.08
2.29 | 3.22
2.15 | 3.36
2.03 | 3.48
1.91 | 3.60

5.69 | 0.00
5.37 | 0.32
5.03 | 0.61
4.79 | 0.90
4.53 | 1.16
4.28 | 1.41

4.03
3.80
3.60
3.39
3.19
3.01
2.84

a

NNNNN SE =
DBaurnwnoeonosn
aoaoeosvse &

wr

2.67
2.51 | 3.18
2.37 | 3.32
2.23 | 3.46
2.09 | 3.60
1.97 | 3.72
1.85 | 3.84

Se
S
we

Hu-
midity,
Satura-

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

1 0U0.

1.000
0.944
0.893
0.842
0.796
0.752

0.708
0.668
0.633
0.596
0.561
0.529
0.499

0.469
0.441
0.417
0.392
0.367
0.346

0.325

in.
28.0

gr.
495.5

495.7 |
495.8
496.0
496.1
496.2

496.4
496.5
496.6
496.7
496.8
496.9

497.0
497.1
497.2
497.3
497.4
497.5
497.5

in.
28.5

gr.
504.3

504.5
504.6
504.8
504.9
505.0

505.2
505.3
505.4
505.5
505.6
505.7

505.8
505.9
505.0
506.1
506.2
506.3
506.3

119

in.
29.0

gr.
513.2
513.4
513.5
913.7
513.8
513.9

514.1
914.2
514.3
514.4
5014.5
514.6

514.7
514.8
514.9
515.1

515.2
515.3
515.3

512.2
512.3
512.4
512.5
512.6
512.8

513.0
513.1
513.2
513.4
513.4
513.5
513.6

515.7
513.8
513.9
514.1
514.2
514.3
514.3

in.
29.5

gr.
522.0
522.2
§22.3
522.5
522.7
522.8

523.0
523.1
523.2
523.3
523.4
523.5

523.6
523.7
523.8
523.9
524.1
524.2
524.2

521.0
521.1
521.2
521.3
521.4
521.6

521.8
521.9
522.0
522.2
522.3
522.4
522.5

or
no

bw ow be
ana

oro
tw pw

522.

523.0
523.1
523.1

in.
20.0)

gr
530.9
Dole
531.2
531.4
531.6
531.7

531.9
532.0
532.1
532.2
532.3
532.4

in

30.0

gr.
539.7

539.9
540.0
540.2
540.4
540.5

540.7
540.8
540.9
541.0
541.1
541.2

541.5
541.
541.
541.6
541.7
541.8
541.8

= oO

or

538.6
538.7
538.8
538.9
539.1
539.3

539.
539.
539:
539.
510.
540.
540.

cab S oO

nu = ©

540.5
540.
540.5
540.6
540.7
540.8

ee

540.8 |

48.9

156 PSYCHROMETRICAL TABLES.

fe | Weight Toa Wyo
Reading Je Weight in Grains of a Cubic Foot of Air.
of Ther Temp.| Force a CRAB ON Hu
mometer. Of rien OE Reqd. | miaity, | —————— j Shae
Fahr. Dew- | Vapor | Ina | for Sataine Height of the Barometer in English Inches.
Point in | Cubic | Sat?’n. | tion =
—— || Fahr’ | English Foot of ofaCu-| 7 099, ne lees , 3 : ; ;
D Inches. Air. |bic Ft. in. in. in. in. In. in. . !
ry.| Wet. of Air. 28.0 28.5 29.0 29.5 30.0 30.5 31.0

oc] o o in. gr gr. gr. gr. gr. gr.
60 | 60 60.0 | 0.523 | 5.87 | 0.00 | 1.000 | 493.4 | 502.2 | 511.0 | 519.8
59 58.3 | 0.494 | 5.54 | 0.33 | 0.944 | 493.6 | 502.4 | 511.2 | 520.0
58 56.6 | 0.467 | 5.24 | 0.63 | 0.893 | 493.7 | 502.5 | 511.3 | 520.1
57 54.9 | 0.441 | 4.95 | 0.92 | 0.843 | 493.8 | 502.6 | 511.4 | 520.2
56 53.2 | 0.416 | 4.68 | 1.19 | 0.797 | 494.0 | 502.8 | 511.6 | 520.4

gr. gr.
537.4 | 546.2 |
537 6 | 546.4
537.7 | 546.5
557.8 | 546.6
538.0 | 546.8

538.2 | 547.0
538.4 | 547.2
538.5 | 547.4
538.7 | 547.6
538.8 | 547.7

55 51.5 | 0.393 | 4.41 | 1.46 | 0.751 | 494.2 | 503.0 | 511.8 | 520.6
54 49.8 | 0.371 | 4.17 | 1.70 | 0.710 | 494.4 | 503.2 | 512 0 | 520.8
53 48.1 | 0.350 | 3.92 | 1.95 | 0.668 | 494.5 | 503.3 | 512.1 | 520.9
52 46.4 | 0.330 | 3.70 | 2.17 | 0.630 | 494.7 | 503.4 | 512.3 | 521.1
51 44.7 | 0.311 | 3.49 | 2.38 | 0.595 | 494.8 | 503.5 | 512.4 | 521.2

50 43.0 | 0.293 | 3.29 | 2.58 | 0.561 | 494.8 | 503.6 | 512.5 | 521.3 | 530.1 | 538.9 | 547.8
49 41.3 | 0.277 | 3.10 | 2.77 | 0.528 | 494.9 | 503.7 | 512.6 | 521.4 | 530.2 | 539.0 | 547.9
48 39.6 | 0.261 | 2.93 | 2.94 | 0.499 | 495.0 | 503.8 | 512.7 | 521.5 | 530.3 | 539.1 | 548.0

47 || 37.9 | 0.246 | 2.75 | 3.12 | 0.468 | 495.1 | 503.9 | 512.8 | 521.6 | 530.4 | 539.2 | 548.1
46 36.2 | 0.231 | 2.60 | 3.27 | 0.443 | 495.2 | 504.0 | 512.9 | 521.7 | 530.5 | 539.3 | 548.2

45 34.5 | 0.218 | 2.45 | 3.42 | 0.417 | 495.3 | 504.1 | 513.0 | 521.8 | 530.6 | 539.4 | 548.3
44 || 32.8 | 0.205 | 2.31 | 3.56 | 0.394 | 495.4 | 504.2 | 513.1 | 521.9 | 530.7 | 539.5 | 548.4

43 31.1 | 0.193 | 2.17 | 3.70 | 0.370 | 495.5 | 504.3 | 513.2 | 522.0 | 530.8 | 539.6 | 548.5
42 || 29.4 | 0.182 | 2.04 | 3.83 | 0.348 | 495.6 | 504.4 | 513.3 | 522.1 | 530.9 | 539.7 | 548.6

41 27.7 | 0.171 | 1.92 | 3.95 | 0.327 | 495.6 | 504.4 | 513.3 | 522.1 | 530.9 | 539.7 | 548.7

60 59.3 | 0.511 | 5.72 | 0.34 | 0.944 | 492.5 | 501.3 | 510.1 | 518.9 | 527.7 | 536.5 | 545.3
59 57.6 | 0.483 | 5.40 | 0.66 | 0.891 | 492.6 | 501.4 | 510.2 | 519.0 | 527.8 | 536.6 | 545.4
58 55.9 | 0.456 | 5.11 | 0.95 | 0.843 | 492.8 | 501.6 | 510.4 | 519.2 | 528.0 | 536.8 | 545.6
57 54.2 | 0.431 | 4.83 | 1.23 | 0.797 | 493.0 | 501.8 | 510.6 | 519.4 | 528.2 | 537.0 | 545.8

56 || 52.5) 0.407 | 4.55 | 1.51 | 0.751 | 493.1 | 501.9 | 510.7 | 519.5 | 528.3 | 537.1 | 545.9
a5 50.8 | 0.383 | 4.30 | 1.76 | 0.710 | 493.3 | 502.1 | 510.9 | 519.7 | 528.5 | 537.3 | 546.1
54 || 49.1 | 0.362 | 4.05 | 2.01 | 0.668 | 493.4 | 502.2 | 511.0 | 519.8 | 528.6 | 537.4 | 5416.2
53 47.4 | 0.342 | 3.83 | 2.23 | 0.632 | 493.5 | 502.3 | 511.1 | 519.9 | 528.7 | 537.5 | 546.3
52 45.7 | 0.322 | 3.61 | 2.45 | 0.596 | 493.6 | 502.4 | 511.2 | 520.0 | 528.8 | 537.6 | 546.4
51 || 44.0 | 0.304 | 3.40 | 2.66 | 0.561 | 493.8 | 502.6 | 511.4 | 520.2 | 529.0 | 537.8 | 546.6

0

50 | 42.3 | 0.286 | 3.21 | 2.85 | 0.530 | 493.9 | 502.7 | 511.5 | 520.3 | 529.1 | 537.9 | 516.7
49 || 40.6 | 0.270 | 3.02 | 3.04 | 0.498 | 194.0 | 502.8 | 511.6 | 520.4 | 529.2 | 538.0 | 546.8
48 38.9 | 0.254 | 2.85 | 3.21 | 0.470 | 494.1 | 502.9 | 511.7 | 520.5 | 529.3) 538.1 | 546.9
37.2 | 0.240 | 2.69 | 3.37 | 0.444 | 494.2 | 503.0 | 511.8 | 520.6 | 529.4 | 538.2 | 547.0

46 | 35.5 | 0.226 | 2.53 | 3.53 | 0.417 | 494.3 | 503.1 | 511.9 | 520.7 | 529.5 | 538.3 | 547.1
45 || 33.8 | 0.213 | 2 38 | 3.68 | 0.393 | 494.4 | 503.2 | 512.0 | 520.8 | 529.6 : 538.4 | 547.2
44 || 32.1 | 0.200 | 2 24 | 3.82 | 0.370 | 494.5 | 503.3 | 512.1 | 520.9 | 529.7 | 538.5 | 517.3
43 || 30.4] 0.188 | 2.11 | 3.95 | 0.348 | 494.6 | 503.4 | 512.2 | 521.0 | 529.8 | 538.6 | 547.4
42 || 28.7] 0.177 | 1.99 | 4.07 | 0.328 | 494.7 | 503.5 | 512.3 | 521.1 | 529.9 | 538.7 | 547.5
41 || 27.0 | (.167 | 1.87 | 4.19 | 0.309 | 494.7 | 503.5 | 512.3 | 521.1 | 529.9 | 538.7 | 547.5

t
|
|
61} 61 61.0 | 0.541 | 6.06 | 0.00 | 1.000 | 492.3 | 501.1 | 509.9 | 518.7 | 527.5 | 536.3 | 545.1

B 120

PSYCHROMETRICAL TABLES. Ve

Mwah oa a). ce oe

: Weight 2 ’ .
Reading of Vapor. Weight in Grains of a Cubic Foot of Air. {
!| of Ther- || Temp | Force Hu- \
| mometer, of of Begs nidity||<— sea
| Fabr, Dew- | Vapor | Ina | for | gatura- Height of the Barometer in English Inches.
Point in Cubic | Sat’n. | tion — el
Fahr, | English Foot of ofaCu-| 7.990, 4 ¥ : E : a , i
D inches Air. |bic Ft. ars ne in. In. in. in. in
ry-| Wet of Air. 28.0/28.5 29.0 29.5 30.0/30.5 31.0

|
° in. gr. gr. gr. gr. gr. gr. gr. gr. gr.

62 | 62 62.0 | 0.559 | 6.25 | 0.00 | 1.000 | 491.2 | 499.9 | 508.7 | 517.5 | 526.3 | 535.1 | 543.9 |!
61 60.3 | 0.528 | 5.91 | 0.34 | 0.946 | 491.4 | 500.1 | 508.9 | 517.7 | 526.5 | 535.3 | 544.1
60 58.6 | 0.499 | 5.58 | 0.67 | 0.893 | 491.5 | 500.2 | 509 0 | 517.8 | 526.6 | 535.4 | 544.2
59 56.9 | 0.472 | 5.27 | 0.98 | 0.843 | 491.7 | 500.4 | 509.2 | 518.0 | 526.8 | 535.6 | 544.4
58 55.2 | 0.445 | 4.99 | 1.26 | 0.798 | 191.9 | 500.6 | 509.4 | 518.2 | 527.0 | 535.8 | 544 6 ||

57 53.5 | 0.421 | 4.70 | 1.55 | 0.752 | 492.0 | 500.7 | 509.5 | 518.3 | 527.1 | 535.9 | 544.7 ||
56 51.8 | 0.397 | 4.44 | 1.81 | 0.710 | 492.1 | 500.7 | 509.5 | 518.4 | 527.3 | 536.1 | 544.9
55 50.1 | 0.375 | 4.19 | 2.06 | 0.670 | 492.2 | 500.9 | 509.7 | 518.5 | 527.4 | 536.2 | 545.0
54 48.4 | 0.354 | 3.95 | 2.30 | 0.632 | 492.4 | 501.1 | 509.9 | 518.7 | 527.6 | 536.4 | 545.2
53 46.7 | 0.333 | 3.72 | 2.53 | 0.595 | 492.5 | 501.3 | 510.1 | 518.9 | 527.7 | 536.5

52 45.0 | 0.315 | 3.52 | 2.73 | 0.563 | 492.7 | 501.5 | 510.3 | 519.1 | 527.9 | 536.7 | 545.5
51 43.3 | 0.297 | 3.31 | 2.94 | 0.530 | 492.8 | 501.6 | 510.4 | 519.2 | 528.0 | 536.8 | 545.6
50 41.6 | 0.280 | 3.13 | 3.12 | 0.501 | 492.9 | 501.7 | 510.5 | 519.3 | 528.1 | 536.9 | 545.7
49 39.9 | 0.263 | 2.95 | 3.30 | 0.472 | 493.0 | 501.8 | 510.6 | 519.4 | 528.2! 537.0 | 545.8
48 38.2 | 0.248 | 2.77 | 3.48 | 0.443 | 493.1 | 501.9 | 510.7 | 519.5 | 528.3 | 537.1 | 545.9
47 36.5 | 0.234 | 2.61 | 3.64 | 0.418 | 493.2 | 502.0 | 510.8 | 519.6 | 528.4 | 537.2 | 546.0

46 || 34.8 | 0.220 | 2.47 | 3.78 | 0.395 | 493.3 | 502.1 | 510.9 | 519.7 | 528.5 | 537.3 | 546.1 |.
45 33.1 | 0.207 | 2.32 | 3.93 | 0.371 | 493.3 | 502.1 | 511.0] 519.7 | 528.6 | 537.3 | 546.1 |
44 || 31.4 | 0.195 | 2.18 | 4.07 | 0.349 | 493.4 | 502.2 | 511.0 | 519.8 | 528.6 | 537.4 | 546.2 |
43 29.7 | 0.184 | 2.06 | 4.19 | 0.330 | 493.4 | 502.2 | 511.1 | 519.8 | 528.6 | 537.4 | 546.2 |
42 28.0 | 0.173 | 1.94 | 4.31 | 0.311 | 493.5 | 502.3 | 511.2 | 519.9 | 528.7 | 537.5 | 546.3 |'
41 26.3 | 0.163 | 1.83 | 4.42 | 0.293 | 493.6 | 502.4 | 511.3 | 520.0 | 528.8 | 537.6 | 546.4 |'

or
an
w

63 | 63 || 63.0 | 0.578 | 6.45 | 0.00 | 1.000 | 490.2 | 498.9 | 507.7 | 516.4 | 52 533.9 | 542.7

|
62 61.3 | 0.546 | 6.10 | 0.35 | 0.946 | 490.4 | 499.1 | 507.9 | 516.6 | 5
|

Or

2
25.4 | 534.1 | 542.9
61 59.6 | 0.516 | 5.76 | 0.69 | 0.893 | 490.5 | 499.2 | 508.0 | 516.7 | 525.5 | 534.2 | 513.0
60 57.9 | 0.488) 5.44 | 1.01 | 0.843 | 490.7 | 499.4 | 508.2 | 516.9 | 525.7 | 534.4 | 543.2
59 56.2 | 0.461 | 5.15 | 1.30 | 0.798 | 490.9 | 499.6 | 508.4 | 517.1 | 525.9 | 534.6 | 543.4

58 54.5 | 0.435 | 4.86 | 1.59 | 0.753 | 491.0 | 499.7 | 508.5 | 517.2 | 526.0 | 534.7 | 543.5 ||
57 52.8 | 0.411 | 4.59 | 1.86 | 0.712 | 491.1 | 499.8 | 508.6 | 517.3 | 526.2 | 534.9 | 543.7 |
56 51.1 | 0.388 | 4.33 | 2.12 | 0.671 | 491.2 | 499.9 | 508.7 | 517.4 | 526.3 | 535.0 | 543.8

55 49.4 | 0.366 | 4.09 | 2.36 | 0.634 | 491.3 | 500.0 | 508.8 | 517.5 | 526.4 | 535.1 | 543.9 ||

35.3 | 544.1 |)
53 || 46.0 | 0.326 | 3.63 | 2.82 | 0.563 | 491.7 | 500.4 | 509.2 | 518.0 | 526.8 | 535.5 | 544.3 |
52 || 44.3 | 0.307 | 3.43 | 3.02 | 0.532 | 491.8 | 500.5 | 509.3 | 518.1 | 526.9 | 535.6 | 544.4 ||
51 42.6 | 0.289 | 3.24 | 3.21 | 0.502 ; 491.9 | 500.6 | 509.4 | 518.2 | 527.0 | 535.7 | 544.5 ||
50 || 40.9 | 0.273 | 3.05 | 3.40 | 0.473 | 492.0 | 500.7 | 509.5 | 518.3 | 527.1 | 535.8 | 544.6 |,
49 || 39.2 | 0.257 | 2.07 | 3.58 | 0.445 | 492.1 | 500.8 | 509.6 | 518.4 | 527.2 | 535.9 | 544.7 ||
48 || 37.5 | 0.242 | 2.71 | 3.74 | 0.420 | 492.2 | 500.9 | 509.7 | 518.5 | 527.3 | 536.0 | 544.8

47 || 35.8 | 0.228 | 2.56 | 3.89 | 0.397 | 492.3 | 501.0 | 509.8 | 518.6 | 527.4 | 536.1 | 544.9 ||
46 || 34.1 | 0.215 | 2.41 | 4.04 | 0.374 | 492.4 | 501.1 | 509.9 | 518.7 | 527.5 | 536.2 | 545.0
45 || 32.4 | 0.202 | 2.26 | 4.19 | 0.351 | 492.5 | 501.2 | 510.0 | 518.8 | 527.6 | 536.3 | 545.1
44 || 30.7 | 0.190 | 2.13 | 4.32 | 0.330 | 492.5 | 501.2 | 510.0 | 518.8 | 527.6 | 536.3 | 545.1
43 || 29.0 | 0.179 | 2.00 | 4.45 | 0.310 | 492.6 | 501.3 | 510.1 | 518.9 | 527.7 | 536.4 | 545.2
42 || 27.3 | 0.168 | 1.87 | 4.58 | 0.290 492.7 | 501.4 | 510.2 | 519.0 | 527.8 | 536.5 45.3 |,

B 121

54 || 47.7 | 0.345 | 3.85 | 2.60 | 0.597 | 491.5 | 500.2 | 509.0 | 517.7 | 526.6 | 5:

158

PSYCHROMETRICAL TABLES.

| Reading
of Ther-
moweter,

Faar.

t
| Dry.

Wet.

5 oO
64} 64
63
62
61
60
59
58
57

or
o

>

co
aaa DH
am Ot

ew &

aocoraa»an an
oant me &

own
_—

ee ttt
an woveor wun

wee
Ww -e ©

—
or

=
bo

aSawoerkewWDaNnNeaUwonrkKueDWaUNeEOaNSO

aN Oo ke SO

oa

ee here
ae

. °
a ND

Force
of
Vapor
in

English
juches.

in.
0.597
0.565
0.584
0.504
0.476
0.450
0.425
0.401
0.379
0.357
0.337
0.318
0.300
0.282
0.266
0.251
0.236
0.223
0.210
0.197
0.156
0.175
0.164

0.617
0.586
0.555
0.527
0.499
0.473
0.449
0.425
0.402
0.381
0.361
0.342
0.323
0.306
0.289
0.274
0.259
0.245
0.231
0.219
0.207
0.195
0.18 4
0.174

aS

or or or

aan

or or

tO

Weight
of Vapor. 4
| Reqd.
Ina | _ for
Cubie | Sat?n.
Foot of of aCu-
Air. |bic Ft.
of Air.
gr. gr
-65 | 0.00
29 | 0.36
94 | OF71
-61 | 1.04
sol | 1.34

5.01 | 1.64
Ad | 1292
4.47 | 2.18
4.23 | 2.42
3.98 | 2.67
Selo) 290
3.55 | 3.10
3034. Bro
Sel'd» | 3300
2.96 | 3.69
2.79 | 3.86
2.63 | 4.02
2.47 | 4.18
2.33 | 4.32
2.19 | 4.46
2.06 | 4.59
OA | teal
.83 | 4.82

87 | 0.00
51 | 0.36
17 0370
85 | 1.02
55 | 1.32
25 | 1.62
98 | 1.89
ide sae
4.47 | 2.40
4.23 | 2.64
4.01 | 2.56
3.79 | 3.08
3.60 | 3.27
3.39 | 3.48
3022 | ds00
3.04 | 3.83
2.87 | 4.00
2.72 CAS
2.57 | 4.30
2.43 | 4.44
2.31 | 4.56
2.17 | 4.70

2.05 | 4.82
1.94: 4.93

Hu-

midity,
Satura-

tion =

1 Quo.

1.000
0.946
0.893
0.843
0.798
0.753
0.711
0.672
0.636
0.598
0.564
0.534
0.502
0.473
0.445
0.419
0.396
0.372
0.351
0.330
0.310
0.292
0.275

1.000
0.9417
0.898
0.851
0.808
0.765
0.725
0.687
0.651
0.616
0.584
0.552
0.524
0.493
0.469
0.442
0.418
0.396
0.374
0.354
0.336
0.316
0.299
0.283

—
“

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

in.

28.0

gr.
489.1
489.3
489.5
489.7
489.9
490.0
490.1
490.2
490.4
490.5
490.7
490.8
490.9
491.0
491.2
491.3
491.4
491.5
491.6
491.7
491.7
491.8
491.9

488.1
488.3
488.5
488.7
488.9
489.0
489.1
489.3
489.4
489.6
489.7
489.8
489.9
490.0
490.1
490.2
490.3
490.3
490.4
490.5
490.6
490.7
490.7

| 490.8

122

in.

28.5

gr.
497.8

498.0
498.2
498.4
493.6
498.7
498.8
498.9
499.1
499.2

499.4
499.5
499.6
499.7
499.9
500.0

500.1
500.2

500.3

500.4

500.4

500.5
500.6

496.8
497.0
497.2
497.4
497.6
497.7
497.8
498.0
498.1
4198.3
498.4
498.5
498.6
198.7
498.8
498.9
499.0
499.0
499.1
499.2
4199.3
499.4
499.4

499.5

in.
29.0

gr.

506.6
506.8
507.0
507.2
507.4
507.5
507.6
507.7
507.9
508 0
508.2
508.3
508.4
508.5
508.7
508.8
508.9
509.0
509.1
509.2
509.2
509.3
509.4

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gr.
532.7
532.9
533.1
533.
533.
533.6
533.
533.$
534.
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534.
534.
534.
534.
534.
535.
535.
535.
535.
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532.
532.
532.
532.
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533.
533.
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533.9

534.0

534.1

534.2

534.3

534.3 |

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PSYCHROMETRICAL TABLES.

159

oo]
Reading | | aevenee Weight in Grains of a Cubic Foot of Air.
of Ther- Temp.| Kore ee Hu-
mometer, . of of Reqd. | midity, | — ; : 5; : ry
Fabr. Dew- | Vapor | Ina for | Satura- Height of the Barometer in English Inches.
Point, in | Cubic | Sut’n | tion = = ;
| | Far. aE Pee een | 1.000. in. in. in. in. in. in. in. |:
Bec Wet of Air. 28.0/28.5 29.0 29.5 30.0 30.5 31.0
BI ° ° in. gr gr. gr. gr. gr. gr. gr. gr. gr.
66 | 66 66.0 | 0.638 | 7.08 | 0.00 | 1.000 | 487.0 | 495.7 | 504.4 | 513.1 | 521.8 | 530.5 | 539.2 |
65 64.4 | 0.605 | 6.72 | 0.36 | 0.949 | 487.2 | 495.9 | 504.6 | 513.3 | 522.0 | 530.7 | 539-4 |
64 62.8 | 0.574 | 6.35 | 0.73 | 0.597 | 487.3 | 496.0 | 504 7 | 513.4 | 522.1 | 530.8 | 539.5
63 61.2 | 0.544 | 6.04 | 1.04 | 0.853 | 487.5 | 496.2 | 504.9 | 513.6 | 522.3 | 531.0 | 539.7 ||
62 || 59.6 | 0.516 | 5.72 | 1.36 | 0.808 | 487.7 | 496.4 | 505.1 |! 513.8 | 522.5 | 531.2 | 539 9 1
61 | 58.0 | 0.489 | 5.42 | 1.66 | 0.766 | 487.9 | 496.6 | 505.3 | 514.0 | 522.7 | 531.4 | 540.1 ||
60 | 56.4 ; 0.464 | 5.14 | 1.94 | 0.726 | 488.0 | 496.7 | 505.4 | 514.1 | 522.8 | 531.5 | 540.2 |
59 54.8 | 0.440 | 4.88 | 2.20 | 0.689 | 488.1 | 496.8 | 505.5 | 514.2 | 523.0 | 531.7 | 540.4 |;
58 || 53.2 | 0.416 | 4.62 | 2.46 | 0.652 | 488.2 | 496.9 | 505.6 | 514.3 | 523.1 | 531.8 | 540.5
57 51.6 | 0.394 | 4.37 | 2.71 | 0.619 | 488.4 | 497.1 | 505.8 | 514.5 | 523.3 | 532.0 | 540.7 ||
56 || 50.0 | 0.373 | 4.15 | 2.93 | 0.586 | 488.5 | 497.2 | 505.9 | 514.6 | 523.4 | 532.1 | 540.8
55 || 48.4] 0.354 | 3.92 | 3.16 | 0.553 | 188.6 | 497.3 | 506.1 | 514.8 | 523.5 | 532.2 | 541.0
54 || 46.8 | 0.335 | 3.72 | 3.36 | 0.525 | 488.8 | 497.5 | 506.3 | 515.0 | 523.7 | 532.4 | 541.2
53 | 45.2 | 0.317 | 3.51 | 3.57 | 0.496 | 488.9 | 497.6 | 506.4 | 515.1 | 523.8 | 532.5 | 541.3 |
52 || 43.6 | 0.300 | 3.33 | 3.75 | 0.470 | 489.0 | 497.7 | 506.5 | 515.2 | 523.9 | 532.6 | 541.4
51 | 42.0 | 0.283 | 3.14 | 3.94 | 0.443 | 489.1 | 497.8 | 506.6 | 515.3 | 524.0 | 532.7 | 541.5 |
50 | 40.4 | 0.268 | 2.97 | 4.11 | 0.419 | 489.2 | 497.9 | 506.7 | 515.4 | 524.1 | 532.8 | 541.6 |;
49 | 38.8 | 0.253 | 2.81 | 4.27 | 0.397 | 489.3 | 498.0 | 506.8 | 515.5 | 524.2 | 532.9 | 541.7
48 | 37.2 | 0.240 | 2.66 | 4.42 | 0.376 | 489.4 | 498.1 | 506.9 | 515.6 | 524.3 | 533.0 | 541.8 ||
47 | 35.6 | 0.227 | 2.51 | 4.57 | 0.355 | 489.4 | 498.1 | 506.9 | 515.6 | 524.3 | 533.0 | 541.8 |;
46 || 34.0 | 0.214 | 2.37 | 4.71 | 0.335 | 489.5 | 498.2 | 507.0 | 515.7 | 524.4 | 533.1 | 541.9 |
45 32.4 | 0.202 | 2.24 | 4.84 | 0.316 | 489.6 | 498.3 | 507.1 | 515.8 | 524.5 | 533.2 | 542.0 |
44 | 30.8 | 0.191 | 2.12 | 4.96 | 0.299 | 489.7 | 498.4 | 507.2 | 515.9 | 524.6 | 533.3 | 542.1 |
43 || 29.2 | 0.180 | 2.00 | 5.08 | 0.283 | 489.7 | 498.4 | 507.2 | 515.9 | 524.6 | 533.3 | 542.1 |
\
67 | 67 67.0 | 0.659 | 7.30 | 0.00 | 1.000 | 485.9 | 494.6 | 503.3 | 512.0 | 520.6 | 529.3 | 538.0 |
66 65.4 | 0.626 | 6.93 | 0.3 0.919 | 486.1 | 494.8 | 503.5 | 512.2 | 520.8 | 529.5 | 538.2
65 63-8 | 0.593 | 6.55 | 0.75 | 0.897 | 486.3 | 495.0 | 503.7 | 512.4 | 521.0 | 529.7 | 538.4 |
64 62.2 | 0.563 | 6.23 | 1.07 | 0.853 | 486.5 | 495.2 | 503.9 | 512.6 | 521.2 | 529.9 | 538.6 |
63 || 60.6 | 0.534 | 5.91 | 1.39 | 0.810 | 486.7 | 495.4 | 504.1 | 512.8 | 521.4 | 530.1 | 538.8 ||
62 59.0 | 0.506 | 5.60 | 1.70 | 0.767 | 486.8 | 495.5 | 504.2 | 512.9 | 521.6 | 530.3 | 539.0 |
61 57-4 | 0.480 | 5.31 | 1.99 | 0.728 | 486.9 | 495.6 | 504.3 | 513.0 | 521.7 | 530.4 | 539.1 |
60 59-8 | 0.455 | 5.04 | 2.26 | 0.691 | 487.1 | 495.8 | 504.5 | 513.2 | 521.9 | 530.6 | 539.3 |
59 54.2 |,0.431 | 4.77 | 2.53 | 0.653 | 487.2 | 495.9 | 504.6 | 513.3 | 522.0 | 530.7 | 539.4 |
58 52.6 | 0.408 | 4.52 | 2.78 | 0.619 | 487.3 | 496.0 | 504.7 | 513.4 | 522.1 | 530.8 | 539.5 ||
57 51.0 | 0.386 | 4.28 | 3.02 | 0.586 | 487.5 | 496.2 | 504.9 | 513.6 | 522.3 | 531.0 | 539.7 |
56 49.4 | 0.366 | 4.05 | 3.25 | 0.555 | 487.6 | 496.3 | 505.0 | 513.7 | 522.4 | 531.1 | 539.8
| 55 47.8 | 0.346 | 3.83 | 3.47 | 0.524 | 487.8 | 496.5 | 505.1 | 513.8 | 522.6 | 531.2 | 549.9 |
54 46.2 | 0.328 | 3.62 | 3.68 | 0.496 | 457.9 | 496.6 | 505.2 | 513.9 | 522.7 | 531.3 | 540.0 |
| 53 44.6 | 0.310 | 3.43 | 3.87 | 0.470 | 488.0 | 496.7 | 505.3 | 514.0 | 522.8 | 531.4 | 540.1 ||
52 43.0 | 0.293 | 3.25 | 4.05 | 0.445 | 488.1 | 496.8 | 504.4 | 514.1 | 522.9 | 531.5 | 540.2
51 41.4 | 0.278 | 3.08 | 4.22 | 0.422 | 488.2 | 496.9 | 505.5 | 514.2 | 523.0 | 531.6 | 540.3
50 39.5 | 0.263 | 2.91 | 4.39 | 0.399 | 488.4 | 497.1 | 505.7 | 514.4 | 523.1 | 531.8 | 540.5 |
49 38.2 | 0.248 | 2.75 | 4.55 | 0.377 | 488.5 | 497.2 | 505.8 | 514.5 | 523.2 | 531.9 | 540.6
B 123

PSYCHROMETRICAL TABLES.

160
Ae inee Temp.| Force
mometer, || of of
Fahr. Dew- Vapor
A Enalish
Dry.| Wet. ea
O o ° in.
67| 49 || 38.2 | 0.248
48 | 36.6 | 0.235
47. || 35.0 | 0.222
46 || 33.4] 0.210
45. || 31.8 | 0.198
44. || 30.2 | 0.187
68 | 68 || 68.0 | 0.681
67 || 66.4 | 0.646
66 || 64.8 | 0.613
65 || 63.2 | 0.582
64 || 61.6 | 0.552
63 || 60.0 | 0.523
62 || 58.4] 0.496
61 || 56.8 | 0.4170
60 || 55.2 | 0.445
59 || 53.6 | 0.422
58 || 52.0] 0.400
57 || 50.4 | 0.379
56 || 48.8 | 0.358
55 || 47.2 | 0.339
54 145.6 | 0.321
| 53 || 44.0 | 0.304
| 52 || 42.4 | 0.287
51 || 40.8 | 0.272
50 || 39.2 | 0.257
49 ||37.6 | 0.243
48 || 36.0 | 0.230
47 34.4 | 0.217
46 || 32.8 | 0.205
45 || 31.2 | 0.194
44 | 29.6 | 0.183
69) 69 | 69.0} 0.704

68 || 67.4 | 0.668
67 || 65.8 | 0.634
66 || 64.2 | 0.601
65 || 62.6 | 0.570

64 || 61.0 | 0.541

63. || 59.4 | 0.513
62. || 57.8 | 0.486
56.2 | 0.461
60 || 54.6 | 0.437
59 || 53.0 | 0.414
58 || 51.4 | 0.392

Weight
of Vapor

Ina
Cubic
Foot of
Air.

gr
2.75
2.60
2.46
2.32
2.19
2.07

7.53
7.15
6.77
6.43
6.10
5.78

5.47
5.20
4.93
4.67
4.42
4.19

3.96
3.75
3.54
3.35
3.17
3.00

2.84
2.68
2.54
2.40
2027
2.15

-O4

bo ib

7.76
7.37
7.00
6.63
6.29
5.97
5.65
5.37
5.09
4.82
4.57
4.33

Reqd.
for
Sat’n.
ofaCu-
bic Ft.
of Air.

gr
4.55
4.70
4.84
4.98
5.11
5.23

0.00
0.38
0.76
1.10
1.43
1.75

2.06
2.33
2.60
2.86
3.11
3.34

3.57
3.78
3.99
4.18
4.36
4.53

4.69
4.85
4.99
5.13
5.26
5.38
5.49

0.00
0.39
0.76
1.13
1.47
1.79

2.11
2.39
2.67
2.94
3.19
3.43

Hu-
midity,
Satura-

tion =

Weight in Grains of a Cubie Foot of Air.

Height of the Barometer in English Inches.

=

1.000.

0.377
0.356
0.337
0.318
0.301
0.284

1.000
0.949
0.899
0.854
0.810
0.768

0.726
0.691
0.655
0.620
0.587
0.556

0.526
0.498
0.470
0.445
0.421
0.399

0.377
0.356
0.337
0.319
0.302
0.286
0.271

1.000
0.950
0.902
0.854
0.810
0.769

0.728
0.693
0.657
0.621
0.589

—
in.
28.0
gr.
488.5
488.6
488.7
488.7
488.8
488.9

484.9
485.1
485.3
485.5
485.7
485.8
485.9
486.0
486.2
486.3
486.4

in.
28.35)

gr.
497.2
497.3
497.4
497.4
497.5
497.6

493.5
493.8
494.0
494.2
494.4
494.5

494.6
494.7
494.9
495.0

486.6

486.7
486.8
486.9
487.0
487.1
487.2

487.3
487.4
487.5
487.6
487.6
487.7
487.8

483.8
484.0
484.2
484.4
484.6
484.8

485.0
485.1
485.1
485.2
485.4

495.1
495.3

495.4
495.5
495.6
495.7
495.8
495.9

in.
29.90

gr.
505.8

505.9
505.9
506.0
506.1
506.2

502.2
502.5
502.6
502.8
503.0
503.1

503.3
503.4
503.6
503.7
503.8
504.0
504.1
504.2
504.3
504.4
504.5
504.6

496.0
496.1
496.2
496.3
496.35
496.4
496.5

492.4
492.6
492.8
493.0
493.2
493.4

493.6
493.7

493.7
493.9
494.1

0.558 | 485.5

oe

124

494.2

504.7
504.8
504.9
505.0
505.0
505.1
505.2

501.1
501.3
501.5
501.7
501.9
502.1

502.3
502.4
502.6
502.7
502.8
502.9

in. | in. in
29.5 30.0) 30.5

gr.
514.5

514.6
514.7
514.7
514.8
514.9

510.8
511.1
511.2
511.4
511.6
511.8
512.0
512.1
512.3
512.4
512.5
512.7

512.8
512.9
513.0
513.1
513.2
513.3

513.4
513.5
513.6!
513.7
513.7
513.8
513.9

509.7
509.9
510.1
510.3
510.5
510.7

510.9

511.0
511.2
511.3

511.5
511.6

gr.
523.2
523.3

523.4
523.4
523.5
523.6

519.5
519.7
519.9
520.1
520.3
520.5
520.7
520.8
521.0
521.1
521.2
521.4

521.5
521.6
521.7
521.8
521.9
522.0

522.1
522.2
522.3
522.4
522.4
522.5
522.6

518.3
518.5
518.7
518.9
519.1
519.3

519.5
519.6
519.8
519.9
520.1
520.2

gr.
531.9

532.0
532.1
532.1
532.2
532.3

528.1
528.4
528.6
528.8
529.0
529.2

529.4
529.5
529.7
529.8
529.9
530.1

530.2
530.3
530.4
530.5
530.6
530.7

530.8
530.9
531.0
531.1
531.1
531.2
531.3

527.0
527.2
527.4
527.6
527.8
528.0

528.2
528.3
528.5
528.6
528.8
528.9

L
31 6 |

gr.
540.6

540.7
540.8 |
540.8

540.9 |
541.0

536.8
587.1
537.3
537.5 |
537.7
537.9 |

538.1
538.3
538.5
538.6
538.6 ||
538.8 |!

538.9 |!
539.0 ||
539.1
539.2
539.3
539.4

539.5
539.6
539.7
539.8
539.8
539.9
540.0

535.6
535.8
536.0
536.2
536.4
536.6
536.8
536.9
537.1
537.3
537.5
537.6 |

\

Reading

°

Oo
69 | 58

70 | 70

59
58
57

56
55
54
53
52
51
50

49
48
47
46
45
44
43

a

'
} a
of Ther-
mometer,
Fahr.
Dry.| Wet.

PSYCHROMETRICAL TABLES.

161

Dew- | Vapor Ina

See ee

Weight
bev Weight in Grains of a Cubic Foot of Air.
Temp Korce:4 |= re

Vapor

Reqd.
for

: in Cubic | Sat’n.
Ee English Foot of ofaCu-

Inches. | Air.

° in. gr.
51.4 | 0.392 | 4.33
49.8 | 0.371 | 4.09
48.2 | 0.351 | 3.87
46.6 | 0.332 | 3.66
45.0 | 0.315 | 3.47
43.4 | 0.298 | 3.29
41.8 | 0.282 | 3.11

bic Ft.
of Air.

gr.
3.43
3.67
3.89
4.10
4.29
4.47
4.65

40.2 | 0.266 | 2.94 | 4.82
38.6 | 0.252 | 2.78 | 4.98

37.0 | 0.238 | 2.63
35.4 | 0.225 | 2.49

5.13
5.27

33.8 | 0.213 | 2.34 | 5.42
32.2 | 0.201 | 2.20 | 5.56
30.6 | 0.190 | 2.06 | 5.70

70.0 | 0.727 | 8.00 | 0.00
68.5 | 0.692 | 7.62 | 0.38
67.0 | 0.659 | 7.26 | 0.74

65.5 | 0.628 | 6.91

1.09

64.0 | 0.597 | 6.57 | 1.43
62.5 | 0.568 | 6.25 | 1.75
61.0 | 0.541 | 5.95 | 2.05

59.5 | 0.515 | 5.66 | 2.34
58.0 | 0.489 | 5.38 | 2.62
56.5 | 0.465 | 5.12 | 2.88

| 55.0 | 0.442 | 4.87 | 3.13

53.5 | 0.421 | 4.62 | 3.38
52.0 | 0.400 | 4.40 | 3.60
50.5 | 0.380 | 4.18 | 3.82

49.0 | 0.361 | 3.96 | 4.04
47.5 | 0.343 | 3.76 | 4.24
46.0 | 0.326 | 3.57 | 4.43
44.5 | 0.309 | 3.40 | 4.60
43.0 | 0.292 | 3.23 | 4.77
41.5 | 0.279 | 3.07 | 4.93

40.0 | 0.264 | 2.81

5.19

38.5 | 0.251 | 2.76 | 5.24
37.0 | 0.238 | 2.63 | 5.37
35.5 | 0.226 | 2.50 | 5.50
34.0 | 0.214 | 2.37 | 5.63
32.5 | 0.203 | 2.24 | 5.76
31.0 | 0.192 | 2.12 | 5.88
29.5 | 0.182 | 2.01 | 5.99

midity,
Satura-

Height of the Barometer in English Inches.

tion =

1.000.

0.558
0.527
0.499
0.472
0.447
0.424
0.401

0.379
0.3538
0.339
0.321
0.302
0.284
0.266

1.000
0.953
0.907
0.865
0.822
0.781
0.744

0.708
0.672
0.640
0.609
0.578
0.550
0.522

0.495
0.470
0.446
0.425
0.404
0.384
0.351

0.345
0.329
0.315
0.296
0.280
0.265

0.251 |

oes
in. in.
28.0 28.5
gr. gr.
485.5 | 494.2
485.7 | 494.4
485.8 | 494.5
485.9 | 494.6
486.0 | 494.7
486.1 | 494.8
486.2 | 494.9

486.3
486.4
486.5
486.6
486.7
486.8
4186.8

eer Pee
eee oe © &
Ov or or or Or or or
Or WN O&O

_
©
oi ¢

482.8 | 491.4
483.0 | 491.6
483.2 | 491.8
483.3 | 491.9
483.5 | 192.1
483.7 | 492.3
483.8 | 492.4

484.0 | 492.6
484.2 | 492.8
.484.3 | 492.9
484.4 | 493.0
484.6 | 493.2
484.7 | 493.3
484.8 | 493.4

484.9 | 493.5
485.1 | 493.7
485.2 | 493.8
485.3 | 495.9
485.4 | 494.0
485.5 | 494.1
485.5 | 494.1

485.6 | 494.2
485.7 | 494.3
485.8 | 494.4
485.8 | 494.4
485.9 | 494.5
486.0 | 494.6
486.1 | 494.7

in. in.
29.0, 29.5

gr. gr.
502.9 | 511.

503.1 | 511.8
503.2 | 511.9
503.3 | 512.0
503.4 | 512.1
503.5 | 512.2
503.6 | 512.3

503.7 | 512.4
5038.8 | 512.5
503.9 | 512.6
504.0 | 512.7
504.1 | 512.8
504.2 | 512.9
504.2 | 512.9

500.0 | 508.6
500.2 | 508.8
500.4 | 509.0
500.5 | 509.1
500.7 | 509.3
500.9 | 509.5
501.0 | 509.6

501.2 | 509.8
501.4 | 510.0
501.5 | 510.1
501.6 | 510.2
501.8 | 510.4
501.9 | 510.5
502.0 | 510.6

502.1 | 510.7
502.3 | 510.9
502.4 | 511.0
502.5 | 511.1
502.6 | 511.2
502.7 | 511.3
502.7 | 511.3

502.8 | 511.4
502.9 | 511.5
503.0 | 511.6
503.0 | 511.6
503.1 | 511.7
503.2 | 511.8
503.3 | 511.9

in.
| 30.0
gr. gr.
520.2 | 528.9

520.4 | 529.1
520.5 | 529.2
520.6 | 529.3
520.7 | 529.4
520.8 | 529.5
520.9 | 529.6

521.0 | 529.7

521.1 | 529.8 | 538.5
521.2 | 529.9 | 538.6
521.3 | 530.0 | 538.7

521.4 | 530.1

521.5 | 530.2 | 538.9
521.5 | 530.2 | 535.9

517.2 | 525.8 | 534.4
517.4 | 526.0 | 534.6
517.6 | 526.2 | 534.8
517.7 | 526.3 | 534.9
517.9 | 526.5 | 535.1
518.1 | 526.7 | 535.3 |)
518.3 | 526.9 | 535.5

518.5 | 527.1

518.7 | 527.3 | 535.9
518.8 | 527.4 | 536.0
518.9 | 527.5 | 536.1
519.1 | 527.7 | 536.3
519.2 | 527.8 | 536.4
519.3 | 527.9 | 536.5 |

519.4 | 528.0 | 536.6 |;
519.6 | 528.2 | 536.8
519.7 | 528.3 | 536.9
519.8 | 528.4 | 537.0
519.9 | 528.5 | 537.1
520.0 | 528.6 | 537.2
520.0 | 528.6 | 537.2

520.1 | 528.7 | 537.3
520.2 | 528.8 | 537.4
520.3 | 528.9 | 537.5
520.3 | 528.9 | 537.5
520.4 | 529.0 | 537.6

520.5 | 529.1
520.6 | 529.2

in. in.
30.5| 31.0

gr.
537.6

537.8
537.9
538.0
538.1
538.2
538.3

538.4

538.8

535.7

537.7
537.8

162 PSYCHROMETRICAL TABLES.

Weight SA ge i Scie :
‘| Readin ; Weight in Grains of a Cubic Foot of Air.
of Ther. Temp.| Force Lover Hu-
mometer, of of Reqd. | midity, = ;
aie Dew- | Vapor | Ina | for | gatura- Height of the Barometer in English Inches.
\| || Point, | in Cubie | Sat’n tion = i
arian Fahr. | English |Foot of ofaCu-| 7 999, : 2 f : i F
{ i Inches.| Air. |bic Ft. in. in. in. in. in. in. iD
ij Dry- Wet. | jof Air. 28.0 28.5 29.0 29.5 30.0 30.5 31.0
al fife ye oe eos |
i} o oO in. gr gr. gr. gr. gr gr. gr gr er.
eed eczA 71.0 | 0.751 | 8.25 | 0.00 | 1.000 | 481.6 | 190.2 | 498.8 | 507.4 | 516.0 | 524.6 | 533.2
70 69.5 | 0.715 | 7.86 | 0.39 | 0.953 | 481.8 | 490.4 | 499.0 | 507.6 | 516.2 | 524.8 | 533.4
| 69 68.0 | 0.681 | 7-48 | 0.77 | 0.907 | 482.0 | 190.6 | 499 2 | 507.8 | 516.4 | 525.0 | 533.6
| 68 66.5 | 0.648 | 7.13 | 1.12 | 0.865 | 482.2 | 490.8 | 499.4 | 508.0 | 516.6 | 525.2 | 533.8
67 65.0 | 0.617 | 6.79 | 1.46 | 0.823 | 482.4 | 491.0 | 499.6 | 508.2 | 516.8 | 525.4 | 534.0
66 63.5 | 0.588 | 6.45 | 1.80 | 0.782 | 482.6 | 491.2 | 499.8 | 508.4 | 517.0 | 525.6 | 534.2
65 62.0 | 0.559 | 6.14 | 2.11 | 0.744 | 482.8 | 491.4 | 500 0 | 508.6 | 517.2 | 525.8 | 534.4

64 60.5 | 0.532 | 5.85 | 2.40 | 0.709 | 483.0 | 491.6 | 500.2 | 508.8 | 517.4 | 526.0 | 534.6
63 59.0 | 0.506 | 5.56 | 2.69 | 0.674 | 483.1 | 491.7 | 500.3 | 508.9 | 517.5 | 526.1 | 534.7
62 57.5 | 0.481 | 5.28 | 2.97 | 0.640 | 483.2 | 491.8 | 500.4 | 509.0 | 517.7 | 526.3 | 534.9
61 56.0 | 0.458 | 5.03 | 3.22 | 0.609 | 483.3 | 491.9 | 500.5 | 509.1 | 517.8 | 526.4 | 535.0
60 54.5 | 0.435 | 4.78 | 3.47 | 0.579 | 483.5 | 492.1 | 500.7 | 509.3 | 518.0 | 526.6 | 535.1
59 53.0 | 0.414 | 4.54 | 3.71 | 0.550 | 483.6 | 492.2 | 500.8 | 509.4 | 518.1 | 526.7 | 535.2
58 51.5 | 0.393 | 4.31 | 3.94 | 0.522 | 483.8 | 492.4 | 501.0 | 509.6 | 518.3 | 526.9 | 535.4
57 50.0 | 0.373 | 4.10 | 4.15 | 0.497 | 483.9 | 492.5 | 501.1 | 509.7 | 518.4 | 527.0 | 535.5

56 48.5 | 0.355 | 3.89 | 4.36 | 0.471 | 484.0 | 492.6 | 501.2 | 509.9 | 518.5 | 527.1 | 535.6
55 47.0 | 0.337 | 3.69 | 4.56 | 0.447 | 484.1 | 492.7 | 501.3 | 510.0 | 518.6 | 527.2 | 535.7
54 45.5 | 0.320 | 3.51 | 4.74 | 0.425 | 484.2 | 492.8 | 501.4 | 510.1 | 518.7 | 527.3 | 535.8
53 44.0 | 0.304 | 3.33 | 4.92 | 0.404 | 484.3 | 492.9 | 501.5 | 510.2 | 518.8 | 527.4 | 535.9
52 42.5 | 0.288 | 3.16 | 5.09 | 0.383 | 484.4 | 493.0 | 501.6 | 510.3 | 518.9 | 527.5 | 536.0

51 41.0 | 0.274 | 3.00 | 5.25 | 0.364 | 484.5 | 493.1 | 501.7 | 510.4 | 519.0 | 527.6 | 536.1
50 39.5 | 0.260 | 2 85 | 5.40 | 0.345 | 484.6 | 493.2 | 501.8 | 510.5 | 519.1 | 527.7 | 536.2
49 38.0 | 0.246 | 2.70 | 5.55 | 0.327 | 484.7 | 493.3 | 501.9 | 510.6 | 519.2 | 527.8 | 536.3
48 36.5 | 0.234 | 2.57 | 5.68 | 0.312 | 484.7 | 493.3 | 501.9 | 510.6 | 519.2 | 527.8 | 536.3
47 35.0 | 0.222 | 2.44 | 5.81 | 0.296 | 484.8 | 493.4 | 502.0 | 510.7 | 519.3 | 527.9 | 536.4
46 33.5 | 0.210 | 2.31 | 5.94 | 0.280 | 484.9 | 493.5 | 502.1 | 510.8 | 519.4 | 528.0 | 536.5
45 32.0 | 0.199 | 2.19 | 6.06 | 0.265 | 485.0 | 493.6 | 502.2 | 510.9 | 519.5 | 528.1 | 536.6
4d 30.5 | 0.189 | 2.05 | 6.17 | 0.252 | 485.0 | 493.6 | 502.2 | 510.9 | 519.5 | 528.1 | 536.6

| 72 | 72 || 72.0 | 0.776 | 8.50 | 0.00 | 1.000 | 480.6 | 489.2 | 497.8 | 506.4 | 514.9 | 523.5 | 532.1
| 71 70.5 | 0.739 | 8.10 | 0.40 | 0.953 | 480.8 | 489.4 498.0 | 506.5 | 515.1 | 523.7 | 532.3
70 || 69.0 | 0.704 | 7.71 | 0.79 | 0.907 | 481.0 | 489.6 | 498.2 | 506.7 | 515.3 | 523.9 | 532.5
'
I

69 || 67.5 | 0.670 | 7.35 | 1.15 | 0.865 | 481.2 | 489.8 | 498.4 | 506.9 | 515.5 | 524.1 | 532.7
68 || 66.0 | 0.638 | 7.00 | 1.50 | 0.824 | 481.4 | 490.0 | 498.5 | 507.1 | 515.7 | 524.3 | 532.9
67 || 64.5 | 0.607 | 6.66 | 1.84 | 0.784 | 481.6 | 490.2 | 498.7 | 507.3 | 515.9 | 524.5 | 533.1
66 || 63.0 | 0.578 | 6.33 | 2.17 | 0.745 | 481.7 | 490.3 | 498.8 | 507.4 | 516.1 | 524.7 | 533.3

65 || 61.5 | 0.550 | 6.03 | 2.47 | 0.710 | 481.8 | 490.4 | 499.0 | 507.6 | 516.2 | 524.8 | 533.4
\ 64 60.0 | 0.523 | 5.73 | 2.77 | 0.674 | 482.0 | 490.6 | 499.2 | 507.8 | 516.4 | 525.0 | 533.6
63 58.5 | 0.498 | 5.45 | 3.05 | 0.641 | 452.1 | 490.7 | 499.3 | 507.9 | 516.5 | 525.1 | 533.7
62 || 57.0 | 0.473 | 5.18 | 3.32 | 0.610 | 482.3 | 490.9 | 499.5 | 508.1 | 516.7 | 525.3 | 533.9
| 61 55.5 | 0.450 | 4.93 | 3.57 | 0.580 | 482.5 | 491.1 | 499.7 | 508.3 | 516.9 | 525.5
60 || 54.0 | 0.428 | 4.68 | 3.82 | 0.551 | 482.6 | 491.2 | 499.8 | 508.4 | 517.0 | 525.6
525.8

| 59 52.5 | 0.407 | 4.45 | 4.05 0.523 | 482.8 491.4 | 500.0 | 508.6 | 517.2

B 126

PSYCHROMETRICAL TABLES. 163

Se

———————————————————
Weight
of Vapor _

Reading |
of Ther-
mometer, |
Fahr.

Temp.
of

Dew-

Point,

|| Fahr.

°

\| 52.5

51.0
49.5

| 48.0

46.5
45.0
43.5

42.0
40.5
39.0
37.5
36.0
34.5
33.0
31.5

E Hu-
of Reqd. midity,
Vapor | Ina | for | Satura-
in Cubic | Sat’n.

ti =
English Foot of ofaCu- 1.000.

Inches. | Air. |bic Ft.
of Air.

in. gr. gr
0.407 | 4.45 | 4.05 | 0.523
0.386 | 4.23 | 4.27 | 0.498
(0.367 | 4.02 | 4.48 | 0.473
0.349 | 3.82 | 4.68 | 0.449
0.331 | 3.63 | 4.87 | 0.427
0.315 | 3.45 | 5.05 | 0.406
0.299 | 3.28 | 5.22 | 0.386

0.283 | 3.11 | 5.39 | 0.366
0.269 | 2.95 | 5.55 | 0.347
0.255 | 2.80 | 5.70 | 0.329
0.242 | 2.66 | 5.84 | 0.313
0.230 | 2.52 | 5.98 | 0.296
0.218 | 2.39 | 6.11 | 0.251
0.207 | 2.27 | 6.23 | 0.267
0.196 | 2.16 | 6.34 | 0.254

0.801 | 8.76 | 0.00 | 1.000
0.736 | 8.35 | 0.41 | 0.953
0.727 | 7.95 | 0.81 | 0.908
0.692 | 7.57 | 1.19 | 0.564
0.659 | 7.21 | 1.55 | 0.823
0.628 | 6.87 | 1.89 | 0.784
0.597 | 6.53 | 2.23 | 0.745

0.568 | 6.22 | 2.54 | 0.710
0.541 4 5.92 | 2.84 | 0.676
0.515 | 5.63 | 3.13 | 0.643
0.489 | 5.34 | 3.42 | 0.610
0.465 | 5.09 | 3.67 | 0.581
0.442 | 4.84 | 3.92 | 0.553
0.421 | 4.59 | 4.17 | 0.524

0.400 | 4.37 | 4.39 | 0.499
0.380 | 4.16 | 4.60 | 0.475
0.361 | 3.94 | 4.82 | 0.450
0.343 | 3.74 | 5.02 | 0.427
0.326 | 3.56 | 5.20 | 0.406
0.309 | 3.38 | 5.38 | 0.386
0.293 | 3.21 | 5.55 | 0.366

0.279 | 3.05 | 5.71 | 0.348
0.264 | 2.89 | 5.87 | 0.330
0.251 | 2.74 | 6.02 | 0.313
0.238 | 2.60 | 6.16 | 0.297
0.226 | 2.47 | 6.29 | 0.282
0.214 | 2.34 | 6.42 | 0.267
| 0.203 | 2.22 | 6.54 | 0.253 |

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

ro al

in. in. in. in. in. in.
28.0) 28.5 29.0 29.5| 30.0) 30.5) 31.0

gr.
482.8

482.9
483.0
483.1
483.2
483.3
483.3

483.5
483.6
483.7
483.8
483.8
483.9
484.0
484.1

479.6
479.8
480.0
480.2
480.4
480.5
480.7

480.8
481.0
481.1
481.2
481.4
481.6
481.7

481.8
482.0
482.1
482.2
482.3
482.4
482.5

482.6
482.7
482.8
482.9
483.0
483.1
433.3

in.

gr. gr. gr. gr. gr.
491.4 | 500.0 | 508.6 | 517.2 525.8 | 534.4
491.5 | 500.1 | 508.7 | 517.3 525.9 | 534.5
491.6 | 500.2 | 508.8 | 517.4 526.0 | 534.6
491.7 | 500.3 | 508.9 | 517.5 | 526.1 534.7
491.8 | 500.4 | 509.0 | 517.6 526.2 | 534.8
491.9 | 500.5 | 509.1 | 517.7 526.2 | 534.9
492.0 | 500.6 | 509.2 | 517.8 526.3 | 535.0

492.1 | 500.7 | 509.3 | 517.9 | 526.4 535.1
492.2 | 500.8 | 509.4 | 518.0 | 526.5 | 535.2
492.3 | 500.9 | 509.5 | 518.1 | 526.6 | 535.3
492.4 | 501.0 | 509.6 | 518.2 | 526.7 | 535.4
492.4 | 501.0 | 509.6 | 518.2 | 526.7 | 535.4
492.5 | 501.2 | 509.7 | 518.3 | 526.8 | 535.5
492.6 | 501.3 | 509.8 | 518.4 | 526.9 | 535.6
492.7 | 501.3 | 509.9 | 518.5 | 527.1 | 535.7

488.1 | 496.7 | 505.2 | 513.8 | 522.3 | 530.9
488.3 | 496.9 | 505.4 | 514.0 | 522.5 | 531.1
488.5 | 497.1 | 505.6 | 514.2 | 522.7 | 531.3
488.7 | 497.3 | 505.8 | 514.4 | 522.9 | 531.5
488.9 | 497.5 | 506.0 | 514.6 | 523.1 | 531.7
489.0 | 497.6 | 506.1 | 514.8 | 523.3 | 531.9 ||
489.2 | 497.8 | 506.3 | 515.0 | 523.5 | 532.1 |!

489.3 | 497.9 | 506.4 | 515.1 | 523.6 532.2
489.5 | 498.1 | 506.6 | 515.3 | 523.8 | 532.4
489.6 | 498.2 | 506.8 | 515.4 | 524.0 532.6
489.8 | 498.4 | 507.0 | 515.6 | 524.2 532.8
490.0 | 498.6 | 507.2 | 515.8 | 524.4 533.0 ||

490.2 | 498.8 | 507.4 | 516.0 | 524.6 533.2

490.3 | 498.9 | 507.5 | 516.1 | 524.7 533.3

490.4 | 499.0 | 507.6 | 516.2 | 524.8 533.4
490.6 | 499.2 | 507.8 | 516.4 | 525.0 533.6
490.7 | 499.3 | 507.9 | 516.5 | 525.1 | 533.7
490.8 | 499.4 | 508.0 | 516.6 | 525.2 533.8
490.9 | 499.5 | 508.1 | 516.7 | 525.3 533.9
491.0 | 499.6 | 508.2 | 516.8 | 525.4 534.0
491.1 | 499.7 | 508.3 | 516.9

on
tw
-

ox
or
oo
_
_—

491.2 | 499.8 | 508.4 | 517.0 | 525.6 | 534.2
491.3 | 499.9 | 508.5 | 517.1 | 525.7 | 534.5
491.4 | 500.0 | 508.6 | 517.2 | 525.8 | 534.4
491.5 | 500.0 | 508.6 | 517.2 | 525.8 | 534-4
491.6 | 500.1 | 508.7 | 517.3 | 525.9 | 534.5
491.7 | 500.2 | 508.8 | 517.4] 526.0 534.6 |
491.9 | 500.4 | 509.1 | 517.6 | 526.2 534.8 |

127

164

Reading
of Ther-

mometer,
Fahr.

Dry.

°
74

Wet.

Temp.
of
Dew-

Point,
Fahr.

°
74.0
72.5
71.0
69.5
68.0
66.5
65.0

63.5
62.0

59.0
57.5
56.0
54.5

38.0

35.0
33.5

aoanwrwt a 2
Aart vconwnwa
SOU oe) Ou ee>

S

S
SE eee ee ee eee
OWS Ot Ore 1S) Ot

Inches.

in.
0.827
0.787
0.751
0.715
0.681
0.648
0.617

0.588
0.559
0.532
0.506
0.481
0.458
0.435

0.414
0.393
0.373
0.355
0.337
0.320
0.304

0.288
0.274
0.260
0.246
0.234
0.222
0.210

0.854
0.814
0.776
0.739
0.704
0.670
0.638

0.607
0.578
0.550
0.523
0.498
0.473

0.450

PSYCHROMETRICAL TABLES.

Weight
of Vapor

Ina
Cubic
Foot of
Air.

gr
9.04
8.60
8.20
7.81
TA4
7.08
6.75

6.41
6.10
5.81
5.52
5.24
4.99
4.75

4.52
4.29
4.08
3.86
3.66
3.48
3.32

3.15
2.99
2.83
2.69
2.55
2.42
2.30

Reqd.
for
Sat’n.
of aCu-
bie Ft.
of Air.

gr.
0.0

0.44
0.84
1.23
1.60
1.96
2.29

2.63
2.94
3.23
3.52
3.50
4.05
4.29

4.52
4.75
4.96
5.18
5.38
5.56
5.72

5.89
6.05
6.21
6.35
6.49
6.62
6.74

0.00
0.44
0.86
1.26
1.64
2.01
2.36

2.69
3.01
3.62
3.89
4.16
4.41

Hu-
midity,
Satura-

Weight in Grains of a Cubic Foot of Air. |

tion =

1.000.

1.000
0.951
0.907
0.864
0.823
0.783
0.747

0.709
0.675
0.643
0.611
0.580
0.552
0.525

0.500
0.475
0.451
0.427
0.405
0.385
0.367

0.348
6.331
0.313
0.298
0.282
0.268
0.254

1.000
0.953
0.908
0.865
0.824
0.784
0.746

0.711
0.677
0.643
0.611
0.582
0.553

| 0.526

Height of the Barometer in English Inches.

in. in.
28.0 23.5

gr.
486.9

487.1
4187.3
487.5
487.7
487.9
488.1

gr.
478.4

478.6
478.8
479.0
479.2
479.4
479.6

488.3
488.5
488.7
488.9

479.8
480.0
480.1
480.3
480.5 | 489.1
480.6 | 489.2
480.7 | 489.5

480.9 | 489.5
481.0 | 489.6
481.1 | 489.7
481.2 | 489.8
481.3 | 489.9
481.4 | 490.0
481.5 | 490.1

490.2
490.3
490.4
490.5
490.5
490.6
490.7

481.6
481.7
481.8
481.9
481.9
482.0
482.1

485.9
486.1
486.3
486.5
456.7
486.8
487.0

477.4
477.6
477.8
478.0
478.2
478.3
478.5

478.7
478.9
479.1
479.3
479.5
479.6
479.7

eee es
DO DH
tn

-
oO Ww
am s-t

488.

ya SohHaLN

on
wo
_—

in.
29.0

gr.
495.5
495.7
495.9
496.1
496.3
496.5
496.7

496.9
497.1
497.5
497.5
497.7
497.8
497.9

498.1
498.2
498.3
498.4
498.5
498.6
498.7

498.8
498.9
499.0
499.1
499.1
499.2
499.2

494.4
494.6
494.8
495.0
495.2
495.3
495.5

| 495.7 |

495.9
496.1
496.4
496.6
496.7 |

| 496.8

in. in.
29.5 30.0

gr.
504.0

504.2
504.4
504.6
504.8
505.0
505.2

505.4
505.6
505.9
506.1
506.3
506.4
506.5

506.7
506.8
506.9
507.0
507.1
507.2
507.3

507.4
507.5
507.6
507.7
507.7
507.8
507.9

502.9
503.1
503.3
503.5
503.7
503.8
504.0

504.2
504.4
504.6
504.9
505.1
505.2
3

ro

0
0

o
or ou

oU-

gr.
912.6
512.8
513.0
513.2
513.4
513.6
513.8

514.0
514.2
514.4
514.6
514.8
514.9
515.0

515.2
515.3
515.4
515.5
515.6
515.7
515.8

515.9
516.0
516.1
516.2
516.2
516.3
516.4

511.5
511.7
511.9
512.1
512.3
512.5
512.7

512.9
| 513.1
| 513.3
513.5

513.7 |

| 513.8
513.9

in.
(30.5

In.
31.0

gr. gr.
521.1 | 529.7
521.3 | 529.9
521.5 | 530.1
521.7 | 530.3
521.9 | 530.5
522.1 | 530.7
522.3 | 530.9

522.5
522.7
522.9
523.2
525.4
523.5
523.6

531.1
531.3
531.5
531.8
532.0
532-1
532.2

523.8
523.9
524.0
524.1
524.2
524.3
524.4

532.4
532.5
532.6
532.7
532.8
532.9
533.0

533.1
533.2
533.3
533.4
533.4
533.5
533.6

524.5
524.6
524.7
524.8
524.8
524.9
525.0

520.0
520.2
520.4
520.6
520.8
521.0
521.2

528.5
528.7
528.9
529.1
529.3
529.5
529.7

529.9
530.1
530.3
530.6
530.8
530.9
531.0

521.4
521.6
521.8
522.0
522.2
522.3
522.4

5 a a a

PSYCHROMETRICAL TABLES. 165

| ; Weight
Reading §
of Ther- ||Temp | Force eaWvarur Hu-

Weight in Grains of a Cubic Foot of Air.

moneter, of of Reqd. | midity, ; 7 a
Fabr. Dew- | Vapor | Ina for | satura- Height of the Barometer in English Inches. ,
Point in Cubic | Sat’n. | tion —
Fahr. | English Foot of ofaCu-) 7 999 i] 3 i J : 4 ;
“| Inches. | Air. | bie Ft. i 5 ln. in. in. In. in. | in. in.
vof Air. 28.0 28.5 29.0 29.5 30.0 30.5 31.0
_ ——— |
in. gr gr. gr gr gr. gr. gr. gr ‘gr.

5 | 0.450 | 4.90 | 4.41 | 0.526 | 479.7 | 488.2 | 496.8 | 505.3 | 513.9 | 522.4 | 531.0
.0 | 0.428 | 4.66 | 4.65 | 0.501 | 479.9 | 488.4 | 497.0 | 505.5 | 514.1 | 522.6 | 531.2
5 | 0.407 | 4.43 | 4.88 | 0.476 | 480.0 | 488.5 | 497.1 | 505.6 | 514.2 | 522.7 | 531.3
0 | 0.386 | 4.21 | 5.10 | 0.452 | 480.1 | 488.6 | 497.2 | 505.7 | 514.3 | 522.8 | 531.4
5 | 0.367 | 4.00 31 | 0.429 | 480.3 | 488.8 | 497.4 | 505.9 | 514.5 | 523.0 | 531.6
48.0 | 0.349 | 3.79 | 5.52 | 0.407 | 480.4 | 488.9 | 497.5 | 506.0 | 514.6 | 523.1 | 531.7
46.5 | 0.331 | 3.60 71 | 0.387 | 480.5 | 489.0 | 497.6 | 506.1 | 514.7 | 523.2 | 531.8

or or or

45.0 | 0.315 | 3.42 | 5.89 | 0.367 | 480.6 | 489.1 | 497.7 | 506.2 | 514.8 | 523.3 | 531.9
43.5 | 0.299 | 3.25 | 6.06 | 0.349 | 480.7 | 489.2 | 497.8 | 506.3 | 514.9 | 523.4 | 532
42.0 | 0.283 | 3.09 | 6.22 | 0.332 | 480.8 | 489.3 | 497.9 | 506.4 | 515.0 | 523.5 | 532.1
| 40.5 | 0.269 | 2.93 | 6.38 | 0.315 | 480.8 | 489.3 | 497.9 | 506.4 | 515.0 | 523.5 | 532.1
39.0 | 9.255 | 2.78 | 6.53 | 0.299 | 480.9 | 489.4 | 498.0 | 506.5 | 515.1 | 523.6 | 532.2
37.5 | 0.242 | 2.64 | 6.67 | 0.284 | 481.0 | 489.5 | 498.1 | 506.6 | 515.2 | 523.7 | 5
36.0 | 0.230 | 2.51 | 6.80 | 0.270 | 481.1 | 489.6 | 498.2 | 506.7 | 515.3 | 523.8 | 5
34.5 | 0.218 | 2.39 | 6.92 | 0.257 | 481.2 | 489.7 | 498.3 | 506.8 | 515.4 | 523.9 | 532.

493.3 | 501.8 | 510.3 | 518.8 | 527.3
493.6 | 502.1 | 510.6 | 519.1 | 527.6
493.8 | 502.3 | 510.8 | 519.3 | 527.8
494.0 | 502.6 | 511.1} 519.6 | 528.1
494.3 | 502.8 | 511.3 | 519.8 | 528.3
494.5 | 503.0 | 511.5 | 520.0 | 528.5
494.7 | 503.2 | 511.7 | 520.2 | 528.7

494.9 | 503.4 | 511.9 | 520.4 | 528.9
495.0 | 503.6 | 512.1 | 520.6 | 529.2
465.2 | 503.8 | 512.3 | 520.8 | 529.4
495.3 | 503.9 | 512.4 | 520.9 | 529.5
495.4 | 504.0 | 512.5 | 521.0 | 529.6
495.6 | 504.2 | 512.7 | 521.2 | 529.8
495.7 | 504.3 | 512.8 | 521.3 | 529.9

495.9 | 504.5 | 513.0} 521.5 | 530.1
496.1 | 504.7 | 513.2 | 521.7 | 530.3 |
496.2 | 504.8 | 513.3 | 521.8 | 530.4
496.3 | 504.9 | 513.4] 521.9 | 530.5
496.4 | 505.0 | 513.5 | 522.0 ! 530.6
496.5 | 505.1 | 513.6 | 522.1 | 530.7 |;
496.6 | 505.2 | 513.7| 522.2 | 530.8

496.7 | 505.3 | 513.8 | 522.3
496.8 | 505.4 | 513.9 | 522.4
496.9 | 505.5 | 514.0 | 522.5
497.0 | 505.6 | 514.1 | 522.6
497.1 | 505.7 | 514.2 | 522.7
497.2 | 505.8 | 514.3 | 522.8
497.3 | 505.9 | 514.4] 522.9

B 129

166

Reading

of Ther-

mometer,
Fahr.

Dry.| Wet.

o °
Oa ad,

~I
w

Temp.
of
Dew-
Point,
Fahr.

°
77.0
75.5
74.0
72.5
71.0
69.5
68.0

66.5
65.0
63.5
62.0
60.5
59.0
57.5

56.0
54.5
53.0
51.5
50.0
48.5
47.0

45.5
44.0
42.5
41.0
39.5
38.0
36.5

arvwrn st
CcConwnnwan ®
ououo na oan &

a
st
oO

66.0
64.5
63.0
61.5
60.0
58.5

PSYCHROMETRICAL TABLES.

Weight

of V

Ina
Cubic

English | Foot of

Inches.

in,
0.910
0.868
0.827
0.787
0.751
0.715
0.681

0.648
0.617
0.588
0.559
0.532
0.506
0.481

0.458
0.435
0.414
0.393
0.373
0.355
0.337

0.320
0.304
0.288
0.274
0.260
0.246
0.234

0.940
0.896
0.854
0.814
0.776
0.739
0.704

0.670
0.638
0.607
0.57

0.550
0.523
0.498

Air.

gr.
9.89

9.42
8.99
8.57
8.15
7.77
7.40

7.04
6.71
6.37
6.06
5.77
5.49
5.21

4.96
4.70
4.49
4.26
4.05
3.85
3.65

3.47
3.29
3.13
2.97
2.82
2.67
2.53

10.19
9.72
9.25
8.82
8.40
8.00

=
aS
— OV bo

DROx
D

ou
aS

a

ou
woawenwu © ww
a

ou
wm

apor
Reqd.
for
Sat’n.
of aCu-
bic Ft.
of Air.

gr.
0.00

0.47
0.90
1.32
1.74
2.12
2.49

2.85
3.18
3.52
3.83

4.12
4.40
4.68

4.93
5.19
5.40
5.63
5.84
6.04
6.24

6.42
6.60
6.76
6.92
7.07
Tene
7.36

0.00
0.47
0.94
1.37
1.79
19

i

to
On
~

— De

w

oo

Dononnw sos
w

—

Hu-
midity,
Satura-
tion =

1.000.

1.000
0.953
0.909
0.867
0.824
0.786
0.748

0.712
0.678
0.644
0.613
0.583
0.556
0.527

0.501
0.476
0.454
0.431
0.410
0.389
0.369

0.351
0.333
0.317
0.301
0.235
0.270
0.256

1.000
0.954
0.908
0.865
0.824
0.785
0.748

0.711
0.678
0.616
0.614
0.585
0.555
0.528

Weight in Grains of a Cubic Foot of Air.

474.1
474.4
474.7
474.9
475.2
475.4
475.6

475.5
475.9
476.1
4176.3
476.4
176.6
476.8

15

Height of the Barometer in English Inches.

in.
28.5

gr. gr.

483.8 | 492.3
484.0 | 492.5
484.2 | 492.7
484.4 | 492.9
484.6 | 493.1
484.8 | 493.3
485.0 | 493.5

485.2 | 493.7
485.4 | 493.9
485.6 | 494.1
485.8 | 494.3
486.0 | 494.5
486.1 | 494.6
486.3 | 494.8

486.5 | 495.0
486.6 | 495.1
486.6 | 495.1
486.7 | 495.2
486.8 | 495.3
486.9 | 495.4
487.1 | 495.6

487.2 | 495.7
487.3 | 495.8
487.4 | 495.9
487.5 | 496.0
487.6 | 496.1
457.7 | 496.2
487.7 | 496.2

482.5 | 491.0
482.9 | 491.4
483.2 | 491.6
485.4 | 491.8
483.7 | 492.1
483.9 | 492.3
484.1 | 492.5

484.3 | 492.7
484.4 | 492.9
484.6 | 493.1
484.8 | 493.3

484.9 | 493.4 |

485.1 | 493.6
485.3 | 493.8

in. | in.
29.0 | 29.5

gr.
500.8

501.0
501.2
501.4
501.6
501.8
502.0

502.2
502.4
502.6
502.8
503.0
503.1
503.3

503.5
503.7
503.7
503.8
503.9
504.0
504.1

504.2
504.3
504.4
504.5
504.6
504.7
504.7

499.4
499.9
500.1
500.3
500.6
500.8
501.0

501.2
501.4
501.6
501.8
501.9
502.1
502.3

512.0
512.1
512.2
512.3
512.4
512.5
512.7

512.8
512.9
513.0
513.1
513.2
513.3
513.3

508.0
508.3
508.6
508.8
509.1
500.3
509.5

509.7
509.9
510.1
510.3
510.4
510.6
510.8

gr.
517.

517.9
518.1
518.4
518.6
518.8
519.0

519.2
519.4
519.6
519.8
520.0
520.1
520.3

520.5
520.6
520.7
520.8
520.9
521.0
521.2

521.3
521.4
521.5
521.6
521.7
521.8
521.8

516.4
516.7
517.1
517.3
517.6
517.8
518.0

518.2
518.4

515.6 |

518.8
518.9
519.1
519.3

gr.
526.2 ||

1
|
|
526.4 ||
526.6 |
526.9 ||
527.1
527.3
527.5

527.7
527.9
528.1
528.3
528.5
528.6
528.8

529.0
529.1
529.3
529.4
529.5
529.6
529.8

529.9
530.0
530.1
530.2
530.3
530.4
530.4

PSYCHROMETRICAL TABLES.

0.970
0.925
0.882
0.840
0.801
0.763
0.727

0.692
0.659
0.628
0.597
0.568
0.541
0.515

0.489
0.465
0.442
0.421
0.400
0.380
0.361

0.343
0.326
0.309
0.293
0.279
0.264

10.50
10.01
9.54
9.10
8.66
8.25
7.86

7.48
7.12
6.79
6.45
6.14
5.84
5.55

5.28
5.02
4.78
4.54
4.31
4.10
3.90

3.71
3.52
3.34
3.17]
3.01
2.86.

Weight

of Vapor

Ina for
Cubic | Sat’n.
Foot of

Air. |bie Ft.

gr. gr.
5.38| 4.81
5.12) 5.07
4.88] 5.31
4.63) 5.56
4.40
4.18) 6.01
3.98| 6.21

3.78) 6.41
3.59
3.41
3.24
3.07
2.92
2.97
2.63

6.60
6.78
6.95
7.12
7.27
7.42
7.56

0.00
0.49
0.96
1.40
1.84
2.25
2.64

3.02
3.38
3.71
4.05
4.36
4.66
4.95

5.22
5.48
5.72
5.96
6.19
6.40
6.60

6.79
6.98
7.16
7.33
7.49
7.64
2.72) 7.78

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

gr.

476.8
476.8
476.9
477.1
477.2
477.3
477.4

477.5
477.6
477.8
477.9
478.0

478.1

478.2
478.3

473.1
473.4
473.7
473.8
474.0
474.3
474.5

A7A.7
474.9

475.1

475.3
475.4
475.6
475.7

475.8
476.0
476.1
476.3
476.4
476.5
476.6

476.7
476.8
476.9
477.0

477.1

477.2
477.3

in.
28.5

gr.
485.3
485.3
485.4
485.6
485.7
485.8
485.9

486.0
486.1
486.3
486.4
486.5
486.5
486.6
486.7

481.5
481.8
482.1
482.2
482.4
482.7
482.9

483.1
483.4
483.6
483.8
483.9
484.1
484.2

484.3
484.5
484.6
484.8
484.9
485.0
485.1

485.2
485.3
485.4
485.5
485.6

485.7 |

485.8

in.
29.5

gr.

502.3
502.4
502.5
502.7
502.8
502.9
503.0

503.1
503.2
503.3
503.4
503.5
503.5
503.6
503.7

498.4
498.7
499.0
499.2
499.4
499.7
499.9

500.1
500.4
500.6
500.8
500.9
501.1
501.2

501.3
501.5
501.6
501.8
501.9
502.0
502.1

oO
o

ou

oS
wr by hm Ww bw bv
. . . . . . .
Dar Oe Ww WH

on
S a)

or or
S

oS

in. in.
30.0) 30.5

gr. gr.

510.8 | 519.3
510.9 | 519.4
511.0 | 519.5
511.2 | 519.7
511.3 | 519.8
511.4 | 519.9
511.5 | 520.0

511.6 | 520.1
511.7 | 520.2
511.9 | 520.4
512.0 | 520.5
512.1 | 520.6
512.1 | 520.6
512.2 | 520.7
512.3 | 520.8

506.9 | 515.3
507.2 | 515.6
507.5 | 515.9
507.7 | 516.2
507.9 | 516.4
508.2 | 516.7
508.4 | 516.9

508.6 | 517.1
508.8 | 517.3
509.0 | 517.5
509.2 | 517.7
509.3 | 517.8
509.5 | 518.0
509.6 | 518.1

509.8 | 518.3
510.0 | 518.5
510.1 | 518.6
510.3 | 518.8
510.4 | 518.9
510.5 | 519.0
510.6 | 519.1

510.7 | 519.2
510.8 | 519.3
510.9 | 519.4
511.0} 519.5
511.1 | 519.6
511.2 | 519.7
511.3 | 519.8

gr.
527.8
527.9
528.0
528.2
528.3
528.4
528.5

528.6
528.7
528.9
529.0
529.1
529.1
529.2
529.3

523.8 ||
524.1
524.4
524.7
524.9
525.2
525.4

527.7
527.8
527.9
528.0
528.1
528.2
528.3

131

168 PSYCHROMETRICAL ‘TABLES.
Reading nein Weight in Grains of a Cubic Foot of Air. |
of Ther- || Temp.| Force |_° *®P0r Hu- |
mometer, of cee Ina Reale midity, ; i 3 Weetenieei
Fahr. Dew- ap: D Satura- Height of the Barometer in English Inches }
Point in Cubic | Sat’n. | tion eee
——— || Pah’ | English | Foot of] ofaCu- 1.000. : i : ‘ : : 4
Inches.| Air. |bic Ft. in. in. in. in. in. in. in.
bry. Wet. of Air. 28.0 /28.5 |29.0 | 29.5 30.0 /30.5 31.0
° ° ° in. gr gr. gr. gr. gr. gr. gr. gr. gr
80 | 80 | 80.0} 1.001 | 10.81) 0.00 | 1.000 | 472.0 | 480.4 | 488.9 | 497.3 | 505.7 | 514.1 | 522.6
79 78.5 | 0.955 | 10.31) 0.50 | 0.954 | 472.3 | 480.7 | 489.1 | 497.5 | 506.0 | 514.4 | 522.9
78 77.0 | 0.910 | 9.83] 0.98 | 0.909 | 472.5 | 480.9 | 489.4 | 497.9 | 506.3 | 514.7 | 523.2
77 75.5 | 0.868 | 9.37] 1.44 | 0.867 | 472.7 | 481.1 | 489.6 | 498.1 | 506.5 | 514.9 | 523.4
76 74.0 | 0.827 | 8.93] 1.88 | 0.826 | 473.0 | 481.4 | 489.9 | 498.4 | 506.8 | 515.2 | 523.7
| 75 72.5 | 0.787 | 8.50) 2.31 | 0.786 | 473.2 | 481.6 | 490.1 | 498.6 | 507.0 | 515.4 | 523.9
74 71.0 | 0.751 | 8.11} 2.70 | 0.750 | 473.4 | 481.8 | 490.3 | 498.8 | 507.2 | 515.6 | 524.1
73 69.5 | 0.715 | 7.71| 3.10 | 0.713 | 473.6 | 482.1 | 490.6 | 499.1 | 507.5 | 515.9 | 524.4
72 || 68.0 | 0.681 | 7.35) 3.46 | 0.680 | 473.8 | 482.3 | 490.8 | 499.3 | 507.7 | 516.1 | 524.6
71 || 66.5 | 0.648 | 6.99| 3.82 | 0.647 | 474.0 | 482.5 | 491.0 | 499.5 | 507.9 | 516.3 | 524.8 ||
70 65.0 | 0.617 | 6.66] 4.15 | 0.616 | 474.2 | 482.7 | 491.2 | 499.7 | 508.1 | 516.5 | 525.0
69 63.5 | 0.588 | 6.33] 4.48 | 0.586 | 474.4 | 482.9 | 491.4 | 499.9 | 508.3 | 516.7 | 525.2
68 62.0 | 0.559 | 6.03] 4.78 | 0.558 | 474.5 | 483.0 | 491.5 | 500.0 | 508.4 | 516.8 | 525.3 |
67 60.5 | 0.532 | 5.74] 5.07 | 0.531 | 474.7 | 483.2 | 491.7 | 500.2 | 508.6 | 517.0 | 525.5
66 59.0 | 0.506 | 5.45] 5.36 | 0.504 | 474.9 | 483.4 | 491.9 | 500.4 | 508.8 | 517.2 | 525.7 |
65 57.5 | 0.481 | 5.18} 5.63 | 0.479 | 475.0 | 483.5 | 492.0 | 500.5 | 508.9 | 517.3 | 525.8 |
64 56.0 | 0.458 | 4.93] 5.96 | 0.456 | 475.2 | 483.7 | 492.2 | 500.7 | 509.1 | 517.5 | 526.0 |,
63 54.5 | 0.485 | 4.69] 6.12 | 0.434 | 475.3 | 453.8 | 492.3 | 500.8 | 509.2 | 517.6 | 526.1 |
62 53.0 | 0.414 | 4.46] 6.35 | 0.413 | 475.4 | 483.9 | 492.4 | 500.9 | 509.3 | 517.7 | 526.2
61 51.5 | 0.393 | 4.23) 6.58 | 0.391 | 475.5 | 484.0 | 492.5 | 501.0 | 509.4 | 517.8 | 526.3
60 50.0 | 0.373 | 4.02] 6.79 | 0.372 | 475.6 | 484.1 | 492.6 | 501.1 | 509.5 | 517.9 | 526.4 |
59 48.5 | 0.355 | 3.82] 6.99 | 0.353 | 475.7 | 484.2 | 492.7 | 501.2 | 509.6 | 518.0 | 526.5
58 47. 0.337 | 3.63] 7.18 | 0.336 | 475.9 | 484.4 | 492.9 | 501.4 | 509.8 | 518.2 | 526.7 |
57 45.5 | 0.320 | 3.45) 7.36 | 0.319 | 476.0 | 484.5 | 493.1 | 501.5 | 509.9 | 518.3 | 526.8
56 44. 0.304 | 3.27] 7.54 | 0.302 | 476.1 | 484.6 | 493.2 | 501.6 | 510.0 | 518.4 | 526.9
55 42.5 | 0.288 | 3.11] 7.70 | 0.288 | 476.2 | 484.7 | 493.3 | 501.7 | 510.1 | 518.5 | 527.0
54 41.0 | 0.274 | 2.96) 7.85 | 0.274 | 476.3 | 484.8 | 493.4 | 501.8 | 510.2 | 518.6 | 527.1
53 39.5 | 0.260 | 2.82] 7.99 | 0.261 | 476.3 | 484.8 | 493.4 | 501.8 | 510.2 | 518.6 | 527.1
81} 81 81.0 | 1.034 | 11.14} 0.00 | 1.000 | 471.0 | 479.4 | 487.8 | 496.2 | 504.6 | 513.0 | 521.4
80 79.5 | 0.986 | 10.62) 0.52 | 0.953 | 471.3 | 479.7 | 488.1 | 496.5 | 504.9 | 513.3 | 521.7
79 78.0 | 0.940 | 10.13] 1.01 | 0.910 | 471.5 | 479.9 | 488.4 | 496.8 | 505.2 | 513.6 | 522.1
78 76.5 | 0.896 | 9.65] 1.49 | 0.866 | 471.7 | 480.1 | 488.6 | 497.0 | 505.4 | 513.8 | 522.3
a 75.0 | 0.854 | 9.20] 1.94 | 0.826 | 472.0 | 480.4 | 488.9 | 497.3 | 505.7 | 514.1 | 522.6
| 76 73.5 | 0.814 | 8.77] 2.37 | 0.787 | 472.2 | 480.6 | 489.1 | 497.5 | 505.9 | 514.3 | 522.8
75 72.0 | 0.776 | 8.35) 2.79 | 0.750 | 472.5 | 480.9 | 489.4 | 497.8 | 506.2 | 514.6 | 523.1
74 70.5 | 0.739 | 7.95) 3.19 | 0.713 | 472.6 | 481.0 | 489.5 | 497.9 | 506.4 | 514.8 | 523.3
73 69.0 | 0.704 | 7.57) 3.57 | 0.680 | 472.8 | 481.2 | 489.7 | 498.1 | 506.6 | 515.0 | 523.5
72 67.5 | 0.670 | 7.21] 3.93 | 0.647 | 473.0 | 481.4 | 489.9 | 498.3 | 506.8 | 515.2 | 523.7
|| 71 66.0 | 0.638 | 6.87) 4.27 | 0.617 | 473.2 | 481.6 | 490.1 | 498.5 | 507.0 | 515.4 | 522.9
70 64.5 | 0.607 | 6.54] 4.60 | 0.587 | 473.4 | 481.8 | 490.3 | 498.7 | 507.2 | 515.6 | 524 1
| 69 || 63.0 | 0.578 | 6.22] 4.92 | 0.558 | 473.6 | 482.0 | 490.5 | 498.9 | 507.4 | 515.8 | 524.3
lL | 68 | 61.5 | 0.550 | 5.92) 5.22 | 0.531 | 473.7 | 482.2 | 490.7 | 499.1 | 507.6 | 516.0 524.5 |
B 132

PSYCHROMETRICAL TABLES. 169

Weight,

eels ee of Vapor on Weight in Grains of a Cubic Foot of Air.
Gr sel acaol Reqd. | midity,
Dew- | Vapor | Ina | for | gatura- Height of the Barometer in English Inches.

Cubic | Sat’n.

ne English Foot of ofaCu Hon |
Hane: Inches.| Air. |bic Ft. 1.000. in. in.

in. in. in. in. in.
of Air. 28.0) 28.3/ 29.0/ 29.5/| 30.0) 30.5) 31.0

° in. gr. gr. gr. gr. gr. gr. gr. gr. gr.
61.5 | 0.550 | 5.92) 5.22 | 0.531 | 473.7 | 482.2 | 490.7 | 499.1 | 507.6 | 516.0 | 524.5
60.0 | 0.523 | 5.62) 5.52 | 0.505 | 473.8 | 482.3 | 490.8 | 499.2 | 507.7 | 516.1 | 524.6
58.5 | 0.498 | 5.31) 5.83 | 0.477 | 474.0 | 482.5 | 491.0 | 499.4 | 507.9 | 516.3 | 524.8 |
57.0 | 0.473 | 5.08) 6.06 | 0.456 | 474.1 | 482.6 | 491.1 | 499.5 | 508.0 | 516.4 | 524.9
55.5 | 0.450] 4.84) 6.30 | 0.434 | 474.3 | 482.8 | 491.3 | 499.7 | 508.2 | 516.6 | 525.1
54.0 | 0.428 | 4.60) 6.54 | 0.413 | 474.4 | 482.9 | 491.4] 499.8 | 508.3 | 516.7 | 525.2
52.5 | 0.407 | 4.37) 6.77 | 0.392 | 474.5 | 483.0 | 491.5.| 499.9 | 508.4] 516.8 | 525.3

51.0 | 0.886 | 4.15) 6.99 | 0.373 | 474.6 | 483.1 | 491.6 | 500.0 | 508.5 | 516.9 | 525.
49.5 | 0.367 | 3.95] 7.19 | 0.355 | 474.7 | 483.2 | 491.7 | 500.1 | 508.6 | 517.0 | 525.
48.0 | 0.349 | 3.75] 7.39 | 0.337 | 474.9 | 483.4 | 491.9 | 500.3 | 508.8 | 517.2 | 525
46.5 | 0.331 | 3.56| 7.58 | 0.320 | 475.0 | 483.5 | 492.0 | 500.4 | 508.9 | 517.3 | 525.
45.0 | 0.315 | 3.38] 7.76 | 0.303 | 475.1 | 483.6 | 492.1 | 500.5 | 509.0 | 517.4 | 525
43.5 | 0.299 | 3.21) 7.93 | 0.289 | 475.2 | 483.7 | 492.2 | 500.6 | 509.1 | 517.5 | 526.
42.0 | 0.283 | 3.05) 8.09 | 0.274 | 475.3 | 483.8 | 492.3 | 500.7 | 509.2 | 517.6 | 526.1
40.5 | 0.269 | 2.90) 8.24 | 0.260 | 475.3 | 483.8 | 492.3 | 500.7 | 509.2 | 517.6 | 526.1

© Oo

82.0 | 1.067 | 11.47] 0.00 | 1.000 | 470.0 | 478.4 | 486.8 | 495.2 | 503.5 | 511.9 | 520.3
80.5 | 1.017 | 10.94) 0.53 | 0.954 | 470.3 | 478.7 | 487.0 | 495.4 | 503.8 | 512.2 | 520.6
79.0 | 0.970 | 10.44} 1.03 | 0.910 470.6 | 479.0 | 487.3 | 495.7 | 504.1 | 512.5 | 520.9
77.5 | 0.925 | 9.95] 1.52 | 0.868 | 470.7 | 479.1 | 487.5 | 495.9 | 504.3 | 512.7 | 521.1
76.0 | 0.882 | 9.49) 1.98 | 0.827 | 471.0 | 479.4 | 487.8 | 496.2 | 504.6 | 513.0 | 521.4
74.5 | 0.840 | 9.03} 2.44 | 0.787 | 471.2 | 479.6 | 488.0 | 496.4 | 504.8 | 513.2 | 521.6
73.0 | 0.801 | 8.60} 2.87 | 0.750 | 471.5 | 479.9 | 488.3 | 496.7 | 505.1 | 513.5 | 521.9

71.5 | 0.763 | 8.19) 3.28 | 0.714 | 471.6 | 480.0 | 488.5 | 496.9 | 505.3 | 513.7 | 522.1
70.0 | 0.727 | 7.81] 3.66 | 0.681 | 471.8 | 480.2 | 488.6 | 497.1 | 505.5 | 513.9 | 522.4
68.5 | 0.692 | 7.43) 4.04 | 0.648 | 472.0 | 480.4 | 488.8 | 497.3 | 505.7 | 514.1 | 522.6
67.0 | 0.659 | 7.08] 4.39 | 0.618 | 472.2 | 480.6 | 489.0 | 497.5 | 505.9 | 514.3 | 522.8
65.5 | 0.628 | 6.75] 4.72 | 0.588 | 472.4 | 480.8 | 489.2 | 497.7 | 506.1 | 514.5 | 523.0
64.0 | 0.597 | 6.41] 5.06 | 0.559 | 472.5 | 480.8 | 489.4 | 497.9 | 506.3 | 514.7 | 523.2
62.5 | 0.568 | 6.10) 5.37 | 0.532 | 472.6 | 481.0 | 489.5 | 498.0 | 506.4 | 514.8 | 523.3

59.5 | 0.515 | 5.52) 5.95 | 0.481 | 473.0 | 481.4] 489.9 | 498.4 | 506.8 | 515.2 | 523.7
58.0 | 0.489 | 5.25) 6.22 | 0.458 | 473.1 | 481.5 | 490.0 | 498.5 | 506.9 | 515.3 | 523.8
56.5 | 0.465 | 4.99) 6.48 | 0.435 | 473.2 | 481.6 | 490.1 | 498.6 | 507.0 | 515.4 | 523.9
55.0 | 0.442 | 4.75) 6.72 | 0.414 | 473.4 | 481.8 | 490.3 | 498.8 | 507.2 | 515.6 | 524.1
53.5 | 0.421 | 4.51) 6.96 | 0.393 | 473.5 | 482.0 | 490.5 | 499.0 | 507.4 | 515.8 | 524.3
52.0 | 0.100 | 4.29) 7.18 | 0.374 | 473.6 | 482.1 | 490.6 | 199.1 | 507.5 | 515.9 | 524.4

61.0 | 0.541 | 5.81} 5.66 | 0.507 | 472.8 | 481.2 | 489.7 | 198.2 | 506.6 | 515.0 | 523.5
4

or

50.5 | 0.380 | 4.08) 7.39 | 0.356 | 473.7 | 482.2 | 490.7 | 499.2 | 507.6 | 516.0 | 524.4
49.0 | 0.361 | 3.87) 7.60 | 0.337 | 473.8 | 482.3 | 490.8 | 499.3 | 507.7 | 516.1 | 524.5
47.5 | 0.343 | 3.68) 7.79 | 0.320 | 473.9 | 482.4 | 490.9 | 499.4 | 507.8 | 516.2 | 524.6

46.0 | 0.326 | 3.50) 7.97 | 0.305 | 474.0 | 482.5 | 491.0 | 499.5 | 507.9 | 516.3 | 524.7
44.5 | 0.309 | 3.32) 8.15 | 0.289 | 474.1 | 482.6 | 491.1 | 499.6 | 508.0 | 516.4 | 524.8
43.0 | 0.293 | 3.15) 8.32 | 0.274 | 474.2 | 482.7 | 491.2 | 499.7 | 508.1 | 516.5 | 524.9
41.5 | 0.279 | 2.99) 8.48 | 0.260 | 474.3 | 482.5 | 491.3 | 499.8 | 508.2 | 516.6 | 525.1 |

B 153

PSYCHROMETRICAL TABLES.

Reading Weight Weight in Grains of a Cubic Foot of Air.
of Ther- || Temp.| Force er ra
mometer, of of Reqd. | midity, 5 : :
Fahr. Dew- | Vapor | Ina | for | gatura- Height of the Barometer in English Inches.
Point in Cubic | Sat’n. | tion = aus
a Fabr, | English Foot of ofaCu-) 7 999, 2 [are at ae : :
Inches. | Air. |bic Ft in. in. in. in. in. in. in.
Dry.| Wet. | of Air 28.0 28.5 |/29.0 29.5 30.0 30.5 | 31.0
° ° ° in. gr gr. gr. gr. gr. gr. gr. gr.* gr.
83 | 83 || 83.0 | 1.101 | 11.82] 0.00 | 1.000 | 468.8 | 477.2 | 485.5 | 493.9 | 502.3 | 510.6 | 519.0
82 || 81.5 | 1.050 | 11.27) 0.55 | 0.953 | 469.1 | 477.5 | 485.8 | 494.2 | 502.6 | 511.0 | 519.4
81 80.0 | 1.001 | 10.75| 1.07 | 0.909 | 469.4 | 477.8 | 486 1 | 494.5 | 502.9 | 511.3 | 519.7
80 || 78.5 | 0.955 | 10.25) 1.57 | 0.868 | 469.7 | 478.1 | 486.4 | 494.8 | 503.2 | 511.6 | 520.0
79 || 77.0 | 0.910 | 9.78} 2.04 | 0.828 | 470.0 | 478.4 | 486.7 | 495.1 | 503.5 | 511.9 | 520.3
78 75.5 | 0.868 | 9.31) 2.51 | 0.786 | 470.3 | 478.7 | 487.0 | 495.4 | 503.8 | 512.2 | 520.6
77:«*|| 74.0 | 0.827 | 8.88) 2.94 | 0.751 | 470.5 | 478.9 | 487.2 | 495.6 | 504.0 | 512.4 | 520.8
76 || 72.5 | 0.787 | 8.45) 3.37 | 0.715 | 470.6 | 479.0 | 487.4 | 495.8 | 504.2 | 512.6 | 521.0
75 || 71.0 | 0.751 | 8.05) 3.77 | 0.681 | 470.8 | 479.2 | 487.6 | 496.0 | 504.4 | 512.8 | 521.2
74 || 69.5 | 0.715 | 7.66) 4.16 | 0.647 | 471.0 | 479.4 | 487.8 | 496.2 | 504.6 | 513.0 | 521.4
73 || 68.0 | 0.681 | 7.30] 4.52 | 0.618 | 471.2 | 479.6 | 488.0 | 496.4 | 504.8 | 513.2 | 521.6
72 || 66.5 | 0.648 | 6.95) 4.87 | 0.588 | 471.4 | 479.8 | 488.2 | 496.6 | 505.0 | 513.4 | 521.8
71 65.0 | 0.617 | 6.62} 5.20 | 0.560 | 471.6 | 480.0 | 488.4 | 496.8 | 505.2 | 513.6 | 522.0
70 || 63.5 | 0.588 | 6.29) 5.53 | 0.533 | 471.7 | 480.1 | 488.5 | 497.0 | 505.4 | 513.8 | 522.3
69 || 62.0 | 0.559 | 5.99] 5.83 | 0.507 | 471.9 | 480.3 | 488.7 | 497.2 | 505.6 | 514.0 | 522.5
68 |] 60.5 | 0.532 | 5.70) 6.12 | 0.482 | 472.0 | 480.4 | 488.8 | 497.3 | 505.7 | 514.1 | 522.6 ||
67 || 59.0 | 0.506 | 5.42] 6.40 | 0.459 | 472.2 | 480.6 | 489.0 | 497.5 | 505.9 | 514.3 | 522.8 |
66 || 57.5 | 0.481 | 5.15) 6.67 | 0.435 | 472.4 | 480.8 | 489.2 | 497.7 | 506.1 | 514.5 | 523.0
65 || 56.0 | 0.458 | 4.90] 6.92 | 0.414 | 472.4 | 480.8 | 489.3 | 497.8 | 506.2 | 514.6 | 523.1
64 54.5 | 0.435 | 4.66] 7.18 | 0.394 | 472.5 | 480.9 | 489.4 | 497.9 | 506.3 | 514.7 | 523.2
63 || 53.0 | 0.414 | 4.43] 7.39 | 0.375 | 472.7 | 481.1 | 489.6 | 498.1 | 506.5 | 514.9 | 523.4
62 || 51.5 | 0.393 | 4.21] 7.61 | 0.356 | 472.8 | 481.2 | 489.7 | 498.2 | 506.6 | 515.0 | 523.5 ||
61 50.0 | 0.373 | 4.00] 7.82 | 0.339 | 472.9 | 481.3 | 489.8 | 498.3 | 506.7 | 515.1 | 523.6
60 || 48.5 | 0.355 | 3.80] 8.02 | 0.322 | 473.1 | 481.4 | 489.9 | 498.4 | 506.8 | 515.2 | 523.7
59 || 47.0 | 0.337 | 3.60) 8.22 | 0.305 | 473.2 | 481.5 | 490.0 | 498.5 | 506.9 | 515.3 | 523.8
58 || 45.5 | 0.320 | 3.42] 8.40 | 0.289 | 473.3 | 481.6 | 490.1 | 498.6 | 507.0 | 515.4 | 523.9
57 || 44.0 | 0.304 | 3.25) 8.57 | 0.276 | 473.4 | 481.7 | 490.2 | 498.7 | 507.1 | 515.5 | 524.0
56 || 42.5 | 0.288 | 3.09) 8.73 | 0.261 | 473.5 | 481.8 | 490.3 | 498.8 | 507.2 | 515.6 | 524.1
81] 84 || 84.0 | 1.136 | 12.17] 0.00 | 1.000 | 167.8 | 476.2 | 484.5 | 492.7 | 501.2 | 509.6 | 517.9
83 || 82.5 | 1.083 | 11.61] 0 56 | 0.954 | 468.1 | 476.4 | 484.8 | 493.2 | 501.5 | 509.8 | 518.2
82 81.0 | 1.034 | 11.07] 1.10 | 0.910 | 468.4 | 476.7 | 485.1 | 493.5 | 501.8 | 510.1 | 518.5
81 || 79.5 | 0.986 | 10.55} 1.62 | 0.867 | 168.6 | 176.9 | 455.4 | 1493.7 | 502.1] 510.5 | 518.8
80 78.0 | 0.940 | 10.07) 2.10 | 0.827 | 468.9 | 477.3 | 485.7 | 494.0 | 502.4] 510.8 | 519.1 |
79 || 76.5 | 0.896 | 9.59| 2.58 | 0.788 | 469.1 | 477.5 | 485.9 | 494.2 | 502.6 | 511.0 | 519.3
78 75.0 | 0.854 | 9.14| 3.03 | 0.751 | 469.4 | 477.8 | 486.1 | 494.5 | 502.9 | 511.3 | 519.7
77 ~=+‘|| 73.5 | 0.814 | 8.71) 3.46 | 0.716 | 469.6 | 178.0 | 486.3 | 494.7 | 503.1 | 511.5 | 519.9 |
76 72.0 | 0.776 | 8.30) 3.87 | 0.682 | 469.8 | 478.2 | 486.5 | 494.9 | 503.3 | 511.7 | 520.1
i 75d 70.5 | 0.73 7.90! 4.27 | 0.619 | 470.1 | 478.5 | 486.8 | 495.2 | 503.6 | 512.0 | 520.4 |
74 69.0 | 0.704 | 7.53] 4.64 | 0.619 | 470.3 | 478.7 | 487.0 | 495.4 503.8 | 512.2 | 520.6
i| 73 '| 67.5 | 0.670 | 7.17| 5.00 | 0.589 | 470.5 | 478.9 | 487-2 | 495.6 | 504.0 | 512.4 | 520.8
72 66.0 | 0.638 | 6.83, 5.34 | 0.561 | 470.6 | 479.0 | 487.4 | 495.8 | 504.2 | 512.6 | 521.0 |!
ek a ' 64.5 0.607 | 6.50) 5.67 0.534 | 170.7 479.1 (187.5 | 495.9 504.3 512.7 a
R 14

———————

8

———S—
ii

PSYCHROMETRICAL TABLES.

0

hr. Dew- | Vapor

Point,

71 || 64.5 | 0.607
70 || 63.0 | 0.578
69 || 61.5 | 0.550
68 || 60.0 | 0.523

67 || 58.5 | 0.498
66 || 57.0 | 0.473
65 || 55.5 | 0.450

64 || 54.0 | 0.428
63 || 52.5 | 0.407
62 || 51.0 | 0.386
61 || 49.5 | 0.367
60 || 48.0 | 0.349
59 || 46.5 | 0.331
58 || 45.0 | 0.315
57 || 43.5 | 0.299

85 || 85.0 | 1.171
84 || 83.5 | 1.118
83 || 82.0 | 1.067
82 || 80.5 | 1.017
81 || 79.0 | 0.970
80 || 77.5 | 0.925
79 || 76.0 | 0.882

78 || 74.5 | 0.840
77 || 73.0 | 0.801
76 || 71.5 | 0.763
75 || 70.0 | 0.727
74 || 68.5 | 0.692
73. || 67.0 | 0.659
72 || 65.5 | 0.628

71 || 64.0 | 0.597
70 || 62.5 | 0.568
69 || 61.0 | 0.541
68 || 59.5 | 0.515
67 || 58.0 | 0.489
66 |) 56.5 | 0.465
65 || 55.0 | 0.442

64 || 53.5 | 0.421
63 || 52.0 | 0.400
62 || 50.5 | 0.380
61 || 49.0 | 0.361
60 || 47.5 | 0.343
59 || 46.0 | 0.326
58 || 44.5 | 0.309

Fahr English
Wet. Inches.

Reading
of Ther- || Temp. Force
Shen of f
: in
Dry. ?

'

SS SS

Weight ;
ae ae Weight in Grains of a Cubic Foot of Air.

Ina
Cubic
Foot of

Air.

gr. i
6.50

6.18
5.87
5.59
5.31
5.05
4.81

4.57
4.35
4.13
3.93
3.73
3.55
3.37
3.20

12.53
11.95
11.40
10.87
10.38

9.89

9.43

8.98
8.55
8.15
7.76
7.39
7.04
6.71

6.37
6.07
5.77
5.45
5.21
4.96
4.72

4.49
4.26
4.05
3.85
3.66

3.48 |
3.31

u-
midit;
Boon BAGO Height of the Barometer in English Inches.

Reqd.

SEACH tion = |———
bic Ft. 1.000. in. in. in. in. in. in.
of Air. 28.0 28.5, 29.0 29.5 30.0 390.5

gr. gr. gr. gr. gr. gr. gr.
5.67 | 0.534 | 470.7 | 479.1 | 487.5 495.9 | 504.3 | 512.7

5.99 | 0.508 | 470.9 | 479.3 | 487.7 | 496.1 504.5 | 512.9
6.30 | 0.482 | 471.1 | 479.5 | 487.9 | 496.3 504.7 | 513.1
6.58 | 0.459 | 471.2 | 479.6 | 488.0 | 496.4 504.8 | 513.2
6.86 | 0.436 | 471.4 | 479.8 | 488.2 | 496.6 505.0 | 513.4
7.12 | 0.415 | 471.6 | 480.0 | 488.3 | 496.7 505.2 | 513.6
7.36 | 0.395 | 471.6 | 480.0 | 488.4 | 496.8 505.3 | 513.7

7.60 | 0.375 | 471.7 | 480.1 | 488.5 | 496.9 505.4 | 513.8
7.82 | 0.357 | 471.8 | 480.2 | 488.6 | 497.0 505.5 | 513.9
8.04 | 0.339 | 471.9 | 480.4 | 488.8 | 497.2 505.7 | 514.0
8.24 | 0.323 | 472:1 | 480.5 | 488.9 | 497.3 505.8 | 514.1
8.44 | 0.306 | 472.2 | 480.6 | 489.0 | 497.4 505.9 | 514.2
8.62 | 0.292 | 472.3 | 480.7 | 489.1 | 497.5 506.0 | 514.3
8.80 | 0.277 | 472.4 | 480.8 | 489.2 | 497.6 506.1 | 514.4
8.97 | 0.263 | 472.5 | 480.9 | 489.3 | 497.7 506.2 | 514.5

0.00 | 1.000 | 466.8 | 475.2 | 483.5 | 491.8 | 500.1 508.5
0.58 | 0.954 | 467.1 | 475.4 | 483.7 | 492.1 500.4 | 508.7
1.13 | 0.910 | 467.3 | 475.6 | 484.0 | 492.4 | 500.7 509.0
1.66 | 0.868 | 467.6 | 475.9 | 484.3 | 492.7 501.0 | 509.3
2.15 | 0.829 | 467.8 | 476.1 | 484.5 | 492.9 | 501.2 509.5
2.64 | 0.789 | 468.1 | 476.4 | 484.8 | 493.2 | 501.5 509.8
3.10 | 0.753 | 468.4 | 476.7 | 485.1 | 493.5 501.8 | 510.1

3.55 | 0.717 | 468.6 | 476.9 | 485.3 | 493.7 502.0 | 510.3
3.98 | 0.682 | 468.7 | 477.1 | 485.5 | 493.9 502.2 | 510.5
4.38 | 0.650 | 469.0 | 477.4 | 485.8 | 494.2 502.5 | 510.8
4.77 | 0.619 | 469.2 | 477.6 | 486.0 | 494.4 | 502.7 511.0.
5.14 | 0.589 | 469.4 | 477.8 | 486.2 | 494.6 502.9 | 511.2
5.49 | 0.562 | 469.7 | 478.1 | 486.5 | 494.9 503.2 | 511-5
5.82 | 0.536 | 469.9 | 478.3 | 486.7 | 495.1 503.4 | 511.7

6.16 | 0.508 | 470.1 | 478.5 | 486.9 | 495.3 503.6 | 511.9
6.46 | 0.484 | 470.3 | 478.7 | 487.1 | 495.5 503.8 | 512.1
6.76 | 0.460 | 470.5 | 478.9 | 487.2 | 495.6 504.0 | 512.4
7.05 | 0.437 | 470.6 | 479.0 | 487.3 | 495.7 504.1 | 513.5
7.32 | 0.415 | 470.6 | 479.0 | 487.4 | 495.8 504.2 | 512.6
7.57 | 0.396 | 470.7 | 479.1 | 487.5 | 495.9 504.3 | 512.7
7.81 | 0.377 | 470.8 | 479.2 | 487.6 | 496.0 504.4) 512.8

8.04 | 0.359 | 470.9 | 479.3 | 487.7 | 496.1 504.5 | 512.9
8.27 | 0.340 | 471.1 | 479.5 | 487.9 | 496.3 504.7 | 513.1
8.48 | 0.323 | 471.2 | 479.6 | 488.1 | 496-4 504.5 | 513.2
8.68 | 0.307 | 471.3 | 479.7 | 488.2 | 496.5 504.9 | 513.3
8.87 | 0.292 | 471.4) 479.8 | 488.3 | 496.6 505.0) 513.4
9.05 | 0.278 | 471.5 | 479.9 | 488.4 | 496.7 505.1 | 513.5
9.22 | 0.264 | 471.6 | 480.1 | 488.5 | 496.8 505.2 | 513.6

172

PSYCHROMETRICAL TABLES.

| Re al Welgnt Weight in Grains of a Cubic Foot of Air
of Ther- || '‘Temp.| Force ESL ceNan Oe Hu- ; ' |
mometer, of Oe ees ee midity, - I
Fahr. Dew- ip na or Satura- Height of the Barometer in English Inches.
Point, in | Cubic | Sat’n. | tion =
Fe ee ee ee l-000. | srl. CINE Sa | Cae oan Cae enone eee |
Dawei Wet. Inches. | Air. | bic Ft. H !
y * of Air. 28.0 28.5 /29.0 29.5 30.0 30.5 31.0
° ° ° in. gr gr. : gr. gr. gr. gr. gr.
86) 86 86.0 | 1.209 | 12.91} 0.00 | 1.000 -0 | 482.3 | 490.6 | 498.9 | 507.2 | 515.5
85 84.5 | 1.153 | 12.31] 0.60 | 0.954 474.3 | 482.6 | 490.9 | 499.2 | 507.5 | 515.8
84 83.0 | 1.101 | 11.75] 1.16 | 0.910 474.6 | 482.9 | 491.2 | 499.5 | 507.8 | 516.1
83 81.5 | 1.050 | 11.20} 1.71 | 0.868 474.8 | 483.2 | 491.5 | 499.8 | 508.1 | 516.5
82 80.0 | 1.001 | 10.69] 2.22 | 0.828 | 466.5 | 475.1 | 483.5 | 491.8 | 500.1 | 508.4 | 516.8
81 78.5 | 0.955 | 10.19} 2.72 | 0.789 | 467.1 | 475.4 | 483.8 | 492.1 | 500.4) 508.7 | 517.1 |
80 77.0 | 0.910 | 9.71] 3.20 | 0.752. | 467.3 | 475.6 | 484.0 | 492.3 | 500.7 | 509.0 | 517.4
79 75.5 | 0.868 | 9.25] 3.66 | 0.717 | 467.5 | 475.8 | 484.2 | 492.5 | 500.9 | 509.2 | 517.6
78 74.0 | 0.827 | 8.82} 4.09 | 0.683 | 467.8 | 476.1 | 484.5 | 492.8 | 501.2 | 509.5 | 517.9
a 72.5 | 0.787 | 8.40} 4.51 | 0.651 | 468.0 | 476.3 | 484.7 | 493.0 | 501.4 | 509.7 | 518.1
76 71.0 | 0.751 | 8.00] 4.91 | 0.619 | 468.2 | 476.5 | 484.9 | 493.2 | 501.6 | 509.9 | 518.3
15 69.5 | 0.715 | 7.62] 5.29 | 0.590 | 468.3 | 476.6 | 485.0 | 493.4 | 501.8 | 510.2 | 518.6
74 68.0 | 0.681 | 7.26] 5.65 | 0.562 | 468.5 | 476.8 | 485.2 | 493.6 | 502.0 | 510.4 | 518.8
73 66.5 | 0.648 | 6.91] 6.00 | 0.535 | 468.8 | 477.1 | 485.5 | 493.9 | 502.2 | 510.6 | 519.0
72 65.0 | 0.617 | 6.58] 6.33 | 0.509 | 468.9 | 477.2 | 485.6 | 494.0 | 502.4 | 510.8 | 519.2
val 63.5 | 0.588 | 6.26] 6.65 | 0.485 | 469.1 | 477.4 | 485.8 | 494.2 | 502.6 | 511.0 | 519.4
70 62.0 | 0.559 | 5.95} 6.96 | 0.461 | 469.2 | 477.5 | 485.9 | 494.3 | 502.7] 511.1 | 519.5
69 60.5 | 0.532 | 5.66] 7.25 | 0.438 | 469.4 | 477.7 | 486.1 | 494.5 | 502.9 | 511.3 | 519.7
68 59.0 | 0.506 | 5.38] 7.53 | 0.417 | 469.6 | 477.9 | 486.3 | 494.7 | 503.1 | 511.5 | 519.9
67 57.5 | 0.481 | 5.11] 7.80 | 0.396 | 469.8 | 478.1 | 486.5 | 494.9 | 503.3 | 511.7 | 520.1
66 56.0 | 0.458 | 4.87] 8.04 | 0.377 | 469.9 | 478.2 | 486.6 | 495.0 | 503.4 | 511.8 | 520.2
65 54.5 | 0.435 | 4.63] 8.28 | 0.359 | 470.0 | 478.3 | 486.7 | 495.1 | 503.5 | 511.9 | 520.3
64 53.0 | 0.414) 4.40} 8.51 | 0.341 | 470.1 | 478.4 | 486.8 | 495.1 | 503.6 | 512.0 | 520.4
635 51.5 | 0.393 | 4.19] 8.72 | 0.325 | 470.2 | 478.5 | 486.9 | 495.2 | 503.7 | 512.1 | 520.5
62 50.0 | 0.373 | 3.98] 8.93 | 0.308 | 470.4 | 478.7 | 487.1 | 495.4 | 503.9 | 512.2 | 520.7
61 48.5 | 0.355 | 3.78] 9.13 | 0.293 | 470.5 | 478.8 | 487.2 | 495.5 | 504.0 | 512.3 | 520.8
60 47.0 | 0.337 | 3.59] 9.32 | 0.278 | 470.6 | 478.9 | 487.3 | 495.6 | 504.1 | 512.4 | 520.9
59 45.5 | 0.320 | 3.40/ 9.51 | 0.263 | 470.7 | 479.0 | 487.4 | 495.7 | 504.2 | 512.5 | 521.0
87 | 87 || 87.0] 1.247 | 13.29] 0.00 | 1.000 | 464.5 | 472.8 | 481.1 | 489.4 | 497.7 | 506.0 | 514.3
86 85.5 | 1.190 | 12.68) 0.61 | 0.954 | 464.8 | 473.1 | 481.4 | 489.7 | 498.0] 506.3 | 514.6
85 84.0 | 1.136 | 12.10) 1.19 | 0.910 | 465.1 | 473.4 | 481.7 | 490.0 | 498.3 | 506.6 | 514.9
84 $2.5 | 1.083 | 11.54] 1.75 | 0.868 | 465.4 | 473.7 | 482.0 | 490.3 | 498.6 | 506.9 | 515.2
83 81.0 | 1.034 | 11.01) 2.28 | 0.828 | 465.7 | 474.0 | 482.3 | 490.6 | 498.9 | 507.2 | 515.5
82 79.5 | 0.986 | 10.49) 2.80 | 0.789 | 466.0 | 474.3 | 482.6 | 490.9 | 499.2 | 507.5 | 515.8
81 78.0 | 0.940 | 10.01] 3.28 | 0.753 | 466.3 | 474.6 | 482.9 | 491.2 | 499.5 | 507.8 | 516.1
80 76.5 | 0.896 | 9.54) 3.75 | 0.718 | 466.5 | 474.8 | 483.1 | 491.4 | 499.8 | 508.1 | 516.5
79 75.0 | 0.854 | 9.09) 4.20 | 0.684 | 466.8 | 475.1 | 483.5 | 491.8 | 500.1 | 508.4 | 516.8 |
78 73.5 | 0.814 | 8.66] 4.63 | 0.652 | 467.0 | 475.3 | 483.7 | 492.0 | 500.3 | 508.6 | 517.0
! 77 72.0 | 0.776 | 8.24] 5.05 | 0.620 | 467.2 | 475.5 | 483.9 | 492.2 | 500.5 | 508.8 | 517.2 |:
76 70.5 | 0.739 | 7.85) 5.44 | 0.591 | 467.3 | 475.6 | 484.0 | 492.3 | 500.7 | 509.0 | 517.4
75 69.0 | 0.704 | 7.48) 5.81 | 0.563 | 467.5 | 475.8 | 484.2 | 492.5 | 500.9 | 509.2 | 517.6
74 67.5 | 0.670 | 7.12] 6.17 | 0.536 | 467.7 | 476.0 | 484.4 | 492.7 | 501.1 | 509.4 | 517-8
B 136

PSYCHROMETRICAL TABLES.

Reading

of Ther-

mometer,
Fahr.

Dry.

87 | 74
73
72

88 | 88

Wet.

Weight

Force of Vapor _
of Reqd.

Vapor | Ina for
in Cubic | Sat’n.
English | Foot of of aCu-
Inches. | Air. | bic Ft.
of Air.

in. gr. gr
0.670 | 7.12) 6.17
0.638 | 6.78) 6.51
0.607 | 6.46| 6.83
0.578 | 6.14| 7.15
0.550 | 5.85] 7.44
0.523 | 5.56| 7.73
0.498 | 5.28) 8.01
0.473 | 5.02) 8.27
0.450 | 4.77) 8.52
0.428 | 4.54) 8.75
0.407 | 4.33) 8.96
0.386 | 4.12] 9.17
0.367 | 3.91] 9.38
0.349 | 3.71) 9.58
0.331 | 3.51] 9.78
1.286 | 13.68; 0.00
1.228 | 13.06] 0.62
1.171 | 12.46) 1.22
1.118 | 11.58) 1.80
1.067 | 11.34) 2.34
1.017 | 10.81] 2.87
0.970 | 10.31] 3.37
0.925 | 9.83] 3.85
0.882 | 9.37) 4.31
0.840 | 8.93) 4.75
0.801 | 8.50! 5.18
0.763 | 8.09) 5.59
Were ec alll aie eh
0.692 | 7.34) 6.34
0.659 | 6.99) 6.69
0.628 | 6.66) 7.02
0.597 | 6.33] 7.35
0.568 | 6.03) 7.65
0.541 | 5.74] 7.94
0.515 | 5.45] 8.23
0.489 | 5.18) 8.50
0.465 | 4.93) 8.75
0.442 | 4.69} 8.99
0.421 | 4.47, 9.21
0.400 | 4.25) 9.43
0.380 | 4.04) 9.64
0.361 | 3.83) 9.85
0.343 | 3.62) 10.06

Hu-

midity,

Satura-
tion =

1.000.

0.536
0.510
0.486
0.462
0.440
0.418
0.397

0.378
0.359
0.342
0.326
0.310
0.294
0.279
0.264

1.000
0.954
0.911
0.868
0.829
0.790
0.754

0.718
0.685
0.653
0.621
0.591
0.563
0.537

0.511
0.487
0.463
0.441
0.420
0.398
0.378

0.359
0.342
0.326
0.310
0.295
0.280

0.265

Weight in Grains of a Cubic Foot of Air.

Height of the Barometer in English Inches.

ine eine

in. in. in. in.
28.0 28.5) 29.0 29.5 30.0) 30.5

gr. gr. gr. gr. gr. gr. gr.

467.7 | 476.0 | 484.4 | 492.7 | 501.1 | 509.4 | 517.8
467.9 | 476.2 | 484.6 | 492.9 | 501.3 | 509.6 | 518.0
468.1 | 476.4 | 484.8 | 493.1 | 501.5 | 509.8 | 518.2
468.3 | 476.6 | 485.0 | 493.3 | 501.7 | 510.1 | 518.5
468.4 | 476.7 | 485.1 | 493.5 | 501.9 | 510.3 | 518.7
468.5 | 476.9 3 | 193.7 | 502.0 | 510.4 | 518.8
468.7 | 477.1 493.9 | 502.2 | 510.6 | 519.0

wo —

Se
oO oO
or or
Or Gs

| 494.0
i $94.1
494.3
494.4
494.5
494.6
494.8
494.9

468.8
4168.9
469.1
469.2
469.3
469.4
4169.6
469.7

477.2
477.3
477.5
477.6
477.7
477.8
477.9
478.1

ie
mw
or or Or

502.3
502.4
502.6
502.7
502.8
502.9
503.1
503.2

510.7
510.7
510.9
511.0
511.1
511.2
511.4
511.5

519.1
519.2
519.4
519.5
519.6
519.7
D199
520.0

=
D

_
a wm
SD

_

ro

Dn
5 SD Ss ON WK
Oounwrnre ©OItH

Se
wo nD
SoS Sc

463.5
463.8
464.2
464.4
464.7
465.0
465.2

471.7
472.0
472.4
472.7
473.0
473.3
473.5

480.0
480.3
480.7
481.0
481.3
481.6
481.8

488.3
488.6
489.0
489.3
489.6
489.9
490.1

496.6
496.9
497.3
497.6
497.9
498.2
498.4

504.8
505.1
505.6
505.9
506.2
506.5
506.7

513.1
513.4
513.9
514.2
514.5
514.8
515.0

465.5
465.8
466.1
466.3
466.4
466.6
466.8

473.8
474.1
474.4
474.6
474.7
474.9
475.1

482.1
482.4
482.7
482.9
483.0
483.2
483.4

490.4
490.7
491.0
491.2
491.3
491.5
491.7

498.7
499.0
499.3
499.5
499.7
499.9
500.1

507.0
507.3
507.6
507.8
508.0
508.2
508.4

515.3
515.6
515.9
516.2
516.4
516.6
516.8

467.0
4167.2
467.4
467.4
467.6
467.7
467.9

475.3
475.5
475.7
475.7
475.9
476.0
476.2

483.6
483.8
484.0
484.0
484.2
484.3
484.5

491.9
492.1
492.3
492.4
492.6
4192.7
492.9

500.3
500.5
500.7
500.8
501.0
501.2
501.3

508.6
508.8
509.0
509.1
509.3
509.4
509.6

517.0
517.2
517.4
517.5
517.7
517.8
518.0

468.1
468.2
468.3
468.4
468.6 | 476.9
468.7 | 477.1
468.8 | 477.2

476.4
476.5
476.6
476.7

518.2
518.3
518.4
518.5

484.7
484.8
484.9
485.1 | 493.4
485.3 | 493.6
485.4; 493.7
485.5 | 493.8

493.1
493.2
493.3

501.5
501.6
501.7
501.8
502.0
502.1
502.2

509.8
509.9
510.0
510.1

510.3 | 518.7
510.4

518.8
510.5 | 518.9 i

137

PSYCHROMETRICAL TABLES.

SS
Reading wae ES Weight in Grains of a Cubic Foot of Air. |
of Ther- || Temp.| Force a oeeNe eter Hu-
mometer, of On Reqd. | idity, 5 r ;

Fahr, Dew- | Vapor | Ina | for | satura- Height of the Barometer in English Inches.
Raine in | ‘Cubic’|/Sat?n:)) gon —
—— || Fahr’ | English Foot of ofaCu-| 7 999, 3 : i i i e ;
Inches. | Air. |bic Ft. in. in. in. in. in. in. in.
Dry.| Wet. of Air. 28.0 28.5 29.0 29.5 30.0|'30.5 31.0
° ° ° in. gr gr gr. gr. gr. gr. gr. gr. gr. |:
' 89 | 89 89.0 | 1.326 | 14.08} 0.00) 1.000 | 462.4 | 470.6 | 478.9 | 457.1 | 495.4 | 503.6 | 511.9 |
i 88 87.5 | 1.266 | 13.44) 0.64) 0.954 | 462.7 470.9 | 479.2 | 487.4 | 495.7 | 503.9 | 512.2
87 || $6.0 | 1.209 | 12.84] 1.24] 0.912 | 463.0 | 471.2 | 479 5 | 487.8 | 496.1 | 504.4 | 512.7
86 84.5 | 1.153 | 12.24] 1.84] 0.869 | 463.3 | 471.5 | 479.8 | 488.1 | 496.4 | 504.7 | 513.0
85 || 83.0] 1.101 |11.68| 2.40] 0.830 | 463.6 | 471.8 | 480.1 | 488.4 | 496.7 | 505.0 | 513.3
84 81.5 | 1.050 | 11.13] 2.95] 0.791 | 464.0 | 472.2 | 480.5 | 488.8 | 497.1 | 505.4 | 513.7
83 80.0 | 1.001 | 10.62] 3.46) 0.754 | 464.2 | 472.5 | 480.8 | 489.1 | 497.4 | 505.7 | 514.0
82 78.5 | 0.955 | 10.13| 3.95] 0.719 | 464.4 | 472.7 | 481.0 | 489.3 | 497.6 | 505.9 | 514.2
81 77.0 | 0.910 | 9.66} 4.42] 0.686 | 464.7 | 473.0 | 481.3 | 489.6 | 497.9 | 506.2 | 514.5
80 || 75.5 | 0.868 | 9.20} 4.88) 0.653 | 464.9 | 473.2 | 481.5 | 489.8 | 498.1 | 506.4 | 514.7
79 | 74.0 | 0.827 | 8.77| 5.31) 0.623 | 465.2 | 473.5 | 481.8 | 490.1 | 498.4 | 506.7 | 515.0
78 72.5 | 0.787 | 8.35| 5.73] 0.593 | 465.4 | 473.7 | 482.0 | 490.3 | 498.6 | 506.9 | 515.2
77 71.0 | 0.751 | 7.96! 6.12] 0.565 | 465.6 | 473.9 | 482.2 | 490.5 | 498.8 | 507.1 | 515.4
76 69.5 | 0.715 | 7.57; 6.51] 0.537 | 465.8 | 474.1 | 482.4 | 490.7 | 499.0 | 507.3 | 515.7
15 68.0 | 0.681 | 7.21) 6.87] 9.512 | 466.0 | 474.3 | 482.6 | 490.9 | 499.2 | 507.5 | 515.8
7 66.5 | 0.648 | 6.87) 7.21] 0.488 | 466.2 | 474.5 | 482.8 | 491.1 | 499.4 | 507.7 | 516.0
73 || 65.0 | 0.617 | 6.54] 7.54) 0.465 | 466.3 | 474.6 | 482.9 | 491.2 | 499.6 | 507.9 | 516.3
72 63.5 | 0.588 | 6.22) 7.86] 0.442 | 466.5 | 474.8 | 483.1 | 491.4 | 499.8 | 508.1 | 516.5
71 32.0 | 0.559 | 5.91] 8.17) 0.420 | 466.7 | 475.0 | 483.3 | 491.7 | 500.0 | 508.3 | 516.7
70 60.5 | 0.532 | 5.62) 8.46) 0.399 | 466.8 | 475.1 | 483.4 | 491.8 | 500.1 | 508.4 | 516.8
69 59.0 | 0.506 | 535] 8.73) 0.380 | 467.0 | 475.3 | 483.6 | 492.0 | 500.3 | 508.6 | 517.0
68 57.5 | 0.481 | 5.08} 9.00} 0.361 | 467.1 | 475.4 | 483.7 | 492.1 | 500.4 | 508.7 | 517.1
67 56.0 | 0.458 | 4.84] 9.24) 0.343 | 467.2 | 475.5 | 483.8 | 492.2 | 500.5 | 508.8 | 517.2
66 54.5 | 0.435 | 4.61) 9.47) 0.327 | 467.4 | 475.7 | 483.9 | 492.4 | 500.7 | 509.1 | 517.4
65 53.0 | 0.414 | 4.39] 9.69) 0.312 | 467.5 | 475.8 | 484.1 | 492.5 | 500.8 | 509.2 | 517.5
64 51.5 | 0.393 | 4.17| 9.91] 0.296 | 467.6 | 475.9 | 484.2 | 492.6 | 500.9 | 509.3 | 517.6
63 50.0 | 0.373 | 3.96] 10.12] 0.281 | 467.7 | 476.1 | 484.3 | 492.7 | 501.0 | 509.4 | 517.7
62 48.5 | 0.355 | 3.76] 10.32] 0.267 | 467.8 | 476.2 | 484.4 | 492.8 | 501.1 | 509.5 | 517.8
90} 90 90.0 | 1.368 | 14.50) 0.00} 1.000 | 461.3 | 469.5 | 477.8 | 486.0 | 494.3 | 502.5 | 510.8
89 88.5 | 1.306 | 13.84] 0.66] 0.954 | 461.6 | 469.8 | 478.1 | 486.3 | 494.6 | 502.8 | 511.1
88 87.0 | 1.247 | 13.22] 1.28} 0.910 | 462.0 | 470.2 | 478.5 | 486.7 | 495.0 | 503.2 | 511.5
87 85.5 | 1.190 | 12.61] 1.89] 0.870 | 462.3 | 470.5 | 478.8 | 487.0 | 495.3 | 503.5 | 511.8
86 84.0 | 1.136 | 12.03) 2.47] 0.830 | 462.7 | 470.9 | 479.2 | 487.4 | 495.7 | 503.9 | 512.1
85 82.5 | 1.083 | 11.47] 3.03] 0.791 | 463.0 | 471.2 | 479.5 | 487.7 | 496.0 | 504.2 | 512.5
84 81.0 | 1.0384 | 10.94] 3.56) 0.755 | 463.2 | 471.5 | 479.8 | 488.0 | 496.3 | 504.5 | 512.8
| 83 79.5 | 0.986 | 10.43] 4.07) 0.719 | 463.4 | 471.7 | 480.0 | 488.2 | 496.5 | 504.7 | 513.0
82 78.0 | 0.940 | 9.95} 4.55] 0.686 | 463.7 | 472.0 | 480.3 | 488.5 | 496.8 | 505.0 | 513.3
81 76.5 | 0.896 | 9.48} 5.02] 0.653 | 464.0 | 472.3 | 480.6 | 488.8 ; 497.1 | 505.3 | 513.6
80 75.0 | 0.854 | 9.03] 5.47) 0.622 | 464.2 | 472.5 | 480.7 | 488.9 | 497.3 | 505.5 | 513.9
79 73.5 | 0.814] 8.61] 5.89) 0.594 | 464.3 | 472.6 | 480.9 | 489.1 | 497.5 | 505.7 | 514.1
78 72.0 | 0.776 | 8.20] 6.30] 0.565 | 464.5 | 472.8 | 481.1 | 489.3 | 497.7 | 505.9 | 514.3
77 | 70-5 0.739 | 7.80) 6.70] 0.538 | 464.7 | 473.0 | 481.3 | 489.5 | 497.9 | 506.1 514.5 |
B 158

PSYCHROMETRICAL TABLES. 175

Wei
Reading of VE Be Weight in Grains of a Cubic Foot of Air.
of Ther- ||Temp | Force ae Hu-
mometer, of ot eqd. | midity, Fa : é
Fahr. Dew- | Vapor | Ina]! for | satura- Height of the Barometer in English Inches.

in Cubic | Sat’n. | tion —
© | English | Foot of ofaCu-| 4 hyo,

s.| Air. !bic Ft. in. in. in. in. in. in. in.
edema dee Ge att 28.0 28.5 29.0 29.5 30.0 30.5| 31.0
—_ |
in. gr. gr gr. gr. gr. gr. gr. gr. gr.

0.739 | 7.80 | 6.70) 0.538 | 464.7 | 473.0 | 481.3 | 489.5 | 497.9 | 506.1 | 514.5
0.704 | 7.43 | 7.07) 0.512 | 465.0 | 473.3 | 481.6 | 489.8 | 498.2 | 506.4 | 514.8 |
0.670 | 7.08 | 7.42] 0.488 | 465.2 | 473.5 | 481.8 | 490.0 | 498.4 | 506.6 | 515.0
0.638 | 6.74 | 7.76) 0.465 | 465.4 | 473.7 | 482.0 | 490.2 | 498.6 | 506.8 | 515.2
0.607 | 6.42 | 8.08) 0.443 | 465.6 | 473.9 | 482.2 | 490.4 | 495.8 | 507.0 | 515.4
0.578 | 6.10 | 8.40) 0.421 | 465.7 | 474.0 | 482.3 | 490.5 | 498.9 | 507.1 | 515.5
0.550 | 5.81 | 8.69] 0.400 | 465.9 | 474.2 | 482.5 | 490.7 | 499.1 | 507.3 | 515.7

0.523 | 5.52 | 8.98] 0.381 | 466.1 | 474.4 | 482.8 | 491.0 | 499.3 | 507.5 | 515.9
0.498 | 5.25 | 9.25) 0.362 | 466.2 | 474.5 | 482.9 | 491.1 | 499.4 | 507.6 | 516.0
0.473 | 4.99 | 9.51) 0.344 | 466.4 | 474.7 | 483.1 | 491.3 | 499.6 | 507.8 | 516.2
0.450 | 4.74 | 9.76] 0.327 | 466.5 | 474.8 | 483.2 | 491.4 | 499.7 | 507.9 | 516.3
0.428 | 4.52 | 9.98] 0.312 | 466.6 | 474.9 | 483.3 | 491.5 | 499.8 | 508.0 | 516.4
0.407 | 4.30 | 10.20} 0.297 | 466.7 | 475.0 | 483.4 | 491.6 | 499.9 | 508.1 | 516.5
0.386 | 4.09 | 10.41} 0.282 | 466.9 | 475.2 | 483.6 | 191.8 | 500.1 | 508.3 | 516.6
0.367 | 3.90 | 10.60} 0.269 | 467.0 | 475.3 | 483.7 | 491.9 | 500.2 | 508.4 | 516.7

B 139

176
TABLE XIII.

FACTORS FOR COMPUTING THE FORCE OF VAPOR, FROM THE READINGS OF THE
PSYCHROMETER, BY APJOHN’S FORMULA.

Dr. Arsonn’s formula for deducing the force of vapor, and the temperature of the
dew-point, from the readings of the Psychrometer as given in the Proceedings of the
Royal Irish Academy for 1840, is

. dieguh
fee i a x ae
when the readings of the wet-bulb thermometer are above 32° Fahr., in which formula

f’ = the force of yapor at the temperature of the dew-point in degrees of Fahr.,
f’ =the force of vapor at the temperature of evaporation given by the wet-bulb

thermometer,

d =the difference between the readings of the dry and wet thermometers,
h =the height of the barometer in Engush inches at the time of the observation.

When the readings of the wet-bulb thermometer are below 32° Fahr., and the bulb

is covered with ice, the formula becomes
hoe d A
f =f" — 96 * 30°
The factors in the following table, which is taken from the Greenwich Observa-

: dient ane
tions for 1843, represent 5 X 35 and 4, X 35, computed for all differences between

30
the wet and dry bulb thermometers, or values of d, from 0° to 21°.

UseE oF THE TABLE.

To find out the force of vapor in the air, and the temperature of the dew-point, by
means of these factors, let the factor corresponding to d, or the difference between
the wet and dry thermometer in the first column, be multiplied into the observed
neight of the barometer, and subtract the result from the force of vapor, in Table
XI., due to the temperature of evaporatian, indicated by the wet-bulb thermometer ;
the rest is the force of vapor in the air at the time of the observation; and the iem-
perature of the dew-point is that which is due to it in Table XI.

EXAMPLE.
The observation gives,

Dry-bulb thermometer = 79° Fahr., or the temperature of the air.

Wet-bulb S = 69° ‘“ or temperature of evaporation.
Difference 10°
Height of barometer 29.7 English inches.
In the Table, 2d part, is found, — factor for a difference of 10° = 0.00379 x 29.7,
or height of barometer = 0.118, which, subtracted from the force of vapor due to

69°, in Table XI., = 0.704 — 0.113, gives force of vapor in the air = 0.591 inches,
and temperature of the dew-point 62°.5.
When the temperature of the wet bulb is below 32° Fahrenheit, tne factors in the

first part of the Table must be used.
B 140

a
XII. FACTOR 96

|
SSS oon aasv4q\NynNM_AX_KV—_—e

177

Below 32° Fahrenheit; the Wet Bulb covered with a Film of Ice.

x a FOR COMPUTING THE FORCE OF VAPOR BY APJOHN’S FORMULA.

ad
FACTOR = X

88

1

30°

Reading of Wet-Bulb Thermometer above 32° Fahrenheit.

1.

2.

Tenths of Degrees.

de

ee | | ef
ee ee | | —

d, or
Difference
of Wet and

6.

7

0 0.00004) 0.00008 |0.00011| 0.00015 {0.00019 | 0.00023) 0.00027
1 -00042| .00046} .00019|} .00053] .00057| .00061/ .00064
2 -00080) .00083|) .00087/ .00091]} .00095| .00098]} .00102
3 -00118) .00121| .00125| .00129] .00132| .00137| .00140
4 -00151} .00135) .00159| .00163| .00167] .00171| .00174| .00178
5 -00189| .00193} .00197} .00201] .00205] .00209| .00212| .00216
6 -00228} .00231] .00235| .00239| .00242] .00246| .00250| .00254
u -00265| .00269| .00273| .00277| .00280] .00284) .00288] .00292
8 -00303| .00307| .00311| .00315) .00318] .00322) .00326] .00330
9 -00341| .00345] .00349| .00352' .00356] .00360| .00364! .00368
10 00379) .00383| .00386} .00390|] .00394] .00398| .00401| .00405
11 -00416|} .00420} .00424| .00428| .004132] .00436] .00439] .00443
12 00454) .00458} .00462| .00466| .00470] .00474| .00477] .00481
13 -00493| .00496| .00500} .00504| .00508] .00511| .00515| .00519
14 -00530) .00534| .00538| .00541) .00545] .00549| .00553] .00556
15 00568) .00572| .00576| .00580) .00584] .00587| .00591| .00595
16 -00606, .00610} .00614| .00618) .00622] .00625| .00629| .00633
ae 00644} .00648} .00652| .00655| .00659] .00663} .00666| .00670
18 -00682| .00686) .00690} .00693| .00697] .00701| .00704| .00708
19 00720) .00724| .00728} .00731| .00735] .00739| .00742| .00746
20 -00758) .00761| .00765| .00769| .00773] .00777/ .00780| .00784

141

eee
Mj —.( —————————————_

8.

0.00030 0.

-00068
-00106
-00144
-00182

-00220
-00258
-00295

-00333
-00371

-00409
-00447
-00485
-00522
-00560

-00598
-00636
-00674
.00712
-00750
.00788

d, or Tenths of Degrees, |
Difference
of Wet and

Breet Ose MRAL Yah Bi whi LBe okie ot Pay Sorrel iGo. {> Yar. | aka vile @s

0 0.00000) 0.00003 |0.00007/ 0.00010} 0.00014 ]0.00017/ 0.00020]0.00024 0.00027 0.00030

1 -00034| .00037| .00041|} .00044| .00047] .00051| .00054| .00058] .00061) .00064

2 -00068| .00071| .00075| .00078| .00081] .00085| .00088] .00092] .00095| .00099

3 -00102| .00105) .00109| .00112} .00116] .00119| .00122! .00126] .00129) .00133

4 -00136| .00139| .00143| .00146} .00150] .00153) .00156} .00160] .00163 -00167

5 -00170| .00173|} .00177| .00180] .00184] .00187| .00190] .00194] .00198! .00201

6 -00204] .00207} .00211| .00214} .00218] .00221| .00224] .00228] .00231) .00235

7 -00238| .00241] .00245] .00248} .00252] .00255| .00258] .00262] .00265) .00269

8 -00272| .00275] .00279] .00282| .00285] .00289] .00292] .00296| .00299| .00302

9 -00306| .00309) .00313] .00316} .00319] .00323)] .00326] .00330| .00333) .00337

10 -00340| .00343} .00347} .00350| .00354] .00357| .00360] .00364| .00367| .00370

-00224
-00261
-00299
-00337
-00375

-00412
-00451
-00489
-00526
-00564

-00602
-00640
.00678
-00716
-00754
-00792

178 TABLE, XLy..

In the Greenwich Magnetic and Meteorological Observations for 1842 and 18438,
Mr. Glaisher discussed the relation between the temperature of evaporation given by
the Wet-bulb Thermometer and the temperature of the Dew-Point as given by Dan-
iell’s Hygrometer. Comparing the observations taken simultaneously every six
hours with the Psychrometer, and with Daniell’s Dew-Point Hygrometer, and divid-
ing the average difference between the temperatures of the Wet and Dry bulb by
the average difference of the temperature of the Dew-Point and of the Air, he ob-
tained the empirical factors given in the following Table.

The observations from which they are deduced are those taken at the Observatory
in the years 1841 to 1845, for the temperatures below 35° F., and in the years 1841
to 1843, for the temperatures above 35° F.

The observations made at Toronto Observatory, Canada West, in similar circum-
stances, in the years 1840 to 1842, were also compared in the same manner, and
the factors derived from them showed a very close accordance for temperatures
above 30° F., but were found smaller at temperatures below 30° F.

The errors in the temperature of the Dew-Point, which may result by using the
Greenwich factors, though frequently within half a degree, often amount, however,
to + 2 or 3 degrees, and, in extreme cases, to + 4 or 5 degrees, as shown in the
volume of the Greenwich Observations for 1842, p. 60 of the Abstracts.

Use of the Table.

Multiply the difference between the Wet-bulb and Dry-bulb Thermometers by the
factor standing in the Table opposite the reading of the Dry-bulb, and subtract the
product from the reading of the Dry-bulb; the remainder will be the temperature of
the Dew-Point.

Example. — Dry-bulb = 62° F.; Wet-bulb = 55°; Difference = 7°.

Opposite 62°, in the first column, stands the factor 1.7, which multiplied by 7°, the
difference, gives 11°.9, to be subtracted from the Dry-bulb ; or 62° — 11°.9 = 50°.1,
temperature of the Dew-Point.

XIV. FACTORS TO FIND OUT THE TEMPERATURE OF THE DEW-POINT FROM THE
READINGS OF THE PSYCHROMETER. — GLAISHER.

| Dry-Bulb ‘Dry-Bulb Dry-Bulb Dry-Bulb Dry-Bulb
Therm. Factors. || Therm. | Factors. Therm. Factors. ‘Therm. Factors. Therm. Factors.

|| Fahren. Fahren. Fabren. Fahren. Fahren.
Dik 8.5 35° 2.6 Age |, Bee 63° 17 rig 1.5
22 8.5 36 2.6 50 2.1 64 1.7 78 1.5
23 8.5 37 2.5 51 2.1 65 iNeya, 79 1.5
24 7.3 38 2.9 52 2.0 66 1.6 80 1.5
25 6.4 39 2.5 53 2.0 67 1.6 81 1.5
26 6.1 40 2.4 54 2.0 68 1.6 82 1.5
27 5.9 41 2.4 55 2.0 69 1.5 83 1.5
28 5.7 42 2.4 56 1.9 70 1.5 84 1.5
29 5.0 43 2.4 57 1.9 71 1.5 85 © 1.5
30 4.6 44 2.3 58 1.9 72 1.5 86 1.5
31 3.6 45 2.3 59 1.8 73 1.5 87 1.5
32 3.1 46 Des 60 1.8 7A 1.5 88 1.5
33 2.8 47 2.2 61 1.8 75 1.5 89 1.5
34 2.6 48 2a, 62 1.7 76 1.5 90 1.5

B 142

' Xv.

179

AIR, AT TEMPERATURES BETWEEN 0° AND 94° FAHRENHEIT.

From the Greenwich Observations.

WEIGHT OF VAPOR, IN GRAINS TROY, CONTAINED IN A CUBIC FOOT OF SATURATED

Temper- | Weight || Temper- | Weight Temper- | Weight Temper- | Weight Temper- | Weight
ature of Vapor, ‘ature | of Vapor, ature of Vapor, ature of Vapor, || ature of Vapor,
of Air, in of Air, in of Air, in of Air, in of Air, in
Fahren. | Grains. Fahren. | Grains. Fabren. Grains Fahren. Grains. Fahren. Grains.
—= een | eee | ||| —— = ee mes
0° | 0.78 19° na? 38° 2.89 57° 5.34 76° 9.60
1 0.81 20 1.58 39 2.99 58 5.51 T7 9.89
2 0.84 21 1.63 40 3.09 59 5.69 78 10.19
3 0.87 22 1.69 Al 3.19 60 5.87 79 10.50
4 0.90 23 1.75 42 3.30 61 6.06 80 10.81
5 0.93 24 1.81 43 3.41 62 6.25 81 11.14
6 0.97 25 1.87 44 3.52 63 6.45 82 11.47
a 1.00 26 1.93 45 3.64 64 6.65 83 11.82
8 1.04 27 2.00 46 3.76 65 6.87 84 12.17
9 1.07 28 2.07 47 3.88 66 7.08 85 12.538
1On ye oteV 1 29 2.14 48 4.01 67 7.30 86 12.91
11 1.15 30 2.21 49 4.14 68 7.53 87 13.29
12 1.19 31 2.29 50 4.28 69 7.76 88 13.68
13 1.24 32 Zeal 51 4.42 70 8.00 89 14.08
14 1.28 33 2.45 52 4.56 71 8.25 90 14.50
15 1.32 34 2.53 53 4.71 72 8.50 91 14.91
16 1.37 35 2.62 54 4.86 73 8.76 92 15.33
17 1.41 36 Dadi 55 5.02 74 9.04 93 15.76
18 1.47 37 2.80 56 5.18 795 9.31 94 16.22
XVI. FACTORS TO DEDUCE THE WEIGHT OF VAPOR CONTAINED IN A CUBIC
FOOT OF AIR, AT THE TIME OF A GIVEN OBSERVATION, FROM THE
INDICATIONS OF DEW-POINT INSTRUMENTS. — GREENW. OBs.
t = Temperature of Air; t' = Temperature of Dew-Point.
Difference Difference | Difference | Difference Difference
or Factors. or Factors. or Factors. or Factors. or Factors.
t—t'. t—t", t—t". t—t!. t—t’.
1 0.999 9 0.982 i 0.966 25 0.951 33 0.935
2 0.996 10 0.980 18 0.964 26 0.949 34 0.934
3 0.994 11 0.978 19 0.962 74 0.947 35 0.932
4 0.992 12 0.976 20 0.960 28 0.945 36 0.930
5 0.990 13 0.974 21 0.958 29 0.943 37 0.929
6 0.988 14 0.972 22 0.956 30 0.942 38 0.927
7 0.986 15 0.970 23 0.954 31 0.939 39 0.925
8 0.984 16 0.968 24 0.952 32 0.937 40 0.923

Use or Taste XVI.— The difference between the temperatures of the air
and of the Dew-Point being known, multiply the factor in the Table corre-
sponding to that difference into the weight of a cubic foot of vapor at the
temperature of the Dew-Point, as given in Table XV., and the product will
be the weight of vapor in a cubic foot of air at the time of the observation.

Example. — Temperature of air = 60° F.; Dew-Point = 52°; Diff. = 8°.

Table gives for a difference of 8°, factor 0.984; Table XV. gives weight
of a cubic foot of vapor at temperature 52° = 4.8"56.

Hence, 0.984 x 4.56 = 4°".49, the weight of vapor required.

B

143

180

TABLE XVII.

FOR COMPARING THE WEIGHT OF A CUBIC FOOT OF DEY AND OF SATURATED ATE.

Teas teble is composed of two tables found im the Greemrich Meteorological
Observations for 1842, pages xlvi. and li.; the first contaming the weight of a
cubic foot of dry air, under a barometric pressure of 30 inches, at temperatures be-
tween O and 90° F.; the other giving the weight of a cubic foot of saturated air
under the same barometric pressure and temperature. together with the excess of the
first above the last. .

The weight of 2 cubic foot of dry air, on which the tables are based, is assumed to
be 563 grains Troy, being a mean value, in round numbers, between the determina-
tons of Shuckburgh, which is 557.7295 grains, and that of Biot and Arago, 568.7013.
The irve mean is 563.2154, but 563 is the number used im the calculations.

The coeficient of the expansion of the air is thai of Gay-Lussac, viz. 0.00375 for
1° Centigrade, or 0.002083 of its bulk for 1° Fahrenheit.

Use of the Table.

This table shows the amount of buoyancy imparted to the air by the addition of
moisture ; and from it, the temperature and the relative humidity of the air being
Known, the weight of a cubic foot of air, in the actual condition of the atmosphere at
the time of an observation, can be deduced.

It sufices to take m the fourth column, headed “ Excess,” the quantity corre-
sponding to the temperature of the air in the first, multiply i into the given Relative
Homidity. and subtract the product from the number in the second column. The
result will be the weight of a cubic foot of air at the existing temperature and
moisture, under a barometric pressure of 30 inches.

This result will be reduced to its true value, under the barometric pressure given
by the observation, by multiplying it by 22" Ferme

Example.

The temperature of the air is 60° F.; the relative humidity, 0.852; the barom-
eter reads 29 inches.
The table gives, for temperature of air, 60°: excess, 3.35 x 0.852 — 2.85, which,
subtracted from 531.91 in the second column, — 529.12, weight of a cubic foot
239 inch

of air under 30 inches of pressure ; and 529.12 x —— = 511-48, the weight of
2 cubic foot of air in the given conditions of temperature, moisture, and barometric ©

pressure.
B i#4 see

181

XVIL FOR COMPARING THE WEIGHT OF A CUBIC FOOT OF DEY
AND OF SATUBATED AIR,

AT TEMPERATUKES BETWEEN @ 45D SO FLERE WEETY.

From che Greenwich Ohservacons.

Weiens :
efacube Eeress |
ibor af at
cara Dey tr
et A>
o co | Gems Gams Gum > | &ams Gams Emm
oO 30 [56535 36602 127) 6 [SIS SH 3S
1 31 |56L17 6236 131 61 [sess TS 3s
2 32 |sa300 S616! 136 62 [50958 3632 358
3 33 5618! sh 12) & [ses 25.0 36
4 033 Si |sede7 35920 Le | 6s [sors] 40 3,
5 O51 325 |sasl saol 150 66 [sess eee ase
a 055 3% )s5835 seTS 1560 | 66 [SST BITS 041
7 @s3 | 37 [537 saa.51 Ls | G7 [5287s MST 41
8 O59 | 33 [55605 208 Les | GS [ses72 SI 535 |
S$ [59133 38072 O41 | 33 [55291 36320 171 | @ [52278 so 40
wo |5900: 59.0 Ost 2 issacz ss20e 177 | 7 |i) st 433 |
lh | sasz3 | sese7| oss | 4 | sszes soose 1s: | 71 [somc) sied2 168
2 [587-48 s67S «G70 42 [55152 $963 159 £72 [51949 SIL5T 8452
13 [586-21 355.9 07209 «4433 [55039 Smt) 155 | 7 [5157 51S «6455
| Wt fsans: 58215 075 4¢ [599237 5635 201 | 7: )517-70 5261 509
: | | .
15 [53367 33259 87S [5816 see 210 TS [5167] SIS 535 )
Wg [532.41 38161 050 0 «646 [5r705 Suess) 217) we [sIncS HOS 5.4 |
7 [sss sess es? |) a7 is5e7 saa5 222) 77 |stett we 56 |
38 [579-91 | 579-06) @ss | 45 [50155 S255 258 | 7S [sIsTT WE 575 |
19 [567 377-79 OSS 8 [STS SSS 253 | 7S [SISe ESE 5S
)
20 [s77-14 | 57651 090 |) 50 [5226 3021 24s) 3S STDS? Sete GS
| 25 576-21 573-27 O92 | 51 ]S81ss Sees 251 | SI [SMAST S226 625 |
22 [57198 57101 O97 | 52 [sues SETST 261 | 82 USS! WSS RL
23 [573-76 57276 41.00 | 53 [53941 55671 270 | 5S [50835 32S? «GST
22 [57255 57150 105 | 54 |ss833 53555 275 | Se |sere7 sents 6st |
L : {
| 25 |svlss S726 107 43 |ssT27 ssi ass SS
Se [57013 569.01 1.12 S6)55819 SSS 2st lCUM
27 )56892 367.77 1.15 57 }595.02 53206 306 ST
23 [56773 se65s 1200 «SS [ssteT seer 515 SS
| 2 [seest 50531 123 aise sat GS OS
32 [56533 seL08 127 2 |53197 862 355 w

182
TAB IiOE: XTV:

Mr. Glaisher published in London, in 1856, another series of Hygrometrical ‘Tables,
which were unknown to the writer when the Second Edition of this volume was
issued. They are based on Regnault’s Table of Elastic Forces of Vapor, and on the
coefficient of the expansion of the air as determined by the same physicist. ‘The
Psychrometrical Table, however, is not computed from Regnault’s formula, but by
first finding out, in the manner described on page 140, the temperatures of the dew-
point from the readings of the Psychrometer, by means of the empirical factors given
below, in Table XIV’., and then taking the corresponding values of the force of
vapor from Regnault’s table. These factors have been derived from the combination
of all simultaneous observations of the dry and wet bulb thermometers with those of
Daniell’s hygrometer, taken at the Royal Observatory, Greenwich, from the year
1841 to 1854, with some observations taken at high temperatures in India, and others
at low and medium temperatures at Toronto; they are, therefore, more correct
than those given in Table XIV. page 140. The results in this new Psychrometrical
Table, nevertheless, by no means entirely coincide with those given by the formula,
as a comparison with those in Table VII. will show.

XIv’, FACTORS TO FIND OUT THE TEMPERATURE OF THE DEW-POINT FROM THE
READINGS OF THE PSYCHROMETER. — GLAISHER.

Dry-Bulb | Dry-Bulb Fae Dry-Bulb ‘Dry-Bulb
Therm. Factors. Therm. Factors. | Therm. Factors. Therm. | Factors. || Therm. | Factors,
Fahren. Fahren. | Fabren. Fahren. | Fahren.
| Rak ea! Nel a twee? RE AMES Se See

° | Oo Oo ° | fe}

10 8.78 28 5.12 46 2.14 64 1.83 82 1.67

11 8.78 | 29 4.63 47 2.12 65 1.82 83 1.67

12 8.78 | 30 4.15 || 48 2.10 66 1.81 84 1.66

13 8.7% ‘i 30 3.70 49 2.08 67 1.80 85 1.65

14 8.76 || 82 3.32 50 2.06 68 1.79 86 1.65

15 8.75 | 33 3.01 51 2.04 69 1.78 87 1.64

16 8:70 =+|- 34 2.77 52 2.02 70 1.77 88 1.64

17 8.62 35 2.60 53 2.00 71 1.76 89 1.63

18 8.50 36 2.50 54 1.98 72 1.75 90 1.63

19 8.34 37 2.42 55 1.96 73 1.74 91 1.62

|

20 Sik bali 88 2.36 56 1.94 74 1.73 92 1.62

21 7.88 39 2.32 57 1.92 75 1.72 || 93 1.61 ||

22 7.60. ||- 40 2.29 58 1.90 76 sev! 94 1.60 |j

23 7.28 Al 2.26 59 1.89 77 1.70 95 1.60

24 6.92 42 2.23 60 1.88 78 1.69 || 96 1.59

25 6.53 43 2.20 61 1.87 79 1.69 97 1.59

26 6.08 || 44 2.18 62 1.86 80 1.68 98 1.58

27 5.61 || 45 2.16 63 1.85 81 1.68 99 1.58

28 5.12. || 46 2.14 64 1.83 82 1.67 100 1.57
Lal

B 146

183

MISCELLANEOUS TABLES,

FOR

COMPARING THE HYGROMETRICAL RESULTS OBTAINED BY DIFFERENT AUTHORITIES.

B 147

b ; OnE ah poe
' 1 Ke Pang | Lae i mr
+ rr in Rey Or
; vay
{
2 t
5 a) i
[
j . c 5 2 af =
iy “eae ee NS E aky ot < a x iy i é
F
‘
i
.
fu Tl |
f
{ 7 omy
'
i J i
t Fy ake pi J We a

-

185

MISCELLANEOUS TABLES.

Tue object of these Tables is to afford the means of comparing the different deter-
minations of the hygrometrical elements which have been obtained, or adopted, by
various physicists, especially the values of the elastic forces of vapor given in other
tables than those contained in the preceding pages.

Table XVIII., giving the elastic forces of vapor, expressed in millimetres of mer-
cury, for Centigrade temperatures, was calculated by August from Dalton’s experi-
ments, and reduced to French measures in the translation of Kaemtz’s Meteorology,
by Chas. Martins, page 70, from which it has been taken. On these values are based
the first psychrometrical tables published by August, in Berlin, 1825.

Table XIX. is the table computed by Kaemtz from his own experiments. It is
found, reduced to French measures, in the same volume, page 68.

Table XX. furnishes the results of the experiments made by Professor Magnus, in
Berlin, and published in Poggendorf’s Annalen, Tom. LXI. p. 226, and also in the
Annales de Chimie et de Physique, 3° série, Tom. XII. p. 88, from which this table
was copied.

Table XXI. has been published by the Committee of Physics and Meteorology of
the Royal Society, in their Report on the Objects of Scientific Inquiry in these
Sciences, London, 1840, p. 89. The values which it contains are not derived from
new experiments, but are probably computed from those existing at that time.

Table XXII. furnishes a synoptic view of the differences in the values of the force
of vapor adopted by various authorities, prepared with the view of facilitating their
comparison. A reference to their respective origin will be found below, page 152.

Table XXIII., showing the weight, in grammes, of the vapor contained in a cubic
metre of saturated air, at different temperatures, is taken from Pouillet’s Eléments de
Physique, Tom. If. p. 707.

Table XXIV. gives the weights as derived from August’s experiments, in Kaemtz’s
Vorlesungen tiber Meteorologie. The table is copied from the French translation,
by Martins, page 73. The tensions have been added, opposite the weights, and are
extracted from August’s table.

Table XXV. is found in Biot’s Traité de Physique, Tom. I. p. 533.

B 149

186
XVIII ELASTIC FORCE OF AQUEOUS VAPOR,
EXPRESSED IN MILLIMETRES OF MERCURY FOR EVERY TENTH OF A CENTIGRADE DEGREE.

CaLcuLATED By AUGUST. |

— SS
Tenths of Degrees.

Centigrade

Degrees.

de 6. 7 8. 9.

oO Millim. | Millim. | Miliim. | Millim. | Millim.
—3l1 0.45 0.45 0.45 0.44 0.44
-30 0.50 0.49 0.49 0.48 0.48
—29 0.54 0.54 0.54 0.53 0.53
—28 0.59 0.58 0.58 0.57 0.57
—27 0.63 0.63 0.63 0.62 0.62

Millim. | Millim. | Millim. | Millim. | Millim.
0.43 0.43 0.42 0.42 0.41
0.47 0.47 0.46 0.46 0.45
0.52 0.52 0.51 0.51 0.50
0.56 0.56 0.55 0.55 0.54
0.61 0.61 0.60 0.60 0.59

—26 0.70 0.69 0.68 0.68 0.67
25 0.77 0.76 0.75 0.75 0.74
—24 0.83 0.83 0.82 0.82 0.81
2
2

0.66 0.66 0.65 0.64 0.64
0.73 0.73 0.72 0.71 0.71
0.80 0.80 0.79 0.78 0.78
0.86 0.86 0.85 0.84 0.84
0.95 0.94 0.93 0.92 0.91

23 0.90 0.89 0.88 0.88 0.87
22 0.99 0.98 0.97 0.96 0.95

—21 1.06 1.05 1.04 1.04 1.03 1.02 1.02 1.01 1.00 1.00
—20 1.15 1.14 1.13 1.12 1.11 1.11 1.10 1.09 1.08 1.07
—19 1.26 1.25 1.24 1.23 1.22 1.21 1.20 1.18 1.17 1.16
—18 1.33 1.32 1.31 1.31 1.30

—17 1.44 1.43 1.42 1.41 1.40 1.39 1.38 1.36 1.35 1.34
—16 1.56 1.54 1.53 1.52 1.51 1.50 1.49 1.47 1.46 1.45
—15 1.69 1.68 1.67 1.65 1.64 1.63 1.61 1.60 1.59 1.57
—14 1.80 1.79 1.78 1.77 1.76 1.75 1.74 1.72 1.71 1.70
-15 1.96 1.94 1.93 1.91 1.89 1.88 1.86 1.85 1.83 1.82

—12 2.12 2.10 2.09 2.07 2.05 2.04 2.02 2.01 1.99 1.98

=I 2.30 2.28 2.26 2.25 2.23 2.21 2.19 2.17 2.16 2.14
—10 2.48 2.46 2.44 2.43 2.41 2.39 2.37 2.35 2.34 2.32
9 2.66 2.64 2.62 2.61 2.59 2ST 2.55 2.53 2.52 2.50
= 18 2.86 2.84 2.82 2.80 2.78 2.76 2.74 2.72 2.70 2.68
7 3.09 3.06 3.04 3.02 3.00 2.97 2.95 2.93 2.91 2.88

3.32 3.29 3.27 3.25 3.23 3.20 3.18 3.16 3.14 3.11
3.56 3.56 3.54 3.51 3-48 3.46 3.43 3.40 3.37 3.35
3.85 3.80 3.78 3.75 3.72 3.70 3.67 3.64 3.61 3.52
4.11 4.07 4.05 4.02 3.99 3.97 3.94 3-91 3.88 3.86
4.40 4.37 4.34 4.32 4.29 4.26 4.23 4.20 4.17 4.14

|
|
1.29 | 1.29 | 128 | 1.27 Lai
|
|
|

|
Dwr AD

-1 4.71 4.68 4.65 4.62 4.59 4.56 4.53 4.49 4.46 4.43
-— 0 5.05 5.01 4.98 4.95 4.91 4.88 4.85 4.81 4.78 4.74
+ 0 5.05 5.09 5.12 5.16 3.19 5.23 5.27 5.30 5.34 5.37

0. 1. 2. 3. 4. | 5. 6. 7 8. 9.
ese leer le ed EE ee ee
B 150

ELASTIC FORCE OF AQUEOUS VAPOR. — AUGUST.

Degrees.

———

ae -

oO pm wo my RO

11
12
13
14
15

——E————EEESSSSSSES=SS==
onmt

16
17
18
19
20

21
22
23
24
25

26
27
28
29

30

31
32
33

35

0.

Millim.
5.41
5.80
6.20
6.63
7.08

7.58
8.10
8.64
9.23
9.90

10.49
11.17
11.86
12.66
13.44

14.28
15.20
16.08
17.01
18.20

19.33
20.51
21.75
23.01
24.18

25.81
27.39
28.96
30.63
32.39

34.24
36.18
38.21
40.38
42.59

0.

1.

Millim.

5.45
5.84
6.24

6.68
7.18

7.63
8.15
8.70
9.30
9.96

10.56
11.24
11.94
12.74
13.52

14.37
15.29
16.17
17.13
18.31

19.45
20.63
21.88
23.13
24.34

25.97
27.55
29.13
30.81
32.57

34.43
36.38
38.43
40.60
42.82

1.

Millim.

5.49
5.88
6.29
6.72
7.18

7.68
8.21
8.76
9.36
10.02

10.63
11.31
12.02
12.82
13.61

14.47
15.38
16.27
17.25
18.43

19.56
20.76
22.00
23.24
24.50

26.135
ater
29.29
30.98
32.76

34.63
36.59
38.64
40.82
43.05

Millim.

5.52
5.92
6.33
6.77
7.23

7.74
8.26
8.82
9.43
10.08

10.69
11.38
12.10
12.90
13.69

14.56
15.46
16.36
17.37
18.54

19.68
20.88
22.13
23.36
24.67

26.28
27.86
29.46
31.16
32.94

34.82
36.79
38.86
41.04
43.28

Tenths of Degrees.

Millim.

5.56
5.96
6.37
6.81
7.28

7.79
8.32
8.87
9.50
10.14

10.76
11.45
12.18
12.98
13.77

14.65
15.55
16.45
17.49
18.65

19.80
21.01
22.26
23.48
24.83

26.44
28.02
29.63
31.23
33.13

35.02
36.99
39.08
41.26
43.51

Millim.

de

5.60
6.00
6.41
6.86
7.33

7.84
8.37
8.93
9.57
10.20

10.83
11.52
12.26
13.05
13.86

14.74
15.64
16.54
17.61
18.76

19.92
21.13
22.38
23.60
24.99

26.60
28.18
29.79
31.51
33.31

35.21
37.20
39.29
41.49
43.74

6.

5.64
6.04
6.46
6.90
7.38

7.89
8.43
8.99
9.63
10.25

10.90
11.59
12.34
13.13
13.94

14.84
15.73
16.64
17.73
18.88

20.03
21.25
22.51
23.71
25.15

26.76
28.34
29.96
31.69
33.50

35.40
37.40
39.51
41.71
43.97

6.

Millim.

7

Millim.

5.68
6.08
6.50
6.95
7.43

7.94
8.48
9.05
9.70
10.31

10.96
11.66
12.42
13.21
14.02

14.93
15.82
16.73
17.85
18.99

20.15
21.38
22.63
23.83
25.32

26.92
28.50
30.138
31.86
33.68

35.60
37.60
39.73
41.95
44.20

7

: wale wae We Be bea et
Centigrade | ————————————— | SS | el

Millim.
Sake
6.13
6.54
6.99
7.48

7.99
8.53
9.11
9.77
10.37

11.03
11.73
12.50
13.29
14.11

15.02
15.90
16.82
17.97
19.10

20.27
21.50
22.76
23.95
25.48

27.07
28.65
30.30
32.04
33.87

9.

Millim.
5.75
6.17
6.59
7.04
7.53

8.05
8.59
O17
9.84
10.43

11.10
11.80
12.58
13.37
14.19

15.11
15.99
16.91 |)
18.09
19.21

20.39
21.63
22.89
24.07
25.64

27.23
28.81
30.46
32.21
34.05

35.79 | 35.99

37.80 | 38.01

39.94 | 40.16

42.15 | 42.37

44.43 | 44.66 |!
8. 9.

151

188

XIX. ELASTIC FORCE OF AQUEOUS VAPOR,

EXPRESSED IN MILLIMETRES OF MERCURY, FOR CENTIGRADE TEMPERATURES.

By KAEMTZ.

Tem per- |
ature Force of
Centi- Vapor. |
Grade. |
ae
| a Millim. |
| —25 0.68 ||
| 94 20:72 tI
—23 | 0.79 |
—22 0.86 \
| ||
| -21 0.92 ||
—20 1.01 |
—19 1.10 1
—18 1520
—l lef 1.29 ||
—16 1.40 |
15 | 151 |
|, -14 1.62 }
| —13 1.76 |
|

| Temper-
| ature

Centi-
grade.

°

|
aAar w ©

|
oe

|
oO — bb

Force of
Vapor.

Millim.
1.92
2.05
2.21
2.39

2.57
2.78
2.98
3.20

3.45
3.70
3.97
4.26
4.58

|

|

Temper-
| ature Force of ||
| Centi- Vapor. |
| grade. |
o | Millim. |
| 0 4.58 |
oa 4.92
| 2 5.26 ||
| 3 5.64
\ ai” 6.01 |
| 5 6.45 ||
6 6.90 ||
1h 7.38 |
| 8 7.39 |
| 9 8.41 |
10 | 9.00 |
|. aa 9.58
a2 10.24 |

14
15

16
17
18
19

20
21
22
23
24

Force of |

Vapor.

Millim.
10.24
10.91
11.62
12.38

13.17
14.03
14.93
15.86

16.87
17.91
19.04
20.21
21.43

=

Temper-

ature Force of
Centi- Vapor.
grade
° Millim.
24 21.43
25 22.74
26 24.16
2 25.56
28 27.07
29 238.67
30 30.36
31 32.17
32 33.95
33 35.95
34 37.99
35 40.15
36 42.40

XX. ELASTIC FORCE OF AQUEOUS VAPOR,

EXPRESSED IN MILLIMETRES OF MERCURY, FOR CENTIGRADE TEMPERATURES.

By MAGNUS.
Temper- | Temper- Temper-
ature Force of || ature Force of ature Force of |
Centi- Vapor. |) Centi- Vapor. Centi- Vapor. |
grade. grade. grade. |
| oa —|——___
| ° Millim. ° Millim ° Millim. |
—20 0.916 —7 2.671 6 6.939 |
-19 | 0.999 || -6 2.886 7 7436 |
|| -18 | 1.089 | -5 3.115 8 | 7.964
-17 1.186 || —4 3.361 9 8.525 |
—16 1.290 || -3 3.624 | 10 9.126
-15 | 1.403 -2 3.905 || 11 | 9.751 |
-14 | 1.525 || -1 | 4.205 | 12 | 10.421 |
—13 1.655 0 4.525 ill = 138441130. 4
—12 1.796 +1 4.867 | 14 | 11.882
11 1.947 2 5.231 | 15 | 12.677
—10 2.109 3 5.619 | 16 | 13.519
-—9 2.284 4 6.032 | 17 | 14.409
-8 2.471 5 6.471 | 18 15.351
IL | |
B 152

Temper-
ature
Centi-
grade

Force of
Vapor.

Millim.
16.345
17.396
18.505
19.675
20.909

22.211
23.582
25.026
26.547
28.148

29.832
31.602
33-464

Temper-

| ature Force of

Centi- Vapor.

| grade.
° Millim.
32 35.419
33 37.473
34 39.630
35 41.893
36 44.268
37 46.758
38 49.368
39 52.103
40 54.964
41 57.969
42 61.109
43 64.396
44 67.533

189

XXI. ELASTIC FORCE OF AQUEOUS VAPOR,

EXPRESSED IN ENGLISH INCHES OF MERCURY, FOR TEMPERATURES OF FAHRENHEIT.

From the Royal Society’s Report.

Temperature
of
Air.

Fahrenheit.

—_

11
12
13
14
15

oemnt GU 2 ee BO ais ok

16
17
18
19
20

21
22
25
24

26
27
28
29
30
31

| Eng. Inches.

0.051
0.053
0.056
0.058
0.060
0.063

0.066
0.069
0.071
0.074
0.078

0.081
0.084
0.088
0.092
0.095

0.099
0.103
0.107
0.112
0.116

0.121
0.126
0.131
0.136
0.142

0.147
0.153
0.159
0.165
0.172

Temperature
of

Air.

Fahrenheit.
St,
32
33
34
35
36

37
38
39
40
41

42
43
AL
45
46

47
48
49
50
51

52
53
54
55
56

57
58
59
60
61
62

0.179 r

Force
of
Vapor.

Eng Inches.
0.179
0.186
0.193
0.200
0.208
0.216

0.224
0.233
0.242
0.251
0.260

0.270
0.280
0.291
0.302
0.313

0.324
0.336
0.349
0.361
0.375

0.389
0.402
0.417
0.432
0.447

0.463
0.480
0.497
0.514
0.532
0.551

Temperature
f

oO
Air.

62°
63
64
65
66
$7

68
69
70
71
72

73
TA
75
76

78
79
80
81
82

83
84
85
86
87

—_—

88
89
90
91
92
93

153

Fahrenheit.

Eng. Inches.

0.551
0.570
0.590
0.611
0.632
0.654

0.676
0.699
0.723
0.748
0.773

0.799
0.826
0.854
0.882
0.911

0.942
0.973
1.005
1.036
1.072

1.106
1.142 |
1.179
1.217
1.256

1.296
1.337
1.380
1.423
1.468
1.514

' Temperature

of
Air.

Fahrenheit.
93°
94
95
96
97
98

99
100
101
102
103

104
105
106
107
108

109
110
111
112
113

114
115
116
117
118

119
120
121
122
123
124

Eng. Inches.

1.514
1.562
1.610
1.660
1.712
1.764

1.819
1.874
1.931
1.990
2.050

2.112
2.176
2.241
2.307
2.376

2.447
2.519
2.593
2.669
2.747

2.826
2.908
2.992
5.078
3.166

3.257
3.349
3.444
3.542
3.641
3.743

190

TABLES Se

FOR SHOWING THE DIFFERENCES IN THE VALUES OF THE ELASTIC FORCE OF
AQUEOUS VAPOR ADOPTED BY DIFFERENT AUTHORITIES,

Tue following synoptic view of the values of the elastic force of vapor adopted by
various authorities, furnishes the means of readily comparing them, and of appreci-
ating the amount of the differences which they exhibit. ‘The values are given both
in English and in French measures.

Dalton’s values are copied from the Edinburgh Encyclopedia, Art. Hygrometry.
Those adopted in the Greenwich Observations are found in the same article, and also
in the volumes published annually by that Observatory. Biot’s table of tensions is,
in fact, the same, computed by Pouillet from Dalton’s results, by Biot’s formula, and
published in Biot’s Traité de Physique, Tom. I. p. 531. Dr. Ure’s results are taken
from his Memoir in the Philosophical Transactions for 1818, p. 347. In the column
headed ‘* Daniell” are given the forces of vapor as found in the table published in his
Meteorological Essays, 2d edition, p. 596, a table computed by Galbraith, from Dr.
Ure’s experiments, by the formula of Ivory.

For the columns headed Royal Society, August, Kaemtz, Magnus, and Regnault,
see above, p. 147.

B : 154

19155

XXII. FOR SHOWING THE DIFFERENCES IN THE VALUES OF THE ELASTIC
FORCE OF AQUEOUS VAPOR, ADOPTED BY DIFFERENT AUTHORITIES.

FORCE OF VAPOR EXPRESSED IN ENGLISH INCHES FOR TEMPERATURES
r OF FAHRENHEIT.

Force of Vapor according to
Temper- Temper-

aqurey || ye. f = ature

of Air, | Green- nee of Air,
Fahren- wich . oya Fahren-

heit. Dalton. Onecare ee: Daniell. | goof ety. August. | Kaemtz. | Magnus. | Regnault. leit:

tions.

Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In.
0.064 | 0.061 +... | 0:068 | 0.051, |) 0.053; | 0.048 | 0.044 | -0.013
10 0.090 | 0.089 | .... | 0.098 | 0.078 | 0.082 | 0.074 | 0.070 | 0.068 1
20 0.129 0.129 Sistiets 0.140 0.116 0.124 0.112 0.108 0.108 20
30. || 0.186 | 0.186 | .... | 0.200 | 0.172 | 0.184 | 0.166 | 0.164 | 0.167 30
32 0.200 | 0.199 | 0.200 | 0.216 | 0.186 | 0.199 | 0.180 | 0.178 | 0.181 32

So
So

40 0.263 | 0.264 | 0.250 | 0.280 | 0.251 | 0.269 | 0.244 | 0.245 | 0.248 40
50 0.375 | 0.373 | 0.360 | 0.400 | 0.361 | 0.390 | 0.354 | 0.359 | 0.361 50
60 0.524 | 0.523 | 0.516 | 0.560 | 0.516 | 0.547 | 0.505 | 0.517 | 0.518 60
70 0.721 | 0.727 | 0.726 | 0.770 | 0.723 | 0.766 | 0.710 | 0.733 | 0.733 70
80 1.000 | 1.001 | 1.010 | 1.060 | 1.005 | 1.058 | 0.988 | 1.025 | 1.023 80

90 1.360 | 1.368 | 1.360 | 1.430 | 1.380 | 1.442 | 1.354 | 1.412 | 1.410 90
95 1.580 | 1.594 | 1.640 | 1.636 | 1.562 | 1.677 | 1.581 | 1.649 | 1.647 95
100 ISCO M eS a2 SOOM mre eo il Siatull lv aterohein lial ste en jle Goi 1.918 100

FORCE OF VAPOR EXPRESSED IN MILLIMETRES FOR CENTIGRADE

TEMPERATURES.

Tetnper Force of Vapor according to renner
ature | j ature
of Air, Green- of Air,
oe Dalton. Gs | Biot. Daniell. uey = August. | Kaemtz. | Magnus. |Regnault. eels:

tions.

° s Millim. Millim. | Millim. Millim. Milli. Millim. | Millim. Millim. Millim. °
—20 aieiaits De aie 1.33 alse? iste « (ages 1.15 1.01 0.91 0.91 —20
—15 1.93 1.88 1.88 2.11 1.60 1.69 1.51 1.40 1.38 —15
—10 2.64 2.62 2.63 2.92 2.34 2.48 2.21 2.11 2.08 —10
— 5 3.66 3.66 3.66 4.01 3.33 3.56 3.20 3.11 3.13 — 5

0 5.08 5.06 5.06 5.49 4.72 5.05 4.58 4.52 4.60 0

{
are 6.93 6.95 6.95 7.42 6.60 7.08 6.45 6.47 6.53 aes
10 9.52 9.48 9.47 10.16 oe 9.99 9.00 9.13 9.16 10
15 12.88 12.85 12.84'| 13.79 12.62 13.44 12.38 12.68 12.70 15
20 oka 17.30 17.31 18.34 area 18.20 16.87 17.40 17.39 20
25 23.11 23.12 23.09 24.54 23.14 24.18 22.74 23.58 | 23.55 25
30 30.73 30.70 30.64 32.33 30.91 32.39 30.36 31.60 31.55 30
35 40.13 40.47 40.40 41.55 40.89 42.59 40.15 41.89 41.83 35
| 40 s| «ols Sb share 53.00 }yehee 53.64 Cs ee Sisheie 54.96 54.91 40
jeate : : |
B 155

XXIII.

192

WEIGHT OF VAPOR, IN GRAMMES, CONTAINED IN A CUBIC METRE OF SATURATED

AIR, AT TEMPERATURES BETWEEN —20° AND -++40° CENTIGRADE.— POUILLET.

RATED AIR, AT TEMPERATURES BETWEEN

Temper- Force Weight Temper- Force Weight Temper- Force Weight
ature of of of ature of of of ature of of of

| Dew-Point Vapor. Vapor. Dew-Point. Vapor. Vapor. Dew-Point. Vapor. Vapor.
'Centigrade.J Millim. Grammes. ||Centigrade.| Millim. Grammes. ||Centigrade.} Millim Gee

—20° 1.3 1.5 a1; 10.1 10.3 26° out 23.8

—15 1.9 al 12 10.7 10.9 27 25.9 25.1

-10 2.6 2.9 13 11.4 11.6 28 27.4 26.4

- 5 3.7 4.0 14 12.1 12.2 29 29.0 27.9

0 5.0 5.4 15 12.8 13.0 30 30.6 29.4

+1 5.4 5.7 16 13.6 13.7 31 32.4 31.0

|: Wes 5.7 6.1 17 14.5 14.5 32 34.3 32.6

3 6.1 6.5 18 15.4 15.3 33 36.2 34.3

| 4 6.5 6.9 19 16.3 16.2 34 38.3 36.2

5 6.9 7.3 20 17.3 17.1 35 40.4 38.1

6 TA Ted 21 18.3 18.1 36 42.7 40.2

7 7.9 8.2 22 19.4 19.1 37 45.0 42.2

8 8.4 8.7 23 20.6 20.2 3 47.6 44.4

9 8.9 gee 24 21.8 21.3 39 50.1 46.7

10 9.5 9.7 25 23.1 22.5 40 53.0 49.2
XXIV. WEIGHT OF VAPOR, IN GRAMMES, CONTAINED IN A CUBIC METRE OF SATU-

—25° AND -+36° CENTIGR. — KAEMTZ.

Temper- Force Weight Temper- Force Weight Temper- Force Weight
ature of of of ature of of of ature of of of
| Dew-Point. Vapor. Vapor. | Dew-Point.] Vapor. Vapor. Dew-Point. Vapor. Vapor.
Centigrade.} Millim. Grammes. | Centigrade. Millim. | Grammes_ |/Centigrade. Millim. Grammes.
| 25 0.77 0.93 || 4° 3.83 4.37 16° 14.28 14.97
—24 0.83 1.01 —3 4.11 4.70 17 15.20 15.84
ieee 0.90 1.10 —2 4.40 5.01 18 16.08 16.76
| —22 0.99 1.19 -1 4.71 5.32 19 17.01 17.75
—21 1.06 1.26 0 5.05 5.66 20 18.20 18.77
—20 1.15 1.38 +1 5.41 6.00 21 19.33 19.82
—19 1.26 1.47 2 5.80 6.42 22 20.51 20.91
—18 1.33 1.60 3 6.20 6.84 23 21075 22.09
—-17 1.44 1.74 4 6.63 7.32 24 23.01 23.36
—16 1.56 1.84 5 7.08 7.77 25 24.18 24.61
| =15 1.69 2.00 6 7.58 8.25 26 25.81 25.96
—l4 1.80 2.14 7 8.10 8.79 26 27.39 27.34
—13 1.96 2.33 8 8.64 9.30 28 28.96 28.81
—12 2.12 2.48 9 9.23 O86) ||| ae29 30.63 30.35
=—l1 2.30 2.63 10 9.90 10.57 30 32.39 31.93
—10 2.48 2.87 11 10.49 11.18 31 34.24 33.65
-—9 2.66 3.08 12 Poy 11.83 | 32 36.18 35.45
-— 8 2.86 3.30 13 11.86 12.57 | 33 38.21 37.20
ae as 3.09 3.53 14 12.66 13.33 34 40.38 39.12
; — 6 3.32 3.80 15 13.44 14.17 35 42.59 41.13
—5 3.56 4.08 16 14.28 14.97 36 44.96 43.17
B L060

193
XXV. FORCES OF VAPOR AND RELATIVE HUMIDITY,

CORRESPONDING TO THE DEGREES OF SAUSSURE’S HAIR-HYGROMETER, AT THE
TEMPERATURE OF 10° CENTIGRADE.

From the Experiments of Gay-Lussac.

The force of vapor is expressed in hundredths, the tension at full saturation being represented by 100.

———— = es os

Degrees of] Forse | otumunty ||Reerewet| Fowe | atumisty || Regssot| Fase | wtumtity
grometer. Vapor. as a na | grometer. Vapor. ae vara grometer. Vapor. re fl ne.

fe) Oo fe)

0 0.00 0.000 34 17.10 67

1 0.45 35 17.68 0.177 68

2 0.90 36 18.30 69

3 1.35 37 18.92 70 0.472
4 1.80 38 19.54 71

5 2.25 0.022 39 20.16 72 0.500
6 2.71 40 20.78 0.208 73

7 3.18 41 21.45 74

8 3.64 42 22.12 75 0.538
9 4.10 43 22.79 76

10 4.57 0.046 44 23.46 77
11 5.05 45 24.13 0.241 78

12 5.52 46 24.86 79

13 6.00 47 25.59 80 0.612
14 6.48 48 26.32 81

15 6.96 0.070 49 27.06 82
16 7.46 50 27.79 0.278 83 |
17 7.95 51 28.58 84 |
18 8.45 52 29.38 85 0.696
19 8.95 53 30.17 86

20 9.45 0.094 5A 30.97 87 |
21 9.97 55 31.76 0.318 88
22 10.49 56 32.66 89

23 11.01 57 33.57 90 0.791
24 11.53 58 34.47 91

25 12.05 0.120 59 35.37 92

26 12.59 60 36.28 0.363 93

27 13.14 61 37.31 94

28 13.69 62 38.34 95 0.891
29 14.23 63 39.36 96

30 14.78 0.148 64 40.39 97

31 15.36 65 41.42 0.414 98

32 15.94 66 42.58 99

33 16.52 67 43.73 100 1.000

194 XXVI.

ACB

FOR

DEDUCING THE RELATIVE HUMIDITY IN HUNDREDTHS, FROM THE INDICATIONS OF
SAUSSURE’S HAIR-HYGROMETER

Calculated from the Experiments of Melloni.

By M. T. HarcHens.

Tue Hair-Hygrometer of Saussure having been formerly used for long series
of observations, and being still employed by some meteorologists, notwithstanding
the imperfection of this instrument, on account of its giving directly the relative
humidity without calculation, it was desirable to ascertain the correspondence of the
degrees of that hygrometer with the relative humidity expressed in hundredths, as in
fhe preceding table. Though these instruments compared with each other, show
very often great discrepancies in their indications, yet a large number of them agree
sufficiently well with the experiments of Melloni, August, and others, to allow the
following table of comparison to be constructed, which table may be considered as
giving good approximations. For the calculation of it, Mr. Haeghens used the results
of Melloni, which agree also satisfactorily with a series of observations very care-
fully made by M. Deleros. See Annuaire Météorologique de la France, pour 1850.

RELATIVE HUMIDITY IN HUNDREDTHS.

Dauressiot Degrees of Saussure’s Hygrometer.

1
Saussure’s Units.
Hygrome-
ter.
Tene, i Oe |t Me] Be | Be a BO Ose man Same
a enaite Humidity | Humidity | Humidity | Humidity; Humidity Humidity Humidity | Humidity | Humidity
° 0 0 1 1 2 3 3 es 4 5
1 5 6 6 a 8 8 9 10 11 11
2 12 12 13 14 15 16 17 18 18 19
| 3 19 20 21 22 23 24 24 25 26 26
}

4 27 27 28 28 29 30 31 32 33 34 |
5 35 36 37 37 38

6 44 45 46 47 49

7 56 57 58 61

8 69 70 72

9 85

TABLE X2eVviir-.

Tue following Table shows the Relative Humidity, in hundredths, corresponding
to the degrees of Saussure’s Hair-Hygrometer, as determined by various physicists.
It is found in Kaemtz, Vorlesungen uber Meteorologie, page 100; also in the French
translation by Martins, Cours de Météorologie, page 80.

XXVI.

Degrees
of

Hair-
Hygrometer

100°
95
90
85
80

75
70
65
60
55

50
45
40
35
30

25
20
15
10
5
0

wl

HAIR-HYGROMETER,.

Saturation — 100.

RELATIVE HUMIDITY, CORRESPONDING TO THE DEGREES OF SAUSSURE’S

Relative Humidity according to

Gay-Lussac.

100.0
89.1
79.1
69.6
61.2

53.8
47.2
41.4
36.3
31.5

27.8
24.1
20.8
17.7
14.8

12.0
9.4
7.0
4.6
2.2
0.0

Prinsep.

100.0
88.7
78.2
68.3
59.2

50.6
43.6
Bifer
sles
26.3

21.8
Wie
14.3
11.4

Sali

ijeil
4.9
3.0
1.6
0.6
0.0

159

August.

100.0
94.0
86.0
79.0
71.0

64.0
56.0
48.0
41.0
30.0

31.0
27.0
23.0
19.0
16.0

13.0
10.0
7.0
4.0
2.0
0.0

Melloni.

Degrees

of
Hair- |
Hygrometer.

100°
95
90

—————— ee

197

AP PEN Dbx

THE HYGROMETRICAL TABLES,

B 161

199
TABLES

FOR

COMPARING THE QUANTITIES OF RAIN-WATER

Te three kinds of measures which are most in use for noting the quantities of
rain and melted snow, are the Centimetres and Millimetres in France, the Paris or
French inches and lines in Germany, and the English inches and decimals in Eng-
land, America, and also in Russia, the Russian foot being the same as the English
foot. The following tables will facilitate the comparison of these various measures
with each other.

A glance at the tables will show that the first column on the left contains the
numbers to be converted, and the heads of the following columns the fractions of
these numbers, or units, each of which is one tenth of those in the first column.
Shorter tables, at the bottom, give, when necessary, the value of proportional parts
still smaller than those found in the larger tables.

Example.

Let 18 Centimetres be converted into French inches and lines.

Take, in Table II., the line beginning with 10 Centimetres in the first column, fol-
low that line as far as the column headed 3 Centimetres, and there will be found the
number of 4 inches 9.63 lines, which is the corresponding value in French inches of
10 4- 3, or 13 Centimetres.

If the number is followed by a fraction, as for instance, 13.5 Centimetres, or 135

Millimetres, we find, —
: French Inches. Lines.
In the larger table 13. Centimetres = 4 .9,63

In the smaller table at the bottom 5 Millimetres = .2,216
Or 13.5 Centimetres = 4.11,846

When the measures which are to be compared are both subdivided into decimal
parts, the equivalents of the numbers greater than 9.9 may be found by moving the
decimal point.

Evample.

Let 346.7 Centimetres be converted into English inches.
In Table L., in the column headed 4, on the fourth line,
we find 3.4 Centimetres = 1.3386 English inches.
Moving the decimal point by two places we have
340 Centimetres = 133.86 English inches.
Then, in the column headed 7, on the
line beginning with 6, we find 6.7 Centimetres = 2.64
Making together 346.7 Centimetres = 136.50 English inches.
B 163

200 1. CONVERSION OF CENTIMETRES INTO ENGLISH INCHES AND DECIMALS.

1 Centimetre = 0.3937079 English Inch.

Millimetres.

Centi-
metres.

0. 1. 2. 3. 4. 5. 6. 7. 8. 9.

Eng. Inch. | Eng. Inch. | Eng. Inch. | Eng.Inch. | Eng. Inch.
0.0000 | 0.0394 | 0.0787 | 0.1181 | 0.1575
0.3937 | 0.4331 | 0.4724 | 0.5118 | 0.5512
0.7874 | 0.8268 | 0.8662 | 0.9055 | 0.9449
1.1811 | 1.2205 | 1.2599 | 1.2992 | 1.3386
1.5748 | 1.6142 | 1.6536 | 1.6929 | 1.7323
1.9685 | 2.0079 | 2.0473 | 2.0867 | 2.1260
2.3622 | 2.4016 | 2.4410 | 2.4804 | 2.5197
2.7560 | 2.7953 | 2.8347 , 2.3741 | 2.9134
3.1497 | 3.1890 | 3.2284 | 3.2678 | 3.3071
3.5434 | 3.5827 | 3.6221 | 3.6615 | 3.7009

Eng.Inch. | Eng.Inch. | Eng.Inch.| Eng.Inch | Eng. Inch.
0.1969 | 0.2362 | 0.2756 | 0.3150 | 0 3543
0.5906 | 0.6299 | 0.6693 | 0.7087 | 0.7480
0.9843 | 1.0236 | 1.0630 | 1.1024 | 1.1418
1.3780 | 1.4173 | 1.4567 | 1.4961 | 1.5355
1.7717 | 3.8111 | 1.8504 | 1.8898 | 1.9292 jj
2.1654 | 2.2048 | 2.2441 | 2.2835 | 2.3229
2.5591 | 2-5985 | 2.6378 | 2.6772 | 2.7166
2.9528 | 2.9922 | 3.0316 | 3.0709 | 3.1103
3.3465 | 3.3859 | 3.4253 | 3.1646 | 3.5040
3.7402 | 3.7796 | 3.8190 | 3.8583 | 3.8977

Il. CONVERSION OF CENTIMETRES INTO FRENCH INCHES, LINES, AND DECIMALS.
1 Centimetre = 0. inches 4.43296 Paris lines.

Units.

Centi-

metres. oO. | 1. 2, 3.

|

Fr.In. Lin. /Fr.In. Lin. |Fr.In. Lin.|Fr.In. Lin.|Fr.In. Lin. Fr.In. Lin. Fr.In. Lin.{Fr.In. Lin.|Fr.In. Lin.|Fr.In. Lin.

0 0. 0,00, 0. 4,43} 0. 8,87) 1. 1,30} 1. 5,73] 1.10,16) 2. 2,60) 2. 7,03) 2.11,46| 3. 3,90

10 3. 8,33] 4. 0,76) 4. 5,20) 4. 9,63) 5. 2,06] 5. 6,49) 5.10,93, 6. 3,36) 6. 7,79] 7. 0,23

20 Te 4,66 7. 9,09) 8. 1,53] 8. 5,96) 8.10.39] 9. 2,82) 9. 7,26 9.11,69)10. 4,12)10. 8,56

30 Al. 0,99 11. 542/11. 9,85)12. 2,29)12. 6,72 12.11,15 13. 3,59:13. 8,02/14. 0,45]/14. 4,89

40 14. 9,32 15. 1,75|15. 6,18 15.10,62 16. 3,05]16. 7,48)16.11,92.17. 4,35/17. 8,78)18. 1,22
|
|

50 18. 5,65 18.10,08 19. 2,51)19. 6,95|19.11,38]20. 3,81)20. 852521. 0,68/21. 5,11/21. 9,54

22. 1,98/22. 6,41/22.10,84/23. 3,28|23. 7,71|24. 0,14 24. 4,58 24. 9,01/25. 1,44/25. 5,87
70 25.10,31 26. 2,74/26. 7,17 26.11,61/27. 4,04]27. 8,17|28. 0,90 28. 5,34/28. 9,77\29. 2,20
80 29. 6,64 29.11,07 30. 3,50/30. 7,93)31. 0,37)/31. 4,8031. 9,23 32. 1,67|32. 6,10/32.10,53
36. 2,43/36 6,86
Centim. |Fr.In. Lin.
500

bo

Fr.In. Lin.
147.9,18

Centim. |Fr.In. Lin.
300 |110.9,89

Centim.

400

Fr.In. Lin. || Centim. |Fr.In. Lin.
36.11,30 200 |73.10.59

3.

184.8,48

90 33. 2,97/33. 7,40 33.11,83'34. 4,26 34. 8,70/35. 1,1335. 5,56 35.10.00
Centim.
100

Centi-
metres.

0. 1. 2. 6. de 8. 9.

a

Fr. Lines.|Fr. Lines.| Fr. Lines. |Fr. Lines. |Fr. Lines. |Fr. Lines. | Fr. Lines. | Fr. Lines. |Fr. Lines. |Fr. Lines.
0 0.00 4.43 8.87 13.30 17.73 22.16 | 26.60 | 31.03 35.16 | 39.90
10 44.33 48.76 | 53.20| 57.63 | 62.06 66.49 | 7093 | 75.36 79.79 | 84.23
20 88.66 | 93.09 | 97.53 | 101.96 | 106.39 | 110.82 | 115.26 | 119.69 | 124.12 | 128.56
30 182.99 | 137.42 | 141.85 | 146.29.) 150.72 | 155.15 | 159.59 | 164.02 | 168.45 | 172.89
40 177.32 | 181.75 | 186.18 | 190.62 | 195.05 | 199.48 | 203.92 | 208.35 | 212.78 | 217.22
50 221.65 | 226.08 | 230.51 | 234.95 | 239.38 | 243.81 | 248.25 | 252.68 | 257.11 | 261.54
60 | 265.98 | 270.41 | 274.84 | 279.28 | 283.71 | 288.14 | 292.58 | 297.01 | 301.44 | 305.87
70 310.31 | 314.74 | 319.17 | 323.61 | 328.04 | 382.47 | 336.90 | 341.34 | 345.77 | 350.20
80 | 354.64 | 359.07 | 363.50 | 367.93 | 372.37 | 376.80 | 381.23 | 385.67 | 390.10 | 394.53
90 398.97 | 403.40 | 407.83 | 412.26 | 416.70 | 421.13 | 425.56 | 430.00 | 434.43 438.86

LINES AND DECIMALS.

—_—— | = | | | Ss] | | | |

Fr. Lines. | Fr. Lines.|Fr. Lines.|Fr. Lines. |Fr. Lines. | Fr. Lines.|Fr. Lines. |Fr. Lines. |Fr. Lines.|Fr. Lines.
0.0 0.443 0.887 1.330 ais: |) 2-216 2.660 3.103 3.546 3.990

B 164

III.

CONVERSION OF ENGLISH INCHES INTO CENTIMETRES.

1 English Inch = 2.53995 Centimetres.

201

English
Inches.

10
20
30
40
50
60
70
80
90
100

110
120
130
140
150
160
170
180
190

200

0.

Centim.

0.00
25.40
50.80
76.20

101.60
127.00
152.40
177.80
203.20
228.60
254.00

279.39
304.79
330.19
355.59
380.99
406.39
431.79
457.19
482.59
507.99

0.

Centim.

0.000

1.

Centim.
2.54
27.94
53.34
78.74
104.14
129.54
154.94
180.34
205.74
231.14
256.54

281.93
307.33
332.73
358.13
383.53
| 408.93
434.33
459.73
485.13
510.53

1.

Centim.

0.254

IV. CONVERSION

56.
65.
75.
84. 5,35
Eng. Inch.

|
37. 6,38,
|

0,76

100

FrIn. Lin. Fr.In. Lin,|Fr.In. Lin.
0. 0,00) 0.11,26) 1.10,52
9. 4,5910. 3,85/11.
18. 9,19 19. 8,45
28. 1,78 29. 1,04/30.
38. 5,64/39.
46.10,97 47.10,23/48.
3,57 57.
8,16 66.
76.
‘85.

20.

2,53 58.
7,42 67.
0,02 76.11,28
4,61 86. 3,87
Fr.In. Lin.
93.9,95

2.

Centim.
5.08
30.48
55.88
81.28
106.68
132.08
157.48
182.88
208.28
233.68
259.08

284.47
309.87
335.27
360.67
386.07
411.47
436.87
462.27
487.67
513.07

2.

Centim.

0.508

3.

Centim.
7.62
33.02
58.42
83.82
109.22
134.62
160.02
185.42
210.82
236.22
261.62

287.01
312.41
337.81
363.21
388.61
414.01
439.41
464.81
490.21
515.61

3.

Centim.

0.762

4.

Centim.
10.16
35.56
60.96
86.36

111.76

137.16

162.56

187.96

213.36

238.76

264.16

289.55
314.95
340.35
365.75
391.15
416.55
441.95
467.35
492.75
518.15

5.

Centim.
12.70
38.10
63.50
88.90

114.30

139.70

165.10

190.50

215.90

241.30

266.70

292.09
317.49
342.89
368.29
393.69
419.09
444.49
469.89
495.29
520.69

Tenths of an Inch.

6.

Centim.
15.24
40.64
66.04
91.44

116.84

142.24

167.64

193.04

218.44

243.84

269.24

294.63
320.03
345.43
370.83
396.23
421.63
4417.03
472.43
497.83
523.23

6.

Centim.
1.524

7

Centim.
17.78
43.18
68.58
93.98

119.38

144.78

170.18

195.58

220.98

246.38

271.78

297.17
322.57
347.97
373.37
398.77
424.17
449.57
474.97
500.37
525.77

7

Centim.

1.778

Centim.
20.32
45.72
71.12
96.52

121.92

147.32

172.72

198.12

223.52

248.92

274.32

299.71
325.11
350.51
375.91
401.31
426.71
452.11
477.51
502.91
528.31

8.

Centim.

2.032

9.

Centim.
22.86
48.26
73.66
99.06

124.46

149.86

175.26

200.66

226.06

251.46

276.85

302.25
327.65
353.05
378.45
403.85
429.25
454.65
480.05
505.45
530.85

9.

Centim.

2.286

OF ENGLISH INCHES INTO FRENCIi INCHES AND LINES.
1 English Inch =O. inches 11.2595 Paris lines.

3,11
7,71
0,30
4,90
9,49
2,09
6,68

Eng.Inch.
200

Fr.In. Lin.
2. 9,78
12. 2,37
21. 6,97/2
30.11,56
40. 4,16
49. 8,75)5
99. 1,35)
68. 5,94)
77.10,54,
87. 3,13 88.
Fr.In. Lin. |/Eng. Inch.

3.

Units.

6.

7

Fr. In. Lin.{Fr.In. Lin./Fr.In. Lin. |Fr.In. Lin.
5. 7,56 6. 6,82
13. 1,63/14. 0,8915. 0,15 15.1141

3. 9,04

4. 8,30)

Fr.In. Lin.
281.5,85

Tenths of an Inch.

. 8,01)51. 7,27/52. 6,53)
\ oe 60.11,87 61.11,13 62.10,39

400

2. 6,23)23. 5,49 24. 4,75)25.
2132.10,08 33. 9,34 34.
. 342142. 2,68/43. 1,94 44.

1,20
53. 5,79

20/70. 4,46 71. 3,7272. 2,98
he 9,06 80. 8,3281. 7,58
2,39)89. 1,65 90. 0,9191. 0,17
Eng. Inch.

Fr.In Lin.
375.3580

4,011:
8,60):

8.

Fr.In. Lin.

7. 6,08
16.10,67
Rees Ait

. 0,46
9-05
. 9,65
73.
82. 6,84
91.11,43
Eng.Inch.
500

. 7,86):

2,24/74.

9.

Fr.In. Lin. ||

8. 5,34]|
17. 9,93]|
27 2,08
alga
5.11,72
- 4,31
© 1S50l
1,50
- 6,10
92.10,69
Fr. In. Lin.
469.1,75

202

160 |, 433.12
170 || 460.19
180 || 487.26
190 || 514.33

| 541.40

0.

Centim.
0 0.000
il 0.226
2 0.451
3 0.677
4 0.902

5 1.128
6 1.353
7 1.579
8
oy

1.805
2.030

2.256
2.481
|| 2.707

French

Inches. | 0.
Centim.
0 0.00
10 27.07
20 54.14
30 81.21
40 108.28
50 135.35
60 162.42
70 189.49
80 216.56
90 243.63
100 270.70
110 297.77
120 324.84
130) |) 351.91
140 | 378.98
150 | 406.05

1.

Centim.
2-71
29.78
56.85
83.92
110.99
138.06

165.13
192.20
219.27
246.34
273.41

300.48
327.55
354.62
381.69
408.76

435.83
462.90
489.97
517.04
544.11

1.

Centim.
0.023
0.248
0.474
0.699
0.925

1.150
1.376
1.602
1.827
2.053

2.278
2.504

| 2.730

V. CONVERSION OF FRENCH INCHES INTO CENTIMETRES.

1 French Inch = 2.7070 Centimetres.

2.

Centim.
5.41
32.48
59.55

86.62 |

113.69
140.76

167.83
194.90
221.97
249.04
276.11

303.18
330.25
357.32
384.39
411.46

438.53
465.60
492.67
519.74

546.81

3.

Centim.
8.12
35.19
62.26
89.33
116.40
143.47

Units.

4. 3.

Centim.
13.53
40.60
67.67
94.74

121.81

148.88

Centim.

10.83
37.90
64.97
92.04
119.11
146.18

172.25
200.32
227.39
254.46
281.53

175.95
203.02
230.09
257.16
284.23

308.60
335.67
362.74
389.81
416.88

311.30
338.37
365.44
392.51
419.58

446.65
473.72
500.79
527.86
554.93

443.95
471.02
498.09
525.16
552.23

6. 7

Centim.
18.95
46.02
73.09

100.16

127.23

154.30

Centim.
16.24
43.31
70.35
97.45

124.52

151.59

178.66
205.73
232.80
259.87
286.94

181.37
208.44
235.51
262.58
289.65

314.01
341.08
368.15
395.22
422.29

316.72
343.79
370.86
397.93
425.00

452.07
479.14
506.21
533.28
560.35

449.36
476.43
503.50
530.57
557.64

8.

Centim.
21.66
48.73
75.80

102.87

129.94

157.01

184.08
21015
258.22
265.29
292.36

319.42
346.49
373.56
400.63
427.70

454.77
481.84
508.91
535.98
563.05

CONVERSION OF FRENCH LINES INTO CENTIMETRES.

1 French Line = 0.22558 Centimetre.

2.

Centim.
0.045
0.271
0.496
0.722
0.947

1.173
1.399
1.624
1.850
2.075

2.301
2.527

| 2.752

Be

Centim.

0.068
0.293
0.519
0.744
0.970

1.196
1.421
1.647
1.872
2.098

2.324
2.549
2.775

Tenths of a Line.

4. de
Centim. | Centim.
0.090 | 0.113
0.316 | 0.338
0.541 | 0.564
0.767 | 0.790
0.993 | 1.015
1.218 | 1.241
1.444 | 1.466
1.669 | 1.692
1.895 | 1.917
2A20) | 2.143
2.346 | 2.369
2.572) || 2.594
2.797 | 2.820

6. Ze

Centim. | Centim.
0.135 | 0.158
0.361 0.383
0.587 | 0.609
0.812 0.835
1.038 1.060

1.263 | 1.286

1.489 | 1.511
1.714 | 1.737
1.910 | 1.963

2.166 | 2.188

2.414
2.639
2.865

2.391
2.617
2.842

8.

Centim.
0.180
0.406
0.632
0.857
1.083

1.308
1.554
1.760
1.985
2.211

2.436
2.662
2.887

9.

Centim.
24.36
51.43
78.50

105.57

132.64

159.71

186.78
213.85
240.92
267.99
295.06

322.13
349.20
376.27
403.34
430.41

457.48
484.55
511.62
538.69
565.76

Centim.
0.203
0.429
0.654
0.880
1.105

1.331
1.557
1.782
2.008
2.233

2.684

2.459
2.910 |

166

a ee eS ee

a cp tree

Pe

Ee

ee

VI. CONVERSION OF FRENCH INCHES INTO ENGLISH INCHES AND DECIMALS. 908

1 French Inch = 1.065765 English Inch.

Units.

Brench) |: — = —— ae ss SS
Inches. ]

0. 1. 2. 3. 4. de 6. 7. 8. 9.

Eng Inch. Eng. Inch. Eng.Inch.|Eng.Inch. Eng. Inch.f{Eng.Inch ‘Eng Inch. 'Eng.Inch. Eng.Inch. Eng.Inch.
0.000 1.066| 2.132] 3.197) 4.263 5.329| 6.395) 7.460) 8.526, 9.592
10.658, 11.723, 12.789) 13.855) 14.921] 15.986) 17.052) 18.118 19.184| 20.250
21.315, 22.381) 23.447 24.513) 25.578] 26.644 27.710| 28.776 29.841, 30.907
31.973 33.039, 34.104] 35.170, 36.236 37.302) 38.368) 39.433) 40.499) 41.565
42.631 43.696 44.762 45.828) 46.894) 47.959) 49.025 50.091) 51.157 52.222
53.288 54.354 55.420) 56.486 57.551] 58.617) 59.683) 60.749) 61.814) 62.880

63.946 65.012 66.077, 67.143 68.209] 69.275) 70.340, 71.407) 72.472 73.538

|
74.604) 75.669 76.735 77.801) 78.867} 79.932, 80.998. 82.064 83.130 84.195
85.261) 86.327, 87.393) 88.458) 89.524] 90.590 91.656 92.722) 93.787, 94.853
95.919) 96.985 98.050) 99.116 100.182] 101.248 102.314) 103.379 104.445 105.511)!

|

| 106.576 107.642 108.708 109.774 110.840] 111.905 112.971 114.037, mee 116.168

| |

117.234 118.300 119.366 120.431 121.4971 122.563) 123.629) 124.695 125.760 126.826
127.892, 128.958 130.025 131.089 132.155 133.221) 134.286) 135.352) 136.418, 137.484
138.549 139.615 140.681) 141.747 142.813 143.878 144.944 146.010 147.076, 148.141
149.207 150.273. 151.339 152.404 153.470 154.536 155.602) 156.667 157.733 158.799

| 159.865 160.931 161.996 163.062 164.128} 165.194 166.259 167.325 168.391 169.457

170.522 171.588 172.654) 173.720 174.785] 175.851 176.917) 177.983. oak 180.114
| 181.180) 182.246 183.312) 184.377 185.443 186.509] 187.575) 188.640, 189.706. 190.772
| 191.838 192.903 193.969 195.035 196.101 197.167| 198.232 199.298 200.364 201.430
902.495 203.561 204.627 205.693 206.758 | 207.824 208.890 209.956 211.021) 212.087

213.153 244-213) 209-255 216.350 217.416} 218.482 219.548 220.613 221.679 222.745
| | |

CONVERSION OF FRENCH LINES INTO ENGLISH INCHES.

1 French Line = 0.088814 English Inch.

Tenths of a Line.

Bench ; 1
OMe p cern ee Gee ka (Se hi Gal Fe tc: ee

|

\Eng.Inch. Eng.Inch. Eng.Inch. Eng. Inch. |Eng Inch. Eng.Inch. Eng Inch.|Eng.Inch \Eng.Inch. Eng Inch.
0 0.0000 | 0.0089 0.0178 | 0.0266 | 0.0355 0.0444 | 0.0533 | 0.0622 | 0.0711 | 0.0799
1 0.0888 0.0977 | 0.1066 | 0.1155 | 0.1243 | 0.1332 | 0.1421 0.1510 | 0.1599 | 0.1687
2 0.1776 0.1865 0.1954 | 0.2043 | 0.2132 | 0.2220 | 0.2309 0.2398 | 0.2487 | 0.2576
3 0.2664 | 0.2753 | 0.2842 | 0.2931 | 0.3020 0.3108 | 0.3197 | 0.3286 | 0.3375 | 0.3464
4 0.3553 | 0.3641 0.3730 | 0.3819 | 0.3908 | 0.3997 0.4085 | 0.4174 | 0.4263 | 0.4352
5

0.4441 0.4530 0.4618 0.4707 | 0.4796 | 0.4885 | 0.4974 | 0.5062 | 0.5151 0.5240

6 0.5329 | 0.5418 0.5506 | 0.5595 | 0.5684} 0.5773 0.5862 | 0.5951 | 0.6039 | 0.6128
7 | 0.6217 | 0.6306 0.6395 0.6483 | 0.6572 | 0.6661 0.6750 | 0.6839 0.6927 | 0.7016
8 | 0.7105 | 0.7194 | 0.7283 | 0.7372 | 0.7460 } 0.7549 0.7638 | 0.7727 | 0.7816 0.7904
9

| |
0.7993 | 0.8082 | 0.8171 | 0.8260 | 0.8349 | 0.8437 | 0.8526 | 0.8615 0.8704 | 0.8793

10 0.8881 0.8970 0.9059 | 0.9148 | 0.9237 | 0.9325 0.9414 | 0.9503 0.9592 0.9681

11 0.9770 0.9858 0.9947 | 1.0036 | 1.0125 ] 1.0214 | 1.0302 | 1.0391 | 1.0480 | 1.0569
12 1.0658 | 1.0746 | 1.0835 | 1.0924 | 1.1013 | 1.1102 | 1.1191 | 1.1279 | 1.1368 | 1.1457

De

B 167

BAD

METEOROLOGICAL TABLES.

SERIES IIL

BAROMETRICAL TABLES.

apie, I.
Il.
IU.
IV.

Gs

oe

oe

ce

oe

“© XXVIL.

& XXVIII.

Cc

Wile
VIL.
VUl.

IX.
X,
XI.
XIU.
XIII.
XIV.
XV.
XVI.

XVII.
XVIII.
XIX.
XX.
XXI.

XX.
XXIII.
XXIV.

XXV.

XXVI.

207
CON TE Ns.

(The figures refer to the folio at the bottom of the page.)

For Comparing the different Barometrical Scales.

Comparison of the English and the Metrical Barometers 3 Loeb
Comparison of the English and the Old French Barometers __. 15
Comparison of the Metrical and the English Barometers i |
Comparison of the Metrical and the Old French Barometers : 27
Comparison of the Old French and the English Barometers woo
Comparison of the Old French and the Metrical Barometers. 39
Comparison of the Russian and the Metrical Barometers A . 46
Comparison of the Russian and the Old French Barometers ‘ 48

For Comparing Barometrical Differences.

Conversion of English Inches into Millimetres —. é ‘ . 53
Conversion of English Inches into French or Paris Lines : 5S
Conversion of Millimetres into English Inches _. A oe Od
Conversion of Millimetres into French or Paris Lines : : 55
Conversion of French or Paris Lines into Millimetres ‘ «5G
Conversion of French or Paris Lines into English Inches ; 56
Conversion of Russian Half-Lines into Millimetres 5 : nao
Conversion of Russian Half-Lines into Paris Lines : : Bd

For Reducing Barometrical Observations to the Freezing Point.

Reduction of English Barometers with Brass Scales. : . 65
Reduction of English Barometers with Glass, or Wooden Scales 72
Reduction of the Metrical Barometer, by Delcros : . = wile
Reduction of the Metrical Barometer, by Haeghens : : 81

Reduction of the Old French Barometer, by Kaemtz . : . 124

For Correcting Barometrical Observations for Capillary Action.

Correction to be applied to English Barometers for Capillary Action 131
Normal Height of Meniscus in Millimetres, by Delcros — . 2 del
Correction to be applied to Metrical Barometers for Capillary Action,
by Delcros : . ‘ ; : : : ; ~ - lee
Depression of the Barometrical Column due to Capillary Action. —
Pouillet . : : ‘ : : : , : :
Depression of the Barometrical Column due to Capillary Action. —
Gehler’s Worterb. —. : ‘ . ; é : ~ 83
Depression of the Barometrical Column due to Capillary Action,
reduced from Delcros’ Table . , : : : eee ls4:
Depression of the Barometrical Column due to Capillary Action. —

Erland Cems Lon eR Teo kn Nigam bee
3

133

209

COMPARISON

OF

Pe BAROMEDRIOCAL SCA CES,

OR

TAD LES

FOR CONVERTING THE INDICATIONS OF THE ENGLISH, METRICAL, OLD FRENCH,
AND RUSSIAN BAROMETERS INTO EACH OTHER.

co

wlkt? . F RA oa, ee yay

i inh Ps ws
fo og: Higta r a Mp eno
CRE ee ie CLO a

211

COMP ACK. bs OUN

OF

THE BAROMETRICAL SCALES.

Tne following tables are intended for converting into each other the four most
tmportant Barometrical Scales. ‘They are sufficiently detailed to save the labor of
any calculation or even of interpolation for the ordinary wants of Meteorology. But
before maxing use of them, for comparing the observations taken with barometers of
different scales, it is necessary to reduce the observed heights to the temperature
of the freezing point, or to any other temperature, provided it be the same for all,
by means of the tables calculated for this purpose, and which will be found below.
The reason of it may be readily understood.

The length of the bars of metal, or of other substances, which represent the stand
ard measures of length which obtain among different nations, varying with the tem-
perature, it was necessary to determine a fixed point of temperature at which they
really ought to have the length adopted as the standard unit of measure. This
temperature is the normal temperature of the standard, and the length of the stand-
ard-bar, at this temperature, is the érue length of it.

If the normal temperature of the various standards used for dividing Barometrical
Scales were the same, the heights of the barometrical column, taken with these
scales, could be compared directly, provided the scales be made of the same sub-
stance, brass, for instance, because their variations above or below this normal tem-
perature would remain parallel with each other. But unfortunately it is not so.
The English Yard is a standard at the temperature of 62° Fahrenheit ; the Old
French Toise, at 13° Reaumur; the Metre, at the freezing point, or zero Centigrade.
Thus metallic rods intended to represent these various units of measure give the true
or standard length only when at these respective temperatures ; at any other tem-
perature they are longer or shorter than the standard, and their subdivisions, inches,
lines, or millimetres, partake of the error.

It is obvious, therefore, that the barometrical heights, taken with different scales,
cannot be compared direct/y by means of the following tables, which give the re-
lation between these scales at their respective normal temperatures. For suppose
the temperature of the three barometers to be the freezing point, or 32° Fahrenheit,

C i

Die COMPARISON OF THE BAROMETRICAL SCALES.

the scale of the Metrical Barometer alone will actually represent the standard length,
and the millimeters will have the true length; while the inches and lines of the Old
French and of the English Barometers will be too short, causing thus the barometrical
column to appear too high. If the temperature of the instruments be 62° Fahrenheit,
the divisions of the English Barometer will have the true standard length, and those
of the Old French Barometer nearly so ; but the millimeters of the Metrical Barome-
ter will be too long, causing the barometrical column to appear too low. It is to
neutralize the effect of those inequalities arising from the expansion of the scale
that it is necessary, before comparing the observations taken with the three barome-
ters,to reduce them to the same temperature. ‘This is done by means of the tables
above mentioned, for reducing the barometer to the freezing point, which suppose
the scales to be of brass from top to bottom, and which take into account the expan-
sion or contraction they undergo by the variations of temperature.

But in doing so, we must be aware that the accuracy of the comparison depends
in part upon the correctness of the indications of the attached thermometers, which
determine the amount of the correction to be applied for reducing the barometers to
the freezing point. If the thermometers do not agree, an error is introduced which will
affect the height of the reduced columns, and the final comparison. Therefore the
correction of the attached thermometers ought to be ascertained and applied to tnem
before the reduction is made ; or if this correction is unknown, it will be well to place
the instruments to be compared in the most favorable conditions for taking the same
temperature, and then to take the temperature given by one of the thermometers to
reduce both barometers. If the correction of the attached thermometer has not been
applied before the reduction, it will be contained, after the reduction, in the total cor-
rection of the instrument. If it be so, this circumstance must be indicated.

In computing the following tables, the value of the Metre, as determined by Capt.
Kater, (Philosoph. Transact. for 1818, p. 109, and Baily’s Astronomical Tables, p.
192,) has been adopted, viz. 1 Metre, at 0° Centigrade = 39.87079 English inches,
at 62° Fahrenheit. The relation of the Metre (legal) to the Old French system of
measures is known to be 1 Metre = 443.296 French or Paris lines. From these
equations are derived the elements used in the computations, which are found at the
head of each table.

Besides the larger Tables I.— VIL, a set of smaller ones, Tables IX.—XVI., has
been added, which will be found useful for comparing Barometrical differences, such
as ranges, amount of variation in a given time, &c., expressed in measures of differ-
ent scales, in which only small quantities occur that are not found in the large tables.

213

uke

COMPARISON

OF

THE ENGLISH BAROMETER

WITH

THE METRICAL AND THE OLD FRENCH BAROMETERS,
OR

TABLES

FOR CONVERTING ENGLISH INCHES INTO MILLIMETRES, AND INTO FRENCH OR
PARIS LINES AND DECIMALS ;

GIVING THE VALUES CORRESPONDING TO EVERY TENTH OF AN INCH, FROM 9
TO 19 INCHES; AND TO EVERY HUNDREDTH, FROM
19 TO 31.5 ENGLISH INCHES.

214

USE OF TABLE I.

Example.

Tue English Barometer reads 20.657 inches. What would be the corresponding
height in the Metrical Barometer ?

In Table [., first column on the left, look out the line of 20 inches 6 tenths ; on
that line, in the sixth column, headed 5 hundredths, is found the value in milli-
metres for

20.65 inches = 524.50 millimetres.
At the bottom of the page, for 0.007 “ = 0.18 +
Or for 20.657 “ =52468 «

which would be the reading of the Metrical Barometer.

This example may serve for all tables, throughout the volume, which are constructed

on the same plan.

I. COMPARISON OF THE ENGLISH AND METRICAL BAROMETERS.

1 English Inch = 25.39954 Millimetres.

English
Inches.

tenths

19.0

Pw De oO CONIA M m oO bo

weonmnsta an

Millim. | Millim.

228.60
254.00
279.39
304.79
330.19

355.59
380.99
406.39
431.79
457.19

231.14
256.54
281.93
307.33
332.73

398.13
383.53
408.93
434.33
459.73

Millim.
233.68
259.08
284.47
309.87
335.27

360.67
386.07
411.47
436.87
462.27

Millim.
236.22
261.62
287.01
312.41
337.81

363.21
388.61
414.01
439.41
464.81

Millim.
233.76
264.16
289.55
314.95
340.35

365.75
391.15
416.55
441.95

467.35

Millim.
241.30
266.70
292.09
317.49
342.89

368.29
393.69
419.09
444.49
469.89

Millim.
243.84
269.24
294.63
320.03
345.43

370.83
396.23
421.63
447.03
472.43

Millim.
246.38
271.78
297.17
322.57
347.97

373.37
398.77
424.17
449.57
474.97

Millim.
248.92
274.32
299.71
325.11
350.51

375.91
401.31
426.71
452.11
477.51

Millim

251.46
276.85
302.25
327.65
393.05

378.45
403.85
429.25
454.65
480.05

Tenths of an Inch. |
0. 1. 2. 3. 4. De 6. We 8. 9. |

Hundredths of an Inch.

0.

Millim.
482.59
485.13
487.67
490.21
492.75

495.29
497.83
500.37
502.91
505.45

507.99
510.53
513.07
515.61
518.15

520.69
523.23
525.77
528.31

530.85

1.

Millim.

482.85
485.39
487.93
490.47
493.01

495.55
498.08
500.62
503.16
505.70

508.24
510.78
513.32
515.86
518.40

520.94
523.48
526.02
528.56
531.10

2.

Millim.
483.10
485.64
488.18
490.72
493.26

495.80
498.34
500.88
503.42
505.96

508.50
511.04
513.58
516.12
518.66

521.20
523.74
526.28
528.82

531.36

2.

0.05

3.

0.08

De

Millim.
483.35
485.89
488.43
490.97
493.51

496.05
498.59
501.13
503.67
506.21

508.75
511.29

513.83
516.37
518.91

Millim
483.61

488.69

a | s

486.15

491.23 |
493.77 |

496.31 |
498.85 |
501.39 |
503.93 |
506.47 |

509.01 |
511.55 |
514.09 |
516.63 |
519.17 |

521.71 |
524.25 |
526.79 4
529.33 |
531.87 |

} Millim.
483.86
486.40
1 488.94
491.48
494.02

496.56
499.10
501.64
504.18
506.72

509.26
511.80
514.34
516.88
519.42

521.96
524.50
527.04
529.58
532.12

Thousandths of an Inch.

4.

0

-10

3.

0.13

6.

Millim

484.12
486.66
489.20
491.74
494.28

496.81
499.35
501.89
504.43
506.97

509.51
512.05
514.59
517.13
519.67

522.21
524.75
527.29
529.83
532.37

6.

0.15

7.

Millim

4814.37
486.91
489.45
491.99
494.53

497.07
499.61
502.15
504.69
507.23

509.77
512.31
514.85
517.39
519.93

522.47
525.01
527.55
530.09
532.63

7.

0.18

1]

—_—_--_——

8.

Millim
484.62
487.16
489.70
492.24
494.78

497.32
499.86
502.40
504.94
507.48

510.02
512.56
515.10
517.64
520.18

or Or Or
ww wo

a

0.20

9.

Millim.
484.88
487.42
489.96
492.50
495.04

497.58
500.12
502.66
505.20
507.74

|
|

510.28
512.82
515.36
517.90
520.44

or Or Or
2 Ww

or
ws

or
ow ©

9.

0.28

————————————

COMPARISON OF THE ENGIJISH AND METRICAL BAROMETERS.

I.

Millim.

533.64
536.18
538.72
541.26
543.80

aww an o
Or

559.04
561.58
564.12
566.66
569.20

571.74
574.28
576.82
579.36
581.90

584.44
5986.98
589.52
592.06
594.60

597.14
599.68
602.22
604.76
607.30

609.84
612.38
614.92
617.46
620.00

2.

Millim.
533.90
536.44
538.98

3.

Millim.
534.15
536.69
539.23

541.52
544.06

546.60
549.14
551.68
954.22
556.76

559.30
561.84
564.38
566.92
569.46

572.00
974.54
577.08
579.62
582.16

584.70
587.24
589.78
592.32
594.86

597.40
599.94
602.48
605.02
607.56

610.10
612.64
615.18
617.72
620.26

541.77

444.31

546.85
549.39
551.93
554.47
557.01

559.55
562.09
564.63
567.17
569.71

572.25
574.79
577.33
979.87
582.41

584.95
587.49
590.03
592.57
595.11

597.65
600.19
602.73
605.27
607.81

610.35
612.89
615.43
OMT OT
620.51

4. a

Millim.
534.66
537.20
539.74
542.28
544.82

Millim.
534.41
536.95
539.49
542.03
544.57

585.46
588.00
590.54
593.08
595.62

598.16
600.70
603 24
605.78
608.32

610.86
613.40
615.94
618.48
621.02

6.

Millim.
534.91
537.45
539.99
542.53
545.07

or or
aD
stom
mB OW DD w
Iwoare

583.17

585.71
588.25
590.79
993.33
595.87

598.41
600.95
603.49
606.03

611.11
613.65
616.19
618.73

608.57

7

Millim.
535.17
537.71
540.25
542.79
545.33

568.19
570.73

573.27
575.81
578.35
580.89
583.43

585.97
588.51
591.05
593.59
596.13

598.67
601.21
603.75
606.29
608.83

611.37
613.91
616.45
618.99

8.

Millim.
535.42
537.96
540.50
543.04
545.58

548.12

550.66-

553.20
555.74
558.28

560.82
563.36
565.90
568.44
570.98

573.52
576.06
578.60
581.14
583.68

586.22
588.76
591.30
593.84
596.38

598.92
601.46
604.00
606.54
609.08

611.62
614.16
616.70
619.24

621.27 | 621.53 | 621.78

- = 1
Hundredths of an Inch. |
English ee

9.

Millim.
535.68
538 22
540.76
543.30

566.16
568.70
571.24

573.78
576.32
578.86
581.40
583.94

586.48
589.02
991.56
594.10
596.64

599.18
601.72
604.26
606.79
609.33

611.87
614.41
616.95
619.49
622.03

216
Inches and
tenths. O.
| Millim
'24.0 533.39
| 1 || 535.93
2 538.47
3 541.01
4 543.55
5 546.09
6 548.63
| 7 551.17
8 553.71
9 556.25
22.0 || 558.79
1 561.33
2 563.87
3 566.41
4 568.95
5 571.49
| 6 574.03
a 576.57
8 579.11
9 581.65
| 23.0 584.19
1 586.73
2 589.27
| 8 591.81
4 594.35
5 596.89
6 599.43
7 601.97
8 604.51
9 607.05
|
24.0 609.59
1 612.13
2 614.67
3 617.21
4 619.75
=
|

Be

0.08

4.

0.10

i Hundredths of an Inch.
English

COMPARISON OF THE ENGLISH AND METRICA%. BAROMETERS,

ee and
> || @- | 1. Sel eae ee. hy Gs %. a. | "oe
Millim | Millim. Millim. Millim. | Millim. | Millim. Millim. Millim. Millim,.
24.5 622.29 | 622.54 623.05 | 623.30 {623.56 | 623.81 | 624.07 | 624.32 | 624.57
6 624.83 | 625.08 625.59 | 625.84 1626.10 | 626.35 | 626.61 | 626.86 | 627.11
0 627.37 | 627.62 628.13 | 628.38 | 628.64 | 628.89 | 629.15 | 629.40 | 629.65
8 629.91 | 630.16 630.67 | 630.92 |631.18 | 631.43 | 631.69 | 631.94 | 632.1)
9 632.45 | 632.70 633.21 | 633.46 ] 633.72 | 633.97 | 634.23 | 634.48 | 634.73
25.0 634.99 | 635.24 637.75 | 636.00 1636.26 | 636.51 | 636.77 | 637.02 | 637.27
1 637.53 | 637.78 638.29 | 638.54 1638.80 | 639.05 | 639.31 | 639.56 | 639.51
2 640.07 | 640.32 640.83 | 641.08 ]641.34 | 641.59 | 641.85 | 642.10 | 642.35
3 642.61 | 642.86 643.37 | 643.62 1643.88 | 644.13 | 644.39 | 644.64 | 644.89
4 645.15 | 645.40 645.91 | 646.16 1646.42 | 646.67 | 646.93 | 647.18 | 647.43
5 647.69 | 647.94 648.45 | 648.70 }648.96 | 649.21 | 649.47 | 649.72 | 649.97
6 650.23 | 650.48 650.99 | 651.24 1651.50 | 651.75 | 652.01 | 652.26 | 652.51
a 652.77 | 653.02 653.53 | 653.78 1654.04 | 654.29 | 654.55 | 654.80 | 655.05
8 655.31 | 655.56 656.07 | 656.32 1656.58 | 656.83 | 657.09 | 657.34 | 657.59
| 9 657.85 | 658.10 658.61 | 658.86 1659.12 | 659.37 | 659.63 | 659.88 | 660.13
|
i! 26.0 660.39 | 660.64 661.15 | 661.40 1661.66 | 661.91 | 662.17 | 662.42 | 662.67
1 662.93 | 663.18 663.69 | 663.94 {664.20 | 664.45 | 664.71 | 664.96 | 665.21
2 665.47 | 665.72 666.23 | 666.48 | 666.74 | 666.99 | 667.25 | 667.50 | 667.75
3 668.01 | 668.26 668.77 | 669.02 |669.28 | 669.53 | 669.79 | 670.04 | 670.29
4 670.55 | 670°80 671.31 | 671.56 1671.82 | 672.07 | 672.33 | 672.58 | 672.83
5 673.09 | 673.34 673.85 | 674.10 ] 674.36 | 674.61 | 674.87 | 675.12 | 675 37
6 675.63 | 675.88 676.39 | 676.64 |676.90 | 677.15 | 677.41 | 677.66 | 677.91
7 678.17 | 678.42 678.93 | 679.18 |679.44 | 679.69 | 679.95 | 680.20 | 680.45
| 8 680.7] | 680.96 681.47 | 681.72 |681.98 | 682.23 | 682.49 | 682.74 | 682.99
9 683.25 | 683.50 684.01 | 684.26 | 684.52 | 684.77 | 685.03 | 685.28 | 685.53
27.0 685.79 | 686.04 686.55 | 686.80 ]687.06 | 687.31 | 687.57 | 687.82 | 688 07
1 688.33 | 688.58 689.09 | 689.34 | 689.60 | 689.85 | 690.11 | 690.36 | 690.61
| 2 || 690.87 | 691.12 691.63 | 691.88 1692.14 | 692.39 | 692.65 | 692.90 | 693.15
3 693.41 | 693.66 694.17 | 694.42 1694.68 | 694.93 | 695.19 | 695.44 | 695.69
4 695.95 | 696.20 696-71 | 696.96 1697.22 | 697.47 | 697.73 | 697.98 | 698.23
5 698.49 | 698.74 699.25 | 699.50 1699.76 | 700.01 | 700.27 | 700.52 | 700.77
6 701.03 | 701.28 701.79 | 702.04 | 702.30 | 702.55 | 702.81 | 703.06 | 703.31
Ai 703.57 | 703.82 704.33 |'704.58 | 704.84 | 705.09 | 705.35 | 705.60 | 705.85
8 | 706.11 | 706.36 706.87 | 707.12 | 707.38 | 707.63 | 707.89 | 708.14 | 708.39
9 708.65 | 708.90 709.41 |'709.66 | 709.92 | 710.17 | 710.43 | 710.68 | 710.93
Thousandths of an Inch.
4. 3. 6. ie §. 9.
23

13

0.10 0.13 0.15 0.18 | 0.20 |

0

218 COMPARISON OF THE ENGLISH AND METRICAL BAROMETERS.

| Hundredths of an Inch.
English Bae

4 Inches and
0. i. 2. be ad. 6. W 8.

| tenths.

Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim.
0 711.19 | 711.44 | 711.70 | ‘711.95 | 712.20 | 712.46 | '712.71 | 712.97 | '713.22
1 713.73 | 713.98 |'714.24 | 714.49 | 714.74 1715.00 | 715.25 | 715 51 | 715.76
2 716.27 | 716.52 | 716.78 | 717.03 | 717.28 | 717.54 | 717.79 | 715.04 | 718.30
3
4

Millim.
713.47
716.01
718.55
721.09
723.63

| 28.

718.81 | 719.06 | 719.31 | 719.57 | 719.82 | 720.08 | 720.33 | 720.58 | 720.84
721.35 | 721.60 | 721.85 | 722.11 | 722.36 ] 722.62 | 722.87 | 723.12 | 723.38

723.89 | 724.14 | 724.39 | ‘724.65 | 724.90 | 725.16 | 725.41 | 725.66 | 725.92
726.43 | 726.68 | 726.93 | 727.19 | 727.44 [727.70 | 727.95 | 728.20 | 728.46

28.97 | 729.22 | 729.47 | 729.73 | 729.98 | 730.24 | 730.49 | 730.74 | 731.00
731.51 | 731.76 | 732.01 | 732.27 | 732.52 | 732.78 | 733.03 | 733.28 | 733.54
734.05 | 734.30 | 734.55 | 734.81 | 735.06 | 735.32 | 735.57 | 735-82 | 736.08

726.17
728 71
731.25
732.09
736.33

29.0 736.59 | 736.84 | 737.09 | 737.35 | 737.60 | 737.86 | 738.11 | 738.36 | 738.62
1 739.13 | 739.38 | 739.63 | 739.89 | 740.14 | 740.40 | 740.65 | 740.90 | 741.16
2 741.67 | 741.92 | 742.17 | 742.43 | 742.68 |'742.94 | 743.19 | 743.44 | 743.70
5 744.21 | 744.46 | 744.71 | 744.97 | 745.22 | 745.48 | 745.73 | 745.98 | 746.24
£ 746.75 | 747.00 | 747.25 | 747.51 | 747.76 | 748.02 | 748.27 | 748.52 | 748.78

738.87
741.41
743.95
746.49
749.03

=

oS
~

.56 | 750.81 | 751.06 | 751.32 | 751.57
.10 | 753.35 | 753.60 | 753.86 | 754.11

749.29 | 749.54 | 749 79 5
1
-64 |'755.89 | 756.14 | 756.40 | 756.65
1
7

751.83 | 752.08 | 752.33
754.37 | 754.62 | 754.87
756.91 | 757.16 | 757.41
739.45 | 759.70 | 759.95

1

~t

or or
OU
~I
or

©
~
w Om Ww
OD
a +
or or
wo

~
aD or or

~]
or Or
onan ©

18 | 758.43 | 758.68 | 758.94 | 759.19
.72 | 760.97 | 761.22 | 761.48 | 761.73

noe oO oS
sw )
~I +t

or or Or

CmDNIH Hn
~ ©
bo
a.
om

1
>
_
1
7}

761.99 | 762.24 | 762.49 | 76 763.00 | 763.26 | 763.51 | 763.76 | 764.02 | 764.27
764.53 | 764.78 | 765.03 | 765.29 | 765.54 1765.80 | 766.05 | 766.30 | 766.56 | 766.81
767.07 | 767.32 | 767.57 | 767.83 | 768.03 | 768.34 | 768.59 | 768.84 | 769.10 | 769.35
769.61 | 769.86 | 770.11 | 770.37 | 770.62 [770.88 | 771.13 | 771.38 | 771.64 | 771.89
772.15 | 772.40 | 772.65 | 772.91 | 773.16 | 773.42 | 773.67 | 773.92 |'774.18 | 774.43

bo
J
on

we
S
S

m 0 bom

774.69 | 774.94 |'775.19 | 775.45 | 775.70 ]775.96 | 776.21 | 776.46 | 776.72 | 776.97
777.23 | 777.48 | 777.73 | 777.99 | 778.24 | 778.50 | 778.75 | 779.00 | 779.26 | 779.51
779.77 | 780.02 | 780.27 | 780.53 | 780.78 | 781.04 | 781.29 | 781.54 | 781.80 | 782.05
782.31 | 782.56 | 782.81 | 783.07 | 783.32 | 783.58 | 783.83 | 784.08 | 784.34 | 784.59
784.85 | 785.10 | 785.35 | 785.61 | 785.86 | 786.12 | 786.37 | 786.62 | 786.88 | 787.13

omg o

i)
rm
a)

787.59 | 787.64 | 787.89 | 788.15 | 788.40 | 788.66 | 788.91 | 789.16 | 789.42 | 789.67
789.93 | 790.18 | 790.43 | 790.69 | 790.94 791.20 | 791.45 | 791.70 | 791.96 | 792.21
792.47 | 792.72 | 792.97 | 793.23 | 793.48 | 793.74 | 793.99 | 794.24 | 794.50 | 794.75
795.01 | 795.26 | 795.51 | 795.77 | 796.02 | 796.28 | 796.53 | 796.78 | 797.04 | 797.29
797.55 | 797.80 | 798.05 | 798.31 | 798.56 | 798.82 | 799.07 | 799.32 | 799.58 | 799.83

m WwW bo

eee

sex

Il.

COMPARISON

1 English Inch = 11.2595 French or Paris Lines.

OF THE ENGLISH AND OLD FRENCH BAROMETERS.

219

Tenths of an Inch.

SS |

SSS

SS

Inches.

an 0. a | 2, 3. 4. 5. 6. | "7. s. 9.
Par.lines. Pesiteu Pee hnee: Par.lines. | Par.lines. | Par lines. Uaslinces+Pantuce: Fan eeepmeinee,

11 123.85 | 124.98 | 126.11 | 127.23 | 128.36 | 129.48 | 130.61 | 131.74 | 132.86 | 133.99
12 135.11 | 136.24 | 137.37 | 138.49 | 139.62 | 140.74 | 141.87 | 143.00 | 144.12 | 145.25
13 146.37 | 147.50 | 148.63 | 149.75 | 150.88 | 152.00 | 153.13 | 154.26 | 155.38 | 156.51
14 157.63 | 158.76 | 159.88 | 161.01 | 162.14 | 163.26 | 164.39 | 165.51 | 166.64 | 167.77
15 168.89 | 170.02 | 171.14 | 172.27 | 173.40 | 174.52 | 175.65 | 176.77 | 177.90 | 179.03
16 180.15 | 181.28 | 182.40 | 183.53 | 184.66 | 185,78 | 186.91 | 188.03 | 189.16 | 190.29
Hundredths of an Inch. :

2, 3. 4. 5. 6. | 7. 8. 9.

0.225 0.338 0.450 0.563 0.676 | 0.788 | 0.901 1.013

Hundredths of an Inch.

1. ae 3. 4. De 6. ide 8. 9.
Par.lines. | Par. lines. Patines, Par.lines. Par.lines. | Par lines. Par.lines. Babiiines! Par.lines. | Par.lines.

17.0 191.41 | 191.52 | 191.64:| 191.75 | 191.86 | 191.97 | 192.09 | 192.20 | 192.31 | 192.42
1 192.54 | 192.65 | 192.76 | 192.88 | 192.99 | 193.10 | 193.21 | 193.33 | 193.44 | 193.55

2 193.66 | 193.78 | 193.89 | 194.00 | 194.11 | 194.23 | 194.34 | 194.45 | 194.56 | 194.68
3 194.79 | 194.90 | 195.01 | 195.13 | 195.24 | 195.35 | 195.46 | 195.58 | 195.69 | 195.80 |

4 195.92 | 196.03 | 196.14 | 196.25 | 196.37 | 196.48 | 196.59 | 196.70 | 196.82 | 196.93

5 197.04 | 197.15 | 197.27 | 197.38 | 197.49 | 197.60 | 197.72 | 197.83 | 197.94 | 198.05

6 198.17 | 198.28 | 198.39 | 198.50 | 198.62 | 198.73 | 198.84 | 198.96 | 199.07 | 199.18

7 199.29 | 199.41 | 199.52 | 199.63 | 199.74 | 199.86 | 199.97 | 200.08 | 200.19 | 200.31

8 200.42 | 200.53 | 200.64 | 200.76 | 200.87 | 200.98 | 201.09 | 201.21 | 201.32 | 201.43

9 201.55 | 201.66 | 201.77 | 201.88 | 202.00 | 202.11 | 202.22 | 202.33 | 202.45 | 202.56
18.0 202.67 | 202.78 | 202.90 | 203.01 | 203.12 | 203.23 | 203.35 | 203.46 | 203.57 | 203.68
1 203.80 | 203.91 | 204.02 | 204.13 | 204.25 | 204.36 | 204.47 | 204.59 | 204.70 | 204.81

2 204.92 | 205.04 | 205.15 | 205.26 | 205.37 | 205.49 | 205.60 | 205.71 | 205.82 | 205.94

3 206.05 | 206.16 | 206.27 | 206.39 | 206.50 | 206.61 | 206.72 | 206.84 | 206.95 | 207.06

4 207.17 | 207.29 | 207.40 | 207.51 | 207.63 | 207.74 | 207.85 | 207.96 | 208.08 | 208.19

5 208.30 | 208.41 | 208.53 | 208.64 | 208.75 | 208.86 | 208.98 | 209.09 | 209.20 | 209.31

6 209.43 | 209.54 | 209.65 | 209.76 | 209.88 | 209.99 ; 210.10 | 210.21 | 210.33 | 210.44

7 210.55 | 210.67 | 210.78 | 210.89 | 211.00 | 211.12 | 211.23 | 211.34 | 211.45 | 211.57

8 211.68 | 211.79 | 211.90 | 212.02 | 212.13 | 212.24 | 212.35 | 212.47 | 212.58 | 212.69

9 212.80 | 212.92 | 213.03 | 213.14 | 213.25 | 213.37 | 213.48 | 213.59 | 213.71 | 213.82
19.0 213.93 | 214.04 | 214.16 | 214.27 | 214.38 } 214.49 | 214.61 | 214.72 | 214.83 | 214.94
1 215.06 | 215.17 | 215.28 | 215.39 | 215.51 | 215.62 | 215.73 | 215.84 | 215.96 | 216.07

2 216.18 | 216.29 | 216.41 | 216.52 | 216.63 | 216.75 | 216.86 | 216.97 | 217.08 | 217.20
3 217.31 | 217.42 | 217.53 | 217.65 | 217.76 | 217.87 | 217.98 | 218.10 | 218.21 | 218.32

4 218.43 | 218.55 | 218.66 | 218.77 | 218.88 | 219.00 | 219.11 | 219.22 | 219.34 | 219.45

5 219.56 | 219.67 | 219.79 | 219.90 | 220.01 | 220.12 | 220.24 | 220.35 | 220.46 | 220.57
6 220.69 | 220.80 | 220.91 | 221.02 | 221.14 | 221.25 | 221.36 | 221.47 | 221.59 | 221.70
7 221.81 | 221.92 | 222.04 | 222.15 | 222.26 | 222.38 | 222.49 | 222.60 | 222.71 | 222.83

8 222.94 | 223.05 | 223.16 | 223.28 | 223.39 | 223.50 | 223.61 | 223.73 | 223.84 | 223.95

9 224.06 | 224.18 | 224.29 | 224.40 | 224.51 | 224.63 | 224.74 | 221.85 | 224.96 | 225.08

220 COMPARISON OF THE ENGLISH AND OLD FRENCH BAROMETERS.

1 English Inch = 11.2595 French or Paris Lines.

Hundredths of an Inch.

English
Inches ee
fe ae i ee ee A Nie age fae. | 0 Gon | Cee, ees

—p—

20.0 || 225.19 | 225.30 | 225.42 | 225.53 | 225.64 | 225.75 | 225.87 | 225.98 226.09
1 226.32 | 226.43 | 226.54 | 226.65 | 226.77 | 226.88 | 226.99 | 227.10 227.22
2 227.44 | 227.55 ori: 67 | 227.78 | 227.89 { 228.00 | 228.12 | 228.23 | 228.34

3 228.57 | 228.68 | 228.79 | 22

4 229.69 | 229.81 | 229.92 | 23

w

i
8 229.02 | 229.13 229.24 | 229.36 | 229.47
230.03 = 230.37 | 230.48 | 230.59

wwe
bw te
to
bh
b

5 230.82 | 230.93 | 231.04 | 231.16 | 231.27 | 231.38 | 231.50 | 231.61 | 231.72
6 231.95 | 232.06 | 232.17 | 232.28 | 232.40 | 232.51 | 232.62 | 232.73 | 232.85
wf 233.07 | 233.18 | 233.30 | 233.41 | 233.52} 233.63 | 233.75 | 233.86 | 233.97
8 234.20 | 234.31 | 234.42 | 234.54 | 234.65 | 234.76 | 234.87 | 234.99 | 235.10
9 235.32 | 235.44 | 235.55 | 235.66 | 235.77 | 235.89 | 236.00 | 236.11 | 236.22

21.0 236.45 | 236.56 | 236.67 | 236.79 | 236.90 | 237.01 | 237.13 | 237.24 | 237.35
1 237.58 | 237.69 | 237.80 | 237.91 | 238.03 | 238.14 | 238.25 | 238.36 | 238.48
2 238.70 | 238.81 | 238.93 | 239.04 | 239.15 | 239.26 | 239.38 | 239.49 | 239.60
3 239.83 | 239.94 | 240.05 | 240.17 | 240.28 | 240.39 | 240.50 | 240.62 | 240.73
4 240.95 | 241.07 | 241.18 | 241.29 | 241.40 | 241.52 | 241.63 | 241.74 | 241.85

242.08 | 242.19 | 242.30 | 242.42 | 242.53 | 242.64 | 242.75 | 242.87 | 212.98
243.21 | 243.32 | 243.43 | 243.54 | 243.66 | 243.77 | 243.88 | 243.99 | 244.11
244.33 | 244.44 | 244.56 | 244.67 | 244.78 | 244.89 | 245.01 | 245.12 | 245.23
245.46 | 245.57 | 245.68 | 245.79 | 245.91 } 246.02 | 246.13 | 246.25 | 246.36
246.58 | 246.70 | 246.81 | 246.92 | 247.03 | 247.15 | 247.26 | 247.37 | 247.48

Seman aun

22.0 247.71 | 247.82 | 247.93 | 248.05 | 248.16 | 248.27 | 248.38 | 248.50 | 248.61

1 218.83 | 248.95 | 249.06 | 249.17 | 249.29 | 249.40 | 249.51 | 249.62 | 249.74
2 249.96 | 250.07 | 250 19 | 250.30 | 250.41 | 250.52 | 250.64 | 250.75 | 250.86
3 251.09 | 251.20 | 251.31 | 251.42 | 251.54 | 251.65 | 251576 | 251.88 | 251.99
4 252.21 | 252.33 | 252.44 | 252.55 | 252.66 | 252.78 | 252.89 | 253.00 | 253.11

5 253.34 | 253.45 | 253.56 | 253.68 | 253.79 | 253.90 | 254.01 | 254.13 | 254.24
6 254.46 | 254.58 | 254.69 | 254.80 | 254.92 | 255.03 | 255.14 | 255.25 | 255.37
ch 255.59 | 255.70 | 255.82 | 255.93 | 256.04 | 256.15 | 256.27 | 256.38 | 256.49
8 256.72 | 256.83 | 256.94 | 257.05 | 257.17 | 257.28 | 257.39 | 257.50 | 257.62
9 257.84 | 257.96 | 258.07 | 258.18 | 258.29 | 258.41 | 258.52 | 258.63 | 258.74

58.97 | 259.08 | 259.19 | 259.31 | 259.42 | 259.53 | 259.64 | 259.76 | 259.87
260.09 | 260.21 | 260.32 | 260.43 | 260.54 | 260.66 | 260.77 | 260.88 | 261.00
261.22 | 261.33 | 261.45 | 261.56 | 261.67 | 261.78 | 261.90 | 262.01 | 262.12
262.35 | 262.46 | 262.57 | 262.68 | 262.80 | 262.91 | 263.02 | 263.13 | 263.25
263.47 | 263.58 | 263.70 | 263.81 | 263.92 | 264.04 | 261.15 | 264.26 | 264.37

©

9°

oS
bo

1
2
3
4
5 261.60 | 264.71 | 264.82 | 264.94 | 265.05 | 265.16 | 265.27 | 265.39 | 265.50
6 265.72 | 265.84 | 265.95 | 266.06 | 266.17 | 266.29 | 266.40 | 266.51 | 266.62
7 266.85 | 266.96 | 267.08 | 267.19 | 267.30 | 267.41 | 267.53 | 267.64 | 267.75
8 267.98 | 268.09 | 268.20 | 268.31 | 268.43 | 268.54 | 268.65 | 268.76 | 268.88
9 269.10 | 269.21 | 269.33 | 269.44 | 269.55 | 269.67 | 269.78 | 269.89 | 270.00

| Oo. 1. 2. | Be 4. 3. 6. ide 8.

Cc 16

|| Par. lines. | Par.lines, | Par.lines,, Par.lines.| Par.lines. Par.lines, Par.lines.|Par.lines. Par.lines. |

9.

Par. lines.
226.20 |
227.33
228.46
229.58
230.71

231.83
232.96
234.09
235.21
236.34

237.46
238.59
239.71
240.84
241.97

243.09
244.22
245.34
246.47
2417.60

248.72
249.85
250.97
252.10
258.23

tw te nw
> Oo ee
ou

et
oA
6

25
258
256

oS

257.73
258.86

259.98
261.11
262.23
263.36
264.49

265.61
206.74
267.86
268.99

270.12

9.

—

COMPARISON

English |
Inchies and
Tenths.

0.

| Par. lines.
24.0 || 270.23
Zils
272.48
273.61
274.73

_

me WO bo

5 275.86
6 276.98
7 278.11
8 279.24
9 280.36

25.0 281.49

1 282.61
2 283.74
3 284.87
4 285.99

287.12
288.24
289.37
290.50
291.62

eoCnmnnrtana

292.75
293.87
295.00
296.12
297.25

mPwnDe oO

298.38
299.50
300.63
301.75
302.88

eomonrn on

27.0 304.01

1 303.13
306.26
307.38
308.51

309.64
310.76
| 311.89
| 313.01
1314.14

0.

——

1.

| Par. lines,

270.34
271.47
272.59
273.72
274.84

275.97
277.10
278.22
279.35
280.47

281.60
282.73
283.85
284.98
286.10

287.23
288.36
289.48
290.61
291.73

292.86
293.99
295.11
296.24
297.36

298.49
299.62
300.74
301.87
302.99

304.12
305.25
306.37
307.50
308.62

309.75
310.87
312.00
313.13
314.25

OF THE ENGLISH AND ULD FRENCH BAROMETERS.

1 English Inch = 11.2595 French or Paris Lines.

2.

270.45
271.58
272.71
273.83
274.96

276.08
277.21
278.33
279.46
280.59

281.71
282.84
283.96
285.09
286.22

287.34
288.47
289.59
290.72
291.85

292.97
294.10
295.22
296.35
297.48

298.60
299.73
300.85
301.98
303.11

304.23
305.36
306.48
307.61
308.74

309.86
310.99
312.11
313.24
314.37

Par.lines. |

Hundredths of an Inch.

3.

Par lines. |
270.57
271.69
272.82
273.94
275.07

276.20
277.32
278.45
219 .o0
280.70

281.83
282.95
234.08
285.20
286.33

287.46
288.58
289.71
290.83
291.96

293.08

294.21
295.34
296.46
297.59

298.71
299.84
300.97
302.09
303.22

304.34
305.47
306.60
307.72
308.85

309.97
311.10
312.23
313.35
314.48

4.

Par.lines.

270.68 |

271.80
272.93
274.06
275.18

276.31
277.43
278.56
279.69
280.81

281.94
283.06
284.19
285.32
286.44

287.57
288.69
289.82
290.95
292.07

293.20
294.32
295.45
296.58
297.70

298.83
299.95
301.08
302.20
303.33

304.46
305.58
306.71
307.83
308.96

310.09
311.21
312.34
313.46
314.59

221

3.

Par.lines.

270.79
271.92
273.04
274.17
275.29

276.42
277.55
278.67
279.50
280.92

282.05
283.18
284.30
285.43
286.55

287.68
288.81
289.93
291.06
292.18

293.31
294.44
295.56
296.69
297.81

298.94
300.07
301.19
302.32
303.44

304.57
305.70
306.82
307.95
309.07

310.20
311.33
312.45
315.58
314.70

6.

Par. lines.

270.90
272.03
273.16
274.28
275.41

276.53
277.66
278.79
279.91
281.04

282.16
283.29
284.41
285.54
286.67

287.79
288.92
290.04
291.17
292.30

293.42
294.55
295.67
296.80
297.93

299.05
300.18
301.30
302.43
303.56

304.68
305.81
306.93
308.06
309.19

310.31
311.44
312.56
313.69
314.82

7

Par.lines

271.02

272.14 |

273.27
274.39
273.52

276.65
2070.07
278.90
280.02
281.15

282.28
283.40
284.53
285.65
286.78

287.91
289.03
290.16
291.28
292.41

293.54
294.66
295.79
296.91
298.04

299.17
300.29
301.42
302.54
303.67

304.79
305.92
307.05
308.17
309.30

310.42
311.55
312.68
313.80
314.93

8.

Par.lines.
271.13
272.25
273.38
274.51
275.63

276.76
277.88
279.01
280.14
281.26

283.51
254.64
285.77
286.89

288.02
289.14
290.27
291.40
292.52

293.65
294.77
295.90
297.03
298.15

299.28
300.40
301.53
302.66
303.78

304.91
306.03
307.16
308.29
309.41

310.54
311.66
312.79
313.91
315.04

2.

271.24
272.37
273.49
274.62
275.75

276.87
278.00
279.12
280.25
281.38

282.50
283.63
284.75
285.88
287.00

288.13
289.26
290.38
291.51
292.63

293.76
291.89
296.01
297.14
298.26

299.39
300.52
301.64
302.77
303.89

305.02
306.15
307.27
308.40
309.52

310.65
311.78
312.90
314.03
315.15

| Par. lines.

English
Inches and
Tenths.

28.0
1

m Ww bo

—— a"

|

Thousandths of an Inch.

0.

| 0.000

i

COMPARISON OF THE

ENGLISH AND OLD FRENCH BAROMETER».

1 English Inch = 11.2595 French or Paris Lines.

Hundredths of an Inch.

0.

Par.lines
315.27
316.39
317.52
318.64
319.77

320.90
322.02
323.15
324.27
325.40

326.53
327.65
328.78
329.90
331.03

332.16
333.28
334.41
335.53
336.66

337.78
338.91
310.04
341.16
342.29

343.41
344.54
345.67
346.79
347.92

349.04
350.17
351.30
352.42
353.55
354.67
355.80

| a. | 2

0.011

1.

. | Par.lines,
315.38
316.50
317.63
318.76
319.88

321.01
322.13
323.26
324.39
325.51

326.64
327.76
328.89
330.02
331.14

332.27
333.39
334.52
335.65
336.77

337.90
339.02
340.15
341.28
342.40

343.53
344.65
345.78
346.91
348.03

349.16
350.28
351.41
352.53
353.66
354.79
355.91

0.023

2.

Par.lines,
315.49
316.62
317.74
318.87
319.99

321.12
322.25
323.37
324.50
325.62

326.75
327.88
329.00
330.13
331.25

332.38
333.51
334.63
335.76
336.88

338.01
339.14
340.26
341.39
342.51

343.64
344.77
345.89
347.02
348.14

349.27
350.40
351.52
352.65
353.77
354.90
356.03

De

0.034

Be

Par.lines.
315.60
316.73
317.86
318.98
320.11

321.23
322.36
323.49
324.61
325.74

326.86
327.99
329.12
330.24
331.37

332.49
333.62
334.74
335.87
337.00

338.12
339.25
340.37
341.50
342.63

343.75
344.88
3416.00
347.13
348.26

349.38
350.51
351.63
352.76
353.89
355.01
356.14

4.

| 0.045

4.

Par.lines.
315.72
316.84
317.97
319.09
320.22

321.35
322.47
323.60
324.72
325.85

326.98
328.10
329.23
330.35
331.48

332.61
Saas
334.86
335.98
337.11

338.24
339.36
340.49
341.61
342.74

343.87
344.99
346.12
347.24
348.37

349.49
350.62
351.75
352.87
354.00
355.12
356.25

3.

Par.lines,
315.83
516.95
318.08
319.21
320.33

321.46
322.58
323.71
324.84
325.96

327.09
328.21
329.34
330.47
331.59

332.72
333.84
334.97
336.10
337.22

338.35
339.47
340.60
341.73
342.85

343.98
345.10
3416.23
347.36
348.48

349.61
350.73
351.56
352.99
354.11
355.24
356.36

6.

Par.lines.
315.94
317.07
318.19
319.32
320.45

321.57
322.70
323.82
324.95
326.08

327.20
328.33
329.45
330.58
331.70

332.83
333.96
335.08
336.21
337.33

338.46
339.59
540.71
241.84
342.96

344.09
345.22
346.34
BAT.A7
348.59

349.72
350.85
351.97

| 353.10

354.22
755.35

| $56.48

7

Par. lines.

316.05
317.18
318.31
319.43
320.56

321.68
322.81
323.94
325.06
326.19

327.31
328.44
329.57
330.69
331.82

332.94
334.07
335.20
336.32
337.45

338.57
339.70
340.83
341.95
343.08

344.20
345.33
346.45
347.58
348.71

349.83
350.96
352.08
353.21
354.34
355.46
356.59

Par.lines.
316.17
317.29
318.42
319.54
320.67

321.80
322.92
324.05
325.17
326.30

327.43
328.55
329.68
330.80
331.93

333.06
334.18
335.31
336.43
337.56

338.69
339.81
3410.94
342.06
343.19

344.32
345.44
346.57
347.69
348.82

349.95
351.07
352.20
353.32
354.45
355.57
356.70

Par.lines.

| 316.28

317.41
318.53
319.66
320.78

321.91
323.04 |
324.16
325.29
326.41

327.54
328.66
329.79
330.92
352.4

333.17 |
334.29
335.42
336.55
337.67

338.80
339.92
341.05
342.18
343.30

344.43
345.55
346.68
347.81
348.93

350.06
351.18
352.31
353.44
354.56
355.69
356.81

s. ||

18

0.056

6.

=

0.068 0.079

7

0.090

8.

9.

0.101

223

Iil. -IV.

COMPARISON

OF

THE METRICAL BAROMETER

WITH

THE ENGLISH AND THE OLD FRENCH BAROMETERS,
OR

fA BLES

FOR CONVERTING MILLIMETRES INTO ENGLISH INCHES AND DECIMALS,
AND INTO FRENCH OR PARIS LINES ;

GIVING THE VALUES CORRESPONDING TO EVERY MILLIMETRE FROM 250 TO 600;
AND TO EVERY TENTH OF A MILLIMETRE FROM 600 TO 800 MILLIMETRES.

as 2

3 ke c i yo ws LA 9t 2 Ee
rabresi yt 7
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. F 2
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,
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—, ae ow
— .—->

III. COMPARISON OF THE METRICAL AND ENGLISH BAROMETERS. 995
1 Metre = 39.37079 English Inches.
fi |
Millimetres. Units.
Mil‘ime- ‘
tres. a
Tens. 0. 1. 2. De 4, od. 6. dle 8. | 9.

Eng. In. | Eng. In. | Eng. In. | Eng In. | Evz In. | Eng. In. | Eng. In. | Eng. In | Eng. In. | Eng. In.
250 9.843 9.882 9.921 9.961 | 10.000 | 10.040 | 10.079 | 10.118 | 10.158 | 10.197
260 10.236 | 10.276 | 10.315 | 10.355 | 10.394 | 10.433 | 10.478 | 10.512 | 10.551 | 10.591
270 10.630 | 10.669 | 10.709 | 10.748 | 10.788 } 10.827 | 10.866 | 10.906 | 10.945 | 10.984
280 11.024 | 11.063 | 11.103 | 11.142 | 11.181 | 11.221 | 11.260 | 11.299 | 11.339 | 11.378
290 11.418 | 11.457 | 11.496 | 11.536 | 11.575 | 11.614 | 11.654 | 11.693 ; 11.732 | 11.772 |

300 11.811 | 11.851 | 11.890 | 11.929 | 11.969 | 12.008 | 12.047 | 12.087 | 12.126 | 12.166
310 12.205 | 12.244 | 12.284 | 12.323 | 12.362 | 12.402 | 12.441 | 12.481 | 12.520 | 12.589 ||
320 12.599 | 12.638 | 12-677 | 12.717 | 12.756 | 12.795 | 12.835 | 12.874 | 12.914 | 12.953
330 12.992 | 13.032 | 13.071 | 13.110 | 13.150 | 13.189 | 13.229 | 13.268 | 13.307 | 13.547
340 13.386 | 13.425 | 13.465 | 13.504 | 13.544 |] 13.583 | 13.622 | 13.662 | 13.701 | 13.740

350 13.780 | 13.819 | 13.859 | 13.898 | 13.937 | 13.977 | 14.016 | 14.055 | 14.095 | 14.134
360 14.173 | 14.213 | 14.252 | 14.292 | 14.331 | 14.370 | 14.410 | 14.449 | 14.488 | 14.528
4.646 | 14.685 | 14.725 | 14.764 | 14.803 | 14.843 | 14.882 | 14.922

380 14.961 | 15.000 | 15.040 | 15.079 | 15.118 | 15.158 | 15.197 | 15.236 | 15.276 | 15.315
390 15.355 | 15.494 | 15.433 | 15.473 | 15.512 | 15.551 | 15.591 | 15.630 | 15.670 | 15.709

400 15.748 | 15.788 | 15.827 | 15.866 | 15.906 | 15.945 | 15.985 | 16.024 | 16.063 | 16.103
410 16.142 | 16.181 | 16.221 | 16.260 | 16.300 | 16.339 | 16.378 | 16.418 | 16.458 | 16.496
420 16.536 | 16.575 | 16.614 | 16.654 | 16.693 | 16.733 | 16.772 | 16.811 | 16.851 | 16.890
430 16.929 | 16.969 | 17.008 | 17.048 | 17.087 | 17.126 | 17.166 | 17.205 | 17.244 | 17.284
440 17.323 | 17.362 | 17.402 | 17.441 | 17.481 | 17.520 | 17.559 | 17.599 | 17.638 | 17.677

450 17.717 | 17.756 | 17.796 | 17.835 | 17.874 | 17.914 | 17.953 | 17.992 | 18.032 | 18.071
460 18.111 | 18.150 | 18.189 | 18.229 | 18.268 | 18.307 | 18.347 | 18-386 | 18.426 | 18.465
470 18.504 | 18.544 | 18.583 | 18.622 | 18.662 | 18.701 | 18.740 | 18.780 | 18.819 | 18.859
480 18.898 | 18.937 | 18.977 | 19.016 | 19.055 | 19.095 | 19.134 | 19.174 | 19.213 | 19.252
490 19.292 | 19.331 | 19.370 | 19.410 | 19.449 | 19.489 | 19.528 | 19.567 | 19.607 | 19.646

500 19.685 | 19.725 | 19.764 | 19.804 | 19.843 | 19.882 | 19.922 | 19.961 | 20.000 |-20.040
510 20.079 | 20.118 | 20.158 | 20.197 | 20.237 | 20.276 | 20.315 | 20.355 | 20.394 | 20.433
520 20.473 | 20.512 | 20.552 | 20.591 | 20.630 | 20.670 | 20.709 | 20.748 | 20.788 | 20.827
530 20.867 | 20.906 | 20.945 | 20.985 | 21.024 | 21.063 | 21.103 | 21.142 | 21.181 | 21.221
540 21.260 | 21.300 | 21.339 | 21.378 | 21.418 | 21.457 | 21.496 | 21.536 | 21.575 | 21.615

550 21.654 | 21.693 | 21.733 | 21.772 | 21.811 | 21.851 | 21.890 | 21.930 | 21.969 | 22.008
560 22.048 | 22.087 | 22.126 | 22.166 | 22.205 | 22.244 | 22.284 | 22.323 | 22.363 | 22.402 ||
570 22.441 | 22.481 | 22.520 | 22.559 | 22.599 | 22.638 | 22.678 | 22.717 | 22.756 |. 22.796
580 22.835 | 22.874 | 22.914 | 22.953 | 22.993 | 23.032 | 23.071 | 23.111 | 23.150 | 23.189 |
590 23.229 | 23.268 | 23.308 | 23.347 | 23.386 | 23.426 | 23.465 | 23.504 | 23.544 | 23.583

370 14.567 | 14.607 | 1
|

Tenths of Millimetres.

2.7) a. B18 | ae s: | 29.

———— | fc

0.008 | 0.012 | 0.016 | 0.020 | 0.024 | 0.028 | 0.031 | 0.035 |

21

COMPARISON OF THE METRICAL AND ENGLISH BAROMETERS.

1 Metre = 39.87079 English Inches.

Millime-
tres.

600
601
602
603
604

605
606
607

609

a

ADS HD
www wv ww
Ssoeoaoantn on

Ss
35
oO

631
632
633
634

635,
(63.0
| 637
638
639

wmonmwnw nw bw

Tenths of Millimetres.

ssc eal

0. 1. 2. Be 4. 3. 6. Ze 8. 9.

| Eng. In. | Eng. In. | Eng. In. | Eng. in. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In.
23.622 | 23.626 | 23.630 | 23.634 | 23.638 } 23.642 | 23.646 | 23.650 | 23.654 | 23.658
23.662 | 23.666 | 23.670 | 23.674 | 23.678 | 23.682 | 23.685 | 23.689 | 23.693 | 23.697
23.701 | 23.705 | 23.709 | 23.713 | 23.717-] 23.721 | 23.725 | 23.729 | 23.733 | 23.737
23.741 | 23.745 | 23.748 | 23.752 | 23.756 | 23.760 | 23.764 | 23.768 | 23.772 | 23.776
23.780 | 23.784 | 23.788 | 23.792 | 23.796 23.800 | 23.804 | 23.808 | 23.811 | 23.815
23.819 | 23.823 | 23.827 | 23.831 | 23.835 | 23.839 | 23.843 | 23.847 | 23.851 | 23.855
23.859 | 23.863 | 23.867 | 23.871 |.23.874 | 23.878 | 23.882 | 23.886 | 23.890 | 23.894
23.898 | 23.902 | 23.906 | 23.910 | 23.914 | 23.918 | 23.922 | 23.926 | 23.930 | 23.934
23.937 | 23.941 | 23.945 | 23.949 | 23.953 | 23.957 | 23.961 | 23.965 | 23.969 | 23.973
23.977 | 23.981 | 23.985 | 23.989 | 23.993 | 23.996 | 24.000 | 24.004 | 24.008 | 24.012
24.016 | 24.020 | 24.024 | 24.028 | 24.032 24.036 | 24.0140 | 24.044 | 24.048 | 24.052
24.056 | 24.059 | 24.063 | 24.067 | 24.071 | 24.075 | 24.079 | 24.083 | 24.057 | 24.091
24.095 | 24.099 | 24.103 | 24.107 | 24.111 } 24.115 | 24.119 | 24.122 | 24.126 | 24.130
24.134 | 24.138 | 24.142 | 24.146 | 24.150 | 24.154 | 24.158 | 24.162 | 24.166 | 24.170
24.174 | 24.178 | 24.182 | 24.185 | 24.189 | 24.193 | 24.197 | 24.201 | 24.205 | 24.209
24.213 | 24.217 | 24.221 | 24.225 | 24.229 | 24.233 | 24.237 | 24.241 | 24.245 | 24.248
24.252 | 24.256 | 24.260 | 24.264 | 24.268 | 24.272 | 24.276 | 24.280 | 24.284 | 24.288
24.292 | 24.296 | 24.300 | 24.304 | 24.308 | 24.311 | 24.315 | 24.319 | 24.323 | 24.327
24.331 | 24.835 | 24.339 | 24.343 | 24.347 | 24.351 | 24.355 | 24.359 | 24.363 | 24.367
24.371 | 24.374 | 24.378 | 24.3882 | 24.386 | 24.390 | 24.394 | 24.398 | 24.402 | 24.406 |;
24.410.| 24,414 | 24.418 | 24.422 | 24.426 | 24.430 | 24.434 | 24.437 | 24.441 | 24.445
24.449 | 24.453 | 24.457 | 24.461 | 24.465 | 24.469 | 24.473 | 24.477 | 24.481 | 24.485
24.489 | 24.493 | 24.497 | 24.500 | 24.504 | 24.508 | 24.512 | 24.516 | 24.520 | 24.524
24.528 | 24.532 | 24.536 | 24.540 | 24.544 | 24.548 | 24.552 | 24.556 | 24.559 | 24.563
24.567 | 24.571 | 24.575 | 24.579 | 24.583 | 24.587 | 24.591 | 24.595 | 24.599 | 24.603
24.607 | 24.611 | 24.615 | 24.619 | 24.622 | 24.626 | 24.630 | 24.634 | 24.638 | 24.642

| 24.646 | 24.650 | 24.654 | 24.658 | 24.662 | 24.666 | 24.670 | 24.674 | 24.678 | 24.682
24.685 | 24.689 | 24.693 | 24.697 | 24.701 | 24.705 | 24.709 | 24.713 | 24.717 | 24.721
24.725 | 24.729 | 24.733 | 24.737 | 24.741 | 24.745 | 24.748 | 24.752 | 24.756 | 24.760
24.764 | 24.768 | 24.772 | 24.776 | 24.780 | 24.784 | 24.788 | 24.792 | 24.796 | 24.800
24.804 | 24.808 | 24.811 | 24.815 | 24.819 | 24.823 | 24.827 | 24.831 | 24.835 | 24.839
24.843 | 24.847 | 24.851 | 24.855 | 24.859 | 24.863 | 24.867 | 24.871 | 24.874 | 24.878
24.882 | 24.886 | 24.890 | 24.894 | 24.898 | 24.902 | 24.906 | 24.910 | 24.914 | 24.918
24.922 | 24.926 | 24.930 | 24.934 | 24.937 | 24.941 | 24.945 | 24.949 | 24.953 | 24.957
24.961 | 24.965 | 24.969 | 24.973 | 24.977 | 24.981 | 24.985 | 24.989 | 24.993 | 24.997
5.000 | 25.004 | 25.008 | 25.012 | 25.016 | 25.020 | 25.024 | 25.028 | 25.032 | 25.036
5.040 | 25.044 | 25.048 | 25.052 | 25.056 | 25.060 | 25.063 | 25.067 | 25.071 | 25.075
5.079 | 25.083 | 25.087 | 25.091 | 25.095 | 25.099 | 25.103 | 25.107 | 25.111 | 25.115
5.119 | 25.123 | 25.126 | 25.130 | 25.134 | 25.138 | 25.142 | 25.146 | 25.150 | 25.154
5.158 | 25.162 | 25.166 | 25.170 | 25.174 | 25.178 | 25.182 | 25.185 | 25.189 25.193
0. Mak) i2Ser lest aes 5. 6. 7% 8s. | 9

SSS
22

COMPARISON OF THE METRICAL AND ENGLISH BAROMETERS. 997

1 Metre = 39.37079 English Inches

Tenths of Millimetres.

Millime-
tres.

be
=
a
=
78
w

9.

I

Eng. In. | Eng. In. | Eng. In.

|

. | Eng. In.

&
oS
og
4
B
Bi
R
|
6
&
~
0g
ran)
6
&
6
03
lal
B
&
So
oR
H
5

|
|
. | Eng. a

0. i. 2.
640 25.197 | 25.201 | 25.205 | 25.209 | 25.213 j 25.217 | 25.221 | 25.225 | 25.229 | 25.233
641 25.237 | 25.241 | 25.245 | 25.248 | 25.252 | 25 256 | 25.260 | 25.264 | 25.268 | 25.272
642 25.276 | 25.280 | 25.284 | 25.288 | 25.292 | 25.296 | 25.300 | 25.304 | 25.308 | 25.311
643 25.315 | 25.319 | 25.323 | 25.327 | 25.331 | 25.335 | 25.339 | 25.343 | 25.347 | 25.351
644 25.355 | 25.359 | 25.363 | 25.367 | 25.371 | 25.374 | 25.378 | 25.382 | 25.386 | 25.390
.394 | 25.398 | 25.402 | 25.406 | 25.410 | 25.414 | 25.4 25.422 | 25.426 | 25.430
-A34 | 25.437 | 25.441 | 25.445 | 25.449 | 25.453 | 25.457 | 25.461 | 25.465 | 25.469
-473 | 25.477 | 25.481 | 25.485 | 25.489 | 25 4193 | 25.497 | 25.500 | 25.504 | 25.508
512 | 25.516 | 25.520 | 25.524 | 25.528 | 25.532 | 25.536 | 25.540 | 25.544 | 25.548
.552'| 25.556 | 25.560 | 25.563 | 25.567 | 25.571 | 25.575 | 25.579 | 25.583 | 25.587
650 25.591 | 25.595 | 25.599 | 25.603 | 25.607 | 25.611 | 25.615 | 25.619 | 25.623 | 25.626
651 25.630 | 25.634 | 25.638 | 25.642 | 25.646 | 25.650 | 25.654 | 25.658 | 25.662 | 25.666
652 25.670 | 25.674 | 25.678 | 25.682 | 25.686 | 25.689 | 25.693 | 25.697 | 25.701 | 25.705
653 25.709 | 25.713 | 25.717 | 25.721 | 25.725 | 25.729 | 25.733 | 25.737 | 25.741 | 25.745
654 25.748 | 25.752 | 25.756 | 25.760 | 25.764 | 25.768 | 25.772 | 25.776 | 25.780 | 25.784
655 25.788 | 25.792 | 25.796 | 25.800 | 25.804 | 25.808 | 25.811 | 25.815 | 25.819 | 25.823
656 25.827 | 25.831 | 25.835 | 25.839 | 25.843 | 25.847 | 25.851 | 25.855 | 25.859 | 25.863
657 25.867 | 25.871 | 25.874 | 25.878 | 25.882 | 25.886 | 25.890 | 25.894 | 25.898 | 25.902
658 25.906 | 25.910 | 25.914 | 25.918 | 25.922 | 25.926 | 25.930 | 25.934 | 25.937 | 25.941
659 25.945 | 25.949 | 25.953 | 25.957 | 25.961 25.973 |.25.977 | 25.981

25.965 | 25.969

660 25.985 | 25.989 | 25.993 | 25.997 | 26.000 | 26.004 | 26.008 | 26.012 | 26.016 | 26.020
661 26.024 | 26.028 | 26.032 | 26.036 | 26.040 } 26.044 | 26.048 | 26.052 | 26.056 | 26.060
662 26.063 | 26.067 | 26.071 | 26.075 | 26.079 | 26.083 | 26.087 | 26.091 | 26.095 | 26.099
665 26.103 | 26.107 | 26.111 | 26.115 | 26.119 | 26.123 | 26.126 | 26.130 | 26.134 | 26.138
664 26.142 | 26.146 | 26.150 | 26.154 | 26.158 | 26.162 | 26.166 | 26.170 | 26.174 | 26.178

665 26.182 | 26.186 | 26.189 | 26.193 | 26.197 | 26.201 | 26.205 | 26.209 | 26.213 | 26.217
666 26 221 | 26.225 | 26.229 | 26.233 | 26.237 | 26.241 | 26.245 | 26.249 | 26.252 | 26.256
667 26.260 | 26.264 | 26.268 | 26.272 | 26.276 | 26:280 | 26.284 | 26.288 | 26.292 | 26.296
668 26.300 | 26.304 | 26.308 | 26.311 | 26.315 | 26.319 | 26.323 | 26.327 | 26.331 | 26.335
669 26.339 | 26.343 | 26.347 | 26.351 | 26.355 | 26.359 | 26.363 | 26.367 | 26.371 | 26.374

670 26.378 | 26.382 | 26.386 | 26.390 | 26.394 | 26.398 | 26.402 | 26.406 | 26.410 | 26.414
671 26.418 | 26.422 | 26.426 | 26.430 | 26.434 | 26.437 | 26.441 | 26.445 | 26.449 | 26.453
672 26.457 | 26.461 | 26.465 | 26.469 | 26.473 | 26.477 | 26.481 | 26.485 | 26.489 | 26.493

673 26.497 | 26.500 | 26.504 | 26.508 | 26.512 | 26.516 | 26.520 | 26.524 | 26.528 | 26.532
674 26.536 | 26.540 | 26.544 | 26.548 | 26.552 | 26.556 | 26.560 | 26.563 | 26.567 | 26.571

675 26.575 | 26.579 | 26.583 | 26.587 | 26.591 | 26.595 | 26.599 | 26.603 | 26.607 | 26.611
676 26.615 | 26.619 | 26.623 | 26.626 | 26.630 | 26.634 | 26.638 | 26.642 | 26.646 | 26.650
677 26.654 | 26.658 | 26.662 | 26.666 | 26.670 | 26.674 | 26.678 | 26.682 | 26.686 | 26.689
678 26.693 | 26.697 | 26.701 | 26.705 | 26.709 | 26.713 | 26.717 | 26.721 | 26.725 | 26.729
679 26.733 | 26.737 | 26.741 | 26.745 | 26.749 | 26.752 | 26.756 | 26.760 | 26.764 | 26.768

0. I. 2. 3. 4. 3. 6. Ze 8. 9.

—
nDAnAnDnDH
Hee
CcOntD oO
bow hw hw be
Sr Or Sr Or Or

Millime-
tres.

680
681
682
683
684

685
686
687
688
689

690
691
692
693
694

695
696
697
698
699

700
701
702
703
704

705
706
707
708
709

710
711
712
713
714

715
716
717
718
719

COMPARISON

0.

Eng. In.
26.772
26.812
26.851
26.890
26.930

26.969
27.008
27.048
27.087
27.126

27.166
27.205
27.245
27.284
27.323

27.363
27.402
27.441
27.481
27.520

27.560
27.599
27.638
27.678
27.717

ww nw wo
~t

2

27.953
27.993
28.032
28.071
28.111

28.150
28.189
28.229
28.268
28.308

0.

1.

Eng. In.
26.776
26.815
26.855
26.894
26.934

26.973
27.012
27.052
27.091
27.130

27.170
27.209
27.249
27.288
27.327

27.367
27.406
27.445
27.485
27.524

27.563
27.603
27.642
27.682
27.721

27.760
27.800
27.839
27.878
27.918

27.957
27.997
28.036
28.075
28.115

28.154
28.193
28.233
28.272
28.312

i.

OF THE

1 Metre = 39.37079 English Inches.

2.

Eng. In.
26.780
26.819
26.859
26.898
26.937

26.977
27.016
27.056
27.095
27.134

27.174
27.213
27.252
27.292
27.331

27.371
27.410
27.449
27.489
27.528

27.567
27.607
27.646
27.686
27.725

27.764
27.804
27.843
27.882
27.922

27.961
28.001
28.040
28.079
28.119

28.158
28.197
28.237
28.276
28.315

2.

Be

| Eng. In.
26.784
26.823
26.863
26.902
26.941

26.981
27.020
27.060
27.099
27.138

27.178
27.217
27.256
27.296

27.335

27.375
27.414
27.453
27.493
27.532

27.571
27.611
27.650
27.689
27.729

27.768
27.808
27.847
27.886
27.926

27.965
28.004
28.044
28.083
28.123

28.162
28.201
28.241
28.280
28.319

3.

Tenths of Millimetres.

4.

Eng. In. |

26.788
26.827

26.945

26.985

27.103

27.260

27.339

27.378
27.418
27.457
27.497

27.575
27.615
27.654
27.693

27.772
27.812
27.851
27.890
27.930

27.969
28.008
28.048
28.087
28.126

28.166 |

28.205
28.245
28.284
28.323

4.

24

27.024 |
27.063 |

27.142 |

27.182 |
27.221 |

27.300 |

27.733 |

de

Eng. In.
26.792

) 26.831
26.867 |
26.906 |
| 26.949

26.871
26.910

26.989
27.028
27.067
27.107
27.146

27.186
27.225
27.264
27.304
27.343

| 27.382
| 27.422

27.461

| 27.500
27.536 |

27.540

| 27.579

27.619

| 27.658

27.697
27.737

27.776
27.815
27.855
27.894
27.934

27.973

| 28.012
| 28.052

28.091

28.130

28.170
28.209
28.249
28.288
28.327

5.

6.

Eng. In.
26.796
26.835
26.875
26.914
26.953

26.993
27.032
27.071
27.111
27.150

27.189
27.229
27.268

27.308 |

27.347

27.386
27.426
27-465
27.504
27.544

27.583
27.623
27.662
27.701
27.741

27.780
27.819
27.859
27.898
27.938

27.977
28.016

28.056

28.095

28.134 |

28.174
28.213
28.252
28.292
28.331

6.

Ge

Eng. In.
26.800
26.839
26.878
26.918
26.957

26.997
27.036
27.075
27.115
27.154

27.193
27.233
27.272
27.312
27.351

27.390
27.430
27.469
27.508
27.548

27.587
27.626
27.666
27.705
27.745

27.784
27.823
27.863
27.902
27.941

27.981
28.020
28.060
| 28.099
28.138

28.178
28.217
28.256
28.296
| 28.335

Ze

METRICAL AND ENGLISH BAROMETERS.

8.

Eng. In.

| 26.804

26.843
26.882
26.922
26.961

27.000
27.040
27.079
27.119
27.158

27.197
27.237
27.276
27.315
27.355

27.394
27.434
27.473
27.512
27.552

27.591
27.630
27.670
27.709
27.749

27.788
27.827
27.867
27.906
27.945

27.985
28.024
28.063
28.103
28.142

28.182
28.221
28.260
28.300
28.339

8.

Eng. In.
26.808

26.847 |

26.886
26.926
26.965

27.004
27.044
27.083
27.123
27.162

27.201
27.241
27.280
27.319
27.359

27.398
27.438
27.477
27.516
27.556

27.595
27.634
27.674
27.713
27.752

27.792
27.831
27.871
27.910
27.949

27.989
28.028
28.067
28.107
28.146

28.186
28.225
28.264
28.304
28.343

COMPARISON OF THE METRICAL AND ENGLISH BAROMETERS, 999

1 Metre = 39.37079 English Inches.

Tenths of Millimetres.

0. 1. 2. 3. 4. 3. 6. 7 8.

_ || Eng. In. Eng. In. | Eng. In. | Eng. In. | Eng In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. =|
720 28.347 | 28.351 | 28.355 | 28.359 | 28.363 | 28.367 | 28.371 | 28.375 | 28.378 | 28.382 ||
1
721 28.386 | 28.390 | 28.394 | 28.398 | 28.402 | 28.406 | 28.410 | 28.414 | 28.418 | 28. ral
|
!

722 28.426 | 28.430 | 28.434 | 28.438 | 28.441 | 28.445 | 28.449 | 28.453 | 28.457 | 28.461
723 28.465 | 28.469 | 28.473 | 28.477 | 28.481 | 28.485 | 28.489 | 28.193 | 28.497 | 28.501
724 28.504 | 28.508 | 28.512 | 28.516 | 28.520 | 28.524 | 28.528 | 28.532 | 28.536 | 28.540

725 28.544 | 28.548 | 28.552 | 28.556 | 28.560 | 28.564 | 28.567 | 28.571 | 28.575 | 28.579

726 28.583 | 28.587 | 28.591 | 28.595 | 28.599 | 28.603 | 28.607 | 28.611 | 28.615 | 28.619 |,
727 28.623 | 28.627 | 28.630 | 28.634 | 28.638 | 28.642 | 28.646 | 28.650 | 28.654 | 28.658
728 28.662 | 28.666 | 28.670 | 28.674 | 28.678 | 28.682 | 28.686 | 28.689 | 28.693 | 28.697 |:
729 28.701 | 28.705 | 28.709 | 28.713 | 28.717 | 28.721 | 28.725 | 28.729 | 28.733 | 28.737 |

730 28.741 | 28.745 | 28.749 | 28.752 | 28.756 | 28.760 | 28.764 | 28.768 | 28.772 | 28.776
731 28.780 | 28.784 | 28.788 | 28.792 | 28.796 | 28.800 | 28.804 | 28.808 | 28.812 | 28.815
732 28.819 | 28.823 | 28.827 | 28.831 | 28.835 | 28.839 | 28.843 | 28.847 | 28.851 | 28.855
733 28.859 | 28.863 | 28.867 | 28.871 | 28.875 | 28.878 | 28.882 | 28.886 | 28.890 | 28.894
734 28.898 | 28.902 | 28.906 | 28.910 | 28.914 | 28.918 | 28.922 | 28.926 | 28.930 | 28.934

|

|
735 28.938 | 28.941 | 28.945 | 28.949 | 28.953 | 28.957 | 28.961 | 28.965 | 28.969 | 28.973
736 28.977 | 28.981 | 28.985 | 28.989 | 28.993 | 28.997 | 29.001 | 29.004 | 29.008.| 29.012 |.
wee 29.016 | 29.020 | 29.024 | 29.028 |! 29.032 | 29.036 ! 29.040 | 29.044 | 29.048 | 29.052
738 29.056 | 29.060 | 29.064 | 29.067 | 29.071 | 29.075 | 29.079 | 29.083 | 29.087 | 29.091

739 29.095 | 29.099 | 29.103 | 29.107 | 29.111 | 29.115 | 29.119 | 29.123 | 29.127 | 29.130

740 29.134 | 29.138 | 29.142 | 29.146 | 29.150 } 29.154 | 29.158 | 29.162 | 29.166 | 29.170
741 29.174 | 29.178 | 29.182 | 29.186 | 29.190 | 29.193 | 29.197 | 29.201 | 29.205 | 29.209

742 29.213 | 29.217 | 29.221 | 29.225 | 29.229 | 29.233 | 29.237 | 29.241 | 29.245 | 29.249

7438 29.252 | 29.256 | 29.260 | 29.264 | 29.268 | 29.272 | 29.276 | 29.280 | 29.284 | 29.288
744 29.292 | 29.296 | 29.300 | 29.304 | 29.308 | 29.312 | 29.315 | 29.319 | 29.323 | 29.327

745 29.331 | 29.335 | 29.339 | 29.343 | 29.347 | 29.351 | 29.355 | 29.359 | 29.363 | 29.367
746 29.371 | 29.375 | 29.378 | 29.382 | 29.386 | 29.390 | 29.394 | 29.398 | 29.402 | 29.406
TAT 29.410 | 29.414 | 29.418 | 29.422 | 29.426 | 29.430 | 29.434 | 29.438 | 29.441 | 29:445
748 29.449 | 29.453 | 29.457 | 29.461 | 29.465 | 29.469 | 29.4173 | 29.4177 | 29.481 | 29.485
719 29.489 | 29.493 | 29.497 | 29.501 | 29.504 | 29.508 | 29.512 | 29.516 | 29.520 | 29.524

751 29.567 | 29.571 | 29.575 | 29.579 | 29.583 | 29.587 | 29.591 | 29.595-| 29.599 | 29.603
752 29.607 | 29.611 | 29.615 | 29.619 | 29.623 | 29.627 | 29.630 | 29.634 | 29.638 | 29.642
753 29.646 | 29.650 | 29.654 | 29.658 | 29.662 | 29.666 | 29.670 | 29.674 | 29.678 | 29.632
T54 29.686 | 29.690 | 29.693 | 29.697 | 29.701 | 29.705 | 29.709 | 29.713 | 29.717 | 29.721

755 29.725 | 29.729 | 29.733 | 29.737 | 29.741 | 29.745 | 29.749 | 29.753 | 29.756 | 29.760
756 29.764 | 29.768 | 29.772 | 29.776 | 29.780 | 29.784 | 29.788 | 29.792 | 29.796 | 29.800
757 29.804 | 29.808 | 29.812 | 29.815 | 29.819 4 29.823 | 29.827 | 29.831 | 29.835 | 29.839
758 29.843 | 29.847 | 29.851 | 29.855 | 29.859 | 29.863 | 29.867 | 29.871 29.875 29.878

759 29.882 | 29.886 | 29.890 | 29.894 | 29.898 | 29.902 | 29.906 | 29.910 | 29.914 | 29.918
|

|
|
|
750 29.528 | 29.532 | 29.536 | 29.540 | 29.544 | 29.548 | 29.552 | 29.556 | 29.560 | 29. |
|
_l|

deeb esta eee ieee eee ey, | 8, | 9.

Cc 25

COMPARISON OF THE METRICAL AND ENGLISH BAROMETERS.

1 Metre = 39.37079 English Inches.

| Millime-
tres.
| 0. 1. De che 4. De 6. die 8.
=o Eng. In. | Eng. a Eng. Tah Eng Th Eng. In. } Eng. In. | Eng. In. | Eng. In | Eng. In.
760 29.922 | 29.926 | 29.930 | 29.934 | 29.938 | 29.941 | 29.945 | 29.949 | 29.953
761 29.961 | 29.965 | 29.969 | 29.973 | 29.977 | 29.981 | 29.985 | 29.989 | 29.993
762 30.00] | 30.004 | 30.008 | 30.012 | 30.016 | 30.020 | 30.024 | 30.028 | 30.032
763 30.040 | 30.044 | 30.048 | 30.052 30.056 30.060 | 30.064 | 30.067 | 30.071
| 64 30.079 | 30.083 | 30.087 | 30.091 | 30.095 | 30.099 | 30.103 | 30.107 | 30.111
765 30.119 | 30.123 | 30.127 | 30.130 | 30.134 | 30.138 | 30.142 | 30.146 | 30.150
766 30.158 | 20.162 | 30.166 | 30.170 | 30.174 | 30.178 | 30.182 | 30.186 | 30.190
767 30.197 | 30.201 | 30.205 | 30.209 | 30.213 | 30.217 | 30.221 | 30.225 | 30.229
768 30.237 | 30.241 | 30.245 | 30.249 | 30.253 30.256 30.260 | 30.264 | 30.268
769 30.276 | 30.280 | 30.284 | 30.288 | 30.292 | 30.296 | 30.300 | 30.304 | 30.308
770 30.316 | 30.319 | 30.323 | 30.327 | 30.331 | 30.335 | 30.339 | 30.343 | 30.347
771 30.355 | 30.359 | 30.363 | 30.367 | 30.371 | 30.375 | 30.379 | 30.382 | 30.386
772 30.394 | 30.398 | 30.402 | 30.406 | 30.410 | 30.414 | 30.418°| 30.422 | 30.426
773 30.434 | 30.438 | 30.441 | 30.445 | 30.449 | 30.453 | 30.457 | 30.461 | 30.465
774 30.473 | 30.477 | 30.481 | 30.485 | 30.489 | 30.493 | 30.497 | 30.501 | 30.504
775 30.512 | 30.516 | 30.520 | 30.524 | 30.528 | 30.532 | 30.536 | 30.540 | 30.544
776 30.552 | 30.556 | 30.560 | 30.564 | 30.567 | 30.571 | 30.575 | 30.579 | 30.583
777 30.591 | 30.595 | 30.599 | 30.603 | 30.607 | 30.611 | 30.615 | 30.619 | 30.623
| 778 30.630 | 30.634 | 30.638 | 30.642 | 30.646 30.650 » 30.654 | 30.658 | 30.662
779 30.670 | 30.674 | 30.678 | 30.682 | 30.686 | 30.690 | 30.693 | 30.697 | 30.701
780 30.709 | 30.713 | 30.717 | 30.721 | 30.725 | 30.729 | 30.733 | 30.737 | 30.741.
781 30.749 | 30.753 | 30.756 | 30.760 | 30.764 | 30.768 | 30.772 | 30.776 | 30.780
782 30.788 | 30.792 | 30.796 | 30.800 | 30.804 | 30.808 | 30.812 | 30.816 | 30.819
783 30.827 | 30.831 | 30.835 | 30.839 | 30.843 | 30.847 | 30.851 | 30.855 | 30.859
784 30.867 | 30.871 | 30.875 | 30.879 | 30.882 | 30.886 | 30.890 | 30.894 | 30.898
30.906 | 30.910 | 30.914 | 30.918 | 30.922 | 30.926 | 30.930 | 30.934 | 30.938
30.945 | 30.949 | 30.953 | 30.957 | 30.961 | 30.965 | 30.969 | 30.973 | 30.977
5 30.985 | 30.989 | 30.993 | 30.997 | 31.001 | 31.004 | 31.008 | 31.012 | 31.016
i 31.024 | 31.028 | 31.032 | 31.036 | 31.040 | 31.044 | 31.048 | 31.052 | 31.056
31.064 | 31.067 | 31.071 | 31.075 | 31.079 | 31.083 | 31.087 | 31.091 | 31.095
31.103 | 31.107 | 31.111 | 31.115 | 31.119 | 31.123 | 31.127 | 31.130 | 31.134
31.142 | 31.146 | 31.150 | 31.154 | 31.158 | 31.162 | 31.166 | 31.170 | 31.174
2 31.182 | 31.186 | 31.190 | 31.193 | 31.197 | 31.201 | 31.205 | 31.209 | 31.213
31.221 | 31.225. | 315229") 31-233) | 312387 tes 24ie|)3Sl 245) | Sle24 9 ees
31.260 | 31.264 | 31.268 | 31.272 | 31.276 | 31.280 | 31.284 | 31.288 | 31.292
31.300 | 31.304 | 31.308 | 31.312 | 31.316 | 31.319 | 31.323 | 31.327 | 31.331
.31.339 | 31.343 | 31.347 | 31.351 | 31.355 | 31.359 | 31.363 | 31.367 | 31.371
31.379 | 31.382 | 31.386 | 31.390 | 31.394 | 31.398 | 31.402 | 31.406 | 31.410
31.418 | 31.422 | 31.426 | 31.430 | 31.434 ] 31.438 | 31.442 | 31.445 | 31.449
31.457 | 31.461 | 31.465 | 31.469 | 31.473 | 31.477 | 31.481 | 31.485 | 31.489
31.497 | 31.501 | 31.505 | 31.508 | 31.512 | 31.516 | 31.520 | 31.524 | 31.528
| Hundredths of Millimetres.
| 0. 1. oF 3. 4. De 6. | a | &.
—= ee paeaeees Site EN as! aha
;| -0000 -0004 -0008 -0012 -0016 -0020 | -0024 | -0028 | -0031
<a s
C 26

Tenths of Millimetres.

9.

Eng. In.
29.957
29,997
30.036
30.075
30.115

30.154
30.193
30.233
30.272
30.312

30.351
30.390
30.430
30.469
30.508

30.548
30.587
30.627
30.666
30.705

30.745
30.784
30.823
30.863
30.902

30.942
30.981
31.020
31.060
31.099

31.138
31.178
31217
31.256
31.296

31.535
31.375
51.414
31.455
31.493
31.532

Q
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. ou.
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.
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he ok
908 5 €
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9.

0035 _|

1V. COMPARISON OF THE METRICAL AND OLD FRENCH BAROMETERS. 231

1 Millimetre = 0.448296 French or Paris Line.

Millimetres. Units.
Millimetres

Tens.
0. 1. 2. de 4. de 6. 7% 8. 9.

Par.lines.| Par.lines Par.lines. | Par.lines.| Par.lines. | Par.lines. | Par.lines.| Par.lines.| Par.lines. | Par.lines,
300 132.99 | 133.43 | 133.88 | 134.32 | 134.76 | 135.21 | 135.65 | 136.09 | 186.54 | 136.98
310 137.42 | 137.87 | 138.31 | 138.75 | 139.19 | 139.64 | 140.08 | 140.52 | 140.97 | 141.41
320 141.85 | 142.30 | 142.74 | 143.18 | 143.63 | 144.07 | 144.51 | 144.96 | 145.40 | 145.84
330. 146.29 | 146.73 | 147.17 | 147.62 | 148.06 | 148.50 | 148.95 | 149.39 | 149.83 | 150.28
340 150.'72 | 151.16 | 151.61 | 152.05 | 152.49 | 152.94 | 153.38 | 153.82 | 154.27 | 154.71
350 155.15 | 155.60 | 156.04 | 156.48 | 156.93 | 157.387 | 157.81 | 158.26 | 158.70 | 159.14
360 159.59 | 160.03 | 160.47 | 160.92 | 161.36 | 161.80 | 162.25 | 162.69 | 163.13 | 163.58
370 164.02 | 164.46 | 164.91 | 165.35 | 165.79 | 166.24 | 166.68 | 167.12 | 167.57 | 168.01
380 168.45 | 168.90) 169.34 | 169.78 | 170.23 1 170.67 | 171.11 | 171.56 | 172.00 | 172.44
390 172.89 | 173.33! 173.77 | 174.22 | 174.66 | 175.10 | 175.55 | 175.99 | 176.43 | 176.88

400 177.32 | 177.76 | 178.20 | 178.65 | 179.09 | 179.53 | 179.98 | 180.42 | 180.86 | 181.51

410 181.75 | 182.19 | 182.64 | 183.08 | 183.52 | 183.97 | 184.41 | 184.85 | 185.30 | 185.74
420 186.18 | 186.63 | 187.07 | 187.51 | 187.96 | 188.40 | 188.84 | 189.29 | 189.73 | 190.17
430 190.62 | 191.06 | 191.50 | 191.95 | 192.59 192.83 | 193.28 | 193.72 | 194.16 | 194.61
440 195.05 | 195.49 | 195.94 | 196.38 | 196.82 | 197.27 | 197.71 | 198.15 | 198.60 | 199.04

450 199.48 | 199.93 | 200.37 | 200.81 | 201.26 | 201.70 | 202.14 | 202.59 | 203.03 | 203.47
460 || 203.92 | 204.36 | 204.80 | 205.25 | 205.69 | 206.13 | 206.58 | 207.02 | 207.46 | 207.91
470 208.35 | 208.79 | 209.24 | 209.68 | 210.12 | 210.57 | 211.01 | 211.45 | 211.90 | 212.34
480 212.78 | 213.23 | 213.67 | 214.11 | 214.56 | 215.00 | 215.44 | 215.88 | 216.33 | 216.77 ||
490 217.22 | 217.66 | 218.10 | 218.54 | 218.99 } 219.43 | 219.87 | 220.32 | 220.76 | 221.20

500 221.65 | 222.09 | 222.53 | 222.98 | 223.42 | 223.86 | 224.31 | 224.75 | 225.19 | 225.64
510 226.08 | 226.52 | 226.97 | 227.41 | 227.85 | 228.30 | 228.74 | 229.18 | 229.63 | 230.07
520 230.51 | 230.96 | 231.40 | 231.84 | 232.29 } 232.73 | 233.17 | 233.62 | 234.06 | 234.50
530 234.95 | 235.39 | 235.83 | 236.28 | 236.72 | 237.16 | 237.61 | 238.05 | 238.49 | 238.94
540 239.38 | 239.82 | 240.27 | 240.71 | 241.15 | 241.60 | 242.04 | 242.48 | 242.93 | 2143.37

550 243.81 | 244.26 | 244.70 | 245.14 | 245.59 | 246.03 | 246.47 | 246.92 | 247.36 | 247.80 |
560 248.25 | 248.69 | 249.13 | 249.57 | 250.01 | 250.46 | 250.91 | 251.35 | 251.79 | 252.24
570 252.68 | 253.12 | 253.57 | 254.01 | 254.45 | 254.90 | 255.34 | 255.78 | 256.23 | 256.67
580 257.11 | 257.55 | 258.00 | 258.44 | 258.88 | 259.32 | 259.77 | 260.21 | 260.66 | 261.10
590 261.54 | 261.99 | 262.43 | 262.87 | 263.32 | 263.76 | 264.20 | 264.65 | 265.09 | 265.53 |

Tenths

of Millimetres.

0. 1. 2. | Be 4. de 6. Zo | 8. 9.
0.000 Braid “09 | 0.19 aeahie ies Loman ised | 0.5 pee
Hundredths of Millimetres. |
0.000 | 0.004 0.009 | 0.013 0.018 | 0.022 0.027 | 0.031 0.035 | 0.040 |

932 CONPARISGO.¥ OF THE METRICAL AND OLD FRENCH BAROMETERS,
1 Millimetre = 0.443296 French Line.
Tenths of Millimetres. i
Millime- z |
tres.
©. ||, Be ameeai ces ae Se) | Ge) | es Ae SL Oe
Par.lines. Par.lines. Par.lines. Par.lines. Par.lines. } Par.lines. Par.lines. Par.lines. Par.lines. Pavlinen
| 600 265.98 | 266.02 | 266.07 | 266.11 | 266.15 266.20 | 266.24 | 266.29 | 266.33 | 266.38
601 266.42 | 266.47 | 266.51 | 266.55 | 266.60 | 266.64 | 266.69 | 266.73 | 266.78 | 266.82
602 || 266.86 | 266.91 | 266.95 | 267.00 | 267.04 | 267.09 | 267.13 | 267.17 | 267.22 | 267.26
|| 603 || 267.31 | 267.35 | 267.40 | 267.44 | 267.48 | 267.53 | 267.57 | 267.62 | 267.66 | 267.71 |
604 267.75 | 267.80 | 267.84 | 267.88 | 267.93 | 267.97 | 268.02 | 268.06 | 268.11 | 268.15 |
605 268.19 | 268.24 | 268.28 | 268.33 | 268.37 | 268.42 | 268.46 | 268.50 | 268.55 | 268.59
606 268.64 | 268.68 | 268.73 | 268.77 | 268.81 | 268.86 | 268.90 | 268.95 | 268.99 | 269.04
607 269.08 | 269.13 |.269.17 | 269.21 | 269.26 | 269.30 | 269.35 | 269.39 | 269.44 | 269.48
608 269.52 | 269.57 | 269.61 | 269.66 | 269.70 | 269.75 | 269.79 | 269.83 | 269.88 | 269.92
609 269.97 | 270.01 | 270.06 | 270.10 | 270.14 | 270.19 | 270.23 | 270.28 | 270.32 | 270.37
610 270.41 | 270.45 | 270.50 | 270.54 | 270.59 | 270.63 | 270.68 | 270.72 | 270.77 | 270.81
611i 270.85 | 270.90 | 270.94 | 270.99 | 271.03 | 271.08 | 271.12 | 271.16 | 271.21 | 271.25
612 271.30) 271.34 0271239) | 271543 271.47 272) 27a 56 271-6 271 G5al2alewO
N 613 271.74) 27078) 271-83") 271.87 | 271.92 271-96) 272.01) 272-05) | 27210 e272 elt
614 272.18 | 272.23 | 272.27 | 272.32 | 272.36 | 272.41 | 272.45 | 272.49 | 272.54 | 272.58
615 272.63 | 272.67 | 272.72 | 272.76 | 272.80 | 272.85 | 272.89 | 272.94 | 272.98 | 273.03 |
616 273.07 | 273-10) |.273.16 | 273.20) 273.25 1 273329 275.04 | 27Sca0 | ode to etka
617 273.51 | 273.56 | 273.60 | 273.65 | 273.69 | 273.74 | 273.78 | 273.82 | 273.87 | 273.91
618 273.96 | 274.00 | 274.05 | 274.09 | 274.13 | 274.18 | 274.22 | 274.27 | 274.31 | 274.36 ||
619 274540) 274.445] 274.49 | 274.53 | 274.58 1 274.62'| 274.67 | 2747 | 274.75 | 2780 !
620 274.84 | 274.89 | 274.98 | 274.98 | 275.02 | 275.07 | 275.11 | 275.15 | 275.20 | 275.24
62 275.29 | 275.83. | 275.38 | 275.42 | 275.46 | 275.51 | 275.55 | 275.60 | 275.64 | 275.69
622 275.73 | 275.77 | 275.82 | 275.86 | 275.91 | 275.95 | 276.00 | 276.04 | 276.08 | 276.13
623 276.17 | 276.22 | 276.26 | 276.31 | 276.35 | 276.38 | 276.44 | 276.48 | 276.53 | 276.57
624 276.62 | 276.66 | 276.71 | 276.75 | 276.79 | 276.84 | 276.88 | 276.93 | 276.97 | 277.02
625 277206) 277.10 QTL.) Lee lO 202k Wek ee O | aleoe | 277.37 | 277.41 | 277.46
626 277.50 | 277.55 | 277.59 | 277.64 | 277.58 | 277.72 | 277.77 | 277.81 | 277.86 | 277.90 |!
627 277.95 | 277.99 | 278.04 | 278.08 | 278.12 | 278.17 | 278.21 | 278.26 | 278.30 | 278.35
628 278.39 | 278.43 | 278.48 | 278.52 | 278.57 | 278.61 | 278.66 | 278.70 | 278.74 | 278.79 || °
629 278.83 | 278.88 | 278.92 | 278.97 | 279.01 | 279.05 | 279.10 | 279.14 | 279.19 | 279.23
} 630 279.28 | 279.32 | 279.37 | 279.41 | 279.45 | 279.50 | 279.54 | 279.59 | 279.63 | 279.68
| 631 279.72 | 279.76 | 279.81 | 279.85 | 279.90 | 279.94 | 279.99 | 280.03 | 280.07 280.12
632 280.16 | 280.21 | 280.25 | 280.30 | 280.34 } 280.38 | 280.43 | 280.47 | 280.52 | 280.56
| 633 280.61 | 280.65 | 280.70 | 280.74 | 280.78 | 280.83 | 280.87 | 280.92 | 280.96 | 281.01
634 281.05 | 281.09 | 281.14 | 281.18 | 281.23 | 281.27 | 281.32 | 281.36 | 281.40 | 281.45
635 281.49 | 281.54 | 281.58 | 281.63 | 281.67 | 281.71 | 281.76 | 281.80 | 281.85 | 281.89
| 636 281.94 | 281.98 | 282.02 | 282.07 | 282.11 | 282.16 | 282.20 | 282.25 | 282.29 | 282.34
37 282.38 | 282.42 | 282.47 | 282.51 | 282.56 | 282.60 | 282.65 | 282.69 | 282.73 | 282.78
6338 282.82 | 282.87 | 282.91 | 282.96 | 283.00 | 283.04 | 283.09 | 283.13 | 283.18 | 283.22
639 283.27 | 283.31 | 283.35 | 283.40 | 283.44 | 283.49 | 283.53 | 283.58 | 283.62 | 283.67 |
OF a |) rar ea a. ate Sais) teas aes |
C 28

COMPARISON OF THE METRICAL AND OLD FRENCH BAROME7ERS. 933

1 Millimetre = 0.443296 French Line.

=
Tenths of Millimetres.
Millime- |\_ Ce

tres. |
= Ge) oe ee) cee cae Ae ie. | aaa aes

| Par.lines. Par.lines.| Par.lines, Par.lines. Par.lines. Par lines. | Par lines,| Pax lines, | Par-lines. | Par.lines,
640 283.71 | 283.75 | 283.80 | 283.84 | 283.89 | 283.93 | 283.98 | 284.02 | 284.06 | 284.11
641 284.15 | 284.20 | 284.24 | 284.29 | 284.33 | 284.37 | 284.42 | 284.46 | 284.51 | 284.55
642 284.60 | 284.64 | 284.68 | 284.73 | 284.77 | 284.82 | 284.86 | 284.91 | 284.95 | 284.99
643 285.04 | 285.08 | 285.13 | 285.17 | 285.22 | 285.26 | 285.31 | 285.35 | 285.39 | 285.44
644 285.48 | 285.53 | 285.57 | 285.62 | 285.66 | 285.70 | 285.75 | 285.79 | 285.84 | 285.88

645 285.93 | 285.97 | 286.01 | 286.06 | 256.10 | 286.15 | 286.19 | 286.24 | 286.28 | 286.32
6416 286.37 | 286.41 | 286.46 | 286.50 | 286.55 | 286.59 | 286.64 | 226.68 | 286.72 | 286.77
647 286.81 | 286.86 | 286.90 | 286.95 | 286.99 | 287.03 | 287.08 | 257.12 | 287.17 | 287.21
648 287.26 | 287.30 | 287.34 | 287.39 | 287.43 | 287.48 | 287.52 | 287.57 | 287.61 | 287.65
649 287.70 | 287.74 | 287.79 | 287.83 | 287.88 | 287.92 | 287.96 | 288.01 | 288.05 | 288.10

@ st

650 288.14 | 288.19 | 288.23 | 288.28 | 288.32 | 288.36 | 288.41 | 288.45 | 288.50 | 288.54 |:
651 288.59 | 288.63 | 288.67 | 288.72 | 288.76 | 288.81 | 288.85 | 288.90 | 288.94 | 288.98
652 289.03 | 289.07 | 289.12 | 289.16 | 289.21 | 289.25 | 289.29 | 289.34 | 289.38 | 289.43
653 289.47 | 289.52 | 289.56 | 289.61 | 289.65 | 289.69 | 289.74 | 289.78 | 289.83 | 289.87
654 289.92 | 289.96 | 290.00 | 290.05 | 290.09 } 290.14 | 290.18 | 290.23 | 290.27 | 290.31

|

655 290.36 | 290.40 | 290.45 | 290.49 | 290.54 | 290.58 | 290.62 | 290.67 | 290.71 | 290.76
56 290.80 | 290.85 | 290.89 | 290.94 | 290.98 | 291.02 | 291.07 | 291.11 | 291.16 | 291.20
657 291.25 | 291.29 | 291.33 | 291.38 | 291.42 | 291.47 | 291.51 | 291.56 | 291.60 | 291.64
658 291.69 | 291.73 | 291.78 | 291.82 | 291.87 | 291.91 | 291.95 | 292.00 | 292.04 | 292.09
659 292.13 , 292.18 | 292.22 | 292.26 | 292.31 | 292.35 | 292.40 | 292.44 | 292.49 | 292.53
660 292.58 | 292.62 | 292.66 | 292.71 | 292.75 | 292.80 | 292.84 | 292.89 | 292.93 | 292.97
661 293.02 | 293.06 | 293.11 | 293.15 | 293.20 | 293.24 | 293.28 | 293.33 | 293.37 | 293.42
662 293.46 | 293.51 | 293.55 | 293.59 | 293.64 | 293.68 | 293.73 | 293.77 | 293.82 | 293.86
| 663 293.91 | 293.95 ; 293.99 | 294.04 | 294.08 | 294.13 | 294.17 | 294.22 | 294.26 | 294.30
664 294.35 | 294.39 | 294.44 | 294.48 | 294.53 | 294.57 | 294.61 | 294.66 | 294.70 | 294.75

665 294.79 | 294.84 | 294.88 | 294.92 | 294.97 | 295.01 | 295.06 | 295.10 | 295.15 | 295.19
666 295.24 | 295.28 | 295.32 | 295.37 | 295.41 | 295.46 | 295.50 | 295.55 | 295.59 | 295.63
667 295.68 | 295.72 | 295.77 | 295.81 | 295.86 | 295.90 | 295.94 | 295.99 | 296.03 | 296.08
668 296.12 | 296.17 | 296.21 | 296.25 | 296.30 | 296.34 | 296.39 | 296.43 | 296.48 | 296.52
669 296.56 | 296.61 | 296.65 | 296.70 | 296.74 | 296.79 | 296.83 | 296.88 | 296.92 | 296.96

670 297.01 | 297.05 | 297.10 | 297.14 | 297.19 | 297.23 | 297.27 | 297.32 | 297.36 | 297.41
297.45 | 297.50 | 297.54 | 297.58 | 297.63 | 297.67 | 297.72 | 297.76 | 297.81 | 297.85
672 297.89 | 297.94 | 297.98 | 298.03 | 298.07 | 298.12 | 298.16 | 298.21 | 298.25 | 298.29

aD
~
—

673 298.34 | 298.38 | 298.43 | 298.47 | 298.52 | 298.56 | 298.60 | 298.65 | 298.69 | 298.74
674 298.78 | 298.83 | 298.87 | 298.91 | 298.96 | 299.00 | 299.05 | 299.09 | 299.14 | 299.18

675 299.22 | 299.27 | 299.31 | 299.36 | 299.40 | 299.45 | 299.49 | 299.54 299.58 | 299.62
676 299.67 | 299.71 | 299.76 | 299.80 | 299.85 | 299.89 | 299.93 | 299.98 | 300.02 | 300.07
677 300.11 | 300.16 | 300.20 | 300.24 | 300.29 | 300.33 | 300.38 | 300.42 | 300.47 | 300.51
678 300.55 | 300.60 | 300.64 | 300.69 | 300.73 | 300.78 | 300.82 | 300.86 | 300.91 | 300.95
679 301.00 | 301.04 | 301.09 | 301.13 | 301.18 } 301.22 | 301.26 | 301.31 | 301.35 | 301.40

0. i. 2. 3. 4. 3. 6. 7. 8s. | 9. |

o 29

9384 COMPARISON OF THE METRICAL AND OLD FRENCH BAROMETERS.
1 Millimetre = 0.443296 French J ine.
ian = = aia aan ho rath
Tenths of Millimetres.
Millime- dire a |
tres.

0. i. 2. 3. 4. oO. 6. 7 8. 9.
ae anes Par.lines. Par.lines, | Par.lines, Par.lines. Par.lines. Par.lines. | Par.lines. Par. lines, | Par lines, orn
680 301.44 | 301.49 | 301.53 | 301.57 | 301.62 } 301.66 | 301.71 | 301.75 | 301.80 | 301.84
681 301.88 | 301.93 | 301.97 | 302.02 | 302.06 | 302.11 | 302.15 | 302.19 | 302.24 | 302.28
652 302.33 | 302.37 | 302.42 | 302.46 | 302.51 | 302.55 | 30259 | 302.64 | 302.68 | 302.73
683 302.77 | 302.82 | 302.86 | 302.90 | 302.95 | 302.99 | 303.04 | 303.08 | 303.13 | 303.17
684 303.21 | 303.26 | 303.30 | 303.35 | 303.39 | 303.44 | 303.48 | 303.52 | 303.57 | 303.61
685 303.66 | 303.70 | 303.75 | 303.79 | 303.83 | 303.88 | 303.92 | 303.97 | 304.01 | 304.06
686 304.10 | 304.15 | 304.19 | 304.23 | 304.28 | 304.32 | 304.37 | 304.41 | 304.46 | 304.50
687 304.54 | 304.59 | 304.63 | 304.68 | 304.72 | 304.77 | 304.81 | 304.85 | 304.90 | 304.94
688 304.99 | 305.03 | 305.08 | 305.12 | 305.16 | 305.21 | 305.25 | 305.30 | 305.34 | 305.39
689 305.43 | 305.48 | 305.52 | 305.56 | 305.61 | 305.65 | 305.70 | 305.74 | 305.79 | 305.83
690 305.87 | 305.92 | 305.96 | 306.01 | 306.05 | 306.10 | 306.14 | 306.18 | 306.23 | 306.27
691 306.32 | 306.36 | 306.41 | 306.45 | 306.49 | 306.54 | 306.58 | 306.63 | 306.67 | 306.72
692 306.76 | 306.81 | 306.85 | 306.89 | 306.94 | 306.98 | 307.03 | 307.07 | 307.12 | 307.16
693 307.20 | 307.25 | 307.29 | 307.34 | 307.38 | 307.43 | 307.47 | 307.51 | 307.56 | 307.60
694 307.65 | 307.69 | 307.74 | 307.78 | 307.82 | 307.87 | 307.91 | 307.96 | 308.00 | 308.05
695 308.09 | 308.13 | 308.18 | 308.22 | 308.27 | 308.31 | 308.36 | 308.40 | 308.45 | 308.49
696 308.53 | 308.58 | 308.62 | 308.67 | 308.71 | 308.76 | 308.80 | 308.84 | 308.89 | 308.93
697 308.98 | 309.02 | 309.07 | 309.11 | 309.15 | 309.20 | 309.24 | 309.29 | 309.33 | 309.38
698 309.42 | 309.46 | 309.51 | 309.55 | 309.60 7 309.64 | 309.69 | 309.73 | 309.78 | 309.82
699 309.86 | 309.91 | 309.95 | 310.00 | 310.04 | 310.09 | 310.13 | 310.17 | 310.22 | 310.26
700 310.31 | 310.35 | 310.40 | 310.44 | 310.48 | 310.53 | 310.57 | 310.62 | 310.66 | 310.71
701 310.75 | 310.79 | 310.84 | 310.88 | 310.93 | 310.97 | 311.02 | 311.06 | 311.11 | 311.15
702 311.19 | 311.24 | 311.28 | 311.33 | 311.37 | 311.42 | 311.46 | 311.50 | 311.55 | 311.59
703 311.64 311.68 | 311.73 | 311.77 | 311.81 | 311.86 | 311.90 | 311.95 | 311.99 | 312.04
704 312.08 | 312.12 | 312.17 | 312.21 | 312.26 | 312.30 | 312.35 | 312.39 | 312.43 | 312.48
705 312.52 | 312.57 | 312.61 | 312.66 | 312.70 | 312.75 | 312.79 | 312.83 | 312.88 | 312.92
706 312.97 | 313.01 | 313.06 | 313.10 | 313.14 | 313.19 | 313.23 | 313.28 | 313.32 | 313.37
707 313.41 | 313.45 | 313.50 | 313.54 | 313.59 | 313.63 | 313.68 | 313.72 | 313.76 | 313.81
708 313.85 | 313.90 | 313.94 | 313.99 | 314.03 | 314.08 | 314.12 | 314.16 | 314.21 | 314.25
709 314.30 | 314.34 | 314.39 | 314.43 | 314.47 | 314.52 | 314.56 | 314.61 | 314.65 | 314.70
710 314.74 | 314.78 | 314.83 | 314.87 | 314.92 | 314.96 | 315.01 | 315.05 | 315.09 | 315.14
711 315.18 | 315.23 | 315.27 | 315.32 | 315.36 | 315.41 | 315.45 | 315.49 | 315.54 | 315.58
712 315.63 | 315.67 | 315.72 | 315.76 | 315.80 }| 315.85 | 315.89 | 315.94 | 315.98 | 316.03
713 316.07 | 316.11 | 316.16 | 316.20 | 316.25 | 316.29 | 316.34 | 316.38 | 316.42 | 316.47
714 316.51 | 316.56 | 316.60 | 316.65 | 316.69 | 316.73 | 316.78 | 316.82 | 316.87 | 316.91
715 316.96 | 317.00 | 317.05 | 317.09 | 817.13 | 317.18 | 317.22 | 317.27 | 317.31 | 317.36
716 317.40 | 317.44 | 317.49 | 317.53 | 317.58 | 317.62 | 317.67 | 317.71 | 317.75 | 317.80
717 317.84 | 317.89 | 317.93 | 317.98 | 318.02 | 318.06 | 318.11 | 318.15 | 318.20 | 318.24
718 318.29 | 318.33 | 318.38 | 318.42 | 318.46 ] 318.51 | 318.55 | 318.60 | 318.64 | 318.69
719 318.73 | 318.77 | 318.82 | 318.86 | 318.91 | 318.95 | 319.00 | 319.04 | 319.08 | 319.13

0. 1. 2. 3. 4. de 6. 7 | 8. 9.
C 30

COMPARISON OF THE METRICAL AND OLD FRENCH BAROMETERS.

ho
oo
Ou

1 Millimetre = 0.448296 French Line.

|
|

See = ae nea

| Tenths of Millimetres.

Millime-
tres.

0. 1. 2. 3. 4. dD. 6. de 8. 9.

Par.lines. | Par.lines, | Par.lines.| Par.lines.| Par.lines. | Par.lines. | Par.lines. | Par.lines. | Par.lines. | Par.lines.
720 319.17 | 319.22 | 319.26 | 319.31 | 319.35 7 319.39 | 319.44 | 319.48 | 319.53 | 319.57
721 319.62 | 319.66 | 319.70 | 319.75 | 319.79 | 319.84 | 319.88 | 319.93 | 319.97 | 320.02
722 320.06 | 320.10 , 320.15 | 320.19 | 320.24 | 320.28 | 320.33 | 320.37 | 320.41 | 320.46
723 320.50 | 320.55 | 320.59 | 320.64 | 320.68 | 320.72 | 320.77 | 320.81 | 320.86 | 320.90
724 320.95 | 320.99 | 321.03 | 321.08 | 321.12 | 321.17 | 321.21 | 321.26 | 321.30 | 321.35

725 321.39 | 321.43 | 321.48 | 321.52 | 321.57 | 321.61 | 321.66 | 321.70 | 321.74 | 321.79
726 321.83 | 321.88 | 321.92 | 321.97 | 322.01 | 322.05 | 322.10 | 322.14 | 322.19 | 322.23
727 $22.28 | 322.32 | 322.36 | 322.41 | 322.45 | 322.50 | 322.54 | 322.59 | 322.63 | 322.68
728 322.72 | 322.76 | 322.81 | 322.85 | 322.90 | 322.94 | 322.99 | 323.03 | 323.07 | 323.12
729 323.16 | 323.21 | 323.25 | 323.30 | 323.34 | 323.38 | 323.43 | 323.47 | 323.52 | 323.56 |

730 323.61 | 323.65 | 323.69 | 323.74 | 323.78 | 323.83 | 323.87 | 323.92 | 323.96 | 324.00
733 324.94 | 324.98 | 325.02 | 325.07 | 325.11 | 325.16 | 325.20 | 325.25 | 325.29 | 325.33
737 326.71 | 326.75 | 326.80 | 326.84 | 326.89 | 326.93 | 326.98 | 327.02 | 327.06 | 327.11

731 $24.05 | 324.09 | 324.14 | 324.18 | 324.23 | 324.27 | 324.32 | 324.36 | 324.40 | 324.45 ff
734 325.38 | 325.42 | 325.47 | 325.51 | 325.56 | 325.60 | 325.65 | 325.69 | 325.73 | 325.78
735 325.82 | 325.87 | 325.91 | 325.96 | 326.00 | 326.04 | 326.09 | 326.13 | 326.18 | 326.22 |
738 327.15 | 327.20 | 327.24 | 327.29 | 327.33 | 327.37 | 327.42 | 327.46 | 327.51 | 327.55

732 324.49 | 324.54 | 324.58 | 324.63 | 324.67 | 324.71 | 324.76 | 324.80 | 324.85 | 324.89
736 326.27 | 326.31 | 326.35 | 326.40 | 326.44 | 326.49 | 326.53 | 326.58 | 326.62 | 326.66
739 327.60 | 327.64 | 327.68 | 327.73 | 327.77 | 327.82 | 327.86 | 327.91 | 327.95 | 327.99
740 328.04 | 328.08 | 328.13 | 328.17 | 328.22 | 328.26 | 328.30 | 328.35 | 328.39 | 328.14
741 328.48 | 328.53 | 328.57 | 328.62 | 328.66 | 328.70 | 328.75 | 328.79 | 328.84 | 323.88
7412 328.93 | 328.97 | 329.01 | 329.06 | 329.10 | 329.15 | 329.19 | 329.24 | 329.28 | 329.32

743 329.37 | 329.41 | 329.46 | 329.50 | 329.55 | 329.59 | 329.63 | 329.68 | 329.72 | 329.77 |
744 329.81 | 329.86 | 329.90 | 329.95 | 329.99 | 330.03 | 330.08 | 330.12 | 330.17 | 330.21 |

745 330.26 | 330.30 | 330.34 | 330.39 | 330.43 | 330.48 | 330.52 | 330.57 | 330.61 | 330.65

746 330.70 | 330.74 | 330.79 | 330.83 | 330.88 | 330.92 | 330.96 | 331.01 | 331.05 | 331.10

TAT 331.14 | 331.19 | 331.23 | 331.28 | 331.32 | 331.36 | 331.41 | 331.45 |.331.50 | 331.54 |}

748 331.59 | 331.63 | 331.67 | 331.72 | 331.76 | 331.81 | 331.85 | 331.90 | 331.94 | 331.98 ||
1

332.03 | 332.07 | 332.12 | 332.16 | 332.21 | 332.25 | 332.29 | 332.34 | 332.38 | 332.43

332.47 | 332.52 | 332.56 | 332.60 | 332.65 | 332.69 | 332.74 | 332.78 | 332.83 | 332.87
332.92 | 332.96 | 333.00 | 333.05 | 333.09 | 333.14 | 333.18 | 333.23 | 333.27 | 333.31
333.36 | 333.40 | 333.45 | 333.49 | 333.54 | 333.58 | 333.62 | 333.67 | 333.71 | 333.76

333.80 | 333.85 | 333.89 | 333.93 | 333.98 | 334.02 | 334.07 | 334.11 | 334.16 | 334.20 |
334.25 | 334.29 | 334.33 | 334.38 | 334.42 | 334.47 | 334.51 | 334.56 | 334.60 | 334.64

334.69 | 334.73 | 334.78 | 334.82 | 334.87 | 334.91 | 334.95 | 335.00 | 335.04 | 335.09
335.13 | 335.18 | 335.22 | 335.26 |°335.31 | 335.35 | 335.40 | 335.44 | 335.49 | 335.53
335.58 | 335.62 | 335.66 | 335.71 | 335.75 | 335.80 | 335.84 | 335.89 | 335.93 | 335.97
336.02 | 336.06 | 336.11 | 336.15 | 336.20 | 336.24 | 336.28 | 336.33 | 336.37 | 336.42
336.46 | 336.51 | 336.55 | 336.59 | 3°6.64 | 336.68 | 336.75 | 336.77 | 336.82 | 336.86

0. 1. 2. 3. i 4. aD. 6. Ge 8. 9.

C 31

936 COMPARISON OF THE METRICAL AND OLD FRENCH BAROMETERS.,
1 Millimetre = 0.443296 French Line
|
Tenths of Millimetres.
Millime-
tres. =
0. 1. 2. Be 4. 3. 6. Ze 8. 9.
at Par.lines, Paniines Paviitieg.| Par linuas| Pax iiaeet Partines’|Parlines!|Paiiness Parnes (Partita
760 336.90 | 336.95 | 336.99 | 337.04 | 337.08 | 337.13 | 337.17 | 337.22 | 337.26 | 337.30
761 337:35 | 337.39 | 337.44 | 337.48 | 337.53 | 337.57 | 337.61 | 337.66 | 337.70 | 337.75
762 337.79 | 337.84 | 337.88 | 337.92 | 337.97 | 338.01 | 338.06 | 338.10 | 338.15 | 338.19
763 338.23 | 338.28 | 338.32 | 338.37 | 338.41 | 338.46 .| 338.50 | 338.55 | 338.59 | 338.63
764 338.68 | 338.72 | 338.77.| 338.81 | 338.56 | 338.90 | 338.94 | 338.99 | 339.03 | 339.08
765 339.12 | 339.17 | 339.21 | 339.25 | 339.30 | 339.34 | 339.39 | 339.43 | 339.48 | 339.52
766 339.56 | 339.61 | 339.65 | 339.70 | 339.74 | 339.79 | 339.83 | 339.87 | 339.92 | 339.96
767 340.01 | 340.05 | 340.10 | 340.14 | 340.19 } 340.23 | 340.27 | 340.32 | 340.36 | 340.41
768 340.45 | 340.50 | 340.54 | 340.55 | 340.63 | 340.67 | 340.72 | 310.76 | 340.81 | 340.85
769 340.89 | 340.94 | 340.98 | 341.03 | 341.07 | 341.12 | 341.16 | 341.20 | 341.25 | 341.29
770 341.34 | 341.38 | 341.43 | 341.47 | 341.52 | 341.56 | 341.60 | 341.65 | 341.69 | 341.74
ad 341.78 | 341.83 | 341.87 | 341.91 | 341.96 | 342.00 | 342.05 | 342.09 | 342.14 | 342.18
772 312.22 | 342.27 | 342.31 | 342.36 | 342.40 | 342.45 | 342.49 | 342.53 | 342.58 | 342.62
773 342.67 | 342.71 | 342.76 | 342.80 | 342.85 | 342.89 | 342.93 | 342.98 | 343.02 | 343.07
774 343.11 | 343.16 | 343.20 | 343.24 | 343.29 | 343.33 | 343.38 | 343.42 | 343.47 | 343.51
775 343.55 | 343.60 | 343.64 | 343.69 | 313.73 | 343.78 | 343.82 | 343.86 | 343.91 | 343.95
776 344.00 | 344.04 | 344.09 | 344.13 | 344.17 | 344.22 | 344.26 | 344.31 | 344.35 | 344.40
T77 $44.44 | 344.49 | 344.53 | 344.57 | 344.62 | 344.66 | 344.71 | 344.75 | 344.80 | 344.84
778 344.88 | 344.93 | 344.97 | 345.02 | 345.06 | 345.11] | 345.15 | 345.19 | 345.24 | 345.28 |
779 345.33 | 345.37 | 345.42 | 345.46 | 345.50 | 345.55 | 345.59 | 345.64 | 345.68 | 345.73
780 345.77 | 345.82 | 345.86 | 345.90 | 345.95 | 345.99 | 346.04 | 346.08 | 346.13 | 346.17
781 346.21 | 346.26 | 346.30 | 346.35 | 316.39 | 346.44 | 3146.48 | 346.52 | 346.57 | 346.61
782 346.66 | 346.70 | 346.75 | 346.79 | 346.83 | 346.88 | 346.92 | 346.97 | 347.01 | 347.06
783 347.10 | 347.15 | 347.19 | 347.23 | 347.28 | 347.32 | 347.37 | 347.41 | 347.46 | 347.50
784 347.54 | 347.59 | 347.63 | 347.68 | 347.72 | 347.77 | 347.81 | 347.85 | 347.90 | 347.94
785 347.99 | 348.03 | 348.08 | 348.12 | 348.16 | 348.21 | 348.25 | 348.30 | 348.34 | 3148.39
786 348.43 | 348.47 | 348.52 | 348.56 | 348.61 | 348.65 | 348.70 | 348.74 | 348.79 | 348.83
787 348.87 | 348.92 | 348.96 | 349.01 | 349.05 | 349.10 | 349.14 | 349.18 | 349.23 | 349.27
788 349.32 | 349.36 | 349.41 | 349.45 | 349.49 | 349.54 | 349.58 | 349.63 | 349.67 | 349.72
«So 349.76 | 349.80 | 349.85 | 349.89 | 349.94 | 349.98 | 350.03 | 350.07 | 350.12 | 350.16
790 350.20 | 350.25 | 350.29 | 350.34 | 350.38 | 350.43 | 350.47 | 350.51 | 350.56 | 350.60
791 350.65 | 350.69 | 350.74 | 350.78 | 350.82 | 350.87 | 350.91 | 350.96 | 351.00 | 351.05
792 351.09 | 351.13 | 351.18 | 351.22 | 351.27 | 351.31 | 351.36 | 351.40 | 351.44 | 351.49
793 351.53 | 351.58 | $51.62 | 351.67 | 351.71 | 351.76 | 351.80 | 351.84 | 351.89 | 351.93
79A 351.98 | 352.02 | 352.07 | 352.11 | 352.15 | 352.20 | 352.24 | 352.29 | 352.33°| 352.38
795 352.42 | 352.46 | 352.51 | 352.55 | 352.60 | 352.64 | 352.69 | 352.73 | 352.77 | 352.82
796 352.86 | 352.91 | 352.95 | 353.00 | 353.04 | 353.09 | 353.13 | 353.17 | 353.22 | 353.26
797 353.31 | 353.35 | 353.40 | 353.44 | 353.48 | 353.53 | 353.57 | 353.62 | 353.66 | 353.71
798 353.75 | 353.79 | 353.84 | 353.88 | 353.93 | 353.97 | 354.02 | 354.06 | 354.10 | 354.15
799 854.19 | 354.24 | 354.28 | 354.33 | 354.37 | 354.42 | 354.46 | 354.50 | 354.55 | 354.59
800 354.64 | 354.68 | 354.73 | 354.77 | 354.81 | 354.86 | 354.90 | 354.95 | 354.99 | 355.04
. 0. | 1. 2. 3. 4. 3d. 6. Te 8. ee
C 32

237

My avele

COMPARISON

OF

EE OLDE tN CAE BAR OME TE

WITH

THE ENGLISH AND THE METRICAL BAROMETERS,

PA Be Geis

FOR CONVERTING FRENCH OR PARIS LINES INTO ENGLISH INCHES
AND DECIMALS, AND INTO MILLIMETRES ;

GIVING THE VALUES CORRESPONDING TO EVERY PARIS LINE FROM 120 TO 216
LINES, OR FROM 10 TO 18 INCHES; AND TO EVERY TENTH OF A LINE
FROM 216. TO 348 LINES, OR FROM 18 TO 29 FRENCH INCHES.

238

TABLE V.

MM. J. J. Pohl and J. Schabus have published, in the number for March, 1852,
of the Proceedings of the Imperial Academy of Vienna, Class of Mathematics and
Natural Philosophy, a set of short Thermometrical and Barometrical Reduction
Tables, among which is found a table for the reduction of the Old French Bare
metrical Scale into the English. As this table shows slight discrepancies from the
one given in the following pages, it may not be out of place to state that they arise
from an accidental error in the equation used by MM. Pohl and Schabus in com-

puting their table. Adopting, as they do, Bird’s value of the metre, viz.
1 metre = 39.37062 English inches,

the value of the Paris line is

1 Paris line = 0.088813 English inches.

But the table seems to have been computed by using the equation
1 Paris line = 0.088823 English inches,
which gives, at the end of the table,

348 lines x .088823 = 30.9104 English inches,
instead of

348 “ »~x .088813 = 30.9069 ee sé
thus causing an error = 0.0035 66 ec

which, of course, gradually diminishes in lower numbers.

>!

ol eek ee

oy

V. COMPARISON OF THE OLD FRENCH AND ENGLISH BAROMETERS.

1 Paris Line = 0.088814 English Inch

French or | Units.
Paris
Lines. )
oe 0. 1. 2. oe 4. se | Go| nae 8. | 9.
| 10 Inch. |, Eng. In. | Eng In. | Eng. In. | Eng. In. | Eng In | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In.
ie 20 10.658 | 10.746 | 10.835 | 10.924 | 11.013] 11.102 | 11.191 11.279 | 11.368 11.457
130 || 11. 546 11.635 | 11.723 11.812 | 11.901] 11.990 | 12.079 12.168 | 12.256 | 12.315
140 || 12.434 | 12.523 | 12.612 | 12.700 | 12.789} 12.878 | 12.967 | 13.056 | 13.144 | 13.233
i450, || 13.322 | | 13.411 | 13.500 | 13.589 | 13.677] 13.766 | 13.855 | 13.944 | 14.033 | 14.121
| 160 || 14.210 | 14.299 14.388 T4477 | 14.565] 14.654 | 14.743 | 14.832 | 14.921 | 15.010
170 || 15.098 | 15.187 | 15.276 | 15.365 | 15.454 eae 15.631 | | 15.720 | 15.809 15.898
180 | 15987 16.075 | 16.164) 16.253 | 16.342] 16.431 | 16.519 | 16.608 | 16.697 | 16.786
| 190 || 16.875 | 16.963 | 17.052 | 17.141 | 17.230 17.319 | 17.408 | 17.496 | 17.585 | 17.674 ||
| 200 || 17.763 | 17.852 | 17.940 | 18.029 | 18.118 18.207 | 18.296 18.384 | 18.473 | 18.562
| 210 || 18.651 18.740 | 18.829 | 18.917 | 19.006 | 19.095. | 19.184 | 19.273 | 19.361 | 19.450 |)
Tenths.
eae |
Pied eke bi Pah | Bet Mec Bel Gan | Fe | 18.) fog
Bt ‘| de ct _||
| 18 Inch. || Eng. In. | Eng. In. | Eng In. Eng In | Eng. In. } Eng. In. | Eng. In. | Eng. In. | Eng. In. Eng. In
| 216 || 19.184 | 19.193 | 19.202 | 19.210 | 19.219 19.228 | 19.237 | 19.246 | 19.255 19.264
217 || 19.273 | 19.252 | 19.290 | 19.299 | 19.308} 19.317 | 19.326 | 19 335 | 19.344 | 19.353
218 || 19.361 | 19.370 | | 19.379 | 19.388 | 19.397] 19.406 | 19.415 19.424 19.433 19.441
219 || 19.450 | 19.459 | 19.468 | 19.4177 | 19.486] 19.495 | 19.504 | 19.512 | 19.521 19.53
220 || 19.539 | 19.548 | 19.557 | 19.566 | 19.575 | 19.583 19.592 | 19.601 | 19.610 19.619
221 | 19.628 | | 19.637 | 19.646. | 19.655 19.663 19.672 | 19.681 | 19.690 19.699 19.708 ||
| | |
Ven 222) || 19: 77) 19.726 | 19.734. 19.743 | 19.752] 19.761 | 19.770 | 19.779 | 19.788 | 19.797
| 223 || 19.806 | 19.814 | 19.823 | 19.832 | 19.840 19.850. 19.859 19.868 | 19.877. 19.885
| 224 | 19.894 | 19.903 | 19.912 | 19.921 | 19.930] 19.939 | 19-948 | 19.957 | | 19.965 19.974
| 225 || 19.983 | 19.992 | 20.001 | 20.010 | 20.019} 20.028 | 20.036 | 20.045 | 20.054 | 20.063
| 226 || 20.072 20.081 | 20.090 20.099 | 20.107] 20.116 | 20.125 20.134 20.143 20.152
227 || 20.161 | 20.170 | 20.179 | 20.187 | 20.196] 20.205 | 20.214 | 20.223 | 20.232 20.241
19 Inch. | | | | | | |
228 || 20.250 | 20.258 | 20.267 | 20.276 | 20.285 | 20.294 | 20.303 | 20.312 | 20.321 | 20.330
229 || 20.338 | 20.317 | 20.356 | 20.365 | 20.374| 20.383 20.392 20.401 | 20.109 | 20.418
230 20.427 | 20.436 | 20.445 20.454 | 20.463] 20.472 20.481 | 20.498 20.507
231 | 20.516 20.525 | 20.534 | 20.543 | 20.552 | 20.560 | 20.569 | 20.578 | 20.587 20.596
232 || 20.605 | 20.614 | 20.623 | 20.631 | 20.640} 20.649 | 20.658 . 20.667 | 20.676 20.685
233 || 20.694 | 20.703 | 20.711 | 20.720 | 20.729 | 20.738 | 20.747 | 20.756 | 20.765 | 20.774
| | | | |
234 | 20.782 | 20.791 | 20.800 | 20.809 | 20.818] 20.827 | 20.836 | 20.8145 20.854 20.862 ||
235 | 20.871 20.880 20.889 | 20.898 | 20.907} 20.916 20.925 20.933 20.942 20.951
236 | 20.960 20.969 | 20.978 | 20.987 | 20.996 | 21.005 | 21.013 | 21.022 | 21.031 | 21.040
237 | 21.049 | 21.058 | 21.067 | 21. 076 21.084] 21.093 21.102 | 21.111 | 21.120 | 21.129
238 || 21.138 | 21.147 | 21.155 | 21.164 | 21.173] 21.182 | 21.191 | 21.200 | 21.209 | 21.218
239 | 21.227 | 21.235 | 21.244 | 21.253 | 21.262] 21.271 | 21.280 | 21.289 | 21.298 | 21.306
Hundredths of a Line.
0. nes Oe eo te | Soe
-000 001 | .002 003 | 004 004 | 005 | .006 | 007 | .008
C 35

240

o

COMPARISON

OF THE OLD FRENCH AND ENGLISH BAROMETERS.

1 Paris Line = 0.088814 English Inch.

Tenths of a Line.
; French or SS
ParisLines.
0. i. Ds Be 4. de 6. 7 8. 9.
20 Inches. |} Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In,
| 240 21.315 | 21.324 | 21.333 | 21.342 | 21.351 | 21.360 | 21.369 | 21.378 | 21.386 | 21.395
241 21.404 | 21.413 | 21.422 | 21.431 | 21.440 | 21.449 | 21.457 | 21.466 | 21.475 | 21.4184
242 21.493 | 21.502 | 21.511 | 21.520 | 21.529 | 21.537 | 21.546 | 21.555 | 21.564 | 21.573
243 21.582 | 21.591 | 21.600 | 21.608 | 21.617 | 21.626 | 21.635 | 21.644 | 21.653 | 21.662
| 244 21.671 | 21.679 | 21.688 | 21.697 | 21.706 | 21.715 | 21.724 | 21.733 | 21.742 | 21.751
245 21.759 | 21.768 | 21.777 | 21.786 | 21.795 | 21.804 | 21.813 | 21.822 | 21.830 | 21.839
246 21.848 | 21.857 | 21.866 | 21.875 | 21.884 | 21.893 | 21.902 | 21.910 | 21.919 | 21.928
217 21.937 | 21.946 | 21.955 | 21.964 | 21.973 | 21.981 | 21.990 | 21.999 | 22.008 | 22.017
248 22.026 | 22.035 | 22.044 | 22.053 | 22.061 | 22.070 | 22.079 | 22.088 | 22.097 | 22.106
249 22.115 | 22.124 | 22.132 | 22.141 | 22.150 | 22.159 | 22.168 | 22.177 | 22.186 | 22.195
250 22.203 | 22.212 | 22.221 | 22.230 | 22.239 | 22.248 | 22.257 | 22.266 | 22.275 | 22.283
251 22.292 | 22.301 ; 22.310 | 22.319 | 22.328 | 22.337 | 22.346 | 22.354 | 22.363 | 22.372
| 2LIn. =
| 252 22.381 | 22.390 | 22.399 | 22.408 | 22.417 | 22.426 | 22.434 | 22.443 | 22.452 | 22.461
253 22.470 | 22.479 | 22.488 | 22.497 | 22.505 | 22.514 |! 22.523 | 22.532 | 22.541 | 22.550
| 254 22.559 | 22.568 | 22.577 | 22.585 | 22.594 | 22.603 | 22.612 | 22.621 | 22.630 | 22.639
200 22.648 | 22.656 | 22.665 | 22.674 | 22.683 | 22.692 | 22.701 | 22.710 | 22.719 | 22.728
256 22.736 | 22.745 | 22.754 | 22.763 | 22.772 | 22.781 | 22.790 | 22.799 | 22.307 | 22.816
257 22.825 | 22.834 | 22.843 | 22.852 | 22.861 | 22.870 | 22.878 | 22.887 | 22.896 | 22.905
| 258 22.914 | 22.923 | 22.932 | 22.941 | 22.950 | 22.958 | 22.967 | 22.976 | 22.985 | 22.994
259 23.003 | 23.012 | 23.021 | 23.029 | 23.038 | 23.047 | 23.056 | 23.065 | 23.074 | 23.083
260 23.092 | 23.101 | 23.109 | 23.118 | 23.127 | 23.136 | 23.145 | 23.154 | 23.163 | 23.172
i” 261 23.180 | 23.189 | 23.198 | 23.207 | 23.216 | 23.225 | 23.234 | 23.243 | 23.252 | 23.260
262 23.269 | 23.278 | 23.287 | 23.296 | 23.305 | 23.314 | 23.323 | 23.331 | 23.340 | 23.349
263 23.358 | 23.367 | 23.376 | 23.385 | 23.394 | 23.402 | 23.411 | 23.420 | 23.429 | 23.438
|| 221In. = J
| 264 23.447 | 23.456 | 23.465 | 23.474 | 23.482 | 23.491 | 23.500 | 23.509 | 23.518 | 23.527
265 23.536 | 23.545 | 23.553 | 23.562 | 23.571 | 23.580 | 23.589 | 23.598 | 23.607 | 23.616
266 23.625 | 23.633 | 23.642 | 23.651 | 23.660 | 23.669 | 23.678 | 23.687 | 23.696 | 23.704
ane Grd, 23.713 | 23.722 | 23.731 | 23.740 | 23.749 | 23.758 | 23.767 | 23.776 | 23.784 | 23.793
268 23.802 | 23.811 | 23.820 | 23.829 | 23.838 | 23.847 | 23.855 | 23.864 | 23.873 | 23.882
269 23.891 | 23.900 | 23.909 | 23.918 | 23.926 | 23.935 | 23.944 | 23.953 | 23.962 | 23.971
270 23.980 | 23.989 | 23.998 | 24.006 | 24.015 | 24.024 | 24.033 | 24.042 | 24.051 | 24.060
271 24.069 | 24.077 | 24.086 | 24.095 | 24.104 | 24.113 | 24.122 | 24.131 | 24.140 24.149
272 24.157 | 24.166 | 24.175 | 24.184 | 24.193 |. 24.202 | 24.211 | 24.220 | 24.228 | 24.237
273 24.246 | 24.255 | 24.264 | 24.273 | 24.282 | 24.291 | 24.300 | 24.308 | 24.317 | 24.326
274 24.335 | 24.344 | 24.353 | 24.362 | 24.371 | 24.379 | 24.388 | 24.397 | 24.406 | 24.415
| 275 24.424 | 24.433 | 24.442 | 24.450 | 24.459 | 24.468 | 24.477 | 24.486 | 24.495 | 24.504
|
Hundredths of a Line.
0. 1. 2. 3: 4. 5. 6. me 8. 9.
[L 0600 -0009 0018 | .0027 | .0036 0044 | .0053 -0062 -0071 | 0080 |

Cc

COMPARISON OF THE OLD FRENCH AND ENGLISH BAROMETERS. 941

1 Paris Line = 0.088814 English Inch.
ein ee

Tenths of a Line.

French or |=
ParisLines.

0. 1. 2. 3. 4. de 6. Ve 8. 9.

—_—_— —

23 Inches. || Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In.
276 24.513 | 24.522 | 24.530 | 24.539 | 24.548 | 24.557 | 24.566 | 24.575 | 24.584 | 24.593
277 24.601 | 24.610 | 24.619 | 24.628 | 24.637 | 24.646 | 24.655 | 24.664 | 24.673 | 24.681
278 24.690 | 24.699 | 24.708 | 24.717 | 24.726 | 24.735 | 24.744 | 24.752 | 24.761 | 24.770
279 24.779 | 24.788 | 24.797 | 24.806 | 24.815 | 24.824 | 24.832 | 24.841 | 24.850 | 24.859
280 24.868 | 24.877 | 24.886 | 24.895 | 24.903 | 24.912 | 24.921 | 24.930 | 24.939 | 24.945
281 24.957 | 24.966 | 24.974 | 24.983 | 24.992 | 25.001 | 25.010 | 25.019 | 25.028 | 25.037

282 25.046 | 25.054 | 25.063 | 25.072 | 25.081 | 25.090 | 25.099 | 25.108 | 25.117 | 25.125
283 25.134 | 25.143 | 25.152 | 25.161 | 25.170 | 25.179 | 25.188 | 25.197 | 25.205 | 25.214
284 25.223 | 25.232 | 25.241 | 25.250 | 25.259 | 25.268 | 25.276 | 25.285 | 25.294 | 25.303
285 25.312 | 25.321 | 25.330 , 25.339 | 25.348 | 25.356 | 25.365 | 25.374 | 25.383 | 25.392
286 25.401 | 25.410 | 25.419 | 25.427 | 25.436 | 25.445 | 25.454 | 25.463 | 25.472 | 25.481
287 25.490 | 25.498 | 25.507 | 25.516 | 25.525 | 25.534 | 25.543 | 25.552 | 25.561 | 25.570
24In.=
288 25.578 | 25.587 | 25.596 | 25.605 | 25.614 | 25.623 | 25.632 | 25.641 | 25.649 | 25.658
289 25.667 | 25.676 | 25.685 | 25.694 | 25.703 | 25.712 | 25.721 | 25.729 | 25.738 | 25.747
290 25.756 | 25.765 | 25.774 | 25.783 | 25.792 | 25.800 | 25.809 | 25.818 | 25.827 | 25.836
291 25.845 | 25.854 | 25.863 | 25.872 | 25.880 | 25.889 | 25.898 | 25.907 | 25.916 | 25.925
292 25.934 | 25.943 | 25.951 | 25.960 | 25.969 | 25.978 | 25.987 | 25.996 | 26.005 | 26.014
293 26.023 | 26.031 | 26.040 | 26.049 | 26.058 | 26.067 | 26.076 | 26.085 | 26.094 | 26.102

294 26.111 | 26.120 | 26.129 | 26.138 | 26.147 }| 26.156 | 26.165 | 26.173 | 26.182 | 26.191
295 26.200 | 26.209 | 26.218 | 26.227 | 26.236 | 26.245 | 26.253 | 26.262 | 26.271 | 26.280
296 26.289 | 26.298 | 26.307 | 26.316 | 26.324 | 26.333 | 26.342 | 26.351 | 26.360 | 26.369
297 26.378 | 26.387 | 26.396 | 26.404 | 26.413 | 26.422 | 26.431 | 26.440 | 26.449 | 26.458
298 26.467 | 26.475 | 26.484 | 26.493 | 26.502 | 26.511 | 26.520 | 26.529 | 26.538 | 26.547
299 26.555 | 26.564 | 26.573 | 26.582 | 26.591 | 26.600 | 26.609 | 26.618 | 26.626 | 26.635
25 In. =
300 26.644 | 26.653 | 26.662 | 26.671 | 26.680 | 26.689 | 26.697 | 26.706 | 26.715 | 26.724
301 26.733 | 26.742 | 26.751 | 26.760 | 26.769 | 26.777 | 26.786 | 26.795 | 26.804 | 26.813
302 26.822 | 26.831 | 26.840 | 26.848 | 26.857 | 26.866 | 26.875 | 26.884 | 26.893 | 26.902
303 26.911 | 26.920 | 26.928 | 26.937 | 26.946 | 26.955 | 26.964 | 26.973 | 26.982 | 26.991
304 26.999 | 27.008 | 27.017 | 27.026 | 27.035 | 27.044 | 27.053 | 27.062 | 27.071 | 27.079

305 27.088 | 27.097 | 27.106 | 27.115 | 27.124 | 27.133 | 27.142 | 27.150 | 27.159 | 27.168

306 27.177 | 27.186 | 27.195 | 27.204 | 27.213 | 27.221 | 27.230 | 27.239 | 27.248 | 27.257
307 27.266 | 27.275 | 27.284 | 27.293 | 27.301 | 27.310 | 27.319 | 27.328 | 27.337 | 27.346
308 27.355 | 27.364 | 27.372 | 27.381 | 27.390 | 27.399 | 27.408 | 27.417 | 27.426 | 27.435
309 27.444 | 27.452 | 27.461 | 27.470 | 27.479 | 27.488 | 27.497 | 27.506 | 27.515 | 27.523
310 27.532 | 27.541 | 27.550 | 27.559 | 27.568 | 27.577 | 27.586 | 27.595 | 27.603 | 27.612

27.701

311 Hist? 27.630 | 27.639 | 27.648 | 27.657 | 27.666 | 27.674 | 27.683 | 27.692

Hundredths of a Line.

0. 4. 5.

-0036 -0044

1.

-0009

2. 3.

-0018 -0027

6. eos

0053 | .0062 | .0071 0080_|

.0000
C 37

DAI, COMLPARISON OF THE OLD FRENCH AND ENGLISH BAROMETERS.

1 Paris Line = 0.088814 English Inch.

Tenths of a Line.

French or
ParisLines.

0. 1. 2. Be 4. 5. 6. Ve 8. 9.

| 26 Inches. || Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In. | Eng. In.
| 312 27.710 | 27.719 | 27.728 | 27.737 | 27.745 | 27.754 | 27.763 | 27.772 | 27.781 | 27.790
313 27.799 | 27.808 | 27.817 | 27.825 | 27.834 | 27.843 | 27.852 | 27.861 | 27.870 | 27.879
314 27.888 | 27.896 | 27.905 | 27.914 | 27.923 | 27.932 | 27.941 | 27.950 | 27.959 | 27.968
315 27.976 | 27.985 | 27.994 | 28.003 | 28.012 | 28.021 | 28.030 | 28.039 | 28.047 | 28.056
316 28.065 | 28.074 | 28.083 | 28.092 | 28.101 | 28.110 | 28.119 | 28.127 | 28.136 | 28.145
317 28.154 | 28.163 | 28.172 | 28.181 | 28.190 | 28.198 | 28.207 | 28.216 | 28.225 | 28.234

318 28.243 | 28.252 | 28.261 | 28.269 | 28.278 | 28.287 | 28.296 | 28.305 | 28.314 | 28.323
319 28.332 | 28.341 | 28.349 | 28.358 | 28.367 | 28.376 | 28.385 | 28.394 | 28.403 | 28.412
320 28.420 | 28.429 | 28.438 | 28.447 | 28.456 | 28.465 | 28.474 | 28.483 | 28.492 | 28.500
321 28.509 | 28.518 | 28.527 | 28.536 | 28.545 | 28.554 | 28.563 | 28.571 | 28.580 | 28.589
322 28.598 | 28.607 | 28.616 | 28.625 | 28.634 | 28.643 | 28.651 | 28.660 | 28.669 | 28.678
323 28.687 | 28.696 | 28.705 | 28.714 | 28.722 | 28.731 | 28.740 | 28.749 | 28.758 | 28.767
27 In. =
324 28.776 | 28.785 | 28.793 | 28.802 | 28.811 | 28.820 | 28.829 | 28.838 | 28.847 | 28.856
325 28.865 | 28.873 | 28.882 | 28.891 | 28.900 | 28.909 | 28.918 | 28.927 | 28.936 | 28.944
326 28.953 | 28.962 | 28.971 | 28.980 | 28.989 | 28.998 | 29.007 | 29.016 | 29.024 | 29.033
327 29.042 | 29.051 | 29.060 | 29.069 | 29.078 | 29.087 | 29.095 | 29.104 | 29.113 | 29.122
328 29.131 | 29.140 | 29.149 | 29.158 | 29.167 | 29.175 | 29.184 | 29.193 | 29.202 | 29.211
329 29.220 | 29.229 | 29.238 | 29.246 | 29.255 | 29.264 | 29.273 | 29.282 | 29.291 | 29.300

330 29.309 | 29.318 | 29.326 | 29.335 | 29.344 | 29.353 | 29.362 | 29.371 | 29.380 | 29.389
331 29.397 | 29.406 | 29.415 | 29.424 | 29.433 | 29,442 | 29.451 | 29.460 | 29.468 | 29.477
332 29.486 | 29.495 | 29.504 | 29.513 | 29.522 | 29.531 | 29.540 | 29.548 | 29.557 | 29.566
333 29.575 | 29.584 | 29.593 | 29.602 | 29.611 | 29.619 | 29.628 | 29.637 | 29.646 | 29.655
334 29.664 | 29.673 | 29.682 | 29.691 | 29.699 | 29.708 | 29.717 | 29.726 | 29.735 | 29.744
335 29.753 | 29.762 | 29.770 | 29.779 | 29.788 } 29.797 | 29.806 | 29.815 | 29.824 | 29.833
28 In. =
336 29.842 | 29.850 | 29.859 | 29.868 | 29.877 | 29.886 | 29.895 | 29.904 | 29.913 |.29.921
337 29.930 | 29.939 | 29.948 | 29.957 | 29.966 | 29.975 | 29.984 | 29.992 | 30.001 | 30.010
338 30.019 | 30.028 | 30.037 | 30.046 | 30.055 | 30.064 | 30.072 | 30.081 | 30.090 | 30.099
339 30.108 | 30.117 | 30.126 | 30.135 | 30.143 | 30.152 | 30.161 | 30.170 | 30.179 | 30.188
340 30.197 | 30.206 | 30.215 | 30.223 | 30.232 | 30.241 | 30.250 | 30.259 | 30.268 | 30.277
341 30.286 | 30.294 | 30.303 | 30.312 | 30.321 | 30.330 | 30.339 | 30.348 | 30.357 | 30.366

342 30.374 | 30.383 | 30.392 | 30.401 | 30.410 | 30.419 | 30.428 | 30.437 | 30.445 | 30.454
343 30.463 | 30.472 | 30.481 | 30.490 | 30.499 | 30.508 | 30.516 | 30.525 | 30.534 | 30.543
344 30.552 | 30.561 | 30.570 | 30.579 | 30.588 | 30.596 | 30.605 | 30.614 | 30.623 | 30.632
345 30.641 | 30.650 | 30.659 | 30.667 | 30.676 | 30.685 | 30.694 | 30.703 | 30.712 | 30.721
346 30.730 | 30.739 | 30.747 | 30.756 | 30.765 | 30.774 | 30.783 | 30.792 | 30.801 | 39.810

347 30.818 | 30.827 | 30.836 | 30.845 | 30.854 | 30.863 | 30.872 | 30.881 | 30.890 | 30.898
29 In. =

30.969 | 30.978 | 30.987

30.907 | 30.916 | 30.925 | 30.934 | 30.943 | 30.952 | 30.961

Hundredths of a Line.

Ze 8. 9.

-0062 -0071 -0080

2.

-0018

Be

-0027

0 | 4.

—_——_—_——

4. 5. | 6.

0056

-0000 | .0009 -0044 | -0053

VI. COMPARISON OF THE OLD FRENCH AND METRICAL BAROMETERS. 9AZ

1 Paris Line = 2.255829 Millimetres.

French or
ParisLines.

Tens. 0. 1. es Be 4. de 6. Ze 8. 9.

10 Inch. Millim. | Millim. | Millim. | Millim. | Millim. Millim. | Millim. | Millim. | Millim. | Millim.
120 270.70 | 272.96 | 275.21 | 277.47 | 279.72 | 281.98 | 284.23 | 286.49 | 288.75 | 291.00
130 293.26 | 295.51 | 297.77 | 300.03 | 302.28 | 304.54 | 306.79 | 309.05 | 311.30 | 313.56
140 315.82 | 318.07 | 320.33 | 322.58 | 324.84 | 327.10 | 329.35 | 331.61 | 333.86 | 336.12 |
150 338.37 | 340.63 | 342.89 | 345.14 | 347.40 | 349.65 | 351.91 | 354.17 | 356.42 | 358.68
160 360.93 | 363.19 | 365.44 | 367.70 | 369.96 | 372.21 | 374.47 | 376.72 | 378.98 | 381.24

180 406.05 | 408.30 | 410.56 | 412.82 | 415.07 | 417.33 | 419.58 | 421.84 | 424.10 | 426.35
190 428.61 | 430.86 | 433.12 | 435.37 | 437.63 | 439.89 | 442.14 | 444.40 | 446.65 | 448.91
200 451.17 | 453.42 | 455.68 | 457.93 | 460.19 | 462.44 | 464.70 | 466.96 | 469.21 | 471.47
480.49 | 482.75 | 485.00 | 487.26 | 489.51 | 491.77 | 494.03

210 473.72 | 475.98 | 478.24

Tenths of a Line.

Paris

Lines. 0. 1. ee de 4. de 6. Ze 8. 9.

18 Inch. || Millim. | Millim. | Millim. | Millim. | Millim. Millim. Millim. | Millim. |} Millim. ; Millim.
216 487.26 | 487.48 | 487.71 | 487.94 | 488.16 | 488.39 | 488.61 | 488.84 | 489.06 | 489.29
217 489.51 | 489.74 | 489.97 | 490.19 | 490.42 | 490.64 | 490.87 | 191.09 | 491.32 | 491.55
218 491.77 | 492.00 | 492.22 | 492.45 | 492.67 | 492.90 | 493.12 | 493.35 | 493.58 | 493.80
219 494.03 | 494.25 | 494.48 | 494.70 | 494.93 | 495.15 | 495.38 | 495.61 | 495.83 | 496.06
220 496.28 | 496.51 | 496.73 | 496.96 | 497.18 | 4197.41 | 497.64 | 497.86 | 498.09 | 498.31
221 498.54 | 498.76 | 498.99 | 499.21 | 499.44 | 499.67 | 499.89 | 500.12 | 500.34 | 500.57

|
170 383.49 | 385.75 | 388.00 | 390.26 | 392.51 | 394.77 | 397.03 | 399.28 | 401.54 | 403.79

222 500.79 | 501.02 | 501.25 | 501.47 | 501.70 | 501.92 | 502.15 | 502.37 | 502.60 | 502.82 |
223 503.05 | 503.28 | 503.50 | 503.73 | 503.95 | 504.18 | 504.40 | 504.63 | 504.85 | 505.08
224 505.31 | 505.53 | 505.76 | 505.98 | 506.21 | 506.43 | 506.66 | 506.88 | 507.11 | 507.34
225 507.56 | 507.79 ; 508.01 | 508.24 | 508.46 | 508.69 | 508.91 | 509.14 | 509.37 | 509.59
226 509.82 | 510.04 | 510.27 | 510.49 | 510.72 | 510.95 | 511.17 | 511.40 | 511.62 | 511.85
227 512.07 | 512.30 | 512.52 | 512.75 | 512.98 | 513.20 | 513.43 | 513.65 | 513.88 | 514.10
19 Inch.
228 514.33 | 514.55 | 514.78 | 515.01 | 515.23 | 515.46 | 515.68 | 515.91 | 516.13 | 516.36
229 516.58 | 516.81 | 517.04 | 517.26 | 517.49 | 517.71 | 517.94 | 518.16 | 518.39 | 518.61
230 518.84 | 519.07 | 519.29 | 519.52 | 519.74 | 519.97 | 520.19 | 520.42 | 520.65 | 520.87
231 521.10 | 521.32 | 521.55 | 521.77 | 522.00 | 522.22 | 522.45 | 522.68 | 522.90 | 523.13
232 523.35 | 523.58 | 523.80 | 524.03 | 524.25 | 524.48 | 524.71 | 524.93 | 525.16 | 525.38
233 525.61 | 525.83 | 526.06 | 526.28 | 526.51 | 526.74 | 526.96 | 527.19 | 527.41 | 527.64

234 527.86 | 528.09 | 528.32 | 528.54 | 528.77 | 528.99 | 529.22 | 529.44 | 529.67 | 529.89
235 530.12 | 530.35 | 530.57 | 530.80 | 531.02 | 531.25 | 531.47 | 531.70 | 531.92 | 532.15
236 532.38 | 532.60 | 532.83 | 533.05 | 533.28 | 533.50 | 533.73 | 533.95 | 534.18 | 534.41
237 534.63 | 534.86 | 535.08 | 535.31 | 535.53 | 535.76 | 535.98 | 536.21 | 536.44 | 536.66
238 536.89 | 537.11 | 537.34 | 537.56 | 537.79 | 538.02 | 538.24 | 538.47 | 538.69 | 538.92
239 539.14 | 539.37 | 539.59 | 539.82 | 540.05 | 540.27 | 540.50 | 540.72 | 510.95 | 541.17

Tenths of a Line.

oo —O——e—e——aooaaaoEoaESEoaEoESEoaSESESaaBpaBanBmBESpa)hn]aaBaanaDSSSoSESoaaSaSaammQQ@QQQQQeeeeeeeeeeeeeaeeeeeeeeeeeeeeee TT eee

0. 1. 2. 3. 4. 5. 6. Ze 8. 9.
0.00 0.23 0.45 0.68 0.90 1.13 | 1.35 1.58 1.80 2.03

COMPARISON OF THE OLD FRENCH AND METRICAL BAROMETERS.

1 Paris Line = 2.255829 Millimetres.

Paris or
French =
tae: 0. 1. 2. 3. 4. 5. 6. 7. 8. 9.
20 Inches.!|! Millim. | Millim Millim. | Millim. | Millim. Millim. | Millim. | Millim. | Millim. | Millim.
240 541.40 | 541.62 | 541.85 | 542.08 | 542.301 512.53 | 542.75 | 542.98 | 543.20 | 543.43
241 543.65 | 543.88 | 544.11 | 544.33 | 544.56 | 544.78 | 545.01 | 545.23 | 545.46 | 545.69 ||
242 545.91 | 546.14 | 546.36 | 546.59 546.81 | 547.04 547-26 | 547.49 | 547.72 | 547.94 ||
243 548.17 | 548.39 | 548.62 | 555.94 | 549.67 9549.29 | 549.52 | 549.75 | 549.97 | 550.20 ||
244 550.42 | 550.65 | 550.87 | 551.10 | 551.32 | 551.55 | 551.78 | 552.00 | 552.23 | 552.45 ||
245 552.68 | 552.90 | 553.13 | 553.35 | 553.58 § 553.81 | 554.03 | 554.26 | 554.48 | 554.71
246 554.93 | 555.16 | 555.39 | 555.61 | 555.849556.06 | 556.29 | 556.51 | 556.74 | 556.96
247 557-19 | 557.42 | 557.64 | 557.87 | 558.09 # 558.32 | 558.54 | 558.77 | 558.99 | 559.22
248 559.45 | 559.67 | 559.90 | 560.12 | 560.35 | 560.57 | 560.80 | 561.02 | 561.25 | 561.48
249 561.70 | 561.93 | 562.15 | 562.38 | 562.60 | 562.83 | 563.05 | 563.28 | 563.51 | 563.73
250 563.96 | 564.18 | 564.41 | 564.63 | 564.86 | 565.09 | 565.31 | 565.54 | 565.76 | 565.99
251 566.21 | 566.44 | 566.66 | 566.89 | 567.12 | 567.34 | 567.57 | 567.79 | 568.02 | 568.24
1 Inches
252 568.47 | 568.69 | 568.92 | 569.15 | 569.37 | 569.60 | 569.82 | 570.05 | 570.27 | 570.50
253 570.72 | 570.95 | 571.18 | 571.40 | 571.63 | 571.85 | 572.08 | 572.30 | 572.53 | 572.75
254 572.98 | 573.21 | 573.43 | 573.66 | 573.88 ] 574.11 | 574.33 | 574.56 | 574.79 | 575.01
255 575.24 | 575.46 | 575.69 | 575.91 | 576.14 9576.36 | 576.59 | 576.82 | 577.04 | 577.27
256 577.49 | 577.72 | 577.94 | 578.17 | 578.39 | 578.62 | 578.85 | 579.07 | 579.30 | 579.52
257 579.73 | 679.97 | 580.20 | 580.42 | 580.65 | 580.88 | 581.10 | 581.33 | 581.55 | 581.78
258 582.00 | 582.23 | 582.46 | 582.68 | 582.91 1583.13 | 583.36 | 583.58 | 583.81 | 584.03
259 584.26 | 584.49 | 584.71 | 584.94 | 585.16 | 585.39 | 585.61 | 585.84 | 586.06 | 586.29
260 586.52 | 586.74 | 586.97 | 587.19 | 587.42 } 587.64 | 587.87 | 588.09 | 588.32 | 588.55
261 588.77 | 589.00 | 589.22 | 589.45 | 589.67 | 589.90 | 590.12 | 590.35 | 590.58 | 590.80
262 591.03 | 591.25 | 591.48 | 591.70 | 591.93 1592.16 | 592.38 | 592.61 | 592.83 | 593.06
263 593.28 | 593.51 | 593.73 | 593.96 | 594.19 | 594.41 | 594.64 | 594.86 | 595.09 | 595.31
22 Inches.
264 595.54 | 595.76 | 595.99 | 596.22 | 596.44] 596.67 | 596.89 | 597.12 | 597.34 | 597.57
265 597.79 | 598.02 | 598.25 | 598.47 | 598.70 | 598.92 | 599.15 | 599.37 | 599.60 | 599.82
266 600.05 | 600.28 | 600.50 | 600.73 | 600.95 | 601.18 | 601.40 | 601.63 | 601.86 | 602.08
267 602.31 | 602.53 | 602.76 | 602.98 | 603.21 | 603.43 | 603.66 | 603.89 | 604.11 | 604.34
268 604.56 | 604.79 | 605.01 | 605.24 | 605.46 | 605.69 | 605.92 | 606.14 | 606.37 | 606.59
269 606.82 | 607.04 | 607.27 | 607.49 | 607.72 ] 607.95 | 608.17 | 608.40 | 608.62 | 608.85
270 609.07 | 609.30 | 609.52 | 609.75 | 609.98 | 610.20 | 610.43 | 610.65 | 610.88 | 611.10
271 611.33 | 611.56 | 611.78 | 612.01 | 612.23 | 612.46 | 612.68 | 612.91 | 613.13 | 613.36
272 613.59 | 613.81 | 614.04 | 614.26 614.49 | 614.71 614.94 | 615.16 | 615.39 | 615.62
273 615.84 | 616.07 | 616.29 | 616.52 | 616.74] 616.97 | 617.19 | 617.42 | 617.65 | 617.87
274 618.10 | 618.32 | 618.55 | 618.77 | 619.00 | 619.23 | 619.45 | 619.68 | 619.90 | 620.13
275 620.35 | 620.58 | 620.80 | 621.03 | 621.26 | 621.48 | 621.71 | 621.93 | 622.16 | 622.38
Hundredths of a Line.
O. ) Ion | 2, || Sy | aan ees? || 6.) ae nes. pee |
| 0.000 0.023 0.045 0.068 0.090 | 0.113 0.135 0.158 0.180 | 0.203
fone ieee

eS es

COMPARISON OF THE OLD FRENCH AND METRICAL BAROMETERS. DAA
1 Paris Line = 2.255829 Millimetres.

Tenths of a Line.
Paris or
BS eae

|| Lines. 0. i 2. 3. 4, 5. | 6. "7. 8. 9. |

23 Inches.|| Millim. | Millim. | Millim. | Millim. | Millim. { Millim. | Millim. | Millim. | Millim. | Millim.
276 622.61 | 622.83 | 623.06 | 623.29 | 623.51 | 623.74 | 623.96 | 624.19 | 624.41 | 624.64 ||
277 624.86 | 625.09 | 625.32 | 625.54 | 625.77 ] 625.99 | 626.22 | 626.44 | 626.67 | 626.89
278 627.12 | 627.35 | 627.57 | 627.80 | 628.02 | 628.25 | 628.47 | 628.70 | 628.93 | 629.15
279 629.38 | 629.60 | 629.83 | 630.05 | 630.28 | 630.50 | 630.73 | 630.96 | 631.18 | 631.41
280 631.63 | 631.86 | 632.08 | 632.31 | 632.53 | 632.76 | 632.99 | 633.21 | 633.44 | 633.66

633.89 | 634.11 | 634.34 | 634.56 | 634.79 | 635.02 | 635.24 | 635.47 | 635.69 | 635.92

282 636.14 | 636.37 | 636.59 | 636.82 | 637.05
283 638.40 | 638.63 | 638.85 | 639.08 | 639.30
284 640.66 | 640.88 | 641.11 | 641.33 | 641.56
285 642.91 | 643.14 | 643.36 | 643.59 | 643.81
286 645.17 | 645.39 | 645.62 | 645.84 | 646.07
287 6147.42 | 647.65 | 647.87 | 648.10 | 648.33
24 inches.
288 649.68 | 649.90 | 650.13 | 650.36 | 650.58
289 651.93 | 652.16 | 652.39 | 652.61 | 652.84
290 654.19 | 654.42 | 654.64 | 654.87 | 655.09
291 656.45 | 656.67 | 656.90 | 657.12 | 657.35
292 658.70 | 658.93 | 659.15 | 659.38 | 659.60
293 660.96 | 661.18 | 661.41 | 661.63 | 661-86

637.27 | 637.50 | 637.72 | 637.95 | 638.17
639.53 | 639.75 | 639.98 | 640.20 | 640.43
641.78 | 642.01 | 642.23 | 643.46 | 642.69
644.04 | 644.26 | 644.49 | 644.72 | 644.94
646.30 | 646.52 | 646.75 | 646.97 | 647.20
648.55 | 648.78 | 649.00 | 649.23 | 649.45

N
wm
_

650.81 | 651.03 | 651.26 | 651.48 | 651.71
653.06 | 653.29 | 653.51 | 653.74 | 653.96
8655.32 | 655.54 | 655.77 | 656.00 | 656.22
| 657.57 | 657.80 | 658.03 | 658.25 | 658.48
1 659.83 | 660.06 | 660.28 | 660.51 | 660.73
662.09 | 662.31 | 662.54 | 662.76 | 662.99

294 || 663.21 | 663.44 | 663.66 | 663.89 | 664.12
295 || 665.47 | 665.70 | 665.92 | 666.15 | 666.37
296 __|| 667.73 | 667.95 | 668.18 | 668.40 | 668.63
297 || 669.98 | 670.21 | 670.43 | 670.66 | 670.88
298 672.24 | 672.46 | 672.69 | 672.91 | 673.14 |
299 || 674.49 | 674.72 | 674.94 | 675.17 | 675.40

25 Inches.
300 |! 676.75 | 676.97 | 677.20 | 677.43 | 677.65 | 677.88 | 678.10 | 678.33 | 678.55 | 678.78
301 || 679.00 | 679.28 | 679.46 | 679.68 | 679.91 ] 680.13 | 680.36 | 680.58 | 680.81 | 681.03
302 || 681.26 | 681.49 | 681.71 | 681.94 | 682.16 |
303 || 683.52 | 683.74 | 683.97 | 684.19 | 684.42 |
304 || 685.77 | 686.00 | 686.22 | 686.45 | 686.67
305 || 688.03 | 688.25 | 688.48 | 688.70 | 688.93

|
| 664.34 | 664.57 | 664.79 | 665.02 | 665.24 |
1 666.60 | 666.82 | 667.05 | 667.27 | 667.50
1668.85 | 669.08 | 669.30 | 669.53 | 669.76
671.11 | 671.33 | 671.56 | 671.79 | 672.01
673.36 | 673.59 | 673.82 | 674.04 | 674.27
1675.62 | 675.85 | 676.07 | 676.30 | 676.52

682.39 | 682.61 | 682.84 | 683.07 | 685.29
684.64 | 684.87 | 685.10 | 685.32 | 685.55
1 636.90 | 657.13 | 687.35 | 687.58 | 687.80
} 689.16 | 689.38 | 689.61 | 689.83 | 690.06

306 690.28 | 690.51 | 690.73 | 690.96 | 691.19 |
307 692.54 | 692.77 | 692.99 | 693.22 | 693.44
308 694.80 | 695.02 | 695.25 | 695.47 695.70 | 695.92 696.15 | 696.37 | 696.60 | 696.83
309 697.05 | 697.28 | 697.50 | 697.73 | 697.95 | 698.18 | 698.40 | 698.63 | 698.86 3
4
{
|

691.41 | 691.64 | 691.86 | 692.09 | 692.31
693.67 | 693.89 | 694.12 | 694.34 | 694.57

310 699.31 | 699.53 | 699.76 | 699.98 | 700.21 | 700.43 | 700.66 | 700.89 | 701.11 | 701.34
311 701.56 | 701.79 | 702.01 | 702.24 702.47 | 702.69 702.92 | 703.14 | 703.37 | 703.59

| Hundredths of a Line.
|

at

0. oo => 3. 4. 5. 6. %. s. 9.

ee |

0.000 0.023 0.045 0.068 0.090 0.113 0.135 0.158 0.180 | 0.203

Cc 4]

246

COMPARISON OF THE OLD FRENCH AND

1 Paris Line = 2.255829 Millimetres.

METRICAL BAROMETERS.

| ts 3
Tenths of a Line. F
Paris or
French py po] Sa ea vgE oT
Lines «50. 1. el.|| eB. te Go" | 87.5 |e: 9.
26 Inches.|| Millim. | Millim. Millini. Millim. Wl Millim. | Millim. Millim. | Millim. | Millim.
312 703.82 | 704.04 | 704.27 | 704.50 -72 | 704.95 | 705.17 ; 705.40 | 705.62 | 705.85
313 706.07 | 706.30 | 706.53 | 706.75 4707.20 | 707.43 | 707.65 | 707.88 | 708.10
314 708.33 | 708.56 | 708.78 | 709.01 709.46 | 709.68 | 709.91 | 710.13 | 710.36
315 710.59 | 710.81 | 711.04 | 711.26 711-71 | 711.94 | 712.17 | 712.39 | 712.62
316 712.84 | 713.07 | 713.29 | 713.52 1713.97 | 714.20 | 714.42 | 714.65 | 714.87
317 715.10 | 715.32 | 715.55 | 715.77 716.23 | 716.45 | 716.68 | 716.90 | 717.13
318 717.35 | 717.58 | 717.80 | 718.03 718.48 | 718.71 | 718.93 | 719.16 | 719.38
319 719.61 | 719.84 | 720.06 | 720.29 | 720.74 | 720.96 | 721.19 | 721.41 | 721.64
320 721.87 | 722.09 | 722.32 | 722.54 722.99 | 723.22 | 723.44 | 723.67 | 723.90
321 724.12 | 724.35 | 724.57 | 724.80 725.25 | 725.47 | 725.70 | 725.93 | 726.15
322 726.38 | 726.60 | 726.83 | 727.05 | 727.50 | 727.73 | 727.96 | 728.18 | 728.41
323 728.63 | 728.86 | 729.08 | 729.31 1729.76 | 729.99 | 730.21 | 730.44 | 730.66
27 Inches.
324 730.89 | 731.11 | 731.34 | 731.57 732.02 | 732.24 | 732.47 | 732.69 | 732.92
325 733.14 | 733.37 | 733.60 | 733.82 734.27 | 734.50 | 734.72 | 734.95 | 735.17
326 735.40 | 735.63 | 735.85 | 736.08 736.53 | 736.75 | 736.98 | 737.20 | 737.43
327 737.66 | 737.88 | 738.11 | 738.33 1738.78 | 739.01 | 739.24 | 739.46 | 739.69
328 739.91 | 740.14 | 740.36 | 740.59 j 741.04 | 741.27 | 741.49 | 741.72 | 741.94
329 742.17 | 742.39 | 742.62 | 742.84 743.30 | 743.52 | 748.75 | 743.97 | 744.20
330 744.42 | 744.65 | 744.87 | 745.10 745.55 | 745.78 | 746.00 | 746.23 | 746.45
331 746.68 | 746.90 | 747.13 | 747.36 | 747.81 | 748.03 | 748.26 | 748.48 | 748.71
332 748.94 | 749.16 | 749.39 | 749.61 1750.06 | 750.29 | 750.51 | 750.74 | 750.97
333 751.19 | 751.42 | 751.64 | 751.87 | 752.32 752.54 | 752.77 753.00 | 753.22
334 753.45 | 753.67 | 753.90 | 754.12 754.57 | 754.80 | 755.03 | 755.25 | 755.48
|| 335 755.70 | 755.93 | 756.15 | 756.38 756.83 | 757.06 | 757.28 | 757.51 | 757.73
28 Inches
336 = || 757.96 | 758.18 | 758.41 | 758.64 759.09 | 759.31 | 759.54 | 759.76 | 759.99
337 760.21 | 760.44 | 760.67 | 760.89 761.34 | 761.57 | 761.79 | 762.02 | 762.24
/ 838 762.47 | 762.70 | 762.92 | 763.15 1763.60 | 763.82 | 764.05 | 764.27 | 764.50
| 339 764.73 | 764.95 | 765.18 | 765.40 765.85 | 766.08 | 766.31 | 766.53 | 766.76
| 340 766.98 | 767.21 | 767.43 | 767.66 1768.11 | 768.34 | 768.56 | 768.79 769.01 ||
341 769.24 | 769.46 | 769.69 | 769.91 1 770.37 | 770.59 | 770.82 | 771.04 | 771.27 |j
342 771.49 | 771.72 | 771.94 | 772.17 1772.62 | 772.85 | 773.07 | 773.30 | 773.52
343 773.75 | 773.97 | 774.20 | 774.43 1774.88 | 775.10 | 775.33 | 775.55 | 775.78
344 || 776.01 | 776.23 | 776.46 | 776.68 777.13 | 777.36 | 777.58 | 777.81 | 778.04
j B45 778.26 | 778.49 | 778.71 | 778.94 | 779.39 | 779.61 | 779.84 | 780.07 | 780.29
) 346 780.52 | 780.74 | 780.97 | 781.19 1 781.64 | 781.87 | 782.10 | 782.32 | 782.55
347 782.77 | 783.00 | 783.22 | 783.45 1783.90 | 784.13 | 784.35 | 784.58 | 784.80
29 Inches.) | j
348 || 785.03 | 785.25 | 785.48 | 785.71 3786.16 | 786.38 | 786.61 | 786.83 787.06 |
| =
Hundredths of a Line. |
|
@. ||. 2, 3. ne 5. 6. 7 Us. | 9.
seaweed Ol eese Pegler Nees nee 4]: ee ee Eee Bed
; 0.000 | 0.023 0.045 0.068 0.090 } 0.113 0.135 0.158 0.180 | 0.203 |;

=

| 247

VIL. - VIII.

COMPARISON

OF

THE RUSSIAN BAROMETER

WITH
THE METRICAL AND THE OLD FRENCH BAROMETERS,

OR

Aer Ee ige Bes

FOR CONVERTING RUSSIAN HALF-LINES INTO MILLIMETRES,
AND INTO FRENCH OR PARIS LINES 5

GIVING THE VALUES CORRESPONDING TO EVERY HALF-LINE FROM 440 TO 540,
OR FROM 22 TO 27 INCHES; AND TO EVERY TENTH, FROM 540 TO 610
HALEF-LINES, OR FROM 27 TO 30.5 ENGLISH INCHES.

249

RU S'S? AN BAO yT ER:

A EEGULAR system of Meteorological Observations has been established by order
of the Russian government throughout the extensive regions placed umder its sway,
and a vast amount of observations made in Europe, in Asia, and in North America
have already been published. The scale of the barometer employed in this system
is divided in units, each of which is equal to one half of a Russian, or English
decimal line, that is, 1 = 0.05 of an inch, 600 half-lines of the Russian Barometer
being = 30 inches of the English Barometer.

The conversion of this scale, which is the English scale, slightly modified in its
form, is easy. It suffices to divide the Russian heights by two, and to put back, by
vne figure, the decimal point, in order to have them converted into English inches
and decimals. This transformation is so easy to effect, that a peculiar table for it
would seem superfluous.

The normal temperature of the standard being the same as that of the English,
that is, 18°£ Reaumur, or 62° Fahrenheit, the reduction of the Russian Barometer
to the freezing point can be made by means of the table for reducing the English
Barometers. But the attached thermometer being that of Reaumur, its indications
must be first converted into degrees of Fahrenheit.

Tables VII. and VIII., which follow, have been computed in order to render more
easy the comparison and the use of the Barometrical Observations recorded in the
large collection, published annually by order of the Emperor of Russia, under the
name of Annuaire Météorologique et Magnétique du Corps des Ingénieurs des

Mines.

250

Vil.

1 Russian Half-Line = 1.269977 Millimetres.

Units or Russian Half-Lines.

Russian
Bel ay hs abe lt ee, 1. | ee A ees aaa
22 Inch, Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim.
440 558.79 | 560.06 | 561.33 | 562.60 | 563.87 | 565.14 | 506.41
450 571.49 | 572.76 | 574.03 | 575.30 | 576.57 | 577.84 | 579.11
460 584.19 | 585.46 | 586.73 | 588.00 | 589.27 } 590.54 | 591.81
470 596.89 | 598.16 | 599.43 | 600.70 | 601.97 } 603.24 | 604.51
480 609.59 | 610.86 | 612.13 | 613.40 | 614.67 | 615.94 | 617.21
24.5 In.
490 622.29 | 623.56 | 624.83 | 626.10 | 627.37 | 628.64 | 629.91
500 634.99 | 636.26 | 637.53 | 638.80 | 640.07 | 641.34 | 642.61
| 510 647.69 | 648.96 | 650.23 | 651.50 | 652.77 | 654.04 | 655.31
520 660.39 | 661.66 | 662.93 | 664.20 | 665.47 | 666.74 | 668.01
| 530 673.09 | 674.36 | 675.63 | 676.90 | 678.17 | 679.44 | 680.71
Tenths.
Russian
Half-Lines.
0. 1. 2. 3 4. 3. 6.
27 Inch. Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim.
540 685.79 | 685.91 | 686.04 | 686.17 | 686.30 | 686.42 | 686.55
541 687.06 | 687.18 | 687.31 | 687.44 | 687.57 | 687.69 | 687.82
542 688.33 | 688.45 | 688.58 | 688.71 | 688.84 | 688.96 | 689.09
543 689.60 | 689.72 | 689.85 | 689.98 | 690.11 | 690.23 | 690.36
544 690.87 | 690.99 | 691.12 | 691.25 | 691.38 | 691.50 | 691.63
545 692.14 | 692.26 | 692.39 | 692.52 | 692.65 | 692.77 | 692.90
546 693.41 | 693.53 | 693.66 | 693.79 | 693.91 | 694.04 | 694.17
547 694.68 | 694.80 | 694.93 | 695.06 | 695.19 | 695.31 | 695.44
548 695.95 | 696.07 | 696.20 | 696.33 | 696.46 | 696.58 | 696.71
549 697.22 | 697.34 | 697.47 | 697.60 | 697.73 | 697.85 | 697.98
27.5 In.
550 698.49 | 698.61 | 698.74 | 698.87 | 699.00 | 699.12 | 699.25
551 699.76 | 699.88 | 700.01 | 700.14 | 700.27 | 700.39 | 700.52
552 701.03 | 701.15 | 701.28 | 701.41 | 701.54 | 701.66 | 701.79
| 553 702.30 | 702.42 | 702.55 | 702.68 | 702.81 | 702.93 | 703.06
554 703.57 | 703.69 | 703.82 | 703.95 | 704.08 | 704.20 | 704.33
555 | 704.84 | 704.96 | 705.09 | 705.22 | 705.35 | 705.47 | 705.60
556 706.11 | 706.23 | 706.36 | 706.49 | 706.62 | 706.74 | 706.87
557 707.38 | 707.50 | 707.63 | 707.76 | 707.89 | 708.01 | 708.14
558 708.65 | 708.77 | 708.90 | 709.03 | 709.16 | 709.28 | 709.41
I. 559 709.92 | 710.14 | 710.27 | 710.40 | 710.53 | 710.65 | 710.78
28 Inch.
560 711.19 | 711.31 | 711.44 | 711.57 | 711.70 | 711.82 | 711.95
561 712.46 | 712.58 | 712.71 | 712.84 | 712.97 | 713.09 | 713.22
562 713.73 | 713.85 | 713.98 | 714.11 | 714.24 | 714.36 | 714.49
563 715.00 | 715.12 | 715.25 | 715.38 | 715.51 | 715.63 | 715.76
564 716.27 | 716.39 | 716.52 | 716.65 | 716.78 | 716.90 | 717.03
565 717.54 | 717.66 | 717.79 | 717.92 | 718.04 | 718.17 | 718.30
566 718.81 | 718.93 | 719.06 | 719.19 | 719.31 | 719.44 | 719.57
567 720.08 | 720.20 | 720.33 | 720.46 | 720.58 | 720.71 | 720.84
568 721.35 | 721.47 | 721.60 | 721.73 | 721.85 | 721.98 | 722.11
569 | 722.62 | 722.74 | 722.87 | 723.00 | 723.12 | 723.25 | 723.38

Ze

Millim.
567.68
580.38
593.08
605.78
618.48

631.18
643.88
656.58
669.28
681.98

Ze
Millim.
686.68
687.95
689.22
690.49
691.76

693.03
694.30
695.57
696.84
698.11

699.38
700.65
701.92
703.19
704.46

705.73
707.00
708.27
709.54
710.81

712.08
713.35
714.62
715.89
717.16

718.43
719.70
720.97
722.24
723.51

sss — ———— a

COMPARISON OF THE RUSSIAN AND METRICAL BAROMETERS.

8.
Millim.
568.95
581.65
594.35
607.05
619.75

632.45
645.15
657.85
670.55
683.25

8.

Millim.
686.80
688.07
689.34
690.61
691.88

693.15
694.42
695.69
696.96
698.23

699.50
700.77
702.04
703.31
704.58

705.85
707.12
708.39
709.66
710.93

712.20
713.47
714.74
716.01
717.28

718.55
719.82
721.09
722.36
723.63

46

9.

Millim.
570.22
582.92
595.62
608.32
621.02

633.72
646.42
659.12
671.82
684.52

9.
Millim.
686.93
688.20
689.47
690.74
692.01

693.28
694.55
695.82
697.09
698.36

699.63
700.90
702.17
703.44
704.71 |;

705.98
707.25
708.52
709.79
711.06

712.33
713.60 !
714.87
716.14
717.41

718.68
719.95
721.22
722.49
723.76

COMPARISON OF THE RUSSIAN AND METRICAL BAROMETERS. 951
1 Russian Half-Line = 1.269977 Millimetre.

Tenths.
Russian

Half-Lines. i
0. 1. 2. Be 4. 3. 6. de 8. 9.

28.5 Inch.|} Millim. | Millim. | Millim. | Millim. | Millim. }| Millim. | Millim. | Millim. | Millim. | Millim.
570 723.89 | 724.01 | 724.14 | 724.27 | 724.39 | 724.52 | 724.65 | 724.78 | 724.90 | 725.03
571 725.16 | 725.28 | 725.41 | 725.54 | 725.66 | 725.79 | 725.92 | 726.05 | 726.17 | 726.30
572 726.43 | 726.55 | 726.68 | 726.81 | 726.93 | 727.06 | 727.19 | 727.32 | 727.44 | 727.57
573 727.70 | 727.82 | 727.95 | 728.08 | 728.20 | 728.33 | 728.46 | 728.59 | 728.71 | 728.84
574 728.97 | 729.08 | 729.21 | 729.34 | 729.46 | 729.59 | 729.73 | 729.85 | 729.97 | 730.11

575 730.24 | 730.36 | 730.49 | 730.62 | 730.74 | 730.87 | 731.00 | 731.13 | 731.25 | 731.38
576 731.51 | 731.63 | 731.76 | 731.89 | 732.01 | 732.14 | 732.27 | 732.40 | 732.52 | 732.65
577 732.78 | 732.90 | 733.03 | 733.16 | 733.28 | 733.41 | 733.54 | 733.67 | 733.79 | 733.92
578 734.05 | 734.17 | 734.30 | 734.43 | 734.55 | 734.68 | 734.81 | 734.94 | 735.06 | 735.19
579 735.32 | 735.44 | 735.57 | 735.70 | 735.82 | 735.95 | 736.08 | 736.21 | 736.33 | 736.46
29 Inck.
580 736.59 | 736.71 | 736.84 | 736.97 | 737.09 | 737.22 | 737.35 | 737.48 | 737.60 | 737.73
581 737.86 | 737.98 | 738.11 | 738.24 | 738.36 | 738.49 | 738.62 | '738.75 | 738.87 | 739.00
582 739.13 | 739.25 | 739.38 | 739.51 | 739.63 | 739.76 | 739.89 | 740.02 | 740.14 | 740.27
583 740.40 | 740.52 | 740.65 | 740.78 | 740.90 | 741.03 | 741.16 | 741.29 | 741.41 | 741.54
584 741.67 | 741.79 | 741.92 | 742.05 | 742.17 | 742.30 | 742.43 | 742.56 | 742.68 | 742.81

585 742.94 | 743.06 | 743.19 | 743.32 | 743.44 | 743.57 | 743.70 | 743.83 | 743.95 | 744.08
586 744.21 | 744.33 | 744.46 | 744.59 | 744.71 | 744.84 | 744.97 | 745.10 | 745.22 | 745.35
587 745.48 | 745.60 | 745.73 | 745.86 | 745.98 | 746.11 | 746.24 | 746.37 | 746.49 | 746.62
588 746.75 | 746.87 | 747.00 | 747.13 | 747.25 | 747.38 | 747.51 | 747.64 | 747.76 | 747.89 |
589 748.02 | 748.14 | 748.27 | 748.40 | 748.52 | 748.65 | 748.78 | 748.91 | 749.03 | 749.16
29.5 In
590 749.29 | 749.41 | 7419.54 | 719.67 | 749.79 | 749.92 | 750.05 | 750.18 | 750.30 | 750.43
591 750.56 | 750.68 | 750.81 | 750.94 | 751.06 | 751.19 | 751.32 | 751.45 | 751.57 | 751.70
592 751.83 | 751.95 | 752.08 | 752.21 | 752.33 | 752.46 | 752.59 | 752.72 | 752.84 | 752.97
593 753.10 | 753.22 | 753.35 | 753.48 | 753.60 | 753.73 | 753.86 | 753.99 | 754.11 | 754.24
594 754.37 | 754.49 | 754.62 | 754.75 | 754.87 | 755.00 | 755.13 | 755.26 | 755.38 | 755.51

595 755.64 | 755.76 | 755.89 | 756.02 | 756.14 | 756.27 | 756.40 | 756.53 | 756.65 | 756.78
596 756.91 | 757.03 | 757.16 | 757.29 | 757.41 | 757.54 | 757.67 | 757.80 | 757.92 | 758.05
597 758.18 | 758.30 | 758.43 | 758.56 | 758.68 | 758.81 | 758.94 | 759.07 | 759.19 | 759.32
598 759.45 | 759.57 | 759.70 | 759.84 | 759.96 | 760.09 | 760.21 | 760.34 | 760.46 | 760.59
599 760.72 | 760.84 | 760.97 | 761.10 | 761.22 | 761.35 | 761.48 | 761.61 | 761.73 | 761.86
30 Inch.
600 761.99 | 762.11 | 762.24 | 762.37 | 762.49 | 762.62 | '762.'75 | 762.88 | 763.00 | 763.13
601 763.26 | 763.38 | 763.51 | 763.64 | 763.76 | 763.89 | 764.02 | 764.15 | 764.27 | 764.40
602 764.53 | 764.65 | 764.78 | 764.91 | 765.03 | 765.16 | 765.29 | 765.42 | 765.54 | 765.67
603 765.80 | 765.92 | 766.05 | 766.18 | 766.30 | 766.43 | 766.56 | 766.69 | 766.81 | 766.95
604 767.07 | 767.19 | 767.32 | 767.45 | 767.57 | 767.70 | 767.83 | 767.96 | 768.08 | 768.21

605 768.34 | 768.46 | 768.59 | 768.72 | 768.84 | 768.97 | 769.10 | 769.23 | 769.35 | 769.48
606 769.61 | 769.73 | 769.85 | 769.99 | 770.11 | 770.24 | 770.37 | 770.50 | 770.62 | 770.75
607 770.88 | 771.00 | 771.13 | 771.26 | 771.38 | 771.51 | 771.64 | 771.77 | 771.89 | 772.02
608 || 772.15 | 772.27 | 772.40 | 772.53 | 772.65 | 772.78 | 772.91 | 773.03 | 773.16 | 773.29
609 i 773.42 | 773.54 | 773.67 | 773.80 | 773.92 | 774.05 | 774.18 | 774.30 | 774.43 | 774.56

Hundredths,

0.000 | 0.013 | 0.025 | 0.038 | 0.051 | 0.063 | 0.076 | 0.089 | 0.102 | on |

es

Cc 47

259, VIII. COMPARISON OF THE RUSSIAN AND 2LD FRENCH BAROMETERS.
1 Russian Half-Line = 0.562976 Paris Line.
Units or Russian Half-Lines, =
Russian = Se
| Half-Lines.
0. i. 2. 3. 4. dD. 6. Ze &. 9.
22 Inch. || Par. line. | Par. line Par. line | Par line. | Par line. Par line. | Par. line.| Par. line | Par line. | Par. line,
440 247.71 | 248.27 | 248.84 | 249.40 | 249.96 } 250.52 | 251.09 | 251.65 | 252.21 | 252.78
450 253.34 | 253.90 | 254.47 | 255.03 | 255.59 | 256.15 | 256.72 | 257.28 257.84 | 258.41
460 258.97 | 259.53 | 260.09 | 260.66 | 261.22 } 261.78 | 262.35 | 262.91 | 263.47 | 264.04
470 264.60 | 265.16 | 265.72 | 266.29 | 266.85 } 267.41 | 267.98 | 268.54 | 269.10 | 269.67
480 270.23 | 270.79 | 271.35 | 271.92 | 272.48 | 273.04 | 273.61 | 274.17 | 274.73 | 275.30
24.5 In
| 490 275.86 | 276.42 | 276.98 | 277.55 | 278.11 | 278.67 | 279.24 | 279.80 | 280.36 | 280.93
500 281.49 | 282.05.) 282.61 | 283.18 | 283.74 | 284.30 | 284.87 | 285.43 | 285.99 | 286.55
510 287.12 | 287.68 | 288.24 | 288.81 | 289.37 | 289.93 | 290.50 | 291.06 | 291.62 | 292.18
520 292.75 | 293.31 | 293.87 | 294.44 | 295.00 | 295.56 | 296.13 | 296.69 | 297.25 | 297.81
530 298.38 | 298.94 | 299.50 | 300.07 | 300.63 | 301.19 | 301.76 | 302.32 | 302.88 | 303.44
Tenths.
Russian
Halt-Lines.
| O. 1. 2. 3. 4. 3. 6. Ze 8. 9.
27 Inch. |) Par. line.| Par line. | Par. line. | Par. line. | Par. line | Par. line. | Par. line.) Par. line ‘Par, line. | Par. line.
540 304.01 | 304.06 | 304.12 | 304.18 | 304.23 | 304.29 | 304.34 | 304.40 | 304.46 | 304.51
541 304.57 | 304.63 | 304.68 | 304.74 | 304.80 | 304.85 | 304.91 | 304.96 | 305.02 | 305.08
542 305.13 | 305.19 | 305.25 | 305.30 | 305.36 | 305.41 | 305.47 | 305.53 | 305.58 | 305.64 |
543 305.70 | 305.75 | 305.81 | 305.86 | 305.92 | 305.98 | 306.03 | 306.09 | 306.15 | 306.20
544 306.26 | 306.32 | 306.37 | 306.43 | 306.48 | 306.54 | 306.60 | 306.65 | 306.71 | 306.77
545 306.82 | 306.88 | 306.93 | 306.99 | 307.05 | 307.10 | 307.16 | 307.22 | 307.27 | 307.33
546 307.38 | 307.44 | 307.50 | 307.55 | 307.61 | 307.67. | 307.72 | 307.78 | 307.84 307.89 ||
5AT 307.95 | 308.00 | 308.06 | 308.12 | 308.17 | 308.23 | 308.29 | 308.34 | 308.40 | 308.45
548 308.51 | 308.57 | 308.62 | 308.68 | 308.74 | 308.79 | 308.85 | 308.90 | 308.96 | 309.02
549 309.07 | 309.13 | 309.19 | 309.24 | 309.30 | 309.36 | 309.41 | 309.47 | 309.52 | 309.58
27.5 In
550 309.64 | 309.69 | 309.75 | 309.81 | 309.86 | 309.92 | 309.97 | 310.03 | 310.09 | 310.14
551 310.20 | 310.26 | 310.31 | 310.37 | 310.42 | 310.48 | 310.54 | 310.59 | 310.65 | 310.71
552 310.76 | 310.82 | 310.88 | 310.93 | 310.99 | 311.04 | 311.10 | 311.16 | 311.21 | 311.27
553 311.33 | 311.38 | 311.44 | 311.49 | 311.55 | 311.61 | 311.66 | 311.72 | 311.78 | 311.83
554 311.89 | 311.95 | 312.00 | 312.06 | 312.11 | 312.17 | 312.23 | 312.28 | 312.34 | 312.40
555 312.45 | 312.51 | 312.56 | 312.62 | 312.68 } 312.73 | 312.79 | 312.85 | 312.90 | 312.96
556 313.01 | 313.07 | 313.13 | 313.18 | 313.24-] 313.30 | 313.35 | 313.41 | 313.47 | 313.52
557 313.56 | 313.63 | 313.69 | 313.75 | 313.80 | 313.86 | 313.92 | 313.97 | 314.03 | 314.08 |
558 314.14 | 314.20 | 314.25 | 314.31 | 314.37 | 314.42 | 314.48 | 314.53 | 314.59 | 314.65 |
559 314.70 | 314.76 | 314.82 | 314.87 | 314.93 | 314.99 | 315.04 | 315.10 | 315.15 | 315.21 |
28 Inch |
560 315.27 | 315.32 | 315.38 | 315.44 | 315.49 | 315.55 | 315.60 | 315.66 | 315.72 | 315.77 |
561 315.83 | 315.89 | 315.94 | 316.00 | 316.05 | 316.11 | 316.17 | 316.22.) 316.28 | 316.34 |
562 316.39 | 316.45 | 316.51 | 316.56 | 316.62 | 316.67 | 316.73 | 316.79 | 316.84 | 316.90 |
563 316.96 | 317.01 | 317.07 | 317.12 | 317.18 | 317.24 | 317.29 | 317.35 | 317.41 | 317.46 | |
564 317.52 | 317.57 | 317.63 | 317.69 | 317.74 | 317.80 | 317.86 | 317.91 | 317.97 | 318.03
565 318.08 | 818.14 | 318.19 | 318.25 | 318.31 | 318.36 | 318.42 | 318.48 | 318.53 | 318.59
566 318.64 | 318.70 | 318.76 318.81 318.87 | 318.93 | 318.98 | 319.04 | 319.09 | 319.15 |
567 319.21 | 319.26 | 319.32 | 319.38 | 319.43 | 319.49 | 319.55 | 319.60 | 319.66 | 319.71
568 319.77 | 319.83 | 319.88 | 319.94 | 320.00 | 320.05 | 320.11 | 320.16 | 320.22 | 320.28
569 320.33 | 320.39 | 320.45 | 320.50 | 320.56 | 320.61 | 320.67 | 320.73 | 320.78 | 320.84 :
is ee
C 48

=

COMPARISON OF THE RUSSIAN AND OLD FRENCH BAROMETERS. 253

1 Russian Half-Line = 0.562976 Paris Line.

Tenths. }

Russian
Half-Lines.

0. 1. ey be 4. de. 6. ‘de 8. 9.

28.5 Inch. || Par. line. | Par. line. | Par. line.| Par. line.| Par. line. | Par. line. | Par. line.| Par. line. | Par. line. | Par. line.
570 320.90 | 320.95 | 321.01 | 321.07 | 321.12 | 321.18 | 321.23 | 321.29 | 321.35 | 321.40
571 321.46 | 321.52 | 321.57 | 321.63 | 321.68 | 321.74 | 321.80 | 321.85 | 321.91 | 321.97
572 322.02 | 322.08 | 322.13 | 322.19 | 322.25 | 322.30 | 322.36 | 322.42 | 322.47 | 322.53
573 322.59 | 322.64 | 322.70 | 322.75 | 322.81 | 322.87 | 322.92 | 322.98 | 323.04 | 323.09
574 323.15 | 323.20 | 323.26 | 323.32 | 323.37 | 323.43 | 323.49 | 323.54 | 323.60 | 323.65

575 323.71 | 323.77 | 323.82 | 323.88 | 323.94 | 323.99 | 324.05 | 324.11 | 324.16 | 324.22
576 324.27 | 324.33 | 324.39 | 324.44 | 324.50 | 324.56 | 324.61 | 324.67 | 324.72 | 324.78
577 324.84 | 324.89 | 324.95 | 325.01 | 325.06 | 325.12 | 325.17 | 325.23 | 325.29 | 325.34
578 325.40 | 325.46 | 325.51 | 325.57 | 325.63 | 325.68 | 325.74 | 325.79 | 325.85 | 325.91
579 325.96 | 326.02 | 326.08 | 326.13 | 326.19 | 326.24 | 326.30 | 326.36 | 526.41 | 326.47
29 Inch.

480 326.53 | 326.58 | 326.64 | 326.69 | 326.75 | 326.81 | 326.86 | 326.92 | 326.98 | 327.03
581 327.09 | 327.15 | 327.20 | 327.26 | 327.31 | 327.37 | 327.43 | 327.48 | 327.54 | 327.60
582 327.65 | 327.71 | 327.76 | 327.82 | 327.88 | 327.93 | 327.99 | 328.05 | 328.10 | 328.16

583 328.22 | 328.27 | 328.33 | 328.38 | 328.44 | 328.50 | 328.55 | 328.61 | 328.67 | 328.72
584 328.78 | 328.83 | 328.89 | 328.95 | 329.00 | 329.06 | 329.12 | 329.17 | 329.23 | 329.28

585 329.34 | 329.40 | 329.45 | 329.51 | 329.57 | 329.62 | 329.68 | 329.74 | 329.79 | 329.85
586 329.90 | 329.96 | 330.02 | 330.07 | 330.13 | 330.19 | 330.24 | 330.30 | 330.35 | 330.41
587 330.47 | 330.52 | 330.58 | 330.64 | 330.69 | 330.75 | 330.80 | 330.86 | 330.92 | 330.97
588 331.03 | 331.09 | 331.14 | 331.20 | 331.26 | 331.31 | 331.37 | 331.42 | 331.48 | 331.54
589 331.59 | 331.65 | 331.71 | 331.76 | 331.82 | 331.87 | 331.93 | 331.99 | 332.04 | 332.10
29.5 In
590 332.16 | 332.21 | 332.27 | 332.32 | 332.38 | 332.44 , 332.49 | 332.55 | 332.61 | 332.66
591 332.72 | 332.78 | 332.83 | 332.89 | 332.94 | 333.00 | 333.06 | 333.11 | 333.17 | 333.23
592 333.28 | 333.34 | 333.39 | 333.45 | 333.51 | 333.56 | 333.62 | 333.68 | 333.73 | 333.79
593 333.84 | 333.90 | 333.96 | 334.01 | 334.07 | 334.13 | 334.18 | 334.24 | 354.30 | 334.35
594 334.41 | 334.46 | 334.52 | 334.58 | 334.63 | 334.69 | 334.75 | 334.80 | 334.86 | 334.91

595 334.97 | 335.03 | 335.08 | 335.14 | 335.20 | 335.25 | 335.31 | 335.36 | 335.42 | 335.48
596 335.53 | 335.59 | 335.65 | 335.70 | 335.76 | 335.82 | 335.87 | 335.93 | 335.98 | 336.04
597 336.10 | 336.15 | 336.21 | 336.27 | 336.32 | 336.38 | 336.43 | 336.49 | 336.55 | 336.60
598 336.66 | 336.72 | 336.77 | 336.83 | 336.88 | 336.94 | 337.00 | 337.05 | 337.11 | 337.17

| 599 $37.22 | 337.28 | 337.34 | 337.39 | 337.45 | 337.50 | 337.56 | 337.62 | 337.67 | 337.73
30 Inch.
600 337.79 | 337.84 | 337.90 | 337.95 | 338.01 | 338.07 | 338.12 | 338.18 | 338.24 | 338.29
601 338.35 | 338.40 | 338.46 | 338.52 | 338.57 | 338.63 | 338.69 | 338.74 | 338.80 | 338.86
602 338.91 | 338.97 | 339.02 | 339.08 | 339.14 | 339.19 | 339.25 | 339.31 | 339.36 | 339.42
603 339.47 | 339.53 | 339.59 | 339.64 | 339.70 | 339.76 | 339.81 | 339.87 | 339.92 | 339.98
604 340.04 | 340.09 | 340.15 | 340.21 | 340.26 | 340.32 | 340.38 | 340.43 | 310.49 | 340.54

605 340.60 | 340.66 | 340.71 | 340.77 | 340.83 | 340.88 | 340.94 | 340.99 | 341.05 | 341.11
606 341.16 | 341.22 | 341.28 | 341.33 | 341.39 | 341.44 | 341.50 | 341.56 | 341.61 | 341.67
|
|
EE EE eee

607 341.73 | 341.78 | 341.84 | 341.90 | 341.95 | 342.01 | 342.06 | 342.12 | 312.18 | 342.23
608 342.29 | 342.35 | 342.40 | 342.46 | 342.51 | 342.57 | 342.63 | 342.68 | 312.74 | 3142.80
609 342.85 | 342.91 | 342.96 | 343.02 | 343.08 | 343.13 | 343.19 | 343.25 | 343.30 | 343.36

Hundredths.

0.028 | 0.034 | 0.039 | 0.045 | 0.051

0.000 | 0.006 | 0.011 | 0.017 | 0.022

Cc 49

we

258

IX.-XVI.

COMPARISON

OF

BAROMETRICAL DIFFERENCES

EXPRESSED IN MEASURES OF DIFFERENT SCALES,

OR

TABLES

FOR CONVERTING ENGLISF/ INCHES, MILLIMETRES, PARIS LINES, AND RUSSIAN
HALF-LINES INTO EACH OTHER.

7 yee: (nn Lee ee OR a eee ee ere
(gh : we ay
Fe ay
4 =
as y . f is
~ y * “ #
mig ty
; 4 4 Ae e
v2 \
‘
a) :
_ - 7 ‘ re
. . fee ale
. as + A * s
r "
*3 Lor ‘ fk red ing 227k
Tiaa
mS
rH,
«

IX. CONVERSION OF ENGLISH INCHES INTO MILLIMETRES, 257.

1 English Inch = 25.89954 Millimetres.

Hundredths of an Inch.

English
Inches and
Tenths.

Millim. | Millim. | Millim. | Millim. | Millim. Millim. | Millim. | Millim. | Millim. | Millim.
0.0 0.000 | 0.254 0.508 0 762 1.016 1.270 1.524 1.778 2.032 2.286
0.1 2.540 | 2.794) 3.048 3.302 3.556 3.810 | 4.064 4.318 4.572 4.826
0.2 5.080 | 5.334] 5.588) 5.8412| 6.096 6.350 | 6.604 | 6.858 | 7.112] 7.366
0.3 7.620 | 7.874] 8.128] 8.382) 8.636 8.890 | 9.144] 9.3898] 9.652] 9.906
0.4 10.160 | 10.414 | 10.668 | 10.922 | 11.176 | 11.430 | 11.684 | 11.938 | 12.192 | 12.446
0.5 12.700 | 12.954 | 13.208 | 13.462 | 13.716 | 13.970 | 14.224 | 14.478 | 14.732 | 14.986
0.6 15.240 | 15.494 | 15.748 | 16.002 | 16.256 | 16.510 | 16.764 | 17.018 | 17.272 | 17.526
0.7 17.780 | 18.034 | 18.288 | 18.542 | 18.796 | 19.050 | 19.304 | 19.558 | 19.812 | 20.066
0.8 20.320 | 20.574 | 20.828 | 21.082 | 21.336 | 21.590 | 21.844 | 22.098 | 22.352 | 22.606
0.9 22.860 | 23.114 | 23.368 | 23.622 | 23.876 | 24.130 |. 24.384 | 24.638 | 24.892 | 25.146
1.0 25.400 | 25.654 | 25.908 | 26.162 | 26.416 | 26.670 | 26.924 | 27.178 | 27.432 | 27.685
1.1 27.939 | 28.193 | 28.447 | 28.701 | 28.955 | 29.209 | 29.463 | 29.717 | 29.971 | 30.225
lap. 30.479 | 30.733 | 30.987 | 31.241 | 31.495 | 31.749 | 32.003 | 32.257 | 32.511 | 32.765

33.019 | 33.273 | 33.527 | 33.781 | 34.035 | 34.289 | 34.543 | 34.797 | 35.051 | 35.305
1.4 35.559 | 35.813 | 36.067 | 36.321 | 36.575 | 36.829 | 37.083 | 37.337 | 37.591 | 37.845
1.5 38.099 | 38.353 | 38.607 | 38.861 | 39.115 |} 39.369 | 39.623 | 39.877 | 40.131 | 40.385
1.6 40.639 | 40.893 | 41.147 | 41.401 | 41.655 | 41.909 | 42.163 | 42.417 | 42.671 | 42.925
ed, 43.179 | 43.433 | 43.687 | 43.941 | 44.195 | 44.449 | 44.703 | 44.957 | 45.211 | 45.465
1.8 | 45.719 | 45.973 | 46.227 | 46.481 | 46.735 | 46.989 | 47.243 | 47.497 | 47.751 | 48.005

X. CONVERSION OF ENGLISH INCHES INTO FRENCH OR PARIS LINES.
1 English Inch = 11.259515 Paris Lines.

Hundredths of an Inch.
Rn cui s hy yee eee ee ee es eee eee

Inches and||"
Tenths. 0. 1. 2. 3. 4. 3d. 6. 7 8. 9.

Par. line. | Par. line.| Par. line. /Par. line.| Par. line. | Par. line.| Par. line.| Par. line.| Par. line.| Par. line.
0.0 0.000 | 0.113 | 0.225} 0.338 | 0.450 0.563 | 0.676| 0.788 | 0.901 1.013
0.1 1.126 1.239} 1.351 1.464 1.576 1.689 1.802 1.914 | 2.027] 2.139
0.2 2.252 | 2.364] 2.477 | 2.590; 2.702 2.815 | 2.927) 3.010} 3.153} 3.265
0.3 3.378 | 3.490] 3.603] 3.716] 3.828 3.941 4.053 | 4.166] 4.279] 4.391
0.4 4.504 | 4.616] 4.729] 4.842] 4.954 5.067 | 5.179| 5.292} 5.405] 5.517

0.5 5.630 | 5.742] 5.855) 5.968} 6.080] 6.193] 6.305] 6.418| 6.531] 6.645

0.6 6.756 | 6.868 | 6.981} 7.093 | 7.206 7.319 | 7.431) 7.544) 7.656) 7.769
0.7 7.882 | 7.994] 8.107} 8.219| 8.332 | 8.445] 8.557] 8.670} 8.782) 8.895
0.8 9.008 | 9.120] 9.233] 9.345) 9.458 9.571} 9.683} 9.796} 9.908 | 10.021
0.9 10.134 | 10.246 | 10.359 | 10.471 | 10.584 | 10.697 | 10.809 | 10.922 | 11.034 | 11.147

1.0 11.260 | 11.372 | 11.485 | 11.597 | 11.710 | 11.822 | 11.935 | 12.048 | 12.160 | 12.273
1.1 12.385 | 12.498 | 12.611 | 12.723 | 12.836 | 12.945 | 13.061 | 13.174 | 13.286 | 13.399
1.2 13.511 | 13.624 | 13.737 | 13.849 | 13.962 | 14.074 | 14.187 | 14.300 | 14.412 | 14.525
1.3
1.4
1.5
1.6
1.7
1.8

14.637 | 14.750 | 14.863 | 14.975 | 15.088 | 15.200 | 15.313 | 15.426 | 15.538 ee
15.763 | 15.876 | 15.988 | 16.101 | 16.214 | 16.326 | 16.439 | 16.551 | 16.664 na
|
|

16.889 | 17.002 | 17.114 | 17.227 | 17.340 | 17.452 | 17.565 | 17.677 | 17.790 | 17.903 |
18.015 | 18.128 | 18.240 | 18.353 | 18.466 | 18.578 | 18.691 | 18.803 | 18.916 | 19.029
19.141 | 19.254 | 19.366 | 19.479 | 19.592 | 19.704 | 19.817 | 19.929 | 20.042 | 20.155
20.267 | 20.380 | 20.492 | 20.605 | 20.717 | 20.830 | 20.943 | 21.055 | 21.168 | 21.280 ||
————— ————}

XI. CONVERSION OF

1 Metre = 39.37079 English Inches

MILLIMETRES {NTO ENGLISH INCHES.

0.

Eng. In.
0.0000 |

0.0394
0.0787
0.1181
0.1575

0.1969
0.2362
0.2756
0.3150
0.3543

0.3937
0.4331
0.4724
0.5118
0.5512

0.5906
0.6299
0.6693
0.7087
0.7480

0.7874
0.8268
0.8662
0.9055
0.9449

0.9843
1.0236
1.0630
1.1024
1.1418

-1811
-2205
-2599
-2992
3386

met emf

1.3780
1.4173
1.4567
1.4961
1.5355
1.5748

0.

1.

0.0039
0.0433
0.0827
0.1220
0.1614

0.2008
0.2402
0.2795
0.3189
0.3583

0.3976
0.4370
0.4764
0.5158
0.5551

0.5945
0.6339
0.6732
0.7126
0.7520

0.7914
0.8307
0.8701
0.9095
0.91488

0.9882
1.0276
1.0669
1.1063
1.1457

1.1851
1.2244
1.2638
1.3032
1.3425

-3819
A218
4607
5000
5394
-5788

ee a ee ee)

1.

| Eng. In.

2.

Eng. In.

0.0079
0.0472
0.0866
0.1260
0.1654

0.2047
0.2441
0.2835
0.3228
0.3622

0.4016
0.4410
0.4803
0.5197
0.5591

0.5984
0.6378
0.6772
0.7165
0.7559

0.7953
0.8347
0.8740
0.9134
0.9528

0.9921
1.0315
1.0709
1.1103
1.1496

-1890
2284
-2677
3071
-3465

emt pdm fe pe

-3859
4252
4646
-5040
-5433
-0827

met cmd hf pd

Tenths of a Millimetre.

3.

Eng. In.

0.0512
0.0906
0.1299
0.1693

0.2087
0.2480
0.2874
0.3268
0.3661

0.4055
0.4449
0.4843
0.5236
0.5630

0.6024
0.6417
0.6811
0.7205
0.7599

0.7992
0.8386
0.8780
0.9173
0.9567

0.9961
1.0355
1.0748
1.1142
1.1536

1.1929
1.2323
1.2717
1.3110
1.3504

1.3898
1.4292
1.4685
1.5079
1.5473
1.5866

0.0118 |

Eng. In. |

0.0197
0.0591
0.0984
0.1378
0.1772

0.2165
0.2559
0.2953
0.3347
0.3740

0.4134
0.4528
0.4921
0.5315
0.5709

0.6102
0.6496
0.6890
0.7284
0.7677

0.8071
0.84165
0.8858
0.9252
0.9646

1.0040
1.0433
1.0827
1.1221
1.1614

-2008
2402
-2796
-3189
3583

ee ee
° .

6. Ze

Eng. In. | Eng. In.

0.0236 | 0.0276
0.0630 | 0.0669
0.1024 | 0.1063
0.1417 | 0.1457
0.1811 | 0.1850

0.2205 | 0.2244
0.2598 | 0.2638
0.2992 | 0.3032

0.3386 | 0.3425
0.3780 | 0.3819

0.4173 | 0.4213
0.4567 | 0.4606
0.4961 | 0.5000
0.5354 | 0.5394
0.5748 | 0.5788

0.6142 | 0.6181
0.6536 | 0.6575
0.6929 | 0.6969
0.7323 | 0.7362
0.7717 | 0.7756

0.8110 | 0.8150
0.8504 | 0.8543
0.8898 | 0.8937
0.9292 | 0.9331
0.9685 | 0.9725

1.0079 | 1.0118
1.0473 | 1.0512
1.0866 | 1.0906
1.1260 | 1.1299
1.1654 | 1.1695

1.2047 | 1.2087
1.2441 | 1.2481
1.2835 | 1.2874
1.3229 | 1.3268
1.3622 | 1.3662

1.4016 | 1.4055
1.4410 | 1.4449
1.4803 | 1.4843
1.5197 | 1.5236
1.5591 | 1.5630
1.5985 | 1.6024

6. de

Eng. In.
0.0315
0.0709
0.1102
0.1496
0.1890

0.2283
0.2677
0.3071
0.3465
0.3858

0.4252
0.4646
0.5039
0.5433
0.5827

0.6221
0.6614
0.7008
0.7402
0.7795

0.8189
0.8583
0.8977
0.9370
0.9764

1.0158
1.0551
1.0945
1.1339
1.1732

1.2126
1.2520
1.2914
1.3307
1.3701

1.4095
1.4488
1.4882
1.5276
1.5670
| 1.6063

1.4922
1.5315
1.5709
1.6103

Xil.

1 Millimetre = 0.448296 Paris Line.

CONVERSION OF MILLIMETRES INTO FRENCH OR PARIS LINES.

259

Millime-
tres.

0.

Par. line.
0.000
0.443
0.887
1.330
1.773

2.216
2.660
3.103
3.546
3.990

4.433
4.876
5.320
5.763
6.206

6.649
7.093
7.536
7.979
8.423

8.866
9.309
9.753
10.196
10.639

11.082
11.526
11.969
12.412
12.856

13.299
13.742
14.185
14.629
15.072

15.515
15.959
16.402
16.845
17.289
17.732

0.

1. ae
Par. line. | Par. line.
0.044 | 0.089
0.488 | 0.532
0.931 | 0.975
1.374] 1.419
1.818 | 1.862
2.261 | 2.305
2.704 | 2.748
3.147 | 3.192
3.591 | 3.635
4.034 | 4.078
4.477 | 4,522
4.921 | 4.965
5.364 | 5.408
5.807 | 5.851
6.250 | 6.295
6.694 | 6.738
7.137 | 7.181
7.580 | 7.625
8.024 | 8.068
8.467 | 8.511
8.910 | 8.955
9.354 | 9.398
9.797 | 9.841
10.240 | 10.284
10.683 | 10.728
11.127 | 11.171
11.570 | 11.614
12.013 | 12.058
12.457 | 12.501
12.900 | 12.944
13.343 | 13.388
13.786 | 13.831
14.230 | 14.274
14.673 | 14.717
15.116 | 15.161
15.560 | 15.604
16.003 | 16.047
16.446 | 16.491
16.890 | 16.934
17.333 | 17.377
17.776 | 17.820
1. ze

Tenths of a Millimetre.

Be 4. dD.
Par. line.| Par. line. | Par. line.
ONS 2 O77 0.222
0.576 | 0.621 0.665
1.020 | 1.064 1.108
1.463 1.507 1.552
1.906 | 1.950 1.995
2.349 | 2.394 2.438
2.793 | 2.837 2.881
3.236 | 3.280 3.325
3.679 | 3.724 3.768
4.123 | 4.167 4.211
4.566 | 4.610 4.655
5.009 | 5.054 5.098
5.453 | 5.497 Db DAll
5.896 | 5.940 5.984
6.339 | 6.383 6.428
6.782 | 6.827 6.871
7.226 | 7.270 7.314
7.669 | 7.713 7.758
8.112 | 8.157 8.201
8.556 | 8.600 8.644
8.999 | 9.043 9.088
9.442 | 9.487 9.531
9.886 | 9.930] 9.974 |
10.329 | 10.373 | 10.417
10.772 | 10.816 | 10.861
11.215 | 11.260 | 11.304
11.659 | 11.703 | 11.747
12.102 | 12.146 | 12.191
12.545 | 12.590 | 12.634
12.989 | 13.033 | 13.077
13.432 | 13.476 | 13.521
13.875 | 13.919 | 13.964
14.318 | 14.363 | 14.407
14.762 | 14.806 | 14.850
15.205 | 15.249 | 15.294
15.648 | 15.693 | 15.737
16.092 | 16.136 | 16.180
16.535 | 16.579 | 16.624
16.978 | 17.023 | 17.067
17.422 | 17.466 | 17.510
17.865 | 17.909 | 17.953
Be 4. 5.

6.

Par. line.
0.266
0.709
1.153
1.596
2.039

2.482
2.926
3.369
3.812
4.256

4.699
5.142
5.586
6.029

| Par. line.

6.472

6.915
7.359
7.802
8.245
8.689

9.132
9.575
10.018
10.462
10.905

11.348
11.792
12.235
12.678
13.122

13.565
14.008
14.451
14.895
15.338

15.781
16.225
16.668
17.111
17.555
17.998

6.

7%

0.310
0.754
1.197
1.640
2.083

2.527
2.970
3.413
3.857
4.300

4.743
5.187
5.630
6.073
6.516

6.960
7.403
7.846
8.290
8.733

9.176
9.620
10.063
10.506
10.949

11.393
11.836
12.279
12.723
13.166

13.609
14.052
14.496
14.939
15.382

15.826
16.269
16.712
17.156
17.599
18.042

Ze

8.

Par. line
0.355
0.798
1.241
1.685
2.128

2.571
3.014
3.458
3.901
4.344

4.788
5.231
5.674
6.117
6.561

7.004
TAAT
7.891
8.334
8.777

9.221
9.664
10.107
10.550
10.994

11.437
11.880
12.324
12.767
13.210

13.654
14.097
14.540
14.983
15.427

15.870
16.313
16.757
17.200
17.643
18.086

8.

9.

Par. line.
0.399
0.842 |
1.286
1.729
2.172

2.615
3.059
3.502
3.945
4.389

4.832
5.275
5.719
6.162
6.605

7.018
7.492
7.935
8.378
8.822

9.265
9.708
10.151
10.595
11.038

11.481
11.925
12.368
12.811
13.255

13.698
14.141
14.584
15.028
15.471

15.914
16.358
16.801
17.244
17.688
18.131

9.

a!

960 XIII. CONVERSION OF THE FRENCH OR PARIS LINES INTO MILLIMETRES.

1 Paris Line = 2.255829 Millimetres.

| Paris
Lines.

0. 1. 2.

Millim. | Millim. | Millim.

0 0.000 | 0.226} 0.451
1 2.256 | 2.481] 2.707
2 4.512 | 4.737] 4.963
3 6.767 | 6.993 | -7.219
4 9.023 | 9.249] 9.474
5 11.279 | 11.505 | 11.730
6 13.535 | 13.761 | 13.98€
a 15.791 | 16.016 | 16.242
8 18.047 | 18.272 | 18.498
9 20.302 | 20.528 | 20.754
10 22.558 | 22.784 | 23.009
li 24.814 | 25.040 | 25.265
12 27.070 | 27.296 | 27.521
13 29.326 | 29.551 | 29.777
14 31.582 | 31.807 | 32.033
15 33.837 | 34.063 | 34.289
16 36.093 | 36.319 | 36.544
17 38.349 | 38.575 | 38.800
18 40.605 | 40.831 | 41.056

Paris
Lines.

De

Millim.
0.677
2.933
5.188
7.444
9.700

11.956

14.212
16.468
18.723
20.979
23.235
25.491

21a’
30.003
32.258
34.514
36.770
39.026
41.282

4.

Millim.
0.902
3.158
5.414
7.670
9.926

12.181

14.437
16.693
18.949
21.205
23.461
25.716

27.972
30.228
32.485
34.740
36.996
39.251
41.507

dD.

Millim.
1.128
3.384
5.640
7.895

10.151

12.407

14.663
16.919
19.175
21.430
23.686
25.942

28.198
30.454
32.711
34.965
37.221
39.477

41.733 |

6.
Millim.
1.353
3.609
5.865
8.121
10.377
12.633

14.888
17.144
19.400
21.656
23.912
26.168

28.423
30.679
32.936
35.191
37.447
39.703
41.958

XIV. CONVERSION

0.

Eng. In.
0.0000
0.0888
0.1776
0.2664
0.3553
0.4441

0.5329
0.6217
0.7105
0.7993
0.8881
0.9770

1.0658
1.1546
1.2434
1.3322
1.4210
1.5098
1.5987

1.

1 Paris Line = 0.088814 English Inch.

7
Millim.
1.579
3.835
6.091
8.347
10.602
12.858

15.114
17.370
19.626
21.882
24.137
26.393

28.649
30.905
33.162
35.417
37.672
39.928
42.184

OF FRENCH OR PARIS LINES INTO ENGLISH INCHES.

2.

Eng. In. | Eng. In.
0.0089 | 0.0178
0.0977 | 0.1066
0.1865 | 0.1954

0.2753
0.3641
0.4530

0.5418
0.6306
0.7194
0.8082
0.8970
0.9858

1.0746
1.1635
1.2523
1.3411
1.4299
1.5187
1.6075

0.2842
0.3730
0.4618

0.5506
0.6395
0.7283
0.8171
0.9059
0.9947

1.0835
1.1723
1.2612
1.3500
1.4388
1.5276
1.6164

Tenths of a Line.

8.

Millim.
1.805
4.060
6.316
8.572

10.828

13.084

15.340
17.595
19.851
22.107
24.363
26.619

28.875
31.130
33.387
35.642
37.898
40.154
42.410

—=5

Tenths of a Line. }

9.
Millim.
2.030
4.286
6.542
8.798
11.054
13.309

15.565 |

17.821 +
20.077
22.333
24.589
26.844

29.100
31.356

3.

Eng. In.
0.0266
0.1155
0.2043
0.2931
0.3819
0.4707

0.5595
0.6483
0.7372
0.8260
0.9148
1.0036

1.0924
1.1812
1.2700
1.3589

1.4477
1.5365
1.6253

4.

Eng. In
0.0355
0.1243
0.2132
0.3020
0.3908
0.4796

0.5684
0.6572
0.7460
0.8349
0.9237
1.0125

1.1013
1.1901
1.2789
1.5677
1.4565
1.5454
1.6342

56

3.

6.

Eng. In. | Eng. In.

0.0444
0.1332
0.2220
0.3108
0.3997
0.4885

0.5773
0.6661
0.7549
0.8437
0.9325
1.0214

1.1102
1.1990
1.2878
1.3766
1.4654
1.5542
1.6431

0.0533
0.1421
0.2309
0.3197
0.4085
0.4974

0.5862
0.6750
0.7638
0.8526
0.9414
1.0302

1.1191
1.2079
1.2967
1.3855
1.4743
1.5631
1.6519

ZT

Eng. In.
0.0622
0.1510
0.2398
0.3286
0.4174
0.5062

0.5951
0.6839
0.7727
0.8615
0.9503
1.0391

1.1279
1.2168
1.3056
1.3944
1.4832
1.5720
1.6608

9.

Eng. In.
0.0799
0.1687
0.2576
0.3464
0.4352
0.5240

0.6128
0.7016
0.7904
0.8793
0.9681
1.0569

1.5898

AERP OPO OH peer

OE re a etl ati Da BN thew dns

XV. CONVERSION OF RUSSIAN HALF-LINES INTO MILLIMETRES. 261

1 Russian Half-Line = 1.269977 Millimetres.

a

Russian
Half-Lines.

0. 1. 2s 3. 4. 3. 6. 7%. 8. 9.

Millim. | Millim. | Millim. | Millim. | Millim. Millim. | Millim. | Millim. | Millim. | Millim.

0 0.000} 0.127} 0.254} 0.381); 9.508 0.635 | 0.762} 0.889] 1.016} 1.14%
1 1.270 | 1.397] 1.524| 1.651] ..778 1.905 | 2.032 | 2.159] 2.286] 2.413
2 2.540 | 2.667) 2.794| 2.921 | 3.048 3.175 | 3.302 | 3.429] 3.556] 3.683
3 3.810 | 3.937] 4.064) 4.191] 4.318 4.445 | 4.572 | 4.699| 4.826] 4.953

4 5.080 | 5.207} 5.334] 5.461] 5.588 5.715 | 5.842] 5.969] 6.096] 6.223
5 6.350 | 6.477} 6.604| 6.731 | 6.858 | 6.985 | 7.112 | 7.239] 7.366] 7.493

6 7.620 | 7.747} 7.874] 8.001} 8.128 | 8.255] 8.382] 8.509] 8.636] 8.763
7 8.890 |} 9.017} 9.144} 9.271] 9.398 9.525 | 9.652} 9.779 | 9.906 | 10.033
8 10.160 | 10.287 | 10.414 | 10.541 | 10.668 | 10.795 | 10.922 | 11.049 | 11.176 | 11.303
9 11.430 | 11.557 | 11.684 | 11.811 | 11.938 } 12.065 | 12.192 | 12.319 | 12.446 | 12.573
10 12.700 | 12.827 | 12.954 | 13.081 | 13.208 | 13.335 | 13.462 | 13.589 | 13.716 | 13.843
11 13.970 | 14.097 | 14.224 | 14.351 | 14.478 | 14.605 | 14.732 | 14.859 | 14.986 | 15.113

12 15.240 | 15.367 | 15.494 | 15.621 | 15.748 | 15.875 | 16.002 | 16.129 | 16.256 | 16.383
13 16.510 | 16.637 | 16.764 | 16.891 | 17.018 | 17.145 | 17.272 | 17.399 | 17.526 | 17.653
14 17.780 | 17.907 | 18.034 | 18.161 | 18.288 | 18.415 | 18.542 | 18.669 | 18.796 | 18.923
15 19.050 | 19.177 | 19.304 | 19.431 | 19.558 | 19.685 | 19.812 | 19.939 | 20.066 | 20.193
20.320 | 20.447 | 20.574 | 20.701 | 20.828 | 20.955 | 21.082 | 21.209 | 21.336 | 21.463
| 21.590 | 21.717 | 21.844 | 21.971 | 22.098 | 22.225 | 22.352 | 22.479 | 22.606 | 22.733

22.860 | 22.987 | 23.114 | 23.241 | 23.368 | 23.495 | 23.622 | 23.749 | 23.876 | 24.003

2 a pe ee aes Deere mene

CONVERSION OF RUSSIAN HALF-LINES INTO PARIS LINES.

1 Russian Half-Line = 0.562976 Paris Line.
a
Tenths.

XVI.

Russian eee ———————— oe
Half-Lines. 0. 1. 2, Be 4. de 6. 4 8, 9.

Par. line | Par. line.| Par. line. |Par. line. | Par. line. | Par. line.| Par. line.| Par. line.| Par. line. | Par. line.

0 0.000 | 0.056} 0.113 | 0.169] 0.225 0.281 | 0.338] 0.394} 0.450} 0.507
1 0.563 | 0.619| 0.676) 0.732] 0.788 0.844] 0.901] 0.957} 1.013} 1.070
2 1.126 | 1.182] 1.239] 1.295] 1.351 1.407 | 1.464] 1.520] 1.576) 1.633
3 1.689 | 1.745] 1.802] 1.858} 1.914 1.970} 2.027] 2.083] 2.139] 2.196
4 2.252 | 2.308] 2.364] 2.421] 2.477 2.533 | 2.590} 2.646 | 2.702 | 2.759
5 2.815 | 2.871] 2.927] 2.984] 3.040 3.096 | 3.153} 3.209) 3.265 | 3.322
6 3.378 | 3.434] 3.490] 3.547) 3.603 3.659 | 3.716 | 3.772 | 3.828 | 3.885
a 3.941 | 3.997} 4.053] 4.110] 4.166 4.222 | 4.279| 4.335 |) 4.391) 4.448
8 4.504] 4.560) 4.616] 4.673) 4.729 4.785 | 4.842] 4.898 | 4.954] 5.010
9 5.067 | 5.123] 5.179} 5.236] 5.292 |] 5.348) 5.405) 5.461] 5.517] 5.573
10 5.630 | 5.686] 5.742 | 5.799) 5.855 5.911 | 5.968| 6.024) 6.080) 6.136
il 6.193 | 6.249 | 6.305] 6.362] 6.418 | 6.474] 6.531| 6.587] 6.643] 6.699
12 6.756 | 6.812] 6.868 | 6.925] 6.981 7.037 | 7-093] 7-150] 7.206 | 7.262
13 7.319 | 7.375 | 7.431] 7.488| 7.544] 7-600] 7.656] 7.713 | 7.769 | 7.825
14 7.882 | 7.938] 7.994) 8.051] 8.107 | 8.163] 8.219| 8.276] 8.332] 8.388
15 8.445 | 8.501 | 8.557] 8.614] 8.670 | 8.726] 8.782] 8.839] 8.895] 8.951
16 9.008 | 9.064] 9.120] 9.177] 9.233 | 9.289] 9.345] 9.402 | 9.458} 9.514
17 9.571 | 9.627| 9.683 | 9.739] 9.796 | 9.852] 9.908} 9.965 | 10.021 | 10.077
18 10.134 | 10.190 | 10.246 | 10.302 | 20.359 | 10.415 | 10.471 | 10.528 | 10.584 | 10.640

wy Leow : ‘ 2 i ‘ 2
fey t 7)
f
; a ; i
¥ t i =— » i 1
\ , wf nt
1 4
: ” 5 cae * ba, se { 7
tg Siz Vie ~ ‘
i
- | = ,
Sains ae eae a ‘ es s « * i
\3 ‘
4 2 2 =
' J i y é 1 i af
¢ . : aa i
ay 5 : a t ' igs 4 '
; , ’
t + o i 4 ‘
iW r oe i F } i
t '
: ‘ H :
i eae aq t
ei SE AEA j j i ‘ A i ;
Bi

263

TA Bo ES

REDUCING BAROMETRICAL OBSERVATIONS,

TAKEN AT ANY TEMPERATURE,

TO THE TEMPERATURE OF THE FREEZING POINT.

59

‘ . i , a ee “ly
PU a tne ae
,
!
\
= é
‘ i 4
an
; Te

265

TABLES

FOR

REDUCING THE BAROMETRICAL OBSERVATIONS TAKEN AT ANY TEMPERATURE TO THE
TEMPERATURE OF THE FREEZING POINT.

THE variations of the mercurial column in a stationary barometer are due to two
causes, the changes of atmospheric pressure and the variations of temperature of the
mercury, which affect the length of the column by changing its density. The varia-
tions of atmospheric pressure, which alone the barometer is destined to ascertain, are
therefore hidden, and their observation falsified by the expansion or contraction of the
mercury due to changes of temperature. For, supposing that, while the atmospheric
pressure remains the same, the temperature of the instrument becomes lower, the
mercurial column wi.! become shorter, and the barometer will appear to fall; if the
pressure becomes less, but the temperature increases, the expansion of the mercury
will tend to compensate the diminution of pressure, and the barometer may remain
stationary, or even may rise, while it ought to be falling; in other cases the action
of temperature will tend to increase the amount of the changes of the barometrical
height. It is therefore evident that successive observations, with the same barumeter,
do not give directly the actual changes of atmospheric pressure, unless they have
been taken exactly at the same temperature, a case which, in practice, seldom occurs.
Likewise simultaneous observations, taken with various barometers, do not g:ve
directly the actual differences of the absolute pressure of the atmosphere above the
instruments. To obtain the true barometrical heights, that is, the action of the at-
mospheric pressure alone, the influence of the temperature must first be eliminated
from the observed heights. This is done by reducing, by means of the following
Tables, the various barometrical columns to the length they would have at a given
temperature, which is the same for all. For the sake of convenient comparison,
the freezing point has been almost universally adopted as the standard temperature
to which all observations are to be reduced.

CoNSTRUCTION OF THE TABLES.

In all the following Tables the barometers are supposed to be furnished with brass
scales, extending from the surface of the mercury in the cistern to the top of the
mercurial column. The correction to be applied is therefore composed of two ele-
ments: the correction for the expansion of the mercury, and that for the expansion
of the scale ; both of which ought to be, and have been, taken into account.

Indeed, the correction for the expansion of mercury is not sufficient to reduce the
readings to the height which the barometer would indicate, under the same pressure,
at the temperature of the freezing point. For when the temperature rises the mer
curial column expands ; but then the scale also grows longer, and this will tend to
lower the reading of the height. The correction for the expansion of the mercury

C 61

}

266 TABLES FOR REDUCING BAROMETRICAL OBSERVATIONS.

must thus be diminished by the amount of that of the scale, that is, by nearly +5,
this being the proportion between the expansion of brass and that of mercury.

It is also the expansion of the scale which causes an apparent anomaly in the
Tables for the Reduction of the English and Old French Barometers. It can be
seen, that, though the observations are to be reduced to the freezing point, or ta
32° Fahrenheit and zero Reaumur, the Tables give still a correction for observas
tions taken at that temperature. The reason of it is, that the normal length of the
English and Old French standards has not been determined at the temperature of the
freezing point, as is the case with the metre, but respectively at the temperatures
of 62° Fahrenheit and 13° Reaumur. It is thus only at these temperatures that the
scales graduated with these standards have their true length. Above and below, the
inches of the scales are longer or shorter than the inches of the standards. At the
freezing point, therefore, the correction for the expansion of the mercury is null, but
that for the expansion of the scale is not. The scale being too short, the reading
will be too high, and a subtractive correction must still be applied, which will be
gradually compensated at lower temperatures by the now additive correction of the
mercurial column. Thus the point of no correction will occur at 28°.5 Fahrenheit,
instead of 32°, in the English Barometer, and at —1°.5 Reaumur, instead of zero,
in the Old French.

Schumacher has calculated and published in his Collection of Tables, &c., and in
his Jahr>uch for 1836, 1837, and 1838, extensive tables for the reduction of the Eng-
lish, Old French, and Metrical Barometers, using the following general formula : —

Let h = observed height.

‘* ¢ = temperature of the attached thermometer.

“© 7T' = temperature to which the observed height is to be reduced.
‘© m = expansion, in volume, of mercury.

«© ] = linear expansion of brass.

‘¢ go = normal temperature of the standard scale.

The reduction to the freezing point will be given by the formula, —

Fp Mice Name oes
- 14m t—T)

The following tables, which may be found more convenient for ordinary use, have
been calculated from the same formula. Table XVII., published in the Instructions
of the Royal Society of London, is mostly abstracted from the table of Schumacher.
It gives the reduction of the English Barometer, adopting the following values : —

Let h = observed height in English inches.

‘© ¢ = temperature of attached thermometer in degrees of Fahrenheit.

‘¢ m — expansion, in volume, of mercury for one degree Fahrenheit = 0.0001001.

‘© 7 = linear expansion of brass for one degree Fahrenheit = 0.0000104344.

The normal temperature of standard being = 62°.

The reduction to 32° Fahrenheit will be given then by the formula,

iH h. m (t — 82) — 1 (t —62) :
1+ m (t — 382)

The elements for the other tables are found at the head of each.
C 62

> ae

ee ee ee eee

a a

267

OVE

ENGLISH BAROMETER.

TABLE

GIVING THE CORRECTION TO BE APPLIED TO ENGLISH
BAROMETERS,

WITH BRASS SCALES EXTENDING FROM THE CISTERN TO THE TOP OF
THE MERCURIAL COLUMN, FOR REDUCING THE OBSERVATIONS

TO THIRTY-TWO DEGREES FAHRENHEIT.

i r i 4 eNne
. 6) ayy
Re et a eae
,
: ‘
be
. ar :
> .
; f ia

269
Tasie XVII.

Tue following Table, calculated after that of Schumacher, has been adopted by the
Committee of Physics and Meteorology of the Royal Society of London. It gives
immediately the correction fer every degree of Fahrenheit, and for every half-inch
from 20 up to 31 inches. The scale of the barometer is supposed to be of brass,
extending from the cistern to the top of the mercurial column. The difference of ex-
pansion of brass and mercury is taken into account. The standard temperature of
the yard being 62° Fahr., and not 32° Fahr., the difference of expansion of the scale
and of the mercurial column carries the point of no correction down to 29° Fahr.
Therefore, from 29° up the correction musi Le swbtracted from, from 29° down it must
be added to, the observed height.

Examples of Calculation.

Barometer, observed height, é : . ° : 30.231
Attached thermometer 82° Fahr.

See in the last page the column of 30 inches; go down as far as the horizontal
ine corresponding with 82° in the first vertical column, which contains the tempera-
lures ; you will find there the correction —.143. We have thus : —

Barometer, observed height, . ° ° ° ° 30.231
Subtractive correction for 82° Fahr., ° ° - —0.143

oD

Barometer at 32° Fahr., < c e 30.088

Barometer, observed height, _. : : ° : 29.743
Attached thermometer 25° Fahr.
The column of 29.5 inches opposite to 25° Fahr. gives an
additive correction of, . : . : . : . - -+0.009

Barometer at 32° Fahr., : : : 29.752

It will be easy to apply also the correction for fractions of a degree Fahrenheit
for example : —

Barometer, observed height, < : ‘ ° ° 28.358
Attached thermometer 71.3
In the column of 28.5 inches, we find that the difference between
the correction for 71° and that for 72° is .003; dividing this differ-
shee proportionally to the fraction, we have for three tenths of a de-
sree a correction of —.001, which added to —.108, the correction
for 71°, makes a total correction of, : 5 . “ —.109

And barometer at 32° Fahr., . : - 28.249
C 65

(geet

270 XVII. REDUCTION OF THE ENGLISH BAROMETER TO THE FREEZING POINT.

English Inches.

Degrees Degrees
of Fah- ~ || of Fah-
reahelt | 90 | 20.5 | 24 | 21.5 | 22 | 22.5 | 28 | 2a.5 |] nt
eRe ee eee
+.051 | 4.053 | +.054 | +055 | 4.056 | +.058 | +.059 | +.060 0
049 051 052 053 054 056 057 058 1
048 049 050 051 052 054 055 056 9
046 047 048 049 050 052 053 054 3
044 045 046 047 048 050 051 052 4
| 042 043 044 045 046 048 049 050 5
#0400 154-1049) :.|:4:0404 Pe ORe alate code lt.045)sb4048 6
039 040 041 042 042 044 044 046 7
037 038 039 040 041 041 042 043 8
035 .036 057 038 -039 -039 -040 041 9
033 034 035 036 037 037 038 039 10
+031 | +.032 | +.033 | +.034 | +.085 | +.035 | +.036 | +.037 11
030 030 031 032 033 033 034 035 12
028 029 029 030 031 031 032 033 13
026 027 027 028 029 029 030 031 14
024 025 026 026 027 027 028 029 15
|
+.022 | +093 | +.024 | 4.094 | +095 | +.025 | +.096 | +.096 16
021 ‘021 022 022 023 023 024 024 17
019 019 020 020 021 ‘021 022 022 18
017 018 018 018 019 019 020 020 19
015 016 016 016 017 ‘017 018 018 20
£0144) 42014 42014. | 4OlsaeeeO1s) siech OLS sie ols es ecrole 21
012 012 012 013 013 013 013 014 29
010 010 010 ‘011 ‘O11 ‘011 ‘O11 012 23
008 008 009 009 009 009 009 010 24
006 007 007 007 007 007 007 007 25
i
+.005 | +.005 | +.005 | +.005 | +.005 | +.005 | +.005 | +.005 2b
| 003 003 003 003 003 003 003 003 27
| ‘001 ‘001 001 ‘001 001 001 001 ‘001 28
—001 | —.001 | —001 | —.001 | -.001 | —.001 | —.0o1 | —.001 29
| 003 003 003 003 003 003 003 003 30
—005° | —005 |.—.005 | —0o5. |.—.005 |. —.005.. | 005 |. =.005 31
006 006 007 007 007 007 007 007 32
008 008 008 009 009 009 009 010 33
i 010 010 010 ‘O11 ‘O11 ‘Ol ‘O11 012 34
: 012 012 012 ‘013 013 013 013 014 35
=018) | —O14 | 014 |= 014. 4-015 ule 01s al SOlG le ole 36
015 ‘016 016 016 ‘017 017 018 018 37
017 O17 ‘018 018 019 019 020 020 38
019 ‘019 020 020 021 ‘021 022 022 39
‘021 021 022 022 023 023 024 024 40
—o22 | —023 | -—.024 | —024 | —.025 | —.025 | —.026 | —.026 41
024 025 025 026 027 027 028 028 42
026 027 027 028 029 029 030 031 43
| 028 029 029 030 031 |. .031 032 033 44
030 030 031 032 033 033 034 035 45
| -—031 | -—o32 | —o33 | —034 | —.035 | -.035 | —.036 | —.037 46
033 034 035 036 036 037 038 039 47
| 035 036 037 038 038 039 040 ‘041 48
037 038 039 040 040 041 042 043 49

if 50 .038 039 040 O41 042 | 043 044 045 50 |
C 66

fo~

a oe a ee

REDUCTION OF THE ENGLISH BAROMETER TO THE FREEZING POINT. 21

5 English Inches. |
Degrees Degrees

Beboh sl poe | aE cor | Unit soa oo to aloe all pot sah:
renheit, renheit,

20 20.5 2 21.5 22 22.5 23 23.5

—>{ | |] | | |

|
{
| ° ° |
51 —.040 —.041 —.042 —.043 —.044 —.045 —.046 =O. 51
52 .042 -043 -044 045 .046 047 048 .049 52
53 -044 045 -046 047 048 -049 -050 -052 53
! 54 -046 -047 -048 049 -050 051 052 054 | 54
55 -047 -049 .050 O51 052 053 -055 056 | 55 |
56 —.049 —.050 —.052 —.053 —.054 —.055 =H 0}57/ —.058 56
57 051 052 .054 .055 .056 .057 .059 060 | 57
58 -053 054 .055 .057 -058 059 -061 062 | 58
59 -055 -056 057 .059 -060 O61 .063 064 59
60 -056 -058 059 061 -062 063 065 -066 60
61 —.058 —.060 —.061 —.062 —.064 —.065 — 06" —.068 61
62 .060 061 .063 .064 -066 .067 .069 .070 62
63 .062 -063 .065 .066 -068 .069 071 LOn2 a) 63
64 .063 .065 .067 -068 .070 .071 .073 075 64
65 .065 .067 -068 .070 072 .073 075 -077 65
66 —.067 —.069 —.070 —.072 —.074 —.075 —.077 —.079 66
67 .069 O71 072 .074 076 077 .079 O81 67
68 071 072 074 -076 078 079 O81 083 68
69 .072 O74 .076 078 -080 O81 -083 -085 69 |
70 074 -076 078 -080 -082 -083 -085 -087 70 |
71 —.076 —.078 —.080 —.082 —.083 —.085 —.087 —.089 71
72 .078 -080 -082 .084 -O85 -087 -089 O91 72 (|
73 .079 -O81 083 O85 O87 .089 O91 .093 73
74 O81 -083 -085 -087 089 O91 093 095 74
75 .083 -085 087 -089 O91 -093 -095 098 75
76 —.085 —.087 —.089 —.091 — 093 —.095 —.097 —.100 76
aids -087 .089 -091 .093 095 .097 -100 102 a
78 .088 O91 093 -095 .097 .099 -102 104 78
79 -090 -092 -095 .097 -099 101 -104 -106 79
80 092 094 -096 099 - 101 -103 -106 -108 80
81 —.094 —.096 —.098 —.101 —.103 —.105 —.108 a) 81
82 .095 .098 -100 103 -105 107 110 112 82
83 .097 -100 -102 104 107 -109 “2 114 83
84 -099 101 104 -106 -109 11 114 116 84
85 OL 103 -106 108 oll Mil 113 116 118 85
86 —.103 —.105 —.108 —.110 —.113 —.115 -—.118 —.120 86
87 104 107 -109 m2 115 LT -120 123 87
88 -106 109 alia 114 117 UD .122 2D 88
89 108 ut 13 -116 Fg 121 124 eli 89
90 110 -112 WTS 118 a2 123 -126 a1129 90
91 = 111 —.114 —117 —.120 —.122 — 125 —.128 —.131 91
92 113 116 -119 -122 124 .127 .130 155 92
93 115 118 aT 124 -126 129 132 135 93
94 ley -120 122 125 128 131 134 137 94
er nod 118 121 124 127 -130 133 -136 139 |x 95
fies 196 —.120 — 123 —.126 —.129 —.132 —.135 —.138 —.141 96
97 -122 -125 128 131 134 oll 37 -140 -143 97
98 124 -127 130 -133 136 139 142 145 98
99 el25 -129 132 -135 138 141 144 147 99 |
§ 100 127 -130 134 137 140 | .143 -146 .150 100 I

272 REDUCTION OF THE ENGLISH BAROMETER TO THE FREEZING POINT.

| English Inches,
D

ezrees i Degrees

of Fah- of eal
heit. it.
Wee 24 | 24.5 | 25 | 25.5 | 26 | 265 | 27 | axn5
Oo oO
0 +.061 +.063 +.064 | +.065 +.067 +.068 | +.069 | +.071 0
1 .059 061 .062 .063 .064 .065 .067 .068 1
2 057 .058 .060 061 .062 .063 .064 .066 2
3 055 056 057 059 .060 061 062 .063 3
4 .053 054 055 056 057 058 059 061 4
5 051 052 053 054 055 056 057 058 5
6 +.049 | +.050 | +.051 +.052 | +.053 +.054 | +.055 +.056 6
7 046 047 048 049 050 051 052 053 7
8 044 045 046 047 .048 049 .050 051 8
9 042 043 044 045 046 046 047 .048 9
10 .040 041 042 .042 043 044 045 046 10
11 +.038 | +.039 | +.0389 | +.040 +.041 +.042 +.042 | +.043 11
12 .036 .036 037 .038 .039 039 .040 041 12
13 .033 034 .035 .036 038 .037 .038 .038 13
14 031 .032 033 033 034 035 035 036 14
15 029 .030 .030 031 .032 032 033 .033 15
16 +.027 +.028 | 4.028 | +.029 +.029 +.030 | +.030 +.031 16
17 025 025 .026 026 .027 027 .028 .028 17
18 .023 .023 024 024 025 025 .025 026 18
19 021 021 021 .022 022 023 .023 024 19
20 018 .019 019 .020 .020 .020 021 021 ZO
21 301604) 4-017; +.017 | +.017 +.018 | +.018 +.018 +.019 21
22 014 014 015 015 015 016 .016 016 22
23 012 012 012 013 013 013 013 014 23 P
24 .010 .010 .010 .010 011 011 011 011 24 $
25 .008 .008 .008 .008 .008 .008 .009 .009 25 :
26 +.005 +.006 | +.006 | +.006 +.006 +.006 | +.006 | +.006 26
27 .003 .003 .003 .003 .004 004 004 004 Q7
28 001 001 001 001 001 001 001 001 28
29 —.001 —.001 —.001 —.001 —.001 —.001 —.001 —.001 29 ;
30 .003 .003 .003 004 004 .004 .004 004 30 i
31 -.005 | —.006 | —.006 | —.006 | —.006 | —.006 | —.006 | —.006 31
32 .008 .008 .008 .008 .008 .008 .008 .009 32
33 010 .010 .010 .010 011 O11 O11 011 33
34 012 012 012 013 013 013 013 014 34
35 014 014 015 015 015 015 .016 016 35
;
36 -.016 | —017 | —.017 | —.017 | —.017 | —.018 | —.018 | —.019 36 }
37 018 019 019 019 .020 .020 021 021 37 i
38 .020 021 021 022 .022 023 .023 023 38 .
39 .023 023 024 024 024 025 025 .026 39
40 025 025 .026 .026 .027 027 028 .028 40 ;
¥
> Atl —.027 —.027 | -—.028 | —.029 | —.029 | —.030 | —.030 | —.031 41
42 .029 .030 .030 031 031 ! 032 .033 033 42
43 031 032 032 033 034 034 035 .036 43
A4 033 034 035 035 .036 037 .037 .038 44
45 035 036 037 .038 .038 039 .040 041 45
: a
C 68 é

REDUCTION OF THE ENGLISII BAROMETER TO THE FREEZING POINT. 973

—— eee

English Inches.

Degrees Degrees
mol Fah- of Fah-
renheit- || og | o4.5'| 25 | 295.5 (26 | 296.5 | 27 | a7.5°

oO Oo
51 —.048 —.049 —.050 —.051 =a) —.053 —.054 —.055 51
52 -050 052 .053 054 -055 -056 057 058 52
53 053 054 -055 056 057 058 059 -060 53
! 54 055 -056 .057 058 .059 .060 .062 -063 54
| 55 -057 -058 .059 -060 .062 063 -064 065 55
56 —.059 —.060 —.061 —.063 —.064 —.065 —.066 —.068 56
57 061 .062 .064 .065 .066 068 -069 -070 57
58 .063 .065 .066 .067 .069 .070 071 073 58
59 .065 .067 -068 .070 .071 .072 .074 075 59
60 -068 -.069 .070 072 073 075 .076 077 60
61 —.070 —.071 —.073 —.074 —.075 —.077 —.078 —.080 61
62 .072 .073 .075 076 .078 .079 O81 082 62
63 .074 .076 .077 .079 -080 N82 -083 .085 63
64 .076 .078 .079 O81 -082 084 -086 -087 64
| 65 .078 -.080 .082 .083 -085 -086 -088 .090 65
66 —.080 —.082 —.084 —.085 —.087 —.089 —.090 —.092 66
67 .083 084 -O86 088 -089 -091 .093 .095 67
68 .085 086 O88 -.090 .092 -094 .095 .097 68
69 .087 .089 .090 .092 .094 .096 .098 -100 69
70 -089 -091 -093 095 .096 .098 -100 -102 70
71 —.091 —.093 —.095 —.097 —.099 —.101 —.102 —.104 71
72 .093 .095 .097 .099 101 103 -105 107 72
73 095 .097 099 -101 -103 105 -107 -109 73
| 74 .097 .099 -102 104 -106 -108 -110 112 74
75 -100 102 104 -106 .108 -110 112 114 75
76 —.102 —.104 —.106 —.108 —.110 —.112 —.114 = PLT 76
Wi 104 -106 108 -110 112 115 117 119 77
78 -106 -108 110 Lis 115 alli Wi 119 122 78
79 -108 -110 113 “115 117 119 122 124 79
80 -110 113 l15 Allee -119 122 124 .126 80
81 —.112 —.115 = 117 —.119 —.122 —.124 —.126 —.129 81
82 114 117 119 5122 124 .126 129 ol 82
83 shy. 119 121 -124 126 129 5133) 134 83
84 -119 121 124 -126 129 131 134 136 84
85 a2] 123 -126 128 131 133 136 139 85
86 —.123 —.126 —.128 alle —.133 —.136 —.138 —.141 86
87 125 128 .130 los 136 138 141 143 87
88 aa. -130 ass} 135 138 141 143 146 88
89 -129 132 135 .137 -140 143 -146 148 89
| 90 131 134 .137 -140 142 145 148 151 90
: 91 —.134 —.136 —.139 —.142 —.145 —.148 —.150 —.153 91
92 136 139 141 144 147 -150 153 156 92
93 138 141 144 147 -149 152 155 -158 93
94 140 143 146 149 152 155 Lod 161 94
95 142 145 148 Sil 154 -157 -160 163 95
96 —.144 —.147 —.150 —.153 —.156 —.159 —.162 —.165 96
97 146 149 152 -156 .159 162 .165 168 97
98 .148 152 155 158 -161 -164 167 .170 98
99 151 154 157 -160 -163 .166 -169 173 399
\00 LoS -156 -159 -162 -165 .169 172 175 100
|
peel Senay. y

C 69

274 REDUCTION OF THE ENGLISH BAROMETER TO THE FREEZING POINT.

English Inches.

Degrees of Degrees of
Fahren- Fahren-
heit. heit.

28 28.5 29 29.5 30 30.5 3k

!
| ° °
0 |i 4.072 +.073 +.074 +.076 +.077 +.078 +.080 0
| 1 069 071 072 073 074 076 077 1
9 067 068 069 070 072 073 074 2 |
| 3 064 065 067 068 069 070 071 3
4 062 063 064 065 066 067 .068 “
5 059 060 061 062 063 065 066 5
6 +.057 +.058 +.059 +.060 +.061 +.062 +.063 6 |
7 054 055 056 057 058 059 060 Tac
8 052 053 054 054 055 056 057 8
9 049 050 051 052 053 054 054 9
10 047 047 048 049 050 051 052 10
11 4.044 | 4.045 +.046 +.046 +.047 +.048 +.049 ll
12 042 042 043 044 045 045 046 12
13 039 040 040 O41 042 043 043 13
14 037 037 03 038 039 .040 040 14
| 15 034 035 035 036 036 037 038 15
ie vag +.032 +.032 +.033 +.033 +.034 +.034 +.035 16
17 029 030 030 031 031 032 032 17
18 026 027 027 028 028 029 029 18
19 024 024 025 025 026 026 027 19
20 021 022 022 023 023 023 024 20
21 +.019 +.019 +.020 +.020 +.020 +.021 +.021 21
99 016 017 O17 017 018 018 018 99
23 Ol4 O14 014 O15 O15 015 O15 23
| 24 O11 012 012 012 012 012 013 24
| 2 .009 009 009 009 009 010 010 25
| 26 +.006 +.006 +.007 +.007 +.007 +.007 +.007 26
1 oF 004 004 004 004 004 004 004 97
| 28 001 001 001 001 001 001 001 28
29 —.061 -.001 - 001 -.001 -.001 -.001 —.001 29
30 004 004 004 004 004 004 004 30
31 ~.006 —.006 -.007 -.007 —.007 -.007 —.007 31
32 009 009 009 009 009 010 010 32
33 O11 012 012 012 012 012 012 33
34 014 O14 Ol4 O15 015 015 O15 34
| 35 016 017 017 017 018 018 018 35
36 -.019 -.019 —.020 —.020 —.020 —021 —.021 36
37 021 022 022 022 023 023 024 37
025 025 026 026 026 38
¢ 027 028 028 029 029 39
030 .030 031 031 032 40
—.033 —.033 —.034 —.034 -.035 41
035 036 036 037 037 42
: | 038 038 039 040 040 43
| 040 O41 042 042 043 44
. 043 044 044 045 046 45
|
| -.045 -.046 —047 —.048 -.049 46
048 049 050 051 051 47
| 051 052 052 053 054 48
053 054 055 056 057 49
| 036 057 058 059 060 50

70

REDUCTION OF THE ENGLISH BAROMETER TO THE FREEZING POINT.

Fahren-

| Degrees of
| heit.

106
-109
-lll
114
-116

-119
121
-124
-126
129

131
134
136
139
141

144

-153

275

———_$$——_—_—————

English Inches.

28.5

—.057
-060
-063
065
-068

—.070

080

093

—.096
098
-101
-103
-106

—.108
All
113
116
118

—.121
123
-126
-128
-131

-.134
136
139
-141
-144

—.146
149
-151
154
-156

—.159
-161
164
-166
-169

-.171
174
176
179
181

—.084

095

—.097
-100
-102
-105
-108

—.110
113
115
118
-120

—.123
-126
-128
131
133

—.136
138
-141
-144
146

—.149
151
154
156
-159

—.162
164
167
169
Lae

—.174
leieas
-179
-182
184

29.5

—.059
-062
065
067
070

—.073
075
078
-080
083

—.086
-088
-091
-094
-096

199
-102
104
-107
-109

—.112
-L15
aii
-120
-122

—.125
128
-130
-133
-136

—.138
141
143
-146
149

—.151
154
ola
159
-162

—.165
-167
170
172
175

—.178
-180
-183
-185
-188

71

30

—.060
-063
-066
-068
071

—.074
076
079
-082
085

—.087
-090
-093
095
-098

—.101
-103
-106
-109
lll

—.114
male
119
-122
-125

tif)
130
133
135
-138

—.141
143
146
149
151

—.154
or
159
-162
-164

—.167
170
172
Wo
178

—.181
-183
186
188
191

30.5

—.061

-064
067
-070
072

=0.75
078

O81
083
086

—.089
091
094
097
-100

— 102
105
-108
110
113

— TG
-119
121
-124
127

—.129
-132
135
137
-140

—.143
-146
-148
-151
154

—.156
159
-162
-165
-167

—170
172
175
lured
-180

—.183
-186
188
191
194

3

—.062
065
-068
071
073

—.076
079
-082
085
087

—.090
093
096
098
-101

— 104
-107
109
elt
= i)

—hS
-120
123
-126
-129

— 131
34
137
-140
-143

—.145
148
151
154
156

eaalloo
-162
165
-167
170

7s
175
178
-180
183

—.186
189
191
194
197

Degrees of
Fahren-
heit.

i
{I
\

276

TA BiB, Nil is

FOR REDUCING THE INDICATIONS OF ENGLISH BAROMETERS, WITH WOODEN OR
GLASS SCALES, TO THE FREEZING POINT.

Ix most of the common barometers the scale is engraved upon a short plate of
brass, or of ivory, fixed upon the wooden frame of the instrument. In such a case,
the compound expansion of the two substances can only be guessed at, and the cor-
rection to be applied to the observations for reducing them to the freezing point can-
not be determined with precision. As a near approximation for such imperfect
instruments, the following table may be used. In computing this table, the expansion
of glass, which is less than that of brass and greater than that of wood, has been
substituted for that of brass, as an approximate value for a scale composed of these
last two substances. The table thus gives the true correction, in English inches,
for the barometers, the graduation of which is engraved on the glass tube itself. It
answers equally for any English barometer with wooden scale, whatever be the sub-
stance of which the short plate bearing the graduation is made.

CORRECTIONS TO BE APPLIED TO ENGLISH BAROMETERS, WITH WOODEN OR GLASS
SCALES, TO REDUCE THE OBSERVATIONS TO THE FREEZING POINT.

Expansion of Mercury for 1° Fahr. = 0.0001001; of Glass for 1° Fahr. = 0.00000444.

Barometer in English Inches.

Attached
POQeR EL ea
eter, | | | | | | | |
eee lh ae (26.5) 27 27.5) 28 28.5 29 29.5) 30 30.5) 31
0 +.076 | +.077 | +.079 | +.080 | +.082 | +.083 | +.085 | +.086 | +.088 | +.089 | +.090
1 +.073 | +.075 | +.076 | +.078 | +.079 | +.080 | +.082 | +.083 | +.085 | +.086 | +.088
2 +.071 | +.072 | +.074 | +.075 | +.076.| +.078 | +.079 | +.080 | +.082 | +.083 | +.085
3 +.068 | +.070 | +.071 | +.072 | +.074 | +.075 | +.076 | +.078 | +.079 | +.080 | +.082
4 +.066 | +.067 | +.069 | +.070 +.071 +.072 +074 | +.075 +.076 | +.077 | +.079
5 +.064 | +.065 | +.066 | +.067 | +.068 | +.070 | +.071 | +.072 | +.073 | +.074 | +.076
6 +.061 | +.062 | +.063 | +.065 | +.066 | +.067 +.068 | +.069 +.070 +.072 +.073
"7 +.059 | +.060 | +.061 | +.062 | +.063 | +.064 | +.065 | +.067 | +.068 | +.069 | +.070
8 +.056 | +.057 | +.058 | +.059 | +.060 | +.061 | +.063 | +.064 | +.065 | +.066 | +.067
9 +.054 | +.055 +.056 | +.057 | +.058 | +.059 | +.060 |'+.061 | +.062 | +.063 | +.064
10 +.051 | +.052 | +.053 | +.054 | +.055 | +.056 | +.057 | +.058 | +.059 | +.060 | +.061 ||
11 +.049 | +.050 +.051 +.051 | +.052 | +.053 | +.054 +.055 | +.056 | +.057 | +.058
12 +.046 | +.017 | +.048 | +.049 +.050 | +.051 | +.052 +.052 | +.053 | +.054 | +.055
13 +.044 | +.045 | +.045 | +.046 | +.047 | +.048 | +.049 +.050 | +.050 | +.051 | +.052
| 14 || +.041 | +.042 | +.043 | +.044 | +.014 | +.045 | +.046 | +.047 | +.048'| +.048 | +.049

| 15 +.039 | +.059 | +.040 | +.041 | +.042 | +.042 | +.043 +.044 | +.045 +.045 | +.046
| 16 || +.036 | +.037 | +.039 | +.010 | +.040 _+.041 | +.042 +.043 | +.043
| 7 +.034 | +.034 | +.035 | +.036 | +.036 | +.037 | +.038 | +.038 | +.039 +.040 | +.040
|

of
S
oe
oO
“fe
So
w
a

18 +.031 | +.082 | +.032 | +.033 | +.034 | +.034 | +.035 | +.036 | +.036 +.037 | +.037
19 +.029 | +.029 | +.030 | +.030 | +.031 | +.032 | +.032 +.033 | +.033 +.034 | +.034

20 +.026 +.027 | +.027 | +.028 | +.028 | +.029 | +.029 +.030 | +.030 +.031 | +.031

t
¢

REDUCTION OF THE ENGLISH BAROMETER TO THE FREEZING POINT. ai
Barometer with Glass or Wooden Scale.
Barometer in English Inches.
Attached
Thermom-
eter, |
Fahren- |
heit. 26 | 26.5, 27 | 27.5) 28 | 28.5) 29 | 29.5) 30 |30.5'| 3
a1 || +.024 | +.024 | +.025 | +.025 | +.026 | +.026 | +.027 | +.027 | +.028 | +.028 | +.028
99 +.021 | +.022 | +.022 | +.023 | +.022 | +.023 | +.024 | +.024 | +.025 | +.025 | +.025
23 +.019 | +.019 | +.020 | +.020 | +.020 | +.021 | +.021 | +.021 | +.022'| +.022 | +.023
24 +.016 | +.017 | +.017 | +.017 | +.018 | +.018 | +.018 | +.019 | +.019 | +.019 | +.020
25 +.014 | +.014| +.014 | +.015 | +.015 | +.015 | +.016 | +.016 | +.016 | +.016 | +.017
26 +.011 | +.012 | +.012 | +.012 | +.012 | +.013 | +.013 | +.013 | +.013 | +.013 | +.014
27 +.009 | +.009 | +.009 | +.009 | +.010 | +.010 | +.010 | +.010.| +.010 | +.011 | +.011
28 +.006 | +.007 | +.007 | +.007 | +.007 | +.007 | +.007 | +.007 | --.007 | +.008 | +.008
29 +.004 | +.004 | +.004 | +.004 | +.004 | +.004 | +.004 | +.005 | +.005 | +.005 | +.005
30 +.002 | +.002 | +.002 | +.002 | +.002 | +.002 | +.002 | +.002 | +.002 | +.002 | +.002
31 —.001 | —.001 | —.001 | ~.001 | -.001 | —.001 | —.001 | —.001 | —.061 | —.001 | —.001
32 —.003 | —.004 | —.004 | —.004 | —.004 | —.004 | —.004 | —.004 | —.064 | —.004 | —.004
33 —.006 | —.006 | —.006 | ~.006 | —.006 | —.007 | —.007 | —.007 | —.007 | —.007 | —.007
34 —.008 | —.009 | —.009 | —.009 | —.009 | —.009 | -.009 | —.010 | -.¢16 | —.010 | —.010
35 || —.011 | -.011 | —.011 | —.012 | —.012 | —.012 | —.012 | —.012 | ~.c13 | —.013 | —.013
1
36 =.013'| —.014 | '—.014'| —.014 | —.014 |\—.015 | —.015 | —.015 | =.C15 | —.016 | =.016
37 —.016 | —.016 | —.017 | —.017 | —.017 | —.017 | —.018 | —.018 | —.018 | —.019 | —.019
38 —.018 | —.019 | —.019 | —.019 | —.020 | —.026 | —.020 | —.021 | —.021 | —.022 | —.022
39 —,.021 | —.021 | —.022 | —.022 | —.022 | —.023 | —.023 | —.024 | —.024 | —.024 | —.025
40 || —.023 | —.024 | —.024 | —.025 | —.025 | --.026 | —.026 | —.026 | —.027 | —.027 | —.028
Ria —.026 | -.026 | —.027 | —.027 | —.028 | —.028 | —.029 | —.029 | -.030 | —.030 | —.031
42 —.028 | —.029 | —.029 | —.030 | —.030 | —.031 | —.032 | —.032 | —.033 | —.033 | —.034
43 —.031 | —.031 , —.032 | -.033 | —.033 | —.034 | -.033 | —.035 | —.036 | —.036 | —.037
AA —.033 | —.034 | —.035 | —.035 | —.036 | —.036 | —.036 | —.038 | —.038 | —.039 | —.040
45 —.036 | —.036 | —.037 | —.038 | —.038 | —.039 | —.039 | —.041 | —.041 | —.042 | —.043
46 —.038 | —.039 | —.040 | —.040 | —.041 | —.042 | —.042 | —.043 | —.044 | —.045 | —.046
AT SOT |) SO |) ye —.043 | —.044 | —.045 | -.044 | —.016 | —.047 | —.048 | —.049
48 —.013 | —.044 | —.045 | —.046 | —.047 | —.047 | —.017 | —.049 | —.050 | —-051 | —.051
49 —.046 | —.046 | —.047 | —.048 | —.049 | —.050 | —.050 | —.052 | —.053 | —.054 | —.054
50 —.048 | —.049 | —.050 | —.051 | —.052 | —.053 | —.054 | —.055 | —.056 | —.056 | —.057
51 —.051 | —.052 | —.053 | —.054 | —.055 | —.055 | —.056 | —.057 | —.058 | —.059 | —.060
52 —.053 | —.054 | —.055 | —.056 | —.057 | —.058 , —.059 | —.060 | —.061 | —.062 | —.063
53 —.056 | —.057 | —.058 | —.059 | —.060 | —.061 | —.062 | —.063 | —.064 | —.065 | —.066
54 —.058 | —.059 | —.060 | —.061 | —.063 =.064 —.065 —.066 | —.067 | —.068 | —.069 |j
55 —.061 | —.062 | —.063 | —.064 | —.065 | —.066 | —.068 | —.069 | —.070 | —.071 | —.072
56 —.063 | —.064 | —.065 | —.067 | —.068 stolen =.073)|'—:074 | =2075
57 —.065 | —.067 | —.068 | —.069 | —.071 | —.072 | —.073 | —.074 | —.076 | —.077 | —.078
58 —.068 | —.069 | —.071 | —.072 | —.073 | —.074 | —.076 | -.077 | —.078 | —.080 | —.081
59 || —.070 | —.072 | —.073 | -.074 | —.076 | -—.077 | —.079 —.080 | —.081 | —.083 | —.084
IL 60 —.073 | —.074 | —.076 | —.077 | —.079 | —.080 | —.081 | —.083 | —.084 | —.085 | —.087
c€ 73

278 REDUCTION OF THE ENGLISH BAROMETER TO THE FREEZING POINT.
Barometer with Glass or Wooden Scale.
i = = ——>
| Attached Barometer in English Inches.
Thermom-
| eter, = -
|| Fahren- ' | |
| heit. \ | | |
| 26 26.5 27 27.5) 28 28.55 29 |29.5 30 (30.5, 31
| |
| Tk | Pel ae |
| 61 | -.075 —.077) —.078 | -.080 -.031 -.083 | —.084 | —.086 —.087 | —-088 —.090
62 —.078 —.079 | —.081 —.082 | —.084 | —.085 | —.087 | —.088 —.090 | -.091 | -.093
63 —.080 —.082 | —.083 | —.085 | —.086 | —.088 | —.090 | —.091 —.093 | —.094 | —.096 |,
| | |
64 —.033 —.084 —.086 —.088 | —.089 —.091 | —.092 | —.094 -—.096 | —.097 —.099 |)
65 -.035 —.037 | —.089. —.090 —.092 | —.093 | —.095 | —.097 , —.098 | —.100 —.102
| |
| | | | |
| 66 —.088 | —.089 | —.091 | —.093 | —.094 | —.096 | —.098 | —.100 | —.101 | —.103 | —.104
67 -.090 —.092 | —.094 | —.095 —.097 | —.099 | —.101 | —.102 —.104 | —.106 —.108 ||
68 --093 | -.094 | —.096 | —.098 | —.100 | —.102 | —.103 | -.105 -.107 | —.109 —.110
69 —.095 —.097 | —.099 | —.101 | —.102 | —.104 | —.106 | —.108 —.110 | —.112 —.113
70 —.098 | —.099 | —.101 | —.103 | —.105.| —.107 | —.109 | —.111 , —.113 | —.114 | —.116 ||
| | |
71 —-100 | —.102 | —.104 | —.106 | —.108 | —.110 | —.112 | —.114 | —.115 | —.117 | —.119
lie ean —-103 | —.105 | —.106 | —.108 | —.110 | —.112 | —.114 | —.116 | —.118 | —.120 | —.122
| 73 —.105 | —.107 | —.109 | —.111 | —.113 | —.115 | —.117 | —.119 —.121 | —.123 | —.125
| 74 —.107 | —.110 | —.112 | —.114 | ~.116 | —.118 | —.120 | —.122 | —.124 | —.126 | —.328
75 —.110 | —.112 | —.114 | —.116 | A118 = 121 = 193) | — 195) — A27 129) | asd
| |
76 || —.112| —.115 | ~.117 | —.119 | —.121 | —.123 | —.125 | —.128 | —.130 | —.132 —.134
| 77 —115 | —.117 | —.119 | —.121 | —.124 | —.126 | —.128 | —.130 ; —.133 | —.185 | =.137
| 78 —.117 | —.120 | —.122 | —.124 | —.126 | —.129 | —-131 | —.133 | —.135 | —.138 | —.140
79 | —=.120) | =.122 |= .124 | — 427 429 |= .138) Nasa 136 | sshd aes
| 80 —.122 | —.125 | —.127 | —.129 | —.132 | —.134 | —.136 | —.139 | —.141 | —.143 | —.146
| | |
| 81 || —-125 | —.127 | —.130 | —.132 | —.184 | —.137 | —.139 | —.142 144k ste! =a1ae
| 82 || —-127 | —.130 —.132 | —.135 | —.137 | —.139 | —.142 | —.144 | —.147 | —.149 | —.152
| 83 | —.130 | —.132 | —.135.| —.137 | —.140 | —.142 | —.145 | —.147 (=.150 | —.152 | —.155
84 || —.182 | —.135 | -.137 | —.140 | —.142 | —.145 | —.147 | -.150 | —.152 | —.155 | —.158 ||
85 —.135 | —.137 | —.140 | —.142 | —.145 | —147 ; —.150 | —.153 | —.155 | —.158 | —.160
86 —.187 | —.140 | —.142 | —.145 | —.148 | —.150 | —.153'| —.155 | —.158 | +.161 | —.163
87 || —.139 | —.142 | —.145 | —.148 7-150 | =.153 | —.156 | -.158 | -.161 | —.164 | —.166
| 88 || —.142 | —.145 | —.147 | —.150 | —.153 | —.156 | —.158 | —.161 | —.164 | —.167 | —.169
| 89 —.144 | —.147 | —.150 | —.153 | —.156 | —.158 | —.161 | —.164 | —.167 | —.169 | —.172
| |
| 90 || —-147 | —.150 | —.153 | —.155 | —.158 | —.161 | —.164 | —.167 | —.169 | —.172 | —.175
| Went | |
| 91° || —-149 | —.152 | —.155 | ~.158'|—.161'| —.164'| —.167 | —.169 | —.172 | -—.175 -.178
| 92 || —.152 | —.155 ; —.158 | —161 | —.163 | —.166 | —.169 | —.172 | —.175 | —.178 | =-181
| 93 —.154 | —.157 | —.160 | —.163 | —.166 | —.169 | 179.175 VTSh si ees
94 —.157 | —.160 | —.163 —.166 | —.169 | —.172 | —.175 | —.178.| —.181 | —.184 | —.187
| 95° ‘|| —-159 | —.162 | —.165 | —.168 | —.171 | —.174 | —.178 | —.181 | —.184 | —.187 | —.190
\| | |
| | |
\| | |
| 96 || —.162 | —.165 | —.168 | —.171 | —.174 | —.177 | -.180 | —.183 | —.186 | —.190 | —.193
97- || —.164 | —.167 | —.170 | —.174 | —.177 | —.180 | —.183 | —.186 | —-189 | —.192 | —.196
| 98 || —-167 | —.170 | —.173 | —.176 | —.179 | —.183 | —.186 | —.189 | —.192 | —.195 | —.199
| 99 || —.169 | —.172 | —.175 | —.179 | —.182 | —.185 | —.188 | —.192 | —.195 | —.198 | —.201
| | | | |
|} 100 || —.171 | —.175 | —.178 | —.181 | —.185 | —.188 | —.191 | —.194 | —.198 | —.201 | —.204 ||
C 74

279

XIX.

METRICAL BAROMETER.

TABLE
REDUCING TO THE FREEZING POINT THE PAROMETRICAL
COLUMN,

MEASURED BY BRASS SCALES, EXTENDING FROM THE CISTERN TO
THE TOP; CALCULATED FROM 260 TO 865 MILLIMETRES,
AND FOR EACH DEGREE CENTIGRADE.
By M. T. Detcrus.

L 6} 73!

‘
n
‘
" . UAT ,

281
Taste XIX.

Tuts table has been calculated by using the following coefficients of dilatation : —
Brass, linear dilatation, from Laplace and Lavoisier for 100°.C. = 0.0018782.
Mercury, dilatation in volume, from Dulong and Petit for 100° C. = 0.0180180.
Dilatation of the mercurial column for 100° C. . : A = 0.0161398.
Dilatation of the mercurial column for 11°C. . ° - = 0.0001614.
Observed height reduced to freezing point,

H = h—h (0.0001614). T=h—h(Z).

The second term of this last formula is given by the table. when the temperature
T and the height h of in¢ barometer are known; this correction must be subtracted
from the observed height h, when the temperature is above freezing point ; it is to be
added when the temperature is below zero, or freezing point.

This table allows the barometrical heights taken at the highest summits, and ‘n the
deepest mines, to be corrected.

Examples of Calculation.

. mm,
Barometer, observed height, . . ° ° ° 567.49
Temperature of the barometer, +-12°.7,

for 10.0 = 0.912
Second page, ; for 2.0 = 0.182
for 0.7 = 0.064

Total, = 1.158
Subtractive correction, A . : : . - — 1.16

Barometer at zero, 566.33

Barometer, observed height, . afl 6 5 : 454.17
Temperature of the barometer, —7°.8.
First ; for 7.0 = 0.514
er PaSe 2 for 0.8 = 0.059
Total, = 0.573
Additive correction, OP Ube Gua ry » +0.57

Barometer at zero, 454.74

282

Height

of the

Barome-
ter.

Millim.
260
265
270
275
280

285
290
295
300
305

360

XIX. REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

qe

0.042
0.043
0.044
0.044
0.045

0.046
0.047
0.048
0.048
0.049

0.050
0.051
0.052
0.052
0.053

0.054
0.055
0.056
0.056
0.057

0.058
0.059
0.060
0.060
0.061

0.062
0.063
0.064
0.065
0.065

0.066
0.067
0.068
0.068
0.069

0.070
0.071
0.072
0.073
0.073

qe
|

Millim.

Qo

Millim.

0.084
0.086
0.087
0.089
0.090

0.092
0.094
0.095
0.097
0.098

0.100
0.102
0.103
0.105
0.106

0.108
0.110
0.111
0.113
0.115

0.116
0.118
0.119
0.121
0.123

0.124
0.126
0.127
0.129
0.131

0.132
0.134
0.136
0.137
0.139

0.140
0.142
0.144
0.145
0.147

Q°

TEMPERATURE CENTIGRADE.

4°

3°

Millim.

0.126
0.128
0.131
0.133
0.136

0.138
0.140
0.143
0.145
0.148

0.150
0.152
0.155
0.157
0.160

0.162
0.165
0.167
0.169
0.172

0.174
0.177
0.179
0.182
0.184

0.186
0.189
0.191
0.194
0.196

0.198
0.201
0.203
0. ne
0.2

0.211
0.213
0.215
0.218
0.220

3°

Millim.

0.168
0.171
0.174
0.178
0.181

0.184
0.187
0.190
0.194
0.197

0.200
0.203
0.207
0.210
0.213

0. as
0.2

0. ee
0.226
0.229

0.232
0.236
0.239
0.242
0.245

0.249
0.252
0.255
0.258
0.261

0.265
0.268
0.271
0.274
0.278

0.281
0.284
0.287
0.290
0.294

4°

0.210
0.214
0.218
0.222

e2iu

0.226

0.230
0.234
0.238
0.242
0.246

0.250
0.254
0.258
0.262
0.266

0.270
0.274
0.278
0.282
0.286

0.290
0.294
0.299
0.303
0.307

0.311
0.315
0.319
0.323
0.327

0.331
0.335
0.339
0.343
0.347

0.351
0.355
0.359
0.363
0.367

§°

Millim.

Millim.

0.252
0.257
0.261
0.266
0.271

0.276
0.281
0.286
0.291
0.295

0.300
0-305
9.310
0.315
9.320

0.324
0.329
0.334
0.339
0.344

0.349
0.353
0.358
0.363
0.368

0.373
0.378
0.382
0.387
0.392

0.397
0.402
0.407
0.411
0.416

0.421
0.426
0.431
0.436
0.441

6

7

Millim.
0.294
0.299
0.305
0.311
0.316

0.322
0.328
0.333
0.339
0.345

0.350
0.356
0.361
0.367
0.374

0.379
0.384
0.390
0.395
0.401

0.407
0.412
0.418
0.424
0.429

0.435
0.441
0.446
0.452
0.457

0.463
0.469
0.474
0.480
0.486

0.491
0.497
0.503
0.508
0.514

9°

&°

Millim.
0.336
0.342
0.349
0.355

0.362

0.368
0.374
0.381
0.387
0.394

0.400
0.407
0.413
0.420
0.426

0.432
0.439
0.445
0.452
0.458

0.465
0.471
0.478
0.484
0.491

0.497
0.504
0.510
0.516
0.523

76

Millim.

0.378
0.385
0.392
0.399
0.407

0.414
0.421
0.428
0.436
0.443

0.450
0.458
0.465
0.472
0.479

0.487
0.494
0.501
0.508
0.516

0.523
0.530
0.537
0.545
0.552

0.559
0.566
0.574
0.581
0.588

0.596
0.603
0.610
0.617
0.625

0.632
0.639
0.646
0.654
0.661

99°

|

|

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

TEMPERATURE CENTIGRADE.

Height |
of the
Barome !
ter. yo 2° 3° 40 5° & 7 s° 9°
Millim Millim. Millim. Millim. Millim. Millim. Millim. Millim. Millim. Millim.
460 || 0.0742 | 0.1485 | 0.2227 | 0.2970 | 0.371 | 0.445 | 0.520 | 0.594 | 0.668
465 || 0.0750 | 0.1501 | 0.2251 | 0.3002 | 0.375 | 0.450 | 0.525 | 0.600 | 0.675
470 || 0.0759 | 0.1517 | 0.2276 | 0.3034 | 0.379 | 0.455 | 0.531 | 0.607 | 0.683
475 || 0.0767 | 0.1533 | 0.2300 | 0.3066 ] 0.383 | 0.460 | 0.537 | 0.613 | 0.690
480 || 0.0775 | 0.1549 | 0.2324 | 0.3099 | 0.387 | 0.465 | 0.542 | 0.620 | 0.697
485 || 0.0783 | 0.1565 | 0.2348 | 0.3131 | 0.391 | 0.470 | 0.548 | 0.626 | 0.704
490 || 0.0791 | 0.1582 | 0.2373 | 0.3163 | 0.395 | 0.474 | 0.554 | 0.633 | 0.712
495 || 0.0800 | 0.1598 | 0.2397 | 0.3195 | 0.399 | 0.479 | 0.559 | 0.639 | 0.719
1 500 || 0.0807 | 0.1614 | 0.2421 | 0.3228 | 0.403 | 0.484 | 0.565 | 0.646 | 0.726
505 || 0.0815 | 0.1630 | 0.2445 | 0.3260 | 0.407 | 0.489 | 0.570 | 0.652 | 0.734
510 || 0.0823 | 0.1646 | 0.2469 | 0.3293 | 0.412 | 0.494 | 0.576 | 0.658 | 0.741
515 || 0.0831 | 0.1662 | 0.2493 | 0.3325 | 0.416 | 0.499 | 0.582 | 0.665 | 0.748
520 || 0.0839 | 0.1679 | 0.2518 | 0.3357 | 0.420 | 0.504 | 0.587 | 0.671 | 0.755
525 || 0.0847 | 0.1695 | 0.2542 | 0.3389 | 0.424 | 0.508 | 0.593 | 0.678 | 0.763
530 || 0.0855 | 0.1711 | 0.2566 | 0.3422 | 0.428 | 0.513 | 0.599 | 0.684 | 0.770
535 || 0.0863 | 0.1727 | 0.2590 | 0.3454 | 0.432 | 0.518 | 0.604 | 0.691 | 0.777
540 || 0.0872 | 0.1743 | 0.2615 | 0.3486 | 0-436 | 0.523 | 0.610 | 0.697 | 0.784
} 545 || 0.0879 | 0.1759 | 0.2639 | 0.3518 | 0.440 | 0.528 | 0.616 | 0.704 | 0.792
| 550 || 0.0888 | 0.1775 | 0.2663 | 0.3551 | 0.444 | 0.53 0.621 | 0.710 | 0.799
| 555 || 0.0896 | 0.1791 | 0.2687 | 0.3583 | 0.448 | 0.537 | 0.627 | 0.717 | 0.806 |
560 || 0.0904 | 0.1808 | 0.2712 | 0.3615 | 0.452 | 0.542 | 0.633 | 0.723 | 0.813
| 565 || 0.0912 | 0.1824 | 0.2736 | 0.3647 | 0.456 | 0.547 | 0.638 | 0.730 | 0.821
570 || 0.0920 | 0.1840 | 0.2760 | 0.3680 | 0.460 | 0.552 | 0.644 | 0.736 | 0.828
575 || 0.0928 | 0.1856 | 0.2784 | 0.3712 | 0.464 | 0.557 | 0.650 | 0.742 | 0.835
580 || 0.0936 | 0.1872 | 0.2808 | 0.3744 | 0.468 | 0.562 | 0.655 | 0.749 | 0.842
' 585 |] 0.0944 | 0.1888 | 0.2833 | 0.3777 | 0.472 | 0.566 | 0.661 | 0.755 | 0.850
| 590 || 0.0952 | 0.1904 | 0.2857 | 0.3809 | 0.476 | 0.571 | 0.667 | 0.762 | 0.857
595. || 0.0960 | 0.1921 | 0.2881 | 0.3841 | 0.480 | 0.576 | 0.672 | 0.768 | 0.864
600 || 0.0968 | 0.1937 | 0.2905 | 0.3874 | 0.484 | 0.581 | 0.678 | 0.775 | 0.872
605 || 0.0976 | 0.1953 | 0.2929 | 0.3906 | 0.488 | 0.586 | 0.683 | 0.781 | 0.879
| 610 || 0.0985 | 0.1969 | 0.2954 | 0.3938 | 0.492 | 0.591 | 0.689 | 0.788 | 0.886
615 || 0.0993 | 0.1985 | 0.2978 | 0.3970 | 0.496 | 0.595 | 0.695 | 0.794 | 0.893
- 620 || 0.1001 | 0.2001 | 0.3002 | 0.4003 | 0.500 | 0.600 | 0.700 | 0.800 | 0.901
625 || 0.1009 | 0.2017 | 0.3026 | 0.4035 | 0.504 | 0.605 | 0.706 | 0.807 | 0.908
: 630 || 0.1017 | 0.2034 | 0.3050 | 0.4067 | 0.508 | 0.610 | 0.712 | 0.813 | 0.915
|
/ 635 || 0.1025 | 0.2050 | 0.3074 | 0.4099 | 0.512 | 0.615 | 0.717 | 0.820 | 0.922
' 640 || 0.1033 | 0.2066 | 0.3099 | 0.4132 | 0.516 | 0.620 | 0.723 | 0.826 | 0.930
: 645 || 0.1041 | 0.2082 | 0.3123 | 0.4164 | 0.520 | 0.625 | 0.729 | 0.833 | 0.937
- 650 || 0.1049 | 0.2098 | 0.3147 | 0.4196 | 0.524 | 0.629 | 0.734 | 0.839 | 0.944
' 655. || 0.1057 | 0.2114 | 0.3172 | 0.4229 | 0.529 | 0.634 | 0.740 | 0.846 | 0.951
| 660 || 0.1065 | 0.2130 | 0.3196 | 0.4261 | 0.533 | 0.639 | 0.746 | 0.852 | 0.959
i| — pene Se i —— ees SS ——— re
| we | 2° 3° 4° 5° 6 7 s° 9° |
C al

284

Height
of the
Barome-
ter.

Millim.
665
670
675
680
685

690
695
700
705
710

715
720
725
730
735

REDUCTION

ye

Millim.
0.1073
0.1081
0.1089
0.1097
0.1106

0.1114
0.1122
0.1130
0.1138
0.1146

0.1154
0.1162
0.1170
0.1178
0.1186

0.1104
0.1202
0.1210
0.1218
0.1227

0.1235
0.1243
0.1251
0.1259
0.1267

0.1275
0.1283
0.1291
0.1299
0.1307

0.1315
0.1323
0.1331
0.1340
0.1348

0.1356
0.1364
0.1372
0.1380
0.1388

0.1396

Q@0

Millim.
0.2146
0.2163
0.2179

0.2195.

0.2211

0.2227
0.2233
0.2260
0.2276
0.2292

0.2308
0.2324
0.2340
0.2356
0.2372

0.2389
0.2405
0.2421
0.2437
0.2453

0.2469
0.2486
0.2502
0.2518
0.2534

0.2550
0.2566
0.2582
0.2598
0.2615

0.2621
0.2647
0.2653
0.2679
0.2695

0.2712
0.2728
0.2744
0.2760
0.2776

0.2792

OF THE BAROMETER TO THE FREEZING POINT.

3°
Millim.
0.3220
0.3244
0.3268
0.3292
0.3317

0.3341
0.3365
0.3389
0.3414
0.3438

0.3462
0.3486
0.3510
0.3535
0.3559

0.3583
0.3607
0.3631
0.3655
0.3680

0.3704
0.3728
0.3752
0.3777
0.3801

0.3825
0.3849
0.3874
0.3898
0.3922

0.3946
0.3970
0.3994
0.4019
0.4043

0.4067
0.4091
0.4116
0.4140
0.4164

0.4188

TEMPERATURE CENTIGRADE.

Go

Millim.
0.4293
0.4326
0.4358
0.4390
0.4423

0.4455
0.4487
0.4520
0.4552
0.4584

0.4616
0.4648
0.4680
0.4713
0.4745

0.4777
0.4809
0.4842
0.4874
0.4906

0.4939
0.4971
0.5003
0.5036
0.5068

0.5100
0.5132
0.5165
0.5197
0.5230

0.5262
0.5294
0.5326
0.5358
0.5391

0.5423
0.5455
0.5488
0.5520
0.5552

0.5584

3°

Millim.
0.537
0.541
0.545
°0.549
0.553

0.557
0.561
0.565
0.569
0.573

0.577
0.581
0.585
0.589
0.593

0.597
0.601
0.605
0.609
0.613

0.617
0.621
0.625
0.629
0.633

0.637
0.641
0.646
0.650
0.654

0.658
0.662
0.666
0.670
0.674

0.678
0.682
0.686
0.690
0.694

0.698

6°
Millim.
0.644
0.649
0.654
0.658
0.663

0.668
0.673
0.678
0.683
0.688

0.691
0.697
0.702
0.707
0.712

0.717
0.721
0.726
0.731
0.736

0.741
0.746
0.750
0.755
0.760

0.765
0.770
0.775
0.780
0.784

0.789
0.794
0.799
0.804
0.809

0.813
0.818
0.823
0.828
0.833

0.838

6°

we

Millim.

0.751
0.757
0.763
0.768
0.774

0.780
0.785
0.791
0.797
0.802

0.808
0.813
0.819
0.825
0.830

0.836
0.842
0.847
0.853
0.859

0.864
0.870
0.876
0.881
0.888

0.893
0.898
0.904
0.909
0.915

0.921
0.926
0.932
0.938
0.943

0.949
0.955
0.960
0.966
0.972

0.977

7

%&°

Milliin.

0.859
0.865
0.871
0.878
0.884

0.891
0.897
0.904
0.910
0.917

0.923
0.930
0.936
0.943
0.949

0.955
0.962
0.968
0.975
0.981

0.988
0.994
1.001
1.007
1.014

1.020
1.026
1.033
1.039
1.046

1.052
1.059
1.065
1.072
1.078

1.085
1.091
1.097
1.101
1.110

1.117

&°

9°

Millim.

0.966
0.973
0.980
6.988
0.995

1.002
1.010
1.017
1.024
1.031

1.039
1.046
1.053
1.060
1.068

1.075
1.082
1.089
1.097
1.104

1.111
1.118
1.126
1.133
1.140

1.148
1.155
1.162
1.169
VAG

1.184
1.191
1.198
1.206
1.213

1.220
1.227
1.255
1.242
1.249

1.256

9°

——

285

XO.

METRICAL BAROMETER.

TABLE
REDUCING TO THE FREEZING POINT THE BAROMETRICAL
COLUMN,
FASURED BY BRASS SCALES, EXTENDING FROM THE CISTERN TO THE TOP; CALs:
CULATED FOR THE HEIGHTS BETWEEN 605 AND 800 MILLIMETRES, AND FOR

EVERY TENTH OF A DEGREE, FROM 0° TO + AND —35° CENTIGRADE.
By M. T. Harcuens.

i ‘ +m),
- ei ’
7
> ’
y 4
'
Fe
ae 3
% Ly _ i ‘
x i
>.
p= wey
‘ é
b t z
: ey
ee Mr ges As . or ‘
. :
.
Tt
oh é
. {2 | ‘ ae
*
is =
AS Fi
hig: ‘ eS
Bat
‘ oe

’ / ¥ i
F , " nt
r 1
hit ans
‘ = ve ’
f ; ae bel - aa
i) : - oy , nD nee Le
‘ i 7 =

287

T A Biya, XX.

Tuts table has been calculated by using the same coefficients of dilatation as in the
preceding table, viz.
Brass, linear dilatation fala Laplace aud Lavoisier for 100°C. = 0.0018782.
Mercury, dilatation in volume, from Dulong and Petit for 100°C.= 0.0180180.
Dilatation of the mercurial column for 100°C. . 2 ; = 0.0161398.
Dilatation of the mercurial column for 11°C. . : q = 0.0001614.
This table, calculated for the reduction of long series of meteorological observa-
tions, gives immediately the value of the correction for each tenth of a degree up to
35° C. above, and down to 35° C. below, the freezing point, and for mercurial columns
extending from 605 to 800 millimetres.

Examples of Calculation.

Barometer, observed height, . . : . 3 754.17
Temperature of the attached thermometer, +17°.8.

For finding the correction, seek in the horizontal column, headed Larometer, at the
head of the pages, the corresponding height of the barometer ; it will be found, p. 31,
barometer 755" (from 752.50 to 757.50) ; next seek in the first vertical colin,

containing the temperatures, 17°, follow then horizontally this line as far as the col-
umn of 8 tenths, and you find there 2.17 millimetres, which is the correction, or the

quantity to be subtracted for reducing the observed height to zero. We have thus: —
mm

Observed height, ; : . é 754.17
Subtractive correction for +17°. ie = : - —2.17
Barometer at zero, 752.00

\

If the temperature is below zero, the correction will be additive.

mm.
Observed height, : 5 ‘ ‘ . 3 G20 42
Temperature of the attached thermometer, —8°.4.
Additive correction. . : : : : d -+0.99
Barometer at zero, 730.71

288

Centi-
grade
Degrees.

aor WwW ht = oo

ocoaont a

il
12
13
14
15

16
17
18
19
20

XX. REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER: 605™"™ (from 602.51 to 607.50).

Tenths of Degrees.

Millim. | Millim. | Millim. | Millim. | Millim. J Millim. | Millim. | Millim. | Millim. | Millim,
0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09

0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19
0.20 0.21 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28
0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38
0.39 0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48
0.49 0.50 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58

0.59 0.60 0.61 0.62 0.63 0.63 0.64 0.65 0.66 0.67 |
0.68 0.69 0.70 0.71 0.72 0.73 0.74 0.75 0.76 0.77
0.78 0.79 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87
0.88 0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.96 0.97
0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 1.05 1.06

1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16
1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26
1.27 1.28 1.29 1.30 1.31 1.32 1.33 1.34 1.35 1.36
1.37 1.38 1.39 1.40 1.41 1.42 1.43 1.44 1.45 1.46
1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54 1.55 |

1.56 1.57 1.58 1.59 1.60 1.61 1.62 1.63 1.64 1.65
1.66 1.67 1.68 1.69 1.70 1.71 1.72 1.73 1.74 1.75
1.76 1.77 1.78 1.79 1.80 1.81 1.82 1.83 1.84 1.85
1.86 1.87 1.87 1.88 1.89 1.90 1.91 1.92 1.93 1.94
1.95 1.96 1.97 1.98 1.99 2.00 2.01 2.02 2.03 2.04

2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14

2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24

2.25 2.26 ; 2.27 2.28 2.29 2.29 2.30 2.31 2.32 2.33
|

2.34 2.35 2.36 2.37 2.38 2.39 2.40 2.41 2.42 2.43
2.44 2.45 2.46 2.47 2.48 2.49 2.50 2.51 2.52 2.53

2.54 2.553 2.56 2.57 2.58 2.59 2.60 2.61 2.62 2.63
2.64 2.65 2.66 2.67 2.68 2.69 2.70 2.71 2.71 2.72
2.73 2.74 2.75 2.76 2.77 2.78 2.79 2.80 2.81 2.82
2.83 2.84 2.85 2.86 2.87 2.88 2.89 2.90 2.91 2.92
2.93 2.94 2.95 2.96 2.97 2.98 2.99 3.00 3.01 3.02

3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12
3.12 3.13 3.14 315 3.16 3.17 3.18 3.19 3.20 3.21
3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.29 3.30 3.31
3.32 3.33, 3.34 3.39 3.36 3.37 3.38 3.39 3.40 3.4]
3.42, 3.A3 3.44 3.45 3.46 3.47 3.48 3.49 3.50 8.51

— | | | J | | | | _L__

axe ts

cee

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 289

|
BAROMETER: 610"" (from 607.51 to 612.50).
Centi-
grade Tenths of Degrees,
Degrees.

0. | 1 e 2, be 4. de 6. Wie 8. 9.

—— | — | | | |

“Millim. Millim. | Millim. | Millim. | Millim. [| Millim. | Millim, | Millim. | Millim. | Millim,
0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09

oo

0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19
0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29
0.30 0.31 0.32 0.32 0.33 0.34 0.35 0.36 0.37 0.38
0.39" 0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48
0.49 0.50 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58

a fF Wh =

0.59 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68
0.69 0.70 0.71 0.72 0.73 0.74 0.75 0.76 0.77 0.78
0.79 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88
0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.96 0.96 0.97

10 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07
11 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17

conn

12 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27
13 1.28 1.29 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37
14 1.38 1.39 1.40 1.41 1.42 1.43 1.44 1.45 1.46 1.47
15 1.48 1.49 1.50 1.51 1.52 1.53 1.54 1.55 1.56 1.57

16 1.58
17 1.67. |
18 1.77
19 1.87
20 1.97

-59 1.59 1.60 1.61 1.62 1.63 1.64 1.65 1.66
-68 1.69 1.70 1.71 1.72 1.73 1.74 1.75 1.76
78 1.79 1.80 1.81 1.82 1.83 1.84 1.85 1.86
.88 1.89 1.90 1.91 1.92 1.93 1.94.{ 1.95 1.96
98 1.99 2.00 2.01 2.02 2.03 2.04 2.05 2.06

Pm ffl fee

21 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16:
22 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.23 2.24 2.25:
23 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 2.35
24 2.36 2.397 2.38 2.39 2.40 2.41 2.42 2.43 2.44 2.45:
25 2.46 2.47 2.48 2.49 2.50 2.51 2.52 2.53 2.54 2.55:

a

26 2.56 2.57 2.58 2.59 2.60 2.61 2.62 2.63 2.64 2.65:
27 2.66 2.67 2.68 2.69 2.70 2.71 2.72 2.73 2.74 2.75
28 2.76 2.77 2.78 2.79 2.80 2.81 2.82 2.53 2.84 2.85
29 2.86 2.86 2.87 2.88 2.89 2.90 2.91 2.92 2.93 2.94 |
30 2.95 2.96 2.97 2.98 2.99 3.00 3.01 3.02 3.03 3.04

31 3.05 3.06 3.07 3.08 3.09 3.10 3-11 3.12 3.13 3.14
32 3.15 3.16 3-17 3.18 3.19 3.20 3.21 3.22 3.23 3.24
33 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 |
34 3.35 3.36 3.37 3.38 3.39 3.40 3-41 3.42 3.43 3.44 |
35 3.45 3.46 3-47 3.48 3.49 3.50 3.51 3.52 3.59 3.54

290 REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

Ee Eee ny

BAROMETER: 615": (from 612.51 to 617.50).
Centi- =
1} grade Tenths of Degrees.
Nevress
0. i. 2. de 4. 5. 6. Ze 8. 9.
e “Miltim, “Miltim Millim, Milli, Millim, Millim. | Millim, Milli. Millim. | Millim.
0 | 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09
1 0.10 0.41 0.12 | 0.13 0.14 0.15 0.16 0.17 0.18 0.19
2 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 °| 0.28 0.29
3 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39
4 0.40 0.41 0.42 9.43 0.44 0.45 0.46 0.47 0.48 0.49
5 0.50 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58 0.59
6 0.69 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.68
7 0.69 0.70 0.71 0.72 0.73 0.74 0.75 0.76 0.77 0.78
8 0.79 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88
9 0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98

10 0.99 ¥.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08

11 1.09 1.10 1.11 1.12
12 19 1.20 1.21 1.22
13 1.29 1.30 1.31 | 2.32
14 1.39 1.40 y.41 1.42
15 1.49 1.50 lol 1.52

-13 1.14 1.15 1.16 1.17 1.18
.23 1.24 1.25 1.26 1.27 1.28
1.34 1.35 1.36 1.37 1.38
43 1.44 1.45 1.46 1.47 1.48
53 1.54 1.55 1.56 1.57 1.58

eet
eso
eo

1
17 1.69 1.70 1.71 1.72 1.73 1.74 1.75 1.76 1.77 1.78
18 1.79 1.80 1.81 1.82 1.83 1.84 1.85 1.86 1.87 1.88
19 1.89 1.90 1.91 1.92 1.93 1.94 1.95 1.96 1.97 1.98
2.01 2.02 2.03 2.04 2.05 2.06 2.07

16 1.59 1.60 1.61 | 1.62 -63 1.64 1.65 1.66 1.67 1.68
20 1.99 2.00 2.01
21 2.08 2.09 2.10 2.11

22 2.18 2.19 2.20 2.21
23 2.28 2.29 2.30 2.31
24 2.38 2.39 2.40 2.41
25 2.48 2.49 2.50 z.51

12 2.13 2.14 2.15 2.16 2.17
22 2.23 2.24 2.25 2.26 2.27
2.33 2.34 2.35 2.36 2.37
42 2.43 2.44 2.45 2.46 2.47

2 2.53 2.54 2.55 2.56 2.57

prryenwy wv
w
bo

26 2.58 2.59 2.60 2.61 2.62 2.63 2.64 2.65 2.66 2.67
27 2.68 2.69 2.70 2 ail 2.72 2.73 2.74 2.75 2.76 2.77
28 2.78 2.79 2.80 2.81 2.82 2.83 2.84 2.85 2.86 2.87
29 2.88 2.89 2.90 2.91 2.92 2.93 2.94 2.95 2.96 2.97
30 2.98 2.99 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07

31 3.08 3.09 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17
32 3.18 3.19 3.20 3.21 3.22 3.23 3.24 3-25 3.26 3.27
33 3.28 3.29 3.30 8.31 3.32 3.33 | 3.34 3.35 3.36 3.36
34 3.37 3.38 3.39 3.40 3.41 3.42 3-43 3.44 3.45 5.46
35 3.47 3.48 3.49 3.50 3.51 3.52 3.53 3.54 3.55 3.56

0. 1. 2. 3. 4. 3. 6. a 8. 9.

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 291

BAROMETER: 620" (from 617.51 to 622.50)

Centi-
grade Tenths of Degrees.

Degrees.

oe || we 2, 3. ae ll 58) e&@ | x Ss. 9.

° Millim. Millim. | Milli. | Millim. Millim. | Millim. | Millim, | Millim. | Millim Millim.
0 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09

'
0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19
0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29

|
|

1

2

3 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39
4 0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 0.49
5 0.50 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58 0.59
6 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69
7 0.70 0.71 0.72 0.73 0.74 0.75 0.76 0.77 0.78 0.79
8 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88 0.89
9 0.90 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99
10 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09

11 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19
12 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29
13 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39
14 1.40 1.41 1.42 1.43 1.44 1.45 1.46 1.47 1.48 1.49
15 1.50 1.51 1.52 1.53 1.54 1.55 1.56 1.57 1.58 1.59

16: 1.60 1.61 1.62 1.63 1.64 1.65 1.66 1.67 1.68 1.69
17 1.70 1.71 1.72 1.73 1.74 1.75 1.76 1.77 1.78 1.79
18 1.80 1.81 1.82 1.83 1.84 1.85 1.86 1.87 1.88 1.89
19 1.90 1.91 1.92 1.93 1.94 1.95 1.96 1.97 1.98 1.99
20 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09

21 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19
22 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29
23 2.30 2.31 2.32 2.33 2.34 2.35 2.36 2.37 2.38 2.39
24 2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49
25 2.50 2.51 2.52 2.53 2.54 2.55

2.56 2.57 2.58 {| 2-59

26 2.60 2.61 2.62 2.63 2.64 2.65 2.66 2.67 2.68 2.69
27 2.70 2.71 2.72 2.73 2.74 2.75 2.76 2.77 2.78 2.79
28 2.80 2.81 2.82 2.83 2.84 2.85 2.86 2.87 2.88 2.89
29 2.90 2.91 2.92 2.93 2.94 2.95 2.96 2.97 2.98 2.99
30 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09

31 3.10 3-11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19
32 3.20 3.21 3.22 3.23 3.24 3.25 3.26 3.27 8.28 3.29
33 3.30 3.31 3.32 3.33 3.34 3.35 3.36 3.37 3.38 3.39
34 3.40 3.41 3.42 3.43 3.44 3.45 3.46 3.47 3.48 3.49
35 3.50 3.51 3.52 3.53 3.54 3.55 3.56 | 3.57 3.58 3.59

0. 1. 2 | 8. a. 5. 6. | ". s. 9. |

202,

oo

aor wh =

ocomantn

10

il
12

14
15

16
17
18
19
26

21
22
23
24
25

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

0.

BAROMETER: 625™™ (from 622.51 to 627.50).

“Milli.
0.00

0.10
0.20
0.30
0.40
0.50

0.61
0.71
0.81
0.91
1.01

1.11
1.21
1.31
1.41
1.51

1.61
1.71
1.82
1.92
2.02

2.12
2.22
2.32
2.42
2.52

2.62
2.72
2.82
2.93
3.03

3.13
3.23
3.33
3.43

1.

Millim.

0.01

0.11
0.21
0.31
0.41
0.51

0.62
0.72
0.82
0.92
1.02

1.12
1.22
1.32
1.42
1.52

1.62
1.73
1.83
1.93

2.

Millim.

0.02

0.12
0.22
0.32
0.42
0.52

0.63
0.73
0.83
0.93
1.03

1.13
1.23
1.33
1.43
1.53

1.63
1.74
1.84
1.94
2.04

2.14
2.24
2.34
2.44
2.54

2.64
2.74
2.84
2.95
3.05

3.15
3.25
3.35
3.45

Millim. | Millim.,
0.03 0.04
0.13 0.14
0.23 0.24
0.33 0.34
0.43 0.44
0.53 0.54
0.64 0.65
0.74 0.75
0.84 0.85
0.94 0.95
1.04 1.05
1.14 1.15
1.24 1.25
1.34 1.35
1.44 1.45
1.54 1.55
1.64 1.65
1.75 1.76
1.85 1.86
1.95 1.96.
2.05 2.06
2.15 2.16
2.25 2.26
2.35 2.36
2.45 2.46
2500) 2.56
2.65 2.66
2.75 2.76
2.85 2.87
2.96 2.97
3.06 3.07
3.16 3.17
3.26 3.27
3.36 3.07
3.46 3.47
3.56 DO

3. 4.

Tenths of Degrees.

Millim.

0.05

0.15
0.25
0.35
0.45
0.55

0.66
0.76
0.86
0.96
1.06

1.16
1.26
1.36
1.46
1.56

1.66
1.77
1.87
1.97
2.07

2.17
2.27
2.37
2.47
2.57

2.67
2.77

5s

illim,

-06

o

0.26
0.36
0.46
0.56

0.67
0.77
0.87
0.97
1.07

LL
1.27
1.37
1.47
1.57

1.67
1.78
1.88
1.98
2.08

2.18
2.28
2.38
2.48
2.58

2.68
2.78
2.89
2.99
3.09

3.19
3.29
3.39
3.49
3.59

".

Millim.
0.07

0.17
0.27
0.37
0.47
0.58

0.68
0.78
0.88
0.98
1.08

1.18
- 1.28
1.38
1.48
1.58

1.68
1.79
1.89
1.99
2.09

2.19
2.29
2.39
2.49
2.59

2.69
2.79
2.90
3.00
3.10

3.20
3.30
3.40
3.50
3.60 |

8.

Millim
0.08

0.18
0.28
0.38
0.48
0.59

0.69
0.79
0.89
0.99
1.09

1.19
1.29
1.39
1.49
1.59

1.69
1.80
1.90
2.00
2.10

2.20
2.30
2.40
2.50
2.60

2.70
2.80
2.91
3.01
3.11

3.21
3.31
3.41
3.51
3.61

9.

Millim,
0.09

0.19
0.29
0.39
0.49
0.60

0.70
0.80
0.90
1.00
1.10

1.20
1.30
1.40
1.50
1.60

1.70
1.81
1.91
2.01
2.11

2.21
2.31
2.41
2.51
2.61

2.71
2.51
2.92
3.02
3.12

3.22
3.32
3.42
3.52
3.62

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 293

BAROMETER: 630" (from 627.51 to 632.50).

Centi-
grade Tenths of Degrees.
Degrees.
0. 1. 2, de 4. 6. Qe &. 9.
e ° “Millim. Millim. | Millim. | Millim. | Millim. [| Millim. | Millim. | Millim. | Millim. Millim.
0 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09
1 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19
2 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29
3 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40
4 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 0.49 0.50
5 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58 0.59 0.60
6 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.70
7 0.71 0.72 0.73 0.74 0.75 0.76 0.77 0.78 0.79 0.80
8 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.90
9 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.00 1.01

10 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.1]

11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21
12 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.30 1.31
13 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 1.41
14 1.42 1.43 1.44 1.45 1.46 1.47 1.48 1.49 1.50 1.52
15 1.53 1.54 1.55 1.56 1.57 1.58 1.59 1.60 1.61 1.62

16 1.63 1.64 1.65 1.66 1.67 1.68 1.69 1.70 1.71 1.72
17 1.73 1.74 1.75 1.76 1.77 1.78 1.79 1.80 1.81 1.82
18 1.83 1.84 1.85 1.86 1.87 1.88 1.89 1.90 1.91 1.92
19 1.93 1.94 1.95 1.96 1.97 1.98 1.99 2.00 2.01 2.02
20 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.13

21 ora } Das | G6 | Oar | Bae 219° | 2:20 | 2221 2.22 | 2.28
22 bog | Blas | BiG | 2teF ff oie8 2.29 | 2.30 | 2.31 9:92 |) 2538
23 oisd | Bigs «| B86 | Gis? | iss 2:39 | 2.40 | 2.41 2.42 | 2:48
24 2.44 2.45 2.46 DUT 2.48 2.49 2.50 2.51 2.52 2.58 |i
25 2.54 | 2.55 | 2.56 | 2.57 | 2.58 2.59 | 2.60 | 2.61 2.62 | 2.63

26 2.64 2.65 2.66 2.67 2.68 2.69 2.70 2.71 2.73 2.74
27 2.75 2.76 2.77 2.78 2.79 2.80 2.81 2.82 2.83 2.84
28 2.85 2.86 2.87 2.88 2.89 2.90 2.91 2.92 2.93 2.94
29 2.95 2.96 2.97 2.98 2.99 3.00 3.01 3.02 3.03 3.04
30 3.05 3.06 3.07 3.08 3.09 «| 3.10 3.11 3.12 3.13 3.14

31 3.15 3.16 3.17 3.18 3.19 3.20 3.21 3.22 3.23 3.24
32 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.34 3.35
33 3.36 3.37 3.38 3.39 3.40 3.41 3.42 3.43 3.44 3.45
34 3.46 3.47 3.48 3.49 3.50 3.51 3.52 3.53 3.54 3.55
| 35 3.56 3.57 3-58 3.59 3.60 3.61 3.62 3.63 3.64 3.65

0. 1. 2, 3. -_) ae es %. s. | 9.

294

Centi-
grade
Degrees.

so

oOo fF WhO =

omst

REDUCTION OF TILE BAROMETER TO THE FREEZING POINT.

BAROMETER: 635" (from 632.51 to 637.50),

0.

Millim.

0.00

0.10
0.20
0.31
0.41
0.51

0.61
0.72
0.82
0.92
1.02

1.13
1.23
1.33
1.43
1.54

1.64
1.74
1.84
1.95
2.05

2.15
2.25
2.36
2.46
2.56

2.66
2.77
2.87
2.97
3.07

3.18
3.28
3.38
3.48
3.59

0.

1.

Millim.

0.01

0.11
0.22
0.32
0.42
0.52

0.63
0.73
0.85
0.93
1.04

1.14
1.24
1.34
1.45
1.55

1.65
1.75
1.86
1.96
2.06

2.16
2.27
2.37
2.47
2.57

2.67
2.78
2.88
2.98
3.08

3.19
3.29
3.39
3.49
3.60

1.

Millim,

0.02

0.12
0.23
0.33
0.43
0.53

0.64
0.74
0.84
0.94
1.05

1.15
1.25
1.35
1.46
1.56

1.66
1.76
1.87
1.97
2.07

2.17
2.28
2.38
2.48
2.58

2.69
2.79
2.89
2.99
3.10

3.20
3.30
3.40
3.51
3.61

2.

Millim.

0.03

0.13
0.24
0.34
0.44
0.54

0.65
0.75
0.85
0.95
1.06

1.16
1.26
1.36
1.47
1.57

1.67
1.77
1.88
1.98
2.08

2.18
2.29
2.39
2.49
2.59

2.70
2.80
2.90
3.00
3.11

Tenths of Degrees.

Millim.

0.04

0.14
0.25

1.07

1.17
1.27
1.37
1.48
1.58

1.68
1.78
1.89
199
2.09

2.19
2.30
2.40
2.50
2.60

2.71
2.81
2.91
3.01
3.12

Millim.

0.05

0.15
0.26
0.36
0.46
0.56

0.67
0.77
0.87
0.97
1.08

1.18
1.28
1.38
1.49
1.59

1.69
1.79
1.90
2.00
2.10
2.20
2.31
2.41
2.51
2.61

2.72
2.82
2.92
3.02
3.13

Millim.

0.06

0.16
0.27
0.37
0.47
0.57

0.68
0.78
0.88
0.98
1.09

1.19
1.29
1.39
1.50
1.60

1.70
1.80
12911
2.01
2.11

2.21
2.32
2.42
2.52
2.62

2.73
2.83
2.93
3.03
3.14

3.24
3.34
3.44
3.55
3.65

Millim.

0.07

0.17
0.28
0.38
0.48
0.58

0.69
0.79
0.89
0.99
1.10

1.20
1.30
1.40
1.51
1.61

1.71
1.81
1.92
2.02
2.12

2.22
2.33
2.43
2.53
2.63

2.74
2.84
2.94
3.04
3.15

3.25
3.35
3.45
3.56
3.66

Millim.

0.08

0.18
0.29
0.39
0.49
0.59

0.70
0.80
0.90
1.00
1.11

1.21
1.31
1.41
1.52
1.62

1.72
1.82
1.93
2.03
2.13

2.23
2.34
2.44
2.54
2.64

2.75
2.85
2.95

Millim.

0.09

0.19
0.30
0.40
0.50
0.60

0.71
0.81
0.91
1.01
1.12

1.22
1.32
1.42
1.53
1.63

1.73
1.83
1.94
2.04
2.14

2.24
2.35
2.45
2.55
2.65

2.76
2.86
2.96
3.06
3.17

3.27
3.37
3.47
3.58

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 295

BAROMETER: 640" (from 637.51 to 642.50).

12 1.24 1.25
15 1.34 1.35
14 1.45 1.46
15 1.55 1.56

1.26 1.27 1.28 1.29 1.30 1.31 1.32 1.33
1.36 1.37 1.38 1.39 1.40 1.42 1.43 1.44
1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54
1.57 1.58 1.59 1.60 1.61 1.62 1.63 1.64

Centi-

grade Tenths of Degrees.

Degrees.

: 1
e. || a. )) @. || | i Ge. 1) S| | Re

° Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Mittin. |j
0 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09
1 0.10 0.11 0.12 0.13 0.14 0.15 0.17 0.18 0.19 0.20
2 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30
3 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40
4 0.41 0.42 0.43 0.44 0.45 0.46 0.48 0.49 0.50 0.51

5 || 0.52 | 0.53 | 0.54 | 0.55 | 0.56 | 0.57 | 0.58 | 0.59 | 0.60 | 0.61 |
6 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.70 0.71
7 0.72 0.73 0.74 0.75 0.76 0.77 0.78 0.80 0.81 0.82
8 0.83 0.84 0.85 0.86 0.87 0.88 | 0.89 0.90 0.91 0.92 |
9 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.00 1.01 1.02
10 1.03 1.04

16 1.65 1.66
17 1.76 1.77
18 1.86 1.87
19 1.96 LOT
20 2.07 2.08

1.67 1.68 1.69 1.70 1.71 1.72 1.74 1.75
1.78 1.79 1.80 1.81 1.82 1.83 1.84 1.85
1.88 1.89 1.90 ee 1.92 1.93 1.94 1.95
1.98 1.99 2.00 2.01 2.02 2.03 2.05 2.06
2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16

21 2.17 2.18
22 2.27 2.28
23 2.38 2.39
24 2.48 2.49
25 2.58 2.59

2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26
2.29 2.30 2.31 2.32 2.33 2.34 2:86. | 2:37
2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47
2.50 2.51 2.52 2.53 2.54 2.55 2.56 2.57
2.60 2.61 2.62 2.63 2.64 2.65 2.66 2.68

26 2.69 2.70
27 2.79 2.80
28 2.89 2.90
29 3.00 3.01
30 3.10 3.11

2.71 2.72 2.73 2.74 2.75 2.76 2.77 2.78
2.81 2.82 2.83 2.84 2.85 2.86 2.87 2.88
2.91 2.92 2.93 2.94 295 2.96 2.97 2.99
3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09
3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

31 3.20 3.21
32 3.31 3.32
33 3.41 3.42
34 3.51 3.52
35 3.62 3.63

3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.30
3.33 3.54 3.35 3.36 3.37 3.38 3.39 3.40
3.43 3.44 3.45 3.46 3.47 3.48 3.49 3.50
3.53 3.54 3.55 3.56 3.57, 3.58 3.59 3.60
3.64 3.65 3.66 3.67 3.68 3.69 3.70 3.71 |

1.05 1.06 1.07 1.08 1.09 1.11 1.12 1.13
il 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23

| 2. | 3 1 el ee % 8. 9.

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

296

|

| Centi-

grade

Degrees.

0. | 1. ope de

|
° Millim. | Millim. | Millim, | Millim,
0 0.00 | 0.01 0.02 0.03
1 0.10 | 0.11 0.12 0.14
2 0.21 0.22 0.23 0.24
3 0.31 0.32 0.33 0.34
4 0.42 0.43 0.44 0.45
5 0.52 0.53 0.54 0.55
6 0.62 0.64 0.65 0.66
7 0.73 0.74 0.75 0.76
8 0.83 0.84 0.85 0.86
9 0.94 0.95 0.96 0.97
10 1.04 1.05 1.06 1.07
11 1.15 1.16 1.17 1.18
12 1.25 1.26 1.27 1.28
13 1.35 1.36 1.37 1.38
14 1.46 1.47 1.48 1.49
15 1.56 1.57 1.58 1.59
16 1.67 1.68 1.69 1.70
17 127 1.78 1.79 1.80
18 1.87 1.88 1.89 1.91
19 1.98 1.99 2.00 2.01
20 2.08 2.09 2.10 2.11
21 2.19 2.20 2.21 2.22
22 2.29 2.30 2.31 2.32
23 2.39 2.40 2142 2.43
24 2.50 2.51 2.52 2.53
25 2.60 2.61 2.62 2.63
26 a7 2.72 2.73 2.74
27 Sal 2.82 2.83 2.84
2° 5.3: 2.93 2.94 2.95
29 3.02 3.03 3.04 3.05

| 30 3.12 3.13 3.14 3.15

|

| 31 3.23 3.24 3.25 3.26

1 32 3.33 3.34 3.35 3.36

i 33 3.44 3.45 3.46 3.47

i 34 B5L || 3.55: |, 3:56 |) S57

1 35 R64 | 3.65 | 3:66 | 3:67

|

i 0. 1. 2.

BAROMETER: 645" (from 642.51 to 647.50).

Tenths of Degrees.

4. 3d.
Millim. # Mitlim.
0.04 0.05
0.15 0.16
0.25 0.26
0.35 0.36
0.46 0.47
0.56 0.57
0.67 0.68
0.77 0.78
0.87 0.88
0.98 0.99
1.08 1.09
1.19 1.20
1.29 1.30
1.39 1.41
1.50 1.51
1.60 1.61
1.71 1.72
1.81 1.82
1.92 1.93
2.02 2.03
2.12 2.13
2.23 2.24
2000 2.34
2.44 2.45
2.04 2.95
2.64 2.65
2.75 2.76
2.85 2.86
2.96 2.97
3.06 3.07
3.16 3.18
3.27 3.28
3.37 3.38
3.48 3.49
3.58 3.59
3.68 3.69

6.

Millim.

0.06

0.17
0.27
0.37
0.48
0.58

0.69
0.79
0.90
1.00
1.10

1.2]
1.31
1.42
1.52
1.62

1.73
1.83
1.94
2.04
2.14

2.25
2.35
2.46
2.56
2.66

2.77
2.87
2.98
3.08
3.19

Ze

Millim. | Millim.

0.07

0.18
0.28
0.39
0.49
0.59

0.70
0.80
0.91
1.01
1.11

1.22
1.32
1.43
1.53
1.63

1.74
1.84
1.95
2.05
2.15

2.26
2.36
2.47
2.57
2.67

&.

0.08

0.19
0.29
0.40
0.50
0.60

0.71
0.81
0.92
1.02
1.12

1.23
1.33
1.44
1.54
1.64

1.75
1.85
1.96
2.06
2.17

2.27
2.37
2.48
2.58
2.69

9.

Millim.

0.09

0.20
0.50
0.41
0.51
0.61

0.72
0.82
0.93
1.03
1.13

1.24
1.34
1.45
1.55
1.66

1.76
1.86
1.97
2.07
2.18

2.28
2.38
2.49
2.59
2.70

2.80
2.90
3.01
3.11
3.22

3.32
3.42
3.53
3.63
3.73

« Centi-
‘grade Tenths of Degrees.
: Degrees.
0. ke 2. Se 4. de 6. i _
6) Millim. Millim. Millim “Millim. Millim. Millim. Millim, | Millim. | Millim.
0 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08
|
1 011 ().12 0.13 0.14 0.15 0.16 0.17 0.18 0.19
2 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29
3 0.32 0.33 0.34 | 0.35 0.36 | 0.37 0.38 0.39 | 0.40
| 4 0.42 0.43 0.44 0.45 0.46 0.47 0.48 0.49 0.50
5 0.53 0.54 0.55 0.56 0.57 0.58 0.59 0.60 0.61
6 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.70 0.71
7 0.73 0.75 0.76 0.77 0.78 0.79 0.80 - 0.81 0.82
8 0.84 0.85 0.86 0.87 0.88 0.89 0.90 0.91 0.92
9 0.94 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03
10 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1t2 1.13
1l 15 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24
12 1.26 1.27 1.28 1.29 1.30 1.31 1.32 1.33 1.34
13 1.36 1.37 1.39 1.40 1.41 1.42 1.43 1.44 1.45
14 1.47 1.48 1.49 1.50 1.51 1.52 1353 1.54 1.55
15 1.57 1.58 1.60 1.61 1.62 1.63 1.64 1.65 1.66
16 1.68 1.69 1.70 1.71 1.72 1.73 1.74 1.75 1.76
17 1.78 1.79 1.81 1.82 1.83 1.84 1.85 1.86 1.87
18 1.89 1.90 1.91 1.92 1.93 1.94 1.95 1.96 1.97
19 1.99 2.00 2.01 2.03 2.04 2.05 2.06 2.07 2.08
20 2.10 Qa 2.12 2.13 2.14 2.15 2.16 2.17 2.18
21 2.20 raed 22? 2.24 2.25 2.26 27 2.28 2.29
ee et 2.31 Dron Zoo 2.34 2.35 | 2.36 2eon 2.38 2.39
23 2.41 2.42 2.43 2.44 2.46 2.47 2.48 2.49 2.50
24 2.52 2.53 2.54 Dee 2.56 2.57 2.58 2.59 2.60
25 2.62 2.63 2.64 2.65 2.67 2.68 2.69 2.70 2.71
26 2.73 2.84 2.75 2.76 Zettel 2.78 2.79 2.80 2.81
ot 2.83 2.84 2.85 2.86 2.88 2.89 2-90 2.91 2.92
7 28 2.94 2.95 2.96 2.97 2.98 2.99 3.00 3.01 3-02
29 3.04 3.05 3.06 3.07 3.08 3.10 3-11 Sel2 3-13
30 3.15 3.16 3.17 3.18 3.19 3.20 3.21 O22 ° 3.23
a1 D2 3.26 3.27 3.28 3-29 3.31 Son 3.33 3-34
| 3. 3.36 337 3.38 3.39 3.40 3.41 3.42 3.43 3.44
| 33 3.46 3.47 3.48 3.49 3.50 3-52 3.53 3.54 3.55
34 3.57 3 58 3.59 3.60 3.61 3.62 3.63 3.64 3.65
35 3.67 3.68 3-69 3.70 ea elie 3.74 3.75 3.76
| 0. 1. os B 5 4. 3. 6. QT 8.
G | 91

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER: 650"™ (from 647.51 to 652.50).

297

9.

Millim,
0.09

0.20
0.30
0.41
0.51
0.62

0.72
0.83
0.93
1.04
1.14

1.25
1.35
1.46
1.56
1.67

1.77
1.88
1.98
2.09
2.19

2.30
2.40
2.51
2.61
2.72

2 82
2.93
3.03
3.14
3.24

3.35
3.45
3.56
3-66
3.77

9.

298 REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER: 655"™ (from 652.51 to 657.50).
(
Centi- y
grade Tenths of Degrees.
Degrees.
0. 1. 2. Be 4. De 6. Ze 8. 9.

O° Millim. | Millim. | Millim. Millim. Millim., Milli. Millim, Millim. Millim, Millim.

0 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.09 0.10

1

2 0.21 0.22 0.23 0.24 0.25 0.26 0.28 0.29 0.30 0.31

3 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.41

4 0.42 0.43 0.44 0.46 0.47 0.48 0.49 0.50 0.51 0.52

5 0.53 0.54 0.55 0.56 0.57 0.58 0.59 0.60 0.61 0.62

6 0.63 0.65 0.66 0.67 0.68 0.69 0.70 0.71 0.72 0.73

7 0.74 0.75 0.76 0.77 0.78 0.79 0.80 0.81 0.83 0.84

8 0.85 0.86 0.87 0.88 0.89 0.90 0.91 0.92 0.93 0.94

9 0.95 0.96 0.97 0.98 0.99 1.00 1.02 1.03 1.04 1.05

10 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15
11 1.16 1.17 1.18
12 1.27 1.28 1.29
13 1.37 1.39 1.40
14 1.48 1.49 1.50
15 1.59 1.60 1.61

1.20 1.21 1.22 1.23 1.24 1.25 1.26
1.30 1.31 1.32 1.33 1.34 1.35 1.36
1.41 1.42 1.43 1.44 1.45 1.46 1.47
1.51 1.52 1.53 1.54 1.55 1.57 1.58
1.62 1.63 1.64 1.65 1.66 1.67 1.68

16 1.69 1.70 1.71
17 1.80 1.81 1.82
18 1.90 1.91 1.92
19 || 2.01 2.02 2.03
20. || 2.11 2.13 2.14

1.72 1.73 1.74 1.76 1.77 1.78 1.79
1.83 1.84 1.85 1.86 1.87 1.88 1.89
1.94 1.95 1.96 1.97 1.98 1.99 2.00
2.04 2.05 2.06 2.07 2.08 2.09 2.10
2.15 2.16 2.17 2.18 2.19 2.20 2.21

21 2.22 2.23 2.24
22 2.33 2.34 2.35
23 2.43 2.44 2.45
24 2.54 2.55 2.56
25 2.64 2.65 2.66

2.25 2.26 2.27 2.28 2.29 2.31 2.32
2.36 2.37 2.38 2.39 2.41 2.41 2.42
2.46 2.47 2.48 2.50 2.51 2.52 2.53
2.57 2.58 2.59 2.60 2.61 2.62 2.63
2.68 2.69 2.70 2.71 2.72 2.73 2.74

26 2.75 2.76 2.77
27 2.85 2.87 2.88
28 2.96 2.97 2.98
29 3.07 3.08 3.09
30 3.17 3.18 3.19

2.78 2.79 2.80 2.81 2.82 2.83 2.84
2.89 2.90 2.91 2.92 2.93 2.94 2.95
2.99 3.00 3.01 3.02 3.03 3.05 3.06
3.10 3.11 3.12 3.13 3.14 3.15 3.16
3.20 3.21 3.22 3.24 3.25 3.26 3.27

3.31 3.32 3.33 3.34 3.35 3.36 3.37
3.42 3.43 3.44 3.45 3.46 3.47 3.48
3.52 3.53 3.54 3.95 3.56 3.57 3.58
3.63 3.64 3.65 3.66 3.67 3.68 3.69
3.73 3.74 3.75 3.76 3.77 3.79 3.80

| 31 3.28 3.29 3.30
32 3.38 3.39 3.40
33 3.49 3.50 3.51

34 3.59 3.61 3.62

35 3.70 3.71 3.72

|| — —$— er

0. 1. 2.

ee eee ee ee a

0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.20

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 299

BAROMETER: 660"™ (from 657.51 to 662.50).

Tenths of Degrees,

0. 1. 2. de 4. de 6. 7 8. 9.

Millim, | Millim. | Millim, | Millim. | Millim } Millim. | Millim. | Millim. | Millim. | Millim,
0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.08 0.09 0.10

0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.20
0.21 0.22 0.23 0.25 0.26 0.27 0.28 0.29 0.30 0.31
0.32 0.33 0.34 0.35 0.36 9.37 0.38 0.39 0.41 0.42
0.43 0.44 0.45 0.46 0.47 0.48 0.49 0.50 0.51 0.52
0.53 0.54 0.55 0.57 0.58 0.59 0.60 0.61 0.62 0.63

0.64 0.65 0.66 0.67 0.68 0.69 0.70 0.71 0.72 0.74
0.75 0.76 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.84
0.85 0.86 0.87 0.88 0.90 0.91 0.92 0.93 0.94 0.95
0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.06
1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16

1.17 1.18 1.19 1.20 1.21 1.23 1.24 1.25 1.26 1.27
1.28 1.29 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37
1.39 1.40 1.41 1.42 1.43 1.44 1.45 1.46 1.47 1.48
1.49 1.50 1.51 1.52 1.53 1.55 1.56 1.57 1.58 1.59
1.60 1.61 1.62 1.63 1.64 1.65 1.66 1.67 1.68 1.69

1.70 1.72 1.73 1.74 1.75 1.76 1.77 1.78 1.79 1.80
1.81 1.82 1.83 1.84 1.85 1.86 1.88 1.89 1.90 1.91
1.92 1.93 1.94 1.95 1.96 1.97 1.98 1.99 2.00 2.01
2.02 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12
2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.21 2.22, 2.23

2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33
2.34 2.35 2.37 2.38 2.39 2.40 2.41 2.42 2.43 2.44
2.45 2.46 2.47 2.48 2.49 2.50 2.51 2.53 2.54 2.55 |!
2.56 2.57 2.58 2.59 2.60 2.61 2.62 2.63 2.64 2.65

2.66 2.67 2.68 2.70 2.71 2.72 2.73 2.74 2.75 2.76 |

2.77 2.78 2.79 2.80 2.81 2.82 2.83 2.84 2.86 2.87
2.88 2.89 2.90 2.91 2.92 2.93 2.94 2.95 2.96 2.97
2.98 2.99 3.00 3.02 3.03 3.04 3.05 3.06 3.07 3.08
3.09 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.19
3.20 3.21 3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.29

3.41. | 3.42, | 9.43, | 3.44, |) 3.45, | 3.46 | 8.47 | 8.48 || 3.49. | 3.54
3.52 | 3.53 | 3.54 | 3.55 | 3.56 | 3.57 | 3.58 | 3.59 | 3.60 | 3.61
3.62 | 3.63 | 3.64 | 3.65 | 3.66 | 3.68 | 3.69 | 3.70 | 3.71 | 3.72
3.73 | 3.74 | 3.75 | 3.76 | 3.77 | 3.78 | 3.79 | 3.80 | 3.81 | 3.92 |

|
3.30 3-31 3.32 3.33 3.35 3.36 3.37 3.38 3.39 3.40

1. 2. 3. 4. de 6. Ze 8. 9.

800 REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

Centi-
grade
Degrees.

o Millim.
0 0.00
1 011
2 0.22
3 0.32
4 0.43
5 0.54
6 0.64
7 0.75
| 8 0.86
j23 0.97
10 ;| 1.07
aa 1.18
12 1.29
13 1.40
14 1.50
15 1.61
| 46 1.72
17 1.83
18 1.93
19 2.04
20 2.15
21 2.25
22 2.36
23 2.47
| 24 2.58
25 2.68
26 2.79
27 2.90
| 28 3.01
i] 29 Sat
| 30 3.22
31 3.33
32 3.44
| 33 3.54
| 34 3.65
| 35 3.76
a
| 0.

BAROMETER: 665™™ (from 662.51 to 667.50).

Millim.
0.01

0.12
0.23
0.33
0-44
0.55

0.66
0.76
0.87
0.98
1.08

1.19
1.30
1.41
1.51
1.62

1.73
1.84
1.94
2.05
2.16

2.27
2.37
2.48
2.59
2.69

2.80
2.91
3.02
3.12
3.23

3.34
3.45
3.55
3.66
3.77

1.

Tenths of Degrees.

Millim.

0.02

0.13
0.24
0.34
0.45
0.56

0.67
0.77
0.88
0.99
1.20

1.20
1.31
1.42
1.52
1.63

1.74
1.85
1.95
2.06
2.17

2.28
2.38
2.49
2.60
2-71

2.81
2.92
3.03
3.13
3.24

3-35
3.46
3.56
3.67
3-78

Millim.

0.03

0.14
0.25
0.35
0.46
0.57

0.68
0.78
0.89
1.00
1.11

1.21
1.32
1.43
1.54
1.64

1.75
1.86
1.96
2.07
2.18

2.29
2.39
2.50
2.61
2.72

2.82
2.93
3.04
3.15
3.25

3.36
3.47
3.57
3.68
3.79

De

Millim.

0.04

0.15
0.26
0.37
0.47
0.58

0.69
0.79
0.90
1.01
1.12

1.22
1.33
1.44
1.55
1.65

1.76
1.87
1.98
2.08
2.19

2.30
2.40
2.51
2.62
2.73

2.83
2.94
3.05
3.16
3.26

3.37
3.48
3.59
3.69
3.8U

4.

Millim.

0.05

0.16
0.27
0.38
0.48
0.59

0.70
0.81
0.91
1.02
1.13

1.23
1.34
1.45
1.56
1.66

1.77
1.88
1.99
2.09
2.20

2.31
2.42
2.52
2.63
2.74

2.84
2.95
3.06
3.17
3.27

3.38
3.49
3.60
3.70
3.81

5.

Millim.

0.06

0.17
0.28
0.39
0.49
0.60

0.71
0.82
0.92
1.03
1.14

1.25
1.35
1.46
1.57
1.67

1.78
1.89
2.00

2.10"

2.21

2.32
2.43
2.53
2.64
2.75

2.86
2.96
3.07
3.18
3.28

3.39
3.50
3.61
3.71
3.82

6.

Millim.

0.08

0.18,

0.29
0.40
0.51
0.61

0.72
0.83
0.93
1.04
1.15

1.26
1.36
1.47
1.58
1.69

1.79
1.90
2.01
2.11
2.22

2.33
2.44
2.54
2.65
2.76

2.87
2.97
3.08
3.19
3.30

3.40
3.51
3.62
3.72
3.83

Ze

Millim.

0.09

0.19
0.30
0.41
0.52
0.62

0.73
0.84
0.95
1.05
1.16

1.27
1.37
1.48
1.59
1.70

1.80
1.91
2.02
2.13
2.23

2.34
2.45
2.56
2.66
2.77

2.88
2.98
3.09
3.20
3.31

3-41
3.52
3.63
3.74
3.84

Millim.

0.10

0.20
0.31
0.42
0.53
0.63

0.74
0.85
0.96
1.06
1.17

1.28
1.39
1.49
1.60
1.71

1.81
1.92
2.03
2.14
2.24

2.35
2.46
2.57
2.67
2.78

2.89
3.00
3.10
5.21
3.32

3.42
3.53
3.64
3-75
3.83

9.

Se

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. o0L

BAROMETER: 670" (from 667.51 to 672.50.)

Centi-
grade Tenths of Degrees.
Degrees. :

0. 1. 2. de 4. de 6. Ze 8. 9.

° Millim. | Millim, | Millim. | Millim, | Millim. | Millim. | Millim. | Millim. | Millim. | Millim.
0 0.00 0.01 0.02 0.03 0.04 0.05 0.07 0.08 0.09 0.10

1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.20 0.21
2 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30 0.31
3 0.32 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42
4 0.43 0.44 0.45 0.47 0.48 0.49 0.50 0.51 0.52 0.53
5 0.54 0.55 0.56 0.57 0.58 0.60 0.61 0.62 0.63 0.64

6

u 0.76 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.84 0.85
8 0.87 0.88 0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.96
9 0.97 0.98 1.00 1.01 1.02 1.03 1 04 1.05 1.06 1.07

0.65 0.66 0.67 0.68 0.69 0.70 0.71 0.73 0.74 0.75
|
10 1.08 1.09 1.10 1.11 1.13 1.14 1.15 1.16 1.17 1.18

13 1.41 1.42 1.45 1.44 1.45 1.46 1.47 1.48 1.49 1.50
14 1.51 1.53 1.54 1.55 1.56 1.57 1.58 1.59 1.60 1.61
15 1.62 1.63 1.64 1.66 1.67 1.68 1.69 1.70 1.71 1.72

16 1.73 1.74 1.75 1.76 1.77 1.78 1.80 1.81 1.82 1.83
17 1.84 1.85 1.86 1.87 1.88 1.89 1.90 1.91 1.92 1.94
18 1.95 1.96 1.97 1.98 1.99 2.00 2.01 2.02 2.03 2.04
19 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15
20 2.16 2.17 2.18 2.20 2.21 2.22 2.23 2.24 2.25 2.26

21 2.27 2.28 2.29 2.30 2.31 2.33 2.34 2.35 2.36 2.37
22 2.38 2.39 2.40 2.41 2.42 2.43 2.44 2-46 2.47 2.48
23 2-49 2.50 2.51 2.52 2.53 2.54 2.55 2.56 2.57 2.59
24 2.60 2.61 2.62 2.63 2.64 2.65 2.66 2.67 2.68 2.69
25 2.70 2.71 2.73 2.74 2.75 2.76 2.77 2.78 2.79 2.80

|

26 2.81 2.82 2.83 2.84 2.86 2.87 2.88 2.89 2.90 2.91 |

27 2.92 2.93 2.94 2.95 2.96 2.97 2.99 3.00 3.01 3.02 |
28 3.03 3.04 3-05 3.06 3.07 3.08 3.09 3.10 3-11 3.13
29 3.14 3.15 3.16 3.17 3.18 3.19 3.20 3.21 3.22 3.23
30 3-24 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3-34

|

|

31 3.35 3-36 3.37 3.39 3.40 3.41 3-42 3-43 3.44 3.45
32 3.46 3.47 3.48 3.49 3.50 3.52 3.53 3.54 3.55 3-56
33 3-57 3.58 3.59 3.60 3.61 3.62 3.63 3.64 3.66 3-67
34 3-68 3.69 3.70 3.71 3.72 3.73 3.74 3.75 3-76 377
35 3-79 3.80 3.81 3-82 3.83 3.84 3.85 3.86 3.87 3.88

il 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.27 1.28 1.29
12 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.40
)
!
0. 1. 2. 3. 4. 3. 6. 7 8. 9.

C 95

er |

802 REDUCTION OF THE BAROMETER TO THE FREEZING POINT.
=a. ae 2
| BAROMETER: 675" (from 672.51 to 677.50). |
|| Centi-
| grade Tenths of Degrees.
Degrees.
0. 1. 2. Be d. 6. Te 8. 9.
| ° Millim. | Millim. | Millim, | Millim. | Millim. | Millim. | Millim. | Millim. Millim, Millim.
0 0.00 0.01 0.02 0.03 0.04 0.05 0.07 0.08 0.09 0.10
1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.19 0.20 0.21
2 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.31 0.32
3 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40 0.41 0.42
4 0.44 0.45 0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.53
5 0.54 0.56 0.57 0.58 0.59 0.60 0.61 0.62 0.63 0.64
6 0.65 0.66 0.68 0.69 0.70 0.71 0.72 0.73 0.74 0.75
7 0.76 0.77 0.78 0.80 0.81 0.82 0.83 0.84 0.85 0.86
8 0.87 0.88 0.89 0.90 0.92 0.93 0.94 0.95 0.96 0.97
9 0.98 0.99 1.00 1.01 1.02 1.03 1.05 1.06 1.07 1.08
10 1.09 1.10 1.11 1.12 1.15 1.14 1.15 1.17 1.18 1.19
il 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.29 1.30
12 1.31 1.52 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.41
| 13 1.42 1.43 1.44 1.45 1.46 1.47 1.48 1.49 1.50 1.51
| 14 1.53 1.54 1.55 1.56 1.57 1.58 1.59 1.60 1.61 1.62
| 15 1.63 1.65 1.66 1.67 1.68 1.69 1.70 1.71 1.72 1.73
16 1.74 1.75 1.76 1.78 1.79 1.80 1.81 1.82 1.83 1.84
17 1.85 1.86 1.87 1.88 1.90 1.91 1.92 1.93 1.94 1.95
i 18 1.96 1.97 1.98 1.99 2.00 2.02 2.03 2.04 2.05 2.06
19 2.07 2.08 2.09 2.10 2.11 2.12 2.14 2.15 2.16 2.17
20 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.26 2.27 2.28
21 2.29 2.30 2.31 2.32 2.33 2.34 2.35 2.36 2.38 2.39
22 2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49
23 2.51 2.52 2.53 2.54 2.55 2.56 2.57 2.58 2.59 2.60
24 2.61 2.63 2.64 2.65 2.66 2.67 2.68 2.69 2-70 2.71
25 2.72 2.73 2.75 2.76 2.77 2.78 2.79 2.80 2.81 2.82
26 2.83 2.84 2.85 2.87 2.88 2.89 2.90 2.91 2.92 2.93
27 2.94 2.95 2.96 2.97 2.99 3.00 3.01 3.02 3-03 3.04
28 3.05 3.06 3.07 3.08 3.09 3.10 3.12 3.13 3-14 3.15
29 3-16 3.17 3.18 3.19 3.20 3.21 3.22 3.24 3-25 3.26
30 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3-36 3.37
31 3.38 3.89 3.40 3.41 3.42 3.43 3.44 3-45 3.46 3.48
32 3.49 3.50 3.51 3.52 3.53 3.54 3.55 3.56 3.57 3.58
1 33 3.60 3.61 3.62 3.63 3.64 3.65 3.66 3.67 3.68 3-69
{ 34 3.70 3.72 3.73 3.74 3.75 3.76 3.77 3.78 3.79 3.80
35 3.51 3.82 3.83 3.85 3.86 3.87 3.88 3.89 3.90 3.91
0. 1. 2. de 4. de 6. WV ; 8. 9.

96

REDUCTION OF THE BAROMETER TO THE FREEZING POINT, 303

BAROMETER : 680" (from 677.51 to 682.50).

Centi- :
neue Tenths of Degrees.
egrees.

de 6. We 8. 9.

3.

2. 4.

I.

0.

Millim. Millim. Millim. Millim. Millim.
0.05 0.07 0.08 0.09 0.10

Millim. | Millim. | Millim
0.02 0.03 0.04

° Millim | Millim.
0 0.00 0.01

1 0.11 0.12 0.13 0.14 0.15 0.16 0.18 0.19 0.20 0.21
2 0.22 0.23 0.24 0.25 0.26 0.27 0.29 0.30 0.31 0.32
3 0.33 0.34 0.35 0.36 0.37 0.38 0.40 0.41 0.42 0.43
4 0.44 0.45 0.46 0.47 0.48 0.49 0.50 0.52 0.53 0.54
5 1.55 0.56 0.57 0.58 0.59 0.60 0.61 0.63 0.64 0.65
6 0.66 0.67 0.68 0.69 0.70

7 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.85 0.86 0.87
8 0.88 0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.97 0.98
9 0.99 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.08 1.09

10 1.10 | 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.19 1.20

1.26 1.27 1.28 1.30 1.31
1.37 1.38 1.39 1.40 1.42
1.48 1.49 1.50 1.51 1.53
1.59 1.60 1.61 1.62 1.64
1.70 1.71 1.72 1.73 1.75

1.23 1.24 1.25
1.34 1.35 1.36
1.45 1.46 1.47
1.56 1.57 1.58
1.67 1.68 1.69

11 1.21 1.22
12 1.32 1.33
13 1.43 1.44
14 1.54 1.55
15 1.65 1.66

{
0.71. | 0.72 | 0.74 | 0.75 | 0.76

1.81 1.82 1.83 1.84 1.85
1.92 1.93 1.94 1.95 1.96
2.03 2.04 2.05 2.06 2.07
2.14 2.15 2.16 217 2.18
2.25 2.26 2.27 2.28 2.29

1.78 1.79 1.80
1.89 1.90 1.91
2.00 2.01 2.02
2.11 2.12 als
2.22 2.23 2.24

16 1.76 1.77
17 1.87 1°88
18 1.98 1.99
19 || 2.09 2.10
20 2.20 2.21

2.36 2.37 2.38 2.39 2.40
2.47 2.48 2.49 2.50 2.51
2.58 2.59 2.60 2.61 2.62
2.69 2.70 2.71 2.72 2.73
2.80 2.81 2.82 2.83 2.84

2.33 2.34 2.35
2.44 2.45 2.46
2.55 2.56 2.57
2.66 2.67 2.68
2.77 2.78 2.79

21 2.30 2.32
22 2.41 2.43
23 2.52 2.54
24 2.63 2.65
25 2.74 2.75

2.91 2.92 2.93 2.94 2.95
3.02 3.03 3.04 3.05 3.06
3.13 3.14 3.15 3.16 3.17
3.24 3.25 3.26 3.27 3.28
3.35 3.36 3.37 3.38 3.39

2.88 2.89 2.90
2.99 3.00 3.01
3.10 3.11 3.12
3.20 3.22 3.23
3.31 3.33 3.34

26 2.85 2.86
27 2.96 2.97
28 3.07 3.08
29 3.18 3.19
30 3-29 3.30

3.46 3.47 3.48 3.49 3.50
3.57 3.58 3.59 3.60 3.61
3.68 3.69 3.70 3.71 3.72
3.79 3.80 3.81 3.82 3.83
3.90 3.91 3.92 3.93 3.94

Dd. 6. Ge 8. 9.

3.42 3.44 3.45
3.53 3.54 3.56
3.64 3.65 3.67
3.75 3.76 3.78
3.86 3.87

31 || 3.40 | 3.41
1 32 || 3.51 | 3.52
33 || 3.62 | 3.63
34 || 3.73 | 3.74
35 || 3.84 | 3.85

0. i. 2. de 4.

C 97

304 REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER : 685": (from 682.51 to 687.50). |

Degrees,

0. 1. 2. Be 4. de 6. Ve 8. 9.

Millim. | Millim. | Millim. | Millim. | Millim. } Millim | Millim. | Millim. | Millim. | Millim.

0 0.00 0.01 0.02 0.03 0.04 0.06 0.07 0.08 0.09 0.10
1 0.11 0.12 0.13 0.14 0.15 0.17 0.18 0.19 0.20 0.21
2 0.22 0.23 0.24 0.25 0.27 0.28 0.29 0.30 0.31 0.32
3 0.33 0.34 0.35 0.36 0.38 0.39 0.40 0.41 0.42 0.43
4 0.44 0.45 0.46 0.48 0.49 0.50 0.51 0.52 0.53 0.54
5 0.55 0.56 0.57 0.59 0.60 0.61 0.62 0.63 0.64 0.65

6 0.66 0.67 0.69 0.70 0.71 0.72 0.73 0.74 0.75 0.76
7 0.77 0.78 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87
8 0.88 0.90 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98
9 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09
i tO 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.21

(
Centi- |
grade Tenths of Degrees. :

12 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 1.42 1.43
13 1.44 1.45 1.46 1.47 1.48 1.49 1.50 1.51 1.53 1.54
14 1.55 1.56 1.57 1.58 1.59 1.60 1.61 1.63 1.64 1.65
15 1.66 1.67 1.68 1.69 1.70 1.71 1.72 1.74 1.75 1.76

16 1.77 1.78 1.79 1.80 1.81 1.82 1.84 1.85 1.86 1.87
17 1.88 1.89 1.90 1.91 1.92 1.93 1.95 1.96 1.97 1.98
18 1.99 2.00 2.01 2.02 2.03 2.05 2.06 2.07 2.08 2.09
19 2.10 2.11 2.12 2.13 2.14 2.16 2.17 2.18 2.19 2.20

2.21 2.22 2.23 2.24 2.26 2.27 2.28 2.29 2.30 2.31

2.32 2.33 2.34 2.35 2.37 2.38 2.39 2.40 2.41 2.42

21

22 2.43 2.44 2.45 2.47 2.48 2.49 2.50 2.51 2.52 2.53
23 2.54 2.55 2.56 2.58 2.59 2.60 2.61 2.62 2.63 2.64
24 2.65 2.66 2.68 2.69 2.70 2.71 2.72 2.73 2.74 2.75

2.76 2.78 2.79 2.80 2.81 2.82 2.83 2.84 2.85 2.86

27 2.99 3-00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08
28 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3-18 3.20
29 3.21 3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.29 5.31
30 3.32 3.33 3.34 3.39 3.36 3.37 3.38 3.39 3.41 3.42
31 3.43 3.44 3.45 3.46 3-47 3.48 3.49 3.50 3-52 3.53
32 3.54 3.55 3.56 3.57 3.58 3.59 3.60 3.62 3.63 5.64
33 3.65 3.66 3.67 3.68 3.69 3-70 3.71 3-73 3.74 3.75
34 3.76 3.77 3.78 3.79 3.80 3.81 3.83 3.84 3.85 3.86

26 2.87 2.89 2.90 2.91 2.92 2.93 2.94 2.95 2.96 2-97
3.87 3.88 3.89 3.90 3.91 3-92 3.94 3.95 3.96 3.97

|
11 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.30 1.32
|

| 0. | 1. 2, 3. 4. 5. 6. 7 8. 9. |
IL ass!

C 98

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER : 690" (from 687.51 to 692.50).

305

Centi- |
grade | Tenths of Degrees.
Degrees,
1. 2. Be de 6.
oO Millim. | Millim, | Millim, | Millim. | Millim. | Millim. | Millim.
0 0.00 0.01 0.02 0.03 0.04 0.06 0.07
1 0.11 0.12 0.13 0.14 0.16 0.17 0.18
2 0.22 0.23 0.25 0.26 0.27 0.28 0.29
3 0.33 0.35 0.36 0.37 0.38 0.39 0.40
4 0.45 0.46 0.47 0.48 0.49 0.50 0.51
5 0.56 0.57 0.58 0.59 0.60 0.61 0.62
6 0.67 0.68 0.69 0.70 0.71 0.72 0.74
7 0.78 0.79 0.89 0.81 0.82 0.84 0.85
8 0.89 0.90 0.91 0.92 0.94 0.95 0.96
9 1.00 1.01 1.02 1.04 1.05 1.06 1.07
10 1.11 1.12 1.14 1.15 1.16 1.17 1.18
11 1.23 1.24 1.25 1.26 1.27 1.28 1.29
12 1.34 1.35 1.36 1.37 1.38 1.39 1.40
13 1.45 1.46 1.47 1.48 1.49 1.50 1.51
14 1.56 1.57 1.58 1.59 1.60 1.61 1.63
15 1.67 1.68 1.69 1.70 1.72 1.73 1.74
16 1.78 1.79 1.80 1.82 1.83 1.84 1.85
17 1.89 1.90 1.92 1.93 1.94 1.95 1.96
18 2.00 2.02 2.03 2.04 2.05 2.06 2.07
19 2.12 2.13 2.14 2.15 2.16 2517 2.18
20 2.23 2.24 2.25 2.26 2.27 2.28 2.29
21 2.34 2.35 2.36 2.37 2.38 2.39 2.41
22 2.45 2.46 2.47 2.48 2.49 2.51 2.52
23 2-56 2.57 2.58 2.59 2.61 2.62 2.63
24 2.67 2.68 2.70 2.71 2.72 2.73 2.74
25 2.78 2.80 2.81 2.82 2.83 2.84 2.85
26 2.90 2.91 2.92 2.93 2.94 2.95 2.96
27 3.01 3.02 3.03 3.04 3.05 3.06 3.07
28 3.12 3.13 3.14 3.15 3.16 3.17 3.19
29 8.23 3.24 3.25 3.26 3.27 3.29 3.30
30 3.34 3.35 3.36 3.37 3-39 3.40 3-41
31 3.45 3.46 3.47 3.49 3.50 3.51 3-52
32 3.56 3.57 3.59 3.60 3.61 3.62 3.63
33 3-68 3.69 3.70 3.71 3.72 3.73 3.74
34 3.79 3.80 3.81 3.82 3.83 3.84 3.85
35 3.90 3.91 3.92 3-93 3.94 3.95 3-96
A. de 6.

| 0. 1. 2. De

Ve

Millim.

0.08

0.19
0.30
0.41
0.52
0.63

0.75
0.86
0.97
1.08
1.19

1.39
1.41
1.53
1.64
1.75

1.86
1.97
2.08
2.19
2.31

2.42
2.53
2.64
2.75
2.86

2.97
3.038
3.20
3.31
3.42

3-53
3.64
3.75
3.86
3.98

Ge

8.

Millim.
0.09

0.20
0.31
0.42
0.53
0.65

0.76
0.87
0.98
1.09
1.20

1.31
1.43
1.54
1.65
1.76

1.87
1.98
2.09
2.21
2.32

2.43
2.54
2.65
2.76
2.87

2.98
3.10
3.21
3.32
3.43

3.54
3.65
3.76
3.88
3.99

8.

=
9.

Millim.
0.10

0.21 |
0.32
0.43
0.55
0.66

0.77
0.88
0.99
1.10
1.21

1.33
1.44
1.55
1.66
1.77

1.88
1.99
2.10
2.22
2.33

2.44
2.55
2.66
2.77
2.88 ||

3.00
3.11
3.22
3.33
3.44

3.55
3.66
3.78
3.89
4.00

oa

C 99

306

Centi-
grade
Degrees.
0. I. 2. Be
o Millim. | Millim. | Millim. | Millim.
0 0.00 0.01 0.02 0.03
1 0.11 0.12 0.13 0.15
2 0.22 0.24 0.25 0.26
3 0.34 0.35 0.36 0.37
| 4 || 0.45 | 0.46 | 0.47. | 0.48
5 0.56 0.57 0.58 0.59
6 0.67 0.68 0.70 0.71
"4, 0.79 0.80 0.81 0.82
8 0.90 0.91 0.92 0.93
9 1.01 1.02 1.03 1.04
10 1.12 1.13 1.14 1.16
11 1.23 1.25 1.26 1.27
12 1.35 1.36 1.37 1.38
13 1.46 1.47 1.48 1.49
14 1.57 1.58 1.59 1.60
15 1.68 1.69 1.71 1.72
16 1.79 1.81 1.82 1.83
17 1.91 1.92 1.93 1.94
18 2.02 2.03 2.04 2.05
19 2.13 2.14 2.15 2.16
20 2.24 2.25 2.27 2.28
21 2.36 2.37 2.38 2.39
22 2.47 2.48 2.49 2.50
23 2.58 2.59 2.60 2.61
24 2.69 2.70 204 2.73
25 2.80 2.82 2.83 2.84
26 2.92 2.93 2.94 2.95
27 3.03 3.04 3.05 3.06
28 3.14 3.15 3.16 3.17
29 BY43) 3.26 3.28 3.29
30 3.37 3.38 3.39 3.40
31 3.48 3.49 3.50 3.51
32 3.59 3.60 3.61 3.62
33 3.70 3.71 3.72 3.74
34 3.81 3.83 3.84 3.85
35 3.93 3.94 3.95 3.96
De

REDUCTION

OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER: 695": (from 692.51 to 697.50).

Tenths of Degrees.

4.

Millim
0.04

0.16
0.27
0.38
0.49
0.61

0.72
0.83
0.94
1.05
Ley,

1.28
1.39
1.50
1.61
1.73

1.84
1.95
2.06
2.18
2.29

2.40
2.51
2.62
2.74
2.85

2.96
3.07
3.19
3.30
3.41

3.52
3.63
3.75
3.86
3.97

de 6.
Millim. | Millim.
0.06 0.07
0.17 0.18
0.28 0.29
9.39 0.40
0.50 0.52
0.62 0.63
0.73 0.74
0.84 0.85
0.95 0.96
1.07 1.08
1.18 1.19
1.29 1.30
1.40 1.41
1.51 1.52
1.63 1.64
1.74 175
1.85 1.86
1.96 1.97
2.08 2.09
2.19 2.20
2.30 2.31
2.41 2.42
2.52 2.53
2.64 2.65
2.75 2.76
2.86 2.87
2.97 2.98
3.08 3.10
3.20 3.21
3.31 3.32
3.42 3.43
3.53 3-54
3.65 3.66
3.76 3.77
3.87 3.88
3.98 3.99
3d. 6.

Ze 8.
Millim. | Millim.
0.08 0.09
0.19 0.20
0.30 0.31
0.42 0.43
0.53 0.54
0.64 0.65
0.75 0.76
0.86 0.87
0.98 0.99
1.09 1.10
1.20 1.21
1.3] 1.32
1.42 1.44
1.54 1.55
1.65 1.66
1.76 1.77
1.87 1.88
1.99 2.00
2.10 2.11
2.21 2.22
2.32 2.33
2.43 2.45
2.55 2.56
2.66 2.67
2617 2.78
2.88 2.89
3.00 3.01
3-11 3.12
3.22 3.23
ees 3.04
3.44 3.45
3.56 3.57
3.67 3.68
3.78 3-79
3.89 3.90
4.00 4.02
7. 8.

|

Millim.
0.10

0.21
0.33
0.44
0.55
0.66

0.77
0.89
1.00
1.11
1.22

1.33
1.45
1.56
1.67
1.78

1.90
2.01
2.12
2.23
2.34

2.46
2.57
2.68
2.79
2.91

3.02
3.13
3.24
3.35
3.47

3.58
3.69
3.80
3.91
4.03

9.

REDUCTION OF THE BARWMETER TO THE FREEZING POINT. 307

Oenti-
grade
Degrees.

BAROMETER: 700" (from 697.51 to 702.50).

Tenths of Degrees.

0. 1. 2. 3. 4. 5. 6. Fe 8. 9.

Millim. | Millim. | Millim. | Millim. | Millim. }| Millim. | Millim. | Millim. | Millim. | Millim.
0.00 0.01 0.02 0.03 0.05 0.06 0.07 0.08 0.09 0.10

0.11 0.12 0.14 0.15 0.16 0.17 0.18 0.19 0.20 0.21
0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.31 0.32 0.33
0.34 0.35 0.36 0.37 0.38 0.40 0.41 0.42 0.43 0.44
0.45 0.46 0.47 0.49 0.50 0.51 0.52 0.53 0.54 0.55
0.56 0.58 0.59 0.60 0.61 0.62 0.63 0.64 0.66 0.67

0.68 0.69 0.70 0.71 0.72 0.73 0.75 0.76 0.77 0.78

0.79 0.81 0.82 0.84 0.85 0.86 0.87 0.88 0.89
0.90 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.01
1.02 . 1.04 1.05 1.06 1.07 1.08 1.10 1.11 1.12
1.13 0 1.15 1.16 1.17 1.19 1.20 1.21 1.22 1.23
1.24 one 1.27 1.28 1.29 1.30 1.31 1.32 1.33 1.34
1.36 ee 1.39 1.40 1.41 1.42 1.43 1.45 1.46
1.47 1.49 1.50 1.51 1.53 1.54 1.55 1.56 1.57
1.58 : 1.60 1.62 1.63 1.64 1.65 1.66 1.67 1.68
1.69 : 1.72 1.73 1.74 1.75 1.76 1.77 1.79 1.80
1.81 : 1.83 1.84 1.85 1.86 1.88 1.89 1.90 1.91
1.92 ; 1.94 1.95 1.97 1.98 1.99 2.00 2.01 2.02
2.03 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.14
2.15 : 2.17 2.18 2.19 2.20 2.21 2.23 2.24 2.25
2.26 : 2.29 2.30 2.32 2.33 2.34 2.35 2.36
2.37 : : 2.41 2.42 2.43 2.44 2.45 2.46 2.47
2.49 : 2.52 2.53 2.54 2.55 2.56 2.58 2.59
2.60 : 2.63 2.64 2.66 2.67 2.68 2.69 2.70
2.71 2.75 2.76 2.77 2.78 2.79 2.80 2.81
2.82 : . 2.86 2.87 2.88 2.89 2.90 2.91 2.93
2.94 : 2.97 2.98 2.99 3.01 3.02 3.03 3.04
3.05 : 3.08 3.10 3.11 3.12 3.13 314 3.15
3.16 : : 3.20 3.21 3.22 3.23 3.24 3.25 3.27
3.28 ; 2 3.31 3.32 3.393 3.34 3.36 3.37 5.38
3.39 : . 3.42 3.43 3.45 3.46 3.47 3.48 3.49
3.50 : 5: 3.54 3.55 3.56 3-57 3.58 3-59 3.60 |
3.62 -6- 3.65 3.66 3.67 3.68 3.69 3-71 3.72
3.73 ; o@i 3.76 3.77 3-78 3.80 3.81 3-82 | 3.83
3.84 : 3.88 3.89 3.90 3.91 3.92 3.93 3.94
3.95 . . 3.99 4.00 4.01 4.02 4.03 4.04 4.06
oO. 4. de 6. Ze &. 9.

101

308 REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

| BAROMETER : 705" (from 702.51 to 707.50).

Centi-

grade Tenths of Degrees.
Degrees.
0. 1. 2. de 4. De 6. as 8. 9.

a Millim. | Millim. Millim, Millim, Millim. Millim. Millim. Millim, | Millim, Millim,.
0 0.00 0.01 0.02 0.03 0.05 0.06 0.07 0.08 0.09 0.10
1 0.11 0.13 0.14 0.15.) 0.16 0.17 0.18 0.19 0.20 0.22

| 2 0.23 0.24 0.25 0.26 0.27 0.28 0.30 0.31 0.32 0 33
3 0.34 0.35 0.36 0.38 0.39 0.40 0.41 0.42 0.43 0.44
4 0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.53 0.55 0.56
5 0.57 0.58 0.59 0.60 0.61 0.63 0.64 0.65 0.66 0.67
6 0.68 0.69 0.71 0272) HOM73" | 0:74 0.75 0.76 0.77 0.79
7 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.88 0.89 0.90 |
8 0.91 0.92 0.93 0.94 0.96 0.97 0.98 0.99 1.00 1.01
9 1.02 1.04 1.05 1.06 1.07 1.08 1 09 1.10 1.12 1.13

10 1.14 1.15 1.16 1.17 1.18 1.19 1.21 1.22 1.23 1.24

11 1.25 1.26 1.27 1.29 1.30 1.31 1.32 1.33 1.34 1.35
12 1.37 1.38 1.39 1.40 1.41 1.42 1.43 1.45 1.46 1.47
13 1.48 1.49 1.50 1.51 1.52 1.54 1.55 1.56 1.57 1.58
14 1.59 1.60 1.62 1.63 1.64 1.65 1.66 1.67 1.68 1.70

15 1.71 1.72 1.73 1.74 1.75 1.76 1.78 1.79 1.80 1.81

16 1.82 1.83 1.84 1.85 | 1:87 | 1.88 1.89 1.90 1.91 a
17 1.93 | 1.95 1.96 1.97 | 1.98 | 1.99 |! 2.00 2.01 2.03 2.04
ll 418 2.05 | 2.06 2.07 2082 |! 2:0or | Qik) a2 2.13 2.94 2.15
| 49 2216) ||), 2517, 2.18 23202 |) 2:21 | | 2.22%) 2:08 2.24 2.45 2.26
|| 90 2.28 2.29 2.30 2.31 D320 1) 2:83 2.34 2.36 2.37 2.38
|
{
|
|
1

| 1 2.39 2.40 2.41 2.42 2.44 2.45 2.46 2.47 2.48 2.49
in 22 2.50 2.51 2.53 2.54 2.55 2.56 2.57 2.58 2.59 2.61
23 2.62 | 2.63 2.64 2.65 2.66 2.67 2.69 2.70 2.71 2.72
24 2.73 2.74 2.75 2.77 2.78 2.79 2,80 2.81 2.82 2.83
25 2.84 2.86 2.87 2.88 2.89 2.90 2.91 2.92 2.94 2.95

26 2.96 2.97 2.98 2.99 3.00 3.02 3.03 3-04 3.05 3.06
27 3.07 3.08 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17
28 3.19 3.20 ; 3.21 3.22 3.23 3.24 3.25 3.27 3.28 3.29
29 3.30 3.31 3.32 3.33 3.35 3.36 3.37 3.33 3.39 3.40
30 3.41 3.42 3.44 3.45 3.46 3.47 3.48 3.49 3.50 3.52

31 jl 3.53 3.54 3.55 3.56 3.57 3.58 3.60 3-61 3.62 3.63
32 5.64 3.65 3.66 3.68 3.69 3.70 3.71 3.72 3.73 3.74
33 3.75 3.77 3.78 3.79 3.80 3.81 3.82 3.83 3.85 3.86
34 3.87 3.88 3.89 3.90 3.91 3.93 3.94 3.95 3.96 3.97
35 3.98 3.99 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08

of ltt ae 2, gah ae lense 6. %. S. 9.

Cc 102

16
17
18
19
20

21
22
23
24
25

26
27
28
29
30

31
32
| 33
| 34

2 She Sewkts SE =* =:
Sana
wie

Om oO bo me oo CaS
Beas

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER: 710"™ (from 707.51 to 712.50).

Tenths of Degrees.

309

0. 1. 2 be 4. dD. 6. Ze 8. 9.
| Millim. “Mittin. Millim. “Millim. Miltim. | Millim. Millim | Millim. Millim. | "Milli.
0.00 | 0.01 | 0.02 | 0.03 | 0.05 | 0.06 | 0.07 | 0.08 | 0.09 | 0.10
OH! | | ONS |) Oma) | O8se- |) Ose "OM |) (OS. } Olag). |: Oten- |) 0.22
0.23 | 0.24 | 0.25 | 0.26 | 0.28 | 0.29 | 0.30 | 0.31 | 0.32 | 0.33
Osa") Get |) Gsz| “oisss| -Ofs9) 1 02408 |, Oran} (0:42) || 0:44. |' 0145
0.46 | 0.47 | 0.48 | 0.49 | 0.50 | 0.52 | 0.53 | 0.54 | 0.55 | 0.56
0:57' | 0:58’ | 0.60 | 0:62 | 0.62 | 0:63 | 0.64 | 0:65 | 0.66 | 0.68
0:69 | 0:70: | O.71 | 0.72 | 0.73 | 0.74 | 0.76 | 0.77 | 0.78 |. 0.79
0.80 | 0.81 | 0.83 | 0.84 | 0.85 | 0.86 | 0.87 | 0.88 | 0.89 | 0.91
0.92 | 0.93 | 0.94 | 0.95 | 0.96 | 0.97 | 0.99 | 1.00 | 1.01 | 1.02
wos! |) Moa | hos |. Lox |) tes |) 109!.|) i410 | 11 12/0 113
Wage |) tates |) Tan |) Tks) tex) |) 20) |) ea) Ih 1429 1 Tee 1 The
¥96. |) Van | 1.28 | 1.29 |) wear | usar | 1ca3> | gay |) ag) | 1.86
WSS), SO PAS |e Waa ea easy eda | 4G be dear | das
TAO) [| 1E50" | TE | 62) eae ese) eset | 1B7Z | bes 59
¥.60 | 1:62 | U63 | 164 | 1.65 | 1:66: | 167 | 1.68: | 1.70: | 1.71
wepee sir Wee |) Tera | Were Teves Wl aezee |i zor | WesOe|) TWesay i) Wi82
Hes | Usd) ee) sz.) aes f wes97 |). e908 |! 12998 |) 11986 17 198
1.95 | 1.96 | 1.97 | 1.98 | 1.99 | 2.01 | 2.02 | 2.03 | 2.04 | 2.05
2.06 | 2.07 | 2.09 | 2.10 | 2.11 | 2.12 | 2.13 | 2.14 | 2.15 | 2.17
2.18 | 2.19 | 2.20 | 2.21 | 2.22 | 2.23 | 2.95 | 2.26 | 2.27 | 2.98
B99; | 280. | 28I. | 23a) |), gee) | aig5p |) 236. |) 2:87c 1) S38— |||) 240
2.4 | 2:42 | 2.43 | 2.44 | 2.45 | 2.46 | 2.48 | 2.49 | 2.50 | 2.51
2.52 | 2.53 | 2.54 | 2.56 | 2.57 | 2.58 | 2.59 | 2.60 | 2.61 | 2.62
2.64 | 2.65 | 2.66 | 2.67 | 2.68 | 2.69 | 2.70 | 2.72 | 2.73 | 2.74
2.75 | 2.76 | 2.77 | 2.78 | 2.80 | 2.81 | 2.82 | 2.88 | 2.84 | 2.85
2.86 | 2.88 | 2.89 | 2.90 | 2.91 | 2.92 | 2.93 | 2.95 | 2.96 | 2.97
2.98 | 2.99 | 3.00 | 3.01 | 3.03 | 3.04 | 3.05 | 3.06 | 3.07 | 3.08
JOH ||) Me | Sawant Sash) Saba, seas |) S1Gk NP Senge |) S1Ge 3.90
S20) |) S122) |) S228: || seat) B05, | 3:27) || s:2a. | 3.29.1 3:30, |) 3.34
3:32) | 3.88 | 8.85 | 3.386 | 3.87 | 3:38 | 3:39 | 3.40 | 3.41. | 3.48
3:44 | 3045) | S246 | S47 | Bias | 260: |, 3.5% | 9:52 | 9.58. | 3.54
3.55 | 3.56 | 3.58 | 3.59 | 3.60 | 3.61 | 3.62 || 3.63 | 3.64 | 3.66
3.67 | 3.68 | 3.69 | 3.70 | 3.71 | 3.72 | 3.74 | 3.75 | 8.76 | 3.77
3.78 | 3.79 | 3.80 | 3.82 | 3.83 | 3.84 | 3.85 | 3.86 | 3.87 | 3.88. |:
3.90 | 3.91 | 3.92 | 3.93 | 3.94 | 3.95 | 3.96 |. 3.98 | 3.99 | 4.00 |)
4.01 | 4.02 | 4.03 | 4.05 | 4.06 | 4.07 | 4.08 | 4.09 | 4.10 | 4.11
0. 1. 2, 3. 4. 5. 6. 7. 8. 9. |
ee = 2 u La _!
103

Centi-
grade
Degrees.

ow

af Wh =

oan Dd

11
12
13
14
15

16
17
18
19
20

21
22
23
24

26
27
28
29
30

31
32
33
34

r

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

0.

Millim.
0.00

0.12
0.23
0.35
0.46
0.58

0.69
0.81
0.92
1.04
1.15

1.27
1.38
1.50
1.62
1.73

1.85
1.96
2.08
2.19
2.31

2.42
2.54
2.65
2.77
2.89

3.00
3.12
3.35
3.46

3.58
3.69
3.81
3.92
4.04

0.

|
|
1. 2. Be 4. de 6. Ze 8. 9. |
Millim. | Millim. | Millim. | Millim | Millim. | Millim. | Millim, | Millim. | Millim.
0.01 0.02 0.04 0.05 0.06 0.07 0.08 0.09 |, 0.10
0.13 0.14 0.15 0.16 0.17 0.18 0.20 0.21 0.22
0.24 0.25 0.27 0.28 0.29 0.30 0.31 0.32 0.33
0.36 0.37 0.38 0.39 9.40 0.42 0.43 0.44 0.45
0.47 0.48 0.50 0.51 0.52 0.53 0.54 0.55 0.57
0.59 0.60 0.61 0.62 0.63 0.65 0.66 0.67 0.68
0.70 0.72 0.73 0.74 0.75 0.76 0.77 0.78 0.80
0.82 0.83 0.84 0.85 0.87 0.88 0.89 0.90 0.91
0.93 0.95 0.96 0.97 0.98 0.99 1.00 1.02 1.03
1.05 1.06 1.07 1.08 1.10 1.11 1.12 1.13 1.14 :
Vay 1.18 1.19 1.20 1.21 1.22 1.23 1.25 1.26
1.28 1.29 1.30 1.32 1.33 1.34 1.35 1.36 1.37
1.40 1.41 1.42 1.43 1.44 1.45 1.47 1.48 1.49
1.51 1.52 1.53 1.55 1.56 Sa 1.58 1.59 1.60
1.63 1.64 1.65 1.66 1.67 1.68 1.70 a7 fal 1.72
1.74 1.75 1.77 1.78 1.79 1.80 1.8] 1.82 1.83
1.86 1.87 1.88 1.89 1.90 1.92 1.93 1.94 1.95
1.97 1.98 2.00 2.01 2.02 2.03 2.04 2.05 2.07
2.09 2.10 2.11 2.12 Zals 2.15 2.16 Dat 2.18
2.20 2.22 2520 2.24 2.25 2.26 2.27 2.28 2.30
2.32 2.33 2.34 2.35 20k 2.38 2.39 2.40 2.41
2.43 2.45 2.46 2.47 2.48 2.49 2.50 2.52 2.53
2355 2.56 2.57 2.58 2.60 2.61 2.62 2.63 2.64
2.67 2.68 2.69 2.70 2.71 2.72 2.74 2.75 2.76
2.78 2.79 2.80 2.82 2.83 2.84 2.85 2.86 2.87
2.90 2.91 2.92 2.93 2.94 2.95 2.97 2.98 2.99
3.01 3.02 3.04 3.05 3.06 3.07 3.08 3.09 3.10
3.13 3.14 sald 3.16 3.17 3.19 3.20 3.21 3.22
3.24 3.25 3.27 3.28 3.29 3.30 3.31 3.32 3.34
3.36 Sot 3.38 3.39 3.40 3.42 3.43 3.44 3.45
3.47 3.49 3.50 3:51 3.52 3.53 3.54 3.55 3.57
3-59 3.60 3.61 3.62 3.64 3.65 3.66 3.67 3.68
3.70 3.72 3.73 3.74 3.75 3.76 3.77 3.79 3.20
3.82 3.83 3.84 3.85 3.87 3.88 3.89 3.90 3.41
3.94 3.95 3.96 3.97 3.98 3.99 4.00 4.02 4.03
4.05 4.06 4.07 4.09 4.10 4.11 4.12 4.13 4.14
1. 2. Be 4. 3. 6. Zs 8. 9. |

BAROMETER : 715"": (from 712.51 to 717.50).

Tenths of Degrees.

Se ee

REDUCTION OF THE BAROMETER TO THE FREEZING POINT, 311

Centi-
grade Tenths of Degrees. |

A ih roa |
| BAROMETER: 720" (from 717.51 to 722.50).

|| Degrees.

0. I. 2. De Dd. 6. Ve 8. 9.

° Millim. | Millim. | Millim. | Millim. | Millim. | Millim Millim. | Millim. | Millim. Millim..
0 0.00 0.01 0.02 0.03 0.05 0.06 0.07 0.08 0.09 0.10
1 0.12 0.13 0.14 0.15 0.16 0.17 0.19 0.20 0.21 0.22
2 0.23 0.24 0.26 0.27 0.28 0.29 0.30 0.31 0.33 0.34
3 0.35 0.36 0.37 0.38 0.40 0.41 0.42 0.43 0.44 0.45
4 0.46 0.48 0.49 0.50 0.51 0.52 0.53 0.55 0.56 0.57
5 0.58 0.59 0.60 0.62 0.63 0.64 0.65 0.66 0.67 0.69
6 0.70 0.71 0.72 0.73 0.74 0.76 0.77 0.78 0.79 |: 0.80
7 0.81 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.91 0.92
8 0.93 0.94 0.95 0.96 0.98 0.99 1.00 1.01 1.02 1.03
9 1.05 1.06 1.07 1.08 1.09 1.10 L.r2 leds 1.14 1.15
10 1.16 1.17 1.19 1.20 P21 1.22 1.23 1.24 1.26 we27.
11 1.28 1.29 1.30 1.31 1.32 1.34 1.35 1.36 1.37 1.38
12 1.39 1.41 1.42 1.43 1.44 1.45 1.46 1.48 1.49 1.50
13 1.51 1.52 1.53 1.55 1.56 157 1.58 1.59 1.60 1.62

14 1.63 1.64 1.65 1.66 1.67 1.69 1.70 1.71 1.72 1.73 |
15 1.74 1.75 Daag 1.78 1.79 1.80 1.81 1.82 1.84 1.85
16 1.86 1.87 1.88 1.89 1.91 1.92 1.93 1.94 1.95 1.96
V7 1.98 1.99 2.00 2.01 2.02 2.03 2.05 2.06 2.07 2.08
18 2.09 2.10 2.11 2.13 2.14 2.15 2.16 Delt 2.18 2.20
19 2.21 2.22 2.23 2.24 2.25 2.27 2.28 2.29 2.30 Zoo
20 2.32 2.34 2.35 2.36 Ztail 2.38 2.39 2.41 2.42 2.43
21 2.44 2.45 2.46 2.48 2.49 2.50 Zeal! 2.52 2200. 2.54
: 22 2.56 2057) 2.58 2.59 2.60 2.61 2.63 2.64 2.65 2.66
23 2.67 2.68 2.70 aed 22, 2.73 2.74 2.75 2.77 2.78
24 2.79 2.80 2.81 2.82 2.84 2.85 2.86 2.87 2.88 2.89
25 2.91 2.92 2.93 2.94 2.95 2.96 2.97 2.99 3.00 3.01
26 3.02 3.03 3.04 3.06 3.07 3.08 3-09 3.10 3.11 3.13
27 3.14 3-15 3.16 aetlias 3.18 3.20 3-21 3.22 3.23 3.24
28 3.25 3.27 3.28 3.29 3.30 3.31 3-32 3.34 3.35 3.36
29 Sear 3-38 3.39 3.40 3.42 3.43 3-44 3.45 3.46 5.47

30 3.49 3.50 3.51 3.52 3.53 3.54 3-56 aed 3.58 3.59 |
31 3.60 3.61 3.63 3.64 3-65 3.66 3-67 3.68 3-70 3.71
32 3.72 3a 3.74 3.75 ould 3.78 3.79 3.80 3.81 3.82
33 3.83 3-85 3.86 3.87 3.88 3-89 3.90 3.92 3.93 3.94
34 3.95 3.96 3.97 3.99 4.00 4.01 4.02 4.03 4.04 4.06

35 4.07 4.08 4.09 4.10 4.11 4.13 4.14 4.15 4.16 4.17 |

0. 1. 2. ! Be 4. De 6. Ve 8. 9. |

RE I sain SA a iS pr MP Sn sh TY

SZ REDUCTION OF THE BAROMSTER TO THE FREEZING POINT.

BAROMETER : 725" (from 722.51 to 727.50).

Centi-
grade Tenths of Degrees.

Degrees.

0. I e eS de 4. De 6. Ne 8. 9.

3 Millim. | Millim. | Millim, | Millim, | Millim. | Millim. | Millim. | Millim. | Millim, | Millim.
0 0.00 0.01 0.02 0.04 0.05 0.06 0.07 0.08 0.09 0.11

1 0.12 0.13 0.14 0.15 0.16 0.18 0.19 0.20 0.21 0.22

2 0.23 0.25 0.26 0.27 0.28 0.29 0.30 0.32 0.33 0.34

3 0.35 0.36 0.37 0.39 0.40 0.41 0.42 0.43 0.44 0.46

4 0.47 0.48 0.49 0.50 0.51 0.53 0.54 0.55 0.56 0.57

5 0.59 0.60 0.61 0.62 0.63 0.64 0.66 0.67 0.68 0.69
|

6 0.70 0.71 0.73 0.74 0.75 0.76 0.77 0.78 0.80 0.81
7 0.82 0.83 0.84 0.85 0.87 0.88 0.89 0.90 0.91 0.92
8 0.94 0.95 0.96 0.97 0.98 0.99 1.01 1.02 1.03 1.04
9 1.05 1.06 1.08 1.09 1.10 1.11 1.12 1.14 1.15 1.16
10 1.17 1.18 1.19 1.21 1.22 1.23 1.24 1.25 1.26 1.28

ee ae ee ee ee ae ee. ee ee

11 1.29 1.30 1.31 1.32 1.33 1.35 1.36 1.37 1.38 1.39
12 1.40 1.42 1.43 1.44 1.45 1.46 1.47 1.49 1.50 1.51
13 1.52 1.53 1.54 1.56 1.57 1.58 1.59 1.60 1.61 1.63
14 1.64 1.65 1.66 1.67 1.69 1.70 1.71 1.72 1.73 1.74
15 1.76 1.77 1.78 1.79 1.80 1.81 1.83 1.84 1.85 1.86

16 1.87 1.88 1.90 1.91 1.92 1.93 1.94 1.95 1.97 1.98
17 1.99 2.00 2.01 2.02 2.04 2.05 2.06 2.07 2.08 2.09
NAS 2.11 2.12 2.13 2.14 2.15 2.16 2.18 2.19 2.20 2.21
i| 19 2.22 2.23 2.25 2.26 2.27 2.28 2.29 2.31 2.32 2.33
| 20 2.34 2.35 2.56 2.38 2.39 2.40 2.41 2.42 2.43 2.45

21 2.46 2.47 2.48 2.49 2.50 2.52 2.53 2.54 2.55 2.56
22 2.57 2.59 2.60 261 2.62 2.63 2.64 2.66 2.67 2.68
23 2-69 2.70 2.71 2.73 2.74 2.75 2.76 2.77 2.78 2.80
24 2.81 2.82 2.83 2.84 2.86 2.87 2.88 2.89 2.90 2.91
25 2.93 2.94 2.95 2.96 2.97 2.98 3.00 3.01 3.02 3.03

962 ||'3204" | 93:05. '| 18:07 9 | 13108 s) BSt09R S02) (Sat || 23512) “Saale sas
a7 ll (3.96 118.07-41 8.18 -| 1829 |e Set 9.20 | 13:98) | (9.948 Esonminsiog
28 3.28] (8.29°°, 3.80“) (SSTeimissanl i983 7 18.860) (8.864!) is:377 | a.S6
i; 29° 1°8.89° | 8.41] 8.42~| 3.437] S44] 8.45 | 8.46°] 848°) 3.49 1 3.50
| 30 3.51°°| 18.562") 18.58 3.55 | 3.56 | 3.57 | 3.58 .| 3.59 | 3.60 | 3.62

| 31 3.63 3-64 | 3.65 3.66 3.67 3.69 3.70 3-71 3.72 3.73
| 32 3.74 SO || naasi 3.78 3.79 3.80 3.81 3.83 3.84 3.85
| 33 || 3-86 3.87 | 3.88 3.90 3.91 3.92 3.93 3.94 3.96 3.97
34 3.98 3.99 4.00 4.01 4.03 4.04 4.05 4.06 4.07 4.08
35 | 4.10 4.11 | 4.12 4.13 4.14 4.15 4.17 4.18 4.19 4.20

| Ore Tas Sd ae 1 Seer le Mee 5 9.

ee =s

C 106

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 313

Es
BAROMETER: 730°” (from 727.51 to 732.50). |
Centi- |
grade Tenths of Degrees.
Dezrees.
1 0. 1. 2. be 4. de 6. Ze 8. 9.
iS Millim, Millim. Millim. Millim. Millim. Millim Millim. | Millim. Millim. “Milli, |
0 || 0.00 | 0.01 | 0.02 | 0.04 | 0.05 | 0.06 | 0.07 | 0.08 | 0.09 | O.11 ||
1 0.12 0.13 0.14 | 0.15 0.16 | 0.18 | 0.19 | 0.20 | 0.21 0.22 |
2 0.24 | 0.25 0.26 | 0.27 | 0.28 | 0.29 | 0.31 0.32 | 0.33 0.34
3 0.35 0.37 0.38 | 0.39 0.40 | 0.41 0.42 0.44 0.45 0.46 |'
4 0.47 0.48 0.49 | 0.51 0.52 | 0.53 | 0.54 | 0.55 0.57 | 0.58
5 0.59 0.60 | 0.61 | 0.62 | 0.64 | 0.65 | 0.66 | 0.67 | 0.68 | 0.70
|
6 0.71 0.72 0.73 | 0.74. | (0.75 | 0.77. |. 0.78 | 0.79 | 0.80. | 0.81
7 0.82 0.84 | 0.85 | 0.86 0.87 |] 0.88 | 090 | 0.91 0.92 | 0.93 |:
8 0.94 0.95 0.97 | 0.98 0.99 | 1.00 | 1.01 1.03 1.04 1.05 ||
9 1.06 1.07 1.08 | 1.10 Peme-f) 12k 1.13 1.14 1.15 1.17 |
10 1.18 1.19 P2002 W2R WBA. 1:26 1.26 127, 1.28
11 1.30 1.31 B81 21283 1.34 | 1.35 1.37 1.38 1.39 1.40
12 1.41 1.43 1.44, | 1.45 AGT VANE |) 1.48 1.50 | 1.51 1.52
13 1.53 1.54 1.56 | 1.57 1.58 | 1.59 | 1.60 1.61 1.63 1.64
14 1.65 1.66 1.67 | 1.68 1.70 } 1.71 1:72 173 1.74 1.76
15 La 1.78 1.79 | 1.80 1.81 | 1.83 1.84 1.85 1.86 1.87
16 1.89 1.90 1.91 | 1.92 1.93 } 1.94 1.96 1.97 | 1.98 1.99
Fhe 2.00 201 2.08.4) 2104.0] 23056], 2.06.2| 2-07 2.09 251018 p2abr
18 2.12 2.13 2.14 | 2.16 OP QS. 0 || 2:19 2.20 | 2.22 2.23
19 2.24 2.25 OG anit? 27ue || see OR OSs East 2.32 2.33 2.34
20 2.36 2.37 2.38 | 2.39 2.40 | 2.42 | 2.48 | 2.44 | 2.45 2.46
21 20Is |.) 249 2.50 | 2.51 5 | D5 24a | O5G | 5 O57, 2.58
22 2.59 2.60 2.62 | 2.63 2.64 | 2.65 | 2.66 2.67 | 2.69 2.70 |!
23 a7 2.72 2780 206 SIGL 227%. || 2578 2.79 2.80 | 2.82
24 2.83 2.84 2.85 | 2.86 2.87 | 2.89 | 2.90 | 2.91 2.92 2.93
25 2.95 | 2.96 2.97 | 2.98 | 2.99 ]| 3.01 302.8) 03108 3.04 | 3.05
26 3.06 | 3.08 S09 SO he Sete Ss ee | Seis 3.15 3.16 3.17
27 3.18 3.19 SAO eee Skee F294) |) ae 8G 3.28 3.29
28 3.30 | 3.31 BOP Ses SesoL Sebo B87 [88 3.39 3.41
29 3.42 3.43 3.44 | 3.45 | 3.46 | 3.48 | 3.49 3:50i |, 3:51 | 3:52
30 3.53 3.55 3.56 | 3.57 | 3.58 | 3.59 | 3.61 3.62 | 3.63 3.64
| 31 3.65 3.66 3.68 | 3.69 | 3.70 | 3.71 372 3773 | 8275 3.76
32 S5770\ 3.18 3.79 | 3.81 sign i 3188) | sis4 3.85 | 3.86 | 3.88
33 3.89 3.90 | 3.91 | 3.92 3.94 | 3.95 | 3.96 3.97 | 3.98 3.99
34 4.01 4.02 4.03 | 4.04 | 4.05 | 4.06 | 4.07 4.09 | 4.10 4.11
| 35 4.12 4.14 AAG AAG PART) PAS 2.) 4.09 4,21 4.22 4.23
! 0. 1. 2. Be 4. oD. 6. Ze 8. 9.
pee Tl

es 107

314

grade
Degrees.

| Centi-

oo

oO CO tO

ean a

11
12
13
14
15

16
17
1s
19
20

mmwhe we
me OD

i)
Or

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER : 735" (from 732.51 to 757.50).

Tenths of Degrees.

0.

Millim.

0.00

0.12
0.24
0.35
0.47
0.59

0.71
0.83
0.95
1.07
1.19

1.30
1.42
1.54
1.66
1.78

1.90
2.02
2.14
2.25
2.37

2.49
2.61
2-73
2.85
2.97

3.08
3.20
3.32
3.44
3.56

3.68
3.80
3.91
4.03
4.15

0.

1.

Millim.

0.01

3.69
3.81
3.93
4.05
4.16

1.

2.

Millim,

0.02

0.14
0.26
0.38
0.50
0.62

0.74
0.85
0.97
1.09
1.21

1.33
1.45
1.57
1.69
1.80

1.92
2.04
2.16
2.28
2.40

2.51
2.63
2.75
2.87
2.99

3.11
3.23
3.35
3.46
3.58

3.70
3.82
3.94
4.06
4.18

2.

3.

Millim.

0.04

0.15
0.27
0.39
0.51
0.63

0.75
0.87
0.98
1.10
1.22

1.34
1.46
1.58
1.70
1.82

1.93
2.05
2.17
2.29
2.41

2.53
2.65
2.76
2.88
3.00

3.12
3.24
3.36
3.48
3.59

3.71
3.83
3.95
4.07
4.19

5

4.

Millim.

0.05

0.17
0.28
0.40
0.52
0.64

0.76
0.88
1.00
1.12
1.23

1.35
1.47
1.59
1.71
1.83

1.95
2.06
2.18
2.30
2.42

2.54
2.66
2.78
2.89
3.01

3.13
3.25
3.37
3.49
3.61

3.72
3.84
3.96
4.08
4.20

4.

3.

Millim
0.06

0.18
0.30
0.42
0.53
0.65

0.77
0.89
1.01
1.13
1.25

1.36
1.48
1.60
1.72
1.84

1.96
2.08
2.19
2.31
2.43

2.55
2.67
2.79
2.91
3.03

3.14
3.26
3.38
3.50
3.62

3.74
3.86
3.97
4.09
4.21

5.

6. Ze
Millim. | Millim.
0.07 0.08
0.19 0.20
0.31 0.32
0.43 0.44
0.55 0.56
0.66 0.68
0.78 0.79
0.90 0.91
1.02 1.03
1.14 TS
1.26 1.27
1.37 1.39
1.49 1.51
1.61 1.63
1.73 1.74
1.85 1.86
1.97 1.98
2.09 2.10
2.21 2.22
2.33 Dood
2.44 2.46
2.56 2.57
2.68 2.69
2.80 2.81
2.92 2.93
3.04 3.05
3.16 3-17
S20, 3.29
3.39 3.40
3.51 3-52
3.63 3.64
3.75 3-76
3.87 3-88
3.99 4.00
4.10 4.12
4.22 4.24
6. We

8. 9.
Millim, | Millim.
0.09 0.11
0.21 0.23
0.33 0.34
0.45 0.46
0.57 0.58
0.69 0.70
0.81 0.82
0.93 0.94
1.04 1.06
1.16 Le
1.28 1.29
1.40 1.41
1.52 1.53
1.64 1.65
1.76 Ween
1.87 1.89
1.99 2.00
2:11 2.12
2.23 2.24
2.35 2.36
ZAT 2.48
2.59 2.60
2.70 2.72.
2.82 2.84
2.94 2.95
3.06 3.07
3.18 3.19
3.30 3.31
3.42 3.43
3.54 3.55
3.65 3.67
3.77 3.78
3.89 3.90
4.01 4.02
4.13 4.14
4.25 4.26
8. 9.

108

Centi-
grade
Degrees.
0.

> || Millim.
0 0.00
1 0.12
2 0.24
3 0.36
4 0.48
5 0.60
6 0.72
7 0.84
8
9

13 1.55
14 1.67
15 1.79
16 1.91
17 2.03
18 2.15
19 2.27
20 || 2.39
21 2.51
22 2.63
23 2.75
24 2.87
25 2.99
26 3.11
27 3.22
28 3.34

31 3.70
32 3.82
33 3.94
34 4.06
35 4.18

0.96
1.07

10 1.19

11 1.31

12 1.43

29 3.46
30 3.58

| 0. 1. 2 Se | a oS | ee ee s. 954)
ee a

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 315

BAROMETER: 740" (from 737.51 to 742.50). |

Tenths of Degrees.

I 2. de 4. de 6. 7 8. 9.

Millim. | Millim. | Millim. | Millim, | Millim. | Millim. | Millim. Millim. | Millim.
0.01 0.02 0.04 0.05 0.06 0.07 0.08 0.09 0.11

0.13 0.14 0.16 0.17 0.18 0.19 0.20 0.21 0.23
0.25 0.26 0.27 0.29 0.30 0.31 0.32 0.33 0.35
0.37 0.38 0.39 0.41 0.42 0.43 0.44 0.45 0.47
0.49 0.50 0.51 0.53 0.54 0.55 0.56 0.57 0.59
0.61 0.62 0.63 0.64 0.66 0.67 0.68 0.69 0.70

0.73 0.74 0.75 0.76 0.78 0.79 0.80 0.81 0.82
0.85 0.86 0.87 0.88 0.90 0.91 0.92 0.93 0.94
0.97 0.98 0.99 1.00 1.02 1.03 1.04 1.05 1.06
1.09 1.10 1.11 1.12 1.13 1.15 1.16 1.17 1.18
1.21 1.22 1.23 1.24 1.25 1.27 1.28 1.29 1.30

1.33 1.54 1.35 1.36 1.37 1.39 1.40 1.41 1.42
1.45 1.46 1.47 1.48 1.49 1.50 1.52 1.53 1.54
1.56 1.58 1.59 1.60 1.61 1.62 1.64 1.65 1.66
1.68 1.70 1.71 1.72 1.73 1.74 1.76 1.77 1.78
1.80 1.82 1.83 1.84 1.85 1.86 1.88 1.89 1.90

1.92 1.93 1.95 1.96 1.97 1.98 1.99 2.01 2.02
2.04 2.05 2.07 2.08 2.09 2.10 2.11 2.13 2.14
2.16 2.17 2.19 2.20 2.21 2.22 2.23 2.25 2.26
2.28 2.29 2.31 2.32 2.33 2.34 2.35 2.36 2.38
2.40 2.41 2.42 2.44 2.45 2.46 2.47 2.48 2.50

2.52 2.53 2.54 2.56 2.57 2.58 2.59 2.60 2.62
2.64 2.65 2.66 2.68 2.69 2.70 2.71 2.72 2.74
2.76 2.77 2.78 2.79 2.81 2.82 2.83 2.84 2.85
2.88 2.89 2.90 2.91 2.93 2.94 2.95 2.96 2.97
3.00 3.01 3.02 3.03 3.05 3.06 3.07 3.08 3.09

3.12 3.13 3.14 3.15 3.17 3.18 3.19 3.20 3.21
3.24 3.25 3.26 3.27 3.28 3.30 3.31 3.32 3.33
3.36 3.37 3.38 3.39 3.40 3.42 3.43 3.44 3.45
3.48 3.49 3.50 3.51 3.52 3.54 3.55 3.56 3.57
3-60 3.61 3.62 3.63 3.64 3.65 3.67 3.68 3.69

3.83 3.85 3.86 3.87 3.88 3.89 3.91 3.92 3.93
3.95 3.97 3.98 3.99 4.00 4.01 4.02 4.04 4.05
4.07 4.08 4.10 4.11 4.12 4.13 4.14 4.16 4.17

3.71 3.73 3.74 3.75 3.76 3.77 3.79 3.80 3.81
4.19 4.20 4.22 4.23 4.24 4.25 4.26 4.28 4.29 |

109

316

Centi-

| grade

'
Degrees.

oo

oF Wh

11
12
13
14
15

emt

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

| “il
BAROMETER: 745™™ (from 742.51 to 747.50). |
|

Tenths of Degrees.

0. 1. 2. Be 4. oD. 6. Ws 8. 9.
Millim. “Millim. Millim, “Milli. Millim | Mitlim. Millim, | “Milli. Millim. | Millim.
0.00 0.01 0.02 0.04 0.05 0.06 0.07 0.08 0.10 0.11
0.12 0.13 0.14 0.16 0.17 0.18 0.19 0.20 0.22 0.23
0.24 0.25 0.26 0.28 0.29 0.30 0.31 0.32 0.34 0.35
0.36 0.37 0.38 0.40 0.41 9.42 0.43 0.44 0.46 0.47
0.48 0.49 0.51 0.52 0.53 0.54 0.55 0.57 0.58 0.59
0.60 0.61 0.63 0.64 0.65 0.66 0.67 0.69 0.70 0.71
0.72 0.73 0.75 0.76 0.77 0.78 0.79 0.81 0.82 0.83
0.84 0.85 0.87 0.88 0.89 0.90 0.91 0.93 0.94 0.95
0.96 0.97 0.99 1.00 1.01 1.02 1.03 1.05 1.06 1.07
1.08 1.09 1.11 1.12 1.13 1.14 ge5 Dy 1.18 1.19
1.20 yc21 1.23 1.24 125 1.26 1.27 1.29 1.30 1.31
1.32 1.33 135 1.36 M37 1.38 1.39 1.41 1.42 1.43
1.44 1.45 1.47 1.48 1.49 1.50 1.52 1.53 1.54 15D
1.56 1.58 1.59 1.60 1.61 1.62 1.64 1.65 1.66 1.67
1.68 1.70 1.71 1.72 73 1.74 1.76 D7, 1.78 1.79
1.80 1.82 1.83 1.84 1.85 1.86 1.88 1.89 1.90 1.91
1.92 1.94 1.95 1.96 1.97 1.98 2.00 2.0] 2.02 2.03
2.04 2.06 2.07 2.08 2.09 2.10 2512 2.13 2.14 2.15
2.16 2.18 2.19 2.20 Deol Dean 2.24 2525 2.26 Dat
2.28 2.30 2.31 Doe 2.33 2.34 2.36 2.37 2.38 2.39
2.40 2.42 2.43 2.44 2:45) 2.46 2.48 2.49 2.50 2.51
2.53 2.54. 2255 2.56 2854) 2.59 2.60 2.61 2.62 2.63
2.65 2.66 2.67 2.68 2.69 2.71 2.72 PER} 2.74 2.75
2.77 2.78 2.79 2.80 2.81 2.83 2.84 2.85 2.86 2.87
2.89 2.90 2.91 2.92 2.93 2.95 2.96 2.97 2.98 2.99
3.01 3.02 3.03 3.04 3.05 3.07 3.08 3.09 3.10 3.11
Sel 3.14 Sed 3.16 3.17 3.19 3.20 3-21 3.22 3.23
3.20 3.26 3.27 3.28 3.29 3:31 3.32 ooo 3.34 3.35
Sor 3.38 3.39 3.40 3.41 3.43 3.44 3.45 3.46 3.48
3.49 3.50 3.51 3.52 3.54 3.55 3.56 3.57 3.58 3.60
3.61 3.62 3.63 3.64 3.66 3.67 3.68 3.69 3.70 3.72
3.73 3-74 3.75 3-76 3.78 3.79 3.80 3.81 3.82 3.84
3.85 3.86 3.87 3.88 3.90 3.91 3.92 3.93 3.94 3.96
3.97 3.98 3.99 4.00 4.02 4.03 4.04 4.05 4.06 4.08
4.09 4.10 4,11 4.12 4.14 4.15 4.16 4.17 4.18 4.20
4.21 4.22 4.23 4.24 4.26 4.27 4.28 4.29 4.30 4.32
0. 1. 2: be 4. 3. 6. Ze 8. 9.

110

Ti

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 317

Degrees.

ov

ao - Wh

16
uy

18
19
20

21
22
23
24
25

26
27
28
29
30

31
32
33
34

BAROMETER: 750"™ (from 747.51 to 752.50).

Tenths of Degrees.

Ze 8. 9.

Milli. Millim.
0.10 0.11

0. 1. 2. Be 4. de 6.

Millim. | Millim. | Millim. | Millim. | Millim.
0.00 0.01 0.02 0.04 0.05

Millim. | Millim. | Millim.
0.06 0.07 0.08

9.12 0.13 0.15 0.16 0.17 0.18 0.19 0.21 0.22 0.23
0.24 0.25 0.27 0.28 0.29 0.30 0.31 0.33 0.34 0.35
0.36 0.38 0.39 0.40 0.41 0.42 0.44 0.45 0.46 0.47
0.48-| 0.50 0.51 0.52 0.53 0.55 0.56 0.57 0.58 0.59
0.61 0.62 0.63 0.64 0.65 0.67 0.68 0.69 0.70 0.71

0.73 0.74 0.75 0.76 0.77 0.79 0.80 0.81 0.82 0.84
0.85 0.86 0.87 0.88 0.90 0.91 0.92 0.93 0.94 0.96
0.97 0.98 0.99 1.00 1.02 1.03 1.04 1.05 1.07 1.08
1.09 1.10 1.11 1.13 1.14 1.15 1.16 1.17 1.19 1.20
1.21 1.22 1.23 1.25 1.26 1.27 1.28 1.30 1.31 1.32

1.33 1.34 1.36 1.37 1.38
1.45 1.46 1.48 1.49 1.50
1.57 1.59 1:60 | 161 1.62
1.69 1.71 1.72 1.73 1.74
1.82 1.83 1.84 1.85 1.86

1.39 1.40 1.42
1.51 1.53 1.54
1.63 1.65 1.66
1.76 1.77 1.78
1.88 1.89 1.90

1.94 1.95. 1.96 1.97 1.99
2.06 2.07 2.08 2.09 Pet
2.18 2.19 2.20 2.21 2.23
2.30 2.31 2.32 2.34 2.35
2.42 2.43 2.45 2.46 2.47

2.00 2.01 2.02
2.12 2.13 2.14
2.24 2.25 2.26
2.36 2.37 2.38
2.48 2.49 2.51

2.52 2.53

2.54 2.55 2.57 2.58 2.59
2.66 2.68 2.69 2.70 2.71
2.78 2.80 2.81 2.82 2.83
2.91 2.92 2.93 2.94 2.95
3.03 3.04 3.05 3.06 3.07

2.60 2.61 2.63
2.72 2.73 2.73
2.84 2.86 2.87
2.97 2.98 2.99
3.09 3.10 3-11

1.43 1.44
1.55 1.56
2.64
2.76
2.88

1.67 1.68
1.79 1.80
1.91 1.92
2.03 2.05
2.15 2.17
2.28 2.29
3-00

2.40 2.41
3-12

3.15 3.16 3.17 3.18 3.20
3.27 3.28 3.29 3.30 3.32
3.39 3-40 3-41 3.43 3.44
3.51 3.52 3.54 3.55 3.56
3.63 3.64 3.66 3.67 5.68

3.21 3.22 3.23
3.33 3.34 3.305
3.45 3.46 3.47
3.57 3.58 3.60
3.69 3.70 3.72

3.24
3.37
3.49
3.61
3-73

3.75 3.76 3.78 3.79 3.80 3.81 3.83 3.84 3.85 3.86
3.87 3.89 3.90 3.91 3.92 3.93 3.95 3.96 3.97 3.98
3.99 4.01 4.02 4.03 4.04 4.06 4.07 4.08 4.09 4.10
4.12 4.15 4.14 4.15 4.16 4.18 4.19 4.20 4.21 4.22
4.24 4.25 4.26 4.27 4.29 4.32 4.33 4.35
0. I. 2. 3. 4. 8. 9.

REDUCTION OF THE /BAROMETER TO THE FREEZING POINT.

>

Millim.

0.10

0.22
0.34
0.46
0.58
0.7]

0.83
0.95
1.07
1.19
1.32

1.44
1.56
1.68
1.80
1.93

2.05
2.17
2.29
2.41
2.53

2.66
2.78
2.90
3.02
3.14

3.27
3.39
3.51
3.63
3.75

3.88
4.00
4.12
4.24
4.36

8.

fr
BAROMETER : 755°" (from 752.51 to 757.50).
Centi-
crade Tenths of Degrees.
Degrees.
0. 1. 2. be 4. De 6. J
° Millim. | Millim. Millim. Millim. | Millim } Millim. Millim, “Milliim.
0 0.00 0.01 0.02 0.04 0.05 0.06 0.07 0.09
! 1 0.12 0.13 0.15 0.16 0.17 0.18 0.19 0.21
2 0.24 0.26 0.27 0.28 0.29 0.30 0.32 0.33
3 0.37 0.38 0.39 0.40 0.41 0.43 0.44 0.45
4 0.49 0.50 0.51 0.52 0.54 0.55 0.56 0.57
5 0.61 0.62 0.63 0.65 0.66 0.67 0.68 0.69
6 0.73 0.74 0.76 0.77 0.78 0.79 0.80 0.82
7 0.85 0.87 0.88 0.89 0.90 0.91 0.93 0.94
8 0.97 0.99 1.00 1.01 1.02 1.04 1.05 1.06
9 1.10 1.11 1.12 1.13 1.15 1.16 PS, 1.18
10 1.22 1B} 1.24 1.26 127 1.28 1.29 1.30
11 1.34 135 1.36 1.38 1.39 1.40 1.41 1.43
12 1.46 1.47 1.49 1.50 1.51 152 1.54 1.55
13 1.58 1.60 1.61 1.62 1.63 1.65 1.66 1.67
14 Del 1.72 1.73 1.74 1.75 107, 1.78 1.79
15 1.83 1.84 1.85 1.86 1.88 1.89 1.90 1.91
16 1.95 1.96 1.97 1.99 2.00 2.01 2.02 2.04
We AT 2.07 2.08 2.10 2st 2.12 218 2.14 2.16
18 2.19 2.2L 2:22 2225 2.24 2525 22 2.28
19 2.32 Zee 2.34 2.35 2.36 2.38 2.39 2.40
20 2.44 2.45 2.46 2.47 2.49 2.50 2:51 2.52
21 2.56 2.57 2.58 2.60 2.61 2.62 2.63 2.64
22 2.68 2.69 201 2.72 2.73 2.74 2.75 2h
23 2.80 2.81 2.83 2.84 2.85 2.86 2.88 2.89
24 2.92 2.94 2.95 2.96 2.97 2.99 3.00 3.01
25 3.05 3.06 3.07 3.08 3.10 Selil 3.12 3.13
26 Sal, 3.18 3.19 3.20 3.22 See 3.24 3.25
27 3.29 3.30 Sco 3.390 3.04 3.35 3.36 3.38
28 3.41 3.42 3.44 3.45 3.46 3.47 3.49 3.50
29 3.53 3.55 3.56 3.57 3.58 3.59 3.61 3.62
30 3.66 3.67 3.68 3.69 3.70 3.72 3.73 3.74
31 3.78 3-79 3.80 3.81 3.83 3.84 3.85 3.86
32 3.90 3.91 3.92 3.94 3.95 3.96 3.97 3.98
3 4.02 4.03 4.05 4.06 4.07 4.08 4.09 4.11
34 4.14 4.16 4.17 4.18 4.19 4.20 4.22 4.23
! 35 4.26 4.28 4.29 4.30 4.31 4.33 4.34 4.35
} — aaa —
| 0. 1. 2. 3 4. 5. 6. me

112

9.

0.11

0.23
0.35
0.48
0.60
0.72

0.84
0.96
1.08
1.21
1.33

1.45
1.57
1.69
1.82
1.94

2.06
2.18
2.30
2.42
2.55

2.67
2.79
2.91
3.03
3.16

3.28
3.40
3.52
3.64

3.77

3.89
4.01
4.13
4.25
4.37

9.

Millim. |

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 319

a
; BAROMETER : 760": (from 757.51 to 762.50).
7 | Centi-

|

poe Tenths of Degrees.
egrees.

pave ae |

O Millim. | Millim, | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. |
0 0.00 0.01 0.02 0.04 0.05 0.06 0.07 0.09 0.10 0.11
1 0.12 0.13 0.15 0.16 0.17 0.18 0.20 0.21 0.22 0.23
2 0.25 0.26 0.27 0.28 0.29 0.31 0.32 0.33 0.34 0.36
3 0.37 0.38 0.39 0.40 0.42 0.43 0.44 0.45 0.47 0.48

4 0.49 0.50 0.52 0.53 0.54 0.55 0.56 0.58 0.59 0.60 |
5 0.61 0.63 0.64 0.65 0.66 0.67 0.69 0.70 0.71 0.72
6 0.74 0.75 0-76 0.77 0.79 0.80 0.81 0.82 0.83 0.85
7 0.86 0.87 0.88 0.90 0.91 0.92 0.93 0.94 0.96 0.97
8 0.98 0.99 1.01 1.02 1.03 1.04 1.05 1.07 1.08 1.09
9 1.10 1.12 1.13 1.14 1.15 Vy 1.18 1.19 1.20 1.21
10 1.23 1.24 1.25 1.26 1.28 1.29 1.30 1.31 1.32 1.34

12 1.47 1.48 1.50 1.51 1.52 1.53 1.55 1.56 1.57 1.58
13 1.59 1.61 1.62 1.63 1.64 1.66 1.67 1.68 1.69 1.71

14 1.72 1.73 1.74 1.75 1.77 1.78 1.79 1.80 1.82 1.83
15 1.84 1.85 1.86 1.88 1.89 1.90 1.91 1.93 1.94 1.95

16 1.96 1.97 1.99 2.00 2.01 2.02 2.04 2.05 2.06 2.07
17 2.09 2.10 2.11 2.12 2-13 2.15 2.16 217, 2.18 2.20
18 2.21 2.22 2.23 2.24 2.26 2.27 2.28 2.29 2.31 2.32
‘
|

19 2.33 2.34 2.36 2.37 2.38 2.39 2.40 2.42 2.43 2.44
20 2.45 2.47 2.48 2.49 2.50 2.51 2.53 2.54 2.55 2.56

21 2.58 2.59 2.60 2.61 2.63 2.64 2.65 2.66 2.67 2.69
22 2.70 2.71 2.72 2.74 2.75 2.76 2.77 2.78 2.80 2.81
23 2.82 2.83 2.85 2.86 2.87 2.88 2.89 2.91 2.92 2.93
24 2.94 2.96 2.97 2.98 2.99 3.01 3.02 3-03 3.04 3.05
25 3.07 3-08 3-09 3.10 3.12 3.13 3.14 3-15 3.16 3.18

26 3.19 3-20° 3.21 3.23 3.24 3.25 3.26 3.28 3.29 3.30
27 3.31 3°32 3.34 3.35 3.36 3.37 3.39 3.40 3.41 3.42
28 3.43 3-45 3.46 3.47 3.48 3.50 3.51 3-52 3.53 3.54
29 3.56 3-57 3.58 3.59 3.61 3.62 3-63 3.64 3.66 5.67
30 3.68 3-69 3.70 3.72 3.73 3.74 3.75 3°77 3.78 3.79

BI 3.80 3-81 3.83 3.84 3-85 3-86 3-88 3-89 3.90 3.91

| 32 3.93 3-94 3.95 3.96 3-97 3-99 4.00 4.01 4.02 4.04
33 4.05 4-06 4.07 4.08 4.10 4-11 4.12 4.13 4.15 4.16

34 4.17 4-18 4.20 4.21 4.22 4.23 4.24 4.26 4.27 4.28
35 4.29 4-31 4.32 4.33 4.34 4.35 4.37 4.35 4.39 4.40

11 1.35 1.36 1.37 1.39 1.40 1.41 1.42 1.44 1.45 1.46

0. 1. 2. 3. 4. 5. 6. Te 8. 9.

C 113

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

Centi-
grade
| Degrees.
||
\ a Millim.
| 0. || 0.00
|
1 1 0.12
} 2 || 0.25
| 3 || 0.37
| 4 || ‘0.49
| 5 || 0.62
| @ ll 0.74
| 7 0.86
fp as 0.99
} 9 1.11
10 1.23
| 11 1.36
i 12 1.48
| 413 1.61
We wa.o|| ars
| 45 || 1.85
|
ll! 16 1.98
|e te 2.10
| ag || 2.22
| 19 2.35
| 90 2.47
|
| 21 2.59
22 2t2
23 2.84
Q4 2.96
25 3.09
|
| 26 || 3.21
27 3.33
| 28 3.46
29 3-58
30 3-70
31 3.83
32 3.95
33 4.07
; 34 4.20
1 35 4.32
1 0.

1.

Millim.

2.

3.

4.

Millim.

Tenths of Degrees.

De

Millim.

6.

Millim, | Millim. Millim.
0.01 0.02 0.04 0.05 0.06 0.07
0.14 0.15 0.16 0.17 0.19 0.20
0.26 0.27 0.28 0.30 0.31 0.32
0.38 0.40 0.41 0.42 0.43 0.44
0.51 0.52 0.53 0.54 0.56 0.57
0.63 0.64 0.65 0.67 0.68 0.69
0.75 | 0.77 | 0.78 | 0.79 | 0.80 | 0.82
0.88 0.89 0.90 0.91 0.93 0.94
1.00 1.01 1.02 1.04 1.05 1.06
1.12 1.14 1.15 1.16 1.17 1.19
1.25 1.26 1.27 1.28 1.30 1.31
1.37 1.38 1.40 1.41 1.42 1.43
1.49 1.51 1.52 1.53 1.54 1.56
1.62 1.63 1.64 1.65 1.67 1.68
1.74 UD Ltd, 1.78 1.79 1.80
1.86 1.88 1.89 1.90 1.91 1.93
1.99 2.00 2.01 2.02 2.04 2.05
Quit 2.12 2.14 2.15 2.16 2.17
223. 2.25 2.26 2.27 2.28 2.30
2.36 2.37 2.38 2.40 2.41 2.42
2.48 2.49 2.51 2.52 2.90 2.54
2.61 2.62 2.63 2.64 2.65 2.67
2.73 2.74 2.75 Drttid: 2.78 2.79
2.85 2.86 2.88 2.89 2.90 2-91
2.98 2.99 3.00 3.01 3.03 3.04
3.10 3.11 3.12 3.14 3.15 3.16
3.22 3.20 3.25 3.26 3.27 3.28
3.35 3.36 3.37 3.38 3.40 3.41
3.47 3.48 3.49 3.51 3.52 3.53
3.59 3.61 3.62 3.63 3.64 3.65
3.72 3.73 3.74 3.75 3.47 3.78
3.84 3.85 3.86 3.88 3.89 3.90
3.96 3.98 3.99 4.00 4.01 4.03
4.09 4.10 4.11 4.12 4.14 4.15
4.21 4.22 4.24 4.25 4.26 4.27
4.33 4.35 4.36 4.37 4.38 4.40
1. 2. Be 4. de 6.
114

BAROMETER: 765"™ (from 762.51 to 767.50).

Millim.
0.09

0.21
0.33
0.46
0.58
0.70

0.83
0.95
1.07
1.20
1.32

1.44
1.57
1.69
1.82
1.94

2.06
2.19
2.31
2.43
2.56

2.68
2.80
2.93
3.05
3.17

3-30
3.42
3.54
3.67
3.79

3-91
4.04
4.16
4.28
4.41

Zo

Millim.
0.10

0.22
0.35
0.47
0.59
0.72

0.84
0.96
1.09
1.21
1.33

1.46
1.58
1-70
1.83
1-95

2.07
2.20
2.32
2.44
2.57

2.69
2.82
2.94
3.06
3.19

3.31
3.43
3.56
3.68
3.80

3.93
4.05
4.17
4.30
4.42

8.

Millim

0.11

0.23
0.36
0.48
0.61
0.73

0.85
0.98
1.10
1.22
1.35

1.47
1.59
1.72
1.84
1.96

2.09
2.21
2.33
2.46
2.58

2.70
2.83
2.95
3.07
3.20

3.32
3.44
3.57
3.69
3.82

3.94
4.06
4.19
4.31
4.43

—_—.

/

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

Centi-

oo

ar, Wh

canta

11
12
13
14
15

16
17
18
19
20

21
22
23
24
25

26
27
28
29
30

grade ’
Degrees.

0.

Millim.

0.00

0.12
0.25
0.37
0.50
0.62

0.75
0.87
0.99
1.12
1.24

1.37
1.49
1.62
1.74
1.86

1.99
2.11
2.24
2.36
2.49

2.61
2.73
2.86
2.98
3.11

3.23
3.36
3.48
3.60
3.73

3.85
3.98
4.10
4.23
4.35

0.

BAROMETER:

1.

Millim.
0.01

0.14
0.26
0.39
0.51
0.63

0.76
0.88
1.01
1.13
1.26

1.38
1.50
1.63
1.75
1.88

2.00
2.13
2.25
2.37
2.50

2.62
2.75
2.87
3.00
3.12

3.24
3.37
3.49
3.62
3.74

3.87
3.99
4.11
4.24
4.56"

1.

2.

Millim.

0.02

0.15
0.27
0.40
0.52
0.65

0.77
0.89
1.02
1.14
1.27

1.39
1.52
1.64
1.76
1.89

2.01
2.14
2.26
2.39
2.51

2.63
2.76
2.88
3-01
3-13

3-26
3-38
3-50
3-63
3-75

3.88
4.00
4.13
4.25
4.37

2.

rs

| Millim.

0.04

0.16
0.29
0.41
0.53
0.66

0.78
0.91
1.03
1.16
1.28

1.40
1.53
1.65
1.78
1.90

2.03
2.15
2.28
2.40
2.52

2.65
2.77
2.90
3.02
3.14

3.27
3.39
3.52
3.64
3.77

3.89
4.01
4.14
4.26
4.39

3.

770"™ (from 767.51 to 772.50).

Tenths of Degrees.

4.

Millim.

0.05

0.17
0.30
0.42
0.55

0.67

0.80
0.92
1.04
1.17
1.29

1.42
1.54
1.67
1.79
1.91

2.04
2.16
2.29
2.41
2.54

2.66
2.78
2.91
3.03
3.16

3.28
3.41
3.53
3.65
3.78

3.90
4.03
4.15
4.28
4.40

4.

Millim.

"3.29

3.

0.06

0.19
0.31
0.43
0.56
0.68

0.81
0.93
1.06
1.18
1.30

1.43
1-55
1.68
1.80
1.93

2.05
2.17
2.30
2.42
2.55

2.67
2.80
2.92
3.04
3.17

3.42
3.54
3.67
3.79

3.91
4.04
4.16
4.29
4.41

3.

6.

Millim.

0.07

0.20
0.32
0.45
0.57
0.70

0.82
0.94
1.07
1.19
1.32

1.44
ba
1.69
1.81
1.94

2.06
2.19
2.31
2.44
2.56

2.68
2.81
2.93
3.06
3.18

3.31
3.43

' 3.55

3.68
3.80

3.93
4.05
4.18
4.30
4.42

6.

Millim.

7

0.09

0.21
0.34
0.46
0.58
0.71

0.83
0.96
1.08
1.21
1.33

1.45
1.58
1.70
1.83
1.95

2.08
2.20
2.32
2.45
2.57

2.70
2.82
2.95
3-07

3.44
3.57
3.69

4.06
4.19
4.31
4.44

Ze

8.

Millim. |!

0.10

0.22
0.35
0.47
0.60
0.72

0.85
0.97
1.09
1.22
1.34

1.47
1.59
1.72
1.84
1.96

2.09
2.21
2.54
2.46
2.58

2.71
2.83
2.96
3.08
3.21

3.33
3.45
3-58
3.70
3.83

3.95
4.08
4.20
4.32
4.45

8.

115

9.

“Millim.

0.11

0.24
0.36
0.48
0.61
0.73

0.86
0.98
1.11
1.23
1.35

1.48
1.60
1.73

1.85
1.98

2.10
9.22
2.35
2.47
2.60

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

BAROMETER: 775"": (from 772.51 to 777.50).

Centi-
grade Tenths of Degrees.
Degrees.
0. 1. 2. z: 4. 5. 6. 7 8. 9.
O Millim. “Millim. Millim. “Millim. Millim. “Millim. Millim. | “Mitim. Millim. Milli.
0 610077110200 12 0208)|. 0.04 | 0:050 | £006 \|. 0208 | 0.0907) O00 N04
1 0.13 “| O14 «| 0.45.) 0.16) | Ose 019" | 0:20 °)): 0.20) | (028 an 0:24
2 0.25. | 0.26. | 0.28 | (0.29. | -0.30 | 0.81" | 0.93" |) 03340)|. 0185, | 0186
3 0.38 | 0.39 | 0.40 | 0.41 | 0.43 | 0.44 | 0.45 | 0.46 | 0.48 | 0.49
4 || 0.50 | 0.51 | 0.53 | 0.54 | 0.55 | 0.56 | 0.58 | 0.59 | 0.60 | 0.61
5 0.63. | 0.64. |. 0.65 +| 0:66 | 0:68) | 0691-|) 0.70. | 0.7001) O173.0 0.74
6 0.75 | 0.76 | 0.78 | 0.79 | 0.80 | 0.81 | 0.83 | 0.84 | 0.85 | 0.86
7 || 0.88 | 0.89 | 0.90 | 0.91 | 0.93 | 0.94 | 0.95 | 0.96 | 0.98 | 0.99
8 1.00 | 1.01 1.03 | 1.04 105° 1: °1.06.8)|" 1208, © ||| 109;8|> aos rea
9 eis 4 Wea | ts 2 a tase | TA9.)|) $1.20.) 1-20) 8|| e123\h pees
10 1.25 | 1.26 | 1.28 | 1.29 1.30) | 1.81 1:33 7) 11.9424 B60) ese
11 1.38 | 1.39 | 1.40 | 1.41 12450 0 Daa ell CaaS C0 VAG le as or deo
12 1.50.11 1.60.1) | Wee S el eee Is) tebe Wh 56 1) } 5S 82 T5Os Nl eeGO vel aeer
13 1.63.4) 0:66.01 0265-11 1-662 /0 AGS i 1.69.0 || 270s ea eels er
14 1759.9) 7G.) WS tl 1.79 1.80 | 1.81 T:83. # | (41264) 0 | 2h085 eee
15 1.88 ‘| 1.89 | 1.90] 1.91 1.93 | 1.94 | 1.95 | 1.96 | 1.98 | 1.99
16 || 2.00 | 2.01 | 2.03 | 2.04 | 2.05 | 2.06 | 2.08 | 2.09 | 2.10 | 2.11
17 9.18 | 2.14.1 | 2.150] 2.16.1 2:18] 2.19.) 2.20 | 2.91.° | 2/08.<|)" 2.24
18 2.25 | 2.096 | 2.28 | 2.29 | 2.30 | 2.31 2.83°| 2.34.\| 2.35. °|' 2.36
19 || (2.38) '2.39..)| | 2240.4 2 2:47 2.48 | 2.44 | 2.45 | 2.46 | 2.48 | 2.49
20 2.50 | 2.51 | 2.53 | 2.54 | 2.55 | 2.56 | 2.68 | 2.59 | 2.60 | 2.61
21 2.63 | 2.64 | 2.65 | 2.66 | 2.68 | 2.69 | 2.70 | 2.71 | 2.73 | 2.74
22 2.75 | 2.76 | 2.78 | 2.79 | 2.80 | 2.81 | 2.88 | 2.84 | 2.85 | 2.86
23 2.88 | 2.89 | 2.90 | 2.91 | 2.93 | 2.94 | 2.95 | 2.96 | 2.98 | 2.99
24 3.00 | 3:01. |. 803. | 304. |12 3.05 1) 3.06 “|| 3.08% |' (S209. "|| 9510.0 saan.
25 318 | \3.14.|) 8.15. |. 3-16 2|) 88°] 319.0 8.20" |. )s.21-8 | s.280)linetea
26 3.25 | 3.26 | 3.28 | 3.29 | 3.30 |] 3.31 | 3.33 | 3.84 | 3.85 | 3.36
27 3.38 | 3.39 | 3.40 | 3.41 3.43 | 3.44 |. 3.45 | 3.46 °| 3.48" |) 3.49
28 3.50 | 3.51 | 3.53 | 3.54 | 3.55 | 3.56 | 3.58 | 3.59 | 3.60. | 8.61
29 3.63. | 3.64. | 3.65 | 3.66. | 3.68 | 3.69 | 3.70 | 3.72 | 3.73 | 3.74
30 3.75. |, 3.77 |: 3.78- |) 3-79 18.80 | 3.82 | 3.88. |\13'84 1113.65.01 83.87
31 3.88 | 3.89 | 3.90 | 3.92 | 3.93 | 3.94 | 3.95 | 3.97 | 3.98 | 3.99
32 4.00 4.02 4.03 4.04 4.05 4.07 4.08 4.09 4.10 4.12
33 413. | 4.14. |) 405. <1 ari alt Aase |) 4.09. ||| “490 |) pacoo ml ees a egon
- 34 4.25 | 4.27 | 428 | 4.29 | 4.30 | 4.32 | 4.88 | 4.84 | 4.35 | 4.87
35 4.38 4.39 4.40 4.42 4.43 4.44 4.45 4.47 4.48 4.49
0. i. 2. che 4. de 6. Yr 8. 9. |
c 116

REDUCTION O03 THE BAROMETER TO THE FREEZING POINT. 323

peers: ain a

| BAROMETER: 780" (from 777.51 to 782.50).

Centi-
grade Tenths of Degrees.
Degrees.
0. 1. 2. Be 4. De 6. T 8. 9.
O Millim. | Millim. | Millim. | Millim. Millim. | Millim Millim. | Millim. | Millim. | Millim,
0 0.00 0.01 0.03 0.04 0.05 0.06 0.08 0.09 0.10 0.11
1 0.13 0.14 0.15 0.16 0.18 0.19 0.20 0.21 0.23 0.24
2 0.25 0.26 0.28 0.29 0.30 0.31 0.33 0.34 0.35 0.37
3 0.38 0.39 0.40 0.42 0.43 0.44 0.45 0.47 0.48 0.49
4 0.50 0.52 0.53 0.54 0.55 0.57 0.58 0.59 0.60 0.62
5 0.63 0.64 0.65 0.67 0.68 0.69 0.70 0.72 0.73 0.74
6 0.76 0.77 0.78 0.79 0.81 0.82 0.83 0.84 0.86 0.87
t 0.55 0.89 0.91 0.92 0.93 0.94 0.96 0.97 0.98 0.99
8 1.01 1.02 1.03 1.04 1.06 1.07 1.08 1.10 ate Lau
9 1.13 1.15 1.16 Voy, 1.18 1.20 1.21 .- 1.22 1.23 1.25
10 1.26 pri 1.28 1.30 1.31 1.32 1.33 1.35 1.36 1.37
11 1.38 1.40 1.41 1.42 1.44 1.45 1.46 1.47 1.49 1.50
12 1.51 1.52 1.54 1.55 1.56 5a 1.59 1.60 1.61 1.62
tl) 18 1.64 1.65 1.66 1.67 1.69 1.70 1.71 1.72 1.74 1.75
14 1.76 1.78 Leo 1.80 1.81 1.83 1.84 1.85 1.86 1.88
15 1.89 1.90 1.91 1.93 1.94 1.95 1.96 1.98 1.99 2.00
16 2.01 2.03 2.04 2.05 2.06 2.08 2.09 2.10 2.11 2.13 |
17 2.14 2.15 2.17 2.18 2.19 2.20 2.22 2.23 2.24 2.25
18 2.27 2.28 2229 2.30 Deon 2.33 2.34 2.00 PB 2.38
19 2.39 2.40 2.42 243 2.44 2.495 2-47 2.48 2.49 2.51
20 2.52 2.53 2.54 2.56 2.570 2.58 2.59 2.61 2.62 2.63
21 2.64 2.66 2.67 2.68 2.69 Zeal 2.72 aries 2.74 2.76
22 2007 2.78 2.79 2.81 2.82 2.83 2.85 2.86 2.87 2.88
ils 2.90 2.91 2.92 2.93 2.95 2.96 2.97 2.98 3.00 3.01
24 3.02 3.03 3.05 3.06 3.07 3.08 3.10 3.11 3.12 3-14
25 8.15 3.16 3-17 3.19 3.20 3.21 3.22 3.24 3.25 3.26
26 Seek 3.29 3.30 3.31 3.32 3.34 3.35 3.36 3.37 3.39
20 3.40 3-41 3.42 3.44 3.45 3.46 3.47 3.49 3.50 3.51
| 28 S02 3.54 3.55 3.56 3.58 3.59 3.60 3.61 3-63 3.64
29 3.65 3-66 3.68 3.69 3.70 3.71 3-73 3.74 3.75 5.76
30 3.78 3.79 3.80 3.81 3.83 3.84 3.85 3.86 3.88 3.89
31 3.90 3.92 3.93 3.94 3-95 3.97 3.98 3.99 4.00 4.02
32 4.03 4.04 4.05 4.07 4.08 4.09 4.10 4.12 4.13 4.14
| oe 4.15 4.17 4.18 4.19 4.20 4.22 4.23 ; 4.24 4.26 4.27
34 4.28 4.29 4.31 4.32 4.33 4.34 4.36 4.37 4.38 4.39
35 4.41 4.42 4.43 4.44 4.46 4.A7 4.48 4.49 4.51 4.52
| o 1. BPr lege ah oe | é 7 | Ss ei
I |

CG ; 117

|
|
|

BAROMETER: 785"™™ (from 782.51 to 787.50).

Centi:
grade
Degrees.
0. 1.
S Millim. | Millim.
0 0.00 0.01
1 0.13 0.14
2 0.25 0.27
3 0.38 0.39
4 0.51 0.52
5 0.63 0.65
6 0.76 0.77
7 0.89 0.90
8 1.01 1.03
9 1.14 1.15
10 Ne2G 1.28
11 1.39 1.41
12 1.52 1.53
13° 1.65 1.66
14 Lie 1.79
15 1.90 1.91
16 2.03 2.04
17 2.15 2G
18 2.28 2.29
19 2.41 2.42
20 2.53 2.55
21 2.66 2.67
22 2.79 2.80
23 2.91 2.93
24 3.04 3.05
25 3.17 3.18
26 3.29 3.31
27 3042 3.43
28 3.55 3.56
29 3.67 3.69
30 || 3.80 | 3.81 |
831 3.93 3.94 |
32 || 4.05 | 4.07 |
33 4.18 4.19
34 4.31 4.32
35 4.43 4.45
| 0. 1.

Millim.
0.03

0.15
0.28
0.41
0.53
0.66

0.79
0.91
1.04
1.17
1.29

1.42
1.55
1.67
1.80
1.93

2.05
2.18
2.31
2.43
2.56

2.69
2.81
2.94
3.07
3.19

3.32
3.45
3.57
3.70
3.85

3.95
4.08
4.21
4.33
4.46

2,

Millim.

0.04

0.16
0.29
0.42
0.54
0.67

0.80
0.92
1.05
1.18
1.30

1.438
1.56
1.69
1.8]
1.94

2.07
2.19
2.32
2.45
2.57

2.70
2.83
2.95
3.08
3.21

3.33
3.46
3.59
3.71
3.84

3.97
4.09
- 4.22
4.35
4-47

de

Tenths of Degrees.

4. 5d.
Millim. | Millim.
0.05 0.06
0.18 0.19
0.30 0.32
0.43 0.44
0.56 0.57
0.68 0.70
0.81 0.82
0.94 0.95
1.06 1.08
1.19 1.20
1.32 1.33
1.44 1.46
157 1.58
1.70 Vee
1.82 1.84
1.95 1.96
2.08 2.09
2.20 2.22
2500 2.34
2.46 2.47
2.58 2.60
raf 242,
2.84 2.85
2.96 2.98
3.09 3.10
3.22 3.23
3.34 3.36
3.A7 3.48
3.60 3.61
3.72 3.74
3.85 3.86
3.98 3.99
4.11 4.12
4.23 4.24
4.36 4.37
4.49 4.50
4. 5d.

6. 7
Millim. Millim.
0.08 0.09
0.20 0.22
0.33 0.34
0.46 0.47
0.58 0.60
0.71 0.72
0.84 0.85
0.96 0.98
1.09 1.10
1.22 1.23
1.354 1.36
1.47 1.48
1.60 1.61
1.72 1.74
1.85 1.86
1.98 1.99
2.10 2.12
2.23 2.24
2.36 2.37
2.48 2.50
2.61 2.62
2.74 2.75
2.86 2.88
2.99 3.00
3.12 3.13
3.24 3.26
3.37 3-38
3.50 3.51
3.62 3.64
3.75 3.76
3.88 3.89
4.00 4.02
4.13 4.14.
4.26 4.27
4.38 4.40
4.51 4.52
6. Ze

Millim,

0.10

0.23
0.35
0.48
0.61
0.73

0.86
0.99
1.11
1.24
1.37

1.50
1.62
1.75
1.88
2.00

2.13
2.26
2.38
2.51
2.64

2.76
2.89
3.02
3.14
3.27

3.40
3.52
3.65
3.78
3.90

4.03
4.16
4.28
4.41
4.54

8.

Millim.

0.11

0.24
0.37
0.49
0.62
0.75

0.87
1.00
1.13
1.25
1.38

1.51
1.63
1.76
1.89
2.01

2.14
2.27
2.39
2.52
2.65

2.77
2.90
3.03
3.15
3.28

3.41
3.53
3.66
3.79
3.91

4.04
4.17
4.30
4.42
4.55

—————

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 325

MPP ra ea eT

| BAROMETER: 790"™ (from 787.51 to 792.50). |
| Centi-
grade Tenths of Degrees.
Degrees.
0. i. oe de 4. De 6. 7% 8. 9.
° Millim. “Millim, Millim, “Millim. Millim “Millim, Millim. “Millim. Millim: Millim.
0 0.00 0.01 0.03 0.04 0.05 0.06 0.08 0.09 0.10 0.11
1 0.13 0.14 0.15 0.17 0.18 0.19 0.20 0.22 0.23 0.24
2 0.26 0.27 0.28 0.29 0.31 0.32 0.33 0.34 0.36 0.37
3 0.38 0.40 0.41 0.42 0.43 9.45 0.46 0.47 0.48 0.50
4 0.51 0.52 0.54 0.55 0.56 0.57 0.59 0.60 0.61 0.62
5 0.64 0.65 0.66 0.68 0.69 0.70 0.71 0.73 0.74 0.75
6 0.77 0.78 0.79 0.80 0.82 0.83 0.84 0.85 0.87 0.88
7 0.89 0.91 0.92 0.93 0.94 0.96 0.97 0.98 0.99 1.01
8 1.02 1.03 1.05 1.06 1.07 1.08 1.10 1.11 1.12 1.13
9

1.15 1.16 1.17 1.19 1.20 1.21 1.22 1.24 1.25 1.26
10 1.28 1.29 1.30 1.31 1.33 1.34 1.35 1.36 1.38 1.39

ll 1.40 1.42 1.43 1.44 1.45 1.47 1.48 1.49 1.50 1.52
12 1.53 1.54 1.56 1.57 1.58 1.59 1.61 1.62 1.63 1.64
13 1.66 1.67 1.68 1.70 1.71 1.72 1.73 1.75 1.76 1.77
14 1.79 1.80 1.81 1.82 1.84 1.85 1.86 1.87 1.89 1.90
15 1.91 9S 1.94 1.95 1.96 1.98 1.99 2.00 2.01 2.03

16 2.04 2.05 2.07 2.08 2.09 2.10 2.12 2.13 2.14 2.15
17 2.17 2.18 2.19 2.21 2.22 2.23 2.24 2.26 2.27 2.28
18 2.30 2.31 2.32 2.33 2.35 2.36 2.37 2 38 2.40 2.41
19. || 2.42 2.44 2.45 2.46 2.47 2.49 2.50 2.51 2.52 2.54
20 2.55 2.56 2.58 2.59 2.60 2.61 2.63 2.64 2.65 2.66

21 2.68 | 2.69 | 2.70 | 2.72 | 2.73 | 2.74 | 2.75 | 2.77 | 2.78 | 2.79
22 || 2.81 | 2.82 | 2.83 | 2.84 | 2.86 | 287 | 2.88 | 2.89 | 2.91 | 2.92
23 || 2.93 | 2.95 | 2.96 | 2.97 | 2.98 | 3.00 | 3.01 | 3.02 | 3.03 | 3.05
Sarl 06. | S07 || sos.|| S10.) Sanh saa | saa | sins |) swe |) stI7
25 || 3.19 | 3.20 | 3.21 | 3.23 | 3.24 | 3.25 | 3.26 | 3.28 | 3.29 | 3.30

26 3.32 3.33 3.34 3.35 3.37 3.38 3.39 3.40 3-42 3.43
27 3.44 3.46 3.47 3.48 3.49 3.51 3.52 3.53 3.54 3.56
28 3.57 3.58 3.60 3.61 3.62 3.63 3.65 3.66 3.67 3.68
29 3.70 3.71 3.72 3-74 3.75 3.76 3.77 3.79 3.80 3.81
30 3.83 3.84 3.85 3.86 3.88 3.89 3.90 3.91 3.93 3.94

3.95 3.97 3.98 3.99 4.00 4.02 4.03 4.04 4.05 4.07
32 4.08 4.09 4.11 4,12 4.13 4.14 4.16 4.17 4.18 4.19
33 4.21 4.22 4.23 4.25 4.26 4.27 4.28 4.30 4.31 4.32
34 4.34 4.35 4.36 4.37 4.39 4.40 4.41 4.42 4.44 4.45
35 4.46 4.48 4.49 4.50 4.51 4.53 4.54 4.55 4.56 4.58

us
—_

| 0. 1. 2. 3. 4. 5. 6. %. 8. 9 |
| 3 4

co
Ww
Se

—————————

REDUCTION OF THE BAROMETER TO THE FREEZING POINT.

a

BAROMETER: 795™" (from 792.51 to 797.50).

|
\
Centi- ° |
grade Tenths of Degrees. |
Degrees.
0. i. 2. Be 4. de 6. 7G 8. 9.
o Milli. | Millim, | Millim. | Millom. | Milli. J Millim. | Millim. | Millim. | Millim. | Millim.
0 0.00 0.01 0.03 0.04 0.05 0.06 0.08 0.09 0.10 0.12
1 0.13 0.14 0.15 0.17 0.18 0.19 0.21 0.22 0.23 0.24
2 0.26 0.27 0.28 0.30 0.31 0.32 0.33 0.35 0.36 0.37
3 0.38 0.40 0.41 0.42 0.44 0.45 0.46 0.47 0.49 0.50
4 0.51 0.53 0.54 0.55 0.56 0.58 0.59 0.60 0.62 0.63
5 0.64 0.65 0.67 0.68 0.69 0.71 0.72 0.73 0.74 0.76 ||
6 0.77 0.78 0.80 0.81 0.82 0.83 0.85 0.86 0.87 0.89
Hl, 0.90 0.91 0.92 0.94 0.95 0.96 0.98 0.99 1.00 1.01
8 1.03 1.04 1.05 1.06 1.08 1.09 1.10 1.12 1.13 1.14
9 1.15 1.17 1.18 1.19 1.21 1.22 1.23 1.24 1.26 1.27
10 1.28 1.30 1.31 1.32 1.33 1.35 1.36 1.37 1.39 1.40 |
11 1.41 1.42 1.44 1.45 1.46 1.48 1.49 1.50 1.51 1.53
12. 1.54 1.55 1.57 1.58 1.59 1.60 1.62 1.63 1.64 1.66
13 1.67 1.68 1.69 1.71 1.72 1.73 1.75 1.76 1.77 1.78
14 1.80 1.81 1.82 1.83 1.85 1.86 1.87 1.89 1.90 1.91
15 1.92 1.94 1.95 1.96 1.98 1.99 2.00 2.01 2.03 2.04
16 2.05 2.07 2.08 2.09 2.10 2.12 2.13 2.14 2.16 2.17
17 2.18 2-19 2.21 2.22 2.23 2.25 2.26 227, 2.28 2.30
18 2.31 2.32 2.34 2.35 2.36 2.37 2.39 2.40 2.41 2.43
19 2.44 2-45 2.46 2.48 2.49 2.50 2.51 2.53 2.54 2.55
20 2.57 2.58 2.59 2.60 2.62 2.63 2.64 2.66 2.67 2.68
21 2.69 2.71 2.72 2.73 2.75 2.76 2.77 2.78 2.80 2.81
22 2.82 2.84 2.85 2.86 2.87 2.89 2.90 2.91 2.93 2.94
23 2.95 2-96 2.98 2.99 3.00 3.02 3.03 3.04 3.05 3.07
24 3.08 3.09 3.11 3.12 3.135 3.14 3-16 3.17 3.18 3.19
25 3-21 3.22 3-23 3.25 3.26 3.27 3.28 3.30 3.31 3.32
{| - 26 3.34 3.35 3.36 3.37 3.39 3.40 3-41 3.438 3.44 3.45
| 27 3.46 3.48 3.49 3.50 3.52 3.53 3-54 3.55 3.57 3.58
| 28 3.59 3.61 3.62 3.63 3.64 3.66 3.67 3.68 3.70 3.71
29 3.72 3-73 3.75 3-76 3.77 3.79 3-80 3.81 3.82 5.84
30 3.85 3.86 3.88 5.89 3.90 3.91 3-93 3.94 3.95 3.96 |
3] 3.98 3.99 4.00 4.02 4-03 4.04 4.05 4.07 4.08 4.09 ||
| 82 4.11 4.12 4.13 4.14 4.16 4.17 4.18 4.20 4.21 4.22
| 33 4.23 4.25 4.26 4.27 4.29 4.30 4.31 4.32 4.34 4.35 |
| 34 4.36 4.38 4.39 4.40 4.41 4.43 4.44 4.45 4.47 4.48
| 35 4.49 4.50 4.52 4.53 4.54 4.56 4.57 4.58 4.59 4.61
| ee = es c = 2 =
| 0. 1. 2. 3. a. | 5. 6. 7. 8. 9.
= aa aS
C 120

16 2.07 2.08 2.09 2.10 2.12 2.13 2.14 2.16 2.17 2.18
ez 2.20 2.21 2.22 2.23 2.25 2.26 2.27 2.29 2.30 2.31
18 2.32 2.34 2.35 2.36 2.38 2.39 2.40 2.41 2.43 2.44
19 2.45 2.47 2.48 2.49 2.50 2.52 2.53 2.54 2.56 2.57
20 2.58 2.60 2.61 2.62 2.63 2.65 2.66 2.67 2.69 2.70

21 2.71 2.72 2.74 2.75 2.76 2.78 2.79 2.80 2.81 2.83
22 2.84 2.85 2.87 2.88 2.89 2.91 2.92 2.93 2.94 2.96
23 2.97 2.98 3.00 3.01 3.02 3.03 3.05 3.06 3.07 3.09
24 3.10 3.11 3.12 3.14 3.15 3.16 3.18 3.19 3.20 3.22

REDUCTION OF THE BAROMETER TO THE FREEZING POINT. 327
BAROMETER: 800"™ (from 797.51 to 802.50). |
Centi- |
| grade Tenths of Degrees.
| Negrees, |
| Of weenie a es aaa ie Ge % s. 9.
| |
iD Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim. | Millim.
0 0.00 0.01 0.03 0.04 | 0.05 0.06 0.08 0.09 0.10 0.12
1 0.13 0.14 0.15 0.17 0.18 0.19 0.21 0.22 0.23 0.25
2 0.26 0.27 0.28 0.30 0.31 0.32 0.34 0.35 0.36 0.37
3 0.39 0.40 0.41 0.43 0.44 0.45 0.46 0.48 0.49 0.50
4 0.52 0.53 0.54 0.56 0.57 0.58 0.59 0.61 0.62 0.63
5 0.65 0.66 0.67 0.68 0.70 0.71 0.72 0.74 0.75 0.76
6 0.77 0.79 0.80 0.81 0.83 0.84 0.85 0.87 0.88 0.89
7 0.90 0.92 0.93 0.94 0.96 0.97 0.98 0.99 1.01 1.02
8 1.03 1.05 1.06 1.07 1.08 1.10 1.11 1.12 1.14 1.15
9 1.16 1.17 1.19 1.20 1.21 1.23 1.24 1.25 M27 1.28
10 1.29 1.30 1.32 1.33 1.34 1.36 1.37 1.38 1.39 1.41
11 1.42 1.43 1.45 1.46 1.47 1.48 1.50 1.51 1.52 1.54
12 1.55 1.56 1.58 1.59 1.60 1.61 1.63 1.64 1.65 1.67
13 1.68 1.69 1.70 Warr 1.73 1.74 1.76 1.77 1.78 1.79
14 1.81 1.82 1.83 1.85 1.86 1.87 1.89 1.90 1.91 1.92
15 1.94 1.95 1.96 1.98 1.99 2.00 2.01 2.03 2.04 2.05

25 3.23 3.24 3.25 3.27 3.28 3.29 3.31 3.32 3.33 3.34

26 3.36 3.37 3.38 3.40 3.41 3.42 3.43 3-45 3.46 3.47
27 3.49 3.50 3.51 3.52 3.54 3.55 3.56 3.58 3.59 3.60
28 3.62 3.63 3.64 3.65 3.67 3.68 3.69 3.71 3.72.7] Sale
29 3.74 3.76 3.77 3.78 3.80 3.81 3.82 3.83 3.85 3.86
30 3.87 3.89 3.90 3.91 3.93 3.94 3.95 3.96 3.98 3.99

a

31 4.00 4.02 4.03 4.04 4.05 4.07 4.08 4.09 4.11 4,12
32 4.13 4.14 4.16 4.17 4.18 4.20 4.21 4.22 4.24 4.25
33 4.26 4.27 4.29 4.30 4.31 4.33 4.34 4.35 4.36 4.38
34 4.39 4.40 4.42 4.43 4.44 4.45 4.47 4.48 4.49 4.55
35 4.52 4.53 4.55 4.56 4.57 4.58 4.60 4.61 4.62 4.64

0. i. 2. 3. 4. 5. 6. 7 8. 9.

SSS SS

__—_—_—

C 121

ee ep eae

=

Ss : ee z
pac t l : a s Ted Coy ee, te te eA” — “ / >
5 i kb : ‘ ‘ 5 Ai :
¢ fk : s = , t +e
m= ie had ; ; Tiel Sa te = z 7 e oe 7 Feel te ;
bs fhe : ‘ . wo Fora. A
f o = 4 ¢ . Et a ; or f - ae
+ é i : - =
Cen o I t iu
a — j - » Me & fs ‘ * ies a
a> faz | = i ¥ i ‘ c= % ¥ ; :
ia me) ‘ & 3 bk “0 x *
= = a t - ‘ .
Be piney fi ' 1
F nw “ “ = oo rv - = a 7
re a | ' = s = 7
ze ie i + ¥ =
E a ee ~—- 3 d =
: ; t . DA
ve \ t / t
; i i Ws : ' ’ i
rt : rihe tes - :
= ( , 2 a5 oo
- = ' tee ba y
t } : : = - a 3 j
7 2 { ci * { wet j >. ,
ts f z:
i ; a Falk 7 yu © ae :
io i - Sc pes ce ap eateeaaaglcasineen ti
‘ i be (tes , : ¥
; 3 mH Sk ¥ Say = € : é ij a 7
5 ‘
j . _ An =~ 5 « 5 se ” =
9
7 i > . re
‘
€ : : = =o & ba + 4 5 é
. : = c ‘ : 4 z S wa CE
‘ re aha
x et a > +
7 Yi. eds Et Ca BV fs rts lect aly .
- é a Se hee emcees 5S x tein ee Sinan i ae nt nt areca rr i tnt psn papas cameo
« 3 SiS > : & + a om it = s
c . u 6) ak aie
. * ~ 4 '
: i si ‘ og 1 4 ; a te eS ee ES t t
3 ; Sn es pe aa a a ee Oa ee pt ae oe ee :
Ge 2 = : :
: 4 . ,

Xe:

OLD FRENCH BAROMETER.

AeAw by sll
REDUCING TO THE FREEZING POINT THE OBSERVATIONS
TAKEN WITH OLD FRENCH BAROMETERS,
PROVIDED WITH BRASS SCALES, EXTENDING FROM THE CISTERN TO THE
TOP OF THE MERCURIAL COLUMN}; CALCULATED FROM 240 TO 345

LINES, OR FROM 23 INCHES 4 LINES TO 28 INCHES 9 LINES.

By Kaemrz.

330

TABLE Ox

This table is taken from Kazmrz’s Lehrbuch der Meteorologie, Vol. Il. p. 236.
To render it more useful, the first page, giving the corrections for Barometrical
Heights between 240 and 280 Paris lines, has been added.

The values adopted by Kaemtz for reducing the Old French Barometer are the
following : —

Let h = observed height in French lines.

‘“*« ¢ = temperature of attached thermometer in degrees of Reaumur.
“¢ m = expansion of mercury between 0 and 80° Reaumur = 0.018018.
*¢ ~ = linear expansion of brass between 0 and 80° Reaumur = 0.0018782.

The normal temperature of standard being = 13° Reaumur.

And the formula becomes, —
mx t—l(t—13)
l+mxXt
The Table gives the corrections only for full degrees and for every fifth line ; but

—h.

the intermediate values can easily be found by an interpolation at sight.

Example of Reduction.

Observed height . s : 3 ; 5 = 325.32 lines.
Attached thermometer . ; ; : ; = 12.5 Reaumur.
In the line beginning with 12°, and in the vertical column headed 32% tines,
we find, Correction for 12° = —0.89 lines.
Interpolation for 0°.5 = —0.03 *
Correction for 12°.5 =—0.92 *
And we have,
Observed height, 325.32 “*
Correction for 12°.5, —0.92

Height at the freezing point = 324.40 lines.

Ca

124

XXI.

Normal Temperature of the Scale = 18° Reaumur.

SSS ==
Attached Barometer in Paris Lines.
Thermom-
eter. s aa-2eti|
Reaunur | 240 | 245 | 250 | 255 | 260 | 265 | 270 | 275
oO Par. Lines. Par Lines.|Par. Lines, Par. Lines.|Par. Lines. |Par. Lines. Par. Lines.|Par. Lines.
—15 +0.65 +0.66 +0.68 +0.69 +0.70 +0.72 +0.73 +0.75
-14 0.60 0.61 0.63 0.64 0.65 0.67 0.68 0.69
—-13 0.55 0.57 0.58 0.59 0.60 0.61 0.62 0.64
—12 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58
-l11 0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.52
—10 0.41 0.42 0.43 0.44 0.44 0.45 0.46 0.47
-9 +0.36 +0.37 +0.38 +0.38 +0.39 +0.40 +0.41 +0.41
-8 0.31 0.32 0.33 0.33 0.34 0.35 0.35 0.36
— 7 0.27 0.27 0.28 0.28 0.29 0.29 0.30 0.30
— 6 0.22 0.22 0.23 0.23 0.24 0.24 0.24 0.25
-5 0.17 0.17 0.18 0.18 0.18 0.19 0.19 0.19
-4 +0.12 +0.12 +0.13 +0.13 +0.13 +0.13 +0.14 +0.14
-3 0.07 0.07 0.08 0.08 0.08 0.08 0.08 0.08
— 2 +0.02 +0.03 +0.03 +0.03 +0.03 +0.03 +0.03 +0.03
-1 —0.02 —0.03 —0.03 —0.03 —0.03 —0.03 —0.03 —0.03
0 —0.07 —0.07 —0.08 —0.08 —0.08 —0.08 —0.08 —0.08
+1 —0.12 —0.12 sr(alies —0.13 =O-13 =Orls —0.14 —0.14
2 0.17 0.17 0.18 0.18 0.18 0.19 0.19 0.19
3 0.22 0.22 0.23 0.23 0.24 0.24 0.24 0.25
4 0.27 0.27 0.28 0.28 0.29 0.29 0.30 0.30
5 9.31 0.32 0.33 0.33 0.34 0.35 0.35 0.36
+ 6 —0.36 —0.37 —0.38 —0.38 —0.39 —0.40 —0.41 —0.41
U 0.41 0.42 0.43 0.44 0.44 0.45 0.46 0.47
8 0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.52
9 0.51 0.52 0.53 0.54 0.55 0.56 0.57 0.58
10 0.55 0.57 0.58 0.59 0.60 0.61 0.62 0.64
+11 —0.60 —0.61 —0.63 —0.64 —0.65 —0.67 —0.68 —0.69
12 0.65 0.66 0.68 0.69 0.70 0.72 0.73 0.75
13 0.70 0.71 0.73 0.74 0.76 0.77 0.79 0.80
14 0.75 0.76 0.78 0.79 0.81 0.82 0.84 0.86
15 0.80 0.81 0.83 0.84 0.86 0.88 0.89 0.91
+16 —0.84 —0.86 —0.88 —0.90 —0.91 —0.93 —0.95 —0.97
17 0.89 0.91 0.93 0.95 0.97 0.98 1.00 1.02
18 0.94 0.96 9.98 1.00 1.02 1.04 1.06 1.08
19 0.99 1.01 1.03 1.05 1.07 1.09 1.11 1.13
20 1.04 1.06 1.08 1.10 1.12 1.14 1.17 EAS
+21 —1.08 —1.11 —1.13 —1.15 —1.17 —1.20 lle —1.24
22 1.13 1.16 1.18 1.20 1.23 1.25 1.27 1.30
23 1.18 1.20 1.23 1.25 1.28 1.30 1.33 1.35
24 1.23 1.25 1.28 1.31 1.33 1.36 1.38 1.41
25 1.28 1.30 1-337. 1.36 1.38 1.41 1.44 1.46

REDUCTION OF THE OLD FRENCH BAROMETER TO THE FREEZING POINT. 331

Attached
Thermom-
eter.

Degrees of
Reaumur.

°
—15
—l4
—13
—12
et
—10

|
Aran eo

4
3
—2
1
0

+21

392

Attached
Thermom-
eter.

Degrees of
Reaumur.

ao fF Wh =

oman

+11
12
13
14
15

+16
a
18
19
20

+21

———
no
oo

REDUCTION OF THE OLD FRENCH BAROMETER TO THE FREEZING POINT.

280

Par Lines.
+0.77
0.71
0.65
0.60
0.54
0.48

+0.43
0.37
0.31
0.26
0.20

+0.14

0.09
+0.03
—0.03
—0.08

—0.14
0.20
0.26
0.31
0.37

—0.43
0.48
0.54
0.60
0.65

—0.71
0.77
0.82
0.88
0.94

=0:99
1.05
1.11
1.16
1.22

—1.28
1.34
1.39
1.45
1.50

Normal Temperature of the Scale = 13° Reaumur.

Barometer in Paris Lines.

285

Par. Lines.
+0.78
0.73
0.67
0.61
0.55
0.49

+0.44
0.38
0.32
0.26
0.20

+0.15

0.09
+0.03
—0.03
—0.09

—0.14
0.20
0.26
0.32

. 0.37

—0.43
0.49
0.55
0.61
0.66

—0.72
0.78
0.84
0.90
0.95

—1.01
1.07
1.13
1.18
1.24

—1.30
1.36
1.41
1.47
1.53

290

Par. Lines,
+0.79
0.74
0.68
0.62
0.56
0.50

+0.44
0.38
0.32
0.26
0.21

+0.15

0.09
+0.03
—0.03
—0.09

—0.15
0.21
0.27
0.32
0.38

—0.44
0.50
0.56
0.62
0.68

—0.74
0.80
0.85
0.91
0.97

—1.03
1.09
1.15
1.21
1.27

—1.33
1.38
1.44
1.50
1.56

295

Par. Lines.

+0.81
0.75
0.69
0.63
0.57
0.51

+0.45
0.39
0.33
0.27
0.21

+0.15

0.09
+0.03
—0.03
=():09)

—0.15
0.21
0.27
0.33
0.39

—0.45
0.51
0.57
0.63
0.69

—0.75
0.81
0.87
0.93
0.99

—1.05
1.11
1.17
1.23
1.29

—1.35
1.41
1.47
1.53
1.59

Par. Lines.
+0.82
0.76
0.70
0.64
0.58
0.52

+0.46
0.40
0.34
0.27
0.21

+0.15

0.09
+0.03
—0.03
—0.09

—0.15
0.21
0.27
0.33
0.40

—0.46
0.52
0.58
0.64
0.70

—0.76
0.82
0.88
0.94
1.00

-1.07
1.13
1.19
1.25
1.31

—1.37
1.43
1.49
1.55
1.61

126

305

Par. Lines.

+0.84
0.77
0.71
0.65
0.59
0.53

+0.46
0.40
0.34
0.28
0.22

+0.16

0.09
+0.03
—0.03
—0.09

—ON15
0.22
0.28
0.34
0.40

—0.46
0.53
0.59
0.65
0.71

—0.77
0.84
0.90
0.96
1.02

—1.08
TSS
1.21
1.27
1.33

—1.39
1.45
1.52
1.58
1.64

Par. Lines.

310

+0.85
0.79
0.72
0.66
0.60
0.54

+0.47
0.41
0.35
0.28
0.22

+0.16

0.09
+0.03
—0.03
—0.09

—0.16
0.22
0.28
0.35
0.41

—0.47
0.53
0.60
0.66
0.72

—0.79
0.85
0.91
0.98
1.04

1.10
1.16
1.23
1.29
1.35

—1.42
1.48
1.54
1.60
1.67

Attached
Thermom-
eler.

Degrees of
Reaumur.

|
eS

oF WO HO =

ov non Sd

a

+16
17
18
19
20

+21
22
23

Attached
Thermom-
eter.

REDUCTION OF THE OLD FRENCH BAROMETER TO THE FREEZING POINT. 833

Normal Temperature of the Scale = 13° Reaumur.

Barometer in Paris Lines,

Peel sas 325 | 330 335
O Par, Lines. | Par. Lines, | Par. Lines.|} Par. Lines. | Par. Lines,
—-15 +0.86 +0.88 +0.89 +0.90 +0.92
—14 0.80 0.81 0.83 0.84 0.85
-13 0.74 0.75 0.76 0.78 0.78
—12 0.67 0.68 0.69 0.70 0.71
—11 0.61 0.62 0.63 0.64 0.65
-—10 0.54 0.55 0.56 0.57 0.58
—9) +0.48 +0.49 +0.50 +0.50 +0.51
-8 0.42 0.42 0.43 0.44 0.44
—7 0.35 0.36 0.36 0.37 0.37
—6 0.29 0.29 0.30 0.30 0.31
aes 0.22 0.23 0.23 0.24 0.24
—4 +0.16 +0.16 +0.17 +0.17 +0.17
ied 0.10 0.10 0.10 0.10 0.10
= 4 +0.03 +0.03 +0.03 +0.03 +0.03
and —0.03 —0.03 —0.03 —0.03 —0.03
0 —0.10 —0.10 —0.10 —6.10 —0.10
+ 1 —0.16 —0.16 | —0.16 —0.17 —0.17
2 0.22 0.23 0.23 0.23 0.24
3 0.29 0.29 0.30 0.30 0.31
4 0.35 0.36 0.36 0.37 0.37
5 0.42 6.42 0.43 0.44 0.44
+6 —0.48 —0.49 | —0.49 —0.50 -0.51
7 0.54 0.55 0.56 0.57 0.58
8 0.61 0.62 0.63 0.64 0.65
9 0.67 0.68 0.69 0.70 0.71
10 0.74 0.75 0.76 0.77 0.78
+11 —0.80 —0.81 —0.82 —0.84 —0.85
12 0.86 0.88 0.89 0.90 0.92
13 0.93 0.94 0.96 0.97 0.99
14 0.99 1.01 1.02 1.04 1.05
15 1.05 1.07 1.09 1.10 Wal
+16 =i, —1.14 | —1.15 —1.17 —1.19
17‘ 1.18 1.20 1.22 1.24 1.26
18 1.25 1.27 1.29 1.31 1.33
19 1.31 1.33 135 137i 1.39
20 1.37 1.40 1.42 hese 1.46
+21 —1.44 —1.46 —1.48 —1.51 —1.53
22 1.50 1.53 1.55 1.57 1.60
23 1.57 1.59 1.62 1.64 1.67
24 1.63 1.66 1.68 1.71 1.73
25 1.69 iz 1.75. 1.78 1.80
¢ 127

340

Par. Lines.
+0.93
0.86
0.79
0.73
0.66
0.59

+0.52
0.45
0.38
0.31
0.24

+0.17

0.10
+0.03
—0.03
—0.10

(eli
0.24
0.31
0.38
0.45

—0.52
0.59
0.66
0.72
0.79

—0.86
0.93
1.00
1.07
1.14

—1.21
1.28
1.35
1.41
1.48

—1.55
1.62
1.69
1.76
1.83

345

Par. Lines.
+0.95
0.88
0.81
0.74
0.67
0.60

+0.53
0.46
0.39
0.32
0.25

+0.18

0.11
+0.04
—0.03
—0.10

—0.17
0.24
0.31
0.38
0.45

—0.53
0.60
9-67
0.74
0.81

—0.88
0.95
1.02
1.09
1.16

—1.23
1.30
1.37
1.44
1.51

—1.58
1.65
1.72
1.79
1.86

Attached
Thermom-
eter.

Degrees of
Reaumur.

c

—15
—14
icy
—12
-l1
—10)

I I
OU 09 bo mt Oem we AaHWwHO

eT Ont DD

—

+11
12
13
14
15

PerIG

a
1 : bf
ae ? fi re
\ md
st me
rs -
' =
m4
1 7
‘
= ‘
hh
a
5 Ze
:
\
.

a

300

TABLES

FOR CORRECTING THE

DEPRESSION OF THE BAROMETRICAL COLUMN

DUE TO CAPILLARY ACTION.

Q

129

CORRECTION FOR CAPILLARY ACTION.

Ir is known that the effects of capillary action are not the same in different liquids.
In a tube plunged in water, the liquid in the tube rises higher than the level of the
water in the vessel, and terminates by a concave surface, which is called a concave
meniscus. In a tube plunged in mercury the liquid in the tube stands lower than
the mercury in the vessel, and terminates by a convex surface, or a convex meniscus.
It is thus evident that the mercurial column in the tube of a Barometer does not rise
to its true height, and that it needs to be corrected for the depression due to capil-
larity, before it indicates the real pressure of the atmosphere.

La Place, in the Mécanique Céleste, Tom. 1V., has shown that the value of that cor-
rection depends upon the form of the meniscus, and gave a formula to compute it.
As this form varies in tubes of different bores, so does the depression, which dimin-
ishes as the diameter of the tube increases. ‘The form of the meniscus, however,
was supposed to be the same in tubes of the same diameter, and constant in the same
tube ; and on this supposition the tables generally used for correcting the capillary
action have been computed. But more accurate observations have proved that,
owing to various causes not yet all well understood, the form of the meniscus is often
different in tubes of the same diameter, and that it is even variable in the tube of the
same instrument.

It thus became necessary to construct new tables, taking into consideration, in a
given case, both the diameter of the tube and the form of the meniscus. Such tables,
with a double entry, have been given by Schleiermacher, in the Bibliotheque Univer-
selle de Genéve, Tom. VIII.; by Bravais, in the Annales de Physique et de Chimie,
Tom. V. p. 508; and by Delcros. ‘The numbers in these tables agree very closely ;
but as Deleros’s table is more extended than that of Schleiermacher, and in a more
convenient form than that of Bravais, it is given below, together with a reduction
of it to English measures, for the ordinary use.

The other tables may serve for comparison,

Table XXII., from the Report of the Committee of Physics and Metagralses of
the Royal Society of London, 1840, gives the correction to be applied to English
barometers for capillary action in boiled and unboiled tubes. It takes into account
the diameter of the tube, but not the variations of the height of the meniscus, or of
the convexity which terminates the barometrical column. This last element is sup-
posed to be in its normal state, and constant.

Tables XXIIL and XXIV., by Deleros, in the Annuaire Météorologique de France,
for 1849, give the means of finding the true correction to be applied to metrical
barometers for capillary action.

C 130

CORRECTION FOR CAPILLARY ACTION. 837

The first shows the normal height of the meniscus when in contact with the air
(as is the case in the inferior branch of a siphon barometer), and in the barometric
vacuum at the top of the column, in tubes of different bores. It enables the observer
to judge better of its variations.

Table XXIV. has been calculated by Delcros after the formulas of Schleiermacher,
making the constant 2 equal to 6".5278, being the mean value between that of Gay-
Lussac = 6""".5262, and that of Schleiermacher = 6"™.5295. It gives the amount
of the capillary action in millimetres of mercury, taking into account both the size
of the bore, or the internal radius of the tube, which will be found in the vertical
argument, and the height of the meniscus, given in the horizontal argument. The
internal radius of the tube is supposed to be known; the height of the meniscus, or
the vertical distance from the base, that is, from the sharp line where the mercury
ceases.to be in contact with the walls of the tube, to the very top of the convexity,
can be ascertained by measuring it several times by means of the vernier.

Example : — Suppose the internal radius of the tube to be 3"".2, and the height
of the meniscus to be 0.8; seek in the first vertical column the number 3""-.2;
follow then the horizontal line as far as the vertical column headed 0"™-.8, you find
there the number 0"".776, which is the amount of the depression due to capillary
action, or the value of the correction to be added to the observation.

Table XXV. is taken from Pouillet’s Eléments de Physique, Vol. II. p. 698 (1853).

Table XXVI. is found in Gehler’s Physicalisches Worterbuch, and in Schubarth,
Physicalische Tabellen, p. 21.

Table XXVII., which is Delcros’s table reduced into English measures, gives the
means of correcting with more accuracy the indications of the English barometers.
For its use, see, above, the explanation to Table XXIV.

Table XXVIII. is from Baily’s Astronomical Tables.

XXII. Taste FOR THE CORRECTION TO XXIII. Taste or tHe HEIGHT OF THE
BE ADDED TO ENGLISH BAROMETERS MENISCUS OF THE BAROMETRICAL
FOR CAPILLARY ACTION. CoLumn.
Correction for Normal Height of the Me-
Diameter §_ ————_——_______—_ Internal niscus in Millimetres.
ENS Unboiled Boiled ae
Tubes. Dupes, Millinnetres,
Inch. Inch. Inch. In the Air. pair
0.60 0.004 0.002 Sal
0.50 0.007 0.003
0.45 0.010 0.005 1 0.427 0.34
0.40 0.014 0.007 2 0.795 0.64
0.35 0.020 0.010 3 1.079 0.86
0.30 0.028 0.014 4 1.287 — 1.03
0.25 0.040 0.020 5 1.413 1.13
| 0.20 0.060 0.029 8 1.488 1.19
| 0.15 0.088 0.044 | 7 1193
P= =0st0 OWN: Bile 0070".

C 131

338 XXIV. DEPRESSION OF THE BAROMETRICAL COLUMN DUE TO CAPILLARY ACTION,

FILO | SCtO | G60°0 | $80'0 | G20°0 | $90'0 | SG0'0 | FFO'O | EE0'0 | GZO'0 | T10°0

OL €91°0 | 8STO | GSl'O | SFI'O | SEL'O | O€T'O | GET'0 OL
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99 00G'0 | €61°0 | 98T'0 | SZI°O | 69T'O | O9T'O | OSLO | GEI'O | 8GT'0 | ZIT'0 | SOLO | €60'0 | 080°0 | 290°0 | #60'0 | 1#0'0 | Lz0°0 | F10'0 99
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osG ” GGh'O | 9€F'0 | SIFO | S680 | LLZE°0 | FSE'0 | OFEO | GOED | 8L6'0 | 066 0 | 1660 | S610 | 1910} OSl 0 | 860':0 | S90'°G | EE0'0 og
8'P ” $0G'0 | 98F'0 | L9FO | SFFO | Gat'0 | L680 | OLE'0'| GFE'O | GIEO | 1840 | 6FE'0| GIG'0 | ISI'O | 9FI'0 | OTTO] #20'0 | ZE0'0 SFr
oP ” €9¢'0 | #FS'0 | GGS'0 | 66F'0 | EZF'0 | SFO | 9IF'0 | F8E'O | ISE'O0] OIEO | 0840 | ZtG'0 | F020 | F9L'0 | F210! €80°9 | ZEO'O 9°F
tr ” 069'0 | 609°0 | S8¢'°0 | 6S¢°0 | TEGO | 00G'0 | Z9F'0 | GEFO | S6E'O | 9GE'0 | SIE'O} EL4'0 | O€4'0 | S8T'O | OFI'O | #60'0 | LEO'O VP
GY ” ¢0L'0 | G89'0 | L£S9'0 | 829'°0 | L6G'0 | £99°0 | 9GG°0 | L8F'O | 9FF'O | GOFO | 9SE'0| 6080 | 094'0 | O12: 0 | 8S1'0 | 9019 | ESo'0 GF
OF ” 062°0 | 992°0 | 8€2°0 | Z02'0 | €29'0 | SE9'0 | FESO | ISSO | FOG'O | Sct'O | FOF'O | OSE'O | G62'0 | 8EZ'0 | O81'0| OZI'0 | 090'0 OF
8 » | 2880 | 198°0 | I§8'0 | 262'°0 | 0920 | 8TZ°0 | €29'0 | #290 | GLG'0 | LIGO | 6St'0 | 66E'0 | 9EE'0 | 1L20 | GOz0 | ZET:0 | 690°0 se OR
9's ” ” 0L6°0 | 8£6'0 | 106'0 | 098°0 | FI8'0 | #92°0 | OIL'0 | GS9'0 | O6C'0 | FEG'0 | SGF'0 | FSE'O | O10 | FEG'0 | LSI'O | 620'0 9'¢ nc)
VS ” ” c60°'L | 190° | IGO'T | 9260 | 9660 | TZ8°0 | O18'O | SFL‘O | $Z9'0 | 109'0 | €6S'°0 | 1FF'0 | 9GE'0 | 6940 | I8T'O | 160'0 rE
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GG ” ” ” ” ” ” ” £806 | 8281 | IS8'T | SOL T | IFS 1 | O9EL | I9T'T | 860 | 220 | L8F'0 | SEZO GG
0G ” ” ” ” ” ” ” ” 8TEs | 606% | 9F0% | GCS | SFI | EIFT | SSI'l | 880} 8690 | cOE'0 OG
” ” ” ” ” ” ” ” ” 6699'S | 8S | OLEG | F60'S | 9FL 1 | LEFT] SOUT) LFZ0) SLE0 81
” ” ” ” ” ” ” ” ” ” OSO'S | GI8'G | 86G'G | 9611'S | OGB'I | FOF L | SS6'0 | F8F'O oT
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UOTTTUTAT | “CUNTTETAL | SOUUTTUTAT | UOT TUTAL | “OOUUTTUAT | “COUELTUTAT | “UOTE | “COUT | “CTA | CCUTTTAL | COTTA | CCOTTUTA | OUT UAT | CCTUTAT | MUTUAL | CTE. | CULT OIAT | “ULL TAT.
anu | SE | ek | ok] ok | On| Sk | ok | WE | OL | GO| 80 | 4°0| 9°0 | £0 | TO Or ee
aqny, ey) = ——! — — aqny, eya|l
JOUSDIDET “SaLIBUUIT[IJAL UL SNOSIUATA, BY. JO WS19Fy Jo ee

“SHULAWITIIPY NI SNOSINGJY AO LHOIAFY = LNAWAAUY TVLNOZIYO}]Y “FANT, AO SAIGVY IVNUFLIN] — LNANNOYY IVOILYA A

339

_XXV. DEPRESSION OF THE BAROMETRICAL COLUMN DUE TO CAPILLARY ACTION.

From POuvILLET.

Internal Internal Internal
Diameter | Depression. | Differences.|| Diameter | Depression. |Differences.|| Diameter | Depression. | Differences
of Tube. of Tube. of Tube

=

Millimetres.| Millimetres. | Millimet. || Millimetres.|Millimetres.| Millimet. || Millimetres. Millimetres.| Millimet.

2.00 4.579 ; 8.50 | 0.604 : 15.00 | 0.127
2.50 3.595 oe 9.00-1| Obese eis Wy agcbo 4 (co.ara0-| | eee
3.00 2.902 O82 9.50 || Oleh ee 16.00 |'0.099 | |: °2°88
3.50 2.415 pie 10:00 || 0:41S lee 16.50 | 0.087 | °°)?
4.00 2.053 vane 10.50 | 0.372 | OO" 17.00 | 0.077 | °°
0.301 0.042 0.009
4.50 1.752 11.00 | 0.330 17.50 | 0.068
5.00 1.507 erie 11.50 | 0.293 | 037 18.00 | 0.060 | °°
5.50 1.306 Hess 12.00 | 0.260 ee 18.50 | 0.053 ee
6.00 1.136 i 12.50 0.230 ; 19.00 0.047 3
6.50 0.995 pu 1800.1 WL 20e | eer rsh 29.50 | sio.gsae | oR!
0.118 0.023 0.005
7.00 0.877 13.50 | 0.181 20.00 | 0.036
7.50 0.775 rate 140001 O.TET| oie 20.50 | 0.032 | °°
8.00 0.684 pe 14,50. | ovvaae ) ral e100. Ecosozs-c| (ores
0.080 0.016

XXVI DEPRESSION OF THE BAROMETRICAL COLUMN DUE TO CAPILLARY ACTION.

Depression according to

Taternal Depression according to Theil

Diameters sara = Ss ae ea ee ear | |) Diameter
of Tube. | Ta Place. Young. Ivory. | Cavendish. of Tube. | La Place. | Young Ivory. |Cavendish.

Millimetres.} Millim. "‘Millim. Millim. Millim. ||Millimetres.| Millim. Millim. | Millim. Millim.
2.00 4.454 4.887 4.888 4.472 11.50 0.315

2.50 3-568 12.00 0.281 0.242 | 0.253 0.200
3-00 2.918 2.986 2.988 3.054 12.50 0.250
3-50 2.442 13.00 0.223 | 0.188 | 0.196 | 0.170

4.00 2.068 2.063 | 2.066 | 2.187 13.50 0.198

4.50 1.774 14.00 0.176 | 0.144 | 0.155 | 0.150
5.00 1.534 1.510 1.513 1.735 14.50 0.156

5.50 1.337 15.00 0.137 | O.111 | 0.118 0.131
6.50 1.030 16.00 0.107 | 0.088 | 0.087

7.50 0.803 17.00 0.083 | 0.068 | 0.071
8.00 0.712 | 0.669 | 0.673 | 0.820 17.50 0.073
8.50 0.632 18.00 0.064 | 0.053 | 0.054

6.00 1.171 1.139 1.134 1.377 15.50 0.121
9.00 0.562 0.517 | 0.521 0.608 18.50 0.056

7.00 0.909 0.869 | 0.868 1.073 16.50 0.094
|
|

9.50 0.500 19.00 0.019 | 0.041 | 0.012
10.00 0.445 | 0.402 | 0.406 | 0.406 19.50 0.043
10.50 0.397 20.00 0.038 | 0.031 | 0.031 |
11.00 0.354 | 0.311 0.316 | 0.270 20.50 0.034

11.50 0.315 21.00 0.030 | 0.024 | 0.024

Cc 133

340

XXVII. DEPRESSION OF THE BAROMETRICAL COLUMN DUE TO CAPILLARY ACTION,
REDUCED INTO ENGLISH INCHES FROM DELCROS’S TABLE.
ee Height of Meniscus in Thousandths of an English Inch.
iam-
eter
of
Tube. 5S | 10) 15 | 20) 25 | 30 | 35 | 40 | 45150) 55 | 60 | 65 | 70
b amie Inch. | Tneh. laens lich. tneh: | Taenel Inch. | Inch. | Inch. aan ! Inch: | Inch. Ga Inch.
| 0.10 ||0.040 0.076 0.109 0.136 0.155
| 0.12 || .027) .053/ .076| .097] .114
0.14 | .019) .038| .056| .071] .085 0.097
0.16 || .015) .029| .042| .055] .066| .076 0.084
0.18 -011) .022| .033)| .043] .052| .060| .067 |0.073
0.20 009 .018| .026) .034} .042| .049) .055) .060 0.064
0.22 .007| .014) .021| .028] .034| .040) .045) .049) .053|0.057
|
0.24 || .006| .012) .017| .023] .028| .033| .037| .041)| .045 -048 0.050
0.26 || .005| .010| .014} .019] .023] .027) .031] .035| .038] .040) .013 0.045
0.28 | -004| .008;| .012} .016) .019| .023} .026| .029| .032] .034| .036) .038
0.30 || .003} .007| .010| .013] .016| .019| .022) .025| .027] .029) .031| .033 |0.034
0.32 | 003, .006, .009 -O11] .014) .016| .019) .021] .023] .025| .027) .028| .030
0.34 -002 | .005| .007| .010] .012| .014| .016| .018| .020] .022| .023) .024| .026
0.36 | .002 .004 .006| .008] .010) .012) .014| .016| .017] .019| .020) 021, .022
0.38 -002| .004| .005} .007] .009| .010) .012) .013] .015] .016| .017/ .018} .019
0.40 002) .003 | -005 006] .008| .009| .010; .012| .013] .014) .015| .016) .017
0.42 .001| .003| .004! .005] .007| .008| .009) .010) .011] .012| .013| .014 015 0.015
0.44 -001) .002) a -005} .006) .007; .008 .009;| .010] .011| .011) .012) .013) .013
0.46 .001) .002) .003) .004] .005| .006| .007) .008) .008} .009| .010) .011| .011) .012
0.48 | -001| .002| .003| .004] .004; .005| .006;) .007| .007) .008) .009| .009| .010) .010
0.50 -001) .002) .002) .003] .004| .004| .005| .006) .006] .007; .008| .008) .008)| .009
| 0.52 -001| .001; .002) .003] .003; .004) .005| .005| .006] .006| .007| .007| .007| .008
0.54 .001, .001} .002| .002] .003) .003 .004) .004) .005] .005) .006| .006| .006) .007
& | 10) 45 | 20),25 | 30 35 | 40 | 45 | 50 | 55 | GO| 65 | 70
XXVIIX. DEPRESSION OF THE BAROMETRICAL COLUMN DUE TO CAPILLARY
ACTION, EXPRESSED IN ENGLISH INCHES. — Balty.
Depression according to Depression according to
Diameter Diameter
of Tube. of Tube.
Ivory. Young. La Place. Ivory. Young. La Place.
| Eng. Inch. | Eng. Inch. | Eng. Inch. | Eng. Inch. Eng. ene Eng. Inch. | Eng. Inch. | Eng. Inch.
0.05 0.2949 0.2964 (Oeeiene 0.35 0.0212 0.0196 0.0216
0.10 1404 1424 -1394 0.40 O154 -0139 -0159
| 0.15 0865 -0880 0854 0.45 0112 0100 -0117
0.20 0583 .0589 -0580 0.50 -0082 -0074 -0087
0.25 -0409 -O404 -0412 0.60 0043 -0045 -0046
0.30 -0293 -0280 -0296 0.70 -0023 Shanske 0024
0.35 0.0212 0.0196 0.0216 0.80 0.0012 ear 0.0013
C 134

eat ct

341

METEOROLOGICAL TABLES

SERIES IV.

HYPSOMETRICAL TABLES.

vo ae eee reer r

, H
bk. a3
wT oae 4 Ries * .
Fe rye $ , * ;
A y ¢ é x i i e ‘
t ’ :
¥
CM | ’ i
bs ’
)
s = ¥
0 4 s 4 : ae.
q Gy 3 os * i A
,
‘ cs
2
‘eS re f ‘ae y ] r
\
0
° 2 o ° > 2
rs
LS
‘

343

CO N ean Ts.

(The figures refer to the folio at the bottom of the page.)

1. BarometricaAL MEASUREMENT OF HEIGHTS.

On the Tables and Formule

Tarte I.
“ II.
“ Ill.
6 IV.
74 Vis
66 Le
Sco > SeVDNs
te VIE
66 IX.
“c Xe
oe XI.
ce LE
coy OX,
Cer TV.
ee Vi
ree WV
tt ge ON
eo V LE

D

Tables based on Laplace’s Constants

Delcros’ Tables, in Metrical Measures

Guyot’s Tables, in English Measures

Loomis’ Tables, in English Measures

Gauss’ Tables, modified by Dippe, Old French tee

Dippe’s Tables, for reducing Barometrical Observations to another
Level, and for computing Heights, Old French Measures

Babinet’s Modification of Laplace’s Formula

Baily’s Tables, in English Measures . :

Tables based on Bessel’s Formula.

Plantamour’s Tables, in Metrical Measures

Miscellaneous Tables.

Correction for the Hour of the Day at which the Observations have
been taken, Coefficients by Berghaus

Correction for the Hour of the Day, Old French Meseutes

Correction to be applied to the Half-Sums of the Temperatures
observed at Geneva and St. Bernard, and its Value in Metres at
all Hours and Seasons of the Year, by Plantamour :

Computing Altitudes by the Height of the Barometer at the ao
Level ; 3 : : é

Mean Height of the Barometer at ie Pavel of the Sea in various
Latitudes :

Mean Height of the a ee in all MONE of the ss

Mean Height of the Barometer at all Hours of the Day

Tropic Hours of Daily Variation at Halle

Amplitude of Daily Variations in Various Latitudes

Reducing the Barometer to the Level of the Sea

Height, in English Feet, of a Column of Air corresponding to a
Tenth of an Inch in the Barometer :

Height, in French Feet, of a Column of Air foivespanding toa
Paris Line in the Barometer .

3

78
79

80

81

33
84
84
85
85
86

87

87

B44

Tasie XVIII.

Ee XIX.
ce XIX’,
6c XX
* XXI.
us XXII.
ce XXIII.
e XXIV.
Be XXV.
co, 6XXVI.
D

CONTENTS.

Height, in Metres, of a Column of Air corresponding to a
Millimetre in the Barometer : :
Height, in Metres, of a Column of Air corresponding to a Mil-
limetre in the Barometer at different Temperatures and Ele-
vations. . 5 : 7 é : : : :

Height, in English Feet, of a Column of Air, corresponding to
a Tenth of an Inch in the Barometer, at different Tempera-
tures and Elevations . ; ; : .

Correction to be apptied to the Means of the Hours of Observation
to obtain the True Mean Barometical Pressure, Philadelphia

Correction to be applied to the Means of the Hours of Observa-
tion to obtain the true Mean Barometrical Pressure, Greenwich

For reducing Minutes into Decimals of an Hour .

Correction for Curvature and Refraction d :

2. THermometricaL MEASUREMENT OF HEIGHTS.

Regnault’s Barometric Pressures corresponding to the Tempera-
ture of Boiling Water. : : :

Regnault’s Barometric Pressures corresponding to the Tempera-
ture of Boiling Water, revised by Moritz, in Metrical Measures

Regnault’s Barometric Pressures corresponding to the Tempera-
ture of Boiling Water, revised by Moritz, in English Measures

Page

87

89

90

91

93
94

98

162

104

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345

BAROMETRICAL

MEASUREMENT OF HEIGHTS,

OR

TABLES

FOR COMPUTING DIFFERENCES OF ELEVATION FROM BAROMETRICAL
OBSERVATIONS.

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347

HYPSOMETRICAL TABLES

FOR

COMPUTING DIFFERENCES OF ELEVATION FROM BAROMETRICAL
OBSERVATIONS.

Numerous determinations of altitude are one of the great desiderata of physical
science, and no more ready means for obtaining them is at the disposal of the scien-
tific man than the Barometer. A traveller, furnished with the improved and con-
venient instruments we can now command, and with some experience in using them,
can take a large number of barometric observations for determining heights, at the
cost of little trouble or time. It is, however, quite otherwise with the computations
by which the results are obtained. The prospect of that tedious and time-robbing
labor not only too often cools the zeal of the observer, but a vast amount of data
actually collected remain of no avail from the want of having been computed.

The object of this much enlarged set of Hypsometrical Tables is to facilitate the
task of the computer. It contains practical tables adapted to the three usual baro-
metrical scales, and, among them, No. I., II., and V. are so disposed as to dispense
with the use of logarithms, and to reduce the computation to the simplest arithmeti-
cal operations. The others suppose the use of logarithms, a method which may still
be preferred by some observers.

As these various tables represent the development of the principal formule which
have been proposed, the computer is enabled to compare the results obtained by
each of them, and to select that which he most approves.

These formule may be referred to two classes, the respective types of which are
Laplace’s and Bessel’s formule.

Laplace, in the Mécanique Céleste, Tom. IV. p. 292, gave a complete solution of
the problem, and proposed a formula which soon superseded the older and less accu-
rate formule of De Luc, Shuckburgh, and others. The coefficients which enter in it
were derived from the best determinations of the needed physical constants which
science could then furnish, the most important of which are the relative weight of
the air and of the mercury, and the rate of expansion of air by heat. The first was
assumed to be y5347, according to the experiments of Biot and Arago; and the ba-
rometrical coefficient deduced from it, 18317 metres. ‘This coefficient was, how-
ever, empirically increased to 18336 metres, in order to adjust the results of the
formula to those furnished by the careful trigonometrical measurements made by
Ramond for the purpose of testing its correctness. It becomes 18393 metres when
including the correction due to the effect of the decrease of gravity with the height
onthe density of the mercurial column and of the air. The coefficient expressing
the expansion of the air by heat, as determined by Gay-Lussac, viz. 0.00375 of its
bulk for one Centigrade degree, was adopted, but Laplace increased it to 0.004, in
order to take into the account the effect of the greater expansive power of the vapors
contained in the atmosphere.

D 7

348 HYPSOMETRICAL TABLES.

These values have been retained in the different formule proposed later by Gauss,
in Schumacher’s Jahrbuch for 1840, by Schmidt, Mathem. und Physische Geographie,
II. p. 205, and by Baily, Astronomical Tables, p. 183, which, therefore, only change
the form without changing the results. D’Aubuisson, in his formula and tables, Traité
de Géognosie, p. 488, only reduced the barometrical coefficient to its theoretical
value, which he determined to be 18365 metres, leaving unchanged the other coefh-
cients of Laplace’s formula.

Bessel first introduced, in his formula, Astronomische Nachrichten, No. 356, a sep-
arate correction for the effect of moisture. ‘The correction for the temperature of
the air is computed in his tables for two values of the coefficient, that of Gay-Lussac,
0.00375, and that of Rudberg, 0.00365. Laplace’s barometrical coefficient is re-
tained, but the correction for the decrease of gravity is considerably modified.

In Elie Ritter’s formula, in the Mémoires de la Societé de Physique de Genéve,
Tom. XIII. p. 348, the corrections for temperature and moisture are also separated ;
but other values of the barometrical and thermometrical coefficients, derived from
Regnault’s determinations, are used, and a new method is proposed for applying the
correction due to the expansion of air, which is made proportional to the square of
the difference between the observed temperatures at each station.

Baeyer’s formula, recently published in Poggendorf’s Annalen der Physik und
Chemie, Tom. XCVIII. p. 371, does not belong to either of the two classes just men-
tioned ; for while it keeps Laplace’s barometrical and thermometrical coefficients, it
corrects the effect of temperature by a method analogous to that of Ritter, and it en-
tirely neglects the effect of aqueous vapor.

In the following set the tables of Delcros, Guyot, and Loomis develop the formula
of Laplace. The much larger tables of Delcros render unnecessary those of Olt-
manns, which are yearly reprinted in the Annuaire du Bureau des Longitudes. In-
stead of Gauss’s tables will be found the tables of Dippe, which are computed from
the same formula, but are more extended. Baily’s tables close the first series. The
tables of Plantamour, computed from Bessel’s formula, are given here in preference to
Bessel’s tables, because Plantamour substituted for Laplace’s barometrical coefficient
that derived from the probably more accurate determination of the relative weight
of the air and mercury by Regnault, viz. 18404.8 metres. E. Ritter’s tables, com-
puted from his own formula, give perhaps, in extreme cases, better results; but
as, in ordinary circumstances, the altitudes obtained do not much differ from those
furnished by the less complicated tables of Plantamour, they were not reprinted
here.

- The miscellaneous tables which follow furnish useful materials for solving several
questions connected with the barometrical measurements.

Regnault’s table of Barometric Pressures corresponding to Temperatures of the
Boiling Point of Water, revised by Moritz, and its reduction to English measures, will
be found a valuable addition for thermometrical measurements of heights.

349

i

TABLES
FOR

DETERMINING DIFFERENCES OF LEVEL BY MEANS OF
BAROMETRICAL OBSERVATIONS,

COMPUTED FROM THE COMPLETE FORMULA OF LAPLACE,

By M. T. Detcros.

Construction of the Tables.

If we take z = difference of level of the two barometers,
a = earth’s mean radius = 6366200 metres,
L = mean latitude between the two stations,
and further : —

h = observed height of the barometer,
Lower T = temperature of the barometer,

j # — temperature of the air
At Station. Y ’

T’ = temperature of the barometer,

h! = observed height of the barometer,
Upper
t/ = temperature of the a

and if we make finally H = h + VW’. (Cs — ;

we shall have, according to Laplace, the following general and complete equation : —
(1 + * io)
z — 18336 metres x 4 (1 + 0.0028371 cos. 2. L)
| (2+ 2). Log: (ar) + & 0-868589)
after the proper transformations this ae becomes : —

(+8 ie)
(or) yt cos. 2. L) :

h
a ween (x) ese te x 1( (+ (log. (fr) -+ 0.868589) . 7 =)

ee (=r)

D

350 BAROMETRICAL MEASUREMENT OF HEIGHTS.

introducing into this expression the value in metres of a, the earth’s mean radius,
making z = Log. (+7) 18336 and Log. (iz) — (iam) which can be done without
sensible error, the above formula takes the following form, sufficiently accurate for
practical purposes : —

(+ Sar)
z = Log. (47). 18336 metres x 4 (1 + 0.0028371 cos. 2. L)

z + 15926
( + “asex00

the four factors of which can easily be developed in tables, as has been done by Mr.
Oltmanns. But though this savant chose to develop also the second factor, I found
it better not to do so, partly because the calculation of it is very easy, and also or
account of the great extent it would have been necessary to give to this table, in

order to avoid troublesome interpolations.
T—T!
6196
absolute expansion of the mercurial column; I took that of the relative expansion

In the calculation of h’. G : Mr. Oltmanns used the constant coefficient of the

of the mercury and of the brass scale. It is obvious, therefore, that if the scale
of the barometer employed was of wood, glass, iron, or of another substance, it
would be necessary to make use of as many different coefficients, and the Table II.
could not be used. Moreover, Oltmanns combined the last two factors of the gen-
eral formula in one single table with double entry. This table I have calculated,
extending it sufficiently to avoid a double interpolation ; but as it seemed to me
much too extensive, I substituted for it Tables II. and IV., which are more condensed,
without rendering any troublesome interpolation necessary.

I carried the calculation of these tables beyond the limits at which Oltmanns chose
to stop, in order that they may answer for the most extreme cases.

At the head of each table will be found the factor of which it is the development ;
this makes any other explanation superfluous.

All these tables give, at sight, the numbers wanted; only when very great pre-
cision is desired, a slight interpolation, at sight, and very easy to apply, may be re-
quired. My principal object was to relieve the computer of the troublesome and
annoying labor of interpolations.

| added to these four tables the small Table V., taken from the Annuaire du
Bureau des Longitudes of Paris. It will be seldom used.

When calculating differences of level, in the same order, with the tables, and by
the complete formula of Laplace, the results thus obtained never differ by more than
one decimetre in the most extreme cases. The following example will illustrate this
statement. I take the observation made in a balloon, by Gay-Lussac, at Paris, as
an extreme case, which is very well adapted to manifest the errors of the tables,
if there were any, by comparing the results obtained by means of them with those of
the direct calculation according to the complete formula of Laplace, from which

they are derived.
D 10

BAROMETRICAL MEASUREMENT OF HEIGHTS. 851

Example of Calculation by the complete Formula of Laplace and by the Tables
Height of the Balloon of Gay-Lussac.

The observation gave : —

Gah) = S08 S0nce Gi =. 9.56 cave. OS
Paris kh = 765.68 T =-+ 30.8 t=
T—T=4403 (¢+0)= +4218 et2 (t+1) = 42°.6

Ww ith these data the formula of Laplace gives the following calculation : —

Log. h’. = 328.80 = 2.5169318
Log. (T — T’) = + 40.3 = 1.6053050
Log. dilat. coefficient = 0.0001614 = 6.2079035
Milli. (SSS
Corr.a =+ 2.14 log. = 0.3301403
‘= 328.80
H = 330.94 log. = 2.5197480
log. h = 765.68 = 2.8840473
(Log. h — Log. H) = Difference of Log. = 0.3642993
Log. of (Log. h — log. H) = 9.56 14583
Log. general coefficient = 18336 = 4.2633046
Log. ( (77) 18336 ) = (Aa) = 3.8247629
Corresponding number = 6679.79 = (A + a
hog. cos. 2-197" 40° >= —— 9.1251872
Log. constant = 0.0028371 = + 7.4528746
Log. (A + a) = 6679.79. =+ 3.8247629
Log. ( (0.0028371. Cos. 2.L) x (A+ a) ) = — 0.4028247
Milli.
Corresponding number = — 2.53
6679.79
(A+a+8) = 6677.26
Metres.
Corr. temp. air =v = 284.45 = (6.677 X 42.6)
(A +a+ 8+ v) — 6961.71
Constant =. + 15926
2288 S.. Log. A 0022
Comp". log. a = 6366200 been LOG. | ot oollo7
(A+a+pB+v)= G9GI 1 2. 2 dzog.|:.. 1 13:8427 153
peel 25.08 Log. = + 1.3984372
(A+a+8+vr+5) = 6986.74
Altitude barom. Paris = 48.70
‘ Altitude of balloon = 7035.44 by the formula of Laplace.
tt

352 BAROMETRICAL MEASUREMENT OF HEIGHTS.

Now iet us calculate by the tables, placing side by side the corresponding results
given by the formula of Laplace.

Millim. 6 5
Balloon h’ = 328.80 T’=— 9.5 t—— 9.5
Paris h = 765.68 T =+ 308 t = + 30.8
Metres.
; h’ = 328.80 G 1478.4 By the formula of
ae h = 765.68 Hable Tyenres 8209.8 Laplace we found :
A = 6731.4
with (T’ — T) = — 40°.3, Table II. gives a = —52.0
Metres.
(A + a) = 6679.4 6679.79
with L = 48° 50’, Table III. gives a =— 23 — 2.53
(A + a+ 8) = 6677.1 6677.26
with 2 (¢ + ¢’) direct calculation gives vy = -— 284.5 + 284.45
(A+a+ 8+ 2) = 6961.6 6961.71
with 6960, Table IV. gives 6 =+ 2.1 + 25.08
(A+a+8-+v-+ 4) = 6986.7 6986.74
Altitude of barometer at Paris =-+ 48.7 + 48.70
Therefore altitude of balloon = 7035.4 7035.44

Two results which are sensibly identical. This ought not to astonish us; the tables
being the exact development of the formula, they ought to give the same results,
provided in both cases nothing has been neglected, and the four factors have been
calculated in the same relative order.

De.cros.

Disposition and Use of the Tables.

The disposition of the tables is the following : —

In Table I[., the first column on the left contains the height of the barometer in
millimetres, corrected for the error of the instrument.

The second column headed N (number), gives in metres the first two figures of
the number corresponding to each height of the barometer in the first column ; the
third column, headed 0.0, gives the remaining figures for the full number of milli-
metres ; the following columns give the remaining figures for the same number of
millimetres and each decimal fraction of a millimetre which may follow it. The
value of the hundredths is to be found in the last column.

Example : — Height of Barometer = 761.00.

We look out in the first column for the number 761, and we find on the same line
in the second column, 81; in the third column, headed 0.0, or full number, 61.1.

The corresponding number is thus 8161.1 metres.
D 12

BAROMETRICAL MEASUREMENT OF HEIGHTS. 853

Height of barometer =: 761.35.

The second column gives 81; the column headed 0.3 gives, on the same line, 64.2.
The corresponding number is then 8164.2. Adding the value of five hundredths of
miilim., being 0.5, as indicated in the last column, we have 8164.7 metres, cor-
responding to 761.35 millim.

The other four tables need no further explanation.

To calculate, by means of the tables, a difference of level from two barometrical
observations, proceed in the following manner : —

1. Take the height of the barometer at the lower station, or h, and seek in
Table I. the number corresponding to this height. Seek likewise the number cor-
responding to the height of the barometer at the upper station. Subtract the second
from the first. ‘The remainder is the approximate difference of level between the two
stations. Then apply the following corrections.

2. Correction to be applied for the temperature of the barometers.

If T’ be the temperature of the attached thermometer at the upper station, and T
that of the attached thermometer at the lower station, take the difference, or T’ — T,
and seek in Table II. the number corresponding to this difference.

When T” is smaller than T, that is, when the temperature of the attached ther-
mometer of the upper station is lower than that of the lower station, the correction
is to be subtracted from the approximate height; when T’ is greater than T, it is to
be added.

3. Correction for the temperature of the air.

The first correction having been applied, multiply the number obtained, or N, by
the double sum of the temperatures of the air at both stations, and divide the prod-
uct by 1000; the number thus found, or the quantity expressed by — 2(¢ + 0’)
is the correction in metres which is to be added to the preceding number N.

4. Tables III. and IV. give two corrections; the first due to the decrease of
gravitation in latitude, which is to be added when the mean latitude of the places
of observation is between the 45th parallel and the equator; and to be subtracted
when it is between the same parallel and the poles, as indicated at the head of the
columns. The second correction, due to the decrease of gravitation on the vertical
line, is always additive.

5. Table V. gives another small correction to be added in the case of the lower

station being very elevated above the level of the ocean.

EXAMPLES OF CALCULATION.

Measurement of the Height of Guanaxuato. By M. de Humboldt.

Barometer at the upper station, hi = 600.95 T’=21.3 ¢ = 213
Barometer at the level of the sea, hi 16> EF = 25.5 t= 2s

D le

854 BAROMETRICAL MEASUREMENT OF HEIGHTS.

‘ ; h = 8183.5

Table I. gives the corresponding numbers, | h! —= 6280.8

Difference, 1902.7

Table IL. gives for T’ — T, — 52
Difference, 1897.5 = N

5 2(¢ +e) = 1.897 x 93.2, + 176.8

Sum, 2074.3

Table III. gives for mean latitude of 21°, + 4.38

Table IV. gives for decrease of gravitation in the vertical line, + 6.0

Hence altitude of Guanaxuato above the ocean, 2084.6

Measurement of the height of Mont Blanc, August 29, 1844. By MM. Bravais

and Martins.

mm.
Barometer at one metre below the summit, h’ = 424.05 T’ = — 4.2 — 1.6
Barometer of the Observatory of Geneva, h = 729.65 T= 186t= 19.9
$ : h = 7826.0
Table I. gives for numbers corresponding to hi —= 3504.4
Difference, 4321.6
Table II. gives for T’ — T, — 29.3
Difference, 4292.3 =: N
nr 2 (tt!) = 4292 x 23.4 = + 100.4
Sum, 4392.7
Table III. gives for the mean latitude of 46°, — 04
. Difference, 4392.3
Table IV. for decrease of gravitation in the vertical line + 13.7
Table V. for the elevation of the lower station, + 0.5
Sum, 4406.5
Elevation of the lower barometer above the ocean, 407.0
Hence elevation of upper barometer above the ocean, 4813.5
Finally, height of the summit of Mont Blanc above the ocean, 4811.5

D 14

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS, 355

TABLE I. — Giving A = 18336 x log. H or h...., argument H or 2 in Millimetres.

Barom- Pans
Hiv',|| N. | 0.0 | O.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 0.9 [fe
Milli. || Metr.| Metres | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. Metr.
288 AM 25-45 26:2) 2 28°9">) 31-7 |) 34-4 4 37.2) |. 40:0 42.7 | 45.5 | 48.2 | 1,0.3
289 4] 51.0 | 53.8 | 56.5 | 59.3 | 62.0 | 64.8 | 67.5 70.3 | 73.0 | 75.8 | 2/0.5
290 4 | 78.5 | 81.3 | 84.0 | 86.7 | 89.5 | 92.2 | 95.0 | 97.7 3 | 0.8
| 290 || 5 00.4 | 03.2 | 4]1.1
291 5 | 05.9 | 08.7 | 11.4 14.1 16.8 | 19.6 | 22.3 | 25.0 | 27.8 | 830.5 | 5/|1.4
292 5 | 33.2 | 36.0 | 38.7 | 41.4 | 44.1 | 46.8 | 49.6 Sore a DO-0) ie Oded. || Oil eG
293 5 | 60.5 | 63.2 | 65.9 | 68.6 | 71.3 | 74.0 | 76.7 | 79.5 | 82.2 | 84.9 | 7|1.9
294 5 | 87.6 | 90.8 | 93.0 | 95.7 | 98.4 8 | 2.2
294 6 01.1 | 03.8 | 06.5 | 09.2 | 11.9 | 9|2.4
295 6 | 14.6 | 17.3 | 20.0 | 22.7 | 25.4 | 28.1 | 30.8 | 33.5 | 36.2 | 38.9
296 6 | 41.6 | 44.3 | 47.0 | 49.6 | 52.3 | 55.0 | 57.7 | 60.4 | 63-1 | 65.8
297 6 | 68.4 | 71.1 | 73.8 | 76.5 | 79.1 | 81.8 | 84.5 | 87.2 | 89.9 | 92.5
298 6 | 95.2 | 97.9
298 7 00.5 | 03.2 | 05.9 | 08.6 | 11.2 13.9 | 16.6 | 19.2
299 7 | 21.9 | 24.5 | 27.2 | 29.9 | 32.5 | 35.2 | 37.8 | 40.5 | 43.2 | 45.8
300 7 |} 48.5 | 51.1 53.8 | 56.4 | 59.1 | 61.7 | 64.4 | 67.0 | 69.7 | 72.3
301 7 | 75.0 | 77.6 | 80.3 | 82.9 | 85.5 | 88.2 | 90.8 | 93.5 | 96.1 | 98.7
302 8 | 01.4 | 04.0 | 06.6 | 09.3 | 11.9 | 14.5 | 17.2 19.8 | 22.4 | 25.1
303 8 | 27.7 | 30.3 | 33.0 | 35.6 | 38.2 | 40.8 | 43.5 | 46.1 | 48.6 | 51.3
304 8 | 54.0 | 56.6 | 59.2 | 61.8 | 64.4 | 67.0 | 69.6 | 72.3 | 74.9 | 77.5
305 8 | 80.1 82.7 | 85.3 | 87.9 | 90.5 | 93.1 | 95.7 | 98.3
305 9 01.0 | 03.6
306 9 | 06.2 | 08.8 11.4 14.0 | 16.6 | 19.2 | 21.8 | 24.4 | 27.0 | 29.6 |110.3
307 9 | 32.1 34.7 | 37.3 | 39.9 | 42.5 | 45.1 | 47.7 | 50.3 | 52.9 | 55.5 | 910.5
308 9 | 58.0 | 60.6 | 63.2 | 65.8 | 68.4 | 70.9 | 73.5 | 76.1 | 78.7 | 81.3 |3]/0.8
309 9 | 83.9 | 86.4 | 89.0 | 91.6 | 94.1 }| 96.7 | 99.3 4/1.0
309 || 10 01.9 | 04.4 | 07.0 |5/ 1.3
310 10 | 09.6 12.1 14.7 | 17.3 | 19.8 | 22.4 | 25.0 | 27.5.) 30.1 } 32.7 | 6) 1.5
311 10 | 35.2 | 37.8 | 40.3 | 42.9 | 45.5 | 48.0 | 50.6 | 53.1 55.7 | 58.2 | 711.8
312 10 | 60.8 | 63.3 | 65.9 | 68.4 | 71.0 | 73.5 | 76.1 78.6 | 81.2 | 83.7 |8]9.1
313 10 | 86.3 | 88.8 | 91.4 | 93.9 | 96.4 | 99.0 9 | 2.3
313 11 01.5 | 04.1 | 06.6 | 09.1
314 Pig Ls L425 16.7 2\) 1953.) 218A 24.3), 26.9: |, 29545) 31.9, | 84.5
315 11 | 37.0 | 39.5 | 42.0 | 44.6 | 47.1 }| 49.6 | 52.1 54.7 | 57.2 | 59.7
316 11 | 62.2 | 64.8 | 67.3 | 69.8 | 72.3 | 74.8 | 77.3 | 79.9 | 82.4 | 84.9
317 11 | 87.4 | 89.9 | 92.4 | 94.9 | 97.4 | 99.9
317 12 02.4 | 05.0 | 07.5 | 10.0
318 T2HIL2°5 15.0 | 17.5 | 20.0 | 22.5 ] 25.0 | 27.5 | 30.0 | 32.5 | 35.0
319 12 | 37.5 | 40.0 | 42.5 | 45.0 | 47.5 | 50.0 | 52.4 | 54.9 | 57.4 | 59.9
320 12 | 62.4 | 64.9 | 67.4 | 69.9 | 72.3 | 74.8 | 77.3 | 79.8 | 82.3 | 84.8
32] 12 | 87.2 | 89.7 | 92.2 | 94.7 | 92.1 | 99.6 i
321 || 13 02.1 | 04.6 | 07.1 | 09.5 |
322 13) | 12:0 | 14.5 17.0 | 19.4.| 21.9 ] 24.4} 26.8 | 29.3 | 31.8 | 34.2
36.7 | 39.2 | 41.6 | 44.1 46.6 | 49.0 | 51.5 | 53.9 | 56.4 | 58.9

324 || 13 | 61.3 | 63.8 | 66.2 | 68.7 | 71.1 | 73.6 | 76.1 | 78.5 | 81.0 | 83.4
i $25 || 13 | 85.9 | 88.3 | 90.8 | 93.2 | 95.7 | 98.1

wo
bo
a vo
_
wo

Parts |

Bam! N. | 0.0 | 0.1 | 0.2 | 0.3 |-0.4] 0.5 | 0.6 | 0.7 | 0.8 | 0.9 |r",

Horh. | 0.01mm.

356 BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS,

326 to 364™,

Barom- Parts li
Het, || N- | 0.0 | 0.1 | 0.2 | 0.3 | 0.4] 0.5 | 0.6 | 0.7 | 0.8 | 0.9 |fr ech)
Milli. | Metr.| Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. Metr. |!
326 | 14 | 10.3 12.8 15.2 17.6) 20M e225. e250 ls 27-4 20 Seletoo-on a lOse
327 || 14 | 34.7 | 37.2 | 39.6 | 42.0 | 44.5 | 46.9 | 49.3 | 51.7 | 54.2 | 56.6 |2/0.5
328 1475950) | (61:5 5.63.9. 66.3) | 687 ewe 738.6019 76.0) 0 78.408) 80.9) sien
329 14 | 83.3 | 85.7 | 88.1 90.5 | 92.9 | 95.4 | 97.8 4/1.0
| 329 || 15 00.2 | 02.6 | 05.0 |5/1.2
330 || 15 07.4 | 09.9 12.3 14.7 | 17.1 7 19.5 | 21.9 | 24.3 | 26.7 | 29:51 | 6105
331 15 | 31.5 | 33.9 | 36.3 | 38.7 | 41.2 | 43.6 | 46.0 | 48.4 | 50.8 53.2 | 7/ 1.7!
332 150)..55.6. |, 58:0 | 60:4 || 62.8 | (65.051 67.5|" 69.9) 9) 9 72°3.6 TA iil Si220
333 | 15 | 79.5 | 81.9 | 84.3 | 86.7 | 89.1 | 91.4 | 93.8 | 96.2 | 98.6 9)| 2.2
333 || 16 01.0
334 | 16 | 03.4 | 05.8 | 08.1 10.5 | 12.9 | 15.3 Dee a) 2O.0le |) 22745 Tie 2458
335 || 16 | 27.2 | 29.6 | 31.9 | 34.3 | 36.7 | 39.1 | 41.4 | 43.8 | 46.2 48.8
336 16 | 50.9 | 58.3 | 55.7 | 58.0 | 60.4 | 62.8 | 65.1 | 67.5 | 69.9 | 72.2 0.2

337 || 16 | 74.6 | 77.0 | 79.3 | 81.7 | 84.0 | 86.4 | 88.8 | 91.1 | 93.5 | 95.8
338 || 16 | 98.2
338 || 17 00.5 | 02.9 | 05.2 | 07.6
339 || 17 | 21.7 | 24.1 | 26.4 | 28.8 | 31.1
340 || 17 | 45.2 | 47.5 | 49.8 | 52.2 | 54.5
341 || 17 | 68.6 | 70.9 | 73.2 | 75.6 | 77.9
342 || 17 | 91.9 | 94.2 | 96.5 | 98.9
342 || 18 01.2
348. ||-48 | W5.1.)| 17.47 19:89| 22.40 oaee
344 || 18 | 88.3 | 40.6 | 42.9 | 45.2 | 47.6
345 | 18 | 61.4 | 63.7 | 66.0 | 68.3 | 70.6
' 346 | 18 | 84.5 | 86.8 | 89.1 | 91.4 | 93.7
346 | 19

1050) 12°35 ae 0) 1 Lore
33.4 | 35.8 | 38.1 | 40.5 | 42.8
56.9 | 59.2 | 61.5 | 63.9 | 66.2
80.2 | 82.6 | 84.9 | 87.2 | 89.5

1.0 |!

CMA OO — WwW DD =
1
no

03:55:17 05-8) 08.251) 10: 5a 512-8
26.7 | 29.0 | 31.4 | 33.7 | 36.0
49.9 | 52.2 | 54.5 | 56.8 | 59.1
73.0 | 75.3 | 77.6 | 79.9 | 82.2
96.0 | 98.3

00.6 | 02.9 | 05.2

|| 347 || 19 | 07.5 | 09.6 | 12.0 | 14.8 | 16.6 ] 18.9 | 21.2 | 23.5 | 25.8 | 28.1
348 || 19 | 30.4 | 32.7 | 34.9 | 37.2 | 39.5 | 41.8 | 44.1 | 46.4 | 48.6 | 50.9
349 | 19 | 53.2 | 55.5 | 57.8 | 60.1 | 62.3 | 64.6 | 66.9 | 69.2 | 71.5 | 73.7
350 | 19 | 76.0 | 78.3 | 80.6 | 82.8 | 85.1 | 87.4 | 89.6 | 91.9 | 94.2 | 96.5 |1)0.2
351 || 19 | 98.7 2| 0.4
351 || 20 01.0 | 03.3 | 05.5 | 07.8 | 10.1 | 12.3 | 14.6 | 16.8 | 19.1 13] 0-7
352 || 20 | 21.4 | 23.6 | 25.9 | 28.2 | 30.4 | 32.7 | 34.9 | 37.2 | 39.5. | 41.7 40.9
353 || 20 | 44.0 | 46.2 | 48.5 | 50.7 | 53.0 | 55.2 | 57.5 | 59.7 | 62.0 | 64.2 15) 1.1
354 || 20 | 66.5 | 68.7 | 71.0 | 73.2 | 75.5 | 77.7 | 80.0 | 82.2 | 84.5 | 86.7 1611.3
355 || 20 | 89.0 | 91.2 | 93.4 | 95.7 | 97.9 7| 1.6
355 || 21 00.2 | 02.4 | 04.6 | 06.9 | 09.1 |8/ 1.8
356 || 21 | 11.4 | 13.6 | 15.8 | 18.1 | 20.3 | 22.5 | 24.8 | 27.0 | 29.2 | 31:5 |olo4
357 || 21 | 33.7 | 35.9 | 38.2 | 40.4 | 42.6 | 44.8 | 47.1 | 49.3 | 51.5 | 53.7

67.1 | 69.3 | 71.5 | 73.7 | 76:0
89.3 | 91.5 | 93.7 | 95.9 | 98.1
11.4 | 13.6,| 15.8 | 18.0) | 20:2
33.4 | 35.6 | 37.9 | 40.1 42.3
55.4 | 57.6 | 59.8 | 62.0 | 64.2
77.4 | 79.6 | 81.8 | 83.9 | 86.1
99.3

358 21 | 56.0 | 58.2 | 60.4 | 62.6 | 64.9
359 21 | 78.2 | 80.4 | 82.6 | 84.8 | 87.0
360 22 | 00.3 | 02.5 | 04.8 | 07.0 | 09.2
361 22 | 22.4 | 24.6 | 26.8 | 29.0) | 31:2
362 22 | 44.5 | 46.7 | 48.9 | 51.0 | 53.2
363 22 | 66.4 | 68.6 | 70.8 | 73.0 | 75.2
364 29° 88.3 90.5 92.7 94.9 97.1
364 23 01.4 | 03.6 | 05.8 | 08.0

Barom- Parts

jeter || N. | O.0 | O.1 | 0.2 | O.3 | 0.4/0.5 | 0.6 | 0.7 | 0.8 | 0.9 ffor each

Horh. | 0.01mm.
A ! | oN A ea aes Bee eee

D 16

wah i ae ial

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS. 357

365 to 403™,.

Agence Pans
Horn,|| N- | 0.0 | 0.1 | 0.2 | 0.3 | 0.4] 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | [rr cach
Milli. || Metr.} Metres. | Metres, | Metres. | Metres. | Metres. ] Metres, | Metres. | Metres. | Metres, | Metres. Metr.
365 23 | 10.2 12.4 14.5 16.7 18.9 | 21.1 23.2 25.4 | 27.6 | 29.8 | 1, 0.2
366 23 | 32.0 ||| 34.1 36.3 38.5 | 40.7 | 42.8 | 45.0 47.2 | 49.3 | 51.5 | 20.4
367 23 | 53.7.| 55.9 | 58-0 60.2 | 62.4 | 64.5 | 66.7 68.9 WON |) 7352) esOsen!
368 23 | 75.4 | 77.5 | 79.7 | 81.8 | 84.0 | 86.2 | 88.3 | 90.5 | 92.6 | 94.8 | 4/0.9
369 || 23 | 97.0 | 99.1 5] 1.1|
369 24 01.3 03.4 | 05.6 | 07.7 | 09.9 12.1 14.2 16.4 | 6/1.3

| 370 24 |} 18.5 | 20.6 | 22.8 PHASE Ne Daria || Stee |) Bale! 33.5 BOs |eowee eealeleon

j| 371 24 } 40.0 | 42.1 44.3 46.4 | 48.6 | 50.7 | 52.9 55:0)3} 57.2 | 59:3 | 8 1.7)

| 372 24 | 61.5 | 63.6 | 65.8 G79) +) ZO 7222") 7423 76-5 78.6 |} 80.8 | 9|1.9
373 24 | 82.9 | 85.0 | 87.2 89.3 | 91.4 | 93.6 | 95.7 97.8 99.9
373 2 02.1 |

5
374 || 25 | 04.2 | 06.3 | 08.4 | 10.6 | 12.7 ] 14.8 | 16.9 | 19.0 | 21.2 | 23.3

375 25 | 25.4 | 27.5 | 29.6 | 31.8 | 33.9 | 36.0 | 38.1 | 40.2 | 42.4 | 44.5
376 25 | 46.6 | 48.7 | 50.8 | 53.0 | 55.1 | 57.2 | 59.3 | 61.4 | 63.6 | 65.7
377 || 25 | 67.8 | 69.9 | 72.0 | 74.1-| 76.2 | 78.3 | 80.5 | 82.6 | 84.7 | 86.8
378 || 25 | 88.9 | 91.0 | 93.1 | 95.2 | 97.3 } 99.4
378 || 26 01.5 | 03.6 | 05.7 | 07.8
379 || 26 | 09.9 | 12.0 | 14.1 | 16.2 | 18.3 | 20.4 | 22.5 | 24.6 | 26.7 | 28.8
380 || 26 | 30.9 | 33.0 | 35.1 | 37.2 | 39.3 | 41.3 | 43.4 | 45.5 | 47.6 | 49.7
381 26 | 51.8 | 53.9 | 56.0 | 58.1 | 60.2 | 62.2 | 64.3 | 66.4 | 68.5 | 70.6
382 || 26 | 72.7 | 74.8 | 76.9 | 78.9 | 81.0 | 83.1 | 85.2 | 87.3 | 89.3 | 91.4
383 || 26 | 93.5 | 95.6 | 97.7 | 99.7
383 || 27 01.8 | 03.9 | 06.0 | 08.1 | 10.1 | 12.2 | 1)0.2 |
384 || 27 | 14.3 | 16.4 | 18.4 | 205 | 22.6 | 24.6 | 26.7 | 28.8 | 30.9 | 32.9 |2 | 0.4 |
385 27 | 35.0 | 37.1 | 39.1 | 41.2 | 43.2 # 45.3 | 47.4 | 49.4 | 51.5 | 53.5 | 3) 0.6 |
386 27 | 55.6 | 57.7 | 59.7 | 61.8 | 63.8 | 65.9 | 68.0 | 70.0 | 72.1 | 74.1 | 4 0.9 |
387 || 27 | 76.2 | 78.3 | 80.3 | 82.4 | 84.4 | 86.5 | 88.6 | 90.6 | 92.7 | 94.7 15) 1.1
| 388 27 | 96.8 | 98.8 6| 1.3
388 28 00.9 | 02.9 | 05.0 | 07.0 | 09.1 | 11.1 | 13.2 | 15.2 | 7/ 1.5
389 28g Vea) 1965) 204 23-24) 82525 0 27-50 29.6) S16.) Saat |) Sd47) |S) | lez
390 || 28 | 37.8 | 39.8 | 41.9 | 43.9 | 46.0 | 48.0 | 50.0 | 52.1 | 54.1 | 56.2 |9/1.9
391 28 | 58.2 | 60.2 | 62.3 | 64.3 | 66.3 |] 68.3 | 70.4 | 72.4 | 74.4 | 76.5
392 28 | 78.5 | 80.5 | 82.6 | 84.6 | 86.6 | 88.6 | 90.7 | 92.7 | 94.7 | 96.8
393 28 | 98.8

393 29 00.8 | 02.8 | 04.9 | 06.9 | 08.9 | 10.9 | 12.9 | 15.0 | 17.0
394 295 PESO 21-01) 23:0) 25.09) (27-0 I) 2951 | Sit) || S320 35.2) |) 37-2
| 395 29 | 39.2) 41.2 | 43.2 | 45.2 | 47.2 | 49.2 | 51.3 | 53.3 | 55.3. | 57.3
396 29 | 59.3 | 61.3 | 63.3 | 65.3 | 67.3 | 69.3 | 71.4 | 73.4 | 75.4 | 77.4
397 29 | 79.4 | 81.4 | 83.4 | 85.4 | 87.4 | 89.4 | 91.5 | 93.5 | 95.5 | 97.5

399 || 30 | 19.5 | 21.5 | 23.5 | 25.5 | 27.5 | 29.4 | 31.4 | 33.4 | 35.4 | 37.4

400 || 30 | 39.4 | 41.4 | 43.4 | 45.4 | 47.4 | 49.4 | 51.3 | 53.3 | 55.3 | 57.3
401 || 30 | 59.3 | 61-3 | 63.3 | 65.2 | 67.2 | 69.2 | 71.2 | 73.2 | 75.1 | 77.1
402 |) 30 | 79.1 | 8'.1 | 83.1 | 85.0 | 87.0 | 89.0 | 91.0 | 93.0 | 94.9 | 96.9
403 || 30 | 98.9

cor’ | N- | 0.0/0.1 | 0.2/0.3 0.4 0.5 0.6 0.7 | 0.8 | 0.9 jor Sen
ghar 0.01mm, |

29 | 99.5 |
30 01.5 | 03.5 | 05.5 | 07.5 | 09.5 | 11.5 | 13.5 | 15-5 | 17.5

358 BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS.
408 to 442,

Barom-

I cet || N. | 0.0 | 0.1 | 0.2 | 0.3 | 0.4] 0.5 | 0.6

‘| Milli. || Metr.| Metres. | Metres. | Metres. | Metres. | Metres | Metres. | Metres.
403 | 31 00.9 02.8 04.8 06.8 | 08.7 10.7

| 404 || 31 18.6 20.6 22:5 24.5 | 26.5 | 28.4 30.4

|| 405 || 31 | 38.3 | 40.3 | 42.2 | 44.2 | 46.1 | 48.1 | 50.1
406 Slee aris) 59.9 61.8 63.8 | 65.7 | 67.7 69.7
407 31 77.5 79.5 $1.4 83.4 | 85.3 | 87.3 89.3
408 Seid 99.0

408 32 01.0 02.9 | 04.9 | 06.8 08.8
409 32 | 16.6 18.5 20.5 22.4 | 24.4 | 26.3 28.2
410 S2F i) 36.0") S79 39.9 41.8 | 43.8 | 45.7 47.6
411 S2ieo0s4 57.3 59.3 6122" 7), 163-21 465:1 67.0
412 SYo |e Be) 76.7 78.7 80.6 | 82.5 }| 84.4 86.4
413 32 | 94.1 96.0 97.9 99.9

413 33 01.8 | 03.7 05.6
414 Souililoss 15.2 17.1 19.1 21.0 | 22.9 24.8
415 33 | 32.5 34.4 36.3 38.3 40.2 | 42.1 44.0
416 Soot iO Led 53.6 55.5 57.4 | 59.3 | 61.2 63.2
417 33) | 440.8 72.7 74.6 76.5 | 78.4 | 80.3 82.3
418 Son loose, 91.8 93.7 95.6 | 97.5 | 99.4
418 34 01.3
419 84 | 08.9 10.8 12.7 14.6 16.5 | 18.4 20.3
420 S40) 2739 29.8 31.7 33.6 Sedo Ni edes 39.2
421 34 | 46.8 48.7 50.6 52.5 54.4 | 56.2 58.1
422 || 34 | 65.7 |. 67.6 69.5 71.4 73.3 | 75.1 77.0
423 34 | 84.6 | 86.5 88.4 | 90.2 92.1 | 94.0 | 95.9
423 35
424 35 | 03.4 05.3 07.2 09.0 10.9 | 12.8 14.7
425 85 | 22.2 24.1 25.9 27.8 29.6 | 31.5 33.4
426 || 35 | 40.8 | 42.7 | 44.5 | 46.4 | 48.3 | 50.1 | 52.0
427 35 | 59.5 61.4 63.2 65.1 67.0 | 68.8 70.7
428 35 | 78.2 80.1 81.9 83.8 | 85.6 | 87.5 | 89.4
429 35 | 96.5 98.6
429 36 00.5 02.3 | 04.2 | 06.0 07.9
430 86 | 15.3 17.1 19.0 20.8 22.7 | 24.6 26.4
431 36 | 33.8 | 35.6 37.9 39.3 41.2 | 43.0 44.8
432 36 | 52.2 54.0 50.9 57.7 | 59.6 | 61.4 | 63.2
433 36 | 70.6 ident 74.3 76-1 78.0 | 79.8 | 81.6
434 36 | 89.0 | 90.8 92.7 94.5 | 96.3 | 98.1
434 37 00.0
435 37 | 07.3 09.1 11.0 12.8 14.6 | 16.4 18.3
436 | S37 e200 27.4 29.2 31.1 32.9 | 34.7 | 36.5
437 || 87 | 43.8 45.6 47.5 49.3 | 51.1 | 52.9 54.8
438 87 | 62.1 63.9 65.7 67.6 | 69.4 | 71.2 73.0
439 37 | 80.3 | 82.1 83.9 85.7 | 87.5 | 89.3 | 91.2
440 37 | 98.4
440 38 00.2 02.0 | 03.8 | 05.6 | 07.5 09.3
44] 38 | 16.5 18.3 20.1 21:9 g23-46 [ee 27.3
442 88 | 34.5 36.3 38.1 39.9 | 41.7 ] 43.5 45.3
Barom-

far N.| 0.0 | O.1 | 0.2 | 0.3 | 0.4 10.5 | 0.6
or h. salts

Parts

0.7 | 0.8 | 0.9

18

Metres.
12.7
32.4
52.0
71.6
91.2

10.7
30.2
49.6
69.0
88.3

07.5
26.7
45.9
65.1
84.2

03.2
22.2
41.1
60.0
78.9
97.8

16.6

35.2
53.9
72.6
91.2

09.7
28.2
46.7
65.1
83.5

01.8
20.1
38.3
56.6
74.8
93.0

11.1
29.1
47.1

0.7

Metres.
14.7
34.4
54.0
73.6
93.2

12.7
32.1
51.5
70.9
90.2

09.5
28.7
47.9
67.0
86.1

05.1
24.1
43.0
61.9
80.8
99.6

18.4

37.1
55.8
74.5
93.1

11.6
30.1
48.5
66.9
85.3

03.6
219
40.2
58.4
76.7
91.8

12.9
30.9
48.9

0.8

Metres.

16.6
36.3
55.9
75.5
95.1

14.6
34.1
53.5
72.9
92.2

11.4
30.6
49.8
68.9
88.0

07.0
26.0
44.9
63.8
82.7

01.5
20.3

38.9
57.6
76.3
914.9

13.4
31.9
50.4
68.8
87.2

05.5
238
42.0
60.3
78.5
96.6

14.7
32.7
50.7

0.9

for each
00lmm.

for each
0.01mm,

Metr.
1,;0.2
2/0.4
3 | 0.6

1} 0.2
2| 0.4
3| 0.6
4|0.8
5|1.0
6| 1.2
7|1.4
8| 1.6
9/1.8

Parts

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS. 359

443 to 482™™,

Barom- |\ Tenth of Millimetre. Parts

Lees N. | 0.0 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 [fr cach
Milli. || Metr.| Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres, | Metres. Metr.
443 || 38 | 52.5 | 54.3 | 56.1 | 57.9 | 59.7 | 61.4 | 63.2 | 65.0 | 66.8 | 68.6
444 || 38 | 70.4 | 72.2 | 74.0 | 75.8 | 77.6 | 79.3 | 81.1 | 82.9 | 84.7 | 86.5
445 || 38 | 88.3 | 90.1 | 91.9 | 93.7 | 95.5 | 97.2 | 99.0
445 || 39 00.8 | 02.6 | 04.4
446 || 39 | 06.2 | 08.0 | 09.8 | 11.5 | 13.3 | 15.1 | 16.9 | 18.7 | 20.4 | 22.2 |

‘| 447 || 39 | 24.0 | 25.8 | 27.6 | 29.3 | $1.1 | 32.9 | 34.7 | 36.5 | 38.2 | 40.0 |

|| 448 || 39 | 41.8 | 43.6 | 45.4 | 47.1 | 48.9 | 50.7 | 52.5 | 54.3 | 56.0 | 57.8

| 449 || 39 | 59.6 | 61.4 | 63.1 | 64.9 | 66.7 | 68.4 | 70.2 | 72.0 | 73.8 | 75.5
450 || 39 | 77.3 | 79.1 | 80.8 | 82.6 | 84.3 | 86.1 | 87.9 | 89.6 | 91.4 | 93.1
451 || 39 | 94.9 | 96.7 | 98.4
451 || 40 00.2 | 02.0 | 03.7 | 05.5 | 07.3 | 09.1 | 10.8
| 452 || 40 | 12.6 | 14.4 | 16.1 | 17.9 | 19.6 | 21.4 | 23.2 | 24.9 | 26.7 | 28.4
| 453 || 40 | 30.2 | 32.0 | 33.7 | 35.5 | 37.2 | 39.0 | 40.8 | 42.5 | 44.3 | 46.0
454 || 40 | 47.8 | 49.5 | 51.3 | 53.0 | 54.8 | 56.5 | 58.3 | 60.0 | 61.8 | 63.5
455 || 40 | 65.3 | 67.0 | 68.8 | 70.5 | 72.3 | 74.0 | 75.8 | 77.5 | 79.3 | 81.0 | 1) 0.2
456 || 40 | 82.8 | 84.5 | 86.3 | 88.0 | 89.8 | 91.5 | 93.2 | 95.0 | 96.7 | 98.5 | 2/0.3
457 || 41 | 00.2 | 01.9 | 03.7 | 05.4 | 67.2 | 08.9 | 10.6 | 12.4 | 14.1 | 15.9 | 3/0.5
458 || 41 | 17.6 | 19.3 | 21.1 | 22.8 | 246 } 26.3 | 28.0 | 29.8 | 31.5 | 33.3 | 4|0.7
459 || 41 | 35.0 | 36.7 | 38.5 | 40.2 | 41.9 | 43.6 | 45.4 | 47.1 | 48.8 | 50.6 |5/0.9
460 || 41 | 52.3 | 54.0 | 55.8 | 57.5 | 59.2 | 60.9 | 62.7 | 64.4 | 66.1 | 67.9 | 6|1.0
461 || 4%..| 69.6. | 71.3, |. 73.1.| 74.8. | 76.5.1 78.2 -|. 80.0 |. 81.7 .|, 83.4 |. 85.2, | 7} 1.2
462 || 41 | 86.9 | 88.6 | 90.3 | 92.1 | 93.8 | 95.5 | 97.2 | 98.9 8} 1.4
| 462 || 42 00.7 | 02.3 | 911.6 |
463 || 42 | 04.1 | 05.8 | 07.5 | 09.3 | 11.0 | 12.7 | 14.4 | 16.1 | 17.9 | 19.6
464 || 42.| 21.3 | 28.0 | 24.7 | 26.4 | 28.1 | 29.8 | 81.6 | 33.3 | 35.0 | 36.7
465 || 42 | 38.4 | 40.1 | 41.8 | 43.5 | 45.2 | 46.9 | 48.7 | 50.4 | 52.1 | 53.8
466 || 42 | 55.5 | 57.2 | 58.9 | 60.6 | 62.3 | 64.0 | 65.8 | 67.5 | 69.2 | 70.9
467 || 42 | 72.6 |+74.3 | 76.0 | 77.7 | 79.4 | 81.1 | 82.8 | 84.5 | 86.2 | 87.9
468 || 42 | 89.6 | 91.3 | 93.0 | 94.7 | 96.4 | 98.1 | 99.8
468 || 43 01.5 | 03.2 | 04.9
469 || 43 | 06.6 | 08.3 | 10.0 | 11.7 | 13.4 | 15.1 | 16.8 | 18.5 | 20.2 | 21.9
#70: ||) 43. | 23.6_| 25.3 | 27.0..|. 28.7. |, 30.4.) 32.0. |. 33.7 |, $5.4..| 37.1, |. 38.8
471 || 43 | 40.5 | 42.2 | 43.9 | 45.6 | 47.3 | 48.9 | 50.6 | 52.3 | 54.0 | 55.7
472 || 43 | 57.4 | 59.1 | 60.8 | 62.5 | 64.2 | 65.8 | 67.5 | 69.2 | 70.9 | 72.6
473 || 43 | 74.3.| 76.0 | 77.7. | 79.8.| 81.0. | 82.7 |. 84.4 | 86.1.| 87.7 |. 89.4
474 || 43 | 91.1 | 92.8 | 94.5 | 96.1 | 97.8 | 99.5
A74 || 44 01.2 | 02.9 | 04.5 | 06.2
475 || 44 | 07.9 | 09.6 | 11.2 | 12.9 | 14.6 | 16.2 | 17.9 | 19.6 | 21.3 | 22.9
| 476 || 44 | 24.6 | 26.8 | 27.9 | 29.6 | 31.3 | 33.9 | 35.6 | 37.3 | $9.0. | 40.6
| 477 || 44 | 41.3 | 48.0 | 44.6 | 46.3 | 48.0 | 49.6 | 51.3 | 53.0 | 54.7 | 56.3
| 478 || 44 | 58.0 | 59.7 | 61.3 | 63.0 | 64.7 | 66.3 | 68.0 | 69.7 | 71.4 | 73.0
479 || 44.| 74.7 | 76.4 | 78.0 | 79.7 | 81.3 | 83.0 | 84.7 | 86.3 | 88.0 | 89.6
480 || 44 | 91.3 | 93.0 | 94.6 | 96.3 | 97.9 | 99.6
480 || 45 01.3 | 02.9 | 04.6 | 06.2
481 || 45 | 07.9 | 09.5 | 11.2 | 12.8 | 14.5 [| 16.1 | 17.7.| 19.4 | 21.0 | 22.7
482 || 45 | 24.3 | 25.9 | 27.6 | 29.2 | 30.9 | 32.5 | 34.2 | 35.8 | 37.5 | 89.1
Born N. | 0.0 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 lpr each
Hor kh. a | 0.0lmm..

D 19

860 BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS.

483 to 524",

Neen ; | [_ Part
Wenn: N. | 0.0 | 0.1 | 0.2 | 0.3 | 0.4 10.5 | 0.6 | 0.7 | O.8 | 0.9 erent

Milli. || Metr.| Metres. | Metres, | Metres. | Metres, | Metres | Metres. | Metres. | Metres. | Metres. | Metres. Metr. ;
453 45 | 40.8 42.4 44.1 45.7 47.4 | 49.0 50.7 52.3 54.0 55.6 |1)0.2
484 45 | 57.3 58.9 60.6 62.2 63.9 | 655 67.1 68.8 70.4 2M N2AOLS
485 45 | 73.7 Td.3 77.0 78.6 80.3 | 81.9 83.6 85.2 86.9 88.5 |3/0.5

74

486 45 | 90.2 | 91.8 | 93.5 | 95.1 | 96.8 | 98.4 4| 0.6
486 46 00.0 | 01.7 | 03.3 | 05.0 | 5/0.8
487 46 | 06.6 | 08.2 | 09.9 | 11.5 | 13.1 } 14.7 | 16.4 | 18.0 | 19.6 | 21.3 | 6] 1.0
488 46 | 22.9°| 24.5 °| 26.2 | 27.8 | 29.4 1 31.0-) 32-7 °| 34.3] 35:9 | 3756) | 7) aed

489 46 | 39.2 | 40.8 | 42.4 | 44.1 45.7 | 47.3 -| 48.9 | 50.5 | 52.2 | 53.8 | 8 | 1.5
490 46 | 55.4 | 57.0 | 58.6 | 60.3 | 61.9 | 63.5 | 65.1 | 66.7 | 68.4 | 70.0 |9/1.4
491 AG 7156 9) Fde2. |) 7459: + 76.59 78th 7ON7 © | Sia) 8350" | 846m 8683
492 AG | 87.9. | 89-5 | O11 | 9228, || 94-4 96:0.,| 9726", 99.2
492 47 00.9 | 02.5
493 AG 04.0 | 05:7) 003 O89) \/ TONS Al P2s0s | NS S8e | Sea) 1 7eOme ls SES
494 47 | 20.2 | 21.8 | 23.4 | 25.0 | 26.6 | 28.2 | 29.9 | 31.5 | 33.1 34.7
495 AT 36.3)" Sue9) |) S955) Waits a2 7e A asSi 45.9 | AZo 49d 50.7
496 AT |" 52:3) |§53-9) | 55.5) | Sue | (08.7 1 60-3) 161-9 |! 63.5) | 65st G60
497 AG | 68:3" 69:9) ) Ab F3- | TART | W623) | FSO) 79-6" 81-2 8258
498 || 47 | 84.4 | 86.0 | 87.6 | 89.2 | 90.8 | 92.4 | 94.0 | 95.6 | 97.2 | 98.8
499 48 | 00.4 | 02.0 | 03.6 | 05.2 | 06.8 | 08.3 | 09.9 | 11.5 | 13.1 14.7

500 || 48 | 16.3 | 17.9 | 19.5 | 21.1 | 22.7 | 24.2 | 25.8 | 27.4 | 89.0 | 30.6
501 || 48 | 32.2 | 33.8 | 35.4 | 37.0 | 38.6 | 40.1 | 41.7 | 43.3 | 44.9 | 46.5
| 502 || 48 | 48.1 | 49.7 | 51.3 | 52.9 | 54.5 | 56.0 | 57.6 | 59.2 | 60.8 | 62.4
503 || 48 | 64.0 | 65.6 | 67.2 | 68.7 | 70.3 | 71.9 | 73.5 | 75.1 | 76.6 | 78.2
504 || 48 | 79.8 | 81.4 | 83.0 | 84.5 | 86.1 | 87.7 | 89.3 | 90.9 | 92.4 | 94.0
| 505 || 48 | 95.6 | 97.2 | 98.7
' 505 || 49 00.3 | 01.9 | 03.4 | 05.0 | 06.6 | 08.2 | 09.7
506 || 49 | 11.8 | 12.9 | 14.4 | 16.0 | 17.6 | 19.1 | 20.7 | 22.3 | 23.9 | 25.4
507 || 49 | 27.0 | 28.6 | 30.1 | 31.7 | 33.3 | 34.8 | 36.4 | 38.0 | 39.6. 41.1
508 || 49 | 42.7 | 44.3 | 45.8 | 47.4 | 49.0 | 50.5 | 52.1 | 53.7 | 55.3 | 56.8
| 509 || 49 | 58.4 | 60.0 | 61.5 | 63.1 | 64.6 | 66.2 | 67.8 | 69.3 | 70.9 | 72.4
510 || 49 | 74.0 | 75.6 | 77.1 | 78.7 | 80.2 | 81.8 | 83.4 | 84.9 | 86.5 | 88.0
511 || 49 | 89.6 | 91.2 | 92.7 | 94.3 | 95.8 | 97.4 | 99.0
511 || 50 : ; 00.5 | 02.1 | 03.6
512 || 50 | 05.2 | 06.7 | 08.3 | 09.8 | 11.4 | 12.9 | 14.5 | 16.0 | 17.6 | 19.1
50 | 20.7 | 22.2 | 23.8 | 25.3 | 26.9 | 28.4 | 30.0 | 31.5 | 35.1 | 34.6
514 || 50 | 36.2 | 37.7 | 39.3 | 40.8 | 42.4 | 43.9 | 45.5 | 46.0 | 48.6 | 50.1
515 || 50 | 51.7 | 53.2 | 54.8 | 56.3 | 57.9 | 59.4 | 61.0 | 62.5 | 64.1 | 65.6
50 | 67.2 | 68.7 | 70.3 | 71.8 | 73.4 | 74.9 | 76.4 | 78.0 | 79.5 | 81.1
517 || 50 | 82.6 | 84.1 | 85.7 | 87.2 | 88.7 | 90.2 | 91.8 | 93.3 | 94.8 | 96.4
518 || 50 | 97.9 | 99.4
51 01.0 | 02.5 | 04.1 | 05.6 | 07.1 | 08.7 | 10.2 | 11.8
519 || 51 | 13.8 | 14.8 | 16.4 | 17.9 | 19.4 | 20.9 | 22.5 | 24.0 | 25.5 | 27.1
520 || 51 | 28.6 | 30.1 | 81.7 | 33:2 | 34.7 | 36.2 | 37.8 |(39.3 | 40.8 | 42%
521 || 51 | 43.9 | 45.4 | 47.0 | 48.5 | 50.0 | 51.5 | 53.1 | 54.6 | 56.1 | 57.7
522 || 51 | 59.2 | 60.7 | 62.2 | 63.8 | 65.3 | 66.8 | 68.3 | 69.8 | 71.4 | 72.9 |
23 || 51 | 74.4 | 75.9 | 77.5 | 79.0 | 80.5 | 82.0 | 83.6 | 85.1 | 86.6 | 88.2
24 || 51 | 89.7 | 91.2 | 92.7 | 94.3 | 95.8 | 97.3 | 98.8

or
—_
ow

)
—_
~

On
_
a

oO
_
a

[arom- arts
cer | N. | 0.0 | 0.1 | 0.2! 0.3 | 0.41 0.5 | 0.6 | 0.7 | 0.8 | 0.9 [or tah
5 | | \0 Ol mm |

BAROMETRICAL

524 to 565".

Metres.

MEASUREMENT OF HEIGIITS. — DELCROS.

0.6 | 0.7 | 0.8 | 0.9

14.0
29.1
A4,2
49.3
“4.3
89.3

04.3
19.3
34.2
49.1
64.0
78.9
93.7

08.5
23.3
38.0
52.7
67.4
82.1
96.7

11.3
26.0
40.5
55.0
69.5

84.0
98.4

12.8
27.2
41.6
56.0
70.3
84.6
98.9

toa
27.3
41.5
55.7
69.8
83.9
98.0

Metres.

00.3
15.5
30.6
45.7
60.8
75.8
90.8

05.8
20.8
35.7
50.6
65.5
80.4
95.2

10.0
24.8
39.5
54.2
68.9
83.5
98.1

128
27.4
41.9
56.4
70.9

85.4
99.9

14.3
28.7
43.1
57.4
71.7
86.0

00.3
14.5
28-7
42.9
57.1
71.2
85.3
99.4

0.7

Metres.
01.9

17.0
32.1
47.2
62.3
77.3
92.3

07.3
22.3
37.2
52.1
67.0
81.8
96.6

11.4
26.2
41.0
55.7
70.4
85.0
99.6

14.3
28.9
43.4
Duo
72.4

86.9

01.3
15.7
30.1
44.5
58.8
73-1
87.4

01.7
16.0
30.2
44.4
58.5
72.6
86.7

0.8

Metres.
03.4
18.5
33.6
48.7
63.8
78.8
93.8

08.8
23.8
38.7
53.6
68.5
83.3
98.1

12.9
27.0
42.4
57.1
71.8
86.4

01.0
15.7
30.3
44.8 ©
59.3
73.8

88.3

02.8 | 10.1
Meee /0-3
SEG wo a| (et
46.0 | 4,0.6
60.3 | 5) 0.7
746 |6)0.8
88.9 | 7

3.2 |9
17.4
31.6
45.8
59.9
74.0
88.1

Parts

0.9

me OD
So
_

Oo matn on
—_
oS

et | x. | 0.0 | 0.1 | 0.2 | 0.3 | 0.4] 0.5
| Milli. || Metr.| Metres. | Metres. | Metres. | Metres. | Metres }| Metres.
524 || 52
525 || 52 | 04.9 | 06.4 | 07.9 | 09.4 | 10.9 | 12.4
526 || 52 | 20.0 | 21.5 | 23.0 | 24.5 | 26.0 | 27.5
527 || 52 | 35.1 | 36.6 | 38.1 | 39.6 | 41.1 | 42.6
528 || 52 | 50.2 | 51:7 | 53.2 | 54.7 | 56.2 | 57.7
529 || 52 | 65.3 | 66.8 | 68.3 | 69.8 | 71.3 ] 72.8
530 || 52 | 80.3 | 81.8 | 83.3 | 84.8 | 86.3 } 87.8
! 531 || 52 | 95.3 | 96.8 | 98.3 | 99.8
531 || 53 01.3 | 02.8
532 || 53 | 10.3 | 11.8 | 13.3 | 14.8 | 16.3 | 17.8
533 || 53 | 25.3 | 26.8 | 28.3 | 29.8 | 31.3 | 32.7
534 || 53 | 40.2 | 41.7 | 43.2 | 44.7 | 46.2 | 47.6
535 || 58 | 55.1 | 56.5 | 58.1 | 59.6 | 61.1 | 62.5
536 || 53 | 70.0 | 71.5 | 73.0 | 74.4 | 75.9 | 77-4
537 || 53 | 84.8 | 86.3 | 87.8 | 89.2 | 90.7 | 92.2
538 || 53 | 99.6
538 || 54 01.1 | 02.6 | 04.0 | 05.5 | 07.0
539 || 54 | 14.4 | 15.9 | 17.4 | 18.8 | 20.3 | 21.8
540 || 54 | 29.2 | 30.7 | 32.1 | 33.6 | 35.1 | 36.5
541 || 54 | 43.9 | 45-4 | 46.8 | 48.3 | 49.8 | 51.2
542 || 54 | 58.6 | 60.1 | 61.5 | 63.0 | 64.5 | 66.0
5430|| 540) FS) | 74:80) 76.29) 77:7 ||| 71a) 80.6
544 || 54 | 87.9 | 89.4 | 90.8 | 92.3 | 93.7 | 95.2
544 || 55
545 |; 55 | 02.5 | 04.0 | 05.4 | 06.9 | 08.4 | 09.8
546 || 55 | 17.2 | 18.7 | 20.1 | 21.6 | 23.0 | 24.5
547 || 55 | 31.8 | 33.3 | 34.7 | 36.1 | 37.6 ] 39.0
548 || 55 | 46.3 | 47.7 | 49.2 | 50.6 | 52.1 | 53.5
549 || 55 | 60.8 | 62.2 | 63.7 | 65.1 | 66.6 | 68.0
550 || 55 | 75.3 | 76.7 | 78.2 | 79.6 | 81.1 | 82.5
551 || 55 | 89.8 | 91.2 | 92.7 | 94.1 | 95.6 | 97.0
551 || 56
552 || 56 | 04.2 | 05.6 | 07.1 | 08.5 | 10.0 | 11.4
553 || 56 | 18.6 | 20.0 | 21.5 | 22.9 | 24.4 | 23.8
554 || 56 | 33.0 | 34.4 | 35.9 | 37.3 | 38.8 ] 40.2
555 || 56 | 47.4 | 48.8 | 50.3 | 51.7 | 53.1 | 54.5
556 || 56 | 61.7 | 63.1 | 64.6 | 66.0 |. 67.4 | 68.8
557 || 56 | 76.0 | 77.4 | 78.9 | 80:3 | 81.7 | 83.1
558 | 57 | 90.3 | 91.7 | 93.2 | 94.6 | 96.0 | 97.4
558 || 57
| 559 || 57 | 04.6 | 06.0 | 07.4 | 08.9 | 10.3 | 11.7
| 560 || 57 | 18.8 | 20.2 | 21.6 | 23.1 | 24.5 | 25.9
i| 561 || 57 | 33.0 | 34.4 | 35.8 | 37.3 | 38.7 | 40.1
562 || 57 | 47.2 | 48.6 | 50.0 | 51.4 | 52.8 | 542
| 563 || 57 | 61.3 | 62.7 | 64.1 | 65.5 | 66.9 | 68.3
564 || 57 | 75.4 | 76.8 | 78.2 | 79.6 | 81.0 | 82.4
565 || 57 | 89.5 | 90.9 | 92.4 | 93.8 | 95.2 | 96.6
Bol N. | 0.0 | 0.1 | 0.2 | 0.8 | 0.4] 0.5 | 0.6
|| Horh
D pa

for each
0.01inm,

362 BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS.,

565 to 605",

Se

Bairom- |

Parts {
eter for each
et, | N. | 0.0 0.41 0.5 0.6 | 0.7 | 0.8 | 0.9 Hii
Milli. || Metr.| Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. Met.
565 58 00.8 02.2

566 58 | 03.6 | 05.0 | 06.4 | 07.8 | 09.2 | 10.6 | 12.1 13.5 | 14.9 | 16.3
| 567 58 | 17.7 | 19:1 | 20.5 | 21.9 | 23-3.) 24.0% | 26.1] 27.5°') 28.9'\| 30:3

31.7.| 33.1 | 34.5 | 35.9 | 37.3 | 38.7 | 40.1 | 41.5 | 42.9 | 44.8
45.7 | 47.1 | 48.5 | 49.9 | 51.3 | 52.7 | 54.1 | 55.5 | 56.9 | 58.3
5927°) G11 | 62.5° | 63:9)-| (65:3) i] 6627 || G851>5| 69250) FO9h)| 7223
1 73.7 | 75.1 | 76.5 | 77.9 | 79.3 | 80.6 | 82.0 | 83.4 | 84.8 | 86.2
572 58 | 87.6 | 89.0 | 90.4 | 91.8 | 93.2 | 94.5 | 95.9 | 97.3 | 98.7
572 59 00.1
573
574 59 | 15.4 | 16.8 | 18.2 | 19.6 | 21.0 | 22.3 | 23.7 | 25.1 | 26.5 | 27.9

575 59 | 29.3 | 30.7 | 32.1 | 33.4 | 34.8 | 36.2 | 37.6 | 39.0 | 40.3 | 41.7
576 59 | 43.1 | 44.5 | 45.9 | 47.2 | 48.6 | 50.0 | 51.4 | 52.8 | 54.1 | 55.5 | 1/)0.1 |;
577 59 | 56.9 | 58.3 | 59.7 | 61.0 | 62.4 | 63.8 | 65.2 | 66.6 | 67.9 | 69.3
578 59 | 70.7 | 72.1 | 73.5 | 74.8 | 76.2 | 77.6 | 79.0 | 80.4 | 81.7 | 83.1
579 59 | 84.5 | 85.9 | 87.2 | 88.6 | 90.0 | 91.3 | 92.7 | 94.1 | 95.5 | 96.8
580 59 | 98.2 | 99.6

580 60 00-9 | 02.3 | 03.7 | 05.0 | 06.4 | 07.8 | 09.2 | 10.5
581 || 6O'| 11-99) 18:3h) 14368) 160M) 1749] 18274) 201M). STtoR) “B2I9R} Baro
582 60 | 25.6 | 27.0 | 28.3 | 29.7 | 31.1 | 32.4 | 33.8 | 35.2 | 36.6 | 37.9
583 60 | 39.3 | 40.7 | 42.0 | 43.4 | 44.7 | 46.1 | 47.5 | 48.8 | 50.2 | 51.5

Connon kk W DY
o
wo

i
59 01.5 02.9 04.3 05.7 07.1 08.4 09.8 11.2 12.6 14.0
|
|
(
{
|
|

584 60 | 52.9 | 54.3 | 55.6 | 57.0] 58.4 | 59.7 | 61.1 | 62.5 | 63.9 | 65.2
585 60 | 66.6 | 68.0 | 69.3 | 70.7 | 72.0 | 73.4 | 74.8 | 76.1 | 77.5 | 78.8
586 60 | 80.2 | 81.6 | 82.9 | 84.3 | 85.6 | 87.0 | 88.4 | 89.7 | 91.1 | 92.4
587 60 | 93.8 | 95.1 | 96.5 | 97.8 | 99.2

587 61 00.5 | 01.9 | 03.2 | 04.6 | 05.9

S Oo J ot Xo aa) C » or or Or
eV VV 1D DS

owe w

or Or Or or

nwmm nm

588 614| 07-3) | (0856'%) 10L0%9) WSS D207 af TALON 15845) 63a See) Tose
589 61>} 20:8) | 22.0%) 23250! (24.85)| 262255627251) 28.9%) 302 Slams 229
590 61) (84239) 352654)" STON S8ise | SOT AMO aaa Asie Aslam AG
591 61 | 47.8 | 49.1 | 50.5 | 51.8 | 53.2 | 54.5 | 55.9 | 57.2 | 58.6 | 59.9

592 61 61.3 62.6 64.0 65.3 66.7 | 68.0 69.3 70.7 72.0 73.4
593 61 74.7 76.0 74 78.7 80.1 81.4 82.7 84.1 85.4 86.8
594 61 838.1 89.4 | 90.8 92.1 93.5 | 94.8 96.1 97.5 98.8
594 | 62 00.2 |
595 62 01.5 02.8 04.2 05.5 06.9 | 08.2 09.5 10.9 12.2 13.6 |
596 62 14.9 16.2 17.6 18.9 20.2 | 21.5 22.9 DAE? 25.5 26.9 |
597 62 28.2 29.5 30.9 $2.2 | 33.6 | 34.9 36.2 37.6 38.9 40.3

598 62 41.6 42.9 44.3 45.6 46.9 |} 48.2 49.6 50.9 52.2 53.6 |
599 62 54.9 56.2 57.6 58.9 60.2 | 61.5 62.9 64.2 65.5 66.9 |
600 62 68.2 62.5 70.8 Waen 73.5 | 74.8 76.1 77.4 78.8 | 80.1
601 62 81.4 82.7 | 84.1 85.4 | 86.7 | 88.0 | 89.4 90.7 92.0 | 93.4

602 62 94.7 96.0 | 97.3 98.7

602 63 00.0 } 01.3 02.6 03.9 05.3 06.6

603 63 07.9 09.2 10.5 11.9 13.2 | 14.5 15.8 17.1 18.5 19.8

604 63 21.1 22.4 232% 25.1 26.4 | 27.7 29.0 30.3 31.7 33.0

| 605 | 63 34.3 35.6 36.9 38.2 39.5 | 40.8 42.2 43.5 44.8 46.1

Barom-| v1 9.0 | 0.1 | 0.2 | 0.8 | 0.4] 0.5 | 0.6 | 0.7 | 0.8 | 0.9 [een
Horb. | 0.01mm.

eee — ———— }
)) 22

i

BAROMETRICAL MEASUREMENT OF HEIGHTS, —— DELCROS. 363

Sa

Baror: | '

606 to 647"™.
eter | N. 0.0 | 0.1 0.2 | 0.3

“pten 0.4] 0.5 | 0.6 | 0.7 | 0.8 | 0.9 a

'| Milli. || Metr.} Metres. | Metres. | Metres. | Metres. | Metres.} Metres. | Metres. Metres. | Metres. | Metres. Metr.
606 63 | 47.4 | 48.7 50.0 | 51.3 52.6 | 53.9 55.3 56.6 57.9 | 59.2

607 63 | 60.5 | 61.8 63.1 64.5 | 65.8 | 67.1 68.4 | 69.7 | 71.1 72.4

608 63H) Warton 50) | 76-3 77.6 | 78.9 | 80.2 | 81.5 | 82.8 | 84.1 85.4

| 609 63 | 86.7 | 88.0 | 89.3 | 90.6 | 91.9 | 93.2 | 94.6 95.9 97.2 | 98.5

610 63 | 99.8

‘| 610 64 01.1 02.4 | 03.7 | 05.0 |] 063
611 64 | 12.8 |} 14.1 15.4 16.7 18.0 | 19.3
|| 912 || 64 | 25.9 | 27.2 | 28.5 | 29.8 | 31.1 | 32.4
\| 613 64 | 38.9 | 40.2 41.5 | 42.8 44.1 ] 45.4
614 64 | 51.9 | 58.2 | 54.5 55.8 57.1 | 58.3
| 615 || 64 | 64.8 | 66.1 | 67.4 | 68.7 | 70.0 | 71.2
616 64 | 77.7 | 79.0 | 80.3 | 81.6 | 82.9 | 84.2

07.6 | 08.9 | 10.2 | 11.5
20.7 | 22.0 | 23.3 | 24.6
33.7 | 35.0 | 36.3 | 37.6
46.7 | 48.0 | 49.3 | 50.6
59.6 | 60.9 | 62.2 | 63.5
72.5 | 73.8 | 75.1 | 76-4
85.5 | 86.8 | 88.1 | 89.4

| 617 || 64 | 90.7 | 92.0 | 93.3 | 94.6 | 95.9 | 97.1 | 98.4 | 99.7

| 617 || 65 01.0 | 02.3

| 618 || 65 | 03.6 | 04.9 | 06.2 | 07.4 | 03.7 | 10.0 | 11.3 | 12.6 | 13.8 | 15.1
619 || 65 | 16.4 | 17-7 | 19.0 | 20.3 | 21.6 | 22.8 | 24.1 | 25.4 | 26.7 | 28.0

i 620 || 65 | 29.3 | 30.6 | 31.9 | 33.1 | 34.4 | 35.7 | 37.0 | 38.3 | 39.5 | 40.8

| G21 |] 65 | 42.1 | 43-4 | 44.7 | 45.9 | 47.2 | 48.5 | 49.8 51.1 | 52.3 | 53.6 |1/0.1
622 || 65 | 54.9 | 56.2 | 57.5 | 58.7 | 60.0 | 61.3
623 || 65 | 67.7 | 69.0 | 70.3 | 71-5 | 72.8 | 74.1 | 75.4 | 76.7 | 77.9 | 79.2 | 3) 0.4,
624 || 65 | 80.5 | 81.8 | 83.0 | 84.3 | 85.6 | 86.8 | 88.1 | 89.4 | 90.7 | 91.9 | 4) 0.5

0.6
0.8
00.9 | 02.2 | 03.4 | 04.7 0.9
13.6 | 14.9 | 16.2 | 17.4 |8|1.0
26.3 | 27.6 | 28.9 | 30.1 |9/1.1
39.0 | 40.2 | 41.5 | 42.7
51.6 | 52.9 | 54.2 | 55.4
64.3 | 65.5 | 66.8 | 68.0
76.9 | 78.2 | 79.5 | 80.7
89.5 | 90.7 | 92.0 | 93.2

: 66
26 66 | 06.0 | 07.3 | 08.5 | 09.8 | 11.1 | 12.3
627 || 66 | 18.7 | 20.0 | 21.2 | 22.5 | 23.8 | 25.0
2
2

nat noe WwW

23 || gg | 31.4 | 32.7 | 33.9 | 36.2 | 56.4 | 37.7
29 || 6g | 44.0 | 45.3 | 46.5 | 47.8 | 49.1 | 50.3
630 || 66 | 56.7 | 58.0 | 59.2 | 60.5 | 61.7 }| 63.0
631 || 66 | 69.3 : 71.8 | 73.1 | 74.4 | 75.6

83.2 | 84.5 | 85.7 | 87.0 | 88.2
95.8 | 97.0 | 98.3 | 99.5

632 66 | 82.0
633 66 | 94.5
633 67

634 67 | 07.1

625 || 65 | 93.2 | 94.5 | 95.8 | 97.0 | 98.3 | 99.6
25
|

00.8
08.4 | 09.6 | 10.9 | 12.1 | 13.4
20:9 || 22.2 | 23.4 | 24.7 | 25.9
33.4 | 34.7 | 35.9 | 37.2 | 38.4
45.9 | 47.2 | 48.4 | 49.7 | 50.9

| 67 | 57.2 | 58.4 | 59.7 | 60.9 | 62.2 | 63.4
639 || 67 | 69.7 | 70.9 | 72.2 | 73.4 | 74.7 | 75.9

02.1 | 03.3 | 04.6 | 05.8
14.7 | 15.9) | 17.2 | 18.4
D720 2824) (29:7 || 30:9
39.7 | 40.9 | 42.2 | 43.4
52.2 | 53.4 | 54.7 | 59.9
64.7 | 65.9 | 67.2 | 68.4
77.1) | 78:4) 79.6.) 80.9
89.6 | 90.8 | 92.1 | 93.3

635 || 67 | 19.7

636 | 67 | 32.2
637 | 67 | 44.7

2
wy
ow

610 || 67 | 82.1 | 83.3 | 84.6 | 85.8 | 87.1 ] 88.3
641 || 67 | 94.6 | 95.8 | 97.1 | 98.3 | 99.6
641 || 68 02.0 | 03.3 | 04.5 | 05.8
642 || 68 | 07.0 14.4 | 15.7 | 16.9 | 18.2
643 || 68 | 19.4 26.8 | 28.0 | 29.2 | 30.5
39.1 | 40.4 | 41.6 | 42.9

51.5 | 52.7 | 53.9 | 55.2

00.8
08:2) 09:5 | 10.7 || 12.0 | 13.2
20.6 | 21.9 | 23.1 | 24.3 [ 25.5
32.9 | 34.2 | 35.4 | 36.7 | 37.9
45.3 | 46.6 | 47.8 | 49.0 } 50.2
57.6 | 58.9 | 60.1 | 61.3 | 62.5 | 63.8 | 65.0 | 66.2 | 67.5
69.9 | 71.2 | 72.4 | 73.6 |] 74.8 | 76.1 | 77.3 | 78.5 | 79.8

644 || 68 | 31.7
645 68 | 44.1
646 || 68 | 56.4
647 || 68 | 65.7

62.6 | 63.9 | 65.1 | 66.4 |2|0.2

| Birom- Parts

cr | N. | 0.0 | O.1 | 0.2 | 0.8 | 0.410.5 | 0.6 | 0.7 | 0.8 O.9 | for each}

| Hor h. : | 0.0lmm
ss L |

Db 23

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS,

648 to 689".

hese Parts
flereces N. | 0.0 | 0.1 | 0.2 | 0.3 | 0.4 ]0.5 | 0.6 | 0.7 | 0.8 | O.9 pice
' } a.
| Milli. || Metr.| Metres. | Metres. Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres, | Metres. Metr. |
| 648 || 68 | 81.0 | 82.2 | 83.5 | 84.7 | 85.9 | 87.1 | 88.4 | 89.6 | 90.8 | 92.1
| 649 || 68 | 93.3 | 94.5 | 95.8 | 97.0 | 98.2 | 99.4
| 649 || 69 00.7 | 01.9 | 03.1 | 04.4
650 || 69 | 05.6 | 06.8 | 08.0 | 09.3 | 10.5 | 11.7 | 12.9 | 14.1 | 15.4 | 16.6 |
| 451 || 69 | 17.8 | 19:0 | 20.2 | 21.5 | 22.7 | 23:9 | 25.1 | 26:3 | 27.6 |. 28.8 |
| 652 |) 69} 30:0") 31:2)| $254 4| S3i7 jL S4i9u S65) 37230) $8156 189-88! ALO
653 || 69 | 42.2 | 43.4 | 44.6 | 45.9 | 47.1 | 48.3 | 49.5 | 50.7 | 52.0 | 53.2
| 654 || 69 | 54.4 | 55.6 | 56.8 | 58.1 | 59.3 | 60.5 | 61.7 | 62.9 | 64.2 | 65.4
| 655 || 69 | 66.6 | 67.8 | 69.0 | 70.2 | 71.4 | 72.6 | 73.9 | 75.1 | 76.3 | 77.5
656 || 69 | 78.7 | 79.9 | 81.1 | 82.4 | 83.6 | 84.8 | 86.0 | 87.2 | 88.5 | 89.7
| 657 || 69 | 90.9 | 92.1 | 93.3 | 94.5 | 95.7 | 96.9 | 98.2 | 99.4
657 || 70 00.6 | 01.8
| 658 || 70 | 03.0 | 04.2 | 05.4 | 06.6 | 07.8 | 09.0 | 10.3 | 11.5 | 12.7 | 13.9
659 || 70 | 15.1 | 16.3 -| 17.5 | 18.7 | 19.9 | 21.1 | 22.4 | 23.6 | 24.8 | 26.0
660 || 70 | 27.2 | 28.4 | 29.6 | 30.8 | 32.0 | 33.2 | 34.4 | 35.6 | 36.8 | 38.0 | 1) 0.1
661 || 70 | 39.2 | 40.4 | 41.6 | 42.8 | 44.0 | 45.2 | 46.4 | 47.6 | 48.8 | 50.0 | 2/0.2
662 || 70 | 51.2 | 52.4 | 53.6 | 54.8 | 56.0 | 57.2 | 58.5 | 59.7 | 60.9 | 62.1 | 3/0.4
663 || 70 | 63.3 | 64.5 | 65.7 | 66.9 | 68.1 | 69.3 | 70.5 | 71.7 | 72.9 | 74.1 | 4/0.5
664 || 70 | 75.3 | 76.5 | 77.7 | 78.9 | 80.1 | 81.2 | 82.4 | 83.6 | 84.8 | 86.0 | 5/0.6
665 || 70 | 87.2 | 88.4 | 89.6 | 90.8 | 92.0 | 93.2 | 94.4 | 95.6 | 96.8 | 98.0 | 6/0.7
666 || 70 | 99.2 7/| 0.8
{ 666 || 71 00.4 | 01.6 | 02.8 | 04.0 | 05.2 | 06.4 | 07.6 | 08.8 | 10.0 | 8/ 1.0
i] 667-|| 71] 11.2>) 12:4>) 13/6 | 148 | 16.0.) 17.1 1-188 | 19.5 | 20:7 | 219) om
| 668 || 71 | 23.1 | 24.3 | 25.5 | 26.7 | 27.9 | 29.0 | 30.2 | 31.4 | 32.6 | 33.8
| 669 || 71 | 35.0 | 36.2 | 37.4 | 38.6 | 39.8 | 40.9 | 42.1 | 43.3 | 44.5 | 45.7
| 670 || 71 | 46.9 | 48.1 | 49.3 | 50.5 | 51.7 | 52.8 | 54.0 | 55.2 | 56.4 | 57.6
671 || 71 | 58.8 | 60.0 | 61.2 | 62.3 | 63.5 | 64.7 | 65.9 | 67.1 | 68.2 | 69.4
1 672. i 7S] 7016" || 7S | 730M (ZAI BLA 76loialee 77a) FSs9e| SOs SleS
i] 673 || 71 | 82.5 | 83.7 | 84.9 | 86.0 | 87.2 |] 88.4 | 89.6 | 90.8 | 91.9 | 93.1
il 674 || 71 | 94.3 | 95.5 | 96.7 | 97.8 | 99.0
f 674 || 72 00:2::| 01.4.\| 02.6 | 0327
675 || 72 | 06.1. 07.3 | 08.5 | 09.6 | 10.8 | 12.0 | 13.2 | 14.4 | 15.5
| 676 || 72 | 17.9 | 19.1 | 20.3 | 21.4 | 22.6 | 23.8 | 25.0 | 26.2 | 27.3
| 677 || 72 | 29.7 | 30.9 | 32.0 | 33.2 | 34.4 | 35.5 | 36.7 | 37.9 | 39.1
| 678 || 72 | 41.4 | 42.6 | 48.8 | 44.9 | 46.1 | 47.3 | 48.5 | 49.7 | 50.8
679 || 72 | 53.2 | 54.4 | 55.5 | 56.7 | 57.9 | 59.0 | 60.2 | 61.4 | 62.6
680 || 72 | 64.9 | 66.1 | 67.2 | 68.4 | 69.6 | 70.7 | 71.9 | 73.1 | 74.3
681 || 72 | 76.6 | 77.8 | 78.9 | 80.1 | 81.3 | 82.4 | 83.6 | 84.8 | 86.0
682 || 72 | 88.3 | 89.5 | 90.6 | 91.8 | 93.0 | 94.1 | 95.3 | 96.5 | 97.7
683 || 73 | 00.0 | 01.2 | 02.3 | 03.5 | 04.6 | 05.8 | 07.0 | 08.1 | 09.3
684 || 73 | 11.6 | 12.8 | 13.9 | 15.1 | 16.2 | 17.4 | 18.6 | 19.7 | 20.9
685 || 73 | 23.2 | 24.4 | 25.5 | 26:7 | 27.8 | 29:0 | 30:2 | 31:3 | 32.5
| 686 || 73 | 34.8 | 36.0 | 37:1 | 38.3 | 39.4 |-40.6 | 41.8 | 42.9 | 44.1
\| 687 || 73 | 46.4 | 47.6 | 48.7 | 49.9 | 51.0 | 52.2 | 53.4 | 54.5 | 55.7
| 688 || 73 | 58.0 | 59.2 | 60.3 | 61.5 | 62.6 | 63.8 | 65.0 | 66.1 | 67.3
} 689 || 73 | 69.6 | 70.7 | 71.9 | 73.0 | 74.2 | 75.3 | 76.5 | 77.6 | 78.8
eat N.| 0.0 | 0.1 | 0.2 | 0.3 0.4 | 0.5 0.6 | 0.7 | 0.8
or |
D 24

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS. 865

690 to 730"™,

aes eee eet kl. | ee, pal
eer ||. | 0.0 | 0.1 | 0.2 | 0.3 | 0.4] 0.5 | 0.6 | 0.7 | 0.8 | 0.9 [2&2

0.01mm. }|

I Milli. || Metr.| Metres. | Metres. | Metres. | Metres, | Metres. ] Metres. | Metres. | Metres. | Metres. | Metres, Metr.
690 73 | 81.1 82.3 83.4 84.6 85.7 | 86.9 88.1 89.2 90.4 91.5

691 | 73 | 92.7 | 93.8 | 95.0 | 96.1 | 97.3 | 98.4 | 99.6
691 | 74 00.7 | 01.9 | 03.0 |
692 74 | 04.2 | 05.3 | 06.5 | 07.6 | 08.8 | 09.9 | 11.1 } 12.2 | 13.4 | 14.5
693 74 | 15.7 | 16.8 | 18.0 | 19.1 | 20-3 | 21.4 | 22.6 | 23.7 | 24.9 | 26.0 |
694 74 | 27.2 | 28.3 | 29.5 | 30.6 | 31.8 | 32.9 | 34.1 | 35.2 | 36.4 | 37.5 |
695 || 74 | 38.7 | 39-8 | 41.0 | 42.1 | 43.3 | 44.4 | 45.5 | 46.7 | 47.8 | 49.0
696 74 | 50.1 | 51.2 | 52.4 | 53.5 | 54.7 | 55.8 | 56.9 | 58.1 | 59.2 | 60.4
| 697 74 | 61.5 | 62.6 | 63.8 | 64.9 | 66.1 | 67.2 | 68.3 | 69.5 | 70.6 | 71.8
698 74 | 72.9 | 74.0 | 75.2 | 76.3 | 77.5 | 78.6 | 79.7 | 80.9 | 82.0 | 83.2
699 74 | 84.3 | 85.4 | 86.6 | 87.7 | 88.9 | 90.0 | 91.1 | 92.3 | 93.4 | 94.6 |
| 700 74.| 95.7 | 96.8 | 98.0 | 99.1
700 || 75 00.3 | 01.4 | 02.5 | 03.7 | 04.8 | 06.0
701 Dy Ovel | O82) 09548) TOSS) MUG ea 2570) TSO eh T5308) NES 7.3
702 7) || 18:4) 19-5" |) 2007 |) 21°58) | 23:0) | 24-0 | 25.25.) 26545) 2725 |) 2827
703 75 | 29.8 | 30.9 | 32.1 | 33.2 | 34.3 | 35.4 | 36.6 | 37.7 | 38.8 | 40.0
| 704 75 | 41.1 | 42.2 | 43.4 | 44.5 | 45.6 | 46.7 | 47.9 | 49.0 | 50.1 | 51.3
| 705 75 | 52.4 | 53.5 | 54.7 | 55.8 | 56.9 | 58.0 | 59.2 |°60.3 | 61.4 | 62.6
706 To) b3-de|) 64:89) 66:00) 67-1) 1968-2) 1 69:3) | 7025) | 76) | 72270 )|| 73-9
107 \) 75) 75-0" |) 76.1 |) 77-2" | 78.4") 7955" 80:6" | 8127" | 82.8) | 84.0 || 85.1
708 75 | 86.2 | 87.3 | 88.5 | 89.6 | 90.7 | 91.8 | 93.0 | 94.1 | 95.2 | 96.4
709 45 | 97.5) || 98.6 | 9927
709 76 00.9 | 02.0 | 03.1 | 04.2 | 05.3 | 06.5 | 07.6
LOS eren| OS-ae) O9:8i|) L095 | 1250 TSe28 1 Wesel W524 W625) Ws 188
711 76.) 19:97) 21-07) 22:0) 23°37 | 24l4et 25.5) || 26:6) |) 27.27 7 |) 28:9" | 30:0
712 76 | 31.1 | 32.2 | 33.3 | 34-4 | 35.5 | 36.6 | 37.8 | 38.9 | 40.0 | 41.1 | 1)0.1
713 76 | 42.2 | 43.3 | 44.4 | 45.6 | 46.7 | 47.8 | 48-9 | 50.0 | 51.2 | 52.3 |2/0.2
714 76 | 53.4 | 54.5 | 55.6 | 56.8 | 57.9 | 59.0 | 60.1 | 61.2 | 62.4 | 63.5 |3/0.3 ||
715 76 | 64.6 | 65.7 | 66.8 | 67.9 | 69.0 | 70.1 | 71-3 | 72.4 | 73.5 | 74.6 | 4/0.4
716 76 | 75.7 | 76.8 | 77.9 | 79.0 | 80.1 | 81.2 | 82.4 | 83.5 | 84.6 | 85.7 | 5/0.5
717 76 | 86.8 | 87.9 | 89.0 | 90-1 | 91.2 | 92.3 | 93.5 | 94.6 | 95.7 | 96-8 | 6/0.7
718 76) 97.9 | 99:0 it | 0.8
718 77 00.1 | 01.2 | 02.3 | 03.4 | 04.6 | 05.7 | 06.8 | 07.9 |8/0.9 |

.
or

719 TMOG) \eLONe |e eTe2 i W223 os.4 15.7 | 16:8 | 17.9 | 19.0 |9'1-0 i
720 Ta | 20:1) 20°52" | 2253) | 23.4. | 24-5) | 25:6 | 26.7" | 27-8 | 28:9) | 30:0
721 77 | 31.1 | 32.2 | 33.3 | 34.4 | 35.5 | 36.6 | 37.7 | 38.8 | 39.9 | 41.0
722 77 | 42.1 | 43.2 | 44.3 | 45.4 | 46.5 | 47.6 | 48.7 | 19.8 | 50.9 | 52.0
723 77 | 53-1 | 54.2 | 55.3 | 56.4 | 57.5 | 58.6 | 59.8 | 60.9 | 62.0 | 63.1
724 77 | 64.2 | 65.3 | 66.4 | 67.5 | 68.6 | 69.6 | 70.7 | 71.8 | 72.9 | 74.0

725 || 77 | 75.1 | 76.2 | 77.3 | 78.4 | 79.5 | 80.6 | 81.7 | 82.8 | 83.9 | 85.0
726 || 77 | 86.1 | 87.2 | 88.3 | 89.4 | 90.5 | 91.6 | 92.7 | 93-8 | 94.9 | 96.0
727 | 77 | 97-1 | 98.2 | 99:3

727 || 73 | 00.4 | 01.5 | 02.5 | 03.6 | 04.7 | 05.8 | 06.9

728 || 78 08.0 | 09.1 | 10:2 | 11-3 | 12.4 1135 | 14.6 | 15.7 | 16.8 | 17.9
|| 729 | 78 | 19.0 | 20.1 | 21.2 | 22.3 | 23.4 | 24.4 | 25.5 | 26.6 | 27.7 | 28.8

730 || 73 | 29.9 | 31.0 | 32.1 | 33.3 | 34.3 | 35.3 | 36.4 | 37.5 | 38.6 | 39.7
eer a | 0.0 | 0.1 | 0.2 | 0.8 | 0.41 0.5 | 0.6 | 0.7 | 0.8 | 0.9 Jur cech
Horh.| | {ie | | {0 91mm.
ae | ea oe ale

366 BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS.

731 to 770".

eee eee es ———— —-— —— =,

| Barom- Parts | \
tet, || N. | 0.0 | 6.1 | 0.2 | 0.3 | 0.4] 0.5 | 0.6 | 0.7 | 0.8 | 0.9 |r ah)
Milli. | Metr. | Metres. | Metres. | Metres. | Metres. . | Metres. | Metres. | Metres, | Metres. Metr.
Wl 78 | 40.8 41.9 43.0 44.1 47.3 48.4 49.5 50.6
"732 W80| Olee | 52:87 53.93 54.9, 58.2 | 59.3 | 60.3 | 61.4
733 78 | 62.5 63.6 | 64.7 65.8 69.0 70.1 71.2 72.3 }
| 734 78 | 73.4 74.5 | 75.6 76.6 79.9 81.0 | 82.0 | 83.1
735 78 | 84.2 | 85.3 | 86.4 | 87.5 90.7 | 91.8 | 92.9 | 94.0 |
736 78 | 95.1 | 96.2 | 97.3 | 98.3
736 79 01.6 | 02.7 | 03.7 | 04.8
737 79 | 05.9 07.0 | 08.1 09.1 12.4 13.5 14.5 15.6
738 || 79 | 16.7 | 17.8 | 18.9 | 19.9 23.25) 24.30) 25:30 26e4 |
739 7 | 27.5 28.6 | 29.6 30.7 33.9 35.0 | 36.1 37a. '
| 740 79 | 38.2 | 39.3 40.4 41.4 44.7 45.8 46.8 47.9
7Al 79 | 49.0 | 50.1 51.1 52.2 55.4 56.5 57.6 | 58.6
| 742 79 | 59.7 | 60.8 61.8 62.9 66.1 67.2 | 68.3 | 69.3 "
'| 743 || 79 | 70.4 | 71.5 | 72.6 | 73.6 76.9 | 78.0 | 79.0 | 80.1 |
744 79 | 81.2 | 82.3 | 83.3 | 84.4 87.6 | 88.7 | 89.8 | 90.8
745 79 | 91.9 | 93.0 | 94.0 | 95.1 98.3 | 99.3
745 || 80 00.4 | 01.4
7416 80 | 02.5 | 03.6 | 04.6 | 05.7 08.9 | 10.0 | 11.1 | 12.3
WAG 80 | 13.2 14.3 15.3 16.4 19.6 20.6 ZU 2280
| 748 80 | 23.8 | 24.9 | 25.9 | 27.0 3020) SLe20 32230 33.3
749 80 | 34.4 | 35.5 | 36.5 | 37.6 40.8 | 41.9 | 43.0 | 44.0
750 80 | 45.1 46.2 47.3 48.4 51.6 52.6 53.7 | 54.7
751 80 | 55.7 56.8 57.8 58.9 62.1 63.1 64.2 | 65.2
752 80 | 66.3 67.4 68.4 69.5 aaa Fete (leet Wows
753 so | 76.9 78.0 79.0 80.1 83.3 84.3 | 85.4 | 86.4
754 || 80 | 87.5 | 88.5 | 89.6 | 90.6 93.8 | 94.8 | 95.9 | 96.9 |1,0.1
75D 80 | 98.0 | 99.1 2/0.2
755 || 81 00.1 | 01.2 04.4 | 05.4 | 06.5 | 07.5 |3/0.3
756 81 | 08.6 | 09.6 10.7 11.7 14.9 15.9 17.0 | 18.0 | 4/0.4
757 81 19.1 20.1 21.2 22.2 25.4 26.4 | 27.5 | 28.5 |510.5
758 81 | 29.6 | 30.6 | 31.7 | 32.7 35.9 | 36.9 | 38.0 | 39.0 | 610.6
759 81 40.1 41.1 42.2 43.2 46.4 47.4 | 48.5 | 49.5 | 710.7
8/0.8
760 81 50.6 | 51.6 | 52.7 53.7 56.9 57.9 59.0 | 60.0 |9/0.9
761 81 | 61.1 62.1 | 63.2 64.2 67.3 68.4 | 69.4 | 70.5
762 81 71.5 | 72.5'| 73.6 741.6 77.8 78.8 79.9 | 80.9
763 81 | 82.0 | 83.0 | 84.1 85.1 88.2 89.3 90.3 | 91.4
| 764 || 81 | 92.4 | 93.4 | 94.5 | 95.5 98.6 | 99.7
764 82 00.7 01.8
765 82 | 02.8 | 03.8 | 04.9 05.9 09.0 10.1 aa Wail 12.2
766 82 13.2 14.2 15.3 16.3 19.4 20.5 21.5 | 22.6
767 82 | 23.6 24.6 | 25.7 26.7 29.8 30.9 312944) 33:0
768 82 34.0 35.0 36.1 37.1 40.2 41.3 42.3 43.4
769 82 | 44.4 45.4 | 46.5 47.5 50.6 51.6 52.6 | 53.7
| 770 || 82 | 54.7 | 55.7 | 56.8 | 57.8 60.9 | 61.9 | 62.9 | 64.0 ;
\Barom-!/ | 0.0 | 0.1 | 0.2 | 0.3 0.6 | 0.7 | 0.8 | 0.9 jor crch
| Hor h. 0.01mm.

BAROMETRICAL MEASUREMENT OF HEIGHTS. ——- DELCROS. 367

wet sto SION:

0.9 for each

0.01mm.

0.0 | 0.1 | 0.2 | 0.3 | 0.4] 0.5 | 0.6 | 0.7 | 0.8

Metr.| Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres, | Metres. Metr.
65.0 | 66.0 | 67.1 68.1 69.2 | 70.2 71.2 72.3 73.3 TAA j
75.4 76.4 | 77.3 78.5 79.5 | 80.5 | 81.6 82.6 | 83.6 84.7
85.7 | 86.7 | 87.8 88.8 | 89.8 | 90.8 | 91.9 92.9 | 93.9 95.0
96.0 | 97.0 | 98.0 99.1

| Parts

— ee | —____

00.1 | 01.1 ; 02.1 | 03.1 | 04.2 | 05.2 |
06.2 | 07.2 | 08.3 | 09.3 | 10.3 | 11.3 | 12.4 | 13.4 | 14.4 | 15.5
16.5 | 17.5 | 18.5 | 19.6 | 20.6 | 21.6 | 22.6 | 23.6 | 24.7 | 25.7
26.7 | 27.7 | 28.8 | 29.8 | 30.8 | 31.8 | 32.9 | 33.9 | 34.9 | 36.0
37.0 | 38.0 | 39.0 | 40.1 | 41.1 }| 42.1 | 43.1 | 44.1 | 45.2 | 46.2
47.2 | 48.2 | 49.2 | 50.3 | 51.3 | 52.3 | 53.3 | 54.3 | 55.4 | 56.4

57.4 | 58.4 | 59.4 | 60.5 | 61.5 | 62.5 | 63.5 | 64.5 | 65.6 | 66.6
67.6 | 68.6 | 69.6 | 70.7 | 71.7 | 72.7 | 73.7 | 74.7 | 75.8 | 76.8
77.8 | 78.8 | 79.8 | 80.9 | 81.9 | 82.9 | 83.9 | 84.9 | 86.0 | 87.0
88.0 | 89.0 | 90.0 | 91.1 | 92.1 | 93.1 | 94.1 | 95.1 | 96.2 | 97.2
98.2 | 99.2

00.2 | 01.2 | 02.2 | 03.2 | 04.3 | 05.3 | 06.3 | 07.3
08.3 | 09.3 | 10.3 | 11.4 | 12.4 | 13.4 | 14.4 | 15.4 | 16.5 | 17.5
18.5 | 19.5 | 20.5 | 21.5 | 22.5 | 23.5 | 24.6 | 25.6 | 26.6 | 27.6
28.6 | 29.6 | 30.6 | 31.6 | 32.6 | 33.6 | 34.7 | 35.7 | 36.7 | 37.7
38.7 | 39.7 | 40.7 | 41.7 | 42.7 | 43.7 | 44.8 | 45.8 | 46.8 | 47.8
48.8 | 49.8 | 50.8 | 51.8 | 52.8 | 53.8 | 54.9 | 55.9 | 56.9 | 57.9

58.9 | 59.9 | 60.9 | 61.9 | 62.9 | 63.9 | 65.0 | 66.0 | 67.0 | 68.0

68.9 | 69.9 | 70.9 | 71.9 | 72.9 | 73.9 | 75.0 | 76.0 | 77.0 | 78.0 |1)0.1
79.0 | 80.0 | 81.0 | 82.0 | 83.0 | 84.0 | 85.0 | 86.0 | 87.0 | 88.0 |2/0.2
89.0 | 90.0 | 91.0 | 92.0 | 93.0 | 94.0 | 95.1 | 96.1 | 97.1 | 98.1 |3/0.3
99.1 5 4} 0.4
00.1 | 01.1 | 02.1 | 03.1 ] 04.1 | 05.1 | 06.1 | 07.1 | 08.1 |5|0.5
O9-1} WO: | W110" | 120) 13.0] 14:10) 15.10) 16.4 | 17.0 | 18-1 1610.6
19-8 3) 2021) 20-4 | OPA | SS Wot aN Fee | 26a) BTU QS.1. |7 10L7
Oe 0a) Stak i sai) | See s4ede | S5al. | S6ae | S704) 88.1 hs 08
39.1 | 40.1 | 41.1 | 42.1 | 48.1 | 44.1 | 45.1 | 46.1 | 47.1 | 48.1 |910.9|
49.1 | 50.1 | 51.1 | 52.0 | 53.0 | 54.1 | 55.0 | 56.0 | 57.0 | 58.0
59.0 | 60.0 | 61.0 | 62.0 | 63.0 | 64.0 | 65.0 | 66.0 | 67.0 | 68.0
| 69.0 | 70.0 | 70.9 | 71.9 | 72.9 | 73.9 | 74.9 | 75.9 | 76.9 | 77.9
78.9 | 79.9 | 80.9 | 81.9 | 82.9 | 83.9 | 84.9 | 85.8 | 86.8 | 87.8 |
88.8 | 89.8 | 90.8 | 91.8 | 92.8 | 93.8 | 94.8 | 95.8 | 96.7 | 97.7 |
| 98.7 | 99.7
00.7 | 01.7 | 02.7 | 03.7 | 04.7 | 05.7 | 06.6 | 07.6
| 08.6 | 09.6 | 10.6 | 11.6 | 12.6 | 13.6 | 14.6 | 15.5 | 16.5 | 17.5
18.5 | 19.5 | 20.5 | 21.5 | 22.5 | 23.4 | 24.4 | 25.4 | 26.4 | 27.4
| 28.4 | 29.4 | 30.4 | 31.3 | 32.3 | 33.3 | 34.3 | 35.3 | 36.3 | 37.3
38.3 | 39.2 | 40.2 | 41.2 | 42.2 | 43.2 | 44.2 | 45.1 | 46.1 | 47.1
48.1 | 49.1 | 50.1 | 51.1 | 52.0 | 53.0 | 54.0 | 55.0 | 56.0 | 57.0 |
57.9 | 58.9 9 | 60.9 .9 | 62.8 | 63.8 | 64.8 | 65.8 | 66.8 i
Parts |
0.0 | O.1 0.3 0.5 | 0.6 | 0.7 | 0.8 | 0.9 for eacn|
.ULmm.

368 BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROs.

TABLE II. Correction ror DirFERENCE OF TEMPERATURE OF ATTACHED THERMOMETERS.

Upper = T'
Lower = T.

Temperature of Barometers at Station {

Correct. || T! —T Correct. T —T Correct. T’—T Correct. T—T Geos
ig. | Metres. ||Centigrade.| Metres. ||Centigrade.} Metres. || Centigrade.| Metres. ||Centigrade. Nei:
0.0 0.0 8.0 10.3 16.0 20.6 24.0 30.9 32.0 41.3
0.2 0.3 8.2 10.6 16.2 20.9 24.2 31.2 32.2 41.5
0.4 0.5 8.4 10.8 16.4 21.1 24.4 31.5 32.4 41.8
0.6 0.8 8.6 11.1 16.6 21.4 24.6 31.7 32.6 42.0
| 0.8 1.0 8.8 11.3 16.8 2 24.8 32.0 32.8 42.3
1.0 1.3 9.0 11.6 17.0 21.9 25.0 32.2 33.0 42.5
1.2 1.5 9.2 11.9 17.2 22.2 25.2 32.5 33.2 42.8
1.4 1.8 9.4 12.1 17.4 22.4 25.4 32.7 33.4 43.1
1.6 2.1 9.6 12.4 17.6 22.7 25.6 33.0 33.6 43.3
1.8 2.3 9.8 12.6 17.8 22.9 25.8 33.3 33.8 43.6
2.0 2.6 10.0 12:9 18.0 23.2 26.0 33.5 34.0 43.8
2.2 2.8 10.2 13.1 18.2 23.9 26.2 33.8 34.2 44.1
2.4 3.1 10.4 13.4 18.4 23.7 26.4 34.0 34.4 44.3
2.6 3.4 10.6 13.7 18.6 24.0 26.6 34.3 34.6 44.6
2.8 3.6 10.8 13.9 18.8 24.2 26.8 34.6 34.8 44.9
3.0 3.9 11.0 14.2 19.0 24.5 27.0 34.8 35.0 45.1
3.2 4.1 11.2 14.5 19.2 24.8 Dikea 35.1 35.2 45.4
3.4 4.4 11.4 14.7 19.4 25.0 27.4 35.3 35.4 45.6
| 3.6 4.6 11.6 15.0 19.6 25.3 27.6 35.6 35.6 45.9
3.8 4.9 11.8 15.2 19.8 25.5 27.8 35.8 35.8 46.2
40 5.2 12.0 15.5 20.0 25.8 28.0 36.1 36.0 46.4
4.2 5.4 12.2 15.8 20.2 26.0 28.2 36.4 36.2 46.7
AA Deidl 12.4 16.0 20.4 26.3 28.4 36.6 36.4 46.9
4.6 5.9 12.6 16.3 |: 20.6 26.6 28.6 36.9 36.6 47.2
4.8 6.2 12.8 16-5 |. (20.8 26.8 28.8 37.1 36.8 47.4
5.0 6.4 13.0 16.8 21.0 27-1 29.0 37.4 37.0 47.7
5.2 6.7 13.2 17.0 21.2 27.3 29.2 37.6 37.2 48.0
5.4 7.0 13.4 17.3 21.4 27.6 29.4 37.9 37.4 48.2
5.6 V2 13.6 17.5 21.6 27.8 29.6 38.2 37.6 48.5
58 eo) 13:83 MeS ll eoliess 28.1 29.8 38.4 37.8 48.7
6.0 hed: 14.0 18:04. 4||) 422-0 28.4 30.0 38.7 38.0 49.0
6.2 8.0 14.2 1835 | 72262 28.6 30.2 38.9 38.2 49.2
6.4 8.3 14.4 18.5 || 22.4 28.9 30.4 39.2 38.4 49.5
6.6 8.5 14.6 18.8 || 22.6 29.1 30.6 39.5 38.6 49.8
6.8 8.8 14.8 19:0, |, 22:8 29.4 30.8 39.7 38.8 50.0
7-0 |) 9.0. ||, 15-0) 9 419.3 23.0 | 29.7 31.0 | 40.0 39.0 | 50.3
[end 9.3 15.2 19.6 23.2 29.9 31.2 40.2 39.2 50.5
| 7.4 | 9.5 15.4 19 8 23.4 30.2 31.4 40.5 39.4 50.8
eac0! 9.8 15.6 | 20.1 23.6 30.4 31.6 40.7 39.6 lei:
| 7.8 10.1 15.8 20.3 23.8 30.7 31.8 41.0 39.8 51.3
| 8.0 10.3 | 16.0 20.6 24.0 30.9 32.0 41.3 40.0 516
ft

This Table supposes the scale to be of brass from the top to the cistern, If it
were of glass or of wood, the argument 'T’ — T ought to be diminished at the ratio
of 54 to 62.

In computing by the formula of Laplace, we begin by reducing the barometers to

3 ey
the same temperature by means of the following formula: H = h’ + h’ ( aaa)
Table II. saves this trouble, and gives, in metres, the correction due to the differ-
ence of temperature of the barometers.

D 28

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS. 369

TABLE III. Correction ror DECREASE OF GRAVITATION IN LATITUDE.

| 6 = (0.0028371 cosin.2L). (A+a-+ 68).

The Argument is the Mean Latitude between the two Stations,

LATITUDE, Correction, in metres, for 4

Correction.

Added. |Subtr’et|| 1000|2000|3000| 4000 | 5000 | 6000

o
90 2.8 5.7 8.5 11.3 14.2 17.0

0
! 1 89 2.8 5.7 8.5 11.3 14.2 17.0
2 88 2.8 5.7 8.5 11.3 14.1 17.0
3 87 2.8 5.6 8.5 11.3 14.1 16.9
4 86 2.8 5.6 8.4 11.2 14.0 16.9
5 85 2.8 5.6 8.4 11.2 14.0 16.8
6 84 2.8 5.5 8.3 11.1 13.9 16.6
u 83 207 5.5 8.2 11.0 13.8 16.5
8 82 2.0 5.4 8.2 10.9 13.6 16.4
9 81 2.7 5.4 8.1 10.8 13.5 16.2
10 80 2.7 5.3 8.0 10.7 13.3 16.0
11 79 2.6 5.2 tic) 10.5 13.1 15.8
12 78 2.6 5.2 7.8 10.4 13-0 15.5
13 T7 2.5 5.1 7.6 10.2 12.7 15.3
14 76 2.5 5.0 7.0 10.0 12.5 15.0
15 75 2.5 4.9 74 9.8 12.3 14.7
16 74 2.4 4.8 7.2 9.6 12.0 14.4
17 73 2.4 4.7 7.0 9.4 11.8 14.1
18 72 2.3 4.6 6.9 9.2 11.5 13.8
19 71 2.2 4.5 6.7 8.9 11.2 13.4
20 70 2.2 4.3 6.5 8.7 10.9 13.0
21 69 2.1 4.2 6.3 8.4 10.5 12.6
22 68 2.0 4.1 6.1 8.2 10.2 12.2
23 67 2.0 3.9 5.9 71.9 9.8 11.8
24 66 1.9 3.8 5.7 7.6 9.5 11.4
25 65 1.8 3.6 5.5 7.3 9.1 10.9
26 64 1.7 3.5 5.2 7.0 8.7 10.5
27 63 1.7 3.3 5.0 6.7 8.3 10.0
28 62 1.6 3.2 4.8 6.3 7.9 9.5
29 61 1.5 3.0 4.5 6.0 7.5 9.0
30 60 1.4 2.8 4.3 5.7 7.1 8.5
31 59 oO 2.7 4.0 5.3 6.6 8.0
32 58 1-2 2.5 3.7 5.0 6.2 7.5
33 57 1.1 2.3 3.5 4.6 5.8 6.9
34 56 1.1 2.1 3.2 4.2 5.3 6.4
35 55 1.0 1.9 2.9 3.9 4.8 5.8
36 54 0.9 1.7 2.6 3.5 4.4 5.3
37 53 0.8 1.6 2.3 3.1 3.9 4.7
| 38 52 0.7 1.4 2.1 2.7 3.4 4.1
39 51 0.6 1.2 1.8 2.4 2.9 3.5
40 50 0.5 1.0 1.5 2.0 2.5 3.0
41 49 0.4 0-8 1.2 1.6 2.0 2.4
42 48 0.3 0.6 0.9 1.2 1.5 1.8
43 47 0.2 0.4 0.6 0.8 1.0 1.2
44 46 0.1 0.2 0.3 0.4 0.5 0.6

~
On
_
oO

0.0 0.0 0.0 0.0 0.0 0.0

370

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DELCROS:

TABLE IV. CorrecTION FOR DECREASE OF GRAVITATION ON 4 VERTICAL LINE.

ga (Att +d) XA (+0484)

Argument = (A+ 4+ 6+ 0),

Difference
of Level.

Metres.
100
200

300

400

500

600
700
800
900
1000

1100
1200
1300
1400
1500

1600
1700
1800
1900
2000

Metres. Metres. Metres. Metres. Metres.
0.2 2100 6.0 4100 12.9
0.5 2200 6.3 4200 13.3
0.8 2300 6.6 4300 13.7
1.0 2400 6.9 4400 14.1
1.3 2500 7.3 4500 14.5

1.6 2600 7.6 4600 14.9
1.8 2700 7.9 4700 15.3

2800 8.3 4800 15.7
2.4 2900 8.6 4900 16.1
2.7 3000 8.9 5000 16.5

2.9 3100 9.3 5100 16.9
3.2 3200 9.6 5200 17.3

3300 10.0 5300 17.7
3.8 3400 10.3 5400 18.1
4.1 3500 10.7 5500 18.5

4.4 3600 11.1 5600 19.0
gf 3700 11.4 5700 19.4
5.0 3800 11.8 5800 19.8
5.3 3900 12.2 5900 20.3

5.6 4000 12.5 6000 20.7

TABLE V. CorRECTION FOR THE ELEVATION OF THE LOWER

Argument = Height of Barometer at Lower Station.

Approximate
Difference
of Level.

Metres.
1000

2000
3000
4000
5000

6000
7000
8000
9000

400 600

Metres, Metres.
oa : : : 0.6
3.4 ° . . 1.3
5.1 S ne 5 1.9
6.8 : . 2.5
8.5 5 ° . 3.1
10.3 : ; 3.8
12.0 Z c ° 4.4
13.7 . ° 5.0
15.4 . 5.7

Approximate | Correspond. || Approximate | Correspond. || Approximate | Correspond.
Correction Difference Correction Difference Correction
Positive. of Level. Positive. of Level. Positive.

STATION ABOVE

Height of Barometer at Lower Station in Millimetres.

650

Metres.

0.4
0.8
1.3
1.7
2.1

2.5
2.9
3.4
3.8

Approximate
Difference
of Level.

Metres.
6100
6200
6300
6400
6500

6600
6700
6800
6900
7000

7100
7200
7300
7400
7500

7600
7700
7800
7900
8000

700

Metres.

0.2
0.4
0.7
0.9
1.1

1.3
1.5
1.8
2.0

21.1
21.6
22.0
22.5
22.9

23.4
23.9
24.3
24.8
25.3

25.7
26.2
26.7
27.2
27.7

28.1
28.6
29.1
29.6
30.1

Correspond.
Correction
Positive.

Metres.

OcEAN.

a

oF ee ee a

371

PE:

TABLES

FOR COMPUTING DIFFERENCES OF ELEVATION FROM BAROMETRICAL OBSERVATIONS.

BY A. GUYOT.

Tastes which, like the preceding ones by Delcros, in metrical measures, are
sufficiently extensive to save the necessity of interpolations, relieve the computer of
most of his trouble, and considerably reduce the chances of error in the computa-
tions. ‘They thus render to science itself a real service, by inducing observers to
determine a larger number of points, and to secure the accuracy of the results by
repeating their observations at the same point in various atmospheric circumstances,
both of which they can do without fear of being overwhelmed by the labor of
the computation.

Similar tables are here offered to the observers who use instruments graduated to
English measures. Like those of Delcros, the new tables are based on Laplace’s
formula, with a slight modification of only one constant. They dispense with the
use of logarithms, and give the differences of level corresponding to every thou-
sandth of an inch from 12 to 31 inches by means of the simplest arithmetical opera-
tions, so that the data being prepared and corrected, the computation of an elevation
takes but a few minutes, and is done with scarcely any chance of error.

Laplace’s formula and constants were adopted for the computation of the tables in
preference to others found in the following sets for reasons which a few words will
explain.

It has been remarked, page 9, that, in consequence of Laplace’s constants having
been retained in Gauss’s, Schmidt’s, and Baily’s formule, they all give similar re-
sults ; but that Bessel’s formula differs in separating the correction due to the moist-
ure of the air from that due to its temperature, while in Laplace’s, and in the for-
mulz just mentioned, both are united. ‘To introduce a separate correction for the
expansion of aqueous vapor is, in the writer’s view, a doubtful improvement. The
laws of the distribution and transmission of moisture through the atmosphere are too
little known, and its amount, especially in mountain regions, is too variable, and
depends too much upon local winds and local condensation, to allow a reasonable
hope of obtaining the mean humidity of the layer of air between the two stations
by means of hygrometrical observations taken at each of them. These doubts are
confirmed by the experience of the author and of many other observers, which shows
that, on an average, Laplace’s method works not only as well as the other, but
more uniformly well. At any rate, the gain, if there is any, is not clear enough to
compensate for the undesirable complication of the formula.

Though the several co-efficients of Laplace’s formula need perhaps to be modified
according to more recent and probably more accurate determinations of the physical
constants on which they depend, as has been proposed by Plantamour, E. Ritter, and
lately by the writer himself in a paper read before the American Association for the
Advancement of Science at their meeting in Montreal, they have been retained in
preparing the following tables, partly because it was found that the errors due to

D ol

372 BAROMETRICAL MEASUREMENT OF HEIGHTS.

the various co-efficients nearly compensate each other; partly on the ground that,
until a severe test, by means of actual comparative measurements made for the
purpose, has shown the expediency of these modifications, it seemed desirable to
adhere to the old constants, and thus to preserve a uniformity in the results with the
tables: of Oltmans, Delcros, Gauss, Baily, and others, which have already been
extensively used. ‘The substitution of the co-efficient 0.00260, expressing, accord-
ing to Schmidt’s computation (Mathem. und Physic. Geogr., Il. p. 202), the variation
of gravity in latitude, for the value 0.002837, does not sensibly alter the altitudes
obtained.

The close agreement of the determinations furnished by Laplace’s formula, in
barometrical measurements carefully conducted, made in favorable circumstances,
and during the warm season, with those obtained from repeated trigonometrical
observations, or by the spirit-level, strongly testifies in favor of its general correct-
ness. A few striking examples will suffice to show it.

The altitude of Mont Blanc, measured by the barometer, by MM. Bravais and
Martins, on the 29th of August, 1844, and computed by Delcros, by means of nine
corresponding stations situated on all sides of the mountain (see Annuaire Météoro-
logique de France, for 1851, p. 274), was found to be 4810 metres. The altitude of
the same point, being the mean of seven of the most elaborate and reliable geodetic
measurements, which cost nearly twenty years of labor, is 4809.6 metres.

For smaller elevations the formula seems to answer equally well.

The barometrical measurement of Mount Washington, in New Hampshire, by the
author, on the 8th and 9th of August, 1851, gave, by Delcros’s Tables, for the mean
of eight observations, taken at different hours of the day, 5466.7 English feet above
Gorham, N. H., 6285.7 above high tide, and 6291.7 feet above the mean level of the
ocean in Portland harbor. In August, 1852, W. A. Goodwin, Civil Engineer, start-
ing from Gorham Railroad Station, found, by the spirit-level, Mount Washington to
be 6285.5 feet above mean tide. In September, 1853, Captain T. J. Cram, of the
Topographical Engineers, executed, in behalf of the Coast Survey, a careful measure-
ment with the spirit-level, on the same line, for the purpose of testing the various
methods of measuring altitudes, and found Mount Washington to be 6293 English
feet above the mean level of the ocean.

In lower latitudes the formula showed equally good results. By a barometrical
measurement in July, 1856, the altitude of the highest peak of the Black Mountain,
North Carolina, about Lat. 86°, was found by the author to be 6701 English feet;
and that of the highest Mountain House 5248 feet. In September, 1857, Major
T. C. Turner, Chief Engineer of the Morganton Railroad, ran a line of levels from
the same point which was used as the lower station for the barometrical measurement,
to the top of the highest peak, and found its altitude to be 6711 English feet, and
that of the Mountain House 5246 feet. Other points on the line agreed equally well.

Such an agreement, in so considerable elevations, is all that can be desired.

These figures show conclusively, that, when the errors which may arise from the
great variability of the data furnished by the instruments have been removed by a
repetition, in various states of the atmosphere, and by a proper combination of simul-
taneous observations at stations not too distant from each other, those which remain
and may be attributed to the formula cannot be considerable. But, on the other

D 32

BAROMETRICAL MEASUREMENT OF HEIGHTS. 373

hand, we have no right to expect such results from single observations, taken, per-
haps, in unsettled weather, without paying any regard to the time of the day at
which they were made, to the distance or the non-simultaneity of the corresponding
observations, or to other unfavorable circumstances. It is too well known that in
such cases large errors may and do actually occur ; but for these the formula ought
not to be held responsible.

ARRANGEMENT OF THE TABLES.

If we call
h = the observed height of the barometer
r == the temperature of the barometer at the lower station ;
+ == the temperature of the air
h’ = the observed height of the barometer
r' = the temperature of the barometer at the upper station.
t' = the temperature of the air
If we make, further,
Z = the difference of level between the two barometers ;
I, = the mean latitude between the two stations ;

H = the height of the barometer at the upper station reduced to the tem-
perature of the barometer at the lower station ; or,

H= Wh’ $1 + 0.00008967 (7 — 1’)? ;

The expansion of the mercurial column, measured by a brass scale, for
1° Fahrenheit = 0.00008967 ;

The increase of gravity from the equator to the poles = 0.00520048, or
0.00260 to the 45th degree of latitude ;

The earth’s mean radius = 20,886,860 English feet ;

Then, Laplace’s formula, reduced to English- measures, reads as follows :

h A
Z— log ii X 60158.6 English feet (1 + 0.00260 cos 2 L).
( pp 2+ 52282 h )
L a 20886860 10443430/°

Table I. gives, in English feet, the value of log H or h x 60158.6 for every
hundredth of an inch, from 12 to 31 inches in the barometer, together with the value
of the additional thousandths, in aseparate column. ‘These values have been dimin-
ished by a constant, which does not alter the difference required.

Table II. gives the correction 2.343 feet x (r— 1’) for the difference of the tem-
peratures of the barometers at the two stations, or + — 1’. As the temperature at
the upper station is generally lower, r — r’ is usually positive, and the correction
negative. It becomes positive when the temperature of the upper barometer is higher,
and + —7! negative. When the heights of the barometers have been reduced to the
same temperature, or to the freezing point, this table will not be used.
z+ 52252
20886860
altitude for the decrease of gravity on a vertical acting on the density of the

Table IV. shows the correction D’ to be applied to the approximate

mercurial column. It is always additive.

D 39

374 BAROMETRICAL MEASUREMENT OF HEIGHTS.

h :
TORRES for the decrease of gravity on
a vertical acting on the density of the air; the height of the barometer h at the
lower station representing its approximate altitude. Like the preceding correction, it

Table V. furnishes the small correction

is always additive.

Use or THE TABLEs.

In Table I. find first the numbers corresponding to the observed heights of the
barometer A and h’. Suppose, for instance, h = 29.345 in.; find in the first column on
the left the number 29.3; on the same horizontal line, in the column headed .64, is
given the number corresponding to 29.34 = 28121.7; in the last column but one on
the right, we find for .005 = 4.5, or for 29.345 = 28126.2. Take likewise the
value of h’, and find the difference.

If the barometrical heights have not been previously reduced to the same tem-
perature, or to the freezing point, apply to the difference the correction found in
Table IL. opposite the number representing r — 7’ ; we thus obtain the approximate
difference of level, D.

For computing the correction due to the expansion of the air according to its
t+ t' — 64
900
that sum 64; multiply the rest into the approximate difference D, and divide the
product by 900. This correction is of the same sign as (¢ + ¢/ — 64). By apply-

ing it, we obtain a second approximate difference of level, D’.

In Table III., with D/ and the mean latitude of the stations, find the correction for
variation of gravity in latitude, and add it to D’, paying due attention to the sign.

In Table IV. with D’, and in Table V. with D’ and the height of the barometer at
the lower station, take the corrections for the decrease of gravity on a vertical, and

temperature, or D x ( ), make the sum of the temperatures, subtract from

add them to the approximate difference of level.

The sum thus found is the true difference of level between the two stations, or Z ;
by adding the elevation of the lower station above the level of the sea, when known,
we obtain the altitude of the upper station.

The use of the small table, VI., by means of which approximate differences of
level can be obtained by a single multiplication, is explained below, page 90.

Example 1.

Measurement of Mount Washington, New Hampshire, by A. Guyot, August 8th,
1851, 4 p.m.; the barometer at the lower station being at 825 English feet above
the mean level of the sea; at the upper station at one foot below the summit.

The observation gave,

Barometer. Attached Thermometer. Temperature of Air.
Gorham, h = 292720: eo 10 7Onne i 2 Vark
Mount Washington, h’ = 24.030 “ 7 = 54° 152 FE. t' = 50°.54 F-
r—r = 16°.38 F. 129259).

— 64

t+ t' — 64 = 58°.59 F.
D 3

afar»
ors

BAROMETRICAL MEASUREMENT OF HEIGHTS. 375

5
Table I. gives for h = 29.272 inches, . : . 28,061.00
ee Gor torn = 24:/030s5 5 ; : ; 22,905.60
Difference, ‘ . 96,155.40
Table II. gives for r — r’ = 16°.38_ . ; , — 37.64

Approximate difference of level, D = 5,117.76
Du(b + ta Coen 118 x7 58.6

900 900 a ae

Second approximate difference, D’ = 5,450.95

Table III. gives for D’ = 5450 and Lat. 44°. : 0.50

Table IV. gives for D’ = 5450 . : ; : 14.94

Table V. gives forh = 29.27 : : : : 0.00

Barometer below summit, . : — 1.00

Mount Washington above Gorham, or. 22D oO

Barometer at Gorham above sea level ‘ : 825.00
Mount Washington above the sea, or altitude, . : 6,290.39 Eng. ft.

Example 2.

Measurement of the highest peak of the Black Mountain, in North Carolina, July
11th, 1856, by A. Guyot.

By observation we have at,

Barometer. Attached Thermometer. Temperature of Air.
Mountain House, h = 24.934in. +r = 64°.58 F. t =; 617.34 FE:
Highest Peak, he =" 23602" r= 61° 884. bt ==. 597.300 E.
r—ri= 2°.70 F. 120°.70 F.
— 64°
t+ t’ — 64 = 56°.7 F.
Table I. gives for h = 24.934 . : ; : . 23,870.4
oS “fort! == 23.662 2 j : ‘ 22,502.4
Difference, . : 3 . 1,368.0
Table Il. gives for r — 7’ = 2.7 . : : : — 6.3
Approximate difference, D = 1,361.7
DX @4-t — 64) 1862 % 56.7
900 Be 900 ey i ae
Second approximate difference, D’ — 1,447.5
Table III. gives for D’ = 1448 and Lat. 36°. ; 1.2
Table IV. gives for D’ = 1448 _. : : ; 3.8
Table V. gives for D’ = 1448 and h = 25 ‘ ‘ 0.7
Highest peak above Mountain House, or . a 1,453.2
Mountain House above the sea : t ; : 5,248.4

Black Mountain, highest peak above the sea, or altitude, 6,701.6 Eng. ft.
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TABLE

FOR

FOMPUTING THE DIFFERENCE IN THE HEIGHTS OF TWO PLACES BY MEANS OF
THE BAROMETER,

By Pror. Extas Loomis.

Tuts table was computed from the formula of Laplace, modified in accordance
with the results of more recent determinations.
Suppose that we have observed

H, the height of the barometer,

At the lower station. T, the temperature of the barometer,
t, the temperature of the air,
h’, she height of the barometer,

At the upper station. | T’, the temperature of the barometer,
t’, the temperature of the air.

Represent by s the height of the lower station above the level of the sea, by L the
la..tude of the place, and by h the observed height h’ reduced to the temperature T.
The difference of level x between the two stations is given by the formula,

(ips)
% = 60158. 6 ft. x log. ? x { (1 + 0.00265 cos. 2 L)

x + 52251 Ss
L (1 + “nissse9 + ==

But h represents the height h’ reduced from the temperature T’ to the temperature
T. The expansion of mercury for 1° Fahr. is 0.0001000 ; that of the brass which
forms the scale of the barometer is 0.0000104 ; the difference is 0.0000896. Hence
we have h = h’ $1 + 0.0000896 (T — T’)}.

Therefore,

60158. 6 ft. log. # = 60158.6 ft. log. ¥ — 2.3409 ft. (T — T’).

Part I. of the accompanying Table furnishes in English feet the value of the ex:
pression 60158.6 log. H for heights of the barometer from 11 to 31 inches ; only
they have all been diminished by the constant 27541.5 feet which does ‘ot change
the. difference

60158.6 log. H — 60158.6 log. h.

Part II. furnishes the correction — 2.3409 (T — T’) depending upon the differ-
ence 'T — T’ of the temperatures of the barometers at the two stations. This cor-

D 47

"oO
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wD

TABLE FOR COMPUTING THE DIFFERENCE IN THE HEIGHTS

rection is generally negative. It would be positive if T— T’ were negative ; that is
if the temperature T’ of the barometer at the upper station exceeded the temperature
T at the lower station.

Part III. gives the correction A x 0.00265 cos. 2 L, to be applied to the approx-
imate altitude A, and which arises from the variation of gravity from the latitude of
45 degrees, to the latitude L of the place of observation. ‘This correction has the
same sign as cos. 2 L; that is, it is positive from the equator to 45 degrees, and neg-
ative from 45 degrees to the pole.

A + 52251

Ee which is always to be added to the ap-

Part IV. gives the correction A x

proximate height A, and which is due to the diminution of gravity on the vertical.

Part V. furnishes for the approximate difference of level A the small correction
A X yum Corresponding to several values of the height s of the lower station. But

in place of s there has been substituted as the argument of the table, the height H of
the barometer at this station.

Method of Computation.

Take from Part I. the two numbers corresponding to the observed barometric
heights H and A’. From their difference subtract the correction 2.3409 (T — T';
found in Part II. with the difference T — T’ of the thermometers attached to the ba-

rometers. We thus obtain an approximate altitude a.
t+r—64
900
tiplying the nine-hundredth part of a by the sum of the temperatures ¢ and 7’ dimin-
ished by 64. This correction is of the same sign as t + ¢/ — 64. We thus obtain

a second approximate altitude A.
With A and the latitude of the place L, we seek in Part III. the correction A x
0.00265 cos. 2 L arising from the variation of gravity with the latitude.

For the approximate height A, Part IV. gives the correction A x —— arising

We then calculate the correction a for the temperature of the air, by mul-

from the diminution of gravity on a vertical. This correction is always additive.
Finally, when the height s of the lower station is considerable, the small correc-

tion A x Wit may be found in Part V. This correction is always additive.

Example 1.

M. Humboldt made the following observations on the mountain of Guanaxuato, in
Mexico, in Latitude 21°, viz.

Upper station. Lower station near the sea.
Thermometer in open air, lt’ = 70°.3 t= Tics
Thermometer to barometer, T’ = 70°.3 ieee
Barometer, h! = 23.66 H = 30.046

Required the difference in the height of the two stations.
D 48

eee

ly

3 a

OF TWO PLACES BY MEANS OF THE BAROMETER. 8389

Part L gj for H = 30.046 inches 27649.7

ane SINS | for h = 23.66 inches 21 406.9

Difference 6242.8

Part II. gives for T — T’ = 7°.2, —16.9

Approximate altitude a, 6225.9

au (t + t' — 64) = 6.918 x 83.8, +-579.7

Second approximate altitude A, 6805.6

Part III. gives for A = 6806, and L = 21°, +13.3

Part IV. gives for 6806, +19.3
Height above the sea, 6888.2 feet,

Example 2.

M. Gay Lussac in his celebrated balloon ascent in 1805, found his barometer to
indicate 12.945 English inches, the temperature being 14°.9 Fahrenheit. The ba-
rometer at Paris at the same time indicated 30.145 English inches with a tempera-
ture of 87°.44 Fahrenheit. Required the elevation of the balloon above Paris.

cies for H = 30.145 inches, 27735.6

v8 for kh’ = 12.945 inches, 5650.4

Difference, 22085.2

Part II. gives for T — T’ = 72°.54, —169.9

Approximate altitude a, 21915.3

soa (¢ + t! — 64) = 24.35 x 38.34, +933.6

Second approximate altitude A, 22848.9

Part III. gives for A = 22848, and L = 48° 50° —8.2

Part IV. gives for 22848, +82.1
Height of balloon above Paris, 22922.8 feet.

mo

Inches.

11.0
lid
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
12.0
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
13.0
13.1
13.2
13.3
13.4
13.5
15.6
13.7
13.8
13.9
14.0
14.1
14.2
14.3
14.4
14.5

14.8
14.9
15.0
15.1
15.2
15.3
15.4
15.5
15.6
15.7
15.8
15.9

Feet.

1396.9
1633.3
1867.6
2099.9
2330.1
2558.3
2784.5
3008.7
3231.1
3451.6
3670.2
3887.0
4102.0
5315.3
4526.9
4736.7
4944.9
5151.4
5356.4
5559.7
5761.4
5961.6
6160.3
6357.5
6553.2
6747.5
6940.3
7131.7
7321.7
7510.5
7697.6
7883.6
8068.2
8251.5
8433.6
8614.4
8794.0
8972.3
9149.5
9325.5
9500.3
9673.8
9846.2
10017.5
10187.7
10356.8
10524.8
10691.8
10857.7
11022.5

16.0 | 11186.3

!
14.6
14.7
|

BAROMETRICAL MEASUREMENT OF HEIGHTS. — LOOMIS.

Argument, the observed Height of the Barometer at either Station,

Diff.

236.4
234.3
232-3
230.2
228.2
226.2
224.2
222.4
220.5
218.6
216.8
215.0
213.3
211.6
209.8
208.2
206.5
205.0
203.3
201.7
200.2
198.7
197.2
195.7
194.3
192.8
191.4
190.0
188.6
187.3
186.0
184.6
183.3
182.1
180.8
179.6
178.3
177.2
176.0
174.8
173.5
172.4
171.3
170.2
169.1
168.0
167.0
165.9
164.8
163.8

Inches.

16.0
16.1
16.2
16.3
16.4
16.5
16.6
16.7
16.8
16.9
17.0
17.1
17.2
17.3
17.4
17.5
17.6
17.7
17.8
17.9
18.0
18.1
18.2
18.3
18.4
18.5
18.6
18.7
18.8
18.9
19.0
19.1
19.2
19.3
19.4
19.5
19.6
19.7
19.8
19.9
20.0
20.1
20.2
20.3
20.4
20.5
20.6
20.7
20.8
20.9
21.0

Feet.

11186.3
11349.1
11510.9
11671.7
11831.5
11990.3
12148.2
12305.1
12461.0
12616.1
12770.2
12923.5
13075.8
13227.3
13377.9
13527.6
13676.5
13824.5
13971.7
14118.0
14263.6
14408.3
14552.3
14695.4
14837.8
14979-4
15120.3
15260.3
15399.7
15538-3
15676-2
15813-3
15949.8
16085-5
16220.5
16354.8
16488-5
16621-4
16753-7
16885-3
17016-3
17146-6
17276-3
17405-3
17533-7
17661-4
17788-6
17915-1
18041-0
18166.3
18291.0

1

Diff.

162.8
161.8
160.8
159.8
158.8
157.9
156.9
155.9
155.1
154.1
153.3
152.3
151.5
150.6
149.7
148.9
148.0
147.2
146.3
145.6
144.7
144.0
143.1
142.4
141.6
140.9
140.0
139.4
138.6
137.9
137.1
136.5
135.7
135.0
134.3
133.7
132.9
132.3
131.6
131.0
130.3
129.7
129.0
128.4
127.7
127.2
126.5
125.9
125.3
124.7

Inches.

21.0
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.9
22.0
22.1
22.2
22.3
22.4
22.5
22.6
22.7
22.8
22.9
23.0
23.1
23.2
23.3
23.4
23.5
23.6
23.7
23.8
23.9
24.0
24.1
24.2
24.3
24.4
24.5
24.6
24.7
24.8
24.9
25.0
25.1
25.2
Pa3
25.4
25.5
25.6
25.7
25.8
25.9
26.0

Feet.

18291.0

18415.1
18538.7
18661.6
18784.0
18905.8
19027.0
19147.7
19267.8
19387.4
19506.4
19624.9
19742.9
19860.3
19977.2
20093.6
20209.4
20324.8
20439.6
20554.0
20667.8
20781.1
20894.0
21006.4
21118.3
21229.7
21540.6
21451.1
21561.1
21670.6
21779.7
21888.4
21996.6
22104.3
22211.6
22318.4
22424.8
22530.8
22636.4
22741.5
22846.3
22950.6
23054.4
23157.9
23261.0
23363.6
23465.9
23567.7
23669.2
23770.3
23871.0

104.8
104.3

103.8 |

103.5
103.1
102.6
102.3
101.8
101.5
101.1
100.7

Inches.

26.0
26.1
26.2
26.3
26.4
26.5
26.6
26.7
26.8
26.9
27.0
27.1
27.2
27.3
27.4
27.5
27.6
27.7
27.8
27.9
28.0
28.1
28.2
28.3
28.4
28.5
28.6
28.7
28.8
28.9
29.0
29.1
29.2
29.3
29.4
29.5
29.6
29.7
29.8

4 29.9

30.0
30.1
30.2
30.3
30.4
30.5
30.6
30.7
30.8
30.9
31.0

Feet.

23871.0
23971.3
24071.2
24170.7
21269.8
24368.6
24467.0
24565.1
24662.7
24760.0
24857.0
24953.6
25049.8
25145.7
25241.2
25336.4
25431.2
25525.7
25619.9
25713.7
25807.1
25900.3
25993.1
26085.6
26177.7
26269.6
26361.1
26452.3
26543.2
26633.7
26724.0
26813.9
26903.5
26992.8
27081.9
27170.6
27259.0
27347.1
27434.9
27522.5
27609.7
27696.6
27783.3
27869.7
27955.7
28041.5
28127.1
28212.3
28297.3
28382.0
28466.4

PART IL i

|

Diff.

100.3
99.9
99.5
99.1
98.8
98.4
98.1
97.6
97.3
97.0
96.6
96.2
95.9
95.5 ||
95.2 ||
94.8

94.5

94.2

93.8

93.4

93.2

92.8

92.5

92.1

91.9

91.5

91.2 ||
90.9 |;
90.5 |}
90.3
89.9
89.6
89.3
89.1
88.7
88.4
88.1
87.8
87.6
87.2
86.9
86.7 |
86.4 ||
8f.9
85.8
85.6
85.2 |
85.0

84.7
84.4

—

ia

BAROMETRICAL MEASUREMENT OF HEIGHTS. — LOOMIS. 391

PARI i: =|
Correction due to T —T', or the Difference of the Temperatures of the Barometers at the two Stations.
This Correction is Negative when the Temperature at the Upper Station is lowest, and vice vers t. |
| Oo in| Coe br. | Coe oe, | Coe [rw | Coe Ya, | Obese
Fah’t. Feet. Fah’t. Feet. Fah’t. | Feet. | Fah’t. Feet. Fah’t. Feet. Fah’t. Feet. !
° ° ° ° ° °
1 2.3 14 32.8 27 63.2 40 93.6 53 124.1 66 154.5
2 4.7 15 35.1 28 65.5 Al 96.0 54 126.4 67 156.8
3 7.0 16 37.5 29 67.9 42 98.3 55 128.7 68 159.2
4 9.4 17 39.8 30 70.2 43 100.7 56 131.1 69 161.5
5 TI erf 18 42.1 31 72.6 44 103.0 57 133.4 70 163.9
6 14.0 19 44.5 32 74.9 45 105.3 58 135.5 71 166.2
7 16.4 20 46.8 33 77.3 46 107.7 59 138.1 72 168.6
8 18.7 21 49.2 34 79.6 A7 110.0 60 140.4 73 170.9
9 21.1 22 51.5 35 81.9 48 112.4 61 142.8 74 173.3
10 23.4 23 53.8 36 84.3 49 114.7 62 145.1 75 175.6
11 25.8 24 56.2 37 86.6 50 117.0 63 147.5 76 io,
12 28.1 25 58.5 38 89.0 51 119.4 64 149.8 77 180.3
13 30.4 26 60.9 39 91.3 52 121.7 65 152.2 78 182.6
l|
PART Ut:
Correction due to the Change of Grav- oe PART V.
Latitude of the Place of Observation, || Correction|| Correction due to the Height of the Lower
Positive from Lat. 0° to 450 ; tyros craton: :
Negative from Lat. 45° to 900. of Gravity Always Positive.
Latitude. ona 2 s
0° | 100] 200] 300] 400 Vertical. Height of Barometer at Lower Station.
App. |—— 450 Always Tana App’
Alt. 90° | 809 | 70° | 600 | 500 Positive. || 16 in.|18 in.| 20 in.) 22 in.| 24 in.|}26 in.|28 in.} Alt.
Feet. | Feet.| Feet.| Feet.| Feet.| Feet.) Feet Feet. Feet.| Feet.| Feet.| Feet.) Feet.| Feet.|Feet.| Feet.
1000} 2.6] 2.5) 2.0} 1.3] 0.5) 0 2.5 1.6) 1.5) 1.0) 0.8} 0.6; 0.4) 0.2] 1000
2000] 5.3} 5.0} 4.1] 2.6) 0.9) 0 5.2 3.1/ 2.5) 2.0) 1.5) 1.1] 0.7] 0.3} 2000
3000] 7.9} 7.5} 6.1] 4.0] 1.4] 0 79 4.7) 3.8} 3.0) 2.3) 1.7] 1.1] 0.5] 3000
4000} 10.6} 10.0} 8.1) 5.3) 1.8) 0 10.8 6.3| 5.1) 4.0} 3.1) 2.2} 1.4] 0.7] 4000
5000] 13.2] 12.4) 10.1] 6.6] 2.3) 0 13.7 7.8| 6.4) 5.0) 3.8} 2.8) 1.8] 0.8] 5000
6000} 15.9} 14.9] 12.2} 7.9] 2.8) 0 16.7 9.4] 7.6) 6.0} 4.6] 3.3] 2.1) 1.0] 6000,
7000} 18.5] 17.4) 14.2} 9.3] 3.2) 0 19.9 TONS <9 ed Ete Se9e 2.55) 12 7000!
8000} 21.2] 19.9| 16.2} 10.6} 3.7) 0 23.1 12.5| 10.2) 8.1) 6.2] 4.4] 2.8] 1.3 8000)
9000 | 23.8) 22.4] 18.3) 11.9] 4.1) 0 26.4 14.1/ 11.4] 9.1} 6.9) 5.0) 3.2] 1.5] 9000
10000 | 26.5] 24.9| 20.3] 13.2] 4.6] 0 29.8 15.7| 12.7; 10.1) 7.7) 5.5) 3.5] 1.7110000
11000 | 29.1) 27.4) 22.3) 14.6] 5.1) 0 33.3 17.2] 14.0) 11.1} 8.5] 6.1] 3.9] 1.8111000),
12000] 31.8] 29.9/ 24.4) 15.9) 5.5] 0 36.9 18.8} 15.8) 12.1} 9.2) 6.6) 4.2] 2.0112900)|
13000 | 34.4) 32.4) 26.4/ 17.2} 6.0} 0 40.6 20.4] 16.5| 13.1] 10.0] 7.2] 4.6] 2.2113000)!
14000 | 37.1} 34.9] 28.4/ 18.5] 6.4) 0 44.4 21.9] 17.8) 14.1) 10.8) 7.7) 4.9] 2.3114000
15000 | 39.7) 37.3) 30.4) 19.9} 6.9) 0 48.3 23.5) 19.1) 15.1) 11.5} 8.3] 5.3] 2.5115000
16000} 42.4 39.8] 32.5] 21.2) 7.4) 0 52.3 25.1| 20.3) 16.1) 12.3] 8.8) 5.6] 2.7 i6000!|
70001 45.0) 42.3) 34.5) 22.5] 7.8] 0 56.4 26.6/ 21.6) 17.1) 13.1) 9.4) 6.0] 2.8]17000
18000 | 47.7) 44.8] 36.5) 23.8) 8.3) 0 60.5 28.2} 22.9| 18.1] 13.8) 9.9) 6.3] 3.0;18000
19000] 50.3) 47.3 38.6) 25.2| 8.7) O 64.8 29.8) 24.1) 19.2| 14.6] 10.5) 6.7 | 3.2]19000};
20000] 53.0); 49.8) 40.6 26.5] 9.2) 0 69.2 31.3| 25.4) 20.2) 15.4) 11.0; 7.0} 3.3} 20000
21000 | 55.6! 52.3 42.6 27.81) 9.7) 0 73.6 $2.9] 26.7] 21.2] 16.1] 11.6] 7.4 | 3.5]21000))
22000 | 58.3] 54.8 44.7 29.1) 10.1] 0 78.2 34.5) 28.0) 22.2} 16.9 12.1) 7.7 | 3.7]22000
23000] 60.9] 57.3| 16.7 30.5| 10.6| 0 82.9 36.0} 29.2) 23.2] 17.7| 12.7; 8.1 | 3.8] 23000)|
24000 | 63.6) 59.8 48.7, 31.8] 11.0} 0 87.6 37.6! 30.5) 24.2| 18.5] 13.2) 8.4] 4.01241000
25000 | 66.2! 62.2| 50.7: 33.1| 11.5) 0 92.5 39.1] 31.8] 25.2! 19.2 13.8| 8.8! 4.1 25000]
D ol

392

[V3

TABLES

FOR REDUCING BAROMETRICAL OBSERVATIONS TO THE LEVEL OF THE SEA, OR TO ANY
OTHER LEVEL, AND FOR COMPUTING DIFFERENCES OF ELEVATION MEASURED BY THE
BAROMETER, BY M. C. DIPPE.

Tue following tables, published by M. C. Dipre, in the Astronomische Nachrichten,
No. 1056, November, 1856, are a modification and extension of Gauss’s tables,
published in Schumacher’s Jahrbuch, for 1836 and the following years, which are
based on the formula of Laplace. In this new form they answer a double purpose.
They give the means of solving a problem which often occurs in Meteorology, viz. :
The difference of elevation between two stations, and the temperature of the air at
both, being known, to reduce the height of the barometer at one of the stations to the
height it would have at the other. ‘They are likewise adapted to the computation of
heights from barometrical observations.

The formula of Laplace, which has been used, the Metres being reduced to Toises,
and the Centigrade degrees to degrees of Reaumur, reads as follows :

h = 9407.73 (i + iho ) (1 4+. a cos2¢) (i+*) { log 5 + 2log (1 +7) be

Where t and ¢’ = the temperatures of the air, in degrees of Reaumur, at the lower
and upper station,
6 and b’ = the height of the barometer, in any scale, reduced to the freezing

point, at the lower and upper station,
h = the difference of level, in toises, between the two stations,
r = the distance, in toises, of the lower station to the centre of the

Earth,
¢ = the latitude of the place of observation,
a = the increase of gravity from the equator to the poles.

Making, besides, m = the modulus of the common logarithms, the formula be-
comes, with sufficient accuracy,
1 ie 2m) 1 i
0 F AE TE al mies : Sapa we
( 9407.73 re r $ “1+ acos2¢ eee
Assuming r, or the radius of the Earth, at 45° latitude = 3266631 toises, and
a = 0.002595, instead of 0.002845 adopted in Gauss’s tables, and making

log b—log ' =h

u = log b— log DU’,

1 i 1 2m
oe og See Sree eg | Perera east

0 RS Nokona igs BEES Nay
¢ = — ma cos 2,

mh
c = — —

r?

then the reduction of the height of the barometer to another level is given by the
formula,

D d2

BAROMETRICAL MEASUREMENT OF HEIGHTS. 393

l. logu=loghta+c+c;
2. log b = log b' + u.

Table I. contains the values of a for the argument ¢-+ ¢’; 10 units are to be sub-
tracted from the characteristic.

Table II. gives the values of ¢ for the argument q¢, or the correction for the
change of gravity in latitude, which is negative from 0° to 45°, positive from 45°
to 90°.

Table III. furnishes the values of c’ for the argument h in toises, or the correction
for the decrease of gravity on the vertical. Both in Tables II. and III. the values of
c and c’ are given in units of the fifth decimal place.

The difference of elevation of the two stations is given by the formula,

1, u = log b — log U’"
2. logh=logu+A+c4+ce,

in which A is the arithmetical complement of a, and the corrections c and c’ receive
contrary signs. For the sake of convenience, the values of A have been placed in
Table I., and in Table III. the correction for A is found in another column, with the
more convenient argument v = log u-+ A.
If the heights of the barometers have not been reduced to the freezing point, then,
B and B’ being the unreduced heights of the barometers, and T and T’ the temper-
ature of the attached thermometer in degrees of Reaumur,
B B’
6:4 =——y :——y,
1+ 4419 1 auto
: m
and making 4440 = &
u = log b — log b' = (log B— BT) — (log B‘ — BT’).
Instead of 8 = 0.000098, we can write with sufficient accuracy 0.00010.

Use oF THE TABLEs.

These tables can be used in any latitude, and for any barometrical scale ; but the
indications of the barometers must be reduced to the freezing point ; and the tem-
peratures of the air must be given in degrees of Reaumur. The tables suppose the
use of logarithms with 5 decimals, such as those of Lalande, and give the results
in toises.

1. For Reducing Barometrical Observations to another Level.

Given h in toises, ¢, ¢’, @, and b or B’.
To find 6 or Bb’.
In Table I. with the argument ¢ + ?#’, take a,
In Table II. with the argument @, take ec,
In Table III. with the argument h, take c’,

the last two corrections being given in units of the fifth decimal, making
log h-+a-+c-+c’— 10 (whole units) = log wu.
Then we have
for a level lower by h toises, log 6 = log b' + u;
for a level higher by h toises, log b’ = log b — u.

If h, or the difference of elevation, is given in metres, take c’, which is always
negative, from Table III. (for A) with the argument v = log h + 9.71, and write
log u = 9.71018 + log h + a+ c + c! — 10 (whole units).

Then again is log 6 = log b/ + u.
D 53

394 BAROMETRICAL MEASUREMENT OF HEIGHTS. |

Evample 1.

Suppose the height of the barometer, reduced to the freezing point, to be }/ =

295.39 Paris lines; the temperature of the air ¢/ = 11°.8 Reaumur, and the latitude
g = 51° 48’; the increase of heat downwards being 1° Reaumur for 100 toises.

What is the height of the barometer, reduced to the freezing point, at a station
lower by h = 498.2 toises ?

In th’ case t = ¢' + 4°.98 = 16°.78, and ¢ + ¢’ = 28°.58.

Then
log thi 2.69740
Table I. for 28°.58 gives a= 5:99538
Table I. for 51° 48’ gives c = + 0.00026
Table IIL. for 498 toises gives c’ = — 0.00007
losgit—— 8.69297 — 10
i 0.04931
log 6) == 2.47040
log b = 251971
Barometer at the lower station 6 = 330.90 Paris lines.

Example 2

Suppose the reduced barometer }/ = 598.6 millimetres ; the temperature of the
air t’ = 18°.0 Centigrade = 14°.4 Reaumur; the difference of elevation h = 2217
metres, @ = 3°. The temperature of the air at the lower station ¢ = 27°.5 Cen-
tigrade = 22°.0 Reaumur, and ¢ + ¢/ = 36°.4 Reaumur.

los 2217. 3.94577
Then log h = ; 3 af 9.71018
3.05595) v ="3106
= 5.98750
Cn ——0,001N2
¢ = — 0.00015
log, & == 9.04218 — 10
— 0.11020
losio— 9.77714
log b 9. 88734

II Il

Barometer at the lower eaten b 771.5 millimetres.

2. For Computing Differences of Elevation from Barometrical Observations.

Given the unreduced height of the barometer at the lower and upper station,
B and B’; the temperatures of the attached thermometers, T and ‘T’; the temperatures
of the air, ¢.and ¢’; and the latitude, ¢.

To find h, or the difference of elevation between the two stations.

Subtract (log B’ — 10 T’) from (log B — 10 T), paying due attention to the
nature of the signs of T and T’, and taking the numbers 10 'T and 10 'T’ as units of
the fifth decimal. Calling then (log B — 10 T) — (log B’ — 10 T’) = u, or if the
heights of the Barometers are reduced to the freezing point, log pee log Oia
t ike,

In Table I., A with the argument ¢ + t', and make v = log u + A.

In Table II., with the argument @¢, take ¢ reversing the sign.

D o4

BAROMETRICAL MEASUREMENT OF HEIGHTS. 395

In Table III., for A, with the argument v, take c’, which, in this case, is always
positive ; then, remembering that the values of ¢ and c’ are given in units of the
fifth decimal, we have,

vote+ec' = log h in toises,
v+ec+tc’ + 0.28982 = log h in metres,
v+c-+ c’ + 0.80584 = log h in English feet.

Example 1.

L. station B = 329.013 Paris lines; TF = +15.88R. ; t=+ 15.96R. ; o= 45 32.
U. station B’ = 268.215 Paris lines ; T’=-+ 8.40R.; t=-+ 7.92R.

ttr#= 23.88R.

log B = 2.51722 — 10 x 15.88 = 2.51563
log Bi = 2.42848 —10 x 84 = 2.42764
u— 0.08799
low’ == 8 94443
A= 399982
== | | 2294495
c = — 0.00002
Gosg ty COO
logh = 2.94435

= 879.74 toises.

Example 2.

L. station B = 763.15 millimetres; T = ¢ = 25.3 Cent. = 20.24 R. . Oo 21,
U. station B‘ = 600.95 millimetres; T’ = # = 21.3 Cent. = 17.04 R.

t+ t! = 37.28 R.
log B = 9.88261 — 10 x 20.24 = _— 9.88059

log B’ = 9.77884 — 10 x 17.04 = 9.77714
— 0.10345
loc 1 9:01473
A= 4.01337
v= 3.02810
c = + 0.00084
eh = 0.00014
log h = 3.02908 for toises.
0.28982
logikr== 3.31890 for metres.
log h = 3.02908 for toises.
0.80584
log h = — 3.83492 for English feet.

h = 1069.3 toises == 2084.0 metres = 6837.9 English feet.

896 BAROMETRICAL MEASUREMENT OF HEIGHTS. — DIPPE.

I. Argument: Sum or THE TEMPERATURES OF THE AIR IN DEGREES OF REAUMUR.

= — —— -— =
Correction for Correction for
t+7 zs t+?
| Reaumur. a Difference. A Reaumur. a Difference. | A
—60° | 6.09617 3.90383 —20° | 6.01776 as 3.95224
—59 6.091489 a 3.90511 -19 6.04661 a 3.95339
—58 6.09362 ae 3.90638 —18 6.04547 Es 3.95453
eT 6.09235 as 3.90765 7 6.04434 = 3.95566
—56 6.09108 ae 3.90092 —16 6.014320 a 3.95680
—55 6.08982 - 3.91018 —15 6.01207 as 3.95793
—54 6.08856 a 3.91144 —l4 6.04094 a 3.95906
—53 6.08730 as 3.91270 —13 6.03981 a 3.96019
—52 6.03605 5 3.91395 —12 6.03569 ae 3.96131
| 51 6.08480 i 3.91520 -11 6.03757 “at 3.96213 |!
} |
—50 6.08356 Ae 3.91644 —10 6.03645 a 3.96355
| —19 6.05231 ae 3.91769 -— 9 6.03533 a 3.96467
—18 6.03108 oh 3.91892 —8 6.03422 i 3.96578
—47 6.07984 a 3.92016 — 7 6.03311 ae 3.96689
—16 6.07861 _ 3.92139 — 6 6.03201 ie 3.96799
45 6.97738 Hie 3.92262 — 5 6.03090 ve 3.96910
—44 6.07616 — 3.92384 — 4 ] 6.02980 a 3.97020
—13 6.07494 ie 3.92506 -— 3 6.02871 ‘ad 3.97129
—12 6.07372 oa 3.92628 —2 6.02761 ne 3.97239
—41 6.07250 a 3.92750 || -—1 6.02652 a 3.97348
—40 6.07129 ms 3.92871 0 6.02543 ae 3.97457
=30 6.07009 Be 3.92991 +1 6.02434 se 3.97566
—38 6.06588 44 3.93112 2 6.02326 oe 3.97674
—37 6.06768 se 3.93232 3 6.02217 a 3.97783
—36 6.06648 on 3.93352 | 4 6.02109 oa 3.97891
=o 6.06529 aa 3.93471 5 6.02002 ae 3.97998
—34 6.06410 Pee 3.93590 6 6.01895 ee 3.98105
—33 6.06291 at 3.93709 7 6.01787 ate 3.98213
—32 6.06173 ue 3.93827 8 6.01680 ee 3 98220
=a 6.05055 ie 3.93945 9 6.01574 ~ 3.98426
—30 6.05937 ae 3.91063 10 6.01468 i 3.98532
—29 6.05819 i 3.94181 | 11 6.01362 i 3.98638
—28 6.05702 es 3.91298 | 12 6.01256 | oe 3.98744
—27 6.05585 si 3.94415 13 6.01150 au 3.98850
—26 6.05469 ae 3.94531 14 6.01045 a 3.98955
—25 6.05352 7 3.94648 15 6.00940 i 3.99060
—24 6.05236 a 3.94764 16 6.00835 te 3.99165
| —23 6.05121 oe 3.94879 | 17 6.00731 A 3.99269
—-22 6.05005 x 3.94995 18 6.00626 a 3.99374
—21 6.01890 e 3.95110 19 6.00522 ae 3.99178
| —20 6.01776 3.95224 +20 6.00418 3.99582
1

D 56

BAROMETRICAL MEASUREMENT OF
( Continued.)

HEIGHTS. — DIPPE.

Correction for Correction for
te tf
Reaumur. a Difference. A Reaumur. a Difference. A
+20° 6.00418 sa 3.99582 +40° 5.98393 mi 4.01607
21 6.00315 “We 3-99685 41 5.98294 an 4.01706
22 6.00212 aoe 3.99788 42 5.98195 oe 4.01805
23 6.00108 an 3.99892 43 5.98097 ae 4.01903
24 6.00006 3.99994 At 5.97998 4.02002
103 98
25 5.99903 Aon 4.00097 45 5.97900 K 4.02100
26 5.99801 he 4.00199 46 5.97803 os 4.02197
ae 5.99699 ae 4.00301 47 5.97705 ET 4.02295
28 5.99597 ae 4.00403 48 5.97608 “5 4.02392
29 5.99495 a 4.00505 49 5.97511 e 4.02489
30 5.99394 vit 4.00606 50 5.97414 a7 4.02586
3l 5.99293 " 4.00707 51 5.973817 oP 4.02683 |
32 5.99192 a 4.00808 52 5.97221 ae 4.02779
33 5.99091 a 4.00909 53 5.97124 OG 4.02876
34 5.98991 aa 4.01009 54 5.97028 és 4.02972
35 5.98890 0 4.01110 55 5.96933 Me 4.03067
36 5.98790 oe 4.01210 56 5.96837 ag 4.03163
37 5.98691 aa 4.01309 57 5.96742 dé 4.03258
38 5.98591 aif 4.01409 58 5.966416 ae 4.03354
39 5.98492 4.01508 59 5.96551 4.03449
TR RANT eee ha reiaeicad eaisoe cs Ill. Decreaszt oF GRAVITY ON THE
s q : VERTICAL. — CORRECTION
= 7 at
p c o|o> | c o E | € lg h G h GC v eo}
Oo | fe) Oo ° ° °
0 113+! 90 § 15 -—98+ | 75 | 30 |-56+) 60 100 1 1600 | Dil 1.8 ]
1 113 | 89 } 16 96 741i} 31 SS oo 200 3 1700 | 23 1.9 1
2 een ToS te Ly 93 Ga 4 d2)| 49) | 58 300 4 1800 | 24 2.0 es
3 112 | 87; 18 91 F2) | oe| 46, || oY 400 5 1900 25 P45) Dea
4] 112 | 86] 19 89 71 | 384 | 42 | 56 500 a 2000 27 ies 2
2.3 3
5 111 85 | 20 86 Toss | 39 | 55 600 8 2100 28 Deck Sil
6 110 | 84 7 21 84 69 | 36 | 35 | 54 700 9 2200 | 29 2.5 4
vil 109 | 83 } 22 81 68 |.37 | 31 53 800 Il 2300 | 31 2.6 5
8 | 108 | 82 | 23 78 CWSS alae 4) o2 900 12 2400 | eed a
9 | 107 | Sl | 24 75 66 | 39 | 23 | 51 1000 13 2500 33 2.8 8
2.9 11
10 | 106 | 80 | 25 72 65 | 40 | 20 | 50 1100 | 15 2600 ae) ae 13
11 104 | 79 | 26 69 64] 41 16 | 49 1200 16 2700 36 oe 17
2 103 | 78 | 27 66 63 | 42 12 | 48 1300 17 2800 3 Se Pai
13 | OU 77 128) | 63 62 | 43 8 | 47 1400 19 2900 39 3.3 27
14 | 100 | 76] 29; 60 | 61] 44 4 | 46 1500 | 20} 3000) 40 3:4 33
8355) 42
15 | —98+| 75 | 30 —56+)| 60 | 45 | —O+ 45 1600 21 3500 | 47 3.6 53
D ot

398

Vi.
TABLES

FOR REDUCING BAROMETRICAL OBSERVATIONS TO ANOTHER LEVEL, AND FOR COMPUTING
" DIFFERENCES OF ELEVATION MEASURED BY THE BAROMETER, BY M. C. DIPPE.

In No. 1088 of the Astronomische Nachrichten, published in June, 1857, Dr.
Dirre gives the following set of Tables for reducing barometrical observations to
another level, and for computing heights. These tables, being based, as the preced-
ing ones (IV.), on the formula of Laplace, and computed with the same constants,
give results nearly identical, but dispense with the use of logarithms.

Use oF THE TABLEs.

The tables suppose the height of the barometer to be expressed in French inches
or Paris lines, and the temperature in degrees of Reaumur; they give the differ-
ences of level in French toises.

The signs used have the following signification : —

B = Observed Height of Barometer in Paris lines.
At Lower T = Attached Thermometer in degrees of Reaumur.
Station. 6 = Barometer reduced to the freezing point.

t == Temperature of the air, detached Thermometer.

ie = Observed Height of Barometer.
)

At Upper T’ = Attached Thermometer.
Station. b' = Barometer at the freezing point.
| ¢ = Temperature of the air.
go = Latitude of the place.
h = Difference of elevation between the two stations.

I. For Reducing Barometrical Observations to another Level.

Given, h in toises, ¢, t’, p, and 3 or b’.
To find 8 or 0’.

Make first 2 7 = Ts and +, and

D 0d

BAROMETRICAL MEASUREMENT OF HEIGHTS. 399

In Table [., with the argument 27, take 7’, 2
In Table IIL, with the arguments / and 7, take C;
In Table IV., with the arguments A and @, take C’;

Make, further,
ns / BE
u=h+C+C and 559 7 ;
And if b' be given, and 6 required,
In Table II., with the argument J, take II ;

U

then is Eley (a, apr )s

and the height of the barometer, in Table IL., due to H, is d required.
If b be given, and 6’ required for a level higher by h toises, then,

In Table II., with the argument 0, take H’.
Make, further,
(ete pana ic Mee ey
ao (u Tao? )

and b’ is the height of the barometer in Table II., corresponding to H’.

Example 1.

Suppose the height of the barometer reduced to the freezing point to be b/ =
295.39 Paris lines ; the temperature of the air ¢/ = 11°.8 Reaumur; and the latitude
g = 51°.48 ; the increase of heat downwards being 1° Reaumur for 100 toises.
What is the height of the barometer reduced to the freezing point, at a station lower
by h = 498.2 toises ?

In this case, oo STS. Sib 11.8) 4098 5 6 ta 28) 08);
2 a = Ae T= ge Leah:

and according to Table I. 7 = -+ 6.67.
With h and 7, in Table III., we find C= — 1.4

With h and @g, in Table IV., we find C’ = + 0.3
Weaddh= 498.2

uU

and we haveu—= 497.1 ; TOOT Me na
u Tht of
—— 100 oslo ae
ae Bd
463.95 Rtas a,
With 3’, in Table II., we find H’ = 367.86 a

FH sais!

Finally, with H, in Table II., we find 6 = 330.91 Paris lines, which is the required
height of the barometer at the lower station. Gauss’s tables (IV.) would give 6 =
330.90 lines.

D . 59,

400 BAROMETRICAL MEASUREMENT OF HEIGHTS. ‘
A
Example 2. :
Suppose J/ = 330.46 Paris lines ; ¢’ = — 12°.3 Reaumur; h’ = 92.7 toises;
oi 62%.
In this case, assuming t = @’,
Dope ee Sy tae |
and according to Table I. 7’ = — 6.55.

With hf and +, in Table III., take C= — 0.2
With hand g, in Table IV., take C’ = + 0.1

Add h = Oe.
Wehaveu= 92.6 7 i aa
U +4! —=— 6.55
nar G00 7 i——-, 6.07 ae
oe Son ah
With b’, in Table II., take H’ = 826.22 10°
H= 924.89

With H, in Table IL, we find 6 = 338.53 Paris lines. Gauss’s tables (IV.) wou'd
give b = 338.54 lines.

Il. For Computing Differences of Elevation from Barometrical Observations.
Suppose to be given B, B’, T, T’, ¢, ¢’, p; required h.
Make first r = itt and T — T’.

Then in Table II., with the argument 1 Bi take Bh

and make

a Seen
u=(H—H)+—),-+—(T—T),

in which each full degree of 'T — T’ corresponds to a toise.
Further, in Table IIL, with uw and +, take C reversing the sign ;
in Table IV., with wand @, take C’ reversing the sign ;
in Table V., with T — T’ and +, take C’ with the signs of T — T’.
Then the difference of elevation required is
h=u+c+eC4C"”.
If the heights of the barometer, reduced to the freezing point, or b and 0’, are given,

: b take H
then in Table IL, with the argument, ; b/ take HY’,

and make
(ape ee
Further, in Table IIJ., take C reversing the sign ;
in Table IV., take C’ reversing the sign ;
and

h=utorc.
D 60

BAROMETRICAL MEASUREMENT OF HEIGIITS, 401

Example 1. —

Suppose to’ be given,
B = 333.6 Paris lines; T = + 17°.0 Reaumur; ¢ = -+ 19°.0R.; 6 = 48°
B’ = 289.9 Paris lines; T’ = + 16°.3 Reaumur; t/ = + 15°.2 R.
ae Oy, t+ t= + 34°.2
r=-+ 8.55
In Table II. with B take H = 864.9
& with B’ take H’ = 291.2

H — H! = 573.7 S088
Hi Khe HW’ T= a
= 100 Tt 49.06 285
— ae — T ) = —0.7 aes Se
u = 622.06
In Table III., with wand7r, takeC =-+1.8
In Table IV., with wu and ¢, take C) = —0.2
In Table V., with T—T’ and rtakeC’”= _ 0.0 ae

Difference of elevation, or h — 623.66 toises.
Gauss’s Tables give 623.64 toises,

Example 2.
Suppose to be given,

b = 342.68 Paris lines; ¢ — — 10°.38 Reaumur; ¢ = 65°.
b! = 285.47 Paris lines; t/ = — 14°.94 Reaumur; T — T’ = 0°. R.
t+ v’ = — 25°.32
r=— 6.33

In Table II. with 8 take H = 974.58

ee with 0’ take H’ = 228.28
Sa H — i!

H — H’ = 1746.30 100° 1 463
, t= — 633
teats 7 = —47.24 Ag
u = 699.06 Hee coe,
In Table III., with wv and 7, take C= + 1.8 199
In Table IV., with u and ¢, take C’ = — 1.2
h= 699.66

Gauss’s Tables give h = 699.72 toises.

402
Ve

TAB ik,

FOR REDUCING BAROMETRICAL OBSERVATIONS TO ANOTHER LEVEL, AND FOR

COMPUTING DIFFERENCES OF ELEVATION, BY M. C. DIPPE.

TaB ie I. — Argument, the observed Height of the Barometer at either Station.

Tenths of a Line.

Barom-
eter In
aaee 0 1 2 | 3 | 4 | 5 | 6 7 | ‘s 9
Bor B' H or H! in Toises =
270 0.7 2.2 3.7 5.2 6.7 8.2 9.7 11.2 12.8 14.3
| 271 15.8 17.3 18.8 20.3 21.8 23.3 24.8 26.3 27.8 29.3
| 272 30.8 32.3 33.8 35.3 36.8 38.3 39.8 41.3 42.8 44.3
273 45.8 47.3 48.8 50.3 51.8 53.3 54.8 56.3 57.8 59.3
274 60.8 62.2 63.7 65.2 66.7 68.2 69.7 71.2 72.7 74.1
275 75.6 771 78.6 80.1 81.6 83.1 84.5 86.0 87.5 89.0
23 Inch.
| 276 90.5 91.9 93.4 94.9 96.4 97.9 99.3 | 100-8 | 102.3 | 103.8
277 105-2) || 106.72 |) 10832) |) 109.7 =| S1TDE |) 11266.) W4aer | arse | 117-05) n1885
278 || 120:0 | 121-4 | 122.9. | 124-4 | 125.8.) 127-3" | 128-8) | 1302") WS 1sse2
279 || 1346 | 186-1 | 137.6] 189.0 | 140.5 | 142:0.| 143:4 | W449 | 14603) ates
280 | 149.38 | 150.7 | 152.2 | 153.6 | 155.1 | 156.5 | 158.0 | 159.5 | 160.9 | 162.4
281 || 163.8 | 165.3 | 166.7 | 168.2 | 169.6 | 171.1 | 172.5 | 174.0 | 175.4 | 176.9
282 178.3 | 179.8 | 181.2 | 182.7 | 184.1 | 185.6 | 187.0 | 188.5 | 189.9 | 191.4
283 || 192.8 | 194.2 | 195.7 | 197.1 | 198.6 | 200.0 | 201.4 | 202.9 | 204.3 | 205.8
284 || 207.2. | 208.6. | 210-1. | 211.5 4213-04 -204-4 | 216-8 -| 217-3 |) DIS 220.1.
285 || 221.6 | 223.0 | 224.4 | 225.9 | 227.3 | 228.7 | 230.2 | 231.6 | 233.0 | 234.5
|. 286 || 235.9 | 237.3 | 938.7: | 240.2 | 241.6 | 243.0°| 244.4 | 245.9 | 247.3 | 218.7
287 250.1 | 251.6 | 253.0 | 254.4 | 255.8 | 257.3 | 258.7 | 260.1 | 261.5 | 262.9
| 24 Inch.
| 288 .|| 264.4 | 263.8 | 267.2. |. 268.6 | 270.0 |. 271.4 | 272.9 |, 274.8 | 275-7 | 277.1
289 278.5 | 279.9 | 281.3 | 282.8 | 284.2°] 285.6 | 287-0 || 288-4) 289°8° | 291-2
290 || 292.6 | 294.0 | 295.4 | 296.8 | 298.3 | 299.7 | 301.1 | 302.5 | 303.9 | 305.3
291 306.77| 308.1 | 309:5,5)| 310:9 | -31223 7). 31827, | Sid521 |) 3665 | 317.92 esos
292 320.7 | 322.1 | 323.5 | 324.9 | 326.3 ]_327.7 | 329.1 | 350.5 | 331.9 | 333-3
293 || 334.7 | 336.1 | 337.5 | 338.9 | 340.2 | 341.6 | 343.0 | 344.4 | 345-8 | 3147.2
294 || 348.6 | 350.0 | 351.4 | 352.8 | 354.2 | 355.5 | 356.9 | 358.8 | 359.7 | 361.1
295 362.5 | 363.9 | 365.2 | 366.6 | 368.0 | 369.4 | 370.8 |. 372.2 | 373.57) 374.9
296 376.3 | 377.7 | 379.1 | 380.4 | 381.8 | 383.2 | 384.6 | 385.9 | 387.3 -| 388.7
297 || 390.1 | 391.5 | 392.8 | 394.2 | 395.6 | 397.0 | 398.3 | 399.7 | 401.1 | 402.4
293 || 403.8 | 405.2 | 406.5 | 407.9 | 409.3 | 410.7 | 412.0 | 413.4 | 414.8 | 416.1
299 |! 417.5 | 418.9; 420.2 | 421.6 | 123.0 | 124.3 | 425.7 | 427.1 | 428.4 | 429.8
25 Inch
300 || 431.1 | 432.5 | 483.9 | 435.2 | 486.6 | 487.9 | 439.3 | 440.7 | 442.0 | 443.4
| 301 | 444.7 | 446.1 | 447.5 | 448.8 | 450.2 | 451.5 | 452.9 | 454.2 | 455.6 | 456.9
302 || 458.3 | 459.6 | 461.0 | 462.3 | 463.7 | 465.0 | 466.4 | 467.8 | 469.1 | 470.5
303 | 471.8 | 473.1 | 474.5 | 475.8 | 477:2 | 478.5 | 479.9 | 481.2 | 482.6 | 483.9:
304 |, 485.3 | 486.6 | 487.9 | 489.3 | 190.6 | 192.0 | 493.3 | 494.7 | 196.0 | 4197.3
305 498.7 | 500.0 | 501.4 | 502.7 | 504.0 | 505.4 | 506.7 | 508.0 | 509.4 | 510.7
306 | 512.0 | 513.4 | 514.7 | 516.0 | 517.4 | 518.7 | 520.1 | 521.4 | °522.7-| 524.0
D 62

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DIPPE. 403

Tasce I. Continued.

| Barom- | 3 Tenths of a Line.
eter in
Paris |
Lines. oO 1 2 oy 4 oD & a 8 9

306 || 512.0 513.4 | 514.7 | 516.0 | 517.4 | 518.7 | 520.1 521.4 | 522.7 | 524.0
307 525.4 526.7 528.0 529.4 530.7 532.0 | 533.4 534.7 536.0 537.4
308 538.7 540.0 | 541.3 | 542.6 | 544.0 | 545.3 | 546.6 | 5417.9 | 549.3 550.6
309 551.9 553.2 | 654.6 | 555.9 | 557.2 558-5 | 559-8 | 561-2) | 562.5 | 563:8
310 565.1 566.4 | 567.8 569.1 570.4 571.7 | 573.0 | 574.3 | 575.6 | 576.9
311 || 578.3 579.6 | 580.9 582.2 583.5 584.8 | 586.1 | 587.5 | 588.8 590.1
| 26 Inch.
S12) | 591-4 592.7 | 594.0 | 595.3 596.6 597.9 | 599.2 | 600.6 | 601.9 | 603.2
313 604.5 605.8 | 607.1 608.4 | 609.7 | 611.0 | 612.3 | 613.6 | 614.9 | 616.2
3l4 617.5 618.8 620.1 621.4 622.7 624.0 | 625.3 626.6 627.9 629.2
315 630.5 631.8 | 633.1 634.4 | 635.7 637.0 | 638.3 | 639.5 | 640.8 | 642.1
316 643.4 644.7 | 646.0 | 6417.3 | 648.6 649.9 | 651.2 | 652.5 | 653.8 655.1
317 656.3 657.6 | 6585.9 | 660.2 | 661.5 662.8 | 664.1 665.4 | 666.6 | 667.9

318 669.2 | 670.5 | 671.8 | 673.1 | 674.3 | 675.6 | 676.9 | 678.2 | 679.5 | 680.8
319 652.0 | 683.3 | 684.6 | 685.9 | 687.2 | 688.4 | 689.7 | 691.0 | 692.3 | 693.6
320 6914.8 | 696.1 | 697.4 |. 698.7 | 699.9 | 701.2 | 702.5 | 703.8 | 705.0 | 706.3
321 G07-6)\2 405-9) T1LOlE We aes Se we Oe andor) | 76-5) |) Ween (2 71920
3227 || 720-3 | 721.6 | 722:8 | 724.0 | 725.4 | 726.6 | 727.9 | 729.2 | 7304 | 731.7
325 733.0 | 734.2 | 735.5 | 736.7 | 738.0 | 739.3 | 740.5 | 741.8 | 743.1 | 744.3

27 Inch.
324 745.6 7416.8 748.1 749.4 750.6 751.9 753.2 7544 755.7 756.9
BD stil

5
325 758.2 | 759.4 | 760.7 | 761.9 | 763.2 | 764.5 | 765.
326 MOM linc-Oo | eigoex si t-Om | Mout WideO| wiSer ih s79s00 || tesa |) 182.0
327 WSa2 |) 782.5) |@sou |) WSe-0) |) T8S-2) ) 769-0 || 790.7% | 792-0) | 793-2) |) W9d-5
328 199.7 | 797-0 | 79S.2 | 799.4 | 800.7 | 801-9 | 803-2 || SO4-4 | 805-7 | 806.9
329 808.2 | 809.4 | 810.6 | 811.9 | S13.1 | 814.4 | 815.6 | $16.8 | 818.1 | 819.3

767.0 | 768.2 | 769.5

330 820.6 | 821.8 | 823.0 | 824.3 25.5 | S26.7 | 828.0 | 829.2 | &30.4 | 831.7
331 832.9 | 834.2 | 835.4 | 836.6 37.9 | 839.1 | 840-3 | 841.6 | 842.8 | 844.0
332 845.2 | 8416.5 | 847.7 | 8418.9 | 850.2 | S51.4 | 852.6 | 853.9 | 855.1 | 856.3
333 857.5 | $58.8 | 860.0 | $61.2 | 862.4 ] 863.7 | 864.9 | 866.1 | 867.3 | 868.6

334 869.8 | 871.0 | 872.2 73.4 | 874.7 | 875.9 | 877.1 | 878.3 | 879.6 | 880.8

335 882.0 883.2 | 884.4 | 885.7 | 886.9 | 888.1 | 889.3 | 890.5 | 891.7 | 893.0
28 Inch

336 891.2 895.4 | 896.6 | 897.8 | 299.0 | 900.3 | 901.5 | 902.7 | 903.9 | 905.1

337 906.3 907.5 908.7 909.9 | 911.2 912.4 | 913.6 914.8 | 916.0 | 917.2

338 918.4 919.6 | 920.8 922.0 | 923.3 | 924.5 | 925.7 | 926.9 | 928.1 929.3
e350 930.5 931.7 | 932.9 | 934.1 | 935.3 [ 936.5 | 937.7 | 938.9 | 940.1 | 941.3

340 912.5 913.7 | 944.9 | 946.1 947.3 918.5 | 9419.7 | 950.9 | 952.1 953.3

341 954.5 955.7 | | 959.3 | 960.5 | 961.7 | 962.9 | 964.1 | 965.3

| 956.9 | 958.1

| 842 ||) 966.5 | 967.7 | 968.9 | 970.1 | 971.3 | 9725 | 973.7 | 974.8 | 976.0 | 977.2
| 343, || 978.4 | 979.6 | 930.8 | 982.0 | 953.2 | 984.4 | 955.6 |. 986.8 | 957.9 | 959.1
344 || 990.3 | 991.5 | 992.7 | 993.9 | 995.1 | 996.2 | 997.4 ; 998.6 | 999.8 |1001.0

|

315 ||1002.2 1003.4 1004.5 1005.7 |1006.9 }1008.1 1009.3 1010.5 1011.6 1012.8

| 346 ||1014.0 1015.2 1016.4 |1017.5 |1018.7 |1019.9 |1021.1 1022.3 1023.4 1024.6
|
|
|

347 1025.8 | 1027.0 1028.1 1029.3 1030.5 }1031.7 |1032.8 )1034.0 1035.2 (1036.4
29 Inch | | |
348 1037.5 | 1038.7 1039.9 1041.1 |1042.2 [1043.4 |1044.6 1045.8 10469 |1048.1

Se a ea

D 63

404

BAROMETRICAL MEASUREMENT OF HEIGHTS. — DIPPE.

Taste Il.
CORRECTION FOR THE TEMPERATURE OF THE AIR.
t te
ARGUMENT, 2T = ee,
Qt rd Diff. | 27 a! Dif. | 27 a | Diff. || 27 tl Diff.
=25,| -14.29 |" | S12 | 6.38 |. fit 2 40-50), | 5 | et e688 | ae
—24| -13.64 T PU libel a 2] 0.99 | 7, | 15]. 6931 ois
23 | -13.00 | | || 10] —5.26 ie BY 4B hoe Le MGI a eT) ae
22] 12.36 | 0 || -— 9] —471 1, af 88. |. tia 7.83 | is
—21} -11.73 | °" || -8]| -4.17 |]. ~ 5] 2.44 . 18 8.26 | —
0.62 0.54 0.47 0.42
SATAY |S ee os 6] 2.91 | 94. | 19] 8.68 ah
19] -10:50] 9, || — 6] -3-09 oe Ti 888 tN ae0ll| SV 20On| age
Hai Geo Pee BY 8.85 ek ly ZEN yoo O | wean
SW 9:29 |) = a | 2 1 9 AB lak see 9.91 nae
STG S670" | tee | es toa ae 10] 4.76 ; 23] 10.31 | —
0.59 | 0.51 0.44 0.40 |
Si5e — 8.110) | Pet— Qire-1.OM Ta |S U1 | erp ESD 24] 10-71 | |
Vai} — 7.58:] i — 10.50 Jo | we) BG | eo) Met |
-13 | — 6.95 ih Nea 0.0/5 eli 18)|216.10 H/F eee) SIT) ee
12" — 6.385) jeri tL aee-+0.500 |e | +14] 46.51 | \etog i eReeo"|, ee
Taste III. ror C.
ARGUMENTS, fA and t.
In computing Heights reverse the signs of C.— Arguments, t and w.
nesta) +, in Degrees of Reaumur =
Toises. | | | 29° [19 Bo"),, — gor) igo 0° +4° | +8° | +12°/ +160)
50 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
100 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3 0.3
|| 150 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4 0.4
|| 200 0.4 0.5 0.5 0.5 0.5 0.5 0.6 0.6 0.6
250 0.5 0.6 0.6 0.6 0.6 0.7 0.7 0.7 0.7
300 | 0.7 0.7 0.7 0.7 0.8 0.8 0.8 0.9 0.9
350 0.8 0.8 0.8 0.9 0.9 0.9 1.0 1.0 1
400 0.9 0.9 1.0 1.0 1.0 Led 1.1 1.2 1.2
450 1.0 1.1 1.1 1.1 1.2 1.2 1.3 1.3 14
500 le 1.2 1.2 1.3 Ls, 1.4 1.4 1.5 1.5
550 1.2 1.3 1.4 1.4 1.5 15 1.6 1.6 1.7
600 t4 1.4 1.5 1.6 1.6 1.7 1.7 1.8 1.9
650 1.5 1.6 1.6 1.7 1.8 1.8 1.9 1.9 2.0
700 1.6 ie 1.8 1.8 1.9 2.0 2.0 2.1 moh
750 1.7 1.8 1.9 2.0 2.0 om 2.2 2.3 2.371}
800 1.9 2.0 2.0 2.1 2.2 2.3 2.4 2.4 2.5
850 2.0 2:1 2.2 2.3 2.3 2.4 2.5 2.6 2.7
900 2.1 2.2 2.3 2.4 2.5 2.6 2h 2.8 2.9
950 2.3 2.4 2.5 2.6 2.7 2.7 2.9 3.0 3.1
1000 2.4 2.5 2.6 2.7 2.8 2.9 3.1 3.2 3.3
D 64

BAROMETRICAL MEASUREMENT OF IIEIGHTS. — DIPPE.

TastE IV. For C’.

CORRECTION IN TOISES FOR THE CHANGE OF GRAVITY IN LATITUDE.

In computing Iecights, reverse the signs of C!. ARGUMENTS g and wu

pera Bate

| it ; Pam ND. GOB not 0A Saori
/ atitude. : See erence of Level, in Toises. ae |
Bp as 100 200 | 300 400 500/600 700) 800 900 1000)
Wea | 90 | war ots 11 pd.es |. 101 Psah AGroly Mea 241.| 28 | 26 |
| 5 85 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.6 ||
| 10 Xt) 0.2 0.5 Dez Aealc0 1,2.) 15 1.7 2.0 2 2.4 1
Heras 75 Os Ort. |a,0s7) 0.9 Tem Peles, et-G: es) 0] 200" Lace:
| 20 70 0.2 0.4 0.6 | 0.8 Os 4 1.6 1.8 2.0
{; 25 65 O12) C3: |. 10.5 A Olde PeOee a a Ovop ee ede o(d.0 7 KT oll
1 30 60 0.1 0.3 0:4 NP, O:5 0.6 | 0.8 0.9 1.0 1.2 138 |
ilo ba 001 0.2 0.3 | 0.4 0.4 | 0.5 0.6 0.7 0.8 0.9 ||
|| 36 Od 0.2 0.2 0.3 0.4 | 0.5 0.6 0.6 0.7 0.8 ||
Sy 53 0.1 0.1 0:2 110-3 0.4 | 0.5 0.5 | 0.6 0.6 0.7
i 4388 52. i) Ol 0.1 0.2 | 0.3 0:3. | 0.4 0.4 0.5 | 0.6 0.6
39 Bt On 0.1 0.2 0.2 0.3 0.3 0.4 0.4 0.5 0-5 {||
40 50 |i 0.1 0.1 0.1 | 0.2 0.2 | 0.3 0.3 0.4 | 0.4 0.5 |
41 1G 41500) Ost Oot Vin O:t 6:2, | 70.2 0.3 | 0.3 0.3 0:4.. ||
42 48: 1.0.0 Pi. O.1 Onl {FORT 0.1. [902 0.2 0.2 0.2 0.3 |
43 AZ 004) 0.050! Ot 2 foc) sO 0.2 ost !*:0.1) | 0.2" |. 0:2. ||
44 Meee t0-0|, 0:08 0-00! 0-00 0:0 00 | Oll | 0-1 120.1" Pe Oct|
45 45 0.0 | 0.0 0.0 | 0.0 0.0 | 0.0 0.0 0.0 0.0 0.0 |
i TABLE V.._For,'C!,
ArGuments t and T—T’. To be used only in computing Heights.
| T_T : US aenr c ourection ic: cz pam toises we the Sameeen ic a |
iiteannnns —H2°;} —10°| —8° | —6° | —4° | —2° oo | +9° |) +4° | +60
0 0.0 0.0 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 |
1 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.0 0.0
2 0.4 03 0.3 0.3 0.2 | 0.2 0.2 0.1 0.1 0.0 |
3 0.6 0.6 | 0.5 0.4 0.4 0.3 0.2 0.2 0.1 0.1 |
4 0.8 0.7 0.6 0.5 0.5 | 0.4 0.3 0.2 0.2 Dab
5 Io 09 | 08°07 | 0.6 | 05 | Od | Be Oe | Ody
6 1.1 1.0 0.9 0.8 0.7 | 0.6 0.5 0.4 0.3 OM
7 ea alo |e Ids Wma” |.-0.8 LL FT| Os6ral), 6.4 310 08-030) |
8 1.5 1.4 12 1.1 0.9 0.8 0.6 0.5 0.3 0.2 !
| 9 17 1.6 1.4 1.2 1.1 09 0.7 0.6 0.4 0:20
ie 30 i ekse 17 1.5 14 1291.0 core 0.6% |) OH 0.2
| Correction for T — T! with contrary sign; + = |
; T_T | +8° | +100 +120 +14°7 T-T' | oe +10°° +120, 44aac
i - - —| —_—_-[- — - =| - =
eeaetmeay), (Od 0.07] °0.0:. | (0.0 G tit h ebee-L | 02 | 0.3 |
IF 2 f 0.0 0.0 0.1 0.1 a | 0.0 0.1 0.2 0:3!) |
| 3 tl 0.0 0.0 0.1 0.1 8 | . 0.0 0.1 0.2 Oy. j
4 0.0 0.0 0.1 0.2 9 | 0.0 0.1 0.2 0.4 |
5 i| 0.0 10 | 0.0 0.1 0.3 0.4

a vale

LAPLACE’S FORMULA FOR COMPUTING DIFFERENCES OF ELEVATION FROM
BAROMETRICAL OBSERVATIONS, MODIFIED BY BABINET.

In the Comptes Rendus de ? Académie des Sciences for March, 1851, M. Babinet
proposes the following modification of Laplace’s formula, the object of which is to
dispense both with the use of logarithms and with tables of any kind.

oy,

Laplace’s formula is,
z = 18393 metres (log H — log h) [: 4 aebea

z being the difference of level between the two stations,

H, the height of barometer at the lower station,

h, the height of barometer at the upper station,

T, temperature of air at the lower station,

t, temperature of air at the upper station.

The two barometers are supposed to be reduced to the same temperature. The
small correction for the latitude is omitted.

For elevations less than 1000 metres, and even for much greater elevations, if
approximate results only are needed, the formula may be transformed into the fol-

lowing :
oie H—A 2(T+2)
z == 16000 metres Hoh [3 + — Gee | :
Example 1.
Suppose,
at lower station, barometer at zero Cent. = '755™™; temperature of air 15° Cent.
at upper station, barometer at zero Cent. = 745™"; temperature of air 10° Cent.
B=) >" 710": T + ¢ = 25° Cent.
H + A = 1500"" 2 (T + 2) = 7385 = 05.
Then z = 16000,48, X (1.05) = 112 metres.

Laplace’s formula, by Delcros’s tables, would give 111.6 metres.

Example 2.

Suppose,
at lower station, barometer at zero Cent. = 730"; temperature of air 20° Cent.
at upper station, barometer at zeroCent. = 635™"; temperature of air 15° Cent.
= je) Qa" T + t = 35° Cent.
H+ h = 1365"" 2(T + t) = 7385 = .07.
Then z = 16000,23. x (1.07) = 1191.5 metres.

Laplace’s formula, by Delcros’s tables, would give 1191.1 metres.
For greater elevations an intermediate station may be supposed,
Babinet’s formula reduced to English measures becomes,
Heals ie Ce
= O04 lish fee 1 ;
% aE oe e et, + 900 ;
but as, in this form, it loses the simplicity of its coefficient, it will be found, on trial,
that its use requires rather more computing than the author’s tables (II.), p. 88, which
give more accurate results.

D 66

407

VET:

TABLES

FOR COMPUTING THE DIFFERENCE IN THE HEIGHTS OF TWO PLACES BY MEANS OF
THE BAROMETER, — BAILY.

Batty, in his Astronomical Tables and Formule, page 111, gives the following
final formula ;
x = 60345.51 §1 + .0011111 (¢ + ¢’ — 64°)?

B 1
Where ¢ = the latitude of the place,

8 = the height of the barometer,
) at the lower

t = the temperature, Fahrenheit, of the mercury, :
t = the temperature, Fahrenheit, of the air, ) een
B’ = the height of the barometer,
7’ = the temperature, Fahrenheit, of the mercury, te en
t’ = the temperature, Fahrenheit, of the air. :
The numerical values assumed are as follows : —
The constant barometrical coefficient = 60158.53 English feet.
The expansion of moist air for 1° Fahrenheit = .0022222.
The expansion of mercury for 1° Fahrenheit = .0001001.
The increase of gravitation from Equator to Poles = .00539.
The radius of the Earth at @ = 20898240 English feet.
The height of lower station assumed = 4000 English feet.

Make A = the log of the first term, in English feet.
B = the log of 1 + .0001 (r—7’).
C = the log of the last term.
D = log B — (log p’ + B).
Then, by the tables which follow, the logarithm of the difference of altitude in

English feet
= A+C-+ log D.

Baily’s Tables have been recomputed and extended by Downes, for Lee’s Collection
of Tables and Formule (2d edit. pp. 84, 85). These new tables are given here as

revised by Mr. Downes for this volume.
D 67

408 BAROMETRICAL MEASUREMENT OF HEIGHTS. — BAILY.
I. THERMOMETERS IN THE Open AIR.
i+¢ A t+t! A j ¢+¢! A t+i! A t+ 7! A
SAG Wala as te Lett
° Oo ° Oo fo)
1 | 4.74918 37 | 4.76742 || 73 | 4.78497 109 | 4.80183 || 145 | 4.81807
|
2 | 4.74965 38 | 4.76791 | 74 | 4.78544 110 | 4.80229 || 146 | 4.81851 |
3 | 4.75016 39 | 4.76841 75 | 4.78592 111 | 4.80275 || 147 | 4.81896
4 | 4.75068 40 | 4.76891 76 | 4.78640 || 112 | 4.80321 148 | 4.81940
5 | 4.75120 41 | 4.76940 | 77 | 4.78687 || 113 | 4.80367 149 | 4.81984
]
6 | 4.75171 42 | 4.76990 | 78 |. 4.78735 || 114 | 4.80413 150 | 4.82028
7 | 4.75223 43 | 4.77039 || 79 | 4.78782 || 115 | 4.80458 151 | 4.82072
8 | 4.75274 44 | 477089 || 80 | 4.78830 || 116 | 4.80504 152 | 4.82116
9 | 4.75326 45 | 4.77188, || 81 | 4.78877 117-| 4.80550 || 153 | 4.82160
10 | 4.75377 46 | 4.77187 || 82 | 4.78925 || 118 | 4.80595 || 154 | 4.82204
11 | 4.75429 47 | 4.77236 || 83 | 4.78972 || 119 | 4.80641 155 | 4.82248
12 | 4.75480 48 | 4.77285 84 | 4.79019 || 120 | 4.80686 || 156 | 4.82291
13 | 4.75531 49. | 4.77335 85 | 4.79066 || 121 | 4.80731 157 | 4.82335
14 | 4°75582 50 | 4.77384 86 | 4.79113 || 122 | 4.80777 || 158 |. 4.82379
15 | 4.75633 51 | 4:77433 87 | 4.79160 || 123 | 4.80822 || 159 | 4.82423
16 4.75684 52 4.77482 88 4.79207 124 4.80867 160 4.82466
17 | 4.75735 53. | 4.77530 89 | 4.79254 || 125 | 4.80913 161 | 4.82510 |
18 | 4.75786 54 | 4.77579 90 | 4.79301 126 | 4.80958 || 162 | 4.82553 |
19 4.75837 55 4.77628 91 4.79348 127 4.810038 163 4.82597
20 4.75888 56 4.77677 92 4.79395 128 4.81048 164 4.82640
|| 21 4.75938 57 4.77725 93 4 79442 129 4.81093 165 4.82684
| 92 | 4.75989 58 | 4.77774 94 | 4.79489 | 130 | 4.81138 166 | 4.82727
23 | 4.76040 59, | 4.77823 |} 95. | 4.79585 |) 131 | 4.81188 || 167 | 4.82770
|| 24 |. 4.76090 60 | 4.77871 96 | 4.79582 132 | 4.81228 | 168 | 4.82814
25 4.76141 61 4.77919 97 4.79628 133 4.81273 169 4.82857 |
26 4.76191 62 4.77968 98 4.79675 134 4.81317 170 4.82900
27 | 4.76241 63 | 4.78016 99 | 4.79721 || 135 | 4.81362 || 171 | 4.82943
28 | 4.76292 64 | 4.78065 || 100 | 4.79768 || 136 | 4.81407 || 172 | 4.82986
| 29 4.76342 65 4.78113 101 4.79814 137 4.81452 173 4.83029
30 4.76392 66 4.78161 102 4.79861 138 4.81496 174 4.83072
||
|
31 4.764412 67 4.78209 103 4.79907 139 4.81541 175 4.8311b
| 32 | 4.76492 68 | 4.78257 || 104 | 4.79953. || 140 | 4.81585 176 | 4.83158
33 | 4.76542 69 | 4.78305 || 105 | 4.79999 || 141 | 4.81630 || 177 | 4.83201
|| 34] 4.76592 70 | 4.78353. ||. 106 | 4.80045 || 142 | 4.81674 || 178 |. 4.83244
35 | 4.76612 71 | 4.78401 || 107 | 4.80091 || 143 | 4.81719 || 179 | 4.83287
36 4.76692 72 4.78449 108 4.80137 144 4.81763 180 4.83330
\
D 68

BAROMETRICAL MEASUREMENT OF HEIGHTS. — BAILY.

409

Upper Station.
Thermometer in open air, ¢/ = 70.4,
Attached-Thermometer, 7 = 70.4,

Ill. Latirupe oF
Il. Arracnep THERMOMETER. :
é THE PLAcE.
T—T B TT B | r—r B | C
|
oO ° ° °o
0 0.00000 20 0.00087 40 0.00174 0 0.00117
1 0.00004 21 0.00091 41 0.00178 5 0.00115
2 0.00009 22 0.00096 42 0.00182 10 0.00110
3 0.00013 23 0.00100 43 0.00187 15 0.00101
4 0.00017 24 0.00104 44 0.00191 20 0.00090
5 0.00022 25 0.00109 45 0.00195 25 0.00075
6 0.00026 26 0.00113 46 0.00200 30 0.00058
us 0.00020 ot 0.00117 47 0.00204 35 0.00040
8 0.00035 28 © 0.00122 48 | 0.00208 40 0.00020
9 0.00039 | 29 0.00126 49 | 0.00212 45 0.00000
10 0.00043 30 0.00130 50 0.00217 50 9.99980
11 0.00048 31 0 00135 51 0 00221 55 9.99960
12 0.00052 32 0.00139 52 0.00225 60 | 9.99942
13 0.00056 33 0.00143 53 0.00230 65 9.99925
14 0.00061 3+ 0.00148 54 0.00234 70 9.99910
15 0.00065 35 0.00152 55 0.00238 75 9.99900
16 0.00069 | 36 | 0.00156 56 0.00243 80 9.99890
17 0.00074 37 0.00161 57 0.00247 85 9.99885
18 0.00078 38 0.00165 58 0.00251 90 9.99883
19 0.00083 | 39 0.00169 59 0.00256
1]
tet |
EXAMPLE.

Lower Station.

6G:
eos

Barometer, B’ = 23.66 inches, 8 = 30.05 inches.
Latitude of the place @ssigdes
B = 0.00031 log D = 9.01502
log p’ = 1.37401 C = 0.00087
1.37432 A = 4.81940

log 8 = 1.47784
D = 0.10352

69

3.83529
= 6843.7 English feet.

410

V Ere
TABLES

FOR COMPUTING DIFFERENCES OF ELEVATION FROM BAROMETRICAL OBSERVATIONS,
BASED ON BESSEL’S FORMULA.

Br E. PLANTAMOUR.

[These Tables, computed by Professor E. PLanramour, Director of the Observatory at Geneva,
Switzerland, are found in Vol. XIII. Part 1, of the Mémoires de la Société de Physique, 5c. de Genéve,
p. 63, together with the following explanations.]

In No. 356 of the Astronomische Nachrichten, Bessel published a paper on the
measurement of heights by means of the barometer, in which he deduces a formula
which contains a factor depending on the humidity of the air. This formula is:

spe Ep) Se teas Pere 10
°P ~La+KD yPP

>

P (¢) .H —i 0.002561 0.0279712 T — 0.0000625826 T?
log == l—a

where the various quantities have the following signification : —

h being the elevation of the lower station, and
h’ the elevation of the upper station above the level of the sea,

a = the radius of the Earth,
ah
is ath
ae
ae ath?
P = the weight of the atmosphere at the lower station,
P’ = the weight of the atmosphere at the upper station,

the unit of weight assumed being the pressure of a column of mercury

D 70

BAROMETRICAL MEASUREMENT OF HEIGHTS. 411

of 336.905 Paris lines, at the temperature of the freezing point, or zero
Reaumur, and under the 45th degree of latitude.

(g) =the gravity, at the level of the sea, in the mean latitude between the
two places of observation.

Therefore, calling ¢ the latitude,

(zg) = 1 — 0.0026257 cos ¢,

L = the constant barometrical coefficient depending on the relative density of
the mercury and of the air,

K = the coefficient of the expansion of the air,

T =the mean temperature of the layer of air between the lower and upper
station,

a = the fraction of saturation of the same layer.

The second term in the parenthesis, destined to take into account the aqueous
vapor in the air, was obtained by assuming that the elastic force of vapor for a
temperature T is represented, in unit of weight, by the expression,

p = 0.0067407 X 10 0.0279712 T — 0.0000625826 T 2,

Multiplying the second member by 336.905 we find the expression of the elastic
force of vapor that Laplace deduced from Dalton’s experiments. Substituting, in
the computation, Regnault’s results, the numerical value of these coefficients 1s some-
what changed, and we find then

p = 0.0060527 x 10 0.0301975 T — 0.000080170 T .

Bessel’s tables give the difference of elevation in toises. The logarithm of the dif-
ference is obtained by the sum of four logarithms. The same form is preserved in
the following tables ; but the differences of elevation are given in metres.

The term due to the expansion of the air is computed in Bessel’s tables for two
values of the coefficient, viz. that of Gay-Lussac, 0.00375, and that of Rudberg,
0.003648 ; in the new tables it is only computed for that of Regnault, 0.003665.

The relative density of dry air at the freezing point, under a barometrical pressure
of 0":.76, and at the 45th degree of latitude, and of mercury in the same circumstan-
ces, adopted by Bessel, is that determined by the experiments of Biot and Arago, viz.

1
10466.8°
substituted. Regnault found the weight. of a litre of dry air, at zero Centigrade,
under a pressure of 0.76, and at the latitude of Paris, to be 1.293187 grammes,
which, reduced to the gravity of the 45th degree of latitude, becomes 1.292732
grammes. The weight of a litre of mercury, at zero Centigrade, he found to be
13596 grammes ; the ratio is thus:

The value of that constant derived from Regnault’s experiments has been

Ds 1
me elO scree

D 71

412 ; BAROMETRICAL MEASUREMENT OF HEIGHTS.

or about 34g smaller than the value adopted by Bessel. If the constant coefficient

; O™-.76 ; { :
L is expressed by L = ee p» being the modulus of the common logarithms, its
numerical value becomes

L = 18404™..8.

In order to reduce the formula into tables, Bessel caused it to undergo several
modifications, which we have followed, introducing the values of the constants above
mentioned.

Let 6 and dD’ be the heights of the barometer, expressed in the metrical scale, at
the two stations; ¢ and @’, the temperatures of the mercury measured with a brass

scale ; we have,

eee (2) a ) (1 + 0.00001879 2)
~~ 0™.76 "87" Nath} (1 + 0.00018018 2)’
and
Pi pat? oh (aye (ts nao DOUBT)
= om.76 *\87° =) (1 + 0.00018018 ¢’)’
Therefore,
tog P = logb + log (g) — log 0™.76 — ean — »t [0.00018018 — 0.00001879 },

log P! = log b! + log (g) — log 0".76 — a F __ 1 1’ [0.00018018 — 0.00001879}.

If we call B, B’ the heights of the barometer reduced to the freezing point, which
we obtain by making

log B = log b — t. 0.000070095; log B’ = log B/ — t . 0.000070095,

P H —H
log pp = log.B— log Bit 300755"
and with sufficient accuracy,
yBB
Om. 76

hie

Substituting these expressions in the formula, it becomes,

log B — log B’/ =

(g).W—HY,* LU+KT) _ a. 0.001748 |, 0.0301975 T— 0.000080170 mi
L(i+ KT) [ ;

+ (g). 7829755. ,, BB

If we set instead of a the half sum neh * of the fraction of saturation observed at

“

both stations, we find, after some transformations,

D 42

BAROMETRICAL MEASUREMENT OF HEIGHTS. 413

g) (HW! — H) (397.25 — KT)
398.25. L(+ KT)
ce (aa) . 0.34807, 0.0301975 T — 0.000080170 ai

log B — log B’ = x

(397.25 — KT) y BB’’

Making further,

V= 39795 —kpu+KT),

0.34807 0.0301975 T — 0.000080170 F2
eer ee eee tO :
SO) — Ne

we shall have for the logarithm of the approximate difference of level between the
two stations H’ — H,

log (H’ — H) = log [log B — log B’]
1
+ log V + log Aa + log Le

fee
Saar

Table I. gives the values of log V and log W, both of which only depend on the
temperature ; the argument is the sum of the temperature of the air, 7 and 1’, ob-
served at both stations, supposing r + 7/ = 2T.

Table Il. gives the factor depending on the humidity of the air; with the argu-
ment

afta
W . lo BR’

St
we obtain

in ;
8 one) == LO Wie
V BB’

Table III. gives the factor depending on the latitude for every degree, viz.

log G’ = log
- (a)
The logarithm of the approximate difference is thus given by the sum of four

logarithms. ‘To obtain the exact elevation, the small correction found in Table IV.

must be added to the number corresponding to that logarithm. For we have, with the

necessary accuracy,

H?2

a .

Ve ey

9

Table IV, gives, for every 200 metres, the quantity i the number in the table

: it? : :
corresponding to a must be added to the approximate elevation ; and the number

: H
corresponding to a must be subtracted from the same.

D 73

414 BAROMETRICAL MEASUREMENT OF HEIGHTS.

Use oF THE TABLES.

Reduce first the observed height of the barometer at both stations to the freezing
point by means of the usual tables, or by the logarithmic formula,

log B = log b —t. 0.00007, log B’ = log b’ — t’ 0.00007 ;

b and Dd’ being, in fractions of metre, the observed heights at the temperatures ¢ and ¢’
marked by the attached thermometers ; and B and B’ the reduced height at the lower
and upper station.

Take the difference of log B and log B’, and find, in the tables of the common
logarithms, the logarithm of that difference, viz. log (log B — log B’); find also

the logarithm of the product +/ B BY’, or

log / BB’ SPE ante :
Make further the sum 7 ++ 7’ of the temperature of the air at both stations, and like-
wise the sum of a + qd’ of the fraction of saturation.

Then, in Table L, with argument r + 1’, take log V and log W; further, to log W
add log (a + a’), and subtract log 4/ BB’; and with the logarithm thus obtained as
argument, take in Table II. log V’.

Table IIL. with the mean latitude of the stations gives log G’.

H’ — H being the approximate difference of level between the two stations, we
have

log (H’ — H) = log (log B — log B’) + log V + log V’ + log G’.

The altitude of the Jower station being known, we deduce from H! — H the ap-
proximate altitude, H’, of the upper station ; h’, the exact altitude, or h’ — h, the
difference of elevation, is given by the formula,

i 2
es eee shes

a

C4 2
Table IV. gives the values of ie and = for the values of H’ or H for every

a

200 metres.
Example 1.

Computing the height of St. Bernard, taking Geneva, 407 metres above the level
of the sea, as the lower station. The observation gives,

B = 726.43 millimetres B’ = 563.64 millimetres

7 = -+ 8°.97 Centigrade 7 = — 1°.89 Centig. r + 7! = + 7°.08
ae 0.77 e 0.80 a+da = 1 57

log B: = 986919 log / (B B’) = 9.8061

log B' = 9.75100 Table I. log W = 7.0511

log B — log B’ == 0.11019 log (a + a’) = 0.1959

(oa) wy ete
log yBB * W = 7.4409

D 74

PAROMETRICAL MEASUREMENT OF HEIGHTS. 415

log [log B — log B’] = 9.04215
In Table I. argt. rr’ = +7.08, log V= 4.27164
In Table II. argt. 7.4409, loz Va== 0.00120
In Table III. argt. 46°, log G’ = — 0.00004
log (H’— H) = 3.81495
H’— H == _ 2065.1 metres.
72 2
In Table IV. 5-—-=+ 09
h'—h= 2066.0
Geneva altitude h = 407.0
St. Bernard above the level of the sea A’ = 2473.0 metres.
Example 2.

Computing the height of Mont Blanc from the observations of Bravais and Martins,
on the 29th of August, 1844, taking St. Bernard (2473.0 metres) as the lower sta-
tion. ‘The observation gives,

B = 568.03 millimetres B/ = 424.29 millimetres
tr = + 7°.6 Centigrade r’ = — 9°.1 Centig. r + 7’ = — 1°.5
—— 0.59 Qo 0.57 ata= 1.16
log B = 9.75437 log »/ B B’ = — 9.6910
log B’ = 9.62766 Table I. log W = 6.9183
log B — log B’ = 0.12671 log (a+ a‘) = (0.0648
ana LEN) Cae
log yBB ° Wea), 92921
log [log B — log B’] = 9.10281
In Table I. argt. — 1°.5, log V = = 4.264838
In Table II. argt. 7.2921, log V’ = 0.00087
In Table Ill. argt. 46°, log G’ = — 0.00004
log (H’ — H) = _— 3.86847
Hi’— H= 2336.0 metres.
[ with argument 4800 + H =+ 3.6
In Table IV. 4 si
l with argument 2473 — A as 0.9
hf — fi aed
St. Bernard altitude, h = 2473.0
Mont Blane above the sea, h’ = 4811.7 metres.

tHr!.

|
aw0M oO

|
ou

I
or Nw

+++
oman DS

+12

+ t++e+t+
oO ao kWh =

BAROMETRICAL MEASUREMENT OF HEIGHTS. — PLANTAMOUR.

log. V.

4.24644
4.24728
4.24811
4.24894
4.24977

4.25471
4.25553
4.25634
4.25716
4.25797

4.25878
4.25959
4.26040
4.26121
4.26202

4.26282
4.26562
4.26443
4.26523
4.26603

4.26682
4.26762
4.26841
4.26921
4.27000

4.27079
4.27157
4.27236
4.27315
4.27393

4.27471
4.27550
4.27628
4.27705
4.27783

1)

Argument = + + 7!,

log. W.

6.5362
6.5441
6.5620
6.5797
6.5974

6.6157
6.6341
6.6521
6.6700
6.6879

6.7057
6.7232
6.7407
6.7581
6.7755

6.7926
6.8096
6.8266
6.8436
6.8603

6.8770
6.8935
6.9100
6.9263
6.9426

6.9581
6.9736
6.9889
7.0043
7.0195

7.0347
7.01499
7.0650
7.0800
7.0950

7.1099
7.1248
7.1397
7.1545
7.1692

TABLE I.

log. V.

4.27783
4.27861
4.27938
4.28016
4.28093

4.28170
4.28247
4.28323
4.28400
4.28477

4.28553
4.28629
4.28705
4.28781
4.28857

4.28933
4.29008
4.29084
4.29159
4.29234

4.29319
4.29384
4.29459
4.29534
4.29608

4.29683
4.29757
4.29831
4.29905
4.29979

4.30053
4.30127
4.30200
4.30273
4.30347

4.30420
4.30493
4.30566
4.30639
4.30711

log. W.

7.1692
7.1839
7.1985
7.2131
7.2275

7.2420
7.2564
7.2708
7.2850
7.2993

7.3135
7.3276
7.5417
7.3557
7.3697

7.3837
7.3975
7.4114
7.4252
7.4389

7.4526
7.4662
7.4798
7.4933
7.5068

7.5202
7.5336
7.5470
7.5602
7.5735

7.9867
7.5999
7.6130
7.6260
7.6390

7.6519
7.6648
7.6777
7.6905
7.7033

76

Centigrade Degrees.

eit gil,

= ——————————s
SS S| 1

log. V.

4.30711
4.30784
4.30856
4.30929
4.31001

4.31073
4.31145
4.31217
4.31288
4.31360

4.31432
4.31503
4.31574

log. W.

7.7033
7.7160
7.7287
7.7413
7.7539

7.7664
7.7789
7.7914
7.8038
7.8161

7.8285
7.8407
7.8530

TABLE IV,'!
Arg’t. = Height.

H! + |
Metres. | Metres.
200 | 0.01
400 | 0.03
600 | 0.06
800 | 0.10
1000 | 0.16
1200 | 0.23
1400 | 0.31
1600 | 0.40
1800 | 0.51
2000 | 0.63
2200 | 0.76 ||
2400 | 0.90
2600 | 1.06
2800 | 1.23
3000 | 1.41
3200 | 1.61
3400 | 1.82
3600 | 2.04
3800 | 2.27
4000 | 2.51
4200 | 2.77
4400 | 3.04
4600 | 3.32
4800 | 3.62
5000 | 3.93
5200 | 4.25
5400 | 4.58
5600 | 4.93
5800 | 5.28
6000 | 5.65 |
6200 | 6.04 |
6400 | 6.43 |
6600 | 6.84
6800 | 7.26
7000 | 7.70
7200 | 8.14
7400 | 8.60

_

7.50

7.51
7.52
7.53
7.54
7.55

7.56
1.57
7.58
7.59
7.60

7.61
7.62
7.63
7.64
7.65

7.66
7.67
7.68
7.69
7.70

6.5
6.6
6.7
6.8
6.9
7.0
7.1
72
7.3
74
7Al
7.42
7A3
7.44
7.45
7.46
7.47
7.48
7.49

Argum’t.

BAROMETRICAL MEASUREMENT OF HEIGHTS. — PLANTAMOUR.

log. V!.

0.00014
0.00017
0.00022
0.00027
0.00034

0.00043
0.00055
0.00069
0.00087
0.00109

0.00112
0.00114
0.00117
0.00120
0.00123

0.00125
0.00128
0.00131
0.00134
0.00138

0.00141
0.00144
0.00147
0.00151
0.00154

0.00158
0.00162
0.00165
0.00169
0.00173

0.00177
0.00181
0.00186
0.00190
0.00194

0.00199
0.00204
0.00208
0.00213
0.00218

TABLE IL.
Argument = log. W. (
Argum't. log. V!.
7.70 0.00215
7.71 0.00223
7.72 0.00229
7.73 0.00234
7.74 0.00239
7.05 0.00245
7.76 0.00251
G17 0.00256
7.78 0.00262
7.79 0.00269
7.80 0.00275
7.81 0.00281
7.82 0.00288
7.83 0.00295
7.84 0.00302
7.85 0.00309
7.86 0.00316
7.87 0.00323
7.88 0.00331
7.89 0.00338
7.90 0.00346
7.91 0.00354
7.92 0.00363
7.93 0.00371
7.94 0.00380
7.95 0.00389
7.96 0.00398
1.97 0.00407
7.98 0.00417
7.99 0.00427
8.00 0.00137
8.01 0.00447
8.02 0.00457
8.03 0.00468
8.04 0.00479
8.05 0.004190
8.06 0.00502
8.07 0.00513
8.08 0.00525
8.09 0.00538

L + x!)
/BB! *

oud

Argum’t.

8.09
8.10
8.11
8.12
8.13

8.14
8.15
8.16
8.17
8.18

8.19
8.20
8.21
8.22
8.23

8.24
8.25
8.26
8.27
8.28

8.29
8.30
8.31
8.32
8.33

8.34
8.35

log. V!.

0.00538
0.00550
0.00563
0.00576
0.00590

0.00604
0.00618
0.00632
0.00647
0.00662

0.00678
0.00694
0.00710
0.00727
0.00744

0.00761
0.00779
0.00798
0.00816
0.00835

0.00855
0.00875
0.00896
0.00917
0.00939

0.00961
0.00983

mewhwm = CO

omstan an

10
11
12
13
14

15
16
17
18
19

30
31
32
33
34

35
36
37
38
39
40

Ge F log. G!. Ge

+0.00112 | 46
+0.00111 } 47
+0.00110 | 48
|
|

TABLE III.

Argument = Latitude.

+0.00114 | 40
+0.00114 | 41
+0.00114 | 42
+0.00114 }| 43
+0.00113 | 44
+0.00112 } 45
+0.00109 | 49
+0.00107 | 50
+0.00106 } 51
+0.00104 | 52
+0.00103 | 53
+0.00101 | 54
+0.00099 | 55
+0.00097 | 56
+0.00095 § 57
+0.00092 } 58
+0.00090 | 59
+0.00087 | 60

+0.00085 | 61

+0.00082 | 62
+0.00079 7 63
+0.00076 | 64
+0.00073 | 65
+0.00070 | 66
+0.00067 | 67
+0.00064 | 68
+0.00060 | 69
+0.00057 | 70
+0.00054 | 71
+0.00050 | 72
+0.00016 | 73
+0.09043 f 74
+0.00039 | 75
+0.00035 | 76
+0.00031 | 77
+0.00028 | 78
+0.00024 | 79

+0.00020 | 80

' —0.G0094

| —0.00099

—0.00012
—0.00016

log. G!.
+0.00020
+0.00016
+0,00012
+0.00008
+0.00004
0.00000
—0.00004
—0.00008
—0.00920
—0.00024
—0.00028
—0.00031
—0.00035
—0.00039
—0.00043
—0.00046
—0.00050
—0.00054

J

!

|

—0.00057
—0.00060
—0.00064
—0.00067
—0.00070

—0.00073
—0.00076
—0.00079
—0.00082
—0.00085

—0.00087
—0.00690
—0.00CS2

—9.90097

—0.00101
—0.00102
—0.00104
—0.00106

—0.00107

418

CORRECTION

FOR THE HOUR OF THE DAY AND THE SEASON OF THE YEAR AT WHICH THE
OBSERVATIONS HAVE BEEN TAKEN.

In all the preceding tables, the mean temperature of the layer of air between the

two stations 1s assumed to be given by the half-sum of the temperatures observed at
+2

t
each station, or by — 5

Experience, however, has proved that this assumption is not
true under all meteorological circumstances, and that, not to speak of more irregular
influences, the temperature expressed by a differs in ++ or — from the true mean
temperature by a quantity which considerably varies with the hour of the day, the
season of the year, and the elevation at which the observations are taken. The
amount of the correction for the temperature of the air, as given by the various
formulas, thus needs to be modified accordingly. In the absence of the data necessary
for establishing the law of the decrease of heat on the vertical in the various layers
of the atmosphere, at the different periods of the day and of the year, and in differ-
ent latitudes, which alone would furnish the means of determining the true value of
this correction in these various circumstances, the following empirical tables enable
us to form a judgment of the importance of that correction.

Tables IX. and X. are taken from Berghaus, Grundriss der Geographie, p. 91,
and in the Tables accompanying the same work, p. 71. The correction to be applied
for the hour of the day at which the observations have been taken, is found by multi-
plying the approximate height obtained by the factors in Table IX, giving to the cor-
rection the sign of the factor. This table and the following are calculated to be used
in the climate of Germany, and for elevations not much exceeding 5,000 feet. The
influence of the seasons on the correction is not taken into the account ; judging from
Table X., the correction may be, perhaps, too small for the summer months, and may
better answer for the autumn. Using these factors, we obtain for the differences of
level, in toises, placed at the head of each column, in ‘Table X., the correction cor-
responding to each hour, from 6 A. M. to 10 P. M.

SEAL Taek 5 Axe:

CORRECTION FOR THE HOUR OF THE DAY.

|
Hour. f Factor, Hour. Factor. Hour. Factor
| |
|| A.M. 6 +0.0075 || Noon. —0.0054 P.M. 5 —0.0011
| 7 +0.0050 P.M. 1 —0.0057 6 +9.0013
| 8 +0.0025 2 —0.0059 7 +0.0022
9 —0.0005 | 3 —0.0045 8 +0.0032
10 —0.0035 4 —0.0031 9 +0.0043
ll —0.0044 5 —0.0011 10 +0.0054

BAROMETRICAL MEASUREMENT OF HEIGHTS. 419
Av elubio.
CORRECTION FOR THE HOUR OF THE DAY.
ARGUMENT, THE Hour, AND THE APPROXIMATE HEIGHT IN TOISES.
| Correction, in Toises, for
| | |
Hour. 100 200 300 400 500 600 | 700 800 900 Hour.
eee BEG | Oe so | 2.29) +820" | 3.7) | 4b 5.2 l+6.0 | +6.7 6 A. M.
7 Ip teO Penal ctalle Ol Merten Matos Oleh viet Mila t-emeoin ict 4 mlieeret ey ia
8 || +0.2 | +0.5 | +0.7 | +1.0 | +1.2 | +1.5 | 41.8 | +2.0 | 42.3 8
9 -—0.0 | —0.1 | —0.1 | —0.2 | —0.2 | -0.3 | —0.3 | -—0.4 | —O.4 9
10 || —0.3 | —0.7 | -1.0 | —1.4 | —2.1 | -2.4 | -2.8 | -8.1 | -3.5 10
IL. —0.4 | —0.9 | -1.3 | —1.8 | —2.2 | -2.7 | —3.1 | -3.6 | —4.0 11
Noon. —0.5 deh | SGU 2.2 2nd | Saea "| 3.8) | ae | deg Noon.
P. M. 1 || —0.6 | —1.1 | —1.7 | —2.3 | —2.8 | —3.4'| 4.0 | -4.5 | —6.1 1P. M.
2 a0 On Ie Si 2a oO sad tel ted | Oo 2 }
3 | —0.4 | —0.9 | -—1.3 | —1.8 | —2.2 | —2.7 | -31 | -3.6 | —4.0 3
4 | —0.3 | —0.6 | —0.9 | —1.2 | -—1.5 | —1.8 | —2.1 | —2.4 | -2.7 4
5 | —0.1 | -—0.2 | —0.3 | -—0.4 | -—0.5 | —0.6 | —0.7 | —0.8 | —0.9 5
6 Onl Osan COs Ospme- Olt ie-O.oi Orme) icin 6
7 “|| 40.2 | +0.4 |' +0:7°| +0.9'| 41.1 | 41.3 | +156 | +1.8 | +2.0 7
8 | +0.3 | +0.6 | +0.9 | +1.3 | +1.6 | +1.9 | +2.2 | +2.5 | +2.9 8
9 cra or tan |ects Oe Sami mcaillecotn | meter Fan cts MON ete = Cum Mectacse Ol merase mit eh aes 9
WO. il) SOs) sete | SRG | see kee || eS ied |) epee} | eee Sh aka fs} 10

Table XI. is found in the Résumé
triques faites a Genéve et au Grand St

des Observations Thermométrique et Baromé-
. Bernard pendant les dix années 1841 a 1850,

a very elaborate paper by Professor E. Plantamour, Director of the Observatory at
Geneva, published in Vol. XIII. of the Mémoires de la Société de Physique de Genéve.
The author, after having determined the difference of elevation between Geneva
(407.0 metres above the level of the sea) and the Great St. Bernard, by means of
the corresponding observations, made during these 10 years, and using his own tables
Assuming the difference of level thus found,
2066 metres, to be the true height of the layer of air between the two stations,
and its weight being given by the barometrical observations, he deduced from these

given above, reversed the problem.
Viz.

data its mean density, and from the density its mean temperature at every even
hour in every month of the year. Comparing these mean temperatures with those
given at the same hours by the half-sum of the temperatures taken at the upper and
the lower station, he found the differences contained in Table XI., which are the cor-
rections to be applied to the half-sums of the temperatures to obtain, in this particular
case, the true mean temperatures. The second part of the table has been computed
by multiplying each temperature in the first by 7.5 metres, in order to show the value

of that correction in barometrical measurements.

D 79

420

BAROMETRICAL MEASUREMENT OF HEIGHTS.

TABLE exaie

CORRECTION TO BE APPLIED TO THE HALF-SUMS OF THE TEMPERATURES QF THE AIR,
OBSERVED AT GENEVA AND AT THE GREAT ST. BERNARD, TO OBTAIN THE TRUE
MEAN TEMPERATURE OF THE AIR BETWEEN THE TWO STATIONS.

|

Correction, in Centigrade Degrees, for
!| Hour. || Jan. Feb. | Mareh. | April. May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dee || Year. |
——- | | | | | | fi
° OApa| P2O c ° ° ° ° ° ° O) = il To oO
Noon. |. —0.5 | —1.7 | -3.0 | 8.9.) 4.1 | —4.4 | —4.4 | -3.8 | -2.7 | -1.6 | —0.4 | +0.7 |/ -2.5 |
2 || -0.2 | -1.5 | -2.8 | -3.7 | -4.0 | —4.4 | -4.4 | -3.8 | -2.6 | -1.5 | -0.2 | +0.7 || -2.3
4 || +0.4 | -0.6 | -1.6 | —2.5 | -2.7 | -3.4 | -3.6 | -2.9 | -1.7 | -0.7 | +0.4 | +1.3 |] -1.5
6 || +1.2 | +0.7 | -0.2 | -0.9 | -1.3 | -2.1 | -2.2 | -1.6 | -0.5 | +0.4 | +1.3 | +2.1 | -0.3
8 || +1.5 | +1.4/+0.6| 0.0] 0.0 | -0.6 | -0.7 | -0.5 | +0.3 | +1.3 | +1.7 | +2.6 || +0.6 |
10 || +1.7 | +1.5 | +1.2 | +0.6 | +0.7 | +0.5 | -0.1 | +0.1 | +0.8 | +1.7 | +1.8 | +2.6 || +1.1
| Mid-
| night. || +1.9 | +1.8 | +1.9 | +1.3 | +1.8 | +1.6 | +0.9 | +1.2 | +1.3 | +2.3 | +2.1 | 42.5 || +1.7 |
| 2 || +2.0 | +2.2 | +2.5 | +1.9 | +2.2 | +2.0 | 41.5 | +2.0 | +1.9 | +2.5 | +2.4 | 42.6 |] +2.2 |
| 4 || 42.3) 42.5! 42.6 | 41.8 41.7) +14) 41.1 | 41.8 | +2.1 | +2.5 | +2.7 | 42.9 || +2.1|
6 W420 142.0.) 21-7 | 20:73] 004/20. 41), 0.051O-7 pceleae leedey || 2a ero on |aes
8 || +1.5|+1.1} 0.0 | -1.3 | -2.0 | -2.2 | -2.4 | -1.7 | -0.4 | +0.6 | +1.7 | +2.5 || -0.3
10 | +0.4 | -0.4 | -2.0 | -3.1 | =8.5, |, 3.8 | —3.7 | —3.1 | —2:0 | —1.0 | +0.3 | 41.3 |/—1-7|
| | | IO
Mean, +1.2 | +0.8 | +0.1 | 0.8 | 0.9 | -1.2 | -1.5 | -0.9 | -0.2 +0.7 | 41.3 +2.1 |) 0.0
Correction, in Metres, for
| | | | | | |
| Hour. || Jan. Feb. Marebs| April. May. | June. | July. | Aug. | Sept. Oct. | Nov Dee Year.
| | | | | | weet
Noon. ||— 3.7|—12.7|—22.5 —29.2|—30.7 | 33.0 |—33.0 | 28.5 |—20.2|—12.0 — 3.0 + 5.2|/-18.7
2 | — 1.5 -11.2 -21.0 —27.7 -30.0|-33.0 -33.0 -28.5 -19.5)/-11.2 — 1.5 + 5.2 /-17.2)
4 ||+ 3.0/— 4.5|-12.0 -18.7|-20.2|-25.5 |-27.0 —21.7/—12.7/— 5.2 + 3.0 + 9.7//-11.2
g ||+ 9.0|+ 5.2|— 1.5)— 6.7|— 9.7|=15.7|—16.5 |—-12.0|— 3.7|+ 3.0/+ 9.7 +15.7|-— 2.2]
g ||+11-2/+10.5|+ 4.5) 0.0 0.0|—-4.5|— 5.2/— 3.7)+ 2.2/+ 9.7/412.7 +19.5|/+ 4.5
10 |+12-7/+11.2)+ 9.0) + 4.5|+ 5.2) + 38.7|- 0.7, + 0.7 + 6.0/+12.7 +13.5 +19.5//+ 8.5)
ee ll | | |
night, | $14.5 +13.5 414.5 + 9.7/+13.5 #12.0/+ 6.7 + 9.0)+ 9.7] 417.2 +15.7 +18.7//+12.7|
2 | 4+15.0/+16.5/+18.7 +14.2 4+16.5/+15.0/+11.2 +15.0)+14.2/+18.7 +18.0 +19.5 |/+16.5
4 | +17.2)418.7/+19.5 +13.5 4+12.7/+10.5/+ 8.2 +13.5/+15.7 +18.7 +20.2 +21.7)+15.7)
G [+15.0|+15.0)/+12.7)+ 5.2/+ 3.0|+ 0.7| 0.0)+ 5.2/+11-2)+12.7/+17.2|+21.7|+ 9.7|
8 |+11.2|+ 8.2) 0.0 — 9.7|-15.0|-16.5 |—18.0 |—12.7|— 3.0) + 4.5 +12.7/+18.7|— 2.2|
10 ||+ 3.0|/— 3.0 —-15.0 23.2 26.2 |-28.5 |-27.7 —23.2 wae 7.5|+ 2.2|+ 9.7||-12.7
rn ia ea | ae
‘Mean,| +9.0 | +6.0 +0.7 —6.0 | —6.7 | —9.0 =e) —6.7 | -1.5 | +5.2 | +9.7 415.7 0.0
| | t |

D

80

se.

BAROMETRICAL MEASUREMENT OF HEIGHTS. 491

Tue elevation of a place in the interior of a continent where regular meteorological
observations are made, may be ascertained by taking the yearly means of the ba-
rometer reduced to the freezing point, and of the temperature of the air, as data for
the upper station, and the yearly means of the reduced barometer and of the free
thermometer at the level of the sea, as the data for the lower station. The Hypso-
metric Tables then will give the difference of level. As observation, however, has
shown that the mean height of the barometer at the level of the sea is not the same
in all latitudes, it is necessary to take for such a comparison the mean height of the
barometer which belongs to the latitude of the station the elevation of which is to be
computed, or that which is nearest to it.

Table XII., published by Schouw, in Poggendorf’s Annalen, and in the Comptes
Rendus de Académie des Sciences, Tom. ILL. p. 573, gives in Paris lines the mean
height of the barometer in various latitudes. The reduction into millimetres is
from Martins’s French translation of Kaemtz’s Meteorology, p. 278 ; the correspond-
ing values in English inches, and the new stations, Savannah, Ga., Philadelphia, Pa.,
and Cambridge, Mass., have been added. ‘The mean heights last mentioned have
been derived from three years of observations at Savannah, by Dr. John F. Posey,
from June, 1853, to June, 1856, published in the American Almanac; from four
years of hourly observations at Girard College, Philadelphia, by Prof. A. D. Bache ;
and from ten years of observations at Cambridge Observatory. ‘They have been
reduced to a common absolute standard and to mean tide-water at the respective
places.

These mean barometric heights, corrected for the variation of gravity in latitude,
according to the proposition of Poggendorf, by the formula 6 = 6 45 (1 — 0.0025935
cos 2), where db is the height of the barometer in latitude ¢, and 4 45 the corre-
sponding height at the forty-fifth degree of latitude, are found in another column.
For computing the elevations, the uncorrected heights are to be used.

The mean barometric pressure, as shown by Table XIIL from Kaemtz’s Précis de
Météorologie, French translation, p. 281, is not the same in all seasons, and the
monthly means differ by a quantity which also varies with the latitude. If, therefore,
the height of an inland station is to be ascertained from the barometrical means of
one or more months only, the computation must be made with the mean pressure in
the corresponding months at the level of the sea; or if this is not known, the yearly
means taken from Table XII. must be corrected for the difference between the monthly
means of the given month, or months, and the annual mean in the same latitude, as
derived from the comparison of the numbers in Table XIII.

Example.

Suppose an inland station, in latitude 40° N.; the mean barometric pressure for
July is 26.30 inches, and its elevation is to be computed from it.

Table XII. gives for latitude 40°, at Philadelphia, reduced to the level of the sea,
30.053 inches. Table XIII. gives as the mean for July, at the same place, 759.80
millimetres, and for the year, 760.25 miliimetres (both not reduced to the levet of
the sea), difference — 0.45 millimetres = — 0.017 English inches, which is to be
subtracted from the annual mean, 30.053, to reduce it to the mean of July ; or

D 81

422 BAROMETRICAL MEASUREMENT OF HEIGHTS.

30.053 — 0.017 — 30.036. This last number is to be used in the computation,
with the mean temperature of July at both stations.

Towards the tropical regions, the irregular or non-periodic variations of the ba-
rometer, which in high and middle latitudes are so considerable as to render simul-
taneous observations indispensable for the measurement of heights, gradually decrease
and nearly cease to exist, while the monthly and daily periodic variations, which are
small in high latitudes, considerably increase. Within the tropics, therefore, the
oscillations of the barometer being far more uniform, observations made during a
short period of time, or even single observations, may be used for computing heights,
without corresponding observations, by referring them to the mean pressure at the
level of the sea as to a constant, provided this last has been corrected for the monthly
and daily periodic variation at the place.

Table XIII. furnishes the means of applying the correction for the monthly varia-
tion, as described above. ‘Table XIV., which gives the mean height of the barometer
at all hours of the day in various latitudes, enables the observer to correct the data
according to the hour at which the observations have been taken. This table is
from Kaemtz’s Vorlesungen uber Meteorologie, French translation, p. 249. The
column Bossekop is from the observations of the French Scientific Expedition in the
North; the column Philadelphia, from the observations at Girard College, has been
added.

The correction for the hourly variation is found by taking the difference between
the mean of the hour of observation and the daily mean, and correcting accordingly,
with due regard to the signs, either the yearly mean at the sea level, or the observa-
tion at the upper station.

Example.

The barometer at Caracas, latitude 10° 30’ N., on the 20th of August, at 4 o’clock
P. M., reads 680.57 millimetres.

In Table XII. the mean height of the barometer at
La Guayra, lat. 10° N. “ : ;
By Table XIII. we find for aise a correction

I

760.17 millimetres,

=— 2.95
Mean barometer in August : — 757.22
In Table XIV. daily mean — mean at 4 P. M. gives ie
4 P. M. a correction ; : : ‘ 2 : cp eT
Mean barometer at La Guayra in August, at 4 P. M. — 756.05 millimetres,

which is the number to be used for the computation of the height of Caracas. In
this case, however, the monthly correction, being derived from a higher latitude, may
be too small. Both corrections can of course be applied, with contrary signs, to the
observation at Caracas, leaving then the mean height at the level of the sea as a
constant.

D 82

423
TAB a Ot

MEAN HEIGHT OF THE BAROMETER,

IN VARIOUS LATITUDES, REDUCED TO THE LEVEL OF THE SEA, AND TO THE
FREEZING POINT.

| In Millimetres In English Inches. In Paris Lines.

Places. Latitude. | | Corrected Corrected Corrected
| Observed. Gear: Observed. Giavity. Observed. Grasity:

|

ey | |

Cape of Good Hope, 33 s.|| 763.01 | 762.20 | 30.041 | 30.008 | 338.24 | 337.88
| Rio Janeiro, Brazil, 23s. || _ 761.03 | 762.65 | 30.080 | 30.026 | 338.69 | 338.08
| Christiansborg, Guinea, | 5 30N. 760.10 | 758.16 | 29.925 | 29.850 | 336.95 | 336.09
_ La Guayra, Venezuela, | 10 760.17 | 758.32 | 29.928 | 29.855 | 336.98 | 336.16
| St. Thomas, W. Indies, | 19 760.51 | 758.95 | 29.942 | 29.881 | 837.13 | 336.44
_ Macao, China, 23 762.99 | 761.61 | 30.010 | 29.986 | 338.23 | 337.62
| Teneriffe, Canary Isles, | 28 | 764.21 | 763.10 | 30.087 | 30.044 | 338.77 | 338.28
Savannah, Georgia, 32 761.59 | 763.74 ] 30.102 | 30.070 | 338.93 | 338.57
| Funchal, Madeira, 32 30 765.18 | 764.34 | 30.126 | 30.093 | 339.20 | 338.83
Tripoli, Northern Africa,| 33 767.41 | 766.60 | 30.214 | 30.182 | 340.19 | 339.83
| Palermo, Sicily, 38 762.95 | 762.47 | 30.038 | 30.019 | 338.21 | 338.00
| Philadelphia, Penn. 40 763.35 | 763.00 | 30:053 | 30.010 | 338.38 | 338.23
_ Naples, Italy, 41 762.34 | 762.06 | 30.014 | 30.003 | 337.94 | 337.82
| Cambridge, Mass. 42 762.44 | 762.24 | 30.018 | 30.010 }| 337.99 | 337.90
| Florence, Italy, 43 30 761.93 | 761.81 | 29.997 | 29.993 | 337.76 | 337.71
Avignon, France, 44 762.02 | 761.95 | 30.001 | 29.998 | 337.80 | 337.77
Bologna, Italy, 44 30 762.18 | 762.13 | 30.007 | 30.005 | 337.87 | 337.85
Padua, Italy, 45 762.18 | 762.18 | 30.007 | 30.007 | 337.87 | 337.87
Paris, France, 49 || 761.41 | 761.68 | 29.973 | 29.988 | 337.53 | 337.65
| London, England, 5130 || 760.96 | 761.41 | 29.960 | 29.978 | 337.33 | 337.53
| Altona, Denmark, 53 30 || 760.42 | 761.01 | 29.938 | 29.961 | 337.09 | 337.35
| Dantzig, Prussia, 54 30 760.10 | 760.76 | 29.925 | 29.952 | 336.95 | 337.24
Konigsberg, Prussia, 54 30 760.19 | 761.14 | 29.941 | 29.967 | 337.12 | 337.41
Apenrade, Denmark, 55 | 759.58 | 760.71 | 29.906 | 29.950 | 336.72 | 337.22
Edinburgh, Scotland, | 56 758.25 | 759.00 | 29.853 | 29.882 | 336.13 | 336.46
Christiania, Norway, 60 758.64 | 759.63 | 29.868 | 29.908 | 336.30 | 336.74
Hardanger, Norway, 60 756.91 | 757.04 | 29.801 | 29.841 | 335.55 | 335.99
Bergen, Norway, 60 757.01 | 758.00 | 29.804 | 29.844 | 335.58 | 336.02
Reikiavig, Iceland, 64 752.00 | 753.20 | 29.607 | 29.654 | 333.36 | 333.89
Godthaab, S. Greenland,) 64 751.94 | 753.13 | 29.605 | 29.651 | 333.33 | 333.86.
Eyafiord, Iceland, 66 753.58 | 754.89 | 29.669 | 29.721 | 334.06 | 334.64
Godhayn, Disco, Greenl. | 68 753.76 | 755.16 | 29.677 | 29.731 | 334.14 | 334.76
Upernavik, N. Greenl. | 73 755.18 | 756.80 | 29.732 | 29.796 | 334.77 | 335.49
Melville Isl., Arct. Amer.) 74 30 157.08 | 758.75 | 29.807 | 29.872 | 335.61 | 336.35
Spitzbergen, 73.30 || 736.76 | 758.48 | 29.794 | 29.862 | 335.17 | 336.23

D 83

424
XIII. MEAN HEIGHT OF THE BAROMETER, IN ALL MONTHS OF THE YEAR, IN
VARIOUS LATITUDES.

Not reduced to the Level of the Sea.

!
Places, Havana. en Macao Carmo. 1 eee uae sees Pants. ee |
Tatitude,| 93° 9! | 29° 33! | 9997]1'| 30°39! | 32°05)! | 39°58! | 42° 93! | 48° 50! | 59° 56’ |
ae se | ee ee Ee
Jan. 765.24 | 764.57 767-93 | 762.40-| 762.80 | 760.97 | 761.37 | 758.86 | 762.54
Feb. 760.15 | 758-S6 767.01 ss 763.76 759.63 760.90 759.09 763.10 |
March, | 760.98 756.24 766.08 759.43 763.05 | 760.51 | 759.09 | 756.33 | 760.76
April, | 759.58 753.83 761.93 760.10 763.10 760.05 759.37 | 755.18 | 761.19 |
May, 758-19 | 750.81 761.64 | 758.23 763.39 | 759.09 | 759.63 | 755.61 | 760.94 ||
June, 760.67 | 748.10 | 757-31 | 754.42 | 764.37 | 759.22 | 758.91 | 757.28 | 759.83 ||
July, 760.67 | 747-54 | 757.91 | 753.90 | 764.02 | 759.80 | 760.34 | 756.52 | 758.25 ||
Aug. 757.33 | 748.53 | 757-91 | 754.06 | 765.54 | 760.54 | 761.11 | 756.74 | 759.94 |
Sept. 737.46 | 751.83 | 762.22 | 756.70 | 763.36 | 761.25 | 761.83 | 756.61 | 761.19 |
Oct. 738.19 | 755.25 | 763.37 | 759.70 | 763.13 | 760.68 | 761.07 | 754.42 | 760.82 ||
Noy. 761.25 | 758-37 | 766.17 | 760.76 | 763.41 | 760.49 | 760.85 | 755.75 | 758.05 ||
Dec. 763.62 760.59 768.65 | 761.82 | 761.12 760.82 | 760.80 | 755.09 | 760.22 |
Year, 760.28 | 734.54 | 763.18 | 758.32 | 763.41 | 760.25 | 760.44 | 756.46 760.57

XIV. MEAN HEIGHT OF THE BAROMETER, AT ALL HOURS OF THE DAY, IN
VARIOUS LATITUDES.
Not reduced to the Level of the Sea.

places, |) BectTte | Comaza.| guvtas | cose [mane | Papua. | Hae |,Eioune |Bosseeor.
Latitude. 0° 0’ 10° 28/N. 10° 36/N. 22° 35/N. 39° 58'N. 45° 24'N. 51° 29'N. 59° 56/N. 69° 58'N.
Observers. - Horner. ai ee Balfour Bache Ciminello. Kaemtz Kupffer. Bravais.
i, na Millim. Millim. Millim. Millim. Millim. Millim Millim. Millim. Millim.
Midnight, 752-47 756-86 759.64 755.80 760-49 757.01 | 753.23 | 759.35 754.90
1 752.20 | 756.53 | 759.34 | 758.62 | 760.46 | 756.90 | 753.14 | ‘“* | ‘“
2 751.77 | 756.21 | 759.05 | 758.57 | 760.41 | 756.84 | 753.05 | 759.32 | 754.79
3 751.63 | 755.89 | 758.81 | 758.49 | 760.34 | 756.78 | 752.99 Sori) shests
4 751.32 | 755.66 | 758.68 | 758.47 | 760.39 | 756.74 | 752.99 | 759.32 | 754.70
5 751.65 | 755-79 | 758.85 | 758.44 760.49 | 756.75 | 753.34 sf cE
6 731.95 756.18 759.32 758.68 760.75 756.79 | 753.12 | 759.39 | 754.68 |
7 752.48 | 756.58 | 759.94 | 759.16 | 761.00 | 756.89 | 753.24 e 3
8 732.95 | 738.98 | 760.50 | 759.88 | 761.15 | 757.01 | 753.37 | 759.49 | 754.75 |}
| 9 753-16 | 757.31 | 759.63 | 760.11 | 761.22 | 757.08 |. 753.44 SET Fal WeKse
10 753.15 | 757.32 | 760.50 | 760.19 | 761.17 | 757.14 | 753-46 | 759.51 | 754.96 |
11 752-80 | 757.01 | 759.99 | 760.09 | 760.97 | 757.07 | 753.40 | “* | “ |
Noon, | 752.35 | 756.57 | 759-41 | 759.61 | 760.56 | 757.02 | 753.29 | 759.47 | 755.01 |
1 751.87 | 755.99 | 758.91 | 759.22 | 760.13 | 756.85 | 753-11 | ‘“S | “© |
2 751.55 | 755.47 | 758-41 | 758.39 | 759.83 | 756.67 | 752.99 | 759.38 754.96 |
3 751-15 | 735.14 | 758-12 | 758.12 | 759.65 | 756.54 | 752.89 | © | |
4 751.02 | 754.96 | 758.05 | 757.91 | 759.65 | 756.47 | 753.84 | 759.32 | 754.82 —
5. || 751.81 | 733.14 | 753.10 | 737.93 | 759.70 | 756-46 | 752.86 | “- | |
6 751-71 | 753.41 | 753-40 | 758.01 | 759.85 | 756.50 | 752.91 | 759.31 | 754.87 |
7 751.93 | 755.81 | 758.90 | 758.02 | 760.08 | 756.63 | 753.02 cl eee
8 752.35 | 756.21 | 759.19 | 758.54 | 760.31 | 756.79 | 753.14 | 759.32 | 754.89 |;
9 752.74 | 756.59 | 759.69 | 759.24 | 760.49 | 756.92 | 753.24] “© | “ |
10 752.83 | 756.87 | 739.93 | 759.33 | 760.59 | 757.02 | 753.31 | 759.36 | 754.92 |
11 452.56 | 757.15 | 759.98 | 759.09 | 760.72 | 757.02 | 753.29| “ | « |
sole eer =
| Mean, | 752.13 | 756.33 | 759.22 | 758.87 760.43 | 756.83 | 753.19 | 759.38 | 754.85

v
ie

* pated * a

BAROMETRICAL MEASUREMENT OF HEIGHTS. 495

Taste XIV. shows that, after all irregular variations of the barometer have been
eliminated, there remains a double period of rise and fall within the twenty-four
hours, and that the amplitude of these daily oscillations is greatest within the tropics,
and goes on diminishing towards the polar regions.

According to Kaemtz, the mean time of the daily maxima and minima, or the
mean tropic hours for the northern hemisphere, are as follows : —

The minimum of the afternoon is reached at 4.05 P. M.
The maximum of the evening is reached at 10.11 P.M.
The minimum of the night is reached at 3.45 A. M.
The maximum of the morning is reached at 9.37 A. M.

Even in temperate and high latitudes these diurnal variations, though small, must be
taken into account, if great accuracy is required, in reducing corresponding obser-
vations made at a somewhat different hour to the time of the observation at the
station the height of which is to be determined. But in so doing, it must be remem-
bered that the times of the minima and maxima change with the seasons, as is shown

by Table XV. from Kaemtz, p. 251 of the French translation.

XV. TROPIC HOURS OF THE DAILY VARIATION OF THE BAROMETER AT HALLE.
LAT. 51° 30/ N.

Se tanth: a Maximum, Minimum, Maximum, | Month. Minimum, Maximum. Minimum, Maximum,

i] Pp. M. A. M. A. M. P. M. P Mz A. M. A M.
h. fe iis h. h. esses itn hare:

|, Jan. 2.81 |. 9.17] 4.91 9.91 | July, 5.21 | 11.04 | 3.04 | 8.73
| Feb. 3.43 | 9.46 3.36 9.66 | Aug. 4.86 10.66 3.06 8.96
| March, } 3-82 | _9.80 3.87 10.10 } Sept. 4.55 10.45 3.45 | 9.71
| April, 4.46 | 10.27 3.53 9.53 || Oct. 4.17 | 10.24 | 3.97 | 10.07
| May, 5.43 10.93 3.03 9.13 || Nov. 3.52 9.85 4.68 10.08
|) June, | 5.20 | 10.93 | 2.83 | 8.73 || Dec. 3.15 | 9.11 | 4.91 | 10.18

This shifting of the times of maxima and minima with the seasons diminishes with
the latitude, and tends to disappear towards the equator, with the inequality of the
days and nights. The elevation above the level of the sea also causes a change in
the tropic hours of the daily variation which is not yet sufficiently studied.

Table XIV. gives evidence that the amplitude of the hourly oscillation is greatest
under the equator, and gradually decreases towards the pole. Kaemtz computes its
mean value in various latitudes and at the level of the sea, as follows : —

xv’. AMPLITUDE OF DAILY VARIATIONS IN VARIOUS LATITUDES.
ij == |

i Latitude | Variation. Latitude. | Variation | Latitude. Variation | Latitude Variation. H
Hl sae Millim. o , | Milim. | ae Millim. | 5 a Millim. |}
ee 00) | 2.28 235 | 180 | 39 4 | 113 || 5283 | 045 |
i dD 26N. 2.26 = || 29 28 1.58 43 34 0.90 | naa 0.23 |

52 DOF oy POA Ohne Resor 48. ols) he 8068 62 25 0.00 ||

The amplitude also decreases with the elevation, at least in our latitudes ; it was
found to be on the Faulhorn, in Switzerland, 9000 feet above the sea level,
0.27 millimetres, while it was 0.90 millimetres at Geneva.

D 89

426 TABLES

FOR REDUCING BAROMETRICAL OBSERVATIONS TO THE LEVEL OF THE SEA, OR TO
ANOTHER LEVEL.

To reduce barometric means taken at a given elevation to the height they would
have if taken at the level of the sea, or barometric observations made at different
elevations to a common level, in order to eliminate the influence of altitude in the
comparison of barometric pressures, is a problem, the solution of which is often
needed in meteorology.

For a complete and accurate reduction, embracing all cases, Tables 1V. and V.,
by Dippe, given above, pages 54 et seq., may be: used. But when the difference of
height between the two stations, or above the sea-level, does not exceed a few
hundred feet, the small tables XVI. to XIX., in three different scales, will be found
more convenient.

Tables XVI. and XVII. have been computed from the constants of Laplace’s for-
mula, the barometric coefficient, including the correction for the decrease of gravity
ona vertical, being respectively 60,345.51 English feet and 56,621.83 Paris feet ;
and the coefficient for expansion of moist air 0.00222 and 0.005,

In Table XVIII. the coefficient 18,420 metres, deduced from Regnault’s experi-
ments (see Proceedings of the Amer. Assoc. for Adv. of Science, 1857), and his co-
efficient for expansion of dry air, 0.003665, increased to 0.0039, in order to include
the effect of moisture, have been used.

Use oF THE TABLEs.

The correction for reducing the barometer to the level of the sea is found by the

formula te
d
Noun
where C is the correction required ; f, the elevation of the station ; N, the number
in the tables; h’, the reading of the barometer; A, the normal height of barometer

Cr—

at the sea-level.
Example.

At Cambridge Observatory, Massachusetts, at 71.34 English feet above mean tide,
the mean barometer is = 29.939 inches ; the mean temperature 47°.8 Fahrenheit ;
what would be the height at the level of the sea ?

In Table XVI. we take for 47°.3 = 90.49, or, in order to get the correction ina
fraction of an inch, 904.9.

Then

71.34 29.939 ; ; ;
—,-— == 0.079, correction required ;

C= jongae es 20

and
29.939 + 0.079 =: 30.018 inches, height of the barometer at the level of the sea.
It will be seen that the quantity represented by the second member can be neg-

lected without causing a sensible error in the correction. Jn this case the error does
not amount to .0O1 ; it scarcely would reach .002 for 250 feet of elevation ; so that

the reduction can be made in most cases by a simple division ; viz. <.

N
D 86

427

XVI. HEIGHT, IN ENGLISH FEET, OF A COLUMN OF AIR CORRESPONDING TO A TENTH OF
AN ENGLISH 1NCH 1N THE BAROMETER, AT TEMPERATURES BETWEEN
32° AND 100° FAHRENHEIT,
The Barometric Pressure at the Lower Station being = 30 English Inches.
plan oa sore fea ti aoe eee il tet
Temper- Height Temper- | Height || Temper- Height Temper- | Height || Temper- | Height
ature of | in | ature of in ature of in ature of in || ature of in.
Air, English Air, English Air, English Air, English | Air, English
| Fahren Feet. Fahren. Feet. Fahren. Feet. Fahren. Feet. Fahren. Feet.
32° | 87.51 46° | 90.23 GO | 92:95 |) 74° | 95:67 || 87° | 98.20
33 87.70 47 90.42 61 93.15 || 75 95.87. | 88 98.40
34 87.90 48 90.62 62 93.34 76 96.06 || 89 98.59
35 88.09 49 90.81 63 93.53 77 96.26 | 90 98.79
36 88.238 50 91.01 64 93.73 73 96.45 | 91 98.88
37 83.48 51 91.20 65 93.92 io, 96.65 | 92 997
38 83.67 52 91.40 66 94.12 50 96.84 93 99.37
39 &3.87 53 91-59) || 67 94.31 81 97.04 94 99.56
40 89.06 || 54 91.78 || 68 91.51 82 97.28 95 99.76
Al 89.26 55 91.98 69 91.70 $3 97.42 — 96 99.95
42 89.45 || 56 92.17 70 94.90 || 84 97.62 97 | 100.15
43 89.65 | 57 92.37 71 95.09 85 97.81 98 100.34
44 89.84 | 58 92.56 72 95.29 56 98.01 99 100.54
45 90.03 | 59 * 92.76 73 95.48 87 98.20 100 100.73
XVII. HEIGHT, IN FRENCH FEET, OF A COLUMN OF AIR CORRESPONDING TO
A PARIS LINE IN THE BAROMETER, AT TEMPERATURES OF THE AIR
BETWEEN 0° AND 34° REAUMUR,
The Barometric Pressure at the Lower Station being = 387 Paris Lines.
Tem per- Height Temper- | Height | Temper- | Height | Temper- | Height Tem per- | Height
ature of in || ature of in | ature of in | ature of in ‘| ature of | in
Air, French | Air, French || Air French || _ Air, French || Air, French
Reaumur. Feet. Reaumur Feet. ERS Feet. Reaumur. Feet. Reaumur.| Feet
0° 73.08 | To lesFSGor ll qokdos | wero Pie elena 28° | 83.31
i 73.44 | 8 76.00 | 15 78.56 | 22 81.11 29 83.67
2 Texel || 9 76.36 16 78.92 23 §1.48 30 84.04
3 TAT 10 76.73 aa Ono) 24 81.85 31 84.40
4 7A54 il 77.10 18 79.65 25 82.21 382 84.77
5 74:90 |) ° 12 77.46 19 80.02 || 26 82.58. ||! 933 85.13
6 15-27 | et13 77.83 20 80.38 || 27 82.94 |||. 34 85.50
XVIII. HEIGHT, IN METRES, OF A COLUMN OF AIR CORRESPONDING TO A.
MILLIMETRE IN THE BAROMETER, AT TEMPERATURES BETWEEN
0° AND 39° CENTIGRADE,
The Barometric Pressure at the Lower Station being = 76) Millimetres.
| | | \| |
stare of | Height ane oF Height abate of | Height | ai ot Height aire of Height
centigr | Metres | centige. | Mettes- |i centizn. | Metres |) centign | Metres: || centige, | Metres.
0° 10.54 | 8° | 10.86 16° L1.49) [lh BASSE WT-52 B29 | iiiies
1 10.58 | 9 10.91 | 17 11.23 | 25 11.56 | 33 11.89
2 10.62 | 10 10.95 || 18 11.28 | 26 11.60 || 34 11.93
3 10.66 Il 10.99 19 11.32 | uel 11.64 35 11.97
4 10.70 12 11.03 20 11.36 | 28 11.69 36 12.01
5 10.74 | 13 11.07 21 11.40 29 11.73 37 12.06
6 10.78 | 14 ENTS: 22 11.44 | 30 Ma 38 12.1
7 10.82 | 15 11.15 23 11.48 | 31 11.81 || 39 Let
D 87

428 BAROMETRICAL MEASUREMENT OF HEIGHTS.

Table XIX. gives, in metrical measure, the values of a millimetre in the barom-
eter at different elevations and Centigrade temperatures. ‘The values are derived
from Laplace’s constants, as in Tables XVI. and XVII.

This table may be used, as the preceding ones, for reducing barometrical obser-
vations to the level of the sea, and also to any other level by a similar process.

Example.

Suppose the barometer to read 700 millimetres at the altitude of 750 metres, the
temperature of air being = 16° Centigrade ; what would be the reading at a station
lower by 350 metres, assuming the temperature of the air downwards to increase at
the rate of 1° Centigrade for 185 metres ?

The temperature of air at lower station will be 16° + 1°.9 = 17°.9

The approximate height of barometer about 73 centimetres.

Then, in Table XIX. we find for 16° and 70 centimetres, 12.15 -

‘“ “ “ for 17°.9 and 73 centimetres, 11.73
Mean 11.94
And
ie = 29.31, or barometer at lower station 700 ++ 29.31 = 729.31 millimetres.

Deleros’s tables, with these data, would give for the difference of level 349.76,
instead of 350 metres; the corresponding error in the height of the barometrical
column does not exceed 0.08 millimetre, and thus remains within the limits of error
which may be expected in an ordinary observation.

The principal object of this table, however, is to furnish the scientific traveller
with the means of readily computing on the spot approximate differences of level,
by simply multiplying the difference between the readings of the barometer at each
station by the half sum of the numbers in the table corresponding to the data given
Ly the observations.

Example.

Suppose the barometer at the lower station to read 732.5, and at the upper station
703.2 millimetres ; the temperature of the air being respectively 18° and 16° Centi-
grade.

The difference of the barometers, supposed to be reduced to the saine temperature,
-is 29.3 millimetres.

Then, Table XIX. gives for 18° Centigrade and 73 centimetres, 11.73

ss cs for 16° Centigrade and 70 centimetres, 12.15
Half sum, or mean, 11.94

And, 29.3 & 11.94 = 349.8 metres = difference of Jevel required.

By the large tables of Delcros, we find for the same data 350.1 metres.

This table can be considered as a complement to Delcros’s tables, and may save
the traveller the trouble of carrying the larger tables.

A similar table in English measures is found above, at the end of the author’s
larger tables (Table VI.), page 48 of this series, and another, more extensive one,
below, page 92, the use of which is explained by the examples just given.

D 88

429
XIx HEIGHT, IN METRES, OF A COLUMN OF AIR, CORRESPONDING TO A MILLIMETRE
IN THE BAROMETER, AT DIFFERENT TEMPERATURES AND ELEVATIONS.

— =

Temper- | Barometer at the Lower Station, Reading in Centimetres.
| ature of |

cent. | yg | 75 | va | va | v2 | 71 | vo | 69 | 68 | 67

| o || Metres. | Metres | Metres. | Metres. | Metres [| Metres. | Metres. | Metres. | Metres. | Metres.
0 10.52 10.66 10.80 10.94 11.10 | 11.26 11.42 11.59 11.75 11.93
2 10.60 10.74 10.89 | 11.03 TTS 11.35 | 11.51 11.68 11.85 12.03
4 10.69 10.83 10.97 11-32 11.28 11.44 11.60 11.77 11.94 12.13
6 10.77 10.91 11.06 11.20 11.37 11.53 | 11-69 11.86 12.04 12.22
8 10.85 11.00 11.15 11.29 11.46 11.62 11.78 11.96 12.13 12-32 |}

| 10 | 10.94 TACOS | is23e) ISS oom all iene eS a Ober 222 2.41
Pet | t'02 elles ee Cds Con OOM peli Om mela ela o) | Meo
te) | eit 11.25 | 11.41 L555) WI 2e SON) 206s | 223) | 1241 2.60 ||

PVT | 12.34" | NEKO! | 1164 1-81 1911-98 255s | 12.38) |) 2251 | 12-70
Pe Sh. dt 1b 43) 08:58) |) E73) TA-O0 st 122070) 2524s | 1) F12760) || 12279) |)
| | | | |
} 20- |) 11-36 | 11.5) | 17.67") 11.82) | -11:99"]) 12.16) | 12:33) | 12:51 | 12.69 | 12.89
22) PLE 1E-GO0) Uezoe |) 11-90) | 122080 Ir 12.25) 12ht22 | 1226 || 212279) | 12.99

_
SD

|} 24 || a1.68 | 11.68 | 11.84-| 11.99 | 12.17 | 12.34 | 12:51 | 12.70 | \12.88 | 13.08 ||
Pe) iter |) ii-77 2) 19.93" |, £2:08' ||) 12-26! JP 12.48 | 12.61! | 12:79 | 12:98 | 18.718) |
| 28 |! 11-70 | 11.85 | 12.01 | 12.17 | 12.35 | 12.52 | 12.70 | 12.88 | 13.07 | 13.27 ||
|
| ;

BON Ub. 78 |. 11-944) 12210" | 12.25: \12243h12.6L" | j19¢790) | (1298) | MSte || 13:37
fee32 1 m0.86" |* 12:02)')) 12:18; |; 19.84. |. 12!52° |) 412-70") 42188.) 18.07, | 13:26 | 18.46

bo
w

34 || 11.95 1250 |) 12.27 2 12.61 | 12.79 | 12.97 | 13.16 | 13.35 | 13.56
12.03 12.19 | 12.36 | 12.52 | 12.70 | 12.88 | 13.06 | 13.25 | 13.45 | 13.65

| 36 ||
| 38 | 12.12 12.28 | 12.44 | 12.60 | 12.79 | 12:97 | 13.15 | 138.385 | 13.54 | 13.75
| Temper- Barometer in Centimetres.
| ature of ae = =
Air,

Centig. || 66 65 64 63 G2 GI 60 39 38 o7

Metres Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres.
Po 12.30 12.49 12.69 12.89 13.10 13.32 13.55 13.78 14.03
12.21 12.40 12.59 12.79 13.00 13.21 13.43 13.66 13.89 34.14
12.31 12.50 12.69 12.89 13.10 13-31 13.54 13.77 14.00 14.25
12.40 12.60 12.79 13.00 13.20 13.42 13.64 13.88 14.11 14.36
12.50 12.69 12.89 13.10 13.31 13.52 13.75 13.98 14.22 14.47

anne moo

10 12.60 | 12.79 | 12.99 | 13.20 | 13.41 | 13.63 | 13.86 | 14.09 | 14.34 | 14.59
12 12.69 | 12.89 | 13.09 | 13.30 | 13.51 | 13.73 | 18.96 | 14.20 | 14.45 | 14.70
14 12.79 | 12.99 | 13.19 | 18.40 | 13.62 | 13.84 | 14.07 | 14.31 14.56 | 14.81
16 12.89 | 13.09 | 13.29 | 1350 | 13.72 | 13-94 | 14.18 | 14.42 | 14.67 | 14.92
18 12.98 | 13.19 | 13.39 | 13.61 | 18.82 | 14.05 | 14.28 | 14.53 | 14.78 | 15.04

20 13.08 | 13.28 | 13.49 | 13.71 | 13.93 | 14.15 | 14.39 | 14.63 14.89 | 15.15
22 13.18 | 13.38 | 13.59 | 13.81 | 14.03 | 14.26 | 14.50 | 14.74 15.00 | 15.26
| 24 13.27 | 13.48] 13-69 || 13.91) | 14.13 | 14.36 | 14:60 | 14-85 | 15.11 | 15-37
26 13.37 | 13.58 | 13.79 | 14.01 | 14.24 | 14.47 | 14.71 | 14.96 15.22 | 15.48
28 13.47 | 13.68 | 13.89 | 14.11 | 14.34 ] 14.57 | 14.82 | 15.07 15.33 | 15.60

| 30 13.57 | 13.78 | 13.99 | 14.22 | 14.44 J 14.68 | 14.92 | 15.18 | 15.44 | 15.71
je 32 13.66 | 13.87 | 14.09 | 14.32 | 14.55 \ 14.78 | 15.03 | 15.28 | 15.55 | 15.82
34 13.76 | 13.97 | 14.19 | 14.44 | 14.65 | 34.89 | 15.14 | 15.39 | 15.66 | 15.93

13.86 | 14.07 | 14.29 | 14.52 | 14.75 | 114-99 | 15.24 | 15.50 | 15.77 | 16.05

D : 89

a

30
XOX HEIGHT, IN ENGLISH FEET, OF A COLUMN OF AIR, CORRESPONDING TO A TENTH
OF AN INCH IN THE BAROMETER, AT DIFFERENT TEMPERATURES AND ELEVATIONS.

| Temperature of the Air, Fahrenheit, being |

Barometer |
Reading in| ) a i
English a0 | 45° | 50° | 55° | 60° | 65°} 700 75° 80° 85° 90° 95°
| | |
2.0 || 121.5 | 122.8 | 124.2 | 125.5! 126.8 | 128.2] 129.5 | 130.8) 132.1 | 138.5 | 134.8 | 136.1
22.2 || 120.4 | 121.7] 123.1 | 124 4| 125.7 | 127.0] 128.3] 129.6 130.9 132.2 138.6 | 134.9
2 119.3 | 120.6 | 121.9 | 123.2) 124.6 | 125.9] 127.2) 128.5 129.8 131.1 | 132.4 | 133.7
22.6 || 118.2 | 119.5 | 120.8 | 122.1/ 123.4 | 124.7] 126.0 | 127.3. 128.6 129.9 | 131.2 | 182.4
22.8 117.2 118.5 | 119.8 121.1 122.3 | 123.6] 124.9 | 126.2 127.5 128.8 | 130.0 | 131.3
|
23.0 || 116.2 | 117.5 | 118.7] 120.0| 121.3 | 122.6] 123.8 ineal quae ee ane 130.2
23.2 |) 115.2 116.5 | 117.7] 119.0| 120.2 | 121.5] 122.7| 124.0, 125.3. 126.5 | 127.8 | 129.0
23.4- || 114.2 | 115.5 | 116.7 | 118.0 | 119.2 | 120.5] 121.7] 123.0 124.2 125.4 | 126.7 | 127.9
23.6 || 113 2|114.t] 115.7] 116.9| 118.1 | 119.4] 120.6 | 121.8 123.1 | 124.3 | 125.5 | 126 8
23.8 |! 112.3 | 113.5 | 114.8 | 116.0| 117 2 | 118.4] 119.7 | 120.9 122.1 128.3 | 124.6 | 125.8
24.0 | 111.4/ 112.6) 113.8] 115.0 | 116.2 117.4] 118.7] 119.9 | 121.1 122.3 | 128.5 | 124.7
24.2 |] 110.5 | 111.7} 112.9 | 114.1) 115.3 | 116.5] 117.7] 118.9 120.1! 121.3 | 122.5 | 123.7
24.4 |} 109.5 | 110.7 | 111.9 | 113.1 | 114.3 | 115.5] 116.7| 117.9 | 119.1, 120.3 | 121.5 | 122.7 |!
24.6 || 103.6 | 109.8 | 111.0 | 112.2 | 113.4 | 114.6] 115.8 | 116.9 | 118.1 | 119.3 | 120.5 | 121.7 ||
24.8 | 107.8 | 108.9 | 110.1) 111.3) 112.5 | 113.7] 114.8 | 116.0 | 117.2 | 118.4 | 119.5 | 120.7
25.0 |) 106.9 | 108.1 | 109.2| 110.4 | 111.6 12.7} 113.9 115.1 116.2 117.4 | 118.6 | 119.7
25.2 || 106.0 | 107.2 | 108.4] 109.5 | 110.7 | 111.8] 113-0 | 114.1 | 115.3 | 116.5 | 117.6 | 118.8
25.4 |) 105.2 | 106.4 | 107.5 | 108.7 109.8 | 111.0/ 112.1 118.8. 114.4/ 115.6 116.7 | 117.9
25.6 || 101.4 | 105.5 | 106.7 | 107.8 | 108.9 | 110.1] 111.2 112.4) 113.5 | 114.6 | 115.8 | 116.9
25.8 || 103.6 | 104.7 | 105.8 | 107.0 108.1 Melee a ae 113.8 | 114.9 | 116.0
26.0 | 102.8 | 103.9 | 105.0| 106.1 107.3 | 108.4 once 112.9 114.0 115.1
26.2 | 102.0 | 103.1 / 104.2 | 105.3 106.5 | 107.6] 108.7 | 109.8 110.9 | 112.0 118.1 | 114.2
26.4 || 101.2 | 102.3 | 103.4] 101.6) 105.7 | 106.8] 107.9 | 109.0 110.1 | 111.2 112.3 | 113.4
26.6 | 1005 101.6 | 102.7) 103.8 | 104.9 | 106.0] 107.1 108.2 109.3 110.4 111.4 112.5
26.3 |, 99.7 | 100.8 | 101.9| 103.0 104.1 | 105.2] 106.3 107.4 108.5 | 109.5. 110.6 | 111.7
27.0 || 99.0| 100.1 | 101.2] 102.2) 103.3 | 104.4] 105.5 106.6 | 107.6 | 108-7 | 109.8 110.9
27.2 || 98.3] 99.3} 100.4] 101.5 | 102.6 | 103.6 | 104.7 | 105.8 106.8 | 107.9 | 109.0 | 110.1
27.4 |) 97.5} 98.6| 99.7| 100.7/ 101.8} 102.9] 103.9 | 105.0 106.1 107.1 108.2) 109.3
27.6 96.8 | 97.9} 98.9| 100.0} 101.1 | 102.1] 103.2 | 104.2 | 105.3. 106.3 107.4. | 108.5
27.8 96.1} 97.2] 98.2] 99.3] 100.3 | 101.4] 102.4 | 103.5 | 104.5 105.6 106.6 | 107.7
|
28.0 || 95.1) 96.5| 97.5] 98.6] 99.6 | 100.6] 101.7 | 102.7| 103.8 104.8 105.9 | 106.9
28.2 || 94.8] 95.8] 96.8] 97.9] 98.9] 99.9] 101.0 | 102.0| 103.0 104.1 105.1 | 106.1
23.4 || 94.1] 95.1] 96.1] 97.2] 98.2] 99.2] 100.2 | 101.3 | 102.3 | 103.3 | 104.3 | 105.4
28.6 | 93.4) 94.4) 95.5] 96.5) 97.5] 98.5] 99.5 | 100.6 | 101.6 102.6 103.6 | 104.6
28.8 92.8} 93.8] 94.8| 95.8) 96.8) 97.8] 98.8] 998) 100.8 101.8 102.8 | 103.8
29.0 || 92.1) 93.1] 94.1] 95.1] 96.2] 97.2] 98.2] 99.2 100.2 101.2 1022 103.2
29.2 91.5| 92.5) 93.5| 94.5) 95.5| 96.5] 97.5] 98.5] 99.5! 100.5 101.5 | 102.5
29.4 90.9| 91.9] 92.9} 93.9) 94.8] 95.8] 96.8/ 97.8] 98.8 998 100.8 | 101.8
29.6 90.3| 91.3] 92.2] 93.2} 94.2/ 95.2] 96.2] 97.2] 98.2) 99.1 100.1 | 101.1
29.8 89.7| 90.6) 91.6) 92.6; 93.6| 94.5] 95.5| 96.5) 97.5 98.5 99.4| 100.4
30.0 89.1} 90.0| 91.0) 92.0) 92.9) 93.9] 91.9] 95.9) 96.8 97.8 98.8) 99.7

30.2 88.5 | 89.4| 90.4] 91.4} 92.3] 93.31 °914.3! 95.2] 96.2) 97.2) 98.1] 99.1
30.4 87.9| 88.8) 89.8] 90.8| 91.7 92.71 93.6. 91.6] 95.6! 96.5 ' 97.5) 98.4

I) 90

REDUCING TO THE TRUE MEAN BAROMETRIC PRESSURE. 431

Wuen the Barometrical means to be used have been derived from observations
taken at such hours of the day as, if combined, do not give the true mean pressure,
they must be reduced to the true means by using the Tables XX. and XXII.
These tables give the corrections to be applied to the hourly means, in each month,
for reducing them to the means which would have been given by observations made
at each of the twenty-four hours. The correction for any given set of hours is found
by taking the mean of the corrections due to each of the combined hours, paying
due attention to the signs. Table XX. has been computed from the hourly obser-
vations made under the superintendence of Professor A. D. Bache, at Girard College,
Philadelphia. Table XXL. is from the Greenwich Observations, by Glaisher.

XX.
Nort America. — Puivapetpuia. Lat. 389° 58’ N. Long. 75° 11/ W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Barometric Pressure of the respective Days, Months, and of the Year.

ee in English Inches.
= ae

Sept. | Oct. | Noy. | Dec. || Year.

Hour. | Jan. | Feb. |March. April. | May. | June. j July. | Aug.
|

Inch. | Inch. | Inch. Inch. | Inch | Inch. | Inch. | Inch. | Inch. Inch. | Inch | Inch Inch.

Midnight. | +.002/—.009|—.007|—.004 —.002| +.003 —.007 —.003 —.002/ +.007 +.003 —.010]—.0024
1 |+.001/—.007|—.002] —.001! +.003} +.007| +.001| —.001) +.005| +.007| +.007 —.011|+.0007

| | |
2 |—.007/-.003|—.001| +.006) +.007) +.010 +.004 +.004 +.010/ +.011 +.011 —.016/+.0030

3 |-.005)+.002|+.009 ee +.007| +.003) +.005 eae —.014) +.0036
|

4 —.003)+.003/+.009! +.002) +.003 +002) -000) +.00 1) +.005| +.007' +.003 —.010) +.0038

5 |— 003} .000|+.002/-.007 —.006) —.007, —.010 —.005| -.006 —.003 —.006 —.008 | —.0050

6 |—.009|—.004)/—.011)—-.020 —.019| —.022) —.019| —.017| —.016| —.012 —.012)—.015|—.0147

7 |—.021|-.013|-.020 —.029 —.026 | —.024/—.025, —.023| —.023 —.021 —.019 —.023| —.0222
| | |

8 |—.032/—.023|—.028) —.034| —.031| —.029 —.028| —.026) —.029' —.030 —.028 —.029 | —.0290

|

9 |—.040|-.026 —.028| —.035 —.028) —.027 —.027| -.033 —.031/—.029 —.034 —.030|—-.0207

10 = |—.041/—.026|—.025| —.033, —.02 1] —.025 —.026 —.030 —.029|—.026' —.038 —.032 | —.0296

11 | —.023|—.019|—.016| —.023 —.018|—.019, —.019 —.022) —.021/-.014 —.017, —.011|—.0185

|
Noon. | +-006|—.004|—.002| —.008) —.006 —.010 —.012 —.012) —.009) +.001|+.006) +.005 L 0037

| +.028|+.017/+.014] +.006 +.005| .000; .C00, .000| +.005) +.006| +.023 +.024|+.0107,

—_

2 +.037|+.032|+.031|+.021 +.017 +.011'+.011) +.012) +.020 +.028 +.033 +.034!+.0240
3 | +.034/+.034/+.034 poe +.028 +.019) +.020) +.022| +.024) +.028) +.033 +.031/+.0287
| 4 |+.031)+.032|+.034|+.042 +.032 +.027/ + 027) +.027) +.030) +.028!+.027 +.030|+.0306
5 | +.024/+.021/+.025|+.036 +.034|+.030| +.028) +.029 +.027|)+.021/+.018 +.026 | +.0267 |
6 |+.015/+.014]+.016] +.031 +.027|+.023) +.02S| +.028| +.023/+.012/+.005| +.021 |+-0202|
7 | +.003/+.006|+.007 +.022, +.016 +,018)+.021 +.018) +.016 +.001|—.002 +.018 | +.0123
| | |
8 +.003) .000)—.003) +.009 +.002| +.010) +.014) +.008) +.007) —.009| —.006 +.013 ||+.0040
9 | —.002/-.008|—.010)+.001 —.010| .000 +.003 +.003 —.001 —.013'—.007 +.012 ||--0027
10 |—.003/—.012\—.011) —.003 —.018| —.003 —.004 —.001 —.005 —.016;—.010 +.008 |—.0065
11 | +.002/—.011|—.017) —.010 —.019|—.005 —.002 —.002) —.004 —.009 er —.0064
| | |
6, 2, 10 |+.008|+.005/+.003|—.001 —.007|—.005 —.004 —.002| .000} .000 +.004 +.009)+ .001
7, 2,9 |+.008|+.004] .000|—.002 —.00¢}—.004 —.001 —.003) —. 001) —.002 +.002 +.008 | 000
9,12, 3,9] .000|-.001'—.001|—.002 —.004|—.004 —.004 —.004 —.004 —.003 —.001 +.005|— .002

— = Jt

D 91

Sa

432 XXI. Eneianp. — Greenwicn. Lat. 51° 29’ N.; Long. 0° 0’.
Coriections to be applied to the Means of the Hours of Observation, or Sets of Hours,

to obtain the true Mean Barometric Pressure for the respective Months. — GuaIsHER.
English Inches.

|

Hours. Jan. | Feb. |March | April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Mean.

—|

Inch. | Inch. | Inch. | Inch. | Inch. | Inch. | Inch | Inch. | Inch. | Inch. | Inch. | Inch. | Inch.
Midn... -000|—.001|}—.002|—.008 |—.005| .000|—.006|—.010|—.005|—.005 |—.011|}—.004|—.005

1 O01} .004; .013} .000; .002| .004} .000; .000} .000) .004/—.005} .001] .002
-002| .008} .020) .007|} .004| .005) .003| .007] .005| .010} .003| .006| .007
005} .012) .023) .010} .005| .004| .005| .011] -010} .015] .008!} .010} .009

ow bo

4 O11! O14) .022; .011]} .005} .001] .005) .014) .012} .020/ .013) .012) .012
5 -015| .015} .019| .011} .006\—.002} .006|) .011) .014| .022] .016} .014! .012
6 .015| .012| .012| .006| .006/—.006| .002} .005) .019| .018| .015] .011/ .009
7 -010| .007) .005|—.003| .006|/—.010|—.004) .000| .001} .008| .010) .006| .003

8 -003; .000)—.004|—-.008} .003|—.012|—.008 |—.007|—.006/—.003} .003| .004/—.003
9 ||—.008/—.008 |—.010!—.011 |—.007|—.012)}—.010)—.008|—.011|—.009 | —.005 |—.010|—.009
10 |/—.010|—.015|—.015|—.014/—.009 |—.011/—.010|—.009 |—.013 |—.014|—.007/—.015|—.012
11 |'—.014|—.016|—.015|—.011 |—.006 |—.009 | —.009 |—.008 |—.010|—.014|—.005|—.015/—.011

Noon. . . |/—-005/—.012|—.010|—.008 |—.002 |—.006|—.006 |—.005|—.005|—.010| .002/—.009|—.006
1 -002|—.006 —.005|—.004} .000|—.003|—.003; .000| .000)/—.003| .007) .003|/—.001 |!
| 2 -005| .003) .000] .003) .003] .003} .001| .003} .004| .004| .011| .008] .004 |;

3 004, .006} 003} .009| .006| .007) .005| .005) .008} .005| .010| .010) .006 ||
4 -002; .008; .005) .004] .010} .013) .009) .009| .010} .003} .008) .009| .007
5 -000| .006| .004; .014) .014; .017| .013) ..011} .011] .000} .004} .006] .008
6 ||—.003) .002| .000) .011| .015) .017| .013| .011| .006/—.005| .000| .002] .006
7 ||--005|—.004/—-.006/—.007; .010) .014) .010) .005| .000|/—.008|—.006|—.003| .000
8

9 ||—.007 —.008 —.015|—.009|—.006| .003)—.001|—.010|—.009 |—.014|—.017|—.0 °9 |—.008
10 ||—.005|—.007|—.012|—.012 |—.008 |—.002|—.005 |—.015|—.011/—.012|—.019|—.010/—.010
11 ||—-004)—.005 | —.010/—.012|—.008 |—.002|—.012 |—.015|—.011|—.009 |—.017/—.00$|—.009

| 6. 6 -006) .007) .006| .008| .011| .005) .008| .008| .008| .006| .007| .006| .008

ened .002 .002) .000/—.005| .008) .002) .003) .002) .000) .000) .002| .002| .001
8.15 —.002 —.003 —.008/—.006} .002/—.002|—-.002/—.006|—.006|—.007/—.004 | —.001|—.004
ae 9 —.007 —.008 —.013)—.010|—.006 | —.004 |—.905 —.009 —.010 |—.012|—.011|—.009|—.009
10.10 —-007 —.011/—.014)—.013|—.009 |—.006 |—.007 —.012|—.012|—.013|—.013|—.012|—.011

|
—-006|—.006|—.012|—.005| .000) .008) .004|—.005|—.005/—.011|/—.012|/—.006 |—.005
emnsi9 003, .001 —.003|—-.003| .001/—.001/—.001 —.002/—.001/-.001| .001| .002| .001
| 6. 2 8 .005| .003) .000| .001; .003} .002) .002) .001| .003} .004| .005| .004| .003
210 005) .003) .000)—-.001| .000|—.002|—.001|—.002| .001) .003) .002/ .003) .001 ||
6. 2. 6 006 | -006) .004; -007) .008|—-.005! .005) .006) .007/ .006) .009) .007) .006

7. 2 -007; .005; .003| .000| .004/—.001/—.001| .002) .062) .006) .010) .007) .003

| 8. 2 -004; .002|—.002|—.002] .003/—.004/—.003/—.002|—.001} .000) .007| .006} .001 |:
8. I -002 |—.003 |—.004|/—.006} .001)—.007)/—.006 —.003|—.003/—.003| .005, .003)/—.002
dena -006) .001) .000)/—.003| .003)—.006|—.003) .000) .000| .002|} .008| .004| .001 |

|| 9.12.3.9 |} -.004'-.005|-.008|-.005]-.002]-.002|—.003 —.004|—.004 —.007/—.002/-.004| -.004 |

The numbers without sign must be added: those with the sign — must be subtracted.

dD 92

BAROMETRICAL MEASUREMENT OF HEIGHTS. 43é

XXII. TABLE TO REDUCE, BY INTERPOLATION,

THE OBSERVATIONS TO THE SAME ABSOLUTE TIME.

DECIMALS OF AN HOUR.

Min. | Decimal. |} Min. | Decimal. || Min. ; Decimal. || Min. | Decimal. || Min. | Decimal. | Min. | Decimal.
1 017 11 1835 21 .350 31 O17 4l -683 51 +850
2 033 12 -200 22 367 32 :Doa 42 -700 52 .867
3 -050 13 ala 23 2305 33 -550 43 17 53 883
4 -067 14 233 24 -400 34 29607 44 733 54 -900
5 .083 15 -250 25 417 35 583 45 -750 55 917
6 -100 16 -267 26 433 36 -600 46 -767 56 933
7 117 17 283 27 450 Sil 617 47 -783 57 -950
8 -133 18 -300 28 -467 38 -633 48 -800 58 -967
9 -150 19 317 29 483 39 -650 49 817 |} 59 -983

10 -167 20 1300 30 -500 40 -667 50 833 60 | 1.000

TABLE FOR CORRECTION OF CURVATURE AND REFRACTION.

From a mountain, when furnished with a barometer, or with an apparatus for de-
termining the temperature of boiling water, and a pocket level, an observer can
find the elevations of distant points, which are in sight, but lower than the mountain
itself on which he stands. He has only to seek, with the level, the point on the
slope of the mountain which corresponds to the point at a distance that he wishes to |
determine, and to take there a barometrical, or a boiling point observation. This
observation is to be calculated in the usual way, but the result must be corrected ,for
the curvature of the surface of the globe, and for the atmospheric refraction, by
means of the following Table.

This method, which furnishes the means of multiplying, without much trouble,
the measurements of heights, gives approximations which are sufficient for most
of the purposes of Physical Geography. It may even seem preferable to direct
measurements for determining the mean elevation of certain physical lines, which
are best estimated when seen from a distance; such as the upper limit of the
growth of trees, the limits of different kinds of vegetation, that of permanent snow,
that of the mean elevation of the crest of a mountain range, Wc.

Table XXIII. is taken from Captain Lee’s Collection of Tables and Formule,
2d edit., page 81.

D 93

434 XXIII, CORRECTIONS FOR CURVATURE AND REFRACTION.

Showing the Difference of the Me ee ee ee ee acacia and True Level, in feet and decimals, for Distances in feet and miles.

Correction in Feet.

Distances
in Feet. For Cur- For Re-
vature, fraction.
100 00024 -00004
150 -00054 -00008
200 -00094 -00013
250 | -00149 -00021
300 -00215 -00031
350 {| .00293 00042
400 -00383 -00055
450 -00484 -00069
500 -00598 -00085
550 00724 -00103
600 -00861 -00123
650 -01019 00144
700 -01172 -00167
750 -01345 -00192
800 01531 .00219
850 -01728 -00247
900 -01938 -00277
950 -02159 -00308
1000 -02392 -00333
1050 -02638 00377
1100 || .02895 | .00414
1150 -03164 -00452
1200 -03445 -00492
1250 -03738 -00534
1300 -04043 -00578
-04361 -00623
-04689 -00670
-05030 00719
-05383 -00769
-05748 .00821
-06125 00875
06514 .00931
-06914 -00988
-07327 -01047
-07752 -01107
.08188 -01170
-08637 -01234
-09098 -01300

-09570 -01367

For Curva-
ture and
Refraction.

-00020
-00046
-00083
-00128
-00184

-00251
-00328
-00415
-00513
-00621

-90738
-00866
-01005
-01153
-01312

.01481
-01661
-01851
02059
-02261

-02481
-02712
-02953
-03204
-03465

-03738
-04019
-04311
04614
01927

05250
-05583
-05926
-06280
-06645

.07018
-07403
.07798
-08203

Distances

in Miles.

Died dole bles

ee
vie

10
11
12
13

14
15
16

m

19
20

94

For Cur-
vature.

-0417
-1668
03752
-6670
1.5008

2.6680
4.1688
6.0030
8.1708
10.6720

13.5468
16.6750
20.1769
24.0120
28.1809

32.6830
37.5190
42.6880
48.1910
54.0270

60.1971
66.7000
80.7070
96.0480
112.7230

130.7320
150.0750
170.7520
192.7630
216.1086

240.7870
266-8000

Correction in Feet.

For Re-
fraction.

-0060
.0238
0536
-0953
2144

3811
°5955
8561
1.1673
1.5246

1.9295
2.3821
2.8824
3-4303
4.0258

4.6690
5.3599
6.0997
6.8844
7.7181

8.5996
9.5286
11.5296
13.7211
16.1033

18.6760
21.4393
24.3931
27.5376
30.8727

34.3981
38.1143

For Curva-

ture and
Refraction.

0357
1430
-3216
5717
1.2864

2.2869
3.5733
5.1469
7.0035
9.1474

11.5773
14.2929
17.2945
20.5817
24.1551

28.0143

32.1591
36.5883
41.3066
46.3089

51.5975
57.1714
69.1774
82.5269
96.6197

112.0560
128.6357
146.3589
165.2254
185.2359

206.3889

228.6857

435

THERMOMETRICAL

MEASUREMENT OF HEIGHTS,

OR

TABLES

FOR DEDUCING DIFFERENCES OF LEVEL FROM OBSERVATIONS OF THE
TEMPERATURE OF BOILING WATER.

95

436

THERMOMETRICAL MEASUREMENT OF HEIGHTS.

TABLES

FOR DEDUCING DIFFERENCES OF LEVEL FROM THE TEMPERATURE OF THE
BOILING POINT OF WATER.

Wuen water is heated in the open air, the elastic force of the vapors produced
from it gradually increases, until it becomes equal to the incumbent weight of the
atmosphere. Then, the pressure of the atmosphere being overcome, the steam
escapes rapidly in large bubbles, and the water boils. The temperature at which,
in the open air, water boils, thus depends upon the weight of the atmospheric col-
umn above it, and under a less barometric pressure the water will boil at a lower
temperature than under a greater pressure. Now, as the weight of the atmosphere
decreases with the elevation, it is obvious that, in ascending a mountain, the higher
the station where an observation is taken, the ower the temperature at which water
boils at that station will be.

The difference of elevation between two places, therefore, can be deduced from
the temperature of boiling water observed at each station. It is only necessary to
find the barometric pressures which correspond to those temperatures, and, the at-
mospheric pressures at both places being known, to compute the difference of level
by a formula, or by the tables given above for computing heights from barometrical
observations.

From the above, it may be seen that the heights determined by means of the tem-
perature of boiling water are less reliable than those deduced from barometrical
observations. Both derive the difference of altitude from the difference of atmos-
pheric pressure. But the temperature of boiling water gives only indirectly the
atmospheric pressure, which is given directly by the barometer. This method is
thus liable to all the chances of error which may affect the measurements by means
of the barometer, besides adding to them new ones peculiar to itself, the principal
of which, not to speak of the differences exhibited in the various tables of the force
of vapor, is the difficulty of ascertaining with the necessary accuracy the true
temperature of boiling water. In the present state of thermometry it would hardly
be safe, indeed, 1o answer, in the most favorable circumstances, for quantities so
small as hundredths of degrees, even when the thermometer has been constructed
with the utmost care ; moreover, the quality of the glass of the instrument, the form
and the substance of the vessel containing the water, the nature of the water itself,
the place at which the bulb of the thermometer is placed, whether in the current of
steam or in the water, —- all these circumstances cause no inconsiderable variations
to take place in the indications of thermometers observed under the same atmospheric

D 96

THERMOMETRICAL MEASUREMENT OF HEIGHTS. 437

pressure. Owing to these various causes, an observation of the boiling point, differ-
ing by one tenth of a degree from the true temperature, ought to be still admitted as
a good one. Now, as the tables show, an error of one tenth of a degree Centigrade
in the temperature of boiling water would cause an error of 2 millimetres in the
barometric pressure, or of from 70 to 80 feet in the final result, while with a good
barometer the error of pressure will hardly ever exceed one tenth of a millimetre,
making a difference of 3 feet in altitude.

Notwithstanding these imperfections, the hypsometric thermometer, or thermo-
barometer, is of the greatest utility to travellers traversing distant or rough countries,
on account of its being more conveniently transported, and much less liable to
accidents than the mercurial barometer. ‘The best form for it is that contrived and
described by Regnault in the Annales de Chimie et de Physique, Tom. XIV. p. 202.
It consists of an accurate thermometer with long degrees, subdivided into tenths, whose
bulb is placed, about 2 or 3 centimetres above the surface of the water, in the steam
arising from distilled water in a cylindrical vessel, the water being made to boil by a
spirit-lamp. ‘The whole instrument when closed is about 6 inches long; when drawn
out for observation, about 14 inches.

Table XXIV. of barometric pressures corresponding to temperatures of boiling
water, has been calculated by Regnault from his Tables of Forces of Vapor, and
published in the Annales de Chimie et de Physique, Tom. XIV. p. 205. It gives, in
millimetres of mercury, the barometric pressures corresponding to every tenth of a
Centigrade degree ; for greater convenience, the values for every hundredth have
been added,

The accuracy of this table has been tested by direct observation by Mr. Wisse, a
traveller competent in such matters, who noted down simultaneously the tempera-
tures of the boiling point of water and the height of the barometer, in various parts
of the Andes, up to the summit of the voleano of Pichincha, including in his obser-
vations barometrical pressures ranging from 752 to 480 millimetres of mercury.
The agreement between the barometric pressures given here by Regnault and those
found by Wisse are very satisfactory, the differences never exceeding a few tenths
of a millimetre. See Annales de Chimie et de Physique, Tom. XXVIIL. p. 123.

Table XXV. is the same table, revised by A. Moritz, who, in a communication to
the Académie des Sciences, in October, 1856, called the attention to some slight
errors of computation in Regnault’s table, and gave the corrected numbers for every
whole degree from 40° to 102° Centigrade. ‘Those numbers are given here from
&0° upwards, as published in the Journal de I’ Institut ; the values for every tenth of
a degree, and their differences, have been computed to fit the table for practical use.
The comparison of the two tables will show that the corrections mostly amount to a
few hundredths, and never exceed one tenth of a millimetre.

Table XXVI. is table XXV. reduced to English measures.

438

XXIV. BAROMETRIC PRESSURES CORRESPONDING TO TEMPERATURES OF BOILING WATER. 1

|
Centig.
Degrees.
0.

awe Millim.
85.0 433.04
85.1 .|| 434.75
85.2 436.46
85.3 438.17
85.4 439.89
80.0 441.62
85.6 443.35
ae 445.09
85.8 446.84
85.9 448.59
86.0 450.34

86.1 452.10
86.2 453.87

|

| 86.3 455.64
86.4 457.42
86.5 459.21
86.6 461.00
86.7 462.80
86.8 464.60
86.9 466.41
87.0 468.22
87.1 470.04
87.2 471.87
87.3 473.70

87.4 475.54

87.5 477.38
87.6 479.23
87.7 481.08
87.8 482.94
87.9 484.81

486.69
488.57
490.45
492.34
494.24

496.15
498 06
499.98
501.90
503.82

0.

1.

Millim.
433.21
434.92
436.63
438.34
440.06

441.79
443.52
445.26
447.01
448.76

450.52
452.28
454.05
455.82
457.60

459.39
461.18
462 98
464.78
466.59

468.40
470.22
472.05
473.88
475.72

477.56
479.41
481.27
483.13
485.00

486.88
488.76
490.64
492.53
494.43

496.34
498.25
500.17
502.09
504.01

_ 1.

2.

Millim.

433.38
435.09
436.80
438.51

440.23

441.97
443.70
445.44
447.19
448.94

450.69
452.45
454.22
456.00
457.78

459.57
461.36
463.16
464.96
466.77

468.58
470.41
472.24
474.07
475.91

477.75
479.60
481.45
483.31
485.19

Hundredths of a Degree.

3.

Millim.

4.

Millim.

433.55 | 433.72
435.26 | 435.43
436.97 | 437.14
438.69 | 438.86
440.41 | 440.58

442.14 | 442.31
443.87 | 444.05
445.61 | 445.79
447.36 | 447.54
449.11 | 449.29

450.87 | 451.04
452.63 | 452.81
454.40 | 454.58
456.17 | 456.35
457.96 | 458.14

459.75 | 459.93
461.54 | 461.72
463.34 | 463.52
465.14 | 465.32
466.95 | 467.13

468.77 | 468.95
470.59 | 470.77
472.42 | 472.60
474.25 | 474.44
476.09 | 476.28

477.93 | 478.12
479.78 | 479.97
481.64 | 481.82
483.50 | 483.69
485.37 | 485.56

487.25 | 487.44
489.13 | 489.32
491.02 | 491.21
492.91 | 493.10
494.81 | 495.00

496.72 | 496.91
498.64 | 498.83
500.56 | 500.75
502.48 | 502.67
504.40 | 504.60

3.

Millim.
433.89
4135.60
437.31
439.03
440.75

442.48
444.22
445.96
447.71
449.46

451.22
452.98
454.75
456.53
458.31

460.10
461.90
463.70
465.50
467.31

469.13
470.95
472.78
474.62
476.46

478.30
480.15
482.01
483.87
485.75

487.63
489.51
491.39
493.29
495.19

497.10
499.02
500.94
502.86
504.79

3.

6.

Millim.
434.07
435.78
437.49
439.20
440.93

442.66
444.39
446.14
447.89
449.64

451.40
453.16
454.93
456.71
458.49

460.28
462.08
463.88
465.69
467.50

469.31
471.14
472.97
474.80
476.64

478.49
480.34
482.20
454.06
485.94

487.82
489.70
491.58
493.48
495.39

497.30
499.2]
501.13
503.05
504.98

6.

Millim.
434.24
435.95
437.66
139.37
441.10

442.83
44457
44631
448.06
449.81

451.57
453.34
455.11
456.89
458.67

460.46
462.26
464.06
465.87
467.68

469.49
471.32
473.15
474.99
476.83

478.67
480.52
482 38
484.25
486.13

488.01
489.89
491.77
4193.67
495.58

497.49
499.40
501.32
503.24
505.18

Ze

Millim.
434.41
436.12
437.83
439.55
441.27

443.00
444.74
446.49
448.24
449.99

451.75
453.52
455.29
457.06
458.85

460.64
462.44
464.24
466.05
467.86

469.68
471.50
473.33
475.17
477.01

478.86
480.71
482.57
484.44
486.31

488.19
190.07
491.96
4193.86
495.77

497.68
499.60
501.52
503.44
505.37

8.

9.

{
Millim.
434.58 |
436.29
438.00
439.72
441.45

443.18
444.92
446.67
448.41
450.16

451.92
453.69
455.46
457.24
459.03

460.82
462.62
464.42
466.23
468.04

469.86
471.69
473.52 |
475.36
477.20 |
479.04
480.89 |
482.75 |i
484.62 |
486.50 |
1

488.38 |)
490.26
492.15
494.05
495.96

497.87
499.79
501.71
503.63
505.57

9.

439

2 BAROMETRIC PRESSURES CORRESPONDING TO TEMPERATURES OF BO.:sING WATER

Centig.

Degrees.

3
| 39.0
| 89.1
89.2
89.3
89.4
|

89.5
89.6
89.7
89.8
89.9

90.0
90.1
90.2
! 90.3
90.4

|

| 90.5
90.6
90.7
90.8

| 90.9
91.0
91.1
91.2
91.3
91.4

91.5
91.6
91.7
91.8
91.9

92.1
92.2
92.3
92.4
|

92.5
92.6
92.7
92.8
92.9

3

Millim.

505.76
507.70
509.65
511.60
513.56

515.53
517.50
519.48
521.46
523.45

| 525.45

527.45
529.46
531.48
533.50

535.53
537.57
539.61
541.66
543.72

545.78
547.85

|| 549.92

552.00
554.09

556.19
558.29
560.39
562.51
564.63

566.76
568.89
571.03
573.18
575.34

577.50
579.67
581.84
584.02
586.21

0.

Millim.
505.95
507.89
509.84
511.80
513.76

415.73
517.70
519.68
521.66
523.65

525.65
527.65
529.66
531.68
533.70

535.73
537.77
539.81
541.87
543.93

545.99
548.06
550.13
552.21
554.30

556.40
558.50
560.60
562.72
564.86

566.97.
569.10
571.24
573.40
575.56

5977.72
579.89
582.06
584.24
586.43

i.

Millim.
506.15
508.09
510.04
511.99
513.95

515.92
517.90
519.88
521.86
523.85

525.85
527.85
529.86
531.88
533.91

535.94
537.98
540.02
542.07
544.13

546.19
548.26
550.34
552.42
594.51

556.61
558.71
560.81
562.93
565.06

567.19
569.32
571.46
573.61
575.77

577.93
580.10
582.28
584.46
586.65

2.

3.

Millim.
506.34
508.28
510.23
512.19
514.15

516.12
518.09
520.07
522.06
524.05

526.05
528.05
530.07
532.09
534.11

536.14
538.18
540.22
542.28
544.34

546.40
548.47
550.54
552.63
554.72

556.82
558.92
561.03
563.15
565.27

567.40
569.53
571.67
573.83
575.99

578.15
580.32
582.49
584.68

586.87

Be

4.

Millim.
506.54
508.48
510.43
512.38
514.35

516.32
518.29
520.27
522.26
524.25

526.25
528.25
530.27
532.29
534.31

536.35
538.39
540.43
542.48
544.54

546.61
548.68
550.75
552.84
554.95

557.03
559.13
561.24
563.36
565.48

567.61
569.75
571.89
574.04
576.20

578.37
580.54
582.71
584.90

587.09

4.

35.

Millim.
506.73
505.67
510.62
512.58
514.54

516.51
518.49
520.47
522.46
524.45

526.45
528.45
530.47
532.49
534.51

536.55
538.59
5410.63
542.69
544.75

546.81
548.88
550.96
553.04
555.14

557.24
559.34
561.45
563.57
565.69

567.85
569.96
572.10
574.26
576.42

578.58
580.75
582.93
585.11
587.31

5.

Hundredths of a Degree.

6.

Millim.

506.92
508.87

510.52
512.78
514.74

516.71
518.69
520.67
522.66
524.65

526.65
528.66
530.67
532.69
534.72

536.75
538.79
540.84
542.90
544.96

547.03
549.09
551.17
553.25
555.35

557.45
559.55
561.66
563.78
565.91

568.04
570.17
572.32
574.48
576.64

578.80
580.97
583.15
585.33
587.53

Ze

Millim.

507.12
509.06

511.01
912.97
514.94

516.91
518.89
520.87
522.86
524.85

526.85
528.86
530.87
532.89
534.92

536.96
539.00
541.04
543.10
545.16

547.23
549.30
551.38
553.46
555.56

557.66
559.76
561.87
563.99
566.12

568.25
570.39
572.53
574.69
576.85

579.02

581.19

583.37
585.55

587.75

99

8.

Millim.

507.31

509.26

511.21

513.17

515.14

517.11
519.08
521.06
523.05
525.05

527.05
529.06
531.08
533.10
535.12

537.16
539.20
541.25
543.31
545.37

547.44
549.51
551.58
553.67
555.77

557.87
559.97
562.09
564.21
566.33

568.46
570.60
572.75
574.91
577.07

579.24
581.41
583.58
585.77

387.97

8.

Millim.
507.51
509.45
511.40

513.36
515.33
517.30

519.28
521.26
523.25
525.25
527.25
529.26
531.28
533.30
535.33
537.37
539.41
541.45

543.51
545.57

549.71
551.79
593.88

547.64
555.98

558.08
560.18
562.30
564.42
566.55
568.68
570.82
572.96
575.12
577.28
579.45
581.62
583.80 |

|

585.99
588.19

9.

440

BAROMETRIC PRESSURES CORRESPONDING TO TEMPERATURES OF BOILING WATER.

wo ©
Or or

.
or
o©mMWIH vo

© ©
or ore

96.0
96-1
96.2
96-3
| 96.4

96.5
96.6
96.7
96.8
96.9

0.

Millim.
588.41
590.61
592.82

| 595.04

597.26

|| 599.49
| 601.72

603.97
606.22
608.48

1.
Millim.
588.63

D>
i)
tw
es
o

-
—
2
_—
©

aD
~
w
eo
©

Millim.

| 672.63

2.

588.85
591.05
593.26
595.48
597.71

599.94
602.17
604.42
606.67
608.93

611.19
613.47
615.75
618.04
620.33

622.63
624.94
627.25 |
629.58
631.91

634.25
636.59
638.94
641.30 |
643.67 |

646.05
648.43
650.82
653.21
655.61

658.02
660.43
662.36
665.29
667.73

670.18
675.09

677.57
680.05

2.

Hundredths of a Degree.

3.

Millim.
589.07
591.27
593.49
595.71
597.93

600.16
602.39
604.64
606.90
609.16

611.42
613.69
615.97
618.27
620.56

— OO
or)

~

an
2 wm Ww

sto tN

A9
629.81
632.14

aD
bo

634.48
636.82
639.18
641.54
643.90

646.28
648.67
651.06
653.45
655.85

658.26
660.68
663.10
665.53
667.97

670.42
672.88
675.34
677.81
680.29

3.

4.

Millim.
589.29
591.49
593.71
595.93
598.15

600.38
602.62
604.87
607.12
609.38

611.65
613.92
616.21
618.50
620.79

623.09
625.40
627.72
630.04
632.38

634.72
637-06
639.41
641.77
644.14

646.52
648.91
651.30
653.69
656.09

658.50
660.92
663-34
665.78
668.22

670.67
673.12
675.59
678.06
680.54

4.

5.

Millim.
589.51
591.71
593.93
596.15
598.37

600.60
602.84
605.09
607.35
609.61

611.87
614.15
616.43
618.72
621.02

623.32
625.63
627.95
630.27
632.61

634.95
637.29
639.65
642.01
644.38

646.76
649.14
651.53
653.93
656.33

658.74
661.16
663.58
666.02
663.46

670.91
673.37
675.83
678.31

680.79

5.

6.

Millim.
589.73
591.94
594.15
596.37
598.60

600.83
603.07
605.32
607.58
609.84

612.10
614.38
616.66
618.95
621.25

623.56
625.87
628.18
630.51
632.84

635.18
637.53
639.39
642.25
644.62

647.00
649.38
651.77
654.17
656.58

658.99
661.40
663.83
666.26
6608.71

671.16
673.62
676.08
678.56
681.04

6.

7

Millim.
589.95
592.16

598.82

601.05
603.29
605.54

612.33
614.61
616.89
619.18
621.48

623.79
626.10
628.41
630.74
633.08

635.42
637.76
640.12
642.48
644.86

647.24
649.62
652.01
654.41
656.52

659.23
661.64
664.07
666.51
668.95

671.40
673.86
| 676.33
678.81
681.29

7.

594.37 |
596 59

607.80 |
610.06 |

681.53

8. 9.

Millim.
590.17
592.38
594.60
596.82
599.04

601.27
603.52
605.77
608.03
610.29

612.56
614.83
617.12
619.41
621.71

624.02
626.33
628.65
630.97
633.31

635.65
638.00
640.36
642.72
645.09

647.47
649.86
652.25
654.65
657.06

659.47
661.89
664.31
666.75
669.20

671.65
674.11
676.58
679.05

8. |

100

647.71
650.10
652.49
654.89
657.30

659.71
662.13
664.56
667.00
669.44

Millim.
590.39
592.60
594.82
597.04
599.27

601.50
603.74
605.99
608.25
610 51

612.78
615.06
617.35
619.64
621.94

624.25
626.56
628.88
631.21
633.55

635.89
638.23
640.59
642.95
645.33

671.99
674.35
676.82
679.30
681.78

3

en

4 BAROMETRIC

Millim.
682.03
684.52

687.02
689.53
692.04

694.56
697.08
699.61
702.15
704.70

707.26
709.82

712.39
714.97

717.56

720.15
722.75
725.35
727.96
730.58

733.21
735.85
738.50
741.16
743.83

746.50
749.18
751.87
754.57
757.28

760.00
762.73
765.46

768.20
770.95

773.71
776.48
719.26

0.

782.04
781.83
787.63

1.

Millim.
682.28
684.77
687.27
689.78
692.29

694.81
697.33
699.86
702.40
704.96

707.52
710.08
712.65
715.22
717.82

720.41
723.01
725.61
728.22
730.84

733.47
736.11
738.77
741.43
744.10

746.77
749.45
752.14
754.84
757.55

760.27
763.00
765.73
768.47
771.23

773.99
776.76
779.54
782.32
785.11
787.91

1.

2.

2.

Millim.
682.53
685.02
687.52
690.03
692.54

695.06
697.59
700.12
702.66
705.21

707.77
710.33
712.91
715.49
718.08

720.67
723.27
725.87
728.48
731.11

733.74
736.38
739.03
741.69
744.36

717.04
749.72
752.41
755.11
757.82

760.55
763.28
766.01
768.75
771.50

774.26
777.04
779.82
782.60
785.39
788.19

3.

Millim.
682.78
685.27
687.77
690.28
692.80

695.32
697.84
700.37
702.91
705.47

708.03
710.59
713.16
715.75

718.34

720.93
723.53
726.13
728.75
731.37

734.00
736.64
739.30
741.96
744.63

747.30
749.99
752.68

755.38
758.10

760.82
763.55
766.28
769.02
771.78

T7454
777.31
780.09
782.88
785.67
788.47

Be

441

4.

Millim.
683.03
685.52
688.02
690.53
693.05

695.57
698.09
700.63
703.17
705.72

708.28
710.85
713.42
716.01
718.60

721.19
723.79
726.39
729.01
731.63

734.27
736.91
739.56
742.23
744.90

TAT.57
750.26
752.95
755.65
758.37

761.09
763.82
766.56
769.30
772.05

774.82
777.59
780.37
783.16
785.95
788.75

101

Hundredths of a Degree.

5.

Millim.
683.27
685.77
688.27
690.78
693.30

695.82
698.34
700.88
703.42
705.98

708.54
711.10
713.68
716.26
718.85

721.45
724.05
726.65
729.27
731.89

734.53
737.17
739.83
742.49
745.16

747.84
750.52
753.22
759.92
758.64

761.36
764.09
766.83
769.57
772.33

775.09
777.87
780.65
783.43
786.23
789.03

6.

7

Millim. Millim.
683.52 | 683.77

686.02
688.53
691.04
693.55

696.07
698.60
701.13
703.68
706.24

708.80
711.36
713.94
716.52
719.11

721.71
724.31
726.92
729.53
732.16

734.79
737.44
740.10
742.76
745.43

748.11
750.79
753.49
756.20
758.91

761.64
764.37
767.10
769.85
772.61

775.37
778.15
780.93
783.71
786.51
789.31

6.

686.27
688.78
691.
693.80

bho +) bb

©

696.32
698.85
701.39
703.93
706.49

709.05
711.62
714.20
716.78
719.37

8.

Millim.

684.02
686.52
689.03
691.54
694.06

696.58
699.10
701.64
704.19
706.75

709.31
711.88
714.45
717.04
719.63

722.23
724.83
727.44
730.06
732.68

735.32
737.97
740.63
743.30
745.97

748.64
751.33
754.03
756.74
759.46

762.18
764.91
767.65
770.40
773.16

775.93
778.70
781.48
784.27
787.07
789.87

8.

PRESSURES CORRESPONDING TO TEMPERATURES OF BOILING WATER.

9.

Millim.
684.27
686.77
689.28
691.79
694.31

696.83
699.36
701.90
704.44
707.00

709.56
712.13
714.71
717.30
719.89

722.49
725.09
727.70
730.32
732.95

735.59
738.23
740.89
743.56
746.23

748.91
751.60
754.30
757.01
759.73

762.46
765.19
767.93
770.67
773.43

776.20
778.98

781.76 |

784.55
787.35
790.15

9.

442

TAREE xXoxeve

BAROMETRIC PRESSURES CORRESPONDING TO TEMPERATURES OF THE
BOILING POINT OF WATER,

EXPRESSED IN MILLIMETRES OF MERCURY FOR CENTIGRADE TEMPERATURES.

By ReGNAULT, REVISED By Moritz.

Boling | Bermmcter | ninee. || Botts | Barometer | ping. | Boling | Barometer | gn
| Centigrade. Millimetres. ence | Centigrade. Millimetres. See || Centigrade.| Millimetres. aor:
| oO | ° Oo
| 80.0 | 354.62 sae 83.0 400.07 sa 86.0 450.30 ae
|| 80.1 356.06 vps 83.1 401.66 +66 86.1 452.06 a!
|| 80.2 357.50 ie 83.2 403.26 ae 86.2 453.83 ae
| 80.3 358.96 el 888 404.87 ve | 86:8 455.60 eek
| 80.4 360.41 83.4 406.48 ; 86.4 457.38 "
| 1.46 1.62 1.78
|

80.5 361.87 ae 83.5 408.10 he 86.5 459.17 te
| 80.6 363.34 Re 83.6 409.72 a 86.6 460.96 i
| 80.7 364.81 a 83.7 411.35 ees 86.7 462.75 in
| 80.8 366.29 ith 83.8 412.98 Beet 86.8 464.55 Ma
| 80.9 367.77 83.9 414.62 86.9 466.36
|| 1.49 1.64 1.81
|
| 81.0 369.26 84.0 416.26 87.0 468.17
| es 1.49 1.65 1.82

8t.1 370.75 a 84.1 417-91 ae 87.1 469.99 1:

81.2 372.25 oe 84.2 419.57 ae 87.2 471.82 es

81.3 373.75 84.3 421.23 — 87.3 473.65 Ae

81.4 375.25 : 84.4 422.89 ; 87.4 475.49 ;

1.51 1.67 1.84

81.5 376.77 84.5 424.56 87.5 477.33

1.52 A 1.68 1.85
S16 378.28 84.6 426.24 87.6 479.18
1.52 1.68 1.86

81.7 379.81 , 84.7 427.92 Ee 87.7 481.04 aoe

81.8 381.33 Sat 84.8 429.61 a 87.8 482.90 ae

81.9 382.87 84.9 431.30 87.9 484.76 Bi

1.54 1.70 1.87

82.0 384.40 ate 85.0 433.00 ee 88.0 486.64 2h

82.1 385.95 A 85.1 434.71 ie 88.1 488.52 tie

82.2 387.49 is 85.2 436.42 He 88.2 490.40 Ps

82.3 | 389.05 vr | 83-3 | 438.13 v2 || 88:3 | 492.29 a

82.4 390.61 i 85.4 439.85 . 88.4 494.19 ;

1.56 1.73 1.90

82.5 392.17 85.5 441.58 88.5 496.09

9 1.57 1.73 1.91

82.6 393.74 te 85.6 443.31 16 88.6 498.00 a

82.7 395.31 ev 85.5 445.05 eS lie ar 500.92 i

82.8 396.89 Vis 85.8 446.80 = 88.8 501.84 i

82.9 398.48 nO as 448.55 aa ae 503.77. | 1°93

83.0 | 400.07 86.0 | 450.30 ™ i 89.0 | 505.70 ee

D 102

BAROMETRIC PRESSURES CORRESPONDING TO THE BOILING POINT.

H

Q

e

Boili B ter ; Boiling Barometer . Boiling Barometer :
Poi wee Be Der: Point, in Tie ~ ji] Point, in peg
Centigrade.} Millimetres. : Centigrade.| Millimetres. "|| Centigrade} Millimetres.
° fo] °
89.0 505.70 93.0 588.33 97.0 681.93
5 1.94 = 2.20 2.49
89.1 507.65 ss) 93.1 590.53 ae 97.1 684.42 ey
89.2 509.59 4 93.2 592.74 : 97.2 686.92 ri
1.95 2.22 2.51
89.3 511.54 ee 93.3 594.96 ae 97.3 689.42 ae
89.4 513.50 z 93.4 597.18 : 97.4 691.94 ar
1.97 2.23 oe
|
| 89.5 Billa etia 93.5 599.41 97.5 694.46 ;
1.97 2.24 Jos
| 89.6 517.44 93.6 601.65 97.6 696.98 i
1.98 2.24 9.54
89.7 519.42 93.7 603.89 97.7 699.52
1.95 2.25 2.54
89.8 521.40 me 93.8 606.14 aaa 97.8 702.06 4008
89.9 523.39 ; 93.9 608.40 Bt WS 97.9 704.62 ate
2.00 2.26 | - 9.56
90.0 525.39 ae 94.0 610.66 ae | 98.0 707.17 Pe
90.1 527.40 aa 94.1 612-93 a | 98.1 709.74 et
90.2 529.41 : 94.2 615.21 ree itt dso 712.31 in
2.02 2.29 9.58
90.3 531.42 94.3 617.50 || 98.3 714.90
2.02 2.29 2.59
90.4 533.44 94.4 619.79 | 98.4 717.49
2.63 2.30 | 2.60
90.5 535.47 ae 94.5 622.09 oa1 | 285 720.08 Pe
90.6 537.51 ; 94.6 624.39 “i 98.6 722.69 ;
5 2.04 Soi al 2.61
90.7 539.55 94.7 626.71 98.7 725.30
2.05 2.32 2.62
90.8 541.60 rae 94.8 629.93 i 98.8 727.93 ea
90.9 543.65 a 94.9 631.36 iH 98.9 730.55
2.06 2.33 2.64
91.0 545.71 a 95.0 633.69 a 99.0 733.19 aa
91.1 547.78 of | 95.1 636.03 oF 99.1 735.84 ae
91.2 5419.86 Pig 95. 638.38 see 99.2 738.49 wa
91.3 551.94 ee 5 640.74 a 99.3 741.15 ae
91.4 554.03 ; 95.4 643.10 - 99.4 743.82 aa
2.09 2.37 2.68
91.5 556.12 ae 95.5 645.48 ee 99.5 7416.50 ao
91.6 558.22 eu 95.6 647.86 hie 99.6 749.18 a
91.7 560.33 3 95.7 650.24 ‘ 99.7 751.87 5
2.11 J 2.39 | Ep the 2.70
91.8 562.44 95.8 652.63 | 99.8 %5A.57
2 9.12 s= 2.40 | ie 2.71
91.9 564.56 95.9 655.04 99.9 757.28
2.13 2.41 2.72
92.0 566.69 96.0 657.44 100.0 760.00
' velit 4 2.42 alice
92.1 568.82 - 96.1 659.86 aaa || 100-1 762.73 Me
92.2 570.96 oA O62 662.28 i 100.2 765.46 ie
2.15 | 9.43 2.74
92.3 573.11 oe 96.3 664.71 aay |) 1003 768.20 oe
92.4 575.27 a 96.4 667.15 : 100.4 770.95 si
2.16 | 2.44 2.76
92.5 577.43 96.5 669.59 100.5 773.71
2.17 s 2.45 2.77
92.6 579.59 es 96.6 672.05 re 100.6 176.47 au
92.7 581.77 me | 96.7 674.51 eo 100.7 779.25 am
92.8 583.95 : 96.8 676.97 ; 100.8 782.03 4
2.19 2.47 2.79
92.9 586.14 ae 96.9 679.45 aaa || 100-9 784.82 ae
93.0 583.33 : 97.0 681.93 , 101.0 787.62 j
D 102

444

TAB Ia Bi XX Vels

BAROMETRIC PRESSURES CORRESPONDING TO TEMPERATURES OF THE
BOILING POINT OF WATER,

EXPRESSED IN

ENGLISH INCHES FOR TEMPERATURES OF FAHRENHEIT.

REDUCED FROM REGNAULT’S TABLE, REVISED BY MORITZ.

: Barom- sh Barom- | a Barom- < Barom-
vane | ian | Biter eae] Gaé | Ditler-|| aime] Sek | piger | Boee | Ser | iter
| Fahren.{ English | "°° | Fahren.| English | ©"°® ||/Fahren.| English | °"°® || Fabren.} English | °2°°
| Inches. Inches. | Inches. Inches.
| oO | Oo | Oo °
185.0 | 17.048 bane | 188.0 | 18.195 Fane 191.0 | 19.407 | oe 194.0 | 20.685 bs
185.1 | 17.085 ps || 188.1 | 18.235 “x6 1 191.1 | 19.448 | is 194.1 | 20.729 i
eVo Ve | . i .
|| 185.2 | 17.122 he 188.2 | 18.274 weet 191.2 | 19.490 | Se 194.2 | 20.773 oe
185.3 | 17.160 ie | 188.3 | 18.314 an 191.3 | 19.532 ne 194.3 | 20.817 oe
Toe OU TIOT | oh 188.4 18-853 | aa MOTEL WO Bsn! 194.4] 20.861 | °
038 | -040 | 042 -044
| 185.5 | 17.235 a | 188.5 | 18.393 aii 191.5 | 19.615 ie 194.5 | 20.905 4
| 18526 | 17.272. |. ~~ 1188.6 1 18.432 | ~ 191.6] 19.657 | ~~ || 194.6] 20.949 | °
1] -038 040 042 044
185.7 | 17.310 iG 188.7 | 18.472 sah 191.7 | 19.699 ae 194.7 | 20.993 we
|| 185.8 | 17.348 ie | 188.8 | 18.512 aie 191.8 | 19.741 oe | 194.8 | 21.038 Ley
185.9 | 17.355 | ~ || 188.9 | 18.552 | ~ || 191.9 | 19.783 | ~ 194.9} 21.082 |“?
038 || -040 012 044
| 186.0 | 17.423 |, 189.0 ] 18.592 192.0 | 19.825 || 195.0 | 21.126
x 028 || -040 é 042 a 045
186.1 | 17.461 ae oil 189.1 | 18.632 en 192.1 | 19.868 se 195.1 | 21.171 ee
186.2 | 17.499 ae || 189.2 | 18.672 ae 192.2 | 19.910 ‘ots 195.2 | 21.216 a
Bs | . . De) || . 5
|| 186.3 | 17.537 | 189.3 | 18.712 192.3 | 19.952 195.3 | 21.260 ee
|| 0 -038 4 e -040 | 2 +042 5 es 2045
186.4 | 17.575 189.4 ] 18.753 || 192.4] 19.995 195.4 | 21.305
038 -040 || 043 || -045
186.5 |] 17.614 ah | 189.5 | 18.793 a 192.5 | 20.037 NG 195.5 | 21.350 i
186.6 | 17.652 |, | 189.6] 18.833 | ©) | | 192.6 | 20.080 | "| | 195.6 | 21.395 a
| 186.7] 17.690 | ~~ || 189.7] 18.874 | © | 192.7 | 20.128 | “°° |] 195.7 | 21.440 | 724°
| 3038.) |e -041 -043 is 045
186.8 | 17.729 ao | 189.8 | 18.914 <a 192.8 | 20.166 ae | 195.8 | 21.485 a
|| 186.9 ]17.767 | “|| 189.9] 18.955 | ~ 192.9 | 20.208 | ~ | 195.9 | 21.530 | “?
| 20239 | 041 043 || 0045
187.0 | 17.806 ae 190.0 | 18.996 ie 193.0 | 20.251 aN 196.0 | 21.576 Ha
187.1 | 17.814 | ~~~ || 190.1] 19-036 | © 193.1 | 20.2914 | ~ 196.1] 21.621 | *—
Z 039 || 041 | 043 04d
187.2 | 17.883 190.2 | 19.077 || 193.2 | 20.338 || 196.2 | 21.666
x 039 041 | z 043 046
|| 187.3 | 17.922 nk | 190.3 | 19.118 at 193.3 | 20.381 ae 196.3 | 21.712 ee
137.4] 17.961 | ~ | 190.4] 19.159 | ~ || 193.4] 20.421) “~~ || 196.4] 21.758 | ~
039 | O41 -043 046
187.5 | 18.000 | 190.5 | 19.200 ae 193.5 | 20.467 Ol 196.5 | 21.803 Be
187.6 | 18.039 ye | 190.6 | 19.241 i 193.6 | 20.511 ae 196.6 | 21.849 ie
|| 187.7 | 18.078 i 190.7 | 19.283 gu 193.7 | 20.554 ae 196.7 | 21.895 ee
USI |! . . | .
187.8 | 18.117 | 190.8 | 19.324 193.8 | 20.598 196.8 | 21.941
039 & 041 «044 -046
187.9 | 18.156 pane 190.9 | 19.365 hia 193.9 | 20.641 oe 196.9 | 21.987 ne
| 188.0 | 18.195 | °" || 191.0 | 19.407 | °°°*" |] 194.0 | 20.685 | °"°"* || 197.0 | 22.023 | °°
D 104

BAROMETRIC PRESSURES CORRESPONDING TO THE BOILING POINT.

445

Barom- | | Barcom- a Barom- is “ sea
Boili te soe Boili eter . oiling eter “fap. | Boiling eter ne
Point. ‘in. ie Point, in Pier eBay teeing 7 |) Pier Point, | in Pe
Fahren.}] Eaglish | Fabren.| English Fahren.| English Fahren.}| English
Inches Inches. Inches. Inches.
fe) | ° fo) °
197.0 | 22.033 201.0 | 23.943 205.0 | 25.990 209.0 | 28.180
0.046 || 0.049 | a 0.053 |) - 0.057
197.1 | 22.079 | 7), | 201-1 | 23.993 | 7) | 205-1] 26.043 | "|| 209.1] 28.237 |
197.2 | 22.125 ne || 201.2 | 24.042 pate || 205.2 | 26.096 iat | 209.2 | 28.293 i
197.3 | 22.172 Se || 201.3 | 24.092 0 || 205.3 | 26.149 ce | 209.3 | 28.350 064
197.4] 22.218 | * 201.4 | 24,142 | ©" | 205.4] 26 202 | ~~ || 209.4 | 28.407
2046 -050 2053 2057
197.5 | 22.264 | 201.5 | 24.191 | 205.5 | 26.255 209.5 | 28.464
-047 -050 Se -053 || -057
197.6 | 22-311 | 1) | 201.6) 24.241 | ©) | 205.6 | 26.309 | * | 209.6 | 28.521 | 7
197.7 | 22.358 aa | 201.7 | 24.291 nen || 205.7 | 26.362 | © || 209.7 | 28.579 ae
197.8 | 22.404 | 7) | 201.8 | 24.341 ne | 205.8 | 26.416 ae 209.8 | 28.636 | *
197.9 | 22.451 | “| | 201.9] 24.391 | ~° || 205.9 | 26.470 | * 209.9 | 28.693 | °°
047 |! -050 -054 058
198.0 | 22.498 202.0 | 24.442 __ || 206.0 | 26.523 210.0 | 28.751
cee 047 || 050 | L 054 058
1981} 22.545 | 7) | 202.1) 24.492 | 7) | 206.1 | 26.577 | “|| 210.1} 28.809 |
198.2 | 22.592 ee | 202.2] 21.542 | “| 206.2 | 26.631 ek 210.2 | 28.866 ee
. | eV . .
198.3 | 22.639 i | 202.8 | 24.593 | 7). | 206.3 | 26.685 a: 210.3 | 28.924 | 7
198.4 | 22.686 | *" fa 24.644 | °° |] 206.4] 26.740 | °°” |! 210.4] 28.982 | “°
047 051 +054 058
198.5 | 22.731 | 202.5 | 24.694 '| 206.5 | 26.794 210.5 | 29.040
| 047 || Bel aoa ya |e 054 || -058
198.6 | 22.781 | (| |) 202.6 | 24.745 | "| 206.6 | 26.848 | “| 210.6 | 29.098 |
. \| Vo | . VE
198.7 | 22.829 ve | 202.7 | 24.796 | "| 206.7 | 26.903 a (210.7 | 29.156 |
198.8 | 22.576 | * "> || 202.8] 24.847 | “°°: || 206.8] 26.957 | “°°? | 210.8} 29.215 | “°°
x ; 048 |! ; 2051 | E , +055 pate’ .058
198.9 | 22.924 | | 202.9 | 24.898 '| 206.9 | 27.012 | 210.9 | 29.273
048 || 051 | 2055 || .059
| | | '
| 199.0 | 22.971 | | 203.0 | 24.9149 | 207.0 | 27.066 211.0 | 29.331
| 048 y s 051 | 055 |) -059
| 199.1] 23.019 |") | 203-1] 25.000 | 7) | 207-1] 27.121 | “| 211.1] 29.390)
199.2 | 23.067 | "| 203.2 | 25.051 Bs | 207.2 | 27.176 Fis | 211.2 | 29.449 pee |
(199.3) 23.115 | 7) | 203.3 | 25.103 ae || 207.3 | 27.231 a 211.3 | 29.508 re |
| 199.4 | 23.168 | “7° || 203.4 | 25.154 | ~°" |] 207.4] 27.286 | ©” | 211.4] 29.566) °°
| , | 043 |! ad 045 |! 059
|
(199.5 ] 23.211). | 208.5) 25.206 | | 207.5) 27.341 | | 211.5 | 29.625 sie
199.6 | 23.259 | "| 203.6 | 25.257 | "|| 207.6 | 27.397 sate 211.6 | 29.684 mes
199.7 | 23.308 | | 203.7 | 25.309 oe 207.7 | 27.452 ie 211.7 | 29.744 ats
199.8 | 23.356 | “| 203.8) 25.361 | | | 207.8] 27.507 | © | 211.8 | 29.803 ae
| 199.9 | 23.405 | °°"? || 203.9 | 25.413 | “~?” | 207.9 | 27.568 °”” | 211.9 | 29.862 2
049 |, 2052 2056 | 059
200.0 | 23.453 ||, | 204.0 | 25.465 | || 208.0) 27.618 | | 212.0] 29.922)
| 200.1 | 23.502 | “~ | 204.1 | 25.517] °” || 208.1] 27.671 | ° 212.1 | 29.981 | —
| .049 |i ay 052 | 056 || 060
200.2 | 23.550 | “9, | 204.2] 25.569 | “| || 208.2) 27.730 | 7 | 212.21 30.041)
200.3 | 23.599 te | 204.3 | 25.621 ae '| 208.3 | 27.786 <f || 212.3 | 30.101 a
Pook | 23618) | 7 | 204.025.678) 9 | 208.4 | 27.842 | 2: 1912.4 | 20.161. | —
1049 | 2052 | +056 || -060
i |
200.5 | 23.697 | || 204.5) 25.726 | || 208.5) 27.898 | 212.5 | 30.221 ee
200.6 | 23.746 ne | 204.6 | 25.779 ee || 208.6 | 27.954 ae | 212.6 30.281 ae
200.7 | 23.795 a |, 204.7 | 25.831 a '| 208.7 | 28.011 st | 212.7 | 30.341 ee
200.8 | 23.845 oi ' 204.8 | 25.884 ees | 208.8 | 28.067 es | 212.8 | 30.401 oe
200.9 | 23.894 Rie | 204.9 | 25.937 ye | 208.9 | 28.123 Rae 212.9 30.461 ee
201.0 | 23.913 | * 205.0 | 25.990 |” ” [ Beast 28.180 | ° | 213.0 30.522 | ~
D 105

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1

447

METEOROLOGICAL AND PHYSICAL TABLES.
GEOGRAPHICAL MEASURES,

SERIES V.

AN APPENDIX TO THE HYPSOMETRIC TABLES.

TABLES

FOR COMPARING THE MOST IMPORTANT GEOGRAPHICAL
MEASURES OF LENGTH AND OF SURFACE.

a) TABLES FOR COMPARING THE MOST IMPORTANT MEASURES OF LENGTH USED FOR INDICATING
ALTITUDES.

b) TABLES FOR COMPARING THE MOST IMPORTANT MEASURES OF GEOGRAPHICAL DISTANCES.

c) TABLES FOR COMPARING THE MOST IMPORTANT MEASURES OF GEOGRAPHICAL SURFACES.

yeh

V1
iy Me

A ae

449

e) TABLES

FOR

COMPARING THE MOST IMPORTANT MEASURES OF LENGTH USED FOR
INDICATING ALTITUDES.

Dy BEIHAT
eh be |

Eth BENNER, CHART et TRIM HF

SEGUTIELA WARE SRERE, -

TABLES FOR COMPARING THE MOST IMPORTANT MEASURES OF LENGTH USED

451

CHO Ne ene Ss

(The figures refer to the folio at the bottom of the page.)

FOR INDICATING ALTITUDES.

On the Various Standards of Measure, and their Relations ;

PAGE

(

Comparison of the Measures of Length most generally used for indicating Altitudes.

TABLE ie

oe

co

“ce

“ce

ee

66

6c

ce

6b

66

oe

“cc

“cé

oe

n
.

66

ee

II.
Til.
IV.

We
VI.
VIE
VIII.
IX.

For converting Paris or French Feet into different Measures.

xe
XI.
XII.
XITI.
Ove

For converting English Yards and Feet into different Measures.

ey.
MeV.
XVII.
SOVATT:
SSE
xX.

E

Conversion of French Toises into Metres $
Conversion of French Toises into Paris Feet .
Conversion of French Toises into English Feet
Conversion of French Toises into Rhine Feet.

For converting Metres into different Measures.

Conversion of Metres into Toises. . § ‘
Conversion of Metres into Paris Feet . i ‘
Conversion of Metres into English Feet . :

Conversion of Metres into Rhine or Prussian Feet
Conversion of Metres into Feet of Vienna <

Conversion of Paris Feet into Toises . j :
Conversion of Paris Feet into Metres. :
Conversion of Paris Feet into English Feet
Conversion of Paris Feet into Rhine Feet ‘

Conversion of Paris Feet into Feet of Vienna .

Conversion of English Yards into French Toises

Conversion of English Yards into Metres . :
Conversion of English Feet into Metres . :
Conversion of English Feet into Paris Feet 3

Conversion of English Feet into Rhine Feet .
Conversion of English Feet into Feet of Vienna.

5

14
14
lo
15

29
30)
31
32

9o
30

34

30

TABLE

CONTENTS.

For converting Klafter and Feet of Vienna into different Measures.

SET.
XXII.
XXIII.
KOSI
XXYV.
> DQG
»,©.Q "00

Conversion of Klafter of Vienna into Metres. ‘ ‘
Klafter of Vienna into Paris Feet. :
of Klatter of Vienna into English Feet.

Feet of
of Feet of Vienna into Paris Feet

of

Conversion of

Conversion

Conversion of Vienna into Metres F

Conversion

Conversion of Feet of Vienna into English Feet

of Feet of Vienna into Rhine Feet

Conversion

For converting Rhine or Prussian Feet into different Measures.

SOx:
XOXTX.
XXX.
XXXI.
XXXII.
XXXIII.

Conversion of Rhine Feet into French Toises 2
Conversion of Rhine Feet into Metres ; : 4 2
Conversion of Rhine Feet into Paris Feet - ; ,
Conversion of Rhine Feet into English Feet é ‘ $
Conversion of Rhine Feet into Feet of Vienna 3 ‘
Conversion of Bavarian Feet into Metres . ‘ ‘ s

PAGE
39
40
40
41
42
45
44

47
47

For converting Spanish, Mexican, and Bolivian Varas and Feet into different

“ce

66

66

66

.

‘

.

‘

66

oe

6s

XXXIV.
XXX V:
XXXVI.
XXXVIT.
XXXVIII.
XXXIX.
XL.

XLI.

Measures.

Conversion of Old Spanish or Castilian Varas into Metres
Conversion of Old Spanish Feet into Metres : $ 5
Conversion of Mexican Varas into Metres 2 6 ;
Conversion of Mexican Feet into Metres. ; z 5
Conversion of Mexican Feet into English Feet : :
Conversion of Bolivian Varas into Metres . : B
Conversion of Bolivian Feet into Metres : 4 4
Conversion of Bolivian Feet into English Feet . ‘ °

For converting Fractional Parts of a Toise and of a Foot into each other.

XLII.
XLITI.
XLIV.
XLV.
XLVI.

XLVII.
XLVITI.

XLIX
E

Conversion of Inches into Duodecimal Lines . A ¢
Conversion of Decimals of a Toise into Feet and Inches .
Conversion of Decimals of a Foot into Inches and Deci-

mals. , : ; ; 5 A A 4 3
Conversion of Decimals of a Foot into Inches and Duo-

decimal Lines . : ; i , 4 ‘ :
Conversion of Inches and Duodecimal Lines into Decimals

of a Foot . : ‘ é : ; . f .

Table for comparing the most important Measures of Length
Table for the conversion of English Fathoms into Metres
Table for the conversion of Metres into English Fathoms .

6

48
48
49
49
49
30
50
50

ol
ol

o2
52
52
53

o4
547

453

COMPARISON

OF THE

MEASURES OF LENGTH MOST GENERALLY USED FOR INDICATING ALTITUDES.

Ir is too well known that the measures used in scientific researches among civilized
nations are not uniform, as the convenience of all would require. In France the
nietre is employed; in England and North America, the yard and its third part, the
English foot; in Germany, most commonly, the Old French or Paris foot, the sixth
part of the French toise called the Zocvse du Pérou; at the same time, however,
though not so extensively, the Rhine foot, in Denmark and Holland, and especially
in Prussia, where it has been declared, under the name of Prussian foot, the legal
measure in that kingdom; in Austria, the klafter of Vienna and its sixth part, the
foot of Vienna; in Switzerland, the Swiss or federal foot, which has been adjusted
to the metrical system, and is three-tenths of a metre; and so on.

The numerous altitudes ascertained, either by private efforts, or in connection
with the public works, and especially with the extensive geodetic operations carried
on by the governments of these various countries for the survey of a regular map,
are expressed in the measures respectively adopted by each of them. These heights,
however, before they can be compared, require to be uniformly reduced to one
of these measures. ‘Their relation to each other, therefore, is given here, together
with numerous reduction tables, designed to save both the useless expenditure of time
and the almost unavoidable errors arising from so numerous reductions.

The exact relation of the standard measures above mentioned is not easily ascer-
tained, and the numbers given by the best authorities by no means always agree ;
for the manufacture of exact copies of a standard scale, and the accurate comparison
of it, require considerable skill, and belong to the most delicate operations of physics.
The numbers used for computing the following tables have been adopted, after a
careful review of the authorities, as the most reliable. A few words on the most
important original legal standards of measures may not be unwelcome. For further
details on the subject the reader is referred principally to Dove’s work, Maas und
Messen, 2d edition, Berlin, 1835.

The principal original, legal standards are the following :—

1. The Torse du Pérou, the old French standard, made in 1735, in Paris, by Lan-
glois, under the direction of Godin, is a bar of iron which has its standard length at
the temperature of 13° Réaumur. It is known as the Toise du Pérou, because it was
used by the French Academicians Bouguer and La Condamine in their measurement

E 7

454 COMPARISON OF THE VARIOUS MEASURES OF LENGTH

of an are of the meridian in Peru. What follows will show that it may almost
be called the only common standard, to which all the others are referred for com-
parison.

2. The Métre is a standard bar of platina, made by Lenoir in Paris, which has its
normal length at the temperature of zero Centigrade, or the freezing point. Its
length is intended to make it a natural standard, and to represent the ten-millionth
part of the terrestrial are comprised between the equator and the pole, or of a quarter
of the meridian. The length of this are given by the measurement, ordered for the
purpose by the Assemblée Nationale, of the are of the meridian between Barcelona,
through France, to Dunkirk, combined with the measurements previously made in
Peru and in Lapland, gave for the distance of the equator from the pole 5,130,740
toises, with an ellipticity of 51,, and for the length of the metre 443.29596 lines of
the toise du Pérou, assumed to be 448.296 lines, or 3 feet 11.296 lines. This last
quantity was declared in 1799 to be the length of the legal metre, and vraz et
définitif, and is the length of Lenoir’s platina standard. Later, and more extensive
measurements in various parts of the globe, however, seem to indicate that this
quantity is somewhat too small. The results of these various measurements, care-
fully combined and computed by Bessel, would make the quarter of the meridian
10,000,856 metres, and the metre = 443.29979 Paris lines; Schmidt’s computation
would make it 445.29977 lines, and both numbers are confirmed by Airy’s results.
The legal metre is thus, in fact, as Dove remarks, a legalized part of the toise du
Pérou, and this last remains the primitive standard. But it must be added that a
natural standard, in the absolute sense of the word, is a utopian one, which ever-
changing Nature never will give us. The metre is, for all practical purposes, what
it was intended to be, a natural standard; though it must be confessed that, in
practice, the question is not whether, and how far, a standard is a natural or a con-
ventional one, but how readily and accurately it can be obtained, or recovered when
lost.

3. The English Standard Yard is a brass bar, made by Bird in 1760, which was
declared, by act of Parliament, lst May, 1825, the legal measure of length when at
the temperature of 62° Fahrenheit, under the name of Jmperial Standard. Another
standard, sometimes also called Parliamentary Standard, was made by Bird in 1758.
Sir George Shuckburgh found both to be nearly identical, at least within 0.0002 of
an inch. (Philos, Trans. for 1798, p. 170.) ,

Another scale of brass, however, made by Troughton for Sir George Shuckburgh,
described in the Philosophical Transactions for 1798, and known as Shuckburgh’s
scale, obtained among scientific men, perhaps, a higher degree of authority, on
account of the great accuracy of its division, and of its apparatus, devised by
Troughton, for delicate comparisons. The scale was used by Captain Kater, in
1818, in his researches for determining the length of the pendulum beating a second
at London, and also the length of the metre, expressed in English inches of the
imperial standard. (Philos. Trans. for 1818.)

Numerous attempts to determine the relation between the English and the French
measures show no inconsiderable discrepancies in their results. Omitting the older
comparisons with the toise, we give here the value of the metre in English imperial
inches as resulting from the most reliable comparisons.

KE 8

USED FOR INDICATING ALTITUDES. 455

A standard scale made and divided by Troughton, and in all particulars identical
with Shuckburgh’s scale, was brought to France in 1801 by Pictet. The comparison
of it with the standard metre, made by Prony, Legendre, and Méchain, gave, after
due reduction of the two standards to their respective normal temperatures,

1 metre at 32° Fahr. = 59.371 English imperial inches at 62° Fahr.

This determination was adopted for all reductions in Kelly’s Universal Cambist, and
in the French translation of the work, published in Paris in 1823.

A new comparison was made with great care by Captain H. Kater, in 1818. (See
Philos. Trans. for 1818, p. 103.) The standards used were a brass seale metre, by
’ Fortin, terminated with parallel planes (métre @ bouts), and a bar of platina on which
the length of the metre was marked by two very fine lines (métre a traits). Both
were compared with Shuckburgh’s scale, and a double series of experiments gave
as the mean result :—

Brass metre at 32° Fahr. = 39.37076 inches of Shuckburgh’s scale at 62° Fahr.
Platina metre at 82° Fahr. = 39.37081 * a es Ke

Mean 39.a7079 «6 “ 3 ‘“

On this value of the metre are based the reduction tables by Matthieu, published
yearly in the Annuaire du Bureau des Longitudes ; and it has come into general
use, both in Europe and in this country.

Captain Kater gives besides, in the same paper, p. 109, note, the value of the
metre compared with Bird’s Parliamentary standard as being

1 metre at 32° F.= 39.37062 imp. inches of Bird’s Parliamentary standard at 62° F.

This value has been adopted by Dove, as being the legal one, in his reduction tables
in his work Maas und Messen, p. 175, etc., and by many German authorities.

According to Bailey’s experiments, made in 1835, when engaged in constructing a
new standard for the Royal Astronomical Society (Memoirs R, Ast. Soc., vol. ix.),
‘the value of the metre is (Lee, Collection of Tables and Formule, p. 62)

1 metre at 32° F. = 39.370092 imperial standard inches at 62° F.

The original legal standards having been lost in the fire which destroyed, in 1834,
the Parliament Houses, an act of Parliament provided for the construction of new
ones. An extensive and most careful comparison of the standards of length of
England, Belgium, Prussia, Russia, India, Australia, was made at the Ordnance
Survey office at Southampton by Capt. A. R. Clarke, R.E., under the direction
of Sir Henry James, Director, the results of which were published in London in
1866. -This comparison gives the relation of the imperial standard to the metre as

1 metre at 32° F. = 39.370488 inches of the imperial standard at 62° F.

The value adopted in computing the tables in this volume, before this last com-
parison was made, is that determined by Capt. Kater in 1818, viz. :—

1 metre at 82° F. = 39.37079 English inches of the imperial standard at 62° F.

The difference between these two equivalents of the metre is so small that, for
practical purposes, the substitution of Clarke’s value, implying such laborious com-

E 9

456 COMPARISON OF THE VARIOUS MEASURES OF LENGTH

putations, would hardly be justified. For the present, therefore, it seems best not
to introduce here this new value, which, after all, may not be a final one.

It may not be out of place to remark that Schumacher, in the first edition of his
Sammlung von Hiilfstafeln, used the value 1 metre = 39.3827 English inches, as
given in the Base du Systeme Métrique ; but this number, which expresses the rela-
tion of both standards when at the freezing point, becomes 39.37079 when they are
respectively reduced to their normal temperatures. Schumacher’s tables, therefore,
must be corrected accordingly.

4. The actual standard of length of the United States is a brass scale of eighty-

two inches in length, prepared for the Coast Survey of the United States, by Trough- .

ton of London, meant to be identical with the English Imperial Standard, and depos-
ited in the office of weights and measures. The temperature at which it is a standard
is 62° Fahrenheit, and the yard measure is traced between the 27th and 63d inches
of the scale. (See Report on the Construction and Distribution of Weights and
Measures, by Prof. A. D. Bache, 1857.)

Hassler, first Superintendent of the United States Coast Survey, made an elaborate
comparison of eleven different standard metres with the brass scale of eighty-two
inches, by Troughton. Three of the standard metres, certified to be correct by high
authorities, seem to deserve especial confidence: 1. An iron metre, presented to
Mr. Hassler by Tralles, which was one of the three that Tralles had made by Lenoir
at the same time with those distributed to the committee on the weights and measures.
2. Another metre of iron, also by Lenoir, verified by Bouvard and Arago, and de-
clared by them to be identical with the original. 3. A platina standard by Fortin
verified by Arago, and found to be 541, of a millimetre too long, for which error
allowance was made. Their comparison with the Troughton scale at the tempera-
ture of the freezing point gave :— |

1. Iron metre of Tralles = 39.3809171 inches of the Troughton scale.
2. Iron metre of Lenoir = 39.3799487 6 6“ 6
3. Platina metre of Fortin = 39.3804194 66 6 6

Or, correcting for expansion, and reducing them to their respective standard tem
peratures :—

1. Iron metre of Tralles at 32°-F. = 39.36850 } Eenelieh inches of the

2. Iron metre of Lenoir at 32° F. = 39.36754 Troughton scale of

3. Platina metre of Fortin at 32° F.= 39.36789 82 inches at 62° F.

Hassler, in his Report to Congress on Weights and Measures, in 1832, adopts
the first value, viz. :—

1 metre at 32° F.= 39.3809171 inches of the Troughton scale at 32° F.;
which reduced by Prof. A. Bache, his successor, by means of the coefficient of ex-
pansion by heat used by Hassler, became

1 metre at 82° = 39.36850535 United States standard inches at 62° F.

This scale and its metric equivalent was regarded as the United States standard
from which copies were to be made.

This value differs materially from those given by other careful comparisons,
while, on the other hand, the close accordance of the numbers corresponding to the

E 10

USED FOR INDICATING ALTITUDES, 457

various standard metres proved the accuracy of Hassler’s method of comparison.
But as the yard of the Troughton scale had been accepted as the standard of length
of the United States (see Report on Weiyhts and Measures, by Prot. Bache, 1857)
it seemed advisable to call it, as is done in the Coast Survey Reports, the American
yard, and its subdivisions, the American foot and inch, and to consider it as a new
standard similar to, but not identical with, the English imperial standard. (Coast
Survey Report tor 1853.)

In 1856, however, two copies of the new British standards, viz., a bronze stand-
ard, No. 11, and a wrought-iron standard, No. 57, were presented by the British
government to the United States. A series of elaborate comparisons of these new
standards with the Troughton scale of 82 inches were made from 1876-1878 by
Prof. J. E. Hilgard, now Superintendent of the Coast Survey, the results of which
were published in 1880, in Appendix No. 12, of Report for 1877. These researches
prove that, taking into account the influence of the nature of the material of the
standards, and using new, and more correct, coefficients for expansion by heat to
reduce them to the same temperature, no material difference is found to exist
between the American yard on the Troughton scale and the English imperial yard ;
only the Troughton scale at 62° F. is 0.00083 inch longer than the imperial yard at
62° F.; or, otherwise expressed, the mean yard of the United States at 59°.62 F.
is equal to the British standard yard at 62° F.

In confirmation of this conclusion it is well to remark that the value of the metre
derived from Hassler’s comparisons and reduced to 62° by Prof. Bache, as above
stated, when properly corrected with the new elements, stands as follows :—

Hassler’s value of the metre reduced to 62° F. = 39.36851 Eng. inches.
Correction for difference in rate of expansion + .00109 =
Correction for excess of Troughton scale in one metre + .00090 6
Hassler’s comparison corrected reduction = 39.37050 “

which is almost identical with Clarke’s value.

Thus the American yard, as a distinct one from the English standard yard, is
happily abolished. In consequence the tables for the conversion of the American
yards and feet have been omitted in the present edition.

5. The Alafter of Vienna isa silver line let into a prismatic bar of iron, on which
the length of the klafter was engraved by Voigtliinder. It has its normal length at
13° Réaumur, and was declared by law, in 1816, the standard Klafter of Vienna.
On the same silver line the French toise is marked, from the standard toise sent, in
1760, by La Caille and La Condamine to the Observatory of Vienna. Comparisons
made by Prof. Stampfer with this standard gave for its value in metres 1 Klafter of
Vienna = 1.8966657 metre, which value was universally used until about 1850.

New comparisons of the Vienna standard with various French standards deposited
in the Russian Imperial Observatory, made in 1850 by the Astronomer W. Struve,
with the utmost care and scientific precision, gave as a result

1 Klafter of Vienna = 1.8964843 metre,

which value is now admitted as the most reliable. (Memorrs of the Austrian
Academy of Sciences, vol. v. p. 117, and Sitzungs Berichte, Mathemut. Nutur-
E 1

458 COMPARISON OF THE VARIOUS MEASURES OF LENGTH

wissench. Klasse, vol. xliv.) Struve’s value has been adopted in computing the
tables in this edition.

6. The Prussian Foot is marked on a standard iron bar, 3 feet long, made by Pistor
in Berlin; it is a standard at the temperature of 13° Réaumur. ‘The length of the
Prussian foot was declared by law to be = 139.138 lines of the toise du Pérou.

7. Spain and the old Spanish Colonies of America. The French metrical
system of weights and measures was introduced into Spain by law in July, 1849;
but its introduction was only finished in 1859. The old measures, however, con-
tinued to have a considerable local significance. Among the different values assigned
to them the most important are those of the Castilian Vara, or Vara de Burgos,
and of the Castilian foot, the relation of which to the metre is given officially in the
Anuario de la Direccion de Hidrografia, Madrid, 1863, as tollows :—

1 Castilian foot — 0.278635 metre; hence
1 Castilian vara — 0.8359050 metre
1 Castilian foot — 0.9141732 English foot.

These values have been used in computing the tables in this fourth edition, in
preference to the older ones, from which the tables in the previous editions were
derived.

In the late Spanish Colonies of Mexico and South America the measures of the
mother country continued to be in use after their separation from it. But owing,
no doubt, to the imperfection of local standards, considerable divergences were
found to exist, which caused no little confusion in the practical use of these mea-
sures. To obviate this inconvenience some of the States, as Mexico in 1862, Chile
already in 1848, decreed the introduction of the French metric system. But as in
practice the people continued to use the old measures, most of the States found it
necessary to fix a legal value for the vara in relation to the metre. Thus Mexico
determined by law, in 1845, the legal value of the Mexican vara to be

1 vara = 03838 metre ; hence
1 Mexican foot = 0.2793333 .
1 Mexican foot = 0.9164645 English foot.

Guatemala, San Salvador, Honduras, Nicaragua, Costa Rica use the Mexican vara
and foot.

According to Col. T. Ondarza, one of the authors of the official map of Bolivia,
the Bolivian government has declared the value of the Spanish vara to be in the
ratio of 100 metres = 118 varas. This value was adopted by him in publishing
his altitudes. Thus

1 Bolivian vara = 1.18 metre; hence
1 Bolivian foot = 0.2824859 <¢

1 Bolivian foot = 0.92680776 English foot. :

Chile and Peru use the same value of the vara and foot as Bolivia. Venezuela,
New Granada, and Ecuador have adopted a value of the vara very nearly equal to
the old Castilian, viz. :—

1 vara = 0.836 metre.
1 foot = 0.278667 *«
EB 12

USED FOR INDICATING ALTITUDES. 459

New tables derived from the above values of the Spanish measures are given in
this edition instead of those found im the previous ones.
In the Argentine Confederation, the Spanish vara was made

1 Spanish vara = 0.866 metre ; hence
1 Spanish foot — 0.288667
1 Spanish foot = 0.9470703 English foot.
In Brazil the old Portuguese measures are still in force with only very slight
changes for adjustment to the metre.
1 palmo = 0.22000 metre.

1 vara, 5 palmos = 1.1000 metre or 1 metre = 3.030303 vara.
1 foot, Pé, 14 palmos = 0.33000 metre or 1 metre = 0.9090909 foot, Pé.

The above information on the old Spanish measures is gathered from Lehm’s
Geographisches Jahrbuch, Band I. and 11. The three general “Tables for com-
paring the most important measures of length, of distances, and of surface,” are
taken from the same source.

At the head of each table will be found the value from which it was computed.

The tables give directly the reduction of any whole number not exceeding four
figures, and Jarger numbers, within the limits needed for altitudes, by means of a
single addition.

Example.

Reduce 25,351 English feet into metres.
In Table XVII., on the line beginning with 25,000 and in the column headed

300, take for : 25,300 = 7711.30 metres.
In the second part of the table, on the line beginning
with 50, and in column headed 1, take for DL Loos 5

English feet 25,351 = 7726.84 “«
When Clarke’s spheroid (1866) is used—
~German mile zis equatorial degree = 7421.3802 metres, log 3.87048468
Nautical league ap equatorial degree — 5566.0351 metres, log 3.74554594
French league az equatorial degree — 4452.8281 metres, log 3.64863593
1 equatorial degree — 1855.3450 metres, log 3.26842469

2

Ok

Naut. or geog. mile =

The tables for the conversion of fathoms into metres, and for the conversion of
metres into fathoms, need the following explanation: The exact equivalent of any
desired depth in either measure between 100 and 9900 can be obtained directly from
the table ; for any depth below 100, the equivalent can be found by looking for the
value corresponding to the same number as though it were hundreds, and then remove |
the decimal point the required number of places to the left.

Example.
Reduce 62 fathoms to metres.
In the first line of the table under 600 we find 60 fathoms — 109.726 metres.
In the first line of the table under 200 we find 2 « Pood on
Therefore 62. « 118.3838
E 13:

|

I

460

TO CONVERT

ER ENC BO SEs

INTO DIFFERENT MEASURES OF LENGTH.

I. CONVERSION OF FRENCH TOISES INTO METRES.
1 Toise = 1.94903631 Metre.

Units.
Toises.
Tens 0. 1. 2. Be 4. d. 6. Te &8. 9.
Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres.
0 0.000 1.949} 38.898) 5.847| 7.796 9.745| 11.694) 13.643) 15.592) 17.541
10 19.490} 21.439) 23.388) 25.337) 27.287] 29.236] 31.185) 33.124| 35.073) 37.022
20 38.981] 40.930} 42.879) 44.828) 46.777] 48.726) 50.675! 52.624) 54.573) 56.522
30 58.471| 60.420) 62.569) 64.318) 66.267] 68.216) 70.165) 72.114] 74.063) 76.012
40 77.961| 79.911) 81.860) 83.809) 85.758] 87.707! 89.656) 91.605) 93.554) 95.503
50 97.452) 99.401 101.350) 103.299 105.248 | 107.197) 109.146 111.095/113.044/ 114.993
60 116.942 118.891 120.840 122.789 | 124.738 | 126.687) 128.636) 130.585) 132.534/ 134.484
70 136.433 138.382 140.331 142.280 144.229 146.178'148.127) 150.076) 152.025) 153.974
80 155.923 157.872 159.821) 161.770 163.719 165.668) 167.617 169.566 |171.515| 173.464
90 | 175.413 177.362 179.311 181.260 183.209] 185.158, 187.108 189.057| 191.006 192.955
Hundreds.
Thousands. |)~ * =
0. 100. | 200. | 300. | 400. | 500. | 600. | 700. | 800. | 900.
Metres. | Metres. | Metres | Metres. | Metres. | Metres. | Metres. | Metres | Metres. | Metres.
0 0.00) 194.90| 589.81) 584.71} 779.61 °974.52) 1169.42] 1364.33 | 1559.23] 1754.13
1000 1949.04 2143.94 2338.84 2533.75 2728.65 2923.55/3118.46 3312.36 3507.27 3702.17
2000 = }|3898.07/ 4092.98 4287.88 4452.78 4677.69 | 4872.59 5067.50 5262.40 5457.30 5652.21
3000 5847.11/6042.01 6236.92 6431.82 6626.72] 6821.63 | 7016.53 7211.44 7406.34 7601.24
4000 7796.15 7991.05 8185.95 8380.86 8575.76 8770.66 |8965.57| 9160.47 9355.38/| 9550.28
5000 9745.18 9940.09 | 10135.0) 10329.9 10524.8 10719.7| 10914.6|11109.5 | 11304.4|11499.3
II. CONVERSION OF TOISES INTO FRENCH OR PARIS FEET.
1 Toise = 6 French Feet
Units. wa
Toises. =
Te: Be | Bell ey eae ie. 6 ae a ee
Par Fcet |Par.Feet. |Par.Feet. | Par. Feet. |Par.Feet. | Par Feet. |Par.Feet. | Par. Feet Par Feet | Par Feet
0 0.00 6 12 18 24 30 36 42 48 54
10 60 66 72 78 84 90 96 102 108 114
20 120 126 132 138 144 150 156 162 168 174
30 180 186 192 198 204 210 216 222 228 234
40 240 246 252 258 264 27¢ 276 282 288 294
50 300 306 312 318 324 330 336 342 348 354
60 360 366 372 378 384 390 396 402 408 414
70 420 426 432 438 444 450 456 462 468 474
50 480 486 492 498 504 510 516 522 528 534
90 540 546 552 558 564 570 576 582 588 594

(14

II]. CONVERSION OF FRENCH TOISES INTO ENGLISH FEET AND DECIMALS, 461

1 Toise = 6.3945916 English Feet

Units.
Toises. - —

Tens. o | 1 | 2 | & | 4 | & | 6 | % | 8 | 9
Eng. feet| Eng. feet Eng. feet) Eng. feet|Eng. feet]Eng. feet|Eng. feet Eng. feet/Eng. feet|Eng. feet
0 0.000) 6.395) 12.789} 19.184) 25.578] 31.973) 38.368) 44.762) 51.157) 57.551
10 63.946] 70.340) 76.735) 83.130) 89.524] 95.919)102.313)108.708)115.103)121.497
20 127.892/134.286) 140.681) 147.076)153.470]159.865/166.259|172.654)179.049 185.443
30 | 191.838]198,232|204,627)211,021/217.416]233.811)230.205 236.600 242.994 249.389
40 —_||255.784|262.178|268.573|274.967|281.362]287.757|294.151|300.546|306.940/313.335
50 319.729|326.124/332.519|338.913/345.308]351.702)358.097|/364.492/370.886/377.281
60 383.675|390.070/396.485/402. 859/409.2541415.648/422.043/428.438)434.832)441.227
70 '447.621]454.016]460.410/466.805]473. 200]479.594)485.989/492.383|/498.778|505.173
| 80 511.567/517.962)524.356]530.751|537.146]543.540/549.935|556.329|562.724/569.119
90 575.513/581.908]588.3021594.6971601.0911607.486/613.881]620.275|626.670)633.064

i Hundreds.
Th ds. ee a aE = SS =e
=") 0, | 100. 200. | 300. | 400. | 500. | 600. | 700. | SOO. | 900.
\\Eng. feet| Eng. feet Wan feet Eng. feet|Eng. feet|Eug. feet/Eng. feet Bae feet| Eng. feet) Eng. feet
0 0.0 639.5| 1278.9] 1918.4) 2557.8] 3197.3} 3836.8) 4476.2} 5115.7) 5755.1
1000 6394.6) 7034.0] 7673.5} 8313.0] 8952.4] 9591.9|10231.3/10870.8)11510.3)12149.7
2000 12789.2)13428.6/14068.1|14707.6)15347.0]15986.5)16625.9|17265.4)17904.9/18544.3
3000 19183.8]19823.2/20462.7)21102.1/21741.6]22381.1/23020.5/23660.0|24299.4/24938.9
4000 25578.4/26217.8 BERT e oul 28136.2]28775.7|29415.1/30054.6|30694.0 31333.5
5000 + 1131972.9)32612.4 33251.9/33891.3 34530.8135170.2/35809.7/36449.2/37088.6)37728.1
IV. CONVERSION OF FRENCH TOISES INTO RHINE OR PRUSSIAN FEET.
1 Toise = 6.2100194 Rhine Feet.

Toises. Units. M ek pen Bi

Tens. 0. | I. O45 | De 4. De 6. “de 8. 9.
Rhine ft Rhine ft.|Rhine ft. Rhine ft. Rhine ft.]Rhine ft.| Rhine ft.| Rhine ft.|Rhine ft.|Rhine ft,
0 0.000 6.210 12.420, 18.630) 24.840] 31.050) 37.260| 43.470] 49.680) 55.890
10 62.100, 68.310} 74.520) 80.730} 86.940] 93.150) 99.360)/105.570)111.780|117.990
20 124.200 130.410 136.620) 142.830) 149.040]155.250/161.461/167.671)173.881|180.091
30 186.301 )192.511/198.721)204.931)/211.141]217.351)223.561|229.771)235.981/242.191
40 248.401 '254.611|260.821/267.031|273.241]279.451|285.661|291.871)298.081|304.29]
50 310.501 316.711|322.921/329.131/335.341]341.551|/347.761|353.971/360.181|/366.391
60 372.601 378.811 385.021/391.231/397.441]403.651/409.861/416.071/422.281)428,491
70 434.701 440.911)447.121)453.331/459.541]465.751|471.961/478.171/484. 382/490, 592
80 496.802 503.012 509.222'515.432/521.6421527.852/534.062)/540.272)546.482|/552.692
90 558.902 565.112 571.322/577.532/583. 7421589 .952/596.162)/602.372| 608. 582|614.792

Hundreds. $
Thousands. “9. | 100. | 200. | 300. | 400. | 500. | 600. | 700. | SOO. | 900.
Rhine ft.|Rhine ft.|Rhine ft.| Rhine ft.|Rhine ft.]Rhine ft [Rhine ft.|Rbine ft.|Rhine ft. Rhine ft.
0 0.0} 621.0) 1242.0) 1863.0) 2484.0] 3105.0) 3726.0) 4347.0} 4968.0) 5589.0
1000 6210.0) 6831.0} 7452.0! 8073.0] 8694.0] 9315.0) 9936.0)10570.0)11178.0)11799.0
2000 12420. 0}13041.0|13662.0|14283.0/14904.0}15525.0}16146.1|/16767.1\17388.1/18009.1
3000 /18630.1}19251.1/19872.1/20493.1/21114.1]21735.1)22356.1|22977.1/23598.1/24219.1
4000 24840.1 25461.1) 26082. 1) 26703. 1\27324. 1127945 .1)28566.1/29187.1/29808.1/30429.1
5000 31050.1/31671.1)32292.1 32913. 1)33534.1/34155.1/34776.1/35397.1/36018.1/36639.1
E 15

462

TO CONVERT

METRES

INTO DIFFERENT MEASURES OF LENGTH.

1 LEGAL METRE = 443.296 FRENCH OR PARIS LINES.

V. CONVERSION OF METRES INTO TOISES AND DECIMALS.

1 Metre = 0.518074074 Toise.

Metres.
Th ds. |
“em | @. | 100. | 200. | 300. | 400. | 500. | 600. | 700. | 800. | 900.
| Teisee eheines: Toises. Toises e Moiseae’ Dinetace: Varciees Tpisesss Tolaes: Toiseall
0 0.00 51.31] 102.61) 153.92) 205.23] 256.54) 307.84) 359.15| 410.46! 461.77

1000 513.07; 564.38] 615.69} 667.00) 718.30] 769.61) 820.92) 872.23) 923.53) 974.84
2000 1026.15 1077.46 | 1128.76) 1180.07) 1231.38 ]1282.69 1333.99] 1385.30| 1436.61 | 1487.91
3000 1539.22 /1590.53| 1641-84) 1693.14| 1744.45 ]1795.76) 1847.07)| 1898 37) 1949.68 | 2000.99
4000 2052.30) 2103.60 | 2154.91 | 2206.22) 2257.53 | 2308.83 | 2360.14|2411.45| 2462.76 2514.06

5000 2565.37 | 2616.68 | 2667.98 | 2719.29 | 2770.60]2821.91 | 2873.21 |2924.52)| 2975.83 | 3027.14
6000 3078.44 /3129.75| 3181.06 3232.37/3283.67]/3334.98 3386.29 | 3437.60|3488.90 3540.21
7000 3591.52 |3642.83 | 3694.13 | 3745.44 /3796.75 [3848.06 | 3899.36 | 3950.67/ 4001.98 | 4053.28
8000 4104.59 4155.90/ 4207.21 | 4258.51 | 4309.82] 1361.13 4412.44|4463.74/ 4515.05 | 4566.36
9000 4617.67 | 4668 .97|4720.28 | 4771.59 | 4822.90] 4874.20 4925.51| 4976.82) 5028.13 5079.43

Units.
Metres.
Tens
i 0. Bevchie Sovak Bava poe Say] acGeroleu¥eod sees! ae
Ja8, Toises. Toides. Toises. Toisea! Toises. Toler Tolsaace Mpiseass Moises Toises,
0 0.000 | 0.513 1.026 1.539 | 2.052 2.565 | 3.078 3.592 | 4.105 | 4.618
10 5.131 5.644 | 6.157| 6.670} 7-183 7.696 | 8.209] 8.722] 9.235] 9.748

20 10.261 | 10.775 | 11.288 | 11.801 | 12.314 | 12.827 | 13.340 | 13.853 | 14.366 | 14.879
30 15.392 | 15.905 | 16.418 | 16.931 | 17.445 | 17.958 | 18.471 | 18.984 | 19.497 | 20.010
40 20.523 | 21.036 | 21.549 | 22.062 | 22.575 | 23.088 | 23.601 | 24.114 | 24.628 | 25.141

50 25.654 | 26.167 | 26.680 | 27.193 | 27.706 | 28.219 | 28.732 | 29.245 | 29.758 | 30.271
60 30.784 | 31.298 | 31.811 | 32.324 | 32.837 | 33.350 | 33.863 | 34.376 | 34.889 | 35.402
70 35.915 | 36.428 | 36.941 | 37.454 | 37.967 | 38.481 | 38.994 | 39.507 | 40.020 | 40.533
80 41.046 | 41.559 | 42.072 | 42.585 | 43.098 | 43.611 | 44.124 | 44.637 | 45.151 | 45.664
90 || 46.177 | 46.690 | 47.203 | 47.716 | 48.229 | 48.742 | 49.255 | 49.768 | 50.281 | 50.794

E 16

VI. CONVERSION OF METRES INTO PARIS OR FRENCH FEET AND DECIMALS. 463

1 Metre = 3.078444 Paris Feet.

Metres. Units.

0. 1. 2. 3. 4. 3. 6. 7 8. 9.

Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet.
0.00 3.08 6.16 9.24] 12.31 15.39| 18.47} 21.55) 24.63) 27.71
30.78] 33.86; 36.94) 40.02} 43.10 46.18} 49.26) 52.33} 55.41|} 58.49
61.57| 64.65| 67.73} 70.80] 73.88 76.96; 80.04) 83.12] 86.20} 89.27
92.35) 95.43) 98.51) 101.59) 104.67] 107.75) 110.82) 113.90| 116.98] 120.06
123.14) 126.22) 129.29) 132.37) 1385.45} 138.53) 141.61] 144.69) 147.77) 150.84

153.92} 157.00| 160.08) 163.16} 166.24] 169.31] 172.39) 175.47| 178.55| 181.63
184.71| 187.79| 190.86) 193.94) 197.02] 200.10) 203.18| 206.26) 209.33) 212.41
215.49) 218.57| 221.65) 224.73) 227.80] 230.88] 233.96| 237.04] 240.12] 243.20
246.28) 249.35) 252.43) 255.51| 258.59] 261.67) 264.75) 267.82) 270.90] 273.98
277.06) 280.14} 283.22) 286.30) 289.37] 292.45) 295.53) 298.61) 301.69) 304.77

307.84| 310.92} 314.00/ 317.08] 320.16] 323.24; 326.32) 329.39) 332.47] 335.55
338.63) 341.71} 344.79] 347.86) 350.94] 354.02) 357.10| 360.18) 363.26] 366.33
369.41) 372.49) 375.57| 378.65) 381.73] 384.81) 387.88] 390.96) 394.04 397.12
400.20) 403.28) 406.35) 409.43) 412.51] 415.59) 418.67) 421.75) 424.83) 427.90
430.98) 434.06) 437.14) 440.22) 443.30] 446.37) 449.45) 452.53) 455.61| 458.69

150 461.77) 464.85) 467.92) 471.00) 474.08] 477.16) 480.24) 483.32) 486.39] 489.47
160 492.55) 495.63) 498.71| 501.79) 504.86] 507.94) 511.02) 514.10) 517.18] 520.26
170 523.34) 526.41) 529.49) 532.57) 535.65] 538.73) 541.81) 544.88) 547.96) 551.04
180 554.12) 557.20) 560.28) 563.36) 566.43] 569.51) 572.59) 575.67) 578.75| 581.83
190 584.90} 587.98) 591.06) 594.14) 597.22] 600.30| 603.38] 606.45) 609.53) 612.61

200 615.69) 618.77) 621.85) 624.92) 628.00] 631.08! 634.16) 637.24) 640.32) 643.39
210 6146.47| 649.55) 652.63; 655.71| 658.79] 661.87) 664.94) 668.02| 671.10} 674.18
220 677.26) 680.34| 683.41) 686.49) 689.57] 692.65) 695.73) 698.81| 701.89| 704.96
230 708.04) 711.12) 714.20) 717.28) 720.36] 723.43) 726.51) 729.59] 732.67) 735.75
240 738.83) 741.90| 744.98) 748.06| 751.14] 754.22| 757.30| 760.38] 763.45| 766.53

250 769.61) 772.69) 775.77| 778.85) 781.92] 785.00) 788.08} 791.16] 794.24] 797.32
260 800.40} 803.47) 806.55) 809.63) 812.71] 815.79) 818.87) 821.94) 825.02| 828.10
270 831.18] 834.26| 837.34) 840.42) 843.49] 846.57) 849.65) 852.73) 855.81| 858.89
280 861.96} 865.04) 868.12) 871.20) 874.28] 877.36) 880.43) 883.51) 886.59| 889.67

290 892.75] 895.83) 898.91) 901.98) 905.06] 908.14) 911.22) 914.30) 917.38) 920.45
300 923.53] 926.61) 929.69) 932.77) 935.85] 938.93) 942.00) 945.08) 948.16| 951.24
310 954.32) 957.40) 960.47; 963.55) 966.63] 969.71| 972.79 975.87) 978.95| 982.02
320 985.10) 988.18) 991.26) 994.34) 997.42] 1000.49 1003.57 1006.65) 1009.73 / 1012.81
330 1015.89) 1018.96 | 1022.04) 1025.12 1028.20 | 1031.28) 1034.36 1037.44|1040.51| 1043.59
340 1046.67 | 1049.75 | 1052.83) 1055.91 1058.98 | 1062.06 1065.14 1068.22| 1071.30) 1074.38
350 1077.46) 1080.53 | 1083.61 | 1086.69 1089.77 | 1092.85/ 1095.93 1099.00} 1102.08) 1105.16
360 1108.24/1111.32)1114.40| 1117.48 1120.55 | 1123.63 1126.71 1129.79) 1132.87| 1135.95
370 1139.02/ 1142.10) 1145.18) 1148.26 1151.34] 1154.42 1157.49 1160.57/ 1163.65 | 1166.73
380 1169.81 | 1172.89 1175.97 1179.04 1182.12 1185.20 1188.28 1191.36|1194.44|1197.51
390 1200.59) 1203.67 | 1206.75) 1209.83) 1212.91 1215.99 1219.06 1222.14) 1225.22|1228,30);
| = z ‘
O jr 1. jo 2 js 8 [ea ah 6. | 7 | 8 | 9

el

464

400
410
420
430
440

450
460
470
480
490

500
510
520
530
540

550
560
570
580
590

600
610
620
630
640

650
660
670
680
690

700
710
720
730
740

750
760
770
780
790

CONVERSION

1 Metre = 3.078444 Paris Feet.

Metres.

0.

Fr. Feet.

1231.38
1262.16
1292.95
1323.73
1354.52

1385.30
1416.08
1446.87
1477.65
1508.44

1539.22
1570.01
1660.79
1631.58
1662.36

1693.14
1723.93
1754.71
1785.50
1816.28

1847.07
1877.85
1908.64
1939.42
1970.20

2000.99
2031.77
2062.56
2093.34
2124.13

2154.91
2185.70
2216.48
2247.26
2278.05

2308.83
2339.62
2370.40
2401.19
2431.97

0.

1.

Fr. Feet.
1234.46
1265.24
1296.02
1326.81
1357.59

1388.58
1419.16
1449.95
1480.73
1511.52

1542.30
1573.08
1603.87
1634.65
1665.44

1696.22
1727.01
1757.79
1788.58
1819.36

1850.14
1880.93
1911.71
1942.50
1973.28

2004.07
2034.85
2065.64
2096.42

2. Be 4.

Fr. Feet. | Fr. Feet.
1237.53/ 1240.61
1268.32) 1271.40
1299.10 1302.18
1329.89 1332.97
1360.67 | 1363.75

Fr. Feet.
1245.69
1274.48

1391.46
1422.24
1453.03
1453.81
1514.59

1394.54
1425.32
1456.10
1456.89
(1517.67

1397.61
1428.40

1545.38
1576.16
1606.95
1637.73
1668.52

1548.46
(1579.24
1610.03
(1640.81
1671.60

1582.32

1674.67

1702.38
1733.16
1763.95
1794.73
(1825.52

1699.30
1730.09
1760.87
1791.65
1822.44

1767.03

1856.30
1887.09
(1917.87
1948.66
1979.44

1853.22
1884.01
1914.79
1945.58
1976.36

1920.95

2007.15 2010.22
2037.93 2041.01
2068.71 2071.79
2099.50 2102.58

2013.30

2105.66

1305.26.
1336.04 |
1366.83 |

1 1400.69
1459.18 |
1489.97 |
1520.75 |
1551.54 |
1613.10]
1643.89 |
1705.46 |

1736.24]

1797.81]
1828.60}

1859.38 |
1890.16 |

1951.73]
1982.52 |

| 2016.38 2019.46.
2044.09 |
2074.87 |

Units

¥r. Feet.
1246.77
1277.55
1308.34
1339.12
1369.91

Fr. Feet.
1249.85
1280.63
1311.42
1342.20)
1372.99

1403.77
1434.55
1465.34
1496.12
1526.91

1431.48
1462.26
1493.05
1523.83

1554.61
1585.40)
1616.18)
1646.97
1677.75

1557.69
1588.48 |
1619.26
1650.05
1680.83

1708.54
1739.32
1770.11
1800.89 |
1831.67

1711.61
1742.40
1773.18
1803.97)
1834.75

1862.46 1865.54
1893.24 | 1896.32
1924.03 1927.11
1954.81 1957.89

|

al tuoi

2047.17 2050.24

2077.95 2081.03

2108.73 2111.81

7

Fr. Feet.
1252.93
1283.71
1314.50
1345.28
1376.06

| Fr Feet.
1256.01
1286.79
1317.57
1348.36
1379.14

1406.85
1437.63
1468.42
1499.20
1529.99

(1409.93
1440.71
1471.50
(1502.28
1533.07

1560.77 1563.85
1591.56 | 1594.63
1622.34 | 1625.42
1653.12 1656.20
1683.91 | 1686.99

1714.69 |1717.77
1745.48 |1748.56
1776.26/1779.34
1807.05 1810.13
1837.83 1840.91

1868.62 1871.69
1899.40 1902.48
1930.18 1933.26
1960.97 1964.05

1991.75 1994.83

2022.54 2025.62
2053.32 2056.40
2084.11 2087.19
2114.89 2117.97

2127.20/2130.28
2157.99}
2188.77
2219.56
2250.34
2281.13

2161.07
2191.85
2222.64
2253.42
2284.21

2311.91
2342.70
2373.48
2404.26
2435.05

2314.99
2345.77
2376.56
2407.34
2438.13

1. 2.

2133.36 |2136.44

2164.15|2167.22

2256.50 2259.58
2287.28) 2290.36

2348.85 2351.93
2379.64 2382.72
2410.42 2413.50

2441.21| 2444.28

3.

4.

18

2194.93 2198.01 |
2225.72 | 2228.79 |

2318.07 2321.15 |

2139.52 2142.60 2145.68

2170.30 2173.38 2176.46
2201.09 2204.17 2207.24
2231.87 2234.95 2238.03
2262.66 2265.73 2268.81
2293.44 2296.52 2299.60

2324.23 2327.30 2330.38
2355.01 2358.09. 2361.17
2385.79 2388.87 2391.95
2416.58 2419.66 2422.74
2417.36 2450.44 2453.52

5: |© ey 8

(2148.75

2179.54
2210.32
2241.11
2271.89
2302.68

2333.46
2364.24
2395.03
2425.81

2456.60

8.

OF METRES INTO PARIS OR FRENCH FEET AND DECIMALS.

Fr. Feet.
1259.08
1289.87
1320.65
1351.44
1382.22

1413.01
1443.79!
1474.57
1505.36

1536.14|

1566.93
1597.71
1628.50
1659.28
1690.07
|

1720.85
1751.63
1782.42}
1813.20
1843.99

1874.77|
1905.56)
1936.34
1967.13
1997.91

2028.69
2059.48
2090.26
2121.05
2151.83

2182.62
2213.40
2244.19]
2274.97
2305.75

2336.54
2367.32
2398.11
2428.89
2459.68

9.

CONVERSION OF METRES INTO PARIS OR

FRENCH FEET AND DECIMALS.

1 Metre = 3.078444 Paris Feet.

OOo“ hOOOonnaoawj»s——«»4>—\—"»—_—ams))]

465

Metres. Units.
Metres. |
Tens.
0. 1. 2. Be 4. 3. 6. ZW &§. 9.
Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. | Fr. Feet. Fr. Feet. | Fr Feet. Fr. Feet. {I
800 2462.76|2465.83)| 2468.91! 2471.99] 2475.07 | 2478.15} 2481.23 | 2484.30) 2487.38 2190.46)
810 2493.54| 2496.62] 2499.70) 2502.77) 2505.85 | 2508.93 | 2512.01 2515.09 2518.17 2521.25
820 2524.32) 2527.40) 2530.48) 2533.56 | 2536.64 | 2539.72) 2542.79 | 2545.87 2548.95 2552.03)
830 2555.11) 2558.19 2561.27) 2564.34 | 2567.42 | 2570.50) 2573.58 | 2576.66) 2579. 74 2582.81
840 2585.89 | 2588.97 | 2592.05! 2595.13] 2598.21 | 2601.29| 2604.36 | 2607.44 | 2610. 52. 2613.60
850 2616.68 | 2619.76 2622.83 2625.91 | 2628.99 | 2632.07 | 2635.15 | 2638.23 2641.30 2644.38
860 2647.46 | 2650.54) 2653.62 2656.70) 2659.78 | 2662.85] 2665.93 | 2669.01 2672.09 2675.17
870 2678.25|2681.32/ 2684.40) 2687.48 | 2690.56 | 2693.64/| 2696.72 |2699.80| 2702.87 2705.95
880 2709.03|2712.11/2715.19|2718.27| 2721.34 | 2724.42] 2727.50) 2730.58 2733.66 2736.74
890 2739.82| 2742.89) 2745.97 | 2749.05| 2752.13 | 2755.21) 2758.29 | 2761.36 2764.44| 2767.52
900 2770.60 2773.68 | 2776.76 2779.83| 2782.91 | 2785.99) 2789.07 | 2792.15) 2795.23) 2798.31
910 2801.38 2804.46 2807.54 2810.62| 2813.70] 2816.78) 2819.85 | 2822.93) 2826. 01, 2829.09
920 2832.17 2835.75 2838.33 2841.40| 2844.48 | 2847.56/ 2850.64 2853.72! 2856. 80 2859.87]!
930 2862.95} 2866.03 2869.11) 2872.19] 2875.27 | 2878.35) 2881.42 2884.50 2887.58) 2890.66);
940 2893.74 2896.82 2899.89 2902.97|2906.05 | 2909.13) 2912.21| 2915.29 2918.36 2921. 44)
950 2924.52| 2927.60) 2930.68) 2933.76 | 2936.84] 2939.91 | 2942.99 | 2946.07 | 2919. a; 2952.23
960 2955.31| 2958.38 | 2961.46 2964.54| 2967.62 | 2970.70) 2973.73 | 2976.86 | 2979. 93, 2983.01
970 2986.09 | 2989.17| 2992.25 2995.33)|2998.40] 3001.48 3004.56 | 3007.64|3010. 72/3 3013.80 |
} 980 3016.88 / 3019.95 3023.03 3026.11 3029.19 | 3032.27)| 3035.35, 3038. 42/3041. 50 3044.58]]
990 3047.66 |3050.74 3053.82 3056.89 3059.97 3063.05| 3066.13 |3069.21 13072 .29 3075.37)|
Metres. French Feet Metres. | French Feet Metres. | French Feet tet | Mt Metres. French Feet.
1000 3078.44 5000 15392.22 9000 27706.00 13000 40019.78
2000 6156.89 6000 18470.67 10000 30784.44 14000 43098 .22
3000 9235.33 7000 21549.11 11000 33862.89 15000 46176.67 |
4000 12313.78 8000 24627.56 12000 36941.33 16000 49255.11
Decimetres.
Metres,
0. 1. 2. 3. 4. De 6. ZV s. 9.
Fr Feet. | Fr Feet. | Fr.Feet. | Fr.Feet. | Fr Feet. | Fr Feet | Fr Feet. | Fr. Feet. | Fr.Feet. | Fr Feet.
0 0.0000! 0.3078| 0.6157) 0.9235) 1.2314] 1.5392] 1.8471] 2.1549] 2.4628] 2.7706)!
1 3.0784] 3.3863] 3.6941) 4.0020) 4.3098] 4.6177] 4.9255) 5.2334) 5.5412] 5.8490)!
2 6.1569| 6.4647| 6.7726| 7.0804! 7.3883] 7.6961] 8.0040) 8.3118] 8.6196) 8.9275
3 9.2353) 9.5432) 9.8510) 10.1589) 10.4667 | 10.7746) 11.0824) 11.3902| 11.6981 |12.0059 |
4 12.3138 | 12.6216 | 12.9295] 13.2373) 13.5452 | 13.8530| 14.1608) 14.4687 | 14.7765) 15.0844 |
|
5 15.3922/15.7001 | 16.0079) 16.3158) 16.6236 | 16.9314) 17.2393) 17.5471 | 17.8550| 18.1628 |
6 18.4707) 18.7785 | 19.0864) 19.3942)| 19.7020 | 20.0099 | 20.3177) 20.6256 | 20.9334 |21.2413 |
7 21.5491| 21.8570 | 22.1648 | 22.4726 22.7805 | 23.0883 | 23.3962) 23.7010 | 24.0119 /24.5197 |
8 24.6276 24.9354) 25.2432 25.5511| 25.8589 | 26.1668 | 26.4746 | 26.7825 | 27.0903 |27.3982),
9 27.7060 28.0138 28.3217) 28.6295 28.9374 | 29.2452 29.5531 29.8609 |30.1688 30.4766 |

19

Metres.

10
20
30
40

60
70
80
90

100
110
120
130
140

bo po pw bv
a on
oor

ma
oO

290

300
310
320
330
340

350
360
370
380
390

E

VII.

CONVERSION OF

1 Metre = 3.28089917 English Feet.

METRES INTO ENGLISH FEET AND DECIMALS.

Metres.

(Units.)

0.

i.

2.

Eng.Feet. | Eng. Feet. |Eng.Feet.

0.0
32.81
65.62
98.43

131.24

164.04
196.85
9.66

wa om
GS Ot te Ww

~l

984.27
1017.08
1049.89
1082.70
1115.51

1148.31
1181.12
1213.93
1246.74
1279.55

0.

3.28
36.09
68.90

101.71
134.52

167.33
200.13
232.94
265.75
298.56

331.37
364.18
396.99
429.80
462.61

495.42
528.22
561.03
593.84
626.65

659.46
692.27
725.08
757.89

| 790.70

987.55
1020.36
1053.17
1085.98
1118.79

1151.60
1184.40
1217.21
1250.02

1.

1282.83

6.56
39.37
72.18

104.99
137.80

170.61
203.42
236.22
269.03
301.84

334.65
367-46
400.27
433.08
465.89

498.70
531.51
564.31
597.12
629.93

990.83
1023.64
1056.45
1089.26
1122.07

1154.88
1187.69
1220.49
1253.30

1286.11

2.

Eng. Feet. | Eng. Feet.
9.84 13.12
42.65 45.93
75.46 78.74
108.27) 111.55
141.08) 144.36

173.89
206.70
239.51
272.31
305.12

177.17
209.98
242.79
275.60
308.40

337.93
370.74
403.55
436.36
469.17

341.2]
374.02
406.83
439.64
472.45

501.98
534.79
567.60
600.40
633.21

505.26
538.07
570.88
603.69
636.49

666.02
698.83
731.64
764.45
797.26

669.30
702.11
734.92
767.75
800.54

830.07
862.88
895.69
928.49
961.30

833.35
866.16
898.97
931.78
964.58

994.11
1026.92
1059.73
1092.54
1125.35

997.39
1030.20
1063.01
1095.82
1128.63

1158.16
1190.97
1223.78
1256.58
1289.39

1161.44
1194.25

1259.87
1292.67

Be 4.

5.

Eng. Feet.
16.40
49.21
82.02

114.83
147.64

180.45
213.26
246.07
278.88
311.69

344.49
377.30
410.11
442.92
475.73

508.54
541.35
574.16
606.97
639.75

672.58
705.39
738.20
771.01
803.82

836.63
869.44
902.25
935.06
967.87

1000.67
1033.48
1066.29
1099.10
1131.91

1164.72
1197.53

1227.06]1230.34

1263.15
1295.96

5.

6.

Eng Feet.
19.69
52.49
85.30

118.11
150.92

183.73
216.54
249.35
282.16
314.97

347.78
380.58
413.39
446.20
479.01

511.82
544.63
577.44
610.25
643.06

675.87
708.67
741.48
774.29
807.10

839.91
872.72
905.53
938.34
971.15

1003.96
1036.76
1069.57
1102.38
1135.19

1168.00
1200.81
1233.62
1266.43
1299.24

6.

20

Ze

22.97
55.78
88.58
121.39
154.20

187.01
219.82
252.63
285.44
318.25

351.06
385.87

416.67
449.48
482.29

515.10
547.91
580.72
613.53
646.34

679.15
711.96
744.76
T7757
810.38

843.19
876.00
908.81
941.62
974.45

1007.24
1040.05
1072.85
1105.66
1138.47

1171.28
1204.09
1236.90
1269.71
1302.52

Ze

Eng.Feet.

ene

8. 9.

Eng.Feet.
26.25
59.06
91.87

124.67
157.48

Eng. Feet.
29.53
62.34
95.15)

127.96
160.76

190.29
223.10
255.91
288.72
321.53

193.57
226.38
259.19
292.00
324.81

354.34
387.15
419.96
452.78
485.57

357.62
390.43
423.24
456.04
488.85

518.38} 521.66

551.19
584.00
616.81
649.62

554.47
587.28
620.09 |
652.90

682.43] 685.71

718.52
751.33
784.13
816.94

715.24
748.05
780.85
$13.66

849.75
882.56
915.37
948.18
980.99

846.47
879.28
912.09
944.90
977.71

1013.80
1046.61
1079.42
1112.22
1145.03

1010.52
1043.33
1076.13
1108.94
1141.75

1177.84
1210.65
1245.46
1276.27
1309.08

1174.56
1207.57
1240.18
1272.99
1305.80

CONVERSION OF METRES INTO ENGLISH FEET AND DECIMALS. 467

4090 to 799.

Metres. (Units.)

5. 6. Ve 8. 9.

0. 1. | 2. a. 4.

Eng.Feet. | Eng. Feet. | Eng. Feet. | Eng. Feet. | Eng. Feet.
400 1312.36 | 1315.64 | 1318.92 | 1322.20 |1325.48
410 1345.17 | 1348.45 | 1851.73 | 1355.01 | 1358.29
420 1377.98 | 1381.26 | 1884.54 | 1387.82 |1391.10
430 1410.79 | 1414.07 | 1417.35 | 1420.63 |1423.91
440 1443.60 | 1446.88 | 1450.16 | 1453.44 | 1456.72

Eng.Feet. | Eng. Feet. | Eng. Feet. | Eng. Feet. | Eng. Feet.
1328.76 | 1332.05 | 1335.33 | 1338.61 | 1341.89
1361.57 | 1364.85 | 1368.13 | 1371.42 | 1374.70
1394.35 1397.66 | 1400.94 1404.22 /1407.51
1427.19 | 1430.47 | 1433.75 | 1437.03 | 1440.31
1460.00 | 1463.28 | 1466.56 | 1469.84 | 1473.12

1492.81 | 1496.09 | 1499.37 | 1502.65 | 1505.93
1525.62 | 1528.90 | 1532.18 | 1535.46 | 1538.74
1558.43 | 1561.71 | 1564.99 | 1568.27 | 1571.55
1591.23 | 1594.52 | 1597.80 | 1601.08 | 1604.36
1624.05 | 1627.33 | 1650.61 | 1633.89 | 1637.17

450 1476.40 | 1479.69 | 1482.97 | 1486.25 | 1489.53
460 1509 21 1512.49 | 1515.78 1519.06 | 1522.34
470 1542.02 | 1545.30 | 1548.58 | 1551.87 | 1555.15
480 1574.83 | 1578.11 | 1581.39 | 1584.67 | 1587.96
490 1607.64| 1610.92 | 1614.20! 1617.48 | 1620.76

1656.85 | 1660.13 | 1663.42 | 1666.79 | 1669.98
1689.66 | 1692.94 | 1696.22 | 1699.51 | 1702.79
1722.47 | 1725.75 | 1729.03 | 1732.31 | 1735.60
1755.28 |1758.56 | 1761.84 | 1765.12 | 1768.40
1788.09 | 1791.37 | 1794.65 | 1797.93 | 1801.21

500 1640.45 | 1643.73 | 1647.01 | 1650.29 | 1653.57
510 1673.26 | 1676.54 | 1679.82 | 1653.10 | 1686.38
520 1706.07 | 1709.35 | 1712.63 | 1715.91 |1719.19
530 1738.88 | 1742.16 | 1745.44 | 1748.72 | 1752.00
540 1771.69 | 1774.97 | 1778.25 | 1781.53 |1784.81

550 1804.49 | 1807.78 | 1811.06 | 1814.34 | 1817.62
560 1837.30 | 1840.58 | 1843.87 | 1847.15 | 1850.43
570 1870.11 | 1873.39 | 1876.67 | 1879.96 | 1853.24
580 1902.92 |1906 20 | 1909.48 | 1912.76 |1916.05
590 1935.73 | 1939.01 | 1942.29 | 1945.57 | 1948.85

1820.90 | 1824.18 | 1827.46 | 1830.74 | 1834.02 |)
1853.71 | 1856.99 | 1860.27 | 1863.55 | 1866.83 |)
1886.52 | 1889.80 | 1893.08 | 1896.36 | 1899.64
1919.33 | 1922.61 | 1925.89 | 1929.17 | 1932.45
1952.13 | 1955.42 | 1958.70 | 1961.98 | 1965.26

600 1968.54 |1971.82 | 1975.10 | 1978.38 |1981.66]1984.94 | 1988.22 | 1991.51 | 1994.79 | 1998.07
610 || 2001.35 | 2004.63 | 2007.91 | 2011.19 |2014.47|2017.75 | 2021.03 | 2024.31 | 2027.60 | 2030.88
620 || 2034.16 | 2037.44 | 2040.72 | 2044.00 |2047.28]2050.56 | 2053.84 | 2057.12 | 2060.40 | 2063.69
630 || 2066.97 | 2070.25 | 2073.53 | 2076.81 | 2080.09] 2083.37 |2086.65| 2089.93 | 2093.21 | 2096.49
640 || 2099.78 | 2103.06 | 2106.34 | 2109.62 |2112.90 Sn eyes 2122.74 |2126.02 | 2129.30

650 || 2132.58 |2135.87 | 2139.15 | 2142.43 |2145.71|2148.99 | 2152.27 | 2155.55 | 2153.83 | 2162.11
660 2165.39 |2168.67 | 2171.96 | 2175.24 |2178.52]2181.80 | 2185.08 | 2188.36 | 2191.64 | 2194.92
670 || 2198.20 ]2201.48 | 2204.76 | 2208.05 |2211.33]2214.61 | 2217.89 | 2221.17 | 2224.45 | 2227.73
680 || 2231.01 |2234.29 | 2237.57 | 2240.85 |2244.13]2247.42 | 2250.70 | 2253.98 | 2257.26 | 2260.54
690 || 2263.82 |2267.10 | 2270.38 | 2273.66 |2276.94]2280.22 |2283.51 | 2286.79 |2290.07 | 2298.35

|

! 700 || 2296.63 |2299.91 | 2303.19 | 2306.47 | 2309.75|2313.03 |2316.31 | 2319.60 |2322.88 | 2326.16
| 710 || 2329.44 |2332.72 | 2336.00 | 2339.28 |2342.56]2345.84 | 2349.12 | 2352.40 | 2355.69 | 2358.97
|

720 2362.25 | 2365.53 | 2368.81 | 2372.09 |2375.3712378.65 2381.93 | 2385.21 |2388.49 | 2391.78
730 2395.06 | 2398.34 | 2401.62 |2104.90 |2408.18}2411.46 |2414.74 | 2418.02 | 2421.39 | 2424.58
740 || 2427.87 |2431.15 | 2434.43 |2437.71 |2440.99] 2444.27 | 2447.55 | 2450.83 |2454.11 [2457.39

750 || 2460.67 | 2463.96 | 2467.24 |24170.52 |2473.80]2477.08 | 2480.36 | 2483.64 |2486.92 |2
| 760 || 2493.48 | 2496.76 | 2500.05 | 2503.33 |2506.61]2509.89 | 2513.17 | 2516.45 |2519.73 2528.01]
| 770 || 2526.29 |2529.57 | 2532.85 |2536.14 |2539.42]2542.70 |2545.98 | 2549.26 |2552.54 | 25
| 780 || 2559.10 |2562.38 | 2565.66 | 2568.94 |2572.22)2575.51 |2578.79 | 2582.07 |2585.35 | 2
| 790 | 2591.91 }2595.19 | 2598.47 | 2601.75 |2605.03]2608.31 | 2611.60 | 2614.88 |2618.16 | 2621.44

0. 1 e 2. de 4. De 6. 7% &. 9.

fel. zi

468

=

CONVERSION

OF METRES INTO ENGLISH FEET AND DECIMALS.

800

to 1199.

Metres. (Units.)

Metres. | == |
0. 1. 2. 3. 4. 3d. 6. Ze 8. 9. |
Eng.Feet. | Eng.Feet. | Eng.F cet. | Eng.Feet. | Eng.Feet.| Eng.Feet. | Eng. Feet. | Eng.Feet.} Eng.Feet. | Eng. Feet. |
800 2624.72 | 2628.00 | 2631.28 | 2634.56 | 2637.84] 2641.12 | 2644.40 | 2647.69 | 2650.97 | 2654.25
810 2657.53 | 2660.81 | 2664.09 | 2667.37 | 2670.65] 2673.93 | 2677.21 | 2680.49 | 2683.78 | 2657.06
820 2690.34 | 2693.62 | 2696.90 | 2700.18 | 2703.46] 2706.74 | 2710.02 | 2713.30 | 2716.58 | 2719.87 |:
830 2723.15 | 2726.43 | 2729.7] | 2732.99 | 2736.27] 2739.55 | 2742.83 | 2746.11 | 2749.39 | 2752.67
840 2755.96 | 2759.24 | 2762.52 | 2765.80 | 2769.08 | 2772.36 | 2775.64 | 2778.92 | 2782.20 | 2785.48
850 2788.76 | 2792.05 | 2795.33 | 2798.61 | 2801.89|2805.17 | 2808.45 | 2811.73 | 2815.01 | 2818.29
860 2821.57 | 2824.85 | 2828.14 | 2831.42 | 2834.70/2837.98 | 2841.26 | 2844.54 | 2847.82 | 2851.10
870 2854.38 | 2857.66 | 2860.94 | 2864.22 | 2867.5 1|2870.79 | 2874.07 | 2877.55 | 2880.63 | 2883.91
880 2887.19 | 2890.47 | 2893.75 | 2897.03 | 2900.31 ]2903.60 | 2906.88 | 2910.16 | 2913.44 | 2916.72
890 2920.00 | 2923.28 | 2926.56 | 2929.84 | 2933.12]2936.40| 2939.69 | 2942.97 | 2946.25 | 2949.53 |!
900 2952.81 | 2956.09 | 2959.37 | 2962.65 | 2965.93 |2969.21 | 2972.49 | 2975.78 | 2979.06 | 2982.34
910 2985.62 | 2988.90 | 2992.18 | 2995.46 | 2998.74 13002.02 | 3005.30 | 3008.58 | 3011.87 | 3015.15
920 3018.43 | 3021.71 | 3024.99 | 3028.27 | 3031.55 /3034.83 | 3038.11 | 3041.39 | 3044.67 | 3047.96 ||
930 3051.24 | 3054.52 | 3057.80 | 3061.08 | 3064.36 |3067.64 | 3070.92 | 3074.20 | 3077.43 | 3080.76 ||
940 || 3084.05 |3087.33 | 3090.61 | 3093.89 | 3097.17]3100.45 | 3103.73 |3107.01 3110.29 | 3113.57
950 3116.85 | 3120.14 | 3123.42 | 3126.70 | 3129.98 |3133.26 3136.54 | 3139.82 3143.10 | 3146.38
960 3149.66 | 3152.94 | 3156.22 |3159.51 | 3162.79]3166.07 | 3169.35 | 3172.63 | 3175.91 | 3179.19
970 3182.47 | 3185.75 | 3189.03 | 3192.31 | 3195.60/3198.88 | 3202.16 | 3205.44 | 3208.72 | 3212.00 |;
980 3215.28 |3218.56 | 3221.84 /3225.12 | 3228.40]3231.69 | 3234.97 | 3238.25 | 3241.53 | 3244.81
990 3248.09 | 3251.37 | 3254.65 |3257.93 | 3261.21 [3264.49 | 3267.78 | 3271.06 | 3274.34 | 3277.62 |;
1000 3280.90 | 3284.18 | 3287.46 |3290.74 | 3294.02 13297.30 | 3300.58 | 3303.87 | 3307.15 | 3310.48
1010 ||3313.71 |3316.99 | 3320.27 |3323.55 | 3326.83 [3330.11 | 3333.39 |3336.67 | 3339.96 | 3343.24 |!
1020 3346.52 | 3349.80 | 3353.08 | 3356.36 | 3359.64 |3362.92 | 3366.20 | 3369.48 | 3372.76 | 3376.05 |
| 1030 |/3379.33 | 3382.61 | 3385.89 | 3389.17 | 3392.45 13395.73 | 3399.01 | 3402.29 | 3405.57 | 3408.85
1040 3412.14 |3415.42 |3418.70 /}3421.98 | 3425.26 [3428.54 | 3431.82 | 3435.10 /3438.38 | 3441.66
1050 3444.94 | 3448.22 | 3451.51 | 3454.79 | 3458.07 |3461.35 | 3464.63 | 3167.91 | 3471.19 | 3474.47
1060 = || 3477.75 3481.03 | 3484.31] | 3487.60 | 3490.88 |3494.16 | 3497.44 |3500.72 | 3504.00 | 3507.28
1070 |'3510.56 |3513.84/|3517.12|3520.40| 3523.69|3526.97 | 3530.25 | 3533.53 | 3536.81 | 3540.09
1080 3543.37 | 3546.65 | 3549.93 |3558.21 | 3556.49 ]3559.78 | 3563.06 | 3566.34 | 3569.62 3572.90 |
1090 3576.18 | 3579.46 | 3582.74 | 3586.02 | 3589.3013592.58 | 3595.87 | 3599.15 | 3602.43 | 3605.71 |
1100 3608.99 | 3612.27 | 3615.55 |3618.83 | 3622 3625.39! 3628.67 |3631.96 | 3635.24 | 3638.52 |
1110 3641.80 | 3645.08 | 3648.36 |3651.64 | 3654.92 )3658.20 3661.48 | 8664.76 | 3668.05 | 3671.33 |)
1120 3674.61 | 3677.89 | 3681.17 |3684.45 | 3687.73 3691.01 3694.29 3697.57 3700.85 | 3704.14 ||
1130 3707.42 |3710.70 |3713.98 |3717.26 | 3720.54|3723.82 | 3727.10 | 3730.38 |3733.66 | 3736.94 ||
1140 3740.22 |3743.51 | 3746.79 |3750.07 |3753.3513756.63 | 3759.91 | 3763.19 | 3766.47 | 3769.75 |!
1150 3773.03 |3776 31 |3779.60 |3782.88 |3786.16]3789.44 | 3792.72 | 3796.00 |3799.28 One|
1160 = |/5805.84 | 3809.12 |3812.40 |3815.69 | 3818.97 |3822.25 | 3825.53 | 3828.81 |3832.09 | 3835.37 |
1170 = |'8838.65 | 3841.93 |3845.21|3848.49 |3851.7813855.06 | 3858.34 | 3861.62 | 3864.90 | 3868.18 |
1180 3871.46 | 3874.74 |3878.02 |3881.30 | 3884.58 13887.87 | 3891.15 | 3894.43 |3897.71 | 3900.99 ||
1190 3904.27 | 3907.55 | 3910.83 |3914.11 |3917.3913920.67 | 3923.96 | 3927.24 | 3930.52 | 3933.80 |
0. I. 2. Be 4. dD. 6 | 7% 8. 9.
E ae

CONVERSION OF METRES INTO ENGLISH FEET AND DECIMALS.

Metres.

0.
| Eng.Feet.
| 200 |/3937.08
| 210 |/3969.89

220 || 4002.70
| 1230 || 4035.51
1240 ||4068.31
1250 || 4101.12
1260 .| 4133.93
| 1270 || 4166.74
1280 || 4199.55
1290 || 4232.36
1300 || 4265.17
1310 || 4297.98
1320 || 4330.79
1330 ||4363.60
1340 | 4396.40
1350 || 4429.21
1360 || 4462.02
1370 || 4194.83
1380 || 4527.64
1390 11 4560.45
1400 || 4593.26
1410 || 4626.07
i| 1420 |) 4658.88
i] 1430 || 4691.69
} 1440 |/4724.49
1450 || 4757.30
1460 ||4790.11
1470 || 4822.92
1480 || 4855.73
1490 || 4888.54
1500 | 4921.35
1510 || 4954.16
1520 || 4986.7
1530 ||5019.78
1540 || 5052.58
| 1550 ||5085.39
1560 |/5118.20
; 1570 |/5151.01
1580 ||5183.82
| 1590 ||5216.63
a 0.

Beil

Eng.Feet.
3940.36
3973.17
4005.98
4038.79
4071.60

2.

3943.64
3976.45
4009.26
4042.07
4074.88

4104.40
4137.21
4170.02
4202.83
4235.64

4140.49
4173.30
4206.11
4238.92

4268.45
4301.26
4334.07
4366.88
4399.69

4271.73
4304.54
4337.35
4370.16
4402.97

4432.49 | 4435.78
4465.30 | 4468.58
4498.11 | 4501.39
4530.92 | 4534.20
4563.73 | 4567.01

4596.54
4629.35
4662.16
4694.97
4727.78

4599.82
4632.63
4665.44
4698.25
4731.06

4760.58
4793.39
4826.20
4859.01
4891.82

4763.87
4796.67
4829.48
4862.29
4895.10

4924.63
4957.44
4990.25
5023.06
5055.87

4927.91
4960.72
4993.53
5026.34
5059.15
5088.67 | 5091.96
5124.76
5157.57
5190.38
5223.19

Eng. Feet.

4107.69)

1200 to 1599.

3.

Eng.Feet.
3946.92
3979.73
4012.54
4045.35
4078.16

4110.97
4143.78
4176.58
4209.39
4242.20

4275.01
4307.82
4340.63
4373.44
4406.25

4439.06
4471.87
4504.67
4537.48
4570.29

4603.10
4635.91
4668.72
4701.53
4734.34

4767.15
4799.96
4832.76
4865.57
4898.38

4931.19
4964.00
4996.81
5029.62
5062.43

5095.24
5128.05
5160.85
5193.66
5226.47

3950. 20]3953.48
3983.01]3986.29
4015.82]4019.10
4048.63]4051.91
4081.44]4084.72

4$114.25]4117.53
4147.06)4150.34
4179.87]4183.15
4212.67]4215.96
4245.48]4248.76

4278.29} 4281.57
4311.10}4314.35
4343.91]4317.19
4376.72|4380.00
4409.53}4412.81

4442.34]4445.62
4475.15}4478.43
4507.96}4511.24
4540.76]4544.05
4573.57|4576.85

4606.38}]4609.66
4639.19)}4642.47
4672.00]4675.28
4704.81]4708.09
4737.62|4740.90

4770.43
4803.24
4836.05
4868.85
4901.66

4773.71
4806.52
4839.33
4872.14
4904.94

4934.47
4967.28
5000.09
5032.90
5065.71

4937.75
4970.56
5003.37
5036.18
5068.99

5098.62
5131.33
5164.14
5196.94
5229.75

5101.8
5134.61
5167.42
5200.23

Eng.Feet.] Eng. Feet.

5233.03

6.

Eng.Feet.
3956.76
3989.57
4022.38
4055.19
4088.00

4120.81
4153.62
4186.43
4219.24

7

3960.05
3992.85
4025.66
4058.47
4091.28

4124.09
4156.90
4189.71
4222.52

4252.05

4284.85
4317.66
4350.47
4383.28
4416.09

4448.90
4481.71
4514.52
4547.33
4580.14

4612.94
4645.75
4678.56
4711.37
4744.18

4776.99
4809.80
4842.61
4875.42
4908.23

4941.03
4973.84
5006.65
5039.46
5072.27

5105.08
5137.89
5170.70
5203.51
5236.32

6.

4255.33

4288.14
4320.94
4353.75
4386.56
4419.37

4452.18
4484.99
4517.80
4550.61
4583.42

4616.23
4649.03
4681.84
4714.65
4747.46

4780.27
4813.08
4845.89
4878.70
4911.51

4944.31
4977.12
5009.93
5042.74
5075.55

5108.36
5141.17
5173.98
5206.79

Ze

Eng. Feet.

s.

Eng.Feet.
3963.33
3996.14
4028.94
4061.75
4094.56

4127.37
4160.18
4192.99
4225.80
4258.61

4291.42
4324.23
4357.03
4389.84

469

Metres. (Units.) |

9.
=i}
Eng.Feet. |
3966.62 ,'
3999.42
4032.23
4065.03
4097.84

4130.65
4163.46 ||
4196.27
4229.08
4261.89

4294.70
4327.51
4360.31
4393.12

4422.65

4455.46
4488.27
4521.08
4553.89
4586.70

4619.51
4652.31
4685.12
4717.93

5239.60

4750.74

4783.55
4816.36
4849.17
4881.98
4914.79

4917.60
4980.40
5013.21
5046.02
5078.83

5111.64
5144.45
5177.26
5210.07
5242.88

8.

4425.93

4458.74
4491.55
4524.36
4557.17
4589.98

4622.79
4655.60
4688.40
4721.21
4754.02

4786.83
4819.64
4852.45
4885.26
4918.07

4950.88
4983.69
5016.49
5049.30
5082.11

5114.92 |
5147.73
5180.54
5213.35
5246.16

9.

470

CONVERSION

OF METRES INTO ENGLISH FEET AND DECIMALS.

1600

to 2000.

Metres. (Units.)

Metres.
O: | ede Wiese) os. t] Acai etl) 6: a | 8. | 9. |
Eng. Feet. | Eng. Feet. | Eng. Fcet. | Eng. Feet. | Eng. Feet.] Eng.Feet. | Eng.Feet. | Eng. Feet. | Eng.Feet. | Eng. Feet. |!
1600 ||5249.44| 5252.72 |5256.00 | 5259.28 | 5262.56]5265.84 | 5269.12 | 5272.40 | 5275.69 | 5278.97 ||
1610 || 5282.25 |5285.53 | 5288.81 |5292.09 |5295.37|5298.65 | 5301.93 | 5305.21 |5308.49 | 5311.78
1620 {5315.06 |5318.34 |5321.62 |5324.90 |5328.18]5331.46 | 5334.74 | 5338.02 | 5341.30 | 5344.58
1630 || 5347.87 |5351.15 | 5354.43 |5357.71 | 5360.9915364.27 | 5367.55 | 5370.85 | 5374.11 | 5377.39
1640 || 5380.67 | 5383.96 | 5387.24 |5390.52 | 5393.80]5397.08 | 5400.36 | 5403.64 | 5406.92 | 5410.20
1650 ||5413.48 | 5416.76 | 5420.05 | 5423.33 | 5426.6115429.89 | 5433.17 | 5436.45 | 5439.73 | 5443.01
1660 ||5446.29 | 5449.57 | 5452.85 | 5456.14 | 5459.42 15462.70 | 5465.98 | 5469.26 | 5472.54 | 5475.82
1670 |/5479.10| 5482.38 | 5485.66 | 5488.94 | 5492.23 |5495.51 | 5498.79 | 5502.07 | 5505.35 | 5508.63
1680 1/5511.91/5515.19 | 5518.47 | 5521.75 | 5525.03 |5528.32 | 5531.60 |5534.88 | 5538.16 | 5541.44
1690 |/5544.72 |5548.00 | 5551.28 | 5554.56 | 5557.84|5561.12 | 5564.40 | 5567.69 | 5570.97 | 5574.25 |
4
\
1700 ||5577.53 | 5580.81 84.09 | 5587.37) 5590.6515593.93 | 5597.21 |5600.49 | 5603.78 | 5607.06 |
1710 |/5610.34 | 5613.62 |5616.90| 5620.18 | 5623.46 15626.74 | 5630.02 | 5633.30 | 5636.58 | 5639.87 |!
1720 |/5643.15 |5646.43 |5649.71 | 5652.99 | 5656.27 5659.55 | 5662.83 | 5666.11 | 5669.39 | 5672.67 ||
1730 || 5675.96 | 5679.24 | 5682.52 | 5685.80 | 5689.08 ]5692.36 | 5695.64 | 5698.92 |5702.20 | 5705.48
1740 || 5708.76 |5712.05 | 5715.33 | 5718.61 | 5721.89 [5725.17 | 5728.45 | 5731.73 | 5735.01 | 5738.29 |
1750 (||5741.57|5744.85 |5748.14 | 5751.42 |5754.70|5757.98 | 5761.26 | 5764.54 | 5767.82 | 5771.10 |
1760 || 5774.38 |5777.66 | 5780.94 | 5784.23 | 5787.51 [5790.79 | 5794.07 | 5797.35 | 5800.63 | 5803.91 |
1770 ||5807.19 |5810.47 | 5813.75 |5817.03 | 5820.32 [5823.60 | 5826.88 | 5830.16 | 5833.44 | 5836.72
1780 ||5840.00 | 5843.28 | 5846.56 | 5849.84 | 5853.1215856.40 | 5859.69 | 5862.97 | 5866.25 | 5869.53 |
1790 ||5872.81|5876.09 | 5879.37 |5882.65 | 5885.93 [5889.21 | 5892.49 | 5895.78 | 5899.06 5902.34 |
1800 |/5905.62 |5908.90 | 5912.18 |5915.46 | 5918.74 |5922.02 | 5925.30 | 5928.58 | 5931.87 | 5935.15
1810 ||5938.43 |5941.71 | 5944.99 | 5948.27 | 5951.55 [5954.83 | 5958.11 |5961.39 | 5964.67 | 5967.96
1820 ||5971.24| 5974.52 |5977.80 |5981.08 | 5984.36 |5987.64 | 5990.92 | 5994.20 | 5997.48 | 6000.76 |;
1830 || 6004.05 | 6007.33 | 6010.61 | 6013.89 | 6017.17]6020.45 | 6023.73 | 6027.01 | 6030.29 | 6033.57
1840 ||6036.85 |6040.14 | 6043.42 | 6046.70 | 6049.98 ]6053.26 | 6056.54 | 6059.82 | 6063.10 | 6066.38
1850 ||/6069.66 | 6072.94 | 6076.23 |6079.51 | 6082.79 |6086.07 | 6089.35 | 6092.63 | 6095.91 | 6099.19
1860 |\6102.47 | 6105.75 | 6109.03 |6112.32|6115.60]6118.85 | 6122.16 |6125.44 | 6128.72 | 6132.00
1870 ||6135.28 | 6138.56 | 6141-84 |6145.12/ 6148.4016151.69 | 6154.97 |6158.25 | 6161.53 | 6164.81
1880 |'6168.09 | 6171.37 | 6174.65 |6177.93 | 6181.21|6184.49 | 6187.78 |6191.06 | 6194.34 | 6197.62
1890 ||6200.90 | 6204.18 | 6207.46 |6210.74 | 6214.02|6217.30 | 6220.58 |6223.87 | 6227.15 | 6230.43
1900 ||6233.71 | 6236.99 | 6240.27 |6243.55 | 6246.83]6250.11 | 6253.39 | 6256.67 | 6259.96 | 6263.24
1910 ||6266.52 | 6269.80 | 6273.08 |6276.36 | 6279.64|6282.92 | 6286.20 | 6289.48 | 6292.76 | 6296.05
1920 ||6299.33 | 6302.61 | 6305.89 | 6309.17 | 6312.1516315.73 | 6329.01 | 6322.29 | 6325.57 | 6328.85
1930 ||6332. 14 |6335.42 | 6338.70 | 6341.98 | 6345.26/6348.54| 6351.82 6355.10 | 6358.38 | 6361.66
1940 ||6364.94 | 6368.23 | 6371.51 | 6374.79 | 6378.07|6381.35 | 6384.63 | 6387.91 | 6391.19 | 6394.47
1950 ||6397.75 | 6101.03 | 6404.32 |6407.60 |6410.88}6414.16 | 6417.44 | 6420.72 | 6424.00 | 6427.28
1960 ||6430.56 | 6433.84 |6437.12 |6440.41 | 6443.6916446.97 | 6450.25 | 6453.53 |6456.81 | 6460.09
1970 ||6463.37 | 6466.65 |6469.93 | 6473.21 | 6476.49 16479.78 | 6483.06 | 6486.34 |6489.62 | 6492.90
1980 ||6496.18 | 6499.46 | 6502.74 |6506.02 | 6509.30]6512.58 | 6515.87 6519.15 |6522.43 6525.71
1990 ||6528.99 | 6532.27 |6535.55 |6538.83 | 6542.1116545.39 | 6548.67 | 6551.96 |6555.24 | 6558.52
2000 ||6561.80) 6565.08 | 6568.36 6571.64 | 6574.92|6578.20 | 6581.48 | 6584.76 | 6588.05 | 6591.38
0. 1. es 3. 4. d. 6. We
E 24

CONVERSION OF METRES INTO ENGLISH FEET AND DECIMALS. 471

2000 to 2399.

r
I Metres. (Units )
I| Metres.

6. \. ®: 2. s | & 5. 6. 7. S. 9. |

Eng.Feet.| Eng.Feet. | Eng. Feet. | Eng.Feet.| Eng.Feet.JEng.Feet. | Eng.Feet. | Eng.Feet | Eng.Feet.| Eng. Feet.

2000 ||6561.80| 6565.08) 6568.36 6571.64/ 6574.92 | 6578.20) 6581.48) 6584.76) 6588.05| 6591.33)
2010 ||6594.61| 6597.89) 6601.17|6604.45| 6607.73] 6611.01) 6614.29) 6617.57|6620.85| 6624.14
2020 ||6627 42| 6630.70) 6633.98] 6637.26 |6640.54| 6643.82) 6647.10) 6650.38| 6653.66) 6656.94,
2030 || 6660.23] 6663.51) 6666.79 6670.07 |6673.35 | 6676.63| 6679.91| 6683.19|6686.47| 6689.75
2040 |/6693.03| 6696.32| 6699.60) 6702.88 | 6706.16 | 6709.44) 6712.72) 6716.00|6719.28| 6722.56

2050 ||6725.84) 6729.12) 6732.41|6735.69| 6738.97 | 6742.25) 6745.53! 6748.81|6752.09| 6755.3
2060 ||6758.65)| 6761.93) 6765.21|6768.49 | 6771.78 | 6775.06) 6778.34| 6781.62|/6784.90| 6788.18
») 2070 ||6791.46| 6794.74) 6798.02/6801.30 6804.58 | 6807.87) 6811.15) 6814.43|6817.71| 6820.99
2080 ||6824.27| 6827.55) 6830.83/ 6834.11 6837.39 | 6840.67| 6843.96) 6847.24|6850.52| 6853.80
2090 ||6857.08)| 6860.36| 6863.64|/6866.92|6870.20] 6873.48] 6876.76) 6880.05|6883.33| 6886.61

2100 ||/6889.89| 6893.17| 6896.45) 6899.73 |6903.0116906.29| 6909.57) 6912.85|6916.14| 6919.42
2110 || 6922.70) 6925.98) 6929.26 | 6932.54 | 6935.82 | 6939.10] 6912.38) 6945.66|6948.94| 6952.23))
2120 |/6955.51| 6958.79| 6962.07 6965.35 |6968.63|6971.91| 6975.19) 6978.47|6981.75| 6985.03}
2130 |/6988.32} 6991.60) 6994.88) 6998.16|7001.44} 7004.72) 7008.00) 7011.28|7014.56| 7017.84
2140 ||7021.12)} 7024.41| 7027.69 | 7030.97 | 7034.25 | 7037.53) 7040.81) 7044.09| 7047.37] 7050.65),

I

2150 ||7053.93) 7057.21} 7060.49 | 7063.78 | 7067.06 | 7070.34| 7073.62) 7076.90/7080.18} 7083.46
2160 ||/7086.74| 7090.02) 7093.30) 7096.58) 7099.8717103.15| 7106.43| 7109.71|7112.99| 7116.27
2170 = |/7119.55| 7122.83) 7125.11/7129.39)|7132.67} 7135.96) 7139.24] 7142.52/7145.80| 7149.08
2180 |/7152.36| 7155.64) 7158.92|7162.20/7165.48] 7168.76) 7172.05| 7175.33/7178.61| 7151.89
2190 ||7185.17| 7188.45) 7191.73)7195.01 7201.57| 7204.85; 7208.14|7211.42| 7214.70

|

2200 ||7217.98) 7221.26) 7224.54|7227.82|7231.10 | 7234.38] 7237.66) 7240.94|7244.23) 7247.51
2210 |/7250.79| 7254.07| 7257.35 | 7260.63) 7263.91 | 7267.19| 7270.47| 7273.75|7277.03)| 7280.32
2220 || 7283.60| 7286.88) 7290.16 /7293.44|7296.72 | 7300.00| 7303.28] 7306.56|7309.84| 7313.12
2230 |/7316.41| 7319.69) 7322.97/7326.25| 7329.53 | 7332.81 | 7336.09) 7339.37|7342.65| 7345.93
2240 ||7349.21) 7352.49) 7355.78 |7359.06| 7362.34 | 7365.62] 7368.90) 7372.18|7375.46| 7378.74

2250 |/ 7382.02] 7385.30] 7388.58 /7391.87| 7395.15 | 7398.43| 7401.71) 7404.99] 7408.27) 7411.55
2260 ||7414.83) 7418.11) 7421.39| 7424.67) 7427.96 | 7431.24| 7434.52) 7437.80] 7441.08) 7444.36)
2270 ||7447.64| 7450.92) 7454.20) 7457.48] 7460.76 | 7464.05| 7467.33] 7470.61|7473.89) 7477.17
2280 || 7480.45) 7483.73| 7487.01|7490.29| 7493.57 | 7496.85| 7500.14) 7503.42| 7506.70) 7509.98
2290 |/7513.26| 7516.54) 7519.82|7523.10| 7526.38 | 7529.66| 7532.94| 7536.23) 7539.51| 7542.79

2300 |!7546.07| 7549.35) 7552.64| 7555.91) 7559.19 | 7562.47| 7565.75) 7569.03) 7572.32) 7575.60
2310 ||/'7578.88)| 7582.16) 7585.44) 7588.72| 7592.00 | 7595.28) 7598.56) 7601.84|7605.12) 7608.41
2320 || 7611.69| 7614.97) 7618.25) 7621.53 | 7624.81 | 7628.09 | 7631.37) 7634.65| 7637.93) 7641.21
2330 || 7644.50) 7647.78) 7651.06) 7654.34/ 7657.62 | 7660.90) 7664.18) 7667.46| 7670.74) 7674.02
2340 || 7677.30| 7680.58) 7683.87) 7687.15 | 7690.43 | 7693.71| 7696.99| 7700.27|7703.55| 7706.83

2350 ||7710.11| 7713.39| 7716.67) 7719.96 | 7723.24 | 7726.52| 7729.80] 7733.08|7736.36| 7739.64
2360 ||7742.92| 7746.20) 7749.48] 7752.76) 7756.05 | 7759.33| 7762.61| 7765.89|7769.17| 7772.45
2370 ||7775.73| 7779.01) 7782.29|7785.57| 7788.85 | 7792.14) 7795.42| 7798.70) 7801.98) 7805.26
2380 ||7808.54| 7811.82} 7815.10|7818.38| 7821.66 | 7824.94| 7828.23) 7831.51/7834.79| 7838.07
2390 ||7841.35) 7844.63) 7847.91| 7851.19) 7854.47 | 7857.75)| 7861.03, 7864.32) 7867.60) 7870.88

0. 1. 2, Be 4. De 6. Ze 8. 9.

472 CONVERSION OF METRES INTO ENGLISH FEET AND DECIMALS.
24690 to 2799.
Metres. (Units )
|| Metres. |j=-
vo. a. 2. 3. | 4. 5. 6. Zi. 8.
Big. Feet.! Ene Feet. Eng. Feet. | Eng.Feet | Bug iPeet. Eng. Feet |Eng.Feet. | Eng.Feet. Eng.Feet.| Eng. Feet.
24100 |/7874.16, 7877.44 7880.72 7884.00 7887.28 | 7390.56 | 7893.84) 7897.12 7900.41) 7903.69
2410 ||7906.97, 7910.25) 7913.53 7916.81 7920.09] 7923.37, 7926.65, 7929.93 7933.21 | 7936.50
2120 | 7939.78) 7943.06) 7946.34 7949.62 7952.90] 7956.18 7959.46 7962.74 7966.02) 7969.30
2130 ||7972.59) 7975.87 7979.15 7982.43 7985.71} 7988.99 | 7992.27, 7995.55 7998.83) 8002.11 |
|| 2440 |/3005.39) 8008.67 8011.96 8015.24 8018.52) 8021.80| 8025.08 8028.36 8031.64) 8034.92
2450 ||8038.20) 8041.48) 8044.76 8048.05/8051.33]8054.61 8057.89) 8061.17 8064.45) 8067.73
|| 2460 |/8071.01| 8074.29 8077.57 8080.85 8084.14} 8087.42) 8090.70) 8093.98 8097.26] 8100.54
| 2470 |'8103.82/ 8107.10) 8110 38/8113.66/8116.94]8120.22) 8123.51) 8126.79 8130.07] 8133.35
| 2480 |/5136.63) 8139.91) 8143.19 /8146.47 8149.75} 8153.03) 8156.32| 8159.60 8162.88) 8166.16
|| 2490 |/8169.44) 8172.72 8176.00 8179.28 8182.56}8185.84| 8189.12 8192.41 8195.69) 8198.97
| 2500 |/8202.25 8205.53) 8208.81 8212.09 $215.37] 8218.65| 8221.93) 8225.21'!8228.50| 8231.78
2510 8235.06) 8238.34) 8241.62) 8244.90 8248.15} 8251.46) $254.74] 8258.02 8261.30) 8264.59
2520 || 8267.87) 8271.15) 8274.43 8277.71 8280.99} 8284.27] 8287.55) $290.83 8294.11] $297.39
| 2530 ||8300.67) 8303.96) 8307.24 8310.52 8313.80{8317.08| 8320.36) 8323.64/8326.92| 8330.20
|| 2540 |/8333.48] 8336.76] 8340.05 8343.33 /8346.6118349.89| 8353.17| 8356.45 /8359.73| 8363.01
| 2550 ||8366.29| 8369.37| 8372.85 8376.14) 8379.42} 8382.70| 8385.98} 8359.26/8392.54| 8395.82
2560 |/8399.10| 8402.38} $405.66 8408.94 8412.23]8415.51) 8418.79 8422.07/8425.35| 8428.63
2570 |/8431.91| 8435.19] 8438.47) 8441.75 /8445.03 | 8448.32) 8451.60) 8454.88 8458.16] 8461.44
2580 |/84164.72| 8468.00) 8471.28/8474.56 8477.84] 8481.12] 8484.41) 8487.69|8490.97| 8494.25
2590 ||8497.53! 8500.81) 8504.09) 8507.37/8510.6518513.93| 8517.21) 8520.50/8523.78| 8527.06
2600 ||8530.34) 8533.62) 8536.90)8540.18)/ 8543.46 | 8546.74) 8550.02! 8553.30/8556.58| 8559.87
2610 ||8563.15| 8566.43} 8569.71 |8572.99 | 8576.27 | 8579.55| 8582.83) 8586.11/8589.39| 8592.67
2620 ||8595.96| 8599.24) 8602.52/8605.80| 8609.08 | 8612.36 | 8615.64) 8618.92 |8622.20| 8625.48
2630 ||8628.76| 8632.05| 8635.33/8638.61/8641.89 | 8645.17| 8648.45) 8651.73/8655.01) 8658.29
2640 || 8661.57) 8664.85| 8668.14/8671.42|8674.70 | 8677.98| 8681.26) 8684.54|/8687.82) 8691.10
2650 ||8694.38| 8697.66] 8700.91/8704.23/ 8707.51 18710.79| 8714.07| 8717.35/8720.63| 8723.91
2660 ||8727.19) 8730.47| 8733.75|8737.03/8740.32 | 8743.60] 8746.88) 8750.16|8753.44| 8756.72
2670 ||8760.00) 8763.28) 8766.56/8769.84/8773.12]|8776.41| 8779.69) 8782.97|/8786.25) 8789.53
2680 (3792.81 8796.09} 8799.37) 8802.65/ 8805.93 {8809.21 | 8812.50) 8815.78/8819.06| 8822.34
2690 ||8825.62/] 8828.90| 8832.18/8835.46/8838.74 | 8842.02) 8845.30! 8848.59/8851.87| 8855.15
2700 ||8858.43)] 8861.71! 8864.99!8868.27/8871.55 | 8874.83} 8878.11] 8881.39|8884.67| 8887.96
2710 ||8891.24) 8894.52) 8897.80/8901.08/8904.36 | 8907.64} 8910.92) 8914.20)/8917.48) 8920.76
| 2720 ||/8926.05| 8927.33] 8930.61/8933.89 | 8937.17] 8940.45| 8943.73) 8947.01/8950.29 8953.57
2730 ||8956.85) 8960.14] 8963.42) 8966.70/ 8969.98 | 8973.26] 8976.54) 8979.82 8983.10) 8986.38
|| 2740 |/8989.66| 8992.94) 8996.23|8999.51|9002.79 | 9006.07) 9009.35) 9012.63/9015.91) 9019.19
2750 ||9022.47) 9025.75} 9029.03 9032.32) 9035.60 9038.88} 9042.16) 9045.44/9048.72) 9052.00
2760 || 9055.28) 9058.56) 9061.84 9065.12 9068.41 9071.69| 9074.97) 9078.25 |9081.53) 9084.81
2770 | 9088.09) 9091.37) 9094.65 9097.93 9101.21] 9104.50) 9107.78) 9111.06/9114.34) 9117.62
| 2780 |/9120.90| 9124.18) 9127.46|9130.74 9134.02] 9137.30| 9140.59 9143.87/9147.15) 9150.43
|| 2790 ||9153.71) 9156.99 9160.27 9163.55 9166.83 | 9170.11| 9173.39) 9176.68 /9179.96 9183.24
0. 1. 2. Bi. OB. 5 6. 7. 8. 9.
|
—
E 26

Metres.

2800
2810
2820
2830
2840

2850
2860
2870
2880
2890

2900
2910
2920
2930
2940

2950
2960
2970
2980
2990
3000

CONVERSION OF METRES INTO ENGLISH FEET AND DECIMALS.

%. 1.

Eny.Peet. Eng. Feet.
9186.52 9189.80
9219.33 9222.61
9252.14:9255.42
9234.94 9288.23
9317.75 9321.03

9350.56 9353.84
9383.37 9386.65
9416.18 9419.46
9448.99 9452.27
9481.80 9485.08

9514.61) 9517.89

2800 to 3000.

Metres.

(Units )

2. 3.

Eng Feet. | E ig.Feet.
9193.08 9196.36
9225.89 9229.17
|9258.70 9261.98
|9291.51 9294.79
9321.32 9327.60

9360.41
9593.21
/9426.02
9458.83
9491.64

9357.12
9389.93
9422.74
9455.55
9488.36

9521.17

9547.42)
9580.23}
9613.03
9645.84

9678.62
9711.46
9744.27
9777.08
9809.89
9842.70

|

9550.70
9583.51
9616.32
9649.12

(9553.98

9619.60
9652.41

9681.93 9685.21
9714.74 9718.02
9747.55 9750.83
9780.36 9783.64
9813.17 9816.45
9845.98 9849.26

|9586.79|

9622.88
9655.69

9688.50
9721.30
(9754.11
9786.92
9819.73
9852.54

4.

Eng Feet.
/9199.64
9232.45
9265.26
9298.07
9330.88

9363.69
|9396.50
9429.30
9162.11
9494.92

5 | 9527.73

9560.54
9593.35
9626.16
9658.97

9691.78
9724.59
9757.39
9790.20
(9823.01
9855.82

3d.

Eug.Feet.
9202.92 |
9235.73 |
9268.54,
9301.35)
9334.16

9366.97
9399.78
9432.59
9465.39)
9498.20

9531.01
9563.82
9596.63
9629.44
9662.25

9695.06
9727.87
9760.68
9793.48 |

/9501.48

6.

Eng. Feet.|
9206.20.
9239.01
9271.82
9304.64,
9337.44

9370.25
9403.06
9435.57
9468.68)

9534.29}

Ve

Eng.Feet.
9209.45
9242.29
9275.10
9307.91
9340.72

9373.53
9406.34
9439.15
9471.96
9504.76

9537.57

9567.10 9570.38
9599.91 9603.19
9632.72 9636.00
9665.53 9668.81

9698.34 9701.62
9731.15|/9734.43
9763.96 9767.24
9796.76 | 9800.05

9826.29 |9829.57|9832.85 9836.14
9859.10 9862.35 9865.66 9868.94

8. 9.

Eng.Feet.
9216.05
9248.85
9281.66
9314.47
9347.28

Eng.Feet.
9212.76
|9245.57
|9278.38
9311.19
/9344.00

9376.81
9409.62
9442.43
9475.24
9508.05

9380.09
9412.90
9445.71
|9478.52
$511.33

9544.14
9576.94
9609.75
|9642.56
|\9675.37

9540.85
9573.66
9606.47
9639.28
9672.09

|9708.18
9740.99
9773.80
9806.61
9839.42
9872.23

9704.90
9737.71
9770.52
9803.33

Proportional Parts.

Metres.

0.

Eng. Feet.
0.0000
3.2809
6.5618
9.8127

13.1236

16.4045
19.6854
22.9663

26.2472
29.5281

0.

Decimetres.

1. 2.

Eng.Feet.|Eng.Feet,
0.3281] 0.6562
3.6090| 3.9371
6.8899| 7.2180
10.1708 |10.4989
13.4517/13.7798

ieee ee bebe
20.0135 20.3416
23.2944 23.6225
26.5753 26.9034

29.8562 30.1843

1. 2.

3.

Eng. Feet.
0.9843
4.2652
7.5461

10.8270

14.1079

17.3888
20.6697
23.9506
27.2315

30.5124

Be

Eng.Feet.
| 1.3124
4.5933
7.8742
(11.1551
14.4360

117.7169
20.9978
124.2787
27.5596
30.8405

4.

Eng. Feet
1.6404
4.9213
8.2022

11.4831

14.7640

18.0449
21.3258
24.6067
27.8876

31.1685

5.

Ze

Eng.Feet
1.9685
5.2494
8.5303

11.8112

15.0921

Eng.Feet
2.2966
5.5775
8.8584

12.1393

15.4202

18.7011
21.9820
25.2629
28.5438
31.8247

18.3730
21.6539
24.9348
28.2157
31.4966

6. Ge

9.

8.

Eng.Feet.
2.6247
5.9056
9.1865

12.4674

15.7483

Eng Feet.
2.9528
6.2337
9.5146

12.7955

|16.0764

19.0292] 19.3573
22.3101! 22.6382
25.5910} 25.9191
28.8719 29.2000
31.1528) 32.4809

8.

Ee

474

VIII. CONVERSION OF METRES INTO RHINE OR PRUSSIAN FEET AND DECIMALS.
1 Metre = 3.1861995 Rhine Feet.

Hundreds.
Metres.
Thousands.) @, 100. 200. | 300. | 400. | 560. | 600. 700. 8O0G.| 900.
Rhine ft./ Rhine ft. Rhine ft. Rhine ft.| Rhine ft.}Rhine ft.|Rhine ft. |Rhine ft. lhine ft.| Rhine ft.
0 0.0) 318.6} 637.2) 955.9) 1274.5] 1593.1) 1911.7) 2230.3) 2549.0) 2867.6
1000 3186.2] 3504.8) 3823.4) 4142.1) 4460.7] 4779.3) 5097.9| 5416.5| 5735.2) 6053.8
2000 6372.4] 6691.0} 7009.6) 7328.3) 7646.9] 7965.5) 8284.1) 8602.7| 8921.4} 9240.0
3000 9558.6] 9877.2)/10195.8)10514.5)10833.1)11151.7|)11470.3/11788.9 12107. 6)12426.2
4000 |)12744.8/13063.4)13382.0 13700.7/14019.3}14337.9/14656.5|14975.1/)15293.8/15612.4
5000 |/15931.0)16249.6)16568.2/16886.9|17205.5}17524.1|17842.7 |18161.3)18480.0|18798.6
6000 |/1911'7.2)19435.8)19754.4/ 20073.1|20391.7}20710.3)/21028.9 |21347.5 |21666.2/21984.8
"000 ||22303.4/22622.0)22940. 6/23259.3)23577.9]23896.5|24215.1 | 24533.7 |24852.4/25171.0
8000 |/25489.6]25808.2)26126.8/26445.5|26764.1/27082.7/27401.3 |27719.9 |28038.6|28357.2
9000 ||28675.8}28994.4)29313.0)29631.7/29950.3}30268.9 |30587.5 /30906.1 /31224.8/31543.4
IX. CONVERSION OF METRES INTO FEET OF VIENNA.
1 Metre = 3.1637488 Vienna Feet.
Metres. Hundreds.
Thousands! @, | 100. | 200. | 300. | 400. | 560. | 600. | 700. | 860. | 900.
Vien. tt. view ft.| Vien. ft.| Vien. ft. Vien. ft.] Vien. ft.) Vien. ft.| Vien. ft.| Vien. ft.) Vien. ft.
0 0.00) 316.37] 632.75) 949.12)1265.50)1581.87)1898.25 |2214. 62)/2531.00|2847.37
1000 3163.7, 3480.1] 3796.5} 4112.9| 4429.2) 4745.6] 5062.0] 5378.4] 5694.7) 6011.1
2000 6327.5| 6653.9] 6960.2] 7276.6) 7593.0] 7909.4] 8225.7] 8542.1) 8858.5) 9174.9
3000 9491.2 9807.6|10124.0)10440.4/10756.8]11073.1)11389.5 |11705.9|12022.3/12338.6
4000 |/12655.0 12971.4|13287.7)/13604.1)13920.5)14236.9]14553.3 |14869.6)15186.0)15502.4
|
5000 /15818.'716135.1|16451.5|16767.9|17084. 2117400. 6]17717.0|18033.4|18349.7|18666.1
6000 ]18982.5 19298.9}19615.2/19931. 6|20248.0}20564.4)20880.7 |21197.1/21513.5|21829.9
7000 = ||22146.2 22462. 6|22779.0/23095.4/23411.7/23728. 1124044. 5 |24360.9]24677.2/24993.6
S000 | 25310.0 25626.4 25942.8]}26259.1/26575.5]26891.9/27208.2 |27524. 6|/27841.0/28157.4!
9000 ||28473.7 28790.1/29106.5}29422.9/29739.2)30055. 6/30372.0 |30688.4/31004.7/31321.1
Units.
Tens. :
0. 1. 2S 3. | 4. dD. 6. fe Ss. 9. ¥.
| Vien. ft.| Vien. ft.] Vien. ft.) Vien. ft.) Vien. ft.] Vien. ft.] Vien. ft.| Vien. ft.] Vien. ft.] Vien. ft.
0 0.00 3.16 6.33 9 AD) 12565) 15.82) 18598) 2255 253i 28047
10 31.64, 34.80! 37.96] 41.13} 44.29] 47.46] 50.62) 53.78) 56.93] -60.11
20 63.27| 66.54) 69.60] '72.77) '75.93] 79.09] 82.26] 85.42) 88.58] 91.75
30 94.91; 98.08] 101.24) 104.40) 107.57] 110.73] 113.89) 117.06] 120.22) 123.39
AO 126.55) 129.71] 132.88] 136.04) 139.20] 142.37] 145.53] 148.'70] 151.86] 155.02
50 158.19} 161.35) 164.51) 167.68) 170.84) 174.01] 177.17] 180.33} 183.50] 186.66
60 189.82} 192.99) 196.15) 199.32) 202.48] 205.64) 208.81} 211.97) 215.13] 218.30
70 221.46] 224.63 227.79 230.95] 234.12] 237.28] 240.44) 243.61] 246.77] 249.94:
80 253.10} 256.26 259.43, 262.59] 265.75] 268.92) 272.08) 275.25) 278.41) 281.57
90 || 284.74) 287.90) 291.06 294.23, 297.39] 300.56) 303.72) 306.88) 310.05) 313.21
E

28

|
pee

Thousands.

1000
2000
3000
4000

5000
6000
7000
8000
9000

10000
11000
12000
13000
14000

15000
16000
17000
18000
19000

20000
21000
22000
23000
24000

25000
26000

Wa

475

TO CONVERT

PARIS, OR} FRENCH FEET

Ke

0.

Toises.
0.00
166.67
333.33
500.00
666.67

833.33
1000.00
1166.67
1333.33
1500.00

1666.67
1833.33
2000.00
2166.67
2333.33

2500.00
2666.67
2833.33
3000.00
3166.07

3333.33
3500.00
3666.67
3833.33
4000.00

4166.67
4333.33

INTO DIFFERENT MEASURES OF LENGTH.

100.

Toises.
16.67
183.33
350.00
516.67
683.33

850.00
1016.67
1183.33
1350.00
1516.67

1683.33
1850.00
2016.67
)2183.33
2350.00

2516.67
2683.33
2850.00
3016.67
3183.33

3350.00
3516.67
3683.33
3850.00
4016.67

4183.33

1 French Foot = 0.1666666 Toise.

200. | 300.

Toises.
50.00
216.67
383.33
550.00
716.67

Toises.
33.33
200.00
566.67
533.338
700.00

866.67
1033.33
1200.00
1566.67
1533.33

883.33
1050.00
|1216.67
1383.33
1550.00

1700.00
1866.67
2033.33
2200.00
2366.67

1716.67
1883.33
2050.00
2216.67
2383.33

2533.33 2550.00
|2700.00|2716.67
|2866.67|2883.33
3033.33 /3050.00
3200.00/3216.67

3366.67 | 3383.33
3533.33 /3550.00
3700.00|3716.67
3866.67 |3883.33
4033.33 4050.00

4200.00 | 4216.67

4350.00

isch aaa

Hundreds.

400. | 500.

Toises
83.33
250.00
416.67
583.33
750.00

Toises.
66.67
233.33
400.00
566.67
733.33

900.00} 916.67
1066.67} 1083.33
1233.33] 1250.00
1400.00] 1416.67
1566.67] 1583.33

1733.33]1750.00
1900.00} 1916.67
2066.67 2083.33
2233.33) 2250.00
2400.00} 2416.67

2733.33}2750.00
2900.00} 2916.67
3066.67| 3083.33
3233.33] 3250.00

3100.00] 3416.67
3566.67) 3583.33
3733.3313750.00
3900.00} 3916.67
4066.67} 4083.33

4233.33] 4250.00
4400.00) 4416.67

29

2566.67} 2583.33)

600.

Toises.

100.00
266.67
433.33
600.00
766.67

933.33
1100.00
1266.67
1433.33
1600.00

1766.67
1933.33)
2100.00
2266.67
2433.33

2600.00
2766.67
(2933.33
3100.00
3266.67

|3433.33
3600.00
3766.67
3933.33
4100.00

4266.67
4433.33

CONVERSION OF PARIS OR FRENCH FEET INTO TOISES.

800.

700.

Toises.

133.33
300.00
466.67
633.33
800.00

Toises.

116.67
283.33
450.00
616.67
753.33

966.67
1135.33
1300.00
| 1466.67
1633.33

950.00
1116.67
1283.33
1450.00
1616.67

1800.00
1966.67
2133.33
2300.00
2466.67

1783.33
1950.00
2116.67
2283.33
2450.00

2633.33
2800.00
2966.67
3133.33
3300.00

2616.67
2783.33
2950.00
3116.67
3283.33

3450.00 3466.67
3616.67| 3633.33
3783.33 3800.00
3950.00 3966.67
4116.67 4133.33

4283.33 4300.00

cee an.

900.

Toises-

150.00
316.67
483.33
650.00
816.67

983.35
1150.00
1316.67
1483.33
1650.00

1816.67
1983.33
2150.00
2316.67
2483.33

2650.00
2816.67
2953.33
3150.00
3316.67

3483.33
3650.00
3816.67
3983.33

4150.00,

4316.67
4483.33

XI.

1 Paris Foot = 0.52485855 Metres.

CONVERSION OF PARIS OR FRENCH FEET INTO METRES.

We

Metres.
0 000.00

1000 | 324.84

2000 | 649.68

3000 || 974.52
|} 4000 | 1299.36
i
) 5000 || 162420
, 6000 | 1949.04
I 7000 | 2273.88
|} $000 | 2598.72
| 9000 | 2923.55
# 10000 | 3248.39
| 31000 || 3573.23
i} 12000 | 3898.07
} 13000 | 4222.91
| 14000 | 4547.75
'
| 15000 | 4872.59
+ 16000 5197.43
i} 17000 || 5522.27
| sooo |5847.11
| 19000 | 6171.95

20000 = 6496.7

| 21000 | 6821.63
22000 || 7146.47
j 23000 ||7471.31
i 24000 7796.15
| 25000 $120.99
| 26000 ($445.83
| 27000 |'s770.66

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400. | 560.

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wo |
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4352.38
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wr
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6951.56
7276.40
7601.24
7926.08

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3410.81 34438.

5
4060.49 4092.
4385.33
4710.0

5035.01 5
3359.8
5684.6
6009.5
6334.3

“0 © O
DD Ie
wo
De
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of
— =)

6691.69
7016.53
7341.37
7666.21
7991.05

6659.21
6984.05
7308.89
7633.73
7958.57

on
i]
wm Ww
SOW &
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5.78 3508.27 3540.75
).62 3833.11 3865.59)|
94 4190.43)
2.78) 4515.27
807.52 4840.01

ow
—
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4157.

|
i

2.46 5164.95
57.30 5489. a
5749.66 5782.14 5814. 63
6074.50 6106.98 6139.47
6399.34 6431.82 6464.30

5099.98

6724.18 6756.66 6789.14},
7049.02 7081.50 7113.98)
7373.86 7106.34 7438.82)
7698.69 7731.18 7763.66
$023.53 8056.02 S0S8.50

7 $380.86 $413.34
1 8705.70 8738. 1s)
5 9030.54 9063.02

0 0.0000

10 3.2484

20 =| 6.4968

| 30 9.7452
i} 40 12.9936
» '
| 50 16.2420
| 60 19.4904
| 70 22.7388
| $0 25.9872
+ 90 29.2355

6.8216
10.0700
13.3184

7.1465
10.3949
13.6433

16.5668 16.8916
19 $152 20.1400
23.0636 23.3884
26.3120 26.6368
29.5604 / 29.8852

7.4713
10.7197
13.9651

17.2165
20.4649
23.7133
26.9617
30.2101

7.7961
11.0445
14.2929

17.5415
20.7897
24.0381
27.2865
30.5349

1.6242
4.8726) 5.1974
8 eae 8.4458)

14. 6178 14. "9126 15.2

17.8662 18.1910 18.51

21.1146 21.4394 :
24.3630 24.6878
27.6114 27.9362.

30.8597 31.1846 3

2.2739) 2 aaa 2.9236

5.5223 | 5.8471, 6.1719

B) Bea707 9.0955, 5205

a1 1 12.3439 12.6687

i 15.5923 15.9171
|

S|18.8407 19.1655
= 22.0891 22.4139
5.0126) 25.3375 25.6623|
$.2610 28.5859 28. 9107]
1.5094/31.8343 32. 32.1591

s ot

2
2

3U

ates

477
XII. CONVERSION OF PARIS OR FRENCH FEET INTO ENGLISH FEET AND DECIMALS.

1 French Foot = 106576527 English Feet.

Hundreds.

200. 300. 460. | 300. 600. 700. 800. 900...

| Eng. feet Eng feet. Eng feet. Eng feet. Eng. feet. | Eng feet. Eng feet. Eng feet. Eng feet. Eng feet
9

0 | 0.0, 106.6 213.2, 319.7, 426.3) 532.9 639.5 746.0 $52.6 959.2

1000 || 1065.8) 1172.3, 1278.9 1385.5 1492.1] 1598.6 1705.2, 1811.8 1918.4 2025.0)

| 2000 || 2131.5) 2238.1, 2344.7) 2451.3, 2557-8] 2664.4, 2771-0 2877.6, 2984.1 3090.7
| 3000 || 3197.3, 3303.9 3410.4, 3517.0 3623.6] 3730.2 3836.8) 3943.3 4049.9 4156.5
4000 || 4263.1 4369.6 4476.2, 4582.8 4689.4] 4795.9 4902.5 5009.1 5115.7, 5222.3

| 5000 || 5328.8 5435-4 5542.0, 5648.6 5755.1| 5861.7 5968.3, 6074.9 6181.4, 6258.0,
6000 «| 6394.6 6501.2 6607.7 6714.3 6320.9} 6927.5 7034.1 7140.6 7247.2 7353.8
| 7000 |) 7460.4, 7566-9 7673.5 7780.1 7586.7] 7993.2 8099.8 $206.4 $313.0 8419.5
8000 || 8526.1 8632.7, $739.3 $845.9 $952.4) 9059.0 9165.6 9272.2 9378.7 9485.3
9000 | 9591.9 9695.5 9805.0 9911.6 1018.2] 10124.8 10231.3 103379 10444.5 10551.1,

| 10000 | 10657.7/10764.2 10870.8 10977.4 11084.0} 11190.5 11297.1 11403.7 11510.3 11616.8
| 11000 11723.4 11830.0 11936.6 12043.1 12149.7} 12256.3 12362.9 12469.5 12576.0 12682.6
| 12000 12789.2 12895.8 13002.3 13108.9 13215.5 | 13322.1 13428.6 13535.2 13641.8 13748.4
| 13000 | 13855.0 13961.5 14068.1 14174.7 14251.3] 14387.8 14494.4 14601.0 14707.6 14514.1
14000 | 14920.7 15027.3 15133.9 15240.4| 15347.0| 15453.6 15560.2 15666.8 15773.3 15879.9,,
| |
| 15000 | 15986.5 16093.1 16199.6 16306.2 16412.8 16519.4 16625.9 16732.5 16839.1 16945.7
16000 | 17052.2 17158.8 17265.4 17372.0 17478.6 | 17585.1 17691.7 17798.3 17904.9 15011.4
17000 | 18118.0 18224.6 18331.2 18437.7)18544.3 | 18650-9 18757.5 18864.0 18970.6 19077.2
18000 (| 19183.8 19290.4 19396.9 19503.5 19610.1/ 19716.7 19823.2 19929.8 20036.4 20143.0
19000 /20249.5 20356.1 20462.7 20569.3 20675.8 | 20782.4 20859.0 20995.6 21102.2 21208.7
i] | } |
| 20000 |21315.3 21421.9 21528.5 21635.0 21741.6 | 21848.2 22054.8 22161.3 22167.9 22274.5
21000 || 22381.1 22487.7 22594.2 22700.8 22807.4 | 22914.0 23020.5 23127.1 23233.7 23310.3 |)
| 22000 || 23446.8 23553.4 23660.0 23766.6 23873.1 | 23979.7 24086.3 24192.9 24299.5 24406.0 |
23000 || 24512.6 24619.2 24725.8 | 24832.3 24938.9 | 25045.5 25152.1 25258.6 25365.2 25171.8
| 24000 asa ene 25791.5 25898.1 26004.7 | 26111.3 26217.8 2632+4.4 26131.0 26537.6
| |
I 25000 | 26644. 1 26750.7 26857.3 26963.9 27070.4 | 27177.0 27283.6 27390.2 27196.7 27603.3 !
26000 | 2770: 09.9 27816.5 27923.1 28029.6 28136.2 | 28242.8 28349.4 28455.9 28562.5 28669.1
27000 |28775.7 28882.2 289S8.8 29095.4 29202.0} 29308.5 29415.1 29521.7 29628.3 29734.9
SSS 7sT SS]
| Units. |
SS eee
| ieee a bos i 2 | s. | pees |. ss: |-9.4
| Eng. feet. Eng feet. Eng. feet. Eng.feet. Eng.feet. | Eng feet. Eng feet. Eng feet. Eng feet. Eng feet .
0 | 0.000 | 1.066 | 2.132) 3.197 4.263 5.329| 6.395, 7.460) 8.526) 9.592
10 || 10.658 | 11.723 | 12.789 | 13.855 | 14.921] 15.986 17.052 18.118) 19.184 20.250
| 20 l 21.315 | 22.381 | 23.447 | 24.513 | 25.578] 26-644) 27.710, 28.776) 29.841 30.907
30 I 31.973 | 33.039 34.104 35.170 36.236] 37.302) 38.368 39.433 40.499 41.565
40 | 42.631 | 43.696 | 44.762 | 45.828 46.894] 47.959 49.025 50.091 51.157 52.223
} : ! i
| 50 i 53.288 | 54.354 | 55.420 56.486 57.551} 58.617 59.683 60.7419 61-814 62.850
60 || 63.946 | 65.012 | 66.077 | 67-143 68.209} 69.275, 70.341 71.406 72.472 73.538))
70 1 74.604 | 75.669 | 76.735 77.801 78.867] 79.932 80.998 52.0614 §3.130 84.195)
80 | 85.261 | 86.327 | 87.393 88.459 | 89.524] 90.590 91.656 92.722 93.787 94.853)
| 90 , 95.919 96.985 98.050 99.116 100.182) 101.248 102.313 103.379 104.445 105.511),
Pe ee a a ne A ee EC as Be Se dS eR ee | SWE

478

XIII. CONVERSION OF PARIS OR FRENCH FEET INTO RHINE OR PRUSSIAN FEET.
1 Paris Foot = 1.03500323 Rhine Foot.

French Hundreds
Feet. | : = aaa =
‘Thousands, O+ | 100. | 200. | 360. | 460.1500. | 600.) 700. | Sed. | 900.
|| Rhine ft. Rhine ft. Rhine ft. [Rhine ft.| Rhine ft.|Rhine ft.| Rhine ft.) Rhine ft. | Rhine ft. | Rhine ft.
0 0.00, 103.50 207.00, 310.50] 414.00] 517.50) 621.00) 724.50) 828.00) 931.50
1000 | 1035.00/1138.50/1242.00 1345.50) 1449.00]1552.50/1656.00) 1759.51 1863.01) 1966.51
2000 ||2079.01)2173.51/2277.01 2380.51)/2484.01/2587.51/2691.01) 2794.51 2898.01) 3001.51
3000 |3105.01)/3208.51|3312.01 3415.51 3519.01)3622.51/3726.01| 3829.51] 3933.01) 4036.51
4000 4140.01) 4243.51/4307.01 4450.51/4554.01/4657.51/4761.01, 4864.51) 4968.01) 5071.51
5000 ||51'75.01/5278.52/5382.02/5485.52)5589.02) 5692.52 5796.02) 5899.52) 6003.02) 6106.52
6000 |(6210.02/ 6313.52|6417.02|6520.52|6624.0216727.52/6831.02) 6934.52) 7038.02) 7141.52
7000 = (||7245.02) 7348.52 7452.02/7555.52 7659.0217762.52, 7866.02) 7969.52 8073.02) 8176.52
8000 8280.02 8383.52/8487.02 8590.52)8694.03 8797.53 8901.03) 9004.53 9108.03) 9211.53
9000 |9315.03 9418.53/9522.03 9625.53)/9729.03 9832.53/9936.03 10039.53 10143.03 10246.53)
10000 |/10350. 0)10453.5 10557.0)10660.5/10764.0]10867.5/10971.0 11074.5| 11178.0) 11281.5
11000 ||11385.0/11488.5/11592.0/11695.5/11799.0}11902.5/12006.0| 12109.5) 12213.0| 12316.5
12000 |/12420.0)12523.5]12627.0)12730.5|12834.0/12937.5|13041.0) 13144.5| 13248.0) 13351.5
13000 113455.0|13558.5 13662.0/13765.5|13869.0}13972.5|14076.0| 14179.5| 14283.0| 14386.5
14000 |/14490.0)14593.5|14697.0/14800.5|14904.0115007.5/15111.0) 15214.5) 15318.0) 15421.5
15000 |/15525.0)15628.4 15732.0/15835.5 15939.0}16042.5/16146.0 16249.5) 16353.0) 16456.6
16000 |/16560.1 16663.6/16767.1/16870.6|16974.1]17077.6)17181.1 17284.6| 17388.1| 17491.6
17000 117595.1/17698.6 17802.1|17905.6)18009.1118112.6)18216.1) 18319.6) 18423.1) 18526.6
18900 |'18630.1 18733.6/18837.1!18940.6)19044.1119147.6)19251.1) 19354.6 19458.1) 19561.6
19000 |19665.1 19768.6 19872.1/19975.6|20079.1]20182.6/20286.1| 20389.6) 20493.1) 20596.6
20000 | 20700. al asaak 6|20907.1/21010. 6) 21114. 1121217.6/21321.1) 21424.6) 21528.1| 21631.6
21000 21735. 1/21838.6/21942.1/22045.6)22149. 1122252. 6)22356.1|} 22459.6| 22563.1| 22666.6
92000 |/22770.1 | 22873. 6|22977.1/23080. 6) 23184. 1123287.6/23391.1]} 23494.6) 23598.1) 23701.6
23000 1/23805.1)23908.6/24012.1)/24115.6) 24219.1]24322.6)24426.1) 24529.6) 24633.1) 24736.6
24000 | 24840. 9 24943.6|25047.1/25150. 6) 25254. 1125357.6|25461.1| 25564.6| 25668.1) 25771.6
25000 |/25875.1 '25978.6 26082.1)26185.6)26289.1126392.6/26596.1| 26699.6| 26703.1) 26806.6
26000 |/26910.1/ 27013. 6|27117.1/27220. 6/27324. 1)27427.6|27531.1| 27634.6| 27738.1| 27841.6
27000 279 945.1 28048. 6|28152.1/28255.6/28359.1/28462. 6/28566.1 28669.6) 28773.1| 28876.6
28000 |/28980.1 29083.6)/29187.1)29290.6/ 29394. 1129497.6)29601.0) 29704.6| 29808.0) 29911.6
Units.
Tens.
0. | 3. A. De Ge alone 8. 2:
\|Rhine ft | Rhine ft.| Rhine ft.| Rhine ft.| Rhine ft.]Rhine ft. | Rhine ft.! Rhine ft. | Rhine ft. | Rhine ft.
0 0.00 1.04 | 2.07 Saal! 4.14 5.18 6.21 (eZ Ele) MSe28 9.32
1O || 10:35 | 11.39 | 12:42 | 13:46 | 145495 }15.53 |-16:56 17.60 18.63 19.67
20 20.70 | 21.74 | 22.77 | 23.81 | 24.84 | 25.88 | 29.91 27.95 28.98 30.02
30 31.05 | 32.09 | 33.12 | 34.16 | 35.19 | 36.23 | 37.26 38.30 39°33 40.37
40 41.40 | 42.44 | 43.47 ; 44.51 | 45.54 | 46.58 | 47.61 48.65 49.68 50.72
50 HID) 52079) || S8ss2u! H4.86eoosogey| oO.) | Onege 59.00 60.03 61.07
60 62.10 | 63.14 | 64.17 | 65.21 | 66.24 ] 67.28 | 68.31 69.35 70.38 71.42
70 72.45 | 73.49 | 74.52 | 75.56 | 76.59 | 77.63 | 78.66 79.70 80.73 81.77
80 82.80 | 83.84 | 84.87 | 85.91 | 86.94 | 87.98 | 89.01 90.05 91.08 92.12
90 93.15 | 94.19 | 95.22 | 96.26 | 97.29 | 98.33 | 99.36 | 100.40 | 101.43 | 102.47
E 32

e

XIV. CONVERSION OF PARIS OR FRENCH FEET INTO FEET OF VIENNA. 49
1 Paris Foot = 1.027710.
French Hundreds.
Feet. = |
Thousands. 0. 100. 200. 300. 400. 3900. 600. 700. 800. 900. |
ign ft. Wion. ft.|Vien. ft.)/Vien. ft.| Vien. ft. view ft. View ft. View! ft. Wien. fi, aan ft.
0 0.00) 102.77] 205.54! 308.31} 411.08] 513.85} 616.63) 719.40} 822.17] 924.94)
1000 (1027.71 1130.48/1233.25/1336.02/1438.7911541.56)1644.34! 1747.11} 1849.88) 1952.65
9000 ||/2055.42)2158.19/2260.96|2363.73)2466.50]2569.27|2672.05| 2774.82) 2877.59) 2980.36
3000 |/3083.13/3185.90)3288.67/3391.44/3494.21]3596.98)3699.76| 3802.53) 3905.30) 4008.07
4000 |/4110.84/4213.61/4316.38/4419.15|4521.92]4624.69|4727.47| 4830.24) 4933.01] 5035.78
5000 |5138.55 9241.52 5344.09 5446.86 5549.6315652.40|5755.18| 5857.95! 5960.72] 6063.49].
6000 |16166.26|6269.03/6371.80) 6474.57| 6577.34]6680.11/6762.89) 6885.66) 6988.43] 7091.20
7000 ||7193.97|7296.74)7399.51/7502.28|7605.05]7707.82|7810.60) 7913.37) 8016.14) 8118.91),
8000 |/8221.68)8324.45 8427.22/8529.99/ 8632.76]8735.53/8838.31) 8941.08) 9043.85) 9146.62)|
9000 |/9249.39 9352.16/9454.93 9557.70 9660.4719763.24/9866.02) 9968.79 10071.56)10174.33
10000 =||10277.1 10379.9 10482.6 10585.4 10688.2}10791.0)/10893.7| 10996.5) 11099.3) 11202.0
11000 |/11304.8)11407.6)11510.4|/11613.1)11715.9}11818.7|11921.4| 12024.2) 12127.0) 12229.7
12000 |/12332.5/12435.3/12538.1/12640.8|12743.6]12846.4)12949.1) 13051.9| 13154.7| 13257.5
13000 //13360.2)15463.0/13565.8)13668.5)13771.3113874.1|13976.9| 14079.6) 14182.4) 14285.2
14000 |/1438'7.9|14490.7/14593.5|14696.3|/14799.0}14901.8)15004.6) 15107.3) 15210.1) 15313.8
15000 |/15415.6}15518.4)15621.2)15724.0/15826.7]15929.5|16032.3) 16135.0) 16237.8| 16340.6
16000 ||16443.4|16546.1/16648.9|16751.7|16854.4116957.2|/17060.0) 17162.8) 17265.5| 17368.3
17000 |\17471.1|17573.8)17676.6'17779.4|17882.2117984.9|18087.7| 18190.5| 18293.2) 18396.0
18000 ||18498.8]18601.6/18704.3)18807.0/18909.9}19012.6)19115.4| 19218.2) 19320.9| 19423.7
19000 /|19526.5)19629.3)19732.0)19834.8)19937.6}20040.3/20143.1| 20245.9) 20348.7| 20451.4)|
20000 1120554. 2|/20657.0/20759.7/20862.5)20965.3}21068.1/21170.8| 21273.6, 21376.4| 21479.1
21000 ||21581.9|21684.7/21787.5|21890. 2/21993.0)22095.8|22198.5) 22301.3) 22404.1] 22506.8
22000 |122609.6|22712.4/22815.2/2291'7.9)23020. 7|23123.5|23226.2| 23329.0) 23431.8| 23534.6
93000 ||23637.3/23740. 1123842. 9|23945.6|24048.4124151.2/24254.0| 24356.7| 24459.5) 24562.3
24000 ||24665.0/24767.8 24870.6 24973.4 25076.1]25178.9|25281.7| 25384.4| 25487.2) 25589.0
25000 /25692.'7|25795.5 25898.3 26001.1 26103.8}]26206.6/26309.4| 26412.1|.26514.9| 26617.7;
96000 ||26720.5|26823.2/26926.0)/27028.8/27131.5|27243.3/27337.1| 27439.9| 2'77542.6| 27645.4
27000 = |127'748.2/27850.9|27953.7/ 28056.5)28159.3]28262.0 28364.8| 28467.6| 285'70.3] 28673.1
28000 |/28775.9|28878.7 28981.4 29084.2/29187.0]29289.7/29392.5) 29495.3) 29598.0| 29700.8
Units.
Tens. . : 5
A 0. ee) teh) MT MEE) | oe: Wo ||A8. 9.
Vien. ft.| Vien. ft.| Vien. ft.| Vien. ft.| Vien. ft.|Vien. ft.| Vien. ft.| Vien. ft. | Vien. ft. | Vien. ft.
0 0.00 1.03 2.06 3.08 4.11 5.14 6.17 elo 8.22 9.25
10 10.28 | 11.30 | 12.33 | 13.36 | 14.39 | 15.42 | 16.44 17.47 18.50 N9r53
90 20.55 | 21.58 | 22.61 | 23.64 | 24.67 | 25.69 | 26.72 27.75 28.78 29.80
30 30.83 | 31.86 | 32.89 | 33.91 | 34.94 | 35.97 | 37.00 38.03 39.05 40.08
40 41.11 | 42.14 | 43.16 | 44.19 | 45.22 | 46.25 | 47.27 48.30 49.33 50.36
50 51.39 | 52.41 | 53.44 | 54.47 | 55.50 | 56.52 | 57.55 58.58 59.61 60.63
60 61.66 | 62.69 | 63.72 | 64.75 | 65.77 | 66.80 | 67.83 68.86 69.88 70.91
70 71.94 | 72.97 | 74.00 | 75.02 | 76.05 | 77.08 | 78.11 Molto 80.16 81.19
80 82.22 | 83.24 | 84.27 | 85.30 | 86.33 | 87.36 | 88.38 89.41 90.44 91.47
90 92.49 | 93.52 | 94.55 | 95.58 | 96.60 | 97.63 | 98.66 99.69 | 100.72 | 101.74
K 33

480

TO CONVERT

ENGLISH) YAR DSgAND hh Ee

INTO DIFFERENT MEASURES OF LENGTH.

XV. CONVERSION OF ENGLISH YARDS INTO FRENCH TOISES.,

1 English Yard — 0.4691465 Toise.

, Hundreds.
English
' Yards
| Thousands. || @, 100. | 200. | 300. | 400. | 500. 600. | 700. | 800. | 900.
———— = — = ee i = mS
Toises. Toises. Toises Toises. | Toises Toises. Toises Toises. | Toises. Toises.
0 0.00 46.91 93.83) 140.74] 187.66] 234.57) 251.49] 328 40) 375.32| 422.23
1000 469.15} 516.06| 562.98] 609.89| 656.80] 703.72) 750.63| 797.55) 844.46) 891.38
2000 938.29| 985.21) 1032.12) 1079.04|1125.95]1172.87 1219.78| 1266.70) 1313.61 | 1360.52
3000 1407.44] 1454.35 | 1501.27) 1548.18) 1595.10 1642.01 1688.93 1735.84] 1782.76 | 1829.67
4000 1876.59 | 1923.50| 1970.41 | 2017.33] 2064.24 ]2111.16 | 2158.07) 2204.99) 2251.90 | 2298.82 ||
5000 2345.73 | 2392.65 | 2439.56 | 2486.48 | 2533.39] 2580.31 2627.22) 2674.13 2721.05 2767.96
6000 2814.88 | 2861.79 | 2908.71 | 2955.62 |3002.54130419.45 | 3096.37| 3143.28) 3190.20) 3237.11
7000 3284.02 |3330.94| 3377.85 | 3424.77 | 3471.68 3518.60 3565.51 | 3612.43) 3659.34 | 3706.26
8000 3753.17 | 3800.09 | 3847.00 | 3893.92 | 3940.8313987.74 4034.66) 4081.57 4128.49) 4175.40
9000 4222.32 | 4269.23/4316.15|4363.06| 4409.98 }4456.89 4503.81)|4550.72| 4597.63 | 4644.55
—
XVI. CONVERSION OF ENGLISH YARDS INTO METRES.
1 English Yard = 0.91438348 Metre.
| Hundreds.
English
Yards.
Thousands. 0. 100. | 200. | 300. | 400. | 500. | 600. | 700. 800. 900.
| rah Metres. Meee Metres Meta Metres. Meus Metres. | Metres. | Metres. | Metres.
0 0.00 91.44] 182.88] 274.32] 365.75] 457.19] 548.63} 610.07] 731.51] 822.95
1000 914.38 | 1005.82) 1097.26 |1188.70/1280-14]1371.58 1463.01 1554.45 1645.89 1737.33
2000 1828.77) 1920.21/2011.64| 2103.08] 2194.52}2285.96 2377.40 2468.84 2560.27 2651.71
3000 2743.15| 2834.59 | 2926.03 | 3017.47|3108.90)3200.34/3291.78 | 3383.22 | 3474.66 3566.10
4000 3657.53 3748.97 | 3840.41 |3931.85| 4023.29] 4114.73 | 4206.16|4297.60/ 4389.04 4480.48
5000 4571.92 | 4663.36 | 4754.79 |4816.23]| 4937.67]5029.11 5120.55 |5211.99 5303.42|5394.86
6000 5486.30) 5577.74/5669.18|5760.62|5852.0515943.49 6034.93 6126.37 6217.81 | 6309.25),
7000 6100.68 | 6492.12] 6583.56 |6675.00|6766.44]16857.88 |6949.31| 7040.75 7132.19 7223.63
8000 7315.07) 7406.51| 7497.94 | 7589.38 | 7680.82 7772.26 7863.70 7955.14 8046.57/8138.01
9000 8229.45 | 8320.89 |8412.33|8503.77/8595.20 8686.64 8778.08 8869.52 8960.96 9052.40)

E

34

|
|

|

XVII. CONVERSION OF ENGLISH FEET INTO METRES. 481
1 English Foot = 0.380479449 Metre.
| ii ——— = ———= aa al
English | Hundreds.
Feet. = = = = |
Thousands.||_ 9, | 100. | 200. | 300. | 400. | 500. | 690. | 700. | 800. | 900. )
| Metres. Motes Metres. | Metres. | Metres. | Metres. Asibos: Meta Monee Meteell |
0 |/000.000|30.4794 | 60.9589 |91.4383)| 121.918] 152.397) 182.877 213.356 243.836 | 274.315 1
1000 304.794/335.274| 365.763 | 396.233 | 426.712] 457.192) 487.671 /518.151 548.630/579.110 |
| 2000 ||609.589/640.068 | 670.548 | 701.027 | 731.507 | 761.986 | 792.4166 | 822.945 853.425|883.904 |
3000 ||914.383/944.863 |975.342| 1005.82) 1036.30] 1066.78 | 1097.26| 1127.74 | 1158.22|1188.70 ||
4000 1219.18} 1249.66] 1280.14) 1310.62] 1341.10] 1371.58 | 1402.05| 1432.53 | 1463.01) 1493.49
5000 1523.97/1554.45| 1584.93) 1615.41| 1645.89} 1676.37 | 1706.85) 1737.33 | 1767.81) 1798.29
6000 1828.77| 1859.25] 1889.73) 1920.21) 1950.68 | 1981.16 2011.64 | 2042.12 | 2072.60| 2103.08 |;
7000 2133.56 |2164.04/2194.52| 2225.00 | 2255.48 | 2285.96 | 2316.44 | 2346.92 | 2377.40) 2407.88 |
8000 2438.36|2468.84 | 2499.31 | 2529.79 | 2560.27 | 2590.75 | 2621.23) 2651.71 | 2682.19 | 2712.67
9000 2743.15|2773.63 | 2804.11 | 2834.59 | 2865.07 | 2895.55 | 2926.03) 2956.51 | 2986.99 |3017.47 |
10000 3017.94/3078.42 3108.90 /3139.38| 3169.86 | 3200.34 | 3230.82/3261.30/3291.78|3322.26 |
11000 3352.74|3383.22 |3413.70| 3444.18 | 3474.66 | 3505.14 3535.62| 3566.10 3596.57 3627.05 |
12000 3657.53 |3688.01|3718.49 3748.97|3779.45 | 3809.93 | 3840.41 | 3870.89 3901.37/\3931.85 |
13000 3962.33 |3992.81 | 4023.29 | 4053.77! 4084.25] 4114.73) 4145.21 4175.68 4206.16 4236.64
14000 4267.12 | 4297.60 | 4228.08 | 4358.56) 4389.04 | 4419.52) 4450.00) 4480.48 4510.96 4541.44
| 15000 4571.92 |4602.40|4632.88| 4663.36 | 4693.84] 4724.31 | 4754.79| 4785.27 | 4815.75 | 4846.23
16000 4876.71 | 4907.19 | 4937.67 | 4968.15) 4998.63 | 5029.11 | 5059.59) 5090.07/5120.55/5151.03 !
| 17000 5181.51/5211.99/ 5242.47 | 5272.94| 5303.42 | 5333.90| 5364.38 5394.86) 5425.34 5455.82 |
| 18000 5486.30)5516.78 | 5547.26 | 5577.74 | 5608.22 | 5638.70| 5669.18 5699.66 5730.14 5760.62
19000 5791.10|5821.57)| 5852.05) 5882.53| 5913.01 | 5943.49 | 5973.97 6004.45 6034.93 6065.41
20000 6095.89 /|6126.37|6156.85| 6187.33 | 6217.81 | 6248.29 | 6278.77| 6309.25 6339.73|6370.20
21000 6100.68 |6431.16| 6461.64) 6492.12| 6522.60] 6553.08 | 6583.56|6614.04 6644.52|6675.00
22000 = |!6705.48|6735.96| 6766.44 | 6796.92 | 6827.40 | 6857.88 | 6888.36|6918.83 6949.31|6979.79 |
23000 7010.27/7040.75| 7071.23) 7101.71| 7132.19 | 7162.67| 7193.15 7223.63 7254.11| 7284.59 |
24000 7315.07)|7345.55| 7376.03 | 7406.51 | 7436.99 | 7467.47 | 7197.94 7528.42 7558.90 7589.38 ||
| 25000 7619.86 /7650.34| 7680.82 /7711.30| 7741.78 | 7772.26 | 7802.74| 7833.22 7863.70) 7894.18
26000 7924.66 |7955.14| 7985.62 8016.10| 8046.57 | 8077.05|8107.53 8138.01, 8168.49|8198.97
27000 = |/8229.45/8259.93/8290.41)| 8320.89 | 8351.37] 8381.85 | 8412.33/8442.81 8473.29 8503.77
28000 | 8534.25 |8564.73| 8595.20 8625.68 | 8656.16 | 8686.64|8717.12 8747.60 8778.08 8808.56 |
{
| Units
| Tens =e It ae a |
| 0. 1. 2. 3. 4. 5. 6. Ze &. 9.
| a | Metres. | Metres Matias: Metres. Melee: Metres. | Metres. are Monee... Mata
0 0.00000) 0.30479) 0.60959) 0.91438) 1.21918 | 1.52397) 1.82877) 2.13356 |2.43836|2.74315
10 3.04794 | 3.35274 | 3.65753 | 3.96233) 4.26712} 4.57192| 4.8767115.18151 |5.48630|5.79110
20 6.09589 | 6.40068 | 6.70548 | 7.01027) 7.31507 | 7.61986) 7.92466] 8.22945 |8.53425/8.83904
39 9.14383) 9.44863 | 9.75342 | 10.0582) 10.3630] 10.6678 10.9726 |11.2774111.5822 11.8870
40 12.1918] 12.4966 | 12.8014) 13.1062) 13.4110] 13.7158) 14.0205) 14.3253) 14.6301 14.9349 |
1
} 50 15.2397) 15.5445| 15.8493 | 16.1541] 16.4589 | 16.7637| 17.0685) 17.3733) 17.6781) 17.9829 |
60 18.2877) 18.5925) 18.8973 | 19.2021 | 19.5068 | 19.8116) 20.1164) 20.4212 | 20.7260) 21.0308 |}
70 21.3356) 21.6404) 21.9452 | 22.2500 / 22.5548 | 22.8596) 23.1644 23.4692 23.7740 24.0788 I
80 24.3836 | 24.6884) 24.9931 | 25.2979 | 25.6027 | 25.9075 | 26.2123) 26.5171 |26.8219/ 27.1267
90 27.4315 27.7363 | 28.0411 | 28.3459 28.6507 | 28.9555 | 29.2603) 29.5651 |29.8699| 30.1747 |
E 30

489

a ES aa ap © ESSE A SO

XVIII. CONVERSION OF ENGLISH FEET INTO FRENCH OR PARIS FEET AND DECIMALS.
1 English Foot = 0.9382929 Paris Foot.
Hundreds.
English — ||
|. Feat. jis = 5
Thousands.| @, | 100. (200. 300. 400. | 500. 600. | 700. 800. 900. |
| Par. Feet. | Par. Feet. Par.Feet. Par Feet Par Feet. Par Feet. Par Feet. Par Feet Par. Feet Par Feet. 4
0 000.0 93.3) 187.7) 281.5] . 375.34 469.1 563.0|. 656.8] . 750.6) 844.5
1000 938.3] 1032.1] 1126.0) 1219.8] 1313.6] 1407.4) 1501.3) 1595.1] 1688.9} 1782.8
2000 1876.6 1970.4) 2064.2| 2158.1} 2251.9 2345.7, 2439.6) 2533.4 2627.2) 2721.0
3000 2814.9] 2908.7) 3002.5] 3096.4) 3190.24 3284.0; 3377.9) 3471.7) 3565.5] 3659.3
! 4000 3753.2| 3847.0} 3910.8} 4034.7) 4128.5 4222.3) 4316.1) 4410.0! 4503.8] 4597.6
5000 4691.5| 4785.3) 4879.1] 4973.0) 5066.8] 5160.6) 5254.4) 5348.3) 5442.1 5535.9;
6000 5629.8| 5723.6; 5817.4) 5911.2) 6005.1] 6098.9; 6192.7) 6286.6) 6380.4) 6471.2
7000 6568.0} 6661.9) 6755.7) 6849.5| 6943.4] 7037.2) 7131.0) 7224.9) 7318.7) 7412.5
8000 7506.3| 7600.2| 7694.0) 7787.8) 7881.7) 7975.5) 8069.3| 8163.1) 8257.0) 8350.8
9000 8444.6) 8538.5) 8632.3) 8726.1} 8820.0] 8913.8} 9007.6) 9101.4] 9195.3) 9289.1
10000 9382.9| 9476.8] 9570.6) 9664.4] 9758.2] 9852.1) 9945.9.10039.7/10133.6 10227.4
11000 10321.2/10415.0 10508.9 | 10602.7) 10696.5)10790.4, 10884.2)10978.0)11071.9'11165.7
12000 11259.5|11353.3!11447.2)11541.0 11634.8)11728.7 11822.5)11916.3)12010.1)12104.0
13000 | 12197.8 12291.6/12385.5 12479.3)|12573.1 12667.0 12760.8 12854.6 12948.4|13042.3 |
14000 13136.1)13229.9 | 13323.8| 13417.6;13511.4)13605.2)|13699.1)| 13792.9|13886.7) 13980.6|;
15000 14074.4]14168.2 | 14262.0 14355.9 14449.7 14543.5 14637.4 14731.2 14825.0 14918.9
16000 15012.7/15106.5 | 15200.3) 15294.2,15388.0) 15481.8 | 15575.7 15669.5 | 15763.3|15857.1'
17000 15951.0) 16044.8 16138.6, 16232.5) 16326.3)16420.1|16514.0 16607.8|16701.6|16795.4
18000 16889.3)|16983.1)17076.9| 17170.8 | 17264.6) 17358 .4 17452.2, 17546.1/17639.9 17733.7
| 19000 17827.6)17921.4|18015.2 18109.0|18202.91 18296.7 18390.5 18484.4,18578.2)18672.0
| 20000 18765.9| 18859.7) 18953.5| 19047.3 | 19141.2119235.0| 19328.8 | 19422.7/19516.5| 19610.3
21000 19704.1)19798.0) 19891.8)19985.6 20079.5!20173.3|20267.1 20361.0 20454.8 20548.6
22000 20642.4 20736.3 20830.1) 20923.9 21017.8 21111.6)/21205.4|21299.2 21393.1|21486.9
23000 21580.7|21674.6 | 21768.4|21862.2|21956.0} 22049.9 | 22143.7 | 22237.5 | 22331.4/22425.2
24050 22519.0)|22612.9 | 22706.7| 22800.5 22894.3] 22988.2 23082.0|23175.8 23269.7|23363.5|
|
25000 || 23457.3/23551.1 23645.0| 23738.S 23832.6 23926.5 /24020.3 24114.1 |24208.0 24301.8)
26000 || 24395.6 24459.4 24583.3 24677.1 24770.9 24864.8 24958.6 25052.4 25146.2 25240.1)
27000 25333.9 | 25427.7 | 25521.6| 25615.4)25709.2] 25803.1 |25896.9 25990.7 26084.5|26178.4
25000 | 26272.2|26366.0 26159.9 26553.7 26647.5] 26741.3 26835.2 26929.0 27022.8) 27116.7
Units.
Tens. 7
0. 1. 2. 3. 4. de 6. Ze 8. 9.
Par. Feet,| Par. Feet.) Par Feet.) Par, Feet.) Par. Feet.|| Par. Feet | Par. Feet. Par. Feet. Par. Feet. Par. Feet. |
| 0 0.00 0.94 1.88 2.81 3.75 4.69 5.63 6.57 7.51 8.44
10 9.38 10.32 | 11.26 12.20 13.14 14.07 | 15.01 5.95 16.89 17.83
20 18.77 19.7C | 20.64 | 21.58 22.52 23.46 | 24.40.) 25.33 | 26.27 | 27.21
30 28.15 | 29.09 | 30.03 | 30.96 | 31.90 S2.84) eddeCSalotet AniliisasOO! || 0.09
40 37.53 | 38.47 | 39.41 40.35 | 41.28 42.22 | 43.16 | 44.10 | 45.04 |! 45.98
| 50 46.91 47.85 | 48.79 | 49.73. | 50.67 51.61 52.54 | 53.48 | 54.42 | 55.36
60 56.30 | 57.24 | 58.17 | 59.11 | 60.05 60.99 | 61.93 | 62.87 | 63.80 | 64.74
70 65.68 | 66.62 | 67.56 | 68.50 | 69.43 OSS Faull erg ced Lim led et Ore inde all levace alice |
80 75.06 | 76.00 | 76.94 | 77.88 | 78.82 79.75 | 80.69 | 81.63 | 82.57 | 83.51
90 84.45 | 85.38 | 86.32 | 87.26 | 88.20 | 89.14 | 90.08 | 91.01 | 91.95 | 92.89
E 36

XIX. CONVERSION OF ENGLISH FEET INTO RHINE OR PRUSSIAN FEET, 483
1 English Foot = 0.9711362 Rhine Foot.

English Hundreds,

———— a oe =||
Dbnken dst 0. 100. | 200. . 300. A400. 506. | 600. 400. | sdc. | 960. |

|

Rhino ft.|Rhine f|Bbine ft: Rhine fei Rhine ft. Bhine it| Rhine ft,| Rhine ti.|Rhine fv. Rhine ft.
0 || 0.00/ 97.12) 194.23 291.34! 388.45] 485.57| 582.68] 679.80 776.91 874.02]
1060 | 971.14) 1068.25] 1165.36 1262.48 1359.59}1456.70|1553.82) 1650.93 1748.05 1845.16)
2000 _ |/1942.27/2039.39/2136.50 2233. 61 2330. '75}2427. 84/2524. 95|2622.07/2719.18 2816.29
3000 |,2913.41/3010.52 3107.64 3204.75 3301,86 3398.98 3496.0913593.20 3690.32/3787.43
4000 ||3884.54/3981. 66/4078. 77.4175.89|4273.0014370.11/4467.23|4564.34/4661.4514758.57
5000 |'4855.68/4952.79 abstention 5244. 14'5341.25|5438.36/5535.48|5632.5915729.70
6000 |'5826.82/5923.93 6021.04 6118.16 6215.2716312.39|6409.5016506.61 6603.73/6700.84
7000 ||6797.95 6895.07 6992.18 7089.29 7186.41 7283.52|7380.64|7477.75|7574.8617671.98
8000 |'7769.09|7866. 20| 7963.32, 8060.43 8157.54 8254. 6618351.77/8448. 88) 8546.00|8643.11
9000 |'8740.23/8837.34) 8934.45/9031.57 9128. 68.9225. 79)9322.91|9420.02'9517.1319614.25

10000 9611.4) 9808.5) 9905.6/10002. 7 10099.8/10196.9|10294.0|10391.2)10488.3)10585.4
11000 ||10682.5)/10779.9|10876.7 10973.8'11071.0111168.1 11265.2)11362.3)11459.4/11556.5
12000 |/11653.6)11750.7 11847.9)11945.0 12042. 12139.2]/12236.3)12333.4)12430.5|12527.7
13000 ||12624.8/12721.9/12819.0)12916.1)13013.2,13110.3]13207.5|13304. 6) 13401.7/13498.8
14000 |/13595.9/13693.0 13790.1)/13887.2 Bas. 14178.6)14275.7|14372.8) 14469.9

15000 |14567.0)14664.2 14761.3/14858.4 14955.5/15052.6|15149.7|15246.8)15344.0/15441.1
16000 ||15538.2/15635.3)15732.4 15829.5 15926.616023.7 16120.9]16218.0/16315.1 16412.2
17000 |/16509.3 16606.4'16703.5/16800.7,16897.8 16994.9|17092.0/17189.1/17286.2,17383.3
18000 |,17480.5/17577.6/17674.7,17771.8 17868.9.17966.0}18063.1)18160.2)18257.4)18354.5

19000 |/18451.6|18548.7|18645.8)/18742.9/18840.0[18937.2/19034.3/19131.4)19228.5/19325.6

| 20000 119422.7 19519.8)19617.0)19714.1)19811.2}19908.3|20005.4/20102.5 20199.6)

20296.7
21000 || 20393.9/20491.0/20588.1/20685.2/ 20782. 3]26879.4|20976.5/21073.7|/21170.8 21267.9]|
22000 |/21365.0/21462.1)21559.2/21656.3/21753.2]21850.6|21947.7|22044. 8/22141.9 22239.0

So bd

7 2
|| 23000 | 22336.1)22433.2/22530.4!22627.5/22724 ¢ 122821 .'7/22918.8|/23015.9|/23113.0/23210.2
24000 | 23307.3)23404.4/23501.5 23598. 6|23695.7|23792.8|23889.0|23987.1124084.2/24181.3

25000 | 24278.4)24375.5|24472. 6)24569.7/24566.9124764. 0/24861.1/24958.2)/25055.3 25152.4
26000 ||25249.5)25346.7|25443.8'25540.9/ 25638.0;25735.1/25832.2/25929.3)26026.5|26123.6
| 27000 ||26220.7/26317.8)26414.9 26512.0/ 26609. 126706. 2/26803.4|26900.5/26997.6 27094.7
| 28000 |) 27191.8)/27288.9|27386.0 27483. 2) 27580.3/27677.4/27774.5|27871.6|27968.7 | 28065.8

Units.

| Tens. —— = = ————————

0. 1. Ze. 3. 4d. od. 6. ate &. 9.

Rhine ft.| Rhine ft./Rhine ft.| Rhine ft.| Rhine ft.]Rhine ft. Rhine ft.| Rhine ft. Rhine ft.| Rhine ft.
0 0.00 0.97 1.94 2.91 3.88 4.86 5.83 6.80 Coe 8.74

10 9.71 | 10.68 | 11.65 | 12.62 | 13.60 | 14.57 | 15.54 | 16.51 | 17.48 | 18.45

| 20 19.42 | 20.39 | 21.36 | 22.34 | 23.31 | 24.28 | 25.25 | 26.22 | 27.19 | 28.16

30 29.13 | 30.11 | 31.08 | 32.05 | 33.02 | 33.99 | 34.96 | 35.93 | 36.90 | 37.87

| 40 38.85 | 39.82 | 40.79 ; 41.76 | 42.73 | 43.70 | 44.67 | 45.64 | 46.61 | 47.59

50 48.56 | 49.53 | 50.50 | 51.47 | 52.44 | 53.41 | 54.38 | 55.35 | 56.33 | 57.30
60 58.27 | 59.24 | 60.21 | 61.18 | 62.15 | 63.12 | 64.09 | 65.07 | 66.04 | 67.01
70 67.98 | 68.95 | 69.92 | 70.89 | 71.86 | 72.84 | 73.81 | 74.78 | 75.75 | 76.72
80 77.69 | 78.66 | 79.63 | 80.60 | 81.58 | 82.55 | 83.52 | 84.49 | 85.46 | 86.43
90 87.40 | 88.37 | 89.34 | 90.32 | 91.29 | 92.26 | 93.23 | 94.20 | 95.17 | 96.14

GY Eas ne ol me Salas ene liaeee A loee s
EK 31

484 XX. CONVERSION OF ENGLISH FEET INTO FEET OF VIENNA.
1 English Foot = 0,9642932 Foot of Vienna,
English | Hundreds.
Feet. =
‘Thousands. O. | 100.) 200. 300. | 400.| 500.) 600. 700. Soe. S00.
|| Vien. ft.|Vien. ft.|Vien. ft.) Vien. ft. Vien. ft.| Vien. ft.| Vien. feulvaent ft.| Vien. ie. Vien. ft. |
0 0.00} 96.43] 192.86) 289.29] 385.72] 482.15) 578.58) 675.01 771.43, 867.86
1000 964.29|1060.72}1157.15 1253.58)1350.01)1446.44/1542.87 1689.30 1735.73 1832.16
2000 ||1928.59}2025.02 2121.45 2217.87 2314.30]2410.73|2507.16 2603.59 2700.02 2796.45
3000 ||2892.88]2989.31|3085.74 3182.17/3278.60]3375.03/3471.46/3567.88|3664.31/3760.74
4000. ||3857.17/3953.60|4050.03 4146.46)4242, 89]4339.32|4435.75|4532.18 4628.61|4725.04
5000 ||4821.47)4917.90/5014.32 5110.75|5207.18]5303.31/5400.04 civ anloeos oleae =
6000 |[5785.76/5882.19|5978.62 6075.05|6171.48]6267.91| 6364.34 6460.76 6557-19 6653.62
7000 ||6750.05|6846.48]6942.91|7039.34|7135.77]/7232.20|7328. 63 (ELD OG balsa (oNioe
8000 7714.35) 7810.77|7907.20 8003.63/8100.06]8196.49|8292.92' 8389.35) 8485.78|/8582.21
9000 ||8678.64;8775.07/8871.50; 8967.93/9064.36]9160.79/9257.21)93538. 64 9450.07|9546.50
10000 |'9642.93/9739.36|9835.79 9932.22) 10028. 6]10125.1/10221.5/10317.9:10414.4/10510.8
11000 ||10607.2'10703.7/10800.1 10896.5)10992.9]11089.4/11185.8 11282.2/11378.7 11475.11!
12000 //11571.5)11667.9)11764.4|11860.8)11957.2]12053.7/12150.1/12246.5)12343.0]12439.4
13000. ||12535.8/12632.2|12728.7|/12825.1/12921.5]13018.0)13114.4/13210.8/13307.2113403.7
14000 = //13500.1/13596.5|13693.0|13789.4]13885.8]13982.3}14078.7|14175.1)14271.5|14368.0
15000 | 14464.4/14560.8/14657.3)14753.7/14850.1]14946.5/15043.0/15139.4 15235.8/15332.3
16000 |/15428.7 15525.1/15621.5|15718.0)15814.4]15910.8|16007.3 16103.7 16200.1 16296.6)|
17000 ||16393.0/16489.4'16585.8|16682.3|16788.7}16885.1'16971.6 17068.0 17164.4 17260.8
18000 ||17357.3|17453.7/17550.1|17646.6]17743.0]17839.4/17935.9|18032.3)18128.7|18225.1||
19000 //18321.6/18418.0)18514.4/18610.9)}18707.3]18803.7/18900.1|18996.6)19093.0/19189.4
20000 ||19285.9/19382.3/19478.7|19575.2/19671.6]19768.0/19864.4/19960.9/20057.3|20153.7
21000 = |/20250.2/ 20346. 6|20443.0/20539.4/20635.9120732.3]20828.7|20925.2/21021.6/21118.0
22000 |/21214.5|21310.9|21407.3|21503.7/21600.2}21696.6/21793.0|21889.5/21985.9/22082.3
23000 122178.7|22275.2 22371. 6|/22468.0)22564.5}22660.9|22757.3/22853.7/22950.2/23046.6
24000 = ||23143.0)23239.5)23335.9/23432.3)/ 23528. 8]23625.2|23721.6/23818.0)23914.5|24010.9
25000 |/24107.3/24203.8|24300.2/24396.6/ 24493. 0]24589.5|24685.9|24782.3/24878.8|24975.2
26000 ||25071.6/25168.1|25264.5/25360.9|25457.3]25553.8/ 25650. 2/25 746. 6/25843.1/25939.5
27000 |/26035.9/26132.3)26228.8/26325.2/26421.6]26518.1/26614.5|26710.9/ 26807.4/26903.8
28000 |/27000.2/27096.6/27193.1)27289.5|27385.9]27482.4|27578.8) 27675.2|27771.6/27868.1
Units.
Tens, :
0. 1. 2. 3. 4. Dd. 6. 4. 8. 95
Vien. ft.) Vien. ft | Vien. ft.) Vien. ft.) Vien. ft.;Vien. ft. | Vien. ft.| Vien. ft.|Vien. ft.) Vien. ft. ||
0 0.00 0.96 1.92 2.89 3.85 4.82 5.78 6.75 Tolle leesos
10 9.64.) 10.61 | 11.57 | 12.54 ) 13.50 | 14.46: | 15.43 | 16.39 | 17.36 || 18.32
20 19.29 | 20.25 | 21.21 | 22.18 | 23.14 } 24.11 | 25.07 | 26.04 | 27.00 | 27.96
30 28.93 | 29.89 | 30.86 | 31.82 | 32.79 | 33.75 | 34.71 | 35.68 | 36.64 | 37.61
40 38.57 | 39.54 | 40.50 | 41.46 | 42.43 | 43.39 | 44.36 | 45.32 | 46.29 | 47.25
| 50 || 48.21 | 49.18 | 50.14 | 51.11 | 52.07 | 53.04 | 54.00 | 54.96 | 55.93 | 56.89
60 57.86 | 58.82 | 59.79 | 60.75 | 61.71 | 62.68 | 63.64 | 64.61 | 65.57 | 66.54
70 67.50 | 68.46 | 69.43 | 70.39 | 71.36 | 72.32 | 73.29 | 74.25 | 75.21 | 76.18
80 77.14 | 78.11 | 79.07 | 80.04 | 81.00 }| 81.96 | 82.93 | 83.89 | 84.86 | 85.82
90 86.79 | 87.75 | 88.71 | 89.68 | 90.64 | 91.61 | 92.57 | 93.54 | 94.50 | 95.47
_———— ees

E

38

TO CONVERT

485

Rl keen VAN D PF REMET OR “VLE N NA

INTO DIFFERENT MEASURES OF LENGTH.

X XI. CONVERSION OF KLAFTER OF VIENNA INTO METRES.

1 Klafter of Vienna = 1.8964843 Metres.

|
Klafter of Hundreds.
|| Vienna.
|Thousands.|| @. 100. | 200. | 300. | 460. | 500. | GOO. | 700. | SOO. | 900. |
| Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres.
0 0.00) 189.65) 379.30| 568.95} 758.59] 948.24/1137.89]1327.54 1517.19 1706.84
1000 |}1896.48)2086.13|2275.78| 2465.43) 2655.08 |2844. 73/3034. 37|3224.02 3413.67 3603.32
2000 ||3'792.97|3982.62/4172.27/4361.91|4551.56 14741.21|4930. 36/5120.51/5310.16 5499.80
3000 15689.45/5879.10) 6068. 75|6258.40| 6446.05 16637.69|6827.34|7016.99|7206.64 7396.29
4000 ||7585.94/7775.59)|7965.23) 8154.88)8344.53 18534. 18/8723.83}8913.48)9103.12'9292.77
5000 9482.4| 9672.1) 9861.7 10051.4)10241.0]10430.7)10620.3/10810.0 eee ieee
6000 |11378.9)11568.6)11758.2)11947.9)12137.5 |12327.2)12516.8)12706.4/12896.1)13085.7
7000 = |!13275.4|13465.0,13654.7|13844.3)14034.0 114223. 6/14413.3)14602.9|14792.6 14982.2
8000 ||15171.9}15361.5 15551.2) 15740.8)15930.5 |16120.1)16309.8)16499.4 16689.1/16878.7
9000 |17068.4|17258.0 17447.7/17637.3|17827.0118016. 6]18206.3|18395.%|18585.6,18775.2)
Klafter. Units.
Tens. 0. ms 2. Se 4. od. 6. Me 8. 9.
| Metres. | Metres. | Metres. , Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres.
0 0.00 1.90 3.79 5.69 Wee 9.48; 11.38} 13.28} 15.17) 17.07
10 18.96; 20.86) 22.76) 24.65] 26.55] 28.45) 30.34) 32.24) 34.14) 36.03
20 37.93} 39.83) 41.72) 43.62) 45.52) 47.41) 49.31) 51.21) 53.10} 55.00
30 56.89) 58.79) 60.69] 62.58) 64.48] 66.38) 68.27} 70.17) 72.07| 73.96
40 75.86) 77.76) 79.65) 81.55) 83.45] 85.34) 87.24) 89.13] 91.03) 92.9
50 94.82) 96.72) 98.62) 100.51) 102.41] 104.31) 106.20) 108.10) 110.00) 111.89
60 113.79) 115.69) 117.58) 119.48) 121.37] 123.27) 125.17) 127.06} 128.96] 130.86
70 132.75| 134.65) 136.55) 138.44) 140.34] 142.24! 144.13) 146.03] 147.93] 149.82
a 80 151.72) 153.62) 155.51) 157.41) 159.30 161.20; 163.10) 164.99) 166.89] 168.79
90 170.68 172.58) 174.48| 176.37) 178.27] 180.17) 182.06] 183.96) 185.86] 187.74

39

486 XXIT.

1 Klafter of Vienua = 5.838222 Paris Feet.

_—

CONVERSION OF KLAFTER OF VIENNA INTO PARIS OR FRENCH FEET.

Klafter of | Hundreds.
Vienna. — - - -- -
' | |
Thousands’ @, 160. 200. | 300. 400.| 560. 600.| 700. | S00.) SCO.
\] y = -
| | Paris ft.| Paris ft.| Paris ft.) Paris ft.) Paris ft.] Paris ft.| Paris ft.| Paris ft.| Paris ft Paris ft
0 0.0} 583.8) 1167.6) 1751.5] 2335.3] 2919.1) 3502.9] 4086.8] 4670.6] 5254.4
1000 5838.2) 6422.0) 7005.9] 7585.7| 8173.5] 8757.3) 9341.2] 9925.0/10508.8)11092. 6
| 2000 |\11676.4)12260.3]12844.1/13427.9]14011.7]14595.6|15179.4115763.2116347.0/16930.§
3000 }17514.7]18098.5118682.3]19266.1]19850.0120433.8]21017.6/21601.4|22185.2/22769.1
__ 4000 _ ||23352.9|23936.7|24520.5|25104.4|25 688. 2}26272. 0|26855.8|27439.6|280-3.5|28607.3
Klafter, Units.
Tens. oe. 1. 2. Se A. a De Gu Ie S. 9.
Paris ft.| Paris ft.| Paris ft. Paris ft.| Paris ft.; Paris ft.| Paris ft.| Paris ft.) Paris ft.! Paris ft.
0 0.00 5.84! 11.68) 27.51) 23.35] 29.19 35.03! 40.87) 46.71) 52.54
10 58.38) 64.22) 70.06) 75.90) 81.74] 87.57} 93.41] 99.25] 105.09) 110.93
| 20 116.76] 122.60) 128.44] 134.28] 140.12] 145.96) 151.79) 157.63] 163.47) 169.31
| 30 |) 175.15] 180.98} 186.82) 192.68} 198.50] 204.34] 210.1€] 216.01] 221.85) 227.69
|| 40 || 233.53) 239.37) 245.21) 251.04] 256.88} 262.72] 268.5¢| 274.40] 280.23) 286.07
50 291.91] 297.75) 303.59] 309.43) 315.26] 321.10] 326.94] 332.78] 338.62] 344.46
60 350.29] 356.13) 361.97] 367.81] 373.65] 379.48] 385.32] 391.16] 397.C0} 402.84
70 408.6€| 414.51) 420.3f] 426.19] 432.03] 437.87} 443.70] 449.54) 455.36] 461.22
80 467.06] 472.90) 478.72] 484.57) 490.41] 496.25] 502.08] 507.93) 513.76) 519.60
90 || 525.44] 531.28] 537.12| 542.95] 548.79| 554.63| 560.47] 566.31] 572.15] 577.98
XXIII. CONVERSION OF KLAFTER OF VIENNA INTO ENGLISH FEET.
| 1 Klafter of Vienna = 6.222173 English Feet.
| Klafter of Hundreds.
Vienna. — —— — —— — — =
‘Thousands. oO. | 160. | "oO. 360. | 406. a0. GEO. | 7COO. so. | Soe.
Eng. feet| Eng. feet|Eng. feet) Eng. feet) Eng, feet}Eng. feet|/Eng. feet Eng. feet| Eng. feet Eng. feet
0 0.0| 622.2) 1244.4) 1866.7) 2488.9] 3111.1] 3733.3} 4355.5 4977.7 5600.0
1000 6222.2) 6844.4) 7466.6} 8088.8} 8711.0] 9333.3] 9955.5)10577.7|11199.9 11822.1
2000 12444.3 13066.6/13688.8 1411.0 14933.2 1°555.4|16177.6 16799-9)17422.1 18044.3
3000 18666.5/19288.7/19911.0 20533.2 21155.3 21777.6|22399.8 23022.0/23644.3 24266.5
4000 24888.7/25510.9 26133.1|26755.3' 27377.6'27999.&|28622.0 29244. 2'29866.4 30488.6
Klafter. Units.
toe (oO. Pa fo Tis Was 6 Seas
Eng. feet|/Eng. feet Erg. feet Eng. feet Eng. feetiEng. feet| Eng. feet| Eng. feei|Eng. faet| Eng. feet
0 0.00 6.22) 12.44] 18.67) 24.89] 31.11] 37.33] 43.56) 49.78] 56.00
10 62.22) 68.44) 74.67) 80.89) 87.11] 93.33) 99.55) 105.78] 112.00] 118.22
20 124.44) 130.67] 136.89] 143.11} 149.33] 155.55) 161.78] 168.00] 174.22] 180.44
30 186.67) 192.89) 199.11] 205.33] 211.55} 217.78] 224.00] 230.22) 236.44) 242.66
40 248.89} 255.11) 261.33) 267.55) 273.78] 280.00] 286.22; 292.44! 298.68] 304.89
50 ohlelsy 317.33] 323.55| 329.78] 336.00] 342.22) 348.44] 354.66) 360.89] 367.11
60 Sie -83) 379.55) 385.77) 392.00} 398.22] 404.44) 410.66] 416.89] 423.11] 429.33
70 435.55) 441.77) 448.00} 454.22) 460.44) 466.66) 472.89] 479.11) 485.33] 491.55
80 497.77 504.00) 510.22) 514.44) 522.66) 528.86) 535.11 541.33) 547.55) 553.77
90 || 560.00 566.22 572.44) 578.66) 584.88} 591.11) 597.33, 603.55 609.77] 616.00

40

XXIV. CONVERSION OF FEET OF VIENNA INTO METRES.

1 Foot of Vienna = 0 3160807 Metre.

A8T

Feet of | Hundreds.
Vienna. = — = — = — —
Thousands, | 0. | 100. 200. | 300. | 400. | 560. GOO. | 700. S60. | 900.
Metres. Metres. Metres. Metres, Merce, Metres. Metres. | Metres. | Metres. | Metres.
0 | 0.00} 31.61) 63.22) 94.82] 126.43} 158.04| 189.65) 221.26) 252.86] 284.47
1000 || 316.08] 347.69} 379.30] 410.90} 442.51] 474.12) 505.73! 537.34) 568.95} 600.55
2000 632.16] 663.77) 695.38] 726.99] 758.59) 790.20) 821.8 | 853.42) 885.03) 916.63
3000 |) 948.24) 979.85|1011.46)1043.07/1074.67]1106.28)1137. -89/1169. 50,1201.11 1232.71
4000 ‘1264.52 1295.93)1327.54)1359.15|1390.76]1422.36|1453.97|1485.58 1517.19|1548.80
5000 | 1580.40)1612.01|1643.62]1675.23)1706.84]1738.44/1770.05 1801.66 1833.27 1864.88
6000 | 1896.48/1928.09}1959.76]1991.31)/2022.92]2054.52|2086.13)2117.74 2149.35|2180.96
7000 | 2212.56)2244.17/2275.7§] 2307.39|/2339.00]2370. 61/2402. 21/2433. 82) 2465.43)2497.04
8000 |'2528.65/2560.25/2591.86|2623.47'2655. 08 2686. .69)2718.29)2749.90/2781.51)2813.12
9000 | 2844.73) 2876.33)]2907.94| 2939.55/2971.16.3002.77|/3034.37/3065.98 3097.59 3129.20]
10000 |3160.81/3192.42)3224.02)3255.64/3287.24 3318.85|3350.46/3382.06 3413.67 3445.28
11000 | 3476.89)/3508.50/3540.10)3571.71/3603.32 3634.93)3666,54 3698.14/3729.75/3761.36
12000. |3792.97/3824.58/3856.18|3887.79|3919. 40, 3951.01/5982.62)4014. 22 4045.83 4077.44
13000 | 4109.05)4140. 66/4172. 27) 4203.87)/4235.48 4267. 09]4298.70/4230.31|4361.91/4393.52)|
14000 | 4425.15/4456.74/4488.35]4519.95/4551.56 4583.17 4614.78)4646.39|/4677.99/4709.60
15000 4741.21 4772.82)/4804.43]4836.03/4867. 64, 4899.25}4930.86/4962.47/4994.08 5025.68
16000 | 5057.29/5088.90/5120.51)5152.12)5183. 72.5215. 33]5246.9415278.55 5310.16 5341.76
17000 5373.37 5404.98 9436.99\0468.20 9499.80. 5531.41/55 5563.0215594.63 5626.24 5607.54
18000 |5689.45/5721.06 9752.67 5784.28 pe es 5879.10/5910.71 5942.32 5973.93
19000 \6005.53 6037.14/ 6068.75 6700.36/6131.97,6163.57/6195.18 6226.79) 6258.40 6290.01
20000 |'6321.61)6353.22/6384.83) 6416.44 Bates (ete see 5/0511.2 aioe: 87)6574.48 6606.09
21000 | 6637.69|6669.30| 3700.91) 6732.5216764. be(OHUS sf 108 27. acne, 95) 6890.56 6922.17
22000 |/6953.78)6985.38}7016.99) 7048.60) 7080.2 21,7111.82 7143.42 7175.03) 7206.64 7238.25
23000 ||7269.86)7301.46 7333.07 7364.68 7396.29 7427.90 7459. 50, 7491.11)7522.72 "75 54.33
24000 (7585.94 7617.54|7649.15/7680.76|7712.37.7743.9§|7775.59, 7807.20|7838.80 7870.41
25000 7902.02 7933. 63|7965.23 7996.84/8028.45 8060.06/8091.67 8123.27) 8 8154.88 8186.49
26000 |/8218.10/8249.71/8281.31)/8312.92)/8344.53 8376.14/8407.75 8439.35/8471.96 8502.57
27000 | 8534.18/8565.79|8597.40 8629.00/8660.61 8692.22/8723.83 8755.44/8787.04 8818.65
28000 | 8850.25/8881.87|8913.48 | 8945.08|8976.69 9008.30)9039.91 9071.52/9103.12 9134.73
Feet of i Units.
Vienna. SSS — =
Tens. 0. 1. ze 3. 4. od. 6. 4 8. De
Metres. | Metres. | Metres. | Metres. Metros. Metros! Metres. | Metres. | Metres. | Metres.
0 || 0.00 0.32 0.63 0.95 1.26 1.58 1.90 2.21 2.53 2.84
10) || SiGe 8.48) S870) etd. | 4.434 4274.) | bl0Gy| 587. |. 5.69-|, 6.01
20 || 6.32 6.64 6.95 7.27 eae, 7.90 8.22 8.53 8.85 oalif
30 | 9.48 SESOM Oey SOLS. | OS o eel OG) ales Si la G95 L201 | er 2k35
40 12.64 | 12.96 | 13.28 | 13.59 | 13.91 | 14.22 | 14.54 | 14.86 | 15.17 | 15.49
50 15.80 | 16.12 | 16.44 | 16.75 | 17.07 | 17.38 | 17.70 | 18.02 | 18.33 | 18.65
60 18.96 | 19.28 | 19.60 | 19.91 | 20.23 | 20.55 | 20.86 | 21.18 | 21.49 | 21.81
70 2.13 | 22.44 | 22.76 | 23.07 | 23.39 | 23.71 | 24.02 | 24.34 | 24.65 | 24.97
80 25.29 | 25.60-| 25.92 | 26.23 | 26.55 | 26.87 | 27.18 | 27.50 | 27.82 | 28.13
90 || 28.45 | 28.76 | 29.08 | 29.40 | 29.71 | 30.03 | 30.34 | 30.66 | 30.98 | 31.29
E 41

488 XXV. CONVERSION OF FEET OF VIENNA INTO PARIS OR FRENCH FEET.
1 Foot of Vienna = 0.9730370 Paris Foot,
Feet of Hundreds.
Vienna.
Thousands. Oo. 160.| 200. 300. | 460.)} 500. 600. | 760. | SCO. | $60.
Paris ft.) Paris tt.| Paris ft. Paris ft-| Paris ft.] Paris ft.) Paris ft.) Paris ft.| Paris ft.| Paris ft
0 0.00} 97.30} 194.61) 291.91] 389.21] 486.52) 583.82) 681.13] 778.43] 875.73)
1000 || 973.04 1070.34 1167.64 1264.95) 1362.25]1459.56/1556.86) 1654.16)1751.47|1848.77
2000 1946.07 2043.38 2140. 68/2237.99|2335.2912432.59|2529.90/2627.20/2724.50/2821.81
3000 |/2919.11/3016.41/3113.72/3211.02/3308.33]3405.63/3502.93/3600.24/3697.54/3794. 84
4000 | 3892.15/3989.45/4086.76/4184.06/4281.36]4378.67|/4475.97|4573.2714670.58/4767.88
5000 bats 4962.49/5059.79/5157.10|5254.40]5351.70/5449.01/5546.3115643.6115740.92)
6000 |5838.22/5935.53|6032. 83/6130. 13/6227.44]6324. 74] 6422.0416519.35/6616.65|6713.96
7000 6811.26 6908.56}7005.87/7103.17/7200.47] 7297.78] 7395.08] 7492.38]7589.69|7686.99
8000 |'7784.30]7881.60/7978.90/8076.21 8173.51/8270. 81'8368.12/8465.42)|8562.73/8660.03
9000 ee ae 8951.94|9049.24/9146.55,9243.85 9341.16/9438.46)9535.76)/9633.07
10000 | 9730.37/9827.67/9924.91/10022.3/10119.6}10216.9 10314.2)10411.5/10508.8/10606.1
11000 10703.4 eae 10898.0/10995.3/11092.6 11189.911287.2 11384.5)11481.8)11579.1
12000 |/11676.4)11773.7 (ee 11968.4/12065.7;12163.0)12260.3/12357.6)12454.9/12552.2
13000 | 12649.5)1: se 2844.1/12941.4)13038. iota e: -0 13233.3/13330.6/13427.9)13525.2)
14000 |,13622.5]13719.8/13817.1)13914.4114011.714109.0 14206. 3|14803.6/14400.9/14498.3
| |
15000 ||14595.6}14692.9|14790.2)14887.5)14984.8115082.1'15179.4]15276.7/15374.0|15471.3
16000 1568.6 15665.9}15763.2)15860.5}15957.8}16055.1 /16152.4]16249.7|16347.0/16444.3
17000 (16541.6 16638.9!16736.2/16833.5)16930.8)17028.1 17125.5)17222.8)17320.1117417.4
18000 Li514.7 17612.0)17709.3 17806.6 17903. 9118001.2 18098. 5) 18195.8}18293.1|18390.4
19000 |/18487.7)18585.0/18682.3)18779.6 18876.9}18974.2 19071.5 19168.8 19266.1/19363.4
|
20000 | 19460.7}19558.0)19655.3)19752.7, 19850.0)19947.3 (20044. 6|20141.9}20239.2|20336.5
21000 | 20433.8 20531.1/20628.4 20725. 7120823. ieee io 21017. 6)21114.9/21212.2/21309.5
22000 21406.8]21504.1/21601.4/21698.7 21796.0;21893.3 21990. 6}22087.9}/22185.2|22282.5
93000 | 22379.9|22477.2/22574.5 22671, 8: 22769.1122866.4'22963.7| '23061.0 23158.3/23255.6
24000 23352.9 23450. 2/23547.5|23644. ee 1}23839.4 23936. "| 24034.0/24131.3)24228.6
|
95000 |'24325.9)24423.2/24520.5|24617.8 24715.1124812.4 24909.7/25007.1/25104.4/25201.7
2.6000 25299.0]25396.3/25493.6/25590.9 (25688.2 2'25785.5|'25882. 8 25980.1/26077.4/26174.7
27000 | 26272.0]26369.3/26466. 6/265 ee 9 Hane 201 58.5 26855.8/26953.1|27050.4/27147.7
28000 27245.0)27342.3/27439.6|27536.9 27634.3:27731.6 6 27828. 9} /27926.2 2|28023.5}28120.8
Feet of Units.
Vienna. oo
Tens. oO. 1 e SF 3. A. De 6. Wie &. 9.
Paris ft,| Paris ft.| Paris ft.| Paris ft.| Paris ft.i Paris ft.| Paris ft.| Paris ft. Paris ft.| Paris ft.
0 0.00 0.97 1.95 2.92 3.89 4.87 5.84 6.81 7.78 8.76
10 9.73 | 10:70 | 11.68 | 12565" | 13562 | 14.60") Vo 57) V6 354 7b es-49
20 19.46 | 20.43 | 21/47 | 2253851923535 | 24.33 | 25.30 |) 26227 |) 27.25) | 28822
30 29.19 | 30.16 | 31.14] 32.11 | 33.08 | 34.06 | 35.03 | 36.00 | 36.98 | 37.95
40 38.92 | 39.89. | 40.87 | 41.84 | 42.81 | 43.79 | 44.76 | 45.73 | 46.71 | 47.68
50 48.65 | 49.62 | 50.60 | 51.57 | 52.64 | 53.52 | 54.49 | 55.46 | 56.44 | 57.41
60 58.38 | 59.36 | 60.33 | 61.30 | 62.27 | 63.25 | 64.22 | 65.19 | 66.17 |) 67.14
70 68.11 | 69.09 | 70.06 | 71.03 | 72.00 | 72.98 | 73.95 | 74.92 | 75.90_|° 76.87
80 77.84 | 78.82 | 79.79 | 80.76 | 81.74 | 82.71 | 83.68 | 84.65 | 85.63 | 86.60
90 || 87.57 | 88.55 | 89.52 | 90.49 | 91.47 | 92.44 | 93.41 | 94.36 | 95.36 | 96.53 |
: Suey 42

XXXVI. CONVERSION OF FEET OF VIENNA INTO ENGLISH FEET, 489
1 Foot of Vienna = 1.037029 English Feet.

Feet of Hundreds.
Vienna. ——— - - — -
Thousands | 0. 100. 200. 300. 400. 500. 600. 700. 800. 9500.

|
|
| |

Eng. feet| Eng. feet|Eng. feet|Eng. feet/ Eng. feet] Eng. feet/ Eng. feet Eng. feet) Eng. feet|Eng. feet

0 0.00] 103.70) 207.41) 311.11) 414.81] 518.51] 622.22) 725.92| 829.62] 933.33
1000 | 1037.03)1140.73 1244.43 /1348.14)/1451.84]1555.54/1659.25 1762.95 1866.65|1970.36
2000 |/2074.06/2177.76| 2281.46 /2385.17|2488.87)2592.57 2696.28) 2799.98 2903.68 3007.38
3000 |3111.09|3246.'79 3318.49 3422. 20/3525.90]3629.60/3733.30 3837.01/3940.71|4044.41
4000 |4148.12)4251.82)4355.52/4459. 22) 4562.93]4666.63/4770.33/4874.04 4977.74|5081.44

5000 |/5185.14/5288.85 5392.55|5496.25/5599.96]5703.66|5807.36/5911.07|6014.77|6118.47
6000 ||6222.17|6325.88| 6429.58 '6533.28|6636.99]6740.69| 6844.39 6948.09/7051.80/7155.50
7000 ||7259.20/7362.91)7466.61/7570.31/7674.0117777.72| 7881.42) 7985.12) 8088. 83/8192. 53
8000 ||8296.23/8399.93)8503.64/8607.34)8711.04]8814. 75|8918.45 9022. 15/9125.86|9229.56
9000 ||9333.26/9436.96 9540.67 /9644.37/9748.07)9851.78)9955.48)10059.2)10162.9|10266.6

10000 |/10370.3)10474.0/10577.7)/10681.4/10785.1]10888.8}10992.5)11096.2/11199.9)11303.6
11000 = //11407.3)11511.0)11614.'7|11718.4)11822.1}11925.8/12029.5|12133.2)12236.9)12340.6
12000 ||12444.4)12548.1)12651.8 12755.5)12859.2}12962.9|13066.6/13170.3/13274.0|13377.7
13000 |/13481.4/13585.1/13688.8|13792.5|13896.2113999.9 14103.6)14207.3)14311.0/14414.7
14000 ||14518.4/14622.1 14725.8)14829.5/14933.2}15036.9)15140.6|15244.3/15348.0)15451.7

15000 ||15555.4)15659.1 15762.8/15866.5)15970.3]16074.0/16177.7|16281.4/ 16385.1/16488.
16000 |/16592.5)16696.2 16799.9|16903.6/17007.3]17111.0)17214.7/17318.4)17422.1)17
17000 |/17629.5|17733.2)17836.9 |}17940.6/18044.3]18148.0)18251.7/18355.4/18459.1|1
18000 |'18666.5)18770.2 18873.9|18977.6)19081.3]19185.0|19288.7/19392.4|19496.1/196
19000 |/19'703.6/19807.3)19911.0)20014. 7/20118.4}20222. 1|20325.8/20429.5|20533.2|/20636.

20000 ||20740.6|20844.3 20948.0,
_21000 //21777.6/21881.3 21985.0)
22000 |/22814.6|22918.3 23022.0
23000 |/23851.7/23955.4 24059.1
24000 ||24888.7)24992.4 25096.1

-7/21155.4]21259.1/21362.8/21466.5|21570.2/21673.9
~7|/22192.4}22296.1|22399.8}22503.5|22607.2,72710.9
8)23229 .5]23333.2/23436.9]23540. 6/23644.3|23748.0
-8)24266.5]24370.2/24473.9|24577.6|24681.3/24785.0
8|/25303.5]25407.2|25510.9|25614. 6}25718.3/25822.0

bo b bb bb
Go
—

25000 — |/25925.'7)/26029.4 26133.1/26236.8/26340.5]26444. 2/26£47.9|26651.6/26755.4 26859.1
26000 | 26962.8 27066.5 27170.2 27273.9|27377.6|2748 1.3|27585.0/27688.7|27792.4|2
27000 |]27999.8|28103.5 28207.2/28310.9|28414. 6]28518.3|28622.0|28725.7|/28829.4 28¢

28000 ||29036.8|29140.5 | 29244. 2/29347.9 29451.6129555.3|29659.0/29762.7|29866.4/29970.1
Feet of Units.
Vienna. ||- =

Tens. 0. 1. 2. 3. A. De 6. Lies §. 9.

|Eng. feet|Eng. feet Eng. feet Eng. feet) Eng. feet}Eng. feet Eng. feet Eng. feet) Eng. feet| Eng. feet
0 0.00 1.04 2.07 Sok 4.15 5.19 6.22 7.26 8.30 eae

10 10.37 | 11.41 | 12.44 | 13.48 | 14.52 | 15.56 | 16.59 | 17.63 | 18.67 | 19.70
20 20.74 | 21.78 | 22.81 | 23.85 | 24.89 | 25.93 | 26.96 | 28.00 | 29.04 | 30.07
30 31.11 | 32.15 | 33.18 | 34.22 | 35.26 | 36.30 | 37.33 | 38.37 | 39.41 | 40.44
40 41.48 | 42.52 | 43.56 | 44.59 | 45.63 | 46.67 | 47.70 | 48.74 | 49.78 | 50.81

50 51.85 | 52.89 | 53.93 | 54.96 | 56.00 | 57.04 | 58.07 | 59.11 | 60.15 | 61.18
60 62.22 | 63.26 | 64.30 | 65.33 | 66.37 | 67.41 | 68.44 | 69.48 | 70.52 | 71.56
70 72.59 | 73.63 | 74.67 | 75.70 | 76.74 | 77.78 | 78.82 | '79.85 | 80.89 | 81.93
80 82.96 | 84.00 | 85.04 | 86.07 | 87.11 | 88.15 | 89.18 | 90.22 | 91.26 | 92.30
90 93.33 | 94.37 | 95.41 | 96.44 | 97.48 | 98.52 | 99.55 (100.59 |101.63 (102.67

E 43

490
X XVII. CONVERSION OF FEET OF VIENNA INTO RHINE OR PRUSSIAN FEET.

1 Foot of Vienna = 1.007096 Rhine Feet.

Feet of Hundreds,

Vienna,

Thousands. . 100. | 200. 360. | | 400. 500. 660. %00. \ 800. | $e0.

\Rhine ft.|Rhine ft.) Rhine ft./Rhine ft. [Rhine ft, ft. {Rhine ft.| Rhine ft. Rhine ft. Rhine ft. Rhine ft.

0 ||. 0:00 100.71; 201.42) 302 13) 402.84] 503.55 604.26) 704.97) 805.68, 906.39
1000 ||1007.10}1107.81)1208.52/1309.22) 1409.93}1510.64 1611.35 1712.06 1812.72/1913.48
2000 2014.19 2114.90|2215.61)/2316.32)2417.03]2517.74 2618.45 2719.16 2819.87 2920.58)
3000 |'3021.29 3022.00 « 3222.71|3323.42/3424.13]3524.84/3625.55 3726.26 3826. 96 3927 - |
4000 ||4028.38])4129.09 | 4229 .80/4330.51/4431.22!4531.93/4632. ee siees Stee .06 4934.7
5000 |/5035.48]5136.19 5236.90|5337.61|5438.3215539.03)/5639. rN 5740.45 5841. “4 5941.S87)|
6000 | 6042.58) 6143.29 6244.00 6344.70 6445.4116546.12 6646.83 6747. 54 6848, 25 6948.96
7000 |'7049.67|7150.38)7251.09 7351.80) 7452.5117553.22)7653.93 7754.64 7855.35 7956.06)
8000 | 8056.77/8157.48 8258.19 8358.90 8459.61[8560.32 8661.03 8761.74 8862.44 8963.15
9000 | 9063.86)9164.57|9265.28|9365.99 9466. 70)9567.41/9668.12 9768.83 9869.54 9970.25

10000 | 10071.0|10171.7/10272.4|10373.1) 10473. 8|10574.5|10675.2 10775.9, 10876. ee 1.3
11000 ||11078.1|11178.8/11279.5/11380.2/11480.9}11581.6]11682.3, (11783. 0 11883.7/11984.4
12000 ||12085.2)12285.9|12286.6|12387.3/12488.0,12588.7/12689. 4 12790.1 12890. 8}12991.5

3000 | 13092.2/13193.0)13293.7|13394.4 13495.1118595.8 13696.5 13797. 2.13897. 9/13998, 5
14000 | 14099.3/14200.1/14300.8]14401.5 14502. 2}14602.9|14703.6 14804.3 ae 015005.7

15000 | 15106.4/15207.1)15307.9|15408.6 15509.3115610.0)15710.7 (15811. 4\ 15912. sia 8

a

16000 16113.5 16214.2)16315.0)16415.7 eae 4:16617.1/16717. 8 16818.5 16919.2 217019. 4

17000 ||17120.6)17221.3)17322.1)17422.8)17523.5)17624.2|1 7724.9|17825. 6 17926.3 18027.¢

18000 ||1812'7.7)18228.4/18329.1/18429. 9 185 30. : 18631.3)18732.0 18832.7 18933.4 seas
| |

19000 |/19134.8)19235.5/19336.2)19437. 019537.7119638.4 19739.1)/19839.8 19940.5 20041.2

| 3
20000 ||20141.9) 20242. 6/20343.3 caer 20645.5 20746. nes 9 20947.6)/21048.3
21000 |/21149.0)21249.7|/21350.4/21451.1)/21551.9)21652.6/ 21753. 3 21854.0 0 ‘219: 54.7) 22055.4
22000 |/22156.1/22256.8|/22357.5/22458. 2 2 22559.0:22659.7/22760.4/22861.1 2961.8 23062.5
93000 |/23163.2)23263.9|23364. 6|23465.3 23566.0;23666.8 te 5 /23868.2 23968.9 24069.6
24000 |/24170.3)24271.0)/24371.7|24472.4 24573.1)24673.9|24774.6 ‘24875. 3 24976.0 25076.7

| bee

25000 ||25177.4|25278.1/25378.8|25479. 5 25580.2 25680.9 25781.7 25882. 4 25983. 1 26083.8
26000 ||26184.5|26285.2/26385.9/26486. 6) 26587.3126688.0/26788.8 26889.5 26990.2 27090.9
97000 ||27191.6]}27292.3|27393.0 27493.7/27594.4 27695.1/27795.8 27896.6 27997. 3/28098.0
28000 ||28198.7/28299.4|28400.1 28500.8)28601.5{28702.2|28802.9 (28903.7 7 29004, 429105. ]
Feet of Units.

Vienna. — —<—— = = = —————— —————
meek 0. 1. 2. 3. A. 5. 6. %. Ss. 9.

Rhine ft.|Rhine ft.|Rhine ft.|Rhine ft.|Rhine ft.| Rhine ft.|Rhine ft.|Rhine ft.|Rhine ft. Rhine ft.
0 0.00 1.01 2.01 3.02 4.03 5.04 6.04 7.05 8.06 9.06
10 10.07 |.11.08 |. 12.09 | 13.09 | 14.10} 15.12 |) 16.11 | 17.127) 18.13 |719.138
20 90.14 |\ 20.15) ) 22.064) 23.0624 17a 25.18) | 26.18 ral 28220 ne oe 2
80) 1 30.21 |, 31.22") 32.237) 83822310 184.24 41 35.2514), 86.267) Sie 26Rlas8i27 239528
AO 40.28 | 41.29 | 42.30 |. 43.31 | 44.31 | 45.32 | 46.33 | 47.33 | 48.34 | 49.35

50 50.35 |.51.36 | 52.37 |. 53.38 | 54.38 | 55.39 | 56.40 | 57.40 | 58.41 | 59.42
60 60.43 | 61.43 | 62.44 | 63.45 | 64.45 | 65.46 | 66.47 | 67.48 | 68.48 | 69.49
70 70.50 |.'71.50 |.72.51 |. 73.52) 74.53") 75.53 1.76.54. | 977.55) ).178.55 91) 79.56
80 80.57 | 81.57 | 82.58 | 83.59 | 84.60 | 85.60 | 86.61 | 87.62 | 88.62 | 89.63
L 90 90.64 | 91.65 | 92.65 | 93.66 | 94.67 | 95.67 | 96.68 | 97.69 | 98.70 | 99.70

oo 44

491

TO CONVERT
REEL Naes.OR) PRS SlAaN FEET

INTO DIFFERENT MEASURES OF LENGTH.

XXVIII. CONVERSION OF RHINE OR PRUSSIAN FEET INTO FRENCH TOISES.
1 Rhine Foot = 0.1610301 Toise.

|

Rhine feet. Hundteds:
| i : ze
Thousands. 0. | 100. | 200. 200. 400. 300. | 600. 200. | 800. 900.

| |

| Toises. | Toises. | Toises. | Toises. | Toises. | Toises. | Toises. | Toises. | Toises. | Toises.
0 | 0.00; 16.10) 32.21) 48.31] 64.41} 80.52) 96.62) 112.72) 128.82) 144.93)
1000 =|}: 161.03) 177.13) 193.24) 209.34) 225.44) 241.55) 257.65) 273.75) 289.85) 305.96
2000 | 322.06] 338.16) 354.27) 370.37] 386.47] 402.58] 418.68) 434.78) 450.88] 466.99
3000 483.09} 499.19} 515.30) 531.40} 547.50] 563.61) 579.71) 595.81) 611.91) 628.02
4000 | 634.12] 650.22) 666.33] 692.43| 708.53] 724.64] 740.74] 756.84) 772.94] 789.05

X XIX. CONVERSION OF RHINE OR PRUSSIAN FEET INTO METRES.
1 Rhine Foot = 0.31385350 Metre.

Rhine feet. | Rhine Feet. Hundreds.

Thousands.| @, | 100. 200. 300. 400. | 500. 600. | 700. | S00. | 900.

eet

Motres. Metres | Metres | Metres. | Metres. | Metres. Metres. Metres. | Metres. | Metres.

0 0.00} 31.39) 62.77) 94.16} 125.54] 156.93) 188.51) 219.70) 251.08) 282.47
1000 313.85| 345.24) 376.62) 408.01) 439.39] 470.78) 502.17) 533.55) 564.94) 596.32)
2000 627.71] 659.09) 690.48) 721.86) 753.25] 784.63] 816.02} 847.40] 878.90] 910.18
3000 941.56) 972.95 1004.33 1035.72 1067.10 1098.49|1129.87)1161.26)1192.64)1224.03

|
4000 [1255.41 1286.80 1318.18'1349.57 1380.96]1412. 34|1443.73|1475.11/1506.50|1537.88

5000 Pret es oui aa hia eas Tho 1726.19)1757.58}1788.97)1820.35)1851.74
6000 1883.12 1914.51 1945.89/1977.28 2008. 66}2040. 05)2071.43/2102.82/2134.20)2165.59
7000 |2196.97 2228.36/2259.75|2291.13 2322. 52/2353. 90/2385. 29|2416.67|2448.06/2479.44|
8000 2510.83 2542.21 2573.60 2604. 98 2636.3712667.76|2699.14|2730.53/2761.91|2793.30
9000 ||2824.68)/2856.07|/2887.45 2918.84 2950. 2212981.61)3012.99/3044.38}3075.76 3107.15

Rhine feet. Units.
Tens. 0. 1 e aes be A. 5. 6. , S. f ; 9.
Metres. | Metres. | Metres. Metres. Metres. Mencost Metres. | Metres. Molres) Metres.
0 0.00 0.31 0.63 0.94 1.26 Me 1.88 2.20 2.51 2.82
10 3.14 3.45 ald 4.08 4.39 4.71 5.02 5.34 5.65 5.96
20 6.28 6.59 6.90 7.22 WeDo 7.85 8.16 8.47 8.79 9.10
30 9.42 9.73 | 10.04 | 10.36 | 10.67 | 10.98 | 11.30 | 11.61 | 11.93 | 12.24

40 12.55 | 12.87 | 13.18 | 13.50 | 13.81 | 14.12 | 14.44 | 14.75 | 15.06 | 15.38

50 || 15.69 | 16.01 | 16.32 | 16.63 | 16.95 | 17.26 | 17.58 | 17.89 | 18.20 | 18.52
60 || 18.83 | 19.15 | 19.46 | 19.77 | 20.09 | 20.40 | 20.71 | 21.03 | 21.34 | 21.66
70 || 21.97 | 22.28 | 22.60 | 22.91 | 23.23 | 23.54 | 23.85 | 24.17 | 24.48 | 24.79
80 || 25.10 | 25.42 | 25.74 | 26.05 | 26.36 | 26.68 | 26.99 | 27.31 | 27.62 | 27.93
90 || 28.25 | 28.56 | 28.87 | 29.19 | 29.50 } 29.82 | 30.13 | 30.44 | 30.76 | 31.07

E 45

492

XXX. CONVERSION OF RHINE OR PRUSSIAN FEET INTO FRENCH FEET AND

DECIMALS.

1 Rhine Foot = 0.96618056 French Foot.

1 Rhine Foot = 1.0297217 English Feet.

Rhine Feat: Rhine Feet. Hundreds. .
|
Thousands. @, | 100. | 200. | 300. | 400. | 500. | 600. | 760.) SOO. | 900.
rr. teet. Fr. feet. rr, teet.| Fr. feet.| Fr. feet.| Fr. feet.) Fr. feet.| Fr. feet.| Fr. feet. Fr. feet.
0 0.00} 96.62} 193.24) 289.85| 386.47] 483.09) 579.71) 676.33) 772.94) 869.56
1000 966.18 1062.80/1159.42 1256.03 1352.65)1449.27 1545.89 1642.51)1739.13|1835.74
2000 ||1932.36|2028.98 2125.60 2222.22 2318.83 2415.45|2512.07 2608.69) 2705.31/2801.92
3000 2898.54 2995.16 3091.78 3188.40 3285.01]3381.63/3478.25 3574.87 3671.49/3781.10
4000 ||3864.72/3961.34 4057.96|4154.58 4251.19]4347.81|4444.43 4541.05|4637.67|4734.28
5000 //4830.90 4927.52 5024.14 9120.76 5217.38 5313.99 5410.61 5507.23 5603.85/5700.47
6000 |/5797.08/5893.70 5990.32 6086.94 6183.56 6280.17/6376.79 6473.41) 6570.03/6666.65
7000 6763.26 6859.88) 6956.50 7053.12 7149.74 7246.35) 7342.97 7439.59 7536.21|7632.83
8000 4(29-44/7826.06)7922.68|8019-30)/8115-92 8212.53/8309.15 8405.77 8502.39/8599.01
9000 ee ee eae 9178.72 See 9468.57|9565.19

XX XI. CONVERSION OF RHINE OR PRUSSIAN FEET INTO ENGLISH FEET.

Rhine Feet. Hundreds.
Thousands. ls E eae : ae
| ©. 100. | 200. | 300. | 400. | 500. | GOO. | 700. | S60. | 3OG.
| Eng. ft. Eng. ft. Eng. ft. | Eng. ft. | Eng. ft. | Eng. ft. Eng. ft. Eng. ft. ‘Eng. ft. | Eng. ft.
0 0.00} 102.97] 205.94] 308.92) 411.89] 514.86) 617.83] 720.81] 823.78] 926.75
1000 = |/1029.72/1132.69)1235.67 1338. 64|1411.61}1544.58)1647.55|1750.53/1853.50)1956.47
2000 |/2059.44/2162.42!2265.39 |2368.36|2471.33}25 74. 30|2677.28/2780.25|2883.22/2986.19
3000 |/3089.17/3192.14/3295.11/3398.0813501.05 3604.03 3707.00 3809.97|3912.94'4015.92
4000 /4118.89|4221.86|4324.83 | 4427.80/4530. 7814633. 75|4736. 72/4839.69|4942.66|5045.64
5000 |15148.61/5251.58/5354.55/5457.53/5560.5015663.47/5766.44|5869.41/5972.39 6075.36
6000 |6178.33)/6281.30) 6384.28 6487.25|/6590.2216693.19|/6796.16]/6899.14)7002.11/7105.08
7000 — |/7208.05 7311.02/7414.00 7516.97|7619.9447722.91/7825.89|7928.86|8031.83/8134. 80
8000 [8237.77 8340.75 8443.72 8546.69/8649.66]8752. 64'8855.61/8958.58/9061.55/9164.52
9000 |9267.50 9370.47 /9473.44 9576.41/9679.3819782.36/9885.33]9988.30|10091.3/10194.2
Rhine Feet. Units.
pene Ole a lees lel eae a 6. ie a. 2 a ee ees
Eng. ft. Eng. ft. | Eng. ft | Eng. ft.| Eng ft. } Eng. ft.| Eng. ft. | Eng. ft | Eng. ft. | Eng. ft.
0 0.00 1.03 2.06 3.09 4.12 5.15 6.18 feo 8.24 9.27
10 10.30 | 11.33 | 12.36 | 13.39 | 14.42 | 15.45 | 16.48 | 17.51 | 18.53 | 19.56
20 20.59 | 21.62 | 22.65 | 23.68 | 24.71 | 25.74 | 26.77 | 27.80 | 28.83 | 29.86
30 30.89 } 31.92 | 32.95 | 33.98 | 35.01 | 36.04 | 37.07 | 38.10 | 39.13 | 40.16
40 41.19 | 42.22 | 43.25 | 44.28 | 45.31 | 46.34 | 47.37 | 48.40 | 49.43 | 50.46
50 51.49 | 52.52 | 53.55 | 54.58 | 55.60 | 56.63 | 57.66 | 58.69 | 59.72 | 60.75
60 61.78 | 62.81 | 63.84 | 64.87 | 65.90 | 66.93 | 67.96 | 68.99 | 70.02 | 71.05
70 72.08 | 73.11 | 74.14 | 75.17 | 76.20.) 77.23 | 78.26 | 79.29 | 80.32 | 81.35
80 82.38 | 83.41 | 84.44 | 85.47 | 86.50 | 87.53 | 88.56 | 89.59 | 90.62 | 91.65
90 92.67 | 93.70 | 94.73 | 95.76 | 96.79 | 97.82 | 98.85 | 99.88 |100.91 |101.94
E 46

493

XXXII. CONVERSION OF RHINE OR PRUSSIAN FEET INTO FEET OF VIENNA.
1 Rhine Foot = 0.9929536 Foot of Vienna.

Rhine feet. Hundreds.
Thousands-/ @, | 100. | 200. | 300. | 400. | 500. | 600. 700. S00. | 900.
Vien. ft.|Vien. ft. Vien. ft. Vien. ft.|Vien. ft. }Vien. ft.| Vien. ft. View! ft. Vien. ft.| Vien. ft.
0 0.00) 99.30} 198.59) 297.89} 397.18] 496.48) 595.77| 695.07| 794.36] 893.66
1000 992.95/1092.25/1191.54/1290.84)1390.14]1489.43/1588.73)1688.02)1787.32)1886.61
2000 |1985.91/2085.20|2184.50|2283.79|2383.09 }2482, 38 2581.68|2680.97 2780.27 2879.57]|
3000 |/2978.86/3078.16/3177.45|3276.75|3376.0413475.34/3574. 63|3673.93/3773.22/3872.52
4000 |/3971.81/4071.11/4170.41/4269.70)4369.00|4468.29|4567.59/4666.88/4766.18/4865.47
5000 ||4964.77/5064.06/5163.36/5262.65/5361.95 |5461.24/5560.54/5659.84/5759.13)5858.43
6000 ||5957.72/6057.02)6156.31/6255.61/6354.90|6454. 20) 6553.49/ 6652.79) 6752.08/6851.38
7000 ||6950.68)7049.97)7149.27|7248.56/7347.86 |7447.15|7546.45 7645.74|7745.04) 7844.33
8000 |/7943.63)/8042.92'8142.22)8241.51/8340.8118440.11/8539.40)8638.70/8737.99| 8837.29
9000 |/8936.58)9035.88/9135.17|9234.47|9333.76 }9433.06|9532.35/9631.65|9730.95|9830.24
Rhine feet. Cults.
vous. 0. 1. 2. 3. 4. 5. 6. %. s. | 9.
Vien. ft.|Vien. ft.|Vien ft.|Vien. ft.|Vien. ft. ]Vien. ft.|Vien. ft.| Vien. ft.| Vien. ft.| Vien. ft.
0 0.00 0.99 1.99 2.98 3.97 4.96 5.96 6.95 7.94 8.94
10 9.93 | 10.92 | 11.92 | 12.91 | 13.90 | 14.89 | 15.89 | 16.88 | 17.87 | 18.87
20 || 19.86 | 20.85 | 21.84 | 22.84 | 23.83 | 24.82 | 25.82 | 26.81 | 27.80 | 28.80
30 || 29.79 | 30.78 | 31.77 | 32.77 | 33.76 | 34.75 | 35.75 | 36.74 | 37.73 | 38.73
40 | 39.72 | 40.71 | 41.70 | 42.70 | 43.69 | 44.68 | 45.68 | 46.67 | 47.66 | 48.65
50 49.65 | 50.64 | 51.63 | 52.63 | 53.62 | 54.61 | 55.61 | 56.60 | 57.59 | 58.58
60 59°98 | 60557 | 61.56 | 62.56 | 63.55 | 64.54 | 65.53 | 66.53 | 67-52 | 68.51
70 69.51 | 70.50 | 71.49 | 72.49 | 73.48 | 74.47 | ‘75.46 | ‘76.46 | 77.45 | 78.44
80 79.44 | 80.43 | 81.42 | 82.42 | 83.41 | 84.40 | 85.39 | 86.39 | 87.38 | 88.37
90 89.37 | 90.36 | 91.385 | 92.34 | 93.34 | 94.33 | 95.32 | 96.32 | 97.31 | 98.30
XX XIII. cONVERSION OF BAVARIAN FEET INTO METRES.
1 Bavarian Foot = 0.2918592 Metre.
Bavarian Hundreds.
Feet. at = = —————
Thousands.) @, | 100.| 200. | 300. | 400. | 500. | 600. 700. S00. 900.
Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. Metres: | Metres: |
0 0.00} 29.19} 58.37) 87.56) 116.74] 145.93) 175.12) 204.30 262.67)|
1000 291.86) 321.05} 350.23] 379.42} 408.60] 437.79] 466.97) 496.16) 525.35) 554.53)!
2000 583.72) 612.90) 642.09) 671.28] 700.46] 729.65 758.83} 788.02 846.39)
3000 875.58) 904.76} 933.95] 963.14! 992.32]1021.51|1050.69 1079.88)1109. 06 1138.25
4000 |/1167.44)1196.62)1225.81/1254.99/1284.18]1313.37)/1342.55 1371.74 1400.92) 1430.11
5000 ||1459.30)1488.48)1517.67 1546.85 1576.04}1605.23 1634.41 1663.60 1692.78 1721.97
6000 ||1751.16/1780.34/ 1809.53)1838.71|1867.90]1897.08 Beene ao. 64 2013.83
7000 = ||2043.01/2072.20/2101.39|2130.57|2159.'76]2188.94/2218. 13/2247 .32)2276. -50)2305.69
8000 ||2334.8'7\2364.06)2393.25/2422.43/2451.6212480.80/2509.99)/2539. 17 2568. 36 2597.55
9000 ||2626.73/2655.92 2685.10|2714.29 2743.48 12772. 66/2801.85/2831. | 2860. ee |
E 47

494

THE OLD SPANISH, MEXICAN, AND BOLIVIAN

TO CONVERT

VARAS AND FEET.

INTO DIFFERENT MEASURES OF LENGTH.

XXXIV. CONVERSION OF SPANISH VARAS INTO METRES.
1 Spanish Vara = 0.8359050 Metre.

| Spanish | Hundreds.
| Varas. |
| ———— = == = ————— =H}
| Thousands | o. 160. | 200. | 800. | 400. 500. 600. 760. SOO. 990.
| } ' on (
| Metres. | Metres. | Metres. | Metres. Metres. | Metres. | Metres. | Metres. | Metres. | Metres.
| 0 0.00, 83.59) 167.18) 250.77! 334.36] 417.95) 501.54) 585.13) 668.72! 752.31
| 1000 | 835.90) 919.50 1003.09|1086.68 1170.27 }1253.86 1337.45) 1421.04 1504.63 1588.22
| 2000 }1671.81 1755.40, 1838.99|1922.58 (2006. 17 2089.76 2173.35 2256, 94 2340.53 2424.19
3000 |'2507.71 2591.31|2674.90/2758. 49: 2842.08 |2925.67/3009.26/3092.85 3176.44 3260.03
| 4000 eer ee - 62, 3427.21/3510.80)3594.39 fe 9813761.57/3845.16 3928.75/4012.34 4095.93
|
5000 4179.52 42 3.12 4346.71 4430.30 4513.89 ]4597.48/4681.07/4764. 66 4848. Bs .84
| 6000 | 5015.43 5099.02 5182.61/5266.20/5349.79 [5433.38)5516.97 5600.56 /5684.15 5 5767.74
| 7000 | 5851.33'5934.93 6018.52/6102.11 | 6185.70|6269.29 6352.88 6436.47 6520.06 6603.65
| 8000 |'6687.24'6770.83'6854.42 6938.01 7021.60 7105.19) 7188.78 7272.37, 7355.96, 7439.55
| 9000 |'7523.14 7606.74, 7690.33]7773.92| 7857.51 |7941.10 S024. 69 8108.28 8191.87 8275.46
| | | |
| XXXV. CONVERSION OF SPANISH FEET INTO METRES.
1 Spanish Foot = 0.2786350 Metre.
Spanish Hundreds.
Feet. iS 2 ee ra rt
| Ss eT ean es Sar
Thousands. @, 160, 200, 300. 460. | 500. 600. 700. S6o. SCO.
| | ‘ |
| Metres | Metres. | Metres. | Metres. | Metres. | Metres. | Metres. Metres. | Metres. | Metres.
On| 0.00, 27.8 fs 55.73] 83.59] 111.45] 139.32) 167.18) 195.04) 222.91) 250.77
| 1000 278. 63) oot 334.36) 362.23) 390.09] 417.95) 445.82) 473.68) 501.54) 529.41
| 2000 557 27 585 ae 613.00 oe 668.72] 696.59| 724.45) 752.31) 780.18} 808.04
| 3000 | 835. 90, 863.77; 891.63) 919.50) 947.36] 975.22)1003.09)1030.95'1058.81)1086.68
| 4000 | 1114.54 1142.40:1170.27 (1198.13 1226.00]1253 86/1281.72/1309.58)1337.45)1365.31
| | |
i} 5000 / 1393. Ug a2. 04 1448.90 (1476. a i 504.63]1532.49 1560.36)1588.22 1616.08 1643.95
| 6000 | 1671. 81/1699. 67) 11727. 54| 1755.40 1783.26]1811.13' 1839.00 1866.85 1894. 72)1922.58
7000 || 1950. 44.1978.31 2006.17 2034.04 2061.90 2089.75|2117.63 2145.49 2173.35 2201.22)
8000 ees -08 2256.94 2284.81) (2312.67 2340.53 2368.40) 2396.26|/ 2424.12 (2451. 99 | 2479.85
9000 | 2507. 71| 2535. 58 25 563,44 2591.31 2619.17 ]2647.03) 2674.90) 2702. 762730. 62)2758.49
| |

48

XXXVI. CONVERSION OF MEXICAN VARAS INTO METRES. 495
1 Mexican Vara = 0,838 Metre,
Mexican Hundreds.

Varas. —— == — a —
Thousands.| O, | 100. 200. | 300. | 400. | 500. 600. | 700. | S60. | 900.
ere retrace Metres. Metres. Metres. Metres. Metres, Meiee | Metres. Menon!
0 0.0; 83.8] 167.6] 251.4) 335.2] 419.0} 502.8} 586.6) 670.4) 754.2)
1000 838.0) 921.8) 1005.6] 1089.4) 1173.2) 1257.0) 1340.8) 1424.6) 1508.4! 1592.2)
2000 1676.0) 1759.8| 1843.6) 1927.4) 2011.2] 2095.0) 2178.8) 2262.6] 2346.4! 2430.2)
3000 9514.0| 2597.8! 2681.6) 2765.4) 2849.2) 2933.0} 3016.8) 3100.6) 3184.4) 3268.2)
4000 3352.0} 3435.8! 3519.6] 3603.4] 3687.2] 3771.0} 3854.8) 3938.6) 4022.4) 4106.2)
5000 4190.0) 4273.8] 4357.6] 4441.4) 4525.2) 4609.0) 4692.8) 4776.6) 4860.4; 4944.2
6000 5028.0) 5111.8) 5195.6] 5279.4) 5363.2] 5447.0) 5530.8) 5614.6; 5698.4) 5782.2
7000 5866.0} 5949.8] 6033.6] 6117.4] 6201.2] 6285.0) 6368.8) 6452.6) 6536.4) 6620.2)
8000 6704.0) 6787.8] 6871.6] 6955.4) 7039.2] 7123.0) 7206.8] 7290.6, 7374.4) 7458.2
9000 7542.0) 7625.8} 7709.6] 7793.4] 7877.2} 7961.0] 8044.8) 8128.6 8212.4 8296.2)

XXXVII. CONVERSION OF MEXICAN FEET INTO METRES.
1] Mexican Foot = 0.2793333 Metre.
Mexican Hundreds.

Feet. = — = = = —————————
Thousands.| @, | 100. 200. 300. | 400. | 500. 600. 700. | S09. 900.
Metres. | Metres. | Metres. “Metres. Metres. | Metres. Metres. Metres. iMcncs Moles
0 0.00} 27.93) 55.87) 83.80] 111.73] 139.67] 167.60} 195.53] 223.47| 251.40!
1000 279.33 307.27| 335.20) 363.13] 391.07] 419.00] 446.93} 474.87] 502.80! 530.73)
2000 558.67| 586.60) 614.53) 642.46] 670.40) 698.33] 726.27) 754.20) 782.13} 810.07
3000 838.00} 865.93) 893.87) 921.80) 949.73! 977.67)1005.60)1033.53)1061.47) 1089.46)
4000 |}1117.33)1145.27/1173.20 1201.13)1229.07]1257.00/1284.93)1312.87|1340.80/1368.73)
5000 |/1396.67|1424.60 1452.53 1480.47|1508.40)1536.33)1564.27|1592.20/1620.13) 1448.07
6000 |/1676.00 1703.93 1731.87 1759.80 1787.73}1815.67|1843.60]1871.53}1899.47 1927.40,
7000 |/1955.33]1983.27| 2011.20 2039.13]2067.07)2095.00)2122.93/2150.87/2178.80\2206.73
8000 |/2234. 67/2262. 60) 2290.53 2318.47|2346.40)2374. 33}2402. 27) 2430.20 2458.13|2486.07
9000 2514.00 2541.93 2569.87 2597.80 2625.73}2653.67|2681.60)2709.53|2737.47|2765.40,

XXXVIII. CONVERSION OF MEXICAN FEET INTO ENGLISH FEET.

1 Mexican Foot = 0.91646447 English Foot.

Mexican Hundreds.
Feet. = — — es
poem eeds @ | 100. | 200. | 300. | 400. | 500. 600. | 700. | SO. | 900. |
Eng. 228 Eng. feet| Eng. feet] Eng. feet Eng. feet}Eng. feet Eng, feet Eng. feet Eng, feet Eng. feet)!
0 0.00) 91.65) 183.29] 274.94! 366.59 458,25, pee) 641.53) 733.17} 824.82)
1000 916.46]1068.81\1099.76 1191.40}1283.05 1374. 70)1466.34 1557.99 1649.64)1741.28
2000 ||1832.93 1924.58 2016.22 2107.87 2199.51]2291.16 2382.81 2474.45 2566.10|2657.75||
3000 ||2749.39/2841.04/2932. 69) 3024.33}3115.98 3207.63 3299.27 3390.92 3482.56 3574.211|
4000 ||3665.86|3757.50)3849.15|3940.80|4032. 44141 24.09 ae oe 4490.68)!
5000 ||4582.32|4673.97/4765.62)4857.26|4948.9115040.16 5132.20 529,85 5315.49 5407.14
6000 |\5498.79|5590.43/5682.08 5773. 73/5865.3715957.02 6048.67 6140.31 6231.96 6323.60,
7000 ||6415.25|6506.90) 6598.54! 6690.19/6781.8416873.48 6965.13 7056.78 7148.42 7240.07
8000 |/7331.72|7423.36 7515.01|7606.66]7698.30]7789.95 7881.59 7973.24 8064.89|8156.53)
9000 ||8248.18|8339.83)8431.47|8523.12)8614.77|8706.41 8798.06 8889.71 8981.35/9073.00
E 49

|

XX XIX. CONVERSION OF BOLIVIAN, CHILIAN, AND PERUVIAN VABAS INTO METRES.

496

1 Bolivian, Chilian, and Peruvian Vara = 0.8474576 Metre.

Bolivian Hundreds.
Varas. =

Thousands.| ©. | 100. | 200. | 360. | 400. | 500. | GOO. | 760. | SOO. | 900.

t laretree: Metres. “Metres. Metres. | Metres. | Metres. | Metres. | Metres. | Metres. | Metres.
0 0.00} 84.75} 169.49 254.24, 338.98] 423.73) 508.47) 593.22) 677.97) 762.71
1000 847.46) 932.20/1016.95 1101.69 1186.44]1271.19|1355.93 1440.68/1525.42|1610.17)|
2000 (1694.92/1779.66)1864.41 1949.15 2033.90]2118. 64/2203.39/2288.14|2372.88/2457.63
3000 ||2542.37|2627.12/2711.86 2796.61 2881.36 2966.10/3050.85 /3135.59/3220.34|3305.08
4000 |\3389.83/3474.58|/3559.32 et 3813.56|/3898.30/3983.05|4067.80/4152.54
5000 ||4237.29|4322.03 4406.78 4491.53 4576.2714661.02/4745.76 4820.51/4915.25|5000.00)|
6000 |5084.75/5169.49/5254.24 5338.98 5423.73 5508.47|5593.22/5677.97|5762.71|5847.46
7000 | 5932.20/6016.95|6101.69 6186.44 6271.19]6355.93|6440.68 6525.42|6610.17|6694.92
8000 6779.66 6864.41 6949.15 7038.90 7118. 64]7203.39/7288.14 7372.88|7457.63/7542.37
9000 7627.12 7711.86|7796.61) 7881.36 7966. 10,8050. 85|8135.59|8220.34/8305.08|8389.83

XL. CONVERSION OF BOLIVIAN, CHILIAN, AND PERUVIAN FEET INTO METRES.

1 Bolivian Foot = 0,28248587 Metre.

FEET.
1 Bolivian Foot = 0.9268078 English Foot.

Bolivian | Hundreds.
Feet. ————— - = == : =
Thousands.| © | 100. | 200. 300. | 400. | 500. | 600. | 700. | S80. | 900.
| Metres. | Metres. Metres. “Metres. Metres. | Metres. | Metres. Metres. Metres. | Metres.
Os 0.00; 28.25) 56.50) 84.75) 112.99} 141.24) 169.49) 197.74) 225.99 254.24)
1000 282.49) 310.73) 338.98) 367.23] 395.48] 423.73] 451.98] 480.23) 508.47| 536.72
2000 || 564.97] 593.22) 621.47| 649.72) 677.97] 706.21) 734.46] 762.71} 790.96) 819.21
3000 || 847.46) 875.71) 903.95) 932.20] 960.45] 988.'70]/1016.95|1045.20|1073.45/1101.69
4000 |1129.94/1158.19 1186.44)1214.69|1242.94]1271.19|1299.44|1327. 68|1355.93)1384.18
5000 ||1412.43/1440.68 1468.93)1497.18)1525.4211553.67/1581.92/1610.17/1638.42 1666.67
6000 |1694.92 1723.16 1751.41/1779.66|1807.9111836.16|1864.41|1892.66)1920.90) 1949.15
7000 1977.40 2005.65 2033.90 2062.15 2090.4012118.64)/2146.89]2175.14/2203.39 2231.64
8000 | 2259.89 /2288. 14 2316.38)2344. 63 2372.88]2401.13)2429.38/2457.63/2485.88/2514.12
9000 |2542.37/2570.62 2598.87|2627.12/2655.37|2683. 62|2711.86|2740.11/2768.36|/2796.61
XLI. CONVERSION OF BOLIVIAN, CHILIAN, AND PERUVIAN FEET INTO ENGLISH

=
Bolivian Hundreds.
Feet. = a ee —
Thousands 0. | 100. | 200. | 300. | 400. | 500. 600. FOO. SOO. SOO.
Eng. feet Eng. feet|/Enug. feet Eng. feet Eng. feet|Eng. feet Eng. feet|Eng. feet Eng. feet Eng. feet
0 0.00} 92.68] 185.36) 278.04) 370.72] 463.40) 556.08 648.77, 741.45) 834.13
1000 926.81/1019.49 1112.17/1204.85}1297.53]1390.21| 1482.89 1575.57 1668.25 1760.93
2000 1853. 62/1946.30)2038.98)2131.66 2224.34]2317.02 2409.70 2502.38 2595.06 2687.74
3000 ||2780.42 2875.10 2965.78 3058.47/3151.15]3243.83/ 3336.51 3429.19 3521.87 3614.55
4000 3707.23|3799.91 3892.59 3985.27|4077.95]4170. 64 4263.32/4356.00 4448. 68/4541.36
5000 4634.04 4726.72/4819.40 4912.08 5004.76]5097.44 5190.12 5282.80 5375.49|/5468.17
6000 5560.85 5653.53 5746.21 5838.89/5931.57|6024.25 6116.93 6209.61 6302.29 6394.97
7000 6487.65 6580.34 6673.02 6765.70/6858.38]6951.06 7043.74 eee 7321.78
8000 |/7414.46 7507.14 7599.82|7692.50,7785.1917877.87 7970.55 OOo 2a a tooe 8248.59
| 9000 ||8341.27 8433.95 8526.63/8619.31|8711.99]8804. 67 8897.35|8990.04 9082.72|9175.40
K 50

497

TO CONVERT
FRACTIONAL PARTS OF A TOISE AND OF A FOOT

INTO EACH OTHER.

XLII. CONVERSION OF INCHES INTO DUODECIMAL LINES.

1 Inch = 12 Lines.

| Inches. Units.
Inches.
Tens.
0. 1. 2. 3. 4. 3. 6. Ve 8. 9.
Lines. Lines. Lines. Hines Lines ‘ Lines Lines. Lines. linea Tighe: |
0 0 12 24 36 48 60 aa 84 96 108
10 120 132 144 156 168 180 192 204 216 225
20 240 252 264 276 288 300 312 324 336 348
30 30) 372 384 396 408 420 432 444 456 468
40 480 492 504 516 528 540 552 564 576 588
50 600 612 624 636 648 660 672 684 696 708
60 720 732 TA4 756 768 780 792 804 816 828
70 840 852 864 876 888 900 912 924 936 948
80 960 972 984 996 1008 1020 1032 1044 1056 1068
90 1080 1092 1104 1116 1128 1140 1152 1164 1176 1188
100 1200 1212 1224 1236 1248 1260 1272 1284 1296 1305
XLIII, CONVERSION OF DECIMALS OF A TOISE INTO FEET AND INCHES.
1 Toise = 6 Feet = 72 Inches = 864 Lines.
Hundredths of a Toise.
Toisex.
ra 0. 1. 2. 3. 4. 5. 6. ”%. <i | eS
ift in. lin. |ft.in. lin |ft.in. lin |ft.in. lin. /ft. in lin. |ft.in. lin. /ft. Sits tne ft.in. lin. /ft. in. tin |ft. hil lin |
0.0 ||0.0.0,00 0. 0. 8,64/0. 1. 5,28/0. 2. 1,92)0. 2.10,56]0. 3.7,200. 4. 3,84|0.5. 0,48|0. 5. 9,12/0. 6. 5,76'|
0.1 ||0.7.2,40,0. 7.11,04/0. 8. 7,68)0. 9. 4,32/0.10. 0,96]0.10.9,60,0.11. 6,24)1.0. 2,88/1. 0.11,52/1. 1. 8,16
| 0.2 ||1-2.4,80)1. 3. 1,44/1. 3.10,08|1. 4. 6,72/1. 5. 3,36]1. 6.0,00)1. 6. 8,641.7. 5,28}1. 8. 1,921. 8.10,56
0.3 ||1.9.7,20,1.10. 3,841.11. 0,48/1.11. 9,12)2. 0. 5,76]2. 1.2,40,2. 1.11,04/2.2. 7,68/2. 3. 4,32/2. 4. 0,96
0.4 ||2.4.9,60/2. 5. 6,24/2. 6. 2,88/2. 6.11,52)2. 7. 8,16]2. 8.4,80/2. 9. 1,44/2.9.10,08|2.10. 6,72/2.11. 3,36 |
4 0.5 3.0.0,00)3. 0. 8,64/3. 1. 5,283. 2. 1,92/3. 2.10,56]3. 3.7,20|3. 4. 3,84/3.5. 0,48 3. 5. 9,12/3. 6. 5,76!|
| 0.6 ||3.7.2,40.3. 7.11,04/3. 8. 7,68|3. 9. 4,32/3.10. 0,96}3.10.9,60/3.11. 6,24/4.0. 2,88 4. 0.11,52|4. 1. 8,16
| 0.7 |\4.2.4,80.4. 3. 1,444. 3.10,08/4. 4. 6,72\4. 5. 3,36]/4. 6.0,00 4. 6. 8,64/4.7. 5,28/4. 8. vee 8.10,56
;; 0.8 4.9.7,20 4.10. 3,84/4.11. 0,48/4.11. 9,125. 0. 5,76/5. 1.2,40/5. 1.11,045.2. 7,68 5. 3. 4,325. 4. 0,96 |
5.4.9,60 5. 5. 6,24/5. 6. 2,88 5. 6.11,52'5. 7. 8,16]5. 8.4,80)5. 9. 1,44 5.9.10,08 5.10. 6,72 5.11. 3,36

51

498
XLIV. CONVERSION OF DECIMALS OF A FOOT INTO INCHES AND DECIMALS.

Hundredths of a Foot.

Feet. SS
Tenths. 0. 1. ps de 4. De 6. ide &. 9.
Inches. | Inches. | Inches | Inches. | Inches { Inches. | Inches. | Inches. | Inches | Inches.
0.0 0.00 0.12 0.24 0.36 0.48 0.60 0.72 0.84 0.96 1.08
0.1 1.20 1.32 1.44 1.56 1.68 1.80 1.92 2.04 2.16 2.28
0.2 2.40 2.52 2.64 2.76 2.88 3.00 3.12 3.24 3.36 3.48
0.3 3.60 3.72 3.84 3-96 4.08 4.20 4.32 4.44 4.56 4.68
0.4 4.80 4.92 5.04 5.16 5.28 5.40 5.52 5.64 5.76 5.88
0.5 6.00 6.12 6.24 6.36 6.48 6.60 6.72 6.84 6.96 7.08
0.6 7.20 7.32 7.44 7.56 7.68 7.80 7.92 8.04 8.16 8.28
0.7 8.40 8.52 8.64 8.76 8.88 9.00 9.12 9.24 9.36 9.48
0.8 |} 9.60 9.72 9.84 9.96 | 10.08 10.20 | 10.32 | 10.44 | 10.56 | 10.68
0.9 10.80 | 10.92 | 11.04 | 11.16 | 11.28 11.40 | 11.52 | 11.64 | 11.76 | 11.88

XLV. CONVERSION OF DECIMALS OF A FOOT INTO INCHES AND DUODECIMAL LINES.

IE ee ee ee Se ee ee > ee ee eS
Tenths. | 0. | i. 2. Be 4. De 6. ace 8. 9.

In. Line. In. Line. |In. Line. |In. Line./In. Line.]Inm Line In. Line./In. Line. In. Line In. Line.

0.0 || 0.0,00 0. 1,44] 0. 2,88] 0. 4,32) 0. 5,76] 0.7,20| 0. 8,64] 0.10,08| 0.11,52] 1. 0,96
0.1 1.2,10 1. 3,84| 1. 5,28] 1. 6,72| 1. 8,16] 1.9,60| 1.11,04/ 2. 0,48] 2. 1,92! 2. 3,36
0.2 || 2.4,80 2. 6,24] 2. 7,68] 2. 9,12] 2.10,56] 3.0,00] 3. 1,44] 3. 2,88, 3. 4,32| 3. 5,76
0.3 || 3.7,20 3. 8,64] 3.10,08| 3.11,52| 4. 0,96] 4.2,40| 4. 3,84) 4. 5,28] 4. 6,72! 4. 8,16
0.4 || 49,60, 4.11,04] 5. 0,48] 5. 1,92) 5. 3,36] 5.4,80| 5. 6,24) 5. 7,68| 5. 9,12| 5.10,56

0.5 .| 6.0,00' 6. 1,44] 6. 2,88] 6. 4,32] 6. 5,76] 6.7,20| 6. 8,64) 6.10,08| 6.11,52| 7. 0,96
0.6 | 7-2,40 7. 3,84] 7. 5,28| 7. 6,72] 7. 8,16] 7.9,60| 7.11,04| 8. 0,48] 8. 1,92] 8. 3,36
0.7 || 8.4,80 8. 6,24] 8. 7,68] 8. 9,12] 8.10,56] 9.0,00| 9. 1,44) 9. 2,88] 9. 4,32] 9. 5,76
0.8 || 9.7,20 9. 8,64] 9.10,08] 9.11,52 10. 0,96]10.2,40 10. 3,84 10. 5,28 10. 6.72/10. 8,16

10-9,60 10.11,04|11. 0,48]11. 1,92.11. 3,36]11.4,80 11. 6,2411. 7,68 11. 9,12/11.10,56

XLVI. CONVERSION OF INCHES AND DUODECIMAL LINES INTO DECIMALS OF A FOOT.
1 Inch = 0 088383 of a Foot. 1 Line = 0.006944 of a Foot.

Lines.

| ;

| Hagirelthe ofa For
|

|

|

|

0. 1. 2. 5 4. a 6. 7 8. 9. | 10. | 11.

Foot. Foot. Foot Foot. Foot. Foot. Foot. Foot. Foot Foot. Foot Foot.
0 0.0000/ 0.0069 0.0139) 0.0208 | 0.0278 | 0.0347] 0.0417 | 0.0486 | 0.0556 | 0.0625/0.0694/0.0764
1 0.0333/0.0903 0.0972 | 0.1042 0.1111)0.1181}0.1250) 0.1319 0.1389) 0.1458) 0.1528 0.1597|
2 0.1667| 0.1736 | 0.1806 0.1875 0.1944|0.2014 0.2083 | 0.2153 | 0.2222 0.2292 0.2361 |0.2431
3 0.2500 0.2569 0.2639 0.2708 |0.2778|0.2847] 0.2917 | 0.2986) 0.3056|0.3125/0.3194|0.3264
4 0.3533) 0.3 103)| 0.3472) 0.3542 |0.3611|0.3681]0.3750 | 0.3819 0.3889) 0.3958|0.4028 |0.4097
5 0.4167} 0.4236) 0.4306 0.4375 |0.4444/0.4514] 0.4583 0.4653 0.4722) 0.4792|0.4861/0.4931

6 ||0.5000/ 0.5069 0.5139} 0.5208 0.5278 | 0.5347] 0.5417 0.5486 0.5556 | 0.5625) 0.5694/0.5764
7 = |}0.5833 0.5903 0.5972 0.6042 /0.6111)|0.6181}0.6250) 0.6319 0.6389 | 0.6458 | 0.6528 |0.6597
8 ||0.6667|0.6736 0.6806| 0.6875 0.6944| 0.7014]0.7083 0.7153 0.7222) 0.7292/0.7361|0.7431
9 |'0.7500/ 0.7569 0.7639 0.7708 0.7778 | 0.7847] 0.7917 |0.7986 0.8056 0.8125 |0.8194|0.8264
10 |/0.8333/0.8403 0.8472 | 0.8542 /0.8611)|0.8681]0.8750 0.8819 0.8889 0.8958) 0.9028 /0.9097
11 |/0.9167|0.9236 0.9306 |0.9375 | 0.94.44|0.9514]0.9583/0.9653 0.9722) 0.9792|0.9861 |0.9931

499

TABLE FOR COMPARING THE MOST IMPORTANT MEASURES OF LENGTH,

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TABLES FOR THE CONVERSION OF ENGLISH FATHOMS INTO METRES.

500

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54

501

6) TABLES

FOR

COMPARING THE MOST IMPORTANT MEASURES OF GEOGRAPHICAL DISTANCES.

f
7
:
Soa’

a) 8 ty}
. o A ct rai A 1
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503

CONTENTS.

(The figures refer to the folio at the bottom of the page.)

TABLES FOR COMPARING THE MOST IMPORTANT MEASURES OF GEOGRAPHICAL

DISTANCES.
Conversion of the different Itinerary Measures into each other.

Taste I. Conversion of Kilometres into Austrian Miles—Prussian Miles—
German Miles—Nautical Leagues—French Leagues—Geographi-
cal Miles —English Statute Miles—Russian Wersts : :

« TI. Conversion of Austrian Miles into Kilometres—Prussian Miles—
German Miles—Nautical Leagues—French Leagues—Geogra-
phical Miles—English Statute Miles—Russian Wersts : :

«© JJ. Conversion of Prussian Miles into Kilometres—Austrian Miles—
German Miles—Nautical Leagues—French Leagues—Geographi-
cal Miles—English Statute Miles—Russian Wersts ‘

«© TV. Conversion of German Miles into Kilometres—Austrian Miles—
Prussian Miles—Nautical Leagues—French Leagues—Geogra-
phical Miles—English Statute Miles—Russian Wersts ; ‘

«~~ -V. Conversion of Nautical Leagues into Kilometres—Austrian Miles
_— Prussian Miles—German Miles—French Leagues—Geographi-
cal Miles—English Statute Miles—Russian Wersts . : 7

« VI. Conversion of French Leagues into Kilometres—Austrian Miles—
Prussian Miles—German Miles—Nautical Leagues—Geographi-
cal Miles—English Statute Miles—Russian Wersts . ‘ :

«© VII. Conversion of Geographical Miles into Kilometres—Austrian Miles
_-Prussian Miles—German Miles—Nautical Leagues—French
Leagues—English Statute Miles—Russian Wersts : : :

‘VIII. Conversion of English Statute Miles into Kilometres— Austrian
Miles — Prussian Miles—German Miles—Nautical Leagues—
French Leagues—Geographical Miles—Russian Wersts_ . ,

«© JX. Conversion of Russian Wersts into Kilometres—Austrian Miles—
Prussian Miles ——German Miles—Nautical Leagues — French
Leagues—Geographical Miles—English Statute Miles Z

“© X. Table for comparing the most important Itinerary Measures :

E 57

PAGE

65

68

al

74

a

80

83
86

eee

iy j
;
.
;
:
R
x “
- Walt UP hed
‘
i cH
X °
ows - f
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. -

i,

KILOMETRES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE. 505

Kilo-

metres.

1,000
2,000
3,000
4,000
5,000

6,000
7,000
8,000
9,000
10,000

100
200
300
400
500

600
700
800
900
1000

oOo FWD

Oo oO =I o&

11
12
13
14
15

16
17
18
19
20

Austrian
Miles.

131.82
263.65
395.47
527.29
659.11

790.94
922.76
1054.58
1186.41
1318.23

13.18
26.36
39.55
52.73
65.91

79.09
92.28
105.46
118.64
131.82

0.13
0.26
0.40
0.53
0.66

0.79
0.92
1.06
1.19
1.32

1.45
1.58
1.71
1.85
1.98

2.11
2.24
2.37
2.50
2.64

Prussian
Miles.

132.76
265.52
398.27
531.03
663.79

796.55
929.31
1062.07
1194.82
1327.58

13.28
26.55
39.83
53.10
66.38

79.65
92.93
106.21
119.48
132.76

0.13
0.27
0.40
0.53
0.66

0.80
0.93
1.06
eG
1.33

1.46
1.59
1.73
1.86
1.99

2.12
2.26
2.39
2.52
2.66

German | Nautical French |Geograpl’l) pogiish Es
Miles. Leagues. | Leagues. oo veo Statute Bassin
15=1° Eq. | 20=1° Eq. | 25=1° Eq. 60=1° bq. Miles. Bae
134.76 179.68 224.60 539.05 621.38 937.40
269.53 359.37 449.21 | 1078.10 | 1242.77 | 1874.80
404.29 539.05 673.81 | 1617.16 | 1864.15 | 2812.20
539.05 718.74 898.42 | 2156.21 | 2485.53 | 3749.60
673.81 898.42 | 1123.02 | 2695.26 | 3106.91 | 4687.00
808.58 | 1078.10 | 1347.63 | 3234.31 | 3728.30 | 5624.40
943.34 | 1257.79 | 1572.23 | 3773.36 | 4349.68 | 6561.80
1078.10 | 1437.47 | 1796.84 | 4312.41 | 4971.06 | 7499.20
1212.87 | 1617.16 | 2021.44 | 4851.46 | 5592.44 | 8436.60
1347.63 | 1796.84 | 2246.05 | 5390.52 | 6213.82 | 9374.00
13.48 17.97 22.46 oeeoil 62.14 93.74
26.95 35.94 44.92 107.81 124.28 187.48
40.43 53.91 67.38 161.72 186.42 281.22
53.91 71.87 89.84 215.62 248.55 374.96
67.38 89.84 112.30 269.53 310.69 468.70
80.86 107.81 134.76 323.43 372.83 562.44
94.33 125.78 157.22 377.34 434.97 656.18
107.81 143.75 179.68 431.24 497.11 749.92
121.29 161.72 202.14 485.15 559.24 843.66
134.76 179.68 224.60 539.05 621.38 937.40
0.13 0.18 0.22 0.54 0.62 0.94
0.27 0.36 0.45 1.08 1.24 S87
0.40 0.54 0.67 1.62 1.86 2.81
0.54 0.72 0.90 2.16 2.49 3015
0.67 0.90 1.12 2.70 3.11 4.69
0.81 1.08 1.35 3.23 3.13 5.62
0.94 1.26 Dy ii Sale| 4.35 6.56
1.08 1.44 1.80 4.31 4.97 UD
1.21 1.62 2.02 4.85 5.59 8.44
30 1.80 2.25 5.39 6.21 Ora
1.48 1.98 2.47 5.93 6.84 10.31
1.62 2.16 2.70 6.47 7.46 11.25
7S 2.34 2.92 7.01 8.08 12.19
1.89 2.52 3.14 heoD 8.70 13.12
2.02 2.70 3.01 8.09 9.32 14.06
2.16 2.87 3.60 8.62 9.94 15.00
2.29 3.05 3.82 9.16 10.56 15.94
2.43 3.23 4.04 9.70 11.18 16.87
2.56 3.41 4.27 10.24 11.81 17.81
2.70 Sei) | 4.49 | 10.78 12.43 18.75

|

506 KILOMETRES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

Kilo- Austrian | Prussian Gaauee re eee a English Russian
metres. Miles. Miles. 15=1° Eq. | 20=1° Eq. | 25=1° Eq. bose tee Miles: Wersts.
21 2.77 2.79 2.83 3.77 4.72 11.32 13.05 19.69
22 2.90 2.92 2.96 3.95 4.94 11.86 13.67 20.62
23 3.03 3.05 3.10 4.13 5.17 12.40 14,29 21.56
24 3.16 3:19, 3.23 4.31 5.39 12.94 14.91 22.50
25 3.30 3.32 3.37 4.49 5.62 13.48 15.538 23.44
26 3.43 3.45 3.50 4.67 5.84 14.02 16.16 24.37
27 3.56 3.58 3.64 4.85 6.06 14.55 16.78 25.31
28 3.69 3.72 3.77 5.03 6.29 15.09 17.50 26.25
29 3.82 3.85 3.91 5.21 6.51 15.63 18.02 27.18
30 3.95 3.98 4.04 5.39 6.74 16.17 18.64 28.12
31 4.09 4,12 4.18 5.57 6.96 16.71 19.26 29.06
32 4,22 4,25 4.31 5.75 7.19 17.25 19.88 30.00
33 4.35 4.38 4.45 5.93 7.41 17.79 20.51 30.93
34 4.48 4.51 4.58 6.11 7.64 18.33 21.13 31.87
35 4.61 4.65 4.72 6.29 7.86 18.87 21.75 32.81
36 4.75 4.78 4.85 6.47 8.09 19.41 22.37 33.75
37 4.88 4.91 4.99 6.65 8.31 19.94 22.99 34.68
38 5.01 5.04 5.12 6.83 8.53 20.48 23.61 35.62
39 5.14 5.18 5.26 7.01 8.76 21.02 24.23 36.56
40 5.27 5.31 5.39 7.19 8.98 21.56 24.86 37,50
41 5.40 5.44 5.53 7.37 9,21 22.10 25.48 38.43
42 5.54 5.58 5.66 UD) 9.43 22.64 26.10 39:37
43 5.67 5.71 5.79 1.3 9.66 23.18 26.72 40.31
44 5.80 5.84 5.93 7.91 9.88 23.72 27.34 41,25
45 5.93 od 6.06 8.09 10.11 24.26 27.96 42.18
46 6.06 6.11 6.20 8.27 10.33 24.80 28.58 43.12
47 6.20 6.24 6.33 8.45 10.56 25.34 29.21 44.06
48 6.33 6.37 6.47 8.62 10.78 25.87 29.83 45.00
49 6.46 6.51 6.60 8.80 11.01 26.41 30.45 45.93
50 6.59 6.64 6.74 8.98 11.23 26.95 31.07 46.87
51 6.72 6.77 6.87 9.16 11.45 27.49 31.69 47.81
52 6.85 6.90 7.01 9.34 11.68 28.03 32.31 48.74
53 6.99 7.03 7.14 9.52 11.90 28.57 32.93 49.68
54 el lly 7.28 9.70 12,13 29.11 33.55 50.62
55 7.25 7.30 7.41 9.88 12.35 29.65 34.18 51.56
56 7.38 7.43 Wie 10.06 12.58 30.19 34.90 52.49
57 eo 7.57 7.68 10,24 12.80 30.73 35.42 53.43
58 7.65 7.70 7.82 10.42 13.03 31.27 36.04 54.37
59 7.78 7.83 7:95 10.60 13.25 31.80 36.66 55.31
60 7.91 7.97 | 8.09 10.78 13.48 32.33 37.28 56.24

KILOMETRES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE. 507

German | Nautical French |Geograph’l| English

ieee || Mee | oAENIEaeN tg eretey | nee aero ves Siatute | Worsts.
61 8.04 8.10 8.22 10.96 13.70 32.88 37.90 57.18
62 8.17 8.23 8.36 11.14 13.93 33.42 38.53 58.12
63 8.30 8.36 8.49 11.32 14.15 33.96 39.15 59.06
64 8.44 8.50 8.62 11.50 14.37 34.50 O9ekd 59.99
65 8.57 8.63 8.76 11.68 14.60 35.04 40.39 60.93
66 8.70 8.76 8.89 11.86 ; 14.82 35.58 41.01 61.87
67 8.83 8.89 9.03 12.04 15.05 36.12 41.63 62.81
68 8.96 9.03 9.16 12.22 15.27 36.66 42.25 63.74
69 9.10 9.16 9.30 12.40 15.50 37.19 42.88 64.68
70 9.23 9.29 9.43 12.58 15.72 Dilele 43.50 65.62
aL 9.36 9.43 9.57 12.76 15.95 38.27 44,12 66.56
72 9.49 9.56 9.70 12.94 16.17 38.81 44,74 67.49
73 9.62 9.69 9.84 13.12 16.40 39.35 45.36 68.43
74 9.75 9.82 9.97 13.30 16.62 39.89 45.98 69.37
75 9.89 9.96 10.11 13.48 16.85 40.43 46.60 70.31

76 10.02 10.09 10.24 13.65 17.07 40.97 47.23 71.24

Ce A 10.15 10.22 10.38 13.84 17.29 41.51 47.85 72.18
78 10.28 10.36 10.51 14.02 17.52 42.05 48.47 73.12
79 10.41 10.49 10.65 14.20 17.74 42.59 49.09 74.05

80 10.55 10.62 10.78 14.37 17.97 43.12 49.71 74.99

10.75 10.92 14.55 18.19 43.66 50.33 75.93
10.89 11.05 14.73 18.42 44,20 50.95 76.87
11.02 11.19 14.91 18.64 44.74 51.57 77.80
11.15 11.32 15.09 18.87 45.28 52.20 78.74
11.28 11.45 15.27 19.09 45.82 52.82 79.68

11.42 11.59 15.45 19.32 46.36 53.44 80.62
11.55 11.72 15.63 19.54 46.90 54.06 81.55

11.68 11.86 15.81 Briel 47.44 54.68 82.49
11.82 11.99 15.99 OE o9 47.98 55.30 83.43,
11.95 12.13 16.17 20.21 48.51 55.92 84.37

12.08 12.26 16.35 20.44 49.05 56.55 85.30

12.21 12.40 16.53 20.66 49.59 57.17 86.24
12.35 12.53 16.71 20.89 50.13 57.79 87.18
12.48 12.67 16.89 21.11 50.67 58.41 88.12
12.61 12.80 17.07 21.34 51.21 59.03 89.05
12.74 12.94 17.25 21.56 51.74 59.65 89.99

13.01 13.21 17.61 22.01 52.83 60.90 91.87
13.14 |: 13.34 Toa 22.24 53.37 61.52 92.80
13.28

12.88 ‘ 13.07 17.43 21.79 52.29 60.27 90.93
13.48 17.97 22.46 53.91 62.14 93.74

508
I[. AUSTRIAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

German | Nautical French |Geograph'l| English

Austrian Kilo- Prussian | Miles. Leagues. | Leagues. on Nentivel Statute Russian
Miles. metres, Miles. 15=1° Eq. | 20=1° Eq. | 25=1° Eq. Ries Miles. Wersts.

1,000 | 7585.94 | 1007.10 | 1022.30 | 1363.07 | 1703.84 | 4089.21 | 4713.77 | 7111.06
2,000 |15171.87 | 2014.19 | 2044.61 | 2726.14 | 3407.68 | 8178.42 | 9427.54 |14222.11
3,000 |22757.81 | 3021.29 | 3066.91 | 4089.21 | 5111.52 |12267.64 |14141.30 |21333.17
4,000 |30343.75 | 4028.39 | 4089.21 | 5452.28 | 6815.35 |16356.85 |18855.07 |28444.22
5,000 |37929.69 | 5035.48 | 5111.52 | 6815.35 | 8519.19 |20446.06 |23568.84 |35555.28

6,000 |45515.62 | 6042.58 | 6133.82 | 8178.42 |10223.03 |24535.27 |28282.61 |42666.33
7,000 |53101.56 | 7049.67 | 7156.12 | 9541.50 |11926.87 |28624.49 |32996.38 |49777.39
8,000 |60687.50 | 8056.77 | 8178.42 |10904.57 |13630.71 |382713.70 |37710.14 |56888.45
9,000 |68273.43 | 9063.87 | 9200.73 |12267.64 |15334.55 |36802.91 |42423.91 |63999.50
10,000 |75859.37 |10070.96 |10223.03 |13630.71 |17038.38 |40892.12 |47137.68 |71110.56

100 758 59 100.71 102.23 | 136.31 170.38 | 408.92 | 471.38) (711.11
200 | 151719 | 201.42 | 204.46 | 272.61 340.77 817.84 | 942.75 | 1422.21
300 | 2275.78 | 302.13 | 306.69 | 408.92 | 511.15 | 1226.76 | 1414.13 | 2133.32
400 | 3034.37 | 402.84 | 408.92 | 545.23 681.54 | 1635.68 | 1885.51 | 2844.42
500 | 3792.97 503.55 511.15 681.54 | 851.92 | 2044.61 | 2356.88 | 3555.53

600 | 4551.56 | 604.26 | 613.38 | 817.84 | 1022.30 | 2453.53 | 2828.26 | 4266.63
700 | 5310.16 | 704.97 | 715.61 | 954.15 | 1192.69 | 2862.45 | 3299.64 | 4977.74
800 | 6068.75 | 805.68 | 817.84 | 1090.46 | 1363.07 | 3271.37 | 3771.01 | 5688.84
900 | 6827.34 | 906.39 | 920.07 | 1226.76 | 1533.45 | 3680.29 | 4242.39 | 6399.95
1000 | 7585.94 | 1007.10 | 1022.30 | 1363.07 | 1703.84 | 4089.21 | 4713.77 | 7111.06

1 7.59 1.01 1.02 1.36 1.70 4.09 4.71 7d
2 15.17 2.01 2.04 9:43 3.41 8.18 9.43 | 14.22
3 22.76 3.02 3.07 4.09 5.11 12.27| 1414] 21.33
4 30.34 4.03 4.09 5.45 6.82 | 16.36] 18.86] 28.44
5 37.93 5.04 5.11 6.82 8.52 | 20.45 | 23.57 | 35.56
Ca: 45.52 6.04 6.13 8.18 | 10.22 | 24.54] 28.28! 49.67
i 53.10 7.05 7.16 9.54| 11.93] 28.62] 33.00] 49.78
8 60.69 8.06 S18 |j- 20:90 |) 13163 | S2l7r |) Sim) pei
9 68.27 9.06 9.20| 12.27] 15.83] 36.80] 42.42] 64.00
10 75:86 |, 10:07 |) 10:22,)| 13:63 1) 1704 |) 40589 |) 4714) yaar
nT 83.45 | 11.08} 11.25] 14.99 18.74] 44.98] 51.85] 78.22
12 91.03 | 12.09 12.27] 16.36] 20.45 | 49.07) 56.57 | 85.33
13 98.62 | 13.09 | 13.29| 17:72 | 22.15] 53.16] 61.28 |) 92.44
14 106.20 | 14.10] 14.31 19.08 | 23.85 | 57.25 | 65.99} 99.55
15 113279 | 15:11 | |. 15133-)) Bolas |) 25:56 |) 61234 |) O70" | 06-67 ||
16 T2137 || Ves 16:36 || 24:81 27.26 | 65.43 | 75.42 | 113.78
Uy eae 128.96 | 17.12] 17.38 | 23.17| 28.97] 69.52] 80.13 | 120.89 |
| 18 136.55 | 18.13 |: 18.40] 24.54] 30.67 | 73.61 84.85 | 128.00 |,”
| 19 14413'|) 19.13 || 19.42 || 25:90]! 32:37 || ‘TETe|) $856 | basse |
| 20 151.72 | 20.14 | 20.45 27.26 34.08 81.78 94.28 | 142.22

E 62

509
AUSTRIAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

. ! : German | Nautical French |Geograph’l| Enolish 4
Austrian Kilo- Prussian Miles. Leagues. | Leagues. |Of Nautical! Giatnte Russian
Miles. metres, Miles. 15=1° Eq. | 20=1° Eq. | 25=1° Eq. Binlc Ea: Miles. Wersts.
21 159.30 | 21.15 21.47 28.62 35.78 85.87 98.99 | 149.33
22 166.89 | 22.16 22.49 29.99 37.48 89.96 | 103.70 | 156.44
23 174.48 | 23.16 23.51 31.35 39.19 94.05 108.42 | 163.55
24 182.06 | 24.17 24.54 32.71 40.89 98.14 | 113.13 | 170.67
25 189.65 | 25.18 25.56 34.08 42.60 102.23 | 117.84 | 177.78
26 197.23 | 26.18 26.58 35.44 44.30 106:32 | 122.56 | 184.89
27 204.82 | 27.19 27.60 36.80 46.00 110.41 | 127.27 | 192.00
28 212.41 | 28.20 28.62 38.17 47.71 114.50 | 131.99 | 199.11
29 219.99 | 29.21 29.65 39.53 49.41 118.59 | 136.70 | 206.22
30 227.58 | 30.21 30.67 40.89 51.12 122.68 | 141.41 | 213.33
31 235.16 | 31.22 31.69 42.26 52.82 126.77 | 146.13 | 220.44
32 242.75 | 32.23 32.71 43.62 54.52 130.85 | 150.84 | 227.55
33 250.34 | 33.23 33.74 44.98 56.23 134.94 | 155.55 | 234.66
34 257.92 | 34.24 34.76 46.34 57.93 139.03 | 160.27 | 241.78
30 265.51 35.25 35.78 47.71 59.63 143.12 | 164.98 | 248.89
36 273.09 | 36.26 36.80 49.07 61.34 147.21 | 162.70 | 256.00
37 280.68 | 37.26 37.83 50.43 63.04 151.30 | 174.41 | 263.11
38 288.27 | 38.27 38.85 51.80 64.75 155.39 | 179.12 | 270.22
39 295.85 | 39.28 39.87 53.16 66.45 159.48 | 183.84 | 277.33
40 303.44 | 40.28 40.89 54.52 68.15 163.57 7 188.55 | 284.44
'

41 311.02 | 41.29 41.91 55.89 69.86 167.66 |. 193.26 | 291.55
42 318.61 | 42.30 42.94 57.25 71.56 171.75 | 197.98 | 298.66
43 326.20 | 43.31 43.96 58.61 73.27 175.84 | 202.69 | 305.78
44 333.78 | 44.31 44.98 59.98 74.97 179.93 | 207.41 | 312.89
45 341.37 | 45.32 46.00 61.34 76.67 184.01 | 212.12 | 320.00
46 348.95 | 46.33 47.03 62.70 | 78.38 188.10 | 216.83 | 327.11
47 356.54 | 47.33 48.05 64.06 80.08 192.19 | 221.55 | 334.22
48 364.12 | 48.34 49.07 65.43 81.78 196.28 | 226.26 | 341.33
49 371.71 | 49.35 50.09 66.79 83.49 200.37 | 230.97 | 348.44
50 379.30 | 50.35 51.12 68.15 85.19 204.46 | 235.69 | 355.55
51 386.88 | 51.36 52.14 69.52 86.90 208.55 | 240.40 | 362.66
52 394.47 | 52.37 53.16 70.88 88.60 212.64 | 245.12 | 369.77
53 402.05 | 53.38 54.18 72.24 90.30 216.73 | 249.83 | 376.89
54 409.64 | 54.38 55.20 73.61 92.01 220.82 | 254.54 | 384.00
50 417.23 | 55.39 56.23 74.97 93.71 224.91 | 259.26 | 391.11

56 424.81 56.40 57.25 76.33 95.41 229.00 | 263.97 | 398.22
57 432.40 | 57.40 58.27 77.70 97.12 233.69 268.68 | 405.33
58 439.98 | 58.41 59.29 79.06 98.82 237.17 | 273.40 | 412.44
59 447.57 | 59.42 60.32 80.42 | 100.53 241.26 | 278.11 | 419.55
60 455.16 60.43 61.34 81.78 | 102.23 245.35 | 282.83 | 426.66

EK 63

510
AUSTRIAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

German | Nautical French |Geograph’l) English

Austrian |. Kilo- Prussian Miles Leagues Leagues. |O7 Nautical! Statute Russian

Miles. metres. Miles. 5—10 90—=1° Ea, 510 kq Miles. ; Wersts.
15=19 Eq. | 20=1° Eq. | 28=1° Eq. 60=1° Eq. Miles.

61 462.74 61.43 62.36 83.15 103.93 249.44 287.54 433.77

52 470.33 | 62.44 63.38 84.51 105.64 | 253.53 | 292.25 | 440.89
63 477.91 63.45 64.41 85.87 107.34 | 257.62 | 296.97 | 448.00
64 485.50 | 64.45 65.43 87.24 109.05 261.71 301.68 | 455.11

65 493.09 65.46 66.45 88.60 | 110.75 265.80 | 306.39 | 462.22
66 500.67 | 66.47 67.47 89.96 112.45 269.89 | 311.11 | 469.33
67 508.26 | 67.48 68.49 91.33 114.16 | 273.98 | 315.82 | 476.44
68 515.84 | 68.48 69.52 92.69 115.86 278.07 | 320.54 | 483.55
69 523.43 | 69.49 70.54 94.05 117.56 282.16 | 325.25 | 490.66
70 531.02 | 70.50 71.56 95.41 119.27 286.24 | 329.96 | 497.77
71 538.60 | 71.50 72.58 96.78 120.97 290.33 | 334.68 | 504.88
72 546.19 | 72.51 73.61 98.14 122.68 | 294.42 | 339.39 | 512.00
73 553.77 | 73.52 74.63 99.50 124.38 |; 298551 | 344.71 | 519.11
74 561.36 | 74.53 75.65 | 100.87 126.08 | 302.60 | 348.82 | 526.22
75 568.95 | 75.53 76.67 | 102.23 127.79 306.69 | 353.53 | 533.33
76 576.53 | 76.54 77.70 | 103.59 129.49 310.78 | 358.25 | 540.44
77 584.12 | 77.55 78.72 | 104.96 131.20 | 314.87 | 362.96 | 547.55
78 591.70 | 78.55 79.74 | 106.32 132.90 | 318.96 | 367.67 | 554.66
79 599.29 | 79.56 80.76 | 107.68 134.60 | 323.05 | 372.39 561.77
80 606.87 |. 80.57 81.78 | 109.05 136.31 327.14 | 377.10 | 568.88
81 614.46 | 81.57 82.81 { 110.41 138.01 331.23 | 381.82 | 576.00
82 622.05 | 82.58 83:83") Dae id 139.71 335.32 | 386.53 | 583.11
83 629.63 | 83.59 84.85 113.13 141.42 | 339.40 | 391.24 | 590.22
84 637.22 | 84.60 85.87 | 114.50 143.12 | 343.49 | 395.96 | 597.33
85 644.80 | 85.60 86.90 | 115.86 144.83 | 347.58 | 400.67 | 604.44
86 652.39 | 86.61 87.92: | 117.22 146.53 | 351.67 | 405.38 | 611.55
87 659.98 | 87.62 88294 | 118.59 148.23 | 355.76 | 410.10 |} 618.66
88 667.56 | 88.62 89°96. | 1119295 149.94 | 359.85 | 414.81 625.77
89 675.15 | 89.63 90.98 | 121.31 151.64 | 363.94 | 419.53 | 632.88
90 682.73 | 90.64 92.01 | 122.68 153.35 368.03 | 424.24 | 640.00
91 690.32 ; 91.65 93.03 | 124.04 155.05 | 372.12 | 428.95 | 647.11
92 697.91 | 92.65 94.05 | 125.40 156.75 376.21 | 433.67 | 654.22
93 705.49 | 93.66 95.07 | 126.77 158.46 | 380.30 | 438.38 | 661.33

94 713.08 | 94.67 96.10 | 128.13 160.16 | 384.39 | 443.09 | 668.44

95 720.66 | 95.67 $7.12 | 129.49 161.86 388.48 | 447.81 675.55
96 728.25 | 96.68 98.14 | 130.85 163.57 392.56 | 452.52 | 682.66
97 735.84 | 97.69 99.16 | 132.22 165.27 396.65 | 457.24 | 689.77
98 743.42 | 98.70 | 100.19 133.58 166.98 | 400.74 | 461.95 696.88
99 751.01 | 99.70 | 101.21 134.94 168.68 | 404.83 | 466.67 | 703.99

100 758.59 | 100.71 102.23 | 136.31 170.38 | 408.92 | 471.38 AMAL

E 64

III. PRUSSIAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE. 511

German | Nautical French |@eograph’l! English

Prassian Kilo- Austrian Miles. Leagues, | Leagues. |° Nautical) statute Russian
Miles, metres. Miles. | 15=1° Eq. | 20=1° Eq. | 25=1° Eq. Bosnia Miles. Wersts.

1,000 | 7532.48 | 992.95 | 1015.10 | 1353.47 | 1691.83 | 4060.40 | 4680.55 | 7060.95
2,000 )15064.97 | 1985.91 | 2030.20 | 2706.93 | 3383.67 | 8120.80 | 9361.11 [14121.90
3,000 |22597.45 | 2978.86 | 3045.30 | 4060.40 | 5075.50 |12181.19 |14041.66 }21182.85
4,000 |30129.94 | 3971.81 | 4060.40 | 5413.86 | 6767.33 |16241.59 |18722.21 |28243.79
5,000 |37662.42 | 4964.77 | 5075.50 | 6767.33 | 8459.16 20301.99 |23402.77 |35304.74

6,000 |45194.90 | 5957.72 | 6090.60 | 8120.80 |10151.00 |24362.39 /28083.32 |42365.69
7,000 |52727.39 | 6950.68 | 7105.70 | 9474.26 |11842.83 |28422.79 |32763.87 |49426.64
8,000 |60259.87 | 7943.63 | 8120.80 |10827.73 |13534.66 |32483.19 |37444.43 |56487.59
9,000 |67992.36 | 8936.58 | 9135.90 |12181.19 |15226.49 |36543.58 42124.98 |63548.54
10,000 |75324.84 | 9929.54 |10151.00 |13534.66 |16918.33 |40603.98 |46805.53 |70609.49

100 753.25 99.30 | 101.51 135.35 169.18 | 406.04 | 468.06 706.09
200 1506.50 198.59 203.02 | 270.69 338.37 | 81208 | 936.11 | 1412.19
300 | 2259.75 297.89 304.53 | 406.04 | 507.55 | 1218.12 | 1404.17 | 2118.28
400 | 3012.99 397.18 | 406.04 | 541.39 676.73 | 1624.16 | 1872.22 | 2824.38
500 3766.24 | 496.48 | 507.55 676.73 | 845.92 | 2030.20 | 2340.28 | 3530.47

600 | 4519.49 595.77 | 609.06 812.08 | 1015.10 | 2436.24 | 2808.33 | 4236.57
700 5272.74 | 695.07 710.57 | 947.43 | 1184.28 | 2842.28 | 3276.39 | 4942.66
800 6025.99 794.36 812.08 | 1082.77 | 1353.47 | 3248.32 | 3744.44 | 5648.76
900 6799.24 | 893.66 | 913.59 | 1218.12 | 1522.65 | 3654.36 | 4212.50 | 6354.85
1000 7532.48 | 992.95 | 1015.10 | 1353.47 | 1691.83 | 4060.40 | 4680.55 | 7060.95

1 53 0.99 1.02 1:35 1.69 4.06 4.68 7.06
2 15.06 1.99 2.03 2.71 3.38 8.12 9.36 14.12
3 22.60 2.98 3.05 4.06 5.08 12.18 14.04 21.18
4 39.13 3.97 4.06 5.41 6.77 16.24 18.72 28.24
5 37.66 4.96 5.08 6.77 8.46 20.30 23.40 35.30
6 45.19 5.96 6.09 8.12 10.15 24.36 28.08 42.37
7 52.73 6.95 7.11 9.47 11.84 28.42 32.76 49.43
8 60.26 7.94 8.12 10.83 13.53 32.48 37.44 56.49
9 67.79 8.94 9.14 12.18 15.23 36.54 42.12 63.55
10 75.32 9.93 10.15 13.53 16.92 40.60 46.81 70.61
1. 82.86 10.92 7 14.89 18.61 44.66 51.49 77.67
12 90.39 11.92 12.18 16.24 20.30 48.72 56.17 84.73
13 97.92 12.91 13.20 17.60 21.99 52.79 60.85 oi9
14 105.45 13.90 14.21 18.95 23.69 56.85 65.53 98.85
15 112.99 14.89 15.23 20.30 25.38 60.91 70.21 105.91
16 120.52 15.89 16.24 21.66 27.07 64.97 74.89 112.98
17 128.05 16.88 17.26 23.01 28.76 69.03 T9257 120.04
18 135.58 17.87 18.27 24.36 30.45 73.09 84.25 127.10
19 143.12 18.87 19.29 25.72 32.14 77.15 88.93 | 134.16
20 150.65 19.86 20.30 27.07 33.84 81.21 93.61 141.22

E 65

66

512
PRUSSIAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.
—

Prussian Kilo- Austrian pee Des Tee. oe Nautical Hugtigh Russian
Miles. metres. Miles. 15=1° Eq. | 20=1° Eq. | 25=1° Eq- Pee Miles. Wersts,
21 158.18 20.85 21.32 28.42 35:53 85.27 98.29 148.28
22 165.71 21.84 22.33 29.78 37.22 89.33 102.97 155.34
23 173.25 22.84 23.35 31.13 38.91 93.39 107.65 162.40
24 180.78 23.83 24.36 32.48 40.60 97.45 112.33 169.46
25 188.31 24.82 25.38 33.84 42.30 101.51 117.01 176.52
26 195.84 25.81 26.39 SD sg 43.99 105.57 121.69 183.58
27 203.38 26.81 27.41 36.54 45.68 109.63 126.37 190.65
28 210.91 27.80 28.42 37.90 47.37 113.69 131.06 WD (7L
29 218.44 28.80 29.44 39.25 49.06 TTS 135.74 204.77
30 225.97 29.79 30.45 40.60 50.75 121.81 140.42 211.83
31 233.51 30.78 31.47 41.96 52.45 125.87 145.10 218.89
32 241.04 31.77 32.48 43.31 54.14 129.93 149.78 225.95
33 248.57 32.77 33.50 44.66 55.83 133.99 154.46 233.01
34 256.10 33.76 34.51 46.02 57.52 138.05 159.14 240.07
35 263.64 34.75 35.53 47.37 59.21 142.11 163.82 247.13
36 271.17 35.75 36.54 48.72 60.91 146.17 168.50 254.19
37 278.70 36.74 37.56 50.08 62.60 150.24 173.18 261.26
38 286.23 37.73 38.57 51.43 64.29 154.30 177.86 268.32
39 293.77 38.73 39259 52.79 65.98 158.36 182.54 275.38
40 301.30 39.72 40.60 54.14 67.67 162.42 187.22 282.44
41 308.83 40.71 41.62 55.49 69.37 166.48 191.90 289.50
42 316.36 41.70 42.63 56.85 71.06 170.54 196.58 296.56
43 323.90 42.70 43.65 58.20 72.75 174.60 201.26 303.62
44 331.43 43.69 44.66 59.55 74.44 178.66 205.94 310.68
45 338.96 | 44.68 45.69 60.91 76.13 182.72 210.62 317.74
46 346.49 45.68 46.69 62.26 77.82 186.78 215.31 324.80
AT 353.03 46.67 47.72 63.61 79.52 190.84 219.99 331.86
48 361.56 | 47.66 48.72 64.97 81.21 194.90 224.67 338.93
49 369.09 48.65 49.75 66.32 82.90 198.96 229.35 345.99
50 376.62 | 49.65 50.75 67.67 84.59 203.02 234.03 353.05
pil 384.16 50.64 51.77 69.03 86.28 207.08 238.71 360.11
52 391.69 51.63 52.79 70.38 87.98 211.14 243.39 367.17
53 399.22 52.63 53.80 71.73 89.67 215.20 248.07 374.23
54 406.75 53.62 54.82 73.09 91.36 219.26 252.75 381.29
55 414.29 54.61 55.83 74.44 93.05 223.32 257.43 388.35
56 421.82 55.61 56.85 Tostd 94.74 227.38 262.11 395.41
57 429.35 56.60 57.86 W015 96.43 231.44 266.79 402.47
58 436.88 57259 58.88 78.50 98.13 235.50 271.47 409.53
59 444,42 58.58 59.89 79.85 99.82 239.56 276.15 416.60
60 451.95 59.58 60.91 81.21 101.51 243.62 280.83 423.66

513

PRUSSIAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

Prussian Kilo- Austrian aoe
Miles. metres. Miles. 15=1° Eq.
61 459.48 | 60.57 61.92
62 467.01 | 61.56 62.94
63 474.55 62.56 63.95
64 482.08 | 63.55 64.97
65 489.61 | 64.54 65.98
66 497.14 | 65.53 67.00
67 504.68 | 66.53 68.01
68 512.21 67.52 69.03
69 519.74 | 68.51 70.04
70 527.27 | 69.51 71.06
71 534.81 70.50 72.07
72 542.34 | 71.49 73.09
73 549.87 | 72.49 74.10
74 557.40 | 73.48 75.12
75 564.94 | 74.47 76.13
76 572.47 | 75.46 77.15
77 580.00 | 76.46 78.16
78 587.53 | 77.45 79.18
79 595.07 | 78.44 80.19
80 602.60 | 79.44 81.21
81 610.13 | 80.43 82.22
82 617.66 | 81.42 83.24
83 625.20 | 82.42 84.25
84 632.73 | 83.41 85.27
85 640.26 84.40 86.28
86 647.79 85.39 87.30
87 655.33 | 86.39 88.31
88 662.86 | 87.38 89.33
89 670.39 88.37 90.34
90 677.92 | 89.37 91.36
91 685.46 | 90.36 92.37
92 692.99 | 91.35 93.39
93 700.52 | 92.34 94.40
94 708.05 | 93.34 95.42
95 715.59 | 94.33 96.43
96 723.12 | 95.32 97.45
97 730.65 | 96.32 98.46
98 738.18 | 97.31 99.48
99 745.72 | 98.30 | 100.49
100 753.25 | 99.30 | 101.51

Nautical
Leagues

20=1° Eq.

82.56
83.91
85.27
86.62
87.98

89.33
90.68
92.04
93.39
94.74

96.10
97.45
98.80
100.16
101.51

102.86
104.22
105.57
106.92
108.28

109.63
110.98
112.34
113.69
115.04

116.40
117.75
Teo esta:

120.46 |
121.81 |

123.17 |

124.52
125.87
127.23
128.58

129-93
131.29
132.64
133.99
135.35

|Geograph’l

French Ens lish 5
Leagues. | Nautical Siatute Russian
25=1° Eq. Poa Miles. | Wersts.
103.20 247.68 285.51 430.72
104.89 251.74 290.19 437.78
106.59 255.81 294.87 444,84
108.28 259.87 299.56 451.90
109.97 263.93 304.24 458.96
111.66 267.99 308.92 | 466.02
MISeoo 272.05 313.60 473.08
115.04 276.11 318.28 480.14
116.74 | 280.17 322.96 | 487.21
118.42 | 284.23 | 327.64 | 494.27
120.12 288.29 332.32 501.33
121.81 292.35 337.00 508.3:
123.50 296.41 341.68 515.45
125.20 300.47 346.36 522.51
126.89 304.53 351.04 529.57
128.58 308.59 355.72 536.63
130.27 312.65 360.40 543.69
131.96 316.71 365.08 550.75
133.65 320.77 369.76 557.81
135.35 324.83 374.44 564.88
137.04 328.89 379.12 571.94
138.73 332.95 383.81 578.10
140.42 | 337.01 388.49 586.06
142.11 341.07 B93.17 593.12
143.81 345.13 397.85 600.18
145.50 349.19 402.53 607.24
147.19 353.25 407.21 614.30
148.88 357.32 411.89 621.36
150.57 361.38 416.57 628.42
152.26 365.44 421.25 635.49
153.96 369.50 425.93 642.55
155.65 373.56 430.61 649.61
157.34 | 377.62 | 435.29 656.67
159.03 381.68 439.97 663.73
160.72 385.74 444.65 670.79
162.42 | 389.80 | 449.33] 677.85 ||
164.11 393.86 | 454.01 684.91
165.80 397.92 458.69 691.97 ||
167.49 401.98 463.38 699.03
169.18 406.04 468.06 706.09

514

IV. GERMAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

2 . 2 Nautical

Sites! |, moter) | muted Up quulrensin nee eee
1,000 | 7420.44 978.18 985.13 | 1333.33
2,000 |14840.88 | 1956.37 | 1970.25 | 2666.67
3,000 |22261.32 | 2934.55 | 2955.38 | 4000.00
4,000 |29681.75 | 3912.73 | 3940.51 | 5333.33
5,000 /37102.19 | 4890.92 | 4925.63 | 6666.67
6,000 |44522.63 | 5869.10 | 5910.75 | 8000.00
7,000 |51943.07 | 6847.28 | 6895.88 | 9333.33
8,000 |59363.51 | 7825.47 | 7881.00 |10666.67
9,000 |66783.95 | 8803.65 | 8866.13 |12000.00
10,000 |74204.39 | 9781.83 | 9851.25 |13333.33
100 742.04 | 97.82 98.51 33333
200 1484.09 195.64 197.03 266.67
300 2226.13 293.46 295.54 400.00
400 2968.18 391.27 394.05 533.33
500 3710.22 | 489.09 492.56 666.67
600 4452.26 586.91 591.08 800.00
700 5194.31 684.73 689.59 933.33
800 5936.35 782.55 788.10 | 1066.67
900 6678.39 880.37 886.61 | 1200.00
1000 7420.44 978.18 985.13 |: 1833.33
iL 7.42 0.98 0.99 133
2 14.84 1.96 1397 2.67
3 22.26 2.93 2.96 3.00
4 29.68 3:91 3.94 5.33
5 37.10 4.89 4.93 6.67
6 44.52 5.87 59) 8.00
7 51.94 6.85 6.90 9.33
8 59.36 7.83 7.88 10.67
9 66.78 8.80 8.87 12.00
10 74.20 9.78 9.85 13:33
iT 81.62 10.76 10.84 14.67
12 89.05 11.74 11.82 16.00
13 96.47 12.72 12.81 17.33
14 103.89 13.69 13379 18.67
15 SL 14.67 14.78 20.00
16 118.73 15.65 15.76 21.33
ley 126.15 16.62 16.75 22.67
18 133.57 17.61 Mit 24.00
19 140.99 18.59 18.72 25.33
20 148.41 19.56 19.70 26.67
E 68

French
Leagues.
25=1° Eq.

1666.67
3333.33
5000.00
6666.67
8333.33

10000.00
11666.67
13333.33
15000.00
16666.66

166.67
333.33
500.00
666.67
833.33

1000.00
1166.67
1333.33
1500.00
1666.67

1.67
3.33
5.00
6.67
8.33

10.00
11.67
13.33
15.00
16.67

18.33
20.00
21.67
23.33
25.00

26.67
28.33
30.00
31.67
33.33

Geograph’l
or Nautical
Miles.
60=1° Eq.

4000.00
8000.00
12000.00
16000.00
20000.00

24000.00
28000.00
32000.00
36000.00
40000.00

400.00
800.00
1200.00
1600.00

2000.00

2400.00
2800.00
3200.00
3600.00
4000.00

4.00
8.00
12.00
16.00
20.00

24.00
28.00
32.00
36.00
40.00

44.00
48.00
52.00
56.00
60.00

64.00
68.00
72.00
76.00
80.00

English
Statute
Miles.

4610.93
9221.86
13832.79
18443.72
23054.66

27665.59
$2276.52
36887.45
41498.38
46109.31

461.09
922.19
1383.28
1844.37
2305.47

2766.56
3227.65
3688.74
4149.84
4610.93

4.61
9.22
13.83
18.44
23.05

27.67
32.28
36.89
41.50
46.11

50.72
55.33
59.94
64.55
69.16

footd
78.39
83.00
87.61
92.22

Russian
Wersts.

6955.92
13911.83
20867.75
27823.67
34779.59

41735.50
48691.42
55647.34
62603.26

69559.17

695.59
1391.18
2086.78
2782.37
3477.96

4173.55
4869.14
5564.73
6260.33
6955.92

6.96
13.91
20.87
27.82
34.78

41.74
48.69
55.65
62.60
69.56

76.52
83.47
90.43
97.38
104.34

111.29
118.25
125.21
132.16
139.12

515
GERMAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

Nautical | French |Geograph’l) English

GMB |) creieves | aioe | plies, || Reeegee | Deemer ("hte || SEMI, | avonaie,
60=1° Eq
21 155.83 | 20.54 20.69 28.00 35.00 84.00 96.83 | 146.07
22 163.25 | 21.52 21.67 29.33 36.67 88.00 | 101.44 | 153.03
23 170.67 22.50 22.66 30.67 38.33 92.00 | 105.05 159.99
24 178.09 23.48 23.64 32.00 40.00 96.00 110.66 166.94
25 185.51 24.45 24.63 33.33 41.67 100.00 | 115.27 173.90
26 192.93 | 25.43 25.61 34.67 43.33 104.00 | 119.88 | 180.85
27 200.35 26.41 26.60 36.00 45.00 108.00 | 124.50 187.81
28 207.77 27.39 27.58 37.33 46.67 112.00 | 128.11 194.77
29 215.19 28.37 28.57 38.67 48.33 116.00 133.72 | 201.72
30 222.61 | 29.35 29.55 40.00 50.00 120.00 | 138.33 | 208.68
31 230.03 | 30.32 30.54 41.33 51.67 124.00 | 142.94 | 215.63
32 237.45 31.30 31.52 42.67 53.33 128.00 | 147.55 222.59
33 244.87 | 32.28 32.51 44.00 55.00 132.00 152.16 229.55
34 252.29 | 33.26 33.49 45.33 56.67 136.00 | 156.77 | 236.50
35 259.72 | 34.24 34.48 46.67 58.33 140.00 | 161.38 | 243.46
36 267.14 | 35.21 35.46 48.00 60.00 144.00 | 165.99 | 250.41
37 274.56 36.19 36.45 49.33 61.67 148.00 170.60 | 257.37
38 281.98 37.17 37.43 50.67 63.33 152.00 | 175.22 | 264.32
39 289.40 | 38.15 38.42 52.00 65.00 156.00 | 179.83 | 271.28
40 296.82 | 39.13 39.40 53.33 66.67 160.00 | 184.44 | 278.24
41 304.24 | 40.11 40.39 54.67 68.33 164.00 | 189.05 285.19
42 311.66 | 41.08 41.38 56.00 70.00 168.00 193.66 | 292.15
43 319.08 | 42.06 42.36 57.33 71.67 172.00 | 198.27 | 299.10
44 326.50 | 43.04 43.35 58.67 73.33 176.00 202.88 306.06
45 333.92 | 44.02 44.33 60.00 75.00 180.00 | 207.49 313.02
46 341.34 | 45.00 45.32 61.33 76.67 184.00 | 212.10 | 319.97
47 348.76 45.97 46.30 62.67 78.33 188.00 | 216.71 326.93
48 356.18 | 46.95 47.29 64.00 80.00 192.00 | 221.33 | 333.88
49 363.60 | 47.93 48.27 65.33 81.67 196.00 | 225.94 | 340.84 |
50 371.02 | 48.91 49.26 66.67 83.33 200.00 | 230.55 347.80
51 378.44 | 49.89 50.24 68.00 85.00 204.00 | 235.16 | 354.75
52 385.86 50.87 51.23 69.33 86.67 208.00 | 239.77 361.71
53 393.28 | 51.84 52.21 70.67 88.33 212.00 | 244.38 | 368.66
54 400.70 | 52.82 53.20 72.00 90.00 216.00 | 248.99 | 375.62
55 408.12 53.80 54.18 73.33 91.67 220.00 | 253.60 382.58
56 415.54 | 54.78 55.17 74.67 93.33 224.00 | 258.21 | 389.53
57 422.96 | 55.76 56.15 76.00 95.00 228.00 | 262.82 | 396.49
58 430.39 | 56.73 57.14 77.33 96.67 232.00 | 267.43 | 403.44
59 437.81 | 57.71 58.12 78.67 98.33 236.00 | 272.05 | 410.40
60 445.23 58.69 59.11 80.00 | 100.00 240.00 | 276.66 | 417.36

516

GERMAN MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

—s.

French |Geograph’l
Leagues. °F Nautical
25=1° Eq. Miles.
60=1° Eq.
101.67 244.00
103.33 248.00
105.00 252.00
106.67 256.00
108.33 260.00
110.00 264.00
111.67 268.00
113.33 272.00
115.00 276.00
116.67 280.00
118.33 284.00
120.00 288.00
121.67 292.00
123.33 296.00
125.00 300.00
126.67 304.00
128.33 | 308.00
130.00 | 312.00
131.67 316.00
133.33 320.00
135.00 324.00
136.67 328.00
138.33 332.00
140.00 336.00
141.67 340.00
143.33 344.00
145.00 348 00
146.67 352.00
148.33 356.00
150.00 | 360.00
151.67 364.00
153.33 368.00 |
155.00 372.00
156.67 376.00
158.33 380.00
160.00 | 384.00
161.67 | 388.00 |
163.33 392.00
165.00 396.00
166.67 400.00

- ki Nautical

Sie: | sete’ | Meas MMEE ae
61 452.65 | 59.67 60.09 81.33
62 460.07 | 60.65 61.08 82.67
63 467.49 | 61.63 62.06 84.00
64 474.91 | 62.60 63.05 85.33
65 482.33 | 63.58 64.03 86.67
66 489.75 | 64.56 65.02 88.00
67 497.17 | 65.54 66.00 89.33
68 504.59 | 66.52 66.99 90.67
69 512.01 | 67.49 67.97 92.00
70 519.43 | 68.47 68.96 93.33
71 526.85 | 69.45 69.94 94.66
72 534.27 | 70.43 70.93 96.00
73 541.69 | 71.41 71.91 97.33
74 549.11 | 72.39 72.90 98.66
75 556.53 | 73.36 73.88 100.00
76 563.95 | 74.34 74.87 101.33
77 571237 | 75282 75.85 102.67
78 578.79 | 76.30 76.84 104.00
79 586.21 | 77.28 77.82 105.33
80 593.64 | 78.25 78.81 106.67
81 601.06 | 79.23 79.80 108.00
82 608.48 | 80.21 80.78 109.33
83 615.90 | 81.19 S177 110.67
84 623.32 | 82.17 82.75 112.00
85 30.74 | 83.15 83.74 113.33
86 638.16 | 84.12 84.72 114.67
87 645.58 | 85.10 85.71 116.00
88 653.00 | 86.08 86.69 117.33
89 660.42 | 87.06 87.68 118.67
90 667.84 | 88.04 88.66 120.00
91 675.26 | 89.01 89.65 121.33
92 682.68 | 89.99 90.63 122.67
93 690.10 | 90.97 91.62 124.00
94 697.52 | 91.95 92.60 125.33
95 704.94 | 92.93 93.59 126.67
96 712.36 | 93.91 94.57 128.00
97 719.7 94.88 95.56 129.33
98 727.20 | 95.86 96.54 130.67
99 734.62 | 96.84 97.53 132.00
100 742.04 | 97.82 98.51 133.33

E 70

English
Statute
Miles.

281.27
285.88
290.49
295.10
299.71

304.32
308.93
313.54
318.15
322.77

327.38
331.99
336.60
341.21
345.82

350.43
355.04
359.65
364.26
368.87

373.49
378.10
382.71
387.32

391.93 |

396.54
401.15
405.76
410.37
414.98

419.60 |

424,21

428.82 |

433.43
458.04

442.65
447.26
451.87
456.48
461.09

Russian
Wersts.

424.31
431.27
438.22
445.18
452.13

459.09
466.05
473.00
479.96
486.91

493.87
500.83
507.78
514.74
521.69

528.65
535.61
542.56
549.52
556.47

563.43
570.39
577.34
584.30
591.25

598.21
605.16
612.12
619.08
626.03

632.99
639.94
646.90
653.86
660.81

667.77
674.72
681.68
688.64
795.59

ee

517

V. NAUTICAL LEAGUES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

Nautical Kilo- Austrian | Prussian oe nae e Novus Xing tie Russian
Leagues. | metres, Miles. Miles. 15=1° Eq. | 25=1° Eq. Miles. Miles. Wersts.
60=1° Eq.

1,000 | 5565.33 733.64 | 738.84 | 750.00 | 1250.00 | 3000.00 | 3458.20 | 5216.94
2,000 |11130.66 | 1467.28 | 1477.69 | 1500.00 | 2500.00 | 6000.00 | 6916.40 |10433.88
3,000 |16695.99 | 2200.91 ! 2216.53 | 2250.00 | 3750.00 | 9000.00 |10374.59 |15650.81
4,000 |22261.32 | 2934.55 | 2955.38 | 3000.00 | 5000.00 |12000.00 |13832.79 |20867.75
5,000 |27826.64 | 3668.19 | 3694.22 | 3750.00 | 6250.00 |15000.00 |17291.00 |26084.69
6,000 |33391.98 | 4401.83 | 4433.06 | 4500.00 | 7500.00 |18000.00 |20749.19 |31301.63
7,000 |38957.30 | 5135.46 | 5171.91 | 5250.00 | 8750.00 |21000.00 |24207.39 |36518.57
8,000 |44522.63 | 5869.10 | 5910.75 | 6000.00 |10000.00 |24000.00 |27665.58 |41735.50
9,000 |50087.96 | 6602.74 | 6649.59 | 6750.00 |11250.00 |27000.00 |31123.78 |46952.44
10,000 |55653.29 | 7336.38 | 7388.44 | 7500.00 |12500.00 |30000.00 |34581.98 |52169.38
100 556.53 73.36 73.88 75.00 | 125.00 300.00 | 345.82 521.69
200 | 1113.07 146.73 147.77 150.00 | 250.00 600.00 | 691.64 | 1043.39
300 | 1669.60 220.09 221.65 225.00 375.00 | 900.00 | 1037.46 | 1565.08
400 | 2226.13 293.46 295.54 | 300.00 500.00 | 1200.00 | 1383.28 | 2086.78
500 | 2782.66 366.82 | 369.42 | 375.00 | 625.00 | 1500.00 | 1729.10 | 2608.47
600 | 3339.20 | 440.18 | 443.31 450.00 | 750.00 | 1800.00 | 2074.92 | 3130.16
700 | 3895.73 513.55 517.19 525.00 875.00 | 2100.00 | 2420.74 | 3651.86
800. | 4452.26 586.91 591.08 600.00 | 1000.00 | 2400.00 | 2766.56 | 4173.55
900 | 5008.80 660.27 664.96 675.00 | 1125.00 | 2700.00 | 3112.38 | 4695.24
1000 | 5565.33 733.64 | 738.84 | 750.00 | 1250.00 | 3000.00 | 3458.20 | 5216.94
1 5.57 0.73 0.74 0.75 1.25 3.00 3.46 5.22

2 11.13 1.47 1.48 1.50 2.50 6.00 6.92 10.43

3 16.70 2.20 2.22 2.25 3.75 9.00 10.37 15.65

4 22.26 2.93 2.96 3.00 5.00 12.00 13.83 20.87

5 27.83 3.67 3.69 3.75 6.25 15.00 17.29 26.08

6 33.39 4.40 4.43 4.50 7.50 18.00 20.75 31.30

7 38.96 5.14 5.17 5.25 8.75 21.00 24.21 36.52

8 44.52 5.87 5.91 6.00 10.00 24.00 27.67 41.74

9 50.09 6.60 6.65 6.75 11.25 27.00 31.12 46.95
10 55.65 7.34 7.39 7.50 12.50 30.00 34.58 52.17
11 61.22 8.07 8.13 8.25 13.75 33.00 38.04 57.39
12 66.78 8.80 8.87 9.00 15.00 36.00 41.50 62.60
13 72.35 9.54 9.60 9.75 | 16.25 | 39.00] 44.96 | 67.82
14 T1091 10.27 10.34 10.50 17.50 42.00 48.41 73.04
15 83.48 | 11.00 11.08 11.25 18.75 45.00 51.87 78.25
16 89.05 11.74 | 11.82] 12.00) 20.00 | 48.00 55.33 83.47
17 94.61 12.47 12.56 12.75 21.25 51.00 58.79 88.69
18 100.18 13.21 13.30 13.50 22.50 54.00 62.25 93.90
19 105.74 13.94 14.04 14.25 23.75 57.00 65.71 99.12
20 111.31 14.67 14.78 15.00 25.00 60.00 69.16 104,34

E 71

518

NAUTICAL LEAGUES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

French
Leagues.

26.25
27.50
28.75
30.00
31.25

32.50
33.75
35.00
36.25
37.50

38.75
40.00
41.25
42.50
43.75

45.00
46.25
47.50
48.75
50.00

51.25
52.50
53.75
55.00
56.25

57.50
58.75
60.00
61.25
62.50

63.75
65.00
66.25
67.50
68.75

70.00
71.25
72.50
73.75
75.00

25=1° Eq.

Geograph’]
or Nautical
Miles.
60=1° Eq.

63.00
66.00
69.00
72.00
75.00

78.00
81.00
84.00
87.00
90.00

93.00
96.00
99.00
102.00
105.00

108.00
111.00
114.00
117.00
120.00

123.00
126.00
129.00
132.00
135.00

138.00
141.00
144.00
147.00
150.00

153.00
156.00
159.00
162.00
165.00

168.00
171.00
174.00
177.00
180.00

English
Statute
Miles.

72.62
75.08
79.54
83.00
86.46

89.91
93.37
96.83

100.29

103.75

107.20
110.66
114.12
117.58
121.04

124.50
127.95
131.41
134.87
138.33

141.79
145.24
148.70
152.16
155.62

159.08
162.54
165.99
169.45
172.91

176.37
179.83
183.28
186.74
190.20

193.66
197.12
200.58
204.03

207.49 |

Russian
Wersts.

109.56
114.77
119.99
125.21
130.42

135.64
140.86
146.07
151.29
156.51

161.73
166.94
172.16
177.38
182.59

187.81
193.03
198.24
203.46
208.68

213.90
219.12
224.33
229.55
234.76

239.98
245.20
250.41
255.63
260.85

266.06
271.28
276.50
281.72
286.93

292.15
297.37
302.58
307.80
313.02

Nautical Kilo- Austrian | Prussian Gorman
Leagues. | metres. Miles. Miles. 15=1° Bq.
21 116.87 15.41 15.52 15.75
22 122.4 16.14 | 16.25] 16.50
23 128.00 16.87 16.99 17.25
24 133.57 17.61 17.73 18.00
25 139.13 18.34 18.47 18.75
26 144.70 19.07 19.21 19.50
27 150.26 19.81 19.95 20.25
28 155.83 20.54 20.69 21.00
29 161.39 21.28 21.43 21.75
30 166.96 22.01 22.17 22.50
ol 172.53 22.74 22.90 23.25
32 178.09 23.48 23.64 24.00
33 183.66 24.21 24.38 24.75
34 189.22 24.94 25.12 25.50
30 194.79 25.68 25.86 26.25
36 200.35 26.41 26.60 27.00
37 205.92 27.14 27.33 27.75
38 211.48 27.88 28.08 28.50
39 217.05 28.61 28.81 29.25
40 222.61 29.35 29.55 30.00
Al 228.18 30.08 30.29 30.75
42 233.74 30.81 31.03 31.50
43 239.31 31.55 31.77 32.25
44 244.87 32.28 32.51 33.00
45 250.44 33.01 33.25 33.75
46 256.01 33.75 33.99 34.50
AT 261.57 34.48 34.73 35.25
48 267.14 35.21 35.46 36.00
49 272.70 39.95 36.20 36.75
50 278.26 36.68 36.94 37.50
51 283.83 37.42 37.68 38.25
52 289.40 38.15 38.42 39.00
53 294.96 38.88 39.16 39.75
54 300.53 39.62 39.90 40.50
55 306.09 40.35 40.64 41.25
56 311.66 41.08 41.38 42.00
57 317.22 41.82 42.11 42.75
58 322.79 42.55 42.85 43.50
59 328.35 43.28 43.59 44.25
60 333.92 44.02 44.33 45.00
EK 72

519

NAUTICAL LEAGUES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

Nautical
Leagues.

61
62
63
64
65

66
67
68
69
70

71
72
73
74
75

76
Ut
78
79
80

81
82
83
84
85

86
87
88
89
90

91
92
93
94
95

96
97
98
99
100

Kilo-
metres.

339.49
345.05
350.62
356.18
361.75

367.31
372.88
378.44
384.01
389.57

395.14
400.70
406.27
411.83
417.40

422.96
428.53
434.10
439.66
445,23

450.79
456.36
461.92
467.49
473.05

478.62
484.18
489.75
495.31
500.88

506.44
512.01
517.58
523.14
528.71

534.27
539.84
545.40
550.97
556.53

Austrian
Miles.

44.75
45.49
46.22
_ 46.95
47.69

48.42
49.15
49.89
50.62
51.35

52.09
52.82
53.56
54.29
55.02

55.76
56.49
57.22
57.96
58.69

59.42,
60.16
60.89
61.63
62.36

63.09
63.83
64.56
65.29
66.03

66.76
67.49
68.23
68.96
69.70

70.43
71.16
71.90
72.63
73.36

German

French |Geograph’l

English

Prussian eae or Nautical 3 Russian
Miles | api, [SBE aire | Millen’ | Worst.
45.07 45.75 76.25 183.00 210.95 318.23
45.81 46.50 77.50 186.00 214.41 323.45
46.55 47.25 78.75 189.00 217.87 328.67
47.29 48.00 80.00 192.00 221.33 333.88
48.02 48.75 81.25 195.00 224.78 339.10
48.76 49.50 82.50 198.00 228.24 344.32
49.50 50.25 83.75 201.00 231.70 349.54
50.24 51.00 85.00 204.00 235.16 354.75
50.98 DART 86.25 207.00 238.62 359.97
51.72 52.50 87.50 210.00 242.07 365.19
52.46 53.25 88.75 213.00 245.53 370.40
53.20 54.00 90.00 216.00 248.99 375.62
53.94 54.75 91.25 219.00 252.45 380.84
54.67 55.50 92.50 222.00 255.91 386.05
55.41 56.25 93.75 225.00 259.37 391.27
56.15 57.00 95.00 228.00 262.82 396.49
56.89 Bifeto 96.25 231.00 266.28 401.70
57.63 58.50 97.50 234.00 269.74 | 406.92
58.37 59.25 98.75 237.00 273.20 412.14
59.11 60.00 100.00 240.00 276.66 417.36
59.85 60.75 101.25 243.00 280.11 | 422.57
60.59 61.50 102.50 246.00 283.57 | 427.79
61.32 62.25 103.75 249.00 287.03 433.01
62.06 63.00 105.00 252.00 290.49 438.22
62.80 63.75 106.25 255.00 293.95 443.44
63.54 64.50 107.50 258.00 297.41 448.66
64.28 65.25 108.75 261.00 300.86 453.87
65.02 66.00 110.00 264.00 304.32 459.09
65.76 66.75 111.25 267.00 307.78 | 464.31
66.50 67.50 112.50 270.00 311.24 | 469.53
67.23 68.25 113.75 273.00 314.70 | 474.74
67.97 69.00 115.00 276.00 318.15 479.96
68.71 69.75 116.25 279.00 321.61 485.18
69.45 70.50 117.50 282.00 325.07 490.39
70.19 71.25 118.75 285.00 328.53 495.61
70.93 72.00 120.00 288.00 331.99 500.83
71.67 72.75 12125 291.00 335.45 506.04
72.41 73.50 122.50 294.00 338.90 511.26
73.15 74.25 123.75 297.00 342.36 516.48
73.88 75.00 125.00 300.00 345.82 521.69

73

520
VI. FRENCH LEAGUES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE,

German Nautical |Geograph'l English

French Kilo- Austrian | Prussian Milos: Leacues, |OF Nautical) statute Russian
Leagues. | metres. Miles. Miles. 15=1° Eq, | 20=1° Eq. Miles. Miles. Wersts.

60=1° Eq.

bo

1,000 | 4452.26 586.91 591.07 600.00 800.00 | 2400.00 766.56 | 4173.55
2,000 | 8904.53 | 1173.82 | 1182.15 | 1200.00 | 1600.00 | 4800.00 | 5533.12 | 8347.10
3,000 |13356.79 | 1760.73 | 1773.22 | 1800.00 | 2400.00 | 7200.00 | 8299.67 |12520.65
4,000 |17809.05 | 2347.64 | 2364.30 | 2400.00 | 3200.00 | 9600.00 |11066.23 |16694.20
5,000 |22261.32 | 2934.55 | 2955.38 | 3000.00 | 4000.00 |12000.00 |13832.79 |20867.75

an

6,000 (26713.58 | 3521.46 | 3546.45 | 3600.00 | 4800.00 [14400.00 |16599.35 |25041.30
7,000 31165.84 4108.37 | 4137.53 | 4200.00 | 5600.00 16800.00 |19365.91 |29214.85
|| 8,000 35618.10 | 4695.28 | 4728.60 | 4800.00 | 6400.00 |19200.00 |22132.46 |33388.40
9,000 |40070.37 | 5282.19 | 5319.68 | 5400.00 | 7200.00 |21600.00 |24899.02 |37561.95
10,000 |44522.63 | 5869.10 | 5910.75 | 6000.00 | 8000.00 |24000.00 |27665.58 |41735.50

100 445.23 58.69 59.11 60.00 80.00 | 240.00 | 276.66 | 417.36
200 890.45 117.38 118.22 | 120.00 | 160.00 | 480.00 | 553.31 834.71
300 | 1335.68 176.07 177.32 | 180.00 | 240.00 | 720.00 | 829.97 | 1252.07
400 | 1780.91 234.76 236.43 | 240.00 | 320.00 | 960.00 | 1106.62 | 1669.42
500 | 2226.13 | 293.46 | 295.54 | 300.00 | 400.00 | 1200.00 | 1383.28 | 2086.78

600 | 2671.36 352.15 394.65 360.00 | 480.00 | 1440.00 | 1659.93 | 2504.13
700 | 3116.58 | 410.84 | 413.75 | 420.00 | 560.00 | 1680.00 | 1936.59 | 2921.49
800 | 3561.81 469.53 | 472.86 | 480.00 640.00 | 1920.00 | 2213.25 | 3338.84
900 | 4007.04 | 528.22 531.97 540.00 720.00 | 2160.00 | 2489.90 | 3756.20
1000 | 4452.26 586.91 591.07 600.00 | 800.00 | 2400.00 | 2766.56 | 4173.55

1 4.45 0.59 0.59 0.60 0.80 2.40 2.77 4.17
2 8.90 Pay 1.18 1.20 1.60 4.80 5.53 8.35
3 13.36 1.76 oad 1.80 2.40 7.20 8.30 12.52
4 17.81 2.35 2.36 2.40 3.20 9.60 11.07 16.69
5 22.26 2.93 2.96 3.00 4.00 12.00 13.83 20.87
6 26.71 3.52 3.55 3.60 4.80 14.40 16.60 25.04
7 31.17 4.11 4.14 4.20 5.60 16.80 19.37 29.21
8 35.62 4.70 4.73 4.80 6.40 19.20 22.13 33.39
9 40.07 5.28 5.32 5.40 7.20 21.60 24.90 37.56
10 44,52 5.87 5.91 6.00 8.00 24.00 27.67 41.74
fell 48.97 6.46 | 6.50 6.60 8.80 26.40 30.43 45.91
12 53.43 7.04 7.09 7.20 9.60 28.80 33.20 50.08
13 57.88 7.63 7.68 7.80 10.40 31.20 35.97 54.26
14 62.33 8.22 8.28 8.40 11.20 33.60 38.73 58.43
15 66.78 8.80 8.87 9.00 12.00 36.00 41.50 62.60
16 71.24 9:39 9.46 9.60 12.80 38.40 44.26 66.78
dss 75.69 9.98 10.05 10.20 13.60 40.80 47.03 70.95
18 80.14 10.56 10.64 10.80 14.40 43.20 49.80 75.12
19 $4.59 AD'S 11.23 11.40 15.20 45.60 52.56 79.30
20 89.05 11.74 11.82 12.00 16.00 48.00 55.33 83.47

Ph ae he eee eee eee
E 74

521

FRENCH LEAGUES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

French
Leagues.

|

26
27
28
29

30

dl
32
33
34

36

38
39
40

41
42
43

45

51
52
53
54
55

56
57
58
59
60

Kilo-
metres,

115.76
120.21
124.66
129.12
133.57

138.02
142.47
146.92
151.38
155.83

160.28
164.73
169.19
173.64
178.09

182.54
187.00
191.45
195.90
200.35

204.80
209.26
213.71
218.16
222.61

227.07
231.52
235.97
240.42
244.87

249.33
253.78
258.23
262.68
267.14

Austrian
Miles.

Prussian
Miles.

German
Miles.
15=1° Eq.

Nautical
Leagues.
2012" hg)

24.80
25.60
26.40
27.20
28.00

28.80
29.60
30.40
31.20
32.00

32.80
33.60
34.40
35.20
36.00

36.80
37.60
38.40
39.20
40.00

40.80
41.60
42.40
43.20
44.00

44.80
45.60
46.40

47.20
48.00

Geograph’l
or Nautical

Miles.

60=1° Eq.

50.40
52.80
55.20
57.60
60.00

62.40
64.80
67.20
69.60
72.00

74.40
76.80
79.20
81.60
84.00

86.40
85.80
91.20
93.60
96.00

98.40
100.80
103.20
105.60
108.00

110.40
112.80
115.20
117.60
120.00

122.40
124.80
127.20
129.60
152.00

134.40
136.80
139.20
141.60
144.00

English
Statute
Miles.

58.10
60.86
63.63
66.40
69.16

71.93
74.70
77.46
80.23
83.00

85.76
88.53
91.30
94.06
96.83

99.60
102.36
105.13
107.90
110.66

113.43
116.20
118.96
121.73
124.50

127.26
130.02
132.79
135.56
138.33

141.09
143.86
146.63
149.39
152.16

154.93
157.69
160.46
163.23
165.99

Russian
Wersts.

87.64
91.82
95.99
100.17
104.34

108,51
112.69
116.86
121.03
125.21

129.38
133.55
137.73
141.90
146.07

150.25
154.42
158.59
162.77
166.94

171.12
175.29
179.46
183.64
187.81

191.98
196.16
200.33
204.50
208.68

212.85
217.02
221.20
225.37
229.55

233.72
237.89
242.07
246.24
250.41

522

FRENCH LEAGUES INTO DIFFERENT GEOGRAPHICAL

MEASURES OF DISTANCE.

French
Leagues.

66

76
77
78
79
80

86
87
88
89
90

91
92
93
94
95

96
97
98
99
100

Kilo-

metres.

271.59
276.04
280.49
284.94
289.40

293.85
298.30
302.75
307.21
311.66

316.11
320.56
325.02
329.47
333.92

338.37
342.82
347.28
301.73
356.18

360.63
365 09
369.54
373.99
378.44

382.89
387.35
391.80
396.25
400.70

405.16
409.61
414.06
418.51
422.56

427.42
431.87
436.32
440.77
445.23

Austrian

Miles.

41.67
42.26
42.84
43.43
44.02

44.61
45.19
45.78
46.37
46.95

47.54
48.13
48.71
49.30
49.89

50.47
51.06
51.65
52.2:

52.82

53.41
54.00
54.58
55.7
55.76

56.34
56.93
57.52
58.10
58.69

Prussian

Miles.

German Nautical
Miles. Leagues.

15=1° Eq. | 20=1° Eq.

41.40 55.20
42.00 56.00

42.60 56.80
43.20 57.60
43.80 58.40
44.40 59.20
45.00 60.00

45.60 60.80
46.20 61.60
46.80 62.40
47.40 63.20

48.00 64.00
48.60 64.80
49.20 65.60
49.80 66.40
50.40 67.20
51.00 68.00
51.60 68.80
52.20 69.60
52.80 70.40
53.40 71.20
54.00 72.00
54.60 72.80
55.20 73.60
55.80 74.40
56.40 75.20
57.00 76.00
57.60 76.80
58.20 77.60
58.80 78.40
59.40 79.20
60.00 80.00

Geograph’l
or Nautical
Miles.
60=1° Eq.

146.40
148.80
151.20
153.60
156.00

158.40
160.80
163.20
165.60
168.00

170.40
172.80
175.20
177.60
180.00

182.40
184.80
187.20
189.60
192.00

194.40
196.80
199.20
201.60
204.00

206.40
208.80
211.20
213.60
216.00

218.40

20.80
223.20
225.60
228.40

230.40
232.80
235.20
237.60
240.00

English
Statute
Miles.

177.06
179.83

182.59
185.36
188.13
190.89
193.66

196.43
199.19
201.96
204.73
207.49

210.26
213.03
215.79
218.56
221.32

224.09
226.86
229.62
232.39
235.16

237.92
240.69
243.46
246.22
248.99

251.76
254.52
257.29
260.06
262.82

265.59
268.36
271.12
273.89
276.66

Russian
Wersts.

258.76
262.93
267.11
271.28

275.45
279.63
283.80
287.97
292.15

296.32
300.50
304.67
308.84
313.02

317.19
321.36
325.54
329.71
333.88

338.06
342.23
346.40
350.58
354.75

358.93
363.10
367.27
371.45
375.62

379.79
383.97
388.14
392.31
396.49

400.66
404.83
409.01
413.18
417.36

523

VII. GEOGRAPHICAL OR NAUTICAL MILES INTO DIFFERENT GEOGRAPHICAL
MEASURES OF DISTANCE,

Geogra- : F German Nautical French English 5
phical Kilo- Avstien Eanesian Miles. Leagues. | Leagues. Statute Eussien
Miles. | Metres. Miles. iles. | 15=1° Eq. | 20=1° Eq. | 25=1° Eq.| Miles. ersts.

1,000 | 1855.11 | 244.55 | 246.28 | 250.00 | 333.33 | 416.67 | 1152.73 | 1738.98
2,000 | 3710.22 | 489.09 | 492.56 500.00 | 666.67 833.33 | 2305.47 | 3477.96
3,000 | 5565.33 | 733.64 | 738.84 | (750.00 | 1000.00 | 1250.00 | 3458.20 | 5216.94
4,000 | 7420.44 | 978.18 | 985.13 | 1000.00 | 1333.33 | 1666.67 | 4610.93 | 6955.92
5,000 | 9275.55 | 1222.73 | 1231.41 | 1250.00 | 1666.67 | 2083.33 | 5763.66 | 8694.90

6,000 |11130.66 | 1467.28 | 1477.69 | 1500.00 | 2000.00 | 2500.00 | 6916.40 |10433.88
7,000 |12985.77 | 1711.82 | 1723.97 | 1750.00 | 2333.33 | 2916.67 | 8069.13 |12172.86
8,000 |14840.88 | 1956.37 | 1970.25 | 2000.00 | 2666.67 | 3333.33 | 9221.86 |13911.83
9,000 |16695.99 200.91 | 2216.53 | 2250.00 | 3000.00 | 3750.00 |10374.59 |15650.81
10,000 |18551.10 | 2445.46 | 2462.81 | 2500.00 | 3333.33 | 4166.67 |11527.33 |17389.79

100 185.51 24.45 24.63 25.00 33.39 41.67 115.27 173.90
200 371.02 48.91 49.26 50.00 66.67 83.33 | 230.55 347.80
300 556.53 73.36 73.88 75.00 100.00 | 125.00 345.82 | 521.69
400 742.04 97.82 98.51 100.00 133.33 | 166.67 | 461.09 695.59
500 927.56 | 122.27 | 123.14 | 125.00 | 166.67 | 208.33 | 576.37 869.49

600 | 1113.07 | 146.73 | 147.77 | 150.00 | 200.00 | 250.00 691.64 | 1043.39

700 1298.58 171.18 172.40 175.00 || 233:33 | 29967 806.91 | 1217.29
800 | 1484.09 195.64 | 197.03 } 200.00 | 266.67 | 333.33 922.19 | 1391.18
900 | 1669.60 | 220.09 221.65 225.00 | 300.00 | 375.00 | 1037.46 | 1565.08
1000 1855.11 244.55 246.28 | 250.00 | 333.33 | 416.67 | 1152.73 | 1738.98
1 1.86 0.24 0.25 0.25 0.33 0.42 ne) 1.74
2 3.71 0.49 0.49 0.50 0.67 0.83 2.31 3.48
3 5.57 0.73 0.74 0.75 1.00 1.25 3.46 5.22
+t 7.42 0.98 0.99 1.00 1.33 1.67 4.61 6.96
5 9.28 1.22 1.23 1.25 1.67 2.08 5.76 8.69
6 dS 1.47 1.48 1.50 2.00 2.50 6.92 10.43
7 12.99 1.71 1.72 1.75 2.33 2.92 8.07 12.17
8 14.84 1.96 1.97 2.00 2.67 3.33 9.22 13.91
9 16.70 2.20 2.22 2.25 3.00 3.75 10.37 15.65
10 18.55 2.45 2.46 2.50 3.33 4.17 11.53 17.39
11 20.41 2.69 2.71 2.75 3.67 4.58 12.68 19.13
12 22.26 2.93 2.96 3.00 4.00 5.00 13.83 20.87
13 24.12 3.18 3.20 3.25 4.33 5.42 14.99 22.61
14 25.97 3.42 3.45 3.50 4.67 5.83 16.14 24.35
15 27.83 3.67 3.69 3.75 5.00 6.25 17.29 26.08
16 29.68 3.91 3.94 4.00 5.33 6.67 18.44 27.82
17 31.54 4.16 4.19 4.25 5.67 7.08 19.60 29.56
18 33.39 4.40 4.43 4.50 6.00 7.50 20.75 31.30
19 35.25 4.65 4.68 4.75 6.33 7.97 21.90 33.04
20 37.10 4.89 4.93 5.00 6.67 8.33 23.05 34.78
eee

E 17

524
GEOGRAPHICAL OR NAUTICAL MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF
DISTANCE.

Gesere | ig’ || quate. | ernest || Sppana’ | Mamet | ESOS |) aera |) aad
Milos: metres, Miles. Miles, 15=1° Eq. | 20=19 Eq. 25=1° Eq. Miles, Wersts.
21 38.96 5.14 owls 5.25 7.00 8.75 24.21 36.52
22 40.81 5.38 5.42 5.50 eae Selif 25.36 38.26
23 42.67 5.62 5.66 5.15 7.67 9.58 26.51 40.00
24 44.52 5.87 Deo 6.00 8.00 10.00 27.67 41.74
25 46.38 6.11 6.16 6.25 8.33 10.42 28.82 43.47
26 48.23 6.36 6.40 6.50 8.67 10.83 29.97 44.51
27 50.09 6.60 6.65 6375 9.00 41.25 31.12 46.95
28 51.94 6.85 6.90 7.00 9233 11.67 32.28 48.69
29 53.80 7.09 7.14 7.25 9.67 12.08 33.43 50.43
30 55.65 7.34 "239 7.50 10.00 12.41 34.58 §2.17
31 Sie ou 7.58 7.63 TGCS 10.33 12.92 35.73 53391
32 59.36 7.83 7.88 8.00 10.67 13.33 36.89 55.65
33 61.22 8.07 8.13 8.25 11.00 13.75 38.04 51239
34 63.07 8.31 8.37 8.50 11533 14.17 39.19 59.13
35 64.93 8.56 8.62 8.75 11.67 14.58 40.35 60.86
36 66.78 8.80 8.87 9.00 12.00 15.00 41.50 62.60
37 68.64 9.05 Sela 9.25 12.33 15.42 42.65 64.34
38 70.49 9.29 9.36 9.50 12.67 15.83 43.80 66.08
39 72.35 9.54 9.60 9x45 13.00 16.25 44.96 67.82
40 74.20 9.78 9.85 10.00 13.33 16.67 46.11 69.56
41 76.06 10.03 10.10 10.25 13.67 17.08 47.26 71.30
42 leon! 10.27 10.34 10.50 14.00 17.49 48.41 73.04
43 heat, 10.52 10.59 10.75 14.33 17.92 49.57 74.78
44 81.62 10.76 10.84 11.00 14.67 18.33 50.72 76.52
45 83.48 11.00 11.08 11.25 15.00 18.75 51.87 78.25
46 85.34 11.25 1133 11.50 15.33 LOA 53.03 79.99
47 87.19 11.49 11.58 5 15.67 19.58 54.18 81.73
48 89.05 11.74 11.82 12.00 16.00 20.00 55.33 83.47
49 90.90 11.98 12.07 12.25 16.33 20.42 56.48 85.21
50 92.76 12.23 12.31 12.50 16.67 20.83 57.64 86.95
Dil 94.61 12.47 12.56 12.75 17.00 21.25 58.79 88.69
52 96.47 12.72 12.81 13.00 17.33 21.67 59.94 90.43
DS 98.32 12.96 13.05 13.25 Ge 22.08 61.09 92.17
54 100.18 13.21 13.30 13.50 18.00 22.50 62.25 93.90
55 102.03 13.45 13255 13.75 18.33 22.92 63.40 95.64
| 56 103.89 13.69 13279 14.00 18.67 23.33 64.55 97.38

57. 105.74 13.94 14.04 14,25 19.00 23.75 65.71 99.12

58 107.60 14.18 14.28 14.50 19R33 24.17 66.86 100.86

59 109.45 14.43 14.53 14.75 19.67 24.58 68.01 102.60

60 hides 14.67 14.78 15.00 20.00 25.00 69.16 104.34
KB 78

——

525
GEOGRAPHICAL OR NAUTICAL MILES INTO DIFFERENT GEOGRAPHICAL MEASURFS OF

DISTANCE,
ea cone’ | sane erece || Seems Sess | Acces | Pe || sate
Miles. metres, Miles. Miles. 15=1° Eq. | 20=1° EQ. | 25=1° Eq. Miles. Wersts.
61 113.16 14.92 15.02 15.25 20.33 25.42 70.32 106.08
62 115.02 15.16 15.27 15.50 20.67 25.83 71.47 107.82
63 116.87 15.41 15.52 15.75 21.00 26.25 72.62 109.56
64 118.73 15.65 15.76 16.00 21.33 26.67 73.77 11129
65 120.58 | 15.90 16.01 16.25 21.67 27.08 14293 | 113;03
66 122.44 | 16.14 16.25 16.50 22.00 27.50 76.07 114.77
67 124.29 16.38 16.50 16.75 22.33 27.92 die2o |) T6¢5i
68 126.15 16.63 16.75 17.00 22.67 28.33 78.39 118.25
69 128.00 16.87 NGs99 17.25 23.00 28.75 79.54 DROS)
70 129.86 17.12 17.24 17.50 23.33 29.17 80.69 121.73
71 1B 17.36 17.49 17.75 23.67 29.58 81.84 | 123.47
72 133.57 17.61 NG) 18.00 24.00 30.00 83.00 125.21
73 135.42 17.85 17.98 18.25 24.33 30.42 84.15 126.95
74 137.28 18.10 18.22 18.50 24.67 30.83 85.30 128.68
75 139.13 18.34 18.47 18.75 25.00 31.25 86.46 130.42
76 140.99 18.59 18.72 19.00 25.33 31.67 87.61 132.16
77 142.84 18.83 18.96 19.25 25.67 32.08 88.76 133.90
78 144.70 19.07 Ot 19.50 26.00 32.50 89.91 135.64
qo 146.55 19.32 19.46 19.75 26.33 32.92 91.07 137.38
80 148.41 19.56 19.70 20.00 26.67 33.09 92.22 139.12
81 150.26 19.81 19.95 20.25 27.00 33.75 93-371 140.86
82 152.12 20.05 20.20 20.50 27.33 34.17 94.52 142.60
83 153-977, 20.30 20.44 20.75 27.67 34.58 95.68 144.34
84 155.83 20.54 20.69 21.00 28.00 39.00 96.83 146.07
85 157.68 20.79 20.93 21.25 28.33 35.42 97.98 147.81
86 159.54 | 21.03 21.18 21.50 28.67 35.83 99.13 149.55
87 161.39 21.28 21.43 21.75 29.00 36.25 100.29 151.29
88 163.25 21.52 21.67 22.00 29.33 36.67 101.44 153.03
89 165.10 21.76 21.92 22.25 29.67 37.08 102.59 154.77
90 166.96 22.01 22.17 22.50 30.00 37.50 103.75 156.51
91 168.82 22.25 22.41 22.75 30.33 37.92 104.90 158.25
92 170.67 22.50 22.66 23.00 30.67 38.39 106.05 159.99
3 172.53 22.74 22.90 23.25 31.00 38.75 107.20 161.73
94 174.38 22.99 23.15 23.50 31.33 39.17 108.36 163.46
95 176.24 | 23.23 23.40 | 23.75 31.67 39.58 109.51 165.20
96 178.09 23.48 23.64 24.00 32.00 40.00 110.66 166.94
97 179.95 | 23.72 23.89 24.25 32.33 40.42 111.82 168.68
98 181.80 23.97 24.14 24.50 32.67 40.83 112.97 170.42
99 183.66 24.21 24.38 24.75 33.00 41.25 114.12 172.17
100 185.51 | 24.45 24.63 25.00 30.09 41.67 115.27 173.90
t

526

VIII. ENGLISH STATUTE MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF
DISTANCE
pugley Kilo- Austrian Prussian Gernien Deer. reneh or Naat Russian
Miles. metres, Miles, Miles. 15=1° Eq. | 20=1° Kq. 951° Bq. Miles. Wersts.
60=1° Eq.
1,000 | 1609.31 212.14 213.65 216.88 289.17 361.46 867.50 | 1508.57
2,000 | 3218.63 424.29 427.30 433.75 578.34 722.92 | 1735.01 | 3017.14
3,000 | 4827.94 636.43 640.95 650.63 867.50 | 1084.38 | 2602.51 | 4525.71
4,000 | 6437.26 848.58 854.60 867.50 | 1156.67 | 1445.84 | 3470.02 | 6034.29
5,000 | 8046.57 | 1060.72 | 1068.25 | 1084.38 | 1445.84 | 1807.30 | 4337.52 | 7542.86
6,000 | 9655.89 | 1272.87 | 1281.90 | 1301.26 | 1735.01 | 2168.76 | 5205.02 | 9051.43
7,000 {11265.20 | 1485.01 | 1495.55 | 1518.13 | 2024.18 | 2530.22 | 6072.53 |10560.00
8,000 }12874.52 | 1697.16 | 1709.20 | 1735.01 | 2313.34 | 2891.68 | 6940.03 |12068.57
9,000 |14483.83 | 1909.30 | 1922.85 | 1951.88 | 2602.51 | 3253.14 | 7807.54 |13577.14
10,000 |16093.15 | 2121.45 | 2136.50 | 2168.76 | 2891.68 | 3614.60 | 8675.04 |15085.71
100 160.93 21.21 21.36 21.69 28.92 36.15 86.75 150.86
200 321.86 42.43 42.73 43.38 57.83 72.29 173.50 301.71
300 482.79 63.64 64.09 65.06 86.75 108.44 260.25 452.57
400 643.73 84.86 85.46 86.75 115.67 144.58 347.00 603.43
500 804.66 106.07 106.82 108.44 144.58 180.73 433.75 754.29
600 965.59 127.29 128.19 130.13 173.50 16.88 520.50 905.14
700 | 1126.52 | 148.50 | 149.55 | 151.81 | 202.42 | 953.02 ) 607.25 | 1056.00
800 1287.45 169.72 170.92 173.50 231.33 289.17 694.00 | 1206.86
900 1448.38 190.93 192.28 195.19 260.25 325.31 780.75 | 1357.71
1000 1609.31 212.14 213.65 216.88 289.17 361.46 867.50 | 1508.57
1 1.61 0.21 0.21 0.22 0.29 0.36 0.87 alten
2 3.22 0.42 0.43 0.43 0.58 0.72 1.74 3.02
3 4.83 0.64 0.64 0.65 0.87 1.08 2.60 4.53
4 6.44 0.85 0.85 0.87 1.16 1.45 3.47 6.03
5 8.05 1.06 1.07 1.08 1.45 1.81 4.34 7.54
6 9.66 1.27 1.28 1.30 1.74 erled) 5.21 9.05
i 11.27 1.49 1.50 1.52 2.02 2.53 6.07 10.56
8 12.87 1.70 1.71 1.74 Qi 2.89 6.94 12:07
9 14.48 1.91 1.92 1.95 2.60 3.25 7.81 13.58
10 16.09 2.12 2.14 Dele, 2.89 3.61 8.68 15.09
11 17.70 2.33 2.35 2.39 3.18 3.98 9.54 16.59
12 19.31 2.55 2.56 2.60 3.47 4.34 10.41 18.10
13 20.92 2.76 2.78 2.82 3.76 4.70 11.28 19.61
14 22.53 2.97 2.99 3.04 4.05 5.06 12.15 21.12
15 24.14 3.18 3.20 3.25 4.34 5.42 13.01 22.63
16 25.75 3.39 3.42 3.47 4.63 5.78 13.88 24.14
“17 27.36 3.61 3.63 3.69 4.92 6.14 14.75 25.65
18 28.97 3.82 3.85 3.90 5.21 6.5i 15.62 27.15
19 30.57 4.03 4.06 4.12 5.49 6.87 16.48 28.66
20 32.19 4.24 4.27 4.34 5.78 7.23 Meow 30.17
E 30

527
ENGLISH STATUTE MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

eee Kilo- Austrian | Prussian Serer re io ae N notice Russian
Milen metres. Miles. Miles. 15=1° Eq. | 20=1° Eq. 25=1° Eq- Miles. W ersts.
60=1° Eq.
21 33.80 4.46 4.49 4.55 6.07 soo 18.22 31.68
22 35.40 4.67 4.70 4.77 6.36 7.95 19.09 33.19
23 37.01 4.88 4.91 4.99 6.65 8.31 19.95 34.70
24 38.62 5.09 5.13 5.21 6.94 8.68 20.82 36.21
25 40.83 5.30 5.34 5.42 7.23 9.04 21.69 Si.dL
26 41.84 5.52 5.55 5.64 7.52 9.40 22.56 39.22
27 43.45 5.73 Ded 5.86 7.81 9.76 23.42 40.73
28 45.06 5.94 5.98 6.07 8.10 10.12 24.29 42.24
29 46.67 6.15 6.20 6.29 8.39 10.48 25.16 43.75
30 48.2 6.36 6.41 6.51 8.68 10.84 26.03 45.26
31 49.89 6.58 6.62 6.72 8.96 11.21 26.89 46.77
32 51.50 6.79 6.84 6.94 9.25 11.57 27.76 48.27
33 Hoi 7.00 7.05 7.16 9.54 11.92 28.63 49.78
34 54.72 7.21 7.26 leo 9.83 12.29 29.50 51.29
35 56.33 7.43 7.48 eoo 10.12 12.65 30.36 52.80
36 57.94 7.64 7.69 7.81 10.41 13.01 31.23 54.31
37 59.54 7.85 agi 8.02 10.70 Me Kei// 32.10 55.82
38 61.15 8.06 8.12 8.24 10.99 13.74 32.97 57.33
39 62.76 8.27 8.33 8.46 11.28 14.10 33.83 58.83
40 64.37 8.49 8.55 8.68 eT 14.46 34.70 60.34
41 65.98 8.70 8.76 8.89 11.86 14.82 35.57 61.85
42 67.59 8.91 8.97 eilatt 12.15 15.18 36.44 63.36
43 69.20 9.12 Omg F350 12.43 15.54 37.30 64.87
di 70.81 Ia 9.40 9.54 12.72 15.90 38.17 66.38
45 72.42 9.55 9.61 9.76 13.01 16.27 39.04 67.89
46 74.03 9.76 9.83 9.98 13.30 16.63 somo 69.39
47 75.64 evel 10.04 10.19 13.59 16.99 40.77 70.90
48 77.25 10.18 10.26 10.41 13.88 WeSb 41.64 72.41
49 78.86 10.40 10.47 10.63 14.17 ee 42.51 73.92
50 80.47 10.61 10.68 10.84 14.46 18.07 43.38 75.43
51 82.08 10.82 10.90 11.06 14.75 18.43 44.24 76.94
52 83.68 11.03 mal lal 11.28 15.04 18.80 45.11 78.45
53 85.29 11.24 11.32 11.49 15.33 19.16 45.98 79.95
54 86.90 11.46 11.54 STA 15.62 19.52 46.85 81.46
55 88.51 11.67 LD LEO 3 15.90 19.88 47.71 82.97
56 90.12 11.88 11.96 12.15 16.19 20.24 48.58 84.48
57 91.73 12.09 12.18 12.36 16.48 20.60 49.45 85.99
58 93.34 12.30 12.39 12.58 16.77 20.96 50.32 87.50
59 94.95 12.52 12.61 12.80 17.06 21.33 51.18 89.01
60 96.56 12.73 12.82 13.01 17.35 21.69 52.05 90.51

528
ENGLISH STATUTE MILES INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

English ig ‘ : German | Nautical French |Geograph’l ‘
Staruce Kilo- Austrian | Prussian Miles. Leagues. | Leagues. jo? Nautical) Russian
Miles. metres, Miles. Miles. 15=1° Kq. 20=1° Eq. | 95=1° Eq. Miles. Wersts.
60=1° Eq
61 98.17 | 12.94 13.03 13.23 17.64 | 22.05 52.92 92.02
62 99.78 | 13.15 13.25 13.45 17.93 2.41 53.79 93.53
63 101.39 | 13.37 13.46 13.66 18.22 22.77 54.65 95.04
64 102.00 | 13.58 13.67 13.88 18.51 23213 55.52 96.55
65 104.61 | 13.79 13.89 14.10 18.80 23.49 56.39 98.06
66 106.21 | 14.00 14.10 14.31 19.09 23.86 57.26 99.57
67 107.82 | 14.21 14.31 14.53 19.37 24.22 58.12 101.07
-68 109.43 | 14.43 14.53 14.75 19.66 24.58 58.99 102.58
69 111.04 | 14.64 14.74 14.96 19.95 24.94 59.86 104.09
70 112.65 | 14.85 14.96 15.18 20.24 25.30 60.73 105.60
‘a 114.26 | 15.06 15:17 15.40 20.53 25.66 61.59 107.11
72 115.87 | 15.27 15.38 15.62 20.82 26.03 62.46 108.62
73 117.48 | 15.49 15.60 15.83 21.11 26.39 63.33 110.13
74 119.09 | 15.70 15.81 16.05 21.40 26.75 64.20 111.63
75 120.70 || 15.91 16.02 16.27 21.69 27.11 65.06 113.14
76 122.31 | 16.12 16.24 16.48 21.98 27.47 65.93 114.65
77 123.92 | 16.34 16.45 16.70 22.27 27.83 66.80 | 116.16
78 125.53 | 16.55 16.66 16.92 22.56 28.19 67.67 117.67
79 127.14 | 16.76 16.88 173 22.84 28.56 68.53 119.18
80 128:75 | 16.97 17.09 17535 23.13 28.92 69.40 120.69
81 130.35 |. 17:18 1731 17.57 23.42 29.28 70.27 122.19
82 131.96 | 17.40 17.52 17.78 23.71 29.64 71.14 123.70
83 13357 | 17261 Wares} 18.00 24.00 30.00 72.00 125.21
84 135.18 | 17.82 17.95 | 18.22 24.29 30.36 72.87 126.72
85 136.79 | 18.03 18.16 | 18.43 24.58 30.72 73.74 128.23
| 86 138.40 | 18.24 | 18.37 | 18.65 24.87 31.09 74.61 129.74 |
87 140.01 | 18.46 | 18.59 | 18.87 25.16 31.46 75.47 131.25
| 88 141.62 | 18.67 | 18.80 | 19.09 25.45 31.82 76.34 182.75
89 143.23 | 18.88 19.01 | 19.30 25.74 32.18 77.21 184.26
|} 90 144.84 | 19.09 | 19.23 | 19.52 26.03 32.53 78.08 135i vail
91 146.45 | 19.31 | 19.44 | 19.74 26.31 32.89 78.94 137.28 ||
92 148.06 | 19.52 | 19.66 | 19.95 | 26.60 | 33.25 79.81 138.79 ||
iy age WA9.67 | 19273) | W988i 20.17 26.89 33.82 80.68 140.30 ||
94 151.28 | 19.94 | 20.08 20.39 27.18 | 34.18 81.55 141.81 ||
| 95 152.88 | 20.15 | 20.30 20.60 27.47 | 34.54 82.41 143.31 ||
| 96 154.49 | 20.37 | 20.51 | 20.82 | 27.76 | 34.90 | 83.28 | 144.82 ||
Hit a7 156.10 | 20.58 | 20.72 | 21.04 | 28.05 | 35.26 84.15 146.33 |
| 98 TST ||) 20879...) Boreas |) hommes 28.34 | 35.62 85.02 147.84 |,
99 159.32 | 21.00 PAS: | DAA 28.63 | 35.98 85.88 149.35 |||
100 160.93 | 21.21 21.36 21.69 28.92. | 36.15 86.75 150.86 )
|

E 82

529
IX. RUSSIAN WERSTS INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

German | Nautical French |Geosraph’l| English

Russian Kilo- Austrian | Prussian Miles. Leagues. | Leagues, |°F Nautical) Statute
Wersts. | metres. Miles. Miles. | 151° gq. | 20=1° Eq. | 25=1° Kq. Miles. Milent
60=1° Eq.

1,000 | 1066.78 | 140.63 | 141.62 | 143.76 | 191.68 | 239.60 | 575.05 662.88
2,000 | 2133.56 | 281.25 | 283.25 | 287.53 | 383.37 | 479.21 | 1150.10 | 1325.76
3,000 | 3200.34 | 421.88 | 424.87 | 431.29 | 575.05 718.81 | 1725.15 | 1988.64
4,000 | 4267.12 | 562.50 | 566.50 | 575.05 | 766.73 | 958.42 | 2300.20 | 2651.52
5,000 | 5333.90 | 703.13 | 708.12 | 718.81 | 958.42 | 1198.02 | 2875.25 | 3314.39

6,000 | 6400.68 | 843.76 849.74 | 862.58 | 1150.10 | 1437.62 | 3450.30 | 3977.27
7,000 | 7467.47 | 984.38 | 991.37 | 1006.34 | 1341.78 | 1677.23 | 4025.35 | 4640.15
8,000 | 8534.25 | 1125.01 | 1132.99 | 1150.10 | 1533.47 | 1916.83 | 4600.40 | 5303.03
9,000 | 9601.03 | 1265.63 | 1274.62 | 1293.86 | 1725.15 | 2156.44 | 5175.45 | 5965.91
10,000 |10667.81 | 1406.26 | 1416.24 | 1437.62 | 1916.83 | 2396.04 | 5750.50 | 6628.79

100 106.68 14.06 14.16 14.38 19.17 23.96 57.50 66.29
200 213.36 28.13 28.32 28.75 38.34 47.92 | 115.01 | 132.58
300 320.03 42.19 42.49 43.13 57.50 71.88 | 172.51 | 198.86
400 426.71 56.25 56.65 57.51 76.67 95.84 | 230.02 | 265.15
500 533.39 70.31 70.81 71.88 95.84 | 119.80 | 287.52 | 331.44

600 640.07 84.38 84.97 86.26 | 115.01 | 143.76 | 345.03 | 397.73
700 746.75 98.44 99.14 | 100.63 | 134.18 | 167.72 | 402.53 | 464.02

800 853.42 | 112.50 | 113.30 | 115.01 | 153.35 | 191.68 | 460.04 | 530.30
900 960.10 | 126.56 | 127.46 | 129.39 | 172.51 | 215.64} 517.54 | 596.59
1000 | 1066.78 | 140.63 | 141.62 | 143.76 | 191.68 | 239.60 | 575.05 | 662.88
1 1.07 0.14 0.14 0.14 0.19 0.24 0.58 0.66
2 2.13 0.28 0.28 0.29 0.38 0.48 1.15 1.33
3 3.20 0.42 0.42 0.43 0.58 0.72 1.73 199
4 4.27 0.56 0.57 0.58 0.77 0.96 2.30 2.65
5 5.33 0.70 0.71 0.72 0.96 1.20 2.88 3.31
6 6.40 0.84 0.85 0.86 1.15 1.44 3.45 3.98
7 7.47 0.98 0.99 1.01 1.34 1.68 4.03 4.64
8 8.53 1.13 1.13 1S 1.53 1.92 4.60 5.30
9 9.60 1.27 1.27 1.29 1.73 2.16 5.18 5.97
10 10.67 1.41 1.42 1.44 1.92 2.40 5.75 6.63
1G! 11.73 1.55 1.56 1.58 2.11 2.64 6.33 7.29
12 12.80 1.69 1.70 1.73 2.30 2.88 6.90 7:95
13 13.87 1.83 1.84 1.87 2.49 3.11 7.48 8.62
14 14.93 1.97 1.98 2.01 2.68 3.35 8.05 9.28
15 16.00 2.11 2.12 2.16 2.88 3.59 8.63 9.94
16 17.07 2.25 2.27 2.30 3.07 3.83 9.20 10.61
17 18.14 2.39 2.41 2.44 3.26 4.07 9.78 11.27
18 19.20 2.53 2.55 2.59 3.45 4.31 10.35 11.93
19 20.27 2.67 2.69 2.73 3.64 4.55 10.93 12.59
20 21.34 2.81 2.83 2.88 3.83 4.79 11.50 13.26

=

530
RUSSIAN WERSTS INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

German nena French |Geograph’l| pyglish

Russian Kilo- Austrian Prussian ae e eas or Nautical 24,

Wersts. | metres. Miles. Miles. WHO RG Boson. oe onS. egeolee: Beetle
21 22.40 2.95 2.97 3.02 4.03 5.03 12.08 13.92
22 23.47 3.09 3.12 3.16 4.22 5.27 12.65 14.58
23 24.54 3.23 3.26 3:31 4.41 5.51 13.23 15.25
24 25.60 3.38 3.40 3.45 4.60 5.75 13.80 15.91
25 26.67 3.52 3.54 3.59 4.79 5.99 14.38 16.57
26 27.74 3.66 3.68 3.74 4.98 6.23 14.95 17.23
27 28.80 3.80 3.82 3.88 5.18 6.47 15.53 17.90
28 29.87 3.94 3.97 4.03 5.37 6.71 16.10 18.56
29 30.94 4.08 4.11 4.17 5.56 6.95 16.68 19.22

30 32.00 4.22 4.25 4.31 5.75 7.19 17.25 19.89

31 33.07 4.36 4.39 4.46 5.94 7.43 17.83 20.55

32 34.14 4.50 4.53 4.60 6.13 7.67 18.40 21.21
33 35.20 4.64 4.67 4.74 6.33 7.91 18.98 21.88
34 36,27 4.78 4.82 4.89 6.52 8.15 19.55 22.54
35 37.34 4.92 4.96 5.03 6.71 8.39 20.13 23.20
36 38.40 5.06 5.10 5.18 6.90 8.63 20.70 23.86
37 39.47 5.20 5.24 5.32 7.09 8.87 21.28 24.53
38 40.54 5.34 5.38 5.46 7.28 9.10 21.85 25.19
39 41.60 5.48 5.52 5.61 7.48 9.34 22.43 25.85
40 42.67 5.63 5.66 5.75 7.67 9.58 23.00 26.52

41 43.74 5.77 5.81 5.89 7.86 9.82 23.58 27.18

42 44,80 5.91 5.95 6.04 8.05 10.06 24.15 27.84
43 45.87 6.05 6.09 6.18 8.24 10.30 24.73 28.50
44 46.94 6.19 6.23 6.33 8.43 10.54 25.30 29.17
45 48.01 6.33 6.37 6.47 8.63 10.78 25.88 29.83
46 49.07 6.47 6.51 6.61 8.82 11.02 26.45 30.49
47 50.14 6.61 6.66 6.76 9.01 11.26 27.03 31.16
48 51.21 6.75 6.80 6.90 9.20 11.50 27.60 31.82
49 52.27 6.89 6.94 7.04 9.39 11.74 28.18 32.48
50 53.34 7.03 7.08 7.19 9.58 11.98 28.75 33.14
51 54.41 bale E22, 7.33 9.78 12.22 29.33 33.81
52 55.47 7.31 7.36 7.48 9.97 12.46 29.90 34.47
53 56.54 7.45 7.51 7.62 10.16 12.70 30.48 35.13
54 57.61 7.59 7.65 7.76 10.35 12.94 31.05 35.80
55 58.67 7.73 7.79 7.91 10.54 13.18 31.63 36.46
56 59.74 7.88 7.93 8.05 10.73 13.42 32.20 37.12 |
57 60.81 8.02 8.07 8.19 10.93 13.66 32.78 37.78
58 61.87 8.16 8.21 8.34 11.12 13.90 33.35 38.45
59 62.94 8 30 8.36 8.48 11.31 14.14 33.93 39.11
60 64.01 8.44 8.50 8.63 11.50 | 14.38 34.50 39.77

531

RUSSIAN WERSTS INTO DIFFERENT GEOGRAPHICAL MEASURES OF DISTANCE.

Russian
Wersts.

61
62
63
64
65

66
67
68
69
70

71
72
73
74
75

76

r

7

78
79
80

81
82
83
84
85

86
87
88
89
90

91
92

: 4 ‘ German
rieree. (( Miloue | Mmilea: |a eee
65.07 8.58 8.64 8.77
66.14 8.72 8.78 8.91
67.21 8.86 8.92 9.06
68.27 9.00 9.06 9.20
69.34 9.14 9.21 9.34
70.41 9.28 9.35 9.49
71.47 9.42 9.49 9.63
72.54 9.56 9.63 9.78
73.61 9.70 Sere 9.92
74.67 9.84 9.91 10.06
75.74 9.98 10.06 10.21
76.81 10.12 10.20 10.35
77.87 10.27 10.34 10.49
78.94 10.41 10.48 10.64
80.01 10.55 10.62 10.78
81.08 10.69 10.76 10.93
82.14 10.83 10.91 11.07
83.21 10.97 11.05 11.21
84.28 11.11 SE) 11.36
85.34 11.25 T1333 11.50
86.41 ese 11.47 11.64
87.48 HIGHS 11.61 11.79
88.54 11.67 11.75 9S
89.61 11.81 11.90 12.08
90.68 11.95 12.04 12.22
91.74 12.09 12.18 12.36
92.81 12.23 12.32 Sen
93.88 12.38 12.46 12.65
94.94 12.52 12.60 12.79
96.01 12.66 12.75 12.94
97.08 12.80 12.89 13.08
98.14 12.94 13.03 13.23
99.21 13.08 TSsk7 SESW
100.28 13.22 Seo seo
101.34 13.36 13.45 13.66
102.41 13.50 13.60 13.80
103.48 13.64 13.74 13.94
104.55 13.78 13.88 14.09
105.61 13.92 14.02 14,23
106.68 14.06 14.16 14.38

Nautical
Leagues.

11.69
11.88
12.08
12.27
12.46

12.65
12.84
13.03
13.23
13.42

13.61
13.80
13.99
14.18
14.38

14.57
14.76
14.95
15.14
15.33

15.53
15.72
15.91
16.10
16.29

16.48
16.68
16.87
17.06
17.25

17.44
17.63
17.83
18.02
18.21

18.40
18.59
18.78
18.98
Ome

y Leagues,
15=1° Eq. | 20=1° Eq. | 25=1° Eq.

14.62
14.86
15.10
15.33
15.57

15.81
16.05
16.29
16.53
16.77

17.01
17.25
17.49
17.73
17.97

18.21
18.45
18.69
18 93
19.17

19.41
19.65
19.89
20.13
20.37

20.61
20.85
21.09
21.32
21.56

21.80
22.04
22.28
22.52
22.76

23.00
23.24
23.48
23.72
23.96

French |Geograph’l
or Nautical

Miles.

60=1° Eq.

35.08
39.65
36.23
36.80
37.98

37.95
38.53
39.10
39.68
40.25

40.83
41.40
41.98
42.55
43.13

43.70
44.28
44.85
45.43
46.00

46.58
47.15
47.73
48.30
48.88

49.45
50.03
50.60
51.18
51.75

52.33
52.90
53.48
54.05
54.63

55.20
55.78
56.35
56.93
57.50

English
Statute
Miles.

40.44
41.10
41.76
42.42
43.09

43.75
44.41
45.08
45.74
46.40

47.06
47.73
48.39
49.05
49.72

50.38
51.04
51.70
52.37
53.03

53.69
54.36
55.02
55.68
56.34

57.01
57.67
58.33
59.00
59.66

60.32
60.98
61.65
62.31
62.97

63.64
64.30
64.96
65.63
66.29

85

Y MEASURES.

«

COMPARATIVE TABLE OF THE MOST IMPORTANT ITINERAR

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535

CONTENTS.

(The figures refer to the folio at the bottom of the page.)

TABLES FOR COMPARING THE MOST IMPORTANT MEASURES OF GEOGRAPHICAL

SURFACES.

Conversion of the different Surface Measures into each other.

Tage I. Conversion of Square Kilometres into Austrian Square Miles—

6c

66

66

a

‘

Prussian Square Miles—German Square Miles—Nautical Square
Leagues—French Square Leagues—Geographical Square Miles
—English Square Statute Miles—Russian Square Wersts

II. Conversion of Austrian Square Miles into Square Kilometres—

Prussian Square Miles—German Square Miles—Nautical Square
Leagues—French Square Leagues—Geographical Square Miles
—English Square Statute Miles—Russian Square Wersts ‘

III. Conversion of Prussian Square Miles into Square Kilometres—

Austrian Square Miles—German Square Miles—Nautical Square
Leagues—French Square Leagues—Geographical Square Miles
—English Square Statute Miles—Russian Square Wersts :

IV. Conversion of German Square Miles into Square Kilometres—

Austrian Square Miles— Prussian Square Miles — Nautical
Square Leagues—French Square Leagues—Geographical Square
Miles—English Square Statute Miles—Russian Square Wersts

V. Conversion of Nautical Square Leagues into Square Kilometres—

Austrian Square Miles—Prussian Square Miles — German
Square Miles—French Square Leagues—Geographical Square
Miles—English Square Statute Miles—Russian Square Wersts

VI. Conversion of French Square Leagues into Square Kilometres—

Austrian Square Miles—Prussian Square Miles—German Square
Miles—Nautical Square Leagues Geographical Square Miles—
English Square Statute Miles—Russian Square Wersts

— Austrian Square Miles—Prussian Square Miles—German

Square Miles— Nautical Square Leagues— French Square

Leagues—English Square Statute Miles—Russian Square Wersts
89

PAGE

91

94

97

106

103

- 106

VII. Conversion of Geographical Square Miles into Square Kilometres

109

556 CONTENTS.

TaBLE VIII. Conversion of English Square Statute Miles into Square Kilo-
metres—Austrian Square Miles—Prussian Square Miles—
German Square Miles—Nautical Square Leagues—French
Square Leagues — Geographical Square Miles — Russian
Square Wersts . 5 : 3 2

IX. Conversion of Russian Square Biers into Square Kilo-
metres—Austrian Square Miles—Prussian Square Miles—
German Square Miles—Nautical Square Leagues—French
Square Leagues — Geographical Square Miles — English
Square Statute Miles 2

6 X. Table for comparing the most important ‘Measpres of Surface .

ce

“E 90

PAGE

112

115
118

537

i SQUARE KILOMETRES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.
J : German Nautical French Geograph’l English Russian
Sq. Kilo- Austrian Prussian Sq. Miles. Square Square or Nautical Square Square
metres. | Sq. Miles. | Sq. Miles. | j};—)0 Eq. Preece ast a, peote ee Miles. Wersts.
1,000 | 17.37727) 17.62477| 18.16105) 32.28630| 50.4473 290.5767| 386.1161| 878.7183
2,000 | 34.75454 35.24955) 36.32209| 64.57261| 100.8947 581.1534) 772.2323)1757.437
3,000 | 52.13181) 52.87432) 54.48314) 96.85891 151.3420) 871.7302|1158.348 |2636.155
4,000 | 69.50907) 70.49910) 72.64418)129.1452 | 201.7894 1162.307 |1544.464 |3514.873
5,000 | 86.88634) 88.12387| 90.80523/161.4315 haan eee 1930.581 |4393.592
6,000 |104.2636 |105.7486 |108.9663. |193.7178 302.6841 1743.460 2316.697 |5272.310
7,000 |121.6409 123.3734 [127.1273 |226.0041 | 353.1314 2034.037 |2702.813 |6151.028
8,000 |139.0181 |140.9982 )145.2884 |258.2904 403.5788 2324.614 3088.929 |7029.747
9,000 |156.3954 |158.6230 |163.4494 [290.5767 | 454.0261 2615.191 |3475.045 |7908.465
10,000 {173.7727 |176.2477 {181.6105 |322.8630 504.4735 2905.767 3861.161 |8787.183
100 1.74 1.76 1.82 3.23 5.04 29.06 38.61 87.87
200 3.48 3.52 3.63 6.46 10.09 58.12 77.22 175.74
| 300 5.21 5.29 5.45 9.69 15.13 87.17 115.83 263.62
| 400 6.95 7.05 7.26 12.91 20.18 110.23 154.45 351.49
| 500 8.69 8.81 9.08 16.14 25.22 145.29 193.06 439.36
600 10.43 10.57 10.90 19.37 30.27 174.35 231.67 527.23
700 12.16 12.34 12.71 22.60 35.31 203.40 270.28 615.10
800 13.90 14.10 14.53 25.83 40.36 232.46 308.89 702.97
900 15.64 15.86 16.34 29.06 45.40 261.52 347.50 790.85
1000 17.38 17.62 18.16 32.29 50.45 290.58 386.12 878.72
1 0.02 0.02 0.02 0.03 0.05 0.29 0.39 0.88
2 0.03 0.04 0.04 0.06 0.10 0.58 0.77 1.76
3 0.05 0.05 0.05 0.10 0.15 0.87 1.16 2.64
4 0.07 0.07 0.07 0.13 0.20 1.16 1.54 3.51
5 0.09 0.09 0.09 0.16 0.25 1.45 1.93 4.39
6 0.10 0.11 0.11 0.19 0.30 1.74 2.32 5.27
"i 0.12 0.12 0.13 0.23 0.35 2.03 2.70 6.15
8 0.14 0.14 0.15 0.26 0.40 2.32 3.09 7.03
9 0.16 0.16 0.16 0.29 0.45 2.62 3.48 C.o2
10 0.17 0.18 0.18 0.32 0.50 2.91 3.86 8.79
11 0.19 0.19 0.20 0.36 0.55 3.20 4,25 9.67
12 0.21 0.21 0.22 0.39 0.61 3.49 4.63 10.54
13 0.23 | 0.23 0.24 0.42 0.66 3.78 5.02 11.42
14 0.24 0.25 0.25 0.45 0.71 4.07 5.41 12.30
15 0.26 0.26 0.27 0.48 0.76 4.36 5.79 13,18
16 0.28 0.28 0:29 0:52> 0.81 4.65 6.18 14.06
17 0.30 0.30 0.31 0.55 0.86 4.94 6.56 14.94
18 0.31 0.32 0.33 0.58 0.91 5.23 6.95 15.82
19 0.33 0.33 0.35 0.61 0.96 5.52 7.34 16.70
20 0.35 0.35 0.36 0.65 1.01 5.81 7.72 17.57
KE 91

538

SQUARE KILOMETRES INTO DIFFEREN’ GEOGRAPHICAL SQUARE MEASURES.

| Sq. Kilo- | Austrian Prussian Se once Be, pieuse lor Martie eee eae
metres. | Sq. Miles. | Sq. Miles. | 75—j0 Eq. ootrea. boone Goer Miles. Wersts.
21 0.36 0.37 0.38 0.68 1.06 6.10 8.11 18.45
22 0.38 0.39 0.40 0.71 Pat 6.39 8.49 19233
23 0.40 0.41 0.42 0.74 1.16 6.68 8.88 20.21
24 0.42 0.42 0.44 0.77 1.21 6.97 9.27 21.09
25 0.43 0.44 0.45 0.81 1.26 7.26 9.65 21.97
26 0.45 0.46 0.47 0:84: || 1:31 7.55 10.04 | 22.85
27 0.47 0.48 0.49 0.87 1.36 7.85 10.43 23.73
28 0.49 0.49 0.51 0.91) 1.41 8.14 10.81 24.60
29 0.50 0.51 0.53 0.94 1.46 8.43 11.20 25.48
30 0.52 0.53 0.54 0.97 1.51 8.72 11.58 26.36
31 0.54 0.55 0.56 1.00 1.56 9.01 119977, 27.24
32 0.56 0.56 0.58 1.03 1.61 9.30 12.36 28.12
33 0.57 0.58 0.60 1.07 1.66 9359 12.74 29.00
34 0.59 0.60 0.62 1.10 1.72 9.88 13513 29.88
35 0.60 0.62 0.64 113 LEV 10.17 13:51 30.76
36 0.63 0.63 0.65 1316 1.82 10.46 13.90 31.63
37 0.64 0.65 0.67 1.19 1.87 10.75 14.29 32.51
38 0.66 0.67 0.69 1.23 1.92 11.04 14.67 33:39
39 0.68 0.69 0.71 1.26 1397 11.33 15.06 34.27
40 0.70 0.70 0.73 1.29 2.02 11.62 15.44 35.15
41 0.71 0.72 0.74 1.32 2.07 11291 15.83 36.03
42 0.73 0.74 0.76 1.36 2.12 12:20 16.22 36.91
43 0.75 0.76 0.78 1.39 2.17 12.49 16.60 37.78
44 0.76 0.78 0.80 1.42 2.22 12.79 16.99 38.66
45 0.78 0.79 0.82 1.45 2.27 13.08 17.38 39.54
46 0.80 0.81 0.84 1.49 2.32 13.37 17.76 40.42
47 0.82 0.83 0.85 1.52 2.37 13.66 18.15 41.30
48 0.83 0.85 0.87 1.55 2.42 13.95 18.53 42.18
49 0.85 0.86 0.89 1.58 2.47 14.24 18.92 43.06
50 0.87 0.88 0.91 1.61 2.52 14.53 19231 43.94
51 0.89 0.90 0.93 1.65 2.57 14.82 19.69 44.81
52 0.90 0.92 0.94 1.68 2.62 15a 20.08 45.69
53 0.92 0.93 0.96 Leal 2.67 15.40 20.46 46.57
54 0.94 0.95 0.98 1.74 2.72 15.69 20.85 47.45
55 0.96 0.97 1.00 1.78 2.77 15.98 21.24 48.33
56 0.97 0.99 1.02 1.81 2 83 16.27 21.62 49.21
57 0.99 1.00 1.04 1.84 2.88 16.56 22.01 50.09
58 1.01 1.02 1.05 1.87 2.93 16.85 22.39 50.97
59 1.03 1.04 1.07 1.90 2.98 17.14 22.78 51.84
60 1.04 1.06 1.09 1.94 3.03 17.43 23.17 52.72

539.

SQUARE KILOMETRES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

Sq. Kilo-
metres.

61
62
63
64
65

66
67
68
69
70

71
72
73
74
75

76
77
78
79
80

81
82
83
84
85

86
87
88
89
90

91
92
93
94
95

96
97
98
99
100

Austrian
Sq. Miles.

1.06
1.08
1.09
1.11
1.13

1.15
1.16
1.18
1.20
1.22

1.23
1.25
1.27
1.29
1.30

1.32
1.34
1.36
1.37
1.39

1.41
1.42
1.44
1.46
1.48

1.49
1.51
1.53
1.55
1.56

1.58
1.60
1.61
1.63
1.65

1.67
1.69
1.70
72
1.74

Prussian
Sq. Miles.

1.08
1.09
1.11
1.13
1.15

1.16
1.18
1.20
1.22
1.23

1.25
1.27
1.29
1.30
1.32

1.34
1.36
1.37
1.39
1.41

1.43
1.45
1.46
1.48
1.50

1.52
1.53
1.55
1.57
1.59

1.60
1.62
1.64
1.66
1.67

1.69
1.71
1.73
1.74
1.76

German
Sq. Miles.
15=1° Eq.

1.11
1.13
1.14
1.16
1.18

1.20
1.22
1.23
1.25
1.27

1.29
1.31
1.33
1.34
1.36

1.38
1.40
1.42
1.43
1.45

1.47
1.49
1.51
1.53
1.54

1.56
1.58
1.60
1.62
1.63

1.65
1.67
1.69
1.71
1.73

1.74
1.76
1.78
1.80
1.82

Nautical French
Square Square
Leagues. | Leagues.

20=1° Eq. | 25=1° Eq.
1.97 3.08
2.00 sels
2.03 3.18
2.07 3.23
2.10 3.28
2013 3.33
2.16 3.38
2.20 3.43
2.23 3.48
2.26 3103
2.29 3.58
2.32 3.63
2.36 3.68
2.39 3.73
2.42 3.78
2.45 3.83
2.49 3.88
2.52 3.93
2.55 3.99
2.58 4.04
2.62 4.09
2.65 4.14
2.68 4.19
2.71 4.24
2.74 4.29
2.78 4.34
2.81 4.39
2.84 4.44
2.87 4.49
2.91 4.54
2.94 4.59
2.97 4.64
3.00 4.69
3.03 4.74
3.07 4.79
3.10 4.84
3.13 4.89
3.16 4.94
3.20 4.99
3.23 5.04

93

| Sq. Miles.

17.72
18.02
18.31
18.60
18.89

19.18
19.47
19.76
20.05
20.34

20.63
20.92
21.21
21.50
21.79

22.08
22.37
22.66
22.96
23.25

23.54
23.83
24.12
24.41
24.70

24.99
25.28
25.57
25.86
26.15

26.44
26.73
27.02
27.31
27.60

27.90
28.19
28.48
28.77
29.06

60=1° Eq. |

\Geograph’l | ;
or Nautical Engel

Square
Miles.

23.55
23.94
24.33
24.71
25.10

25.48
25.87
26.26
26.64
27.03

27.41
27.80
28.19
28.57
28.96

29.34
29.73
30.12
30.50
30.89

31.28
31.66
32.05
32.43
32.82

33.21
33.59
33.98
34.36
34.75

35.14
35.52
35.91
36.29
36.68

37.07
37.45
37.84
38.23
38.61

Russian
Square
Wersts.

53.60
54.48
55.36
56.24
57.12

58.00
58.87
59.75
60.63
61.51

62.39
63.27
64.15
65.03
65.90

66.78
67.66
68.54
69.42
70.30

71.18
72.05
72.93
73.81
74.69

75.57
76.45
77.33
78.21
79.08

79.96
80.84
81.72
82.60
83.48

84.36
85.24
86.11
86.99
87.87

540

II. AUSTRIAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

|

Russian
Square
Wersts.

50567.11
101134.2
151701.3
202268.5
252835.6

303402.7
353969.8
404536.9
455104.0

German Nautical French (Geograph’l| English
Austrian | Sq. Kilo- Prussian Sq. Miles. Square Square jor Nautical! square
Sq. Miles.) metres. | Sq. Miles. | 15—10 Eq, Leagues. | Leagues. | Sq. Miles. Miles.
20=1° Eq. | 25=1° Eq. | 60=1° Eq.
1,000 | 57546.44) 1014.243] 1045.104) 1857.962| 2903.066) 16721.66) 22219.61
2,000 |115092.9 | 2028.486) 2090.207| 3715.924| 5806.131) 33443.31| 44439.22
3,000 |172639.3 | 3042.729] 3135.311| 5573.886] 8709.197) 50164.97| 66658.83
4,000 |230185.8 | 4056.972| 4180.414) 7431.848/11612.26 | 66886.63] 88878.44
5,000 |287732.2 | 5071.216| 5225.518| 9289.810/14515.33 | 83608.29/111098.0
6,000 |345278.7 | 6085.459) 6270.622)11147.77 |17418.39 |100329.9 |133317.7
7,000 |402825.1 | 7099.702| 7315.725)13005.73 |20321.46 |117051.6 |155537.3
8,000 |460371.5 | 8113.945) 8360.829|14863.70 |23224.52 |133773.3 |177756.9
9,000 |517918.0 | 9128.188) 9405.932)16721.66 |26127.59 |150494.9 |199976.5
10,000 |575464.4 |10142.43 |10451.04 |18579.62 |29030.66 |167216.6 |222196.1
100 | 5754.64 | 101.42} 104.51 185.80 | 290.31 1672.17| 2221.96
200 |11509.29 202.85 209.02 371.59 580.61 3344.33) 4443.92
300. |17263.93 | 304.27 | 313.53 | 557.39 870.92 | 5016.50) 6665.88
400 |23018.58 | 405.70 | 418.04 743.18 | 1161.23 6688.66] 8887.84
500 |28773.22 507.12 522.55 928.98 | 1451.53 8360.83} 11109.80
600 |34527.87 608.55 | 627.06 | 1114.78 | 1741.84 | 10032.99) 13331.77
700 |40282.51 709.97 731.57 | 1300.57 | 2032.15 | 11705.16| 15553.73
800 |46037.15 811.39 | 836.08 | 1486.37 | 2322.45 | 13377.33) 17775.69
900 |51791.24 | 912.82 940.59 | 1672.17 | 2612.76 | 15049.49] 19997.65
1000 |57546.44 | 1014.24 | 1045.10 | 1857.96 | 2903.07 | 16721.66] 22219.61
1 57.55 1.01 1.05 1.86 2.90 16.72 22.22
2 115.09 2.03 2.09 3.72 5.81 33.44 44,44
3 172.64 3.04 3.14 5.57 8.71 50.16 66.66
4 230.19 4.06 4.18 7.43 11.61 66.89 88.88
5 287.73 5.07 5.23 9.29 14.52 83.61 111.10
6 345.28 6.09 6.27 11.15 17.42 100.33} = 133.32
7 402.83 7.10 7.32 13.01 20.32 117.05 155.54
8 460.37 8.11 8.36 14.86 23.22 133.77 177.76
9 517.92 9.13 9.41 16.72 26.13 150.49 199.98
10 575.46 10.14 10.45 18.58 29.03 167.22 222.20
11 633.01 11.16 11.50 20.44 31.93 183.94 244.42
12 690.56 12.17 12.54 22.30 34.84 200.66 266.64
AS 748.10 13.19 13.59 24.15 37.74 217.38 288.85
14 805.65 14,20 14.63 26.01 40.64 234.10 311.07
15 863.20 15.21 15.68 27.87 43.55 250.82 333.29
16 920.74 16.23 16.72 29.73 46.45 267.55 355.51
17 978.29 17.24 LAT 31.59 49.35 284.27 377.75
18 1035.83 18.26 18.81 33.44 52.26 300.99 399.95
19 1093.38 19127 19.86 35.30 55.16 317.7] 422.17
20 1150.93 20.28 20.90 37.16 58.06 334.42 444,39
E 94

505671.1

5056.72
10113.42
15170.13
20226.85
25283.56

30340.27
35396.98
40453.69
45510.40
50567.11

50.57
101.13
151.70
202.27
252.84

303.40
353.97
404.54
455.10
505.67

556.24
606.81

657.37|

707.94
758.51

809.07
859.64
910.21
960.78
1011.34

541

AUSTRIAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES,

: ; German Nautical French Geograph’] English Russian

Austrian | Sq. Kilo- | Prussian | gq Miles, | Square Square jor Nautical Square Square
Sq. Miles.| metres. | Sq. Miles, | y5j0 Eq. poems oe abe: Miles. Wersts.
21 1208.48 21.30 21.95 39.02 60.96 351.15 466.61 | 1061.91
22 1266.02 22.31 22.99 40.88 63.87 367.88 488.83 | 1112.48
23 1323.57 23.33 24.04 42.73 66.77 384.60 511.05 | 1163.04
24 1381.11 24.34 25.08 44.59 69.67 401.32 533.27 | 1213.61
25 1438.66 25.36 26.13 46.45 72.58 418.04 555.49 | 1264,18
26 1496.21 26.37 27.17 48.31 75.48 434.76 577.71 | 1314.74
a Baan 10 27.38 28.22 50.16 78.38 451.48 599-93) |) 1365531
28 1611.30 28.40 29.26 52.02 81.29 468.21 622.15 | 1415.88
29 1668.85 29.41 30.31 53.88 84.19 484.93 644.37 | 1466.45
30 1726.39 30.43 SLSD 55.74 87.09 501.65 666.59 | 1517.01
om 1783.94 31.44 32.40 57.60 90.00 518.37 688.81 | 1567.58
32 1841.49 32.46 33.44 59.45 92.90 535.09 711.03 | 1618.15
33 1899.03 33.47 34.49 631 95.80 551.81 733.25. | 1668.71
34 1956.58 34.48 SEIS 63.17 98.70 568.54 755.47 | 1719.28
30 2014.13 35.50 36.58 65.03 101.61 585.26 777.69 | 1769.85
36 2071.67 36.51 37.62 66.89 104.51 601.98 799.91 | 1820.42
37 2129.22 3108 38.67 68.74 107.41 618.70 $22.13 | 1870.98
38 2186.76 38.54 So ak 70.60 110.32 635.42 844.35 | 1921.55
39 2244.31 39.56 40.76 72.46 113.22 652.14 866.56 | 1972.12
40 « | 2301.86 40.57 41.80 74.32 116.12 668.87 888.78 | 2022.68
Al 2359.40 41.58 42.85 76.18 119.03 685.59 | 911.00 | 2073.25
42 2416.95 42.60 43.89 78.03 121.93 702.31 | 933.22 | 2123.82
43 2474.50 43.61 44.94 79.89 124.83 719.03 955.44 | 2174.39
44 2532.04 44.63 45.98 81.75 127.73 7135.75 977.66 | 2224.95
45 2589.59 45.64 47.03 83.61 130.64 752.47 999.88 | 2275.52
46 2647.14 46.66 48.07 85.47 133.54 769.20 | 1022.10 | 2326.09
47 2704.68 47.67 49.12 87.32 136.44 785.92 | 1044.32 | 2376.65
48 = | 2762.23 48.68 50.16 89.18 139.35 802.64 | 1066.54 | 2427.22
A9 2819.78 49.70 51.21 91.04 142.25 819.36 | 1088.76 | 2477.79
50 2877.32 50.71 52.25 92.90 145.15 836.08 | 1110.98 | 2528.36
51 2934.87 Hilarie 53.30 94.76 148.06 852.80 | 1133.20 | 2578.92
52 2992.42 52.74 54.34 96.61 150.96 869.53 | 1155.42 | 2629.49
53 3049.96 53.75 55.39 98.47 153.86 886.25 | 1177.64 | 2680.06
54 3107.51 54.77 56.44 100.33 156.77 902.97 | 1199.86 | 2730.62
55 3165.05 55.78 57.48 102.19 159.67 919.69 | 1222.08 | 2781.19 '
56 3222.60 56.80 58.53 104.05 162.57 936.41 | 1244.30 | 2831.76
Bi 3280.15 57.81 59-57 105.90 165.47 953.13 | 1266.52 | 2882.33
58° *. | 3337.69 58.83 60.62 107.76 168.38 969.86 | 1288.74 | 2932.89
59 3395.24 59.84 61.66 109.62 171.28 986.58 | 1310.96 | 2983.46
60 + | 3452.79 60.85 62.71 111.48 174.18 | 1003.30 | 1333.18 | 3034.03

E 95

542

AUSTRIAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES,

ow

Austrian
Sq. Miles.

61
62
63
64
65

66
67
68
69
70

71
72
73
74
75

76
77
78
79
80

81
82
83
84
85

86
87
88
89
90

ot
92
93
94
95

96
97
98
99
100

Sq. Kilo-
metres,

3510.33

3567.88
3625.43
3682.97
3740.52

3798.07
3855.61
3913.16
3970.70
4028.25

4085.80
4143.34
4200.89
4258.44
4315.98

4373.53
4431.08
4488.62
4546.17
4603.72

4661.26
4718.81
4776.35
4833.90
4891.45

4948.99
5006.54
5064.09
5121.64
5179.18

5236.73
5294.27
5351.82
5409.37
5466.91

5524.46
5582.00
5639.55
5697.10
5754.64

Prussian
Sq. Miles.

61.87
62.88
63.90
64.91
65.93

66.94
67.95
68.97
69.98
71.00

72.01
73.03
74.04
75.05
76.07

77.08
78.10
79.11
80.13
81.14

82.15
83.17
84.18
85.20
86.21

87.22
88.24
89.25
90.27
91.28

92.30
93.31
94.32
95.34
96.35

97.37
98.38
99.40
100.41
101.42

French |Geograph’l

German Nautical
Sq. Miles. | een te. see
ee ae ee 20-19 Eq. 25=1° Eq.
63.75 113.34 177.09
64.80 115.19 180.00
65.84 117.05 182.89
66.89 118.91 185.80
67.93 120.77 188.70
68.98 122.63 191.60
70.02 124.48 194.51
71.07 126.34 197.41
72.11 128.20 200.31
73.16 130.06 203.21
74.20 £31791 206.12
75.25 133.77 209.02
76.29 135.63 211.92
77.34 137.49 214.83
78.38 139.35 217.73
79.43 141.20 220.63
80.47 143.06 223.54
81.52 144.92 226.44
82.56 146.78 229.34
83.61 148.64 232.25
84.65 150.49 235.15
85.70 152.35 238.05
86.74 154.21 240.95
87.79 156.07 243.86
88.83 157293 246.76
89.88 159.78 249.66
90.92 161.64 252.57
SEO 7 163.50 255.47
93.01 165.36 258.37
94.06 167.22 261.28
95.10 169.07 264.18
96.15 170.93 267.08
97:19 172.79 269.99
98.24 174.65 272.89
99.28 176.51 275.79
100.33 178.36 278.69
101.38 180.22 281.60
102.42 182.09 284.50
103.47 183.94 287.40
104.51 185.80 290.31

or Nautical
Sq. Miles.
60=1° Eq

1020.02
1036.74
1053.46
1070.19
1086.91

1103.63
1120.35
1137.07
1153.79
1170.52

1187.24
1203.96
1220.68
1237.40
1254.12

1270.85
1287.57
1304.29
1321.01
1337.73

1354.45
1371.18
1387.90
1404.62
1421.34

1438.06
1454.78
1471.51
1488.23
1504.95

1521.67
1538.39
1555.11
1571.84
1588.56

1605.28
1622.00
1638.72
1655.44
1672.17

English
Square
Miles.

1355.40

1377.62
1399.84
1422.05
1444.27

1466.49
1488.71
1510.93
1533.15
1555.37

1577.59
1599.81
1622.03
1644.25
1666.47

1688.69
1710.91
1733.13
1755.35
1777.57

1799.79
1822.01
1844.23
1866.45
1888.67

1910.89
1933.11
1955.33
1977.55
1999.76

2021.98
2044.20
2066.42
2088.64
2110.86

2133.08
2155.30
2177.52
2199.74
2221.96

3084.59

Russian
Square
Wersts.

3135.16
3185.73
3236.30
3286.86

3337.43
3388.00
3438.56
3489.13
3539.70

3590.27
3640. 83
3691.40
3741.97

3792.53 ||

3843.10
3893.67

3944.23
3994.80
4045.37

4095.94
4146.50
4197.07
4247.64
4298.20

4348.77
4399.34
4449.91
4500.47
4551.04

4601.61

4652.17.
4702.74
4753.31
4803.88

4854.44
4905.01
4955.58
5006.14
5056.72

96

543

III. PRUSSIAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

eaoasien Ba ene eS gq. Miles. “Square “Square or Nabe aga eee |
1,000 | 56738.31| 985.957) 1030.427| 1831.870| 2862.297| 16486.33| 21907.58) 49857.01
2,000 |113476.6 | 1971.914| 2060.854) 3663.741| 5724.595| 32973.66| 43815.16| 99714.19
3,000 |170214.9 | 2957.871) 3091.281! 5495.611| 8586.892' 49460.50| 65722.73)149571.3
4,000 |226953.3 | 3943.828) 4121.709| 7327.482/11449.19 | 65947.34| 87630.31/199428.4 ||
5,000 |283691.6 | 4929.785) 5152.136) 9159.353)14311.49 | 82434.17/109537.9 |249285.5
|
6,000 |340429.9 | 5915.742) €182.563)10991.22 |17173.78 | 98921.00/131445.5 |299142.6
7,000 |397168.2 | 6901.698) 7212.990/12823.09 |20036.08 |115407.8 |153353.0 |348999.7
8,000 |453906.5 | 7887.655| 8243.417 14654.96 |22898.38 |131894.7 |175260.6 |398856.8 ||
9,000 |510644.8 | 8873.612) 9273.844/16486.83 |25760.68 |148381.5 |197168.2 |448713.9
10,000 |567383.1 | 9859.569|10304.271/18318.70 |28622.97 |164868.3 |219075.8 |498571.0 ||
100 5673.83} 98.60 | 103.04 | 183.19 | 286.23 | 1648.68] 2190.76) 4985.70 |
200 | 11347.66) 197.19 206.09 366.37 | 572.46 | 3297.37] 4381.52) 9971.42)
300 | 17021.49| 295.79 | 309.13 | 549.56 | 858.69 | 4946.05) 6572.27| 14957.13}|
400 | 22695.33) 394.38 | 412.17 732.75 | 1144.92 | 6594.73} 8763.03) 19942.84 |
500 | 28369.16) 492.98 515.21 915.94 | 1431.15 8243.41| 10953.79| 24928.55),
600 | 34042.99) 591.57 618.26 | 1099.12 | 1717.38 | 9892.10} 13144.55| 29914.26
700 | 39716.82| 690.17 | 721.30 | 1282.31 | 2003.61 | 11540.78] 15335.30| 34899.97/
800 | 45390.65} 788.77 | 824.34 | 1465.50 | 2289.84 | 13189.47| 17526.06| 39885.6s)
900 | 51064.48) 887.36 | 927.38 | 1648.68 | 2576.07 | 14838.15) 19716.82) 44871.39):
1000 | 56738.31} 985.96 | 1030.43 | 1831.87 | 2862.30 | 16486.83) 21907.58 49857.01),
1 56.74 0.99 1.03 1.83 2.86 16.49 21.91 49.86),
2 113.48 1.97 2.06 3.66 5.72 32.97 43.82 99.71)
3 170.21 2.96 3.09 5.50 8.59 49.46 65.72} 149.57!
4 226.95 3.94 4.12 7.33 11.45 65.95 87.63 199.43)
5 283.69 4.93 5.15 9.16 14.31 82.43} 109.54 249.28)
6 340.43 5.92 6.18 10.99 PAT 98.92} 131.45); 299.14)
7 397.17 6.90 7.21 12.82 20.04 115.41 153.35 349.00)
8 453.91 7.89 8.24 14.65 22.90 131.89} 175.26) 398.86
9 510.64 8.87 9.27 16.49 25.76 148.38} 197.17) 448.71)
10 567.38 9.86 10.30 18.32 28.62 164.87| 219.08) 498.57),
11 624.12} 10.85 11.33 20.15 31.49 181.36) 240.98) 548.43)
12 680.86} 11.83 12.37 21.98 34.35 197.84) 262.89) 598.29)
13 737.60} 12.82 13.40 23,81 37.21 214.33) 284.80) 648.14)
14 794.34) 13.80 14.43 25.65 40.07 231.82; 306.71) 698.00
15 851.07} 14.79 15.46 27.48 42.93 247.30} 328.61) 747.86
16 907.81 15.78 16.49 29.31 45.80 263.79} 350.52) 797.71),
17 964.55) 16.76 17.52 31.14 48.66 280.28) 372.43) 847.57)’
18 1021.29) = 17.75 18.55 32.97 51.52 296.76) 394.34 897.43,
19 1078.03] 18.73 19.58 34.81 54.38 313.25} 416.24 947.25
| 20 1134.77} 19.72 20.61 36.64 57.25 329.74; 438.15; 997.14)
E 97

544
PRUSSIAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

Progran | Sa, Ko | Aaran | Gain, | Sanare | Sauare [or Nuwteat Eegaey | ee

Sq. Miles.) metres, | Sq. Miles. | ]5—)0 kg, pee eora one Miles. Worsts.
21 1191.50 20.71 21.64 38.47 60.11 346.22 460.06 | 1047.00
22 1248.24 | 21.69 22.67 40.30 62.97 | 362.71 | 481.97 | 1096.86
23 1304.98 | 22.68 23.70 42.13 65.83 | 379.20 | 503.87 | 1146.71
24 1361.72 | 23.66 24.73 43.96 68.70 | 395.68 | 525.78 | 1196.57
25 1418.46 | 24.65 25.76 45.80 71.56 | 412.17 | 547.69 | 1246.43
26 1475.20 | 25.63 26.79 A7.63 74.42.) 428.66 | 569.60 | 1296.28
27 1531.93 26.62 27.82 49.46 77.28 445.14 591.50 | 1346.14
28 1588.67 27.61 28.85 51.29 80.14 461.63 613.41 | 1396.00
29 1645.41 28.59 29.88 53.12 83.01 478.12 635.32 | 1445.85
30 1702.15 | 29.58 30.91 54.96 85.87 | 494.61 | 657.23 | 1495.71
31 1758.89 | 30.56 31.94 56.79 88.73 | 511.09 | 679.13 | 1545.57 ||
32 1815.63 31.55 32.97 58.62 91.59 527.58 701.04 | 1595.43
33 1872.36 | 32.54 34.00 60.45 94.46 | 544.07 | 722.95 | 1645.28
34 1929.10 33.52 35.03 62.28 97.32 560.55 744.86 | 1695.14

35 1985.84 | 34.51 36.06 64.12 100.18 | 577.04 | 766.77 | 1745.00

36 2042.58 | 35.49 37.10 65.95 103.04 | 593.53 | 788.67 | 1794.85
37 2099.32 | 36.48 38.13 67.78 105.91 610.01 | 810.58 | 1844.71
38 2156.06 | 37.47 39.16 69.61 108.77 626.50 | 832.49 | 1894.57
39 2212.79 | 38.45 40.19 71.44 111.63 | 642.99 | 854.40 | 1944.42
40 2269.53 | 39.44 41.22 13.27 114.49 659.47 | 876.30 | 1994.28

41 2326.27 | 40.42 42.25 wos 117.35 675.96 | 898.21 | 2044.14
42 2383.01 | 41.41 43.28 76.94 120.22 | 692.45 | 920.12 | 2094.00
43 2439.75 | 42.40 44.31 78.77 123.08 | 708.93 | 942.03 | 2143.85
44 2496.49 | 43.38 45.34 80.60 125.94 | 725.42 | 963.93 | 2193.71
45 2553.22 | 44.37 46.37 82.43 128.80 | 741.91 | 985.84 | 2243.57

46 2609.96 | 45.35 47.40 84.27 131.67 | ‘758.39 | 1007.75 | 2293.42
47 2666.70 | 46.34 48.43 86.10 134.53 | 774.88 | 1029.66 | 2343.28
48 2723.44 | 47.33 49.46 87.93 137.39 791.37 | 1051.56 | 2393.14
49 2780.18 | 48.31 50.49 89.76 140.25 | 807.85 | 1073.47 | 2443.00
50 2836.92 | 49.30 51.52 91.59 143.11 | 824.34 | 1095.38 | 2492.85

51 2893.65 | 50.28 52.55 93.43 145.98 |} 840.83 | 1117.29 | 2542.71
52 2950.39 51.27 53.58 95.26 148.84 | 857.32 | 1139.19 | 2592.57
53 3007.13 | 52.26 54.61 97.09 151.70 | 873.80 | 1161.10 | 2642.42
54 3063.87 | 53.24 55.64 98.92 154.56 | 890.29 | 1183.01 | 2692.28
55 3120.61 54.23 56.67 | 100.75 157.43 | 906.78 | 1204.92 | 2742.14

56 3177.35 55.21 57.70 | 102.58 160.29 923.26 | 1226.82 | 2791.99
57 3234.08 | 56.20 58.73 | 104.42 163.15 | 939.75 | 1248.73 | 2841.85
58 3290.82 | 57.19 59.76 | 106.25 166.01 | 956.24 | 1270.64 | 2891.71
59 3347.56 | 58.17 60.80 | 108.08 168.88 | 972.72 | 1292.55 | 2941.56
60 3404.30 | 59.16 61.83 «| 109.9% 171.74 | 989.21 | 1314.45 | 2991.42

Sq. Miles.

545

PRUSSIAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES,

Prussian

61
62
63
64
65

66
Grits
68
69
70

76
77
78
79
80

81
82
83
84
85°

Nautical
eg, ilo | Aone [equ liee | Snare
* | 20=1° Kq.
3461.04 | 60.14 | 62.86 111.74
3517.78 | 61.13 63.89 113.58
3574.51 | 62.12 64.92 | 115.41
3631.25 | 63.10 65.95 | 117.24
3687.99 | 64.09 66.98 | 119.07
3744.73 | 65.07 68.01 120.90
3801.47 | 66.06 69.04 | 122.74
3858.21'| 67.05 70.07 | 124.57
3914.94 | 68.03 71.10 126.40
3971.68 | 69.02 72.13 128.23
4028.42 |. 70.00 | 73.16 | 130.06
4085.16 | 70.99 74.19 131.89
4141.90 | 71.97 75.22 | 133.73
4198.64 | 72.96 76.25 135.56
4255.37 | 73.95 | 77.28 137.39
4312.11 | 74.93 78.31 139.22
4368.85 | 75.92 | 79.34 | 141.05
4495.59 | 76.90 80.37 | 142.89
4482.33 | 77.89 81.40 | 144.72
4539.07 | 78.88 82.43 | 146.55
4595.80 | 79.86 83.46 148.38
4652.54 | 80.85 84.50 150.21
4709.28 | 81.83 85.53 152.05
4766.02 | 82.82 86.56 153.88
4822.76 | 83.81 -| 87.59 155.71
4879.49 | 84.79 88.62 | 157.54
4936.23 |, 85.78 89.65 159.37
4992.97 | 86.76 | 90.68 161.20
5049.71 | 87.75 gi.7% |‘ 163.04
5106.45 | 88.74 | 92.74 | 164.87
5163.19 | 89.72 93.77 166.70
5219.92 | 90.71 94.80 | 168.53
5276.66 | 91.69 95.83 | 170.36
5333.40 | 92.68 96.86 | 172.20
5390.14 | 93.67 97.89 174.03
5446.88 | 94.65 98.92 | 175.86
5503.62 | 95.64 | 99.95 177.69
5560.35 | 96.62 | 100.98 | 179.52
5617.09 | 97.61 | 102.01 181.36
5673.83 | 98.60 | 103.04

183.19

French
Square
Leagues.

25=1° Eq.

Geograph’1
or Nauticai
Sq. Miles.
60=1° Eq.

English
Square
Miles.

. Russian
Square
Wersts,

174.60
177.46
180.32
183.19
186.05

188.91
Oa
194.64
197.50
200.36

203.22
206.09
208.95
211.81
214.67

217.53
220.40
223.26
226.12
228.98

231.85

234.71
237.57
240.43
243.30

246.16
249.02
251.88

254.74
257.61

260.47
263.33
266.19
269.06
271.92

274.78
277.64
280.51
283.37
286.23

1005.70
1022.18
1038.67
1055.16
1071.64

1088.13
1104.62
1121.10
1137.59
1154.08

1170.57
1187.05
1203.54
1220.03
1236.51

1253.00 |

1269.49
1285.97
1302.46
1318.95

1335.43
1351.92
1368.41
1384.89
1401.38

1417.87
1434.35
1450.84
1467.33
1483.81

1500.30
1516.79
1533.28
1549.76
1566.25

1582.74
1599.22
1615.71
1632.20
1648.68

1336.36

1358.27 |

1380.18
1402.08
1423.99

1445.90
1467.81
1489.72
1511.62
1533.53

1555.44

1577.35
1599.25
1621.16
1643.07

1664.98
1686.88
1708.79
1730.80
1752.61

1774.51

1796.42
1818.33
1840.24
1862.14

1884.05
1905.96
1927.87
1949.77
1971.68

1993.59
2015.50
2037.40
2059.31
2081.22

2103.13
2125.04
2146.94
2168.85
2190.76

99

3041.28
3091.13
3140.99
3190.85
3240.71

3290.56
3340.42
3390.28
3440.13
3489.99

3539.85
3589.71
3639.56
3689.42
3739.28

3789.13
3838.99
3888.85
3938.70
3988.56

4038.42
4088.28
4138.13
4187.99
4237.85

4287.70
4337.56

4387.42 |

4437.27
4487.13

4536.99
4586.85
4636.70
4686.56
4736.42

4786.27
4836.13
4885.99
4935.84
4985.71

546

IV. GERMAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

48384.79

Russian
Square
Wersts.

96769.57
145154.4
193539.1
241923.9

290308.7
338693.5
387078.3
435463.1 |
483847.9

4838.48
9676.96
14515.44
19353.91
24192.39

29030.87
33869.35
38707.83
43546.31

Se Miles, Sq. Kilo- | Austrian | Prussian Tenet. Bacare oe Naa ee aee

10=1°9 Eq.) metres. | Sq. Miles. | Sq. Miles. poge Pond | agi Miles.
1,000 | 55062.91) 956.8429) 970.4713) 1777.778) 2777.778) 16000.00| 21260.68
2,000 (110125.8 |1913.686 |1940.943 | 3555.556) 5555.556) 32000.00| 42521.35
3,000 165188.7 |2870.529 |2911.414 | 5333.333] 8333.333] 48000.00| 63782.03
4,000 |220251.6 |3827.372 |3881.885 | 7111.111)11111.111} 64000.00) 85042.71
5,000 |275314.5 |4784.215 |4852.357 | 8888.889/13888.89 | 80000.00)106303.4
6,000 |330377.4 |5741.058 |5822.828 |10666.67 |16666.67 | 96000.00|127564.1
7,000 |385440.4 |6697.901 |6793.299 |12444.44 |19444.44 |112000.0 |148824.7
8,000 |440503.3 |7654.744 |7763.771 |14222.22 |22222.22 |128000.0 |170085.4
9,000 |495566.2 |8611.586 |8734.242 |16000.00 |25000.00 |144000.0 |191346.1
10,000 |550629.1 |9568.429 |9704.713 |17777.78 |27777.78 |160000.0 |212606.8
100 5506.29} 95.68 97.05 177.78 277.78 1600.00; 2126.07
200 } 11012.58} 191.37 194.09 355.56 555.56 3200.00) 4252.14
300 16518.87} 287.06 | 291.14 533.33-| 833.33. | 4800.00) 6378.20
400 | 22025.16) 382.74 | 388.19 711.11 | 1111.11 | 6400.00) 8504.27
500 | 27531.45) 478.42 | 485.24 888.89 | 1388.89 8000.00) 10630.34
600 | 33037.74] 574.11 582.28 1066.67 | 1666.67.| 9600.00) 12756.41
700 | 38544.04) 669.79 679.33 | 1244.44 | 1944.44 | 11200.00) 14882.47
800 | 44050.33) 765.47 776.38 1422.22 | 2222.22 | 12800.00) 17008.54
900 | 49556.62| 861.16 873.42 1600.00 | 2500.00 | 14400.00) 19134.61
1000 | 55062.91) 956.84 | 970.47 | 1777.78 | 2777.78 | 16000.00| 21260.68
1 55.06) 0.96 0.97 1.78 2.78 16.00 21.26
2 110.13) = 1.91 1.94 3.56 5.56 32.00 42.52
Dl 165.19} 2.87 2.91 5.33 8.33 48.00 63.78
4 220.25 3.83 3.88 Coad SL 64.00 85.04
5 275.31) 4.78 4.85 8.89 13.89 80.00) 106.30
6 330.38} 5.74 5.82 10.67 16.67 96.00} 127.56
7 385.44) 6.70 6.79 12.44 19.44 112.00) 148.82
8 440.50) 7.65 7.76 14.22 22.22 128.00) 170.09
9 495.57 8.61 8.73 16.00 25.00 144.00) = 191.35
10 550.63) 9.57 9.70 17.78 27.78 160.00) 212.61
11 605.69} 10.53 10.68 19.56 30.56 176.00) 233.87
12 660.75) 11.48 11.65 21.33 33.33 192.00} 255.13
13 715.82\ 12.44 12.62 23.11 36.11 208.00) 276.39
14 770.88] 13.40 13.59 24.89 38.89 224.00) 297.65
15 825.94) 14.35 14.56 26.67 41.67 240.00} 318.91
16 .881.01| 15.31 15.52 28.44 44.44 256.00) 340.17
17 936.07; 16.27 16.50 30.22 47.22 272.00} 361.43
18 991.13] 17.22 17.47 32.00 50.00 288.00} | 382.69
19 1046.20) 18.18 18.44 33.78 52.78 304.00} 403.95
20 1101.26, 19.14 19.41 35.56 55.56 320.00} 425.21

E 100

48384.79

48.38
96.77
145.15
193.54
241.92

290.31
338.69
387.08
435.46
483.85

532.23
580.62
629.00
677.39
725.77

774.16
822. 54
870.93
919.31]
967.70

547

GERMAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

Nautical

siete | See | eras | arenes | eae
20=1° Eq.

21 1156.32 | 20.09 Bowes |) Vana
22 | 1211.38 | 21.05 21.35 39.11
23 =| 1266.45 | 22.01 22.32 | 40.89
24 1321.51 | 22.96 23.29 42.67
25 1376.57 | 23.92 | 24.26 | 44.44
26 1431.64 | 24.88 | 25.93 | 46.22
27 1488.70 | 25.83 | 26.20 | 48.00
28 1541.76 | 26.79 DTT =| T49878
29 1596.82 | 27.75 98.14 | 51.56
30 1651.89 | 28.71 29.11 53.33
31 1706.95 | 29.66 30.08 55.11
32 1762.01 |} 30.62 | 31.06 56.89
33 1817.08 | 31.58 32.03 58.67
34° | 1872,14 | 32.53 33.00 60.44
35 1927.20 | 33.49 34.00 62.22
36 1982.26 | 34.45 | 34.94 | 64.00
37 2037.33 | 35.40 35.91 65.78
38 2092.39 | 36.36 36.88 67.56
39 2147.45 | 37.32 37.85 69.33
40 | 2202.52 | 38.27 38.82 | 71.11
Al 2257.58 | 39.23 39.79 72.89
42 2312.64 | 40.19 40.76 74.67
43 2367.70 | 41.14. | 41.73 76.44
44 | 2499.76 | 42.10 | 42.70 78.22
45 2477.83 | 43.06 | 43.67 80.00
46 2532.89 | 44.01 | 44.64 | 81.78
47 2587.96 | 44.97 | 45.61 83.56
| 48 | 2642.02! 45.93 | 46.58 | 95.33
49 2698.08 | 46.89 47.55 87.11
50 2753.14 | 47.84 | 48.52 88.89
51 2808.21 | 48.80 | 49.49 90.67
52 | 2863.27 | 49.76 50.46 92.44
53 2918.33 | 50.71 51.43 94.22
54 | 2973.40! 51.67 52.41 96.00
55 3029.46 | 52.63 | 53.36 97.78
56 | 3083.52 | 53.58 54.35 99.56
57 | 3138.59 | 54.54 | 55.32 ‘| 101.33
58 | 3193.65 | 55.50 56.29 | 103.11
59 3248.71 | 56.45 57.26 | 104.89
60 3303.77 | 57.41 58.23 | 106.67
EK 101

French
Square
Leagues.

25=1° Eq.

58.33
61.11
63.89
66.67
69.44

72.22
75.00
77.78
80.56
83.33

86.11
88.89
91.67
94.44
97.22

100.00
102.78
105.56
108.33
py

113.89
116.67
119.44

122.22
125.00

127.78
130.56
133.33
136.11
138.89

141.67
144.44
147.22
150.00
152.78

155.56
158.33
161.11
164.89
166.67

Geograph’]
or Nautical
Sq Miles.
60=1° Eq.

336.00
352.00
368.00
384.00
400.00

416.00
432.00
448.00
464.00
480.00

496.00
512.00
528.00
544.00
560.00

576.00 |
592.00 |

608.00
624.00
640.00

656.00
672.00
688.00
704.00
720.00

736.00
752.00
768.00
784.00
800.00

816.00
832.00
848.00
864.09
880.00

896.00
912.00
928.00
944.00
960.00

English
Square
Miles.

446.47
467.73
489.00
510.26
531.52

552.78
574.04
595.30
616.56
637.82

659.08
680.34
701.60
722.86
744.12

765.38
786.65
807.91
829.17
850.43

871.69
892.95
914.21
935.47
956.73

977.99
999.25
1020.51
1041.77
1063.03

1084.29
1105.56
1126.82
1148.08
1169.34

1190.60
1211.86
1233.12
1254.38
1275.64

Russian
Square
Wersts,

1016.08

1064.47
1112.85
1161.23
1209.62

1258.00
1306.39

1354.77 |

1403.16
1451.54

1499.93
1548.31
1596.70
1645.08
1693.47

1741.85
1790.24
1838.62
1887.01
1935.39

1983.78
2032.16
2080.55
2128.93

2467.62
2516.01
2564.39
2612.78
2661.16

2709.55
2757.93
2806.32
2854.76

2903.09 |

548

GERMAN SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

pa
aecatiiee. Sq. Kilo- Austrian Prussian Ae Sainte an Nautical English
15=1°Kq.| metres. Sq. Miles. | Sq. Miles. acre eo Re ror: leat
61 3358.84 | 58.37 59.20 108.44 | 169.44 | 976.00 | 1296.90
62 3413.90 | 59.32 60.17 110.22 | 172.22 | 992.00 | 1318.16
63 3468.96 | 60.28 61.14 112,00 | 175.00 | 1008.00 | 1339.42
|| 64 3524.03 61.24 62.11 113.78 | 177.78 | 1024.00 | 1360.68
|| 65 3579.09 62.19 |* 63.08 115.56 | 180.56 | 1040.00 | 1381.94
|| 66 3634.15 | 63.15 64.05 | 117.33 | 183.33 | 1056.00 | 1403.20
| 67 3689.21 64.11 65.02 119.11 186.11 | 1072.00 | 1424.47
| 68 | 3744.98 | 65.07 | 65.99 | 120.89 | 188.89 |. 1088.00 | 1445.73
69 3799.34 | 66.02 66.96 122.67 191.67 | 1104.00 | 1466.99
eee 3854.40 | 66.98 67.93 124.44 | 194.44 | 1120.00 | 1488.25
71 3909.47 67.94 68.90 126.22 197.22 | 1136.00 | 1509.51
72 3964.53 68.89 69.87 128.00 200.00 | 1152.00 | 1530.77
73 4019.59 69.85 70.84 129.78 202.78 | 1168.00 | 1552.03
74 | 4074.66 70.81 71.81 131.56 205.56 | 1184.00 | 1573.29
75 4129.72 | 71.76 72.79 133.33 208.33 | 1200.00 | 1594.55
| 76 4184.78 72.72 73.76 135.11 211.11 | 1216.00 | 1615.81
| 77 4239.84 | 73.68 74.73 136.89 213.89 | 1232.00 | 1637.07
78 , | 4294.91 | 74.63 75.70 138.67 216.67 | 1248.00 | 1658.33
79 4349.97 75.55 76.67 140.44 | 219.44 | 1264.00 | 1679.59
80 4405.03 76.55 77.63 142.22 | 222.22 | 1280.00 | 1700.85
81 4460.10 | 77.50 78.61 144.00 225.00 | 1296.00 | 1722.11
82 4515.16 | 78.46 79.58 145.78 | 227.78 | 1312.00 | 1743.38
83 4570.22 | 79.42 80.55 147.56 | 230.56 | 1328.00 | 1764.64
84 4625.28 | 80.37 81.52 149.33 233.33 | 1344.00 | 1785.90
85 4680.35 81.33 82.49 151.11 236.11 | 1360.00 | 1807.16
86 4735.41 82.28 83.46 152.89 | 238.89 | 1376.00 | 1828.42
87 4790.47 83.25 84.43 154.67 | 241.67 | 1392.00 | 1849.68
88 4845.54 | 84.20 +| 85.40 156.44 | 244.44 | 1408.00 | 1870.94
89 4900.60 | 85.16 86.37 158.22 | 247.22 | 1424.00 | 1892.20
‘90 4955.66 86.12 87.34-| 160.00 | 250.00 | 1440.00 | 1913.46
91 5010.73 87.07 88.31 161.78 | 252.78 | 1456.00 | 1934.72
92 5065.79 88.03 89.28 163.56 255.56 | 1472.00 | 1955.98
93 5120.85 88.99 90.25 165.33 258.33 | 1488.00 | 1977.24
94 5175.91 89.94 91.22 167.11 261.11 | 1504.00 | 1998.50
95 5230.98 | 90.90 92.19 168.89 | 263.89 | 1520.00 | 2019.76
96 5286.04 | 91.86 93:17 170.67 | 266.67 | 1536.00 | 2041.03
97 5341.10 | 92.81 94.14 172.44 | 269.44 | 1552.00 | 2062.29
98 5396.17 | 93.77 95.11 174.22 | 272.22 | 1568.00 | 2083.55
99 5451.23 | 94.73 96.08 176.00 | 275.00 | 1584.00 | 2104.81
100 5506.29 | 95.68 97.05 177.78 | 277.78 | 1600.00 | 2126.07

Russian
Square
Wersts.

2951.47

2999.86
3048.24
3096.63
3145.01

3193.40
3241.78
3290.17
3338.55
3386.94

3435.32
3483.71
3532.09
3580.47
3628.86

3677.24
3725.63
3774.01
3822.40
3870.78

3919.17
3967.55
4015.94
4064.32
4112.71

4161.09
4209.48
4257.86
4306.25
4354.63

4403.02
4451.40
4499.79
4548.17
4596.56

4644.94
4693.32
4741.71
4790.09
4838.48

102

549
V. NAUTICAL SQUARE LEAGUES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

Nautical erman French |Geograph’l English Russian

G
Square | Sq. Kilo- | Austrian | Prussian | gq pijes, | Square jor Nautical) “¢.°, :
Leagues. |; metres. | Sq. Miles. | Sq. Miles. Ta, Eq. Leagues. | >q. Miles. ae eaeee
20=1° Eq. , 25=1° Eq. | 60=1° Eq. : Hf

1,000 | 30972.89) 538.2242 545.8901) 562.5000} 1562.500] 9000.000) 11959.13 27216.44 |
_ 2,000 | 61945.77,1076.448 |1091.780 |1125.000 | 3125.000}18900.00 | 23918.26) 54432.87)|
3,000 | 92918.66,1614.672 |1637.670 |1687.500 | 4687.500)27000.00 | 35877.39| 81649.31
|| 4,000 123891.5 |2152.897 |2183.561 |2250.000 | 6250.000/36000.00 | 47836.52 108865.7
5,000 |154864.4 |2691.121 |2729.451 |2812.500 | 7812.500]45000.00 | 59795.65/136082.2

6,000 |185837.3 |3229.345 |3275.341 |3375.000 | 9375.000]54000.00 | 71754.78)163298.6
7,000 |216810.2 |3767.569 |3821.231 |3937.500 |10937.50 |63000.00 | 83713.91/190515.1
8,000 |247783.1 |4305.793 |4367.121 |4500.000 |12500.00 |72000.00 | 95673.04/217731.5
9,000 |278756.0 |4844.017 4913.011 |5062.500 |14062.50 |81000.00 |107632.2 -}244947.9
10,000 |309728.9 |5382.242 /5458.901 |5625.000 |15625.00 |90000.00 |119591.3 |/272164.4

100 3097.29] 53.82 54.59 56.25 156.25 | 900.00 | 1195.91 | 2721.64
200 6194.58) 107.64 | 109.18 112.50 312.50 | 1800.00 | 2391.83 | 5443.29
300 9291.87) 161.47 | 163.77 168.75 468.75 | 2700.00 | 3587.74 | 8164.93
400 | 12389.15] 215.29 | 218.36 225.00 625.00 | 3600.00 | 4783.65 |10886.57
500 | 15486.44) 269.11 | 272.95 281.25 781.25 | 4500.00 | 5979.57 |13608.22

600 | 18583.73) 322.93 | 327.53 | 337.50 937.50 | 5400.00 | 7175.48 |16329.86
700 | 21681.02) 376.76 | 382.12 | 393.75 1093.75 | 6300.00 | 8371.39 |19051.51
800 | 24778.31) 430.58 | 436.71 | 450.00 1250.00 | 7200.00 | 9567.30 |21773.15
900 | 27875.60) 484.40 | 491.30 | 506.25 1406.25 | 8100.00 |10763.22 |24494.79
1000 | 30972.89) 538.22 | 545.89 | 562.50 | 1562.50 | 9000.00 |11959.13 |27216.44

1 30.97] 0.54 0.55 0.56 1.56 9.00 11.96 27.22
2 61.95} 1.08 1.09 1.12 3.12 18.00 23.92 54.43
3 92.92} 1.61 1.64 1.69 4.69 | - 27.00 | 35.88 81.65
4 123.89} 2.15 218 2.25 6.25 36.00 47.84 | 108.87
5 154.86} 2.69 2.73 2.81 7.81 45.00 59.80 | 136.08
. 6 185.84 3.23 3.28 3.37 9.37 54.00 7175 |’ 163:30
7 216.81| 3.77 3.82 3.94 10.94 63.00 83.71 | 190.51
8 247.78] 4.31 4.37 4.50 12.50 72.00 95.67 | .217.73
9 278.76| 4.84 4,91 5.06 14.06 81.00 | 107.63 | 244.95
10 309.73] 5.38 5.46 5.62 15.62 90.00-| 119.59 | 272.16
11 340.70/ 5.92 6.00 6.19 17.19 99.00 | 131.55 | 299.38
12 371.67|. 6.46 6.55 6.75 18.75 | 108.00 | 143.51 | 326.60
13 402.65] 7.00 nko 7.31 20.31 | 117.00 | 155.47 | 353.81
14 433.62] 7.54 7.64 7.87 21.87 | 126.00 | 167.43 | 381.03
15 464.59} 8.07 8.19 8.44 23.44 | 135.00}. 179.39 | 408.25
16 495.57| 8.61 8.73 9.00 25.00 | 144.00 | 191.35 | 435.46
DRs 526.54, 9.15 9.28 9.56 26.56 | 153.00 | 203.31 | 462.68
18 557.51| 9.69 9.83 10.12 28.12 | 162.00 | 215.26 | 499.90
19 588.48] 10.23 10.37 10.69 29.69 | 171.00 | 227.22 | 517.11 |
20 619.46} 10.76 10.92 11.25 31.25 | 180.00 | 239.18 | 544,33

A emer nme ee ae ae ee 2
E 103

550

NAUTICAL SQUARE LEAGUES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

Nautical |

Square | Sq. Kilo- | Austrian | Prussian
Leagues. | wetres. | Sq. Miles. | Sq. Miles.
20=1° Eq.

21 650.43 11.30 11.46
22 681.40 11.84 12.01
23 712.37 | 12.38 12.56
24 748.35 12.92 13.10
25 774.32 | 13.46 13.65
26 805.29 13.99 14.19
27 836.27 14.53° | 14.74
28 867.24 | 15.07 15.28
29 » 898.21 15.61 15.83

30 929.19 16.15 16.38 ©
31 960.16 16.68 .| 16.92
ABD, 991.3: \) T7222) |) 17.47
33 1022.11 17.76 18.01
34 1053.08 18.30 18.56
35 1084.05 18.84 19.11
36 1115.02 | 19.38 19.65
37 1146.00 19.91 20.20
38 1176.97 20.45 20.74
39 1207.94 | 20.99 21.29
40 1238.92 | 21.53 21.84
41 1269.89 | 22.07 |, 22.38
42 1300.86 22.61 22.98
43 1331.83 23.14 23.47
44 1362.81 23.68 24.02
45 | 1393.78 | 24.22° |) 24.67
46 1424.75 | 24.76 25.11
47 1455.73 25.30 25.66
48 1486.70 | 25.83 26.20
49 1517.67 | 26.37 26.75
50 1548.64 | 26.91 27.29
51 1579.62 | 27.45 27.84
52 1610.59 27.99 28.39 -
53 1641.56 28.53 28.93
54 1672.54 ; 29.06 29.48
55 1703.51 29.60 30.02
56 1734.48 30.14 30.57
57 1765.45 30.68 31.12
58 1896.43 | 31.21 31.66
59 1821.40 | 31.76 32.21
60 1858.37 32.29 32.75

E

German
Sq. Miles.
15=1° Eq.

11.81
12.37
12.94
13.50
14.06

14.62
15.19
15.75
16.31
16.87

17.44
18.00
18.56
19.12
19.69

20.25
20.81
21.37
21.94
22.50

23.06
23.62
24.19
24.75
25.31

25.87
26.44
27.00
27.56
28.12

28.69
29.25
29.81
30.37
30.94

31.50
32.06
32.62
33.19
33.75

French |Geograph’l

Square

Leagues,

32.81
34.37
35.94
37.50
39.06

40.62
42.19
43.75
45.31
46.87

48.44
50.00
51.56
53.12
54.69

56.25

57.81
59.37

~ 60.94

62.50

64.06
65.62
67.19
68.75
70.31

71.87
73.44
75.00
76.56
78.12

79.69
81.25

25=1° Eq.

82.81.

84.37
85.94

87.50
89.06
90.62
92.19
93.75

or Nautical
Sq. Miles.
60=1° Eq.

189.00
198.00
207.00
216.00
225.00

234.00
243.00
252.00
261.00
270.00

279.00
288.00
297.00
306.00
315.00

324.00
330.00
342.00
351.00
360.00

369.00
378.00
387.00
396.00
405.00

414.00
423.00
432.00
441.00
450.00

459.00

468.00

477.06)
486.00)
495.00)

504.00
513.00
522.00
531.00
540.00

English
Square
Miles.

251.14
263.10
275.06
287.02
298.98

310.94
322.90
334.86
346.81
358.77

370.73
382.69
394.65
406.61
418.57

430.53
442.49
454.45
466.41

478.37

490.32
502.28
514.24
526.20
538.16

550.12
562.08
574.04
586.00
597.96

609.92
621.87
633.83
645.79
657.75

669.71
681.67
693.63
705.59

717.55

Russian
Square
Wersts.

571.55
598.76,
625.98
653.19
680.41

707.63
734.84
762.06
789.28
816.49

843.71
870.93
898.14
925.36
952.58

979.79
1007.01
1034.22
1061.44
1088.66

1115.87
1143.09
1170.31
1197.52
1224.74

1251.96

1279.17

1306.39
1333.61
1360.82

1388.04
1415.26
1442.47
1469.69
1496.90

1524.12
1551.34
1578.55

1605.77

1632.99

104

551

NAUTICAL SQUARE LEAGUES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES,

Nautical
Square
Leagues.

20=1° Eq.

61
62
63
64
65

66
67
68
69
70

ae
72
73
74
75

76
un
78
79
80

81
82
83
84
85

86
87
88
89
90

91
92
93
94
95

96
97
98
99
100

Sq. Kilo-
metres.

1889.35

1920.32
1951.29
1982.26
2013.24

2044.21
2075.18

| 2106.16

2137.13
2168.10

2199.08
2230.05
2261.02
2291.99
2322.97

2353.94
2384.91
2415.89
2446.86
2477.83

2508.81
2539.78
2570.75
2601.72
2632.70

2663.67
2694.64
2725.62
2756.59
2787.56

2818.53
2849.51
2880.48
2911.45
2942.42

2973.40
3004.37
3035.34
3066.32
3097.29

Austrian
Sq. Miles.

32.83
33.37
33.91
34.45
34.98

39.52
36.06
36.60
37.14
37.68

38.21
38.75
39.29
39.83
40.37

40.91
41.44
41.98

* 42.52

43.06

43.60
44.13
44.67
45.21
45.75

46.29
46.83
47.36
47.90
48.44

48.98
49.52
50.05
50.59
51.13

51.67
52.21
52.75
53.28
53.82

Prussian
Sq. Miles.

33.30
33.85
34.39
34.94
35.48

36.03

36.57

37.12
37.67
38.21

38.76
39.30
39.85
40.40
40.94

41.49
42.03
42.58
43.13
43.67

44,22
44.76
45.31
45.85
46.40

46.95
47.49
48.04
48.58
49.13

49.68
50.22
50.77
51.31
51.86

52.41
52.95
53.50
54.04
54.59

German
Sq. Miles.
15=1° Eq.

34.31
34.87
35.44
36.00
36.56

37.12
37.69
38.25
38.81
39.37

39.94
40.50
41.06
41.62
42.19

42.75
43.31
43.87
44.44
45.00

45.56
46.12
46.69
47.25
47.81

48.37
48.94
49.50
50.06
50.62

51.19
51.75
52.31
52.87
53.44

54.00
54.56
55.12
55.69
56.25

105

French
Square
Leagues.

25=1° Eq.

95.31
96.87
98.44
100.00
101.56

103.12
104.69
106.25
107.81
109.37

110.94
112.50
114.06
115.62
117.19

118.75
120.31
121.87
123.44
125.00

126.56
128.12
129.69
131.25
132.81

134.37
135.94
137.50
139.06
140.62

142.19
143.75
145.31
146.87
148.44

150.00
151.56
153.12
154.69
156.25

Geograph’l
or Nautical
Sq. Miles.
60=1° Eq.

549.00
558.00
567.00
576.00
585.00

594.00
603.00
612.00
621.00
630.00

639.00
648.00
657.00
666.00
675.00

684.00
693.00
702.00
711.00
720.00

729.00
738.00
747.00
756.00
765.00

774.00
783.00
792.00
801.00
810.00

819.00
828.00
837.00
846.00
855.00

864.00
873.00
882.00
891.00
900.00

English
Square
Miles.

729.51
741.47
753.43
765.38
777.34

789.30
801.26
813.22
825.18
857.14

849.10
861.06
873.02
884.98
896.93

908.89
920.85
932.81
944.77
956.73

968.09
980.65
992.61
1004.57
1016.53

1028.49
1040.44
1052.40
1064.36
1076.32

1088.28
1100.24
1112.20
1124.16
1136.12

1148.08
1160.04
1171.99
1183.95
1195.91

Russian ||

Square
Wersts.

Wet
1660.20

1687.42

1714.64 ||

1741.85
1769.07

1796.29
1823.50
1850.72
1877.93
1905.15

1932.37
1959.58
1986.80
2014.02
2041.23

2068.45
2095.67
2122.88

2150.10

2177.32 |

bo

2231.75
2258.97
2286.18
2313.40

2340.61
2367.83
2395.05
2422.26
2449.48

2476.70
2503.91
2531.13
2558.35
2585.56

2612.78
2640.00
2667.21
2694.43
2721.64

204.53 —

—_

552

VI. FRENCH SQUARE LEAGUES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES

French
square. Sq. Kilo- | Austrian Prussian
Leagues. | metres. | Sq. Miles.) Sq. Miles.
25=1° Eq.
1,000 | 19822.63) 344.463) 349.370
|} 2,000 | 39645.27} 688.927) 698.739
‘| 3.000 | 59467.90| 1033.390| 1048.109
|| 4,000 | 79290.54) 1377.853| 1397.479
|| 5,000 | 99113.17| 1722.317| 1746.848
6,000 |118935.8 | 2066.781) 2096.218
7,000 |138758.4 | 2411.244} 2445.588
8,000 |158581.1 | 2755.708| 2794.957
9,000 |178403.7 | 3100.171| 3144.327
10,000 |198226.3 | 3444.635) 34.93697
100 1982.26) 34.45 34.94
200 3964.53] 68.89 69.87
300 5946.79| 103.34 | 104.81
400 7929.05} 137.79 | 139.75
|| 500 | 9911.32} 172.23] 174.68
600 | 11893.58] 206.68 | 209.62
| 700 | 13875.84| 241.12. 244.56.
| 800 | 1£858.11] 275.57 | 279.50
|| 900 -; 17840.37} 310.02 | 314.43
|| 1000 | 19822.63} 344.46 | 349.37
a 19.82 0.34 | - 0.35
2 39.65 0.69 0.70
3 59.47 1.03 1.05
4 79.29 1.38 1.40
5 99.11 172 1.75
6 118.94|° 2.07 2.10
a 138.76 2.41 2.45
8 158.58 2.76 2.79
9 178.40 3.10 3.14
10 198.23 3.44 3.49
11 218.05 3.79 3.84
Hey ato: 237.87 4.13 4.19
13 257.69 4.48 4.54
14 277.52 4.82 ° 4,89
15 297.34 5.17 5.24
16 317.16 5.51 5.59
Ne ale 336.98 5.86 5.94
ll eas 356.81 6.20 6.29
19 376.63 6.54 6.64
20 396.45 6.89 6.99

German

Sq. Miles.
15=1° Eq.

360.000
720.000
1080.000
1440.000
1800,000

2160.000
2520.000
2880.000
3240,000
3600.000

36.00
72.00
108.00
144.00
180.00

216.00
252.00
288.00
324.00

360.00

0.36
0.72
1.08
1.44
1.80

2.16
2.52
2.88
3.24
3.60

3.96
4.32
4.68
5.04
5.40

5.76
6.12
6.48
6.84
7.20

106

Nautical
Square
Leagues.

20=1° Kq.

640.000
1280.000
1920.000
2560.000
3200.000

3840.000

4.480.000.

5120.000
5760.000

6400.000

64.00
128.00
192.00
256.00
320.00

384.00
448.00
512.00
576.00
640.00

0.64
1.28
1.92
2.56
3.20

3.84
4.48
5.12
5.76
6.40

7.04
7.68
8.32
8.96
9.60

10.24
10.88
11.52
12.16
12.80

Geograph’ |
or Nautical
Sq. Miles.
60=1° Kq

5760.00
11520.00
17280.00
23040.00
28800.00

34560.00
40320.00
46080.00 .
51840.00

57600.00

576.00
1152.00
1728.00
2304.00
2880.00

3456.00
4032.00
4608.00
5184.00
5760.00

5.76
11.52
17.28
23.04
28.80

34.56
40.32
46.08
51.84
57.60

63.36 |

69.12
74.88
80.64
86.40

92.16
97.92
103.68
109.44
115.20

English
Square
Miles.

7653.844

15307.69

|22961.53
(30615.37

38269.22

45923.06
53576.90
61230.75
68884.59
76538.43

765.38
1530.77
2296.15
3061.54
3826.92

4592.31
5357.69
6123.08
6888.46
7653.84

7.65
15.31
22.96
30.62
38.27

45.92
53.58 .
61.23
68.88
76.54

84.19
91.85
99.50
107.15
114.81

122.46
130.12
137.77
145.42

153.08

Russian
Square
Wersts,

17418.52)|

34837.05
52255.57
69674.09
87092.61

104511.1
121929.7
139348.2
156766.7
174185.2

1741.85
3483.71
5225.56
6967.41
8709.26

10451.11
12192.97
13934.82
15676.67

17418.52

17.42
34.84
52.26
69.67
87.09

104.51
121.93
139.35
156.77
174.18

191.60
209.02

226.44
243.86
261.28

278.70
296.11
343503
330.95
348.37

|

553
FRENCH SQUARE LEAGUES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

a

Seats Sq. Kilo- Austrian Prussian oer ae ee or Naneicll es eee
| . metres, | Sq. Miles. | Sq. Miles. | 750 £q. Bene, SR noEe: Miles. Warne:
21 416.28 7.23 7.34 7.56 13.44 120.96 160.73 365.79
22 436.10 7.58 7.69 7.92 14.08 126.72 168.38 | 383.21
23 455.92 7.92 8.04 8.28 14.72 132.48 176.04 | 400.63
24 475.74 8.27 8.38 8.64 15.36 138 24 | 183.69 | 418.04
25 495.57 8.61 8.73 9.00 16.00 144.00 191.35 | 435.46
26 515.39 8.96 9.08 0.36 16.64 149.76 199.00 | 452.88
27 535.21 9.30 9.43 9.72 17.28 155.52 206.65 470.30
28 555.03 9.65 9.78 10.08 17.92 161.28 | 214.31 | 487.72
29 574.86 9:99 10.13 10.44 18.56 167.04 | 221.96 505.14
30 594.68 10.33 10.48 10.80 19.20 172.80 229.62 522.56
31 614.50 | 10.68 10.83 11.16 19.84 178.56 | 237.27 | 539.97
32 634.32 11.02 1W1.18:") 14.52 20.48 184.32 | 244.92 | 557.39

33 654.15 11.37 11.53 11.88 21.12 190.08 | 252.58 | 574.81
34 Cros) wale 11.88 12.24 21.76 195.84 | 260.23 | 592.23

35 693.79 | 12.06 12.23 12.60 22.40 201.60 | 267.88 | 609.65 ||
36 713.61 | 12.40 12.58 12.96 23.04 207.36 | 275.54 | 627.07
37 733.44 | 12.75 12.93 13.32 23.68 213.12 | 283.19 644.49
38 753.26 | 13.09 13.28 |° 13.68 24,32 218.88 | 290.85 661.90
39 773.08 | 13.43 13.63 14.04 24.96 224.64 | 298.50.| 679.32

40 792.91 13.78 - 13.97 14.40 25.60 230.40 | 306.15 696.74

41 812.73 | 14.12 14.32 14.76 26.24 236.16 | 313.81 714.16
42 832.55 14.47 14.67 4 15.12 26.88 241.92 | 321.46 | 731.58
43 852.37 14.81 15.02 15.48 27.52 247.68 329.12 | 749.00
44 872.20 | 15.16 15.37 15.84 28.16 253.44 | 336.77 766.41
45 892.02 | 15.50 15.72 16.20° 28.80 259.20 | 344.42 | 783.83
46 901.84 | 15.85 16.07 16.56 29.44 264.96 | 352.08 |- 801.25

AT 951.66 16.19 16.42 16.92 30.08 270.72 | 359.73 818.67
48 951.49 16.53 16.77 17.28 30.72 276.48 | 367.38 | 836.09
49. 97ie31 | “16:88 17.12 17.64 31.36 282.24 | 375.04 | 853.51
50 SOAS] | W722, 17.47 18.00 32.00 288.00 | 382.69 870.93

51 1010.95 17.57 17.82 18.36 32.64 293.76 | 390.35 888.34
52 1030.78 17.91 18.17 18.72 33.28 299.52 | 398.00 | 905.76
1050.60 18.26 18.52 19.08 33.92 305.28 | 405.65 923.18
54 1070.42 18.60 18.87 19.44 34.56 311.04 | 413.31 940.60
55 1090.24 | 18.95 19.22 19.80 35.20 316.80 | 420.96 958.02

56 1110.07 19.29 19.56 20.16 35.84 322.56 | 428.62 | 975.44
57 1129.89 19.63 19.91 20.52 |. 36.48 328.32 | 436.27 992.86
58 1149.71 19.98 20.26 20.88 37.12 334.08 | 443.92 | 1010.27
59 1169.54 |, 20.32 20.61 21.24 37.76 339.84 | 451.58 | 1027.69
60 1189.36 | 20.67 20.96 21.60 38.40 345.60 | 459.23 |

E 107

554

FRENCH SQUARE LEAGUES a O DIFFERENT GEOGRAPHICAL SQUARE MEASURES,

French
Square
Leagues.

25==1° Eq.

61
62
63
64
65

66
67
68
69
70

71
72
73
74
75

76
77
78
79
80

91
92
93
94
95

96
97
98
99
100

Sq. Kilo-
metres,

1209.18
1229.00
1248.83
1268.65
1288.47

1308.29
1328.12
1347.94
1367.76
1387.58

1407.41
1427.23
1447.05
1466.87
1486.70

1506.52
1526.34
1546.17
1565.99
1585.81

1605.63
1625.46
1645.28
1665.16
1684.92

1704.75
1724.57
1744.39
1764.21

1784.04

1803.86
1823.68
1843.51
1863.33
1883.15

1902.97
1922.80
1942.62
1962.44
1982.26

Austrian
Sq. Miles.

21.01
21.36
21.70
22.05
22.39

22.73
23.08
23.42
23.00
24.11

24.46
24.80
25.15
25.49
25.83

26.18
26.52
26.87
27.21
27.56

27.90
28.25
28.59
28.93
29.28

29.62
29.97
30.31
30.66
31.00

31.35
31.69
32.04
32.38
32.72

33.07
33.41
33.76
34.10
34.45

[

{

Prussian
Sq. Miles.

21.31
21.66
22.01
22.36
22.71

23.06
23.41
23.76
24.11
24.46

24.81
25.15
25.50
25.85
26.20

26.55
26.90
27.25
27.60
27.95

28.30
28.65
29.00
29.35
29.70

30.05
30.40
30.74
31.09
31.44

31.79
32.14
32.49 .
32.84
33.19

33.54
33.89
34.24
34,59
34.94

German
Sq. Miles.
15=1° Eq.

21.96
22.32
22.68
23.04
23.40

23.76
24.12
24.48
24.84
25.20

25.56
25.92
26.28
26.64
27.00

27.36
27.72
28.08
28.44
28.80

29.16
29.52
29.88
30.24
30.60

30.96
31.32
31.68
32.04
32.40

32.76
33.12
33.48
33.84
34.20

34.56
34.92
35.28
35.64
36.00

|
Nautical |Geograph’l

: 2 English Russian
Tdaetees | aa Malcesine On eonea
20=1° Eq. | 60-=1° Eq, Miles. Wersts.

39.04 351.36 466.88 | 1062.53

39.68 357.12 | 474.54 | 1079.95

40.32 362.88 482.19 | 1097.37

40.96 368.64,| 489.85 | 1114.79

41.60 |. 374.40 | 497.50 | 1132.20

42.24 380.16 505.15 | 1149.62

42.88 385.92 512.81 | 1167.04

43.52 391.68 520.46 | 1184.46

44.16 397.44 528.12 | 1201.88

44.80 403.20 535.77 | 1219.30

45.44 408.96 543.42 | 1236.72

46.08 414.72 501.08 ) 1254.13

46.72 420.48 558.73 | 1271.55

47.36 426.24 | 566.38 | 1288.97

48.00 | 432.00 574.04 | 1306.39

48.64 437.76 581.69 | 1323.81

49.28 443.52 589.35 | 1341.23
_ 49.92 449.28 597.00 | 1358.64

50.56 445.04 604.65 | 1376.06

51.20 460.80 612.31 | 1393.48

51.84 466.56 619.96 | 1410.90

52.48 472.32 627.62 | 1428.32

53.12 478.08 635.27 | 1445.74

53.76 483.84 642.92 | 1463.16

54.40 489.60 650.58 | 1480.57

55.04 495.36 658.23 | 1497.99

55.78 501.12 665.88 | 1515.41

56.32 506.88 673.54 | 1532.83

56.96 512.64 681.19 | 1550.25

57.60 518.40 688.85 | 1567.67

58.24 524.16 696.50 | 1585.09

58.88 529.92 704.15 | 1602.50

59.52 535.68 W11581 | 1619.92

60.16 541.44 719.46 | 1637.34

60.80 547.20 727.12 | 1654.76

61.44 552.96 734.77 | 1672.18

62.08 558.72 742.42 | 1689.60

62.72 564.48 750.08 | 1707.02

63.36 570.24 757.73 | 1724.43

64.00 576.00

108

765.38

1741.85

550

#II. GEOGRAPHICAL OR NAUTICAL SQUARE MILES INTO DIFFERENT GEOGRAPHICAL
SQUARE MEASURES.

Geograph.
| or Naut. | Sq. Kilo- | Austrian
Sq. Miles.| metres. | Sq. Miles.
60=1° Eq.
1,000 | 3441.43 | 59.80268
2,000 | 6882.86 |119.6054
8,000 |10324.30 |179.4081
4,000 |13765.73 |239.2107
5,000 |17207.16 (299.0134
6,000 |20648.59 (358.8161
7,000 |24090.02 |418.6188
8,000 |27531.45 |478.4215
9,000 |30972.89 538.2242
10,000 |34414.32 598.0268
100 344.14 | 5.98
200 688.29 | 11.96
300 | 1032.43 | 17.94
400 | 1376.57 | 23.92
500 1720.72 | 29.90
600 | 2064.86 | 35.88
700 | 2409.00 | 41.86
800 | 2753.15 | 47.84
900 | 3097.29 | 53.82
1000 | 3441.43 | 59.80
1 3.44 | 0.06
2 6.88 | 0.12
3 10.32 | 0.18
4 13.77 | 0.24
5 17.21 0.30
6 20.65 0.36
i 24.09 0.42
8 27.53 | 0.48
9 30.97 0.54
10 34.41 0.60
11 37.86 | 0.66
12 41.30 | 0.72
13 44.74 | 0.78 |
14 48.18 0.84
15 51.62 | 0.90
16 55.06 0.96
alt 58.50 | 1.02
18 61.95 1.08
19 65.39 1.14
20 68.83 | 1.20

60.65446

|242.6178

Prussian
Sq. Miles.

121.3089
181.9634

303.2723

363.9268
424.5812
485.2357
545.8901
606.5446

6.07
12.13
18.20
24.26
30.33

36.39
42.46
48.52
54.59
60.65

0.06
0.12
0.18
0.24
0.30

0.36
0.42
0.49
0.55
0.61

0.67
0.73
0.79
0.85
0.91

0.97
1.03
1.09
1.15
1.21

German
Sq. Miles.
15=1° Eq.

62.5000
125.000
187.500
250.000
312.500

375.000
437.500
500.000
562.500
625.000

6.25
12.50
18.75
25.00
31.25

37.50
43.75
50.00
56.25
62.50

0.06
0.12
0.19
0.25
0.31

0.37
0.44
0.50
0.56
0.62

,
0.69

0.75
0.81
0.87
0.94

1.00
1.06
1.12
1.19
1.25

Nautical
Square .
Leagues.

20=1° Eq.

111.1111
222.2222
333.3303
444.4444
955.5556

666.6667

777.7778

888.8889
1000.000
SACL

11.11
22.22
33.33
44.44
55.56

66.67
77.78
88.89
100.00
111.11

0.11
0.22
0.33
0.44
0.56

0.67
0.78
0.89
1.00
iar

1.22
1.33
1.44
1.56
1.67

1.78
1.89
2.00
2.11
2.22

French
Square
Leagues.

25=1° Eq.

173.6111
347.2222
520.8333
694.4444
868.0556

1041.667
|1215.278
1388.889
1562.500
1736.111

17.36
34.72
52.08
69.44
86.81

104.17
121.53
138.89
156.25
173.61

0.17
0.35
0.52
0.69
0.87

1.04
1.22
1.39
1.56
1.74

Teo
2.08
2.26
2.43
2.60

2.78
2.95
3.12
3.30
3.47

English
Square
Miles,

1328.792

2657.585
3986.377
5315.169
6643.964

7972. 754

9301.546
10630.34
11959.13
13287.92

132.88
265.76
398.64
531.52
664.40

797.28
930.15
1063.03
1195.91
1328.79

1.33
2.66
ego
5.32
6.64

7.97
9.30
10.63
11.96
13.29

14.62
15.95
17.27
18.60
19.93

21.26
22.59
23.92
25.25
26.58

Russian
Square
Wersts.

3024.049

6048.098

9072.147
12096.20
15120.25

18144.29
21168.34
24192.39
27216.44
30240.49

302.40
604.81
907.21
1209.62
1512.02

1814.43
2116.83
2419.24
2721.64
3024.05

3.02
6.05
9.07
12.10
15.12

18.14
21.17
24.19
27.22
30.24 }

33.26
36.29
39.31
42.34
45.36

48.38
51.41
54.43
57.46
60.48

109

556

GEOGRAPHICAL OR NAUTICAL SQUARE MILES INTO DIFFERENT GEOGRAPHICAL
SQUARE MEASURES.

Geograph. Bs ? : German Nautical French English
or Naut. Sq. Kilo- Austrian Prussian Sq. Miles. Square Square Square
Sq. Miles.| metres. Sq. Miles. | Sq. Miles. | j,j0 Eq. Leagues. Leagues. Miles.
60 =1° Eq. : 20=1° Eq. | 25=1° Eq.

21 72.27 1.26 1.27 1.31 2.33 3.65 27.90
22 Oe: 1.32 15338 Se 2.44 3.82 29.23
23 AILS 1.38 1.40 1.44 2.56 3.09 30.56
24 82.59 1.44 1.46 1.50 2.67 4.17 SLO,
25 86.04 1:50 a 52 1.56 2.78 4,34 33.22
26 89.48 1.55 1.58 1.62 2.89 4.51 34.55
27 92.92 1.61 1.64 1.69 3.00 4.69 35.88
28 96.36 1.67 1.70 1.75 3.11 4.86 37.21
29 99.80 Lid 1.76 1.81 3.22 5.03 38.53
30 103.24 “S79 1.82 1.87 3.33 5.21 39.86
31 106.68 1.85 1.88 1.94 3.44 5.38 41.19
32 110.13 LOL 1.94 2.00 3.56 5.56 ‘42.52
33 MASI 1.97 2.00 2.06 3.67 5.72 43.85
34 117.01 2.03 2.06 2.12 3.78 5.90 45.18
35 120.45 2.09 2.12 2.19 3.89 6.08 46.51
36 123.89 2.15 2.18 2.25 4.00 6.25 47.84
37 127.33 2.21 2.24 2.31 4.11 6.42 49.17
38 130.77 2.27 2.30 2.37 4.22 6.60 50.49
39 134.22 Zoo 2.37 2.44 4.33 6.77 51.82
40 137.66 2.39 2.43 2.50 444 6.94 53.15
41 141.10 2.45 2.49 "2.56 4.56 7.12 54.48
42 144.54 2.51 2.55 2.62 4.67 7.29 55.81
43 147.98 2.57 2.61 2.69 4.78 7.47 57.14
44 151.42 2.63 2.67 2.75 4.89 7.64 58.47
45 154.86 2.69 2.73 2.81 5.00 7.81 59.80
46 158.31 2.75 2.79 2.87 5.11 7.99 61.12
47 161.75 2.81 2.85 2.94 5.22 8.16 | 62.45
48 165.19 | 2.87 2.91 3.00 5.33 8.33 | 63.78
49 168.63 2.93 ‘2.97 3.06 5.44 8.51 65.11
50 172.07 2.99 3.03 3.12 5.56 8.68 66.44
51 175.51 | 3.05 3.09 3.19 5.67 S85 |) Neti
52 178.96 Sold DLO 3.25 5.78 9.03 69.10
5S 182.40 317 3.21 3.31 5.89 9.20 70.43
54 185.84 3.23 3.28 3.37 6.00 9.37 Leto
55 189.28 3.29 3.34 3.44 6.11 9EDD 73.08
56 192.72 3.30 3.40 3.50 6.22 9.72 74.41
57 196.16 3.41 3.46 3.56 6.33 9.90 75.74
58 199.60 3.47 3.52 3.62 6.44 10.07 77.07
59 203.04 B00 3.58 3.69 6.56 10.24 78.40
60 206.49 3.59 3.64 3.15 6.67 10.42 79.73

Russian
Square
Wersts.

63.51
66.53
69.55
72.58
75.60

78.63
81.65
84.67
87.70
90.72

93.75
96.77
99.79
102.82
105.84

108.87
111.89
114.91
117.94
120.96

123.99
127.01
130 03
133.06
136.08

139.11
142.13
145.15
148.18
151.20

154.23
157.25
160.27
163.30
166.32

169.35
172.37
175.39
178.42
181.44

110

557

GEOGRAPHICAL OR NAUTICAL SQUARE MILES INTO DIFFERENT GEOGRAPHICAL
SQUARE MEASURES.

Geograph.
or Naut.
Sq. Miles.
60=1° Eq.

81
82
83
84
85

96
97
98
99
100

Sq. Kilo-
metres.

Austrian

Prussian

Sq

German
- Miles.

Sq. Miles. | Sq. Miles.) 1510 Raq.

4.84
4.90
4.96
5.02
5.08

5.14
5.20
5.26
5.32
5.38

5.44
5.50
5.56
5.62
5.68

5.74
5.80
5.86
5.92
5.98

4.00
4.06
4.12
4.19
4.25

4.31
4.37
4.43
4.49
4.55

4.61
4.67
4.73
4.79
4.85

4.91
4.97
5.03
5.09
5.16

5.22
5.28
5.34
5.40
5.46

5.52
5.58
5.64
5.70
5.76

5.82
5.88
5.94
6.00
6.07

5.37

5.50
5.56
5.62

5.69
5.75
5.81
5.87
5.94

6.00
6.06
6.12
6.19
6.25

Ill

Nautical
Square
Leagues.

20=1° Eq.

6.78
6.89
7.00
fie et!
7.22

7.33
7.44
7.56°
7.67
7.78

7.89
8.00
8.11
8.22
8.33

- 8.44
8.56
8.67
8.78
8.89

9.00
eel
9.22
9.33
9.44

9.56
9.67
9.78
9.89

10.00

10.11
10.22
10.33
10.44
10.56

10.67
10.78
10.89
11.00
seesTet

French
Square
Leagues.

OME Oe

10.59
10.76
10.94
tah:
11.28

11.46
11.63
11.81
11.98
12.15

12.33
12.50
12.67
12.85
13.07

13.19
13.37
13.54
13.72
13.89

14.06
14.24
14.41
14.58
14.76

14.93
15.10
15.28
15.45
15.62

15.80
15.97
16.15
16.32
16.49

16.67
16.84
17.01
17.19
17.36

English
Square
Miles.

81.06
82.39
83.71
85.04
86.37

87.70
89.03
90.36
91.69
93.02

94.34
95.67
97.00
98.33
99.66

100.99
102.32

_ 103.65

104.97
106.30

107.63
108.96
110.29
111.62
112.95

114.28
115.60
116.93
118.26
119-59

120.92

122.2

ae

123.58
124.91

126.24

pi

1

jr

Ww b bo

ae
a

bo Cc or
©

bo

a

131.55
132.88

Russian

Square

Wersts.
e

184.47
187.49
190.52
193.54
196.56

199.59
202.61
205.64
208.66
211.68

214.71
217.73
220.76
223.78
226.80

229.83
232.85
235.88
238.90
241.92

244.95
247.97
251.00
254.02
257.04

260.07
263.09
266.12
269.14
272.16

275.19
278.21
281.24
284.26
287.28

290.31
293.33
296.36
299.38
302.40

VIII. ENGLISH SQUARE MILES INTO DI

558

FFERENT GEOGRAPHICAL SQUARE MEASDRES,

|| English
Square
Miles.

1,000
2,000
3,000
4,000
5,000

6,000
7,000
8,000
9,000
10,000

100
200
300
400
500

600
700
800
900
1000

ao. OO DS

oon oO

11
12
13
14
15

16
17
18
19
20

ee

Sq. Kilo-
metres.

2589.894

5179.789

7769.683
10359.58
12949.47

15539.37
18129.26
20719.16
23309.05
25898.94

258.99
517.98
776.97
1035.96
1294.95

1555.39
1812.93
2071.92
2330.91+
2589.89

2.59
5.18
Mone
10.36
12.95

15.54
18.13
20.72
23.31
25.90

28.49
31.08
33.67
36.26
38.85

41.44
44.03
46.62
49.21
51.80

Austrian
Sq. Miles.

135.0159
180.0117
225.0265

270.0318
315.0470
360.0423
405.0476
450.0529

4.50
9.00
13.50
18.00
22.50

27.00
31.50
36.00
40.50
45.01

0.05
0.09
0.14
0.18
0.23

0.27
0.32
0.36
0.41
0.45

0.50
0.54
0.59
0.63
0.68

0.72
0.77
0.81
0.86
0.90

Prussian
Sq. Miles.

45.00529) 45.64631
90.01058| 91.29261

136.9389
182.5852
228.2315

273.8778
319.5241
365.1704
410.8168
456.4631

4.56
9.13
13.69
18.26
22.82

27.39
31.95
36.52
41.08
45.65

0.05
0.09
0.14
0.18
0.23

0.27
0.32
0.37
0.41
0.46

0.50
0.55
0.59
0.64
0.68

0.73
0.78
9.82
0.87
0.91

German
Sq. Miles.
15=1° Eq.

47.03519

94.07038
141.1056
188.1408
235.1760

282.2112
329.2463
376.2815
423.3167
470.3519

4.70 .

9.41
14.11
18.81
23.52

28.22
32.92
37.63
42.33
47.04

0.05
0.09
0.14
0.19
0.24

0.28
0.33
0.38
0.43
0.47

0.52
0.56
0.61
0.66
0.71

0.75
0.80
0.85
0.89
0.94

Nautical French |Geograph’!
Square Square jor Nautical
Leagues. | Leagues. | Sq. Miles.
20=1° Eq. | 25=1° Eq. | 60=1° Eq.
83.61812) 130.6534) 752.5631
167.2362 | 261.3068)1505.126
250.8544 |. 391.9602|/2257.689
334.4725 | 522.6136/3010.252
418.0906 | 653.2671|3762.815
501.7087 | 783.9205|4515.379
585.3268 | 914.5739|/5267.942
668.9450 |1045.227 |6020.505
752.5631 |1175.881 |6773.068
836.1812 |1306.534 |7525.631
8.36 13.07 75.26
16.72 26.13 L501
25.09 39.20 225.77
33.45 52.26 301.03
41.81 65.33 376.28
50.17 78.39 451.54
58.53 91.46 5ZGe00"
66.89 104.52 602.05
75.26 117.59 677.31
83.62 130.65 752.56
0.08 0.13 0.75
0.17 0.26 1.51
0.25 0.39 2.26
0.33 0.52 3.01
0.42 0.65 SHAG
0.50 0.78 4.52
0.59 0.91 5.27
0.67 1.05 6.02
0.75 1.18 6.77
0.84 Lol 7.53
0.92 1.44 8.28
1.00 SS le 9.03
1.09 1.70 9.78
ole 1.83 10.54
1.25 1.96 29
1.34 2.09 12.04
1.42 2.22 12.79
5 Deon 13.55
1559 2.48 14.30
1.67 2.61 15.05

ne eee

112

Russian
Square
Wersts.

2275.788
4551.575
6827.363
9103.151
11378.94

13654.73
15930.51
18206.30
20482.09
22757.88

227.58
455.16
682.74
910.32
1137.89

1365.47
1593.05
1820.63
2048.21
2275.79

2.28
4.55
6.83
9.10)
11.38

13.65
15.93
18.20
20.48
22.76

25.03
27.31
29.59
31.86
34.14

36.41
38.69
40.96
43.23
45.52

559
ENGLISH SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

English Gernian Nautical French |Geograph’l

=F z ‘ Russian

Bune "et ciea, | Ga, mileal| qs mies: | Seer ese. poten, Sa ales Square
21 54.39 0.95 0.96 0.99 1.76 2.74 15.80 |- 47.79
22 56.98 0.99 1.00 1.03 1.84 2.87 16.56 50.07
23 Ovo 1.04 1.05 1.08 1.92 3.01 , 17.31 52.34
24 62.16 1.08 1.10 1.43 2.01 3.14 18.06 54.62
25 64.75 1.13 1.14 1.18 2.09 3.27 18.81 56.89
26 67.34 eZ i '9 1.22 2.17 3.40 19.57 59.17
27 69.93 1.22 1.23 1.27 2.26 3.00 20.32 61.45
28 72.52 1.26 1.28 1.32 2.34 3.66 21.07 63.72
29 doetll ol 1.32 1.36 2.42 Selo 21.82 66.00
30 77.70 1.35 137 ‘1.41 2.51 3.92 22.58 68.27
31 80.29 1.40 - 1.42 1.46 2.59 4.05 23.33 70.55
32 82.88 1.44 1.46 Dil 2.68 4.18 24.08 72.83
33 85.47 1.49 oo! MOD 2.76 4.31 24.83 75.10
34 88.06 1.53 we5D 1.60 2.84 4.44 25259 77.38
35 90.65 1.58 |) 1.60 1.65 2.93 4.57 26.34 79.65
36 93.24 1.62 1.64 1.69 3.01 4.70 27.09 81.93
37 95.83 1.67 1.69 1.74 3.09 4.83 27.84 84,20
38 _ 98.42 eral Uy 1.78 3.18 4.96 28.60 86.48
39 101.01 1.76 1.78 1.83 3.26 5.00 29.35 88.76
40 103.60 1.80 1.83 1.88 3.34 5.23 30.10 91.03
41 106.19 1.85, 1.87 POS: 3.43 5.36 30.86 93.31
42 108.78 1.89 1.92 1.98 3.51 5.49 31.61 95.58
43 TES 7 1.94 1.96 2.02 3.60 5.62 32.36 97.86
44 113.96 1.98 2.01 2.07 3.68 5275 33.11 100.13
45 116.55 2.03 2.05 2.12 3.76 5.88 33.87 102.41
46 119.14 2.07 2.10 2.16 3.85 6.01 34.62 104.69
47 121.73 2.12 2.15 2.21 3.93 6.14 35.07 106.96
48 124.31 2.16 2.19 2.26 4.01 6.27 36.12 109.24
49 126.90 2.21 2.24 2.30 4.10 6.40 36.88 sb
50 129.49 2.25 2.28 2.35 4.18 6.53 37.63 113.79
51 132.08 2.30 2.33 2.40 4.26 6.66 38.38 116.07
52 134.67 2.34 2.37 2.45 4.34 6.79 oils 118.34
53 137.26° 2.39 2.42 2.49 4.43 6.92 39.89 120.62
54 139.85 2.43 2.46 2.54 4.52 7.06 40.64 122.89
55 142.44 2.48 2.51 2.59 4.60 7.19 41.39 125.17
56 145.03 2:52 i) 92:56 2.63 4.68 7.32 42.14 127.44
57 147.62 2.57 2.60 2.68 4.77 7.45 42.90 129.72
58 150.21 2.61 2.65 2.73 ‘4,85 7.58 43.65 132.00
59 152.80 2.66 2.69 2.78 4.93 ee (all 44.40 134.27
60 155.39 2.70 2.74 2.82 5.02 7.84 45.15 136.55

E 113

560

ENGLISH SQUARE MILES INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

61
62
63

65

66
67
68
69
70

71
72
73
74
75

Weal
iWseva dee
78
79
80

81
82
83
84
85

86
87
88
89
90

91
92
93
94
95

96
| il
| 98

99
100

English
Square
Miles.

64

Sq. Kilo-
metres.

157.98
160.57
163.16
165.75

168.34

170.93
173.52
176.11
178.70
181.29

183.88
186.47
189.06
191.65
194.24

196.83
199.42
202.01
204. 60

207.19

209.78
212.37
214.96
217.55
220.14

€

bo bp be
ow s=t
eb Ww

~I ol bo

22.

25.¢
27.
230.50
233.09

235.68
238.27
240.86
243.45
246.04

248.63

_ 251.22

253.81
256.40
258.99

Austrian
Sq. Miles.

2.75
2.79
2.84
2.88
2.93

2.97
3.02
3.06
3.11
3.15

3.20
3.24
3.29
3.33
3.98

3.42
3.47
3.51
3.56
3.60

3.65
3.69
3.74
3.78
3.83

3.87
3.92
3.96
4.01
4.05

4.10
4.14
4.19
4.23
4,28

4.32
4.37
4.41
4.46
4.50

Prussian
Sq. Miles.

2.78
2.83
2.88
2.92
2.97

3.01
3.06
3.10
3.15
3.20

3.24
3.29
3.33
3.38
3.42

3.47
3.51
3.56
3.61
3.65

3.70
3.74
3.79
3.83
3.88

3.93
3.97
4.02
4.06
4.11

4.15
4.20
4.25
4.29
4.34

4.38
4.43
4.47
4.52
4.56

|
French |Geograph’l| Ryssian

German Nautical
Sq. Miles. Square Square or Nautical
15=1° Eq. Leagues. Leagues. | Sq. Miles.
20=1° Eq. | 25=1° Eq. | 60=1° Eq.
2.87 5.10 7.97 45.91
2.92 5.18 8.10 46.66
2.96 5.27 8.23 47.41
3.01 5.35 8.36 - 48.16
3.06 5.44 8.49 48.92
3.10 5.52 8.62 49.67
3.15 5.60 8.75 50.42
3.20 5.69 8.88 51.17
3.25 5.77 9.02 51.93
3.29: 5.85 9.115 52.68
3.34 5.94 9.28 53.43
3.39 6.02 9.41 54.18
3.44 6.10 9.54 54.94
3.48 6.19 9.67 55.69
3.53 6.27 9.80 56.44
3.57 6.35 9.93 59
3.62 6.44 10.05 57.95
3.67 6.52 10.19 58.70
3.72 6.61 10.32 59.45
3.76 6.69 10.45 60.20
3.81 6.77 | 10.58 | 60.96
3.86 | 6:86 | 10.71 | s6Doza
3.90 6.94 10.84 62.46
3.95 7.02 10.97 63.22
4.00 7.11 Edd 63.97
4.05 719 | Wee | 64.72
4.09 7.27 11.37 65.47
4.14 7.36 11.50 66.23
4.19 7.44 11.63 66.98
4,23 U53 11.76 67.73
4.28 7.61 11.99 68.48
4.33 7.69 12.02 69.24
4.37 7.78 12.15 | "69299
4.42 7.86 12.28 70.74
4.47 7.94 12.41 71.49
4.52 8.03 12.54 72.25
4.56 8.10 12.67 73.00
4.61 8.19 |- 12.80 73.15
4.66 8.28 12.93 74.50
4.70 8.36 13.07 75.26

114

Square
Wersts.

138.82
141.10
143.37
145.65
147.93

150.20
152.48
154.75
157.03
159.31

161.58

163.86
166.13
168.41
170.68

172.96
175.24
177.51
LAOS
182.06

184.34
186.61
188.89
LOMA
193.44

195.72
197.99
200.27
202.55
204,82

207.10
209.37
211.65
213.92
216.20

218.48
220.75
223.03
225.30
227.58

IX. SQUARE WERSTS INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES. 561
Ane Sq. Kilo- | Austrian | Prussian Seo iiee, “square nade oe Heaneal ee
Wersts. metres. | Sq. Miles. | Sq. Miles. | }5_j0 Eq. se ne pes cane ee Miles.

1,000 .| 1188.021} 19.77570| 20.05737) 20.66765| 36.74250| 57.41015| 330.6825] 439.4083
2,000 | 2276.042| 39.55140| 40.11473) 41.33531) 73.48499|114.8203 | 661.3649) 878.8166
3,000 | 3414.062| 59.32710! 60.17210| 62.00296)110.2275 \172.2304 | 992.0474!1318.225
4,000 | 4552.083/ 79.10279) 80.22946] 82.67061|146.9700 |229.6406 |1322.730 |1757.633
5,000 | 5690.104| 98.87849 100.2868 |103.3383 [183.7125 |287.0507 |1653.412 |2197.041
6,000 | 6828.125)118.6542 |120.3442 |124.0059 |220.4550 |344.4609 |1984.095 |2636.450
7,000 | 7966.146)138.4299 140.4016 |144.6736 |257.1975 |401.8710 |2314.777 |38075.858
8,000 | 9104.166)158.2056 |160.4589 |165.3412 |293.9400 [459.2812 |2645.460 |3515.266
9,000 |10242.19 |177.9813 |180.5163 |186.0089 |330.6825 |516.6913 |2976.142 /3954.675
10,000 |11380.21 |197.7570 200.5737 |206.6765 |367.4250 574.1015 |3306.825 |4394.083
100 113.80 | 1.98 2.01 2.07 3.67 5.74 33.07 43.94
200 227.60 3.96 4.01 4.13 7.35 11.48 66.14 87.88
300 341.41 5.93 6.02 6.20 11.02 17.22 99.21 131.82
400 455.21 7.91 8.02 8.27 14.70 22.96 132.27 | 175.76
500 569.01 9.89 10.03 10.33 18.37 28.71 165.34 | 219.70
600 682.81 | 11.87 12.03 12.40 22.05 34.45 198.41 263.64
700 796.61 | 13.84 14.04 14.47 25.72 40.19 231.48 307.59
800 910.42 | 15.82 16.04 16.53 29.39 45.93 264.55 351.53
900 1024.21 | 17.80 18.05 18.60 33.07 51.67 297.61 395.47
1000 | 1138.02 | 19.78 20.06 20.67 36.74 57.41 330.68 | 439.41
1 1.14} 0.02 0.02 0.02 0.04 0.06 0.33 0.44
2 2.28 0.04 0.04 0.04 0.07 0.11 0.66 0.88
3 3.41 0.06 0.06 0.06 0.11 0.17 0.99 1.32
4 4,55 0.08 0.08 0.08 0.15 0.23 1.32 1.76
5 5.69 0.10 0.10 0.10 0.18 0.29 1.65 2.20
6 6.83 | 0.12 0.12 0.12 0.22 0.34 1.98 2.64
7 eon 0.14 0.14 0.14 0.26 0.40 2.31 3.08
8 9.10 0.16 0.16 0.17 0.29 0.46 2.65 3.52
9 10.24 0.18 0.18 0.19 0.33 0.52 2.98 3.95
10 11.38 0.20 9.20 0.21 0.36 0.57 3.31 4.39
et 12.52 0.22 0.22 0.23 0.40 0.63 3.64 4.83
12 13.66 0.24 0.24 0.25 0.44 0.69 3.97 5.27
13 14.79 0.26 0.26 0.27 0.48 0.75 4.30 5.71
14 15.93 0.28 0.28 0.29 0.51 0.80 4.63 6.15
15 17.07 0.30 0.30 0.31 0.55 0.86 4.96 6.59
16 18.21 0.32 0.32 0.33 0.59 0.92 5.29 7.03
17 19.35 0.34 0.34 0.35 0.62 0.98 5.62 7.47
18 20.48 0.36 0.36 0.37 0.66 1.03 5.95 WL
19 21.62 0.38 0.38 0.39 0.70 1.09 6.28 8.35
20 22.76 0.40 0.40 0.41 0.73 PS 6.61 8.79
Ei 115

562

SQUARE WERSTS INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES,

Russian

square | Shores | Sq. Miles, | Sq, Miles.
21 23.90 0.42 0.42
22 25.04 0.44 0.44
23 26.17 0.45 0.46
24 27.31 0.47 0.48
25 28.45 0.49 0.50
26 29.59 0.51 0.52
27 30.73 0.53 0.54
28 31.86 0.55 0.56
29 33.00 0.57 0.58
30 34.14 0.59 0.60
31 35.28 0.61 0.62
32 36.42 0.63 0.64
33 37.95 0.65 0.66
34 38.69 0.67 0.68
35 39.83 0.69 0.70
36 40.97 0.71 0.72
37 42.11 0.73 0.74
38 43.24 0.75 0.76
39 44.38 0.77 0.78
40 45.52 0.79 0.80
4l 46.66 0.81 0.82
42 47.80 0.83 0.84
43 48.93 0.85 0.86
44 50.07 0.87 0.88
45 51.21 0.89 0.90
46 52.35 0.91 0.92
47 53.49 0.93 0.94
48 54.62 0.95 0.96
49 55.76 0.97 0.98
50 56.90 0.99 1.00
51 58.04 1.01 1.02
52 59.18 1.03 1.04
53 60.32 1.05 1.06
54 61.45 1.07 1.08
55 62.59 1.09 1.10
56 63.73 Tous 1.12
57 64.87 1.13 1.14
58 66.01 1.15 1.16
59 67.14 Deh? 1.18
60 68.28 1.19 1.20
E

German
Sq. Miles.
15=1° Kq.

0.43
0.45
0.48
0.50
0.52

0.54
0.56
0.58
0.60
0.62

0.64
0.66
0.68
0.70
0.72

0.74
0.76
0.79
0.81
0.83

0.85
0.87
0.89
0.91
0.93

0.95
0.97
0.99
1.01
1.03

1.05
1.07
1.10
1.12
1.14

1.16
1.18
1.20
1.22
1.24

116

Nautical
Square
Leagues.

0.77
0.81
0.85
0.88
0.92

0.96
0.99
1.03
1.07
1.10

1.14
1.18
1.21
1.25
1.29

1.32
1.36
1.40
1.43
1.47

1.51
1.54
1.58
1.62
1.65

1.69
1.73
1.76
1.80
1.84

1.87
191
1.95
1.98
2.02

2.06
2.09
2.13
2.17
2.20

French |Geograph’l
or Nautical
Sq. Miles.
20=1° Eq. | 25=1°9 Eq. | 60==1° Eq.

Square
Leagues.

1.21
1.26
1.32
1.38
1.44

1.49
1.55
1.61
1.66
1.72

1.78
1.84
1.89
1.95
2.01

2.07
2.12
2.18
2.24
2.30

2.35
2.41
2.47
2.53
2.58

2.64
2.70
2.76
2.81
2.87

2.93
2.99
3.04
3.10
3.16

3.21
3.27
3.33
3.39
3.44

6.94
7.28
7.61
7.94
8.27

8.60
8.93
9.26
9.59
9.92

10.25
10.58
10.91
11.24
11.57

11.90
12.24
12.57
12.90
13.23

13.56
13.89
14.22
14.55
14.88

15.21
15.54
15.87
16.20
16.53

16.86
17.20
17.53
17.86
18.19

18.52
18.85
19.18
19.51
19.84

English
Square
Miles.

9.23
9.67
10.11
10.55
10.99

11.42
11.86
12.30
12.74
13.18

13.62
14.06
14.50
14.94
15.38

15.82
16.26
16.70
17.16
17.58

18.02
18.46
18.89
19.33
19.77

20.21
20.65
21.09
21.53
21.97

22.41
22.85
23.29
23.73
24.17

24.61
25.05
25.49
25.93
26.36

563

SQUARE WERSTS INTO DIFFERENT GEOGRAPHICAL SQUARE MEASURES.

Russian
Square
Wersts.

Sq. Kilo-
metres.

Austrian
Sq. Miles.

Prussian
Sq. Miles.

German
Sq. Miles.
15=1° Eq.

Nautical
Square
Leagues.

20=1° Eq. | 25=1° Eq.

French
Square
Leagues.

Geograph’!

or Nautical
Sq. Miles.
60=1° Kq.

a | | | ee a

76
ie
78
79
80

81
82
83
84
85

86
87
88
89
90

91
92
93
94
95

96
97
98
99
100

1.40
1.42
1.44
1.46
1.48

1.50
1.52
1.54
1.56
1.58

1.60
1.62
1.64
1.66
1.68

1.70
1.72
1.74
1.76
1.78

1.80
1.82
1.84
1.86
1.88

1.90
1.92
1.94
1.96
1.98

1.32
1.34
1.36
1.38
1.40

1.42
1.44
1.46
1.48
1.50

1.52
1.54
1.56
1.58
1.60

1.62
1.64
1.66
1.68
1.70

1.72
1.74
1.76
1.78
1.80

1.83
1.85
1.87
1.89
1.91

1.93
1.95
oi
1.99
2.01

1.36
1.38
1.41
1.43
1.45

1.47
1.49
1.51
1.53
1.55

1.57
1.59
1.61
1.63
1.65

1.67
1.69
1.72
1.74
1.76

1.78
1.80
1.82
1.84
¢1.86

1.88
1.90
1.92
1.94
1.96

1.98
2.00
2.03
2.05
2.07

2.24
2.28
2.31
2.35
2.39

2.43
2.46
2.50
2.54
2.57

2.61
2.65
2.68
2.72
2.76

2.79
2.83
2.87
2.90
2.94

2.98
3.01
3.05
3.09
3.12

3.16
3.20
3.23
3.27
3.31

3.34
3.38
3.42
3.45
3.49

3.53
3.56
3.60
3.64
3.67

3.79
3.85
3.90
3.96
4.02

4.08
4.13
4.19
4.25
4.31

4.36
4.42
4.47
4.54
4.59

4.65
4.71
4.77
4.82
4.88

4.94
4.99
5.05
5.11
5.17

5.22
5.28
5.34
5.40
5.45

5.51
5.57
5.63
5.68
5.74

25.13
25.46
25.79
26.12
26.45

26.79
27.12
27.45
27.78
28.11

28.44
28.77
29.10
29.43
29.76

30.09
30.42
30.75
31.08
31.41

31.75
32.08
32.41
32.74
33.07

PT

English
Square
Miles.

26.80
27.24
27.68
28.12
28.56

29.00
29.44
30.88
30.32
30.76

31.20
31.64
32.08
32.52
32.96

33.40
33.83
34.27
34.71
35.15

35.59
36.03
36.47
36.91
37.35

37.79
38.23
38.67
39.11
39.55

39.99
40.43
40.86
41.30
41.74

42.18
42.62
43.06
43.50
43.94

TABLE FOR COMPARING THE MOST IMPORTANT MEASURES OF SURFACE.

564

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565

METEOROLOGICAL TABLES.

SERIES VL

METEOROLOGICAL CORRECTIONS,

OR

TABLES

FOR CORRECTING SERIES OF OBSERVATIONS FOR THE PERIODIC

AND NON-PERIODIC VARIATIONS.

RSOTAT./

ae

f ‘ Ei a ki .—F :
Ae Ze. PHI We Ree f sartaamade 10 | *

HPD A SS Tishens a HEOH wae” Je

ui

567

CONTENTS:

[The figures refer to the folio at the bottom of the page.— The letters near them mean, D. = calculated by Dove ;
Gl. = Glaisher; G. = Guyot; L. = Lefroy. For the letters before the latitudes, see page 12.]

Temperature.
Hourly Corrections for Periodic Variations.

NORTH AMERICA.

Station. Latitude. Scale. Page.

Taste J. Washington, District Columbia, Bi. 38 54N. Reau. D. 15
« JI. Philadelphia, Girard College, A’3s. 39 58N. Reau. D. 15
«© T[I. Philadelphia, Girard College, A’3. 39 58 N. Fahr. G. 16
« JV. Frankfort Arsenal, Penn., Co Sor 57 No 6Reaus De) ly,
«“ V. Frankfort Arsenal, Penn., Go 's0r57 Nc) Fant. Ds 18
“ VI. Toronto, Canada West, Bo 74340 N” Fair. <0: 19
« VII. Toronto, Canada West, . B. 43 40N. Reau. D. 20
“ VIII Toronto, Canada West, A’s. 43 40N. Fahr. L. 21
“ JX. Toronto, Canada West, A’s. 43 40 N. Reau. D. 22
« X, Montreal, Canada East, A‘. 45 30N. Fahr. G. 22
“« XI. Sitka, Alaska, A's. 57 3N. Reau. D. 23
“© XII. Boothia Felix, Arctic America, A. 69 59N. Reau. D. 24
“ XIII. Lake Athabasca, Arctic America, Ge" 59 N. Fahr. L. 25
“ XIV. Melville Island, Arctic America, C 74 47N. Reau. D. 25
“ XV. Hecla Cove, Spitzbergen, C 79 55 N. Reau. D. 25

Appendix.
« V’, Amherst College, Mass., An. 42 22N. Fahr. D. 28
SOUTH AMERICA.

“© XVI. Rio Janeiro, Brazil, Cc. 2254S. Fahr. D. 26
«“ XVII. Rio Janeiro, Brazil, C. 22548. Reau. D. 27

F 3

568

TasLe XVIII.
XIX.
XX.
XXI.
XXII.
XIE
XXIV.
XXV.

66

XXVI.

XXVIL.
XXVIII.

XXIX.

XXX.
XXXI.
XXXII.
XXXII.

XXXIV.
XXXV.
XXXVI.
XXXVIL.
XXX VIII.
XXXIX.
XL.

XLI.

XLII.

XLII.
XLIV.
XLV.
XLVI.
XLVII.
XLVIIL.

_ XLIX.

L.

LI.

LIL.
LUL.
LAY;

LV.
LVI.

CONTENTS,

ASIA.
Station.

Trevandrum, India,
Trevandrum, India,
Madras, India,
Madras, India,
Bombay, India,
Bombay, India,
Madras, India,
Bombay, India,
Calcutta, India,
Tiflis, Georgia,
Peking, China,
Nertchinsk, Siberia,
Nertchinsk, Siberia,
Barnaul, Siberia,
Barnaul, Siberia,

Barnaul, Siberia,

EUROPE.

Rome, Italy,

Padua, Italy,

Geneva, Switzerland,
Geneva, Switzerland,
St. Bernard, Switzerland,
St. Bernard, Switzerland,
Kremsmiinster, Austria,
Salzburg, Austria,
Munich, Bavaria,
Prague, Bohemia,
Prague, Bohemia,
Plymouth, England,
Plymouth, England,
Brussels, Belgium,
Brussels, Belgium,
Schwerin, Germany,
Miihlhausen, Prussia,
Utrecht, Holland,
Greenwich, England,
Greenwich, England,
Greenwich, England,
Halle, Prussia,
Gottingen, Hanover,

Latitude.

°
8
8
13
13
18
18
13
18
22
41
39
51
51
53
53
53

41
45
46
46
45
45
48
47
48
50

50
50
50
50
53
51
52
51
51
51
51
51

31 N.
31 N.
4N.
4N.
56 N,
56 N.
AN.

56 N.

33 N.

41 N.
54 .N.

18 N.
18 N.
20 N.
20 N.
20 N.

54 N.
24 .N.

12 N.

12 N.
52 N.

52 N.

3N.

48 N.
SEN:
5.N.
5 N.

22 N:

22,N,

51 N.

51 N.

36 N.

13 N.
DN.

29 N.

29 N.

aUUN.

30. N.

32 N.

Scale.

Fahr.

Reau.

Fahr.

Reau.

Fahr.

Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Fahr.
Reau.
Reau.

Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Fahr.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.

Fahr.

Reau.
Reau.

BOSE ePseeesreyyys

PSPSPS esSyryysyyyssyoryyrysyyyy

Page.
31
32
33
34
35
36
37
37
38
39
39
40
41
42
43
Ak

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CONTENTS,

Station. Latitude.
Berlin, Prussia, A. 52 30N.
Salzuflen, Germany, Ae 52 SUN,
Stettin, Germany, _ A’... 53 25 N.
Apenrade, Sleswick, C 55 3N.
Leith, Scotland, A. 85, 59: N.
Leith, Scotland, Far nthe eo: OO,
Makerstoun, Scotland, A’3. 55 36 N.
Dublin, Ireland, Bia. 53 23 N.
Catharinenburg, Russia, A. 56 50N.
Catharinenburg, Russia, A’6. 56 50 N.
St. Petersburg, Russia, A‘10. 59 56 N.
Helsingfors, Finland, A’3. 60 10 N.
St. Petersburg, Russia, A. °°59756'N.
Helsingfors, Finland, C. 60 10N.
Christiania, Norway, GC: » 59°55, N:
Drontheim, Norway, Cc. 63 26N.,
Strait of Kara, Russia, A 70 37N.
Matoschkin Schar, Novaia Zemlia, A. 73 N.
Bossekop, Norway, C. 69 58 N.
Bossekop, Norway, C. 69 58N.

AFRICA AND AUSTRALIA.
St. Helena, Africa, 1 Ge a a Se
Cape of Good Hope, Africa, Ah Se DOS:
Hobarton, Tasmania, A's. 42 53S.

Monthly Corrections for Non-periodic Variations.

Station.
Madras, India,
Palermo, Sicily,
Milan, Italy,
Geneva, Switzerland,
Vienna, Austria,
Ratisbon, Austria,
Stuttgart, South Germany,
Carlsruhe, South Germany,
Berlin, Prussia,
Copenhagen, Denmark,
Paris, France,
Zwanenburg, Holland,
London, England,

Latitude.
13° 4N.
38 7N.
45 28 N.
46 12N.
48 13N.
49 1N.
48 46 N.
49 1N.
52 30 N.
55 41 N.
48 50 N.
52 23 N.
51 30 N,

Scale.
Reau.
Reau.
Reau.
Reau.
Fahr.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.

» Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.

Centig.

Reau.
Reau.
Reau.

Scale.

Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
Reau.
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Reau.

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569
Page.
65
66
67
68
69
70
71
71
72
73
73
74
75
76
77
78
79
80
81
81

85
85

. 86

Page.
90
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92
94
96
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99

100
102
105
107
108
110

570

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CONTENTS.

Station.
Kinfauns Castle, Scotland,
Tornea, Finland,
Albany, N. Y., North America,
Salem, Mass., North America,
Reikiavik, Iceland,
Godthaab, Greenland,

Latitude.

56 24 N.
65 50 N.
42 39 N.
42 31 N.
64 8N.
64 10 N.

Force of Vapor and Relative Humidity.

Hourly Corrections for Periodic Variations.
Y

Greenwich, England, Force of Vapor, by Glaisher,

Scale.

Reau.
Reau.
Reau.
Reau.
Reau.
Reau.

Greenwich, England, Relative Humidity, by Glaisher,

Sooo.

Tage.
112
112
113
114
115
115

119
120

571

METEOROLOGICAL CORRECTIONS.

One of the prominent objects of a prolonged series of meteorological observations
is to determine the mean condition of the atmosphere, during a given interval of
time, such as a day, a month, or a year, as to its temperature, moisture, and baro-
metric pressure. In order to furnish the true means of these elements, free from the
periodic changes which depend upon the daily course of the sun and upon the seasons,
the observations ought to be made at equal intervals of time, and be so often repeated
as actually to represent the sum of the variations which took place during the stated
time. It is generally admitted that observations taken at every one of the twenty-
four hours of the day give means which do not sensibly differ from the means
which would be obtained from a still larger number of observations during the same
time ; so that means derived from hourly observations may be considered as the true
daily, monthly, and annual means of the year in which the observations were
taken.

However, as the means of a given month, or year, will generally be found some-
what to differ from those of another year, at the same place, from causes which are
not of a periodic nature, it is obvious that the absolute means can only be derived
from the means of a series of years, in which the differences arising from these non-
periodic variations may be considered as sufficiently balancing each other.

Hourly observations can be expected only from a very few stations, favored with

‘peculiar arrangements for the purpose. By far the larger number of observers must
necessarily confine themselves to three or four observations a day. The means,
therefore, deduced from such a set of observations, generally differ from the true
means which would be given by hourly observations, by a quantity which varies
with the hours selected for the observations. If that quantity, however, is known by

having been previously determined for every hour, or set of hours, by a long series

F 7

572 METEOROLOGICAL .CORRECTIONS.

of hourly observations taken at some station in a similar climatic situation, it is evident
that, whatever be the hours at which observations are taken, the means derived from
them can always be reduced to the true means by correcting them for that dif:
ference.

The following tables furnish such corrections, both for periodic and non-periodic
variations of temperature, and for stations situated in various latitudes. They give
the quantities which must be added to, or subtracted from, the hourly means, in order
to obtain the true means of the day, of the month, and of the year.’

Two tables of the same description, for moisture, which may be considered as
specimens of the kind, close the set.

Two other tables, for correcting the mean barometric pressures, are found at the

end of the Hypsometrical Tables, pp. 92, 93.

573

CORRECTIONS FOR TEMPERATURE.

HOURLY CORRECTIONS FOR PERIODIC VARIATIONS,

OR

TABLES

FOR REDUCING THE MEANS OF THE OBSERVATIONS TAKEN AT ANY HOUR OF
THE DAY TO THE TRUE MEAN TEMPERATURE OF THE DAY, OF
THE MONTH, AND OF THE YEAR.

575

HOURLY CORRECTIONS FOR PERIODIC VARIATIONS,

OR

CORRECTIONS TO BE APPLIED TO THE MEANS OF THE HOURS OF OBSERVATION, OR
SETS OF HOURS, IN ORDER TO OBTAIN THE TRUE MEAN TEMPERATURES
OF THE RESPECTIVE DAYS, MONTHS, AND OF THE YEAR.

Tue following set contains all the tables for correcting the means of observations
on atmospheric temperature for the effect of diurnal variation which have been pub-
lished by Dove, together with a few others of the same description. Dove’s tables
are found in two papers, published in the Memoirs of the Royal Academy of Berlin
for 1846 and for 1856, and in the first Report on the Observations of the Meteoro-
logical Institute of Prussia, Berlin, 1851.

In the first paper are twenty-nine tables, in Reaumur’s scale, nine of which have
been republished, in Fahrenheit’s scale, in the Proceedings of the British Associa-
tion for 1847, and will also be found below. In that series the corrections have
been formed by finding first the differences between the hourly and the true means,
and then computing the observations by Bessel’s formula, in order to eliminate the
accidental irregularities due to the shortness of the period during which the observa-
tions were taken. Calling 2 the horary angle reckoned from noon, Bessel’s for-
mula is

te = u-+w' sin (x + U’') + uv" sin (2 2+ U") + wu sin (82 + U"),

The stations at which hourly observations were made are Trevandrum, Madras,
Bombay, Salzuflen, Prague, St. Petersburg, Catharinenburg, Barnaul, Nertchinsk,
Matoschkin-Schar, Strait of Kara, and Boothia Felix. Bi-hourly observations were
taken at Brussels, Greenwich, and Toronto ; in all others the night observations are
wanting, and were obtained by interpolation. Moreover, in several stations the num-
ber of observations was small, at Madras even only thirty-six days. The tables of
that series may be readily distinguished from those belonging to the same stations in
the second, by their containing the corrections for several sets of hours, which are
not found in the tables of the other.

In Dove’s second series, and in all other tables, the corrections given are simply
the differences, with reverse signs, between the hourly and the true means, excepting,
however, the stations of Toronto, in which the corrections were computed, by Bes-
sel’s formula, by Colonel Sabine ; of Prague, by Jelineck ; of Salzburg, and those of
Geneva and St. Bernard, by Plantamour.

The observations from which these tables are derived were made hourly at Hobar-
ton during 8 years; at the Cape of Good Hope, for 5} years; St. Helena, 5 years;
Madras, 5 years ; Bombay, 4 years ; Calcutta, 11 years; Toronto, 6 years; Phila-
delphia, 3 years; Makerstoun, 3 years; Utrecht, 1? years; Prague, 101 years;
Munich, 7 years ; Salzburg, 6 years; St. Petersburg, 10 years; Catherinenburg, 6
years ; Barnaul, 5 years; ‘Tiflis, 4 years; Nertchinsk, 6 years; Peking, 4 years ;
Sitka, 5 years. In the following stations the observations were bi-hourly : — Wash-
ington, for 14 years; Greenwich, 7 years ; Dublin, 4 years; Brussels, 9 years ; Ge-
neva and St. Bernard, 4 years ; Schwerin, 3 years.

The observations made in England, and in her colonies, are found in the various
government publications. Those of the Russian stations are taken from the Annuaire
Meétéorologique et Magnétique des Ingénieurs des Mines, and in the Annales de

F 11

576 HOURLY CORRECTIONS FOR PERIODIC VARIATIONS.

V Observatoire Physique Central de Russie. The observations made at Prague, Mu-
nich, Geneva, with those at St. Bernard, Makerstoun, Greenwich, Brussels, and Wash-
ington, were published by their respective Observatories ; those of Utrecht, by Buys-
Ballot; of Dublin, by Lloyd, in his Notes on the Meteorology of Ireland ; those of
Schwerin were communicated in manuscript by Dippe ; the observations at Melville
Island are published in No. 42 of the Parliamentary papers for 1854; and those at
Bossekop, by Martins and Bravais, in the Voyage de la Commission Scientifique du
lord.

The tables of this second series being mostly deduced from longer series of obser-
vations than those in the first, when the same station is found in both, the table in the
second is generally to be preferred.

Glaisher’s table for Greenwich has been taken from the Greenwich Observations.
Captain Lefroy kindly furnished the tables for Toronto and Lake Athabasca. To
him the author is also indebted for the observations made at Montreal by Mr. McCord,
from which ‘Table X. was computed. ‘Table III., for Philadelphia, was deduced by
the writer from the observations made at Girard College under the direction of Prof.
A. D. Bache.

In order to facilitate the selection of the tables, they are marked in the table of
contents with capitals, which have the following signification : —

A and B mean that the tables have been derived from hourly and bi-hourly obser-
vations, and have been computed by Bessel’s formula; C, that the tables contain
values obtained by interpolation.

A’, B’, and C’ indicate the tables based respectively on hourly and bi-hourly or
partly interpolated observations, which give simply the differences between the hourly
and the true means.

The figures added to the letters indicate the number of years during which the
observations used in forming the table were carried on. The stations are arranged,
in each continent, in the order of their latitude.

Use oF THE TABLES.

In order to reduce meteorological means obtained from any set of hours to the true
means, the table best suited to the purpose must first be selected. The diurnal vari-
ation changing with the seasons, the latitude, the altitude, and the distance from the
sea-shore, the station which comes nearest, in all these respects, to the station the
observations of which are to be corrected,, must be adopted.

Suppose the thermometer has been observed at Baltimore, during the month of
January, at 7 A. M., 1 P. M., and 7 P. M., and the monthly means of these hours to
be respectively 27°, 35°, and 31° Fahrenheit. We take Table III., Philadelphia, it
being the nearest in latitude and climatic situation. We find the correction for the
hours 7, 1, and 7, and we have

Observed Means. Corrections. True Means.
For.7.A;M... 27°. = 3°.63.. =" 30°.63
For | P: M: oe 23 87 =. 3113
For 7 P. M. 3b a= HOLS, = — Soe

Sums, 93° — 1 S7. ==, 91°63

Means, 31° — 0°.46 30°.54 True Mean for January.

It is obvious that the corrections can be applied, either separately to each hour, as
is done above, or collectively, in taking the mean of the three hourly corrections and
applying it to the mean of the three observations, as in the last line, which is the more
convenient method. Therefore, in order to find the correction for any set of hours,
it suffices to take the mean of the corrections given in the table for the hours compos-
ing the set. The true daily means can be found in the same way, and the true yearly
means can be derived from the corrected monthly means, or by applying the correc-
tions given in the last column.

F 12

517

HOURLY CORRECTIONS

PERLODIC NAR Te ELON Ss:

NORTH AMERICA. —SOUTH AMERICA.

13

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579

Lat. 38° 54’ N. Long. 77° 3’ W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hour Jan Feb. ‘Mareh.| April. | May. | June. July. | Aug. | Sept. | Oct. | Nov. | Dec. | Year.
|A.mM.012/]) 1.15 1.26. 1.60) 1.95, 2.33) 2.87 2.04 2.31| 2.39| 1.73| 0.85| 0.96] 1.86
212'|| 1.28} 1.86! 2.14| 2.40: 3.15} 3.21) 3.25) 3.07| 2.75] 2.27) 1.34) 1.12] 2.32
412) 1.45) 2.18 2.67) 2.75) 3.56) 3.64) 3.83 3.49) 3.15) 2.89) 1.92) 1.54) 2.76
6 12/|| 1.88] 2.32) 2.76] 2.59) 2.20) 2.23) 2.12) 2.81] 3.02| 3.19| 2.18) 1.81 | 2.43)
8 12'|| 1.48| 1.76 1.68] 1.05, 0.32 -0.16) 0.09, 0.28| 1.04) 1.69| 1.88) 1.68 | 1.07
10 12/||—0.18 —0.58 —0.88 Rie 1.82 -1.32 -1.81 |-1.31 |—1.25 |—0.17 |-0.15 |-0.96
| | |
P.M. 0 12'||-1.47 —2.05 —2.36 —2.39 —2.64 —2.69 —2.55 —2.97 —2.92 |—2.89 1.90 —1.57 |—2.37
2 12! ||-2.60 |-3.15 |-3.35 -3-41 3.57 —3.84 -3.49 —3.83 3.74 /—3.64 —2.44 —2.50 —3.30
412! —2.32 3.05 —3.20 3.51 3.66 4. 29 |-4.16 —3.59 —3.65 |\—3.29 —2.08 —2.19 |—3.25
6 12! || -0.76 —1.25 —1.73 —2.18 —2.44 —1.60 |-2.24 —1.74 —1.88 |—1.84 |—1.59 1.01 |-1.69
8 12'||-0.23 0.02 0. 05 0.06 0.27| 0.44 —0.21 —0.26 —0.23| 0.18 |—0.22 —0.26 |-0.04
10 12’|| 0.33) 0.69) ee 1.42) 1.67] 2.04] 1.26] 1.79) 1.41| 0.98| 0.23) 0.43) 1.08
eC —— a _
Means, || 1.32 | 1.52 | 6.26 9. 02 | 12. 64 18.34, 19.29 17.78) 16. 04 7.47-| 5.20 | 1.63
Il.
N. Amertca.—Puitapetpuia. Lat. 39° 58’ N. Long. 75° 11’ W. Gr.— Dove.
Degrees of Reaumur.
| Tour. | Jan. | Feb ' Mareh.. April. May. | June. | July. | Aug. | Sept Oct. Nov Dec. | Year.
| midn. | 0.64| 1.27! 1.33] 1,81| 2.06] 2.84! 2.10| 1.94) 2.12| 1.70/ 1.31] 0-62|| 1.60
1 0.94] 1.48, 1.61] 2.20] 2.32) 2.63] 2.45, 2.19, 2.04| 1.87] 1.22] 0.81/| 1.81
2 1.00| 1.67! 1.85) 2.58) 2.64) 2.86; 2.69 seu 2.22| 2.18 |" 1.43 0.98 | 2.04)
3 1.13} 1.95; 2.00] 2.76] 2.96! 3.20! 2.88] 2.44) 2.43] 2.36] 1.50) 1.12) 2.23)
4 1.24| 2.05) 2.08] 2.97] 3.27; 3.40! 3.04] 2.74 2.56| 2.58] 1.74) 1.28! 2.41]
| | | i 1 | aN
5 1.36, 248 2.50| 3.06| 3.32] 3.28] 3.11| neh 2:68) o2078)|_ 183) 1.38) 2-93)
6 1.50 2.24 2.44 2.84! 2.63) 2.54) 2.56/ 2.64] 2.65] 2.95] 1.89] 1.44] 2.36]
7 1.60) 2.28] 2.24) 2.15] 1.68] 1.45! 1.53] 1.84] 1.92} 2.40! 1.88] 1.36|| 1.86
S | 1.40) 1.46) 1.26) 1.17) 0.65) 0.40) 0.54) 0.67) 0.75) 1.08) 1.21) 1.14) 0.98
9 |, 0.78| 0.57; 0.35| 0.23 /—0.39|—0.52—0.36 —0.20 —0. 18 | —0.15 0.26| 0.52|| 0.03}
10 | 0.02 -0.39 —0.46 —0.71 —1.06/—1.23 -1.00. (71.05 -1. 08 | —1.17 | —0.56 | —0.22 | -0.74,
11 fetes ptt lee —1.54/-1.74|—1. fee 74 -1. 84 —1.90 1.96 | —1.27 —0.92 |-1.50
| |
| |
Noon. | —1.21/—1.77 —1.97 ,—2.16|—2.24 —2. 51 2.2 26 —2 34 |— —2.45 | —2.61 | —1.77 | —1.28 ||—-2.05,
1 | —1.73|—2.36 /-2.45 —2.86|—2.71 —3.06 —2. -66)—2. 67 —2.88 —3.14|/—2.26 —1.63|—-2.53,
2 | 2.04 '-2.66 —2.74 —3.29 —3.11) —3.32 —2. Pile O1 —3.22) 3.45 | —2.52 -1.84)/-2.85)
| | |
3 | -2.10/-2 82 —3.07 —3.42|—8.36 | —3.40 3.15 -3.11) —3.26 | 8.45 | —2.48 —1.85 |—2.96,
4 |-1. 93-2. 69 —2.99 —3.44|-3.46 —3. 44/3. 06 |-2. 98 | —3.17 | —3.33 | —2.24 | —1.63||—2.87
5 esate a? —3.14 3.26 —3.05 -2.94 —2.70 |-2.77 —2.46 1.46 —1.10|/—2.41
| | | | |
6 |-0. out .37/-1.60 —2.49 |—2.46 | —2.47|—2.30 —2.03 —1.77 —1.33 | —0.82 —0.64 |—1.68
7 | -0.51|—0.80 |—0.88 | —1.23|—1.28) 1. 38 -1.44 -1.02 —0.76 —0.52 | -0.33 —0.31 |—-0.87
8 |-0. 20-0. 21|—0. 20 —0.29 |—-0.06 0.06) 0.03. 0.01, 0.28, 0.18) —0.14 —0.04 —0.05
9 | 0.07] 0.11, 0.90, 0.35) 0.65 0.82 0. 57; 0.60 0.81| 0.65) 0.29) 0.09) 0.19
10 0.33] 0.48| 0.77) 0.93] 1.24] -1.37) 1.08 | 1.09/ 1.33] 1.24) 0.45| 0.27) 0.88
11 0.56 0.75) 0.96) 1.44] 1.74] 1.91) 1.55] 1.44] 1.64] 1.63] 0.79) 0.40'| 1.23
‘Mean. 0.30 | 1. 12 | 5.18 | 8.75 | 12.18) 16.22/ 18.19 17.52 14.66, 8.72 | 3.67 | 0.58 | |

F

The meee inoue sign must be added ;

15

fneee with the sign — must eh ied

580

II.

Nortu America. — PHivapELpuia. Lat. 39° 58’ N. Long.'75° 11! W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Guyor.

Degrees of Fahrenheit.

Hour. | Jan. | Feb. March. April. | May. | June. Sulyatl Aug. | Sept. | Oct. | Nov. | Dec. || Year.

f fe
Midnight | 1.47| 2.90, 2.90] 4.13] 4.68) 5.28) 4.70, 4.37| 4.47] 3.80] 2.70 1.40! 3.57
1 2.13| 3.37| 3.63| 4.88} 5.25) 5.93! 5.57) 4.93) 4.60] 4.17} 2.73 1.83! 4.08
2 2.20| 3.57) 4.17| 5.88] 5.95| 6.45) 6.10) 5.43) 5.00) 4.87| 3.20 2.20) 4.59
3 || 2.57| 4.43] 4.50] 6.28] 6.68] 7.23] 6.53| 5.50| 5.47) 5.27| 3.37) 2.53) 5 63

h- 2%
4 2.80| 4.67| 4.70) 6.75| 7.38] 7.68} 6.90] 6.17| 5.77| 5.77| 3.90 2.87| 5.45
5 3.07| 4.83| 5.63| 6.95| 7.48] 7.40] 7.03] 6.50) 6.03| 6.23} 4.10 3.10) 5.70
6 3.40| 5.10) 5.50) 6.45) 5.93) 5.73] 5.80| 5.93] 5.97] 6.60| 4.23 3.23) 5.32
7 3.63| 5.17| 5.03| 4.90, 3.80| 3.28] 3.50) 4.13] 4.33] 5.37 4.20, 3.07) 4.20
8 8.17| 3-33, 2.80| 2.50 1.48] 0.90) 1.27) 1.50) 1.93] 2.40 70 a 2.16
9 1.77| 1.33} 0.80| 0.58 —0.85|—1.15|—0.77| -0.43| —0.40|—-0.37| 0.57 1.17, 0.19
10 0.07/-0.83 1.03 —1.58 —2.38/—2.75 —2.20| —2.37/ -2. 43] -2.67 -1.27 0.50 —1.66
MH |+1.40 —2.63 —3.10 —3.40 -3.90 —4.33 —3.87! —4.13] —4.27| 4.43 -2.87 —2.07 -3.37

| |
Noon, |+2-70|-3.93|—4.43| —4.72' —5.03|—5.63 —5.03| —5.27| —5.50| —5.90 —4.00 ome
] —3.87|—5.27|/-5.50| —6.38 —6.08 —6.88 —5.93 —6.00| —6.47 —7.10 —5.10 —3.67) —5.69
2 |+4.57/-5.97/-6.17| -7.12 -6.98|-7.45 —6.63| —6.83| —7.20| -7.80/ —5.67 —4.13 —6.40
3 .|-4.70/-6.30|-6.90| —7.63 —7.55'| —7.63! —7.03| -7.00 —7.33|-7.80, —5.60 -4.17 -6.64

\|

1
4 |+4.43/-6.00|-6.72) -7.65 —7.78'-7.73 —6 83) -6.70 —7.13| 7.53) —5.07 -3.67|-6.44
5 |-2.90|-4.87/-5.67/ -7.00 —7.33 —6.85 —6.57| —6.07 —6.23| —5.57| 3.30) —2.47: —5.40
6 —|~2.03|-3.03/ 3.60) -5.55 —5.53 —5.55 —5.13' —4.57 —3.97) —3.03/-1.87/-1.43 —3.77
7 |+1.13/-1.77/-1.97| -2.70 —2.88] —3.10, —3.20, —-2.30, -1.70| —1.20| —0.77| -0.70 ,—1.95
8 |-0.43|-0.43/-0.43 —0.60'—0.13| 0.15} 0.08 0.03) 0.63| 0.37] 0.15/-0.10, -0.11
9 ll 0.17} 0.30) 0.73; 0.85) 1.48} 1.85 1.33) 1.37} 1.83} 1.43) 0.63} 0.20] 1.01
10 =|. 0.77] 1.13] 1.73} 2.15] 2.80) 3.10] 2.47| 2.47) 3.00] 2.77] 1.00] 0.60] 2.00
11 1.27] 1.72] 2.17 aa 3.93| 4.30] 3.53] 3.23] 3.70) 3.63] 1.77| 0.90, 2.78
6, 6 0.6" 1.01) 0.95' 0.45]! 0.20) 0.09) 0.34) 0.68) 1.00) 1.79] 1.18) 0.90) 0.78
7,7 1.2-| 1.70] 1.53) 1.10] 0.46] 0.09] 0.15} 0.92] 1.32} 2.09] 1.72) 1.19] 1.13
8,8 | 1.27| 1.43/ 1.18] 0.85] 0.68] 0.53] 0.67] 0.77] 1.01] 1.38} 1.35] 1.24) 1.04
9,9 || 0.97] 0.82 " 0.72) 0.82) 0.35) 0.28, 0.47) 0.72, 0.53 0.60, 0.69) 0.66
10,10 | 0.42] 0.15] 0.35 el 0.21] 0.18) 0.14) 0.05) 0.29) 0.05 -0.13 0.05] 0.17

|
7, 2,9 |-0.22-0.17 0.15 -0.53 -0.57) -0.77 —0.61)—0.44) —0.35 —0.33 —0.28 —0.29) —0.39
6, 2, 8 |—0.53/-0.13/-0.37 —0.42 —0.39| —0.52 —0.37) -0.29/ -0.20 —0.28 —0.43 —0.67) -0.41
6, 2, 10 |—0.13| 0.09] 0.53} al 0.58) 0.46, 0.55, 0.52) 0.59) 0.52 -0.15 -0.10) 0.44
6, 2, 6 |—1.07 —0.72/-1.42 —2.07 —2.19| —2.42) —1.43, -1.82)-1.73 -1.41 -1.10 -0.78) —1.44
7,2 |-0.47 —0.40|-0.57 —1.11 —1.59|—2.09) -1.57|—1.35 —1.44 —1.22 -0.74 —0.53 1.09
8,2 |—0.70 —1.32|-1.68| -2.31 —2.75| 3.28] —2.68| -2.67| 2.90 —2.70 —1.49 —0.78| 2.10
8,1 |-0.35 -0.97|-1.35 —1.94 —2.30|—2.99 —2.33, -2.25 aoe a. —0.55) —1.76
| |
7,1 |—0.12 -0.05|-0.24 -0.74 —1.14] -1.80 —1.22 —0.94 —1.07 —0.87 —0.45 —0.30) -0.75
9, 12, 3, 9 -1.37 —2.15|-2.45 —2.73 —2.99| 3.14 —2.88 —2.83 —2.85 -3.16 —2.39 -1.42),-2.53
F 16

IV.

581

N. America. — Franxrort Arsenat. Lat. 39°57’ N. Long. 75° 8’ W. Greenw.

Corrections to be applied to thé Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

— at DO bo

9.12.3.9
7. 2.2(9)

| Dail. ext.

1.82
2.13

2.31
2.25
1.88
1.22

0.34
—0.62
—1.54
—2.30

—2.85
—3.02
=2.92
—2.53

—1.90
—1.14
--0.37

0.29

0.76
1.02
1.13
1.19

0.56
0.76
0.76
0.55
0.20

—0.13
—0.16

008
—0.64

—0.57
—0.90
—0.82
—0.49

—1.03
0.10

—0.36

1.98
2.23

2.46
2.35
2.01
1.33

0.30
—0.72
-1.77
—2.60

—3 01
—3.18
—2.93
—2.44

eles
—1.11
—0.46

0.12

0.66
0.93
1.18
1.36

0.62
0.78
0.72
0.48
0.11

Usil7/
—0.24

0.03
—0.65

—0.59
—0.93
—0.84
—0.50

—1.14
0.04

—0.36

2.95
2.62
1.9]
0.94

—0.07
—1.00

—1.76
—2.32

—2.74
—3.01
—3.10
—2.95

—2.50
—1.78
—0.92
—0.06

0.61
1.05
1.31
1.48

0.42
0.50
0.44
0.27
0.03

—0.16
—0.15

0.22
=0-72
—0.55
—1.04

—0.90
—0.42

—1.22
—0.03

—0.08

1.87
2.33
2.88
3.29

3.31
2.83
1.94
0.85

—0.20
—1.05
—1.69
—2.22

aD
—3.19
—3.53
—3.55

3.11
—2.23
—1.09

0.02

0.85
1.32
1.50
1.62

0.30
0.42
0.43
0.33
0.13

—0.13
—0.11

0.32
—0.86

—0.63
ail aled)
—0.94
—0.39

—1.28
0.11

—0.12

2.60
3.05
3.43
3.57

3.32
2.65
1.66
0.57

—0.45
—e29
—1.97
—2.35

—3.07
—3.52
—3.78
—3.70

—3.20
—2.31
—1.19
—0.10

0.80
1.43
1.85

2.01

0.17
0.24
0.24
0.18
0.07

—0.35
—0.32

0.19
—1.06

—0.93
—1.48
—1.25
—0.71

—1.45
—0.07

—0.11

June.

3.41
3.73
3.92
3.84

3.36
2.46
1.26
—0.03

—).20
—2.11
—2.74
—3.17

—3.51
—3.77
—3.89
—3.75

—3.23
—2.33
—1.16

0.07

1.17
2.02
2.61
3.04

0.07
0.05
0.02
—0.02
—0.05

—0.45
—0.41

0.24
—1.21

—1.26
—1.90
—1.77
—1.13

—1.77
—0.04

0.02

F

July.

3.07
3.51
3.83
3.84

3.40
2.52
1.34
0.08

—1.06
—1.96
—2.64
—3.16

—3.58
—3.87
—3.94
—3.67

—3.00
—2.00
—0.83

0.28

17
1.79
2.24
2.63

0.26
0.26
0.18
0.06
—0.08

—0.45
—0.36

0.15
—1.12

—1.27
—1-90
—1.75
—1.12

—1.75
—0.05

—0.05

Aug.

2.69
3.04
3.32
3.36

2.99
2.21
1.15
0.01

—1.00
—1.78
—2.34
—2.78

—3.16
—3.48
—3.61
—3.42

—2.81
—1.83
—0.67

0.43

1.29
1.84
2.15
2.40

0.19
0.24
0.22
0.14
0.03

—0.35
—0.28

0.19
—1.03

—1.17
—1.74
—1.58
—1.10

—1.53
0.06

—0.13

Sept.

2.63
3.05
3.49
3.73

3.54
2.84
1.71
0.36

—0.96
—2.06
—2.89
—3.47

—3.86
—4.07
—4.02
—3.63

—2.84
=1.72
—0.48

0.66

1.49
1.96
2.18
2.35

0.56
0.62
0.51
0.26
—0.05

—0.29
ete

0.24
—0.98

Neils
—1.86
lo
—1.08

—1.74
0.16

—0.17

0.58
0.83
0.85
0.64
0.26

—0.33
—0.37

0.04
\-1.06

—=1/:09

—1.40
—0.93

—1.57
0.04

—0.62)

0.41
0.60
0.63
0.50
0.23

OSES
—0.16
0.00

=(025/7)|

—0.74
—0.98
—0.90

—0.66)

—0.84
0.14

—0.41

0.62
0.76
0.70
0.44
0.07

—0.22
—0.22
—0.06
—0.55

—0.69
—0.96)
0.95)
—0.68

—1.03
0.01

—0.51

0.40

0.51 ||

0.48
0.32
0.08

—0.27

—0.25 |

0.14
—0.87

—0.89
—L.37
—1.24
—0.76

—1.36
0.04

—0.24

The nurnbers without sign must be added; those with the sign — must be subtracted.

17

9

=

58

V

N. America. — Frankrort ArsenAL. Lat. 39° 57’ N. Long. 75° 8’ W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Fahrenheit.

Hours.

Morn. 1

me wD

aoratn a

10
11
Noon. .

mw De

maton on

11
Midn. .

oo WN OD
COND

.

_
_
o

_
om fo

PHAM
Nunwn bv

aD

eae

.

ao

noe bw bw

~v
e

9.12.3.9
7. 2.2(9)

} Dail. ext.

F

\—6.41
|—6.80

(5.69

De Dd)
\—0.83

3.02
3.40
4.10
4.79

5.20
5.06
4.23
2.75

0.77
—1.40
—3.47
9.18

—6.57

—4.28

0.65

1.71
2.30
2.54
2.68

1.26
1.71
1.71
1.24
0.45

—0.29
—0.36

0.18
—1.44

-1.28
—2.03
~1.85
1.10

—2.32
0.23

Feb.

3.29
3.89
4.46
5.02

5.54
5.29
4.52

2.99

0.68
—1.62
—3.98
—5.85

—6.77
—7.16
—6.59
—5.49

—4.21
—2.50
—1.04

0.27

1.48
2.09
2.66
3.06

1.40
1.76
1.62
1.08
0.25

—0.38}
—0.54

0.07
—1.46

—1.33
—2.09

-1.89|

—1.13

—2.57
0.09

March.

—6.17

—6.77)

—6.98
—6.64

—5.63
—4.01
=2.07
—0.14

1.37
2.36
2.95
3.33

—2.75
0.07

—0.81

(Sil —Ol18

April.

4.2]
5.24
6.48
7.40

7.45
6.37
4.37
1.91

—0.45
—2.36
—3.80

2|—5.00

—6.12
—7.18
=—7.94
—7.99

—7.00
—5.02
—2.45

0.05

1.91
197,
3.38
3.65

0.68
0.95
0.97
0.74

0.29)

—0.29
—0.25

0.72
94

—1.42
—2.63
—2.12
—0.88

—2.88
0

~

7.74
5.96
3.74
1.28

GO
—2.90
—4.43
—5.29

—6.91
192
—8.51
—8.33

—7.20
—5.20
—2.68
—0.23

1.80
3.22
4.16
4.52

0.38
0.54
0.54
0.41
0.16

—0.79
—0272

0.43
—2.39

—2.09
—3.33
—2.81
\—1.60

—3.26

25 —0.16

°L0

—0.27

‘0.25

June.

7.67
8.39
8.82
8.64

7.56
5.54
2.84
—0.07

—2.70
—4.75

|—6.17

—7.13

—7-90
—8.48
—8.75
—8.44

2.63
4.55
5.87
6.84

0.16
0.11
0.05
—0.05
=0-11

—1.01
—0.92

0.54
—2.72

—2.84
—1.28
—3.98
—2.54

—3.98
—0.09

July.

6.91
7.90
8.62
8.64

7.65
5.67
3.02
0.18

—2.39
—4.41
—5.94
— Feld

—8.06
—8:71
—8.87
—8.26

—6.75
—4.50
=1:87

0.63

2.63
4.03
5.04
5.92

0.59
0.59
0.41
0.14
—0.18

—1.01
—0.81
0.34

—2.02
—2.86

—4.28
—3.94

|—-0.11

0.04

0.11

18

= 91 52|—9:97

—3.94|

6.05
6.84
TAT
7.56

6.73
4.97
2.59
0.02

ou

ip te Ot
—

|
Dn vw

= fa
—7.83
—8.12
—7.70

—6.32
—4.12
—1.51

0.97

2.90
4.14
4.84
5.40

0.43
0.54
0.50
0.52
0.07

—0.79

—0.63)
0.43

—232

—2.63
—3.92!
—3.56

—3.44)

0.14

—0.29

5.92
6.86
7.85
8.39

197
6.39
3.85
0.81

—2.16

—4.64)
—6.50}

—(-Sl

—8.69
9:16
9.05
—8.17

—6.39
—3.87
—108

1.49

3.35
4.41
4.91
5.29

1.26
1.40
1.15
0.59
—0.11

—0.65
—0.43

0.54
2-21

—2.66|

—4.19

—3.94)
—2.43|

—3.92
0.36

-0.38.

Oct.

5.40
6.01
6.62
7.04

2.66
2.86
3.17
3.40

7.02
6.35
4.93

3.89
3.11
2.39
1.51

bo
ao
—

—0.05
—1.58
—2.52
—4.41

~

to oO pn
re

Now oOo
-_

.
ou
—

OL
Oro
—9.50
—8.24

—5.36
=9.72
—5.40
—4.41

—6.19
ood
—1.22

0.97

—3.42
—1.26
0.32
155

2.30
2.59
2.05
2.59

2.63
3.74
4.41
4.91

4.21
4.05
3.42
2.18

0.41
—1.71
—3.83
—5.51

—6.46
—6.58
—5.72
—4.37

—2.07
—1.24
0.02
0.95

1.60
2.03
2.39
2.10

1.31
1.87
1.91
1.44
0.59

0.92
1.35
1.42
1.13
0.52

—0.74
—0.83

0.09
ciel

—0.34
—0.36

0.00
—1.28

—2.45
—3.19
—3.75

—2.09

16d,
—2.21
—2.03
—1.49

\—3.53
0.09

|—-1.89
0.32

The numbers without sign must be added ; those with the sign — must be subtracted.

1.40
1.71
1.58
0.99
0.16

—0.50
—0.50
—(Or4
—1.24
2O5
-16
14
53

—2.32
0.02

6.44
5.38
3.69
1.55

Oda
—2.86
—4.59
—6.03

—7.09
—7.67
—7.67

—5.63
—3.60
—1.42

0.61

2.21
3.20
3.76
4.23

0.90
1.15
1.08
0.72
0.18

—0.61
—0.56

—2.00
|-3.08
|-2.79
|—1.71

—3.06
0.09

!
—1.39 —0.92 —1.15 -0-54
woo

—6.98 ||

0.32 |
—1.96

iy
|
|
|
|
\
]
|
i

N. America. — Toronto.

VI.

583

Lat. 48° 39/ 35” N. Long. '79° 21’ 30” W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Fahrenheit.

| Morn.

Noon...

mew =

aot n o

10
11
Midn...

Ser matne:
CHAD

—_
o

Se
wo ©

www we
—_
oO

=>)

6.
7.

— = bo bo

2.16
2.39
2.68

3.02
3.29
3.26
2.72

1.58
0.00
—1.71
—3.11

—3.89
—3.98
—3.53
—2.84

—2.14
—1.62
—1.24
—0.88

—0.43
0.16
0.83
1.42

0.83
1.01
0.92
0.59
0.07

—0.38
—0.52
—0.18
—0.77

—0.36
—0.63
—0.59
—0.32

—1.37
-0.41

EN lentl

Feb. |March.| April.

1.35
1.91
2.66

3.46
3.92
3.98
3.40

2.33
0.61
—1515
—2.66

—3.67
—4.07
—3.92
—3.38

—2.63
—1.89
—1.24
—0.68

—0.25
0.11
0.38
0.63

1.01
1.27
1.37
0.99
0.36

—0.11
—0.27
—0.02
—0.68

—0.05
—0.34
—0.14

0.16

—1.15
—0.16

0.95
1.17
1.08
0.72
0.14

—0.32
—0.36

0.27
—]).28

—1.04
—1.80
—1.62
—0.86

—2.18
0.07

May.

5.90
6.64
7.36
7.65

5.11
5.76
6.17

5.94
4.97
3.35
1.42

7.07
5.49
3.17
0.68

—0.50
—2.07
—3.26
—4.19

—1.51
—3.08
—4.14
—5.00

—5.00
—5.76
—6.35
—6.48

—=5.99
—7.16
—8.15
—8.51

—5.94
—4.66
—2.81
—0.77

—7.76
—5.83
—3.08
—0.16

1.06
2.41
3.26
3.85

2.30
3.94
4.82
5.33

0.16
0.29
0.34
0.29
0.16

—0.18
—0.05
0.27
0.41
0.43

—0.45
—0.52

0.54
—1.82

—0.56
—0.61

0.77
—2.50

—1.19
—2.18
—1.80
—0.81

—2.00
—3.24
—2.66
—1.42

—2.50|—3.08
0.07 0.16

June.

5.94
6.62
7-29
7.56

7.13
8.01
8.44

6.98
5.38
3.04
0.48

7.88
6.14
3.49
0.52

—1.85
—3.47
—4.46
—5.18

—2.12
—4.01
=5015
—5.90

—5.94
—6.89
—7.74
—8.08

—6.59
—7.47
—8.28

—8.55

—7.43
—5.65
—3.04
—0.18

—7.83
—5.94
—3.17
—0.18

2.30
3.98
4.93
5.45

2.39
4.14
5.11
5.64

0.14
0.00
0.14
0.23
0.27

0.11
0.16
0.16
0.14
0.07

—0.52
—0.56

0.83
—2.39

—0.54
—0.50

0.95
—2.43

—2.00
—3.49
—3.04
—1.55

—1.94
—3.24
—2.77
—1.46

—3.49
0.20

—3.13
0.18

5.68
6.82
7.61

7.49
6.14
3.67
0.68

—2.09
—4.14
—5.33
—5.96

—6.50
=F. 11
—7.70
—7.81

—6.95
—5.00
—2.25

0.65

2.97
4.32
4.77
4.84

0.56
0.72
0.68
0.45
0.09

—0.16
—0.11

1.13
—1.98

—1.73
—3.22
—2.93
—1.42

—3.20
0.63

6.68
7.63
8.19

7.94
6.71
4.52
1.78

—1.06
—3.62
—5.72
—7.25

—8.33
—8.89
—8.87
—8.12

—6.59
—4.43
—1.94

0.43

2.30
3.58
4.37
5.00

1.13
1.28
1.10
0.63
—0.02

—0.70
—0.59|

0.47
—2.21

—2.18
—3.56
—3.29
—-1.91

—3.71
0.07

4.68
5.04
5.20

5.02
4.48
3.44
1-91

—0.05
—2.25
—4.39
—6.12

—7.11
=—7.25
—6.53
—5.18

—3.53
—1.91
—0.50

0.65

1.53
2.25
2.90
3.56

1.28
1.49
1.28
0.74
0.00

aiid
—0.70
—0.18
—1.55

eae
—2.68
—2.61
—1.85

—2.79
—0.18

2.14
2.39
2.61

2.68
2.52
2.05
1.15

—0.07
—1.46
—2.79
—3.78

—4.28
—4.14
—3.51
—2.52

—1.44
—0.45
0.32
0.86

1.17
1.37
1.53
1.71

1.04
1.19
1.01
0.56
—0.05

—0.32
—0.25
—0.09
—0.70

—1.06
—1.51
—1.58
—1.13

—1.55
0.07

The numbers without sign must be added; those with the sign — must be subtracted.

19

0.63
0.86
0.86
0.63
0.23

—0.05

—0.16|
0.11

—0.54

—0.29
—0.59
—0.54
—0.25

—0.92

0.09

4.41
5.02
5.45

5.38
4.68
3.33
1.55

—0.36
—2.12
—3.58
—4.66

—5 45
—5 94
—6.08
—§.72

—4.84
—3.44
de
—0.02

1.42
2.41
3-02
3.42

0.61
0.81

0.77 ||

0.54
0.14

—0.41
—0.43

0.38 ||

—1.58

—1.31
—2.21
—1.96
—1.06

—2.43

0.05 ,

584

N. America. — Toronto.

Lat. 43° 39’ 35” N. Long. 79° 21/30” W. Greenw.

VIL.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

©

PR wn =

NDIA

6
iG
8
9

Noon...

0.70
—0.00
—0.76
—1.38

ede
Sol edia,
—1.57
—1.26

0290
=—0:72
—0.55
—0.39

—0.19
0.07
0.37
0.63

0.37
0.45
0.41
0.26
0.03

—0.17
—0.23
—0.08
—0.34

—0.16
—0.28
—0.26
—0.14

—0.61
—0.18

—0.16

0.99
6.27
—0.51
—1.18

—1.63
= Ou.
-1.74
—1.50

—1.17
—0.84
—0.55

—0.30

—0.11
0.05
0.17
0.28

0.45
0.61
0.61
0.44
0.16

—0.05
—0.12
—0.01
—0.30

—0.02
—0.15
—0.06

0.07

—0.51
—0.07

—0.02

March.

0.13
—0.71
—1.45
—2.02

—2.38
—2.54
—2.49
—2.23

ae)
—1.22
—0.58

0.02

0.51
0.84
1.04
1.18

0.42
0.52
0.48
0.32
0.06

—0.14

0.12
—0.57

—0.46
—0.80
—0.72
—0.38

—0.97
0.03

|—0.17

—0.16)

April.

—0.22
—0.92
—1.45
—1.86

—2.22
—2.56
—2.82
—2.88

—2.64
—2.07
—1.25
—0.34

0.47
1.07
1.45
1.71

0.07
0.13
0.15
0.13
0.07

—0.20
=0:23

0.24
-0.81

—0.53
—0.97

—0.80|

—0.36

ipl
—0.03

—0/07

Degrees of Reaumur.

May.

—0.08
0.02
0.12
0.18
0.19

=0.25
—0.27

0.34
=—111

—0.89
—1.44
—-1.18
—0.63

—1-37
0.07

—(O19

June.

2.64
2.94
3.24
3.36

3.10
2.39
1.35
0.19

—0.82
—1.54
—1.98
—2.30

—2.64
—3.06
—3.44
3.09

—3.30
—2.51

7|—1.35

—0.08

1.02
1.77
2.19
2.42

—0.06
0.00
0.06
0.10
0.12

—0.23
—0.25

0.37
—1.06

—0.86
—1.44
—1.23
—0.65

—1.39
0.08

—0.12!

July.

2.80
3.17
3.56
3.75

3.50
2.73
1.55
0.23

—0.94
—1.78
—2.29
—2.62

—2.93
—3.32
—3.68
—3.80

—3.48
—2.64
— eal
—0.08

1.06
1.84
2.27
2.53

0.05
0.07
0.07
0.06
0.03

—0.24
—0.22

0.42
—1.08

-0.89
155
—1.35
—0.69

—1.55
0.09

Aug.

2.25
2.57
3.03
3.38

3.33
2.73
1.63
0.30

—0.93
—1.84
—2.37
—2.65

—2.89
—3.16
—3.42
3.47

—3.09
—2.22
—1.00

0.29

1.32
1.92
2.12
2.15

0.25
0.32
0.30
0.20
0.04

—0.07
—0.05

0.50
—0.88

—0.77
—1.43
130
—0.63

—1.42
0.28

Sept.

2.55
2.97
3.39
3.64

3.53
2.98
2.01
0.79

—0.47
1261
—2.54
—3.22

—3.70
—3.95
—3.94
—3.61

—2.93
=O
—0.86

0.19

1.02
1.59
1.94
2.22

0.50
0.57
0.49
0.28
—0.01

—0.31
—0.26

0.21
—0.98

—0.97
—1.58
—1.46

\—0.85

1°65
0.03

—0.03 '—0.05 0.16

Oct.

1.85
2.08
2.24
2.31

2.23
1.99
1.53
0.85

—0.02
—1.00
—1.95
—2.72

—3.16
—3.22
—2.90
—2.30

—1.57
-0.85
—0.22

0.29

0.68
1.00
1.29
1.58

0.57
0.66
0.57
0.33
0.00

—0.34
—0.31
—0.08
—0.69

—0.85
oho
—1.16
—0.82

—].24
—0.08

—0.46

Noy.

0.85
0.95
1.06
1.16

1.19
1.12
0.91
0.51

—0.03
—0.65
—1.24
—1.68

—lO0)
—1.84
—1.56
=1.12

—0.64
—0.20
0.14
0.33

0.52
0.61

0.68
0.76

0.46
0.53
0.45
0.25
—0.02

—0.14
Ost
—0.04
—0.31

—0.47
—0.67
—0.70
—0.50

—0.69
0.03

—0.36

Dec.

0.46
0.50
0.62
0.79

0.96
1.06
1.01
0.76

0.35
—0.15
—0.64
—1.02

—1.23
—1.27
—1.18
—0.99

—0.76
—0.50
—0.24

0.01

0.21
0.36
0.43
0.45

0.28
0.38
0.38
0.28
0.10

—0.02
—0.07

0.05
—0.24

—0.13
—0.26
—0.24
—O. 11

—0.41
0.04

—() ei:

Mean.

1.72
1.96
2.23
2.42

2.39
2.08
1.48
0.69

—0.16
—0.94
—1-59
—2.07

—2.42
—2.64
— Zen)
—2.54

—2.15
—1.53
Odi

The numbers without sign must be added ; those with the sign — must be subtractea.

VIII. 585
Nortu America.— Toronto. Lat. 43° 40'N. Long. 79° 21’ W. Greenw.

- Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Lerroy.

Degrees of Fahrenheit.

Hour. Jan. | Feb. /March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec Year.
Midnight. || 1.47| 1.73] 2.63] 3.22) 5.02) 5.15) 6.37] 5.33| 5.96/ 3.22) 1.80) 0.90 | 3.57
1 1.95| 2.09} 3.11] 3.79| 5.93} 6.00} 7.13) 6.06} 4.57] 3.80} 2.10) 1.50)| 4.00
2 2.05| 2.46] 3.47| 4.48| 6.77} 6.70| 7.68) 6.69| 5.17| 4.13} 2.36) 1.85 | 4.48
3 2.20| 2.82) 3.76] 5.08) 7.45) 7.50) 8.41] 7.29| 5.59} 4.31] 2.66) 1.96| 4.92
4 2.28} 3.20] 4.07] 5.38] 7.93) 8.06| 9.03] 7.63] 6.18] 4.64) 2.85] 2.04] 5.27)
5 2.46} 3.62] 4.85) 5.75| 7.83! 7.88| 9.02| 7.89| 6.77| 4.77] 2.76] 2.07]| 5.43]]
6 1.83] 4.23| 4.75] 5.48} 5.40) 5.21) 5.92) 6.57) 6.17] 4.71] 2.52] 2.39 4.60
7 1.94| 4.34] 3.93/ 3.22] 2.43] 2.41] 2.38] 3.28] 3.68) 3.94] 2.52] 2.55 | 3.05)!
|
8 1.66| 3.29| 1.89| 1.09] 0.06| 0.10 |—0.31} 0.21| 1.02] 1.66| 1.53) 2.12] 1.25
9 0.63) 1.02 —0.25 —1.01 |—2.11 |—1.82 |—2.39 |—2.26 |—1.52 |-1.01| 0.01| 0.92) —0.82
10 —0.59 |—0.95 —1.91 —2.45 |—3.81 —3.49 |—3.98 |—4.18 |—3.47 |—2.93 |—1.41 |—0.53 | —2.47
11 —1.70 |-2.44 —3.14|—3.85 |—4.92 |—4.77 |-5.49 |—5.57 |—4.85 |—4.33 |-2.44 |-1.72 | -3.77
| |
Noon. —2.48 —3.56 —4.15 —4.86 |—5.87 |—5.88 |—6.72 |—6.39 |—5.95 |—5.36 |-3.34 |—-2.52| —4.76|
1 —2.92 —1.49 —4.79 —5.72 —6.83 —6.59 |—7.58 |—7.11 |—6.58 |—5.76 |—3.74 |—3.06| —5.43
2 —3.20|—4.88 |—5.31 |-6.14 —7.13 —7.03 |-8.26 |—7.62 |—-6.96 |—-6.04 |—3.82 |-3.31 —5.81|
3 —3.16 |—4.90 |—5.15 —6.16 |—7.20 —7.37 |-8.34 |—7.98 |—7.01 —5.85 |—3.64 |-3.13| —5.82
4 —2.63 |—4.47 |—4.65 —5.81 |—7.17 —7.60 |—8.25 |—7.79 |—6.75 |—5.17 |—2.83 |—2.47 (547
5 —1.68 |—3.30 |—3.92 |—5.12 |—6.80 7.18 —7.93 |—7.20 |—5.78 |—3.40 |—1.58 |—1.49 | —4.61
6 —0.90 |—1.87 |—2.35 |—3.42 '-5.05.—5.73 |-6.57 —5.39 |—3.16 |—1.37 |—0.76 |—0.82 | —3.12
7 || —0.40 |—-0.98 —0.91 |-0.94 —2.19 —2.99 —3.28 |—1.64 |—0.43 —0.25 —0.15 |—0.47 '—1.22|
8 —0.12|-0.13| 0.03) 0.66 0.43 0.33| 0.68; 1.23) 0.81; 0.48) 0.19 —0.121) 0.38
9 | 0.07} 0.52} 1.00) 1.78] 2.31) 2.44) 2.99] 2.70] 1.90] 1.25) 0.44) 0.18]] 1.46
10 0.44] 1.06) 1.63! 2.59) 3.29 3.80} 4.24) 3.73) 2.94] 1.97] 0.78) 0.47]| 2.24
11 0.77| 1.60) 2.01] 3.07) 4.20| 4.76) 5.21) 4.54] 3.61) 2.68) 1.13 0.59 | 2.85
6, 6 0.46) 1.18} 1.20} 1.03| 0.17/—0.26 0.32 0.59) 1.50) 1.67) -1.38] 0.78)| 0.74
7; i 0.77| 1.67) 1.51] 1.14} 0.12|—0.29 0.45 0.82| 1.62) 1.84] 1.18] 1.04|| 0.91
8, 8 0.77| 1.58| 0.96| 0.87) 0.24| 0.21) 0.18) 0.72) 0.91; 1.45|/ 0.98| 1.15|| 0.82
9, 9 0.35| 0.77] 0.37| 0.38| 0.10] 0.31] 0.30] 0.22] 0.19] 0.10| 0.22] 0.55|/ 0.32
10, 10 —0.07 0.05 |—0.14 |—0.07 |—0.26| 0.25) 0.13 |-0.22 \—0.26 \—0.48 |—0.31 |—0.03 || —0.11
6, 2, 10 ||\—0.31| 0.14} 0.36) 0.64) 0.52) 0.66) 0.63] 0.89) 0.72) 0.21 0.17 -0.15 | 0.34
7, 2,9 |/—0.40 —0.01 —0.09 —0.38 —0.80 —0.73 —0.96 —0.55 0.46 —0.28 —0.29 —0.19 | —0.43
9,12, 3,9) —1.23 |-1.73 |-2.01 |—2.56 |-3.22 |-3.16 |—3.61 —3.48 —3.14 —2.74 1.63 —1.1-4 age
|
| | |
Mean. || 25.82 | 23.70) 29.79) 41.99) 52.92 60.67, 66.39) 65.86) 57.55, 44.14 36.18) aan 414.37
|

| | |

The numbers without sign must be added ; those with the sign — must be subtracted.

F 21

586

Nortu America. — TORONTO.

}

TX.

Eat 432% 40'aNs 5 2Gones 19 2a Gas

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

|

| Ifour. || Aug. | Sept. |

| Midn. 4.00] 3.89]
2 5.39| 4.34
4 6:34) 5.60

6 5.99! 4.59)

| 8 |i 2.79 | 2.19)
| 10 -1.74/—1.48

|
|| Noon. ae

| 2 |i-7.93!-6.60!
4 ||-7.72'-6.70|

| 6 -5.63 —2.80|
| 8 ||-0.70; 0.10
10

|| 1.99] 2.89

|
—
vw @W
st

2s
=o
—1.04

7

2

yu

~~

0.03
1.18)

Mean. | 66.40 57.70 48.31 30.39

Dec. | Jan. | Feb. | March.
1.68| 1.10] 1.28] 1.31
1.00; 2.36) 2.69] 2.88
1.38] 2.88] 3.36] 5.56
1.32] 8.54] 3.90| 5.22
0.92, 3.10, 3.22 3.30
0.21 |—0.21|/—0.81 —0.03
1.22] -2.82/—3.50/—4.23)
|—2.54 |—4.07!—5.43 |—-6 49
'-3.22 -3.88 -3.60 —5.96,
|-1.30 | -1.77/-1.50 —3.43)
0.02 -0.90 —0.59 1.23.
0.89 0.17 0.22 -0.30
|23.42) 8.10 | 20.84 27.31 |

April. | May. | June. | July. |/ Year.
2.52| 4.55| 5.25! 4.39/| 2.85

4.37| 6.95| '7.42| 7.17]| 4.20]

7.09| 6.95| 7.18| 7.57|| -4.96

5.56 6:61 "5-551 15-46" 250

3.44) 3.06] 0.88) 0.60) 2.24)

—0.79 | —0.97 eae |-2.85 || 0.93
-5.01 -7.10 -5.17 |—5.46 | —4.30
_—5.99 —8.76 |—7.72 | —7.36 || —6.02
—5.79 8.35 —7.00 |—7.51 || 5.65,
-3.88 —3.87 —5.02 | —5.410|/ —3.20
—0.81 —1.61 —1.10 —0.67 | —0.65,
0.64 -1.87) 2.47) 2.64] 1.30,

| | Sees aA

42.27 56.61 6438 | 70.39 || 43.01

The numbers without sign must be added; those with the sigu — must be sabtracted.

22

7 1
Hour. | Jan Feb. | April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. Dec. | Year. |}

| | |
Midn. || 0.68} 0.81 1.45] 2.24) 2.36) 2.91] 2.43) 1.76) 1.44] 0.81]. 0.40) 1.53]
Hea 0.88| 0.98 0.78| 2.62} 2.67) 3.29] 2.72| 2.03] 1.71] 0.94] 0.66|| 1.80
2 0.92) 1.13 2.08} 2.99} 2.98] 3.54] 3.02] 2.29) 1.85] 1.06 0.83) 2.01
3 || 0.99) 1.32 2.17] 3.31] 3.32] 3.86] 3.82] 2.49] 1.92] 1.20] 0.88]| 2.20
4 VWieetz03) Mas 2.36) 3.52) 3.58] 4.14] 3.48| 2.76] 2.06) 1.28] 0.90)| 2.36
5 1.11] 1.61 2.52| 3.49) 3.49] 4.16] 3.57] 3.04) 2.13] 1.23] 0.91)) 2.44
6 || 0.79) 1.86 2.47| 2.40; 2.82] 2.74] 2.92) 2.74) 2.04) 1.11 1.09, 2.05
7 ||| 90283) 1.92 1.45| 1.08; 1.07] 1.11] 1.60] 1.60). 1.70) 1.11] 1.16) 1.36
Sa e087). .1.47| 0.45] 0.09} 0.03 |—-0.05| 0.15) 0.38] 0.70} 0.64; 0.97)|. 0.56
9 || 0.30) 0.44 —0.43 | —0.94 —0.81 |—1.03 |—0.96 —0.69|—0.49 —0.04) 0.45 |—0.36
10 —0.25/—0.45 —1.11)—1.69 | —1.55 |-1.78 | -1.84 —1.57) —1.35 | —0.68 |—0.20 | —1.11
11 W077 |—-1.16| —1.72|—2.20 | —2.12 |—2.47 | —2.48 | -2.20|—1.96 | —1.13 —0.75 |—1.70
Noon, || —1.12 -1.69 '-2.18 —2.62 -2.61 |-3.05 3.04 —2.64 —2.36 | —1.48 —].11'-2.15
1 _{'=1.34|—2.07 |—2.60 |—3.03 |—2.93 |—3.46 }—8.25 | —2.90 | —2.55 | —1.66 | —1.42 | —2.45
2 i!—1.46| —2.25 |—2.76 |—3.18|—3.12 |—3.84 |—3.51 | —3.08 | —2.70 | —1.69 | —1.49 || —2.62
3 —1.44/-2.24 —2.80 |—3.21 —3.29 |-3.92 |-3.66 | —3.09 |—2.60 | -1.62|—1.88 —2.63)

| |

4 |-1.21|—2.00, '-2.62 -3.19 —3.40 |—3.93 |—3.60 | -3.00 —2.28 —1.22 |—1.09 '—2.47
5 |-0.77|-1.47 | 2.30 |—3.02 |—-3.13 |—3.72 | —3.35 | -2.57|—1.50 | —0.68 | —0.67 , —2.08
6 |—0.40|—0.82 (—1.50 |-2.24 —2.55 |-3.08 | -2.51 | -1.38 |—0.59 | —0.32 —0.36 —1.40
7 ||-0.17|-0.38 | |—0.37 |—0.96 |—1.33 |—1.54|—0.74 |-0.18 —0.10|—0.06 |—0.21 |—0.53
8 —0.03) 0.00 0.33) 0.24 0.13) 0.33) 0.56 | 0.39) 0.23) 0.08 —0.0+4 | 0.19 |
9 || 0.06) 0.28 0.81} 1.02) 1.09| 1.38) 1.26| 0.85} 0.57| 0.20) 0.07; 0.67
10 || 0.23) 0.53 1.16) 1.45] 1.69] 1.93)- 1.72 | 1.32) . 0.90 0.36) 0.20 | 1.02
11 ||. 0.37] 0.76 1.38| 1.86| 2.12] 2.45| 2.07] 1.60] 1.20] 0.52] 0.25/| 1.31

| Mean. '—2.97|-3.88/—0.98| 4.72 | 9.29 | 12.75 15.11! 15.00 | 11.37/ 5.42 | 1.88 —2.03 |

Norru America.—Monrtreau. Lat. 45° 30’N. Long. '73° 22’ E. Gr.

Degrees of Fahrenheit.

X.

Nortu America. — Montreat, Continued.

587

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year.

Degrees of Fahrenheit.

Hour. | Aug. Sept. Oct. | Nov. | Dec. | Jan. | Feb. | March.) April. | May. | June. | | July. Year.
A.M.1/| 5.03| 4.92] 2.58/ 1.16] 0.88) 1.43] 1.61] 4.88] 3.12] 4.85 1.55| 5.07, 3.30
3|| 5-99| 5.20] 3.61] 1.58) 1.79] 1.30| 2.72] 5.18] 5.14] 6.51] 5. a8) 6.80|| 4.25 ||
5) G44) 5.43) 4.45 2.08, 2.21, 1.87) 3.95) 6.84) 6.54) 6.56) 6.20) 7.76) 5.05
7|| 2.10) 3.47) 3.61, 2.01) 2.08) 1.98) 5.22) 7.07) 3.84) 3.56) 4.72) 3.04) 3.56
9||—-0.58| 0.73} 0.77) 0.63) 1.14) 1.16 3.99| 2.96) 0.71] 0.50/—0.02| 0.22), 1.02
11 ||—3.61 | —2.20 —2.73 1.35 |—0.49 |-1.08 —0. Le .51 |—2.48 | —2.79 | —3.42 | — “3.21 2.17
| | ' | | |
P.M.1 || —6.61 |—5.12|—5.41'—8.47|—-2.88 1.49 |—4. 80|—7. 414.93 | -5.78/—5 97 /-6.08) la 95
3 |-7.34 —6.65 |—5.80 —3.22 —2.78 —2.36 —6.08 | —9.03 |—6.33 |—6.46 —6. pag 01) \-5.91
55.47 —5.83 —3.15 —1.19 —1.44 —0.63 |—4. 12) -6.48, -5.63 —6.62 —6.18 —6.53, | a, 43
7 || —1.45 ,—0.62 |—1.00 —0.44 —0.70 —0.60—1. 23 240 —2.93 —3.50 —3.17 —2.88 | —-1.74
9|| 1.58} 1.32] 0.32) 0.13)—0.71| eae 75) 0.44) 0.61| 1.58 1.17) 0.34
| |
11|| 3:10} 3.02] 2.47) 1.48) 0.22) 0.61) 0.24) 1.78 2.06) 2.52) 3.55 3.39) 2.02
|
Sep eer spe eee ee ele aa a see eb i
‘Mean. (69.69 57.53 (44.70 32.76 15.91 | 18. soe: 52 | 22.50 34.47 | 51.33 | 65.08 | 67.42 | 41.24
XI.
| Nortn America.—Sirxa. Lat. 57° 3'N. Long. 135° 18’ W. Gr.— Dove.
Degrees of Reaumur.

| Tour. | Jan. | -Feb. March. April. | May. | June. July. | Aug. | Sept. | Oct. | Nov. | Dec |! Year
| Midn. | 0.33! 0.58; 0.97| 1.51) 1.80| 1.81! 1.68] 1.34] 1.07) 1.19] 0.41| 0.28), 1.08
1 || 0.84] 0.66; 1.09] 1.68; 2.04] 2.06] 1.88] 1.53] 1.18; 1.11! 0.46, 0.33! 1.20
2 | 0.35 0.72 1.17| 1.81| 2.20] 2.25, 2.04] 1.66! 1.33} 1.18| 0.49 0.33. 1.29
3 | 0.51) 0.78; 1.36) 1.89| 2.43) 2.49; 2.16 La7 1.24] 0.64] 0.48; 0.18! 1.33
4 [i 0.45] 0.86! 1.47] 2.02) 2.55 2.57! 2.20} 1.82] 1.29) 0.68| 0.49 0.18) 1.38
5 |' 0.45] 0.83) 1.57| 2.07] 2.39] 2H 2.95| 1.89| 1.33] 0.70] 0.49: 0.14 | 1.52
! {
6 || 0.45) 0.84) 1.56] 1.89) 1.76] 1.77! 1.67| 1.62] 1.83] 0.78] 0.46! 0.18, 1.26
7 | 0.52] 0.82| 1.37| 1.13] 0.96: 1.08! 0 0.96; 1.09] 1.05) 0.58! 0.40! 0.17) 0.85
8 |, 0.48) 0.76 0.75' 0.31) 0.00} 0.26] 0.26) 0.40! 0.47, 0.53] 0.33) 0.12: 0.39
9 | 0.39! 0.49 \-0.08) —0.63 |—0.82|—0.52 0. 58 —0.26|-0.17, 0.12] 0.23) 0.10 —0.15
10 > | 0.16 —0.03 0.69 -1.12 —1. 35 | —1.28 —1.27 | 0.95 |—0.73 | —0.28 0.00 | —0.11 —0.64
| 11 pe ete ice 175 Bit ee Salar Oe Pa Oe —0.35 | —-0.11 —1.11
“Noon. | 0.57) —1.05 |—1.71 ; -2.13 | —2.17) —2.11|-2.11 | —2.04 |) -1.65 | —1.14 | -0.72 | -0.32 —1.48
|. 1 | -0.83/-1.36'-1.74) -2.33|-2.35 -2.35'-2.25 |-2.33 —1.56|—1.38|—0.84 —0.46 —1.65
| 2 | -0.95/-1.44'-1.99 2.28 -2.40 -2.12 -2.31/-2.16 —1.86 —1.42|-1.00'-0.50 -1.73
| 3 |-0.95 1.47 -1.94' -2.10 2.28 —2.31/-2.13 —2.00 —1.72 —1.37/-0.94/-0.44 —1.64
| 4 | -0.78/-1.20 1.67 -1.91 —2.04 —2.09 -1.94 -1.76 -1.56 —1.13 -0.75 —0.32 —1.43
5 Be a ee ee eee) tA Baie ete 7 020 -1.12
6 | —0.25|—0.45|—0.82) —1. 13|-1.87/ -1.48/—1.26 | —1.02'-0.64 —0.50 ;—0.21 | —0.10 —0.77 ||
7 |-0.15/—-0.10/—0.29 | —0. -48/-0.76 —1.00 —0.81 —0.19 —0.28 —0.16 |—0.04 —0.03 —0.38
8 |-0.01) 0.11! 0.13, 0.15 0.23 -0.41, 0.22 0.12, 0.19) 0.06) 0.07! 0.01) 0.00
9 | 0.15) 0.30) O44) 0.70, 0.48, 0.27, 0.33, 0.66 0.52 0.21 0.22| 0.12) 0.37
10 | 0.23/ 0.37| 0.64) 1.07) 1.02) 0.97; 0.99| 0.96 0.76 0.30} 0.29 0.19 0.65
11. | 0.31) 0.48) 0.84] 1.28; 1.57] 1.46! 1.38! 1.19} 0.90; 0.95| 0.43; 0.22) 0.93
Mean.) -], 39 |-1.07| 0.55 | 3.51 | (6.21 | 9.10 | (10.24, 10.28 7.96 5.26 D252 eye !

The aren without sign must be added ;

23

fies with the sign — must be pabtetde

‘
t

588

Arctic America. — Boortutia Fetrix.

Noon...

mem Oh =

aoaatrn a

[ Dail. ext.

Jan.

Feb.

March.

0.08
0.10
0.11
0.11

0.10
0.10
0.09
0.08

0.06
0.02
—0.02
—0.05

—0.11
—0.14
(a0
—0.14

Ona
—0.09
—0.06
—0.05

—0.03
—0.02
0.02
0.05

0.01
0.02
0.02
0.02
—0.00

—0.03
—0.08
—0.02
—0.04

—0.03
—0.03

i—0.02

—0.01

—0.04
—0.03

—0.02

0.42
0.28
0.25
0.21

0.22
0.26
0.29
0.22

0.05
—0.26
—0.58
—0.87

=1.02
—0.98
—0.78
—0.46

—0.14
0.13
0.32
0.43

0.20
0.31
0.33
0.28
0.13

—0.06
—0.10
00:7
—0.20

=0.35
—0.38
—0.40
—0.37

—0.28
0.08

=0.25

1.61
1.85
2.10
2.30

2.38
2.23
1.77
0.98

—0.06
—1.22
—2.28
—3.05

—3.38
—3.26
—2.78
—2.06

—1.29
— (oa)
0.01
0.44

0.76
0.99
1.19
1.38

0.83
0.89
0.71
0.35
—0.12

—0.24
—0.20
—0.01
—0.53

—0.75
—1.14
—1.20
—0.81

—1.28
0.01

—0.50

XII.

Lat. 69° 59’ N. Long. 92° 1’ W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to ebtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

2.17
2.25
2.3

2.26

2.02
1.53
0.81
—0.06

—0.98
eo
—2.45
—2.86

—3.03
—2.96
—2.67
—2.18

—1.50
—0.74
0.06
0.78

1.35
1.74
1.95
2.08

0.40
0.44
0.36
0.19
—0.04

—0.27
—0.22

0.10
—0.72

—1.08
—1.51
—1.55
—1.11

=1.29
0.14

—0.37)

May.

2.64
2.75
2.61
2.23

1.76
1.02
0.35
—0.32

—0.95
—1.54
—2.06
—2.416

—2.66
=2.65
—2.40
—1.98

—1.45
—0.88
—0.34

0.20

0.74
1.28
1.82
2.30

0.07
0.01
—0.06
—0.11
—0.13

—0.52
—0.48
—0.12
—0.84

—1.15
—1.49
—1.49
—1.16

—1.27
—0.21

0.05

June,

July.

2.38
2.55
2.45
2.05

1.78
1.78
1.65
1.35

0.99
0.61
0.26
—0.03

1.39
0.65
—0.04
—0.58

—0.37
—0.70
—1.05
—1.43

—0.99
—1.33
—1.66
—2.02

—1.70
—1.86
—=1.78
—1.56

—2.33
—2.48
—2.38
—1.98

—1.36
—0.66
—0.01

0.51

—1.18
—0.78
—0.34

0.07

0.50
0.90
1.20
1.59

0.92
1.26
1.63
2.04

—0.09
—0.04
0.02
0.07
0.10

—0.01
—0.03
—0.04
—0.04
—0.04

—0.37
—0.39
—0.12
—0.68

—0.53
—0.44
—0.19
—0.83

—0.80
—0.95
—0.87
—0.72

—1.26
—1.53
—1.46
—119

—0.77
—0.15

—1.12
OnLy

0.04|—0.04

Aug.

1.34
1.30
1.17
1.02

0.86
0.70
0.50
0.24

—0.10
—0.49
—0.86
—1.16

—1.34
—1.38
—1.32
—1.18

—1.01
—0.78
—0.50
—0.16

0.24
0.66
1.01
1.25

—0.04
—0.00
0.04
0.07
0.09

—0.21
—0.28
—0.01
—0.49

—0.44
Os 51
0.55
—0.42

—0.59
—0.10

—0.02

0.56
0.62
0.66
0.66

0.56
0.46
0.27
0.05

—0.12
—0.43
—0.65
—0.82

—0.93
—0.94
—0.93
—0.68

—0.44
—0.17
0.08
0.26

0.38
0.44
0.48
0.51

0.15
0.18
0.16
0.13
0.01

—0.10
—0.07
—0.01
—0.22

—0.34
—0.45
—0.44
—0.33

—0.37
0.02

i—0.14

0.30
0.32
0.33
0.34

0.32
0.27
0.17
0.01

—0.20
—0.41
—0.59
=0.69

—0.68
—0.57
—0.38
—0.18

0.01
0.14
0.22
0.25

0.26
0.26
0.26
0.28

0.21
0.20
0.13
0.03
—0.08

—0.05
—0.02
—0.01
—0.05

—0.20
—0.28
—0.34
—0.26

—0.25

0.02
0.18
0.29
0.3)

0.24
0.13
0.02
0.01

—0.04
—0.14
—0.26
—0.32

—0.30
—0.19
—0.04

0.06

0.24
0.31
0.36
0.38

0.38
0.35
0.28
0.15

0.09
0.17
0.20
0.17
0.11

0.06
0.02
0.01
—0.00

Ose
—0.09
—0.15
—0.16

—0.01

0.12
0.13
0.10
0.06

0.02
—0.04
—0.07
—0.10

—0.10
—0.10
—0.11
—0.12

—0.14
—0.13
—0.10
—0.05

0.01
0.07
0.10
0.11

0.10
0.10
0.09
0.12

0.02
0.02
0.01
—0.00
—0.00

—0.03
—0.02
—0.02
—0.03

—0.10
—0.12
—0.12
(Akl

—0.06

0.03} 0.14'-0.00

70.01 see

—0.18} 0.03

The numbers without sign must be added ; those with the sign — must be subtracted.

24

1.15
1.12
1.02

0.87
0.64
0.37
0.04

—0.32
—0.70
—1.05
—1.32

—].47
—1.46
—1.31
—1.038

—0.69
—0.34
—0.01

0.27

0.53
0.7)
0 37
1.02

0.15
0.18
0.16
0.10
0.00

}
~0.20
—0.19
~0.04
—0.39

—0.55
—0.71
—0.72
—0.55

—0.61
—0.02

Xi.
Lat. 59° N. Long. 111° W. Greenw.

589

| N. America. — LAKE ATHABASCA.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Lerroy.

The corrections for April and May are derived from observations made at Fort Simpson, Lat. 620 N.

Degrees of Fahrenheit.

| Hour. April. May. October. November. | December. January. February.
daily ext. | 1.58 1.71 0.33 0.25 —(al7 0.77 1.19
GaGneis|l o/s 0.51 1.07 0.59 0.27 0.84 1.19
toatl | 1.50 0.16 0.76 0.54 0.30 0.58 1.31
8,8 1.72 0.18 0.69 0.55 0.62 0.95 1.27
9,9 0.54 0.30 0.37 0.32 0.84 0.80 0.78
10, 10 | —0.43 —0.08 —0.32 —0.06 0.34 0.12 0.31
1,11 =| —1.68 —1.20 —0.57 —0.37 0.10 —0.62 —0.23
6, 2,10 | 0.47 0.46 —0.31 —0.21 —0.22 —0.17 —0.05
Week Tukey . Ose 0.59 —0.40 —0.16 017 0.06 —0.26
Mean. 32.48 44.56 21.44 9.76 0.40 | -23.00 | 4.79
XIV.
Arctic America.— MELVILLE Istanp. Lat. 74° 47’ N. Long. 110° 48’ W. Gr.—
Dove.
Degrees of Reaumur.
Hour. January. February. March. October. Hour. | November. December.
A.M. 1 0.12 0.10 1.04 0.04 A.M. 2 —0.12 —0.09
3 0.18 0.05 1.22 0.12 4 —0.02 —0.06
5 0.07 0.25 090 0.24 6 0.00 0.11
it 0.11 0.29 0.57 0.20 8 —0.22 0.07
9 —0 13 —0.24 0.29 —0.15 10 —0.38 0.11
11 -—0.35 —0.43 —1.33 —0.46 12 —0.41 0.24
Pee —0.22 —0.65 —1.72 —0.43 Pec —0.27 0.14
3 —0.25 —0.52 —1.00 0.22 4 0.16 0.00
5 0.04 0.04 —0.43 —0.24 6 0.27 —0.12
7 0.04 0.24 0.06 —0.10 8 0.38 —0.26
Oiseul| Om 0.35 0.33 0.11 10 | 0.36 —0.12
11 0.40 0.49 0.66 0.43 12 0.25 0.00
Mean. —29.75 —27.58 —22.73 | —14 32 Mean. —18.65 —25.75
XV.
SpirzBerGeN. — Hecria Cove. Lat. 79° 55’ N. Long. 16° 49' E. Gr.—
Dove.
Beers ots Resume
Tour June. July. August. Hour. ] June July. August. |
anaes Bel 4 96s 0.62 0.42 | P.M. 1 ||. -0.67 —0.67 -0.63
3 0.43 0.84 0.54 3 || —0.58 —0.42 —0.58
Breit je O26 0.51 0.53 5 || '-0.27 | O41 |. 0.82
7 |) 0.12 —0.02 0.25 Wout. OLE —0.17 —0.06
9 | —0.29 —0.09 —0.09 Sra 0.21 0.06 0.14
li | —0.47 —0.49 —0.45 1D ial 0.61 0.26 0.24
i | oe eee oo
|
Mean. 1.71 3.63 2.84

The numbers without sign must be added; those with the sign — must be subtracted.

20

59U

S. America. — Rio JANEIRO.

XVI.

Lat. 22° 54'S. Long. 48° 16’ W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Fahrenheit.

Hours. Jan.

0.74
1.64
2.50
3.08

1.51
2.41
3.11
3.90

Morn. 1

3.22
2.93
2.30
1.49

3.29
2.84
2.21
1.49

0.68
—0.07
Oa)
—1.40

0.72
—0.05
—0.86

Noon..- - —1.64

—2.00
—2.41
—2.59
—2.45

—2.30
—2.75
—2.88
—2.70

me OD =

—2 05
—1.51
—1.04
—0:.72

—2.30
—1.82
—1.40
—1.13

Mata on

©

—0.59
—0.56
—0.41

0.00

—();92
—0.63
—0.14

0.59

o

0.72
0.63
038
0.05

0.52
0.4]
0.18
—0.11

OOS aa ce
CnMDIWID

10.10 ||—0.32
—0.23)
—0.07
—0.02

—0.34
—0.50
—0.34
—0.18

Cs
www
ao ©

oe
i
°

a

—0.34
—0.07
—0.47
—0.27

—0.59
=0.27
—0.63
—0.41

wt

Or Osis?
a)

0.16,
0:94,
—0.32

Teal
9.12.3.9
7. 2.2/9)

—0.05
= 19
—0.61

Dail. ext.|| 0.32 0.27

Feb. | March.

1.80
2.48
3.02
3.24

3.15
2.73
2.14
1.40

0.59
—0.23
=1-01
Heal

—2.30
—2.66
—2.84
—2.77

—2.50
—2.12
—1:67,
—1.22

—Oomia
—0.25
0.36
1.06

0.32
0.25
0.09
—0.09

—0.25
—0.43
—0.38
—0.05

—0.68
—0.27
—0.63
—0.45

-0.09
Lad
0.52

|

0.20) 0.14] 0.34

April. | May. | June.

0.90
1.64
2.32
2.79

0.56
1.53
2.43
3.04

1.13
2.12
2.93
3.38

2.90
2.75
2.30
1.71

3.29
3.20
2.84
2.39

3.40
3.06
2.48
1.85

1.04
0.32
—0.45
—1.22

1.82
1.13
0.32
—0.65

1.15
0.50
—0.23
—0.99

—1.67
—2.48
—2.99
—3.04

—1.94
—2.41
—2.66
—2.57

—1.71
—2.30
—2.66
—2.75

—2.21
IO
—1.28
—0595

—2.54|—2.75
—2.21/—2.23
—1.89|—1.76
—1.67|—1-42

—0.72
—0.52
—0.25

0.23

—1.44|—1-26
—1.13/-1.13
—0.63|—0.86

0.14);—0.29

0.50
0.54
0.50
0.29

0.50
0.52
0.38
—0.16

0.43
0.29
0.09
—0.16

0.00
—0.29
—0.23
—0.14

—O:11)
—0.27
—0.20
—0.07

—0.32
—0.43
—0.29
—0.11

—0:50
0.18
—0.05
0.36

—0.47 —0.47
—0.07, 0.09
—0.36 —0.23
on 0.07

0 59
(Eig
—6.54

0.18 0.38
—0.90,—0.99
—0.38|—0.68

0.14

|

The numbers without sign must be added ;

F

26

July. | Aug.

1.31
2.00
2.66
3.04

1.85
2.75
3-47
3.87

3.08
2.79
2.25
1.60

3.83
3.47
2.70
1.96

0.90

0.32} 0.23
—0.50/—0.50
Isl —119

1.15

—2.16/—-1.91
—2.88|—2.48
—3.40|—2.84
—3.60}—2.93

—3.47|—2.68
—3.04/—2.23
—2.39|—1.67
—1.85/—-1.13

—1.22|/—0.70
—0.59|—0.32
0.09} 0.09
0.92) 0.61

0.30
0.16
0.07
—0.05

0.29
0.29
0.25
0.11

-0.05
—0.32
—0.27

0.00

—0.14
—0.47
—0.43

0.00

—0.81
—0.09
—0.47
—0.11

—0.63
—O >i
—0.45
—0.16

0.18
—0.97
—0.41

=): 27
Seo
—0.65

0.14} 0.09

Sept. | Oct.

0.97
1.64
2.21
2.50

1.04
1.69
2.27
2.59

2.66
2.41
2.00
1.46

2.52
2.27
1.82
1.28

0.68
0.05
—0.59
—1.22

0.86
0.18
-0.54
—1.26

—1.89
—2 34
—2.50
—2.36

—1.78
—2.16
2:27
—2.12

eS
—1.37
—1.04

—2.00
—1.55
—1.13

Noy.

1.76
2.32
2.75
2.93

279
2.32
1.67
0.90

0.14
—0.56
—1.22
—1.80

—2.32
—2.66
—2.79
—2.66

—2.25
—1.67
—1.08

—0.83|—0.77

—0.61
—0.45
—0.16

0.32

—0.61
—0.41
—0.09

0.38

0.45
0.41
0.27
0.05

0.43
0.45
0.32
0.14

—0.20
—0.32
—0.23
—0.11

—0.11
—-0.32
=0525
Osi

—0.43
—0.18
—0.45
=—0:25

—0.50
—0.18
—0.45
—0.23

0.07} 0.02
—0 88|—0.86
—0.38/—0.38

0.09} 0.14

=0:59

—0.i4

Dec.

1.31
2.05
2.66
2.99

1.24
2.03
2.70
3.06

3.08
2.79
2.23
1.58

2.99
2.68
2.12
1.40

0.59
—0.23
—1.04
—1.82

0.86
—0.14
—0.61
—1.35

—2.43
—2.81
—2.86
—2.59

=|

|
—2.03
—2.52
—2.77
—2.70
—2.09
—1.49
—0.99
—0.61

—2.39
—1.91
—1.44
—1.08

—0.38]-0.79

0.23
0.65
1.15

0.34
0.29
0.16
0.00

—O-18
—0.38
—0.32
—0.05

—0.68
—0.50
—0-.88
—0.72

—0.34
—1.15
—0.32

0.07

those with the sign — must be subtracted,

—0 16
0.14
0.65

—0.50
0.09
0.47

0.45
0.41
0.25
0.05

0.61
0.56
0.41
0.11

—0.20
—0.36
—0.25
—0.09

—0.18
—0.36
—0.27
—0.07

—0.56
—0-.16
—0.47
—0.23

—0.54
—0.36
—0.72
—0.52

-0.11
—1.01
—0.47

—0.16
-1.13
-0.36

0.07) 0.16 |
|

ge

S. America. — Rio JANEIRO.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove,

Degrees of Reaumur.

r

Sea ao eae

most

— — Ww

SS

9.12.3.9
7. 2.2(9)

i Dail.ext.
—

F

—0.26
—0.25
—0.18

0.00

0.32
0.28
0.17
0.02
—0.14

—0.10
—0.03
—0.01
—0.15

—0.03
—0.21
—O=12

0.07

—0.43

0.23
0.18
0.08
—0.05
—0.15

—0.22
—=( 215
—0.08
—0.26

—0.12
—0.28
—0.18
—0.02

—0 53

—0.14

0.14

—0.27

0.12

1.22
0.95
0.62

0.26
—0.10
—0.45
—0.76

—1.02
—1.18
—1.26
—1.23

—1.11
—0.94
—0.74
—0.54

—0.34
—0.11
0.16
0.47

0.14
0.11
0.04
—0.04
—0.11

—0.19
—0.17
0502
—0.30

—0.12
—0.28
—0.20
—0.04

—0.53
—0.23

0.09

1.22
1.02
0.76

0.46
0.14
—0.20
—0.54

—0.86
—1.07
—1.18
—1.14

—0.98
—0.78
—0.57
—0.42

—0.32
—0.23
—0.11

0.10

0.22
0.23
0.17
0.07
—0.05

—0.12
—0.09
—0.03
O21

—0.03
—0.16
—0.05

0 08

—0.40
—0.17

XVII

May. | June.

0.50
0.94
1.30
1.50

0.25
0.68
1.08
1.35

1.51
1.36
1.10
0.82

1.46
1.42
1.26
1.06

0.51
0.22
—0.10
—0.44

0.81
0.50
0.14
—0.29

—0.74
—1.02/—1.10
—1.18)—1.33
—1.22|—1.35

—0.76

—1.13|—1.22
—0.98|—0.99
—0.84|—0.78
—0.74|—0.63

—0.64|—0.56
—0.50|—0.50

—0.28|—0.38

0.06|—0.13} 0.41

0.19
0.13
0.04
—0.07
—0.14

0.24
0.22
0.13
—0.00

—0.19
—0.13
—0.05
—0.21

—0.13
—0.10)
—0.06
—0.22

0.04
—0.10
0.03
0.17

0.08
—0.02
0.16
0.26

—0.44
—0.30

—0.34
—0.24

0.06} 0.15! 0.06) 0.06] 0.04

0.22} 0.10

July.

0.82
1.22
1.54
1.72

0.58
0.89
1.18
1.35

1.70
1.54
1.20
0.87

1.37
1.24
1.00
0.71

0.51
0.14
—0.22
—0.58

0.40
0.10
—0.22
—0.53

—0.96
—1.28
—1.51
—1.60

—0.85
—1.10
—1.26
—1.30

—1.54
—1.35
—1.06
—0.82

J sil8)
—0.99
—0.74
—0.50

—0.54
—0.26
0.04

—0.31
—0.14
—0.04

0.27

013
0.13
0.11
0.05
—0.02

0.07
0.03
—0.02
—0.06

—0.21
—0.19
—0.00
—0.36

—0.14
=0.12
—0.00
—0.28

—0.04
—0.21/—0 20
—0.05|—0.07

0.12} 0.08

—0 05

—0 53/—0. 3
—0.29|—0.18

0.46
0.75
101
1.15

1.18
1.07
0.89

0.38
0.08
—0.24
—0.56

—0.84
—1.04
—T11
=1.05

—0.89
—0.69
—0.50
—0.37

(eri
—0.18
—0.04

0.17

0.19
0.20
0.14
0.06
—0.05

—0.14
—0.11
—0.05
—0.22

—0.08
—0.20
—0.10

0.03

—0.39
—0.17

Oct.

0.78
1.03
1.22
1.30

0.43
0.73
0.98
1.11

1.24
1.03
0.74
0.40

1.12
1.01
0.81
0.57

0.06
=0.25
—0.54
—0.80

0.30
0.02
—0.26
—0.54

—1.03
—1.18
—1.24
—1.18

—0.79
—0.96
—1.01
—0.94

—0.79|—1.00
—0.61|-0.74
—0.46|—0.48
—0.34|—0.26

—0.27'—0.06
—0.20| 0.10
—0.07} 0.29

0.14) 0.51

0.15
0.13
0.07
—0.00
—0.08

0.20
0.18
0.12
0.02
—0.99

Oli
—0.14
—0.02
—0.30

—0.14
—0.10
—0.05
—0.19

—0.22
—0.39
—0.32
—0.15

—0.08
—0.20
—0.11

0.01

—0.51
—0.14

—0.38
—0.17

0.03

0.58
0.91
1.18
1.33

1.33
1.19
0.94
0.62

0.26

—0.10
—0.46
—0.81

—1.08
—1.25
—1.27
—1.15

—0.93
—0.66
—0.44
—0.27

—0.17
—0.07

0.06
0.29

0 27
0.25
0.18
0.05

—0.09

—0.16
SUSU
—0.04
—0.24

—0.16
—0.32
—0.23
—0.07

—0.50
—0.16

0.03

591
Lat. 22° 54'S. Long. 43° 16’ W. Greenw.

0.55
0.90
1.20
1.36

1.37
1.24
0.99

0.70 |

0.38
0.06
—0°27
—0.60

—0.90
—1.12
—1.23
—1.20

—1.06
—0.85
—0.64
—0.48

—0.35
—0.22
—0.04

0.21

0.20
0.18
0.11
0.02
—0.08

—0.16
—0.12
—0.03
—0.25

——eCias
—0.21
—0.10

0.05

—0.45 |

—0.21

The numbers without sign must be added; those with the sign — must be subtracted,

27

592 We.
N. AmericA.—AmueErst CoLiece. — Lat. 42° 22’ N. Long. 72° 30’ W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — DEwey.

Degrees of Fahrenheit.

Hour. Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. vial

|

Morn. 1 | 3.90) 2.78) 4.73} 6.23] 5.51] 6.64] 6.39] 5.14) 5.36] 4.87) 2.34] 1.63)| 4.63
2 | 4.24) 3.03) 4.81} 6.69) 6.48] 7.28| 6.83] 5.66) 6.12) 5.65) 2.99) 2.20) 5.16

3 || 4.13] 3.20) 5.36] 7.42] 7.41] 7.92] 7.28! 6.03] 6.92] 6.46] 3.49| 2.55]| 5.68
4 || 4.50) 3.94) 5.69] 7.85) 7.88} 8.04) 7.42) 6.29| 6.56] 7.09} 3.72] 2.70|| 6.06
5 || 4.72) 4.20; 6.04) 8.12] 8.18] 7.80) 7.54) 6.66] 7.88) 7.72] 4.03] 3.32|| 6.35
6 || 4.68) 4.78) 6.12) 7.77| 6.77] 5.96) 6.02) 5.81] 7.44] 7.65] 4.34] 3.78|| 5.93
7 || 4.75) 4.78) 4.62) 5.97] 4.22) 4.20| 3.80] 4.48) 5.382] 6.87) 4.28] 3.97|| 4.77
8 || 3.83] 3.78] 2.08; 3.04) 1.62) 1.40} 1.09} 1.96] 2.52] 4.31] 2.68] 4.13]| 2.70

9 || 1.46) 1.45|-0.46| 0.08 |—0.60 |—0.88 |-0.87 |—0.93 |-0.56| 0.83] 0.34] 2.40) 0.19

10 |—1.26 |—0.85 |—2.57 |— 2.69 |—1.12 |-3.12 |—3.80 |—3.04 |-3.32 |—2.24 |—-1.43 |—0.55 ||-2.34

11 |\-4.10 |—2.72 |—4.77 |— 5.65 |—5.12 |—5.68 |—6.43 |—5.45 |—6.04 |—5.02 |—-3.01 |—2.76 ||—4.73
Noon. ||—6.32 |—4.26 |—6.38 |— 7.92 |—6.75 |—8.08 |—8.50 |—6.86 |—8.16 |—7.06 |—5.01 |—4.30 ||-6.63
1 |—7.46 |—5.35 |—7.65 |— 9.46 |-8.15 |—9.36 |—8.83 |—8.23 |—9.12 |—-8.24 |—6.12 |—6.14 ||—-7.84

2 |-7.80|-6.06 —8.34 |-10.42 |-8.75 |-9.00 |—9.50 |-7.86 |—9.80 |-9.28 |-5.97 |-6.30 |-8.26

3 '|-7.32 —5.80 |—8.11|— 9.81 |—8.27 |—8.60 |—7.50 |—7.67 |—9.20 |—9.24 |—5.28 |—5.60 |—7.70

4 |-5.84 |—4.89 |-7.23 |— 8.61 |-7.86 |-7.84 |—7.17 |—6.23 |-8.40 |-8.24 |-3.85 |-3.76 |-6.66

5 |-3.32|-3.10 —5.65 |— 7.04 |—5.97 |-6.00 |—5.83 |—5.26 |—6.44 |—5.65 |—2.28 |-2.03 |—4.88 |

6 |-2.06 |-1.18 |—3.46 |— 4.50 |—4.08 |-4.20 |—4.17 |—2.82 |-3.52 |—-3.50 |-0.85 |—0.68 ||-2.92

7 || 0.24/-1.05| 0.17|/— 1.69 |—2.38 |-1.92 |—1.54 |—1.44 |—1.47 |—1.24 |—0.64 |—0.31 |/—1.11
8 || 0.64|-0.43; 0.93} 0.27|-0.19] 0.04] 0.98) 0.33] 0.11] 0.13] 0.08} 0.201] 0.26

9 | 1.50; 0.28) 1.89] 1.77] 1.66] 1.96) 3.05] 1.59) 1.99] 1.16] 0.80| 0.69) 1.53
10 |} 2.01) 0.57) 3.29; 3.31] 2.73] 3.20] 3.79] 3.02] 3.53] 1.90] 1.16} 1.20]/ 2.48
|

11 |} 2.42) 1.19} 4.29] 4.23] 3.99] 4.20} 4.24] 3.79} 4.61] 3.24] 1.96] 1.58]! 3.31
Midnight. || 2.50) 1.70] 4.85; 4.92] 4.75] 5.48} 5.31] 4.52| 5.34] 4.09} 2.40} 1.98] 3.99

3, 9,3, 9 0.05 |-0.22 —0.08 |— 0.13} 0.05] 0.10] 0.49} 0.26 |—0.21 |—0.20 |—0.16 |-0.01 ||-0.01
9,9 || 1.48] 0.87] 072] 0.93} 0.53] 0.54] 1.09] 0.33] 0.72] 1.00] 0.57] 1.55|| 0.86
10,10 |} 0.38/-0.14| 0.36] 0.31] 0.81] 0.04] 0.00/-0.51| 0.11 |-0.17 |-0.13| 0.33/| 0.12
7, 2,9 |-0.48 |-0.33 |-0.61 |— 0.89 |—0.96 |-0.95 |-0.88 |-0.60 |—0.83 |-0.42 |—0.29 |-0.55 |-0.65

6, 2, 10 |-0.37|-0.24| 0.36 /— 0.24] 0.25] 0.05] 0.10! 0.32) 0.39] 0.09 /—0.16 |—0.44|| 0.01
7,2, 10 -0.35 |—0.04 —0.14 — 0.38 |-0.60 —0.53 |-0.64 —0.12 |-0.32 |-0.17 |-0.18 |-0.38 |—0.32
7, 2, 11 0.21 /-0.03| 0.19|— 0.07 |—0.18 |-0.20|-0.49| 0.14| 0.04] 0.28/ 0.09 |-0.25 |—0.07
$5 12’t||-0.09| 0.02] 0.13| 0.00 |—-0.12 |-0.13 |-0.08| 0.20| 0.11! 0.07) 0.13| 0.17]| 0.03

7,2,2,(9)|-0.01|-0.18| 0.01 |— 0.23 —0.30 —0.22| 0.10 |-0.05 |-0.12 —0.02 |-0.02 |-0.24|/—0.11

Mean. || 22.94) 28.57, 34.81) 48.54) 56.92| 61.60] 71.61] 67.44| 59.80) 50.46) 34.80) 29.28) 47.23

The numbers without sign must be added: those with the sign — must be subtracted.

The above Table has been derived from one year of hourly observations made at Amherst College,
Massachusetts, in 1839, under the direction of Professor Snell, and communicated by Professor Ches-
ter Dewey. It gives the simple differences of the monthly means of each hour from tlie monthly
means of the twenty-four hours which are found in the last line.

F 28

593

HOURLY CORRECTIONS

PERTODICY VARLATLIONS:

AS ae

29

*, jew Cee ete
net oe ere ,

/ ‘ er Gu :
ne ar a a ' bs oe ae
ty q DOS ak oe ete [cite eue ss
me bay ig aT
i 1 ‘ .
i ' _ 7 7 an We oats. -_ = 7
i Neth fi eee ey 1 a
' bes 4 - — 4 7 fi wy : a
/ 7 ; yy, ae
- ae f i Te | os te 4 ‘ >.
. bE) OE, Ocha ef oe Ree hy nit
} i ’
ki 6 5 i '. AP " a 4 note ; mic
WU bat ai: (att * v8 ex ¢ ( (dnd
f Ave , a 7 be
1 7 = fig
" oh (My wy a) ira s i ie 2
A us : é
ges : p He Da rw

cas 96 2 oun ees, Tihs WE a

: a _ y i Y a ie ‘ ms - eal
aa fo* i Ae
er.

fale é a ie : irre wy ; ue Puede SP
ri, ae ve ey ‘- pre e oe Y - ae

=
a
<
~~
a
=
*
i
#
ies

ee : ree ve vy her a aa a
op) aeonpas HAT: SON a ate a

. ate ay ae ee aa

dl si Pe Ate a tke Se Ae a
. iy i 9") ee i a a nae <0 se ta
/ 7 es y os ay peg = a |

By ghee ane NRC ae Te

mh ae eM ‘i ie) Ce. ‘poh ia i. it z
o ‘ wae | ’ oh: iy “iH ae ee a st Th 4

I ws . 13> Dik <r =e . ie 4 on - ia

¥ be 2 i en att “43 Dt eee ae c

ae I ae Oe ae ae
ate L tied a! Jay Gay bee Aa ae van (a

ea a fis / - Hey be - 6 a q 7 oA * ie

oe me! Clee gee aa 7 us
OTR se : VLAD A sree cast Bea aro

; ; 7 a i ov), a cus aie Ai ioe a. a ne Ns | Aa}
cl) es i ae ee th “tia
ae q ‘ brat 4) :

' ih ey 5 ge

m
y
=
7
—o
=~
a

es i) i xD ae ie H a
‘ i 7 a ; a i iit - ie
ae diss Rigi ar: Mei a a ls
heen ee luis si nen
rm oe! iad, hey ee! Big teh ed

7 fees ah Bie

XVIII. 595
Inp1A.— Trevanporum. Lat. 8°31’N. Long. 74° 50’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Fahrenheit.

Jan. | Feb. {March.| April. | May. | June. | July. | Aug. | Sept, | Oct. | Nov. | Dec. | Mean.

—— | | | Lf | | |

2.41| 2.88] 2.99} 3.06] 3.33] 4.25] 3.42
4.64| 4.46] 3.80] 3.02} 2.75} 3.24] 3.44! 3.44] 3.83] 4.861 3.96
5.67| 5.15| 4.39] 3.47| 3.17] 3.74] 3.98] 3.92| 4.46| 5.67] 4.66
6.64} 5.74| 4.82] 3.80] 3.58} 4.21) 4.48) 4.34] 5.04) 6.50) 5.29

4.41] 4.03
5.13} 4.95
6.03) 6.12
6.95) 7.31

3.80) 3.85] 3.26] 2.66

7.13| 5.81] 4.82] 3.83] 3.76] 4.41] 4.61] 4.46] 5.22] 6.93) 5.56
6.73| 5.11] 4.14| 3.35] 3.49} 4.07] 4.14) 4.01) 4.73) 6.57) 5.15
5.20| 3.53] 2.81] 2.34) 2.68] 3.06] 3.02) 2.88} 3.40) 5.11] 3.89
2.66] 1.22} 0.95| 0.90} 1.35} 1.49] 1.26] 1.13] 1.40) 2.70] 1.87

7.56| 8.15
7.34| 8.01
6.01| 6.59
3.56| 3.92

cnna

©

0.41} 0.50)/—0.47/—1.42|—1.13|—0.74|—0.27|/—0.45|—0.81|—0.99 |—0.92 |—0.29 —0.54
10 ||—2.84|—2.97!—3.53 |—3.89|—3.04|—2.30|/—1.91|—2.41|—2.86|—3.06|—3.11|—3 24/—2.93
11 ||-5.51|—5.85|—5.94|—5.76|—4.48 |—3.53|—3.33|—4.05|—4.50|—4.73 |—4.75 |—5.58 |—4.84
Noon. . .||—7.25|—7.58|/—7.36 |—6.82|—5.33 |—4.34|—4.32|—5.18|—5.54|—5.72|—5.67 |—7.00|—6.01

—7.92|—8.17|—7.72 |—7.04|—5.60|—4.68|—4.79 |—5.69 |—5.87|—5.94|—5.90 |—7.49 |—6.41
—7.76|—7.83|—7.22 |—6.59|—5.38|—4.61|—4.77|—5.60 |—5.60|—5.54|—5.60|—7.25 |—6.14
—7.09|—6.98|—6.26 |-5.65|—4.79|—4.19|—4.30|—5.04|—4.86 |—4.66 |—4.95 |—6.57|—5.45
—6.17|—5.99|—5.06 |—4.46|—3.94|—3.47|—3.51|—4.10|—3.80|—3.53 |—4.12|—5.67|—4.48

mW be

—5.15|—4.88|—3.83 |-3.11|—2.88 |—2.52|—2.52|/—2.90|—2.59 |—2.32!—-3 15|—4.61/—8.38
3.92) 3-74 —2.57|—1.71|—1.69|—1.42|—1.40/—1.58/—1.31|—1.10) - 2.03 |—3.35|—2.16
—2.5.) -2.45|—-1.31|—0.34|—0.50|—0.32|—0.29/—0.27/—0.11} 0-00|—6.81/—1.89!—0.90 |

Oat on

9 0.68} 0.38} 1.06] 1.91] 1.53] 1.46] 1.40} 1.76) 1.69) 1.71) 1.42) 1.19] 1.35

10 2.05} 1.64| 1.96] 2.61] 2.16] 1.96] 1.85] 2.30] 2.18] 2.25| 2.21) 2.43] 2.14

il 3.08} 2.57| 2.63] 3.06] 2.57] 2.23) 2.09} 2.54] 2.48| 2.57) 2.68) 3.26] 2.66
Midn. . .|| 3.83] 3.31] 3.17| 3.42] 2.88] 2.41] 2.23] 2.68} 2.70] 2.81] 2.99) 3.80} 3.02

—0.92|—1.04|—0.07| 0.92] 0.63] 0.70} 0.68} 0.90} 0.92) 0.97} 0.38/—0.32| 0.32
6.6 ‘| 1.71] 2.14] 2.09] 1.71] 1.24] 0.97) 1.04| 1.24] 1.42] 1.46] 1.35] 1.60
7. 7 1.76| 2.07] 1.96] 1.60} 1.17] 1.01] 1.19} 1.40) 1.44) 1.44) 1.28] 1.62
8. 8 1.33] 1.44] 1.31] 1.06} 0.79] 0.79) 1.01) 1.19] 1.08} 1.06] 0.88) 1.19
Sead 0.54] 0.43} 0.29] 0.25] 0.20) 0.36} 0.56| 0.65} 0.43] 0.36| 0.25] 0.45
16.10 ||—0.41|—0.65|/—0.79 |—0.63|—0.45|—0.18|—0.02|—0.07|—0.34|—0.41|—0.45
7. 2. 9 ||—0.36|—0.29|—0.32|—0.38|--0.34|—0.27|—0.23 |—0.27 |—0.29 | —0.32 |—0.27
6. 2. 8 | —0.45|—0.29|—0.18 |—0.18|—0.20|—0.18|—0.20|—0.20|—0.18|—0.18 |—0.16
6. 2.10 || 0.54! 0.61} 0.50] 0.38] 0.32] 0.23] 0.18] 0.25] 0.25) 0.25) 0.45
6. 2. 6 ||—1.44|—1.19|—1.01 |—1.06 |—0.97 |—0.90|—0.90|—1.04|—0.92|—0.88 /—0.97
7. 2 —0.88]—0.63|—1.01 |—1.53|—1.28 |-1.15|—1.06|—1.28 |—1.31|—1.33|—1.10
8. 2 —2.12|—1.96|—2.30|—2.70|—2.23 |-1.87|—1.71 |—2.07 |—2.18 |—2.21|—2.12
8. 1 —2.18|—2.14|/—2.54|—2.93| —2.34 |-1.89|—1.73|—2.12|—2.32|—2.41|—2.25
| 7 1 —0.97|/—0.79|—1.26 |—1.76|—1.40 |-1.17 |—1-06|—1.33 |—1.44|—1.53|—1.26 |
| 9.12.3.9 ||—3.31|—3.42|—3.26 |—2.99| —2.43 |—-1.96|—1.87|—2.23|—2.39|—2.41 |

7. 2.2(9)||-0.11|-0.11| 0.02) 0.20] 0.14] 0.16} 0.18] 0.25] 0.20] 0.20

The numbers without sign must be added ; those with the sign — must be subtracted.

F 31

596 XIX.
Inpia. — TrEvANDRUM. Lat. 8° 31/N. Long. 74° 50’ FE. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

1
Hours. Jan. | Feb. |March.) April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Mean. ||
|

2 2.28) 2.20] 2.06; 1.98] 1.69) 1.34) 1.22) 1.44) 1.53) 1.53) 1.70] 2.16) 1.76
3 2.68) 2.72| 2.52) 2.29) 1.95] 1.54) 1.41] 1.66] 1.77] 1.74) 1.98) 2.52) 2.07
4 3

-25| 2.95) 2.55] 2.14) 1.69} 1.59) 1.87) 1.90] 1.93) 2.24) 2.89] 2.35

Morn. 1 1.96) 1:79) 1.69] 1.71} 1.45) 1.18] 1.07) 1.28] 1.33) 1.36] 1.48] 1.89) 1.52
3.09

5 3.36| 3.62} 3.17| 2.58) 2.14) 1.70] 1.67) 1.96] 2.05] 1.98] 2.32) 3.08] 2.47
6 3.26| 3.56] 2.99) 2.27) 1.85] 1.49] 1.55] 1.81] 1.84] 1.78] 2.10] 2.92) 2.29
7 2.67} 2.93) 2.31] 1.57) 1.25) 1.04] 1.19) 1.386] 1.34; 1.28) 1.51] 2.27] 1.73
8 1.58) 1.74) 1.18) 0.54] 0.42} 0.40} 0.60) 0.66} 0.56) 0.50) 0.62] 1.20) 0.83

g 0.18} 0.22)—0.21|—0.63/—0.50|—0-33|—0.12!—0.20|—0.36|/—0.44|—0.41|—0.13|—0.24
10 |, —1.26 —1.32/—1.57|—1.73/—1.35/—1.02|—0.85|-1.07|—1.27|-1.36|—1.38/—1.44|—1.30
11 ||—2.45|—2.60|—2.64|—2.56|—1.99|—1.57|—1.48 |—1.80|}—2.00|/—2.10|—2.11/—2.48|—2.15
Noon. . . ||—3-22|—3.37|—3.27|-3.03 /—2.37|—-1.93|—1.92 |—2.30|—2.46|—2.54|—2.52|—3.11|—-2.67

3.52/—3.63|—3.43|/—3.13|—2.49|—2 08|—2.13|—2.53|—2.61|—2.64|—2.62|—3.33|—2.85
—3.45|/—3.48|—3.21/—2.93|—2.39|—2.05|—2.12|—2.49 |—2.49|—2.46|—2.49 —3.22|/—2.73
3-15|—3.10|/—2.78|—2.51 |—2.13|—1.86|—1.91|—2.24,—2.16|—2.07|—2.20|—2.92 |—2.42

mem WO be
|

—2.74|—2.66 |—2.25|—1.98|—1.75|—1.54/—1 56|—1.82|/—1.69|—1.57/—1.83|—2.52|—1.99

—1.74/—1.66|—1.14|—0.76|—0.75|—0.63|—0.62|—0.70/—0.58|—0.49|—0.90|—1.49 |—0.96
—1.09|—0.58|—0.15)—0.22/—0.14|—0.13|—0.12/—0.05|} 0.00/—0.36|—0.84/—0.40
—0.41|—0.46/—0.03} 0.41} 0.28) 0.21] 0.30} 0.40] 0.41} 0.43} 0.17/—0.14] 0.14

Oat o
|
_
—
_

9 0.30) 0.17) 0.47) 0.85} 0.68) 0.65) 0.62) 0.78] 0.75) 0.76] 0.63] 0.53} 0.60
10 0.91) 073) 0.87) 1.16} 0.96] 0.87) 0.82} 1.02] 0.97) 1.00} 0.98} 1.08} 0.95
11 1.37} 1.14) 1.17} 1.36] 1.14) 0:99] 0.93] 1.18] 1-10) 1.14] 1.19] 1.45] 1.18
| Midn.. .|| 1-70] 1.47] 1.41] 1.52] 1.28] 1.07] 0.99] 1.19] 1.20] 1.25] 1.33] 1.69] 1.34

6 0.76) 0.95] 0.93] 0.76} 0.55] 0.43] 0.46] 0.55] 0.63) 0.65] 0.60} 0.71] 0.67
ch 0.78; 092] 0.87] 0.71] 0.52) 0.45] 0.53] 0.62} 0 64) 0.64] 0.57] 0.72] 0.66
8 0.59) 064] 0.58] 0.47) 0.35] 0.35] 0.45) 0.53} 0.48) 0.47! 0.39} 0.53] 0.49
ty) 0.24) 0.19} 0.13] 0.11] 0.09} 0.16] 0.25; 0.29] 0.19) 0.16) 0.11} 0.20} 0.18
10 —0.18|}—0.29|—0.35|—0.28/—0.20|—0.08 |—0.01 |—0.03 |—0.15|—0.18|—0.20/—0.18|—0.18

—2.28|—2.17/—1.70|—1.38|}—1.28|—1.12/—1.12|—1.29]—1.15| —1.03|/—1.40/—2.05|—1.50
|

7. 2.9 ||—0.16)—0.13|—0.14|—0.17/—0.15|/—0.12)—0.10/—0.12 —0.13 —0.14 —0.12|—0.14/—0.14
6. 2. 8 ||—0.20|—0.13)—0.08|—0.08|—0.09|—0.08 |—0.09 | —0.09|—0.08|—0.08|—0.07)—0.15|—0.10
6. 2.10 024) 0.27) 0.22} 0.17} 0.14] 0.10; 0.08) 0.11} 0.11] 0.11] 0.20] 0.26] 0.17
6. 2. 6 ||—0.64/—0.53|—0.45|—0.47|—0.43/—0.40|—0.40 |—0.46 |—0.41/—0.39 |—0.43 |—0.60/—0.47

7 2 |—0.39|—0.28|—0.45|—0.68/—0.57/—0.51 |—0.47 |—0.57 |—0.58/—0.59 |—0.49|—0.48 /—0.50
8. 2 —0.94 —0.87/—1.02 —1.20|—0.99|—0.83|—0.76 —0.92 —0.97 0.98 —0.94 —1.01/—0.95
8.1 —0.97|—0.95|—1.13)—1.30/—1.04|—0.84 |—0.77|—0.94|—1 03|—1-.07/—1.00}—1.07|—1.01
opel —0.43 —0.35|—0.56|—0.78|—0.62'—0.52|—0.47 |—0.59 |—0.64/—0.68 —0.56|/—0.53|—0.56

1, 9-12.3.9 ||—1.47|—1.52|—1.45|—1.33|—1.08|—0.87 |—0.83 |—0.99 |—1.06|—1.07 |—1.13|—1.41|—1.18
7. 2.2(9) '—0.05|—0.05/ 0.01} 0.09) 0.06} 0.07} 0.08] 0.11] 0.09) 0.09} 0.07] 0.03) 0.05

fe

Dail.ext. || —0.08/—0.01 —0.13/—0.28|—0.18/—0.19 | —0.23 —0.29| —0.28|—0.33|—0.15|—0.13|/—0.19

The numbers without sign must be added; those with the sign — must be subtracted.

F 32

XX. 597
Inpta.— Mapras. Lat. 18° 4’ N. Long. 80° 19’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Fahrenheit.

Hour. Jan. | Feb. March.) April. | May. | June. July. | Aug. | Sept. | Oct. | Noy. | Dec. || Year. |
| mee | | pel uabeS 2
Midnight. | 2.05] 2.54) 2.25| 3.65) 2.74] 3.03] 2.90] 2.86] 2.34] 1.84| 2.05] 1.89|' 2.50
<i jj: - 2-54] 3.26] 2.90] 3.08] 3.31] 3.50} 3.10| 3.01] 2.70] 2.27] 2.54| 2.25|| 2.87]
2 2.96| 3.95] 3.60] 3.57| 3.72| 3.86] 3.55] 3.39] 3.10] 2.79] 3.03] 2.63/| 335
3 3.83} 4.52| 4.25| 4.07| 4.07| 4.27] 3.93] 3.69] 3.55] 3.12] 3.50! 2.96]| 3.77

|
4 3.62| 5.06| 4.79] 4.40| 4.45] 4.68] 4.31] 3.98] 3.95] 3.46] 3.91 3.19 | 4.15
5 3.81| 5.49] 5.24] 4.45] 4.68] 4.95] 4.66] 4.34] 4.23] .3.71| 4.23| 3.60] 4.45
6 4.05) 5.64] 5.11} 3.78] 3.86] 4.21] 4.31] 4.07] 3.82] 3.28] 4.05] 3.73] 4.16|
7 2.43| 3.33| 2.54; 1.78| 2.07} 2.51] 2.92] 2.79] 2.43] 1.80] 2.00] 2.38]| 2.41
, 8 —0.04| 0.29] 0.16 —0.18 —0.11| 0.38| 1.06! 0.99] 0.72! 0.13'-0.56! 0.00! 0.23
9 —2.02 —1.93 -1.89 —2.41 —2.43 -1.73 —0.76 |—-0.90 |—1.12 |—1.26 |-2.49 |-1.73 | -1.72
10 —3.26 —3.60 |-3.67 —4.14 —4.68 3.67 —2.67 |—2.74 —2.96 —2.34 —-3.53 |-3.05 —3 36
11 —4.02 —4.81 |-4.81 —4.83 |—5.75 |—5.02 |—4.25 |—4.16 |—4.54 |-3.17 |-4.09 |-2.62 | —4.42
Noon. || —4.43 —5.06 |-5.35 5.66 5.87 —5.85 —5.51 |—5.28|—5.04 —3.76 —4.31|-3.93 —5.01
1 —4.40 5.35 |-5.42|-5.53 —5.64 -6.05 —6.07 5.75 5.04 —3.73 —4.25 |-3.86 | —5.09
2 —4.14-5.30 —4.99 —4.95 —1.99 —5.69 —6.02 —5.40 —4.66 -3.55 —3.73 |-3.60 | —4.75
3 || 8.46 |—4.85 |—4.27 |—4.07 |—1.00 |—4.61 |—4.92 —4.59 |-3.73 |-3.03 |-3.05 |-2.88 | —3.95
4 —2.41 —3.64 —3.10 —2.65 —2.45 -3.57 —3.73 |-3.44 —2.56 |-2.38 /-1.98 —2.04 | -2.83
5 | |—1.19 —2.27 -1.66 —1.03 —1.01 /—1.91 —2.18 —1.84 /—1.44 |-1.26 |—0.88 —1.01)—1.47
6 ||-0.38/-1.10 -0.52) 0.20! 0.11'—0.58 —0.81 |—0.70 —0.52 |-0.63 |—0.25 —0.38 —0.46
wn | 0.09 0.36] 0.17| 0.83) 0.76| 0.36| 0.16| 0.13| 0.07'-0.18| 0.09| 0.00/! 0.18

|

8 0.54) 0.27| 0.58] 0.99! 1.19) 0.97/ 0.83. 0.74| 0.47| 0.16| 0.47. 0.34/| 0.63
9 0.94; 0.81] 0.97] 1.57) 1.57] 1.42] 1.35) 1.17] 0.99] 0.49] 0.74). 0.67] 1.06
10 +=! 1.89) 1.33] 1.39; 1.89! 1.96, 2.11, 1.87} 1.64! 1.39! 0.90! 1:08) 1.03), 1.50

11 | 1.84] 1.87| 1.84] 2.25] 2.94] 2.41] 2.29] 2.14] 1.89] 1.28 1.46) 1.44) 1.92

6,6 || 1-83) 2.27] 2.29) 1.99] 1.98] 1.81] 1.75] 1.65] 1.65| 1.32| 1.90] 1.67)) 1.84
7,7 || 1.26) 1.48| 1.33] 1.30| 1.41] 1.43! 1.54! 1.46! 1.25! 0.91) 1.04) 1.19 | 1.29
S28 0.25) 0.28) 0.37] 0.40) 0.54] 0.67} 0.94] 0.81] 0.59| 0.14 -0.04| 0.17) 0.43
9,9 | -0.54-0.56 —0.46|-0.42 -0.43 0.15) 0.29] 0.13 —0.06 —0.38 —0.87 -0.53 0.33

10,10 |—0.93 —1.13 —1.14|-1.12/-1.36|-0.78 —0.40|-0.55 —0.78 —0.70 —1.22 -1.01 |-0.93
7,1 |,—0.98|-1.01 —1.44 |-1.87|-1.78 |-1.77 —1.57 |-1.48 1.30 —0.86 —1.12 —0.74 |—1.33
7, 2,9 | 0.26 -0.39 -0.49 —0.53 —0.45 —0.59 -0.58 —0.48 —0.41 —0.42 —0.33 -0.18 0.43

6, 2,10 | 0.43) 0.56 0.50) 0.24) 0.28) 0.21) 0.05) 0.10 0.18 0.21) 0.47, 0.39) 0.30

Mean. | 76.77 78.25, 82.24) 85.73) 87.10 ae 86.22) oo 83.50 81.18 78.53 eel
I | | | | |

The numbers without sign must be added ; those with the sign — must be subtracted.

F 33

598 XX.
Inpra. — Mapras. Lat. 138° 4’N. Long. 80° 19’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Menths, and of the Year. — Dove.

Degrees of Reaumur.

Jan. | Feb. |March.| April. | May. | June. | July. | Aug. el Oct. | Nov. | Dec. | Mean.

1.22 1.06] 1.26) 1.15 1.26] 1.18] 1.04
1.64 1.36) 1.59) 1.42 1.52] 1.46) 1.32
2.10 1.76} 1.94} 1.70 67) dele 7O
2.42 2.10) 2.17} 1.90) 1.4% -70|} 1.88] 1.90

5 2.42) 2.43} 1.61] 2.20) 2.18} 1.95} 1.42) 1.45] 1.62) 1.88] 2.02) 2.17) 1.95
6 2.22) 2.05] 1.48} 1.91] 1.86] 1.77} 1.33] 1.10) 1.39] 1.64) 1.81) 2.25) 1.73
a
8

1.76] 1.30) 1.14] 1.24} 1.19] 1.30} 1.12] 0.75) 1.02) 1.14] 1.27] 2.00) 1.27
1.05} 0.36) 0.54] 0.30) 0.27) 0.70] 0.78} 0.46] 0.47) 0.40) 0.50) 1.32] 0.60

9 0.15|—0.59 |—0.23 |—0.71|—0.75/—0.06| 0.35) 0.16|/—0.23)—0.46/—0.35| 0.27/—0.20

10 |/—0.82|—1.38|—1.04|—1.56|—1.67|—0.82|—0.21/—0.18 |—1.02/—1.26/—1.10|—0.94/—1.00

11 ||-1.74|—1.94/—1.70|—2.12|—2.31|—1.46|—0.86| —0.62|—1.77|—1.83|—1.75|—2.20|/—1.69
Noon. . . ||—2-48|—2.23|—2.06|—2.36 |—2.58)—1.94|—1.52/—1.12|—2.29]—2.18|—2.12|—2.76|—2.14

bn

—2.90|/—2.34|—2.10|—2.34|—2.48 | —2.20|—2.13]—1.57|/—2.47|—2.17/—
—2.97|—2.30|—1.88|—2.14|—2.13|—2.24|—2.47|—1.82|—2.27|—1.91|—2.18] —2.76|—2.26
—2.68|—2.12|/—1.52|—1.84|—1.62|—2.07|/—2.48]—1.77|—1.77|—1.50|—1.98|—2.25 |—1.97
—2.14/—1.81/—1.14/—1.46|—1.11|—1.74|—2.12)—-1.43|—1.12|—1.08 |—1.61}-1.65|—1.53 ||

.25|—2.98 |—2.33
el

~~

m OC bo =

—1.47|—1.34|—0.83|—1.00|—0.65|—1.28|/—1.44|—0.94|—0.50|—0.70/—1.10|—1.13|—1.03 |
—0.81|—0.78|—0.58 |—0.48 |—0.27|—0.78 |—0.65|—0.46 |—0.06|—0.38|—0.58)] —0.72 |—0.55
—0.26|—0.18/—0.35| 0.04] 0.02/-0.30] 0.08|—0.14| 0.18|—0.14|-0.14/-0.39|—0.13 |!

0.13] 0.30)—0.08} 0.49| 0.26] 0.12} 0.62)—0.04| 0.27} 0.06) 0.36/—0.06| 0.20

Dt n on

9 0.38| 0.62) 0.42) 0.71] 0.45] 0.42) 0.86/—0.06| 0.33] 0.26) 0.64] 0.30] 0.44
10 0.58) 0.77| 0.60; 0.90! 0.61] 0.63} 0.91|-0.06| 0.44) 0.46] 0.81) 0.66] 0.61
11 0.79| 0.84) 0.91} 0.91] 0.78] 0.79} 0.87] 0.11] 0.66) 0.67} 0.83) 0.99] 0.76

Midn. .. || 1.06} 0.96) 1.16} 0.92} 0.98) 0.94] 0.84] 0.47] 0.95) 0.91} 0.89] 1.22} 0.94
6. 6 0.71) 0.64| 0.45) 0.72] 0.80] 0.50} 0.34] 0.32] 0.67) 0.63] 0.62) 0.77] 0.60
hon 0.75} 0.56| 0.40) 0.64) 0.61] 0.50) 0.60} 0.31) 0.60} 0.50) 0.57) 0.81] 0.57 |
8. 8 0.59| 0.33] 0.23} 0.40) 0.27) 0.41] 0.70} 0.21] 0.37) 0.23] 0.43/ 0.63) 0 40
9. 9 -|| 0.27} 0.02) 0.10|/-0.00|—0.15| 0.18] 0.61] 0.05} 0.05|—0.10} 0.15} 0.29] 0.12 |

10.10 —0.12|—0.31|—0.22|—0.33|—0.53|—0.10|—0.35|—0.12|/—0.29 —0.40|—0.15|—0.14|—0.20

7.2. 9 ||-0.28|/—0.13|—0.11|—0.06/—0.16|—0.17/—0.16| —0.38|—0.31/—0.17|/—0.09|—0.15/—0.18

6. 2. 8 |/-0.21| 0.02/—0.16} 0.09/—0.00|—0.12/—0.17|—0.25|—0.20|—0.07/—0.01/—0.19|—0.11

6. 2.10 ||-0.06) 0.17) 0.07) 0.22) 0.11/ 0.05)—0.08|—0.26|—0.15) 0.06) 0.15) 0.05 0.03

6. 2. 6 |/—0.52/—0.34|—0.33|—0.24|—0.18 |—0.42|—0.60/—0.39|—0.31|—0.22/—0.32|—0.41|—0.36 ||

7. 2 —0.61|/—0.50|—0.37 /—0.45 | —0.47|—0.47/—0.68|—0.54/—0.63 | —0.32)—0.46 —0.38 —()550 |

8. 2 \-0.96|--0.97/—0.67|—0.92|—0.93|—0.77/—0.85/—0.68 /—0.90|—0.76 —0.84 —0.72'—0.83 |,

8. 1 —0.93 |—0.99|—0.78|—1.02)—1.11]—0.75|—0.68 | —0.56 |—1.00|—0.89| —0.88 |—0.83|—0.87

7 1 —0.57|—0.52|—0.48 |—0.55 |—0.65 |—0.45/—0.51|—0.41|—0.73|—0.52)—0.49| —0.49 :—0 53 |

|
}
| 9.12.3.9 ||—1.16|—1.08|—0.85/—1.05/—1.13|—0.01|—0.%9|—0.70|—0.99|—0.97|—0.95|—1.11|—0.97 |

7. 2.2(9) ||-0.11) 0.06} 0.03) 0.13/—0.01|-0.03|} 0.09|—0.30 —0.15|—0.06| 0.09|—0.04|—0.03

Dail.ext. |/-0.28) 0.05/-0.25'—0.08 |—-0.20/—0.15/—0.53|—0.08 /—0.39/-0.15|—0.12|-0.37/—-0.19 |

The numbers without sign must be adued ; those with the sign — must be subtracted.

if 34

Inpra. — BomBay.

XXII.

Lat. 18° 56’ N. Long. 72° 54’ E. Greenw.

599

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Fahrenheit.

Hours.
Morn. 1
2
3
4
5
4
7
8
9
10
11
Noon. . +
1
2
3
4
5
6
ib
8
9
10
11
Midn...
6. 6
Yoel
8. 8
9. 9
10.10
|
dari
6. 2. 8
62°25107||
6. 2. 6
Wa 2
8. 2
8.1
a

1.49
1.80
2.27
2.86

3.47
3.83
3.69
2.97

1.69
0.07
—1.55

—2.86

—3.69
—3.98
—3.85
—3.42

—2.84
—2.18
—1.49
—0.79

(era
0.47
0.92
1.24

0.81
1.10
1.08
0.79
0.27

—0.14
—0.32

0.11
(eg)

—0.16
—0.52
-0.36

0.00

Feb.

1.40
1.69
2.21
2.84

3.40
3.62
3.33
2.48

1.22
—0.23
—1.55
—2.61

—3.29
—3.60
—3.65
—3.42

—2.95
2.27
—1.44
—0.56

0.23
0.81
1.10
1.26

0.68
0.95
0.97
0.72
0.29

—0.02
—0.18

0.27
—0.74

—0.14
—0.56
—0.41

0 02

March.

0.99
1.33
1.91
2.59

3.04
3.06
2.54
1.58

0.38
—0.77
—1.67

-2.30

—2.66
—2.84
—2.86
—2.72

—2.34
eel
—0.88
—0.07

0.56
0.90
0.97
0.92

0.68
0.83
0.77
0.47
0.07

0.09
0.05
038
—0.50

—0.16
—0.63
—0.54
—0.07

April.

1.13
1.51
2.05
2.48

2.61
2.34
1.67
0.77

—0.14
—0.90
Sea
—1.91

—2.25
—2.50
—2.61
—2.50

—2.07
Nees
—0.54

0.23

0.72
0.92
0.92
0.95

0.50
0.56
0.50
0.29
0.00

—0.05
0.02
0.25

—0.52

—0.48
—0.88
—0.79
—0 29

May.

1.42
1.78
2.14
2.32

2.23
1.80
1.15
0.36

—0.41
—1.06
—1.55
—1.94

—2.21
—2.34
—2.32
—2.09

—1.64
—1.04
—0.38

0.18

059
0.83
0.99
1.15

0.38
0.38
0.27
0.09
Oot

—0.20
—0.11

0.09
—0.52

—0.61
099
—0.92
—0.54

June.

1.15
1.40
1.69
1.91

1.96
1.80
1.42
0.88

0.23
—0.43
—6.08
—1.64

—2.12
—2.41
—2.45
—2.25

es
—1.15
—0.47

0.14

0.54
0.79
0.96
0.99

0.34
0.47
0.50
0.38
0.18

—0.16
—0.16

0.07
—0.59

—0.50
—0.77
—0.63
—0.36

July. | Aug.

0.79| 0.97
0.88} 1.13
0.90| 1.24
0.90) 1.31

0.86) 1.31
0.79| 1.24
0.65| 1.04
0.38) 0.74

0.00) 0.32
—0.52)—0.20
—6.08|—0.79
—1.55|—1.35

—1.82|—1.78
—1.78|—2.00
—1.44|—1.98
—0.92|—1.69

—0.38|—1.24
0.09|—0.72
0.38 |—0.23
0.50) 0.16

0.54| 1.43
0.54| 0.59
0.61) 0.72
0.70) 0.83

0.43} 0.25
0.52} 0.41
0.45} 0.45
0.27| 0.36
0.02} 0.20

—0.20|—0.18
—0.16|—0.20
—0.16|—0.07
—0.29|-0.50

—0.56|—0.50
—9.70|—0.63
—0.72|—0.52
—0.59|—0.38

\-0.61|—0.65

-02,—0.02|—0.02

0.86
0.97
1.24
1.53

1.71
1.67
1.22
0.79

0.09
—0.65
—1.28
—1.80

—2.12
—2.25
—2.16
—].87

—1.37
—0.74
0.05
9.47

0.86
0.99
0.97
0.88

0.45
0.63
0.63
0.47
0.18

—0.07
—0.05
0.14

—0.45)

—0.52
—0.74
—0.68
—0.45

1.49
1.87
2.32
2.75

2.95
2.79
2.21
1.28

0.16
—0.95
eal
—2.59

—2.99
—3.13
209
—2.66

—2.14
—1.46
—0.72
—0.02

0.52
0.88
1.08
1.26

0.68
0.74
0.63
0.34
—0.05

—0.14
—0.11

0.18
—0.61

—0.47
—0.92
—0.86
—0.41

—1.24
0.02

2.03} 1.55
2.18] 1.87
2.45| 2.41
2.81} 3.11

3.11] 3.78
3-15] 4.16
2.79! 4.01
1.91} 3.24

0.63| 1.87
—0.83| 0.16
—2.21|—1.60
—3.29|—3.08

—3.92|—4.10
—4.07|—4.59
—3.85|—4.55
—3.33|—4.12

—2.61|—3.38
—1.78)—2.45
—0.88/—1.46

0.00)—0.52

0.77) 0.29
1.35] 0.86
1.71| 1.19
1.91| 1.37

0.70) 0.86
0.95) 1.28
0.95) 1.35
0.70} 1.08
0.25) 0.52

—0.18|—0.09
—0.32|—0.32

1.26
1.53
1.91
2.27

2.54
2.52
2.14
1.44

0.50
—0.52
—1.49
—2.25

—2.75
—2.95
—2.90
—2.59

VY
—1.40
—0.68
—0.02

0.50
0.83
1.01
1.13

0.14] 0.14] 0.14 ||
—0.90|—0.97|—-0.61

—0.65|—0.29|—0.41

—1.08|—0.68

—1.01|—0.43/—0.65
—0.56|—0.05|—0.32 |

0.07; 0.00} 0.05

The numbers without sign must be added; those with the sign — must be subtracted,

35

600

Inp1a. — Bompay.
Corrections to be applied to the Means of the Hours of Observation to obtain the true

XXIll.
Lat. 18° 56’N. Long. 72° 54’ E. Greenw.

Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Reaumur.

Rw

mat n or

©

Secs

wm ~

So
— me bO bo

7.

9.12.2.9
7. 2.2(9)

Dail. ext.

F

—1.64
1.77
lea
—1.52

|—1.26

—0.97
—0.66
—=(Oro0:

—0.05
0.21
0.41
0.55

0.36
0.49
0.48
0.35
0.12

—0.06
0.14
0.05

—0.35

—0.07
—0.23
—0.16

0.00

—0.57
~—0.06

—1.46
1260)
—1.62
—1.52

—1.31
—1.01
—0.64
—0.25

0.10
0.36
0.49
0.56

|—0.41|

0.17
0.17
0.12
0.04
—0.05

—0.09
—0.05

0.04
—0.23

=O e211
—0.44

—0.24

—0.45
0.00

0.00)

July.

June.

—0.81
—0:79
—0.64
—0.41

—0.94
—1.07
—1.09
—1.00

—0.17
0.04

—0.79
—0.51

0.17
0.22

—0.21
0.06

0.24
0.24
0.27
0.31

0.24
0.35
0.40
0.44

0.19
0.23
0.20
0.12
0.01

0.15
0.21
0.22
0.17
0.08

—0.09
(5 O17)
—0.07
—0.13

= (507
—0.07

0.03
—0.26)

—0.25
—0.31
—0.32
—0.26

—0222
—0.34
—0.28
—O 516

= 02H
\—0.01

(Oro
0.01

—0.11|—0.21

Aug. | Sept.

0.43
0.50
0.55
0.58

0.58
0.55
0.46
0.33

0.14
—0.09
—0.35
—0.60

O49
Set
—0.88
—0.75

—0.55
—0.32
—0.10

0.07

0.19
0.26
0.32
0.37

0.20
0.28
0 28
0.21
0.08

0.11
0.18
0.20
0.16
0.09

—0.08
—0.09
—0.03
—0.22

—0.03
—0.02

0.06
—0.20

—0.22
—0.28
—0 23
— (os

—0.23
=—(roo
—0.30
—0.20

—0.29
—0.01

-0.34
0.08

—0.16|—0.12

Oct.

0.30
0.33
0.28
0.15
—0.02

—0.06
—0.05

0 08
0°27

=0:21
—0.41
—0.38
—0.18

—0.55
0.01

—0.04.

—1.74
—1.81
—1.71
—1.48

—1.16
—0.79
—0.39

0.34
0 60
0.76
0.85

0.31
0.42
0 42
0.31
0.11

—0.08
—0.14

0.06
—0.40

—0:29
—0.48
—0.45
—0.25

—0.64
0.02

=0-21

0.69
0.83
1.07
1.38

0.56
0.68
0.85
1.01

1.68
1.85
1.78
1.44

1.13
1.12
0.95
0.64

0.83} 0.22
0.07|/—0.23
—0.71\-0 66
—1.37/—1.00

—1.82
—2.04
—2.02
—1.83

—1.22
—1.31
—1.29
—1.15

—1.50
KOS
—0.65
—0.23

—0.92
—0.62
—0.30
—0 01

0.13
0.38
0.53
0.61

0.22
0.37
0.45
0.50

0 38
057
0.60
0.48
0.23

0.25
0.33
0.32
0.22
0.07

—0.04)-0.05
—0.14|—0.07

0.06} 0.06
—0.43|—0.27

—0.13/—0.18
—0.30|—0.34
—0.19|—0.29
—0.02|—0.14

—0.61|—0.46
000; 0.02

—0.10|—0.09

The numbers without sign nust be added; tnose with the sign — must be subtracted.

36

Inpra. — Manpras.

XXIV.

Lat. 13° 4’ N. Long. 80° 19’ E. Greenw.

601

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hour. Jan. Feb. | March.
Midn. || 0.91] 1.13} 1.00
1 AS wore hey
2 1.32] 1.76} 1.60
3 1.48} 2.01| 1.88
4 || 1.61] 2.25} 2.13
5 1:74| 2.44) 2.38
6 1.80| 2.51} 2.27
7 1.08/ 1.48] 1.13
g ||-0.02) 0.13| 0.07
9 | —0.90/-0.86 —0.84
10. ||—1.45|—1.60 |—1.63
11 | —1.79/-2.14|-2.14
Noon. ||—1-97 | —2.25 |—2.38
1 (1.96 —2.38 |—2.41
2 ||—1.84|—2.36|—2.22
3 ||\-1.54|-2.16|—1.90
4 | -1.07|-1.62|-1.38
5 |/—0.53/—1.01 |-0.74
6 |\—0.17|—0.49 |—0.23
7 0.04'-0.16| 0.07
8 0.24} 0.12] 0.26
9 || 0.42] 0.36] 0.43
10 0.62) 0.59| 0.62
11 0.82) 0.83) 0.82
Mean. | 19.90 | 20.56 | 22.33

April. | May. | June.

1.22
1.47
1.65
1.81
1.98
2.08

1.62
1.37
1.59
1.81
1.96
1.98

1.35
1.56
1.72
1.90
2.08
2.20

1.68
0.79
—0.08
—1.07
—1.84
—2.15

1.72
0.92
—0.05
—1.08
—2.08
—2.56

1.87
1.12
0.17
(erie
—1.63
—2.23

—2.52
—2.46 |
—2.20
—1.81}
—1.18
—0.46

—2.61
—2.51
—2.22
—1.78
=I 09
—0.45

—2.60
—2.69
—2.53
—2.05
—1-59
—0.85

0.05
0.34
0.53
0.70
0.87
1.04

0.09
0.37
0.44
0.70
0.84
1.00

—0.26
0.16
0.43
0.63
0.94
1.07

|

23.88 24.49

24.45

July.

1.19
1.38
1.58
1.75
1.92
2.07

1.92
1.30
0.47
—0.34
—1.19
—1.89

—2.45
=2.70
—2.67
—2.19
—1.66
—0.97

—0.36
0.07
0.37
0.60
0.83
1.02

Aug.

1.27
1.34
1.51
1.64,
1.77
1.93

1.81
1.24
0.44
—0.40
—].22
—1.85

—2.35 |
—2.56
—2.40
—2.04
—1.53 |
—0.82

—0.31
0.06
0.33
0.52
0.73
0.95

(24.10 | 23.34 | 22.89 21.86 20.68 19.89

Sept. | Oct. Noy. Dec.
1.04) 0.82) 0.91] 0.84
1.20} 1.01] 1.13] 1.00
1.38} 1.24] 1.35] 1.17
1.58| 1.39| 1.56] 1.32
1.76| 1.54| 1.74] 1.42]
1.88/ 1.65) 1.88| 1.60
1.70| 1.46| 1.80| 1.66
1.08| 0.80] 1.89] 1.06
0.32) 0.06 —0.25| 0.00
—0.50 —0.56 —1.11|—0.77)
—1.32 |—1.04 |—1.57 |-1.36
—2.02 | —1.41 |—1.82 |—1.61
—2.24 | —1.67|—1.92 |—1.75

—2.24|—1.66 |—1.89 |—1.72
—2.07|—1.58 |—1.66 |—1.60
-1.66 -1.35 —1.36 —1.28
—1.14 —1.06 —0.88 —0.91

—0.64 |—0.56 | -0.39 os

—0.23 —0.28
0.03 -0.08 |
0.21) 0.07

0.22

0.40)

0.57

—0.11 |—0.17
0.04
0.21
0.33
0.48
0.65

0.15]

0.62

0.84 0.64

|
|
|
|
|

0.00 |)

0.30};
0.46)

| Year.

m= wm Ww
as? Lette,

1.
1.
1.
1.68
1.
a

1.
1.
0.
—0.77
Sle
Ils

a = tb

|
_
;

11
28
49

85
98

85
07
10

49
47

le )

ao —_

to
S

Inpra. — BomBay.

XXV.

Lat. 18° 56’ N. Long. 72° 54’ E. Greenw. — Dove.

Degrees of Reaumur.

Hour. | Jan. | Feb. |March.| April. May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. Year. |
Midn. 1.76 | 1.68 1.43 1.40) 1.30| 0.80) 0.57) 0.59) 0.92 | 1.36 | 1.74] 1.93 1.29,
1 1.91 1.88 | 1.65| 1.54| 1.40} 0.89} 0.65} 0.64) 0.98 | 1.52 | 1.80) 2.00)/ 1.40)

2 2.04 2.04 1.80] 1.75) 1.54) 0.88) 0.63) 1.16] 1.09) re 1.97| 2.18)|| 1.56

3 2.18| 2.22} 1.90| 1.92) 1.69] 0.94] 0.65] 0.81) 1.18] 1.74) 2.11] 2.28]} 1.63

4 2.39 2.44 2.26| 2.02} 1.81] 1.04] 0.76) 0.82 1.25) 1.89 | 2.23| 2.41) 1.78;

5 || 2.65| 2.68] 2.42] 2.26] 1.92) 1.09| 0.83| 0.90} 1.25; 1.96) 2.40) 2.62)| 1.92!

6 2.88| 2.88) 2.60 2.20) 1.65| 1.03] 0.84) 0.84} 1.21 | 2.00| 2.55] 2.66 il

ia 2:53) 2:37) 1-61 | 0.76 | 0.44) 0.60 0.55] 0.51; 0.61) 1.02 | 1.47| 2.08|) 1:21)

8 0.72 0.48 -1.04 -0.62 —0.51 —0.01 0.02} 0.08 |—0.20 —0.31 —0.12 | 0.20||—0.11 |

9 —1.04 —1.05 —1.49 | —1.53 —1.30 (—0.46 | —0.46 |—0.45 |—0.84 —1.53 —1.40 —1.00)|—-1.05)

‘| 10 —2.40 | —2.29 \—2.28 —2.00 —1.73 \ 0.79 |—0.74 |—0.76 |—1.32 —2.17 (72.38 —2.14]|/—1-75)
IL 11 ||-3.08 |—2.98 |—2.54/—-2.20 —2.08 |—1.18 |—1.07|—1.12|—1.51 —2.38|—3.18 —2.94/—2.19 |
== = —————

The numbers without sign must be added; those with the sign — must be subtracted.

37

602

XXV.

InprA. — Bompay, Continued.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

| Hour. | Jan. Feb. | March, April. | May. | June. | July. | Aug. Sept. | Oct. Nov Dec. | Year. |
| Noon. ||—3.40/—3.29 —2.52|~2.44|-2.82 —1.40|—1.09 | -1.34 | —1.72 | —2.39 | —3.26 —3.32 —2.37
| 1 '-3.02 —3.12|—2.67 |—2.53 —2.28 | —1.50 |—1.12 | —1.35 | -1.77 | —2.22 | -2.96 —3.35, —2.32
| 2. ||—2.78|—2.89 |—2.56 | —2.32 |—2.14|—-1.52 | —0.97 | —1.35 | —1.55 ; —2.09 | —2.55 | —2.97 || —2.14
| 3 \-2.38 —2.54 |—2.25 —2.05 —1.85 —1.31|—0.85 | —1.09 | —1.37 | —1.79 | —2.22 | —2.59 || —1.86
| 4 1.96 —2.07 |—1.72 —1.49 —1.36 —0.89 | —0.63 | —0.76 | —0.95 | —1.38 | —1.55 | —2.03 | -1.40
| 5 |\-1.30 —1.41|}—1.08 |—0.96 —0.83 | —0.49 |—0.36 | —0.34 | —0.36 | —0.61 | —0.67 | —1.09 || —0.79
|| 6 |\-0.64|-0.44'-0.16) 0.00| 0.09/-0.02| 0.03 0.13) 0.14) 0.01 —0.14/ —0.52 |-0.13

7 | —0.28 |—0.07 0.19) 0.43! 0.63; 0.22) 0.21] 0.26| 0.28) 0.30; 0.09|—0.23]) 0.17

8 | 0.00} 0.23) 0.48) 0.66] 0.87} 0.39} 0.28) 0.384) 0.44] 0.53) 0.36] 0.10)} 0.39

9 0.58) 0.63) 0.80) 0.83) 0.92) 0.44) 0.36) 0.41) 0.58) 0.76) 0.85! 0.75) 0.66

10 | 1.16) 1.15 1.04, 1.09} 0.95] 0.52} 0.41) 0.52! 0.78} 0.96] 1.32) 1.35]| 0.94

11 | 147) 2.48) 1.20), W244. We0F)|_ 0270)|. (0.48). 02561) 10:89). a8), 1858) 65)" 113
laes|| eget cre | Fi velo
|| Mean. || 18.38 | 19.30} 21.00 22.50 | 23.43 | 22.35 | 21.67 | 21.45 | 21.42 | 22.08 | 21.28 | 19.54
| XKVIE

Inpia.—Caxcutta. Lat. 22° 33/5’ N. Long. 88° 19/2” E. Greenw.— Dove.

Degrees of Reaumur,

|| four. | Jan Feb. | March. April. | May. | June. | July. | Aug. | Sept. | Oct. | Noy. Dec. Year.
i = | | | | elk
|| Midn. 1.86] 1.69} 2.06] 1.60} 1.90} 1.12] 0.69| 0.69] 0.71] 1.00] 1.24] 1.51]| 1.34]
| 1 2.242200) 2.37 | 296): 2.06), Ae 2))- 10:80) (0578) KOSTEN h Vera) el Arc) mallcrea (|edit)
| 2 2.53)|| 2.22)! 2.62) 2.18) 2.21) 1.16), (0.91) 10.85; 0:84) )1.26)),) 1.69) 52-00!) 1071

3 2.80)|\ 2.44) 25843) 2°27) 2.32) (1.29)) 1.02)|) 0-921) 10.93 | 26) ple82 223i ess

4 3.06|, 2.71] 3.08] 2.40} 2.41] 1.29} 1.11] 0.96] 1.04) 1.46] 2.00} 2.40]/ 1.99)
| 5 3.00|'2.89) 3.28) 2.47) 2.50) 1.384) 1.24) 1.07) ' 1.16) 1.53) * 2.22") 2:66))|- 2214

6 3.53! 3.11] 3.42) 2.53) 2.41) 1.84] 1.24] 1.12) 1.16] 1.62] 2.36) 2.80)]| 2.22
\ tl 8.71| 3.24] 3.42) 2.22] 1.90) 1.03) 0.96! 0.89) 0.93] 0.86) 2.31) 2.93]/ 2.03
| 8 2.73) 2.20) 1.97) 2.18) 0.81) 02455) 042 || “0.32)) 05277), 0:31 0293)| 91-68)]| ea
9 0.91| 0.71) 0.46, 0.11) —0.34|—0.13 }—0.16 |—0.22 |—0.24/—0.47|-0.13| 0.35) 0.07
| 10 |—0.78|—0.62)—0.98 |—0.44|—1.39 |—0.66 | —0.69 | —0.33 |—0.73 |—0.58 —1.02 —0.76)|—0.75
| 11 =||—2.09 | —1.64|) —2.14 |—1.82 |—2.14|—1.15 | —1.13 | —1.08 |—1.16|}—1.60 —1.91 |—1.87|| —1.64)
|
| Noon.. '|—3-31 |—2.62 | 3.16 | —2.67 | —2.76 |—1.60 | —1.51 | —1.51 | —1.40 —1.94 —2.44 /—2.80 —2.31)
| 1 —1.14/—3.28 | -3.87 |—3.09 | —3.12 |—1.68 | —1.58 |—1.55 |—1.44 —2.05 —2.80 —3.29|| —2.66
| 2 |—4.52|—3.64|—4.25 |—3.47 | —3.32 |—-1.73 | —1.29 | —1.80 | —1.63 | —2.12 | -3.07 | -3.69 || —2.88
| 3 ||—4.65 —3.87 | —4.40 |—3.62 —3.43 |—1.92 | —1.24 | —1.20 |—1.27/—1.83 | —2.98 | —3.69 || —2.84
4 ||—3.78 —3.69 —4.23 |—3.40 |—3.10|—1.53 —0.96|—0.95 —0.91 |—1.49 |—2.18 |—2.76| —2.41
| 5 —3.07 | —3.13 | —3.36 | —2.73 | —2.43 |—1.20 (0.64 |—0.68 0.56 |—0.92 |—1.60 —2.18]| —1.88
6 |—1.87)—1.91 | —1.96 | -1.42|—1.23 |-—0.57 —0.31|—0.31 (0.16 —0.25 —0.76 —1.34)| —1.01

| |
| 7 |—0.96 ala —0.31 |—0.14 |—0.11 | —0.07 rece 0.04) 0.13 )—0.22 —0.63)| —0.34
| 8 |—0.20|—0.22| 0.00} 0.40; 0.68} 0.20; 0.09 0.25, 0.22) 0.42! 0.27/—0.05|| 0.17
9 0.42] 0.38] 0.73) 0.89) 1.08] 0.49) 0.22) 0.45) 0.33] 0.60] 0.62) 0.44|| 0.55
i 10 0.95) 0.80 1.22) 1.20) 1.46) 0.63| 0.36] 0.56) 0.47; 0.75) 1.07] 0.93|) 0.87)|
| 11 1.37] 1.20) 1.66) 1.54] 1.64| 0.74] 0.49 0.65, 0.60) 0.88 1-16) 1.20|| 1.09
| | i
lanes | Tee tioe el
| Mean. 15.49 | 17.57 | 21.19 | 22.51 | 24.01 | 23.29 | 22.68 | 22.86 | 22.42 | 21.73 | 18.88 | 16.36 |
_ = ee == a = =
The numbers without sign must be added ; those with the sign — must be subtracted.
Ry 38

XXVII.° 603
Asta. — TiFuis. Lat. 41° 41’ N. Long. 45° 17 E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

a | Jan. Feb. | March.) April. | May. | June. | July. | Aug. | Sept. | Oct. Nov. Dec. | Year.

Mian. | 0.87; 1.01) 1.54) 1.81) 1.95| 2.38) 2.43) 2.22) 1.60) 1.38) 0.99) 0.80) 1.58|
1 1.02} 1.15] 1.80} 2.10) 2.28] 2.67] 2.79| 2.52] 1.81) 1.64] 1.16] 0.94|| 1.82

2. 1.17] 1.33] 2.02] 2.40) 2.58) 2.94] 3.13] 2.82) 2.08) 1.88; 1.37| 1.04] 2.06
3 1.32) 1.47) 2.23! 2.64) 2.84| 3.22] 3.49] 3.13] 2.29; 2.11) 1.59| 1.14) 2.28
4 1.46} 1.57) 2.39] 2.94) 3.14] 3.43] 3.73) 3.44) 2.59) 2.39) 1.73) 1.25), 2.51
5 1.60} 1.69] 2.58} 3.12) 3.09} 3.09} 3.55] 3.59) 2.74| 2.62) 1.85] 1.35]| 2.57
6 1.76| 1.75| 2.63] 2.89| 2.39] 2.35] 2.77| 3.06] 2.63) 2.77] 1.99] 1.40] 2.37
7 1.87] 1.75] 2.14] 2.19} 1.53] 1.28] 1.50) 2.16] 1.99) 2.38) 1.85] 1.42)| 1.84
8 1.40) 1.23] 1.23] 0.99] 0.53) 0.35) 0.70} 1.05} 1.07| 1.52] 1.44] 1.19)| 1.06
9 0.05} 0.50) 0.16|—0.22|—0.51|—0.65 .82|—0.21/—0.03| 0.30) 0.54} 0.49]| 0.01
10. ||—0.41 | —0.46 | —0.94 | —1.20 | —1.41 | —1.66 | —1.35 | —1.32 | —1.15 | —0.47 | —0.46 0.19 | —0:92
11 }}—1.17/—1.33 | —1.85 | —2.06 | —2.19 | —2.40 | —2.27 | —2.20 | —2.01 | —1.77 | —1.31 | —1.11 || —1.81

| Noon. ||—1-91 | —1.94 |—2.64 | —2.77 | —2.89 | —2.42 | —2.99 | —2.89 | —2.67 | —2.53 | —2.07 | —1.76 || —2.46}
1 —2.37|—2.45 | —3.12 | —3.29 |—3.21 | —3.42 | —3.53 | —3.60 | —3.17 | —3.07 | —2.50 | —2.21 || —3.00|

2 ||-2.59| -2.65 | -3.25 | -3.37 | -3.34|—-3.50 | -3.68 | —3.85 | -3.41 | -3.56 | —2.81 | —2.38|, —3.20)
3 ||-2.33|—2.58|—-3.21 | —3.41 |—3.25 |-3.51 | -3.82 | -3.98 | -3.37 | -3.41 |—2.55 |—2.08|/ —3.12|
4 |=1.78 —2.07 | —2.78 | —3.20 | —2.97 | -3.39 | —3.82 | —3.72 | —2.95 | —2.81 | —1.87 | —1.43 || —2.73 |
5 | —0.99 | -1.24|—2.08 | -2.46 | —2.65 | —2.86 | —3.47 | 3.20 | —1.53 | 1.85 | —1.27 | —0.90|| —2.04
1 6 ||-0.57|-0.60|—1.11|—1.56|—1.47|—1.81 |-2.36 | —2.01 | —1.18 | —-1.17 |—0.73 |—0.49 |! -1.26
| 7 ||-0.17|—0.19 | —0.48 | —0.69 | —0.45 | —0.63 | —0.86 | —0.85 —0.46 | 0.50 |—0.35 |-0.13 0.48 |
8 | 0.15) 0.19] 0.12|/-0.02) 0.26) 0.23] 0.13|—0.02| 0.18| 0.11/—0.02| 0.19] 0.12)
| 9 | 0.33) 0.44] 0.51] 0.64] 0.83] 0.92} 0.87) 0.72| 0.61) 0.50| 0.24] 0.36] 0.58)
; 10 || 0.55| 0.65] 0.91] 1.05} 1.28} 1.51) 1.44) 1.33] 1.00) 0.81] 0.48) 0.53)| 0.96
11 || 0.69) 0.89] 1.25]} 1.45} 1.63) 1.95] 1.96] 1.80] 1.32) 1.10| 0.76 0.68 | 1.29)

|
i!
!
|

Mean. | —0.20)| 3.00 | 5.64 | 9.99 |13.54|16.10 | 19.01 | 19.43 | 15.03 | 11.40) 5.07 | 2.45 ||

7 XXVIII.
Cuina.— Pexine. Lat. 39° 54’N. Long. 116° 26’ E. Greenw. — Dove.

Degrees of Reaumur.

Hour. | Jan. | Feb. "March. | April. May. | June | July. Aug Sept. | Oct. Noy Dec Year |
Mian. |} 1.16] 1.70] 1.83 1.75, 2.19] 2.24) 1.61] 1.49) 1.69} 1.64) 1.19] 1.25] 1.64
We oll, 1247's 2.07). 2219)) 2.26) :2°76| 2.73) 1.89!) 3.80) 2:04) 2:05) -¥.47| 1.89\|/ 2:01
2 1.66) 2.35| 2.78 2.67 3.20! 3.12| 2.23} 2.04] 2.32] 2.87] 1.68] 1.65|| 2.34
3 1.93} 2.55| 2.93) 3.18] 8.72) 3.47| 2.50] 2.31 2.55 2.62| 1.88| 1.83|| 2.62
4 21S | 2:80 eS27/ (NS a7 aS | 8.82 2.74!) 2/54 2.97] 2.92| 2.01} 2.46]| 2.95
5 2.41} 2.94) 3.57| 3.89) 4.30 3.88] 2.78| 2.71] 8.10) 3.19] 2.20, 2.10)| 3.09
|
6 2.58| 3.15) 3.65| 3.81} 3.37) 2.86| 2.10] 2.46] 2.96 3.43| 2.32) 2.18]| 2.91
7 2.63| 3.21; 3.19| 2.91] 2.30) 1.95| 1.34| 1.65| 2.10; 2.98| 2.30/ 2.29]| 2.40
8 2:23) 2.37| | 1.84) 1 0.65) 1.19| 1.07| .0.52| 0.76 0.87 1.68} 1.39] 1.73|| 1.44
9 0.77} 0.70} 0.49| 0.34) 0.00) 0.03|—0.12|—0.20|—0.24 0.15] 0.19, 031/| 0.20
| 10 ||—0.57 —0.65|—0.81/ —0.79 —1.20 —1.06 —0.97 —1.09 -1.36 —1.05 | —0.84 —0.97||—0.95
11 ||-1.35/-1.90'-1.93 | —2.03 —1.24 —2.17 —1.71|—1.67 | -2.17 —2.18 | —1.74 —1.96)/—1.84

Ne = ———

The numbers without sign must be added ; those with the sign — must be subtracted.

F 39

604

XXVIII.

Cuina. — Pexine, Continued.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur

Hiour.

Noon,

Or we GO bo

cman n

10
11

Mean.

Jan. Feb.

-2.83
-3.01
~3.37
—3.40
-2.88
|-1.79

—2.80
|—3.54
—3.84
—3.94
—3.65
—2.83

-0.97|-1.79
—0.48!-0.15
|-0.02 |-0.27
0.30) 0.26
0.57) 0.73
0.90) 1.20

'—3.57 '—2.04|

March.

2.95
3.54
—4°03
—41.12
=3.92
—3.21

—2.20
—1.05
—0.30
0.26
0.83
1.30

|—3.86

3.42

April.

—2.92
—3.59
—3.98
—4.06

—3.24

—2.34
-1.13
—0.33
0.24
0.84
1.28

9.66

May. | June.
—3.05 | —2.92
—3.74 —3.55
—4.08 |-3.97
—4.24;—4.00
—4.03 |-3.74
—3.65 |—-3.31
—3.04 |-2.44
—1.18 |-1.21
—0.19|—0.11
0.59| 0.59
1.15| 1.14
1.67) 1.65
15.83 | 19.61 |

July. | Aug. | Sept. | Oct.
~2.24|-2.02|-2.77/-3.03
—2.65 |-2.64 3.10 —3.65
-2.88 —2.90 -3.38 —3.96
-2.85 —2.94/-3.44 -3.97
-2.74 | 2.79 | -3.06 |-2.43
-2.36 |—2.20 | -2.34 | -2.34
-1.76 |—1.45 | —1.18 | —1.12
—0.72|-0.45|-0.50 —0.54
0.12! 0.08} 0.09 —0.02
0.63! 0.51] 0.57; 0.42
1.04| 0.83] 0.97| 0.86
1.35| 1.18] 1.32]. 1.00
21.271 19.30/}15.68 9.61 |

Novy. | Dec.
~2.39 2.64
|—2.87 eens
-3.07 |-3.41
/—2.88 -2.74
—2.23 |-2.50
—1.18 |-1.34
—0.59 |—0.64
|—0.48 | —0.26

0.01} 0.18

0.30] 0.54
| 0.59} 0.77
| 0.81] 1.01

1.79 |-2.14

|

Year.

— OL
—3.25
—3.57
—3.55
—3.15
—2.48

—1.63
—0.68
—0.06
0.43
0.86
1.22

Sr1per1A. — NERTCHINSK.

XXIX.

Lat. 51° 18’ N. Long. 117° 20’ E. Gr. — Dove.

Degrees of Reaumur.

1

bo

oe

seman Sh

10

Noon.

Oe OO bo

emt

10
11

EF

Tlour. }

Midn. |

Hess

1.38;
1.61.
1.84)
2.15!
2.40:
aaa

8) 2.94)
3.00,
0) 1.82!

—?2.70|-3.16:
|—3.06 | 3.75,
00/-3.80.
(2.50 -3.47
~1.54|—2.73

—0.71|—-1.61 |

|
|—0.63 |

|

|—0.28
0.02
0.13 |

0.43) 0.86
0.57 1.16

20 —0.12)

54 —2.61

1.92
2.25
2.65
3.02
3.38
3.70|

3.89
2.88
1.36

Sl)

-3.43|
-3.96
—4.23 |
—4.03 |
-3.53 |

—2.75

Feb. | March. April.

Sailor Al

0.01|-0.34!
0.39] 0.24| 0.61| 0.27!

1.06

|

2.53
295
3.36
3.75
4.09
4.15

2.96
1.43
0.19
=a ley
—?2.30

—3.08

—3.70
—4.01
—4.08
—3.84
—3.48

—1:97)|

|—4.10

|—-3.55
i—2.85 |

May. | June.

3.13
3.55
3.98
4.32
4.29
3.27

3.10,
Seal
4.20!
4.78 |
5.04
3.97

2.31)
0.82
-0.53
=1.77
2.73 |
-3.34|

2.03
0.74
—0.45
—1.59
—2.52
= Solid)

—3.82
—4.08 |

—3.62
—3.80
—3.73
=3:59
—3.24
-3.73

=S.-99)l

—3.02 |

—2.27 —2.06

—0.34 5

| 0.27] 0.63] 0.66] 1.19! 1.34

1.72

VAT 2.17

-21.94-17.84 -S.35) 0.04

Mean.

The numbers without sign must be added ;

-0.93 -0.93
| 0.97
1.32
1.92, 2.02
2.63 2.63

7.5

|

Lees,

July. | Aug. |
2.63| 2.51)
3.00| 2.87)
3.34] 3.25
3.64| 3.57
3.86| 3.79
3.17| 3.68
1.99| 2.61
1.01) 1.31
1.28] 0.11
—1.25 | -1.08
—2.13 | -2.10
-2.79 -2.91
—3.28 |-3.49 |
—3.58 |-3.76|
-3.66 3.92
3.48 |-3.79
—3.02 |-3.21
2.38 —2.56
-1.73 | -1.68
—0.82 —0.66
0.37| 0.41
1.24| 1.30
1.78| 1.70
2.29) 2.4)
13.91. 11.91!

Sept. | Oct
2.12| 1.66
2.58] 1.98
2393) ) 2027
3.28] 2.57
3.62| 2.80
3.97) uo:CO
3.63| 3.16
2.07| 2.46
0.66; 0.84
—0.72 | —0.69
—1.99|-1.52
—2.94 | —2.78
—3.71 -3.41
—4.09 |-3.75
—4.20 -3.66
—3.86 | —3.26
—3.34|-2.43
—2.48 | -1.42
—].22 | -0.50
—0.49 | -0.24
0.34) 0.30
0.89) 0.64
1.30] 1.01
1.71, 1.31
6.55 '—1.80

Nov. | Dec. |
0.96; 0.75;
1.22; 0.94)
1.42] 1.16!
1.70| 1.33:
1.91] 1.45)
2.06 me
2.15| 1.76)
2.35| 1.95}
1.61] 1.98!
—0.03) 0.62)
|-1.17 | —0.89
2.12 -1.85)
72.84 '-2.58 |
(-3.09 -2.85.
(2.97 -2.52.
(-2.27 -1.87
-1.34 -0.96 |
-0.87 -0.43
0.10 -0.17)
|-0.17 —0.70)
0.06 0.08,
0.34 0.22)
0.54 0.43)
0.75. 0.56 |

-13.44 -21.36

\}

Year. |

1.96 |
2.31|
2.64
2.96
3.19
3.10

2.63,
1.86
0.71
—0.63
-1.80
—2.65

—3.31)
3.65
—3.66,
Iss
=oe70)
-1.98,

—1.20

Ted
0.29
0.84
1.23]|
1.62

___-

those with the sign — must be subtracted.

40

XXX. 605

Siperta. — Nerrcuinsk. Lat. 51° 18’ N. Long. 119° 21’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Reaumur.

|
April. | May. | June. | July. | Aug. | Sept. | Oct.

—_ |§ —<<— | ——____

0.66) 2.28
0.74) 2.69
0.84) 3.04
1.07} 3.26

2.69] 4.07) 4.29] 3.07} 3.00} 2.16) 2.31) 0.76

3.29] 4.69] 4.71] 3.46] 3.48} 2.96] 2.79] 0.96

1.15} 2.08) 3.16} 3.78! 5.08} 4.90} 3.75) 3.89) 3.27} 3.26) 1.26
|

3.97 4.70| 3.76| 4.04] 3.81) 3.61} 1.66

3.69 3.96] 3.37| 3.72] 3.94] 3.66] 2.06] 1.41] 3.20
2.07| 2.80] 8.28] 2.88) 2.86) 2.67] 2.54) 2.89) 3.15] 3.30) 2.30) 1.75) 2.71
2.06) 2.28} 2.31) 1.63] 1.07] 0.99} 1.37] 1.62) 2.38) 2.47] 2.18) 1.87) 1.85
1.60) 1.28] 0.99] 0.16|—0.78/—0.79| 0.06} 0.15} 0.87] 1.24} 1.58] 1.59] 0.66

0.65|—0.05 |—0.41|—1.26|—2.33|—2.34/—1.19|—1.25!—0.70|—0.23| 0.55] 0.87|—0.64
—0.59|—1.43 |—1.67|—2.42|—3.40|—3.41|—1.98 |—2.38|—1.74/—1.70|—0.69|—0.17|—1.80
—1.79|—2.58 |—2.64|—3.22|—3.98|—3.97 |—2.92|—3.15|—2.99|—2.96|—1.84|—1.23|—2.77
—2.61|—3.29|—3.25|—3.64|—4.19|—4.12 |—3.38|—3.61|—3.49|—3.84|—2.60)—2.01|—3.34

—2.87|—3.49|—3.61|—3.76|—4.22|—4.05|—3.64|—3.53|—3.69 |—4.25|—2.81|—2.30/—3.54
—2.56|—3.27|/—3.74|—3.65|—4.18|—3.92 |—3.72 |—3.88 |—4.00|—4.20|—2.50|—2.08|—3.48
—1.89|—2.76 |—3.65|—3.33 |—4.03 |—3.77|—3-62|—3.75 |—3.54|—3.77 |—1.87|—1.54|—3.13
—1.14|—2.12)—3.31|—2.84|—3.69|—3.54|—3.29|—3.40|—3.24|—3.08 |—1.17|—0.92|—2.65

me OO De

—0.56|—1.45|—2.65|—2.17|—3.04|—3.07|—2.68 |—2.76|—2.68]—2.24|—0.61|—0.47|—2.03 |
—0.23|—0.81|—1.78|—1.39|—2.08|—2.30|—1.82|—1.86|—1.54|—1.36|—0.27|—0.25|—1.31
—0.11|—0.21|—0.77|—0.56|—0.92|—1.23|—0.81|—0.80|—0.386|—0.54|—0.12)—0.23/—0.60
—0.04| 0.31} 0.18] 0:20} 0.26) 0.00} 0.20) 0.24) 0.17] 0.17|—0.25|—0.24] 0.12
'
|
|
|

anrtnaan

0.09} 0.74] 0.90] 0.82] 1.29} 1.21] 1.06] 1.11] 0.97} 0.74) 0.05|—0.17| 0.73
0.31} 1.02) 1.34) 1.29] 2.11) 2.25) 1.51) 1.74) 1.17] 1.18] 0.20] 0.02) 1.18 |
0:57) 1.19] 1.56] 1.71) 2.78) 3.09] 2.23) 2.19) 1.73) 1.54) 0.39) 0.28] 1.61
0.78] 1.29] 1.76) 2.15) 3.41) 3.75) 2.65) 2.57) 1.88] 1.90} 0.58] 0.52) 1.94

0.98! 1.04| 0.77] 0.53] 0.07|—0.12) 0.28) 0.41] 0.76} 0.97] 1.03] 0.82] 0.63
0.78} 0.80) 0.58) 0.18|—0.26|—0.39} 0.13} 0.20) 0.52) 0.71] 0.77) 0.67) 0.39
0.37) 0.34) 0.24|—0.22|/—0.52|—0.56 —0.06|—0.07 0.13} 0.26} 0.30) 0.35} 0.05
—0.14|—0.20|—0.16|—0.57|—0.65|—0.58 | —0.24|—0.32|—0.29|—0.26/—0.25|—0.07|—0.31

—0.14|—0.08 |—0.18|—0 40|—0.61 |—0.57 |—0.43 |—0.38 |—0.22|—0.33|—0.09 |—0.13)—0.30
—0.18|—0.05 —0.09|—0.19|—0.35) -0.42|—0.33|—0.25|—0.23/—0.24|/—0.08 |—0.19|—0.22
—0.06| 0.18] 0.29] 0.17! 0.26] 0.33) 0.11] 0.25] 0.11] 0.09] 0.00'—0.01| 0.14

—0.24;—0.43 |—0.75!|—0.72|—1.13)/—1.18|—1.00|—0.95|—0.80)—0.75|—0.16|—0.19|—0.69
|

—0.41|-0.61 —0.65|—0.07/—1.58 —1.53 /—-1.14/—1.11|—0.66'|—0.89 —0.32 |—0.22|—0.85 |!
—0.94/—1.34|-1.60|—1.85/—2.32 |—2.26 /—1.78|—1.88|—1.69|—1.78|—0.97|—0.71|—1.59
; 70.64 '—1.11 |—1.31|—1.80|—2.50|—2.42 |—1.79|—1 .84|—1.41}—-1.51|—-0.62 —0.36

0.92} 1.00) 0.75] 0.75) 0.89} 0.19} 0.36) 0.52} 0.80] 0.97) 1.01) 0.75 :

|—-0.25|—0.50|—0.72|—1.01|—1.56|—1.47|—1.18/—1.13|-0.81/—0.87|—0.16/—0.11|—0.81
|
9.12.3.9 _|!--0. 48|-1.00|—1.88!—1.75|—2.48 —2.36 —1.83|—1.87|—1.57|-1.48|-0.46|—0.25|—1.41
7. 2.2(9) | -0.08| 0.12) 0.09|—0.09) -0.13/—0.13 —0.06|—-0.01| 0.0 —0.04)—0.05 —0.14|-0.04

| Dail. ext. |-0.40 —0.33 —0.01 real 0.43 0.39! 0.02 0.08 —0.03/—0.30 —0.26/—0.22'—0.14

The numbers without sign must be added ; those with the sign — must be subtracted.

F 4]

606

SIBERIA. — BARNAUL.

XXXII.
Lat. 53° 20’'N. Long. 83° 27’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Fahrenheit.

Oct.

3.06
3.78
4.52
5.15

5.47
5.29
4.46
2.97

0.99
oe
—3 31
—5.00

—6.05
—6.39
—6.05
— 522

—4.05
—2.75
—1.49
—0.36

0.54
1.28
1 87
2.45

1.28
1.49
1.31
0.77
0.05

—0.47
—0.50

0.07
—1.28

—0197
lerdal
—1.54
—0.80

Nov. | Dec.

2.48
2.97
3.35
3.71

1.73
0.11
—1.76
—3.42

—4.59
—4.48
oats
—2.68

—1.60
—0.83
—0.43
—0.23

—2.57
—1.55
—0.86
—0.41

0.00} 0.00
0.38

0.92

0.52
1.15

1.85} 1.44

1.31
1.55
1.37
0.83
0.07

099
128
1.24
0.86
0.25

—0.59
—0.65
—0.34
—1.04

—0.50
—0.635
—0.43

0 83

—0.88
—1.29
=1'22
-0.81

—0.75
—0.89
—0.85
—0.70

—1.96)-1.37

3|-0.45|—0.38

—0 79 a

Mean,

495
5.76
6.41
6.66

5.65
3.94
1.96

—0.25
—2.48
—4.43
—6.01

eal
TAT
—enid)
—6.46

--5.15
—3.74
—1.82
—0:25

1.13
22
3.22
4.10

0.97
1.06
0.86
0.43
—0.11

—-0.81
—0.70

0.16
-1.85

=1.77
—2 76
—2.56
= ley

-3.11
—0.34

—0.41

Hours. Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept.
Morn. 1 2.54) 1.85) 4.70} 5.49) 8.82] 7.83} 8.37] 7.11] 5.45
2 2.81} 2.14) 5.47] 6.30) 10.19] 8.87] 9.77) 8.35] 6.50
3 2.70} 2.48; 6.28] 7.07) 10.96] 9.59/10.69| 9.52] 7.65
4 2.39) 2.81) 7.02} 7.45] 10.76) 9.14] 10.67/ 10.15] 8.48
5 2.07| 3.13] 7.43} 7.09} 9.32] 7.58] 9.50) 9.77] 8.60
6 1.96} 3.33} 9.38) 5.87) 6.68) 5.45] 7.18] 8.12] 5.58
7 2.00) 3.20) 5.90} 3.87] 3.38] 2.50} 4.05) 5.36] 2.70

8 1.98} 2.59} 3.71} 1.37|/—0.11/—0.18} 0.70) 1.96
9 1.53] 1.3 0.86 |—1.28|—3.02|—2.48 |—2.32|}—1.44/-—0.56
10 0.45 |—0.36|—2.18|—3.74| 5.06 |—4.61|—4.68 |—4 32]- 3 67
11 ||—1.22|—2.30|—4.91/—5.78|—6.35 |—5.99 |—6.35|—6.48}—6.2]
Noon. - -|/—3.08|—4 03|—6.89 |—7.34|—7.20|—7.31|—-7.52|—7.97|/—7.99
1 ||—4.59|/—5.13|—7 97|—8.35|/—8.03|—8.39|—8 42|—-8.96|—8.96
2 ||—5.27|—5.38|—8.21|—8.71|—8.78|—8.78 |—9.16|-—9.63|—9.23
3 ||—4.93| —4.77|—7.76 |-8.39|—9.41|—8 91|—9.56|—9.88|—-8.82
4 |\-3.78|/—3.56|—6.84)|—7.34|—9.50|—8.01|—9.36]—9.50|—7.81
5 ||—2.25|—2.14|—5.65|—5.58) —8.66 |—6.32|—8.35|/—-8.28|-6.26
6 ||—0.90|—0.83 |—6.46|—3.35|/—6.82/—4.39|—6.48 |—-6.19|—4.25
7 0.02) 0.09 |—2.61|—1.04|—4.16/—1.94|—4.01|-3.51/—2 07
8 0.47) 0.63|—0.97| 1.04/-1.31} 0.11/—1.31/—0.68] 0.02
9 0.70} 0.92} 0.63) 2.61] 1.46] 1.80} 1.24] 1.80] 1.76
10 0.95} 1.10) 2.00} 3.62} 3.78] 3.49] 3.38] 3.67] 2.99
11 1.42] 1.28} 3.13] 4.25) 5.69) 4.75] 5.20) 4.97] 3.85
Midn. . .|j 2.03) 1.55] 3.98] 4.82) 7.36] 6.26] 6.82] 6.03] 4.59
6. 6 0.54) 1.24) 1.46) 1.26/-0.07| 0.54] 0.34] 0.97] 1.69
lis hd 1.01} 1.64] 1.64) 1.42/—0.41] 0.27) 0.02] 0.92] 1.76
8. 8 1.24) 1.62) 1.37) 1.22|/—-0.72|/—0.05/—0.29| 0.65] 1.35
9589) 1.10) 1.15} 0.74 0.68 —0.79 —0.34|—0.54| 0.18] 0.59
10.10 0.70| 0.38|—0.09 —0.07 —0.63|—0.56|—0.65|—-0.34|—0.34
7 2. 9 ||—0.86|—0.43/—0.56 —0.74 -1.31 —1.49 |—1.28 |—0.83 |—0.63
6. 2. 8 ||—0.95|—-0.47| 0.07)—0.61|/—1.13)—1.08|—1.10|—0.72|—0.52
6. 2.10 ||—0.79|—0.32) 1.06} 0.27} 0.56) 005] 0.47) 0.72] 0.47
6. 2. 6 |\—-1.10|—0.97|/—1.76|—2.07 —2.97|/—2.57|—2.81 |—2.57|-1.94
7 2 —1.64|/—1.09 —1.16 —2.42 —2.70 —3.14|—2.56|—2.14|—1.83
8-2 —1.65|—1.40)—2 25|-3.67 —4.45|—4.48 /—4.23 |-3.84/-3.27
Scat —1.31|-1.27 —2.13)-3.49 —4.07|—4.29 |—3.86|—3.50|—3.13
end —1.30/—0.97 —1.04|-2.24 —2 33/—2.95|/—2.19 —1.80|—1.69
9.12.3.9 ||-1.45 -1.62|—-3.29|-3.60 —4.55|—4.23|—4.55|—4.37|—3 92
7 2.2(9) —0.47 —0.09 —0.27| 0.09|—0.63|—0.68!—0.65 —0.18/—0.05
Dail. ext.||—1.24 —1.04| 0.59/-0.63] 0.74] 0.34] 0.56] 0.14/—0 32

| |
The numbers without sign must be added; those with the sign — must be subtracted
F 42

SIBERIA. — BARNAUL.

XXXII.

607

Lat. 53° 20'N. Long. 83° 27’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

owt DQ o

ocean an

—
a o

2
2
1
1
9.12.3.9

7. 2.2(9)

Dail. ext.

SIE ae
wmuonwrmwm SEANAD
mnmne 7

no °F

—1.00
—0.40
0.01
0.21

—0.95
—0.37
0.04
0.28

0.31
0.42
0.63
0.90

0.41
0.49
0.57
0.69

0.24
0.45
0.55
0.49
0.31

0.55
0.73
0.72
0.51
0.17

—0.38
—0.42
—0.35
—0.62

—O219
—0.21
—0.14
—0.43

—0.73
—0.73
—0.58
—0.58

—0.49
—0.62
Ola
—0.43

—0.72
—0.04

—0.64
—0.21

—0.55'—0.46

March.

2.09
2.43
2.79
3-12

3.30
4.17
2.62
1.65

0.38
—0.97
—2.18
—3.06

—3.54
—3.65
—3.45
—3.04

—2.51
—2.87
—1.16
—0.43

0.28
0.89
1.39
1.77

0.65
0.73
0.61
0.33
—0.04

—0.25
0.03
0.47

—0.78

—0.52
—1.00
E-O.00
—0.46

—1.46
—0.12

0.26 —0.28; 0.33,

April.

2.44
2.80
3.14
3.31

3.15
2.61
1.72
0.61

—0.57
—1.66
aD
—3.26

—3.71
—3.87
—3.73
—3.26

—2.48
—1.49
—0.46

0.46

1.16
1.61
1.89
2.14

0.56
0.63
0.54
0.30
—0.03

—0:33
eel

0.12
—0.92

—1.80
—1.63
—1.55
—1.00

—1.60
0.04

Degrees of Reaumur.

June. | July.

May.

3.92
4.53
4.87
4.78

3.48
3.94
4.26
4.06

3.72
4.34
4.73
4.74

4.37
2.42
1.11
—0.08

4.22
3.19
1.80
0.31

4.14
2.97
1.50
—0.05

—1.10)—1.03
—2.05|—2.08
—2.66|—2.82
—3.25/—3.34

—1.34
—2.25
—2.82
—3.20

—3.57|—3.73|—3.74
—3.90|—3.90|—4.07
—4.18|—3.96|—4.25
—4.22|—3.56|—4.16

—2.81
tO
—0.86

0.05

—3.71
—2.88
—1.78
—0.58

—3.85
—3.03
—1.85
—0.58

0.80
1.55
2.11
2.78

0.55
1.50
2.31
3.03

0.65
1.68
2.53
3.27

—0.03} 0.24) 0.15
—0.18} 0.12} 0.01
—0.32|/—0.02|—0.13
—0.35|—0.15|—0.24

—0.28|—0.25|—0.29

—0.58
0.50

0.25
—1.32

—1.96|—0.57
—v.43) 0.49

0.02} 0.21
—1.14/-1.25

—1.14
—1.88
1.72
—0:97

—1.40
Sale O9)
Seno
—1.31

—1.20
—1.98
—1.81
—1.04

—2.02
—0.29

—2.02
—0.28

—1.88
—0.30

0.15! 0.25

Aug.

3.16
3.71
4.23
4.51

4.34
3.61
2.38
0.87

—0.64
—1.92
—2.88
—3.54

—3.98
—4.28
—4.39
—4.22

—3.68
aD
—1.56
—0.30

0.80
1.63
2.21
2.68

0.43
0.41
0.29
0.08
—0.15

—0.37
—0.32

0.32
—1.14
—0.95
ier

—1.56
—0.80

—1.94
—0.08

0.06

Sept. | Oct. | Nov.

2.42
2.89
3.40
3.77

1.36
1.68
2.01
2.29

1.10
1.32
1.49
1.65

2.43
2.35
1.98
1.32

1.78
1.85
1.76
1.40

3.82
3.40
2.48
1.20

0.44) 0.73
—0.54/—0.18
—1.47|—1.16
—2.22|—1.99

—0.25
—1.63
—2.76
—3.55

—2.69|—2.48
—2.84|/—2.54
—2.69)|—2.23
=2.32/-1.71

—3.98
—4.10
=—3.92
—3.47

—1.80)—1.14
—1.22|—0.69
—0.66)—0.38
—0.16)—0.18

—2.78
Stee
—0.92

0.01

0.24
0.57
0.83
1.09

0.00
0.23
0.51
0.82

0.78
1.33
1.71
2.04

0.57
0.66
0.58
0.34
0.02

0.58
0.69
0.61
0.37
0.03

0.75
0.78
0.60
0.26
—0.15

—0.21
—0.22

0.03
Ons

—0.28
Al le28}

0.21
—0.86

—0.26
—0.29
—0.15
—0.46

—0.43)
—0.76
—0.69
—0.36

—0.81
—1.45
—1-39
=—0.75

—0.39
—0.57
—0.54
—0.36

—0.87
—0.20

alse.
—0.02

—1.06
—0.10

—0.14/—0.21/—0.35

The numbers without sign must be added; those with the sign — must be subtracted.

13

'—0.33

Dec. | Mean.

2.20
2.56
2.85
2.96

0.81
0.89
0.92
0.97

1.09
1.24
1.33
1.20

2.83
2.51
1.75
0.87

0.77/—0.11
0.05|/—1.10
—0.78|—1.97
—1.52)|—2.67

—1.95|--3.14
—1.99|—3.32
—1.68|—3.23
—1.19|—2.87

—0.71|—2.29
—0.37/—1.66
—0.19/—0.81
—0.10|—0.11

0.00
0.17
0.41
0.64

0.50
1.01
1.43
1.82

0.44
0.57
0.55
0.38
0.11

0.43
0.47
0.38
0.19

—0.05

—0.22
—0.28
(eo)
—0.37

—0.36
—0.31

0.07
—0.82

—0.33
—0.40
—0.38
—0.31

(edo
—1.23
—1.14
—0.70

—0.61
—0.17

608

XXXIII.
Siperra. — Barnaut. Lat. 53° 20’N. Long. 83° 27’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Doves.

Degrees of Reaumur.

|| Hour. | Jan. Feb. March.) April. | May. | June. | July. | Aug. | Sept. | Oct. Nov. Dec. Year.
| Midn. || 0.99 1.98 | 2.43| 2.65] 3.70] 3.75] 3.48] 3.10) 2.80} 1.99) 1.06] 0.77) 2:39
1 1.15) 2.21) 2.77 3.03 4.11] 4.30). 4.07]. 3.50) 3.20) 2.24) 1.22 0.86 | sihe
2 1.26| 2.36) $.13| 3.24] 4.47| 4.83) 4.49| 3.90) 3.63] 2.50] 1.39) 0.95)' 3.00
3 U4] 2:47) 8.34), 3.49) 4.72) 4.95) 4:77) 4.29) 3.92] 2:69) 1-46). 1-01) 3.21
| 4 || 1.56 2.56| 3.61] 3.59). 4.20] 4.41| 4.40] 4.23] 4.11] 2.89] 1.51] 1.07) 3.18
5 | 1.55] 2.68] 3.70| 2.78] 2.85] 3.12] 3.34] 3.60| 3.90] 2.91] 1.57) 1.10] 2.76
6 1.61] 2.69) 2.90} 1.58] 1.44) 1.75] 1.88] 2.29) 3.06| 2.68) 1.59) 1.09] 2.05
i 1.53| 2.30] 1.63|} 0.46| 0.28] 0.49] 0.50] 0.85| 1.54] 1.84] 1.50] 1.18!! 1.17
8 0.94) 1.15!) 0.13)—0.69 —0.80|—0.65 |—0.54 —0.51/—0.08| 0.87| 0.95} 0.93. 0.14
9 0.27 | —0.47 |—1.335 | —1.80 —1.94/—1.78 |—1.81 |—1.79 | —1.62|—0.73 |—0.03] 0.11, —1.08
10. =||—0.79|—1.90 |—2.36 | —2.68 |—2.71 | —2.75 —2.70 | —2.80 | 2.84] —1.96 | 1.12 —0.83 | —2.12
11 (1.69 —2.95 |—3.31|—3.27 |—3.39|—3.39 | -3.44 | —3.41 |—3.75 | -2.81 | —1.93 | —1.62 | —2.91
Noon |—2.35 —3.89 —3.78 —3.66 —3.73 —3.98 |—3.90 }|—3.81 | —4.19 | —3.48 | -2.42 —2.04 —3.44
1 —2.61/—1.25|—4.11 |—3.68 |—4.04 —4.19 —4.09|—4.11 |—4.41 | —3.72 | —2.57 | -—2.12) —3.66
2 \-2.39 —4.23 |—4.07 —3.65 —4.13 |—4.34 —4.21 |—4.10 | —4.34 | -3.64 —2.39 —1.70| —3.60
3 ||—1.88 | —3.62 |—3.69 | —3.39 |—4.09 —4.19 | —3.89 |-3.91 —4.11 | —3.17 | —1.66 | —1.09 | —3.22
4 —1.19 | —2.30 |—2.67 | —2.62 |—3.51 |—3.57 |—-3.65 | —3.68 |—3.21 |-2.53 '—1.05 |—0.76| —2.56
5 —0.81|—1.30|—1.69 | -1.82 |—3.09 |—3.04 | —3.07 | —2.'78 | —2.29 | —1.49 |-0.71 |—0.53| —1.89
6 —0.41 | —0.56 —0.84| —0.62 —1.92 —2.19 |—2.09 | -1.54 | —1.05 | -—0.72 | —0.33 | —0.28 | —1.05
of (0.20) 0.09; 0.35| 0.27|—0.46 | —0.84 |—0.69 | —0.20 | —0.17 —0.08 —0.03 —0.02 | —0.17
8 || 0.12] 0.69| 0.39) 0.99] 0.77) 0.51] 0.52; 0.67] 0.60) 0.31] 0.23) 0.19], 0.50
9 | 0.32; 1.08; 0.88) 1.50) 1.64) 1.48] 1.42} 1.46) 1.26) 0.82) 0.42; 0.39], 1.06
10 0.73| 1.47| 1.46] 2.02] 2.42) 2.81] 2.22] 2.04] 1.85] 1.29] 0.58] 0.58] 1.58
11 || 0.78] 1.76] 1.92). 2.35) 3.11] 3.05] 2.88] 2.58) 2.36] 1.68] 0.83] 0-75): 2.00
| | _—_-—
Mean. |-14.71/-18.47|—5.47| 1.77 | 7.78 | 13.62 | 14.98 | 12.76 | 7.53 | 1.58 |—8.36 -13.07), 4.94
The numbers without sign must be added ; those with the sign must be subtracted.
F 44

609

HOURLY CORRECTIONS

PERLODLG, VARLATIONS.

EUROPE.

Corrections to be applied to the Means of the Hours of Observation to obtain the true

Iraty. — Rome.

XXXIV.
Lat. 41° 54’N. Long. 12° 25’ E. Greenw.

611

Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

TR Cee ae
mt et bo bo

9.12.3.9
7. 2.2(9)

Dail. ext.

Jan.

Feb. |March.} April.

Degrees of Reaumur.

May.

June. | July.

Aug.

Sept.

0.66
0.90
0.89
0.65
0.24

—0.15
—0 21
—0.10
—0.49

—0.52}

—0.69
—0.65
—6.48

—0.82
0.04

—0.51 -0.37)

0.74
1.00
0.99
0.72
0.26

—0.08

—0.16|

0.06
—0.59

—0.46

—9°76
—0.67
—0.37

;—1-02

0.11

0.78
0.90
0.77
0.44
-0.01

—0.01
—0.01

0.26
—0.49

—0.40
—0.88
—0.87
—0.39

lots
0.19

0.76
0.86
0.72
0.40
—0.04

0.57
0.68
0.61
0.37
0.04

—0.03
—0.02|} 0.01
0.32) 0.50
—0.58|—0.73

0.03

—0.52|—0.56
—1.07/—1.19
—1.06/—1.15
=0:51|/—0.52

—1.32/—1 39

0.21) 0.33

0.28
0.48
0.55
0.48
0.27

0.57
0.72
0.67
0.45
0.10

0.05
-0.07| 0.04
0.65| 0.72
—1.04/—0.87

0.13

—0.66|/—0.47
—1.36/—1.25
=1.21/-1.17
—0.51|/—0.40

—1.53|/—1.60
0.40, 0.43

2.20
2.49
3.00
3.54

3.79
3.53
2.62
1.22

—0.35
—1.78
—2.84
—3.49

—3.81
—3.92
—3.87
—3.62

Sa
—2.18
—1.01

0.21

1.22
1.86
2-11
2.14

0.68
0.80
0.71
0.43
0.04

—0.03
—0.06

0.49
—0.86

—0.65
—1.35
—1.30
—0.60

—1.62
0.29

—0.12'-0.11|-0.01/—0.17) 0.09|-0.07

1.63
ror
2.38
2.91

3-25
3.17
2.58
1.51

0.15
—1.23
—2.41
—3.24

—3.70
—3.80
—3.59
—3.11

—2.38
—1.48
—0:51

0.38

1.05
1.43
1.54
1.55

0.85
1.03
0.95
0.60
0.10

—0.06
—0.08

0.27
—0.70

-0.61
—1.15
—1.10
—0 56

—1.41
0.22

—0.28

1.50
1.75
2.12
2.58

1.15
1.29
1.53
1.87

2.96
3.10
2.82
2.05

2.22
2.42
2.33
1.82

0.86} 0.93
—0.58|—0.22
—2.00/—1.41

—3.14|—2.39

—3.82/—3.00
—3.99|—3.16
—3.69|—2.93
—3.04/—2.41

—2.21|—-1.76
—1.32)/— ..09
—0.50|—0.48

0.19} 0.05

0.46
0.76
0.95
1.06

0.71
1.05
1.24
1.36

0.89
1.16
1.12
0.78
0.23

0.67
0.92
0.94
0.70
0.27

—0.15|—0.12
—0.23|—0.23

0.05; 0.01
—0.74|/-0.61

—0.59
—).97
—0.89
—9.50

—0.42
—0.67
\—0.59
—0.34

—1.32
0.06

—0.98
0.02

—0.45

The numbers without sign must be added ; those with the sign — must be subtracted.

47

0.93
1.02
11S,
1.43

1.70
1.87
1.83
1.47

0.78
—0.15
-1.14
oo

—2 52
—2.66
—2.44
—1.95

—1.35
—0.75
—0.24

0.17

0.46
0.66
0.79
0.86

0.56
0.50
0.82
0.62
0.26

—0.12
i—0.21
—0.04
—0.51

—0.42

|~0.53
-0.55

'—0.80
0.02

—0.60)

2.90
2.86
2.34
1.40

0 20
—1.03
—2.09
—2.84

—3.26
—3.39
—3.26
—2.89

=2.30
—1.52
—0.64

0.23

0.91
1.33
1.49
1.51

0.67
0.85
0.81

0.55

0.15
\

—0.05
—0.10
10.27
—0. 68

—0.52
—1.00

0.93

—0.46

—1.25
0.19

—0.37'—0.40 —0.25

}

|

612 ; XXXV.
Iraty.— Papua. Lat. 45° 24’N. Long. 11° 52’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

[ July. | -Aug. Oct.

Morn. 1 0.58} 0.57) 0.89) 1.23] 2.43] 2.21} 2.86] 2

2 0.58} 081} 1.20) 1.49) 2.70) 2.40) 3.20) 2.
3 0.76) 0-97} 1.42} 166} 3.00} 2.68} 3.53} 3.05] 2.10} 1.20] 1.26] 0.98] 1.88
4 0.79} 1.13} 1.68) 1.97] 3.14] 2.71] 3.78) 3.44] 2.34] 1.39} 1.35) 1.05) 2.06

-27; 1.59} 0.86} 1.04] 0.83) 1.45
70| 1.85) 1.03] 1.16] 0.96) 1.67

44) 2.66) 1.58 1.42] 1.12} 2.12
3} 2.54| 154] 1.49) 1.16) 1.82

1.06} 1.31] 189] 2.26) 2.97; 2.39) 3.34) 3

1.13) 1.46} 2.06) 2.22) 1.96] 1.22) 2.07] 2.9

1.25} 1.58} 1.86] 1.82] 0.66) 0.08] 0.56] 1.82} 1.78} 1.37] 1.58] 1.23] 1.30
0.5

1.07] 1.42} 0.66] 1.03/—0.23|—0.65|—0.25| 0.58] 0.79} 0.81] 0.97} 1.00] 0.60

@mat qa ow

10 0.10)/—0.08|—0.83|—0.42|—1.70|—1.66|/—2 29|—1.90/—1.03/—0.51|—0.81|—0.26|—0.95 |
0|—2.23|—2.77|—2.38/—-1.56/—0.99|—1.51|—1.05|—1.48 |
4|—2.52|—3.16|—2.97|—2.14/—1.41 |—2.02/—1.50/—1.94

11 ||—0.58|—0.62)—0.87|—0.85|—2.:
Noon. . . |/—0.98/—1.24|—1.32|—1.27|—2.

—1.38|}—1.45|/—1.54|—1.68|—2.88|—2.61 |—3.53 |—3.34|—2.54|-1.74|—2.42|}—1.90| —2.25
—1.51|—1.62|—1.74|—1.92|—2.94|—2.62|—3.74|-3.73|}—2.84|—2.01|—2.55|/—2.06|—2.44
.45|—1.65)/—1.90}—2.14|—2.94|—2.59|—3.54|—3.81|—2.87 |—2.04 |—2.22/—1.68/—2.40
—1.18|/—1.34/—1.71|—2.10|/—2.67|/—2.20/—2.82|—3.23|—2.38|—1.94/—1.53 |—1.14|—2.02

mewn
|
_—

—0.87|—0.98 /—1.39|—1.98|—2.08]—1.60|—2.44|/—2.49|—1.60/—1.05|—0.73 |—0.74|—1.50
—0.59|/—0.79|—1.02|—1.51|—1.20/—1.00|—1.41|—1.34|/—0.83/—0.54|—0.15|—0.33|—0.89
—0.32)/—0.62/—0.73|—1.12}—0.26|—0.12|—0.46|—0.32|—0.18)/—0.14| 0.12|—0.15|—0.36
—0.07|—0.42|—0.43|—0.47|—0.14| 0.38] 1.01} 0.50/—0.10|} 0.05} 0.33] 0.04] 0.06

9 0.70} 0.82) 0.61} 0.18|—1.07|—1.24/—1 63|—1.65|—0.58} 0.18} 0.02} 0.33/—0.28

natn o

0.05|—0.14|—0.10/—0.11} 1.11) 1.38} 1.54} 1.01] 0.23) 0.26} 0.49] 0.26] 0.50
0.18} 0.09) 0.24] 0.27] 1.44] 1.72] 1.67} 1.36] 0.58] 0.52] 0.72) 0.46} 0.77
0.29} 0.31) 0.48] 0.60} 1.75] 1.86] 2.14] 1.78] 0.84] 0.68] 0.86] 0.59) 1.02
0.37| 0.49] 0.72] 0.85] 2.02] 2.10] 2.43] 2.23] 1.36] 0.78] 0.94] 0.70] 1.25

0.27) 0.34] 0.52} 0.36] 0.38] 0.11] 0.33] 0.80] 0.86] 050] 0.67) 0.42] 0.46
0.47| 0.48] 0.57} 0.35] 0.20/—0.02] 0.05) 0.75] 0.80) 0.62} 0.85] 0.54] 0.47
0.50} 0.50} 0.12} 0.28/—0.19/—0.14] 0.38) 0.54] 0.35) 0.43] 0.65} 0.52] 0.33
0.38) 0.34) 0.26) 0.04) 0.02} 0.07|=—0.05|/—0.32/—0.18] 0.22} 0.26] 0.30) 0.11
0.14) 0.01|—0.30/-0.08|—0.13} 0.03)—0.31|—0.27/—0.23) 0.01|—0.05} 0.10/—0.09

-0.07 -0.06) 0.01/—0.07|—0.39 |—0.39|—0.55/—0.30/—0.28 /—0.13 /—0.16/—0.19|—0.21
-0.15 -0.19 —0.04|—0.06|—0.37|—0.34|/—0.22 0.10 —0.13|—0.14|/—0.24/-0.29|—0.19

|—0.07 —0.02) 0.19} 0.19] 0.15} 0.11/—0.00} 0.19] 0.09) 0.02|—0.11/—0.15| 0.05
—0.32 —0.32 —0.23|—0.40|—0.73 /—0.80/—1.03|—0.71|—0.38|—0.34|—0.40|—0.41|—0.51

—0.13)—0.02} 0.06)—0.05|—1.14/—1.27|—1.59|—0 96|—0.53|—0.32|—0 49 —0.42|—0.57
—0.22)—0.10 —0.54|—0.45|—1.59 /—1.64|—2.00|—1.58|—1.03)/—0.60|—0.79 |—0.53 |—0.92
—0.16)/—0.02 |—0. !4|—0.33]—1.56|—1.63/—1.89|—1.38|—0.88|—0.47/—0.73 |—0.45 |—0.83
—0 07} 0.07} 0.16} 0.07|/—1.11|/—1.27/—1.49|—0.76|—0.38|—0.19|—0.42/—0.34|—0.48

—0.42|—0.55|/—0.68|/—0.84/—1.41 |—1.24|—1.70|-1.86|—1 34|—0.75|—0.93|—0.65|—1.03
—0.04|—0.08|—0.02;—0.08|—0.02} 0.06/—0.03) 0.(3/—0.15|—0.03|)—0.00|—0.08|—0.04 !

—0.'3}-0.04| 0.08] 0.06; 0.10} 0.05] 0.02/—0.19'—0.11'—0.23|—0.49 ~0.42|-0.16

The numbers without sign must be added; those with the sign — must be subtracted.

F 48

SwiTZERLAND. — GENEVA.

XXXVI.
Lat. 46° 12’N. Long. 6° 9’ E. Greenw.

61

3

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

! Hour. || Jan. | Feb. March. | April. | May. | June. | July. | Aug. | Sept. | Oct. Noy. Dec. | Year.
Midn. || 0.50| 0.68) 1.38] 1.68] 2.16] 2.77] 2.54] 2.38) 1.86] 1.44] 0.80| 0.48], 1.56
| -1 || 0.62] 0.83] 1.88] 2.14] 2.72] 3.32] 3.19] 8.08] 2.41] 1.71] 0-97| 0.54] 1.95
2 0.74| 1.01| 2.34] 2.53] 3.16] 3.68] 3.70] 3.68] 2.93) 1.95/ 1.14] 0.61]| 2.29
3 || 0.83] 1.22] 2.70| 2.76| 3.40| 3.74) 3.89] 4.03] 3.34] 2.14] 1.30| 0.70] 2.50
4 || 0.92| 1.46] 2.89] 2.78) 3.34] 3.50| 3.80] 4.00| 3.49] 2.22] 1.43] 0.81|| 2.55
5 0.98| 1.66] 2.83] 2.54] 2.93] 2.88| 3.26| 3.52] 3.30} 2.14] 1.51] 0.91] 2.37
|} |
6 || 1.02] 1.75| 2.49] 2.03] 2.22} 2.03) 2.39] 2.65| 2.72) 1.85] 1.48/ 0.97] 1.97
7 || 0.97|. 1.66] 1.90] 1.83] 1.28] 1.05] 1.38] 1.54] 1.84] 1.34] 1.26] 0.92] 1.37
8 || 0.78] 1.33] 1.09] 0.50| 0.27) 0.08} 0.26| 0.37] 0.78] 0.65] 0.84] 0.70|| 0.64
9 | 0.46) 0.74) 0.17) -0.34 —0.69 |—0.82 —0.71 | —0.70|—0.30)—0.15) 0.23| 0.34 —0.16
10 | —0.02|—0.01 |—0.77 | -1.10 —1.51)—1.57 —1.53 —1.58 |—1.26 —0.98 —0.47 |-0.16 —0.91)
11 | -0.57|—0.80 | —1.61|—1.75 —2.17|—2.18 |—2.24 | —2.29 | —2.06 | -1.70 a leet ete
Noon. ||—1.06|—1.49 |-2.26 | -2.23 |—2.66 | 2.70 | 2.74 | —2.85 | -2.66 | 2.22 |—1:66 | —1.10| —2.14
| |
1 | —1.40|—1.98 |—2.70 | -2.55 —2.98 | -3.10 |—3.18 | —3.29 | —3.08 | —-2.53 | -1.94 |—1.37, -2.51
2 | —1.50|—2.18 |—2.87 | —2.67 |—3.12 | —3.35 |—3.48 | —3.58 | 3.29 | —2.58 | -1.94 | —1.41| —2.66
3 «| —1.41|—2.10|—2.81 | —2.61 |—3.07 | —3.42 |—3.51 | —3.65 | —3.28 | —2.41 —1.74 |-1.26| —2.61
4 | -1.14)—1.82|—2.54|-2.37|-2.80 | —3.25 |-3.37 |-3.43 | 3.04 | -2.06 |—1.38 0.97 | —2.35)|
5 | —0.79 —1.37 | —2.10 |—1.97 | 2.82) —2.78 | —2.90 |—2.92) —2.57 | —1.59 |—0.99 —0.64 -1.91
6 | —0.46 |—0.94 |—1.59|—1.46 —1.70 | —2.11 |—2.22 —2.18 | —1.91 | —1.06 |—0.62 | —0.32 —1.38
7 | —0.20 —0.51|—1.06 | —0.90 —1.00 —1.29 —1.40 —1.31/—1.16 —0.53 —0.30 —0.07 —0.81)|
8 | —0.01/—0.14 —0.54)—0.34 -0.29 —0.42 —0.49 —0.46 —0.42 —0.02 0.03, 0.11 —0.26
9 | 0.12) 0.14) 0.05) 0.20) 0.38), 0.47) 0.34) 0.32) 0.26) 0.42) 0.20) 0.24) 0.26,
10 || 0.25) 0.37) 0.42} 0.70} 0.91) 1.30) 1-10) 1.02) 0.83) 0.82) oa 0.34 0.71||
11 0.37| 0.54] 0.90| 1.20) 1.51] 2.07| 1.87| 1.70] 1.85] 1.15| 0.62, 0.41 1.14||
‘Mean |—0.53| 1.24| 3.41| 6.77 |10.37|13.31 | 14.30 |13.58/11.46| 7.48 | 3.76 | 0.58 |
XXXVII.
SwitzeErLaAnp.— Geneva. Lat. 46° 12’ N. Long. 6° 9' E. Gr.— Dove.
Degrees of Reaumur.
| Hour. |} Jan Feb. | March. | April. | May. | June. July. | Aug. | Sept. | Oct. Nov Dec. | Year. |}
Hew iireaiam eee Le SoA Tho ole eo Sl or a Pea iT reel oT | |
Midn. | 0.45) 0.69, 1.26] 1.44] 1.54| 1.98] 2.12] 1.63] 1.44| 0.94) 0.50} 0.59|/ 1.21
2 | 0.70) 0.96 2.21 2.62) 2.60) 3.20 3.18 2.83 2.72 1.46 0.73 | 0.66 1.99
| 4 | 1.01) 1.33, 2.91) 3.36 3.11) 3.55 3.82} 3.51| 3.26] 1.90! 1.02] 0.80|| 2.46
6 || 1.19] 1.49] 2.70) 2.87| 2.26|. 2.88) 2.47| 2.82| 2.79 1.74) 1.13] 0.97||: 2.07
8 || 1.22) 1.22] 1.42] 0.74/ 0.27] 0.13] 0.22] 0.49] 0.72] 0.94! 0.90] 0.95||' 0.77||
| 10 ||-0.02 | 0.25 —0.68 |—1.70 —1.30 | —1.34]—1.25 | —1.01 —1.10 —0.73 eavicer —0.73||
| | |
| Noon. | —0.13/—1.30 -1.97 —2.14 —2.42 —2.54|-2.50 —-2.34 ~2.38|—1.86 —1.18 —1.22) —1.91)|
2 |-1.69'-1.70 -2.82 —2.94 -2.97|-3.09 /-3.11 | -3.17 -3.03 -2.35 -1.55 —1.46| —2.49
4 |-1.30 -1.61 —2.70 —2.94 —2.46 | —2.87 —2.89 —3.04 —2.86 —1.53 |—1.19 —1.05 | —2.20)|
6 ||—0.54|—0.90 | —1.79 |—2.06 —1.40 | —1.89 | —2.24 —2.04 | —1.74 | —0.88 —0.45 —0.43| —1.36
8 | -0.09 —0.21 —0.89 —0.70 —0.10 —0.25 —0.58 -0.88 -0.88/—0.08, 0.03, 0.10) —0.29)|
10 | 0.20, 0.28 0.34 0.40 0.86) 0.78) 0.78) 0.69) 0.57) 0.47) 0.29} 0.18)| 0.49
aes meena Ga ase As: EAA I
| Mean | 1.20) 0.47 2.28 6.81 9.48 | 12.82/ 14.43 13.74 10.66. 7.73 | 3.30.) 0.12 ||
The numbers without sign must be added ; those with the sign — must be subtracted.
F 49

|

1}

\|
1
|

)

|
|
|
|
|
|

614

SwITZERLAND. — St. BERNARD.

XXXVIII.

Lat. 45° 52’ N. Long. 9° 22’ E. Gr.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Degrees of Reaumur.

|| Hour. | Jan. | Feb. | March. | April. | May. | June. | July. | Aug. | Sept. | Oct. Noy. Dec. || Year. |
Midn. 0.48; 0.81} 1.34] 1.96] 2.10] 1.72] 1.62} 1.30} 0.76] 1.02] 0.59] 0.31]) 1.17 |
| 1 0.63) 0.91} 1.58] 2.22) 2.45; 1.99] 1.93) 1.53] 0.97| 1.17} 0.66} 0.33]] 1.36
| 2 || 0.81] 1.09] 1.82] 2.40] 2.73| 2.15| 2:14] 1.82] 1.17] 1.30] 0.78] 0.40] 1.55
| 3 0.99) 1.26] 1.98] 2:46] 2.81) 2.24] 2.24] 1.94] 1.84] 1.36] 0.89} 0.50] 1.67
4 1.08] 1.38] 2.02] 2.34} 2.67/ 2.14] 2.17} 1.91] 1.41] 1.34] 0.98] 0.52]| 1.66
| 5 1.08; 1.34) 1.84] 2.00) 2.28] 1.88] 1.90] 1.70] 1.85] 1.19] 0.98] 0.66)} 1.52
|
6 O'91) 1.14; 1.42) 1.45) 1.72) 1.42) 1.44) 1.84) 1:14} 0:92) 0:86) 0.62) 1-20
7 0.60; 0.74| 0.79} 0.70) 0.81] 0.81] 0.82| 0.76| 0.77] 0.83] 0.61] 0.50) 0.73)
8 || 0.17| 0.18] 0.00|—0.16/—0.08] 0.09] 0.10] 0.12] 0.29] 0.06] 0.26] 0.26] 0.11)
9 ||—0.31|—0.48|—0.85 |—1.06 |—1.10|—0.66 |—0.66 | —0.53 | —0.26 | —0.46 | —0.22 —0.06 |—0.55
| 10 || -0.78 | 1.13 —1.63 |—1.86|—1.94|—1.36 |—1.34|—1.13 |—0.78 —0.94 —0.68 |—0.41 || -1.16
Il || 1.14 —1.66 |—2.23 |—2.50 | 2.58 |—-1.95 |—1.90 |—1.60 ;—1.22 —1.33 | —1.09 | 0.71 |—1.66)
|| Noon. | —1.34|—1.98 | —2.58 | —2.87 | 2.96 | -2.34 |—2.26 |—1.90 | —1.51 | —1.58 | —1.36 0.94 —1.97|
| 1 —1.38 | —2.04)—2.62 |—2.98 |—3.06 | 2.51 |—2.40 | 2.02 | -1.62 }|—1.66 | —1.47 —1.03 | —2.07)
| 2 —1.24)—1.86|—2.38 | -2.78 | 2.89 | -2.44 |—2.33 |—1.94 |—1.56 /—1.59 —1.39 |—0.99 || -1.95)
j|- 3 —0.98 |—1.47 | —1.92 | —2.36 | —2.51|—2.21 |—2.08 |—1.74 | —1.35 |—1.38 —1.16 }|—0.82) -1.66
4 | —0.65 —0.97 —1.34|—1.79 |—1.98 |—1.80 |—1.70 | —1.42 |—1.05 |—1.07 |—0.83 —0.57 | —1.26
5 ||—0.32|—0.43 |—0.73 | -1.17 | —1.40 |—1.32 |—1.26 |—1.06 | —0.70 | —0.72 aciakgce Sigil
6 |, 0.05 0.04 | —0.19 | —0.54 |—0.81 |—0.80 |—0.80 |—0.70 | —0.38 |—0.36 |—0.10| 0 00 -0.39
7 || 0.14} 0.39 0.25| 0.04|—0.25 |—0.28 |—0.84|—0.34 /—0.11 /—0.03} 0.19 adie fees |
eS 0.25) 0.60) 0.56) 0.54] 0.27) 0.20} 0.09} 0.00 0.10) 0.24) 0.38 0.34, 0.30 |
| 9 0.30; 0.69} 0.78{ 0.96) 0.76} 0.63} 0.50} 0.32 0.27 | 0.47; 0.49) 0.388) 0.55)
10 0.34} 0.72) 0.96) 1.33) 1.22] 1.02] 0.89] 0.64) 0.42] 0.67 0.53 | 0.38 | 0.76)
11 0.38) 0.74) 1.14], 1.66) 1.68] 1.40] 1.26] 0.97] 0.58} 0.85] 0.55 0.33 | 0.96 ||
| — | | a |
| Mean, |—8.26 —6.62/—5.72|-2.97| 0.74 | 3.55 | 4.82 | 4.32 | 2.40 —0.91|-3.95 5.86 |
| XXXIX.

| SWITZERLAND. —Sr. Bernarp. Lat. 45° 52’/N. Long. 9° 22’ E. Gr. — Dove.

The numbers without sign must be added; those with

F

| Hour, | Jan. | Feb. | March. April. | May.
} Mian. | 0.34! 0.55| 0.751 1.19] 1.26
| 2 0.52) 0:78| 1.14] 1.64] 1.75
4 0.82] 1.06] 1.50] 1.84] 1.91
6 0.65| 0.86]; 1.20] 1.50] 1.53
8 0.48] 0.26] 0.14/—0.08|—0.25
10 ||—0.35/—0.91|—1.06 | —-1.26|—1.39
|| Noon. ||—1.40|—1.66|—1.74 | —2.11|—2.15
2 ||-1.87!-1.55|—-1.89| -2.12]—-2.12|
4 ||—0.42|—0.71 | —1.14|—1.55|—1.47
6 0.09 0.17] 0.09|/—0.26|—0.35
8 0.25| 0.44] 0.49] 0.49] 0.50
10 0.37} 0.55; 0.55| 0.71| 0.76
eee |
Mean. ||—6.08 —8.83 | —6.66 |—3.01|—0.42

June,

1.39 |

1.88
1.98
1.46
0.01
—1.18

—1.92
—2.23
—1.65
—0.71

0.35

0.64

2.71 | 4.82 | 4.70 | 2.07 |—0.36

July. | Aug. | Sept. | Oct.
1.02! 1.08! 0.81| 0.66!
1.62} 1.53] 1.16] 0.94
1.82 | 171) 1.34 ea
146, 1.27) 0.98) 0.88
0.22) 0.16 0.08) 0.28

—1.11 —0.94 —0.86 | —0.68
: |
—1.81 |—1.77|-1.58 —1.45
(-2.01 |-1.97 -1.54 —1.52
—1.49 |—1.30 —0.88 —0.86
—0.57/—0.46 —0.26 —0.07
0.30! 0.26) 0.26] 0.22
0.56) 0.43) 0.46 0.43

—5.46

Noy.

0.33
0.42
0.65
0.50
0.27
—0.54

—1.26
—1.23
—0.37
0.08
0.70
0.40

Dec. Year.
0.28 || 0.80
0.27 || 1.14/|
0.42 || 1.35
0.32 || 1.05)
0.15 || 0.14]
'—0.23 | —0.88
0.91 |-1.65||
|-1.22 |-1.73)
'—0.02 | —0.99 |
0.22 '-0.17|
0.30 || 0.38)
0.40) 0.52

| \

6.18 | |

50

the sign — must be subtracted.

XL. 615

Austria. — Kremsmunster. Lat. 48° 3’N. Long. 14° 7’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hours. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Mean.

| | | | | |

—— | ————_ + | ———— —

Morn. 1 0.58] 0.90] 1.05} 1.14] 2.30} 2.77] 1.86] 1.94] 1.52] 1.26] 0.61] 0.40] 1.36
2 0.66| 1.03] 1.30] 1.36] 2.66] 3.08] 2.16} 2.26) 1.94] 1.58) 0.72] 0.42] 1.60
3 0.71} 1.07] 1.57] 1.63} 2.84) 3.14) 2.35] 2.50) 2.32) 1.82) 0.78] 0.42) 1.76
4 0.78} 1.12] 1.80} 1.88] 2.78) 2.90] 2.34] 2.54) 2.58) 1.97) 0.83] 0.42) 1.83

5 0.84} 1.19] 1.90] 1.99] 2.44) 2.32) 2.08] 2.30} 2.60) 1.98) 0.88] 0.46) 1.75
6 0.88} 1.24] 1.82] 1.88] 1.86) 1.54) 1.54] 1.80} 2.34) 1.91) 0.93] 0.54) 1.52
aj 0.84] 1.26] 1.50} 1.41] 1.11] 0.68) 0.94| 1.11] 1.81} 1.63] 0.92) 0.59) 1.15
8 0.67| 1.07| 0.96} 0.87) 0.31/—0.15| 0.23] 0.35) 1.09} 1.21} 0.80) 0.56) 0.66

9 0.35| 0.67| 0.30} 0.14|/—0.45|/—0.86|—0.42/—0.37| 0.28} 0.62) 0.51) 0.38) 0.10

10 |/-0.10) 0.01|—0.41/—0.58/—1.10|—1.42/—0.95|—0.98|—0.52/—0.13| 0.06) 0.05/—0.56

11 ||-0.58|—0.72|—1.06|—1.20/—1.65|—1.84|—1.39|—1.47|—1.23|—0.92|—0.47|—0.38|—1.08

| Noon. . . ||-0-98)/—1.37|/—1.56|—1.65 |—2.09|—2.17|—1.75|—1.86|—1.81|—1.68|—0.97|—0.78|—1.56

—1.22|—1.78|—1.89|—1.93|—2.42|—2.42|—-2.05|—2.21|—2.28]—2.25|—1.30/—1.03/—1.90
—1.26|—1.90|—2.02|—2.06|—2.62|—2.58 |—2.26| —2.38 |—2.56)/—2.53|—1.40|—1.09|—2.05
—1.12|—1.69|—1.99|—2.04|—2.67|—2.62|—2.33 | —2.46|—2.65|—2.49|—1.28|—0.94/—2.02
—0.86|—1.32|/—1.79|—1.89|—2.51|—2.49|—2.22|—2.34|—2.52|—2.17|—1.01|—0.66/—1.98

Bm WO be

—0.59|—0.92|—1.48|—1.60|—2.15|—2.16|—1.88|—2.00|—2.18|—1.69|—0.68 |—0.35|—1.47
—0.35|—0.57|—1.08/—1.18|—1.62|—1.66|—1.38|—1.49|—1.66|—1.14|—0.41 |—0.11|—1.05
—0.18|/—0.36|—0.65|—0.68|—0.98|—1.03|—0.76 |—0.86|—1.05|—0.66|—0.22) 0.02/—0.62
—0.04|—0.19|—0.23|—0.17|—0.34/—0.35|—0.15|—0.24|—0.46|—0.26/—0.11} 0.09|/—0.20

anranun

10 0.20| 0.18] 0.42} 0.61] 0.84) 1.02] 0.82} 0.76) 0.46) 0.34) 0.11} 0.18} 0.49
11 0.34! 0.46] 0.63} 0.82} 1.36) 1.68] 1.19} 1.15] 0.80) 0.63) 0.27) 0.25) 0.80
Midn. . . || 0.47) 0.70) 0.83) 0.97) 1.85) 2.27) 1.52) 1.53) 1.14/ 0.94) 0.46) 0.34| 1.08

6. 6 0.27| 0.34] 0.37] 0.35] 0.12/—0.06| 0.08] 0.16) 0.34) 0.39) 0.26} 0.22) 0.24
dn gli 0.33] 0.45] 0.43} 0.37) 0.07/—0.18] 0.09} 0.13] 0.38) 0.48) 0.35) 0.29) 0.27
8. 8 0.32} 0.44] 0.37} 0.35|—0.02|—0.10| 0.04] 0-')6) 0.32) 0.48) 0.35) 0.24) 0.24
359 0.21] 0.33] 0.22] 0.21|—0.09/—0.26|—0.02|—/:.04| 0.17) 0.34] 0.25) 0.25) 0.13
10.10 0.05] 0.10] 0.01} 0.02|/—0.13|—0.20|—0.07|- ).11|/—0.03] 0.11) 0.09) 0.12) 0.00

9 |/—0.12/—0.22)—0.13|/—0.12|—0.41|/—0.52|—0.31)| -0.32|—0.23|—0.28|—0.17|—0.16|—0.25
8 ||—0.14|—0.28|/—0.14|—0.12/—0.37|/—0.46 |—0.29| —0.27|—0.23|—0.29|—0.19|—0.15|—0.24
0 ||—0.06/—0.16| 0.07] 0.14| 0.03|—0.01| 0.03] 0.06] 0.08|—0.09|/—0.12|—0.12|—0.01
6 ||-0.24|—0.41|—0.43/—0.45|—0.79/—0.90 | —0.70 |—0.69 |—0.63|—0.94|—0.36 |—0.15|/—0.56

=

|
9 0.07 0.02 0-13] 0.28] 0.28] 0.34] 0.38] 0.30] 0.05} 0.06|—0.02) 0.12] 0.16

-

—0.21|—0.32|—0.26|/—0.33 |—0.76|—0.95|—0.66 | —0.63|—0.38|—0.45 |—0.24/—0.25|—0.45
-0.30/—0.42|—0.53|—0.60'—1.16|—1.22/—1.02|—1.02|—0.74|/—0.66|—0.30|—0.27|—0.69
—0.28|—0.36|—0.47|—0.53|—1.06|—1.14/—0.91|—0.93|—0.60|—0.52 |—0.25|—0.24|—0.61
—0.19|—0.26|—0.20|—0.26|—0.66 |—0.87|—0.56|—0.55 |—0.24|—0.31|—0.19 —0.22|—0.38

Be Eee oe
ee po

9.12.3.9 ||—0.42|—0.60|—0.78|—0.82 |—1.23|—1.33 —1.03/—1.10|—1.03/—0.87 0.44 —0.31)|—0.83

7. 2.2(9) ||-0.07|—-0.17)—0.07 a —0.31|—-0.15|—0.17|-0.14|-0.19|—0.13 —0.07/—0.14
| Dail.ext. ||—0.19|—-0.32|-0.06/—-0.04) 0.09} 0.36) 0.01} 0.04/—0.03)-0.28) -0.24|—0.25|~0.08
——

The numbers without sign must be added: those with the sign — must be subtracted.

F 51

616

XLI.
Austria. — Sauzpurc. Lat. 47° 48’ N. Long. 13° 1’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hour. | Jan. | Feb. | March.) April. | May. | June. | July. | Aug. | Sept. | Oct. Nov. Dec. ‘| Year.
Midn. |) 0.54| 0.70| 1.06} 1.31] 2.03} 2.07} 1.87] 1.57] 1.21] 1.02| 0.48 Sng 2 | 1.19
1 | 0.59| 0.79) 1.29) 1.58) 2.37) 2.27] 2.13] 1.81] 1.45} 1.15] 0.65] 0.50/] 1.38
2 | 0.72! 0.97] 0.51] 1.79} 2.64} 2.56! 2.36] 2.05| 1.61| 1.27| 0.81] 0.59/] 1.49
|| 3 || 0-82) 1.08} 1.75] 2.04) 2.90] 2.73, 2.64) 2.24] 1.87] 1-41/ 0.88] 0.70] 1.75
4 0.96; 1.09} 1.89} 2.21] 3.10) 2.82; 2.62) 2.23) 2.04] 1.52! 0.91] 0.69) 1.84
5 . hlO3ii5.15628), 2:01), 22:87) 8.10). 2:75). 2.59)|" 2.24) § 2.14) 1-72)| 03) SOr8nil| 1292
|
6 | 1.06; 1.34} 2.14) 2.28) 2.76) 2.45! 2.81) 2.26] 2.18] 1.77] 1.03] 0.87]/ 1.87
7 ‘|| 1.09] 1.36] 2.06] 1.86} 1.89] 1.53! 1.61] 1.74] 1.94] 1.74! 1.06] 0.94|| 1.57
8 1.12) 1.24) 1.58} 1.06} 0.84) 0.63} 0.67; 0.89) 1.15) 1-26] 1.07] 1.00|/ 1.04
9 | 0.91) 0.75; 0.76) 0.14;—0.10) —0.25| 0.20) 0.04|} 0.83] 0.48] 0.64] 0.74|| 0.39
10 | 0.38| 0.04) —0.06) —0.67 |—0.92) —1.10|—0.97 | —0.76 | —0.53|—0.35| 0.06} 0.21|/-—0.39
11 | —0.26|—0.62 —0.96 | -1.39 -1.80/ -1.87 -1.63 —1.40 —1.25 | —1.17)—0.62|—-0.35)—1.11
linnaon | —0.90 | —1.19 |—1.75 ; —1.99 | —2.36 | —2.90 | —2.14 : —2.13 | —2.00 | —1.84 | -1.25 | —0.93|| —1.78
1 —1.47|—1.68 —2.26 | —2.48 | —2.82 ~2.84 2.59 —2.59 | —1.48 | —2.39 | —1.68 | —1.47)| —2.15
2 | -1.70|—1.96|—2.55 | —2.74|—3.08 | 3.03 |-2.77 | -2.73 | -2.71 | -2.55 |-1.85 | —1.64)|—-2.44
3 —1.68 | —2.04 |—2.61 | —2.74 | —3.21 | —3.04 |—2.90 | —2.75 | —2.67 | —2.51 | —1.75 =1,55||—2.45)
4 | -1.40/-1.80 /-2.55 |) -2.60 /—3.27/ -3.00 -2.90 2.85 —2.56 |—2.21 )/-1.87/-1.19 /—2.31
5 —1.00| —1.46 | —2.26 | —2.10|—2.97 | —2.64 | -2.64 | —2.46 | -2.09 , -1.63 | —0.85 | -0.72)/—1.90.
6 —0.60|—0.76 | —1.51 | —1.52 -2.97) —2.10 | —2.05 | —1.78 | -1.31 | —0.83 | —0.35 Dal —].29;
l —0-31 |—0.27|—0.76 , —0.75 | —1.43 | —1.21|)—1.24 | —0.85 | —0.48 | —0.29 | —0.10 ~0.15| —0.65
8 0.25 -0.02/-0.16 —0.07\-0.43 —0.13 -0.24/ 0.06; 0.15! 0.16, 0.11, 0.04 0.06
9 |-0.04| 0.20} 0.17) 0.51| 0.48] 0.71) 0.67] 0.70| 0.50| 0.48| 0.24 0.17, 0.40.
10 0.12] 0.43 0.46 | 0.81) 1.03} 1.41] 1.22} 1.09} 0.78] 0.76) 0.34 0.33, 0.73,
11 0.28} 0.53 0.76 | 1.08; 1.50} 1.70; 1.56] 1.38; 0.76} 1.03] 0.52 0.41 | 0.96
Mean. | —2.71|] 1.14 | 2.49 | 6.90 | 10.42) 13.22 | 13.93 | 13.66 | 10.30! 7.37 | 1.52 | 1.638 |
XLII.
Germany.—Monicu. Lat, 48° 9’ N. Long. 11° 37’ E. Greenw.— Dove.
Degrees of Reaumur.
| Tiour. | Jan. | Feb. | March. | April. | Moy. | June.| July. | Aug. “Sept. Oct: | Nov. Dec. || Year.
Midn. 0.71] 0.92] 1.54] 2.27]. 2.58) 2.49] 2.84] 2.37) 2.17) 1.53) 0.91] .0.46;| 1.73
1 0.90/ 1.04] 1.83] 2.37]. 3.02] 3.06] 3.27] 2.64] 2.33] 1.59|) 0.87| 0.58] 1.96
2 0.97| 1.18} 2.04) 2.62/. 3.30] 3.39) 3.56] 2.94) 2.61] 1.67|/ 0.94! 0.67) 2.16
‘3 1.04] -1.30| 2.16]. 2.89]. 3.61] 3.66] 3.80! 3.19] 2.81/ 1.78] 1.00] 0.77/| 2.33
4 1.03} 1.33] 2.25) 3.12} 3.85) 3.82) 4.05) 3.41] 2.98] 1.91) 1.04] 0.85) 2.47
5 1.07| 1.43] 2.37] 3.29] 3.69] 3.25] 3.71] 3.50| 3.16] 2.01] 2.12] 0.92)| 2.46
6 1.14) 1.52] .2.56|. 2.93). 2:61} 2.11) 2.41] 2.79) 3.08)- 2.14] 113 0.99, 2.12
7 1.17) .1.55| 2.17] 1.80) 1.21) 0.77) 0.93) 1.48} 2.22} 1.84) 1.13} 0.97|) 1.44
8 1.10] 1.14) 1.14] 0.36|—0.07|-0.35/—0.28| 0.18] 0.59) 0.99) 0.75 0.88 0.54
9 0.46] 0.36 |—0.11|—0.79 |—1.00 | —1.21|—1-.25 | —1.05 |—0.74|—0.24] 0.06) 0.41) -0.42
10 |/-0.72)—0.61 /—1.18 —1.80 —1.99 +1.96 —2.12 —1.88 —1.70|—1.34 —0.79 —0.42 | -1.38
11 —1.06 | —1.46 —2.04,-2.39 —2.59 —2.69|—2.66 —2.58 '—2.61|—2.19 —1.49 —0.97 | —2.06

The numbers without sign must be added ;

those with the sign — must be subtracted.

52

XLII. 617

Germany. — Municu, Continued.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

-
Hour. Jan. Feb. |March. April. | May. | June. | July. | Aug. | Sept. | Oct. Nov. | Dec. || Year.
Noon |—1.70 —1.93 |—2.67 —2.99 |—3.28 | —2.98 |—3.14 | —3.09 | —3.18 | —2.69 | —1.94 | —1.02 2.55)

1 '—2.08 —2.31|—3.01 —3.27 |—3.59 | —3.41 |—3.48 | —3.55 | —3.58 | —3.08 | —2.23 | -1.83 —2.95 |
2 |—2.15 —2.40 |—3.24 —3.60|—3.77 |—3.79 | —3.75 | —3.72 |—3.74 | —3.15 | —2.05 | —1.85 || —3.10|
3 | 1.83 -2.15'-3.17 -3.45 -3.77|-3.54|—3.83 |-3.58 |—3.56 /—2.87 |—1.75 —1.43| —2.9)l|
4 -1.08 —1.67 —2.64 -3.18 —3.41 —3.34|/—3.49 | —3.30 |—3.24 | —2.27 | —1.02 | —0.76 || —2.45 |
5 ea —0.95 |—1.98 —2.51 | —2.87 | —2.80|—3.07 | —2.76 —2.56 |—1.27 | —0.43 | -0.34|| 1.83 |
6 0.16 —0.37 -0.94|=1.58 —2.05 | —1.94|—2.32 | —1.81 | —1.29 | —0.44 | 0.12 | —0.13 oe!
7 | 0.04/—0.07 —0.20 —0.36 —0.74|—0.84 |—2.99 |—0.47 |—0.30| 0.08) 0.20) 0.06)|—0.47)
8 | 0.23; 0.22 0.28 0.40} 0.41) 0.61] 0.40; 0.55) 0.37) 0.56| 0.44) 0.14] 0.38)
9. || 0.39) 0.45 0.55) 0.91} 1.13] 1.35] 1.20| 1.15] 0.93] 0.88] 0.57! 0.23]| 0.81)
10 0.49} 0.59 1.02) 1.31] 1.65] 1.86] 1.87) 1.60! 1.40] 1.14] 0.74 | 0.33) 1.17
11 | 0.61) 0.77| 1.338; 1.69] 2.18] 2.28) 2.41) 2.06] 1.80) 1.34) 0.85) 0.40]; 1.48
Mean. 2.15 —0.12| 0.75 | 5.57 | 9.29 |12.74/|13.65 | 12.93 | 9.45 | 6.28 | 1.55 |—1.28]|

XLII.
Bonem1a.—Pracue. Lat. 50° 5’N. Long. 14° 25' E. Greenw.— Dove.

Degrees of Reaumur.

Ifour. | Jan. Feb. |March.| April. | May. | June. | July. | Aug Sept Oct. | Noy. Dec. | Year.
Midn | 0.30] 0.52/ 1.03] 1.47} 1.70]. 1.68| 1.72] 1.17] 1.23] 0.84] 0.36] 0.25] 1.02|
1 “|| 0.40} 0.60] 1.14] 1.68] 1.97) 1.97] 2.05] 1.78] 1.49] 1.02) 0.45) 0.32]| 1.24!
2 || 0.50] 0.71] 1.29]. 1.95| 2.25] 2.28] 2.34] 2.10] 1.72] 1.19] 0.54] 0.39]| 1.43)
3 0.55} 0.83) 1.44] 2.17] 2.46| 2.47] 2.60| 2.38] 1.96] 1.31| 0.61] 0.50|| 1.61]
4 0.65} 0.89} 1.60} 2.39} 2.75| 2.71] 2.91] 2.63] 2.19) 1.49] 0.70] 0.56]) 1.79
5 0.71| 0.99! 1.72| 2.64] 2.96] 2.86] 3.07| 2.88] 2.43| 1.65| 0.77| 0.65] 1.94]
6 0.77| 1.00} 1.81]. 2.75| 2.96]. 2.71| 2.92] 2.93] 2.61] 1.73] 0.82] 0.72|| 1.98
7 || 0.68] 0.99] 1.53] 2.82] 2.11| 1.88] 2.13! 2.34] 2.29] 1.65] 0.79] 0.73]| 1.62
gs || 0.73] 0.88] 1.28| 1.29] 0.98] 0.82] 1.02) 1.30] 1.62] 1.29] 0.66} 0.70|| 1.05
9 0.62| 0.57| 0.63| 0.32} 0.06|/-0.14| 0.17| 0.21] 0.60; 0.70| 0.41] 90.54] 0.39!
10 0.26] 0.15|—0.11 |—0.53|—0.91 |—0.93 |—0.95 |—-0.77 |—0.51|—0.10| =0.12| 0.17|] -0.36|
11 ||-0.16|—0.45 | —0.77 |—1.51 | —1.60 |—1.58 | —1.62 |—1.50 |—-1.46 | —0.86 | 0.46 | —0.22|| —1.02|
Noon. |—0-60|—0.92 | —1.37 |—2.09 | —2.16 |—2.08 | -2.16 | —2.18 |-2.02/-1.53 —0.86 —0.65 | -1.55||
1 ||-0.93|—1.27|—1.83 |-2.48 | 2.56 |—2.48 | -2.59 | -2.61 |-2.56|—2.01 1.13 |—0.95 |] 1.95
2 ||-1.10|—1.50|—2.20)|—2.74 |—2.80 | -2.73 | -2.83 | -2.89 |—-2.84|-2.31 —1.25 |—1.07|| —2.19]|
3 ||-1.11|—1.51/ -2.29 |-2.88 |-2.90 |-2.79 |—2.93 |-3.01 |—2.96 2.32 —1.28 —0.99|| -2.25
4 ||-0.93|—-1.35 | -2.20 | —-2.76 | —2.82|—-2.71 |-2.92 -2.85 —2.78|—2.10|—0.87 | —0.79 | —2.09|
5 |-0.68)-0.97 -1.83 2.46 |-2.53 -2.56 —2.83 |-2.66 -2.35/-1.58/—0.62 —0.55 | —1.80
6 |-0.44|—-0.61 | —1.26 |—1.91 |—2.17 |-2.10 —2.36 |—-2.11 —1.64|—1.01 0.36 -0.37 | _1 36)
7 |-0.31|—0.32|/—0.70 |) —1.12|/—1.49 |-1.37 | —1.59 -1.23 -0.87 -0.54 0.19 —0.21 | —0.83
8 |—0.23|-0.06 —0.24 |—0.83 |—0.51 —0.39 |—-0.58 |—-0.34 -0.24 -0.10| 0.01 —0.19 | —0.27
9 0.01| 0.12] 0.09] 0.20] 0.27| 0.30] 0.22] 0.20! 0.27| 0.23] 0.16) 0.06 0.18
10 | 0.10) 0.26) 0.40) 0.72) 0.80; 0.91) 0.90) 0.81 0.74) 0.51 0.29 0.16) 0.55
11 | 0.19) 0.39) 0.66) 1.12) 1.24) 1.28) 1.32] 1.20) 1.08) 0.85 0.43 0.25) 0.88
— ee | : SSN eee
Mean. |-1.69| 0.64 | 2.20 | 7.27 |11.27|14.47| 15.66 |15.01 11.52! 7.94 | 3.02 -0.12

SSS SSS SS =

The numbers without sign must be added ; those with the sign — must be subtracted.

F 53

618 XLIV.
Bonemia. — Pracue. Lat. 50° 5’ N. Long. 14° 24’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hours. Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Mean.

Morn. 1 0.45] 0.76] 0.86] 1.73] 1.47} 1.90] 1.93} 1.59] 1.46} 1.06] 0.73] 0.45) 1.20
2 0.52} 0.88] 1.05] 2.06] 1.77) 2.22] 2.24) 1.85] 1.69) 1.18) 0.79] 0.52) 1:40
3 0.54} 0.98] 1.24] 2.45] 2.08) 2.62} 2.36) 2.04) 1.85] 1.23) 0.82] 0.54] 1.56
4 0.53] 1.06) 1.42] 2.82) 2.31} 3.02) 2.27] 2.10] 1.95} 1.24] 0.78] 0.55) 1.67

0.50} 1.14] 1.55) 3.02] 2.35] 3.22] 2.01} 2.01] 1.97) 1.22) 0.78) 0.60) 1.70
0.49] 1.15) 1.60) 2.92) 2.12] 3.03] 1.62] 1.76] 1.90) 1.19} 0.80} 0.70) 1.61
0.47} 1.09} 1.51} 2.43] 1.62] 2.40) 1.16] 1.36] 1.69} 1.10) 0.77) 0.80] 1.37
0.42] 0.91] 1.24] 1.59; 0.92] 1.40) 0.66] 0.83) 1.28) 0.90} 0.69) 0.82) 0.97

9 0.29} 0.55] 0.77) 0.53) 0.15} 0.24] 0.10} 0.19] 0.64) 0.51] 0.42) 0.67) 0.42
10 0.08|—1.01| 0.16|/—0.56|—0.57/—0.85|—0.52/—0.51/—0.20|—0.07|—0.02) 0.31|—0.31
11 ||—0.21|—1.19|—0.52|—1.52|—1.16/—1.68|—1.19|—1.23|—1.14/—0.78|—0.55|—1.18}—0.95
Noon. . . ||—0.52}—1.10/—1.16|/—2.25|—1.60|—2.23/—1.84/—1.86|—2.00|—1.47|—1.10|—0.70|—1.49

—0.76|—1.51|—1.63|—2.74|—1.91|—2.55|—2.37|—2.33|—2.63|—1.99/—1.47|—1.08/—1.91 |!
—0.88)—1.70/—1.89|—3.00|—2.14|—2.76|—2.66|—2.57|—2.89|—2.21/—1.58|—1.23|—2.13
—0.85|—1.64|—1.92|—3.08) -2.26|—2.92 |—2.65|—2.53|—2.76|—2.08|/—1.44|—1.13|—2.11
—0.71|—1.39|—1.75|—2.97 |—2.26|—2.98 | —2.36 | —2.23| —2.31/—1.68|—1.08|—0.87|—1.88

me 0 DO

—0.31|—0.66|—1.10|—2.13|—1.71 |—2.45 |—1.28|—1.18|—1-07/—0.60|—0.31|—0.31/—1.09 |}
—0.16|—0.34/—0.73|—1.42|—1.17/—1.75|—0.73|—0.62|—0.52|—0.17|—0.04|—0.17|—0.65 |,
—0.06|—0.09 |—0.40|—0.64|—0.56|—0.85|—0.24/—0.12/—0.08) 0.13} 0.10/—0.11/—0.24

moastn a

0.02! 0.11} 0.10} 0.11) 0.03} 0.06} 0.19] 0.30} 0.26} 0.34] 0.20} 0.07] 0.12
10 0.11} 1.35] 0.18] 0.71] 0.52] 0.81) 0.61] 0.65] 0.57) 0.51] 0.32] 0.01] 0.53 |!
11 0.22) 1.10} 0.42) 1.15) 0.89] 1.32] 1.05] 0.97) 0.87) 0.70) 0.44] 0.14] 0.77

Midn. . . || 0.34) 0.61] 0.65} 1.46} 1.18] 1.64] 1.51] 1.28 1.17) 0.89} 0.61; 0.31) 0.97

i}

1
—0.51/—1.05|—1.45|—2.65|—2.08 |—2.86|—1.86|—1.75|—1.70/—1.14|—0.67|—0.56 |—1.52 |
|
|
|
{
|

0.09} 0.24) 0.25} 0.40) 0.21] 0.29) 0.17] 0.29) 0.42) 0.29) 0.25] 0.19] 0.26
0.15} 0.38] 0.39} 0.50} 0.22] 0.33] 0.22] 0.37] 0.59) 0.47; 0.37] 0.32] 0.36
0.18} 0.41] 0.42} 0.47] 0.18] 0.27} 0.21] 0.36] 0.60) 0.51) 0.39] 0.35) 0.36
0.16} 0.33] 0.34} 0.32] 0.90) 0.15] 0.15] 0.25) 0.45) 0.42} 0.31] 0.30] 0.27
0.09} 0.17) 0.17} 0.08|/—0.03|/—0.02| 0.04] 0.07) 0.18) 0.22) 0.15] 0.16) 0.11

aD
ecemant nH

~_
Se

_
Oo

—0.13|—0.17/—0.16|—0.15|—0.16|—0.10/—0.44/—0.30|—0.31|—0.26)/—0.20/—0.17|—0.21
—0.15|—0.21)—0.23|/—0.24|—0.19|/—0.19 |—0.43 |—0.31|—0.36|—0.30|—0.23}—0.21|—0.25
—0.09} 0.27|—0.04| 0.21} 0.17) 0.36/—0.14|/—0.05|—0.14/—0.17|/—0.15|—0.17) 0.01
—0.23|—0.40|—0.46/—0.74|—0.58|—0.73 |—0.77 |—0.66 |, —0.69 | —0.54|—0.36|—0.28|—0.54 |
|:
—0.21/—0.31|—0.19/—0.29|—0.26|—0.18 |—0.75|—0.61 -0.60/—0.56 —0.41 —0.22/—0.38 |
—0.23|—0.40 | —0.33 /—0.71|—0.61|—0.68|—1.00 —0.87 —0.81|—0.66|—0.45 | —0.21)/—0.58 ||
—0.17|—0.30|—0.20)—0.58|—0.50|—0.58 |—0 86 |—0.75|—0.68/—0.55|—0.39|—0.13|/—0.97
—0.15/—0.21|—0.06|—0.16|—0.15 |—-0.08 —0.61 |—0.49 |—0.47/—0.45|—0.35|—0.14|—0.28 |,

Oa nnr

bo hw bh bw
om °

a om ©

1 OW +
— ee DO DO

{
9.12.3.9 —0.27|/—0.52/—0.60/—1.17|—0.92/—1.21/—1.05|—0.98|—0.97|—0.68/—0.48 —0.31|—0.76
7. 2.2(9) —0.09)/—0.10)—0.15|—0.09|—0.12|—0.06|—0.28 |—0.15|—0.17|/—0.11|—0.10/—0.14/—0.13
“Dai —0.17|—0.18/—0.16|—0.03] 0. .12|-0.15|—0.24|—0.46|—0.49|—0.38)--0. 22
| Dail. ext. ||—0.17/—0.18/—0.16|/—0.03] 0.05) 0.1 0 15) 0.24)—0 46} 0.49 |—0.38 }--0.21|—0.22
The numbers without sign must be added: those with the sign — must be subtracted.

F 54

XLV. 619
Enctanp. — Prymovts. Lat. 50° 99/N. Long. 4° 7! W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Fahrenheit.

Jan. | Feb. |March.| April: May. | June. | July. Aug. | Sept. | Oct. | Nov. Dec.

———_

—

Morn. 1 0.86| 1.46) 232) 4.01) 5.13 4.34| 4.75| 4.16| 38.24) 2.66 1.58) 0.95
0.90| 1.67| 2.63} 4-43) 5.94 4.82| 5.38| 4.79 3.60| 2.79| 1.69} 0.86
0.99| 1.87| 302) 4-91) 6.62 5.13| 5.69| 5.45 4.03| 3.02| 1.80] 0.74| 3-60
1.15| 2.12| 3.31] 5.13) 6.75 5.00| 5.58| 5.76| 4-34) 3.31 1.96| 0.81| 3.76

me wh

1.37| 2.36} 3.40) 4.91) 6.03 4.57| 4.82| 5.42| 4.25) 3.51 2.09| 1.04| 3-65
1.53| 2.48| 3-08) 3.98} 4.37 2.79| 3.35| 4.21] 3-62) 3.38 2.14| 1.31) 3.02
1.46| 2.30| 2-25| 2.39] 2.00 0.95| 1.92| 2.25] 2-32) 2.66 1.89| 1.40) 1.94
1.10| 1.67| 0.97) 0.29|-0.54 —1.01|—0.65|—0-11 0.50| 1.26] 1.24) 1.13) 0.50

natn oa

9 0.36| 0.59|—0.63|—1-94 —2.88|—2.70|—2.57|—2.39 —~1.53|—0.65| 0.16] 0.41|—-1.15
10 ||—0.61|—-0.83|—2.28 —3.94|—4.57|—-3.87 |—4.03 —4.21|—3-44|—2.70|—1.17|—0.61 —2.68
11 || —1-58|—2.25|-3.56 —5.40|—5.63 |—4.64|—5.02 —5.36|—4.93|—4.41|—2.43|—1.67 —3.92
—2.32|—3.33|—4.43|-6.17 —6.12|—4.93|—5.58|—5.87 —5.74|—5.40|—3.29|—2.43|—4.64

—2.63|—3.85|—4.70|—6.37|—6.37 —5.02|—5.81|—5-96|—5-92|—5.51 —3.56|—2.70|—4.86

Noon. 1

g || -2.50|-3.69|—4.43 —5.99|—6.37 |—4.91|—5.76 —5.72|—5.49 —4.84 —3.22|—2.45|—4.61
3 || —1.96|-3.02|—-3.74 —5.22|—6.12|—4.64|—5.40|—5.27 —4.64|—3.71|—2.45|—1.85|—4.01
4 ||-1.26|-2.07\—-2.81 ~4.14|—5.47|—4.03 |—4.64|—4.52 ~3.49|—2.45|—-1.55|—1.10|—3.18

—0.59|—1.10|—1.76|—2-86|—4.32 —~3.04|-3.47|—3.44|—2.18|—1.33 —0.77|—0.41|—2.12
—0.07|—0.38 |-0.74|—1.42|—2.68|—1.73 —9.00|—2.23|—0.88|—0.45|—0.28 0.05|—1.06
0.29| 0.09| 0.14| 0.00|—0.81|—0.27 —0.38|—0.47| 0.36) 0.23] 0.07 0.34|—0.05
0.50! 0.36] 0.86| 1.26) 0.99) 0.74 1.10] 1.06| 1.37| 0.79) 0.25 0.52| 0.81:

nan or

9 0.63| 0.56| 1.35) 2.25| 2.36 9.21| 2.27| 2.23] 2.12) 1.338 0.47| 0.72
10 0.72| 0.77| 1.69| 2:93] 3.29 2.93| 3.11} 2.97] 2.59) 1.85 0.77| 0.88
11 0.79| 0.99| 1.89} 3-35) 3.89 3.44| 3.67| 3-40| 2.84] 2.23 1.08} 1.01
Midn.. .|| 0.83] 1.26) 2.07 3.67| 4.46| 3.87| 4.21] 3.71 2.99| 2.48] 1.37] 1.04

6. 6 0.74| 1.06| 1.17) 1.28| 0.86 0.54| 0.68} 0.99} 1.37) 1.46 0.97| 0.68
end 0.88| 1.19] 1.19) 1.19) 0.61) 0.34 0.52| 0.90| 1.35) 1.44) 0.99 0.88
8. 8 0 81| 1.01) 0.92) 0.79 0.23| 0.14! 0.23) 0.47] 0.95 1.04| 0.74] 0.83
OcEo 0.50! 0.59| 0.36) 0.16|—0.27|—0.25 —0.16|—0.09| 0.29) 0.34) 0.32 0.56
10.10 0.07|—0.05|—0.27|—0.52|—0.65|—0.47 —0.47|—0.63|—0.43!—0.43|—0.20 0.14

_ 2. 9 ||—0.14|—0.27|—0.27|—0.45 —0.68|—0.59|—0.70|—0.41 |—0.36 —0.29|—0.29|—0.11
: —0.29|—0.16|—0.25 |—0.34|—0.45 —6.43|—0.16 |—0.16 |—0.23|—0.27 —0.20
. 2.10 ||—0.09|—0.16| 0.11) 0.32 0.43| 0.27) 0.23) 0.50) 0.25) 0.14 —0.11|—0.09
. 2. 6 ||—0.34|—0.54|—0.70|—1.15 —1.55|—1.28|—-1.46|—1.24|—0.92 —0.63|—0.43|—0.36

aaac
n
|
=
—
a

—0.52|—0.70|—1.10|—1.80|—2.18)—1 .98|—2.18|—1.73|—1-60|—1.10 —0.68|—0.54

Tis 24

8. 2 —0.70|—1.01|—1.73|—2-86 |—3.47 |—2.97 —3.22|—2.93 —2.50|—1.80)—0.99 —0.68|—2.07

8.1 —0.77|—1.10|—1.87|—3.04|—3.47 —3.02|—3.24|—3.04|—2.72|—2.14 —1.17|—0.79 |—2.21
1 —0.59|—0.79 |—1.24|—2.00|—2.18 —2.05|—2.21|—1.87|—1.80|—1.44 —(0.83|—0.65|—1.46

9.12.3.9 ||-0.88!-1.31|-1.87|-2.77|—4.20|-2.52|-2.81|-2.84|—2.45|—-2.12)—1.28 —0.79|—2-07
7. 2.2(9)|| 0.07,-0.07| 0.14) 0.23] 0.09) 0.11) 0.05) 0.25 0.27| 0.11|-0.09| 0.09) 0.11

!

nn

The numbers without sign must be added ; those with the sign — must be subtracted.

F 90

620 XLVI.
Eneianp. — Prymovuts. Lat. 50° 22’ N. Long. 4° 7 W. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dover.

Degrees of Reaumur.

March.} April.| May. | June. | July. Aug.

0.40) 0.74) 1.17] 1.97} 2.64] 2.14] 2.39) 2.13] 1.60) 1.24] 0.75) 0.38] 1.46
0.44) 0.83} 1.34; 2.18) 2.94] 2.28] 2.53] 2.42) 1.79) 1.34] 0.80] 0.33] 1.60
0.51 0.94] 1.47| 2.28] 3.00) 2.22} 2.48] 2.56] 1.93] 1.47] 0.87] 0.36] 1.67

wm OO bo

0.61| 1.05) 1.51) 2.18} 2.68) 2.03] 2.14) 2.41] 1.89] 1.56] 0.93] 0.46) 1.62
0.68} 1.10} 1.37) 1.77} 1.94} 1.24) 1.49) 1.87] 1.61] 1.50] 0.95) 0.58] 1.34
0.65) 1.02} 1.00} 1.06) 0.89) 0.42} 0.63} 1.00) 1.03] 1.18] 0.84] 0.62] 0.86

Morn. 1 0.38} 0.65) 1.03] 1.78} 2.28} 1.93} 2.11] 1.85] 1.44] 1.18] 0.70) 0.42] 1.31
| 0.49] 0.74! 0.43) 0.13|/—0.24|—0.45|—0.29|—0.05} 0.22] 0.56) 0.55) 0.50} 0.22

manager on

©

0.16| 0.26|—0.28|—0.86|—1.28|—1.20|—1.14|/—1.06|—0.68/—0.29| 0.07] 0.18/—0.51
10 ||—0.27)—0.37|—0.99 |—1.75 |—2.03|—1.72 |—1.79 |—1.87|/—1.53|—1.20|—0.52 |—0.27|—1.19
11 |/—0.70|—1.00)—1.58 |—2.40/—2.50|—2.06 |—2.23 |—2.38]—2.19|—1.96|—1.08 |—0.74|—1.74
Noon. . . |/—1.03|/—1.48|—1.97|—2.74|—2.72 |—2.19 |—2.48 |—2.61 |—2.55|—2.40/—1.46|—1.08 |—2.06

—1.17|—1.71|—2.09 | —2.83 |—2.83 |—2.23|—2.58 |—2.65|—2.63|—2.45|—1.58 |—1.20/—2.16
—1.11/—1.64|—1.97|—2.66 |—2.83 |—2.18 |—2.56 |—2.54|—2.44/—2.15/—1.43|—1.09|—2.05
—0.87|—1.34/—1.66 |—2.32|—2.72 |—2.06|—2.40/—2.34|—2.06|/—].65|—1.09 |—0.82|—1.78
—0.56|—0.92|—1.25|—1.84|—2.43 |—1.79|—2.06 |—2.01|—1.55/—1.09|—0.69 |—0.49|—1.39

Bm Oh =

—0.26|—0.49 —0.78|—1.27|—1.92|—1.35 |—1.54|—1.53|/—0.97/—0.59 |—0.34|—0.18|—0.94 ||
—0.03|—0.17|/—0.33 |—0.63|—1.19|—0.77|—0.89 |—0.99/—0.39 | —0.20|—0.10| 0.02|—0.47 ||
0.13) 0.04) 0.06|—0.00)|—0.36|—0.12|—0.17|—0.21| 0.16} 0.10) 0.03] 0.15/-0.02 |!
0.22) 0.16) 0.38) 0.56} 0.44) 0.33] 0.49] 0.47) 0.61] 0.35) 0.11] 0.23) 0.36 |

Dato or

9 0.28] 0.25] 0.60} 1.00] 1.05] 0.98} 1.01] 0.99) 0.94] 0.59] 0.21] 0.32] 0.69 |
10 0.32) 0.34) 0.75} 1.30] 1.46] 1.30] 1.38) 1.32] 1.15) 0.82] 0.34] 0.39] 0.91
11 0.35) 0-44) 0.84) 1.49] 1.73] 1.53] 1.63, 1.51] 1.26] 0.99} 0.48] 0.45] 1.06
Midn. . .j/ 0.37) 0.56) 0.92) 1.63) 1.98] 1.72] 1.87) 1.65] 1.33} 1.10) 0.61] 0.46) 1.18

0.33] 0.47| 0.52] 0.57] 0.38] 0.24] 0.30] 0.44] 0.61] 0.65| 0.43] 0.30] 0.44
0.39} 0.53] 0.53] 0.53} 0.27| 0.15] 0.23] 0.40] 0.60] 0.64) 0.44] 0.39] 0.42
| 0.36| 0.45| 0.41] 0.35] 0.10|-0.06| 0.10] 0.21] 0.42] 0.46] 0.33] 0.37] 0.29
0.22, 0.26) 0.16) 0.07/—0.12|-0.11|-0.07/—0.04} 0.13] 0.15) 0.14] 0.25! 0.09

0.03'—0.02|—0.12|/—0.23|—0.29 |—0.21|—0.21|—0.28/—0.19|—0.19|—0.09| 0.06|—0.14

ope mnt DD

9 | —0.06 —0.12 —0.12\—0.20 —0.30 —0.26 —0.31/—0.18/—0.16 —0.13|/—0.13|—0.05 |—0.17
8 | 0.07, —0.13 —0.07/—0.11/—0.15 —0.20/—0.19 —0.07 —0.07 —0.10 —0.12'—0.09 —0.11
10 ||-0.04|-0.07; 0.05} 0.14] 0.19] 0.12] 0.10) 0.22] 0.11) 0.06/—0.05|—-0.04| 0.07
6 ||-0.15|—0.24!—0.31|-0.51|—0.69 |—-0.57|—0.65/—0.55|—0.41 |—0.28/—0.19 |—0.16|—0.39

| |
|

DEN

at

| —0.23 -0.31 —0.42 —0.80/—0.97 —0.88 /-0.97 —0.77/-0.71 —0.49 —0.30'—0.24 —0.60
i—0.31 ~0.45'—0.77|—1.27 —1.54|/-1.32/—1.43 —1.30/—1.11 —0.80/—0.44/—0.30 —0.92
\—0.34'-0.49 —0.83)—1.35|/—1.54/—-1.34/—1.44/—1.35|—1.21|—0.95 |—0.52/—0.35/—0.98
'—0.26/—0.35 —0.55/—0.89'—0.97|—0.91/—0.98 |—0.83 —0.80'—0.64/—0.37/—0.29 | —0.65

am wo
= = bh

v2)

| 9.12.3.9 ||—0.37|—0.58 —0.83)—1.23 —1.42 —1.12/—1.25|—1.26|—1.09 —0.94'—0.57'—0.55 |—0.92 !
| 7. 2.2(9) 0.03|—0.03 0.06) 0.10; 0.04| 0.05) 0.02) 0.11} 0.12) 0.05|—0.04! 0.04) 0.05 1
| | | | \
Dail.ext. || -0.25'—0.31 —0.29 —0.28 0.09’. 0.03 —0.03 —0.05 —0.35 —0.45' -0.32 —0.29 -0.25 |

_-———

The numbers without sign must be added: those with the sign — must be subtracted.

F 56

_ XLVII. 621
Betcium. — Brussets. Lat. 50°51’ N. Long. 4° 22’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Jan. | Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct.

ee | | Sf SS |

0.67 0.49] 0.73) 1.56
0.49] 0.39) 1.71
0.54] 0.08} 1.86

0.65} 0.02) 1.97

1 0.58 2.57

2 0.60) 0.73] 1.36] 2.59] 2.89] 3.12] 2.57] 2.84] 2.00] 0.99
3 0.60) 0.79} 1.54) 2.99] 3.17] 3.18] 2.74] 3.20] 2.33] 1.15
4 || .0.60) 0.86] 1.70] 3.29] 3.28) 3.14| 2.74) 3.42] 2.57) 1.31

2.23

0.77} 0.25] 1.93
0.85} 0.65) 1.71
0.81) 0.97] 1.27
0.58| 0.97) 0.64

5 0.62) 0.92} 1.79] 3.29] 3.06] 2.71| 2.47] 3.32] 2.58} 1.40
6 || 0.64] 0.97] 1.74] 2.86] 2.45} 2.00] 1.88) 2.82] 2.28] 1.35
7 || 0.61| 0.93] 1.50] 2.01] 1.52} 1.10]. 1.06] 1.94] 1.67] 1.11
8 || 0.46] 0.75 0.86) 0.44

0.19} 0.56/—0.08
—0.31/—0.13/—0.81
—0.80/—0.84)—1.44
—1.16|—1.29|—1.92

0.18} 0.39 —0.35/—0.59
10 ||—0.22/—0.13|—0.36|—1.42|—1.43|—1.35|—1.33|—1.37|—1.06|—0.60
11 ||-0.65|—0.71|—1.11|—2.23| —2.06|/—1.86|—1.77 |—2.19|—1.86|—1.23
—1.01/—1.23 —2.77|—2.52

=e 20) ep —3.11)—2.89
—1.19|—1.65|—2.29|—3.29|—3.21|—2.97|—2.51|—3.58|—3.05|—1.95
—0.99|—1.49|—2.21|—3.33|—3.40|—3.25|—2.69 |—3.69 |—2.98|—1.71
—0.70)—1.14 —3.18)—3.36

—1.27|—1.03|—2.33
—1.505|—0.59)|—2.-28
—0.75|—0.26|—2.06

ee

—0.39|—0.72|—1.51|—2.76|—2.97|—2.83|—2.47|—3.02|/—2.05|—0.84|—0.45|—0.16|—1.68
—0.15|—0.33|/—1.03|—2.05}—2.21|—2.17)—1.91|—2.19|—1.30|—0.39 |—0.18|—0.25|/—1.18
0.02|—0.03|—0.55|/—1.13|—1.20|—1.28)—1.11/—1.15|—0-49|—0.01| 0.03|—0.37|—0.61
0.12} 0.17|—0.10|—0.16/—0.12|—0.31|—0.20|—0.09} 0.23] 0.28} 0.19}—0.33/—0.03

mat

0.32] 0.05} 0.50
0.41} 0.37} 0.90
0.47) 0.75] 1.19
0.49} 0.89} 1.89

0.21) 0.31 0.69} 0.82
10 0.31} 0.41) 0.59} 1.31} 1.51] 1.37) 1.31] 1.48] 1.13} 0.60
11 0.42) 0.50) 0.83} 1.70] 1.96] 1.97] 1.77] 1.89] 1.33] 0.68
Midn. . .|| 0.52] 0.59) 1.02} 1.96] 2.28] 2.44) 2.08) 2.19) 1.49) 0.75

—1.32|—1.33/—2.22

6. 6 0.25) 0.32 —0.01} 0.31 0.33] 0.20] 0.26
ned 0.31] 0.45} 0.47} 0.44} 0.16|—0.09|—0.02] 0.39] 0.59] 0.55! 0.42] 0.30] 0.33
8. 8 0.29} 0.46] 0.47] 0.35] 0.16|/—0.07/—0.03] 0.37/ 0.53] 0.48] 0.39) 0.32] 0.31
9:9 0.20} 0.35] 0.34] 0.17] 0.12] 0.04|-0.02| 0.24] 0.32] 0.28] 0.25] 0.25; 0.21
10.10 0.05| 0.14). 0.11} 0.05] 0.04} 0.01/—0.01} 0.05! 0.03) 0.00} 0.05; 0.12] 0.05

7. 2.9 ||—0.12/—0.14|—0.17|—0.20|—0.29/—0.40|—0.27|—0.27|—0.20|—0.12|—0.05|—0.04|—0.19
6. 2. 8 ||-0.14|—0.17|—0.22/—0.20|—0.29|—0.43|—0.28|/—0.28|—0.18|—0.11/—0.08|—0.24|—0.22
6. 2.10 |/—0.08|—0.09| 0.01} 0.29} 0.25) 0.13) 0.23} 0.24] 0.12] 0.00/—0.00|—0.00| 0.09
6. 2. 6 ||—0.23)/—-0.34/—0.53|/—0.83/—0.99|—1.05|—0.85|—0.98 |—0.69 | —0.33 |—0.20|—0.21|—0.60

2 —0.29|—0.36 —0 40|-0.64/—0.85 —0.94/—0.73/—0.82|—0 69|—0.42|—0.23|—0.03/—0.53
8. 2 —0.37|—0.45 |—0.63|—1.22/—1.39 |—1.41/—1.18|—1.38|—1.12|—0.64|—0.35|—0.03 —0.85
1 —0.37/—0.41/—0.55|—1.13/—1.23|—1.25|—1.07|—1.23|—1.03|—0.64|—0.37|/—0.18|—0.79
1 —0.30|—0.32/—0.32|—0.55|—0.69 |—0.78 |—0.62|—0.67|—0.61|—0.43|—0.26|—0.18|—0.48

9.12.2.9 ||-0.40|—0.51|—0.82|—-1.44|—1.42/—1.36|—1.20|—1.51|—1.21|—-0.72) 0.43 -0.34|—0.95
|| 7 2.2(9) ||-0.04|-0.03)—-0.06) 0.03|—-0.01/—0.13|-0.04/—0.00) 0.05] 0.03) 0.05)—0.04|—0.02

1 Dia ext. ||—0.28

The numbers without sign must be added; those with the sign — must be subtracted

F o7

—0.34 —0.25'—0.02'—0.06'—0.04| 0.02'—0.14/—0.24!—0.28'—0.24|—0.18)—0.18

622

Betcium. — BrusseELs.

XLVIII.

Lat. 50° 51’N. Long. 4° 22’ KE. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

lr mt Tes an
Hour. Jan. | Feb. |March. April.| May. | June.| July. | Aug. | Sept. Oct. Nov Dec Year.
| |
Midn. 0.30} 0.60} 1.09) 1.72) 2.27) 2.46| 2.20] 1.88] 1.52) 0.92| 0.51] 0.30)| 1.31
2 0.56| 0.82; 1.39; 2.19) 3.00) 2.82) 2 eal oed 4) 2:03) 120) 1Oe7 MOST || wlievO)
4 | 0.64 0.97, 1.66) 2.64 3.32, 3.53| 3.14] 2.76; 2.388) 1.44] 0.83] 0.62]} 1.99
6 } 0.66] 1.03; 1.83] 2.43, 2.44) 2.27, 2.30} 2.44] 2.47) 1.56) 0.93] 0:63]/ 1.75
8 0.67| 0.84] 1.02| 0.76| 0.49 | 0.41| 0.32] 0.68] 1.03| 0.96] 0.79) 0.63|| 0.72
9 0.36) 0.33; 0.21 0.33 0.61 —0.61|—0.63 —0.39|—0.14| 0.07) 0.21) 0.34) 0.00
10 0.07 | —0.09 —0.54|/—1.18|—1.43 |—-1.32 —1.36 | —1.26 | —1.19 | —0.78 | —0.36 | —0.08 | —0.79
Noon. |; 70-92 | —1.27 —1.78 —2.42 —2.61 —2.47 |—2.35 | —2.47 | —2.46 | —1.87 | -1.27/ —0.83 (—1.89
2 | eds — 1-60 | —2.30 —2.95 (73.22 |—3.21 |—2.92 | —3.08 | -3.04 | —2.17 | —1.42 \—1.04 (2.35
‘4 —0.72 “1.19 —2.04 —2.63 3.15 —3.18 —2.90 —2.93 —2.70 |—1.61 | —0.90 —0.65 (2.05
6 ||—0.21 —0.49 | —0.94/—-1.71 —2.44'—2.57|—2.38 —1.87|—1.21 | —0.37 —0.28 |—0.18 |—1.22)
8 |—0.08 —0.05)—0.00| 0.13} 0.05|—0.16/—0.15| 0.17) 0.21} 0.23) 0.07/—0.03)| 0.03
9 | 0.13) 0.17) 0.31 0.63| 0.76| 0.80) 0.79| 0.76| 0.64} 0.43} 0.24) 0.07 | 0.48
10 0.20) 0.30} 0.58) 1.04] 1.25] 1.45) 1.39] 1.27] 1.01] 0.54] 0.38) 0.14 | 0.80
feats a eee teen |
Mean.|} 0.52| 2.45] 3.56| 7.27 10.37 | 13.10 | 13.69 | 13.58 | 11.22 | 7.69| 4.72] 1.89 |
XLIX.

GERMANY. — SCHWERIN.

Hour.

Mean.

Jan.

|—0.42
0.61
0.43
0.02
(0.07,
| 0.06

1.05

—0.97

Feb. | March.

0.49
0.69
0 83
0.86
1.19
0.18

0.92
1.20
1.43
1.62
1.24
—0.11

—1.32
—2.21
|—2.13
—0.42 —0.95
—0.07 —0.11

0.21) 0.45

—0.72 |
—1.22

—2.00| 1.18

Degrees of Reaumur.

April. | May.

1.97
2.44
2.96
2.07
0.56
—1.15

1.66
2G
2.53
2.67
0.98
—0.97

—2.34|
|—3.50)
| —2.86'
11.54
0.13,
1.01

—2.47
—3.38
—2.70
—1.62
0.11
1.15

5.26 | 8.45

June. | July.

2.12
2.72
2.96
1.94.
0.12
—1.26

2.10
2.69
2.97
1.80
0.25
—1.20

—2.20
—3.26
|—2.76 |
'—1.70
0.08
1.29

—2..36
—3.23
—2.62
—1.71
—0.02

1.28

12.19 13.50

Aug.

1.92
2.41
2.62
2.13
0.32
—-1.17

—2.29

|—3.45

—2.76
137
0.34
1.30

13.02

Sept.

1.70
2.19
2.54

0.95
—1.12

—2.42
—3.58
—3.03
—1.32
0.26
1.19

10.42

2.70 |

Oct.

0.87
1.14
1.51
1.67
1.21
—0.34

|—1.80
| 2.54
|-1.85
|—0.55
0.16
0.57

| 7.48

Lat. 53° 36’ N. Long. 11° 30’ E. Gr.— Dove.

Noy. | Dec.
0.21 0.16,
0.24) 0.34)
0.42 0.48,
0.62]. 0.48)
0.70, 0.63 |
0.01; 0.13)
—0.77 —0.43 |
0.91 |-0.68,
—0.62 | —0.62)
| —0.23 | —0.27 |,
0.02 -0.14)
0.24 | 0.02
1.42 |—1.38

'| Year.

1.18
1.53 |
1.79
1.55
0.73
—0.57

—1.65
—2.42
—1.97
—0.98),
0.06
0.73

F

The numbers without sign must be added; those with the sign — must be subtracted.

58

i
Prussta.— Mininavusen. Lat. 51° 13’/N. Long. 10° 27’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

623

The numbers without sign must be ad led; those with the sign — must be subtracted.

59

J
Hours. Jan. { Feb. |March.| April.| May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Mean.
Morn. 1 0.71} 1.28} 1.10] 1.84) 2.40) 3.56) 2.91) 2.49) 1.95| 1.39) 0.47] 0.58] 1.72 |
2 0.75] 1.30} 1.28] 2.19} 2.80} 3.97) 3.30) 2.80] 2.20) 1.65! 0.53) 0.59] 1.95
3 0.77| 1.33) 1.46) 2.40) 3.06) 4.16] 3.50} 3.06) 3.29} 1.85] 0.60} 0.60] 2.17
4 0.82} 1.40} 1.60) 2.74] 3.06} 3.98} 3.42] 3.14] 2.70] 1.99] 0.66] 0.62) 2.18
5 0.86] 1.47) 1.62] 2.61) 2.67) 3.40] 3.00) 2.98} 2.73} 2.05) 0.68) 0.66] 2.06
6 0.91} 1.50} 1.46) 2.25) 2.06) 2.49) 2.22) 2.51] 2.46] 1.93} 0.63) 0.67) 1.76
7 0.86} 1.36] 1.11) 1.41} 1.15) 1.32) 1.20] 1.73) 1.03] 1.50) 0.46) 0.59} 1.14
8 0.62} 0.98} 0.55) 0.58) 0.16} 0.11] 0.09} 0.86} 0.87) 0.84] 0.16) 0.46) 0.52
\
9 0.21} 0.33|—0.02|—0.38|—0.75/—1.02 |—0.97/—0.36/—0.26|—0.03|—0.22| 0.03/—0.29
10 ||-—0.38|—0.50|—0.70)/—1.16|—1.50|—1.98 |—1.82|—1.38|—1.40/—0.99|—0.62|—0.54/—1.08
11 ||—0.93|—1.35|—1.30|—1.97 |—2.06|—2.77 |—2.46 |—2.24|—2.42|—1.88|—0.92|—0.77|—1.76
Noon. . . ||—1.38/—2.02|—1.76|—2.42|—2.44|—3.39 |—2.94|—2.89|—3.14|/—2.53|—1.09|—1.06 |—2.26
1 ||-1.58|—2.38|—2.02/—2.80|—2.71/—3.86 |—3.26|—3.29|—3.52)—2.82|—1.08|—1.15|/—2.54
2 ||—1.52)—2.38|—2.07|—2.94|—2.87|—4.14|—-3.42|—3.46|—3.54|—2.99|—0.89|—1.10/—2.61 || -
3 ||—1.24|—2.07|—1.90|—2.85/—2.89|—4.13|—3-36 |—3.39|—3.23 |—2.48|—0.66|—0.81/—2.42
4 ~0.84/—1.56|—1.58 |—2.39 |—2.69|—3.78|—3.06 |—3.07 |—2.65|—1.89|—0.39 |—0.50/—2.03 |;
5 ||-0.44|—1.02|—1.11|—1.95|—2.19|—3.06 |—2.52 |—2.51|—1.89 |—1.21|—0.14/—0.23|—1.52
6 ||—0.20|—0.54|—0.62|—1.20|—1.59|/—2.10|—1.76|—1.76|—1.06|—0.58| 0.02/—0.02|—0.95
7 |\—0.04|—0.17|—0.18 |—0.47|—0.83 |—1.02/—0.85|—0.90/—0.24/—0.03} 0.06} 0.12|/—0.38
8 0.18} 0.13} 0.16} 0.09/—0.08} 0.05) 0.03|/—0.05| 0.50) 0.38] 0.22] 0.26) 0.16
9 0.27) 0.41) 0.45} 0.53) 0.58} 1.01) 0.81] 0.71} 0.99) 0.70} 0.26) 0.32] 0.59
10 0.37| 0.66) 0.64} 0.89) 1.10} 1.76] 1.46) 1.24} 1.35] 0.91] 0.34] 0.40} 0.93
11 0.53] 0.89) 0.78} 1.14] 1.56) 2.42) 2.01) 1.78] 1.58] 1.10} 0.38] 0.47] 1.22
Midn. . 0.64| 1.08) 0.94} 1.58] 1.98] 3.05) 3.29) 2.16] 1.75) 1.26] 0.42] 0.54] 1.56
6. 6 0.36] 0.48; 0.42) 0.53) 0.24) 0.20} 0.23) 0.38) 0.70) 0.68} 0.33] 0.33] 0.41
cane 0.41] 0.60) 0.47} 0.47] 0.16} 0.15} 0.18} 0.42) 0.40} 0.74] 0.26) 0.36] 0.38
8. 8 0.40) 0.56) 0.36] 0.34] 0.04} 0.08} 0.06) 0.41| 0.69) 0.61) 0.19] 0.36] 0.34
9.9 0.24| 0.37} 0.22} 0.08|—0.09/—0.01|—0.08; 0.18| 0.37] 0.34] 0.02). 0.18] 0.15
10.10 —0.01} 0.08|—0.03/—0.14|—0.20|—0.11|—0.18|—0.07|/—0.03/—0.04|—0.14|—0.07|—0.05
Wieneao —0.13|—0.20)/—0.17|—0.23 |—0.38|—0.60|—0.47 |—0.34|—0.51|—0.26|—0.06|—0.06/—0.29
6. 2. 8 —0.14|—0.25|—0.15|—0.20|—0.30/—0.53|—0.39 |—0.33/—0.19|—0.23|—0.01/—0.06|—0.23
6. 2.10 —0.08|—0.07| 0.01} 0.07) 0.10) 0.04} 0.09| 0.10) 0.09|—0.05| 0.03|/—0.01| 0.03
6. 2. 6 —0.27|—0.47|—0.41|—0.63 |—0.80)—1.25|—0.99 |—0.90|—0.71 |—0.55/—0.08|—0.15|/—0.60
VT 2 —0.33|—0.51|—0.48)/—0.77|—0.86|—1.41|—1.11 |—0.87 }—1.26|—0.75|—0.22 |—0.26|—0.74
Sa-a —0.45'!—0.70 |—0.76 |—1.18|—1.36|—2.02 |—1.67/—1.30/—1.34!—1.08|—0.37/|—0.32/—1.05
8. 1 —0.48|—0.70 | —0.74|—1.11|—1.28|—1.88|—1.59 |—1.22 —1.33|—0.99 |—0.46|—0.35|—1.01
ied —0.36|—0.51 |—0.46|—0.70|—0.78 —1.27 |—1.03 |—0.78' —1.25|—0.66|—0.31|—0.28|—0.70
9.12.3.9 —(054 —0.84'—-0.81 —1.28|—1.38)—1.88 |—1.62|—1.48|—1.41|—1.09 |—0.43|—0.38/—1.10
ds 2.2(9) —0.03|—0.05 —0.02|—0.12|—0.14/—0.20|—0.15|—0.08 —0.13!—0.02 0.02] 0.03|—0.07
Dail.ext. ||—0.34 —0.44'—0.23/—0.10) 0.09} 0.01| 0.04'—0.16 —0.13 —0.47'—0.21 0.241 -0.2 |

624

LI.

Hoiianp. — Urrecut. Lat. 52° 5’N. Long. 5° 8’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true

Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Reaumur.
Feb. | March.) April. | May. | June. | July. | Aug. | Sept. | Oct. Noy.
O62) CIS) Sole (2°56) 22742364) Sal.) 1 ON Oza OeaG
0.74/ 1.18) 1.87] 2.86) 3.29 2.67 1.91} 2.10} 1.11] 0.70
0282) 1-24)" 2500) + 3-00) 32200-2282 2302). 2.21) lS) aO00S
O:8715 W271 2-10) 3.02) (S225 2597) 22°07 |" 2534) 1250282.
0.90| 1.31] 2.16) 2.70| 2.84) 2.76) 2.06} 2.45) 1.381| 0.82
0.97| 1.26] 1.92} 1.80) 1.82] 1.86) 1.80] 2.42] 1.42} 0.90
0.98} 1.02} 1.80} 0.67] 0.44] 0.33) 1.05) 1.87) 1.22] 0.91
0.84) 0.62] 0.37)—0.38|—0.70|/—0.77| 0.04) 0.72} 0.39] 0.78
0.56 |—0.01 |—0.40 | -1.17 | —1.50 |—1.28 | —0.68 |—0.39| 0.12) 0.29
—0.07 |—0.53 |-1.20 —1.68 |—2.02 —1.69 -1.33 —1.12|—0.50|-0.22
—0.49 |—1.05 | —1.71 |—2.06 | —2.42 | —2.02 | —1.65 | —1.79 | —1.12 |—-0.71
—0.97 | —1.50 | —2.16 | —2.146 | —2.78 | —2.27 | —1.87 | —2.34 | —1.68 |—1.15
—1.34|—1.77 | —2.41 |—2.78 | —2.94 | —2.53 | —2.16| —2.83|—1.98 |—1.49
1658!) 1.88 —2.42 —2.94 —3.00 | —2.61 | —2.40 | —3.07 | —2.11 |—1.62
2 (71.02 |-1.54 | -1.82 | —2.42 | -2.88 | —2.94 | —2.60 | —2.30 | —2.99 | -1.99 |—-1.43
3 | —0.81|—1.21|—1.54 | —2.24 | =2.58 | —2.64 |—1.58 | —2.13 | —2.68 | —1.64 |—1.08 |
4 —0.60 | —0.89 | —1.25 | —1.82 | —2.06 | —2.20 | —2.00 | —1.79 | —2.06 | -1.10 | —0.70 |
5 —0.35 | —0.48 |—0.75 | —1.23 |—1.42 | —1.53 | —1.62 | —1.30| —1.34 | —0.52 |—0.42
6 | -0.19/-0.21/-0.24 | -0.47/—0.76 |—0.74 |—0.76 |—0.61 | -0.52 | —0.11 —0.18|—0.10| —0.41
7 |'-0.05|/—0.03| 0.14] 0.20] 0.07} 0.17] 0.02] 0.14] 0.10) 0.22 /—0.02 —0.03) 0.06
8 0.05) 0.12} 0.48] 0.72) 0.85} 1.01] 0.82] 0.86] 0.62} 0.53!) 0.18] 0.02]| 0.52
9 0.22} 0.23) 0.74) 1.13] 1.51) 1.77|-1.50} 1.24] 1.17) 0.84) 0.40) 0.06}: 0.90
10 0.36} 0.40] 0.94] 1.41] 1.92] 2.25] 1.96] 1.52] 1.51] 1.01] 0.58] 0.04| 1.16
11 0.36| 0.67] 1.02| 1.58] 2.16] 2.53] 2.17} 1.70| 1.76] 1.14] 1.06] 0.02]! 1.35
|Mean | —2.83| 4.18 | 3.20 | 7.14 | 10.55 | 12.95 13.75 12.90 10.87. 6.88 | 4.65 | 0.76 |!
LIT.
Encianp.—Greenwicu. Lat. 51° 28’ 38” N. Long. 0° 0'.— Dove.
Degrees of Reaumur.
teroure | Jan. Feb. ‘March. April. May. | June. July. | Aug. | Sept.-| Oct. | Nov. Dec. | Year.
|A-M.1|| 0.44) 0.75] 1.44| 2.82! 2.72) 8.24]. 2.73| 2.49] 2.05] 1.34| 0.67| 0.47|| 1.72
3)| 0.62} 0.94 1.66) 2.66) 3.04] 3.70] 3.11] 2.82) 2.40] 1.42} 0.80 0.56) 1.98
5 0.75| 1.06 1.92) 2.84| 2.84] 3.25] 2.91] 2.89] 2.58] 1.54] 0.87! 0.56); 2.00
7) 0.86] 1.08) 1.60 1.31| 0.75] 0.80]. 0.88| 1.22) 1.65) 1.26! 0.88/ 0.60|| 1.07
9}! 0.41} 0.24)—-0.22 —0.82 —1.30 —1.52 —1.14 —1.14 —0.76'—-0.30 0.11) 0.24] —0.50
11 || —0.74|—1.03 Tale dee =2;791 2:67 ce —1.06 —0.73 \—1.93
P.M. 1| -1.25|-1.73 -2.62 -3.31 -3.36 | —3.75|—3.17 -3.40 —3.28 —2.40 —1.64|—1.20| —2.59
3. —1.10'—1.59|—2.43 —3.08 | —3.02 —3.60 —3.09 | -3.20 —2.94 |—-2.04 —1.26 )/—0.85| —2.35
5||—0.36 —0.63 —1.33 —2.04 | —2.05 | -2.51|—2.24 —2.11 —1.65 |—0.73 |—0.38 |—0.24 | —1.37
7|| 0.03) 0.05; 0.09 —0.16 —0.29 | —0.58 —0.50'—0.11} 0.04) 0.11} 0.09| 0.00) —0.10
9|| 0.10; 0.32; 0.71) 0.99) 1.20] 1.40) 1.13 1.22} 0.89| 0.63] 0.40 0.21/) 0.77
11) 0.23) 0.54 1.11) 1.77| 2.06| 2.52} 2.08] 1.96| 1.60] 1.07} 0.53| 0.37], 1.33
| aroone| | sae ee Fea Toe [aca
|Mean.|| 2.48 | 2.53 | 4.53 | 6.71 | 9.62 | 12.47] 13.08 | 12.98) 11.12) 7.71 | 5.47 | 3.09 | |
The numbers without sign must be added ; those with the sign = must be subtracted.
F 60

LIL. 625
Encianp. — Greenwicu. Lat. 51° 29’N. Long. 0° 0’.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hours. Jan. | Feb. |March.] April. | May. | June. | July.

Morn. 1 0.38) 0.68} 1.29] 2.21) 2.72} 3.13] 2.61
0.63] 0.82! 1.44] 2.31] 2.85) 3.30) 2.71
0.83] 0.95} 1.62; 2.44) 2.91] 3.41] 2.74
0.93} 1.02} 1.82] 2.54] 2.85] 3.40) 2.71

em © bo

5 0.93] 1.03} 1.95) 2.46) 2.60] 3.14] 2.53) 2.81) 2.35] 1.56) 0.95) 0.62] 1.91
6 0.84! 0.97) 1.93] 2.17) 2.08! 2.52} 2.11) 2.48) 2.15] 1.42] 0.89) 0.60) 1.68
7 0.71| 0.84) 1.66) 1.56) 1.25] 1.53} 1.38) 1.77) 1.67| 1.15) 0.75) 0.57) 1.24
8 0.53] 0.61} 1.11) 0.66) 0.20] 0.28; 0.40) 0.72) 0.88] 0.71] 0.52) 0.48) 0.59

9 0.30| 0.26) 0.30/—0.37|—0.92)—1.02|—0.71|—0.55|—0.13} 0.09} 0.19] 0.28|/—0.19
10 ||—0.01|—0.20/—0.65|—1.43|—1.94)/—2.12/—1.73|—1.78|—1.23 |—0.66 |—0.26|—0.04|—1.01
11. ||—0.39|—0.75 |—1.60|—2.30 |—2.70|—2.89 |—2.51|—2.79 |—2.22|/—1.43|—0.77|/—0.46|—1.73

Noon. . . ||/—0.79|—1.27|—2.35 |—2.87 |—3.13|—3.28 | —2.94|—3.43 |—2.94 |—2.07|—1.25|/—0.87|—2.27
1 |'—1.12|—1.66|—2.79|—3.17/—3.26|—3.39|—3.04|—3.69 |—3.28 |—2.45/|—1.59 |—1.17|/—2.55
2 ||—1.28|—1.81|—2.85|—3.14|—3.16|—3.34 |—2.91 |—3.63|—3.23 |—2.48 |—1.69|—1.25 |—2.56 |
3 ||—1.21|—1.67|—2.57|—2.92|—2.90|—3.21|—2.67 |—3.34|—2.86 |—2.17|—1.51|—1.10|—2.34 |;
4 ||—0.95|—1.29|—2.05|—2.54|—2.54|—3.01|—2.38 |—2.89|—2.28/—1.63|—1.10|—0.76|—1.95

=0.58|—0.78 |—1.40|—1.97 |—2.06|—2.67 | —2.30 |—2.30|—1.60|—1.01 |—0.59 |—0.36 |—-1.45
—0.22|—0.26|—0.75|—1.34|—1.45 |—2.10|—1.57 |—1.56 |—0.91 |—0.43 |—0.10|—0.01|—0.89
0.03} 0.14/—0.17|—0.60|—0.71 |—1.26|—0.96 |—0.69|—0.27| 0.02] 0.24) -0.20)—0.34
0.11| 0.37] 0.30) 0.17| 0.11/—0.24|—0.19} 0.24) 0.29} 0.32] 0.41] 0.26] 0.18

art nu

9 0.08| 0.46] 0.65] 0.84} 0.92] 0.81} 0.64) 1.11) 0.77} 0.52) 0.44] 0.23) 0.62

10 0.03) 0.48} 0.89} 1.42] 1.62] 1.74) 1.41) 1.81) 1.17] 0.69] 0.41] 0.19] 0.99

11 0.04) 0.49] 1.05) 1.81] 2.16] 2.42) 2.01) 2.27) 1.47] 0.87) 0.40) 0.20) 1.27
Midn. . . |} 0.16) 0.56) 1.17) 2.03] 2.51) 2.86} 2.40} 2.51) 1.70] 1.08) 0.46] 0.28) 1.48

6. 6 0.31| 0.36] 0.59) 0.42) 0.31] 0.21} 0.27) 0.46] 0.62} 0.50] 0.39! 0.30) 0.40
(aioe 0.37| 0.49} 0.75) 0.48} 0.27! 0.13] 0.21} 0.54) 0.70} 0.59) 0.50] 0.38] 0.45
8.5 0.32] 0.49} 0.71] 0.42] 0.16] 0.02} 0.10) 0.48) 0.59) 0.52] 0.47] 0.37) 0.39
Oo 0.19} 0.36] 0.48] 0.24] 0.00|—0.10/—0.04) 0.28) 0.32} 0.31] 0.31] 0.25] 0.22
10.10 0.01) 0.14) 0.12'—0.00|—0.16|—0.19|/—0.16| 0.01|—0.03| 0.02) 0.08) 0.07|—0.01
7 2.9 ||—0.16|—0.17/—0.18)/—0.25 |—0.33|—0.33|—0.30|—0.25|—0.26|—0.27|—0.17|—0.15|—0.24
6. 2. 8 ||—0.11|—0.16)—0.21/—0.27/—0.32|—0.35)—0.33|—0.30|—0.26|—0.25|—0.13|—0.13|—0.24
6. 2.10 ||—0.14|/—0.12'—0.01} 0.15) 0.18} 0.31)—0.20| 0.22) 0.03/—0.12|—0.13|/—0.15) 0.04
6. 2. 6 ||—0.22|/—0.37|—0.56|—0.77|—0.84|—0.97|—0.79 |—0.90/—0.66 | —0.50|—0.30|—0.22/—0.59 ||
7. 2 —0.29/—0.49|—0.60 —0.79 |—0.96|—0.91|—0.77|—0.93|—-0.78 | —0.67|—0.47|—0.34/—0.67 ||
8. 2 —0.38|—0.60|—0.87|—1.24/—1.48|—1.53 |—1.26|/—1.46|—1.18|—0.89!|—0.59 |—0.39|—0.99
8. 1 —0.30,—0.53 /—0.84/—-1.26/—1.53|—1.56|—-1.31/—1.49|—1.20/—0.87 —0.54/—0.35/—0.98 |
deal —0.21|—0.41 |—0.57|—0.81 —1.01|—0.93 |—0.83 |—0.96|—0.81 —0.65|—0.42 —0.30|—0.66 |

9.12.3.9 |—0.41'—0.56'—0,99/—1.33|—1.51/—1.68 —1.42/—1.55|—-1.29 —0.91/—0.53 /—0.37/—1.05
7. 2.2(9) |-0.10/-0.01| 0.03] 0.03\—0.02 —0.05 —0.06) 0.09|-0.01/—0.07|—0.02 '—0.06 —0.02

Dail.ext. | —0.18/—0.39 —0.45'—0.32'-0.18) 0.01 —0.15'—0.42/—0.47/-0.44 —0.37 -0.32 —0.30

The numbers without sign must be added ; those with the sign — must be subtracted.

F 61

626

Hours. Jan. | Feb. | March.) April.

Midn

tO wo

wa

10
11

Noon...

w

TOO

ENGLAND. — GREENWICH.

1.0
0.9
1.2
1.3

1.6
1.8
1.9
1.9

1.5
1.0
0.2
=1.3

—2.3
a)
—3.0
—2.5

=—ile9)
—1.1
—0.6
—0.3

0.1
0.4
0.6
0.7

0.6
0.8
0.8

0.7
0.4
—0.2

(eo
—(o2
—0.6

—0.5
=O
== (er
=0°5

—0.8

1.6
1.8
2.0
2.1

2.3
2.2
2.3
2.1

1.6
0.7
—0.5
—2.1

—3.2
aco
aces
—3.6

—2.8
—1.6
—0.6

0.3

0.6
1.0
1.3
1.5

0.9
1.2
1.1

0.8
0.4
—0.3

—0.3
(Os
(ET

—0.9
—1.1
11
009

2.9
3.0
3.3
3.6

3.9
4.0
3.9
3.6

2.5
0.2
=I9
—3.5

—4.5
—3.3
—1.8
—0.4

0.9
1.7
2.3
2.6

1.0
1.6
1.7

0.9
0.2
—0.2

—0.3
0.1
— i?

Neill
—1.6
=1.6
—1.1

rela)

Degrees of Fabrenheit.

LIV.

Lat. 51° 29"N. Eong-0° 0!:

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. —GLaisHER.

4.8
5.2
5.7
6.2

6.6
6.7
6.0
4.3

2.0
—0.9
—3.2
—5.3

—6.8
——lteo)
—8.2
etd,

Oni,
—5.4
—3.5
—1.1

0.7
2.0
3.2
4.1

2
1.6
1.3

0.5
0.0
—0.6

—0.5
0.3
—1e9

—1.9
—3.1
—2-9
—1.8

—3.3

5.4
6.0
6.4
6.7

6.7
6.3
4.8
2.6

0.5
—2.0
—4.0
=5.5

=6:7
7.5
=lledl
—7.3

—6.1
—4.8
—3.0
—1.0

0.9
2.3

9
oO-«

4.5

0.9
0.8
0.7

0.1
—0.2
—(e9)

—0.7
0.2
—1.9

=2.5
—3.6
—3.5

—2.4

The nuinbers without sign must be added ; those with the sign — must be subtracted.

June.

6.2
7.1
8.0
8.7

9.3
8.8
6.4
3.0

0.0
—2.5
—4.5
—5.8

—7.3
—8.1
—8.6
OA.

—7.4
—6.1
—4.5
—2.4

0.0
1.8
3.6
5.0

0.9
0.3
0.0

—0.3
—0.4
—1.2

—0.7

0.5
—2.2
=—2:8
1.3
—4.0
—2.6

—4.1

62

July.

5.0
5.5
6.0
6.4

6.6
6.2
4.5
2.5

0.0
—2.0
—4.0
—5.4

—6.4
—6.7
—6.7
—6.5

—5.8
—4.9
—3.5
—1.5

0.3
Heo
3.3
4.2

0.5
0.5
0.1

—0.0
—0.4
—0.8

—0.6
0.4
1.9

—2.1
—3.3
—3.4
—2.1

—3.2

—6.5
—7.5
Teach
=O

—5.5
—3.6
—2.0
—0.5

1.0
2.4
3.3
4.3

1.7
1.4
0.9

0.4
—0.1
=O eM,

—0.4
0.3
—1.4

—2.2
—3.4
—3.3
—2.1

—3.2

2.1
—0.4
—3.0

—5.0

—6.4
=e)
7.1
—6.6

—5.5
—4.2
—2.5
—0.6

1.0
1.8
2.7
3.4

1.4
1.7
1.5

0.7
—0.1
—0:4

2.9
3.0
3.4
3.6

3.8
3.8
3.5
2.8

1.6
0.0
—2.0
—3.8

—5.1
—5.5
—4.9
—3.7
—2.8
lio
—0.8

0.0

0.7
1.3
1.9
2.4

1.3
1.4
1.1

0.6
—0.0
=0.2

—0.2
0.2

2.0
2.0

2.1
2.0
1.9
1.7

1.0
0.4
—0.6
—2.0

—3.1
—3.5
—3.6
—3.0

—2.1
—1.2
—0.4

0.1

0.6
1.0
1.3
1.5

0.8
0.9
0.8

0.7
0.4
—0.3

—0.4
—0.1

1.2
1.3

1.4
1.4
1.4
1.5

1.3
0.9
0.0
-1.3

Del
—2.4
—2.3
129

—1.3
—0.8
—0.4
—0.1

0.2
0.4
0.5
0.8

0.5
0.7
0.8

0.6
0.2
—0.1

—0.2
Oeil

4.2
4.5

4.5
4.7
3.9
2.8

1.2
—0.5
—2.2
oso)

—5.1
ill
—5.8
—5.3

—4.4
—3.2
—2.0
—0.6

0.6
1.5
2.3
2.9 |

0.9
1.1
0.9

0.5
0.0
—0.5

—0.4 |;
0.1

i

LV. 627
Prussia. — Harte. Lat. 51° 30’/N. Long. 11° 57’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Jan. | Feb |March.| April. | May. | June. | July. | Aug: | Sept. | Oct. | Nov. | Dec. | Mean.

Morn. 1 0.53) 1.00) 1.36) 2.52} 3.98] 3.91) 3.72) 3.32] 2.70) 2.01) 0.95) 0.46] 2.21
2 0.56) 1.14) 1.58} 2.86] 4.10) 3.94) 3.82) 3.57| 2.99) 2.22) 0.97] 0.48] 2.35
3 0.60) 1.26) 1.74) 3.00] 3.78) 3.62) 3.56) 3.56) 3.12) 2.37) 1.01] 0.50| 2.34
4 0.66) 1.34) 1.82] 2.94] 3.10) 2.95) 2.97] 3.27) 3.02) 2.41] 1.03] 0.54] 2.17

5 0.72} 1.36) 1.72] 2.62) 2.18) 2.09} 2.14) 2.64] 2.62) 2.25) 1.00) 0.55) 1.82
6 0.72] 1.30) 1.42) 1.98} 1.30) 1.18] 1:24) 1.90) 1.97) 1.90) 0.92) 0.58) 1.37
7 0.65} 1.10) 0.94] 1.07} 0.32] 0.25] 0.23) 0.84) 0.98] 1.32) 0.74] 0.55) 0.75
8 0.36! 0.53) 0.20) 0.03|—0.56|—0.58/—0.57|—0.20| 0.12] 0.33] 0.30! 0.28] 0.02

9 0.05/—0.08 |—0.66 |—0.98 |—1.34!—1.34|—1.30|—1.20|—1.14|—0.71|—0.31 |—0.09 |-0.76
10 ||—0.45|—0.76|—1.18 }—1.86 |—2.09|—2.01|—1.99|—2.10)—2.03|—1.66|—0.87|—0.54|—1.46

11 |/—0.82)—1.29 —1.73 }—2.58 |—2.66 |—2.68 |—2.65 |—2.90|—2.72|—2.44|—1.35|—0.90 /—2.06
Noon. . . ||—1.09|—1.77!—2.06|—3.08 |—3.14|—3.07|—3.16 |—3.35|—3.11 |—2.86|—1.66 |—1.08 |—2.45

—1.17|—2.02)—2.22|—3.32|—3.33 |—3.35 |—3.46 |—3.53|—3.30/—-3.01|—1.73 |—1.09 |—2.63
—1.06|—1.86)/—2.10)/—3.26 |—3.37|—3.46 |—3.54 |—3.57|—3.27 |—2.76|—1.52 |—0.94|—2.56
—0.86 |—1.49|—1.86 |—2.90|—3.13 /—3.23|—3.29 |—3.30|/—2.98 |—2.32 |—1.14|—0.74|—2.27
—0.53|—1.01/—1.42|—2.39 |—2.74|—2.74|—2.76 |—2.84|—2.50|/—1.81 |—0.75|—0.42 |—1.83

me ON

—0.30|—0.59|—0.91|—1.78|—2.24|/—2.22|—2.16/—1.97/—1.83 |—1.20/—0.40/—0.20|—1.32
—0.13/—0.29|—0.52/—0.96|—1.58|—1.50/—1.39 |—1.38|—1.12|—0.69 |—0.14|/—0.03|—0.81 ||
—0.00)|—0.09|—0.06 |—0.34/—0.86|—0.73|—0.55 |—0.59 |—0,38/—0.21| 0.04| 0.09/—0.31

0.11] 0.13} 0.26] 0.32/-0.10) 0.07} 0.26] 0.15] 0.29] 0.25] 0.21| 0.22/—0.18

aran

a 0.21) 0.30) 0.59} 0.88) 0.68) 0.90} 1.09} 0.90) 0.87| 0.68) 0.39] 0.34] 0.65

10 0:31) 0:46) 0:79) 1-33) 1-64) 1-81) (1°87) 1-61) 1.42) 1512) 0:59) 0.37) V1

11 0.41] 0.65} 0.98} 1.78] 2.61) 2.69) 2.64] 2.30) 1.90) 1.47] 0.76) 0.40] 1.55
Midn. . .|| 0.48} 0.83} 1.16] 2.17) 3.43] 3.42] 3.29] 2.86) 2.33] 1.77| 0.89} 0.43} 1.92

6. 6 0.21} 0.39| 0.41} 0.42|—0.03|—0.07/—0.01| 0.34) 0.40) 0.53] 0.30) 0.18] 0.26 |
ond 0.30) 0.51) 0.45} 0.51/—0.14|—0.16/—0.08| 0.26] 0.43] 0.61] 0.39) 0.28) 0.28
8. § 0.33) 0.51] 0.44) 0.37\—0.27/—0.24/—0.16} 0.13] 0.30] 0.56) 0.39] 0.32] 0.22

9: 9 0.24) 0.33] 0.23) 0.18/—0.33|/—0.26|—0.16/—0.03| 0.21} 0.29) 0.26} 0.25) 0.10
10.10 0.13] 0.11)—0.04/—0.05|—0.33 |—0.22|—0.11 |—0.15/—0.14|/—0.02| 0.04} 0.13|—0.05

7.2.9 |/—0.11/-0.20|-0.18/—0.34/—0.71|—0.70|—0.65 |—0.49 /|—0.35|—0.29|—-0.20!—0.10!—0.36
6. 2, 8 ||-0.15 —0.25 —0.19 0.35 —0.67 —0.66|—0.62 —0.49 —0.35 —-0.32/—0.23 /-0.15 —0.37
6. 2.10 ||-0.08|—0.12) 0.03) 0.06/—0.16/—0.12/-0.08'—0.00) 0.06 —0.03!—0.11/-0.07 —0.05
6. 2. 6 ||—0.25 —0.42/—0.47/-0.83/—1.13 —1.16|—1.16 —0.95 |—0.84'—0.65|—0.38/-0.25 —0.71

%. 2 —0.23 |—0.36 —0.40|—0.67|—1.02/—1.09 |—1.11 |—0.82 —0.67 —0.56'—0.41 —0.26 —0.63
8. 2 —0.26|—0.46 —0.64|/—1.13|—1.51|—1.55|—1.62|—1.35 —1.16 —0.85'—0.50'—0.27 —0.94
8.1 —0.22!—0.34/—0.56|—1.01|/—1.41|—1.41|—1.47|—1.26)/—1.07|—0.77/—0.46|—0.27 |—0.85
ide

—0.19|—0.24)/—0.32)—0.55|—0.92 |—0.95 |—0.96 —0.73 |—0.57|—0.48 |—0.37 |—0.25|—0.54

9.12.3.9 | —0.35 —0.62 —0.84/-1.37 —1.67/-1.66 /—1.63'—1.63'—1.40 —1.16 —0.59|—0.34/—1.10 |
7. 2.2(9) |-0.06 —0.12'—0.07|—0.18)—0.56 —0.51|—0.43 —0.33 —0.19 —0.15'—0.10/—0.02

|
ae =

||_Dail.ext. |-0.23'—.33/-0.20'-0.16| 0.37] 0.24 0.14) 0.00 —0.09'-0.30 —0.35|—0.26

The numbers without sign must be added ; those with the sign — must be subtracted.

F 63

628

Hanover. — GOTTINGEN.

LVI.

Lat. 51° 32' N. Long. 9° 56’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hours.

Morn. 1

me Ww bo

Noon...

em OO be

nae aa

Midn...

SERN
Ccomontkn

_
om ©

Car CeCe
o

SS

co CO
raise
mm bo pb

7.

9.12.3.9 |
7. 2.2(9)

| Dail. ext.

FE

Jan.

0.90
0.92
0.94
0.99

1.15
1.12
1.13
1.12

0.50
—0.37
—1.26
—1.85

—2.02
—2.03
—1.74
—1.23

0.79
—0.33
—0.05

0.24

0.40
0.57
0.71
0.88

0.40
0.54
0.68
0.45
0.10

—0.17
—0.22
—0.11
—0.41

—0.45
—0.46
—0.45
—0.45

—0.67
—0.03

—0.44

Feb.

1.13
1.14
1.16
1.20

1.26
1.20
1.14
0.80

—0.08
—0.88
—1.78
—2.17

—2.32
—2.23
—1.98
—1.35

—0.59
—0.04
0.31
0.58

0.82
0.94
1.01
1.07

0.58
0.73
0.69
0.37
0.03

—0.09
—0.15
—0.03
—0.36

=A) SEE)
—0.72
—0.76
—0.59

—0.85
0.14

—0.53)

March.

1.58
1.77
2.01
2.22

2.29
2.10
1.77
1.02

—0.14
—1.09
accu
—2.43

—2.81
—3.05
—2.88
—2.48

alo
—1.06
—0.26

0.34

0.78
1.05
1.30
1.54

0.52
0.76
0.68
0.32
-0.02

—O ali
—0.20

0.03
—0.67

—0.64
—1.02

—0.90!

—0.52

—1-17
0.07

—0.38

April.

2.24
2.49
2.79
3.04

3.08
2.73
2.24
0.89

—0.16
—1.32
—2.30
—2.98

—3.37
—3.56
—3.48
—3.24

—2.64
—1.86
—0.80

0.04

0.77
1.30
1.75
2.11

0.44
0.72
0.47
0.31
—0.01

—0.18
—0.26

0.16
—0.90

—0.66
—1.34
—1.24
=0:57

—1.46
0.06

-0.24

May.

3.31
3.70
3.93
3.91

3.55
2.62
1.78
0.75

—0.47
—1.53
a OU,
—3.30

—3.82
—3.98
—3.95
—3.67

—3.13
—2.40
—1.44

0.22

0.88
1.59

2.29
2.52

0.11
0.17
0.27
0.21
0.03

—0.44
—0.53

0.08
—1.25

—1.10
—1.62
—1.54

|—1.02

—1.71
—0.11

June.

3.43
3.71
3.73
3.57

3.10
2.22
1.21
0.49

—0.55
—1.60
—2.53

—3.19

—3.72
—4.03
ooo
—3.65

—3.09
2020
—1.16
—0.15

0.79
1.73
2.69
8.01

0.01
0.03
0.17
0.12
0.07

—0.68
—0.65
—0.03
—1.34

—1.41
—1.77
—1.62
—1.26

—1.72
—0.31

\—0.03|—0.15

0.10
0.05
0.26
0.22
—Oelg

=0:53
—0.49

0.12
—1.30

—1.35
=1-3]
—1.65
—1.19

—ls10
—0.13

—0.09

3.35
3.70
3.92
3.89

3.52
2.79
1.69
0.56

—0.68
—1.84
—2.83
—3.52

—3.82
—4.15
—4.03
—3.71

—3.15
—2.32
—1.09

0.13

1.05
1.62
2.26
2.93

0.24
0.30
0.35
0.19
—(Oo1 1

—0.47
—0.41

0.09
— 23

—1-23
—1.80
—1.63
—=1.07

—1.80
—0.09

—0.12

Sept.

2.31
2.68
3.23
3.63

3.62
3.50
2.62
1.36

—0.22
—1.45
—2.45
—3.37

—3.80
—4.00
—4.03
—3.62

—2.94
—1.97
—0.87

0.05

0.78
1.28
1.71
2.00

0.77
0.88
0.71
0.28
—0.09

—0.20
—0.15

0.26
—0.82

—0.69
—1.32
—1.22
—0.59

ll
0.05

—0.20

1.58
1.08

—0.21
—0.82
—1.74
—2.50

—2.89
ee
—2.84
—2.40

1.74
—0.94
—0.30

0.24

0.71
1.02
1.35
1.44

0.53
0.64
0.66
0.25
0.10

—0.23
0.25

0.01
—0.64

—0.70
|—0.95
—0.91
—0.66

—1.21
0.01

|—0.42

Nov.

0.69
0.74
0.82
0.92

1.00
1.08
0.94
0.53

0.10
—0.42
= O6O9
—1.46

—1-58
—1.60
—1.32
—0.90

—0.54
—0.23
0.01
0.17

0.30
0.42
0.56
0.62

0.43
0.48
0.35
0.20
—0.00

—0.12
—0.12
—0.03
—0.25

—0.33
—0.54
—0.53
—0.32

—0.60
—0.02

—0.26

The numbers without sign must be added ; those with the sign — must be subtracted.

64

Dec.

9.58
0.58

0.62
0.66
0.65
0.54

0.30)
—0.02
—0.74
—1.12

—1.42
—1.28)
—1.02
—0.66

—0.36
—0.14
0.06
0.20

0.30
0.40
0.44
0.56

0.26
0.36
0.57
0.30
0.19

—0.11
—0.14
—0.07
—0.25

—0.32)
—0.37)
—0.44
—0.39}

—0.39

0.59)

}

Mean.

0.60) 2.06

2.25
2.41
2.49

2.39
2.05
1.51
0.80

—0.19
—1.13
a eo9
—2.61

—2.95
—3.08
—2.93
—2.56

—2.00
—1.32
—0.57

0.14

0.72
1.15
1.56
1.22

0.37
0.47
0.47
0.27
0.01

—0.28
—0.30

0.04
Ooo

—0:79
—1.14
—1.07
—0.72

—1.25

—0.01

:

i

'-0.38 —0.30

—0.03 |

;
i
}
;

LVI.
Lat. 52° 30’ N. Long. 13° 24’ E. Greenw.

629
Prussia. — BERLIN.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hour. || Jan. | Feb. |March.| April. | May. | June.| July. | Aug. | Sept. | Oct. | Nov Dec. || Year.
Midnight. | 0.34) 0.59| 0.90] 1.78} 2.21] 2.15] 1.78] 1.52] 1.50] 0.95| 0.44] 0.34|| 1.21
1 0.43| 0.78| 1.13] 2.22] 3.23] 2.80} 2.52] 2.53) 1.99] 1.48] 0.59] 0.37|| 1.67
2 0.49| 0.97) 1.388) 2.56) 3.83) 3.38] 3.06) 3.05] 2.41) 1.95] 0.68} 0.43 2.02 |
3 0.54) 1.09] 1.64} 2.41] 4.00) 3.46| 3.28) 3.15) 2.76) 2.31] 0.73] 0.46]| 2.15
4 0.58 | 1.25| 1.85] 3.03) 3.77) 3.18] 3.12] 3.40| 2.94] 2.45/] 0.79} 0.52 | 2.24)
5 0.65] 1.37] 1.97) 3.05| 3.16) 2.59] 2.67| 3.16| 2.89| 2.32] 0.84] 0.56 | 2.10)
6 0.73) 1.39) 1.92] 2.69} 3.23) 1.78) 1.92] 2.57) 2.56) 1.52) 0.84] 0.71 dinates
a 0.75| 1.18] 1.62} 2.01) 1.43) 0.94) 1.18] 1.83) 2.03} 1.15] 0.65; 0.63)| 1.21
8 0.62) 0.89! 1.14) 0.94} 0.42) 0.41) 0.44] 0.75] 1.03] 0.62] 0.56} 0.60|! 0.70)
9 0.41| 0.49} 0.44 —0.17 |—0.65 —0.40 |—0.35 |—0.36 |—0.09 |-0.04| 0.35] 0.38] 0.00
10 0.19 |—0.09 |—0.25 1.08 |-1.47 |-1.14 |—1.15 |—1.27 |—0.81 |—0.81 |-0.09 0.05 | —0.66
11 —0.30 |—0.66 |—1.02 —1.78 |—2.20 —1.72 |—1.78 |—2.07 |—1.90 |—1.46 |—0.55 |—0.36 | —1.32
Noon. |—0.55 |—1.16 |-1.44 —2.37 |-2.65 —2.17 |—2.26 |—2.64 |—2.49 |—1.87 |—0.95 |—0.69 =1.77
1 ||—0.93 —1.48 |-1.97 —2.85 |—3.00 |—2.25 |—2.54 |—3.06 |—2.96 |—2.14 |—1.26 |—0.86 | —2.11
2 71-07 —1.73 |—2.20 2.98 —3.25 -2.72 —2.75 |—-3.17 |—3.16 |—2.23 |-1.27 |—0.96| —2.29
3 || —1.03 |-1.67 |—2.28 —3.27 |-3.34 —2.84 —2.82 |—3.25 |-3.19 |—2.12 |—1.20 |—0.95 | —2.32
| | |
4 ||—0.78 —1.46 |—2.07'—3.11 |-3.11 —2.72 —2.73 |-3.14 |—3.16 |-1.75 |—0.81 |—0.73 | —2.13
5 || ~0.56 |—1.07 —1.70 —2.57 —2.69 —2.60 |—2.40 |—2.72 |-2.34 |-1.53 —0.49 |\—0.48 | —1.76
6 —0.338 —0.74 —1.12 —2.05 —2.35 —2.36 —2.16 |—2.21 |—1.58 |—0.87 |—0.30 |—0.25| —1.36
7 || —0.22 |—0.416 —0.64 \—1.13 caren ae Laer —1.22 qe —0.63 |—0.11 —0.15| —0.84
8 0.12 —0.20 —0.27 —0.34 —0.67 0.57 —0.39 —0.30 —0.16 |—0.30| 0.05 |—0.02 | —0.27
9 0.06! 0.03| 0.05) 0.40 0.18 0.31| 0.38] 0.84) 0.36 /—0.08} 0.10) 0.06) 0.22
10 | 0.14! 0.21 0.39) 0.93) 0.82) 0.96, 1.01 1.06 | 0.98! 0.26! 0.20; 0.17!) 0.59
11 0.24/ 0.38) 0.65) 1.37) 1.56) 1.58} 1.44 1.57) 1.20) 0.56] 0.36 0.25, 0.93
|
6, 6 0.17| 0.32} 0.40) 0.32 —0.06 |—0.31 |—0.12)] 0.19] 0.49} 0.32} 0.27} 0.23)] 0.10
ana: 0.27! 0.36) 0.49) 0.44 /—0.06 —0.40 |-0.13/| 0.30) 0.60) 0.26) 0.27) 0.24)) 0.22
8,8 0.25| 0.35| 0.44) 0.30 —0.08'|—0.08| 0.03] 0.23] 0.44! 0.16) 0.26) 0.29)| 0.13
9, 9 0.24] 0.26) 0.30) 0.12} 0.21|/-0.05| 0.02} 0.24 |—0.23 —0.06| 0.23| 0.22) 0.12
10, 10 | 0.17| 0.06| 0.07 |—0.08 —0.33 |—0.09 |—0.07 |—0.11 |—0.09 |-0.28 | 0.06| 0.11]| 0.05
aged: |—0.09 —0.15 —0.17 |—0.42 —0.79 —0.65 |—0.68 —0.61 |—0.46 |—0.49 —0.31 |—0.12 | 0.42
Fai 25.9 | 9.09 —0.17 —0.18 —0.19 |—0.56 |—0.49 |—0.36 |—0.17 |—0.26 |—0.39 —0.17 —0.09 |—0.26)
6, 2, 10 |—0.07/—0.04| 0.04) 0.21 —0.07-—-0.01) 0.06] 0.15| 0.13 |—0.15 —0.08 —0.03 | —0.07
Daily ext. |-0.16 -0.17 -0.16 -0.11| 0.33) 0.31) 0.23] 0.08 —0.13] 0.11 —0.22 0.13) 0.00
| i
| 3

F

The numbers without sign must be added ; those with the sign — must be subtracted.

65

630 LVI.

GERMANY. — SauzuFLen. Lat. 52° 5’N. Long. 8° 40’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

July. | Aug. | Sept. | Oct. | Nov.

2.41) 2.57) 2.05) 1.71) 2.12] 1.24] 0.90) 0.31
2.93) 2.85) 2.27) 2.01] 2.44] 1.55) 1.26) 0.48
3.29] 2.98] 2.39} 2.23) 2.74) 1.82) 1.53) 0.65)-
3.37|. 2.86) 2.32} 2.26| 2.87) 1.98) 1.64) 0.78

3.08} 2.47) 1.99} 2.00) 2.71) 1.97) 1.58) 0.83
2.41} 1.83) 1.42] 1.48] 2.18] 1.75] 1.37) 0.79
1.45] 1.02) 0.70} 0.79) 1.34] 1.34] 1.04] 0.64] 0.94
0.38] 0.15|—0.06} 0.08} 0.30) 0.75) 0.62) 0.38] 0.31

—1.42|—1.38|—1.15|—1.02|—1.47|—0.63|—0.35|—0.24|—0.88
—1.96|—1.94|—1.62|—1.38 |—2.08|—1.27|—-0.02|—0.48|—1.29
—2.31|—2.39|—1.90|—1.72|—2.41|—1.78|—1.18|—0.62|—1.70

—2.53|—2.72|—2.13]—2.03 |—2.75|—2.09|—1.48|—0.64/—1.93
—2.66|—2.91|/—2.30|—2.30|—2.90|/—2.18|—1.56|—0.58 |—2.03
—2.72|—2.92|—2.36|—2.42|—2.90|/—2.06|—1.46|—0.50|—1.98 |
—2.65|—2.71|—2.24|—2.30|—2.70|—1.76|—1.22|—0.41|—1.78
|
|

-77|—2.39 | —2.26|—1.89|—1.87 |—2.25|—1.34|—0.92|—0.35 |—1.43
-22)/—1.94|—1.62|—1.32|—1.22|—1.55|—0.90|—0.65|—0.32|—0.99

2)/-1.34|—0.86/—0.62| 0.47|/—0.71|—0.47/—0.44|—0.30|—0.51
—0.65|—0.09} 0.09) 0.21) 0.12)—0.11|/—0.31/—0.27/—0.06

\
|
|
|
|
|
|
—0.59|—0.67|/—0.74|—0.54|—0.65| 0.09} 0.14) 0.06/—0.31
|

0.04} 0.62} 0.70) 0.71] 0.81} 0.18}—0.20)/—0.21) 0.34 |;
0.68) 1.22) 1.26) 1.03} 1.30] 0.42/—0.06/—0.12|) 0.67
1.27| 1.74) 1.52] 1.25) 1.61] 0.66} 0.18] 0.01] 0.94 |.
1.84] 2.18} 1.80} 1.45} 1.86] 0.94) 0.50) 0.15) 1.22

6. 6 0.25) 0.25) 0.29) 0.24] 0.11] 0.05] 0.13] 0.32) 0.43} 0.36) 0.24] 0.24
diet) 0.26] 0.29) 0.28] 0.22] 0.06] 0.08] 0.04} 0.16} 0.32] 0.44] 0.30} 0.17) 0.22
8. 8 0.20} 0.26] 0.22} 0.08/—0.14] 0.03} 0.02} 0.15] 0.21| 0.32] 0.16] 0.06] 0.13
O59 0.11} 0.16} 0.12}—0.08|—0.28|—0.03/—0.02} 0.09} 0.08) 0.14)/—0.03/—0.08} 0.02
10.10 —0.06| 0.01/—0.03|—0.21/—0.37/—0.08} 0.06} 0.01/—0.09|—0.11|/—0.21/—0.18|—0.11

7. 2. 9 |/—0.10'—0.22|—0.17/—0.36|—0.39|—0.42/—0 30|—0.27|—0.25/—0.22|—0.24/—0.05|—0.25
6. 2. 8 |/—0.08 —0.21/—0.13/—0.28|—0.30|—0.39 /—0.26|/—0.20/—0.20|—0.18|—0.17|—0.02/—0 20
6. 2.10 |/—0.04/-0.06} 0.01] 0.05] 0.14) 0.05) 0.13] 0.07| 0.19|—0.00|-0.08| 0.03} 0.04
6. 2. 6 . |/—0.14)—0.41/—0.38 |—-0.67|—0.73 |—0.90|—0.73|—0.68|—0.76|—0.44|—0.28)—0.04|—0.51

2 —0.22)/—0.50|—0.48 | —0.78 |—0.61|—0.95 |—0.80| —0.76|—0.78|—0.42/—0.26| 0.03/—0.54
2 —0.32|—0.67|—0.70|—1.20|—1.14|—1.38 |—1.18|—1.11|—1-30]—0.72|—0.47|—0.10/—0.86 |!
1
1

—0.35|—0.64|/—0.67/—1.17/—1.08 |—1.29|}—1.10|—0.98 |—1.23/—0.67/—0.43/—0.13|—0.81
—0.25 |—0.47|—0.45 |—0.75 |—0.54|—0.85 |—0.72|—0.62 |—0.71/—0.38 |—0.22|—0.00|—0.50
j !
|
—0.37|—0.67|—0.68 |—1.24|—1.40|—1.34/—1.08|/—0.99/—1.29|—0.89|—0.68 —0.32/-0.91 |
—0.04|—0.08 |-0.01/—0.15|—0.28|—0.16/—0.05|—0.02] 0.02|—0.12/—0.23/—0.09|—0.10 |
1

9.12.3.9
7. 2.2(9)

Dail. ext.

—0.15|—0.24|—0.14] 0.02] 0.33] 0.03] 0.0: 0.10)}—0.02

The numbers without sign must be added; those with the sign — must be subtracted.

F 66

ae ae

LIX. 65
Prussia. —Stettin. Lat. 58° 25'N. Long. 14° 34’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and-of the Year. — Dove.

Degrees of Reaumur.

| |
Hour. Jan. | Feb March. | April. May. June. July. | Aug. | Sept. | Oct. Noy. Dec. |: Year. |
———— — —_ —— :
Midnight. | 0.26 0.54| 0.98) 1.66| 2-21] 2.21, 1.83] 1.93] 1.53! 0.88! 0.50] 0.39) 1.24)
| 1 || 0.38, 0.59] 1.17| 1.91] 2.66] 2.46| 2.25] 2.24] 1.61] 1.01] 0.44) 0.46] 1-43 |
| 2 0.43; 0.70] 1.30) 2.15) 3.03] 2.84] 2.62] 2.54| 1.87) 1.13] 0.47| 0.50) 1 63!
3 | 0-49, 0.88) 1-41) 2.39) 3.39) 3.10) 2.95) 2.83) 2.11) 1.24) 0.51) 0.56 1.99
| IHecall |
4 | 0.53, 0.89) 1.51) 2.60] 3.58] 3.08] 3.07) 3.08) 2.33) 1.33) 0.55) 0.61) 1.92
5 0.57; 0.97) 1.63! 2.67) 3.45] 2.78] 2.85) 3:10] 2.46/ 1.40] 0.58; 0.64} 1.92)
6 || 0.55! 0.94] 1.62 2.40] 2.78} 2.12] 2.21| 2.78] 2.45] 1.42] 0.60] 0.56] 1.70]
7 | 0.46: 0.83} 1.37, 1.70] 1.63) 1.17| 1:31] 2.02] 1.98] 1.25) 0.52] 0.46) 1.23
i |
| | |
S | 0.36; 0.66! 0.90. 0.65) 0.33 0.20) 0.35, 0.96) 1.11| 0.79) 0.43} 0.38) 0.59
9 || 0.22) 0.36] 0.23 -0.42 —0.88 —0.72 —0.53 —0.26'—0.05| 0.16| 0.13) 0.23'—0.18
10 | —0.04'—0.02/—-0.44 —1.36 |-1.87 —1.54 —1.83 —1.40/-1.11 —0.55 —0.22'—0.03|—0 83/|
11 | -0.36 0.53 -1.06 ~2.07 |-2.62 —2.18 —1.96 —2.23 1.96 -1-23 —0.60\—0.35 |—1.43
i | j
| rate|
Noon, —0.63 —0.93 |-1.59 —2.50 —3.09 —2.59 —2.46 —2.93 —2.58 —1.68 -0.90 —0.64 —1.88
1 |-0.81 =1.26 -1.92 —2.80 3.36 —2.90 —2.81 -3.38 —2.88 -1.98 —1.06 —0. 86,—2.17|
2 | -0.90|-1.39 2.08 -2.94 —3.50 -2.99 -2.99 —3.50 —2.99 —2.06 1.06 —0.94 /—2.28
3 —0.78 1.34 -2.06 2.84 ,-3.35 —2.90 —2.80 —3.38 —2.82 -1.88 —0.94 -0.86 -2.16 |
4 | oes -1.15 -1.81 -2.54 —2.99 -2.99 —2.60 —3.03 -2.44 —1.43 —0.68 —0.70 -1.92/)
5 | -0.41/-0.83 1.43 —2.02'—-2.46 —2.46 '—2.15 —2.40|-1.85 |-0.99 0.39 |-0.48 | —1.19!|
6 -0.25 -0.46 -0.90 —1.32 -1.74 -1.74 -1.62 -1.68 -1.14 —0.46 —0.19 —0.30 —0.98
7 |-0.11 0.23 —0.40 —0.55 —0.89 —0.89 —0.93 -0.78 —0.52 —0.10 —0.00 -0.18,—0.46
| | | i
s | 0.01 -0.01-0.02' 0.10 ~9.14'-0.14!-0.17' 0.02! 0.06! 0.17! 0.18 0.06 0.00)
9 0.08| 0.16! 0.32) 0.68| 0.73! 0.73| 0.48 0.74) 0.60] 0.39] 0.20| 0.07!) 0.31]
10 ‘|; 0.20! 0.30! 0.61, 1.10! 1-30, 1.30, 1.03 1.20 1.00! 0.58! 0.43! 0.22!) 0.77]|
11 ‘(|| (0.25) 0.42) 0.79! 1.42) 1.76 1.76! 1.47) 1.60, 1.31| 0.74] 0.50; 0.32} 1.03!
| | |
| | pre | |
6,6 | 0.15] 0.24] 0.36] 0.54] 0.52) 0.19: 0.29) 0.55 0.65, 0.48, 0.21, 0.13 0.36 |
1,7 0.17) 0.30, 0.48) 0.57) 0.37) 0.14 0.19) 0.62) 0.73, 0.57) 0.26, 0.14, 0.38)
8,5 |, 0.19] 0.51! 0.44) 0.38: 0.10) 0.03, 0.09) 0.19) 0.59) 0.48 0.31 0.16 0 0.30) |
9,9 0.15) 0.26) 0.28| 0.13 0.08) 0.01 ae 0.24) 0.28, 0.28) 0.22) 0.15, 0.16),
10,10 |, 0.08; 0.14) 0.09 —0.13 -0.29'—0.12 =0.15 -0.10 0.06 0.02) 0.11 0.10 —0.03),
7,1 | —0.17/-0.21'-0.67'-0.55 —0.86 —0.86 —0.75 '-0.65 —0.15 —0.36 —0.27 —0.20 —0.50 |
7, 2,9 | -0.13 —0.13 —0.13 -0.19 —0.33 —0.36 —0.40'-0.25 0.14 —0.14 —0.08 —0.14 —0.21||
6, 2, 10 1 0.05 0.05, 0.38, mau ae 0.14| 0.08 | 0.16 0.15 —0.02 —0. ite | 0.09
| \ ! | | { |
Daily meen 0.23 aa 0.0 0.06; 0.04 oe 0.27 -0.32 0.23 —0.15 roa
i : ! : | | i

The numbers without sign must be added: those with the siga — must be subtracted.

F 67

632 LX.

Steswick. — APENRADE. Lat. 55° 3’ N. Long. 9° 25’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hours. Jan. Feb. |March.; April. | May. | June. | July. | Aug. | Sept. | Oct. :

Morn. 1 0.26] 0.69} 0.98] 1.73; 3.18] 3.82) 2.50) 2.61] 2.16] 1.06
0.31; 0.78) 1.14]; 1.83) 3.17] 3.90} 2.38) 2.66] 2.29} 1.19
0.38} 0.79} 1.26] 1.98} 3.02) 3.82) 2.13) 2.66] 2.54] 1.30
0.42} 0.75] 1.34] 2.10] 2.71] 3.50) 1.78] 2.64] 2.62] 1.37] 0.66] 0.38| 1.69

we W bo

0.44) 0.69} 1.31] 2.02] 2.22) 2.89) 1.35] 2.18] 2.43; 1.36] 0.69} 0.40) 1.50
0.50} 0.62} 1.18] 1.63} 1.54] 1.94] 0.86) 1.56] 2.02) 1.25] 0.69) 0.40] 1.18
0.47} 0.54) 0.90; 1.15} 0.70! 0.83} 0.30} 0.77] 1.18] 0.97! 0.61] 0.37] 0.73

mtn o

0.39} 0.38] 0.50} 0.41/—0.23)—-0.34/—0.29|—0.18] 0.18} 0.52) 0.42) 0.27| 0.17

©

0.23) 0.10|/—0.02|—0.42|—1.14|—1.38|—0.87)—1.10/—0.83|—0.10} 0.10) 0.10|—0.44

10 ||—0.06|—0.32|—0.66|—1.22|—1.90|—2.16)—1.40|—1.98|—1.71|—0.79/—0.30)—0.15/—1.00

11 ||—0.36|—0.78 | —1.15|—1.90|—2.49|—2.66|—1.80|—2.42|—2.38|—1.38|—0.68}—0.43/—1.41

Noon. . . ||—0.62/—1.19|—1.62|—2.42|—2.86]—2.98 | —-2.09|—2.74|—2.79|—1.94|/—0.98/—0.66|—1.91
|
|
|
|
|
|
|

—0.78|—1.40|/—1.90|—2.75 |—3.08 | -3.24|—2.23|—2.89 |—3.03|—2.15|—1.10/—0.78|—2.11
—0.69|—1.34/—1.96|—2.39 |—3.16|—3.49 |—2.27| —2.90|—3.08 |—2.07|/—1.02/—0.75|—2.14
2.21|—2.78|—2.93|—1.74|—0.82|—0.59 |—2.01
2.0

2|—2.39 |—2.54|—1.23/—0.59|—0.38|—1.71

—0.61/—1.06|—1.78|—2.79|—3.10|/—3. 68 |—2
—0.38 |—0.64/—1.41)/—2.43|—2.86|—3.62|—2.

me 0 bo

—0.16|—0.23|—0.92|—1.80|—2.40)—-3.34|—1.70|—2.02|/—1.93|—0.71|—0.29|—0.15|—1.30
—0.03| 0.05|/—0.42)/—0.99)/—1.70|—2.57/—1.18]—1.23|—1.13|—0.25|—0.12} 0.02|—0.80

0.01} 0.18] 0.02/—0.12|—0.79|—1.42|—0.57|—0.47|/—0.26] 0.10) 0.02) 0.10/—0.27
| 0.03| 0.18} 0.33) 0.66) 0.22|/—0.07| 0.18] 0.40] 0.56} 0.34] 0.03] 0.14} 0.25

artnanw

|
|
-21} 1.21] 0.51} 0.09} 0.15] 0.71

wo

0.01; 0.17) 0.54} 1.25) 1.22 5 1
10 0.02] 0.22) 0.66] 1.57) 2.05) 2.33 1.72] 1.61} 0.65) 0.18} 0.18} 1.07
11 0.07) 0.33) 0:76) 1.69) 2.66; 3.10} 2.14] 2.25) 1.83) 0.85) 0.30

7 1

Midn.-. . |} 0.15} 0.52) 0.86) 1.70; 3.02) 3.5 -68) 1.97; 0.92; 0.42

6. 6 0.24] 0.34] 0.38} 0.32|—0.08/—0.32/—0.16] 0.17] 0.45) 0.50! 0.29
eG 0.24; 0.36) 0.46) 0.52/—0.05|—0.30|/—0.14) 0.15} 0.46} 0.54) 0.30
8. 8 0.21| 0.28 0.42) 0.54|—0.01/—0.21/—0.06} 0.11} 0.37) 0.43] 0.23
9.79 0.11} 0.14) 0.26) 0.42) 0.04)—0.07| 0.05] 0.06) 0.19} 0.21] 0.10
10.10 —0.02|—0.05|-0.00) 0.18) 0.08; 0.09} 0.12|—0.13|/—0.05|/—0.07|—0.06
7. 2. 9 ||—-0.08|—0.21|—0.17/—0.16!—0.41/—0.47|—0.33|—0.31|—0.23|—0.20|—0.11
6. 2. 8 ||—0.05/—0.18|—0.15 |—0.20|—0.47|—0.54| —0.41/—0.31|—0.17|—0.16|—0.10
6. 2.10 ||—0.06|/—0.17|—0.04; 0.10) 0.14) 0.26] 0.07; 0.13] 0.18/—0.06|—0.05
6. 2. 6 ||—0.07|/—0.22|—0.40|—0.75|—1.11|—1.37|—0 86|—0.86|—0.73|—0.36|—0.15

—0.11|-0.40 |—0.53 —0.87/—1.23|—-1.33/—0.99 —1.07|-0.95|-0.55)—0.21
—0.15|—0.48 0.73 1.24 -1.70|—1.92|-1.28|—1.54/-1.45|/—0.78 | —0.30
—0.20 0.51, -0.70 -1.17/-1.66 —1.79 —1.26|—1.54|—1.43|—0.82/-0.34
—0.16)—0.43/-0.50 —0.80 —1.19 —1.21|—0.97/-1.06)—0.93|—0.59|—0.25

Dow
— Se bh

9.12.3.9 ||-—0.25/-0.50|/—0.72/-1.10 /-1.47|—1.70|-1.05/—-1.35|-1.34|—-0.82) -0.40
7. 2.2(9) ||-0-06)-0.12| 0.01] 0.19) 0.01)-0.04/-0.01| 0.07/ 0.13|~0.02)—0.06

Dail.ext. ||—0.14/—0.31|—0.31'—0.40) 0.01; 0.11) 0.12|—0.12|—0.23'—0.39|—0.21
reser SSS US| liber I 4

The numbers without sign must be added ; those with the sign — must be subtracted.

F 68

LXI. 633
Scottanp. — Leirx. Lat. 55°59’ N. Long. 3° 10’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Fahrenheit.

March.| April. | May. | June. | July.

| Morn. 1 0.38} 0.86) 1.76] 3.02} 3.04) 3.29) 4.10) 2.95/ 2.54! 1.10] 1.26] 0.72 |
0.61| 0.77; 1.98) 3.92) 3.47) 3.62] 4.28] 3.20] 2.77] 1.19] 1.53) 0.65! 2.33 ||
0.68} 0.77) 2.41} 4.57] 3.96) 3.74] 4.66) 3.49} 3.29] 1.31] 1.40] 0.61) 2.57
|
]
|
1
J

mw be

0.95| 0.95) 2.59) 5.31} 4.41) 3.98] 5.11) 3.71} 3.65] 1.33] 1.46) 0.70| 2.84

1.06; 1.37! 2.75] 5.49] 4.28] 3.94) 4.59) 3.65) 3.78] 1.62] 1.37] 0.77| 2.87
1.06) 1.31) 2.78) 5.36) 3.51] 3.04) 3.56) 3.26) 3.51] 2.03) 1.28} 0.59] 2.61
0.97} 1.24) 2.48) 3.47] 2.66) 2.25) 2.39) 2.25] 2.75) 1.62] 1.06) 0.68] 1.98
0.88} 1-26} 1.80) 2.18) 1.40) 1.10) 1.15} 1.08} 1.46} 0.97) 1.04} 0.54) 1.24

art an

9 0.61) 0.77) 0.81|—0.27) 0.11|/—0.18|—0.23/—0.50|—0.14| 0.32) 0.56] 0.32} 0.18

10 0.16/—0.07| 0.18|—2.00|—1.06|—1.31|—1.37|—1.26|—1.10|—0.83|—0.34|—0.02 —0.75

11 ||-0.34|—0.97)—1.22|—3.02 |—2.00|—2.30|—2.25|—2.03 |—2.21 |—1.71|—1.33|—0.86|—1.69
Noon. . : ||—1-04/—1.69|—2.61|—3.92|—2.75 |—2.79| —3.58 | —2.99 |—3.13 |—2.36|—1.96|—1.33|—2.51

—1.42|—2.25|/—2.97|—4.37/—3.35|—3.15|—3.67|—3.44)—3.92|—2.79|—2.30|—1.51|—2.93
—1.58|—2.23|—3.29|—4.73|—3.78 |—3.83|—4.07 |—3.65 |—4.28 | —2.84 |—2.57|—1.55 |—3.20
—1.60|—2.27|—3.38|—5.09|—3.85|—4.37|—4.37|—3.65 |—4.16 |—2.57|—2.63|—-1.13 |—3.26
—1.19|—1.73|—3.33|—4.79 |—4.19|—3.94|—4.46 | -3.87|—3.56|—1.96|—1.69 |—0.83 |—2.96

m Oh =

5 ||-0.68|—0.95 |—2.84)/—4.25/—4.03|—-3.71|—4.57|—3.76| -3.56 |—1.31 |—1.04/—0.50 —2.60

6 ||-0.45|-0.47|-2.14|-3.83 |-3.51|—3.29 /-4.41|-3.47/—2.30|—0.59 |—0.68 —0.27|-2.12

7 ||-0.09|—0.09|-1.17|-2.45/—2.61|—-2.52/—3.58/-1.69/-0.97| 0.05 —0.25| 0.18|—1.27

8 || 0.14) 0.32|/—0.45|-0.81/-1.17/—0.79/—-1.31|-0.41/—0.16 0.59] 0.05) 0.29/-0.31

9 || 0.23] 0.61] 0.25] 0.38) 0.32] 0.50] 0.43] 0.59] 0.59| 0.72] 0.32] 0.36] 0.44

| 10 |] 0.18] 0.88) 0.77) 1.08] 0.86] 1.89] 1.71] 1.58] 1.24) 1.15] 0.79] 0.41) 1.04
11 |} 0.32] 0.99) 1.31] 2.18} 1.69] 2.16] 2.52] 2.23] 1.67] 1.60| 1.19] 0.54] 1.53
Midn. . .|| 0-38) 1.01) 1.44] 2.68] 2.32) 2.68] 3.44/ 2.77] 2.27| 1.49] 1.42] 0.59] 1.87
6.6 || 0.82| 0.43] 0.34] 0.77) 0.00/-0.14]—0.43|-0.11| 0.61) 0.72] 0.32] 0.16) 0.25
7.7 || 0.45) 0.59) 0.65] 0.52] 0.02/-0.14|-0.61| 0.29| 0.90) 0.83] 0.41] 0.43] 0.36
8.8 || 0.52) 0.79) 0.68) 0.70) 0.11] 0.16|-0.09| 0.34] 0.65] 0.79| 0.54] 0.43] 0.47
9.9 || 0.43] 0.70] 0.54) 0.07] 0.23] 0.16] 0.11] 0.05] 0.23) 0.52] 0.45] 0.34) 0.32
10.10 || 0.18] 0.41] 0.47/-0.47|-0.11| 0.29} 0.18] 0.16] 0.07] 0.16} 0.23] 0.20] 0.15
7. 2.9 ||-0.14|-0.14|-0.18|-0.29 —0.27|-0.36/—0.43/—0.27|—-0.32|—0.16 —0.41/—0.18/—0.26
6. 2. 8 ||-0.14/-0.20|-0.32|-0.07|-0.47 —0.52)—0.61 |—0.27/—0.32|-0.07 —0.41/—0.23|—0.30
6. 2.10 | -0.11|-0.02| 0.09) 0.56) 0.20) 0.36] 0.41] 0.41) 0.16] 0.11/—0.16/—-0.18) 0.15
6. 2. 6 ||-0.32)—0.47|—-0.88 |—-1.06|—1.26 —1.35/—-1.64|—1.28|—1.01|—0.47|-0.65|—0.41|—0.90
2 —0.32)—0.50|—0.41/—0.63 —0.56|—0.79 —0.86 —0.70|—0.77|—0.61|—0.77/—0.45 —0.61
8. 2 —0.36/—0.50|—0.74|—1.28 -1.19 /—1.37|-1.46 —1.28|/-1.42/—0.95|-0.77/-0.52 —0.99
8.1 —0.27|—0.50 —0.59 -1.10 —0.99 -1.04|-1.26 —1.19]-1.24|-0.92)—0.63|—0.50 —0.85
71 —0.23/—0.52|—0-25|—0.45 —0.36 —0.45 —0.65 —0.61 0.59 —0.59/—-0.63|—0.41 —0.47
9.12.3.9 ||—0.45|—-0.65|-1.24|-2.23|—1.55/-1-71|-1.94|-1.64|-1.71 —0.97|—0.92 —0.45/—1.29
7. 2.2(9) | -0.05} 0.07 /-0.09 —0.14|-0.14 —0.16|—0.20|—0.07\-0.09) 0.07|-0.23 —0.05 0.09
Dail.ext. ||—0.27/-0.49 0.29) 0.20/-0.11 -0.20) 0.27/-0.09 '—0.25'-0.40 -0.56 —.40 —0.20

The numbers without sign must be added ; those with the sign — must be subtracted.

F 69

6°4 UXT.
Scottanp. — Leitu. Lat. 55° 59’ N. Long. 3° 10’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Morn. 1 0.17} 0.38; 0.78) 1.34] 1.35) 1.46) 1.82} 1.31) 1.13] 0.49] 0.56] 0.32] 0.93
0.27| 0.34] 0.88, 1.74/ 1.54] 1.61] 1.90) 1.42] 1.23] 0.53) 0.68) 0.29) 1.04
0.30} 0.34] 1.07) 2-03) 1.76] 1.66) 2.07) 1.55] 1.46] 0.58) 0.62! 0.27/ 1.14
0.42) 0.42] 1.15! 2.36] 1.96) 1.77) 2.27) 1.65] 1.62) 0.59) 0.65] 0.31) 1.26

Hours. Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept. | Oct. ; Nov. | Dec. —
|

m OW bo

0.47| 0.52] 1.22) 2.44) 1.90] 1.75) 2.04] 1.62] 1.68) 0.72] 0.61] 0.34] 1.28
0.47| 0.58] 1.24) 2.38) 1.56| 1.35) 1.58) 1.45|} 1.56} 0.90} 0.57) 0.26) 1.16
0.43] 0.55] 1.10) 1.54] 1.18} 1.00} 1.06) 1.00} 1.22) 0.72] 0.47] 0.30] 0.88
0.39] 0.56) 0.80} 0.97) 0.62] 0.19) 0.51) 0.48} 0.65] 0.43] 0.46} 0.24) 0.55

antan

9 0.27} 0.34} 0.36|—0.12| 0.05|—0.08|—0.10|/—0.22|—0.06| 0.14) 0.25] 0.14} 0.08

10 0.07|-0.03) 0.08|—0.89 —0.47|—0.58 —0.61 —0.56|—0.49 —0.37|—0.15|—0.01 /—0.33

11 |/-0.15/—0.43|—-0.54/—1.34|/—0.89 |—1.02)—1.00|—0.90 |—0.98 —0.76|—0.59 |—0.38 |—0.75
Noon. . . ||—0.46|/—0.75|—1.16|—1.74/—1.22 |—1.24|—1.59|—1.33 |—1.39|—1.05 —0.87 —0.59|/—1.12

1 ||—0.63/—1.00|/—1.32|—1.94|—1.49 |—1.40|—1.63|—1.53/—1.74|—1.24|—1.02|—0.67/—1.30
2 ||-0.70|—0.99|—1.46|—2.10|—1.68|—1.70|/—1.81|—1.62|—1.90)/—1.26|—1.14/—0.69 |—1.42
3 ||-0.71|/—1.01|—1.50|—2.26/—1.71|—1.94|—1.94 | —1.62|—-1.85/—1.14|-1.17/—0.50 | —1.45
4 ||—0.53|—0.77|—1.48|—2.13|—1.86|—1.75|—1.98 |—1.72|—1.58 |—0.87|—0.75|—0.37|—1.32
5 ||—0.30|—0.42|—-1.26|—1.89|—1.79 |—1.65/—2.03!—1.67|—1.58 |—0.58|—0.46 |—0.22|—1.15
6 ||—0.20|—0.21 —0.95|—1.70|—1.56 —1.46|—1.96 | —1.54|—1.02|—0.26 —0.30|—0.12 —0.94
7 ||—0.04|—0.04|—0.52|—1.09|—1.16|/—1.12|—1.59|—0.75|/—0.43| 0.02/—0.11| 0.08|/—0.56
8 0.06| 0.14|/—0.20)—0.36|—0.52/—0.35|—0.58|—0.18|/—0.07| 0.26} 0.02) 0.13|—0.14

9 0.10] 0.27} 0.11) 0.17) 0.14} 0.22) 0.19} 0.26] 0.26) 6.32} 0.14/ 0.16) 0.20

10 0.08} 0.39) 0.34] 0.48} 0.88) 0.84) 0.76] 0.70) 0.55) 0.51) 0.35) 0.18] 0.46

11 0.14] 0.44] 0.58} 0.97] 0.75} 0.96) 1.12) 0.99} 0.74] 0.71) 0.53] 0.24] 0.68
Midn. . . || 0.17} 0.45} 0.64) 1.19} 1.03} 1.19) 1.53] 1.23] 1.01] 0.66) 0.63) 0.26] 0.83

6 0.14) 0.19} 0.15} 0.34) 0.00|—0.06/—0.19|—0.05) 0.27) 0.32] 0.14| 0.07) 0.11
7 0.20) 0.26} 0.29] 0.23] 0.01/—0.06/—0.27| 0.13} 0.40} 0.37] 0.18] 0.19] 0.16
8. 8 0.23] 0.35) 0.30} 0.31) 0.05) 0.07)—0.04; 0.15) 0.29) 0.35) 0.24] 0.19} 0.21
9 0.19] 0.31} 0.24) 0.03} 0.10} 0.07) 0.05) 0.02} 0.10} 0.23} 0.20) 0.15] 0.14
10.10 0.08] 0.18} 0.21/—0.21)/—0.05| 0.13} 0.08) 0.07; 0.03] 0.07; 0.10} 0.09| 0.06

7.2.9 ||-0.06/-0.06 —0.08|-0.13|—0.12 0.16 —0.19/—0.12)—0.14|-0.07|—0.18|—0.08 —0.12
6. 2.8 ||-0.06 —0.09 —0.14|/—-0.03/-0.21 |—0.23| -0.27 —-0.12|—0.14/—0.03 /—0.18|—0.10 —0.13
6. 2.10 |/-0.05 0.01} 0.04) 0.25} 0.09) 0.16) 0.18) 0.18} 0.07, 0.05|—0.07|-0.08| 0.07
6. 2.6 ||-0.14/—-0.21/-0.39 —0.47 0.56 —0.60 —0.73 —0.57|—0.45 —0.21|—0.29/—0.18/—0.40
Tie? —0.14/—0.22/—0.18/—0.28/—0.25 —0.35 —0.38/—0.31|—0.34/—-0.27|—-0.34|—0.20/—0.27
8. 2 —0.16|—0.22|—0.33|—0.57|—0.53 |—0.61|—0.65|—0.57|—0.63|—0.42/—0.34|-0.23|—-0.44
8.1 —0.12|-0.22/—0.26 —0.49 —0.44/-0.46 —0.56 —0.53 —0.55 /—0.41 —0.28 —0.22/—0.38
ol —0.10|—0.23|—0.11|-0.20 —-0.16|—0.20 —0.29|-0.27 0.26 \—0.26 —0.28 —0.18 —0.21

9.12.3.9 ||—0.20|/—0.29|—0.55|—0.99 |—0.69 |—0.76 |—0.86 |—0.73 |—0.76 , —0.43|—0.41|—0.20|—0.57
7. 2.2(9) —0.02} 0.03)—0.04|/—0.06 |—0.06 |—0.07|—0.09 |—0.03 |—0.04 hal ie —0.02/—-0.04

Dail. ext. |/—0.12/—0.22'—0.13} 0.09; 0.05'—0.09| 0.12/—0.04/—0.11 —0.18 —0.25 —0.18 —0.09 !
‘ TE A A Beh AE BES oS ee ey

The numbers without sign must be added ; those with the sign — must be subtracted.

i 70

ScotLanp. — MAkERSTOUN.

LX.

Lat. 55°. 36’ N.. Long. 2° 31! W. Gr.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
-Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

635

Hour. Jan. | Feb. | March.) April. | May. | June. | July. | Aug. Sept. | Oct. Noy. | Dec. Year. ||
| aaa
Midn. || 0.67| 0.88| 1.24| 2.30] 2.00) 2.25] 2.10/ 1.98| 1.95] 0.88| 0.46/ 0.24) 1.41
1 || 0.76] 0.92) 1.37] 2.52) 2.04) 2.43| 2.44] 2.24] 2.15] 0.88] 0.46] 0.16) 1.53)
2 | 0.78} 1.08) 1.37) 2.70) 2.33) 2.54| 2.57| 2.38] 2.26) 1.06] 0.60) 0.18) 1.65)
3 || 0.76] 1.06] 1.48} 2.79| 2.55] 2.65] 2.79) 2.56] 2.35| 1.57| 0.60] 0.29) 1.79)
4 || 0.67| 1.01] 1.66] 2.96] 2.51) 2.43| 2.70] 2.56| 2.48] 1.20] 0.68) 0.40] 1.77)
5 || 0.78] 0.92; 1.77| 2.88] 2.06] 1.96| 2.21] 2.44} 2.46] 1.40| 0.60 0.44) 1.66)
6 | 0.60] 0.85] 1.78] 2.25] 1.31] 1.12] 1.85| 1.78| 2.22] 1.81| 0.66 0.51| 1.31)
7 | 0.51} 0.99] 1.26] 1.43] 0.48] 0.32] 0.46| 0.91; 1.24] 1.26] 0.66 0.44) 0.83)
8 | 0.53) 0.79} 0.46) 0.36|—0.25|—0.51 |—0.39|—-0.09 | 0.00| 0.62) 0.66) 0.40) 0.22
9 | 9.33} 0.08|-0.33|-0.79|-0.94/-1.11 —0.96 —1.02 -1.00)—-0.16} 0.08) 0.22 —0.47)
10 |-0.22|—0.72|—1.12|—1.86 | —1.52|—1.68 |—1.59 |—1.78 | —1.92 | —0.96 | —0.47 | —0.20 | —1.17
11 |-0.84 =1.21|—1.67|—2.55 |—2.09 | -2.26 |-2.14 —2.33 |-2.45 | —-1.63/—0.94 —0.62 —1.73
Noon. | —1.36'—1.61 |—2.09 |—3.06 |—2.34|-2.48 |-2.45 ,-2.73 | -2.67 —2.03 | 1.34 —0.93 —2.09|
1 |-1.71|—2.03 —2 27) —3.44|—2.69 |—-2.75 |—2.48 | -2.87 | -3.03 | —2.25 | -1.56 | —1.13 | —2.35
2 || -1.67)-2.05 | 2.36 |-3.57|—-2.65 —2.57 |-2.52 —-2.93 | —3.12|—2.20|—1.47 —0.96 -2.34
3 _| —1.29|—1.68 |—2.32 | 3.52 | —2.65 | —2.28 |—-2.54 |—2.73 | -2.85|—1.83 | —0.96 ,—0.60!|—2.10,
4 | -0.71|-1.30 —1.80|—3.05 |-2.27 —1.95 |—2.28 | -2.47 |—2.29 —1.23/—0.45 —0.16 —1.66
5 |/-0.13|—0.50 | -1.20 rahe hae —1.81|—1.78 | —1.49 |—0.49 |—0.07 —0.11) —1.11)
6 | 0.18|—0.08 —0.40|—1.39|—0.98 |—0.95 |—1.34 | -1.07 |—0.60|—0.09} 0.13) 0.18 —0.53,
7 | 0.29) 0.15) 0.08 —0.19 —0.18 —0.40 —0.59 —0.18 | 0.06) 0.17 ONT 0.18 —0.04
8 | 0.31) 0.87) 0.46) 0.52) 0.62) 0.36) 0.35) 0.56 | 0.46) 0.40; 0.28, 0.18 0.41

| | |
9 | 0.29) 0.52) 0.73) 1.21) 1.15) 1.00] 0.95| 1.09) 0.95) 0.64 0.37) 0.24. 0.76
10 | 0.27| 0.64) 0.95) 1.74] 1.46] 1.56| 1.48] 1.58] 1.33) 0.73; 0.46; 0.31; 1.04
11 || 0.22| 0.79] 1.06) 2.08] 1.77| 1.94] 1.70! 1.89| 1.51] 0.73] 0.40] 0.36.) 1.20,
\Mean.| 1.53 | 0.35 | 2.06 | 5.96 | 6.86 10.25 10.12 |10.00 | 8.51 | 6.64 | 4.60 | 1.16 | |
LXIV. |

TreLanp. — Dusuin. Lat. 53° 23'N. Long. 6° 20’ W. Gr. — Dove.
Degrees of Reaumur. |
Hour. | Jan. | Feb. | March. | April. | May. | June. | July. | Aug. Sept. | Oct. | Nov. | Dec. Year. |
a.m.1| 0.58] 0.53| 1.56| 2.18] 2.53| 2.76| 2.18| 2.22| 1.64| 1.16| 0.53) 0.36 || 1.52
3| 0.80| 0.71] 1.64] 2.40) 2.89| 3.11] 2.53| 2.40) 1.87| 1.42| 0.67| 0.49 || 1.74)
5) 0-93} 0.98) 1.64) 2.49) 2.31) 2.18) 2.18) 2.53) 1.87) 1.73) 0.76) 0.58 | 1.68)
7| 0.84| 0.93] 1.38] 0.58|—0.22)—0.89 —0.36| 0.40} 1.07) 1.56) 0.80, 0.53 || 0.56:
9| 0.36] 0.18|—0.31|—1.11|—1.24!—1.38 |—1.10 | —1.16|—0.76 |—0.09| 0.27) 0.36 | -0.50,
11 |—0.98 | —0.07 | —1.82| —2.40|—2.18 re ee ae 2.13} —1.91 |—0.98 |—0.71 || —1-71)|
| |
P.M.1 —1.60/—1.78 | -2.67 —2.93/-2.62/—2.40 —2.27 -2.62 -2.67 -2.44 -1.56/-1.16 | -2.23 |
3 |—1.33'—1.47|—2.44|—2.84|—2.71 |—2.31 | -2.27 |—2 49 | -2.22 —2.04|—1.11 |—0.67 ||—-1.99|
| | | |
5 —0.44) 0.44)/—1.29)—1.82|—1.82 |-1.87 -1.64 | —1.73 |—1.29 —0.84|—0.27)—0.18 |) —1.14,
7| 0.09 0.18) 0.18] 0.04 —0.27 -0.44 —0.27 -0.09| 0.27, 0.04) 0.04) 0.09 0.01
9 | 0.22: 0.31) 0.76] 1.20} 1.29] 1.24) 1.20) 1.16] 0.93, 0.58| 0.36] 0.18 0.79
11 | 0.36, 0.40) 1.07) 1.73, 1.96] 2.04) 1.87) 1.64| 1.42; 084) 0.44] 0.22 1.17
Mean. | 4.09 | 4.75 | 5.10 | 6.66 | 9.51 | 11.86] 12.48 12.31/ 10.79 7.73 | 599 | 4.88 |

The numbers without sign must be added; those with the sign — must be subtracted.

71

F

636 LXV.
Russia. — CaTHarinenBurc. Lat. 56° 50’N. Long. 60° 34’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

May. | June. } July.

©

0.91} 1.84] 1.97} 3.09} 3.69] 3.51) 2.49) 1.99} 0.68) 0.47
0.89} 2.09) 2.41) 3.52) 4.15] 3.76] 2.93] 2.27) 0.84) 0.42
0.87| 2.42) 2.87] 3.80) 4.35) 3.96) 3.42] 2.60) 1.04] 0.36
8} 0.89} 2.80} 3.21) 3.82) 4.17) 4.01] 3.78] 2.89) 1.23) 0.35

S S exe e
aay
wD

He Or Or
w

0.58} 0.95| 3.11) 3.23) 3.45) 3.54) 3.78] 3.79) 2.98) 1.36) 0.43
0.54) 1.00} 3.15} 2.83} 2.67] 2.49) 3.18] 3.30) 2.74] 1.36) 0.55
0.60) 0.94) 2.76) 1.99). 1.57] 1.18] 2.21] 2.29) 2.11) 1.17) 0:64) 0.81) 1.52
0.56) 0.71} 1.90} 0.84] 0.31] 0.17] 0.98} 0.94; 1.16} 0.80} 0.60} 0.80; 0.79

0.37} 0.27) 0.65|—0.41/—0.88|—1.35|—0.34|—0.48] 0.05} 0.28) 0.37) 0.61/—0.07
—0.01)—0.33|—0.75 |—1.52|—1.85 |—2.23|—1.61/—1.70/—1.03|—0.32|—0.02| 0.21/—0.93
—0.60|—0.97|—2.03 |—2.34|—2.53 |—2.79 |—2.72|—2.55|—1.93|/—0.89|—0.49 |—0.34/—1.68
—0.98|—1.47|—3.00|—2.83 |—2.98 |—3.13 |—3.64 |—3.03 | —2.58 |—1.34|—0.89|—0.90/—2.23

—1.30|—1.75|—3.52|—3.04|—3.25 |—3.35 |—4.33 |—3.25|—2.98 |—1.62|—1.12|—1.32|—2.57
—1.37|—1.77|—3.62|—3.03|—3.41 |—3.50|—4.78 |—3.34|—3.16|—1.69 |—1.13|—1.50|—2.69
—1.19)/—1.55|—3.39 |—2.88 |—3.46 |—3.56|—4.90|—3.36|—3.17/—1.58|—0.95|—1.40|—2.62
—0.84|/—1.19|—2.96 |—2.60|—3.33 |—3.46|—4.62 |—3.27|—2.98 | —1.31/—0.66 |—1.10|—2.36

—0.34|—0.79 |—2.40|—2.18|—2.95|—3.09 |—-3.90 |—2.98 |—2.57|—0.96 | —0.37 |—0.73|—1.94
—0.11/—0.42|—1.77|—1.61|—2.29 |—2.43 |—2.77|/—2.39|—1.93|—0.58|—0.14 |—0.39|—1.40
0.11|—0.10}—1.08 |—0.92|—1.41|—1.52|—1.39|—1.53|—1.12|—0.23] 0.01/—0.14|/—0.78
0.22} 0.17) 0.36|/—0.22/—0.42|—0.48] 0.03|—0.53|—0.26| 0.06} 0.12] 0.03} 0.14

0.30) 0.42} 0.32] 0.42) 0.53) 0.56) 1.28] 0.43} 0.52) 0.26] 0.22] 0.15) 0.45
0.37| 0.63} 0.90} 0.91) 1.35) 1.51) 2.22) 1.20) 1.13} 0.40} 0.83} 0.28) 0.95
0.36} 0.80) 1.32) 1.29] 2.03) 2.35] 2.84) 1.74] 1.52] 0.48] 0.42] 0.43] 1.30
0.55} 0.89] 1.62} 1.61) 2.59} 3.07) 3.23) 2.12] 1.77) 0.56) 0.48) 0.57) 1.59

0.21} 0.27) 0.69] 0.61) 0.19} 0.03) 0.20) 0.45) 0.40} 0.39] 0.21] 0.17) 0.32
0.35} 0.42) 0.84} 0.53) 0.08|—0.17) 0.41] 0.38) 0.49] 0.47) 0.33! 0.33] 0.37
0.39] 0.44) 0.77} 0.31|—0.05|—0.33] 0.51) 0.20) 0.45] 0.43] 0.36] 0.41) 0.32
0.33) 0.34] 0.49) 0.01/—0.17|—0.39| 0.47/—0.03) 0.29} 0.27; 0.29] 0.38] 0.19
0.18) 0.15} 0.08|—0.30|—0.25|—0.36| 0.31/—0.25) 0.05} 0.04) 0.15] 0.25) 0.00

—0.16|—0.14|—0.18|—0.21|—0.44/—0.59 |—0.43 |—0.21/—0.18|—0.09|—0.09|—0.18
—0.20)—0.20/—0.28|—0.14|—0.39 |—0.50|—0.52 |—0.19|}—0.23|—0.09|—0.15/—0.25
—0.15\|—0.05| 0.14} 0.24) 0.20) 0.17) 0.21) 0.39) 0.24) 0.02) 0.08/—0.17
—0.31|—0.40/—0.75|—0.60/—0.01 |—1.15|—1.46|—0.81 |—0.78 | —0.30|—0.24/—0.39

—0.39 —0.42'—0.43 —0.52|—0.92 |—1.16|—1.29 |—0.53 |—0.53'!—0.26|—0.25 |—0.35
—0.41)—0.54|—0.86|—1.10|—1.55|—1.84|—1.90 —1.20)—1.00/—0.45|—0.27|—0.35
—0.37 —0.52/—0.81 —1.10/—1.47|—1.76|—1.68 |—1.16|—0.91 |—0.41|—0.26 |—0.26

—0.35|/—0.41 |—0.38|—0.53 }/—0.84|—1.09/—1.06|—0.48 |—0.44/—0.23|—0.24 /—0.26

—0.38|—0.58 |—1.36|—1.43/—1.70 —1.87|—1.90 —1.61 —1.30'—0.60 —0.31|/-0.39
—0.04'—0.00 —0.06|—0.05/—0.20!—0.30'—0.00 —0.05) 0.00, 0.00/—-0.01 —0.10

- 0.39;—0.39 —0.24| 0.10} 0.18} 0.40 —0.45' 0.22) 0.17 —0.17/—0.25 —0.35

The numbers without sign must be added ; those with the sign — must be subtracted.

F 72

Russia. — CATHARINENBURG.

LXVI.

637

Lat. 56° 50’ N. Long. 60° 34’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Russ1a.—St. PETERSBURG.

Degrees of Reaumur.

Degrees of Reaumur.

Hour |; Jan. | Feb. | March. April. | May. | June. | July. | Aug. | Sept. | Oct. | Noy | Dec. i Year.
Midn. || 0.42| 1.07| 1.70| 2.12] 2.64) 3.06) 2.93) 2.16| 1.96] 0.89, 0.47| 0.47|| 1.66
1 | 0.52 1.19) 2.00) 2.40) 8.11} 3.51) 3.41] 2.49) 2.31) 1.08, 0.51) 0.50) 1.92
2 | 0.52} 1.25/ 2.23). 2.82) 8.49] 3.90| 3.86] 2.76| 2.58] 0.99) 0.54] 0.52)| 2.12
3 | 0.55) 141) 2.53) 3.05) 3.73) 4.15) 4-11] 3.03) 2.83) 1.47) 0.58) 0.54) 2.33
4 | 0.63) 1.52) 2.75) 3.26] 3.74| 3.92] 4.28] 3.22/ 3.06] 1.61) 0.68| 0.58) 2.44
|
5 | 0.68] 1.67| 2.85 3.24] 3.27| 3.85| 3.66| 3.14| 3.22] 1.67| 0.71| 0.61] 2.34
|
6 || 0.73] 1.76} 3.06] 2.24) 2.27) 1.99] 2.47] 2.45] 3.04] 1.69| 0.82 0.64 | 1.93
7 | 0.81) 1.76) 2.59) 1.61] 0.89) 0.61) 1.02) 1.37) 2.27) 1.53, 0.85) 0.65, 1.33
S |) 0.88| 1.51) 1.46] 0.34|—0.24|—-0.53!—-0.28] 0.18} 0.85| 0.91] 0.77] 0.58) 0.54
9 | 0.67) 0.73 —0.06| -0.81 —1.09 —1.46 |—1.45 | —0.97 —0.57|—0.03| 0.33] 0.39 —0.36
10 || 0.13) —0.45 |—1.45| —1.99 —1.94 | —2.23'—2.35 |-1.72 |—1.68 | —0.78 |—-0.22 —0.08 —1.23
11 ee —1.44 —2.39| —2.62 |—2.72| —2.93 |—-3.10 | —2.54 | —2.50| —1.46 |—0.72 | —0.71 —1.98

\|
Noon. | —1.04/—2.13 |—2.95 , —3.09 |-3.19 | —3.38 |—3.58 | —2.99 | —3.09 | -1.73 |--1.03 | -1.19 —2.45
1 |-1.39|-2.58|-3.27 | -3.22|—3.28| -3.48 |—3.57 |-3.04 | -3.32 | -1.99 |—1.25 | 1.45 —2.65
2 | -1.50|—2.74|—3.38 | —3.26 |—3.41] —3.59 |—3.55 | 3.02 |—3.36 | —2.02 |—-1.23 | -1.29 —2.70
3 | =1.28/—2.37|—3.18 | —2.86 | —3.14| —3.37 !|—3.40 | —3.03 | —3.48 | -2.23 |—1.11|—1.00 —2.54
4 | —0.85|—1.97|—2.82 | —2.65|—2.99 | 3.05 | —3.15 | —2.83 |—3.18 |—1.61 |—0.79 | -0.61 —2.21
5 | —0.50|—1.28|—2.20|—2.14|—2.60| —2.49 |—-2.67 | —2.37 | —2.48 | —0.95 |—0.47 | —0.33 —1.71
1
6 | —0.22|—0.74|—1.37|—1.46 |—1.98| —1.98 |—2.14 |—1.66 | —1.56 | —0.56 | —0.26 | —0.11/—1.17
7 |: 0.00|—0.25 /—0.67 | —0.59 | 0.95 | —1.17 | —1.29 | —0.79 | —0.65 | —0.22|—0.07| 0.02 —0.55
8 | 0.10! 0.08/—0.12| 0.13/—0.04|—0.12|—0.16| 0.11] 0.07) 0.06| 0.06| 0.11, 0.02
9 |: 0.17) 0.40] 0.44) 0.65] 0.85/ 0.96) 0.83] 0.84] 0.67] 0.36| 0.16| 0.26) 0.55
10 || 0.24] 0.65| 0.94) 1.13] 1.53} 1.88] 1.67} 1.89] 1.25] 0.53) 0.27 O28 0.99
11 | 0.84] 0.86] 1.34] 1.58] 2.13] 2.51] 2.36] 1.81) 1.65| 0.74) 0.40| 0.56) 1.36
| } F —
| Mean. |-10.76|—9.50|—5.83| 0.47 | 6.31 | 12.08] 14.53/ 10.61] 6.32 | 1.41 |—6.11 -11.68)
LXVII.

Lat. 59° 56’ N. Long. 30° 18’ KE. Gr.— Dove.

The numbers without sign must be added ; those with the sign — must be subtracted.

73

| Hour. Jan. | Feb. |March. April. May. | June.| July. | Aug. | Sept. Oct. | Nov. ; Dec. | Year.

Midn. || 0.14] 0.38] 0.73; 1.44! 2.08] 1.99] 1.77 OS: | deaez | O52) 5 O2N5i|) Oaliz | 1.02

1 0.21} 0.44) 0.99 1.68, 2.43) 2.29) 2.05 2.02} 1.388; 0.60 0.17) 0.21 | 1.21

2 0.25] 0.46) 1.22) 1.91 2.70| 2.56| 2.24) 2.24] 1.58] 0.65| 0.15| 0.27] 1.85

3 | 0.30] 0.52/ 1.38) 211 2.91, 2.73, 2.43 | 2.48] 1.75] 0.73] 0.25| 0.34| 1.49

4 0.38| 0.63) 1.56 2.24 2.86| 2.44| 2.32 | 2.59 1.87) 0.78 0.30, 0.36] 1.53

5 0.43; 0.72) 1.71 2.28) 2.38} 1.97) 1.92) 2.40| 1.96) 0.84 0.34) 0.34| 1.44

6 0.45} 0.76 1.75) 1.95 | 1.72) 1.33) 1.33 1.96 1.90| 0.90} 037| 0.80! 1.23

7 0.41} 0.78 1.57] 1.32, 0.93) 0.63) 0.64 | 1.19] 1.47] 0.82 tiesel 0.29 0.87

8 0.42} 0.60; 1.07; 0.65 0.14)/—0.04| 0.05 | 0.42; 0.81) 0.57) 0.32 0.25) 0.44

9 0.35); 0.40) 0.40 —0.05 —0.59 —0.69 —0.56 —0.40 0.00} 0.20) 0.17 | 0.17 —0.05

10 0.13 | —0.05|—0.19'—0.78 —1.30|—1.21|—1.12 ! —1.07 | —0.71 | —0.22 | 0.00, 0.04 —0.54
I 11 |/—0.20|—0.48 ,—0.86 —1.42 —1.92 '=1.71|—1.58 ‘—1.64 —1.27|—0.61 |—0.20 0.14 ad OQh

658

LXVII.

Russia. — St. Pererssure, Continued.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Tfour i Jan. | Feb. March. April.
| |

Noon 70.38 —0.90|—1.31)-1.93
1 | -0.63 }-0.97 | —1.62 |—2.10

2 0.66 —1.04|—1.88 |—2.36

| 3 ||-0.55|-0.99|-1.94|-2.49
4 70.33 —0.83|—1.92|—2.65

5 | -0.25 |-0.45)-1.53|—2.31

| 6 |/-0.19|/—0.26/—1.02/—1.43
| 7 ||-0:18'—0.16|—0.55|—0.61
8 ||—0.14 —0.03 —0.25 |—0.03

9 |'-0.11! 0.08] 0.03] 0.47
10 ~'-0.03! 0.17] 0.24] 0.84
11 | 0.66 0.30) 0.50) 1.17
Mean. 7:41 —6.73!—3.56| 1.10

May.

—-1.99
\—2.17
—2.32
—2.45
—2.60
—2.23

—2.30
—2.41
2:65
—2.90
—2.92
—2.48

=1'565
—0.74
0.06
0.79
1.22
1.76

—1.41
i—0.71
—0.03
0.67
1.25
1.65

| 7.01 |

June.

|—1.30|

July. | Aug.

—1.89
—2.03
—2.15
=2.29
—2.41
—2.06

—2-10
—2.47
|—2.60
—2.64
—2.80
—2.45

=i
0 62
0.09
0.65
1.05
1.40

—0.63
0.02
0.64
1.18
1.45)

11.33! 13.39 13.58 | 8.43 *

Sept. | Oct.

—].72|—0.94

2.31 1.06

—1.76 —0.50

—0.95 | —0.25

0.66 0.33
0.91 0.45

—2.26 -1.75.
—2.34 —1.29)
|—0.46 |—0.40
—2.27 | —0.86 |

—0.35 —0.09
0.07 | 0.07 |
0.40 0.18)

3.61 |—0 80|—3.75

' Nov. | Dec. |

-0.37 |-0.30 |

—0.64 —0.48
—0.63 —0.58 |
—0.20 +0.31
—0.16 —0.22

—0.11 |-0.14
—0.05 | —-0.10
0.01) 0.05
0.08; 0.03
0.08} 0.02)
0.11} 0.11

-1.71/|
lel .68 |
|—1.37

0.40

Year.

—1.34
—1.63
Ileal

—0.84

—0.01)|
0.33)
0.58 |

| Russia. — HEtstncFors.

LXVIII.

Degrees of Reaumur.

|
|
Lat. 60° 10'N. Long. 24° 57’ E. Gr. — Dove. |

| Hour. || Jan. | Feb. | March. April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Nee. I Year. |
|Midn, | 0.06) 0.47) 1.28 | 1.61| 1.61| 2.01] 1.65) 1.36] 0.83] 0.37] ,0.18) al 0.97 |
1 | 0.13) 0.49) 1.48) 1.87) 1.94) 2.44] 1.90] 1.68] 1.03) 0.45 0.15. 0.21) 1.15)
2 || 0.16| 0.52) 1.64) 2.07) 2.21) 2.84] 2.17) 1.98] 1.21] 0.55] 0.18) 0.18) 1.31]
3 0.23) 0.67) 1.84 2.21) 2.58 3.04) 2.45) 2.23) 1.35) 0.65) 0.23 0.15|| 1.47|
4 |) 0.35] 0.64) 1.91/ 2.87] 2.68) 2.77] 2.42) 2.49] 1.48| 0.62] 0.28] 0.23) 1.52!
5 || 0.38| 0.77| 1.98] 2.84 a 2.21] 2.05| 2.41] 1.63} 0.67] 0.33 0.10 | 143.
6 || 0.38] 0.92! al 1:74), D231 |B 1h 1-83) 1)- 8) pe t63 1.0.75 0.33 0.03 | 1.13|
7 || 0.41| 0.99! 1.78] 1.14] 0.58) 0.51] 0.55| 1.11] 1.28] 0.73] 0.36 | 0.01) 0.79
8 | 0.43) 0.99) 1.04) 0.17, -0.19 -0.36 |-0.10) 0.26) 0.58) 0.57) 0.35) 0.00) 0.31,
9 | 0.38) 0.55. 0.04 -9.73/-0.86 —0.83 |-0.73'-0.56 —0.09| 0.33) 0.25) 0.06 -0.18 |
| 10 | 0.08/-0.20 -0.89 -1.49 -1.39 -1.29 |-1.23 -1.12 —0.65 -0.15) 0.13 -0.07 -0.69_
11 /-0.19 —0.93 -1.19 —1.93|—1.76 —1.83 ree -1.05 —0.47 | -0.19 —0.32 ae |
| | i
Noon. |-0.72|—1.25 |-2.36'-2.26|— ee —1.80 —2.02 |-1.67|~0.90 -0.59 |—0.42'—1.46]
1 ||-0.79|—1.50!—2.62|-2.46|-2.12 —2.06 2.13 2.26 '-1.82 -1.08 | -0.70 —0.45 —1.67
2 | -0.74/-1.60 —2.62 —2.56 |-2.19 2.36 |-2.28 —2.31 |-1.85 -1.10 —0.64 —0.42 -1.72)
3 |-0.49 -1.33|-2.46 —2.87/-2.16 —2.49 |-2.13 |-2.17 |-1.75 0.95 |—0.50 —0.22 | —1.58]|
4 | -9.21-0.90 -2.12 -1.89 -1.82 -2.16 |-1.75 | -1.84 |-1.52 -0.77 0.29 -0.02 -1.28,
5 ee 1.56 -1.59 1.49 -1.89 —1.48 —1.64 —1.20 —0.43 /-0.17 0.03 —1.00
6 | -0.01'-0.21 —0.79'—1.09 lot aes |=1.15 |-1.19 |—0.72|-0.25 |-0.09 |—0.02' |
7 | 0.03) 0.07 —0.29 —0.49 —0.86 —0.96 —0.68 —0.64 —0.27/-0.13 —0.04, 0.01 0.35)
8 | 0.08) 0.20) 0.01, 0.14 -0.16 0.36 |-0.10 -0.14) 0.05 | -0.03 0.00 0.11 —0.02:
9 || 0.10! 0.25] 0.44! 0.64] 0.44] 0.37/ 0.55! 0.28] 0.23| 0.05] 0.06) 0.13. 0.29)
10 } 0.08} 0.35] 0.74] 1.04] 0.94] 1.04] 1.02] 0.71] 0.43] 0.13] 0.10) 0.18 0.56
11 |) 0.01) 0.42] 1.01) 1.37] 1.34) 1.54] 1.87] 1.06 | 0.63] 0.27| 0.18 0.15, 0.78
| Mean, 3.02 ~7.18 -8.99' -0.06 5.11 | 10.84 | 12.75! 14.11 | 9.23 | 4.55 | 1.13 -3.42
The numbers without sign must be added Me inuseimieniene sign — must be subtracted.
EF 74

als Maecenas

LXIX. 59
Russia. — Peterssurc. Lat. 59° 56’ N. Long. 30° 18’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

March.| April. | May. | June. | July. | Aug. | Sept.

Morn. 1 0.20} 0.38} 0.92) 1.52] 2.59) 2.40) 1.98) 2.08) 1.39) 0.72) 0.14) 0.17) 1.21 ]j
2 0.23) 0.37) 1.10) 1.75) 2.84) 2.69) 2.26) 2.43) 1.67) 0.77) 0.13] 0.27] 1.38
3 0.22) 0.39} 1.30) 2.01) 3.03} 2.90) 2.49) 2.79) 1.97) 0.82) 0.14] 0.33] 1.53
4 0.21) 0.43] 1.49) 2.19) 3.05) 2.91) 2.57) 3.01) 2.20) 0.88) 0.16) 0.35) 1.62

5 0.26) 0.50} 1.59} 2.17) 2.79) 2.60) 2.37) 2.92) 2.25) 0.95) 0.20) 0.35] 1.58
6 0.37] 0.57) 1.56] 1.88} 2.20) 1.98) 1.88) 2.46) 2.06; 0.98) 0.23] 0.34] 1.38
7 0.51} 0.56) 1.36] 1.35] 1.27) 1.13} 1.15) 1.70) 1.62) 0.92) 0.23] 0.33) 1.01
8 0.59} 0.46) 0.99} 0.68] 0.41) 0.24) 0.34) 0.79) 1.01) 0.72) 0.16) 0.31] 0.56

9 0.53} 0.23} 0.47|—0.02|—0.47|—0.53|—0.40|—0.10| 0.31} 0.36} 0.03] 0.27) 0.06
10 0.33|—0.09|/—0.13|—0.65|—1.16|—1.09/—0.97|—0.86 |—0.42|—0.09|—0.16| 0.18|—0.43
11 0.01|—0.43|—0.74|—1.18|}—1.68|—1.49 /—1.37|—1.47|—1.12|—0.58|—0.35| 0.03|—0.86

Noon. . . |/—0.34/—0.73|—1.28|—1.62/—2.09|—1.83/—1.67|—2.01|—1.75|—0.99|—0.49 |—0.15|—1.25
1 ||-0.59|—0.92|—1.68/—2.01 |—2.50/—2.20|—1.98|—2.53|—2.29|—1.27|—0.54|—0.32|—1.57

2 |/—0.68}—0.95|—1.89/—2.33|—2.91|—2.62|—2.31 |—3.01 |—2.67|—1.36|—0.49 |—0.44|—1.81

8 ||—0.61|—0.36|—1.92|—2.52|—3.25|/—2.98|—2.58|—3.35|—2.81|—1.30|/—0.35|—0.48|—1.92

4 ||—0.45|—0.67 |—1.75|—2.50|—3.36|—3.12|—2.68 | —3.39 /—2.65)—1.12/—0.18|—0.44/—1.86
—0.27|—0.44/—1.44|—2.10|—3.11/—2.89 |—2.46|—3.02|—2.19|—0.88/—0.02|—0.36|—1.61

—0.22/—1.04|/—1.01|/—2.44|—2.26|—1.94|—2.26|—1.50|—0.62] 0.10/—0.26|—1.18
—0.12|—0.02 |—0.60)/—0.86|—1.37|—1.33/—1.15/—1.25|—0.72/—0.37| 0.17/—0.19|—0.65
—0.13} 0.13/—0.20/—0.10)/—0.34|—0.31|—0.29|—0.20|—0.01|—0.12|} 0.19|—0.14|—0.13

maton or
|
2
_—
oO

9 ||-0.14| 0.24) 0.14} 0.54) 0.69] 0.61) 0.49} 0.66] 0.53} 0.11] 0.19/—0.12| 0.33
10 |/-0.09} 0.32) 0.40} 0.96] 1.47] 1.30} 1.07] 1.24] 0.87) 0.33] 0.18|—0.09| 0.66
11 0.02) 0.37) 0.59) 1.20) 2.00) 1.77) 1.45] 1.58) 1.05) 0.50) 0.17/—0.02] 0.89
Micn.. . || 0.12} 0.38) 0.75) 1.35) 2.33) 2.11) 1.73] 1.81] 1.20; 0.63] 0.16) 0.07) 1.05

6. 6 0.11} 0.18] 0.26} 0.14/—0.12)—0.14/—0.03| 0.10) 0.28] 0.18] 0.17) 0.04] 0.10
7. 7 0.20) 0.27} 0.38] 0.25/—0.05|—0.10)—0.00| 0.23} 0.45) 0.28] 0.20} 0.07] 0.18
8. 8 0.23} 0.29] 0.40} 0.29) 0.04|—0.04| 0.03] 0.29) 0.50} 0.30} 0.18) 0.09} 0.22
9. 9 0.20} 0.24) 0.31) 0.26) 0.11} 0.04] 0.04] 0.28} 0.42) 0.24] 0.11] 0.08] 0.19

10.10 0.12) 0.12} 0.13) 0.15] 0.16} 0.11] 0.05) 0.19; 0.22) 0.12) 0.01] 0.05] 0.12
2. 9 ||—0.10|—0.05|/—0.13|/—0.15|—0.32|—0.29 |—0.22|—0.22|—0.17/—0.11|—0.02/—0.08|—0.16
6. 2. 8 ||—0.15|—0.08/—0.18 —0.18|/—0.35|—0.32|—0.24|/—0.25|—0.21|—0.17/—0.02|—0.08|—0.19
6. 2.10 ||—0.13)/—0.02) 0.02] 0.17] 0.25} 0.22] 0.21) 0.23) 0.09|—0.02|—0.03|—0.06| 0.08
6. 2. 6 ||-0.15|—0.20|—0.46|—0.69|—1.05|—0.97 | —0.79 |—0.94|—0.70|—0.33 |—0.05|—0.12/—0.54 |
7. 2 —0.09 —0.20|—0.27|--0.49|—0.82!—0.75 |—0.58 |—0.66|—0.53|}—0.22|—0.13|—0.06/—0.40
8. 2 —0.05|—0.25|/—0.45|—0.83 |—1.25|—1.19|—0.99 |—1.11|—0.83|—0.32|—0.17|—0.07|/—0.63
jon TL 0.00|/—0.23|—0.35|—0.67|—1.05|—0.98 |—0.82|—0.87|/—0.64/—0.28 |—0.19|—0.01|—0.51
7 1 |—0.04'—0.18 —0.16 —0.33|—0.62/—0.54|—0.42|—-0.42/—0.34/-0.18/-0.16) 0.01/—0.28

a]
°

9.12.3.9 ||-0.14)—-0.28/—-0.65 —0.91/-1.28 /—1.18/—1.04'—1.20 —0.93/—0.46/—0.16'—0.12/-0.70
7. 2.2(9) ||-0.11| 0.02/-0.06) 0.03 -0.07\-0.07 -0.05) 0.00) 0.00'-0.06) 0.03'-0.09'—0.04 |

Dail.ext. ||—0.05)/—0.19|—0.17|—0.17|—0.16 —0.11|—0.06|—0.19 /—0.28|—0.19 =9.16|-0.07 -0.15 |

The numbers without sign must be added ; those with the sign — must be subtracted.

F 75

640

Russia. — HEtsinGrors.

LXX.

Lat. 60° 10'N. Long. 24° 57’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean ‘Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

0.64
0.99
1.22
1.26

1.09
0.76
0.38
0.02

—0.27
—0.48
—0.64
—0.76

—0.85
—0.88
—0.82
—0.68

—0.48
—0.28
—0.16
=O?

—0.12
—0.10
0.02
0.28

0.24
0.11
—0.05
=—(0-20
—0.29

—0.21
—0.08
—0.07
—0.13

—0.25
—0.43
—0.42

—0.24;

—0.49
=—0:19

0.19

| Hours. Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept. | Oct.
—————————————S
| Morn. 1 0.47; 0.85) 1.40) 2.10} 2.49] 3.37) 3.16] 2.58] 1.60] 1.06
2 || 0.79) 1.25] 1.86} 3.18] 2.82] 3.78] 3.48] 2.96] 2.09! 1.45
3 || 0.99] 1.55) 2.28] 2.79] 2.89) 3.74] 3.45] 3.11] 2.48] 1.70
4 1.13} 1.71] 2.52) 2.77| 2.62} 3.22] 3.02] 2.92) 2.61] 1.74

5 1.06} 1.66] 2.49| 2.41] 2.06] 2.32] 2.25) 2.39] 2.40] 1.51
6 || 0.86] 1.43} 2.16} 1.76] 1.30] 1.24) 1.23] 1.59] 1.84] 1.10

7 || 0.58} 1.07} 1.57] 0.92] 0.49} 0.20] 0.17} 0.64] 1.06] 0.59

8 || 0.28) 0.60) 0.79] 0.05|—0.26|—0.65|—0.78|-0.28) 0.21) 0.08

9 || 0.01) 0.10 —0.05/—0.74/—0.87|—1.26/—1.51/—1.07|—0.58|—0.38

10 |!—0.25|/—0.42|—0.87|—1.35|—1.34|—1.65 |—2.02|—1.68 |—1.23|—0.77

11 ||—0.48 | —0.91|—1.56|/—1.80|—1.70|—1.93|—2.35|—2.12|—1.71|—1.07
Noon. . . ||—0.70)|—1.29|—2.06|/—2.10|—1.98|—2.16|—2.54/—2.43|—2.04|—1.30

1 ||-0.86|—1.54|/—2.36|—2.30|—2.19|—-2.36/—2 65|—2.61|—2.23|—1.42

2 ||-0.92|—-1.60 —2.45|/—2.37|/-2.32|—2.51 |—2.66|—2.66|—2.30|/-1.43
3 |/-0.84|—1.47|—2.32/—2.31|—2.31|—2.55|—-2.55|—2.55 |—2.20|-1.30

4 |\—0.73|—1.20|—2.01/—2.10/—2.11|—2.42|—2.27|—2.26 —1.92/—1.05

5 ||-0.52)—0.87|—1.56 —1.73|—1.77|—2.13/—-1.85|—1.80|—1.48|—0.74

6 ||—0.32)—0.57/—1.07|—1.25|/—1.30|—1.71 |—1.30|—1.24/—0.95|—0.44

7 ||—0.19|—0.38 |-0.60 —0.72|—0.78|—1.20 |—0.68|—0.62|—0.42/—0.22

8 | —0.15|—0.25|—0.20'/—0.21|—0.24|/—0.61|—0.04/—0.03|—0.00/—0.10

9 |/—0.16|—0.18} 0.10} 0.26] 0.29} 0.07} 0.61] 0.52] 0.31/-0.03

10 ||—0.16|—0.08) 0.36} 0.69] 0.82] 0.87] 1.27] 1.03] 0.54] 0.08

11 |/-0.06} 0.12} 0.63} 1.18] 1.40] 1.75] 1.95] 1.54] 0.79} 0.29

Midn. 0.16) 0.44| 0.96) 1.60} 1.97] 2.63] 2.61] 2.08] 1.14] 0.63
6. 6 0.27| 0.43) 0.55) 0.26)/—0.00|—0.24/-0.04] 0.18) 0.45] 0.33
TAT 0.20) 0.35) 0.49) 0.10/—0.15|—0.50/-0.26| 0.01) 0.32) 0.19

8. 8 0.07) 0.18] 0.30 —0.08/—0.25|-0.63|—0.41/—0.16) 0.11/—0.01

9. 9 ||-0.08|—0.04| 0.03 —0.24'—0.29|—-0.60/—0.45|—0.28/—0.14/—0.21
10.10 ||—0.21/—0.25|—0.26|—0.33|—0.26|—0.39|—0.38|—0.33|—0.35|—0.35

7. 2.9 |'-0.17/—0.24|—0.26'|—0.40|—0.51/—0.75 /—0.63/—0.50|/—0.31/—0.29
6. 2. 8 ||—0.07|\—0.14|—0.16 —0.27|—0.42|—0.63|—0.49 /—0.37/-0.15/—0.14
6. 2.10 |/—0.07|-0.08) 0.02) 0.03 —0.07/—0.13/—0.05'—0.01| 0.03/—0.08
6. 2. 6 | —0.13 —0.25 —0.45)—0.62/—0.77|—0.99 —0.91 |—0.77/—0.47|-0.26
702. —0.17|—0.27/—0.44|—0.73|—0.92/—1.16|—1.25 1.01 —0.62 —0.42

8. 2 —0.32/—0.50|—0.83/—-1.16|—1.29 1.58 -1.72 -1.47 1.05 —0.68
| 8.41 —0.29|—0.47)/—0.79|—1.13|/—1.23/—1.51 —1.72|—1.45 —1.01 |—0.67|
Hegel /—0.14|—0.24/—0.40)—0.69|—0.85|—1.08 |—1.24 —0.99 —0.59 —0.42
9.12.3.9 |\-0.42/—0.71/-1.08/—1.22/—1.22 —1.48 -1.50 =1.38!-1 13|-0.75
7. 2.2(9) |-0.17|-0.22/-0.17/—0.23|-0.31|—-0.54|—0.32 OB 0-16 ee
Dail.ext. || 0.11] 0.06} 0.04! 0.41) 0.29) 0.62) 0.41| 0.23) 0.16! 0.16

The numbers without sign must be added; those with the sign — must be subtracted.
F 76

—0.10
—0:22
—0.32
—0.43

—0.54
—0.61
—0.60
—0.49

—(0:33
—0.18
=—() pL
—0.12

—0.20
(ee
—0.19

0.02

0.21
0.10
—0.03
—0.15
—0.24

—OM7.
—0.05
—0.09
—0.07

—0.15
—0.27
Osa
—0.12

(ets

—0.18:}

0.18

—0.56

—1.65

—1-82
—1.60

Near
—0.88 |!
—0.51

1.67
2-11
2.26
2.21

1.87
1.32
0.67
0.01

|
|

—1.02
—1.38

—1.83

-0.17

0.12
0.42
0.78
1.21

i cates

LXXI-. 641
Norway. — Curistiania. Lat. 59° 55’ N. Long. 10° 43' E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Reaumur.

Hours. Jan. | Feb. | March. May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec.

1 0.16) 0.89} 1.07) 1.56) 2.55) 2.58) 2.21) 2.04) 1.64) 0.74] 0.52] 0.22] 1.35
2 0.21] 0.94) 1.30) 1.88] 2.85) 3.15) 2.53) 2.23] 1.88) 0.82) 0.50) 0.21] 1.54
3 0.27] 1.17} 1.51) 2.03] 3.23] 3.28) 2.64) 2.41] 2.03] 0.94] 0.49} 0.28] 1.69
A 0.32] 1.49} 1.67| 2.12] 3.21] 3.05) 2.62) 2.60} 2.07] 1.06) 0.55) 0.30] 1.84

Morn.

5 0.38] 1.60) 1.82] 2.23] 2.55) 2.39] 2.09} 2.44) 2.14) 1.16) 0.51] 0.22] 1.63
6 0.47} 1.54) 1.69) 1.81) 1.63} 1.31] 1.37) 1.98] 2.10} 1.16] 0.60) 0.11] 1.31
7 0.51) 1.67} 1.71) 1.28] 0.71} 0.43] 0.58] 1.00] 1.50} 1.13} 0.46] 0.19] 0.93
8 0.54) 1.42} 1.29} 0.56) 0.07/—0.32|—0.22| 0.10] 0.62) 0.75] 0.38) 0.15] 0.44

9 0.48] 1.11] 0.36|/—0.06|—0.52/—0.86|—0.78|—0.59| 0.01) 0.15} 0.17] 0.16/—0.03

10 0.24) 0.27|—0.35|—0.67|—1.19|—1.57|—1.26|—1.23|—0.78|—0.48|—0.23) 0.11|—0.59

11 |/—0.17|—0.69|—0.96|—1.38 |—1.66|—2.05|—1.74|—-1.67|—1.44|—1.00/—0.76|—0.20|—1.14
Noon. . . ||—0.67|—1.32|—1.48 |—1.80/—2.17/—2.29|—2.02|—2.11/—2.02/—1.30|/—1.06|—0.40|—1.55

—0.87/—1.90|—1.74)/—2.22|—2.46 | —2.50|—2.21|—2.35|—2.41|—1.59|/—1.15|/—0.42|—1.82
—1.04)|—2.22|—1.95|—2.32|—2.46|—2.40|—2.20|—2.50|—2.54|—1.67/—1.15/—0.35|—1.90
—0.91|—2.29|—2.16|—2.26|—2.54|—-2.47|—2.21| —2.50|—2.50|—1.58|—0.88|—0.23/—1.88 ||
—0.62|—2.00|/—1.99|—2.11|—2.53|—2.29|—2.00|—2.32|—2.35|—1.33|—0.55|—0.12|—1.68

m 0 bo

—0.35|—1.42|—1.58)/—1.80/—2.20|—2.14|—1.87|—-1.97|—1.80|—0.90/—0.23'—0.06|—1.36
—0.12|—1.10|—1.10)/—1-27|—1.82|—1.70|—1.48|—1.48 |—1.21|—0.52|—0.02|/—0.03/—0.99
—0.01|—0.60/—0.65|—0.70|—1.35|—0.98!—0.89|—0.78|—0.57|—0.24| 0.11/—0.10/—0.58

0.12|—0.32|—0.20/—0.14|—0.44/—0.31/—0.30|—0.10|} 0.02] 0.18} 0.23/—0.13/—0.12

mst an o

0.16} 0.09} 0.09} 0.36] 0.24] 0.44] 0.45] 0.55] 0.36] 0.36] 0.27/—0.05| 0.28
10 0.27) 0.34] 0.36] 0.70} 0.93] 1.20) 1.06} 1.08] 0.81) 0.58] 0.33/—0.04| 0.63
11 0.31) 0.52} 0.53) 0.99} 1.46] 1.76] 1.63} 1.41] 1.06] 0.75} 0.43] 0.10) 0.91
Midn. . . || 0.33} 0.86) 0.77) 1.20) 1.90) 2.31} 2.00) 1.75) 1.38] 0.95) 0.48! 0.09] 1.17

©

0.18) 0.22} 0.30} 0.27|—0.10|—0.20|—0.06| 0.25] 0.45| 0.32} 0.29] 0.04] 0.16
0.25| 0.54] 0.53) 0.29|—0.32|—0.28|/—0.16| 0.11] 0.47] 0.45] 0.29] 0.05] 0.18
0.33} 0.55} 0.55) 0.21/—0.19|—0.32/—0.26| 0.00] 0.32] 0.47] 0.31] 0.01] 0.16
0.32) 0.60} 0.23] 0.15|—0.14/—0.21/—0.17|—0.02] 0.19] 0.26] 0.22} 0.06] 0.12
0.26] 0.31) 0.01} 0.05|—0.13|—0.18)—0.10}—0.08] 0.02) 0.05} 0.05} 0.04! 0.02

Sa aS
CHID

—
o

—0.12|—0.15/—0.05|—0.23/—0.50|—0.51|—0.39/—0.32|—0.23/—0.06|—0.14|—0.07|—0.23
—0.15|—0.33|—0.15|—0.22/—0.42|—0.47|—0.38|—0.21|—0.14/—0.11/—0.11|—0.12)—0.23 ||
—0.10|—0.11| 0.03} 0.06) 0.03) 0.04) 0.08] 0.19] 0.12} 0.02/—0.07|—0.09| 0.02
—0.23|—0.59|—0.45/—0.59/—-0.76 |—0.67|—0.70|—0.67|—0.55|—0.34/—0.19|—0.11/—0.49 |

ube kona.
—
one

le ee

SD

—0.27|—0.28 |—0.12|—0.52/—0.88|—0.99| -0.81|—0.75|—0.52|—0.27|—0.35|—0.08 |—0.49
—0.25|—0.40)/—0.33|—0.88 |—1.20|—1.04/—0.99 | —1.20|—0.96|—0.46|—0.39'—0.10/—0.68 ||
—0.17|—0.24|—0.23|—0.83|—1.20/—1.09|—1.00|—1.13|/—0.90|—0.42|—0.39 | —0.14/—0.64
—0.18|—0.12/—0.02/—0.47|—0.88 |—1.04|—0.82|—0.68|—0.46|—0.23|—0.35|—0.12|—0.50 ||

oomst
— em bo bo

7.

9.12.3.9 ||-0.56|-0.60|—-0.80|—0.94|—1.25/—1.29|-1.14/-1.16|—-1.04]-0.59|-0.38|-0.13/—0.82 |!
7. 2.2(9) ||-0.05|-0.09|-0.02|—0.08 —0.32|—0.27|—0.18|—0.10|—0.08} 0.05|—0.04|-0.07|—-0.11

Dail. ext. ||—0.25/—0.31/—0.17/—0.05} 0.35] 0.39) 0.22 —0.20|—0.26

—0.28 --0.06|/-0.05

The numbers without sign must be added; those with the sign — must be subtracted.

F 77

642 LXXII.
Norway. — Drontneimm. Lat. 63° 26’N. Long. 10° 25’ E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

Hours. Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Mean.

Morn. 1 0.29} 0.41) 0.77) 1.94! 2.63) 2.64) 2.53) 2.51] 1.57; 0.89] 0.27} 0.33] 1.38
2 0.25) 0.50) 0.95) 2.09) 2.97) 2.76) 2.75) 2.68] 1.48) 0.91) 0.31] 0.31] 1.50
| 3 0.22] 0.64) 1.11] 2.19) 3.13) 2.82) 2.77) 2.91] 1.59) 0.97) 0.23] 0.42] 1.58
4 0.20} 0.71) 1.27] 2.32) 3.03) 2.82) 2.65) 2.77) 1.55] 1.07] 0.28] 0.34] 1.58

5 0.13} 0.75| 1.37] .2.05) 2.76] 2.52) 2.35) 2.58) 1.59| 0.86! 0.30) 0.42] 1.47
6 0.11] 0.82] 1.42) 1.67) 2.30) 1.96) 1.86) 2.13} 1.49) 0.71) 0.14] 0.43] 1.25
i 0.04) 0.58) 1.35} 1.36) 1.68) 1.39) 1.17] 1.58} 1.07) 0.42} 0.00] 0.36) 0.92
8 0.08) 0.23] 1.17} 0.94) 0.83) 0.61} 0.40) 1.02} 0.57) 0.06/—0.02) 0.36] 0.52

9 0.00|—0.08] 0.41/—0.02/—0.28/—0.03/—0.14| 0.22|—0.07|—0.29/—0.14| 0.19]—0.02
10 ||—0.09|—0.48 |—0.13|—0.85|—1.29|—0.92|—1.30|—1.22|—0.89/—0.59/—0.16| 0.02|—0.65
11 |/-0.16|—0.78|—0.65|—1.90|—2.09|—2.01|—1.95 |—2.63|—1.34|—0.88|—0.33|—0.12|—1.24
Noon. . . ||—0.59|—1.08|—1.35|—2.57|—2.81|—2.43 |—2.77|—3.21|—2.05|—1.20|—0.38|—0.42|—1.75

—0.80|—1.22|—1.70|—2.66|—3.28|—3.25|—3.20|—3.39 |—2.12)—1.14|—0.44|/—0.42|—1.97
—0.68|—1.15|/—1.70|/—2.46|—3.27|—3.32 |—3.07|—3.36 |—2.28|—1.09|/—0.42|—0.47/—1.94
—0.48/—0.80|—1.54|—2.22/—3.25|—3.05|—3.06|—3.21|—1.85|—1.07|—0.28 |—0.37 |—1.76
—0.36 |—0.56|—1.37/—1.83|—2.90|—2.78|—2.41|—2.81|—1.43|—0.86/—0.16/—0.29|—1.48

wm 0 DO =

—0.29/—0.36|—1.07|—1.30|/—2.20|—2.45|—2.02|—2.23|—1.09|—0.50|—0.06 |—0.22|—1.15
—0.17|—0.11]—0.75|—0.90|—1.70|—1.84/—1.15|—1.27|—0.79|—0.51| 0.08/—0.23|—-0.78
0.09|—0.04|—0.54|—0.57/—1.03|—1.00|—0.61|—0.68|—0.32|—0.28| 0.09|—0.30/—0.43
0.27| 0.17|—0.27/—0.20|/—0.37| 0.04] 0.01} 0.11] 0.03/—0.02| 0.17|—0.19|—0.02

Datno

9 0.45} 0.37) 0.00} 0.16} 0.50) 0.41) 0.66) 0.51} 0.43) 0.22) 0.05/—0.11| 0.30
10 0.52) 0.53) 0.23} 0.61} 1.10) 1.08} 1.17] 1.18] 0.75) 0.55) 0.13|—0.06| 0.65
11 0.47} 0.50) 0.43] 0.90) 1.61) 1.63) 1.48] 1.67) 1.02) 0.74) 0.11] 0.02] 0.88
Midn. . . |} 0.45) 0.49) 0.63) 1.27} 1.92} 2.07) 1.88] 2.13] 1.28] 1.14] 0.19] 0.02) 1.12

—0.03) 0.36] 0.34} 0.39} 0.30} 0.06} 0.36] 0.43] 0.35) 0.10) 0.11] 0.10|- 0.24
0.07) 0.27] 0.41} 0.40) 0.33] 0.20} 0.28) 0.45} 0.38; 0.07) 0.05} 0.03] 0.24
0.18] 0.20] 0.45] 0.37] 0.23} 0.33] 0.21] 0.57] 0.30) 0.02] 0.08] 0.09] 0.25
0.23] 0.15] 0.21] 0.07) 0.11] 0.19) 0.26] 0.37) 0.18 —0.04/—0.05| 0.04] 0.14

10 0.22) 0.03) 0.05|/—0.12/—0.10| 0.08|—0.07/—0.02|—0.07;—0.02|—0.02|—0.02| 0.00

oman

7. 2.9 ||-0.06|/—0.07|—0.12|—0.31|—0.36|—0.51|—0.41)—0.42|—0.26/—0.15|—0.12/—0.07|/—0.24
6. 2. 8 |/—0.10|—0.05|—0.18]—0.33|—0.45|—0.44|—0.40|—0.37|—0.25|—0.13|—0.04/—0.08 |—0.23
6. 2.10 ||—0.02} 0.07|—0.02|—0.06| 0.04/—0.09|—0.01|—0.02|—0.01| 0.06|/—0.05/—0.03/—0.01
| 6. 2. 6 ||—0.25|—0.62|—0.39|—0.56)—0.89|—1.06|—0.79 |—0.83|—0.53|—0.30/—0.07/—0.09 |—0.53
|| 7% 2 —0.32|—0.29|—0.18|-0.55/—0.80|—0.97|—0.95 —0.89|—0.61|/—0.34|—0.21|—0.06|/—0.51
AES Eo —0.30| 0.46|/—0.27|—0.76|—1.22|—1.36|—1.34|—1.17|—0.86|—0.52|—0.22|—0.06|—0.63
| 8. 1 —0.36|—0.50|—0.27|/—0.86|—1.23|—1.32|—1.40|—1.19|/—0.78 |—0.54|—0.23]—0.03|—0.73
| 71 —0.38 |—0.32|—0.18|—0.65|—0.80|—0.93|—1.02|—0.91 |—0.53 |—0.36 |—0.22|—0.03/—0.53

9.12.3.9 ||—0.16|—0.40/—0.62|—-1.16|—1.46|—1.28 |—1.33 /—1.42/—0.89/—0.59|—0.19|—0.18|—0.87 |
7. 2.2(9) || 0.07] 0.04)-0.09 —0.19|—0.15|—0.28|—0.15/—0.19|-0.09/—0.16|—-0.02/—0.12|—-0.11

Dail.ext. ||—0.14|—0.20|—0.14|—0.17|—0.08|—0.25|—0.22|—0.24|—0.35|—0.07 —0.07'—0.02'—0.16

The numbers without sign must be added ; those with the sign — must be subtracted.

F 78

EXXIli:
Lat. 70° 37’ N. Long. 57° 47 E. Greenw.
Corrections to be applied to the Means of the Hours of Observation to obtain the true

643
Srrait oF Kara.

Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Reaumur.

Jan.

Morn. 1

mw bh

me wh

natna

— ht DO bo

9.12.3.9

7. 2.2(9)

Dail. ext. ||

F

0.27
0.24
0.22
0.23

0.25
0.27
0.29
0.30

0.26
0.18
0.04
—=(.12

—0.31
—0.49
—0.60
—0.63

—0.58
—0.46
—0.26
—0.06

0.11
0.22
0.28
0.29

0.10
0.02
0.12
0.19
0.20

—0.03
—0.09
—0.00
—0.23

—0.10
—0.10
—0.01
—0.01

Feb. | March.

0.38
0.38
0.40
0.42

1.66
1.78
1.86
1.88

0.42
0.33
0.16
0.08

1.80
1.55
1.10
0.42

0.30
—0.50
—0.64
—0.70

-0.43
-1.32
-2.07
~2.56

—0.70
—0.64
—0.53
-0.38

—2.70
—2.52
—2.10
—1.54

—0.98
—0.47
—0.04

0.34

—0.21
—0.02
0.14
0.32

0.67
0.98
1.25
1.48

0.42
0.46
0.44
0.40

0.54
0.53
0.38
0.12
-0.17

0.16
0.15
0.12
0.06
—0.02

(aaa
—0.21
—0.00
—0.48

—0.02
—0.00

0.05
(eat

—0.71
—1.05
—1.14
—0.80

—0.24
—0.36
—0.39
—0.27

—0.28|
0.09

male
—0.02

—0.12|—0.41

April.

2.53
2.67
2.66
2.44

1.98
1.30
0.52
—0.27

—0.98
—1.58
—2.13
—2.41

—2.67
2
2.49
—2.46

OL
—1.18
—0.37

0.42

1.08
1.59
1.98
2.29

May.

2.26
2.22
2.06
1.82

1.48
1.01
0.40
—0.30

—1.01
—1.65
—2.06
—2.27

—2.26
—2.11
—1.88
Oil

—1.30
—0.90
—0.40

0.20

0.83
1.42
1.88
2.16

June.

1.86
1.68
1.41
1.12

0.82
0.49
0.10
—0.33

—0.78
ell)
—1.48
—1.62

—1.62
—1.54
—1.40
—1.25

—1.05
—0.76
—0.35

0.18

0.78
1.31
1.71
1.90

—0.14
—0.13

5|—0.08

—0.00
0.06

—0.22
—0.29

0.09
—0.60

—0.72
—0.94
—0.98
—0.76

July.

1.37
1.24
1.03
0.79

0.54
0.25
—0.05
—0.35

—0.66
-0.85
—0.98
—1.04

—1.03
—1.00
—0:95
—0.90

—0.78
—0.59
—0.29

0.11

0.54
0.94
1.23
1.38

—0.17
Oo 7
—0.12
—0.06

0.05

Obl Ug
—0.21

0.06
—0.45

—0.53
—0.68
—0.69
—0.54

—0.53
0.01

0.17

Aug.

0.62
0.58
0.53
0.47

0.38
0.26
0.10
—0.07

—0.23
—0.36
—0.46
—0.55

—0.63
—0.71
—0.76
—0.69

—()°59
—0.38
—0.09

0.22

0.46
0.62
0.68
0.66

Sept.

0.33
0.40
0.49
0.58

0.61
0.58
0.42
0.27

0.01
—0.28
—0.54
—0.72

—0.81
—0.78
—0.66
—0.49

—0.30
—0.13
0.06
0.11

0.17
0.20
0.23
0.27

0.23
0.24
0.19
0.09
—0.04

—0.06
—0.03
--0.00
=i bilal

—0.18
—0.26
—0.27
—0.20

—0.30

-08|—0.01

-0.10'—-0.04) 0.07

Oct.

0.00
0.02
0.02
0.06

0.17
0.29
0.35
0.32

0.18
0.02
—0.25
—0.37

—0.43
—0.36
—0.23
—0.10

0.02
0.07
0.08
0.07

0.06
0.06
0.06
0.01

0.18
0.22
0.20
0.12
0.04

0.02
—0.00
—0.00
—0.00

—0.01
—0.02
—0.06
—0.04

—0.09
0.03

Novy.

0.08
0.14
0.14
0.15

0.22
0.36
0.52
0.64

0.66
0.55
0.33

0.18

—0.13
—0.25
—0.30
—0.32

—0.35
—0.41
—0.48
—0.52

—0.49
—0.38
—0.20
—0.03

—0.03
0.02
0.06
0.09
0.09

—0.07
—0.14
—0.09
—0.10

0.14
0.29
0.26
0.20

—0.01
—0.18

The numbers without sign must be added; those with the sign — must be subtracted,

79

0.55
0.42
0.26
0.11

—0.00
—0.15
—0:29
—0.42

—0.54
—0.61
—0.62
—0.54

—0.44
—0.31
—0.21
—0.11

—0.04
0.06
0.18
0.33

0.48
0.61
0.66
0.64

—0.05
—0.06
—0.05
—0.03
—0.00

—0.04
—0.04

0.05
—0.13

—0.30
—0.37
—0.43
—0.37

—0.20)--

0.09

0.02.

0.72
0.55
0.30
0.01

—0.32
—0.63
—0.91
—1.07

—1.14
—1.15
—1.03
—0.87

—0.67
—0.43
—0.15

0.14

0.43
0.67
0.85
0.95

0.06
0.08
0.08
0.05
0.02

644 LXXIV.
Novara Zemiia. — Matoscnkin Scuar. Lat.73°—'N. Long. 57° 20’ E. Gr.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Reaumur.

Hours. 7 ; April. | May. | June. | July. | Aug. | Sept.
aah ie ined cof pont Baas atoms
Morn. 1 2.42} 1.70] 1.18] 0.73} 1.08|/—0.49|—0.14
2 2.28} 1.54| 1.20) 0.79] 0.88/—0.47|—0.14
3 : 1.89} 1.26} 1.11] 0.80) 0.62|/—0.22/—0.10
4 1.41) 0.93} 0.94] 0.72} 0.46} 0.02/—0.00
5 0.85| 0.61/ 0.73] 0.55} 0.46] 0.20| 0.10
6 0.26] 0.30] 0.47] 0.30} 0.56] 0.26] 0.20 |
7 f —0.38|—0.02} 0.18] 0.01] 0.58] 0.18} 0.26 |
8 —1.03|/—0.38/—0.13|—0.30] 0.38] 0.06! 0.26 |
!
| 9 —1.65|—0.78|—0.46]—0.58|—0.00/—0.06| 0.24 |
| 10 , —2.17|—1.16|—0.75|—0.79|—0.71|-0.19| 0.18 4
11 0: —2.53|—1.45|—0.97|—0.91|—1.24/—0.14] 0.15 |
‘| Noon. 2. : —2.67|—1.58|/—1.08|—0.93/—1.46|—0.12| 0.11
1 —2.58|—1.52|/—1.06/—0.85|—1.32/—0.10) 0.08
2 —2.28|—1.32|—0.96|—0.70/—0.89|—0.09| 0.02
| 3 ~1.83|—1.05/—0.81|—0.52/—0.40|-0.07/—0.04
4 —1.30|/—0.78|—0.66|—0.32|—0.07|—0.02/—0.10
5 —0.72|—0.57|/—0.54|—0.14|—0.02| 0.10/—0.18
6 —0.14|—-0.38}—0.43|—0.00|—0.17| 0.26/—0.20 j
7 0.46|—0.16/—0.30] 0.12/-0.35| 0.40|-0.18 t
8 1.04] 0.15)—-0.11] 0.21|—0.36] 0.46/—0.14
9 1.59} 0.56} 0.14] 0.30/—0.12] 0.36/—0.10
10 4 2.06| 1.02] 0.46] 0.39] 0.33] 0.18/—0.08
11 ‘ 2.40| 1.42] 0.78] 0.50} 0.79/—0.15|-0.08
Midn. . . : 2.55| 1.66] 1.03] 0.62] 1.06/—0.39/—0.11
6. 6 0.04) 0.28 —0.04| 0.02} 0.15} 0.20} 0.26] 0.00] 0.03
17 0.08! 0.01] 0.23 —0.09|—0.06|} 0.07] 0.12] 0.29) 0.04] 0.01
8. § 0.11] 0.03] 0.13 —0.12|—0.12|—0.05} 0.01] 0.26] 0.06/—0.01
9. 9 0.11] 0.05|—0.02] 0. —0.11|/—0.16|—0.14/—0.06| 0.15] 0.07|—0.03
10.10 0.08] 0.07/—0.15 —0.07/—0.15|—0.20/-0.19|—0.01} 0.05|—0.04 |
1 DK 0.09|—0.02|—0.13 —0.26/—0.21|—0.13/—0.14| 0.15] 0.06/—0.02
6. 2. 8 0.06|—0.04|—0.06 —0.29|/—0.20|—0.06/—0.23| 0.21] 0.03/—0.03
6. 2.10 0.05|—0.01|—0.04 —0.00|—0.01|—0.00|—0.00} 0.12} 0.05|—-0.02
6. 2. 6 0.05|—0.07|—0.13 —0.47|—0.31/—0.13|—0.17} 0.14] 0.01] 0.01
7.2 0.08|—0.11|—0.17 —0.67|—0.39|—0.35/-0.16| 0.05} 0.14| 0.22
Soo 0.10/—0.10 | —0.31 —0.85|—0.55|/—0.50|—0.26'—0.02| 0.14| 0.22
8.1 0.08|—0.10|—0.30 —0.95|—0.60|—0.58/—0.47|—0.02| 0.17] 0.28
Tal 0.06|/—0.11|—0.16 —0.77|—0.44|—0.42/—0.37] 0.04] 0.17] 0.28
9.12.3.9 0.09|—0.04/—0.43 —0.71|—0.55|—0.43|—0.50} 0.03] 0.05/—0.00
7. 2.2(9) || 0.10] 0.02/—0.12 —0.06|—0.13|—0.02|—0.14| 0.20) 0.02/—0.14
{| Dail.ext. ||—0.10| 0.04] 0.03 0.06| 0.06|—0.07\—0.19|—0.02) 0.03 —0.02
SS ee

The numbers without sign must be added; those with the sign — must be subtracted.

F 80

LXXV.

645

Norway. — Bossexor. Lat. 69° 58’ N. Long. 22° E. Greenw.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

80 Days

Hour. Jan. Feb. March. April. Sept. Oct. Nov Dec Ss
A.M. 2 —0.26 0.36 1.37 cls 1.20 0.66 0.04 0.35 0.04
4 || —0.11 0.30 1.78 1.01 0.53 | —0.03 0.42 0.10

6 | 0.00 0.50 1.90 Ses 1.22 0.73 0.04 0.28 0.08

8 | 0.09 0.26 1.18 0.36 0.62 0.41 0.07 0.10 0.02
10 | -0.13 | —0.19 | —1.09 | -0.85 | -1.01 | —0.29 | -0.15 | —0.14 | —0.19

|

Noon. 0.18 | —0.79 | —2.39 | —1.29 | —1.66 | —1.05 | —0.13 | —0.09 | —0.03
2 | 0.20 | —1.02 | —2.65 | —1.22 | —1.69 | —1.02 | —0.09 | —0.34 —0.10

4 | 0.30 | -0.11 | —2.88 | —0.82 | -1.54 | -0.50 | 0.09 | —0.38 0.06

6 | 0.18 0.06 | —0.57 | —0.10 | —0.27 | —0.17 0.18 | —0.23 0.09

8 | 0.12 0.16 0.46 0.70 0.39 0.09 0.14 | —0.26 0.02
10 || —0.34 0.21 1.19 1.44 0.79 0.13 | —0.03 0.14 | —0.10
12 | —0.27 0.22 1.39 1.83 0.89 0.49 | —0.13 0.17 | —0.10
eta : ae *, nls 2 ial ree a Paaeeee eee
Mean. | —7.67 | —6.39 | —7.55 | —0.77 5.91 | —1.62 | -6.55 | —5.66 | —7.66

LXXV".
Norway. — Bossexor. Lat. 69° 58’ N. Long. 22° E. Greenw.
Centigrade Degrees.

80 Days

Hour. Jan Feb. March. April. Sept. Oct. Nov Dec. without

un.

A.M. 2 —0.32 0.45 Mead eee 1.50 0.82 0.05 0.44 0.05
4 —0.14 0.37 2.22 : 1.26 0.66 | —0.04 0.52 0.12

6 0.00 0.62 2.37 ms 1.52 0.91 0.05 0.35 0.10

8 0.11 32 1.47 0.45 0.77 0.51 0.09 0.12 0.02
10 —0.16 | —0.24 | —1.36 | —1.06 | —1.26 | —0.36 | —0.19 | -—0.17 | —0.24
Noon. 0.22 —0.99 —2.98 —1.62 —2.07 —1.31 —0.16 —0.11 —0.04
2 0.25 | —1.27 | —3.56 | —1.52 | —2.11 | —1.27 |; —0.11 | —0.42 | —0.12

4 0.37 | —0.14 | —2.97 | —1.02 | —1.92 | —0.62 0.11 | —0.47 0.07

6 0.22 0.07 —0.71 -0.12 —0.34 —0.21 0.22 —0.29 0.11

Sea 0:15 0.20 0.57 0.87 0.49 0.11 0.17 —0.32 0.02
10 —0.42 0.26 1.48 1.80 0.99 0.16 —0.04 0.17 —0.12
12 —0.34 0.27 1.73 2.29 1.11 0.61 | —0.16 0.21 | —0.12
Mean. || -9.59 | —7.99 | -9.44 | —0.96 7.39 | —2.02 | -8.19 | —7.07 | —9.57

som ogee F

poe gee

re .

Be, =p

big ay My?

647

HOURLY CORRECTIONS

PER LODE. VARIATIONS.

AFRICA.—AUSTRALIA.

83

Arrica. — St. HELENA.

LXXVI.

Lat. 15° 55'S. Long. 5° 43’ W. Greenw.

649

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.
Degrees of Reaumur.

Hour. Jan.

0.76
0.85
0.93
1.03
1.06
1.11

1.15
1.16
0.95
0.53
|—0.05
'|—0.62

|—1.14
|-1.64
'|-1.81
‘|-1.76
|-1.69
—1.48

|—0.92
—0.27
0.26
0.47

| 0.60
| 0.69

1
1

2
3
4
5
6
7
8
9
0
1

Mean. | 14.21

Feb.

0.70
0.76
0.84
0.92
1.00
1.04

1.07
1.08
0.99
0.63
0.06
—0.55

—1.06
—1.46
—1.67
—1:78
—1.66
—1.38

—0.91
—-0.33
0.21
0.44
0.55
0.64

|
March. | April.

0.58
0.66
0.70
0.76
0.31
0.86

0.63
0.71
0.77
0.86
0.92
0.93

0.98
0.97
0.78
0.52
—0.07
—0.49

0.93
0.94
0.85
0.49
—0.04
—0.51

—1.00
=1.31
—1.46
—1.50
—1.35
—1.06

—0.95
—1.28
—1.48
—1.62
—1.54
—1.27

—0.83
—0.28
0.18
0.34
0.48
0.55

—-0.61
—0.11
0.20
0.34
0.44
0.51

15.04

15.22 | 14.93

May.

0.52
0.61
0.66
0.73
0.80
0.83

0.83
0.89
0.88
0.46
—0.08
—0.47

—0.96
=1.20
—1.32
—1.35
—1.24
—0.94

—0.47
—0.23
—0.12
0.14
0.41
0.45

13.80

June. | July.

0.43
0.48
0.54
0.59
0.65
0.67

0.48
0.53
0.56
0.62
0.66
0.69

0.68
0.71
0.69
0.42
—0.04
—0.40

0.72
0.75
0.72
0.41
—0.04
—0.40

—0.73
—1.04
—1.20
—1.18
—1.03 |
—0.78

—0.76
—1.06
—1.26
—1.24
—1.12
—0.84

—0.40
—0.03 |
0.17
0.26
0.32
0.39

—0.44
—0.07
0.13
0.23
0.33
0.38

12.48 | 11.55

Aug.

0.43
0.48

0.53 |

0.63
0.66
0.73

0.74
0.79
0.72
0.43
—0.02
—0.40

—0.80
—1.12
—1.25
—1.31
—1.13
—0.86

—0.42
—0.03
0.15
0.25
0.32
0.38

11.19

Sept. | Oct.

0.52
0.56
0.62
0.69
0.76
0.79

0.62
0.71
0.78
0.86
0.91
0.94

0.83
0.51
0.72
0.42
—0.05
—0.55

0.99
0.96
0.77
0.38
-0.17
—0.66
|

=1.05
—1.42
-1.38
—1.20
'—0.91

—1.45
—1.67
i—1.64
—1.37
—0.99

—0.48
0.02
0.29
0.26
0.49
0.55

-0.43
0.01 |
0.23 |

0.32)

0.38 |

0.46

| 11.14) 11.66

—0.92!—1.11)

Hour

1.69
2.80
1.89
2.01
2.10

Midn.

1.06
0.15
—0.53
—1.10
—1.72

_—
m—-owe ont D or WD =

—

1.96,

1.50
1.64
1.74
1.92
2.00
2.13

1.53
0.70
—0.01
—0.80
—1.65

—2.23!

—2.31

Feb. |March. April.

LXXVIL.

Degrees of Reaumur.

Arrica.—Care oF Goop Horse. Lat. 33° 56'S. Long. 19° 39’ E. Gr.— Dove.

May. | June. | July. | Aug. | Sept. | Oct.

1.51; 1.87] 1.00] 0.88] 1.04] 0.85] 1.07] 1.45

1.64) 1.49] 1.07] 1.01] 1.20! 1.03] 1.25] 1.62

1.8)! 1-61) 1.14) '1.09| 1.33] 1.14| 1,39] 1.72

1.92! 1.70| 1.24] 1.16] 1.43] 1.23] 1.54] 1.82

2.05 1.88] 1.34] 1.30) 1.53] 1.37] 1.63] 1.92

; 2-18. 1.93) 1.46] 1.42| 1.59] 1.53) 1.59] 1.98
, 1.97| 1.98! 1.59] 1.48] 1.73] 1.55] 1.62] 1.26
1.21) 1.39) 1.41| 1.47) 1.57) 1.22) 0.81) 0.39

0.16 0.36| 0.53 0.86) 0.77) 0.64 -0.06 —0.46

-0.76 —0.68 —0.39 —0.12 —0.24'—0.42 —0.82)—1.24
'-1.66 —1.48/—1.10 —0.90'—1.09 —1.08 —1.41|—1.82
—2.37 —2.10 -1.64 —1.46;—1.72. -1.63 —1.85 | —2.25

Noy.

1.62
1.79
1.98
2.12
2.21
1.92

0.85
—0.02
—0.67
=1.25)
1.80.
2.24)

Dec.

1.85
2.01
2.16
2.30
2.42
2.01

0.86
—0.20
—0.81
—1.36
—1.90
—2.25

| Year.

1.32
1.55
1.58
1.70
1.81
1.50

1.46
0.84
0.06
-0.77
—1.47

| —2.00

The numbers without sign must be added ; those with the sign — must be subtracted.

85

650

LXXVII.

Arrica.—Care or Goon Hors, Continued.

Corrections to be applied to the Means of the Hours of Observation to obtain the true
Mean Temperatures of the respective Days, Months, and of the Year. — Dove.

Degrees of Reaumur.

AvustrALia. — Hoparton.

Lat. 42° 538. Long. 147° 21’ E. Gr. — Dove.

Degrees of Reaumur.

Hour. |

Midn. |

oeomatn ar WwW bh

_
o

11

Feb.

1.95
2.17
2.32
2.53
2.68
2.82

2.59
1.75
0.68
—0.56
-92/—1.61
2.75 |—2.34

|-3.22
2|-3.52
-3.54
-3.36
—2.94
—2.22

—1.04

0.68
1.13
1.47
Lie

|—3.48

|

0.20.

March.) April.

1.78
1.99
2.19
2.39
2.49
2.54

1.31
1.41
1.62
1.75
1.85
1.99

2.64
2.10
1.08
—0.17
=1.28
—2.24

2.11
2.00
1.30
0.24
0.85
|—1.78 |

-3.03 |-2.58 |
|—2.95
—3.63 -3.11
-3 43 -2.87
—2.92 —2.23
—2.02 |-1.35

—0 84/—0.56
—0.04 | —0.05
0.45) 0.32
0.82| 0.57
1.19} 0.84
1.47| 1.06

Mean, | 13.38 13.96 11.96 | 9.41 | 7.69

May.

0.88
1.03
1.11
1.23
1.31
1.44

1.55
1.60
1.27
0.45
—0.46
—1.29

—2.00
—2.42
—2.53
—2.32
—1.69
—0.92

—0.36
0.01
0.27
0.42
0.62
0.77

June.

0.66
0.76
0.88
0.97
1.15
1.15

1.29
1.37
1.26
0.60
—0.18
—0.96

—1.67
—2.08

(— 2.22
| —2.02

—1.43
—0.73

'—0.25

0.00
0.24
0.24
0.40
0.54

5.93

July. | Aug,

0.72
0.86
1.01
1.16
1.28
1.40

1.10
1.36
1.43
1.58
1.69
1.82

1.50
1.50
1.31
0.60
—0.21
—1.01

1.91
1.90
1.32
0.44

-1.67
—2.17
—2.38 |
—2.23
=78
=1.01

—2.28
—2.73
—2.91
—2.71
—2.20
—1.37

—0.48
0.12
0.14
0.34
0.50
0.64

—0.64
—0.13
0.21
0.57
0.79
0.93

5.21 | 6.24

—0.52 |
=1.53|

Sept. |

1.51
1.71
1.93
2.06
2.20
2.32

2.34
1.84
0.93
—0.21
—1.21
—2.09

—2.70
—3.14
—3.25 |
—3.10
—2.53
—1.59

—0.65
0.01
0.46
0.79
1.08
1.31

Ud

Oct. Nov.

2.44
2.67
2.77
2.98
3.11
2.99

1.99
2.19
2.45
2.68
2.80
2.85

2.60
1.61
0.41
—0.70
—1.68
—2.54

2.24
1.16
0.01
—ltS
—2.10
—2.89 |

| Dec.

—3.10
—3.48
—3.48
—3.32
—3.04
—2.02

-3.43
—3.72
-3.67
—3.33
—3.12
—2.30,

—1.01.

0.20
0.90
1.41
1.75
2.05

—0.80
0.05
0.55
1.00
1.34
1.63

9.39 | 11.38 |

3.36

2.45)
2.76 |
2.95
3.24
3.38
3.13 |

2.24
1.03
—0.24)
—1.27
—2.16
—2.85

—3.67
—3.56
—3.45
—3.12
—2.56

—1.38 |
—0.09
0.89
1.51|
1.91
2.25 |

12.95

1

Hour. | Jan. | Feb. | March.| April.| May. | June. | July. | Aug. | Sept. | Oct. Noy Dec Year.

Noon. ||—2.48 | —2.72 | —2.66 | —2.56 | -2.09 —1.92|—2.11 |—1.88 | —2.15 |—2.45 | —2.46 | —2.52 ||-2.33
1 | =2.54/—2.74/ -2.95 |-2.81 /—2.20 —2.07|-2.33 |-2.04|—-2.23 —2.55 |—2.48 —2.61 || -2.46
2 —2.42|—2.54 | —2.86 |—2.79 | -2.14 | —2.06 | -2.33 | —1.97 | —2.18 | —2.44 | -—2.30 | 2.44 || -2.37
3 —2.16 | —2.20 | —2.51 | 2.42 |-1.84 |—1.86 | —2.13 |—1.77 | —1.82 | —2.08 | —2.01 | —2.16 || -2.08
4 —1.75 |—1.70 |—1.78 | —1.75 | —1.28 | —1.28 |—1.49 | —1.32 | —1.28 | —1.52 |—1.66 |—1.90 || —1.56
5 —1.21/—1.09 |—1.03 |—0.71 |—0.61 |—0.64 | 0.76 |—0.57 | —0.56 |—0.71 | —1.05 |—1.28 || 0.85
6 | -0.16|—0.13 —0.10 —0.03 —0.21|—0.29 | —0.33 —0.17| 0.00) 0.20 |/—0.01 |—0.15 || —0.12
“ 0.65! 0.54) 0.35) 0.22] 0.09|-0.05 —0.03, 012] 0.30) 0.57) 0.60} 0.63|| 0.33
8 0.95, 0.79; 0.61) 0.48] 0.36| 0.19| 0.26| 0.32] 0.51] 0.86] 0.92] 0.96|| 0.60
9 1.14) 1.00). 0.92) 0.73} 0.54] 0.40) 0.48! 0.46] 0.69] 1.09} 1.10] 1.20]| 0.81
10 1.30; 1.14) 1.14) 1.00) 0.78| 0.61 0.69} 0.65; 0.97) 1.26| 1.31} 1.46]/ 1.03
11 1.55 | 1.32; 1.29) 1.22} 0.95} 0.81] 0.91 0.76 | 1.02; 1.44) 1.48) 1.67]} 1.20

Mean. | 15.81 / 15.96 | 15.00 | 13.61| 11.38 | 9.84 | 9.96 10.06 11.01 | 12.43 | 13.54 | 14.82

LXXVIII.

Year.

1.59
1.79
1.96
2.14
2.26
2.31

2.14

1.61|

0.80
—0.22
-1.18
—2.02

—2.71
—3.10)
—3.18
—2.98 |
—2.51
—1.72

-1.78

—0.02
0.49
0.84.
1.13]
1.37!

The numbers without sign must be added ; those with the sign — must be subtracted.

86

651

CORRECTIONS FOR TEMPERATURE.

MONTHLY AND YEARLY

CORRECTIONS FOR NON-PERIODIC VARIATIONS,

OR

TABLES

FOR REDUCING THE MONTHLY AND YEARLY MEANS OF SINGLE YEARS *
TO THE MEANS DERIVED FROM A SERIES OF YEARS.

F 87

653

TABLES

FOR REDUCING THE MONTHLY AND YEARLY MEANS OF SINGLE YEARS TO THE
MEANS DERIVED FROM A SERIES OF YEARS.

OssERVATION shows that the monthly and annual mean temperature of a place
somewhat varies from year to year. No law, however, has been as yet discovered
as to the course of these oscillations. It follows that the means derived from observa-
tions carried on during a single year are but approximations to the true means.
These last must be obtained from observations made for a series of years, during
which these irregular variations become insensible by compensating each other ; and
it is obvious that their accuracy increases with the number of years which compose
the series.

Professor Dove, having proved by his researches that these abnormal temperatures
above and below the average of a whole month, or of a year, are apt to be felt simul-
taneously on extensive tracts of country, concluded that the means of a single year
could be made available for obtaining the true means of the place, by being corrected
for the non-periodic variations by means of normal'stations in the same meteorological
region, in which those elements had been more accurately determined by the obser-
vations of a long series of years. Comparing, namely, the means of a given year
with the means derived from the whole series, we find a difference in 4+- or —, which,
applied, with reverse signs, to the means of the same year in the neighboring station
to be corrected, will reduce, with a good degree of probability, the means of that
particular year to the means which would have been obtained from a long series of
years similar to that of the normal station.

The following tables, LXXIX. to XCVII., have been selected from those given by
Dove in his five papers on the non-periodic variations of the atmospheric tempera-
ture, to be found in the Memoirs of the Academy of Sciences of Berlin for the years
1838, 1839, 1842, 1848, and 1853, to which we must refer for further details. They
furnish normal stations for various latitudes ; the columns contain the corrections for
every month, viz. the differences, with reverse signs, between the monthly means in
the year indicated in the first and last columns, and the means derived from the
whole series, which are contained in the line at the bottom.

654

Year.

1796
ee UG
1798
1799
1800

1801
1802
1803
1804
1805

1806
1807
1813
1814
1815

1816
1817
1818
1819
1820
1821

| Means.

1822
1823
1824
1825
1826

1827
1828
1829
1830
1831

1832
1533
1834
1835
1836

1837
|| 1838
1839
| 1840

1841
1842
1843

Means.

|—0.09

i|—0.13]

Jan.

0
0.00
—0.13
—0.13
0.40

0.44
0.44
0.22
1.64
0.27

0.00
0.22
0.80
—0.36
—0.98

—1.09
—0.58
0.22
=1.78
—0.67
1.02

19.19

—0.36
0.31
0.71

0.80

—0.09
1.07
0.09

(524
0.31

—0.49
0.36
0.18

—0.66

—0.75

—0.31

—1.24
0.36

0.05
—0.09)
0.23

|| 20.53|

LXXIX.

Region of the Monsoons. — Mapras.
For Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

Feb. |March.} April. | May. | June. | July. | Aug. | Sept.

°

0.24
1.12
—).08
0.41

0.01
0.86
0.24
1.48
0.41

°
0.00
0.66
0.40
0.62
0.57

1.77
1.77
0.80
0.75
0.66

-0.09
—3.20

0.13
—0.58
—0.67

—0.39
—1.54
0.37
—0.39
0.32

—1.56
—0.67
—0.80
—0.76
—0.85

1.06

21.30

—1.76
-0.70
0.32
—1.28
—0.30
0.64

20.07

0.41
—0.21
0.27
—0.21
0.45

0.37
0.37
0.59
0.37
0.24

—0.29
0.51
—0.69
—0.74
1.49

—0.17
—0.57
—0.35
0.01
1.66

—0.29| 1.26
0.91/—0.19
0.60,

—0.73/—0.57

—0.73)-1.41

—0.02) 0.06

—0.69

—0.11

—0.42|—0.70

—0.16 —0.17

—0.51/—0.08

—0.02)—0.03

21.31)

22.92

0.55)

—0.30
—0.12.

° ° ° c °
0.36|—0.10|—1.48 |—1.16|—1.15
0.53) 0.39] 0.56] 0.09) 0.85

0.39} 0.53

°
—0.31
—0.09
—0.31| 0.27

0.36] 0.26/—0.06/—1.20] 0.00|/—0.36
1.20|—0.23|—0.50|—1.02|—0.40|—0.58

1.02
0.53
1.38
—0.36

0.09
—5.47
0.96
0.04
2.00

—0.93
—0.62
—0.04
—0.13

0.58
—1.51

22.41

—0.28
0.30
0.52
0.12
0.92

0.17
—0.59
0.08
—0.32
0.48

1:73
0.97
—0.58
—1.07|
—0.72
—0.63
0.04
—0.45
0.17
—0.58)
—0.49
0.22

24.27|

—0.36
—0 32
0.70
0.61

—0.41
—=179
1.12
—=2 199
1.55

0.44
0.12
1.41
0.48
16
0.26

24.41

0.07
0.15
—0.02
0.24
0.78

—Veae
—0.42
—0.11
—2.73

1.89

2.51
0.83
1.51
—0.24
0.60

=
—0.33
—0.15

0.29
ny

0.47
—1.53

25.62

—0.59|—0.67
0.65| 0.58
0.08] 0.18
0.70| 1.24
0.52|—0.76

0.00
1.20

=1-61
0.48
-0.32| 0.44
1.10| 1.38
—1.39|-0.98

0.39|—0.44
—0.19} 0.67
0.65/—1.33
0.88] 0.44
—0.32| 0.18
0.08} 0.58

23.84

24.96

—0.76
0.22
1.55
0.04
0.04

—0.01
—0.23
—0.89
—0.36

0.04

—0.95
0.29
0.60

—0.29

-1.17

—0.46
0.54
0.16

—0.15
1.36

1.64
1.33
—0.98
—0.67
—0.58
—0.40
0.75
—0.49
—0.45
—0.81| 0.35
0.07; 0.00
—1.0-+4/—0.22

25.35) 24.51

2.65
0.83
0.12
—0.86
0.12

—() 241
—0.24
—0.41

0.25

0.63|—0.49
—0.04] 1.60
0.80} 0.80
0.00} 0.58
—0.22|—0.27

0.13] 1.07
—0.17|—0.09
—0.22|—0.18
0.29|-0.22
0.27] 0.31

=—() eal
0.29
—2.00
0.98
0.23
0.94

—0.67
—0.71
—0.18
—0.31
—0.09
—0.04

23.03

23.43

0.72
0.17
0.88
—0.36
—0.36

—0.37
—0.60
1.56
0.03
0.25

—0.09
0.04
—OL01
—0.23
0.67

=—0.15
—0.60
0.16
0.25
0.70

2.40
0.40
—0.18
—0.45
—1.29

—0.05
—0.05
—0.93
0.27
Oeil
0.09)
0.44

0.34
0.16|
—0.15
—0.46|
0.24
0.03
0.65
—0.68
—0.77
0.74,
—0.86)
0.16

23.73] 23.70)

Oct.

°
—0.28
—0.33
0.56
0.38
0.20

—0.02
0.43
0.38
0.38

—0.33

0.47
—0.64
0.25
0.07
—0.73

—0.20
—0.55
—0.55
0.03
0.47
—0.02

22.16

—0.70
0.72
—0.93
0.32
0.81

—0.13
—0.17
0.54
1.12
0.41

—0.25
0.41
—0.03
—0.74
0.15

—0.34
—0.12
0.68
0.19
—1.28)
—0.30

—0.52)

Nov.

°
—0.47
0.16
—0.16
—1.44
0.47

—0.20
—0.02
0.33
0.91
0.69

0.96
—0.20
—0.38
—0.20
—0-91

0.33
—0.96
—0.56

0.78

0.69

0.20

20.74

—0.35
0.27
0.14
0.59
0.36

0.54
0.81
0.23
0.68
0.41

0.46

0.19
0.01

—0.48}

—0.92

—O.17)
—0.57
—0.85
—1.14
—0.34
—0.30

0.23

Dec.

fe)
—0.51
—0.02
0.20
0.25
—0.60

0.25
—0.28
0.65
0.29
0.65

0.12
0.78
—1.04
—0.37
—0.82

—.51
0.52
—0.37
0.16
0.47
0.20

19.48

—0.19
0.97
0.26

0259
0.30

0.08
0.21
0.12
0.53
0.53

1.06
—0.01
—0.94
—1.03

—0.85
—0.41
0.71

—0.32)

—0.27
—0.23
—0.32

22.92/ 21.32) 20.67

1807
1813
1814
1815

1816
1817
1818
1819
1820
1821

Means.

1822
1823
1824
1825
1826

1827
1828
1829
1830
1831

1832
1835
1834
1835
1236

1837
1838
1839
1840
1841
1842
1843

Means. |;

The numbers without sign must be sudtracted; those with the sign — must be added.

90

LXXX.

Sicity. — PALERMO.

655

For Reducing tae Monthly and Yearly Means of Single Years to the Means derived

1796
1797
1798
1799
1800

1801
1802
1803
1804
1805

1806
1807
1808
1809
1810

1811
1812
1813
1814
1815

1816
1817
1818
1819
1820

1821
1822
1823
1824
1825

1826
1827
1828
1829

Jan.

Feb. |March.| April.

°

1.18} 0.51) 0.09} 0.12
—1.68|—0.38|—0.33|—1.63
—0.04/—0.69|—0.51| 0.59
—1.62} 1.27] 0.78|—0.10

°

°

°

0.78} 0.58|—0.84/—1.56
—0.24|—0.29|—1.15|—0.19
0.03} 0.20} 0.78|—0.90
—1.75| 1.38} 0.52) 0.64
2.27) 2.96) 0.69) 2.46

—0.11| 0.76
0.09|—0.16
1.67|—1.69 2.08
4.63|—0.82| 0.16) 0.21
0.80} 0.69|/—0.68|—1.59

1.45| 0.24
0.47|—1.01

—1.15
—1.06
—0.24
0.87
0.01

0.64|/—0.04/—0.50
0.16) 0.34)/—1.21
—1.22|—0.86|—1.36
—0.31| 0.23|—0.50
—0.27| 2.49] 0.28

—0.15
=1.51
—1.51

0.54
—0.46

0.69|/—0.91| 0.24
0.40} 0.00)/—0.39
—1.02|—0.80)—0.52
—3.04|—0.88] 0.04
0.07; 0.29) 0.90

—0.40
Orit
—0.66
—1.02

1.89

—0.31
—0.09
0.87
0.18
=Oetil

—0.71|—0.54
VETS 5 5
1.21
0.97

0.37

0.72
—0.97
1.92
—1.28
0.52

—0.91
—1.04

0.49
—0.53
—0.80
—1.04
—0.17

—0.76
P11
1.78
0.42
—1.02

0.50
0.28
—1.01
0.12

—0.88
0.07
—0.16| 0.20
0.79 |—1.90

8.35) 8.27

0.56
0.83

—0.29
0.82
0.23
1.12

9.40

—0.59
Op
0.29
2.49

11.52

from Series of Years.

Degrees of Reaumur.

May. | June. | July. | Aug.

° ° ° °
—0.44/—0.32|—0.52] 0.95
—0.48) 1.12|—1.01|/—1.65
—2.04|—1.83|—1.28|—1.14
—0.79|—1.92|—0.81/—0.48

0.12/—0.59 |—1.12|—0.34

—0.19|—0.59|—0.39|—0.01
—0.24/—0.70|—0.56| 0.39
—0.99|—0.45
—0.35| 0.08

0.63/—0.14

0.37) 0.75
0.26|—0.41

—0.10|—0.16
—0.30| 2.50
—1.08| 0.66

0.14| 1.30
—1.59) 1.21

1.26|—0.56
0.17) 0.72
0.04) 0.52
1.12} 0.12
—0.65|—0.354

0.41| 0.10
0.74} 0.90
—0.48|—0.43
—0.48} 0.86
0.50|—0.63

—0.14
1.37
0.88
1.46

—0.54

—0.85
0.92
0.04

—0.23

—0.19

0.43} 1.46
—0.61} 0.15
0.79} 0.32
—1.46/—0.59
0.61|—0.63

0.97
—1.32
—0.92
—0.96
=1.12

0.26
—0.21
—1.25
—0.56
—2.01

0.05|—1.94
- - | 0.32
0.19|—1.10
=0.12|—0.21
2.03} 0.68

—0.65
—0.39
—0.25/—0.45
—0.28|/—0.34

0.48) ..

—0.48
0.46

0.85|—0.74
0.68| 2.97
0.99} 0.30
1.25|—0.25
0.30|/—0.45

—0.30

1.48
—0.36
—0.70
—0.10

—Oazil
1.46
0.35
1.86
0.46

—1.08
0.18
1.99

—0.09

14.35
|

—0.74
—1.30

1.28
—0.47

17.12} 19.25

0.39
0.80
2.48
0.16

0.52
1.33
1.10
—0.12

19.48

0.72|—0.41)

Sept.

o
—0.67
—0.63

0.86
—0.14
—0.72

0.40
0.15
0.00
0.48
—0.58

—0.07
0.42
0.31

—0.14

—1.52

SUNG
2.80
2.42

—0.67

=0.29

0.04
—0.69
—1.00
—2.03
—0.78

—0.80)

—0.34
0.24

—0.52

0.51
1.88
—0.34
0.13
0.55

1.35
—0.73

0.74)

0.41

17.60

Oct.

O°
—0.36

0.22
—0.54
—0.69

Noy.

°

1.73
—0.83
—0.25
—0.29
—0.23

0.00
—0.12
1.97
—0.32
—0.18

1.04
1.51
1.42
1.22
—1.85

—0.14
1.95
—0.29
—1.36
0.06

0.00
0.35
0.04
—0.52
0.08

—0.63
—0.47
0.33
Set
—0.65

—0.72
0.06
—1.63
0.64
—0.05

—0.87
—1.76
0.06

0.35

——

11.69

Dec.

°
0.00
—0.96
0.44
—0.47
0.18

0.98
0.16
0.31
0.40
0.09

1.64
1.40
0.42
1.40
—1.02

0.40
—0.07
—2.31

—0.98
—0.91

—0.76
—0.18
—=1<18
—0.42
—0.78

—1.24
—0.02

0.62
0.82
0.29

0.69
0.18
—0.53
0.51
1.67

—0.24
—0.04
—0.37
—0.16

9.44

1791
1792
1793
1794

1795

1796
1797
1798
1799
1800

1801
1802
1803
1804 |
1805

1806
1807
1808
1809
1810

1811
1812
1813
1814
1815

1816
1817
1818
1819
1820

1821
1822
1823
1824
1825

1826
1827
1828
1829

Means. |

The numbers without sign must be subtracted ; those with the sign — must be added.

ol

656

For Reducing the Monthly and Yearly Means of Single Years to the Means derived

Year.

1763
1764
1765
1766
1767

1768
1769
1770
1771
1772

1773
1774
1775
1776
1777

1778
1779
1780
1781
1782

1783
1784
1785
1786
1787

1788
1789
1790
1791
1792

1793
1794
1795
1796
1797

)
}

Jan.

°
=1.37
1.68
3.88
—3.42
—4.22

—0.82
1.88
—0352
1.78
1.58

1.58
0.48
0.38
—0.32
—1.52

0.38
—3.52
—0.62
—0.12

2.18

0.98
0.48
0.58
0.18
—0.32

2.78
—1.72
—0.12

2.48

0.98

1.22
2.28
—=oele
2.48
0.78

1.78
—3.22
1.78

1.38
0.18
2.38

Feb.

°
1.58
1.98

=0:92

—1.52

0.38

—1.22
—0.42
0.98
—0.52
2.48

—0.42
0.08
2.08

—0.02

—1.42

0.08
1.98
1°92
0.38
—2.42

1.18
—2.02
—].12

0.68

0.08

1.08
0.98
1.48
1.08
—0.12

—0.02
3.08
—=3.12

1.18
0.18

2.08

0.88
4.58

1.08
1.18
3.52

LXXXI.

Norrtu Iraty. — MILan.

from Series of Years.

Degrees of Reaumur.

March.

o
—0.60
—0.70
0.60
—0.40
0.10

—1.50
—0.50
—0.60
—0.60

2.50

—0.80
0.70
1.60
1.30
1.30

—1.90
0.00
2.70
1.90

—0.70

—0.60
0.50
—3.80
—0.90
0.90

2.30
—1.70
—0.20

1.20

1.30

0.40
2.00
—0.20
= e70
—1.40

0.20
0.60
—1.10

1.50
0.70

0.30

April.

Oo
0.27
—0.63
0.47
0.57
—0.93

0.37
—1.63
—0.33
—1.43

0.57

—0.03
0.77
0.47
0.97

—0.23

1.47
1.07
—0.43
1.47
—1.03

0.97
—2.03
—Ie23

0.87
—0.03

1.37
1.37
—1.73
1.87
1.87

—1.43
2.37
1.37

—0.13
0.67

0.27
—1.23
2.67

0.77
0.87

May.

°
—2.28
1.32
—1.08
0.02
—1.08

—0.58
—0.48
—0.58

1.02
—0.58

—0.48
—0.28
—0.58
—1.28
=1208

0.62
1.72
1.72
0.22
—1.08

0.42
2.62
0.72
0.72
—1.98

—0.18
2.22
1.62

=0:18

—0.18

—0.38
—0.08

1.52!

—0.28
1.22

0.72
—0.98
1.32

0.32
—0.08

1.47)

—0.88

June. | July. | Aug. | Sept. | Oct. | Nov. | Dec.

° ° oO ° ° Oo °
—0.79) 0.68] 1.11/—1.11|—1.69|—0.56} 1.02
0.91|—0.12|—1.29|—1.21/—1.19|—0.26} 1.52
0.11|—2.62|—1.69|—0.11| 0.11] 0.24/—0.98
1.31|—1.32/—0.19|—1.21|—0.49| 2.14/—0.68
—1.19| 0.78\—0.69} .. ee Sieh O-5o

—2.19| 0.68) 0.51] .. -- | 0.64/—0.78
1.01|—0.52] 1.51) .. |—2.19) 1.24) 0.62
0.81|/—0.72| 0.01} 1.99] 0.51] 1.04;—0.68

—0.19| 0.68} 1.51} 0.49)/—0.69/—1.06| 2.32
1.61} 1.38) 0.41} 0.29} 2.01} 1.94] 2.02

. - |—1.72/—1.29| 0.69} 1.61) 0.34) 1.82
0.51|/—0.12} 1.31/—0.31|—1.09|—0.96|—2.68
0.71| 0.78}—0.09|—0.31/—1.79|—0.16|/—0.88
0.11} 0.48} 0.41/—0.71} 0.11|—0.36)—1.18
—0.79|—1.22] 0.51} 0.19} 0.41] 1.24/—1.98

—0.29| 0.98} 0.81|/—0.81|—0.09} 0.64) 1.72
—1.39} 0.18|—0.19) 1.59) 1.51|—0.16) 1.82
1.51) 0.78} 0.11/—0.51] 1.81)—0.16}—1.08
0.01} 1.78} 0.41) 0.59/—0.89| 0.04) 1.42
1.21} 2.08] 0.91|—0.31|—1.79|—2.46|/—0.58

—0.99| 1.08)—0.29|—0.31) 1.51} 0.24/—1.88
2.11] 1.38] 0.61) 1.49)—1.49|—0.46/—1.18
1.21] 0.68) 0.61} 2.69] 0.41) 0.74) 2.02
0.81|—0.52/—0.89| 1.09|—1.89|—0.36|—0.48
1.71|—0.02| 1.61] 0.09) 0.81] 0.84} 1.72

1.51] 2.78|/—0.39) 0.99} 0.21|/—0.86|—2.88
—0.79| 0.28) 0.11] 0.29) 0.31)/—1.26|—2.38
0.71|—0.72| 1.21) 0.19) 2.21] 1.24) 0.02
—0.49} 0.58} 1.51} 0.09)/—0.29|/—0.46} 1.92
0.21} 0.08} 0.11|—0.41) 0.71] 0.54)—0.08

0.01} 1.78|—0.29| 2.49} 1.31] 1.44] 2.22
0.81} 1.78) 0.21)—1.11|—0.49| 1.84/—0.38
—0.79|/—1.42} 0.91) 0.49) 1.71/—0.16) 1.52
—0.29/—0.12| 0.71) 1.39) 0.41] 1.24/—1.38
—1.59| 1.18} 2.51] 1.09)—0.59) 0.94] 1.32

—0.09) 0.48] 0.51] 0.29|—0.39|/—0.86!—2.08
—1.49/—0.62) 0.41] 1.39] 0.51/—0.96/—1.18
—1.59} 0.38/—0.09} 0.49] 0.01] 1-24|/—0.08

—0.39/—0.62|—0.79| 0.49} 0.61} 0.04) 0.02
1.71) 0.28} 2.21) 1.09) 2.81] 1.04) 1.52
1.11} 0.78} 1.11)/—0.91|—0.49| 0.54] 0.22

The numbers without sign must be subtracted ; those with the sign — must be added.

2

LXXXI. 657
Nort Itaty. — Mivan (continued).

For Reducing the Monthly and Yearly Means of Single Years to the Means derived

from Series of Years.

Degrees of Reaumur.

Year. Jan. | Feb. |March.} April. | May.

1804

1805

1806

1807

1808
|

1809
1810
1811
1812
1813

1814
1815
1816
1817
1818

1819
1820
1821
1822
1823

1824

1825
1826
1827
1828

|

1

| 1829
1830
1831
1832
1833

1834
1835
1836
1837
1838

| Means.

°
3.98
(emi
0.18
0.58
—1.02

0.48
0.08
—0.72
—3.32
—0.12

—0:12
—2:02
—0.52
—2.52

0.48

0.00
—0.79
0.80
1.81
—192

1.01
1.39
—2.18
0.36
1.38

—0.04
—3.72
0.38
0.41
—0.47

0.17
1.03
=2:51
—0.83
—2.16

0.52

Year.

° Oo ° ° Oo ° o
—1.32|—0.60/—0.03} 1.32} 2.11] .. |—0.39} 0.49) 0.71/—0.36|—0.18|} 1804
—0.02/—0.10/—2.03|/—0.78; 0.21|/—0.42|—0.29) 0.79/—1.19|—2.36!—1.58]|| 1805

1.68} 0.10/—1.53} 0.32} 1.01/—0.52/—1.19|—0.41|—0.19| 1.34) 1.92|| 1806

0.28|—2.40|—1.33} 1.32) 0.21) 1.18) 1.71] 0.19] 1.71) 1.34)-0.08|| 1807
—1.62|—3.80/—1.23| 1.62/—0.49| 1.98|/—0.69| 0.39/—2.39| 0.24/—2.08|| 1808

1.98 |/—1.40|—2.63} 1.02] 0.51/—0.52} 0.21|—0.51|—0.19/—0.96| 0.22/) 1809
—0.72| 1.90/—0.23| 0.22)|—1.49|—2.12|—0.79] 0.59) 1.11) 0.34] 1.82] 1810
1.48} 1.70} 1.47) 1.82/—0.29) 1.18/—0.49| 0.39] 2.21| 2:24/—0.38]| 1811
—0.32|—0.40/—1.73] 0.92) 1.01/—0.82/—0.59|—1.41| 0.11|/—2.96|—2.38|| 1812
1.08} 0.50) 1.07} 1.52|—0.99|—2.12|/—1.09|—1.11] 0.21|—0.56] 1.32)/ 1813

—4.42|—1.40) 0.77|—1.98|—1.09|—0.12|—1.09/—1.91|—0.69) 1.04] 1.82)/ 1814
—0.32) 1.90) 0.77) 1.22|—0.49|—1.22/—1.39| 0.29) 0.81/—1.26|—1.78|| 1815
—2.92/—1.20|—0.93|—0.58 |—1.49| —2.22|—3.69|—0.51| 0.41/—1.46/—1.88|| 1816
2.08} 0.30/—2.83|—1.28} 0.21|—3.52/—0.59| 0.89/—1.89| 0.44/—0.18|} 1817
3.34| 0.70} 0.37/-3.80} 0.26) 0.53)/—0.79|—0.23) 0.48) 1.13/—0.39]] 1818

0.73) 1.48} 1.35|—0.02|/—0.53} 0.32/-0.50|) 0.48] 0.46) 0.93] 0.30|| 1819
0.58)—0.56) 1.60) 1.03|—0.48|—0.48} 1.76|}—0.09|—0.30|—0.72|—0.03|| 1820
—0.18|—0.52) 0.59} 0.10|/—2.20|—1.46] 0.43] 1.01/—0.29] 0.78] 0.35) 1821
1.28) 2.10) 0.99) 1.05) 3.31) 0.53] 0.26] 0.78] 0.66] 1.38/—0.48|} 1822
—0.25|—0.37|/—0.55| 0.93|/—0.78|/—0.60| 0.53; 1.18) 0.11/—1.37| 0.01]| 1823 |!

1.49|—0.40|—0.85|—0.16|—1.57| 1.33] 0.90) 0.71) 0.25] 1.25] 2.07|/ 1824
0.62|—2.38]} 1.21/—0.17| 0.32} 0.05) 0.53} 0.86/—0.81| 0.82] 3.92|| 1825
0.44) 0.76|—0.72/—1.23/—0.09| 0.18) 1.55} 0.71) 1.48/—0.56) 1.16|| 1826
—1.72] 1.12) 0.73] 0.46/—1.26] 1.20|—0.60/—1.06| 1.37/—1.46] 0.25]| 1827
—0.36| 1.49] 0.64] 0.45] 1.27} 1.38] 0.19| 0.47} 0.38/—0.81| 0.60) 1828

—2.79| 0.05} 0.05|—0.03| 0.23) 0.22|—-1.15|/—0.29|—0.40|—1.68/—1.90)| 1829
—3.45| 1.66} 2.66} 0.66/—0.33| 1.71] 1.02/—0.79|—0.81| 0.99) 0.60|] 1830
—0.51} 0.73] 0.19)—1.12|—0.56| 0.12/—-1.05|—1.08|] 1.77] 0.24] 1.34]] 1831
0.52|—0.21|—0.68/—2.07/—1.27| 0.03) 0.49)/—1.15/—0.47/—0.41/—1.71|} 1832
1.18}—0.59|—1.23| 2.00) 0.37|—2.28|—2.77|/—3.20/—1.36| 0.14! 1.37||° 1833

—0.80/—0.19/-1.97| 0.53|—0.31/—0.23|—1.16| 0.41/—0.79/—0.23|—-0.94)| 1834

0.76|—0.44|—0.88|—1.01|—1.47|—2.59|—2.35|—2.01 |—2.24|-3.27|—2.69|| 1835
—2.08|—0.05|—1.07/—3.41|—0.49|—0.97|—1 .09|—2.48|—0.65|—2.16|—0.02)| 1836
—4.75|—3.12|—2.41/—3.58) 0.64/—1.29| 0.37/—2.40|/—1.93|/—1.76|/—0.36|| 1837
—2.39|—0.72|—2.74|—0.98 |—0.75|—0.78 |—1.55|—1.58|—1.74| 0.08/—0.80)| 1838

Ot

2.82) 6.40/ 10.03) 14.08) 17.09] 18.92] 18.39] 15.31| 10.79) 5.76; 2.08)| Means.

|
Stay: | |

The numbers without sign must be subtracted ; those with the sign — must be added.

93

458 LXXXIJ.
SWITZERLAND. — GENEVA.
For Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

| ante | Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. Year.

° oO ° O° O° ° ° oO Oo ° ° °
1768 || —0.86|—0-01)—2.38|/—0.14|—0.61|—1.71|—0.92|—1.25)/—1.42| 0.99) 0.77) 0.08)| 1768
1769 0.92} 0.16)—1.05) 0.13|/—0.71|—1.57|—1.11/—1.43|—0.89/—3.00| 1.62} 0.61|} 1769
1770 = ||—1.25|—1.30)—1.72|—2.40|—1.20|—1.34|—2.97/—1.24| 0.49/—0.81| 0.35] 0.42] 1770
1771 0.53|—0.67| 0.17/—-2.68} 0.34/—1.84| 0.07/—1.45/—0.57|/—0.17|—1.80| 1.66|| 1771
1772 0.61} 2.57] 1.76|/—-0.41|—2.23) 0.35/—0.72|—0.47} 0.52) 1.34) 1.29) 1.16]| 1772

1773 1.47|/—1.84|—1.18|—1.16|—1.64|—0.87|—2.03|—1.70)—0.12|—0.35|—0.12| 1.01]] 1773
1774 1.22] 0.91) 2.38} 0.73}—0.94|—0.47|/—1.27| 0.42)—1.08|—1.45|/—1.18)—2.03]| 1774
1775 0.89] 1.89) 0.99/—1.60|—1.90| 0.54/-0.84|—0.82/—0.02|—0.24| 0.33/—0.68]| 1775
1776 ||—1.78] 1.92) 1.85] 0.18|—-1.96| 0.09} 0.20] 0.28/—1.50| 0.26/—0.26/—0.09|| 1776
1777 _-«(||—0.41/—0.76) 2.46)—1.23/—1.51|—0.38;—1.12| 0.45|—0.41) 1.27) 0.21|—1.72|| 1777

1778 0-03/—0.93| 0.86] 0.78|—0.09/—0.76| 1.59] 0.68/—1.85| 0.32] 0.76] 1.85]! 1778
1779 ||—3.43|—0.28|—0.14| 1.70} 0.97/—1.22|—0.61|—0.45| 0.48} 1.77) 0.57) 2.70]| 1779
1780 ||—1.48/—1.63| 2.35/—0.86|} 0.97} 1.14) 0.95) 1.16] 0.14} 0.51/—1.02/—1.25|} 1780
1781 0.96} 1.09} 0.37] 2.15) 1.78) 0.28|—1.17| 0.30] 0.76;—0.47| 1.69] 2.97)| 1781
| 1782 2.22|—3.74/—0.53|/—0.95|—1.76| 0.18|—1.10/—0.72|/—0.97|—1.06|—1.83|—2.04|| 1782

1783 2.01) 1.68|—0.27|—0.71/—0.06|—1.13} 1.75|/—0.94] 0.17] 0.93} 0.81] 1.03]| 1788
1784 ||—1.06|—2.03|—0.43|—2.51] 1.73} 1.69) 0:84/—-1.62| 1.40|—1.87/—0.76|—3.381) 1784
1785 0.58|—3.26|—6.75|—5.48|—0.19| 0.30|—0.33/—1.75| 0.94/—0.40| 0.11) 0.42) 1785
1786 0.41} 0.08/—1.62| 0.69)/—0.25| 1.92|—0.99|—1.22|—0.59|—1.71/—0.69] 0.19|| 1786 |
1787 ||—1.99|—1.15| 1.76/—0.30/—1.98} 0.79|—0.70} 0.21/—0.27) 0.41} 0.72] 2.83]| 1787

1788 1.01} 2.06], 2.19) 1.04) 1.13} 1.04} 1.61/—0.45| 0.71|—0.83|—2.15|—4.48)| 1788
; 1789 ||-1.17| 1.12|/-1.97} 1.19] 1.71|—1.25|/—0.80/—0.19|—0.57/—0.59|—1.59/—0.17|| 1789
1790 0.36! 0.75] 0.99|/—0.73] 1.52] 0.94/-1.10} 0.63)—0.84] 1.95) 1.13] 0.78]| 1790
1791 2.40} 0.04/—0.02; 2.86} 0.61} 1.04} 0.98} 2.30} 0.98) 0.72|—1.37) 1.30) 1791
1792 1.22/—0.28] 2.11} 1.81/—0.12) 1.14) 1.03] 0.83)—0.09| 1.37) 0.86) 0.45)| 1792

1793 |/—-0.52) 1.05) 1.77; 0.08)—0.05| 0.20) 3.12] 2.49/—0.12| 1.24] 0.61] 1.19|| 1793
1794 0.14) 2.21; 1.91] 3.26) 0.76; 1.10) 2.11) 0.39/—0.74/—0.28| 0.86|—1.75)| 1794
1795 ||-4.85] 0.37) 0.26) 1.76) 1.32) 1.34/—0.73] 1.34) 1.54 1.92 —0.96 1.11]| 1795
1796 1.25| 0.72/—2.15/—0.06] 0.60) 0.60) 0.37) 0.80) 1.61] 0.41/—0.14/—-1.92)| 1796
1797 0.11)—1.41/-1.08) 1.49} 2.14/—1.28] 2.21] 1.28] 0.71/—0.08) 0.71] 1.61] 1797
1798 +} 0.53)}-1.17/-1.02| 0.83) 1.00) 1.29) 0.45) 0.81) 0.48)/—0.29) 0.44/—0.96/| 1798
1799 ||-1.57] 1.71|/—0.16|—1.73|—1.70|—1.16|—0.13| 0.67| 0.21/—0.40 —0.54/-2.59/| 1799
1800 1.64} 0.06/—1.66] 2.43) 2.40/—0.83} 1.48] 0.82] 0.96/-1.55| 0.63)—0.27|} 1800

Means. ||—0.43) 0.75| 3.08) 7.19) 11.21] 14.03/15.44/ 14.85)11.49| 7.32) 3.34 0.57)) Means. |

1796 2.27) 0.07|—2.14|—0.25|/—0.91/—0.64/-1.10] 0.16] 0.70) 0.08'\—0.68|—1.70|) 1796
1797 0.45|—0.85|—0.66| 0.97) 0.67/—2.03| 1.27] 0.71!—0.48|—0.26| 0.47| 1.58)| 1797
1798 0.68/—0.25/—0.40| 0.96)/—0.22) 0.32/—0.64|/—0.14] 0.12|—0.08|—0.76/—1.36|| 1798
|

1799 ||--1.44| 1.93|—0-26|—1.60)—1.50/—0.49|—0.46} 0.33] 0.19/—0.26|—1.24/—3.30|| 1799
1800 2.06} 0.03|—1.53] 2.88} 1.66|—0.97/ 1.62} 0.70} 0.41|/—1.16) 0.67|—0.32)| 1800

|
| 1801 1.81] 0.13} 1.43] 0.74; 0.43|—0.26] 0.42] 0.15} 0.90) 0.84! 0.67! 0.95)) 1801
| 1802 ||—3.98|—0.38} 0.94) 1.18! 0.53} 1.66/—0.12| 2.68) 1.72 2.51 0.63) 0.58)| 1802

1803 ||—0.26)—2.58| 0.24) 2.05|—1.42) 0.89} 2.20) 2.25)—-0.79|—0.57, 1.04) 1.88 1803
| 1804 4.58|—1.58|—0.19| 0.30; 1.50) 2.02] 0.04! 0.47] 0.59] 0.22 1.36 Sel 1804

The numbers without sign must be subtracted; those with the sign — must be added

F 94

LXXXIl.
SwitTZERLAND. — GENEVA (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derived

from Series of Years.

Degrees of Reaumur.

-35|—0.70

April. | May.

oO Oo
—1.35|—1.22
—1.80} 1.33
—1.47|} 1.42
—1.87) 1.14
—3.68|—0.06

—0.28
1.34
—1.54
0.53
0.96

0.29
1.23
0.27
0.54
—1.74

1.06
—0.48
—2.11
—0.08

1.00

0.82
—0.54
—1.34
—1.26
—0.21

2.07
0.71
0.47
—0.42
—2:05
1.69

8.79

0.39
—1.19
1.32
0.17
Sao
—0.63

13.45

—1.04
0.90
1.22

—0.06
0.57

0.34
1.29
0.81
0.25
2.70

1.54
0.45
—0.68

0.53
—0.40
2.67
2.28

—0.06| 0.56

—0.95
Ieee
—1.75
—1.55

0.71

—2.14
—2.18
(eth
—0.97
—0.10

—0.69
—0.58
0.27

1.82
0.02
—1.60

—1.98

10.77

0.49

7.03

June.

°
—0.49
1.66
0.48
—1.33
0.12

—0.06
—0.07

0.89
—0.83
—0.49

—0.11
—0.83
1.23
1.53
0.15

0.17
1.21
—0.71
1.14
—0.37
171
1.00
—2.56
0.47

13.61

The numbers without sign must be

«= Jan. Feb. | March.
Oo Oo oO
1805 ||—0.41/-0.23/-0.41
1 1806 || 3.23] 1.83] 0.12
| 1807 |/-1.10) 0.24/—2.65
| 1808 |/—0.49/—-3.14/-2.58
1809 || 2.23) 1.95] 0.19
1810 ||/-3.14/-3.34] 3.08
1811 ||—2,22} 1.98} 1.46
1812 |/-3.92) 1.40!—0.02
1813 ||-1.74| 1.51/-0.69
1814 ||/—1.32/—-3.92/-1.44
1815 |/-2.24| 1.43] 2.17
1816 |/—0.13|—1.33}) 2.54
1817 || 2.50} 2.38] 0.29
1818 || 0.54) 0.69) 0.13
1819 || 1.86) 0.98] 0.82
1820 || 0.10) 0.54/-1.24
1821 1.98|-1.31| 0.94
1822 || 0.20] 1.27| 3.06
1823 ||-1.17| 1.46|—0.29
1824 ||-0.78|-0.30/—1.84
1825 ||-0.07|-0.55|—1.09
Means. |/-0.42| 1.87| 4.70
1826 ||-3.23| 1.12 7
1827 || 1.49/-2.15 2
1828 || 2.82] 1.06] 0.70
1829 |/-0.85'-0.63! 0.10
1830 ||—4.14/-1.74| 1.20
1831 |/-1.10| 0.46] 1.67
| 1832 0.10| 0.36|—0.25
1833 ||—-0.06| 3.36/—-0.50
1834 || 5.06} 1.47] 0.35
| 1835 || 1.15] 1.40|-0.44
| 1886 || 0.48|-0.04| 1.82
| 1837 0.37) 0.52/-2.94
| 1838 ||-3.64)/-0.91| 0.25
| 1839 0.55|—0.07|—0.42
' 1840 || 2.60} 0.02|-3.22
1841 || 0.45/-0.25| 0.77
| 1842 ||-5.18|-2.84| 0.56
| 1843 || 1.50] 2.22|-0.34
1844 Bales elt ac
1845 || 1.70|-3.33/-1.77
Means |'—0.72' 0.98) 4.16
F

July.

°
—0.41

0.08
2.66
0.70
—0.43

101
1.53
—0.37
—2.10
0.37

0.20
—2.40
=0.25

1.41

0.07

—0.65
1.17
0.27
—1.54
0.17
—0.40

17.67

0.90
1.95
0.59
0.15
0.53

—0.02
0.81
—1.29
1.94
1.69

0.57
—0.58
—0.56

0.24
—2.32

—1.98
—0.19
—2.35

0.06

14.96)

Aug.

Oo
—0.73
—0.39
3.03
0.59
—0.32

—0.70
—0.14
—0.69
—1.02
—0.66

—0.59
—2.14
—0.71
—0.41
—0.34

0.84
0.62
—0.85
—1.04
—1.49
—0.11

17.66

2.57
0.66
—0.80
—0.89
—0.01

—0.02|
2.29
a eltd
1.07
0.40

0.28
1.41
—1.23
—1.73
—0.01
—1.37

0.78
—0.73

—1,53

14.58

Oo
0.18
0.11

—0.58

—0.14

~ 1.00

1.37
0.70
—0.43
—1.14
—1.74

0.54
—0.47
2.16
—0.89
0.42

1-93
0.26
—0.07
—0.42
—1.23
0.88

14.70

1.22
0.24
0.86
(ati
—0.94

—0.29
—0.39
=O einia
2.74
0.22

—0.62
—1.16
—0.58
—0.58
—0.56

0.09
—1.08
0.60
1.10

11.84

°
—1.45
1.10
1.42
—2.40
105

1.26
2.21
0.13
0.78
—0.87

1.43
0.59
—1.58
—0.29
0.07

—0.31
0.27
0.69

=D)

—1.58
0.30

9.73

0.95
0.99
0.96
—].52
—0.86

2.16
0.07
0.59
0.68
—1.34

0.14
—0.39
—0.61

1.11
—1.74

0.90
—2.18
—0.24

0.40

7.98

659

Nov Dec. Year.
Oo Oo
—2.19|-1.64|| 1805
1.34| 2.42|| 1806
0.39|—2.48|| 1807
—~0.28|/—2.99|| 1808
—1.76| 0.70|| 1809
1.05] 1.19|| 1810
0.71/-0.85|| 1811
—1.80|—2:74|| 1812
—0.49| 0.32|| 1813
0.95| 2.34|| 1814
—1.57|—0.39|| 1815
—1.05|-0.02|| 1816
0.85|—0.45|| 1817
1.60|—0.26|| 1818
—0.40) 0.95); 1819
—2.16| 0.02|| 1820
2.34; 3.36|| 1821
1.60|—2.32|| 1822
—1.97| 1.04|| 1823
0.03} 1.30|| 1824
0.54| 2.76|| 1825
5.23] 1.27|| Means.
—1.19| 0.03|| 1826
—2.02| 2.56|| 1827
0.62} 0.94|| 1828
—1.28|—3.87)| 1829
0.46/—-0.90|, 1830
0.58) 0.90) 1831
—0.02| 0.62|) 1832
0.39} 3.28|| 1833
0.71|-1.18|| 1834
—2.27|-2.66|| 1835
—0.02| 0.50|| 1836
—1.06/—0.46|| 1837
1.18/—0.57)| 1838
1.43} 2.81|| 1839
1.43|-3.14/| -1840 ||
0.26} 0.89|| 1841
—1.03|—0.71|| 1842
0.25|-0.83|| 1843
2 herd. shill Wega
1.54] 1.74)) 1845. |
3.98] 1.30 Means. |

subtracted; those with the sign — sust be added

‘95

660 LXXXIIl.
South Germany. — VIENNA.
For Reducing the Monthly and Yearly Means of Single Years to the Means derived

from Series of Years.

Degrees of Reaumur.

Year. Jan. | Feb. |March.} April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec.

° o O° ° Oo. O° °C O° fe) ° O°

1775 ||/—1.43) 1.86] 1.21/—2.35|—2.77| 1.32|-0.41| 1.29} 0.84] 0.26] 0.29|—1.09
1776 ||—4.30) 0.57) 0.70|—1.11|—2.30)—0.42|—0.24) 0.25|/—1.42)/—1.53|—1.32|—2.19 |
1777 :-=—(||—1.79|—1.24| 0.32|/—2.93)/—0.22|—0.10/—1.17| 0.57|/—1.38|—0.53) 0.35|/—1.00
1778 1.92/—1.04| 0.18) 1.89) 0.04/—0.43] 1.18} 0.95|/—0.89/—0.54) 0.87] 3.61
1779 ||-1.75| 3.15) 2.27) 3.05) 1.24/—1.32|—1.35|/—0.07| 0.65} 1.00) 0.43] 3.01

1780 ||—1.68} 3.04} 2.73/—1.38|/—0.18|—0.92|/—0.70|/—0.48/—1.08| 0.51) 0.19|—1.99
1781 ||—0.87) 0.05) 0.77) 0.86} 0.25) 1.44/-0.06| 2.31] 1.40/—0.45) 1.84] 0.34 |
1782 2.72|—2.63| 0.60/—0.06| 0.54] 1.82] 2.74| 0.85] 0.86|/—0.76/—1.50| 0.62

1783 3.59| 4.12/—0.08| 0.65] 1.81} 1.94] 1.66) 1.81] 2.12] 1.59) 0.58|—2.56
1784 ||—3.51/—1.87|—0.42|—1.36| 1.69) 0.86] 0.47) 0.49} 1.98/—2.56| 0.70) 0.03

1785 ||—0.73|—0.93|—5.63 |—3.04/—0.67|—1.47|—0.83|—0.86| 2.11/—0.55) 0.41] 0.17
1786 0.52] 0.16/—0.04| 1.84|—1.12| 0.25|/—1.54|—1.85|—0.92|—2.11/—2.12] 0.60
1787 ||—0.39) 1.47) 0:65|—1.46|/—2.11] 1.11/—0.40) 0.35|—0.78} 1.10) 0.93] 2.82
1788 2.22) 0.17] 0.81] 0.05|—0.36] 1.18] 2.28)—1.72| 1.00|/—0.29|—1.39/—6.79
1789 ||—0.49| 2.00|—2.43| 1.19] 2.15/—0.49| 0.40/—0.60| 0.37) 0.77] 0.73) 0.21

1790 0.86) 2.87) 0.31/—1.11} 1.20) 1.56/—1.10| 0.31|—0.83|/—0.76|/—0.43] 2.09
1791 4.29] 1.01] 1.63] 1.33|/—0.44|—0.33|—0.37| 0.67|/—0.84|—0.40/—0.46| 0.89
1792 0.56|—1.24| 0.47) 0.38|—0.96) 0.62) 0.38] 0.26)—0.93|—1.11|/—0.24| 0.56
| 1793 ||-1.55| 1.27|/—1.00|—2.40/—1.23/—1.08| 1.81] 1.86/—0.07| 1.13] 0.64] 1.99
1794 2.24) 2.99) 1.95) 3.74) 1.35| 1.55) 2.92|—0.75|—1.38/—0.19| 0.33|—0.95

1795 ||—4.94|—1.29| 0.23} 1.81}—0.05) 1.44/-1.95| 0.31/—0.17) 2.75|—1.00) 2.28
1796 5.23] 1.32|—2.73|—-1.52| 0.48|—0.04| 0.14] 0.58} 1.96) 0.84/-0.14|/—1.48], 1796
1797 1.58] 1.02/—0.71} 2.10) 2.94) 0.68) 1.95} 2.17] 2.01] 1.23) 0.54) 1.11]| 1797

1798 1.96} 2.83) 1.40} 0.65} 0.26) 0.84] 0.14} 1.29] 1.62|/—0.47/—0.68|—3.68|| 1798
1799 ||—5.34|/—2.08|—0.83|—0.43|—0.45|—1.16|—0.58] 1.00/—0.50} 0.45) 0.58/—2.94|| 1799

1800 0.74/—0.19|—3.31] 5.57| 1.90|—1.45|—0.44| 1.49] 0.27/—0.40| 1.57) 0.10]; 1800
1801 1.85|—0.21| 2.47] 0.80] 1.83/—0.85/—1.18/—1.32} 1.37) 1.94} 1.71] 0.99)| 1801
1802 |/—0.43}-1.34| 0.89) 0.73|—1.14| 1.33] 1.02] 1.65) 0.358] 2.10) 1.84} 1.40!] 1802
1803 ||—2.68|—3.46}—0.50| 2.49|—-1.59|—0.75| 0.23] 0.08|/—2.12|—0.45| 1.24) 0.27|| 1803
1804 3.42|—0.59|—2.44| 0.05] 0.29|/—-0.10) 0.25)—0.51) 0.80) 0.48)/—2.47/-2.40/| 1804

1805 ||—0.48|—1.18}—1.28|—2.16)—1.85|—0.79|—1.26|—1.61|—0.04/—2.89/—2.19} 0.24} 1805
1806 4.04] 2.12] 1.07|—2.07| 1.84/—0.02/—0.16|—0.62| 0.56/—0.80| 1.60} 3.48]) 1806
1807 1.08] 1.96|/-1.54/-1.18| 1.23|-0.34] 1.25) 4.74) 0.17] 1.37) 1.96] 0.46}| 1807
1808 1.20|—0.51|—4.99|—1.20} 1.42] 0.15} 1.30] 1.80) 1.13|—0.97/—0.32/—3.58/| 1808
—0.08|} 1.54|/-1.13}—2.51| 0.89) 0.27) 0.23] 0.79} 0.11/—1.31|—0.75| 1.67]| 1809

—0.71|—0.03| 2.03|—0.74| 0.50)/—1.65| 0.82] 0.15) 2.26|/—0.18|—0.09) 2.01|| 1810
—3.58|—0.91) 2.08) 0.75} 3.12) 4.62] 2.56] 0.99) 0.42) 3.63} 1.20} 0.19]| 1811
—2.13! 0.53} 0.67/—2.67| 0.65] 0.35/—0.87|—0.52/—1.32| 2.04/—0.84/—3.96|| 1812
—1.84| 2.07/-0.76| 1.56) 0.36|—1.82|—1.34/—1.80)—1.34|—0.37/—0.24| 0.68] 1813
—0.34|—4.37|—0.55| 1.54)—2.19|—1.76) 0.66|—0.21/—2.45/—0.73) 0.32] 2.19)| 1814

—1.03| 2.39} 2.06) 0.10] 0.52] 0.28|—1.51/—1.29|—1.20| 0.06/—1.07|/—2.87|| 1815
1.84|—0.80|—0.19| 0.09|/—0.95|—0.73 |—1.58| —1.39|—0.95|—0.73|—0.39|—1.45/| 1816
3.24) 3.78] 0.51|/—4.08} 0.53] 2.18|/—0.08/—0.25) 0.56|/—2.29) 1.09)
2.77| 0.78] 1.84] 2.01/—0.11] 0.55] 0.13)—0.71| 0.41) 0.84] 0.60
1.22} 2.04) 1.94) 1.17|—0.75] 1.01) 0.66|—0.35| 0.71|—0.12| 0.51/—1.21

The numbers without sign must be subtracted; those with the sign — must be added.

F 96

LXXXIIlI. 661

Sovtw Germany. — VIENNA (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derived

from Series of Years.

Degrees of Reaumur.

Jan.

Feb. |March.} April. | May.

June. | July. | Aug. | Sept. | Oct. | Nov.

° °

° oO o ° oO ° oO ° °
—2.47| 0.36|—0.86} 1.78] 1.97/—1.18|—0.96| 2.36|/—0.71] 0.16|/—0.36
1821 2.22|—1.56|—0.72| 1.57|—0.81|—3.08/—1.83|—0.76| 0.51|/—0.12| 1.93
1822 2.85) 1.63] 3.44) 1.05) 1.21] 1.50} 1.16)—0.27) 0.06] 2.12) 0.44
1323 ||—4.55| 0.68] 0.80/—0.29| 0.42/—0.68/—1.35} 0.15) 0.36} 1.13) 0.29
1324 1.77| 2.31] 0.09|—0.72|—0.74|—0.60/—0.22|—0.53| 1.36) 0.60) 1.56

1825 3.15| 0.50|-1.59| 1.02|—0.14|—0.31|/—0.72|—0.47|—0.62|—1.71| 1.74] 3.11]| 1825
1826 ||—3.65|—2.12] 0.91|—0.12|—2.42|—0.38] 1.34) 2.06} 0.69] 0.89)/—0.32| 1.78), 1826
1827 0.69|—2.92| 1.61] 1.65} 1.33} 1.19] 1.67/—1.06|/—0.57| 0.82|/—3.48} 0.83]; 1827
1828 0.19|—2.22| 0.88] 1.30/—0.16| 0.21] 0.63|—1.49/—0.70|/—0.52| 0.48} 1.57/| 1528
1829 ||—1.66|—3.79|—1.87|—0.23 |—2.26 |—2.69|—0.32|—2.62|—0.31|—2.12|—3.62|/—6.11|| 1829

1830 ||—5.31|—3.23|/-0.44| 0.94/—0.39| 0.33) 0.02/—0.04|/-1.81/—1.68| 0.76] 1.13)! 1830
1831 ||—1.42| 0.26] 0.43] 2.23/—0.90|—1.86| 0.33|—1.01|—1.96| 2.02|—0.16|/—0.04/| 1831
1832 0.55| 0.61] 0.04|/—0.16/—1.90|—1.46/—-1.29| 0.32|—0.86} 0.04|/—-1.57/-1.36|| 1832
1833 ||-3.35| 2.33] 0.24/-1.40| 2.57] 1.20)—2.26|—2.80|—1.22|/—0.55} 0.23) 4.03|) 1833 |
1834 4.67| 0.32/—0.29/—-1.17| 2.24] 1.65) 2.61} 1.26) 2.85|—0.08|—0.89| 1.25|/ 1834

1835 1.71} 1.46) 0.46|—1.10| 0.27\|—0.07| 0.92) 0.19] 0.09|—0.76|—3.77/—1.59|| 1535
1836 ||—0.08| 0.29) 3.84| 0.00|—2.95| 0.30|—0.48/—0.78|—0.89| 0.91/—1.00| 2.44|) 1836
1837 0.20 |—2.39|—1.96|—1.18|—2.57|—1.38|—2.96| 0.84|—2.22|—0.82|/—0.74/—0.95|| 1837
1838 ||—5.10|—4.14|—0.50 |—2.44|—0.76 |—0.74|—1.39 |—2.29|—0.03|—1.75|—0.65|—0.84/| 1838
1839 1.12} 0.73|—2.31|/—3.85|—2.04| 1.06) 0.36|/—2.23| 0.23) 1.05) 1.55| 0.70); 1839
1840 1.03 |—0.88|}—3.76|—0.55 —1.59'—1.05 —1.56|—1.94|—0.11|—2.03| 2.09|—7.72|| 1840
a 0.33 |—3.24| 0.65] 0.93] 2.19/—1.02} 0.55|—1.10| 0.24] 2.04] 0.28} 2.27|| 1841

0.63! 3.85| 8.66|13.31| 15.72) 17.14| 16.77| 13.25| 8.51| 3.67| 0.39|| Means.

LXXXIV. Sourn Germany. — RATISBON.

1773 | 3.00|—0.28 | —0.04|—0.28, 0.25} 0.34|—1.23 0.60] 0.47) 1.20) 1.06) 2.35|| 1773
1774 1.63] 0.85) 2.17| 1.97|—0.10}—0.17/—1.11} 0.16|/—1.29|—0.63/—2.98|/—2.32|| 1774
1775 0.67| .2.87| 1.13|/—2.41|—3.42/—0.51/-1.91] .. |—0.73|—2.19|—0.14/—0.64/| 1775

|
zis Ma eos 0 TTS agen 2a gr lbw a etl les west Lay Pole Blin, coool apna Ok eee eeerd [bares ate aye e 1776 ||

1777 ‘|\-1.47|—0.68| 2.37|—1.29|—0.16) 0.28|—1.02| 1.24] 0.01} 1.07) 1.31/—1.17|| 1777
1778 1.88] 0.21} 0.89] 1.98] 1.76] 0.81] 3.20} 2.38/—1.33|—0.36) 1.36} 3.06); 1778
1779 ||—2.51] 1.43) 2.27] 2.89) 1.88|/—0.34|—0.38] 0.95) 1.40) 2.18) 1.47| 3.74|| 1779
1780 ||—0.83/—1.52) 2.87|—0.92] 0.87| 1.30] 0.64] 1.65) 1.32) 1.25) 0.25)—0.75|| 1780
1781 ee .. | 1.52] 1.88] 0.82] 1.52) 0.48] 2.36] 2.45'-1.03) 0.53) 0.56)| 1781

(

1782 2.46|—2.93| 3.32) 3.15] 3.74] 1.92] 2.02|—0.28} 0.80|—1.67|—2.72|—0.32|| 1782
1783 3.48| 2.22/—0.95| 0.26] 0.93] 0.92] 1.73) 0.45) 0.13) 1.00)—0.34|—2.38)|) 1783
1784 ||—4.07|—3.45|—1.69|—2.76| 1.67) 0.60| 0.23) 0.34) 2.21/—2.46) 0.36)-1.21)| 1784
1785 ||—1.20|—2.85|—6.49|—4.37|—1.08|—0.83|—1.42|—1.91| 2.05|—0.77| 0.28) 0.10)! 1785
1786 0.66| 0.04)—2.05| 1.32)-1.54| 1.28|—2.31|-1.85/—1.30|—1.93|—2.68|—0.18 || 1786

| 1787 ||—1.03] 4.29) 0.75|—1.53|—2.51| 0.92/-1.31| 0.36] 0.07| 1.78] 0.89] 2.06|| 1787
1788 1.86|—0.61|—0.30|—0.59|—0.35) 0.88] 1.66|-1.53| 1.44/—0.20/—2.14|-8.30); 1788
1789 ||—-1.93} 1.41\—2.90| 0.64] 1.62|—1.30|—0.29 |—-0.28|—-0.53| 0.27) 0.25) 0.64) 1789
| 1790 1.99| 1.73| 0.91|-1.21| 1.20] 1.42|—1.49|—0.08 |—-0.87/—0.37|—0.26| 0.89) 1790

1791 3.24} 0.14) 1.00] 1.81|/—0.76|/—0.35|—0.35| 1.14)-0.15) 0.50|/—2.43/ 0.84!) 1791
F

The numbers without sign must be subtracted; those with the sign — must be added

97

662 LXXXIV.
South Germany. — RartisBon (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

Year. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec.

Cc O° ° ° O°

Oo Oo ° Oo ° ° °

1792 ||—0.57|—0.21| 1.41] 1.17|/—1.12| 0.87| 0.66] 0.88)—1.01] 0.05) 0.17) 0.89
1793 ||-1.17} 1.26) 0.53|/—1.81!—1.23|—0.76| 1.56) 1.09)—0.47) 1.87) 0.95] 1.26
1794 2.30; 3.01} 3.05) 3.04) 1.19; 1.69] 2.85/—0.80|—1.00| 1.24] 0.67/—0.78
1795 ||—5.05|—0.89|—0.10} 1.96/—0.82} 1.39)—2.22| 0.29) 1.08) 3.11|—0.98) 2.26
1796 4.26| 1.59|/-1.63|—0.77|/—0.25| 0.05] 0.47] 0.93] 2.24) 0.28|—0.38/—2.04

1797 1.46} 1.52/—-0.17| 2.09) 2.60)—0.72| 2.14) 1.73) 0.75) 0.06] 1.00) 1.59
1798 1.88) 1.94] 0.18} 1.02} 0.66} 1.65) 0.50) 1.26) 1.08|—0.73|—0.68|—2.69)|
1799 ||-5.61| 0.14/-0.29|-1.87/-1.37|—0.83 |—0.91 |—2.86|—0.60|—0.23/—0.35/-3.81
1800 1.15|—0.63|—2.62] 4.66) 1.80/—1.42| 0.32] 1.53) 0.43)—0.69} 1.30] 0.63

1801 2.72| 0.10} 1.82] 0.76) 2.45|—0.75|—0.30/ 0.13) 1.15) 1.60} 1.45] 0.81

1802 |/—3.20/—0.90| 0.29] 0.62] 0.16) 1.66|—0.04|} 2.80) 0.73) 2.40} 0.63) 0.71
1803 !|—1.24|/—2.05|—0.06| 2.70|/—1.78|—0.31| 1.70} 1.31/—0.96|—0.33] 0.29; 0.93
1804 |; 3.84)—0.86/—1.18|—0.49| 1.17) 0.88) 0.29/—0.14) 1.27) 1.09|—0.71|/—1.68
1805 ||—1.41|—1.00|—0.34/—1.27 |—1.76|—0.88|—0.88 |—1.60} 0.74/—2.03|—1.81/—0.2]
1806 4,.22| 2.45) 0.40/—2.24| 2.47) 0.16/—0.49/ 0.15: 0.86) 0.04} 1.94] 3.58

1807 1.19| 1.18|-1.17|-1.32] 1.24] 0.46] 2.87] 4.63|-0.94] 1.58] 1.03] 1.54|] 1807 ||
1808 1.08 |—0.73|—2.79|—1.93} 2.02/—0.45| 1.61] 1.19] 0.33|/—1.97|—0.23|/—5.46|| 1808
1809 0.33] 2.19)—0.40|—2.92] 0.71/—0.25| 0.02) 0.23|—0.31/—0.76/—0.86| 0.93]; 1809
1810 ||—1.72|—2.39| 0.86/—0.63|—0.05|—1.00|—0.41| 0.17) 2.72] 0.52) 0.04) 1.89]} 1810
1811 |/—2.93|—0.16} 2.09|} 1.48] 2.23) 2.85) 1.75] 0.24) 0.43) 2.24) 1.43/—0.25|| 1811

1812 |\—1.33) 1.05) 0.28|—-2.87) 0.13|—1.15|/—2.18|—1.44|—1.39| 0.60|)—1.99|/—4.72|| 1812
1813 ||—3.03} 0.99|—-1.15) 0.46/—0.60|—1.86)—1.73 |—2.10|—1.47|/—0.50|—0.75|—0.33)| 1813
1814 ||—1.37|—4.71|—2.93| 0.49/—2.79 |—2.39|—0.12|—1.12|—2.45|-1.50) 0.65) 1.77)| 1814
1815 ||—1.30| 1.05} 1.18/—0.37|—0.46|—0.74 |—2.23|—2.07|—1.35|—0.70|—1.37|—2.26|| 1815
1816 1.36|/—1.83|—1.23|—0.93|—2.69|—2.21|—2.42|—2.56|—2.04|—0.93)—1.49|—0.75|| 1816

-51| 2.42)/—1.14)—5.01/—1.93] 0.61|—1.79|—1.89} 0.56|—3.22| 0.63|—0.70|| 1817

1817 2
1818 2.08} 0.29|/—0.16] 0.27/—1.72)}—0.02 |—0.48 |—2.27|/—1.09/—0.71| 0.41/—2.08|| 1818
1819 1.49} 0.60) 0.64)/—0.09|-0.76) 0.15}—0.05|—0.35|—0.28|—0.78|—0.99|—1.34|| 1819

') 1820 ||—2.43|—0.35/—2.26) 0.38|/—0.47|/—2.89|—1.66| 0.93|—2.28|/—1.22/—1.63|—1.66|| 1820
1821 1.17|—3.06|=1.51| 0.99 |—2.48|—3.01 |—2.77|—1.18|—0.06;—0.99| 1.51] 2.53]| 1821

| 1822 2.21! 0.63) 1.92] 0.26) 0.53] 2.43} 0.49)/—0.87|—0.56| 0.73] 0.48/—2.29]} 1822
1823 ||—4.17) 0.86! 0.11/—1.72| 0.20/—0.97/—1.05| 0.43) 0.38} 0.02/—0.61) 1.05|| 1823
1824 0.92) 0.38/—1.02|—2.10|—1.74|—1.07|—0.14/—0.51| 0.97/—0.26] 1.44] 3.93]] 1824
1825 2.80} 0.39|/-1.05} 2.12| 0.93] 0.56) 0.51; 0.32) 1.31] 0.21] 3.09} 4.15]| 1825

1826 ||—3.57|—0.34| 1.39] 0.17/-1.04) 1.05] 1.99] 3.61] 1.61] 1.38|—0.28] 0.92|| 1826

1827 || 0.09/—4.95| 1.00) 1.31) 1.20) 1.05) 2.06/-0.57| 0.93) 1.35/-1.30) 2.93|| 1827
1828 || 2.12] 0.27) 0.51] 0.31/—0.77} 0.39] 0.85|—2.47|/—1.95'—0.20| 0.61] 2.28]/ 1828
1829 ||--0.85/—3.13|—1.38) 0.20/—-1.14/—-1.11 —0.20|—2.37|—1.35/—1.41|—3.79|—5.79|| 1829
1830 ||—-5.98|-3.61| 1.17] 0.77/—0.12|—0.94] 0.50/—1.28/—1.05/—0.88) 1.14/—0.58]/ 1830
1831 |/—2.09|—0 82) 0.70] 3.60|—0.48|—1.36|—0.09|—0.12/—1.57| 2.40) 2.27) 0.26]} 1831

1832 0.77) 1.28) 0.09} 0.21|—2.45/—0.87/—1.18) 0.59/—0.98; 0.16|—0.71| 0.25|} 1832
1833 ||-3.05| 3.32) 0.21|—-1.45! 2.29) 1.06/—1.70|—3.06/—2.01|—0.90) 2.78; 3.95); 1833
1834 5.52|—0.43!—0.25/—1.69| 0.99) 0.44) 4.89) 2.48] 1.21) 0.50} 0.74) 1.36]; 1834

Means. ||—2.42 —0.09| 3.09) 7.55 11.94 13.72) 14.88 14.62/11.69) 7.11) 2.22 —0.71|] Means.

The numbers without sign must be subtracted ; those with the sign — must be added.

F 98

_—— ——_——

| |

1814
1815
1816

Jan. | Feb.

° fo)
0.64/—1.23
—1.41| 1.64
2.02] 3.72
—4.88) 0.36
6.17} 1.90

2.46
0.65
—3.46
3.03
3.95

0.08
1.44
1.77
—0:92
0.97

—0.02
—1.90
—0.98
—0.28

2.77

—2.55
—0.81

4.61
—1.03
—2.18

0.76
1.95
1.56
—1.56
—3.01

1.58
—1-23
3.64
—2.45
0.49

—2.36
—2.25
—1.96
ee

0.69

1.26
0.28
—3.96
1.26
—2.37

3.351
2.67
—0.61
—1.64
2.13

1.47
0.40
1.54
—0.06
=2.72

aol
—2.76
0.79
1.92
—4.81

1.58
1.25
0.79
—0.37
1.06

—0.49|—5.36

aoe

LXXXV.

SoutH Germany. — SturTtTearp.
For Reducing the Monthly and Yearly Means of Single Years to the Means derived

March.| April.

° °
1.78) 1.36
0.37/—1.36
2.76| 3.26
0.65) 2.81
—2.51|—0.67

—0.27
0.69
—0.78
—2.04
1.98

1.88
1.16
—1.30
4.56
0.24

0.80} 2.13
—1.31} 1.49
—1.05|—0.22
—0.60|—1.38
1.10|—1.99

—2.43
—3-55
0.69
2.11
2.31

Sele!
—1.35

—4.12
0.97

—0.23
—0.42
—3.67

2.15
—0.60

—3.17
0.53
1.09
0.39

—0.68

—0.71|—3.71
0.41] 1.33
0.89) 1.21
—2.16! 1.31
0.19} 1.52
0.51
—0.77
—1.61
1.85
0.19

2.61
—0.05
—0.89
—1.36

1.16

1.22
0.54
0.46

1.47
0.61
—0.58

from Series of Years.

Degrees of Reaumur.

May.

°
— 12
—1.24
0.41
0.64
—0.32

1.16
0.66
—0.89
2.03
0.94

0.25
\—2.28

0.78
—2.16

—2.58|

1.37

—1.02
1.96
0.84

—0.25
1.41

0.64
0.13
|\—2.14
0.71)

—2.22|

eras
—().82

0.29
—0.05
i—1.98

1.43
0.92
—1.05
0.27
—0.93

1.60
0.43

June. | July.

°
1.04
2.52
2.75

—1.01

—0.36

°
—0.30
—0.31
1.30
1.43
0.10

2.86
0.14
—0.98
0.00
0.91

—1.30

1.21
—0.75
1.81
—0.54

—0.24

1.21
—0.35
—1.28
—0.62

1.53
0.05
0.92
—1.35
—0.27

—0.21
—0.98
—0.65
—0.95

1.41

2.15
0.54
—0.36

0.75

0.37
—1.45
ee
—0.412
—2.63

— Io)
—1.96

0.26
—1.95
—2.415

—1.5-4
0.15
1.02

—1.37

OF

0.92
1.06
0.36
SO
—2.26)

2.90
—1.42
—0.98

0.26

0.54

0.08
—119
0.30
0.19
1.70

1.10
1.02)

0.23
0.97

\-0.36

—0.26)

2.34

—0.61! 0.45)

1

Aug. | Sept.

° °
1.70|—0.70
1.84/—0.84
0.12|—-1.34
1.33} 1.93
0.23] 2.34

1.04
1.56
—0.04
0.84
2.32

1.01
0.66
0.32
0.79
1.42

0.62
—1.78
2.88
0.38
—0.27

2.22
1.28
—0.66
—1.44
—0.59

—0.74
—0.34
0.30
2.08
—0.04

3.23
0.77
0.16
—0.48
—0.38

—0.49
lacs
—1.56
—0.48
—0.85

—-1.17
—3.00
—0.76
—1.44

1.08
—0.70
—0.92
—1.84

0.77

—0.97
—0.91
0.36
1.10
0.15

—0.85
0.25
—0.39
0.02
1.78

—0.48
—0.38
0.68
—0.61
1.51

—0.45
—1.10
—1.13|

0.08
0.07)

Oct. | Nov.

°
—0.73
0.66
0.85
—0.49
—0.87

c
1.30
1.71
0.32
3.69
0.13

0.36
0.53
—0.15
—0.37
2.89

1.82
0.33
0.42
1.61
1.30

2.08
—0.90
0.74; 0.56
—2.73|—2.47
0.03] 1.67

0.81
0.46

1.71
—].49
—1.05

0.09

3.02

1.37
0.17
\—1.65
1.44
1.28

0.01
—0.34|
—1.34

0.03
Utz

—2.28

0.69
—2.30
—2.45

—3.25
SU
—0.02
—l.11
—0.62

1.01
1.62
—0.95
—2.81
2.42

1.33
—1.03
0.44
—0.64
1.43

1.82
—1.37
2.52
1.27
Si

0.67
—0.61

—2.41
Ola

—1.50 —1.66 (72.88 |—-5.91

—1.15|

|
Dec.

Oo
0.44
2.10

—1.72
3.76

—2.18

3.02
—2.05
—4.70
—0.18

1.46

1.41}
1.36)
—1.56
0.06
4.85

—0.94
—1.02
2.12
0.97
—0.04

—4.81
—0.70

2.13]
—1.44
—0.82

—0.49
—2.04|
1.16
—0.66
3.25

—3.09
1.70)
3.81
2.74
0.54

2.98
1.19

663

1792
1793
1794
1795
1796

1797
1798
1799
1800
1801

1802
1503
1804
1805
1806

1807
1808
1809
1810
1811

1812
1813
18]4
1815
1816

1827
1828
1829

The numbers without sign must be subtracted ; those with the sign — must be added.

99

Year.

664

For Reducing the Monthly and Yearly Means of Single Years to the Means derived

LXXXV.

Sourn Germany. —SturrearD (continued).

from Series of Years.

Degrees of Reaumur.

| Year. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. el Oct. | Nov. | Dec. Year.
| a e a L e _
I) Oo Oo Oo Oo Oo Oo Oo Oo Oo Oo ° oO
‘| 1830 ||—6.40/-3.47| 1.62] 2.06} 0.90|—0.38] 1.05} 0.00/—1.43/—0.89| 0.90/—0.74]| 1830 |:
1831 |/—0.73| 1.25} 1.68) 1.44/-0.11/—0.09| 1.22/—0.10|—1.15| 2.92) 0.15] 1.26]| 1831
1832 0.10|/—0.76|—0.64| 0.13|—0.93/—0.59|—0.22| 0.75/—1.05|—0.78/—1.41| 0.05/| 1832
1833 ||-2.56| 2.99'~-0.99|-1.31| 3.38] 2.06/—1.46|—2.81|—1.35|—1.03/—0.13] 3.18]] 1833
1834 5.05| 0.14/-0.60/-1.87| 2.16] 1.33] 2.74] 0.90] 1.73/—0.06| 0.12/—0.27|] 1834
1835 1.53) 1.20 —0.15'-0.90/—0.53| 0.28] 1.62/—0.21| 0.60/—1.20|—3.22/—2.85]|| 1835
1836 0.45|—1.27| 3.18|—0.90|-2.14| 0.64] 0.22] 0.46/-1.21] 0.47/-0.01] 1.04|] 1836
| 1837 0.90] 0.24/-2.68|—2.84|—2.23] 1.16/-1.19| 1.17|—1.94/—0.60/—0.40| 0.04/| 1837
1838 ||—4.43/-2.08| 0.21|—2.32/—0.45/—0.03|—0.36/—0.90| 0.64/—0.36| 1.03/—1.34|| 1838
1839 0.78 |—0.03|-1.31|—2.71/—1.07| 2.30] 0.58/-1.55| 0.64] 0.84] 1.07] 1.95|| 1839
1840 1.82] 0.15/-2.90| 1.36] 0.29] 0.16|—1.42|—0.23|—0.26|—2.39] 1.10/—5.61|| 1840
1841 0.89/-1.98| 2.09| 0.53] 3.42/-1.55/-1.83/—0.69| 1.65] 1.24] 1.22] 2.85/| 1841
'| 1842 |/—1.50|/-1.05| 1.36|-0.47]} 1.35] 1.74] 0.35] 2.64] 0.07/—2.47/-1.82/—0.20]| 1842
1843 2.07) 1.54] 0.15] 0.60/—1.06|/—1.48|—0.68] 0.20/-0.15] 0.02] 0.67] 0.23]| 1843
1844 0.31/—0.91|—0.30| 1.42/—1.01| 1.39|-1.99|-2.17| 0.56] 0.39] 0.91|-3.18|| 1844
Means. |/—0.80| 1.64] 3.97] 7.80] 11.87] 14.03} 15.48} 15.02]12.05] 8.05} 4.11] 1.25 Means.
LXXXVI. Sourn Germany — CaRLSRUHE.
!
| 1779 ||-3.98| 1.18| 1.26] 2.19| 1.14|-0.64| 0.80] 1.72) 2.40/ 2.75] 1.71] 2.94/[ 1779 |)
| 1780 |/—2.23|-2.20] 3.27|-1.17] 0.52] 0.41] 0.27] 1.39] 0.18] 0.83] 0.00|—1.32|| 1780
| 1781 0.45] 1.82] 0.99] 2.26] 0.87] 1.63] 0.63) 1.20] 1.11/—0.94/—0.38] 1.09]] 1781
1782 3.13|—3.95|—0.67/-1.10/—1.44| 0.93] 1.00/—1.62/—1.69/—2.08|—3.90|—1.07|| 1782
1783 3.33] 1.35/—1.60| 0.05/—0.14| 0.47| 1.69/—0.38/—0.71/—0.35|—1.04/—3.26]] 1783
1784 ||—4.85|-3.17|/-1.67|/-2.72] 0.42/—0.13/-0.48|/—1.97|—0.63|—3.71/—0.71/—2.14|| 1784
1785 |'—0.27|-3.06|—5.49|-3.26/—1.28/—0.44/-0.46] ..| ..| .. j-0.63/—0.60]] 1785
1786 0.76|—1.35| 1.20|-1.77/ ..| .. |-1.97/—3.13/—0.18]|| 1786
1788 Pet | aie aa lee cs sd tlghcosedlus ceedlae ce dlee ced umeat alae = CeOol| MLSS
| 1789 ||-0.91| 1.74!-3.15 2.19|—1.49| 0.34|-0.14'-1.17| ..]| ..| 0.91]| 1789
| 1798 SAM Hee ee Sol 6:201° 0:89] 2.0.59) 0.55] 2 Osa e ool as
| 1799 ||-3.09| 0.92|—0.59|-1.15|/—1.43|—0.70/—0.60| 0.20) 0.01] 0.12,\-0.12|-4.22| 1799
| 1800 2.53|—-1.60|—2.25] 3.40] 1.46/—2.10/-0.26] 1.20] 0.89|—0.43) 1.15 0.21] 1800
1801 3.13| 0.68} 1.95] 0.32! 0.98|/—-0.98|—0.15|—0.49| 0.76] 0.98] 1.17] 2.21)| 1801
' 1802 ||—-2.69) 0.64) 0.83} 1.08/—-0.60) 1.37|-0.97| 2.33] 0.23] 1.38/-0.38) 0.53|| 1802
' yg03. |/—1.27/-2.92!-1.30| 1.11 /—2.75/-0.71| 0.63] 0.54|/-2.37/-0.90| 0.52! 1.99]] 1803
1804 4.53 —1.30 —-1.12'-0.47) 0.94) 0.96|/—0.56/—0.70} 0.10] 0.90 0.08!-2.05|| 1804
1805 ||—1.49 —0.61/—0.70|—0.89/—1.66|—0.76 -1.21|—1.17) 0.16'—2.18|—2.92/—0.39|| 1805
1806 4.11} 1.89) 0.58/-2.23| 1.41|—-0.09) 0.03/—0.35/—0.36|—0.67| 1.62) 4.71]} 1806
The numbers without sign must be subtracted; those with the sign — must pe added.
F 100

LXXXVI. 665
South Germany. — CirisruneE (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

Jan. | Feb. |March.) April. | May. | June. | July. | Aug. | Sept.

° ° ° ° O° ° ° ° ° ° O° O°
1807 0.02} 1.11|—2.83/—1.34| 1.19|—0.28] 2.34] 3.15|-1.57] 1.30] 1.21/—0.53|| 1807
1805 1.38 |/—1.25/—3.54|—1.63| 2.40/—0.41| 1.94] 0.96/—0.54|—1.28|/—0.24/—3.75|| 1808
1809 1.24) 3.25) 0.52/—3.16| 0.41|/—1.22|—0.61|—0.33/—0.80/—1.36|—1.90| 1.60); 1809
1810 |/—3.19|—2.78| 1.26|—0.17|—0.60|—0.62)—0.65/—0.46| 1.58|—0.05|} 0.84) 1.69)| 1810
1811 |/—2.40) 1.17) 2.79] 1.65] 2.32) 1.55] 0.78/—0.29) 0.53) 2.92] 1.21] 0.48]} 1811

1812 |/—2.09| 1.47|—0.16|/—2.96} 0.83|—0.50/—1.53|—0.27|—0.24) 1.33/—1.42/—3.80|| 1812
1813 ||—0.84| 2.15) 0.57) 1.50} 0.12|—1.01/—1.75|—1.78|—1.15| 0.27|—0.11/—0.89|| 1813
1814 ||—1.51|—3.24|—1.56| 1.82/—1.68/—1.66| 0.07|—1.12|—1.07|—0.68| 0.82] 2.67|| 1814
1815 ||—2.35| 2.31) 2.67) 0.75] 1.10|—0.57/—1.75|—1.03| 0.09) 0.62/—1.99|/—1.02}| 1815
1816 1.38|/—2.00|—0.27} 0.27|—2.23|—2.48 |—2.61/—2.16|—0.89|—0.33|—2.14| 0.17|| 1816

1818 2.91) 1.12} 0.59) 1.53/—1.44) 1.00) 0.34|—1.01/—0.50|—0.63} 1.49/—2.11]| 1818
1819 1.85} 1.30) 0.75) 1.42} 0.49) 0.15} 0.42] 0.64] 0.49)—0.15|—0.75| 0.31|| 1819
1820 |/-1.09| 0.55|/—1.35] 2.19) 0.22|/—2.16|—0.96| 0.66/—1.20|—0.61/—1.80| 0.00|} 1820
1821 2.31|—1.59| 0.73} 1.78|—1.87|—2.01/—2.03| 0.14) 0.17\—0.68) 2.72] 3.52); 1821

1822 2.52) 2.96} 4.04) 1.75) 2.11] 3.77) 0.56|—0.14| 0.46) 1.19) 2.66/—1.31)| 1822
1823 ||—2.23] 2.20] 1.05/—0.09| 1.23|—1.02/—1.14| 0.87) 0.24|—0.27|—0.11| 2.95)) 1823
1824 1.39} 1.98|—0.10|—0.89|—1.13|—0.65| 0.32/—0.22| 1.04) 0.66] 2.68] 4.09|} 1824
1825 1.92} 0.28|—0.76| 1.43/—0.15|—0.41| 0.85) 0.49) 1.15) 0.15] 1.51] 3.05]} 1825
1826 ||—-3.48| 1.35) 1.13) 0.20/-1.25| 1.06) 2.12] 2.86) 1.75} 1.94/-0.21| 0.93|| 1826

1827 ||—0.55/—5.10} 1.19} 1.50} 1.25] 1.01] 2.06) 0.00} 1.15] 1.34/—2.01| 2.85]| 1827
1828 3.18] 0.41] 1.17} 0.82) 0.74] 1.19] 0.91|—1.22| 0.48) 0.28/—0.33] 1.85)| 1828
1829 ||—2.12/—2.33/—0.05| 0.72/—0.04) 0.21) 0.50|—1.17|—0.88|—0.60|—1.88|—4.97)|| 1829
1830 ||—5.83/—2.98| 2.14] 2.21! 0.81|/—0.22| 0.86|—0.13)/—1.01|—0.17| 1.31/—0.32)| 1830

|

1831 |/—0.98} 0.96} 1.68} 1.83|—0.50|—0.61| 0.38) 0.40/—0.81] 3.26) 0.30] 1.64)| 1831

1832 0.10|--0.27| 0.23} 0.96|—0.88/—0.49|—0.01| 1.02)/—0.59| 0.18|—0.68} 0.95|| 1832
1833 |/—2.63) 3.41/—0.71/—0.78| 2.94] 1.45|/—1.24|—2.23|—1.08/—0.17| 0.51] 4.43)| 1833
1834 5.74) 0.29) 0.76|—1.12| 1.87) 1.12) 2.76] 1.35] 1.82] 0.53] 0.79] 0.29|] 1834
1835 1.77) 1.74) 0.11)—0.90|—0.68| 0.13; 1.46|—0.17|—0.03 |—0.83 | —2.92|—2.23}| 1835
1836 0.43|-0.85| 3.27|—0.66|—1.99| 0.47] 0.21} 0.47) 1.67] 0.82) 0.66] 1.56|| 1836

1837 1.30} 0.80|—1.86|/—2.33|—2.05| 1.26|—0.86) 1.24/—1.66) 0.28] 0.46} 0.72|| 1837
1838 ||—4.35|-2.13) 0.21|—2.36/—0.33/—0.21/—0.36/—1.20| 0.44|—0.02| 1.10/—0.52)| 1838
1839 0.88) 0.67|—0.73|—2.24/—0.54| 2.28} 0.16|/—0.17| 0.09] 1.20) 1.49} 2.20]} 1839
1840 1.37| -0.69|—2.52| 1.28|—0.51| 0.23|/—1.39) 0.34|/—0.22/—2.04| 1.81/—5.32|| 1840

1817 || 3.56) 2.16|—0.36|-3.14|—-1.63| 0.87/—-1.47|-1.40| 1.60/—2.82} 1.78} 0.13)| 1817

Means. ||-0.17| 1.95| 4.39] 8.31! 12.40] 14.43! 15.80) 15.41| 12.60} 8.30) 4.16] 1.35); Means.

‘The numbers without sign must be subtracted ; those with the sign — must be added.

F 101

666 LXXXVII.
North Germany. — Bertin.
Mor Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. Year. \

° ° 0 Oo oO oO ° © ° oO

0.21} 1.50) 0.69) 1.45) 2.38) 3.13] 1.86} 0.08) 0.66] 2.09)—1.02|| 1719
1720 2.27| 0.40/—0.14| 0.70} 1.34) 0.94) 2.01] 0.31) 0.10) 1.62)—0.03) 1.47|| 1720
1721 2.38/—1.80|/—1.53| 2.23|-0.91) 1.21|/—0.67/—0.17) 0.54) 0.40) 1.69) 0.07|) 1721
1728 1.50/—2.28) 2.39] 0.65} 1.24] 0.26|—0.38|/—1.36|—0.10| 0.66)—0.58/—1.51|| 1728
1729 = =||—3.18|—1.46|—3.57|/—2.11} .. Sur e. ve o- ee ee ee 1729

1730 1.64] 0.20] 0.29} 0.70} 0.00} 0.12|/—0.62)—0.03|—0.69|—2.55) 1.99|/—0.48|| 1730
1731 ||—2.00|—1.78|—0.67 |—1.67 |—1.33 |—0.89 |—1.44|—0.62|—0.25| 1.85] 0.67) 0.26)| 1731
1732 |/—1.50} 1.34} 1.05] 1.34] 0.29)—1.54|—-1.95|—0.98|—0.84/ 1.14/—0.78|—3.99)|| 1732
1733 2.69| 2.54] 0.86] 1.59|—1.77|/—2.71 |—0.38|—0.97 |—2.02/—0.53] 0.21] 2.46|| 1733
1754 0.40] 2.51] 1.86} 0.55|/—0.54/—1.26|/—0.62/—0.93|—0.54| 0.65|—2.85|/—1.03]| 1734

1735 1.79} 0.30] 1.81) 1.49/—0.87|—0.33|—1.38|—0.84| 0.91|/—1.01/—1.07|—0.17)| 1735
1736 ||—0.08|—0.92|—0.73| 0.85|/—0.88|—0.87/—0.24| 0.64/-0.98| 0.23)—0.09| 1.18]| 1736
1737 1.83] 0.55] 1.57/-1.86| 0.77) 0.11/—0.77/—1.65|—0.10|—0.39|—0.83|—0.05|| 1737
1738 |/—0.55| 0.55} 1.11] 1.54/—0.08|—0.42/—0.79|—0.38|—0.05| 0.88)—2.21} 0.90]| 1738
|

1739 ||-0.17| 2.06} 1.11|—1.65| 0.64/—0.96| 0.99|—1 23) 0.91|—2.62)/—5.35|/—0.01|| 1739

1740 ||-6.61|-—6.54|—3.28 |—3.45|—3.49 |—1.70|—0.96|—0.62| 1.62|—3.12|—2.35|—0.18|| 1740
1741 |/-0.93| 1.88)/—0.71|—1.38|—1.90|—1.59| 0.17/—0.54/—0.20) 1.22) 1.77|—0.16|| 1741
1742 |/—1.23| 1.08|—0.99|—2.16|—1.83|—0.72|—0.66|—1.26|—1.78| 0.19) 0.70|—3.22|| 1742
1745 1.32] 0.99/—0.53|—-1.94| 0.28] 1.05/—1.46] 0.82/—0.50/—1.44| 2.77) 0.84|| 1743
1744 ||—1.98|/—2.42|—0.09] 2.33] 0.10|-1.47| 0.25|—0.60} 0.94) 2.10} 1.25/—0.39|| 1644

1745 {/—1.92|—1.26/—0.10} 0.20) 0.73} 1.01) 0.01} 0.17) 0.10] 1.15) 2.17/—2.36]| 1745
1746 0.12} 0.03/—1.88|—0.39| 0.43|—0.72| 1.41/—0.43] 0.44/—1.06/—0.53]} 1.89]! 1746
1747 ||—0.17| 3.49|/-2.09} 0.70|—0.67| 2.34|—0.53) 0.18} 1.43] 0.43) 0.21] 1.04]) 1747
1748 ||—1.17|—1.70|—2.29| 0.22} 1.53] 2.11) 0.56] 2.85|—0.14; 0.00) 1.79] 3.19]| 1748
1749 2.28] 0.47/-1.52|/—0.14| 1.58) 0.21] 0.39} 1.64) 0.35) 0.05|/—0.63) 1.28|| 1749
1750 1.19] 3.22) 3.87] 1.26] 0.50} 1.06] 1.97] 1.56) 0.26|/—0.55) .. |—0.06)| 1750
1751 ||—0.45|—1.70| 2.79|—0.86| 3.59] 2.39] 1.78) 3.12] 0.42/—0.04) .. e 1751

Means. ||—0.19| 0.69} 2.65] 6.51| 10.63] 12.82] 14.02| 13.14/11.06] 6.53] 3.15| 1.24|| Means.

1755 ||—4.56|—6.47) ..| 0.54) .. o- a | Os 20) er 6 we e+ | 2.14]) 1755
1756 4.13] 2.63] 1.85) 1.77) 0.37] 2.55) 1.50/—0.35|) 1.61] 1.62/—0.38/—1.43|| 1756
1757 1.17} 2.37) 1.71} .. |-0.39| 1.47] 3.25] 0.22|/—1.70/—2.88| 1.21/—1.25|| 1757
1758 = ||—2.57/—0.17| 0.13|—0.21] 1.08} 0.18|—0.86] 0.55|/—1.11|/—0.97} 0.16) 0.38]| 1758
1759 -26| 1.79) 1.18/—0.01/—1.45| 0.87} 1.15) 0.60/—0.45|) 1.09|—2.21|—3.85|| 1759

1760 |)/—0.56|—1.48|—0.81} 0.34] 0.33] 0.57/—0.29| 0.03} 0.87) 0.98} 0.12] 2.05|| 1760
1761 0.97| 1.65} 2.51/—0.01) 1.55] 1.95|/—0.62} 1.88] 2.30'—-1.02/—0.12|/—3.08]| 1761
1762 2.11;—0.01|—1.88| 1.88) 0.42) 0.27|—0.19|—1.45] 0.23/—1.34/—0.32|—1.82|| 1762
1763 ||—2.25| 3.02|/—0.40/—0.55/—0.34|] 0.17} 0.92| 1.32/—0.86|—0.87|—0.25| 2.67]| 1763
1764 2.91) 2.53/—0.10|—0.30|} 1.71/-1.94| 1.43/—0.60/—1.70|/—0.63|—1.32|—1.54|| 1764

1765 1.64|—2.90| 1.70} 0.78|—2.50/—0.88|—1.92) 1.12/-1.16) 1.20) 0.15} 0.03|| 1765
1766 ||—0.10;—0.12) 1.01] 2.07) 1.17) 0.30 —0.36'—0.25| 0.73/-0.43 | 1766
1767

5.54 1.74| 0.01|—1.58/—1.03|—1.65'—0.23' 0.88) 0.42} 0.95: 2.03:—1.75]| 1767 |
_——————————————

The numbers without sign must be subtracted ; those with *he sign — must be added.

F 102

LXXXVII.

North Germany. — Berwin (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derived

667

from Series of Years.

Degrees of Reaumur.

| Year. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. Bl cidl calle te ae
° ° ° ° °
1768 ||—3.52|—0.98|—1.25|—0.11/—0.68 =H) 06 0. 28 eh 0s I 03 ~0. 48 0.54 1768
1769 1.22|—0.74| 0.75] 0.14/—1.01/—1.01|—0.71|—1.07| 0.58)/—2.26| 0.26 1769
1770 ||—0.20/—0.21|—3.16|/—1.09|—0.11|—1.20/—0.35|—0.08| 0.62] 0.81] 0.16 1770
1771 =‘||—1.24|—3.28|—3.40|—3.27| 2.04|—0.21|/—0.82|—2.12/—0.46| 0.76|/—1.47 1771
1772 0.66} 1.20) 0.86|—0.86|/—2.50/—0.10/—1.40|—0.41} 0.60) 1.62] 1.89 1772
1773 2.50|—1.00/—0.61| 0.49] 1.37/—1.22|—0.85| 0.06) 0.57] 1.89/—0.92 1773
Means. ||—0.13| 1.64) 3.87] 7.71/11.94| 15.23] 16.18] 15.34] 12.12| 7.73] 4.38] 1.85|| Means.

1774 1.50} 2.26) 2.29) 1.56/—0.05} 0.69)/-—1.56|—1.92|—-1.61| 0.71|—3.70|—0.75|| 1774

| 1775 0.95} 3.20) 2.53|/—0.65|/—0.72] 3.26] 1.88] 1.61] 2.00] 1.23/—0.84| 2.16|| 1775
1776 ||—5.55| 2.42) 2.10/—0.13/—2.11| 1.19} 1.21] 0.32} 0.12)—0.47| 0.70} 0.54); 1776

pee 0.04|-1.67| 0.67|—1.12| 0.52} 0.04/—0.60)/—0.01/—1.71) 0.23] 2.23] 0.75)| 1777

' 1778 ||-0.58/-1.72| 1.09] 1.98] 0.67| 0.30] 1.02] 0.66|-0.67|-1.69] 1.44] 3.84|| 1778

1779 0.33] 3.82] 2.99) 2.39] 0.61/—0.30| 0.74] 1.71) 1.59] 1.95) 0.90) 2.26|| 1779
1780 ||—1.06|—2.02| 3.37/—-1.27] 0.72] 0.24) 0.45] 0.99|—0.03} 1.46|—0.34|—0.70)| 1780
1781 ||—0.44| 0.53) 2.05) 1.85] 1.19) 1.97] 2.02] 2.56) 1.60/—0.39| 0.80) 0.01]} 1781
1782 3.15|—2.86|—0.39|/—0-87| 0.33] 1.78] 1.52) 0.21] 1.75|/—0.30/—1.13| 0.78) 1782

|| 1783 3.19| 3.67/—0.58] 0.86) 1.38) 2.71] 1.45] 0.71] 0.36] 0.354] 0.50/—1.51 1783
1784 ||-3.97|—3.54/—1.68|—2.30] 0.58] 0.20|/—0.75|/—1.35] 0.02/—2.21| 1.29/—0.94|| 1784 jj

| 1785 0.47|—3.28 )—5.74|—2.54/—1.48|—0.84/—0.70/—1.12] 0.61)/—0.34] 1.09/—1.42]| 1785
1786 1.81|—0.93|—2.32] 1.60)/-1.25| 0.54/—1.71|—1.26|/—1.86|—1.97|/—3.64|—0.16)| 1786
1787 ||—0.29} 1.38) 2.05|—1.31|—0.77| 0.99|/—0.65|/—0.59|/—0.17| 1.32] 0.69] 2.07|| 1787
1788 2.46|/—1.26|/—1.47| 0.10} 0.45) 1.64) 1.64/-1.21] 1.20/—0.35/—0.79|—8.64|| 1788
1789 ||—1.93) 1.46/—4.45| 0.01} 1.85] 0.14] 0.11] 0.36) 1.85] 0.64} 0.89} 3.55]; 1789

| 1790 3.05} 2.82} 2.19|—1.67| 1.70} 0.58)/—1.13|/—0.54|—0.48/—0.44|—0.30] 1.92]; 1790
1791 3.91} 1.52) 1.47] 1.74/—-1.16}] 0.19] 0.78] 1.08|/—0.78| 0.22/—0.89| 1.35]] 1791
1792 0.53/—-1.89} 0.850} 1.45/—0.81| 0.83] 1.59] 0.46/—0.98|/—0.30|/—0.01} 1.14|| 1792
1793 ||—0.70| 2-14) 0.61/—0.68)/—0.58/—1.34| 1.68} 0.22|—0.83] 1.99] 0.99} 2.05]; 1793

| 1794 1.18] 2.56) 3.66) 3.12) 0.18] 1.77] 2.79|/—0.59|—1.62| 0.37) 1.53|—2.14|} 1794

| 1795 ||—5.23|/—0.36|—0.84| 2.88|—1.78| 2.10|/—0.92|/—0.37|) 1.27] 3.36) 0.10) 3.14/| 1795

i 1796 6-51) 0.68|—1.70|/—0.34/—0.46| 0.38) 0.48) 1.33) 1.74] 0.07/—0.60/—1.82|| 1796
1797 1.60) 1.89} 0.66} 1.09} 1.41/—0.23) 1.55) 1.26] 2.02} 0.55/—0.80| 1.81 1797 ee
1798 1.79| 1.57)—0.07| 1.29) 0.76} 1.20) 0.38} 0.92) 1.24/—0.17|—0.45|—3.54|| 1798
1799 || —2.97|—4.47|—1.65|—2.12|—2 27|—1.53|—1.05|—0.32|/—0.65|—0.70} 0.48|/—4.41 1799 |
1800 ||—1.12|—3.61|—4.09| 4.43) 2.33/—3.06/—1.99| 0.22| 0.67\—0.41| 1.47) 0.00)| 1800 |

|| 180] 1.88|—1.02| 1.84} 0.05] 3.00|—1.37|—0.61|—0.68| 1.01) 1.40) 0.93] 0.84/| 1801

| 1802 |/—1.00) 0.50) 1.65) 0.45|—2.87/-1.01/-1.54) 1.54/-0.08| 3.04/ 0.78) 1.81 1802 |

| 1803 ||—5.33| 2.02|—0.16| 2.84/—1.36|/—1.46| 2.03) 1.80|/—1.82|—0.45| 0.68|/—0.39); 1803 !
1804 1.51)/—1.48/—3.11/—-1.06} 1.04|—0.54| 0.10/—0.73] 1.17/-0. 02) —2.40/—3.92|| 1804
1805 ||—3.90|/—1.94/—0.48|—1.58| 1-36/—1.53/—1.18|—1.83) 0.55|/—3.53) |-2. 58} 1.24]; 1805

1806 3.02} 0.94) 0.19|—2.82| 0.99|/—2.26/—1.35,—0.98) 0.41|—0.12) 1.47) 4. 14 1806
| sor 1.62} 0.18!—1.97|—1.43 —0.42'—1.50| 0.42] 3.72'-2.15) 0.08) 1.11] 1. 53. 1807 ||
The numbers without sign must be subtracted; those with the sign — must be added.

F 103

668

For Reducing

Year. Jan
°
1808 0.83
1809 |/-3.31
1810 |/—0.99
1811 —2.93
i 1812 |/-1.14
1813 ||—1.20
1814 ||—2.12
1815 ||—2.81
1816 0.95
1817 2.58
1818 2.54
1819 251
1820 ||—3.08
1821 eo 2:
Means. ||—7.59
1822 3.39
1823 ||-7.56
1824 3.67
1825 3.92
| 1826 |\—3.44
h 1827 0.25
1828 ||—0.26
1829 ||—2.87
1830 ||—4.21
1831 1 be) |
1832 0.76
1833 ||—0.86
1834 4.73
1835 2.81
1836 1.37
1837 1.91
1838 ||—6.30
1839 0.79
1840 |/—0.09
1841 ||—0.01
1842 ||—1.34
1843 2.40
1844 1.00
1845 1.65
ieee —1.90)

LXXXVII.

Nortu Germany. — BERLIN (continued).
the Monthly and Yearly Means of Single Years to the Means derivea

from Series of Years.

Degrees of Reaumur.

0.19
1.57
0.34
=OD

0.30

3.67
0.25
2.45
0.92
1.98

—4.90
—0.55
—2.67
2.70

0.75

1.12
3.16
1.31
2.37
1.11

0.38
—3.63
1.50
0.65
—4.03

0.39
2.45
—0.96
—4.55

—0.15

March.

°
—3.39
309,
0.40
2.01
—1.05

0.24
—2.78
1.56
—0.68
—0.19

1.56
1.59
—0.02
0.14

3.42

—1.98
0.42
—1.98
0.23
0.91

0.93
Cog
—1.50
—6.24

2.74

April.

°
i—2.80

—].41
—0.15
—3.98

1.00
—0.45
0:21
—3.86

0.53
0.85
1.52
3.28

1.55
—1.52
—0.52

0.86
=0.19

2.29
1.22
0.41
1.53
2.21

0.32
—1.82
\—0.68
—0.91

0.07

—1.68
—1.42
—2.54
—0.07

1.01

—1.52
0.44
0.48
0.28

6.88

—3.34|

May.

O°

0.80
0.99
'-1.88

3.07
—1.20

1.00,

6.89 |

=O
2.92
0.15
—2.68
—0.49

0.22
1.00
0.91
—0.48

0.59
—0.26
—1.04
—0.15
0:24

1.98
0.33
—0.29
0.30
—0.94

—1.43
3.46
1.82

—0.86

—2.55

—1.42
—0.24
0.58
—0.03
2.51

0.75
—2.01
0.56
—1.48

ee

+} 10.92 |

June. | July.

hs
0.42
0.89
'—1.93
| 2.67
'—0.68

°
1.19
—0.48
—0.05
0.94
—2.37

—1.23
=1,99
0.61
—1.54
1.04

—1.27

1.02
—2.98
—1.32
—1.57

0.95
2.28
—2.38
Deli

13.73

0.72
1.42
—2.08
—1.51

Ds

15.16

0.77
—1.76
—0.56
—0.47

3.03

0.58
—0.78
—0.75
= 110

1.20

0.80
1.17
0.41
0.35
0.36

1.33
0.30
0.12
0.07
—1.34

—0.33
1.33
1.23
0.13
0.20

—2.40
—0.45
3.65
0.21
—1.08

—0.69
0.35
0.95
0.16

—0.88

—1.11
—0.22
0.77
0.27
—1.10

—0.54
—1.00
—1.00

0.49

—0.84
—0.41
—2.35

0.90

13.94) 15.04)

Aug.

Oo
0.69
0.36

—0.47

—0.59

—0.78

—2.07
—1.34
—1.57
—2.59
—0.55

—1.41
1.60
1.23

—0.78

15.00

—0.19
1.03
—0.58
0.05
3.00

—0.04
—-0.71
—0.56
—0.26

0.20

0.22
—3.12
2.34
—0.59
—1.49

1.20
—1.78
—0.44
—0.07
=—0:01

3.13
1.17
—1.60
—0.94

14.43)

Sept. | Oct. | Nov. | Dec. Year.
oO Oo o) ° cat
—0.54/-1.56|—1.10/—4.40|| 1808
0.29 —0.99| 0.02} 2.23|| 1809
1.16|—1.33| 0.09] 1.22]! 1810
—0.72| 2.21] 0.35] 1.50|| 1811
—1.81| 1.14/-1.57|—5.52|| 1812
—0.82|—1.30|-0.05|. 1.02] 1813
—2.23|-1.21| 0.55| 1.26|| 1814
-1.95| 0.42|—-0.69|-1.37|| 1815
—1.64|—1.23|—1.96|-0.39|| 1816
1.43|-2.57| 2.37|-0.14|| 1817
0.14/-0.58/—0.60|—0.89'| 1818
0.81|—0.41 —0.66|—2.61)| 1819
—0.75| 0.99|-1.57/-1.88]| 1820
0.91] 1.33] 3.27| 3.44]| 1821
11.83] 7.16| 2.61|—0.32|| Means.
—1.24| 1.36] 1.58/-3.18]| 1822
—0.34| 0.66! 1.01] 1.12|| 1823
1.27| 0.56) 1.96] 2.69|| 1824 |
0.54|-0.12) 1.30! 2.03]] 1825
0.35| 0.71/-0.33] 0.49|| 1826
1.09] .0.83/—2.24| 1.16|] 1827
—0.15/—0.28] 0.17| 0.47|| 1828
—0.16|/—1.62|—2.54/-8.25|| 1829
—0.57|—0.69| 1.47/-1.79|| 1830
—1.22| 1.77|-0.54! 0.11|| 1831
—1.22|—0.35 —0.63|—-0.24|/ 1832
—0.48|—0.93| 0.14] 2.48] 1833
0.74|-0.28) 0.56] 0.36|] 1834
1.22 —0.97|—2.71/-1.77]| 1835
~1.06! 1.00/—1.10| 0.26|| 1836
—0.92| 0.37) 0.72|-0.87|| 1887
1.27|-0.89/—1.14/-0.33|| 1838
1.10} 0.15] 1.10/—1.49]| 1839
—0.05| 0.09 —0.05/—-0.33), 1840
0.58) 1.29] 0.75} 1.62|| 1841
0.42|-1.55/—2.82] 0.71|| 1842
-0.64/-0.66| 1.42] 1.96|| 1843
0.36'-0.24| 0.56) 2.41/| 1844
—0.93'-0.18| 1.26] 0.33|| 1845
11.75! 797) 3.25] 1.32)| Means.

The numbers without sign must be subtracted ; those with the sign — must be added.

F

104

For Reducing

a

1784

Year.

1767
1768
1769
1770
1771

1772
1773
1774
1775
1776

1782
1783

1785
1756

1787
1788
1798
1799
1800

1801
1802
1803
1804
1805

1806
1807
1808
1809
1810

1811
1812
1813
1814
1815

—0.88

1.78
—2.37
—0.51
—5.22

2.38
0.81
—2.02
0.53
0.15

0.94
2.02
1.15
—0.71
—0.96

1.28
—0.56
—3.02

2.01
=1.79

1.90
1.75
1.04
—2.64
0.60

—0.65
0.40
0.23

—3.81

—0.67

Feb.

°
0.34
—0.14
0.79
1.64
—2.18

eink
—0.46
0.34
Us)
1.18

—0.61
2.57
—0.59
—2.27
0.06

2.21
0.63
2.27
—4.50
—2.07

0.75
1.04
—1.58

—1.47
—2.02

1.64
1.46
—0.77
0.30
—0.28

0.23
1.21
‘2.66
—41.01
1.47

March.

°
0.52
—1<01
1.44
— Ded)
—3.96

—2:53
0.35
0.87
1.72
1.49

—0.99
—0.38
—2.41
—2.96
—2.69

2.09
—1.14
1.31
—1.94
—3.57

2.82
1.90
—0.39
—1.82
0.26

—0.49
—0.55
—1.30
—0.42

0.05

2.46
—1.55
1.50
—2.15
1.82

LXXXVIII.

Denmark. — COPENHAGEN.
the Monthly and Yearly Means of Single Years to the Means derivea

from Series of Years.

Degrees of Reaumur.

April. | May.

o °
—1.49|—1.83
0.11|—0.82
0.30|—0.70
—0.77|—0.32
—3.14| 0.27

—1.72
0.33
0.83
0.21
0.73

—1.94

0.83
—0.09
—0.09
—0.87

—0.62
2.01
=1.51
—1.04
0.83

—0.63
1.97
0.24

1.52

—1.08

—0.20
0.95
2.48

—1t59
2.60

0.07
1.00
2.71
2012
1.77

2.93
seen eran
—1-:69

0.25
—2.14

0.03
—0.37
0.19
0.60
—2.69

—1.59
—0.56
—1.40
—2.52
—1-19

—0.71
—2.62

1.75
\-1.63
0.55|—1.01
0.28 '—2.99
0.30 —0.26

—0.49 —2.69

June. | July.

oO oO
—1.99|—1.40
—0.50/—0.18
—0.50)—0.42
—0.88) 0.21

1.50|—0.33

—0.51|—0.56
—0.54) 0.50
0.37| 0.04
2.13} 1.39
1.61| 2.30

3.43
2.36
0.07
0.78
1.48

0.12
3.05
—0.31
—0.33
—0.35

0.01
1.28
2.06
—0.44
iGo)

0.06
—0.93
2.00
—0.18
—0.89

—0.10
—2.26
—2.02
—0:57
—3.46

1.30
—3.12
—0.21
—0.30
—1.48

—2.28
—1.60

0.02
—0.91
—1.01

les 9
—0.17

1.26
—0.89
—0.07

0.96) 2.07
—0.97|/—2.38
—1.00) 0.44
197
—1.26

—1.87|—0.49

\-0.61

0.13)
—1.95)

Aug. | Sept.

o O°
—0.47| 0.22
—0.59|—1.37
= 1-21) —0.17

0.36) 1.11
—2.04/—0.90

—0.59| 0.83
0.81} 0.45
—0.65|—1.07
1.72] 2.60
1.35) 0.59

0.99
1.67

0.32
1.56
—0.21) 0.18
—0.46| 0.10
—0.41|—0.74

0.58
1.71
1.09
0.21
0.21

—0.31
0.38
2.15

—0.43
0.42

0.69
—0.87
—1.76

1.23

0.77

0.58
—0.56
—0.14

0.12
—1.03

—0.08
2.54
1.54
0.47

—0.29

132
—2.22
1.10
0.30
0.51

—0.26
—1.67
—0.53
—1.05
SUA!

—0.32

—0.89
—0.87
—0.81

—1.86'—0.89

Oct.

°
—0.75
—0.49
—1.92
1.38
0.03

1.49
1.73
—0.31
0.78
0.67

1209

1.91
—0.78
—0.05
—1.21

1.81
—0.31
1.01
0.56
1.19

217
0.98
—0.90
0.77
—2.53

0.35
0.02
—0.14
—0.44
—0.79

1.28

1.36)

—2.01
—0.58
0.59

=0272

Noy.

Oo
1.58
0.57
0.03

—0.48

—1.11

2.39
0.81
—=5.39
ead
0.77

—1.42
—0.06
1.16
1.55
—2.91

—0.40
—0.19
0.01
Leo
1.78

1.97
0.45
= Ea
—1.74
—0.56

1.27
0.19
—0.85
—0.23
—0.22

1.12
—1.14
0.20
1.22
0.20

—0.95

°
—O29
1.66
0.37
0.69
1.10

1.33
0.94
—=2°.05
0.71
0.69

0.07
—0.87
—0.76
—0.20
—0.04

0.26
—6.92
2.29
—2-55

1.20

0.46
0.32
—1.36
—2.85

0.77

2.54
0.77
—2.42
1.65
0.10

1.07
—3.56
0.97
0.85
—0.66

—0.31

669

Year.

1767 |
1768 |
1769

1770
1771

1772
1773
1774
1775
1776

1782
1783
1784
1785
1786

1804
1805

1806
1807
1808
1809
1810

1813
1814
1815

1787
1788
1798
1799
1800
1801
1802
1803

1811
1812

1816

The numbers without sign must be subtracted; those with the sign — must be added.

105

670

LXXXVIIL.

Denmark. — CopeNHAGEN (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derivea

from Series of Years.

Degrees of Reaumur.

1819
1820
1821

1822
1823
1824
1826
1827

1828
1829
1830
1831
1832

|

|

=
| 1837
|

|

|

|

1838
1839
1840
1841
1842

1845
1844
1845

Means.

Jan.

fe)
2.79
1.99
3.46
\—1.67
0.36

2.56
—2.60
3.65

0.16

-0.07
-1.14
—2.26
-1.60
| 1.52

0.05
2.26
1.87
0.29
0.17

—2.83
— 05) lzf
—0.63
—1.14
—0.26

1.82
0.07
1.24

—1.16

Feb.

3
2.98
1.73
2.30
0.51
0.16

3.82
—0.08
2.36

—2.30

0.43
—3.06
—2.85

0.61

1.73

1.50
1.71
2.16
0.63
0.54

—4.85
—0.38

—0.39
—2.52

1.43)

0.79
—2.48
—1.16

—0.80

March

1.13
2.40
2.39
0.52
0.24

3.64
0.70
0.97

0.59

1.37
=()295,
1.59
—0.16

1.55

—0.45
2.23
1.66
2.71

—1.08

—0.56
—2.06
—0.64
0.97
2.05

—0.33,

50
—4.45

0.55

2.28
—0.04
0.91

2.14

0.58
—1.00
0.69
1.87
1.84

—0.72
0.90
—0.02
0.14
—1.50

—2.63
—2.80
0.35)
0.62
0.61

0.46
0.74
0.54

4.45

May.

o
—0.01
—0.05
1.25
0.25
—0.43

1.59
0.51
0.14
4.30
1.44

1.31
1.84
—0.18
0.31
—0.23

2.32
1.98
—0.92
—( ais
=O)

=0:9%7,
0.49
—2.64
2.21
1.78

—0.96
1.49
—1.01

8.98

June.

Oo
—1.04
0.97
1.69
—1.16
Sid

0.57
0.15
1.22
5.91
1.93

1.34
1.50
—0.86
0.85
1.29

0.72
0.72
1.17
0.24
0.05

—0.70

0.13
—2.17
—1.37
OSL

—0.25
=I 2
0.20

12.45

July.

°
—1.53
1.29
1.58
—0.36
=1:81

0.24
—0.94
—0.61

7.76

0.09

1.36
—0.23
0.30
2.52
—0.94

0.79
3.60
1.03
—0.89
—0.21)

—0.09

0.23
—3.25
—2.56
—0.99.

—0.67
=2.17
0.22

Aug. | Sept.

O° O
—1.38| 0.62
—0.24! 0.69

3.28] 1.46
—0.33/—0.60
—0.86) 0.67

—0.17)—0.64
0.41) 0.47

—0.48| 1.62
6.63

—0.29| 1.48

0.26) 0.41
—1.01| 0.03
—0.81|—0.95

1.55|—0.59
—0.06 |—0.98

—2.27| 0.08
3.26| 0.11
—0.57| 0.09
—1.86|—1.62
0.60/—0.80)

—2.25'—0.44|
—1.24/—0.40
—1.79|—1.95
—0.97 -0.71

2.73| 0.31|

1.03|—0.20}
—1.42)—0.62)
—0.86|—1.26|

——— | —____

13.50) 10.86

Oct.

eC
—2.24
0.87
—0.79
—0.64|
1.62

1.52
1.02
0.09

0.46
—1.43)
0.15
Det
0.60,

0.63
~0.05
-0.85
0.48
—0.06

—1.82)

0.11
—3.77|
—0.38
—0.88)

=1-23|
—()29
—1.04|

7.05

2.63
1.88
1.20

—1.20

0.61
—2.91
1.75
—0.65
—0.47

0.77
0.22
—1.44
—1.34
—0.91

—2.01
—0.19
—0.51
—0.36
1.57

0.86
0.46
1.28

3.12

0.56
1.74
2.18
2.04
2.30

0.50
—3.60
—0.22

1.91

0.58

1.32
0.59
—0.88
0.09
Oem

—0.25
—2.12
—2.65
2.37
2.36

2.99
—1.43
0.59

0.68

The numbers without sign must be subtracted ; those with the sign — must be added.

106

Year.

1817
1818
1819
1820
1821

1822
1823
1824
1826
1827

1828
1829
1830
1831
1832

1833
1834
1835
1836
1837
1838
1839
1540

1841
1842

1843
1844
1845

ileal

i cee mR a a ce i a lk

LXXXIX.

France. — Paris.

671

For Reducing the Monthly and Yearly Means of Single Years to the Means derived

from

Series of Years.

Degrees of Reaumur.

Year.

1806
1807
1808
1809
1810

1811
1812
1813
1814
1815

1816
1817

1818
1819

1820

1824
1825

1826
1827
1828
1829
1830

1831
1832
1833
1834
1835

1836
1837
1838
1839
1840

184]
1842
1843
1844

1821
1822
1823

Jan. | Feb. |March.

°
0.28
|—2.74
=—2.19
0.42
1.16

°
1.38
1.39

—1.42
2.91

Tat

Oo
3.35
0.34
0.42
2.95

—2.90

1.90
—0.82
—0.23
—2.30

2.29

—1.83
—0.32
—1.18
—1.70
—1.98

2.31
1.63
1.33
—3.37
2.39

0.54
2.48
1.94
2.43
—2.02

—1.69
2.22
—0.21
0.95
—0.98

Oeil
—0.20
—0.15

0.16
—1.42

1.02
1.96
eaalterie
0.61
1.23

—2.58
1.52
0.88
0.68
0.06

0.54
2.62
—0.14
—1.00
—0.94

—2.77
—1.63

3.28
—3.16
—3.42

1.73
—4.14
0.80
—0.97
—=2.59

0.56
1.14
0.29
—On72
2.54

0.13; 1.53
—0.36)/—0.59
—1.73| 2.34

4.34/—0.42

1.35] 1.69

1.85
—0.93
—1.82

0.67
—0.14

—1.03
0.97
—5.03
0.73
—0.47

0.55
0.39
—5.21
0.75
1.23

1.62
—3.26
0.26
—0.62
—2.58

0.47/-1.35| 1.94
—2.65| 0.33) 1.30
2.07/—0.39| 1.06
0.83|—1.31| 0.18

1.53| 3.35

==

April. | May.

°

—1.54
—0.63
—2.23
=2°72
—0.42

oO

2.07
1.28
2.55
0.54
—0.62

2.14
0.88
0.48
—1.67
0.18

1.58
—1.92
0.71
1.30
0.36

0.10
—2.02
1.20
1.31
1.20

—1.40
ea
—0.65

0.02
—0.30

—1.95
1.72
0.50

—1.52

—0.22

1.34
1.01
—0.62
—0.54
1.54

—1.48
0.18
0.46
0.32
0.11

0.27
1.14
0.50
—0.08
1.65

—0.20
—1.05
2.54
1.59
—0.55

1.30
0.65
—0.38
—0.70
—0.38

167
eo
—0.23
—0°7 1

0.49

—1.02
—3.34
—2.52
—1.70

2.26

0.42} 2.25
0.26} 0.05
0.50|/—0.31
2.22|—1.35

June. | July. | Aug.

c Oo
0.64|—0.38
1.94) 2.34
2.14) 0.66

—1.08|—0.36

—0.74|—0.70

°

0.77
—0.52
—0.30
—1.38
—0.06

0.44|—0.66
—0.96|—0.46
—1.12|/—1.42
0.46 |—0.91
—0.93/—0.54

0.25
Oni
—1.26
—1.17
—0.89

—1.83
0.61
1.75

—0.85

—1.37

—2.53|—2.37
—1.34/-1.66
1.14|—0.18
0.30| 0.78
—0.35| 0.11

—2.05

3.26
eo
—0.61
—0.05

—=1.39
0.09
—1.23
—0.02
1.24

1.20
0.42
0.46
Oia:
0.70

1.35
—0.09
0.34
0.05
—0.82

1.59
0.85
0.34
—0.10
0.16

2.10
—0.43
—0.74
—1.30
—1.23

—0.12| 0.86] 0.12
0.22} 0.68] 1.87
1.06|—0.24|—1.65
0.70} 1.25) 0.69

0.18} 1.92) 1.42

1.06] 0.56) 0.30
1.14|—0.32] 1.26
—0.68|—0.32|—0.42
1.62|—0.04|—0.86
1.02|—-1.08] 0.98

—1.26|—1.68|—0.50
2.66] 0.52} 3.18
—0.86|—0.48} 0.70
0.54|—1.12|—2.34

——oos

—

5.33] 7.90) 11.59

13.66 | 14.96) 14.82

Sept.

°
0.53
—2.08
—Oan'S
—0.81
1.75

0.95
ea
—1.38
—0.26
Oot

—1.26
0.99
0.05
0.58

—1.19

0.85
0.18
0.00
0.89
1.77

1.11
0.46
0.74

—1.53)

—1.50

—0.35
—0.10
—1.53
1.24
0.36

—1.24
—0.84
—0.12

0.00
—0.64

2.28
—0.12
0.96
0.24

12.52

1.98
—0.12 -1.66

'—0.93 —1.30

—0.14
1.72
—0.58
0.54
0.75

2.70
1.82
i—0.54
2.30
0.40

1.70
1.52
—0.30
—1.01
—0.44

—1.08
—0.77
0.51
—1.64
0.83

2.83
0.06
0.57
0.29
—0.92

—0.10
—0.10
—0.61
—0.05
el O

—0.04

0.04
—0.04
—0.56|
—1.40

0.66
—0.62
0.74
1.10
0.99

0.12} 0.02
—2.28/—1.10

0.12) 0.54
—0.36) 0.26

9.00) 5.41]

Dec.

°

4.00
—1.75
\—1.87;
1.04
1.30

0.72)

Died L

—0.47
2.02
—1.34

0.07
—1.12
—1.23
—0.30
—0.22

3.10
—3.42
1.58
2.74
2.18

1.72
2.58
0.89,

—5.70

—0.82

1.50)
0.53
3.46 |
—0.02
—2.84

0.36)

0.60
-1.48

1.60
-4.76

1.48
0.36
0.60
—3.40

2.92 |

Year.

ba

1806
1807
1808
1809
1510

1811
1812
1813
1814
1815

1816
1817
1818
1819
1820

1821
1822
1823
1824
1825

1826
1827
1828
1829
1830

1831
1832
1833
1854
1835

1836
1837
1838
1839
1840

1841
1842
1843
1844

Means. |;

The numbers witnout sign must be subtracted; those with the sign — must be added.

107

672

Year.

1743
1744
1745
1746
1747

1748
1749
1750
1751
1752

—
at ~

vr Orv Ou
ow

o
On

_
~)
_

1756
1757

1758
1759
1760
1761
1762

1763
1764
1765
1766
1767

1768
1769
1770
1771
1772

1773
1774
1775
| 1776
177

1778
1779
1750

Jan. Feb. | March.

°
—0.15
—0.74
—0.70
—2.19
—2.29

O° oO
0.60) 1.40
—0.91|—2.36
0.15|/—1.64
—0.82|—1.70
—0.47| 2.16

—0.24
2.68
—0.34
1.09
1.71

—2.63
0.11
2.60

—2.29

—0.56

—4.14
sal'sO9
2.88
1.33
0.72

—1.80
0.64
—1.98
3.20

=0:11)' 1-34
—1.14|—2.23
—3.19|—1.24
1.32| 0.38

—2.22|—0.59| 0.00

—1.28
2.86
—1.64
1.78
2.10

0.37| 0.41
2.13| 1.49
—0.69| 0.15
1.90| 2.37
0.09/—1.25

—0.34
0.17
2.30
0.72
1.08

—4.88| 0.79
3.37| 2.52
2.24

—0.22

—3.34

—1.94
1.19
1.45

—0.50
0.11

0.93
0.09
0.92
—l.44
0.21

—0.07)
0.85
el)
—2.33)
0.68

3.38
0.58
1.31
—4.40
—0.23

=0.57
1.62
8.40
1.20
—1.57

1.56
2.18
2.12
1.99
1.14

—1.70|—0.55
2.55| 1.79

—1.26
—0.28

1.54 -0.56) 2.68)

from Series of Years.

Degrees of Reaumur.

XC,
Hotianp. — ZwaNENBURG.
For Reducing the Monthly and Yearly Means of Single Years to the

Means derived.

April.

°
—2.69
—0.80
—0.43
—1.20
=—0.18

=2.12
—0.52
—0.06
—0.60
—0.63

0.01
—1.40
1.72
—L57
1.00

—0.39
0.86
0.77
0.47
2.37

—0.24
0.52
1.62
1.67

—0.63

—0.09

0.99
—1.04
Deo)
—0.50

0.81
1.30
1.04
1.45
—0.56

0.36
1.21
—0.78

May.

°
—0.40
—0.89
—0.04

1.36
—0.52

—0.31
1.11
0.14

—1.21

=1.10

—0.30

0.41
—1.37
—1.53
1-01

1.95
—0.58
=0:22

0.92

0.93

104
1.71
0.27
0.37

—1.36

—0.02
=0.21
—0.15

1,72
el

0.35
0.08
—0.12
—0.85
0.15

0.71

0.61 |/—0.77

1.07 —0.51)

|

June.

o
0.59)
—0.26
—0.69
—0.62
0.92

1.45
—2.30
—0.10
—0.10

0.95

1.19
—0.49
1.89

0.97
—0-11

0.29
0.99
1.31
0.86
0.67

0.28
0.02
1.22
0.35
—0.94

0.54
—0.53
—0.34

0.26

1.19

0.31
0.96
2.19
1.11
—0.19

0.43

July.

Oo
=15
—1.02
—0.92

0.04
—0.65

0.08
—0.10
0.97
—0.78
—0.48

—0.34
—1.33
—0.31
0.80
2.37

=1.41
1.66
—0.15
—0.61
0.30

—0.08
1.43
—0.84
0.20
—0.80

0.65
0.53
0.02
—0.29
0.57

—0.16
1.12
0.78
1.56

—0.07

1.43
0.60

—0.25}

Aug.

oO

0.05
—1.23
—1.20
—1.28
—0.21

0.39
0.23
—0.45
—O-a2
—0.09

—1.00
—0.16
—1.33
—0.50

0.36

@.99
0.71
—0.40
1.16

—1.31

0.22
—0.32
0.85
0.45
0.36

0.33
—0.06
1.20
—1.01

0.36)

1.17
0.51
0.88
0.47
0.88

0.54
1.51

2.04

—0.44

Sept. | Oct.

°
—2.27

0.39
=() 27)
—2.09
—0.49

°
—0.22
—0.71
0.02
—0.65
0.34

—0.03
=i
0.75
lel 9
0.39

0.28
—0.35
=1.25
—0.48

0.07

0.30} 0.59

0.61
—0.08
—0.31

—1.09

—1.12
0.74
—O21

O17
—0.07
1.14
0.67
—0.04

0.28
eo
—1.98

=0:99
—0.74
1.24
0.32
0.71

—0.56
Sele!
—0.05
0.49
0.98

=1.27
0.48
1.59
0.04
0.83

—0.37
—1.71
0.19
0.89
2.68

0.66
—0.30
1.84
—0.01
0.60

1.79
1.23
M25
1.31
0.73

—1.58|}—2.02
1.27; 1.61
1.08 1.03

0.21|
1.05|—1.54

—0.07

Noy.

°
1.83
0.66

—0.50

—2.80
1.62

1.68
—0.45
—1.63
ills spill

0.90

—0.88
0.05
—0.03
—1.13
1.43

0.05

1.08
0.34
—1.37

0.56
—0.45
0.08
0.46
2.15

0.70
0.58
0.06
0.69
2.36

1.51
-1.84
—1.53
0.46
1.97

1.08
0.19

3.46
1.65
—0.31
0.33
1.37

0.67
—0.36
1.22
—2.60
—0.09

1761
1762

1.52
—1.01
—0.82
—0.68
—1.33

1763
1764
1765
1766
1767

0.72
1.43
2.01
1.68
1.16

1768
1769
1770
1771
1772

1.76

1773

1758

1759

1760
|
|
|

The numbers without sign must be subtracted ; those with the sign — must be added.

108

a ee

ea

ee ee

XCs
Hotuanp. — ZwANENBURG (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

673

Year. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec.
° ° ° ° ° ° ° ° ° ° ° °
1781 ||-0.97| 1.18] 1.18} 1.23} 0.37) 2.47] 1.04] 1.56] 0.91) 0.75) 0.36)—0.39
1782 2.88 —1.88/—0.56|/—1.11/—1.09| 0.77} 0.34/—0.54} 0.50/—0.93|—2.43 —0.89
1783 2.39) 2.13/—1.31] 1.24|/—0.05| 0.92] 2.75) 0.93] 0.44] 0.73] 0.48)—2.74
1784 ||—3.26/—3.01|—2.04/—2.16|] 1.23] 0.15|/—0.37/—0.80| 0.94|—2.30] 0.80|—1.60
1785 ||-0.06|—2.34|—3.32|—1.54|—0.96|—0.46|—0.01/—0.59} 1.14) 0.40) 0.41|-1.70
1786 0.35|—0.08/—3.19| 0.44/—0.59| 0.72|/—1.80|—0.75|—1.55|—1.49|—3.59 |—0.23
1787 ||—0.23| 1.24} 1.82/—0.90/—1.11)/—0.11/—0.82|—0.56) .. ee ee oe
1788 2.20|—0.42|—1.15| 0.24] 0.58} 1.05} 0.87|—0.66| 0.30} 0.33)—0.73/—6.23
1789 ||—2.66| 0.98|—3.65|—1.64| 0.56|/—0.65|—0.58/—0.07|—0.40|—1.13/—1.10| 1.84
1790 2.20| 2.51] 1.53|—2.00| 0.89|—0.72|—1.76|—1.25|—1.73|—0.86|—1.71| 0.89
1791 2.74| 1.29] 1.23] 1.34)—1.21/—1.25|/—1.20/—0.14|—0.74|—0.60/—0.79|—0.53
1792 1.06|—0.38} 0.03] 1.70/—1.11|—0.93|—0.07| 0.27|/—1.53|—1.13|—0.14| 1.05
1793 0.52] 1.59] 0.03|—1.40|—1.61|—1.70| 0.67|—0.65|—1.68| 0.98|—0.17) 1.60
1794 ||—0.21]} 2.09] 2.58] 2.59|—0.76|—0.43| 1.52|—0.87|—1.14|—0.54| 0.41/—2.08
1795 ||—4.52|—-1.53/—0.92| 0.85|—1.88|—0.18|—2.29|—0.08| 1.51) 2.39] 0.37| 2.87
1796 4.72| 1.76|—0.99| 1.00/—0.63/—0.50|—0.91| 0.02] 0.64|/—0.80|—0.46|—2.07
1797 0.84) 0.52/—0.18| 0.81} 0.52|/—1.18] 1.38] 0.01/—0.78|—0.60} 0.32} 1.59
1798 1.45| 1.73} 0.31] 1.22] 0.11) 0.77)—0.05) 0.36) 0.19] 0.68)/—0.17|—3.49
1799 = ||—2.11|/—2.00/—1.77|—2.19|—1.68|—1.83 |—1.47|—1.08|—0.72|—0.63| 0.59|—3.54
1800 ||-0.65|—1.76|—1.97| 2.08] 1.85|—2.10|—1.32| 0.04] 0.50) 0.02} 1.12|—0.46
1801 1.97/—0.59| 1.61] 0.26] 0.68|/—1.43|—0.76| 0.32] 0.45} 1.16) 0.53} 0.47
1802 ||-0.75| 0.24) 0.56] 0.55|—1.10|—0.28|—1.69| 1.08] 0.03] 1.15] 0.54] 1.19
1803 ||—3.04/—2.29| 0.00} 2.06/—1.55|/—0.92| 1.43] 0.75|/—-1.11| 0.06} 0.29} 0.43
1804 3.30] 0.13|—0.92/—0.84| 1.35] 0.26] 0.03/—0.20| 1.57) 0.62|—1.79|—2.84
1805 ||—1.22|—0.36|—0.07|—0.56|—2.16/—1.97/—1.18| 0.05] 1.47|—2.00|—1.69| 0.94
1806 3.14] 1.58] 0.25/-1.95| 1.79|—0.52} 0.13) 0.67) 1.41] 0.23} 2.52) 4.12
1807 2.36| 1.74|/—1.32|—0.37| 1.09|—0.17| 1.64] 2.53/—-1.40]} 1.63/—0.15} 0.84
1808 1.19| 0.07|—1.71|—2.02] 2.07|—0.46] 2.62] 1.64| 0.24/—1.35|—0.05|—1.50
1809 ee ee - - |—2.53| 1.30/—1.03/—0.47| 0.09|—0.27|—1.32/—0.99| 0.68
1810 ||—1.94|—1.39|—0.36|—0.41|—1.76|—0.96| 0.05|—0.07) 0.99|/—0.63|—0.03| 1.06
1811 ||—2.75| 0.55) 1.41] 1.16) 2.75] 1.53} 0.47)—0.30/—0.49] 2.40] 1.80) 1.05
1812 0.81} 1.20|/—1.21|—2.48| 0.16|—0.68/—1.28|—0.56/—0.62| 0.46/—2.11|—4.00
1813 ||—0.84) 1.53] 0.16] 0.04) 0.85|/—0.32|—0.12|—0.91|—0.75|—1.32|—0.76|—1.31
1814 ||—3.33/—4.20|—2.89| 1.27/—2.01/—1.86| 0.44|—0.66|—0.72|—1.44|—0.17| 0.17
| 1815 ||-2.69) 0.96} 2.23) 0.59] 0.59|—0.08|—1.63|—0.77|—0.54| 0.07|/—0.97|—1.90
1816 0.52|—1.64|—0.78 |—0.28 |—1.48|—2.28|—1.31|—1.85|—1.14/—0.12|—2.06|—0.45
1817 2.36| 2.31) 0.19|—2.12/—1.38| 0.84/—0.83/—1.30| 0.69|/—3.16| 1.83/—0.67
1818 | 1.96|—0.40| 0.40|—0.21/—0.56) 1.69} 0.99|—0.64|/—0.36|/—0.34) 0.74/—-1.22

The numbers without sign must be subtracted; those with the sign — must be added.

F 109

674

XC.

Ho.ianp. — ZwANENBURG (continued).

For Reducing the Monthly and Yearly Means of Single Years to the Means derived

from Series of Years.

Degrees of Reanmur.

Year. Jan. | Feb.

ae

Means.

XCI.

March.} April. | May. | June. | July. | Aug.

Oo Oo ° ° oO
1819 1.47} 1.04} 0.68} 0.84) 0.91
1820 ||—2.89|—1.49/-1.21] 0.72) 0.12)—1.71|—1.06|—0.11|—0.93|—0.81
1821 ||-0.67|—1.32/—0.16| 1.66)/—1.24|-1.91|—1.81|—0.14| 0.72] 0.20
1822 2.64| 1.93] 2.26) 0.40) 1.53) 1.65
1823 ||-6.29/-0.94) 0.11/-1.19| 0.44/—1.88|—0.89| 0.12|—0.37|—0.66

1824 2.30} 0.20|/—0.22|—0.78|—0.47|—0.40/—0.19} 0.00) 1.03
1825 2.63} 0.60/—1.42|} 0.43] 0.12} 0.00|—0.04|—0.36] 1.20| 1.04
1826 ||-2.57| 0.97| 0.87] 0.17|—0.59| 1.52
1827 ||—0.65|—3.83] 0.58} 0.93) 0.40/-0.24| 0.14/—0.55
1828 0.75|—0.75| 1.05) 0.43} 0.49) 0.70

1829 ||-3.35|—2.47|—1.43|—0.45] 0.10|/—0.37|—0.42|—1.35
1830 ||—2.70|—4.01| 0.50) 0.75) 0.13/—1.45
1831 ||-1.07| 0.04} 1.24] 1.61/—0.10/—0.09
1832 ||—0.77|-1.34|—0.43| 0.55|—1.49|—0.07|—1.74/—0.12|—0.64| 0.48
1833 ||—2.12) 1.33/—-1.62|—0.68) 2.22

1834 4.21} 0.40} 1.15|/—0.87) 1.31
1835 1.21] 1.81} 0.47|—0.76|—1.09| 0.92} 0.47] 0.07

rr | | mm | a |

0.99) 3.14] 3.86] 6.80] 10.12] 12.45] 13.97| 14.13] 12.30] 8.61

oO fe) ° ° c
0.50} 0.56} 1.12} 0.55|—0.79

0.24|—0.19|—0.88} 0.74

2.12] 2.01 1.95

0.79 |—0.64| 0.43

0.59 |—1.17
0.90) 0.66

—1.45| 0.34
—0.14| 3.16

0.92|—0.48 |—2.08|—0.99} 0.11

0.87} 1.80} 1.00} 0.86] 0.68
—0.22|—0.77

Encianp. — Lonpon.

Degrees of Reaumur.

0.36) 1.52] 2.59

Nov. | Dec.

Oo Oo
—1.18/—2.18
—1.84/—1.59

1.72| 2.08

1.99|—2.95

0.90| 1.65

1.03) 1.70
0.16) 1.99
—0.91) 2.79
—0.18) 1.96

—1.61|—5.77
1.00|—1.80
0.66) 1.72

—1.37| 0.72

0.44| 3.07

—0.31| 1.42
—1.44|—0.44

4.84] 2.16

0.50|—1.00} 1.10/—

—1.05|—1.74/—1.94/—
—2.04/—1.70} 1.14
—0.08} 1.26/—0.35/—

1804 3.39|—0.73} 0.00/—0.95
1805 ||—0.52| 0.04
1806 2.27) 1.27|—0.23|—1.21
1807 0.64) 0.54/—1.80)/—0.14
1808 0.64 —1.01)—1.80/—1.43

1809 ||-0.11) 2.36) 0.65|—2.05

2.72| 1.23| 1.64|-0.99|-0.43
—2.08|—1.26|—0.23|-0.46

—1.44/—1.51|—0.45|/—0.70
—0.28|—0.12} 1.41} 0.44

0.34|—0.20|—1.38

1.83|-0.38|—1.35|-0.61
—1.98|—0.04| 0.11] 1.76] 1.61
—1.00|—1.28/-0.51| 1.23/—-1.45
-1.56| 0.62|—0.82|-0.97|-1:34

1.31/-0.10| 0.88|-0.11] 0.09

1.26

1.39
0.66
0.10

—1.34/—0.79|—1.40|/—1.19|—1.02
—1.37| 0.66] 1.23] 0.42!—0.86
—0.09/—0.48} 0.76) 0.88} 0.33

0.11|/-0.04) 1.14/—1.50|—0.66|—2.20} 1.74] 0.49] 0.23
-92|-1.03|} 0.51) 0.88/—1.12

—0.89) 0.97) 0.41|/—-1.77|—0.40

1.80} 1.07)/—0.57/—0.20} 1.16] 0.66
—1.49/—0.89| 0.60} 1.15|/—1.06
1.00} 0.64)—0.06| 0.38] 0.16) 0.54
1.05|/—0.34| 1.07} 1.36/-1.61| 1.44
1.99} 0.02} 1.87] 0.82|—0.55|—1.76
1.23/—0.38|—0.75|—1.09 |—0.24/—0.08

0.36|—1.10
—0.88| 2.46
—0.97|—3.76
—0.44] 0:93
—1.24|/—2.39

0.13}—2.79
—0.15|—0.24
—1.08|—1.37
—0.89|—0.56
—0.31} 0.98

0.68|—1.52
—1.17| 0.08
2.11] 3.64
—1.60|—1.19
0.58|—1.32

—1.33| 0.72

’ The numbers without sign must be subtracted; those with the sign — must be added

110

a

XCI.

Eneianp. — Lonpon (continued).

675

For Reducing the Monthly and Yearly Means of Single Years to the Means derived

Year.

1810
| 1811
1812
1813
1814

1815
1816
1817
1818
1819

1820
1821
1822
1823
| 1824

1825
1826
1827
1828
1829

1830
1831
1832
1833
1834

1835
1836
1837
1838
1839

1840
1841
1842

Means

Jan.

°
—0.47
-1.09
0.42
-0.51
—3.80

—1.49
0.64

Feb.

°
0.01
0.85
1.43
1.34

—2.21

1.34
—0.70

from Series of Years.

Degrees of Reaumur.

March.) April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov.

° oO

Dec.

O° ° o ° oO ° ° Oo
0.38] 0.12|—1.44| 0.20|—0.44/—0.16] 1.32) 0.95] 0.32/—0.03

1.54] 1.64] 2.03} 0.51] 0.36/—0.51| 0.83] 2.50
—0.68|—1.56|—0.19|—1.09 |—1.24/—1.89/—0.64|—1.10|—0.75
0.87/—0.81} 0.12|—0.96|—0.97|—1.00|—0.99|—1.05|—0.84
—2.55| 1.06/—1.66/—2.03|—0.04|—0.91|—0.72|—1.10|—0.75

1.84} 2.05
1.67|—1.32
2.29| 0.85

—1.44/—0.66
1.04|—0.97
2.16] 2.19

—1.40} 0.19
0.78} 2.41

1.31|-0.21
—1.49| 1.61
—0.96|—3.19
1.73] 0.54
—1.76|—0.24

—2.31|—2.17
—0.73| 1.01
0.13|/—0.86
—0.64]) 1.45
3.73] 0.48

0.82} 0.81

1.94} 0.44] 1.19
—0.64|—0.50|/—0.99
0.25|—0.63|—1.75
0.03] 0.04)—0.06
1.36} 1.37) 0.88

0.25) 1.68)—0.01

0.24|—0.53|—0.07} 2.48] 0.55|—1.42
—1.27|—2.35|—1.18| 0.96} 0.28|—1.24
0.77|—1.46|—2.60|—0.81|—1.76| 2.14

2.24
—0.69

—0.74

2.40] 1.98] 2.30
0.36| 1.58] 0.70

—0.71|—1.18|—0.99

2.06] 3.20
3.08 |—0.75

—0.96|—0.22

0.87| 2.08|—1.26|—1.80

2.78| 0.48] 1.45
0.16|—0.10} 2.16
—0.73|—0.94|—1.48

—1.17

0.74

1.28} 0.08
1.46} 1.16
0.39|—0.08

0.80
0.73
—2.93
0.73

1.27
—0.38
—1.02

os

2.38

(0:99
0.74
=2.57
0.14

—0.50
—1.41
0.81

3.81

1.00) 0.28) 0.70
—1.08/—0.85| 0.50

1.98} 1.15|/—1.39
1.16} 1.21/—0.21
—0.42| 0.35|—0.70
—1.68|—0.10} 2.72
1.16|—0.48} 1.59

—0.22| 0.30/—0.12
0.94/—1.12|—1.28
—2.22|—2.79|—2.01
0.18/—1.50|—0.88
—1.08|—2.48|—1.24

—1.97|—0.01| 0.14
2.58) 0.61] 2.08
1.47|—0.43} 0.59

1.57
0.33
—1.40

—0.03
1-97,
—0.40
0.88
0.35

—1.09
0.55
0.57
0.66
1.20

0.71
0.48
0.04
0.02
0.66

1.02
2.17
2.84

=1.55
0.36
0.14

0.47} 1.28
0.29|—0.24
0.78] 0.39

0.00|—0.29} 0.48

0.32
1.04
—0.56
—0.03

2.32
2.36
0.54
1.38

1.29 —0.16

0.90
=1.01
0.90

—0.83
—0.48
—0.70
—0.08
—0.74

0.59
2.32
—1.14
0.55
1.08

1.47| 0.38
1.69} 1.67
0.74|—0.73
0.36 |—0.62
—0.48 |—1.22

0.65 |—1.09
1.49) 1.29
—0.20) 0.18
—0.13)—1.31
1.29} 0.76

1.63
0.30
0.21
0.52

—1.41

—1.37
—0.04
—0.06
—1.41

0.70

0.52/—0.84| 0.59
1.28/—1.11} 1.19
0.84/—0.28| 1.99
—0.16| 0.65} 2.37
—1.16)—1.60|—3.14

0.32} 0.63|—2.12
2.39|—0.08] 1.21
0.52) 0.47) 1.08
0.24] 0.16) 2.21
0.10) 0.45) 0.35

0.87} 1.09) 0.21

0.18|—1.11
0.05|—0.16
—0.31|—0.42
—0.35|—0.73

—0.77| 0.73
—1.02|—0.02
0.18} 2.11

—1.50
—0.75
—0.92
—1.06

—1.10
0.16
0.19

—0.90
—1.14
0.21
0.10
—0.52

—1.32
—0.01
—1.70

0.05|—1.76
—0.55| 0.28
—0.57| 1.17
—0.68|—0.03
0.67|—0.21

0.60|—2.41
0.40| 1.06
0.36] 2.50

ee eee

12.06

8.88] 5.51) 3.81

The numbers without sign must be subtracted ; those with the sign — must be added.

111

‘Year.

1811
1812
1813
1814

1815
1816
1817
1818
1819

1820
1821
1822
1823
1824

1825
1826
1827
1828
1829

1830
1831
1832
1833
1834

1835
1836
1837
1838
1839

1840
1841
1842

Means.

Er a nena NERESNONEESESooeeeeemmeeeooeT

676

Year. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec.
° ° ° ° ° ° ° ° ° ° ° °
1814 ||—4.71|—1.63|-1.73) 0.56|—2.46|—2.36|—0.60/—1.12|—0.34|—1.16/—1.61|—1.46|| 1814
1815 ||—1.69| 1.13} 0.16|—0.03) 0.95) 0.24/—0.12] 0.23) 0.27] 0.74|/-1.68|/—2.47|| 1815
1816 ||—0.24/—1.60|—1.49|—1.58/—0.74|—0.60/—0.96|—0.53|—0.99 |—0.24|—1.12|/—1.84|| 1816
1817 1.60) 1.29/—0.44] 0.33/—1.12} 0.80/—0.43|—1.11] 0.18|—2.22) 1.78)—1.38]| 1817
1818 0.51/—1.03|—1.41|—1.59| 1.03] 1.43) 0.85|/—0.22/—0.15] 2.34] 2.54] 0.25] 1818
1819 0.85|—0.88| 0.67/—0.20/—0.36|—0.85| 0.07) 2.00} 0.30|—0.32|—2.35|/—2.60|| 1819
1820 ||—2.43] 0.95] 0.33] 1.10} 0.20/—0.12| 0.39/—0.26|—0.36/—1.20} 0.15] 0.36]} 1820
1821 0.55| 0.97} 0.26) 1.12|/—-1.09|—0.45|—0.01| 0.84] 1.44] 0.83] 0.38) 0.73)| 1821
1822 1.85} 1.28] 1.08] 0.79} 0.97] 2.04} 0.50) 0.26/—0.81] 0.48] 1.38/—0.61|| 1822
1823 ||—0.91)—1.69|—0.16/—0.60| 0.63/—1.01/—0.92|—0.85|—0.15|~0.56| 2.02/—0.04|| 1823
1824 2.64) 1.29)-0.56; 0.39} 0.18; 0.26] 0.43} 0.03) 0.24/—2.16/—0.16) 0.35|| 1824
1825 1.94] 0.84) 0.45] 0.82/-0.09| 0.31] 1.59} 1.53] 1.85] 1.79/—0.32] 0.80|} 1825
1827 0.68|—0.77| 0.02) 0.73) 0.51} 0.38] 0.16] 0.37] 1.48] 2.48/—0.99| 2.23]| 1827
1828 2.50} 1.44] 1.63) 0.69) 1.20} 1.23) 0.93] 1.03] 1.23} 1.10) 2.05) 2.73]| 1828
1829 ||—0.38) 0.96) 0.42|—0.48| 0.87] 1.00)/—0.12)/—0.44|—1.02 Cea 0.02|| 1829
1830 0.40/—0.22|} 2.07} 0.87) 0.60|—0.63} 0.50/—1.13} 0.11] 1.33] 0.92/—0.89|| 1830
1832 1.91} 1.27} 0.92} 1.22'-0.19| 0.50} 0.24) 0.93} 1.35) 1.53)—0.56| 0.40)| 1832
1833 ||/—1.40| 0.51/-0.41| 0.32] 2.79} 0.59) 0.67/—0.98/—0.24) 0.53] 0.12] 0.57|| 1833
1834 2.23} 0.97} 1.05} 0.51) 1.01] 0.53) 0.93) 0.34] 0.28] 0.49} 0.14] 0.57|| 1834
1835 ||-0.27| 0.72|—0.08| 0.23)—0.58| 0.20|/—0.17/ 1.09|—0.10)—1.10|—0.31/—0.34}} 1835
1836 0.59|—0.67/-—0.70|—0.81| 0.10|/—0.54/—1.16/—1.09|—1.67|/—0.86|—0.94/—0.05|| 1836
1837 ||—0.07| 0.20|/—2.26|—2.35|/—1.70|—0.05| 0.52/—-1.13|—1.32] 0.23|/-1.18| 1.74|} 1837
1838 ||—2.58|—4.61/—0.83 }—1.44|/—1.75|—1.03/—0.04/—0.24|—0.53/—0.55| 2.73) 0.48]| 1838
1839 |/—0.90|—0.79 |—1.56/—1.24|—1.18 |—0.45|—0.34|—0.79 |—0.64|—0.17| 0.11|—0.35|| 1839
1840 0.65|—0.26|—0.07| 1.00|—0.72|—0.40/—1.30| 0.21|—1.29|—0.63|—0.17|—0.58|| 1840
1841 ||—2.19/—0.09| 2.25|/—0.28) 0.51|—1.07|—0.83|—0.20| 0.51/—1.52/—1.94|—0.49/|/ 1841
| 1842 |/—1.17| 0.49} 0.35|—0.07| 0.48} 0.02/—0.83| 1.24] 0.32/—1.52|—0.81| 1.81]; 1842
Means. 1.77| 2.74| 3.87] 5.71] 8.13] 10.58] 11.76] 11.28} 9.52] 6.72] 4.35] 2.96|} Means.
XCIIL Fintanp. — Tornea.
1801 4.6 mye . she ° ame <0 ° ae - - |—0.01/—1.67|| 1801
1802 }|—0.57|/—0.17|—0.15| 0.10|—2.88|—0.66|—2.03|—1.60|—1.60} 1.30)—2.10)/—4.06|| 1802
1803 |/—3.50/—0.90|—0.13] 1.57) 1-69|—0.44|—0.58| 0.93|—0.90| 1.18] 0.71|—3.67/|| 1803
1804 ||—2.50)—4.82/—2.34| 1.99) 1.50|—0.97| 0.78|—0.70|—0.21| 1.19] 1.46\—4.01 1804
1805 3.36|—2.94/—1.15|—0.79|—1.56/-—2.90|—1.03| 0.62'—1.34|/—4.62|/—2.83/—2.98 || 1805
1806 2.91} 1.91|—0.03| 2.02} 1.00)—1.18/—1.90} 2.00} 1.20! 0.13/—0.97| 0.74|} 1806
1807 |\—3.40| 1.94|—1.25|—2.57/—1.93|—0.61| 0.34] 0.89|—1.41|—2.30|—0.20|)—0.92)| 1807
1808 1.80|—1.50}. 0.19/—2.31] 1.14] 2.65} 0.58/—0.11/—0.51] 3.53] 2.24|—3.74|| 1808
1809 ||—7.19|—3.99|—2.74|—3.78|—1.91|} 0.62/—0.50| 1.16|—0.34|—0.25|—1.67| 8.07)| 1809
1810 ||—2.18|—2.36|—2.41|—2.45/—6.45|—0.68|—2.13|—0.68|—1.34|—1.23/—4.13|/—2.20|; 1810
1811 2.98|—2.74| 3.64|—2.04/—0.69| 0.42/—0.91|—2.66|—1.05|—1.90|—0.10 —2.06|| 1811
1812 1.18) 1.85'—3.37|—1.39| 0.55)/—2.94/—2.53 |—1.20|—2.85|—0.78|—4.18/—1.15|/ 1812
—1.58 1.87 —2.89| 3.65/—1.43

XCII.

Scotntanp. — Kinrauns CastLe.
For Reducing the Monthly and Yearly Means of Single Years to the Means derived

from Series of Years.

Degrees of Reaumur.

The numbers without sign must be subtracted; those with the sign — must be added.

112

a eet a a

XClll,

FIntanp. — Tornea (continued).
For Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

677

1814
1815
1816
1317
1318

1819
1820
1821
1822
1823

1824
1825
1826
1827
1828

1829
1830
1831

1832 |

Jan.

Means.||19.55 —10.76

March.

April. | May.

° oO ° oO o

—7.01| 2.71/—1.85| 0.92)—0.59
1.22} 3:16) 0.66) 5.27) 3.22
2.27| —8.23|/—4.25| 0.50/—-3.05
3.04) —2.13|—2.78| 0.19) 2.42
3.46) —3.34|/-1.07|—2.61|—3.48

4.47) —0.15|—0.50|—2.07| 0.23
—5.74| —0.22|/—0.63|—1.32|—0.73
—2.18| 1.12) 0.50} 0.83] 1.24

0.13} 6.44) 5.68) 4.22) 1.67
—4.01} —1.08) 4.15} 0.66| 0.87

0.71) 4.20} 1.75|—0.22|—0.40
3.99} 1.42] 1.83] 1.78|—0.29
1.99| 4.70) 4.99} 0.50) 2.65
0.03} 0.00} 0.59|—2.13) 2.39
—0.50| —0.84|—1.77|—0.66| 2.84
1.26) —4.27|—2.69|—2.53| 1.26
0.99; 0.80) 2.08|—0.54|/—1.10
—3.98| —0.07|—2.31| 2-01] 0.98
5.26] 8.25] 3.64) 2.92) 0.10
—7.19|—1.62| 4.01

July.

°

4.65
4.70
0.18
0.65
2.98

2.90
0.13|-—0.17| 0.18|—2.17
—2.44/-—1.32)—0.58] 3.58
—0.89
—0.09|—0.73|—0.86| 2.06

Aug.

Sept. | Oct.

° ° ce
4.46| 2.60} 0.44
5.03} 4.02] 3.38

—0.41

1.97| 0.16

—1.34|—0.36|—1.14
—2.55| 0.09) 1.08

2.22

1.04|—4.58

1.75|—0.14| 0.47

Nov. Dec.

° °

—0.15) —4.50|| 1814
4.30] 4.82]| 1815
1.17} 2.29)| 1816

—0.07| —2.85|| 1817
2.89] 5.83|| 1818

—3.62| —2.15|| 1819
—1.94| —2.67|| 1820
—1.52! —4.13]| 1821
—2.05| 4.46|| 1822
—1.38] 1.26]| 1823

Year.

0.29|—0.89|—0.73| 1.25|—2.18|-1.01} -0.96|| 1824
—0.43|-1.53|-0.17| 6.34] 2.14) 2.35] 3.20]/ 1825
1.56) 2.28] 1.70|-0.70] 2.67| 3.23] 3.74/| 1826
1.79|—2.00|—1.64] 1.21|-1.53|—-0.56| 5.68|| 1827
0.18|—1.73|—0.73|—2.86| 1.18} 0.50] 1.69|| 1828 |
—0.31] 0.30|-1.82| 0.38|—1.78|-0.53| 2.86] 1829
—0.66|—0.89|-1.73|—0.88|—0.03| 3.44) —1.22|/ 1830
1.98] 0.81] 0.79|-0.54| 0.01] 2.99} 1.69) 1831
0.51|—1.11|—1.22|-3.67| 2.86] ..|] ~~ |} 1832
10.59 13.05] 10.81] 6.22 0.26 |—6.27 -10.32 Means.

XCIV. Norrn America. — Aupany, N. Y.

Degrees of Reaumur.

1826

1.02

1827
1828
1829
1830

1831
1832
1833
1834
1835

1836
1837
1838
1839
1840

1841
1842
1843
1844

| Means

F

1.92) 2.44
—2.91
2.80
—0.21
0.28

1.07
4.52
—2.27
—0.11

-1.30
0.18
2.34

-1.18

—1.06)

—1.03
—0.87
—1.34

3.73
—1.50

—0.35
—3.40

3.34
—0.25
—3.32

-3.89
—0.72
=01
1.62
3.14

1.95
2.03
2.65
—3.74

eee

—3.58

—0.72

3.15
—3.06
—0.15

eee

—3.08

1.65
1.15
2.10
—0.87
1.41

2.77
0.16
=115
0.67
—0.98

—3.48
—1.94
0.97
0.14
0.60

—1.19
2.06
—4.26
0.27

1.28

3.23
—0.02
0.76
2.09
—0.21

1.62
—0.88
0.12
3.64

1.89
—1.29
1.75
0.68
—1.59

1.07
—1.35
1.55
—0 05
—0.57

—2.27
—2.02
—3.07
0.79
1.32

—0.95
—1.23
—1.26
—0.79

0.96

—2.58
0.62
—0.62
2.97

7.04] 12.33

—1.13
—1.96
—0.62

0.47

0.72
0.55
—0.41
—1.54
0.81

1.07
0.05
2.66
0.03
—0.92

2.11
0.19
—2.35
—1.12
—0.34

0.32
—0.34
—1.06

1.59
—0.43

—1.30
0.07
1.78

aailenio

—0.14

0.20
—0.95
0.31
0.15
0.94

0.

0.28
—0.55
—0.60

17.80

1.90
—0.95
—0.64
—0:29

16.02

1.09
0.08
1.33
—0.42
0.27

1.01
—0.31
ets)
—0.03
—0.90

1.57]
0.43
0.35
-1.93
0.19

1.46
1.14
—0.31
0.92
1.42

1.00
0.53
—0.55
0.27
—2.14

1.52
0.67
—0.55
—1.31
1.45

—2.39
—0.98
0.27
—0.14
0.81

1.23
0.13
0.64
—0.19

—0.39
—0.60
0.36
0.41
—0.91

—3.06
—0.89
—0.68
0.99
0.28

0.88|—1.72
—1.09/—0.12
0.85|—1.24
0.72) 0.02

16.86

13.06; 7.64

0.81
—1.72
0.76
0.50
3.83

0.35
0.77
3.17
3-63
4.71

0.63/—4.94
1.15] 0.76
—0.61) 0.18
—0.36|}—1.13
0.31/—3.06

—0.62|—0.92
0.33|—0.49
—1.47|—2.11
—0.94|—0.19
0.28|—1.26

-0.49| 0.86
—1.00|/-1.69!
~1.11| 0.93)
-0.20|} 0.47

2.70|—1 65

The numbers without sign must be subtracted; those with the sign — must be added.

113

678

For Reducing the Monthly and Yearly Means of Single Years to the Means denved
from Series of Years.

Year.

Ti87
1788
1789
1790
1791

1792
1793
1794
1795
1796

1797
1798
i939
1800
1801

1802
1803
1804
1805
1806

1807
1808
1809
1510
1811

1812
1813
1814
1815
1816

1817
1818
1819
1820
1821

1822
1823
1824
1825
1826

1827
1528

Means. |

Jan.

|—0.89

Feb. | March.

° O°
—1.37| 0.24
—2.15|—0.32
—2.81|—0.65
—1.04/—1.32
—1.48} 0.90

1.79
1.42
1.91
0.54
0.37

—0.37
0.70
—0.25
—0.50
0.12

0.55
0.54
0.31
—0.31
1.51

2.24

0.08
0.24
0.46

—0.16
2.15
0.08
1.02
1.60

0.76
0.67
—0.48
1.92
—1.83

—1.30
1.55
—1.36
—0.68
1.69

—1.13
1.41
las
0.95
0.14

—2.68
—2.55
—0.51

0.28
—2.14

SG
—0.34
0.80
=—1.98
0.07

—1.43

0.14
—2.30
—0.22
—0.80

—3.48
—3.56
4.9]
1.00
1.50

—0.50
—1.99
0.47
1.27
1.11

1.64
=0:99
—0.11

2.16

0.10

0.64
1.10

0.52
4.05

XCV.

Nortu America. — Satem, Mass.

Degrees of Reaumur.

April. | May.

° °
—0.24/—0.61
—0.47|—0.28
—0.47/-1.94
—1.47/—0.50

0.64} 1.50

1.61
2.55
1.16
0.39
—0.11

0.87
1.51
1.19
0.21
1.17

—0.26
0.76
0.51
1.92
0.21

-1.25
1.44
0.63

—0.12
1.69

0.31
0.38
—0.98
1.45
—2.28

—1.34
—0.81
1.55
0.91
—0.44

—0.31
0.37
0.31
0.70

—0.01

—0.80
—0.74
—0.24
0.84
0.65

—1.05
0.08
1.08

—1.47

—0.44

—3.22
—1.46

0.76
—].49
—1.36

—0.73
—2.31
—1.06
—0.07
Oso"

—0.44
—0.42
—0.23
—0.23
—0.37

—0.87
0.20
0.62
1.49

—1.05

1.77
—1.19
—0.84

0.69

2.95

1.56
—0.97

6.36

-0.03
—0.68

11.05

June.

°
—0.84
—1.39

0.61
—0.50
1.16

—0.84
2.07
0.11
0.12
0.40

0.41
0.60
0.58
1.22
0.08

0.13
0.53
0.20
0.11
—0.19

—0.62
0.04
—0.42
0.04
0.43

—2.04
—0.95
—1.58
—0.16
—2.36

—1.65
1.17
1.53
0.51
0.36

0.09
—0.42
—0.59

1.74

0.04

—0.60
1.06

15.61)

July. | Aug,

Oo
—0.28
(Oo?
0.05
—1.50
0.16

Oo
—1.53

0.14
—0.31
—0.75
—0.08

—0.64
0.59
0.52

-0.31
0.39

—0.28
0.75
0.58
1.85
0.80

—0.45
2.29
0.99
0.11
0.49

1.40
0.46
0.45
1.15
0.35

0.13
—0.08
—0.25

1.40
IN

0.88
1.09
—0.44
0.82
—0.77

0.05
—0.15
—1.90
—0.93

0.16

0.00
—0.86
—0.76
—0.39

0.14

—2.13
—1.17
—0.30

1.12
—2.49

—1.64

0.44
—0.94
=1.82
rot

—0.52
0.85
0.64
1.95

—1.08

—0.76
—0.01
0.59
0.26
0.83

0.44) 0.06
—0.19} 0.35
—0.14/—1.08

2.36 |—0.12

1.56/—0.13

—0.35/—0.82
0.36]; 0.96

17.97) 17.17

Oct.

°
—1.00
—1.00
—2.56
—0.56
—2.23

0.77
—0.09
—1.26

1.24
—0.55

—0.83
0.81
—0.16

0.43
0.96

1.87
0.96
—1.05

—0.82|

—0.04

0.22
—0.72
3.00
—0.12
1.74

—0.30
—0.62
—0.07)
—0.69
0.17

—0.70
0.61
0.64

—0.17

—0.05

0.75
O25
0.21
0.70
0.23

1.13
—0.19

8.56)

Nov. | Dec.

° Oo
0.58} 0.07
2.03|—1.60
0.47) 1.18

—0.97|—2.82

—0.42| 0.07

0.92)}-1.15
0.07|—0.10
—0.16} 4.35
0.36} 1.51
—1.26|/—3.02

—1.72|—2.52
—1.57|—3.03
—0.53/—0.53
—0.93} 1.63

0.17} 0.30

1.23] 1.19
—0.71| 1.99
0.16|—1.76
0.13] 3.24
0.15|—0.06

—0.65| 2.45
0.69} 0.72
—2.19| 2.04
—0.24|—0.34
0.67|—0.34

—0.90
0.83
0.39
1.07
1.79

—0.73
—0.70
1s
—0.45

0.31

0.78
1.92
1.26
—0.98
0.42

0.68
—1.94
—0.43
—2.49
—1.31

0.12
0.52
1.43
0.62
0.55

0.96
-1.72
-0.61
—0.14

0.19

0.01
2.04

—2.74
1.17

3.53|—0.63

The numbers without sign must be subtracted ; those with the sign — must be added.

114

Year. |

XCVI. 679
IcELAND. — REIKIAVIK.

For Reducing the Monthly and Yearly Means of Single Years to the Means derived
from Series of Years.

Degrees of Reaumur.

Year. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov.

° ° fo) ° ° fo) ° ° ° ° ° o

1823 1.80)—0.56] 0.40) 2.09/-0.60; 0.06] 2.44) 1.76} 0.84/-1.50} 0.18|—0.86]| 1823
1824 ||/—0.32| 0.61/—0.05| 2.16} 2.95] 4.63) 3.12] 1.53|—0.73|—2.37/—3.64 1824
825 ||—1.07|—0.40| 3.04] 0.98] 0.50) 0.33] 1.70} 0.66] 2.34} 1.68/—0.81)/—0.92|| 1825

1826 ||—0.19| 2.84} 2.15|—0.79] 1.58/—1.10|—0.75/—0.18} 1.24] 1.12] 0.36) 1.17]| 1826
1827 ||—0.72| 1.93|—-3.80/—0.86| 0.67} 0.86] 0.14| 1.73] 0.64] 2.29) 2.26) 0.88)| 1827
1828 1.98] 2.48] 1.54] 1.29 0.53] 3.15] 3.98] 3.07| 3.26] 0.94) 2.77|| 1828
1829 1.02/—0.09| 0.20) 0.56] 0.79] 0.26] 1.21) 2.21/—0.20/—-1.16) 0.03) 1.86/| 1829
1830 1.89|—0.58|—1.22|—0.72| 2.44) 0.52/—0.80| 0.68} 0.85} 2.09)—0.35 —2.60|} 1830

1831 0.28/—0.95) 2.58) 1.39)/—1.76| 1.44'—-1.89
1832 0.71|—0.48|—1.77|} 0.17|—2.20|—1.87|—2.80

—1.85|—0.37| 0.95/—0.76| 1.45|| 1831
—2.94|—2.59|—0.42) 1.22|—0.29

1832
1833 1.41}—0.13] 1.93/—0.21/—0.57|—0.40|—1.96|—2.14|—1.22|—0.79| 0.31|—1-64|| 1833
1834 |/-0.43] 0.10} 0.73] 0.14|—1.35/—1.99|—1.81|—2.41|—1.44/—1.13| 0.22] 2.76]| 1834
1835 ||—4.08|—1.92|—1.55|—1.32|—2.35|-1.97|—1.62|—0.38|—0.64|—2.41| 1.58) 1.30|) 1835

1836 ||—1.86|—3.24|—2.00|—3.01 |-0.37|—0.94|—0.59|—2.68 |—1.80|—1.67|-1.52|-1.95|| 1836
1837 |/-0.42] 0.43/-2.23/—1.91/-2.07/-0.82| 0.40] ©. | +. | ++] ++] ++] 1887
Means. |/—-1.00/—1.60/—1.07 1.84| 5.54| 8.67| 10.78] 9.27] 6.42] 2.19|—0.60|—1.15|| Means.

XCVII. GREENLAND. — GODTHAAB.

Degrees of Reaumur. |

—2.52) 1.51) 2.19

es e. ee «. oe ee ee oe ee 1796
1797 0.91|—2.08|—0.73|—1.96| 1.14] 0.27! 1.40} 1.31] 0.77) 1.02] 2.22) 0.87)| 1797
1798 ||—1.30] 0.53) 3.98] 0.08] 0.37|—0.39| 0.39] 0.07|—0.37|—0.67| 0.83|—0.08)|| 1798
1799 ||-0.40| 3.08|—1.87| 0.47| 0.37/—0.71|—0.47|—0.72} 0.62/—0.43)/—0.91) 4.72|| 1799

2.75| 0.22) 2.32/—0.68] 1.52} 1.05) 0.35) 0.88/—0.42| 0.48} 0.05) 0.07

1801 ||/—-0.86| 2.63] 0.00|-1.00|—2.86|-1.61| 0.89] 0.92/—0.39] 0.19] 0.22] 1.94
1802 1.85 |—2.99|—3.76|—2.68|—0.44| .. e- ee o- « aie ee
1816 ee se at oe ee - - | 0.09|—0.98|—0.12|—0.15|—0.01|—6.91

1817 ||—1.55|—2.46|—4.17| 0.37|—1.32/—0.79|—1.63 | -0.28 |—0.41|—1.65|—0.52|—1.73
—5.58|—5.13|—4.00| 2.56|—0.90/—0.84| 0.52] 0.15|—0.71|—1.97|/—1.82|—0.42

—2.74| 0.94|—0.35| 0.98/—0.91|/—0.97|—3.78|—2.29|—2.30} 1.78] 1.38) 3.15
1820 4.16| 0.14] 0.35|—2.15| 0.97] 0.66|/—0.96!—1.57|—0.72|—0.06} 1.60) 1.19
1821 0.04) 0.42] 1.30] 1.00/—0.07| 0.68) .. ee ee ee ee o-

1841 ee °° ee ee ee e- oe -- | 0.45) 0.14/—0.27|) 0.23
1842 1.13)}—1.15|—1.12] 1.56} 2.03] 0.37) 0.89) 0.34] 1.39) 1.95|—0.37|—1.37

1843 0.11| 4.74] 4.65) 2.18] 1.18] 1.16] 1.52) 0.72) 1.57) 1.66|—2.89|/—3.93
1844 |/—0.13] 0.40/—0.51|—3.10|—1.29] 0.79] 0.78] 1.39] 0.66) 0.19/—1.08) 0.01
1.54] 0.76) 3.98] 2.34) 0.24) 0.32) ..| e« ee

ms | ss ms a a | =

—8.72|—8.64|—7.29|—4.44| 0.07) 3.15] 4.41] 3.93] 1.62|—0.96|—4.47/—6.45 || Means. |

The numbers without sign must be subtracted; those with the sign — must be added.

F 115

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681

CORRECT EONS

FORCE OF VAPOR AND RELATIVE HUMIDITY.

HOURLY CORRECTIONS FOR PERIODIC VARIATIONS,

OR
TABLES

FOR REDUCING THE MEANS OF THE OBSERVATIONS TAKEN AT ANY HOUR OF THE
DAY TO THE TRUE MEAN FORCE OF VAPOR AND RELATIVE HUMIDITY
OF THE DAY, OF THE MONTH, AND OF THE YEAR.

al

\
* os ae Ped oa \
+ { %
’ - . aan s e7
'
. : em ope
.

}
rg

XCVIII. 683
Enc ranp.—Greenwicu. Lat. 51° 29’ N.; Long. 0° 0’.
Corrections to be applied to the Means of the Hours of Observation, or Sets of Hours,
to obtain the true Mean Force of Vapor for the respective Months, (GLAISHER.)

English Inches.
Hours. Jan. | Feb. |March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Mean. ||
en Inch inch, Inch. Te Inch. mene Inch. | Inch. | Inch. | Inch. | Inch. | Inch.
Midn... -006| .006|} .008) .017| .026|) .031| .028) .025| .024) .018|] .010} .009| .017
1 -011} .008} .010} .021) .028] .037| .031} .031]) .030} .020} .012| .010} .021 ||
2 -015| .010) .011) .024! .031| .043| .036| .035| .035|) .021|) .015) .010) .024
3 -015| .011| .013] .027| .032] .048] .038] .039| .037| .023] .017| .011| .026 ||
4 -015| .013) .015| .029| .031]) .047! .037) .040} .040} .025) .019) .011| .027
5 -015| .014| .016| .029| .027| .037} .031] .038) .040) .023) .021) .011] .025 |
6 -014| .015| .016| .025) .019; .022} .019} .029] .033) .021| .021) .010} .020
7 -013| .014| .014] .016]} .007|} .008} .007| .014| .022} .018| .018} .009| .013 |
8 -010| .010| .010} .005|—.005|—.004|/—.004| .000) .010) .011) .012) .007} .005
9 -007| .006| .005| .005|—.016/—.015|—.014/—.012|/—.005| .005| .005)} .005/—.002

10 -002) .000)—.003|—.013|—.024)/—.027|—.019 |—.021 |—.019|—.005|—.004| .001|/—.010
11 ||—.004|—.005 |—.007|—.020 | —.028 |—.036|—.025 | —.027|—.027|—.009 |—.010|—.004|—.017

Noon. . . ||—.007/—.009 |—.012|—.026|—.030|—.042|—.029 |—.030|—.030)—.015|—.017|—.007|—.021
1 ||—.008 |—.013 |—.013 | —.027 |—.030 |—.045|—.033 |—.032 |—.030|—.018 |—.019|—.008 |—.023
2 ||—.007|—.015|—.013|—.027|—.028 |—.043|—.034|—.034|—.029|—.017|—.020|—.008|—.023
—.007 |—.012 |—.012|—.025 |—.026 |—.039|—.033 | —.031|—.027|/—.014|—.016|—.008|—.021

w

4 ||—.007|—.010|—.010/—.020|—.021 |—.035|—.028 | —.027|—.021 |—.009|—.010|—.007|—.017 ||
5 ||—.004|—.006 |—.006|—.014|—.015|—.025|/—.021 |—.020|—.017/—.006 |—.005 |—.005/—.012
6 ||—.002/—.004|—.002|—.006|—.010|—.017|—.016|—.015|—.010/—.004| .000|—.003|—.007
7 |/—.001;—.001} .002] .001|—.004/—.007|/—.007|—.006|—.003] .003] .004/—.001|—.002

8 -000} .001/ .004| .005| .005| .005| .004| .004) .004) .005| .006| .001| .004

9 -000| .003! .005) -007] .013| .015] .010} .010) .008) .008| .008} .004) .007 |

10 001} .004} .007} .010] .017| .023| .017| .015} .013) .011| .009] .005) .011 ||

| 11 -002| .005) .008) .014/ .022) .029) .024) .020) .018; .014) .010) .006|. .014

| 6. 6 -006) .005] .007; .009} .005|) .003| .001) -007| .012) .008) .010) .004| .006
7. 7 -006|} .006) .008} .009} .001} .000; .000) .004| .009; .011} .011} .004) .005

8. 8 -005! .005|} .007| .005} .000) .000; .000| .002] .007} .008) .009| .004) .005

ene 003} .004| .005] .006|—.002]} .000/—.002/—.001| .002| .006| .007| .004| .003
10.10 -001| .002| .002)/—.002|—.003|—.002|—.001 |—.003|—.003| .003) .002) .003) .000
7 2.9 -002| .001| .002)/—.001|/—.003|—.007/—.006|/—.003} .000| .003} .002) .002|—.001

6. 2. 8 -002} .000} .002} .001/—.001|—.005|—.004)—.000) .003) .003) .002) .001) .000
6. 2.10 -003| .001|} .003) .003] .002| .001} .001} .003} .006) .005} .003) .002| .003
6. 2. 6 -002|—.001| .000)—.003 |—.006 |—.013/—.010|—.007 |—.002} .000) .000|—.000)—.065

2 -003|—.000} .000)—.005|—.011|—.017|—.014/—.010/—.003) .000/—.001) .000|—.005
8. 2 -001 |—.002 |—.001|—.011|—.017|—.023|—.019 |—.017|—.009 |—.003|—.004|—.000|—.009
1 -001 |—.001|—.001|—.011|—.017 |—.025|—.018 | —.016|—.010|—.004|—.004|—.000/—.009
1 -002} .007; .000|/—.005|—.012|—.018/—.013|—.009|—.004|—.000|—.000} .000|—.005

|e —.002|—.003 |—.003 —.010|—.015 —.020/—.016 | —.016|—.013|—.004|—.005 |—.001|—.009

The numbers without sign must be added; those with the sign —- must be subtracted.

BE 119

684

ENGLAND. — GREENWICH.

wo bv

IO 1

Noon.

-036
-021
-007
—.005

—.014
—.016
019
—.018

—.007
=.012
—.017

—.016
—.011
-008

-008
—.006
015

-019
-019
-017
O17

O11

XCIX.

Lat. 51° 29’ N.; Long. 0° 0’.
Corrections to be applied to the Means of the Hours of Observation, or Sets of Hours
to obtain the true Mean Humidity for the respective Months.

-064

Thousandths.

Feb. |March.} April. | May. | June. | July.
—.021|—.063|—.095|—-.087/—.105|—.091
2|—.021/—.065]—.106|—.100)—.114/—.095
—.026|—.066|—.116|—.108|—.125/—.107
—.033 |—.067/—.123|—.113/—.132|/—.116
—.036 |—.068 | —. 126 |—.114|/—.138/—.120
—.035|—.066|—.125/|—.106|—.139|/—.120
—.034/—.063]/—.112|—.085|/—.107|—.097
—.030|—.055|—.080|—.059 |--.065|—.055
—.020]—.035 |—.065 |—.024|—.015/—.005
—.007|--.003|—.034| .018] .035) .041
-009| .031/—.015| .051| .078] .080
-028} .060| .022) .083| .100| .104
-045| .084| .070) .110|) .123} .114
-058} .100| .132| .126) .137| .119
065} .106) .151}) .125) .135] .123
-065| .104| .147| .118| .123) .121
-053] .087| .128} .108} .113) .111
-032] .063} .110} .091} .099| .095
-009| .038|} .088} .074| .078} .062
—.010) .010| .059| .052) .049| .025
—.023/—.010| .020] .022) .010/—.015
—.029|—.032/—.030|—.015 |—.025)—.040
—.030|/—.048 |---058 |—.050 |—.060|—.068
—.036|—.060|—.080|—.075 |—.085|—.080
—.012)/—.012|—.012/—.005)/—.015|—.017
—.020|—.023|—.010}—.004/—.008|—.015
—.021|/—.023|—.022|—.001 |—.003|—.010
—.018/—.018/—.032} .000] .005} .000
—.010/—.009|—.037} .000) .009| .006
-002| .006|} .014| .016| .015} .009
-003} .011} .019| .021} 13] .004
-000|—.002|—.006 |—.003 |—.010)- .014
-013| .027] .042| .038] .035| .029
-017| .026) .036| .033| .035| .034
.022) .036| .043) .050} .060) .059
-019| .032] .034] .051| .061| .057
-014} .023) .026| .033) .036) .032
—.018} .038| .038| .032 159

Aug.

—.096
—.104
—.113
—.117

—.123
—.123
—.107
—.061

—.020
-030
-070
-102

127
-142
145
-138

-120
-100
-071
-036

-000
—.038
—.067
—.085

—.018
—.012
—.010

—.004
-001

«015

-013
—.009
-036

-042
-062
-061
-041

-064

Sept.

—.080
—.080
—.085
—.091

=.097
—.098
=.097
—.080

—.047
-000
-042
-082

-115
e151
-132
-126

-103
-071
O44
-009

—.O15
—.040
—.058
Hi Vel

—.027
—.035
—.031

—.026
—.008
-004

-016
—.008
-026

Oct.

—.053
—3059
—.066
—.070

—.075
= 34d.
—.071
—.058

—.037
—.009
025

-060

-088
-109
113
-108

-089
-055
-030
-007

—.011
—.025
—.039
—.048

—.020
—.026
—.024

—.017
—.007
-010

-010
-001

(GLAISHER.)

Nov.

—.018
—.009
O11
—.020

—.030
—.030
—.033
—.031

—.021
—.008
-008

-027

-040
-050
-054
-047

-032

-018;

-005
—.005

—.012
= O17
—.020
—.020

—.014
—.018
—.016

—.012
—.006
-002

-003
-000

024

-027
-038
-036
-026

-040

-009

-012
-016
-O14
-009

-016

The numbers without sign must be added; those with the sign —- must be subtracted.

120

Dec. | Mean.
—.011|—.061
—.012|—.064
—.017|—.069
—.019/—.075
—.024/—.080
—.024/—.080
—.026/—.071
—.025|—.052

|
—.01S|—.027 |
—.007) .003

-008| .032

022) .058

-033| .082

-046) .100

048) .105

2036| .098

.024| .084

-.013|} .064

-004| .042
—.003] .019
—.005|—.004
—.007|—.026
—.008|—.044
—.009|—.055
—.011/—.015
—.014/—.017
—.011|/—.016
—.007|—.012

-000|—.006

-005| .009

-006} .010

-005|—.00Q7

009] .028 i

\

-O11| .026

-015] .039

014) .037

.010| .024

-014' .037

=
4 Seton

a

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ES

tate

685

METEOROLOGICAL TABLES.

SERIES VIL.

MISCELLANEOUS TABLES,

USEFUL IN

TERRESTRIAL PHYSICS AND METEOROLOGY.

Mable ll.

oe

oe

“ce

iT:

EET.

VE:

VI.

VIET:

VITE.

IX.

687

CONTENTS.

Positions of the Principal Observatories. From the American,
English, and German Nautical Almanacs ; 3

To convert Parts of the Equator in Arc into Sidereal Time, or to
convert Terrestrial Longitude in Arc into Time. From Downes,
U. S. Almanac for 1845, as given in Lee’s Tables and Formule,
2d edition, p. 146 et seq. et : ° : : .

To convert Sidereal Time into Parts of the Equator in Are, or to
convert time into Terrestrial Longitudein Are. From Downes,
U. S. Almanac for 1845, p. 150, and Lee’s Tables and Formule

For converting Sidereal Time into Mean Solar Time, and Mean
Solar Time into Sidereal Time. From Lee’s Zables and
Formule

. Correction of the Time ahiaihed by Cneeeatos of the Sin, in

order to have the True Time of the Clock. Communicated by
Prof. B. Peirce, of Harvard University :
Tables giving the length of a Degree of the Meridian and of ite
Parallel, calculated according to the formula of Clarke .
For computing Terrestrial Surfaces, based on the preceding Tables
1) Quadrilateral surfaces of 1 degree

2) ee ee sé 2 degrees

3) “ce oe ce 5 ce

4) 6é oe ce 10 74 5

3) &“ 66 6 1,10, 205 and 30 n minutes

Comparison of ‘the Standards of lone of England, France,
Belgium, Prussia, Russia, India, and Australia
Table giving the Jength of Insolation for any given Latitude

PAGE

or

bf

13

14
19
20
22
25
23
24

fe

POSITIONS OF THE PRINCIPAL OBSERVATORIES.

(North Latitudes and West Longitudes are considered as positive.)

689

Longitude.
Place. Latitude.
Washingtoa Washington. Greenwich. Greenwich,
oO / vs h m 3 Oo / // h m 8 Oo / /t
Abo, +60 26 56.8)— 6 37 20.3}— 99 20 4.5)— 1 29 8.2|\—22 17 3.0
Albany, +42 39 49.5. — 0 13 12.9;— 3 18 13.5 + 4 54 59.2/4-73 44 48.0
Alfred Centre, +42 15 19.8) 0 2 55.0)4+ 0 43 45.0)+ 5 11 7.1)/4+77 46 46.5
Algier, +36 45 2.7/— 5 20 23.5|— 80 05 °52.5J— 0 12 11.4,— 3 2 51.0
Allegheny, +40 27 41.6/4+ 0 11 50.8/+ 2 57 42.0]+ 5 20 2.9)+50 0 43.5
Altona, +53 32 45.3\— 5 47 58.4/— 86 59 36.0}— 0 39 46.3\— 9 56 34.5
Amherst, +42 22 15.6,— 018 4.8)— 4 31 12.0]+ 4 50 7.38/72 31 49.5
Annapolis, +38 58 53.5\— 0 2 15.6/— 0 33 54.0]44+ 5 5 56.5 +76 29 7.5
Ann Arbor, +42 16 48.0\+ 0 26 43.1/+ 6 40 46.5 + 5 34 55.2)+-83 43 48.0
Armagh, +54 21 12.7\— 4 41 36.6}— 70 24 9.0)]4 0 26 35.5)4+ 6 38 52.5
Athens, 4-37 58 20.0\— 6 43 7.8|—100 46 57.0/— 1 34 55.7|—23 43 55.5
Berlin, +52 30 16.7/— 6 1 47.0/— 90 26 45.0j— 0 53 34.9/—13 23 43.5
Berne, +46 57 8.7/— 5 37 58.1J]— 84 29 31.5]— 0 29 46.0;— 7 26 30.0 !
Bethlehem, +40 36 23.9\— 0 6 40.2}— 140 3.0])+ 5 1 31.9/4-75 22 58.5
Bilk, +51 12 25.0;— 5 35 17.0J— 83 49 1.5}— 0 27 4.9|— 6 46 13.
Birr Castle,! +53 5 47.0\— 4 36 31.2;— 69 7 48.0;4+ 0 31 40.9/4 7 55 13.5
Bologna, +44 29 47.0/— 5 53 36.7/— 88 24 10.5|— 0 45 24.6/—11 21 9.0
Bonn, +50 43 45.0;— 5 36 35.4/— 84 8 51.0j— Q 28 23:3\— 7 5.49.5
Bordeaux, +44 5017.0\— 5 6 5.0/— 76 31 15.0-+ 0 2 7.0)+ 0 31 45.0
Bothkamp,? +54 12 9.6)— 5 48 42.9/— 87 10 43.5;— 0 40 30.8|—10 7 42.0
Breslau, +51 6 56.5,— 6 16 20.8\— 94 5 12.0;—1 8 8.7 —17 2 10.5
Brussels, +50 51 10.5|— 5 25 40.7|— 81 25 10.5;— 0 17 28.6/— 422 9.0
Cairo, +30 4 38.2i— 7 13 21.0/—108 20 15.0j— 2 5 8.9/—31 17 13.5
Cambridge, Eng., [+52 12 51.6\— 5 8 34.8|\— 77 8 42.0j)— 0 0 22.7,— 0 5 40.5
|Cambridge, Mass., |4+42 22 48.3/— () 23 41.1|— 5 55 16.5)4 4 44 31.0/+71 7 45.0
Capetown, —33 56 3.4,— 6 22 7.1/— 95 31 46.5|— 1 13 55.0/—18 28 45.0
Chapultepec, +19 25 17.5)}+ 1 28 26.1/4+ 22 6 31.5]/+ 6 36 38.2 +99 9 33.0
Charkow, +50 0 10.23— 7 33 6.8)/—113 16 42.0)— 2 24 54.7),—36 13 40.5
Chicago, +41 50 1.0\+ 0 42 14.7/4 10 33 40.5)4+ 5 50 26.8/487 36 42.0
Christiania, +59 54 43.7,— 5 51 5.9/— 87 46 28.5]|— 0 42 53.8)—10 43 27.0 |
|| Cincinnati, (N.Ob.)|+39 8 35.5/-+ 0 29 29.3/+ 7 22 19.5]4 5 37 41.4/4-84 25 21.0
Clinton, +43 3 Li. 0) Or 6 34.6,— 1 38 39.0])+ 5 1 37.4/475 24 21.0
|| Coimbra, +40 12 25.81\— 4 34 37.6\— 68 39 24.0/4+ 0 33 34.5)/4+ 8 23 37.5
Copenhagen, +55 41 13.6|— 5 58 31.3/— 89 37 49.5j/— 0 50 19.2/—12 34 48.0
Cordoba, —31 25 15.4/— 0 51 27.0/— 12 51 45.0/]4 4 16 45.1/+64 11 16.5 |
1 Lord Rosse. 2 Herr v. Bulow.
G 5

|

690

|
|
|
|
|

|
|
|

Longitude.
Place. Latitude.
Washington. Washington. Greenwich. | Greenwich.
‘Ors Vt h m s Ow // h m oe On + yy}
|| Cracow, +50 3 50.0\— 6 28 2.6\— 97 0 39.0\— 1 19 50.5'—19 57 37.5 |
|| Dantzic, 454 21 18.0|\— 6 22 51.4\— 95 42 51.0|— 1 14 39.318 39 49.5 |
| Dorpat, 4.58 22 47.4\— 6 55 5.6|—103 46 24.0|\— 1 46 53.5'—26 43 22.5
Dresden, 4+51 216.8|\— 6 3 6.9\— 90 46 43.5|— 0 54 54.8—13 43 42.0
Dublin, +53 23 13.0\— 4 42 50.0\— 70 42 30.0]4+ 0 25 22.04 6 20 30.0
Dun Echt,! 457 9 36.0|\— 4 58 32.1.— 74 38 1.5/4 0 9 40.04 2 25 0.0
Durham, 45446 6.2\— 5 1 52.3\— 75 28 4.5144 0 6 19.84 1 34 57.0
Dusseldorf, +51 12 25.0\— 5 35 17.0\— 83°49 15.0/— 0 27 5.0— 6 46 15.0
Edinburgh, 455 57 23.2|— 4 55 29.0\— 73 52 15.0]/4 0 12 43.04 3 10 45.0
Florence, 443 46 4.1|— 5 53 13.6|— 88 18 24.0/— 0 45 ee 15 22.5
Geneva, +46 11 58.8|\— 5 32 48.9\— 83 12 13.5|/— 0 24 36.8— 6 9 12.0
Georgetown, 438 54 26.2/+ 0 0 6.2\+ O 1 33.044 5 8 18.3477 4 34.5
Glasgow, Scotland, |+55 52 42.83— 4 51 1.5|\— 72 45 22.5144 017 10.6-+ 4 17 39.0
Glasgow, Mo., +39 16 16.8\+ 1 3 5.9/+ 15 46 28.544 6 11 18.0492 49 30.0
Gotha, +50 56 37.5\— 5 51 2.6|— 87 45 39.0j— 0 42 50.5 —10 42, 37.5
Gittingen, +51 31 47.9\— 5 47 58.3|— 86 59 34.5|— 0 39 46.2 — 9 56 33.0
Greenwich, #25198 BG 4\— "5 S12 — 77." 357425 isOL00 0)” |5, SOmOune
Hamburg, +53 33 7.0|I— 5 48 5.8i— 87 1 27.0\— 0 39 53.7/— 9 58 25.5 |
Hanover, +43 42 15.0\— 019 4.1|\— 446 1.5}4- 4 49 8.0/4 72 17 (0.0
Hastings, +40 59 25.0|— 0 12 42.4|— 3 10 36.0/+ 4 55 a 52 25.5
‘Haverford, +40 0 36.5\— 0 6 59.3\— 1 44 49.54- 5 1 12.7/4-75 18 10.5 |
Helsingfors, +60 9 43.3\— 6 48 1.2/—102 0 18.0l— 1 39 49.2|—24.57 18.0
Herény, +47 16 37.0/— 5 48 57.2|— 87 14 18.0 0 40 45.1/—10 11 16.5
Hudson, +41 14 42.6/+ 017 32.14 4 23 1.514+ 5 25 44.2/+81 26 3.0
Kalocsa, 446 31 41.2\— 6 24 .7.8\— 96 1 57.0/— 1 15 55.7/—18 58 55.5
Kasan, +55 47 24.2|— 8 24 41.0\—126 10 15.0|— 3 16 28.9|—49 7 13.5
Kew, +5128 6.0\—5 6 57.0\— 76 44 15.0]/+ 0 1 15.1/4+ 0 18 46.5
Kiel, +54 20 29.7/— 5 48 47.9\— 87 11 58.5|— 0 40 35.8I—10 8 57.0
| Kiew, +50 27 11.1\— 7 10 12.7 —107 33 10.5}.— 2 2 0.6—30 30 9.0
Konigsberg, +54 42 50.6|— 6 30 11.0\— 97 32 45.0|— 1 21 58.9|—20 29 43.5
|
_Kremsmiinster, 4-48, 93 9371— 6 4:4413/— "91 11 4.510156, 32:2|— 14 aeaeoo
Leyden, 1-52) 9.20.0, 5 26 8:4\—-81 32° 6:0i— 0117 56.3/—- 4 aoe
Leipsic, +51 20 6.3\— 5 57 46.1\— 89.26 31.5} 0 49 34.0/—12 23 30.0
Leyton,? 451 34 34.0;\— 5 811.2,— 77 248.04 0 0 0.9/4+ 0 0 13.5
|| Lisbon, Marine, |+38 42 MS 4 31 38.5\— 67 54 37.5/4+ 0 36 33.6/+ 9 8 24.0
| Lisbon, Royal, +38 42 31.3\— 4 31 27.4\— 67 51 51.0/+ 0 36 44.7/4- 9 11 10.5
Liverpool, +53 24 4.0\— 4 55 54.9|\— 73 58 43.514 0 12 17.2/4 3 4 18.0
Liibeck, +53 51 31.2— 5 50 57.6.— 87 44 24.0\— 0 42 45.5/—10 41 22.5
Lund, se 41 52-6) 0 Huet 90 14 16.5|— 0 52 45.0|—13 11 15.0
Madison, +43 4 36.74 0 49 25.84 12 21 27.01+ 5 57 37.9/489 24 28.5
1 Lord Lindsay. 2 J. G. Barclay.
G 6

palettes en.

Se a ne

el ep ee ee ee

691

Longitude.
Place. Latitude.
Washington. Washington. Greenwich. Greenwich.
(ayer 2 8 One " h m 8 Ou I
Madras, +13 4 8.1/—10 1.5|—157 17 52.5|— 5 20 59.4,— 80 14 51.0
Madrid, +40 24 % 26.7;— 73 21 40.5]4+ © 14 45.44 3 41 21.0
Mannheim, +49 29 2.6,— 85 30 39.0/— 0 33 50.5|— 8 27 37.5
Marburg, +50 48 17.1— 85 49 16.51.— 0 35 5.0/— 8 46 15.0
Markree,! +54 10 : 23.7/— 68 35 55.8]+ 0 33 48.4/4+ § 27 6.0
Marseilles, +43 18 46.7|— 82 26 40.5]|— 0 21 34.6\— 5 23 39.0
Melbourne, —37 49 6.9/—222 1 43.5|— 9 39 54.8)—144 58 42.0
|| Mexico, +19 26 14.6/4+ 22 3 39.0]4 6 36 26.7|/4+ 99 6 40.5
|| Milan, +45 27 58.1\— 86 14 31.5|— 0 36 46.0|\— 9 11 30.0
Modena, +44 38 54.9/— 87 58 43.5I— 0 43 42.8/— 10 55 42.0
Montsouris, +48 49 32.8iI— 79 23 12.0J— 0 9 20.7,— 2 20 10.5
Moscow, +55 45 29.0/—114 37 15.0J— 2 30 16.9|— 37 34 13.5
Mt. Hamilton,? +37 21 14.6/+ 44 33 39.0]+ 8 6 26.7/+121 36 40.5
Munich, +48 8 38.2\— 88 39 33.0l— 0 46 26.1)/— 11 36 31.5
Naples, -40 51 13.0\— 91 18 15.0j— 0 57 0.9/— 14 15 13.5
Neuchatel, +46 59 5 2.3\— 84 0 34.5|— 0 27 50.2|— 6 57 33.0
New Haven, +41 18 ; 0 29.9\— 4 7 28.5)4+ 4 51 42.2)4- 72 55 33.0
New York,? +40 45 0 18.4-— 3 4 36.0I4- 4 55 53.7|/+ 73 58 25.5
Nikolajew, +46 58 a 6.2—109 1 33.0Jj— 2 7 54.1)— 31 58 31.5
Odessa, +46 28 7 14.4, —107 48 36.0J— 2 3 2.3/— 30 45 34.5
Ogden, +41 13 2°19 47.5,-4+ 34 56 52.5[4+ 7 27 59.6)4-111 59 54.0
0-Gyalla, +47 52 6 57.7\— 95 14 25.5J,— 1 12 45.6)— 18 11 24.0
Olnutz, +49 35 6 14.7,— 94 18 40.5J— 1 9 2.6)— 17 15 39.0
Oxford, Radcl. +51 45 5 9.5\— 75 47 22.544 0 5 2.6/4 1 15 39.0
Oxford, Miss. +34 22 0 55.0 + 12 28 45.0)+ 5 58 7.1/+4+ 89 31 46.5
Padua, +45 24 5 41.2,— 88 55 18.0j— 0 47 29.1/— 11 52 16.5
Palermo, 14+38 6 6 37.1\— 90 24 16.5J.— 0 53 25.0/— 13 21 15.0
Paramatta, —33 48 5 18.3 —228 4 34.5/—10 4 6.2/—151 1 33.0
Paris, Nat. +48 50 5 33.1.— 79 23 16.5J— 0 9 21.0)— 2 20 15.9
Petersburg, +59 56 7 25.6|—107 21 24.0jh— 2 1 13.5|— 30 18 22.5
Philadelphia, +39 57 0 33.6\— 1 53 24.0/+ 5 0 38.5/+ 75 9 37.5
Plonsk, +52 37 6 16.0\— 97 34 0.0j— 1 22 4.0|— 20 31 0.0
Pola, +44 51 6 3 35.3— 90 53 49.5|— 0 55 23.2;— 13 50 48.0
Portsmouth, +50 48 5 3 48.2— 75 57 3.0/+ 0 4 23.9/4+ 1 5 58.5
Potsdam, +52 22 6 029.0— 90 7 15.0j— 0 52 17.0)— 13 4 15.0
Poughkeepsie, 441 41 0 12 38.5\— 3 9 37.5/+ 4 55 33.6/4+ 73 53 24.0
Prague, +50 5 6 5 53.5.— 91 28 22.5|— 0 57 41.4)— 14 25 21.0
| Princeton, +40 20 0 9 34.5),— 2 23 37.5|+ 4 58 37.6|+ 74 39 24.0
Providence, +41 49 0 22 34.5\— 5 38 37.5]4 4 45 37.6/+ 71 24 24.0
Pulkova, +59 46 7 9 30.8—107 22 42.0jJ— 2 1 18.7/— 30 19 40.5
' Col. Cooper. 2 Lick. 3 Columbia Col. |
G 7

Place.

|

| Quebee,

| Rio Janeiro,
|| Rochester,
| Rome,

| San Fernando,
| Santiago,

| Schwerin,

| Senftenberg,
|| Speyer,

| St. Louis,

i Stockholm,
|| Stonyhurst,

| Strassburg, N. Obs.

Sydney,
| Taschkent,

Toulouse,

_ Trieste,

\| Troy,

| Tulse Hill,}
| Turin,

| Twickenham,?
Upsala,
Utrecht,

| Venice,

Warsaw,

| Washington,
|| West Point,

| Whitestone,

oe

Wilna,

Zurich,
|

Vienna, New Obs.

| Wilhelmshaven,

| Williamstown, Mass
Victoria.

Windsor, N.5.W.3

Longitude.
Latitude.
Washington. | Washington. Greenwich. | Greenwich.
Oo, i h m | Owes /] h m 8 ov 1
446 48 17.3\— 0 23 22.8— 5 50 42.0/4 4 44 49.3/4 71 12 19.5
—22 54 23.8\— 2 15 30.7 — 33 52 40.5|4 2 52 41.44 43 40 21.0
443 8 15.0/+ 0 3 8.04 047 0.04 5 11 20.04 77 50 0.0
441 53 53.7|— 5 58 6.8— 89 31 42.0|— 0 49 54.7/— 12 28 40.5||
436 27 41.5\— 4 43 22.5|— 70 50 37.514 0 24 49.6/4+ 6 12 24.0
33 26 42.0\— 0 25 ane 6 22 25.5/4+ 4 42 42.44 70 40 36.0
453 37 38.2\— 5 53 52.8— 88 28 12.01 0 45 40.7 — 11 25 10.5)
+50 5 10.1|— 6 14 2.7\— 93 30 40.5J— 1 5 50.6\— 16 27 39.0)|
+49 18 55.4|— 5 41 57.7|— 85 29 25.5|— 0 33 45.6\— 8 26 24.0)
438 38 3.6/— 0 52 37.0.4 13 9 15.04 6 0 49:1/4 90 12 16.5
+59 20 33.0\— 6 20 26.1— 95 6 31.5|— 1 12 14.0 18 3 30.0]
453 50 40.0\— 4 58 19.4\— 74 34 51.014 0 9 52.7/4 2 28 10.5]
448 34 59.7|— 5 39 16.7|— 84 49 10.5|— 0 31 4.7\— 7 46 10.5]
—33 51 41.1—15 13 2.7/—228 15 40.5|—10 4 50.6151 12 39.0]
+41 19 32.2/— 9 45 22.9|—146 20 43.5|— 4 37 10.8\— 69 17 42.0]|
4-43 36 47.0\— 5 14. 3.2|\— 78 30 48.0— 0. 5 51.1/—- 1 27. 46.5]
+45 38 34.0\— 6 3 14.2|— 90 48 33.0-- 0 55 2.1|\— 13 45 31.5
442 43 52.0\— 0.13 27.5|\— 3 21 52.514 4 54 44.6/4 73 41 9.0)
+51 26 47.0\— 5 7 44.4\— 7656 6.0lL 0 0 27.74 0 6 55.5]|
+45 4 6.0/- 5 39 0.5|— 84 45 7.51 0 30 48.4' 7 42 6.0)
45127 4.2|— 5 6 59.0\— 76 44 45.014 0 113.14 0.18 16.5
459 51 -31.5|— 6 18 42.7|— 94 40 40.51 1 10 30.6/— 17 37 39.0
452 5 10.5\— 5 28 43.8\— 82.10 57.0/— 0 20 31.7\— 5 7 55.5I|
+45 25 49.5|\— 5 57 37.5\— 89 24 22.51 0 49 25.4|_ 12 21 21.0
+48 13 55.4|— 6 13 33.3\— 93 23 19.5]— 1 5 21.2.— 16 20 18.0
|
+52 13 5.7|— 6 32 19.5|— 98 4 52.51 194 7.4| 21 1/51.0
438 53 38.8\—0 0 0.0| 0 0 0.014 5 8 12.114 77 3) 1.5
441 23 31.0\— 0 12 22.7/+ 3 5 40.5)4 4 55 49.4/4 73 57 21.0
+40 47 20.0/— 013 4.6\— 316 9.0l+ 4.55 7.5|4 78 46 52.5
453 31 52.0\— 5 40 47.3|— 85 11 49.5|— 0 32 35.2— 8 8 48.0
+42 42 49.0\— 0 15.18.6— 3 49 39.0/+ 4 52 53.5/4+ 73 13 22.5
—37 52 7.2|—14 47 50.9/—221 57 43.5|— 9 39 38.8—144 54 42.0
454 41 0.0\— 6 49 24.0\—102 21 0.Q)— 1 41 11.9— 25 17 58.5
—33 36 28.9/—15 11 33.8|\—227 53 27.0|—10 3 21.7150 50 25.5
+47 22 40.0|— 5 42 24.7\— 85 36 10.51 0 34 12.6— 8 33 9.0
2 G. Bishop. 3 J. Tebbutt.

1 W. Huggins.

29
30
31
32
33

34
35

36
37
38

23
24
25
26
27
28
| 39

Tl.

bw hw hw by Ne = = pt et pet pe pte ett i a) oS oo oS

bo he kw be Pb

TO CONVERT PARTS OF THE EQUATOR IN ARC INTO SIDFREAL TIME, Ob
TO CONVERT TERRESTRIAL LONGITUDE IN ARC INTO TIME.

44
48
52
56

12
16
20

24
28
32
36

Al
42
43
44
45

46
47
48
49
50

51

53
54
55

56
57
58
59
60

61
62
63
64
65

66
67
68
69
70

71
72
73
74
75

76
77
78
79
80

694

wow p —
Nor CONOR”

cococoeo osooco os
cy bn
a

ove mntn oh wd

—_
_~
o

Se
0.067
0.133
0.200
0.267
0.333

0.400
0.467
0.533
0.600
0.667

op mntn Ar WD RS

—_

Q

13
14
15

16
17
18
19
20

s.
0.733
0.800
0.867
0.933
1.000

1.067
1.133
1.200
1.267
1-333

Are.

oO
281
282
283
284
285

“286

287
288
289
290

291
292
293
294
295

296
297
298

“

21
22
23
24
25

26
27
28
29
30

Time.

DEGREES.

Arc.

oO

301
302
303
304
305

306
307
308
309
310

311
312
313
314
315

Time.
h. m.
20 4
20 8
20 12
20 16
20 20

wwownww wnwonwnws

342
343
344
345

346
347
348
349
350

351
352
353
354
355

356
357
358

TO CONVERT PARTS OF THE EQUATOR IN ARC INTO SIDEREAL TIME, OR
TO CONVERT TERRESTRIAL LONGITUDE IN ARC INTO TIME.

23
23
23
23
23

23
23
23
23
23

23
23
23

24
28
32
36
40

44
48
52

PwWwwww wwww wh
_
=)

SEcONDS
s. ff
1.400 Sl
1.467 32
1.533 33
1.600 34
1.667 35
1.733 36
1.800 37
1.867 38
1.933 39
2.000 40

10

“

41
42
438
44
45

46
AT
48
49
50

2.733
2.800
2.867
2.933
3.000

3.067
3.133
3.200
3.267
3.333

8.

3.400
3.467
3.533
3.600
3.667

3.733
3.800
3-867
3.933
4.000

695
III. TO CONVERT SIDEREAL TIME INTO PARTS OF THE EQUATOR IN ARC, OR
TO CONVERT TIME INTO TERRESTRIAL LONGITUDE IN ARC.

Time. Are Time. Are. Time. Arc. Time. Arc.

h is h. if h. s h. é h. = |

5 15 9 | 135 13 | 195 17 | 255 21 315 |

6 90 10 | 150 14 | 210 18 | 270. || 22 330

7 105 11 | 165. ||-15 | 225 19 | 285 23 345

8 120 12 | 180 16 | 240 20 | 300 24 360

MINvuTES

m. Ont m. one m. OL m Oona m m 6 Ne
Ono eli) |. 2.45 I eae SLIb esi | pe 4e etd 51 | 12 45
2 | 030 | 12 | 3 0 || 22 | 5 30 || 32 | 8 o |] 42 52 | 13 0
Sree 45 1 13) fg) 1S «| 23 «5 45> || 138] BoB. ||. 4s 53 | 13 15
Ae On oid, |S) 30-24) 6 +0 1e34) | 28380) red 54 | 13 30
5 | 115 | 15 | 3 45 || 25 | 615 || 35.| 8 45 || 45 55 | 18 45
Gealede208-|| 16) 04) s0yl) .26:.\)06. 30 el 286-119", 0:1 46 56 | 14 0
Tet eaee| Ue (senso Og kG! 4oal| Sa (oO Mine Az 57 | 14 15
So le2 Oil 180 lea so! 28% |) 7 ) On >88< |-.9 30) | 48 58 | 14 30
BD. W5e On 4) 4G al) 29 slu% 15 alles, 9. 45,49 | 12154] Bow. |. ta 45
10 | 230 || 20 | 5 0 || 30 | 7 30 12 30 || 60 | 15 0

Ss. 1 7] 8. t " Ss. 1 “ s. 1 “" s. 1 " s.
1 0 15 11 2 45 21 5 15 31 7 45 41 | 10 15 51 12 45 ||
2 0 30 12 3 0 22 5 30 32 8 0 42 | 103 52 13 0
3 0 45 13 3.15 23 5 45 33 8 15 43 | 10 45 53 13 15
4 LA) 14 3 30 PA GO) 34 & 30 44 | 11 0 54 13 30
5 lets 15 3 45 25 6 15 35 8 45 45 | 11 15 55 13 45
6 1 30 16 4 0 26 6 30 36 9 0 46 | 11 30 56 140
7 1 45 17 4 15 27 6 45 37 9 15 47 | 11 45 || 57 14 15
8 2an0 18 4 30 28 ann) 38 9 30 48 | 12 0 | 58 14 30
9 2 15 19 4 45 29 7:15 39 9 45 49 | 12 15 || 59 14 45
10 2 30 20 5 0 30 re SW) 40 |10 0 50 | 12 30 60 15 0
TENTHS OF SECONDS.
Ss. “
0.86 ; 12.90
0.87 | 13.05
0.88 | 13.20
0.89 | 13.35
0.90 | 13.50
0.91 | 13.65 ||
0.92 | 13.80
0.93 | 13.95
0.94 | 14.10
0.95 | 14.25
0.96 | 14.40
0.97 | 14.55
0.98 | 14.70
0.99 | 14.85
1.00 | 15.00

696

IV. FOR CONVERTING SIDEREAL TIME INTO MEAN SOLAR TIME,
AND MEAN TIME INTO SIDEREAL TIME.
HOURS. | MINUTES. SECONDS.
| | Mean Mean
| Mean | Sidereal | Min- | Mean Sidereal - | Mean |Sidereal ||} Sec- | or Sec- or
Hours ‘Time. Time. | utes. | Time. Time. Time. | Time. onds. |Sidereal}] onds. |Sidereal
| | Time. Time.
lami 1s f m. 8. ‘| | 8. | 8 ; 8. | 8 8. 8.
1| 0 9.83 | 0 9.86 || 1 | 0.16 | 0.16 5.08 | 5.09 1 | 0.00} 31 | 0.09
2/0 19-66 | 019.71 || 2 | 0.33 | 0.33 | 5.24 | 5.26 2 | 0.01 | 32 | 0.09
| |
3 | 0 29.49 | 0 29.57 3) 0.49 | 0.49 | 5.41 | 5.42 3 | 0.01 | 33 | 0.09
| 4 | 0 39.32 | 039.43 | 4 | 0.66 | 0.66 5.57 | 5.59 4 | 0.01 | 34 | 0.09
| 5 | 0 49.15 | 0 49.28 || 5 | 0.82 | 0.82 5.75 | 5.75 5 | 0.01 | 35 | 0.10
| |
|| | | |
6 | 058.98 | 059.14 || 6 | 0.98 | 0.99 5.90 | 5.91 6 | 0.02 | 36 | 0.10 |
It 7%] Ae 8:8hs) 1 29:00 I) p27 || WedSis! +1-15 | 6.06 | 6.08 7 | 0.02 | 37 | 0.10
| 8 | 118.64 | 1 18.85 Sr || WSS! 1.38 6.23 | 6.24 8 | 0.02 | 38 | 0.10
|| 9 | 128.47 | 1 28.71 9 | 1.47 | 1.48 | 6.39 | 6.41 9 | 0.03 | 39 | 0.11
| 10 | 138.30 | 1 38.57 || 10 | 1.64 | 1.64 6.55 | 6.57 || 10 | 0.03 | 40 | 0.11
11s) 148318 |) 148342 Te | a280) janes 6.72 | 6.74 AT) 20:03) 241s Ose
| 12 | 157.96 | 1 58.28 12 o7 1 MET | 6.88 | 6.90 12 | 0.03 | 42 | 0.12
|} 18 | 2 7.78 | 2 8.13 || 13 | 213 | 2.14 | 7.05 | 7.06 13))|) 0:04) 143) One
|| 14 | 2.17.61 | 217.99 || 14 | 2.29 "| 2.30 zen 7s 14 | 0.04] 44 | 0.12
1d | 2:27.44 | 227285 | 15 | 246 | 2.46 Sy, ERD 15 | 0.04 | 45 | 0.12
| |
\]
| 16 | 2 37.27 | 2 37.70 16 | 2.62 | 2.63 7.54 | 7.56 16 | 0.04] 46 | 013
ely al 2A7ETO a 247-56) = ised) 2279) 1) 2279 ige70) e727 ||| lve (OLODe IP 47am Oslo
| 18 2 56.93 | 2 57.42 | 18 | 2.95 | 2.96 | 7.86 | 7.89 18 | 0.05 |} 48 | 0.13
19 | 3 6.76 | 3 7.27 || 19 | 3.11 | 312 | 8.03 | 805 19 | 0.05 | 49 | 0.13
1 20 | 3 16.59 | 3 17.13 | 20 | 3.28 | 3.29 8.19 8.21 20 | 0.06 | 50 | 0.14
|
|| 21 | 3 26.42 | 3 26.99 || 21 | 3.44 | 8.45 8.36 | 8.38 21 | 0.06} 51 | 0.14
|| 22 | 336.25 | 3 36.84 22 | 3.60 | 3.61 8.52 | 8.54 22 | 0.06 |] 52 | 0.14
| 23 | 3 46.08 | 3 46.70 || 23 | 3.77 | 3.79 8.68 | 8.71 23 | 0.06 | 53 | 0-15
|| 24 | 355.91 | 3 56.56 || 24 | 3.93 | 3.94 8.85 | 8.87 24 | 0.07] 54 | 0.15
|| 25 | 4 5.74 | 4 6.41 || 25 | 4.10 | 4.11 9.01 | 9.04 25 | 0.07] 55 | 0.15
|
i] |
|| 26 | 4 15.57 | 4 16.27 | 26 | 4.26 | 4.27 9.17 | 9.20 26 | 0.07] 56 | 0.15
|| 27 | 4 25.40 | 426.13 || 27 | 4.42 | 4.43 9.34 | 9.36 || 27 | 0.07] 57 | 0.16
|| 25 | 4 35.23 | 4 35.98 || 28 | 4.59 | 4.60 9.50 | 9.53 28 | 0.08 | 58 | 0.16
| 29 | 4 45. re ee 4 45.84 || 29 | 4.75 | 4.76 9.67 | 9.69 29 | 0.08 | 59 | 0.16
30 | 45 =i 455.69 || 30 | 4.92 | 4.93 9.83 | 9.86 30 | 0.08 | 60 | 0.16
| 4
G 12

.

697

V. CORRECTION OF THE TIME OBTAINED BY OBSERVATION OF THE SUN, IN
ORDER TO HAVE THE TRUE TIME OF THE CLOCK.

|

Jan. | Feb. | Mar.| Apr. | Apr. | May.| June.| June.| July. | Aug. | Sept. | Oct. | Nov. | Dec.
Day of

Month. :
Add. | Add. | Add. | Add. | Subt.} Subt.} Subt.| Add. | Add. |} Add. | Subt.} Subt.} Subt.| Subt.} Add.

Min. | Min. | Min. | Min.| Min. | Min. | Min. | Min. | Min. | Min.

4) 14] 13 4
14 | 12
14 | 12
14 | 12
14 | 12
14 | 12
14} 11
15 | 11
15 | 11
15} 11
15

ed
me oemst DOP OD De

_
So

t
5
5
6
6
7
7
8
8
9
9
9

15
14
14
14
14
14
14
14
14
14
14

ooo COe KF FRB EF NUN NYPD NWN WWW
— ee Oe Oe OW WO OT OC)

—
SOO F KF NUP NOWWRREEITNDAAWIHIDMWMOCo

13
13
13

Se RK EF DNDN DWHWWOHRER ER EAATMAAAMAAAAAS

OHwOHwWWNNDND NN ee ee”

WOwwnrnnrs ww wOd —& = me
PARMA AARVAAARARAAHRARAAARtMTAAAAHAT HAE HR EPPA

wWBHWwnunwnwnwnwowwrrhr RR PPE REPRE PP PP PP BP OW | OO

_
FRAT AAHAWWIWUAMADAMAHEOHWO

.
°

69%

VI. THE LENGTH OF A DEGREE OF THE

MERIDIAN AND OF THE PARALLEL.

THE formule from which the following tables have been computed are as follows :—
1 degree of the meridian = 111,132.09" — 566.05™ cos 2 » + 1.20™ cos 4 @ —

0.003™ cos 6 9, ete., in which 9 is the latitude.

cos ¢ — 94.54™ cos 3 » + 0.12™ cos 5 9, in which 9 is the middle latitude.

1 degree of the parallel = 111,415.10™
For

example, the number given for 40° in the meridian table gives the length from

59.50° to 40.30°.

The dimensions of the earth used in the formule are those of

Clarke’s spheroid of revolution of 1866, and are the same as those now (1884) used
in the U. S. Coast and Geodetic Survey? They are as follows :—

a, semi-axis major = 6,578,206.4 metres, log a = 6.80469857,
6, semi,saxis minor = 6,356,583.8 metres, log b — 6.80322378.
2 2
ee ee = 0.0067686580 log e? = 7.88050207.
a
ak = 0.003390075 log Gael = 7.53020934.
a a
log =? — 7:22991612.
ath

The numbers used in reduction to the different measures are as follows :-—

German mile
Jenatienliics UAT Sanatoris :
Nautical league = ,}, equatorial degree

French league

= ,); equatorial degree

J lee ec ; ree
Naut. or geog. mile — ;)5 equatorial degree
Statute mile

Russian werst

14

= jk equatorial degree = 7421.3802 metres, log 3.87048468

= 5566.0551 metres, log 3.74554594
4452.8281 metres, log 3.64863593
1855.3450 metres, log 3.26842469
1609.3296 metres, log 3.20664499
= 1066.781 metres, log 3.0280752

Ie) LENGTH OF ONE DEGREE OF THE MERIDIAN IN DIFFERENT MEASURES. 699

German Nautical French Nautical or Statute Russian

Degrees. Metres. ae ren eo ia. | Oe ena Miles. Wersts.
0 110567.2 | 14.898 | 19.865 24.831 59.594 68.704 | 103.646
1 110567.6 | 14.899 | 19.865 24,831 59.594 68.704 | 103.646
2 110568.6 | 14.899 | 19.865 24.831 59.595 68.705 | 103.647
3 110570.3 | 14.899 | 19.865 24.832 |. 59.596 68.706 | 103.649
4 110572.7 | 14.899 | 19.866 24.832 59.597 68.707 | 103.651
5 110575.8 14.900 | 19.866 24.833 59.598 68.709 | 103.654
6 110579.5 | 14.900 | 19.867 | 24.834 | 59.600 | 68.711 | 103.657
7 110583.9 14.901 | 19.868 24.835 59.603 68.714 | 103.661
8 110589.0 | 14.901 | 19.869 24.836 59.606 68.717 | 103.666
9 110594.7 | 14.902 | 19.870 24.837 59.609 68.721 | 103.671
10 110601.1 14.903 | 19.871 24.838 59.612 68.725 | 103.677
11 110608.1 14.904 | 19.872 24.840 59.616 68.729 103.684
12 110615.8 14.905 | 19.873 24.842 59.620 68.734 | 103.691
13 110624.1 | 14.906 | 19.875 24.844 59.625 68.739 ) 103.699
14 110633.0 | 14.907 | 19.876 24.846 59.629 68.745 | 103.707
15 110642.5 14.909 | 19.878 24.848 59.634 68.751 | 103.716
16 110652.6 | 14.910 | 19.880 24.850 59.640 68.757 | 103.726
i 110663.3 14.911 |, 19.882 24,852 59.646 68.763 | 103.736
18 110674.5 14.913 | 19.884 24.855 59.652 68.770 | 103.746
19 110686.3 | 14.914 | 19.886 24.857 59.658 68.778 | 103.757
20 110698.7 14.916 | 19.888 24.860 |" 59.665 68.786 | 103.769
21 110711.6 14.918 | 19.891 24.863 59.672 68.794 | 103.781
22 110725.0 | 14.920 | 19.893 24.806 59.679 68.802 | 103.793
23 110738.8 14.922 | 19.895 24.869 59.686 68.810 | 103.806
24 110753.2 | 14.924 | 19.898 24.872 59.694 68.819 | 103.820
25 110768.0 | 14.926 | 19.901 24.876 59.702 68.829 | 103.834
26 110783.3 | 14.928 | 19.903 24.879 59.710 68.838 | 103.848
27 110799.0 | 14.930 | 19.906 | 24.883 59.719 68.848 | 103.863
28 110815.1 14.932 | 19.909 24.886 59.727 68.858 | 103.878
29 110831.6 | 14.934 |. 19.912 | 24.890 59.736 68.868 | 103.893
30 110848.5 14.936 | 19.915 | 24.894 59.745 68.879 103.909
31 110865.7 | 14.939 | 19.918 | 24.898 59.755 68.889 | 103.925
32 110883.2 | 14.941 | 19.921 24.902 59.764 68.900 | 103.942
33 110901.1 | 14.943 | 19.925 24.906 59.774 68.911 | 103.959
34 110919.2 | 14.946 | 19.928 24.910 59.784 68.923 | 103.976
35 116937.6 | 14.948 | 19.931 24.914 59.794 68.934 | 103.993
36 110956.2 | 14.951 | 19.935 24.918 59.804 68.946 | 104.010
37 110975.0 | 14.953 | 19.938 24.922 59.814 68.957 | 104.028
38 110994.1 14.956 | 19.941 24.927 59.824 §8.969 | 104.046
39 111013.3 | 14.959 | 19.945 24.931 59.834 68.981 | 104.064
40 111032.7 | 14.961 | 19.948 24.935 59.845 68.993 | 104.082
41 111052.2 | 14.964 | 19.952 24.940 59.855 69.005 | 104.100
42 111071.7 | 14.966 | 19.955 24.944 59.866 69.017 | 104.119
43 111091.4 | 14.969 | 19.959 24.948 59.876 69.029 | 104.137
44 111111.1 | 14.972 | 19.962 24.953 59.887 69.042 | 104.156
45 111130.9 | 14.974 | 19.966 24.957 59.898 69.054 | 104.174

eT

700

1) LENGTH OF ONE DEGREE OF THE MERIDIAN IN DIFFERENT MEASURES.

| eee Nautical eee aaetical oF Statute
Degrees. | Metros. | Mita | SEs, | asi Re, | comaees™ | Miles

46 111150.7 14.977 19.969 24.962 59.908 69.067

47 111170.4 14.980 19.973 24.966 59:919 69.079

48 111190.1 14.982 19.976 24.971 59.929 69.091

49 111209.7 14.985 19.980 24.975 59.940 69.103

50 111229.3 14.988 19.984 24.979 HOLD 69.115

51 111248.7 14.990 19.987 24.984 59.961 69.127

52 111268.0 14.993 19.991 24.988 | 59.972 69.139

53 111287.1 14.995 19.994 24.992 59.982 69.151

54 111306.0 14.998 195997 24.997 59.992 69.163

55 111324.8 15.000 20.001 25.001 60.002 69.175

"EaD6 111343.3 15.003 20.004 25.005 60.012 69.186

57 111361.5 15.005 20.007 25.909 60.022 69.198

58 111379.5 15.008 20.011 25.013 60.032 69.209

59 111397.2 15.010 20.014 25.017 60.041 69.220

60 111414.5 15.013 20.017 25.021 60.051 69.230

61 111431.5 15.015 20.020 25.025 60.060 69.241

62 111448.2 15.017 20.023 25.029 60.069 69.251

63 111464.4 15.019 20.026 25.032 60.077 69.261

64 111480.3 15.022 20.029 25.036 60.086 69.271

65 111495.7 15.024 20.031 25.039 60.094 69.281

66 111510.7 15.026 20.034 25.043 60.102 69.290

67 111525.3 15.028 20.037 25.046 60.110 69.299

68 111539.3 15.029 20.039 25.049 60.118 69.308

69 111552.9 15.031 20.042 25.052 60.125 69.316

70 111565.9 15.033 20.044 25.055 60.132 69.324

71 111578.4 15.035 20.046 25.058 60.139 69.332

72 111590.4 15.036 20.048 25.061 60.145 69.340

73 111601.8 15.038 20.050 25.063 60.151 69.347

74 111612.6 15.039 20.052 25.066 60.157 69.354

75 111622.9 15.041 20.054 25.068 60.163 69.360

76 111632.6 15.042 20.056 25.070 60.168 69.366

77 111641.6 15.043 20.058 25.072 60.173 69.372

78 111650.0 15.044 20.059 25.074 60.177 69.377

79 111657.8 15.045 20.061 25.076 60.182 69.382

80 111664.9 15.046 20.063 25.077 60.186 69.386

81 111671.4 15.047 20.063 25.079 60.189 69.390

82 111677.2 15.048 20.064 25.080 60.192 69.394

83 111682.4 15.049 20.065 25.081 60.195 69.397

84 111686.9 15.049 20.066 25.082 60.197 69.400

85 111690.7 15.050 20.066 25.083 60.199 69.402

86 111693.8 15.050 20.067 25.084 60.201 69.404

87 111696.2 15.051 20.067 25.084 60.202 69.405

88 111698.0 15.051 20.068 25.084 60.203 69.407

| 89 111699.0 15.051 20.068 25.085 60.204 69.407

| 90 111699.3 15.051 20.068 25.085 60.204 69.407

rr

Russian
Wersts.

104.193

104.211
104.230
104.248
104.266

104.285
104.303
104.321
104.338
104.356

104.373
104.390
104.407
104.424
104.440

104.456
104.472
104.487
104.502
104.516

104.530
104.544
104.557
104.570
104.582

104.594
104.605
104.616
104.626
104.635

104.644
104.653
104.661
104.668
104.675

104.681
104.686
104.691
104.695
104.699
104.702
104.704
104.706
104.707
104.707

16

(ET

i Mi Baa al

2.) LENGTH OF ONE DEGREE OF THE PARALLEL IN DIFFERENT MEASURES. 4

»

01

Mieereane Metres. German | Nautical French Nautical or Statute Russian

[ > foe) | peta, tapes. op cieeg, || mee | aleret
0 111320.7 | 15.000 | 20.000 25.000 60.000 69.172 104.352
1 111303.9 | 14.998 | 19.997 24.996 59.991 69.162 104.336
2 111253.4 | 14.991 | 19.988 24.985 59.964 69.130 104.289
3 111169.2 | 14.980 | 19.973 24.966 59.918 69.078 104.210
4 111051.3 | 14.964 | 19.952 24.940 59.855 69.005 104.100
5 110899.9 | 14.943 | 19.924 24.905 59.773 68.911 103.958
6 110714.9 | 14.918 | 19.891 24.864 59.673 68.796 103.784
7 110496.5 | 14.889 | 19.852 | 24.815 59.556 68.660 103.579
8 110244.6 | 14.855 | 19.807 24.758 59.420 68.503 103.343
9 109959.3 | 14.817 | 19.755 24.694 59.266 68.326 103.076
10 109640.7 | 14.774 | 19.698 | 24.623 59.095 68.128 102.777
11 109288.9 | 14.726 | 19.635 24.544 58.905 67.909 102.447
12 108904.0 | 14.674 | 19.566 24.457 58.697 67.670 102.087
13 108486.1 | 14.618 ; 19.491 24.363 58.472 67.411 101.695
14 108035.4 | 14.557 | 19.410 24.262 58.229 67.131 101.272
15 107551.9 | 14.492 | 19.323 24.154 57.969 66.830 100.819
16 107035.8 | 14.423 | 19.230 24,038 57.690 66.510 100.335
17 106487.3 | 14.349 | 19.132 23.915 57.395 66.169 99.821
18 105906.5 | 14.270 | 19.027 23.784 57.082 65.808 99.276
19 105293.6 | 14.188 | 18.917 23.646 56.751 65.427 98.702
20 104648.7 14.101 18.801 23.502 56.404 65.026 98.098
21 103972.0 | 14.010 | 18.680 23.350 56.039 64.606 97.463
22, 103263.8 | 13.914 | 18.553 23.191 55.657 64.166 96.799
23 102524.2 |, 13.815 | 18.420 23.025 55.259 63.706 96.106
24 101753.5 | 13.711 | 18.281 22.851 54.843 63.227 95.384
25 100951.8 | 13.603 | 18.137 22.671 54.411 62.729 94.632
26 100119.5 | 13.491 | 17.988 22.485 53.963 62.212 93.852
27 99256.7 | 13.374 | 17.833 22.291 53.498 61.676 93.043
28 98363.7 | 13.254 | 17.672 22.090 53.016 61.121 92.206
99 97440.8 | 13.130 | 17.506 | 21.883 | 52.519 | 60.548 | 91.341
30 96488.2 | 13.001 | 17.335 21.669 52.006 59.956 90.448
31 95506.2 | 12.869 | 17.159 21.448 51.476 59.345 89.528

| 39 94495.1 | 12.733 | 16.977 21.221 60.931 58.717 88.580
33 93455.2 | 12.593 | 16.790 20.988 50.371 58.071 87.605
34 92386.9 | 12.449 | 16.598 20.748 49.795 57.407 86.603
35 91290.3 | 12.301 | 16.401 20.502 49.204 56.726 85.575
36 90165.8 | 12.149 16.199 20.249 48.598 56.027 84.521

37 89013.8 |. 11.994 | 15.992 19.990 AT.977 55.311 83.442
38 87834.6 | 11.835 | 15.780 19.726 47.341 54.578 82.3356
39 86628. 6 11.673 | 15.564 19.455 46.691 53.829 81.206
40 85396.1 11.507 | 15.342 19.178 | . 46.027 |. 53.063 80.050
41 84137.4 | 11.337 | 15.116 18.895 45.349 52.281 78.870
42 82853.0 | 11.164 | 14.885 18.607 44.656 51.483 77.668
43 81543.3 | 10.988 | 14.650 18.313 43.950 50.669 76.439
44 80208.5 | 10.808 14.410 18.013 43.231 49.840 75.187
45 78849.1 | 10.625 | 14.166 17.708 42.498 48.995 73.913

ee

G li

702

2.) LENGTH OF ONE DEGREE OF THE PARALLEL IN DIFFERENT MEASURES.
| | Gorman | Beaten | shaweet, | dite | unio | asin
| Degrees. Metres 15=1° Eq. | 201° Eq. | 25=1° Eq. | B16 Eq. Miles. Wersts.
| | PSE
| 46 77465.6 | 10.438 | 13.918 | 17.397 41.753 | 48.135 72.616
| 47 76058.3 | 10.249 | 13.665 | 17.081 40.994 | 47.261 71.297
| 48 74627.7 | 10.056 | 13.408 | 16.760 40.223 | 46.372 69.956
|| 49 73174.1 | 9.860 | 13.147 | 16.433 39.440 | 45.469 68.593
| 50 71698.1 | 9.661 | 12.881 | 16.102 38.644 | 44.552 67.210
Hl) De 70200.0 | 9.459 | 12.612 | 15.765 37.837 | 43.621 65.805
Neier 68680.3 | 9.254 | 12.339 | 15.424 37.018 | 42.676 64.381
oneness 67139.5 | 9.047 | 12.062 | 15.078 36.187 | 41.719 62.937
|| 54 65578.1. | 8.836 | 11.782 | 14.727 35.346 | 40.749 61.473
55 63996.4 | 8.623 | 11.498 | 14.372 34.493 | 39.766 59.990
56 62395.0 | 8.407 | 11.210 | 14.013 33.630 | 38.771 58.489
57 60774.4 | 8.189 | 10.919 | 13.649 32.757 | 37.764 56.970
58 59135.1 | 7.968 | 10.624 | 13.280 31.873 | 36.745 55.433
59 57477.5 | 7.745 | 10.326 | 12.908 30.979 | 35.715 53.879
60 55802.2 | 7.519 | 10.025 | 12.532 30.076 | 34.674 52.309
61 54109.6 | 7.291 9.721 || 12.152 29.164 | 33.622 50.722
62 52400.3 | 7.061 9.414 | 11.768 28.243 | 32.560 | 49.120
63 50674.9 | 6.828 9.104 | 11.380 27.313 | 31.488 | 47.503
64 48933.7 | 6.594 8.791 | 10.989 26.374 | 30.406 | 45.870
65 AT177.5 | 6.357 | 8.476 | 10.595 25.428 | 29.315 44,224
| 66 45406.6 | 6.118 | 8.158 | 10.197 94.473 | 28.215 42.564
67 43621.7 | 5.878 7.837 9.796 93.511 27.106 40.891
68 41823.3 | 5.636 7.514 9.392 92.542 | 25.988 39.205
69 40012.0 | 5.391 7.189 8.986 21.566 | 24.862 | 37.507
le 70 38188.2 | 5.146 6.861 8.576 20.583 | 23.729 35.758
71 36352.6 | 4.898 6.531 | 8.164 19.593 | 22.589 34.077
72 34505.8 | 4.649 6.199 7.749 18.598 | 21.441 32.346
73 32648.2° | 4.399 5.866 7.332 17.597 | 20.287 30.604
74 30780.5 | 4.148 5.530 6.913 16.590 | 19.126 28.854
75 28903.3 | 3.895 5.193 6.491 15.578 | 17.960 27.094
76 27017:1 | 3.640 | 4.854 6.067 14.562 | 16.788 | 25.326
77 25122.5 | 3.385 4.514 | 5.642 13.541 | 15.611 23.550
78 o3000.2 | 3.199 | 4.172 5.215 12.515 | 14.428 | 21.767
79 21310.6 | 2,872 3.829 4.786 11.486 | 13.242 19.977
ease 19394.4 | 2.613 3.484 | 4.356 10.453 | 12.051 18.180
Paes ssi 17472.2 | 2.354 | 3.139 || 3.924 9.417 | 10.857 16.378
| 82 15544.5 | 2.095 2.793 | 3.491 8.378 9.659 14.571
Hl age 13612.0 | 1.834 | 2.446 | 3.057 7.337 8.458 | 12.760
Hl nae 11675.3 ‘| 1.573 | 2.098 2.622 6.293 7.255 10.944
|} 85 9735.0 | 1.312 1.749 2.186 5.247 6.049 9.126
He 86 7791.6 | 1.050 | 1.400 1.750 4,200 4.841 | ~ 7.304
bese 5845.8 | 0.788 | 1.050 1.313 3.151 3.632 5.480
Ko eane8 3898.2 | 0.525 | 0.700 | 0.875 2.101 2.422 3.654
| 89 1949.4 0.263 0.350 | - 0.438 1.051 1.211 1.827
BG 0. 0. her: 0. 0. 0. 0.
| |
Ga 18

i

703
VII. TABLES FOR COMPUTING TERRESTRIAL SURFACES.

THEsE tables replace a similar set in the earlier edition, which were published
first by Deleros in the Annuaire Météorologique de la France pour 1850, p. 68 et
seg. In the following tables the dimensions assumed for the earth are those of
Clarke’s spheroid of revolution of 1866 (see table, p. G 14 et sec.)

The formula from which the tables have been computed reads as follows :—

sin 4 @ cos (L+ 3} 9)
a—hb a—b\27 . : A
seen = (°2( Ga) + (ae) Jen Biivs WoL eon

vO Siig :

| + s[ 8a) (5) | (2+ 46) cos [5L + (20+ 49)]
2 a a

——OECs 5

in which a and 6 are the semi-axes, L and L/ the latitudes of the upper and lower
limits of the quadrilateral surface respectively, p= L’—L. Substituting numerical

values, we have for surface of one degree
224.996175 cos ( L+ 0° 30’)
geet — 0.764620 cos (3 L + 1° 30’)
+ 0.001946 cos (5 L + 2° 80)
5 + ete.
As in the tables in the earlier edition the numbers are given in square miles the
linear base of which is a mile equal to ,: of the mean degree of the meridian.
; ahs 10001888.2
That mile is thus —7 5 = 7408.806 metres, log. 3.86974822. In order to
convert these results into geographical miles, 601° equator, multiply by 15.945827,
log. 1.20264706; into French leagues, 25 = 1° equator, multiply by 2.768371, log.
0.44222458; into nautical leagues, 201° equator, multiply by 1.771759, log.
0.24840456; into German miles, 151° equator, multiply by 0.996614, log.
9.99852708 ; into English statute miles, multiply by 21.193684, log. 1.32620646.

UsE OF THE TABLES.

Table I., which gives the number of square miles contained in the quadrilateral
surfaces of one degree in latitude and longitude, successively from the equator to the
pole, will be more frequently used. Table II. has been computed for maps on a
smaller scale; and Tables III. and IV. for maps of very small scale, covering large
areas, in which surfaces of one degree could not be estimated with sufficient accuracy.
If the scale is large enough to have the minutes traced on, then Table V. is to be used.
For computing a surface by Table I., which may serve as an example for all the
others, find first the lowest parallel circle which crosses, on the map, the surface to
be estimated ; suppose it is 40° lat. N., and the zone within 409 and 41° lat. N.
contains four integral degrees of longitude, that is, four surfaces of one degree each
way; then in the first column of the table, on the line beginning with latitude 40°,
and in the vertical column headed 4, take the value of these four surfaces, viz.
685.94. Then take likewise the value of the number of surfaces between 41° and
42° Jat. N., and so on. The fractional parts left outside of the integral degrees are
best estimated, with the compass, in decimals, the values of which can be found in
the columns of the multiples, by properly moving the decimal point to the left.
Having taken them in that way, and summing them up with all the integral sur-
faces, we obtain the total surface required.

G 19

704
TABLE 1,) QUADRILATERAL SurFAcES OF 1 DEGREE IN LATITUDE AND IN
LONGITUDE ON THE ‘TERRESTRIAL ELLIPsuID.

Limiting Multiples of these Quadrilateral Surfaces from 1 to 9.
Latitudes.
Inf. | Sup. 1. 2. Be zm dD. 6. W. Ss. 9.
0| 1 || 224.225} 448.45 | 672,68 | 896.90 J1121.13 | 1345.35] 1569.58] 1793.80] 2018.03)
1| 2 || 224.159} 448.32 | 672.48 | 896.63 [1120.79 | 1344.95} 1569.11] 1793.27] 2017.43)
2| 3 || 224.026] 448.05 | 672.08 | 896.10 [1120.13 | 1344.15] 1568.18] 1792.21) 2016.23
3| 4 || 223.827] 447.65 | 671.48 | 895.31 [1119.13 | 1342.96] 1566.79] 1790.61] 2014.44
4| 5 |) 223.561) 447.12 | 670.68 | 894.24 1117.80 | 1341.36) 1564.93} 1788.49] 2012.05)|
5 | 6 || 223.229] 446.46 | 669.69 | 892.92 1116.14 | 1339.37] 1562.60] 1785.83] 2009.06)
6 | 7 || 222.831) 445.66 | 668.49 | 891.32 [1114.15 | 1336.98] 1559.81] 1782.64| 2005.48]|
7 | 8 || 222.366) 444.73 | 667.10 | 889.47 1111.83 | 1334.20] 1556.56) 1778.93} 2001.30)|
8 | 9 || 221.836] 443.67 | 665.51 | 887.34 [1109.18 | 1331.02] 1552.85) 1774.69| 1996.52/|
9 | 10 || 221.240] 442.48 | 663.72 | 884.96 [1106.20 | 1327.44] 1548.68] 1769.92} 1991.16
' 40 | 11 | 220.5781 441.16 | 661.73 | $82.31 [1102.89 | 1323.47] 1544.04] 1764.62) 1985.20)
11 | 12 | 219.850} 439.70 | 659.55 | 879.40 [1099.25 | 1319.10) 1538.95] 1758.80] 1978.65
| 12 | 13 || 219.057} 438.11 | 657.17 | 876.23 1095.29 | 1314.34) 1533.40] 1752.46] 1971.51]|
| 13 14 || 218.199) 436.40 | 654.60 | 872.80 [1090.99 | 1309.19) 1527.39) 1745.59 1963.79)
14| 15 || 217.275] 434.55 |.651.83 | 869.10 [1086.38 | 1203.65] 1520.93] 1738.20) 1955.48),
| 15 | 16 || 216.287] 432.57 | 648.86 | 865.15 [1081.44 | 1297.72| 1514.01) 1730.30] 1946.58)|
16 | 17 || 215.234] 430.47 | 645.70 | 860.94 1076.17 | 1291.41) 1506.64) 1721.88] 1937.11]|
17. | 18 || 214.117] 428.23 | 642.35 | 856.47 [1070.59 | 1284.70] 1498.82} 1712.94] 1927.06||
18 | 19 || 212.936) 425.87 | 638.81 | 851.74 [1064.68 | 1277.62} 1490.55] 1703.49] 1916.42!|
19 | 20 | 211.691} 423.38 | 635.07 | 846.76 ]1058.45 | 1270.15) 1481.84] 1693.53) 1905.22)
20 | 21 | 210.382) 420.76 | 631.15 | 41.53 [1051.91 | 1262.29] 1472.68) 1683.06] 1893.44||
| 91-| 22 || 209.01j| 418.02 | 627.03 | 836.04 ]1045.05 | 1254.06] 1463.07] 1672.98) 1881.10)
99,| 23 || 207.576! 415.15 | 622.73 | 830.30 [1037.88 | 1245.46] 1453.03] 1660.61] 1868.18]
| 23 | 24 || 206.079] 412.16 | 618.24 | 824.32 [1030.39 | 1236.47| 1442.55] 1648.63] 1854.71
94 | 25 || 204.519| 409.04 | 613.56 | 818.08 }1022.60 | 1227.12} 1431.64] 1636.16] 1840.67
| 95 | 26 || 202.898] 405.80 | 608.70 | 811.59 [1014.49 | 1217.39] 1420.29) 1623.19] 1826.09)
| 96 | 27 || 201.216] 402.43 | 603.65 | 804.86 [1006.08 | 1207.30) 1408.51) 1609.73] 1810.95),
27 | 28 || 199.473] 398.95 | 598.42 | 797.89 | 997.36 | 1196.84} 1396.31] 1595.78] 1795.26)
28 | 29 || 197.669 395.34 | 593.01 | 790.68 | 988.34 | 1186.01) 1383.68) 1581.35) 1779.02)
29 | 30 || 195.805] 391.61 | 587.42 | 783.22 | 979.03 | 1174.83] 1370.64] 1566.44, 1762.25)|
| 30 | 31 || 193.882] 387.76 | 581.64 | 775.53 | 969.41 | 1163.29) 1357.17] 1551.05). 1744.93)
31 | 32 || 191.899] 383.80 | 575.70 | 767.60 | 959.49 | 1151.39] 1343.29] 1535.19] 1727.09)|
39, | 33 | 189.8581 379.72 | 569.57 | 759.43 | 949.29 | 1139.15) 1329.00] 1518.86] 1708.72)
33 | 34 || 187.759] 375.52 | 563.28 | 751.03 | 938.79 | 1126.55} 1314.31) 1502.07] 1689.83)
34 | 35 || 185.602] 371.20 | 556.81 | 742.41 | 928.01 | 1113.61) 1299.21] 1484,82| 1670.42
35 | 36 || 183.388] 366.78 | 550.16 | 733.55 7 916.94 | 1100.33] 1283.72] 1467.11) 1650.49
36 | 37 || 181.118) 362.24 | 543.35 | 724.47 | 905.59 | 1086.71) 1267.83] 1448.94) 1630.06)
37 | 38 || 178.792) 357.58 | 536.38 | 715.17 | 893.96 | 1072.75] 1251.55] 1430.34} 1609.13
38 | 39 || 176.411) 352.82 | 529.23 | 705.64 | 882.06 | 1058.47] 1234 88] 1411.29] 1587.70||
39 | 40 || 173.976] 347.95 | 521.93 | 695.90 | 869.88 | 1043.85] 1217.83] 1391.80] 1565.78
40 | 41 || 171.486] 342.97 | 514.46 | 685.94 | 857.43 | 1028.92] 1200.40] 1371.89] 1543.37
|| 41 | 42 || 168.943) 337.89 | 506.83 | 675.77 | 844.72 | 1013.66] 1182.60] 1351.55) 1520.49)
|| 42 | 43 || 166.348) 332.70 | 499.05 | 665.39 | 831.74 | 998.09] 1164.44) 1330.79] 1497.14!
| 43 | 44 || 163.701] 327.40 | 491.10 | 654.81 | 818.51 | 982.21) 1145.91] 1309.61] 1473.31,
|| 44 | 45 |] 161.003] 322.01 | 483.01 | 644.01 | 805.02 | 966.02] 1127.02] 1288.03] 1449.03
eid aay

705
TABLEL.) (Concluded) QUADRILATERAL SURFACES OF 1 DEGREE IN LATITUDE
AND IN LONGITUDE ON THE TERRESTRIAL ELLIpsoip.

Limiting Multiples of these Quadrilateral Surfaces from 1 to 9.
Latitudes,
Inf. Sup. i. ae oe 4. d- 6. 7. 8. 9.

45 | 46 |/158.255 | 316.51 | 474.77 | 633.02 | 791.28 | 949.53 |1107.79 |1266.04 |1424.30
46 | 47 |155.457 | 310.91 | 466.37 | 621.83 | 777.29 | 932.74 |1088.20 |1243.66 |1399.12
AT | 48 |/152.611 | 305.22 | 457.83 | 610.44 | 763.05 | 915.66 |1068.27 |1220.89 |1373.50
48 | 49 ||149.716 | 299.43 | 449.15 | 598.86 | 748.58 | 898.30 |1048.01 |1197.73 |1347.45
49 | 50 ||146.775 | 293.55 | 440.32 | 587.10 | 733.87 | 880.65 [1027.42 |1174.20 |1320.97

50 | 51 143.787 | 287.57 | 431.36 | 575.15 | 718.93 | 862.72 |1006.51 |1150.29 |1294.08
51 | 52 140.753 | 281.51 | 422.26 | 563.01 | 703.77 | 844.52 | 985.27 |1126.02 |1266.78 |
52 | 53 1137.675 | 275.35 | 413.03 | 550.70 | 688.38 | 826.05 | 963.73 \1101.40 [1239.08 |
53 | 54 |134.554 | 269.11 | 403.66 | 538.21 | 672.77 | 807.32 | 941.88 |1076.43 [1210.98
54 | 55 ||131.389 | 262.78 | 394.17 | 525.56 | 656.95 | 788.33 | 919.72 [1051.11 {1182.50

55 | 56 (128.183 | 256.37 | 384.55 | 512.73 | 640.91 | 769.10 | 897.28 |1025.46 [1153.65 |
56 | 57 ||124.936 | 249.87 | 374.81 | 499.74 | 624.68 | 749.62 | 874.55 | 999.49 )1124.42
i| 57 | 58 (121.649 | 243.30 | 364.95 | 486.60 | 608.24 | 729.89 | 851.54 | 973.19 |1094.84
58 | 59 118.323 | 236.65 | 354.97 | 473.29 | 591.62 | 709.94 | 828.26 | 946.59 |1064.91
| 59 | 60 |/114.959 | 229.92 | 344.88 | 459.84 | 574.80 | 689.76 | 804.72 | 919.68 {1034.63

60 | 61 111.559 | 223.12 | 334.68 | 446.24 | 557.79 | 669.35 | 780.91 | 892.47 {1004.03
61 | 62 ||108.122 | 216.24 | 324.37 | 432.49 | 540.61 | 648.73 | 756.86 | 864.98 | 973.10 |
62 | 63 104.651 | 209.30 | 313.95 | 418.60 | 523.26 | 627.91 | 732.56 | 837.21 | 941.86 |
63 | 64 |101.146 | 202.29 | 303.44 | 404.58 | 505.73 | 606.88 | 708.02 | 809.17 | 910.31 |
64 | 65 || 97.608 | 195.22 | 292.83 | 390.43 | 488.04 | 585.65 | 683.26 | 780.87 | 878.48
65 | 66 || 94.039 | 188.08 | 282.12 | 376.16 | 470.20 | 564.23 | 658.27 | 752.31 | 846.35
66 | 67 || 90.440 | 180.88 | 271.32 | 361.76 | 452.20 | 542.64 | 633.08 | 723.52 | 813.96
67 | 68 | 86.811 | 173.62 | 260.43 | 347.24 | 434.05 | 520.86 | 607.67 | 694.48 | 781.30
68 | 69 || 83.153 | 166.31 | 249.46 | 332.61 ] 415.77 | 498.92 | 582.07 | 665.23 | .748.38
69 | 70 || 79.469 | 158.94 | 238.41 | 317.88 | 397.35 | 476.82 | 556.28 | 635.75 | 715.22

70 | 71 || 75.759 | 151.52 | 227.28 | 303.04 | 378.80 | 454.56 | 530.31 | 606.07 | 681.83 ||
71 | 72 || 72.024 | 144.05 | 216.07 | 288.10 | 360.12 | 432.15 | 504.17 | 576.19 | 648.22
72 | 73 || 68.266 | 136.53 | 204.80 | 273.06 | 341.33 | 409.60 | 477.86 | 546.13 | 614.40
73 | TA || 64.486 | 128.97 | 193.46 | 257.94 | 322.43 | 386.91 | 451.40 | 515.89 | 580.37
74 | 75 || 60.684 | 121.37 | 182.05 | 242.74 | 303.42 | 364.10 | 424.79 | 485.47 | 546.16

75 | 76 || 56.863 | 113.73 | 170.59 | 227.45 | 284.31 | 341.18 | 398.04 | 454.90 | 511.76
76 | 77 || 53.023 | 106.05 | 159.07 | 212.09 | 265.11 | 318.14 | 371.16 | 424.18 | 477.20
77 | 78 || 49.165 | 98.33 | 147.50 | 196.66 | 245.83 | 294.99 | 344.16 | 393.32 | 442.49
78 | 79 || 45.292 | 90.58 | 135.88 | 181.17 | 226.46 | 271.75 | 317.04 | 362.33 | 407.63
79 | 80 || 41.403 ; 82.81 | 124.21 | 165.61 | 207.02 | 248.42 | 289.82 | 331.23 | 372.63

80 | 81 || 37.501 | 75.00 | 112.50 | 150.01 | 187.51 | 225.01 | 262.51 | 300.01 | 337.51
81 | 82 || 33.587 | 67.17 | 100.76 | 134.35 | 167.94 | 201.52 | 235.11 | 268.70 | 302.28
82 | 83 || 29.662 , 59.32 | 88.99 | 118.65 | 148.31 | 177.97 | 207.63 | 237.29 | 266.95
83 | 84 || 25.727 | 51.45 | 77.18 | 102.91 | 128.63 | 154.36 | 180.09 | 205.81 | 231.54
84 | 85 || 21.783 | 43.57 | 65.35 | 87.13 | 108.91 | 130.70 | 152.48 | 174.26 | 196.05

85 | 86 || 17.832 | 35.66 | 53.50 | 71.33 | 89.16 | 106.99 | 124.83 | 142.66 | 160.49
86 | 87 || 13.876 | 27.75 | 41.63 | 55.50% 69.38 | 83.25 | 97.13 | 111.00 | 124.88
87 | 88 9.914 | 19.83 | 29.74 | 39:66 | 49.57 | 59.49 | 69.40] 79.32] 89.23
88 | 89 5.950 | 11.90 | 17.85 | 23.80 7 29.75 | 35.70 | 41.65 | 47.60] 53.55
89 | 90 1.984 3.97 5.95 7.93 9.92} 11-90) |) 13.89) |) 15:87) \ 17.85

G 5 a1

706

TABLE 2.) QUADRILATERAL SURFACES OF 2 DEGREES IN LATITUDE AND IN |
LONGILUDE ON THE TERRESTRIAL ELLibsvlb.
Limiting Multiples of these Quadrilateral Surfaces from 1 to 9.
Latitudes.
Inf. |Sup. 1. oer de D. 6. eo 8. 5 |
0 2, || 896.768] 1793.54] 2690.30 4483.84) 5380.61| 6277.37) 7174.14) 8070.91
2 4 || 895.705} 1791.41) 2687.11 4478.52| 5374.23) 6269.93] 7165.64| 8061.34
4 6 || 893.579] 1787.16} 2680.74 4467.90) 5361.48) 6255.06) 7148.64) 8042.21
6 8 || 890.394) 1780.79) 2671.18 § 4451.97) 5342.36) 6232.76] 7123.15) 8013.55
8 | 10 || 886.152) 1772.30) 2658.46 4430.76] 5316.91) 6203.06) 7089.21) 7975.37
10 | 12 || 880.856} 1761.71) 2642.57 4404.28] 5285.14) 6165.99} 7046.85) 7927.71
12 | 14 || 874.512 1749.02 2623.54 4372.56] 5247.07) 6121.58) 6996.09] 7870.61
14 | 16 || 867.125) 1734.25) 2601.38 4335.63) 5202.75) 6069.88) 6937.00) 7804.13
16 | 18 || 858.703) 1717.41) 2576.11 4293.52) 5152.22) 6010.92) 6869.63) 7728.33
18 | 20 || 849.254) 1698.51) 2547.76 4246.27) 5095.52) 5944.78) 6794.03) 7643.28
20 | 22 || 838.786) 1677.57) 2516.36 4193.93] 5032.72) 5871.50) 6710.29) 7549.07
22, | 24 || 827.310) 1654.62) 2481.93 4136.55} 4963.86] 5791.17) 6618.48] 7445.79
24 | 26 || 814.836) 1629.67) 2444.51 4074.18] 4889.01) 5703.85} 6518.68) 7333.52
26 | 28 || 801.378] 1602.76) 2404.13 4006.89] 4808.27) 5609.65|) 6411.02) 7212.40
98 | 30 || 786.948) 1573.90] 2360.84} 3147.79} 3934.74] 4721.69) 5508.64] 6295.59) 7082.53
30 | 32 || 771.561) 1543.12} 2314.68] 3086.24} 3857.81] 4629.37] 5400.93) 6172.49) 6944.05
32 | 34 || 755.233) 1510.47] 2265.70) 3020.93] 3776.16] 4531.40} 5286.63) 6041.86) 6797.09
34 | 36 || 737.980] 1475.96] 2213.94) 2951.92) 3689.90} 4427.88] 5165.86] 5903.84) 6641.82
36 | 38 || 719.820] 1439.64] 2159.46] 2879.28] 3599.10) 4318.92) 5038.74| 5758.56] 6478.38
38 | 40 || 700.773) 1401.55) 2102.32} 2803.09} 3503.87] 4204.64} 4905.41) 5606.19) 6306.96
40 | 42 || 680.859) 1361.72} 2042.58] 2723. 3404.30] 4085.15} 4766.01) 5446.87) 6127.73
42, | 44 || 660.100) 1320.20} 1980.30] 2640.40] 3300.50) 3960.60} 4620.70) 5280.80) 5940.90
44 | 46 || 638.517| 1277.03] 1915.55) 2554.07] 3192.59) 3831.10) 4469.62) 5108.14) 5746.65
46 | 48 || 616.136] 1232.27] 1848.41] 2464.54] 3080.68] 3696.82} 4312.95) 4929.09) 5545.22
48 | 50 || 592.982] 1185.96) 1778.94} 2371.93] 2964.91] 3557.89} 4150.87] 4743.85) 5336.83
50 | 52 || 569.079] 1138.16] 1707.24) 2276.32) 2845.40} 3414.48] 3983.56) 4552.64) 5121.71
52 | 54 || 544.457/ 1088.91) 1633.37) 2177.83] 2722.29] 3266.74) 3811.20) 4355.66) 4900.12
54 | 56 || 519.144} 1038.29] 1557.43} 2076.58] 2595.72) 3114.87] 3634.01] 4153.15} 4672.30
56 | 58 || 493.170] 986.34) 1479.51} 1972.68] 2465.85} 2959.02) 3452.19) 3945.36) 4438.53
58 | 60 || 466.565} 933.13} 1399.70} 1866.26] 2332.83] 2799.39) 3265.96) 3732.52) 4199.09
60 | 62 || 439.363] 878.73) 1318.09] 1757.45] 2196.81] 2636.18] 3075.54) 3514.90) 3954.26
62 | 64 || 411.594) 823.19] 1234.78) 1646.38] 2057.97) 2469.57) 2881.16) 3292.75] 3704.35
64 | 66 || 383.295} 766.59} 1149.88] 1533.18] 1916.47] 2299.77) 2683.06) 3066.36] 3449.65
66 | 68 || 354.500] 709.00] 1063.50) 1418.00} 1772.50) 2127.00) 2481.50; 2836.00} 3190.50
68 | 70 || 325.245) 650.49} 975.74) 1300.98) 1626.23} 1951.47) 2276.72) 2601.96) 2927.21
70 | 72. || 295.567| 591.13} 886.70} 1182.27] 1477.83] 1773.40] 2068.97) 2364.54) 2660.10
72.1 74 || 265.504) 531.01) 796.51) 1062.02) 1327.52) 1593.02) 1858.53} 2124.03) 2389.53
74. | 76 || 235.094) 470.19) (705.28) 940.37] 1175.47} 1410.56} 1645.66) 1880.75) 2115.84)
76 | 78 || 204.376} 408.75) 613.13} 817.50] 1021.88} 1226.26) 1430.63] 1635.01) 1839.38
78 | 80 || 173.390! 346.78) 520.17) 693. 866.95] 1040.34) 1213.73) 1887.12) 1560.51
|| 80 | 82 || 142.177| 284.35} 426.53) 568.71] 710.88} 853.06] 995.24) 1137.41] 1279.59
| 82 | 84 || 110.777) 221.55) 332.33) 443.11) 553.88] 664.66) 775.44) 886.21) 996.99
84 | 86 79.230| 158.46] 237.69] 316.92] 396.15) 475.38] 554.61) 633.84) 713.07
86 | 88 47.580 95.16) 142.74; 190.3 237.90] 285.48] 333.06) 380.64) 428.22
88 | 90 15.867 Sleie 47.60 63.47 79.34 95.20) 111.07) 126.94) 142.80

_

TABLE 3.)

Limiting
Latitudes.

Inf. | Sup.

1.

707
QUADRILATERAL SURFACES OF 5 DEGREES IN LATITUDE AND IN
LONGITUDE UN THE ‘TERRESTRIAL ELLIPSOID.

Multiples of these Quadrilateral Surfaces from 1 to 9.

Ze oe

5598.985
5557.509
5474. 797
5351.329
5187.838

4985.307
4744.993
4468.425
4157.414
3814.070

3440.788
3040.252
2615.434
2169.559
1706.098

1228.729
741.295
247.779

LOE
11115.02
10949 .59
1
10375. 68

16796.96
16672.53
16424. 39
16053.99
15563. 51

0702. 66)

9970. 61
9489.99
8936.85
8314. 83
"7628.14

14955.92
14234. 98
13405 .27
12472. 24
11442. 21

6881.58
6080.50
5230.87
4339.12)
3412.20

10322. 36
9420.76
7846.30
6508.68
5118.29

2457.46
1482.60

3686.19
2223.89

495.56} 743.34

4.

22395.94
22230.04
21899.19
21405.32
20751.35

19941.23
18979.97
17873.70
16629.66
15256.28

13763.15
12161.01
10461.74
8678.24
6824.39

4914.92)
2965.19
991.12

27994.93
27787.55
27373.98
26756.65
25939.19

24926.54
23724.96
22342.13
20787.07
19070.36

17203.94
15201.26
13077.17
10847.79

8530.49

6143.65
3706.49

1238.90

6.

39593.91
33345.06
32848.78
32107.98
31127.02

29911.85
28469.96
26810.55
24944.49
22884.42

20644.73
18241.51
15692.60
13017.35
10236.59

7372.37
4447.79
1486.67

7.

39192.90
38902.57
38323.58
37459.30
36314. 86

34897.15
33214.95
31278.97
29101.90
26698.49

24085.51
21281.78
18308.04
15186.91
11942.69

8601.10
5189.09
1734.45

8.

44791.88
44460.07
43798.38
42810.63
41502.70

39882.46
37959.94
35747.40
33259.31
30512.56

27526.30
24322.02
20923.47
17356.47
13648.78

9829.83
5930.38
1982.23

9.

50390.87
50017.58
49273.17
48161.96
46690.54

44867.77
42704.94
40215.82
37416.73
34326.63

30967.09
27362.27
23538.91
19526.03
15354.88

11058.56
6671.68
2230.01

TABLE 4.)

Limiting
Latitudes.

QUADRILATERAL SURFACES OF 10 DEGREES IN LATITUDE AND IN
LONGITUDE ON THE TERRESTRIAL ELLIPSOID.

Multiples of these Quadrilateral Surfaces from 1 to 9.

Inf. | Sup.

10
20
30

10
| 20

40
50
60

70
80
90

| 30
40
50

'20346.290,

1.

|
22312.992
21 652.254

18426.836
15942.971

12962.081
9569.984

2. 3.

A.

dD.

6.

4%.

8.

9.

40692.58

36853. 67
31885.94
25924.16

'19139.97

55280.51173707.34
47828.91/63771.88
38886.24/51848.32

28709.95|38279.94

5869.655 11739.31)17608.96|23478. 62
5934.46] 7912.62

1978.154

| 3956.31

44625.98|66938.96189251.97)111564.96)133877.95
43304.51/64956.76/86609.021108261.27|129913.53

92134.18/110561.02)128987.85

79714.86
64810.40

47849 .92
29348.27
9890.77

61038.87|81385.16}101731.45)122077.74 142424.03

95657.83)
77772.48

57419.90
35217.93
11868.93

156190.95
151565.78

111600.80,
90734.57

| 66989.89
41087.58
13847.08

178503.94
173218.04
162770.32

147414.69
127543.77
103696.65

76559.87

46957.24
15825.23

200816.93
194870.29
183116.61

165841.52
143486.74
116658.73

86129.86
52826.89
17803.39

708
TABLE 5.) MEAN QUADRILATERAL SURFACES OF 1, 10, 20, AND 30 MINUTES
IN LATITUDE AND IN LONGITUDE DEDUCED FROM EACH QUADRILATERAL OF
1 DEGREE IN 'l'ABLE 1.)

Limiting Mean Surfaces measuring in Latitude Limiting Mean Surfaces measuring in Latitude .
Latitudes, and in Longitude. Latitudes. and in Longitude.
Inf. | Sup.) WW’. 10’. | 20’. | 80% | Inf. | Sup.| a’, 10’. | 20’. | 30’.
0 1 || 0.0623) 6.228 | 24.914 | £6.056 45 | 46 || 0.0440) 4.396 | 17.584 | 39.564
1 2 || 0.0623) 6.227 | 24.907 | 56.040 46 | 47 || 0.0432) 4.318 | 17.273 | 38.864
2 3 || 0.0622] 6.223 | 24.892 | 56.006 | 47 | 48 || 0.0424) 4.239 | 16.957 | 38.153
3 | 4 || 0.0622| 6.217 | 24.87) | 55.957 48 | 49 || 0.0416) 4.159 | 16.635 | 37.429
4 5 || 0.0621) 6.210 | 24.84 | 55.890 | 49 | 50 || 0.0408) 4.077 | 16.308 | 36.694
5 6 || 0.0620) 6.201 | 24.803 | 55.807 50 | 51 || 0.0399| 3.994 | 15.976 | 35.947
6 7 || 0.0619] 6.190 | 24.759 | 55.708 51 |°52 || 0.0391) 3.910 | 15.639 | 35.188
"a 8 || 0.0618} 6.177 | 24.707 | 55.592 52 | 53 || 0.0382) 3.824 | 15.297 | 34.419
8 9 || 0.0616] 6.162 | 24.648 | 55.459 53 | 54 || 0.0374] 3.738 | 14.950 | 33.638
9 | 10 || 0.0615} 6.146 | 24.582 | 55.310 54 | 55 || 0.0365] 3.650 | 14.599 | 32.847
10 | 11 || 0.0613] 6.127 | 24.509 | 55.144 55 | 56 || 0.0356] 3.561 | 14.242 | 32.046
11 | 12 || 0.0611] 6.107 | 24.428 | 54.963 56 | 57 || 0.0347) 3.470 | 13.882 | 31.234
| 12 | 13 || 0.0608] 6.085 | 24.339 | 54.764 57 | 58 || 0.0338] 3.379 | 13.516 | 30.412
13 | 14 || 0.0606) 6.061 | 24.244 | 54.550 58 | 59 || 0.0329) 3.287 | 13.147 | 29.581
14 | 15 |} 0.0604) 6.035 | 24.142 | 54.319 59 | 60 || 0.0319} 3.193 | 12.773 | 28.740
15 | 16 || 0.0601} 6.008 | 24.032 | 54.072 60 | 61 || 0.0310} 3.099 | 12.396 | 27.890
16 | 17 || 0.0598) 5.979 | 23.915 | 53.809 61 | 62 || 0.0300} 3.003 | 12.014 | 27.031
17 | 18 || 0.0595} 5.948 | 23.791 | 53.529 62 | 63 || 0.0291] 2.907 | 11.628 | 26.163

| 18] 19 || 0.0591] 5.915 | 23.660 | 53.234 | 63 | 64 || 0.0281) 2.810 | 11.238 | 25.287
19 | 20 || 0.0588] 5.880 | 23.521 | 52.923 | 64 | 65 || 0.0271) 2.711 | 10.845 | 24.402 4
20 | 21 || 0.0584] 5.844 | 23.376 | 52.596 | 65 | 66 || 0.0261] 2.612 | 10.449 | 23.510 |
21 | 22 || 0.0581) 5.806 | 23.223 | 52.253 | 66 | 67 || 0.0251) 2.512 | 10.049 | 22.610
22 | 23 || 0.0577] 5.766 | 23.064 | 51.894 | 67 | 68 || 0.0241] 2.411 | 9.646 | 21.703 ;

23 | 24 || 0.0572] 5.724 | 22.898 | 51.520 | 68 | 69 || 0.0231] 2.310 | 9.239 | 20.788
24 | 25 || 0.0568] 5.681 | 22.724 | 51.130 | 69 | 70 || 0.0221] 2.207 | 8.830 | 19.867

25 | 26 || 0.0564| 5.636 | 22.544 | 50.725 | 70 | 71 || 0.0210] 2.104 | 8.418 | 18.940 .
| 96 | 27 || 0.0559] 5.589 | 22.357 | 50.304] 71 | 72 || 0.0200] 2.001 | 8.003 | 18.006 |
27 | 28 || 0.0554] 5.541 | 22.164 | 49.868 | 72 | 73 || 0.0190] 1.896 | 7.585 | 17.067
28 | 29 || 0.0549] 5.491 | 21.963 | 49.417 | 73 | 74 || 0.0179] 1.791 | 7.165 | 16.121

29 | 30 || 0.0544) 5.439 | 21.756 | 48.951 | 74 | 75 || 0.0169] 1.686 | 6.743 | 15.171

30 | 31 || 0.0539] 5.386 | 21.542 | 48.470 | 75 | 76 |) 0.0158) 1.580 | 6.318 | 14.216
31 | 32 || 0.0533} 5.331 | 21.322 | 47.975 | 76 | 77 || 0.0147] 1.473 | 5.892 | 13.256
32 | 33 || 0.0527) 5.274 | 21.095 | 47.464 | 77 | 78 || 0.0137] 1.366 | 5.463 | 12.291
| 33 | 34 || 0.0522} 5.216 | 20.862 | 46.940 | 78 | 79 || 0.0126) 1.258 | 5.032 | 11.323
34 | 35 || 0.0516] 5.156 | 20.622 | 46.400 | 79 | 80 | 0.0115) 1.150 | 4.600 | 10.351

| 85 | 36 || 0.0509) 5.094 | 20.376 | 45.847 | 80 | 81 || 0.0104; 1.042 | 4.167 | 9.375
| 36 | 37 || 0.0503) 5.031 | 20.124 | 45.280 | 81 | 82 || 0.0093) 0.933 | 3.73 8.397
37 | 38 || 0.0497| 4.966 | 19.866 | 44.698 | 82 | 83 | 0.0082] 0.824 | 3.296 | 7.415
38 | 39 || 0.0490] 4.900 | 19.600 | 44.103 | 83 | 84 || 0.0071) 0.715 | 2.858 | 6.432
39 | 40 || 0.0483} 4.833 | 19.331 | 43.494 | 84 | 85 || 0.0061) 0.605 | 2.420) 5.446

40 | 41 || 9.0476)-4.764 | 19.054 | 42.872 | 85 | 86 || 0.0050) 0.495 | 1.981 | 4.458
41 | 42 || 0.0469} 4.693 | 18.772 | 42.236 | 86 | 87 || 0.0039] 0.385 | 1.542 | 3.469
42 | 43 || 0.0462} 4.621 | 18.483 | 41.587 | 87 | 88 || 0.0028) 0.275 | 1.102 | 2.479
43 | 44 || 0.0455! 4.547 | 18.189 | 40.925 | 88 | 89 || 0.0017) 0.165 | 0.661 | 1.488 |;
44 | 45 || 0.0447] 4.472 | 17.889 | 40.251 J 89 | 90 || 0.0006; 0.055 | 0.220 | 0.496 ||

==

G 24

709

COMPARISON
OF THE

STANDARDS OF LENGTH

OF
ENGLAND, FRANCE, BELGIUM, PRUSSIA, RUSSIA, INDIA, AND AUSTRALIA,

MADE AT

THE ORDNANCE SURVEY OFFICE, SOUTHAMPTON.

BY
Caprain A. R. CLARKE, BE, F.RS,

UNDER THE DIRECTION OF
CoLonet Str HENRY JAMES, R.E., F.R.S., Erc.,

DIRECTOR OF ORDNANCE SURVEY.

VOL, I.: PUBLISHED BY ORDER OF THE SECRETARY OF STATE FOR WAR. LONDON: PRINTED BY GEORGE EYRE AND
WILLIAM SPOTTISWOODE (PRINTERS TO THE QUEEN’S MOST EXCELLENT MAJESTY) FOR

HER MAJESTY’S STATIONERY OFFICE, 1866.

COMPARISON OF THE STANDARDS OF LENGTH.

VIII.

710

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26

711

IX. TABLES FOR FINDING THE LENGTH OF TIME OF INSOLATION FOR ANY
LATITUDE, AND FOR ANY DAY OF THE YEAR.

The formule for computing the length of time of daily solar illumination are
obtained as follows :—

Let P’’ be the north pole (celestial), S the true place of the
sun’s centre when that centre is brought by refraction to the hori-

2 zon of the place, and let Z be the zenith of the place.
Let § =the north declination of the sun
Z (negative when south) = 90° — PS
/ =the north latitude of the place
S (negative when south) = 90° — PZ
7 = the horizontal refraction = ZS — 90°
h=the hour angle Z PS.
We have cos ZS = cos PZ cos PS + sin PZ sin PS cos ZPS.
Or —sin r = sin /sin 6+ cos / cos § cosh [1]
Also cos (J — 8) —cos / cos 6 + sin / sin & [2]
cos (J+ 6) =cos / cos 6— sin/ sin § [3]

Subtract [1] from [2], and add [1] to [3].
cos (J— 8) + sin r= cos / cos 8 (1 — cosh) =2 cos / cos § sin? Sh [4]
cos (J + 6) —sin r= cos / cos 6 (1 + cos h) =2 cos J cos § cos? Sh [5 |
Observing that sin x + sin y= 2 sin} (x +4 y) cos 4 («— y) the two last equa-
tions give us
sin (45° —4$14 48+ 47) cos (45°—4/7445—47r)
cos 1 cos 8 ee
sin (46° —4/—485—$r) cos (45° —4/—45+447r)
cos / cos 8
which are the formule used in computing the tables.

see)
sin? $h —

[6]
[7]

cos? $h—

The refraction has been assumed to be 34’.

The declinations used are from the Nautical Almanac for 1862, for Greenwich
mean noon; except in finding the limiting date when the sun’s centre does not go
below the horizon throughout the whole day, in which case the midnight declination
has been used.

A supplementary table is given by the aid of which the main table may be used
for southern as well as northern latitudes.

The use of the main table may be illustrated by the following example :—

Find the time of insolation for May 13th, latitude 43°-30 N.

May llth; Jat. 42°. =_14":37 May 11th, lat. 44° = 145.54
2 diff. to May 16th, = + .07 2 diff. to May 16th = + .07
May 13th, lat. 42° 1444 May 13th, lat. 44° = 14".61
2 diff. 42° to 44° ==1 E13 Diff. lat. 42 to 44° — 0.17

May 13th, lat. 43°-30 = 142.57 ans.

The use of the supplementary table is sufficiently plain. For example: To find
the time of insolation for January 6th in any south latitude, add the tabular number
14.97 to the corresponding date of July; with the latter and the latitude of the
place (regarding it as north instead of south) as arguments, the required time of
insolation may at once be found.

G 27

yea

712 IX. LENGTH OF TIME OF INSOLATION.

Latitude North.
DATE.

|
GO | 42 | SO | B2°) 169 20°} 24° 2S° | $2°| 36°C! 400

January 1 || 125.08) 11.86) 115.63) 112.39) 115.15) 105.90) 10®.63 104.35) 10.04) 94.'70 | 92.32
6 || 12.08 | 11.86 | 11.64 | 11.41 | 11.18 | 10.93 | 10.67 10.40) 10.10| 9.77] 9.40
11 |} 12.08 | 11.87 | 11.65 | 11.43 | 11.21 | 10.97 | 10.72 | 10.46 | 10.17| 9.85) 9.50
16 || 12.08 | 11.88 | 11.67 | 11.46 | 11.25 | 11.02] 10.78 | 10.53 | 10.25] 9.95) 9.62
21 || 12.08 | 11.89 | 11.69 | 11.49 | 11.29 | 11.08 | 10.85 | 10.61 | 10.35 | 10.07] 9.75
26 || 12.08 | 11.90 | 11.72 | 11.53 | 11.34 | 11.14 | 10.93 | 10.71 | 10.47 | 10.21] 9.91

February 1 || 12.08 | 11.92 | 11.75 | 11.58 | 11.41 | 11.23 | 11.04 | 10.84 | 10.62 | 10.38 | 10.11
6 || 12.08 | 11.93 | 11.78 | 11.63 | 11.47 | 11.30] 11.13 | 10.95 | 10.75 | 10.54] 10.30
11 || 12.08 | 11.95 | 11.81 | 11.67 | 11.53 | 11.38 | 11.23 | 11.07 | 10.90 | 10.71 | 10.50
16 || 12.08 | 11.96 | 11.84 | 11.72 | 11.60 | 11.47 | 11.34 11.20 | 11.05 | 10.88 | 10.70
21 || 12.08 | 11.98 | 11.88 | 11.78 | 11.67 | 11.56 | 11.45 | 11.33 | 11.20 | 11.06 | 10.91
26 || 12.08 | 12.00 | 11.91 | 11.83 | 11.74 | 11.65 | 11.56 | 11.46 | 11.36 | 11.24) 41.12

March 1 || 12.08 | 12.01 | 11.94 | 11.87 | 11.79 | 11.71 | 11.63 | 11.55 | 11.46 | 11.36 | 11.25
6 || 12.08 | 12.03 | 11.97 | 11.92 | 11.86 | 11.80 | 11.75 | 11.69 | 11.62 | 11.54) 11.46
11 || 12.08 | 12.04 | 12.01 | 11.98 | 11.94 | 11.90 | 11.86 | 11.82 | 11.78 | 11.73 | 11.68
16 || 12.08 | 12.06 | 12.04 | 12.03 | 12.01 | 12.00 | 11.98 | 11.96 | 11.94 | 11.92] 11.90
21 |) 12.08 | 12.08 | 12.08 | 12.08 | 12.09 | 12.10 | 12.10 | 12.11 | 12.11 | 12.12 | 12.13
26 || 12.08 | 12.10 | 12.12 | 12.14 | 12.17 | 12.20 | 12.23 | 12.26 | 12.29 | 12.32] 12 35

April 1 |) 12.08 | 12.12 | 12.16 | 12.20 | 12.25 | 12.30 | 12.35 | 12.41 | 12.47 | 12.53 | 12.61
6 || 12.08 | 12.13 | 12.19 | 12.26 | 12.33 | 12.40 | 12.47 | 12.55 | 12.63 | 12.72) 12.83
11 |) 12.08 | 12.15 | 12.23 | 12.31 | 12.40 | 12.49 | 12.58 | 12.68 | 12.79 | 12.91 | 13.04
16 |, 12.08 | 12.17 | 12.27 | 12.37 | 12.47 | 12.58 | 12.69 | 12.81 | 12.95 | 13.09 | 13.25
21 || 12.08 | 12.19 | 12.30 | 12.42 | 12.54 | 12.67 | 12.80 | 12.94 | 13.10 | 13.27 | 13.46
26 || 12.08! 12.21 | 12.34 | 12.48 | 12.62 | 12.76 | 12.90 | 13.07 | 13.25 | 13.44 | 13.66

May 1 || 12.08 | 12.22 | 12.37 | 12.52 | 12.67 | 12.83 | 13.00 | 13.19 | 13.39 | 13.61 | 13.85
6 || 12.08 | 12.24 | 12.40 | 12.56 | 12.73 | 12.91 | 13.10 | 13.30 | 13.52 | 13.76 | 14.03
11 || 12.08 | 12.25 | 12.43 | 12.61 | 12.79 | 12.98 | 13.19 | 13.41 | 13.65 | 13.91 | 14.20
16 || 12.08 | 12.27 | 12.46 | 12.65 | 12.84) 13.05 | 13.27 | 13.51 | 13.77 | 14.05 | 14.36
21 | 12.08 | 12.28 | 12.48 | 12.68 | 12.89 | 13.11 | 13.35 | 13.60 | 13.87 | 14.17 | 14.51
26 || 12.08 | 12.29 | 12.50 | 12.71 | 12.93 | 13.17 | 13.42 | 13.68 | 13.96 | 14.28 | 14.64

June 1 || 12.08 | 12.30 | 12.52 | 12.74 | 12.97 | 13.22 | 13.48 | 13.76 | 14.06 | 14.39 | 14.76
6 || 12.08 | 12.30 | 12.53 | 12.76 | 13.00 | 13.25 | 13.52 | 13.81 | 14.12] 14.46 | 14.85
11 || 12.08 | 12.31 | 12.54 | 12.78 | 13.02 | 13.28 | 13.55 | 13.84 | 14.16 | 14.52] 14.91
16 || 12.08 |-12.31 | 12.55 | 12.79 | 13.03 | 13.29 | 13.57 | 13.87 | 14.19 | 14.55 | 14.95
21 || 12.08 | 12.31 | 12.55 | 12.79 | 13.04 | 13.30 | 13.58 | 13.88 | 14.20 | 14.56 | 14.96
26 || 12.08 | 12.31 | 12.55 | 12.79 | 13.03 | 13.29 | 13.57 | 18.87 | 14.19 | 14.55 | 14.95

G 28

DATE.

July 1
6

11
16
21
26

August 1
6

11

16

21

26

September 1
6

11

16

21

26

October 1
6

il

16

21

26

November 1
6

11

16

21

26

December 1
6

11

16

21

26

LENGTH OF TIME OF INSOLATION,

125.08] 125.31

12.08
12.08
12.08
12.08
12.08

12.08
12.08
12.08
12.08
12.08
12.08

12.08
12.08
12.08
12.08
12.08
12.08

12.08
12.08
12.08
12.08
12.08
12.08

12.08
12.08
12.08
12.08
12.08
12.08

12.08
12.08
12.08
12.08
12.08

12.08

12.30
12.30
12.29
12.28
12.27

12.25
12.24
12.22
12.21
12.19
12.17

12.15
12.14

128,54) 125,78) 134.02

12.53
12.52
12.50
12.48
12.46

12.43
12.40
12.37
12.34
12.31
12.27

12.23
12.20

12.12 | 12.16

12.10
12.09

12.07 |

12.05
12.03
12.01
12.00
11.98
11.96

11.94
11.93
PIES
11.90
11.89
11.88

11.87
11.86
11.86
11.85
11.85
11.85

12.13
12.09
12.05

12.02
11.98
11.94
1M
11.87
11.84

11.80
11.77
11.74
UST
11.69
11.67

11.65
11.64
11.63
11.62
11.62
11.62

12.76
12.74
12.72
12.68
12.65

12.61
12.57
12.52
12.48
12.43
12.37

12.31
12.26
12.20
12.15
12.10
12.04

11599
11.93
11.88
11.83
era
11.72

11.66
11.61
11.57
11.53
11.49
11.46

11.43
11.41
11.39
11.38
11.38
11.38

Latitude North.

13.00
12.98
12.94
12.90
12.86

12.80
12.74
12.68
12.62
12.55
12.48

12.40
12.33
12.25
12.18
12.10
12.03

11.96
11.88
11.81
11.74
11.66
11.59

11.52
11.45
11.39
11.34
11.29
11.25

11.21
11.18
11.15
11.13
11.13
11.13

20°

24°

28° | S20

36°

713

40°

13®.28
13.25
13.22
13.18
13.13
13.07

12.99
12.92
12.85
12.77
12.68
12.59

12.49
12.40
12.30
12.21
12.11
12.02

11.93
11.83
11.74
11.65
11.56
11.46

11.37
11.28
11.21
11.14
11.08
11.02

10.97
10.93
10.90
10.88
10.88
10.88

138.55
13.52
13.48
13.43
13.37
13.30

13.20
13.11
13.02

12.92
12.82
12.71

12.58
12.47
12.35
12.24
12.12
12.01

11.89
11.78
| 11.67
11.55
11.44
11.33

| 11.21
| 11.11
11.01
10.92
10.85

10.72
10.67
10.64
10. 62
10.61
10.61

29

10.78 |

t

134.84| 14.16
13.81 | 14.12
13.76 | 14.06
13.70 | 13.99
13.63 | 13.90
13.54 | 13.79

13.66
13.54
13.41
13.26
13.12
12.97

13.42
13.32
13.20
13.08
12.96
12.83

12.79
12.63
12.47
12.31
12.15
199

12.68
12.55
12.41
12.27
12.13
12.00

11.82
11.66
11.50
11.34
11.18
11.03

11.86
11.72
11.59
11.45
11.31
11.18

10.86
10.71
10.58
10.46
10.35
10.25

11.04
10.92
10.80
10.70
10.61
10.52

10.17
10.10
10.05
10.01
10.00
10.01

10.45
10.40
10.36
10.33
10.32
10.32

14.46
14.39
14.31
14.20
14.08

13.93
13.79
13.63
13.46
13.29
13.12

12.91
12.72
12.54
12.35
12.17
11.98

11.78
11.59
11.40
11.22
11.04
10.86

10.66
10.49
10.34
10.20

10.07
9.95

9.85
9.77
9.71
9.67
9.65
9.66

145 ,§2| 14".92

14.86
14.77
14.67
14.55
14.41

14.22
14.05
13.87
13.68
13.49
13.29

13.04
12.83
12.61
12.40
12.18
11.96

11.74
11.52
11.31
11.09
10.88
10.68

10.44
10.25
10.07
9.90
9.75
9.61

9.49
9.40
9.33
9.29
9.27

ee

DATE.

January

February 1

March

April

May

June

LENGTH OF TIME OF INSOLATION.

iL
6
11
16
21
26

6
ale
16
21
26

11
16
21
26

11
16
21
26

11
16
21
26

11
16
21
26

40°

92.32
9.40
9.50
9.62
9.75
9.91

10.11
10.30
10.50
10.70
10.91
11.12

11.25
11.46
11.68
11.90
12.13
12.35

12.61
12.83
13.04
13.25
13.46
13.66

13.85
14.03
14.20
14.36
14.51
14.64

14.76
14.85
14.91
14.95
14.96
14.95

AZO

Oba
Jah
9.30
9.43
9.58
9.75

297
10.17
10.38
10.60
10.83
11.05

AS
11.42
11.65
11.89
12.13
12.37

12.65
12.88
13.11
13.34
13.56
13.78

13.98
14.18
14.37
14.54
14.69
14.83

14.97
15.07
15.13
15.17
15.19
15.18

| 440 | 460

84.89 | 82.65
8.98| 8.74
9.09 | 8.86
9.23 | 9.01
GES9N ELD
9.58 | 9.39

9.82] 9.65
10.03 | 9.88
10.25 | 10.12
10.49 | 10.37
10.74 | 10.64
10.98 | 10.90

11.12 | 11.05
11.37 | 11.32
11.62 | 11.59
11.88 | 11.87
12.14 | 12.14
12.39 | 12.41

12.69 | 12.74
12.94 | 13.01
13.19 | 13.27
13.43 | 13.53
13.67 | 13.79
13.90 | 14.03

14.12 | 14.27
14.34 | 14.51
14.54 | 14.73
14.72 | 14.93
14.89 | 15.11
15.04 | 15.27

15.20 | 15.44
15.30 | 15.55
15.37 | 15.63
15.41 | 15.67
15.43 | 15.69
15.42 | 15.68

Latitude North.

48°

20°

2°

54°

56°

58°

60°

84.39
8.48

8.62 |

8.78
8.97
9.18

9.46
9.71
9.97
10.25
10.53
10.81

10.98 |

11.27
11.56
11.86
12.15
12.44

12.79
13.08
13.36
13.64
13.92
14.18

14.44
14.69
14.93
15.15
15.35
15.52

15.70
15.82
15.91
15.96
15.98
15.97

84.10
8.20
8.35
8.52
8.73
8.96

9.26
9.53
9.82
10.12
10.42
10.72

10.90
11.21

11.53 |

11.85
12.16
12.47

12.84
13.16
13.46
13.76
14.06
14.34

14.63
14.89
15.15
15.39
15.61
15.80

15.99
16.12
16.22
16.28

| 16.30

16.29

9.05
9.34
9.65
Ror
10.29
10.62

10.82.

11.15
11.49
11.83
12.17
12.50

12.90
13.24
13.57
13.89
14.21
14.52

14.83
15.12
15:39
15.65
15.89
16.11

16.32
16.46
16.57
16.64
16.66
16.64

75.40
7.53
bl
7.93
8.17
8.45

8.81
9.13
9.46
9.81
10.16
10.51

10.73

11.09,
11.45 |
aaeen i
12.18 |
12.54

12.97
13.33
13.68
14.03
14.38
14.71

15.05
15.37
15.66
15.95
16.21
16.45

16.69
16.85
16.97
17.04
17.06
17.04

30

GR399
7213
7.33
7.57
7.84
8.15

8.54
8.89
9.26
9.63
10.01
10.39

10.62
11.02
11.41
11.80
12.19
12.58

13.04
13.43
13.81
14.19
14.57
14.93

15.29
15.64
15.97
16.29
16.58
16.84

edit
17.29
17.43
17.50
17.53
17.51

65.51
6.67
6.89
7.16
7.47
7.81

8.24
8.62
9.02
9.43
9.84
10.26

10.51
10.94
11.36
11.78
12.20
12.62

13.12
13.54
13.96
14.37
14.78
15.18

15.57
15.96
16.32
16.67
17.00
17.29

17.60
17.80
17.95
18.05
18.08
18.05

52.92
6.12
6.38
6.68
7.03
7.41

7.90
8.32
8.76
9.21
9.66
10.11

10.38
10 84
29)

11.75 ||

12.21
12.66

13.21
13.66
14.12

14.57 ||
15.01 ||
15.45 ||

15.89
16.32
16.72
ele
17.48
17.82

18.18
18.42
18.60
18.71
18.75
18.72

DATE.

40°

LENGTH OF TIME OF INSOLATION.

42° | 440

46°

Latitude North.

48° | 50°

July 1

August 1

September 1
6

11

16

21

26

October 1

November 1
6

11

16

21

26

December 1
6

11

16

21

26

142.92
14.86
14,77
14.67
14.55
14.41

14,22
14.05
13.87
13.68
13.49
13.29

13.04
12.83
12.61
12.40
12.18
11.96

11.74
11.52
11.31
11.09
10.88
10.68

10.44

10.25 |
10.07 |

9.90
9.715
9.61

9.49

9.40 |

9.33
9.29
9.27
9.28

152.37
15.30
15.21
15.09
14.94
14.78

155.14
15.07
14.98
14.87
14.74
14.59

14.56
14.36
14.15
13.94
13.72
13.47

14.39
14.20
14.00
13.80
13.60
13.38

13.11
12.88
12.65
12.42
12.19
11.96

13.19
12.95
12.70
12.45
12.20
11.95

11.69
11.44
LiL
10.95
10.71
10.47

11.72
11.48
11.25
11.02
10.80
10.58

10.32
10.12
9.92 |
Oia
9.57
9.42

10.19
9.97
9.76
9.56
9.39
9.22

9.30
' 9.20)
i 9.12 |
9.07 |
9.05
9.06

9.09
8.98
8.89
8.84
8.82

8.84 |

154.63} 154.92) 165.24

15. 5
15.46
15.32
15.16
14.99

14.75
14.53
14.31
14.08
13.84
13.57

13.27
13.01
12.74
12.48
12.21
11.94

11.67
11.40
11.13
10.87
10.61
10.35

10.05
9.82
9.59
9.38
9219
9.01

8.86
8.73
8.64
8.59
8.57
8.99

15.83 | 16.14
15.72 | 16.01
15.57 | 15.85
15.40 | 15.67
15.21 | 15.46

14,95 | 15.17
14.72 | 14.93
14.48 | 14.67
14.23 | 14.39
13.96 | 14.11
13.69 | 13.82

13.36 | 13.46

13.08 | 13.16

12.79 | 12.85
12.51 | 12.54
12.22 | 12.23
11.93 | 11.92

11.64 | 11.61
11.35 | 11.30
11.06 | 10.99
10.78 | 10.68
10.50 | 10.39
10.22 | 10.09

9.90
9.65
9.40
9.17
8.96
8.77

9.74
9.47
9.20
8.95
8.72
8.52

8.34
8.20
8.09
8.02
8.00
8.01

8.61
8.48
8.38
8.32
8.30
8.31

3l

azo

34° | 56°

38°

715

60°

165.59
16.48
16.34
16.16
15.96
15.73

15.43
15.15
14.87
14.57
14.26
13.95

13.56
13.24
12.91
12.58
12.24
11.91

11.58
11.24
10.91
10.58
10.26

9.94

9.56
9.27
8.98
8.71
8.46
8.23

8.04
7.89
Weld
7.69
7.66
7.68

165.98
16.86
16.71
16.51
16.29
16.03

15.71
15.40
15.09
14.77
14.43
14.09

13.68
13.33
12.98
12.62
12.26
11.90

11.54
11.18
10.82
10.47
10.12

9.78

9.37
9.05
8.73
8.44
8.16
7.91

7.70
7.53
7.40
7.32
7.28
7.31

175.43
17.30
17.13
16.91
16.66
16.38

17.82
17.62
17.37
17.09
16.78

16.01
15.68
15.34
14.99
14.62
14.25

16.36
16.00
15.62
15.24
14.84
14.43

13.81
13.42
13.04
12.66 | 12.71
12.27 | 12.29
11.89 | 11.88

13.95
13.53
13.12

11.50 | 11.46
11.12} 11.05
10.73 | 10.63
10.35 | 10.22
9.97} 9.80
9.60} 9.39

9.15
8.80
8.46
8.13
7.83
7.56

8.90
8.52
8.15
7.79
7.45
7.15

7.32
7.13
6.98
6.89
6.85
6.88

6.88
6.66
6.50
6.39
6.35
6.38

17, 97 Pees Gt

18.44
18.20
17.92
17.60
17.24

16.77
16.37
15.95
15.52
15.08
14.64

14.11
13.66
13.21
12.76
12.31
11.86

11.41
10.96
10.51
10.06
9.61
9.17

8.63
8.21
7.79
7.39
7.02
6.67

6.36
6.11
5.92
5.79
5.75
5.78

716 LENGTH OF TIME OF INSOLATION.

Latitude North.

| DATE. | |
| 60° GO | 62° 63°} 64° 65°) 66° 67°) GSS 69° | 70°

January 1 || 58.92} 58.59 | 5%.22| 4.79 | 4".30 | 38.70] 28.91 | 15.60 | Appeats

Jan.6
lk 31
A.M.
appesrs
an. 13,
6 || 6.12| 5.80| 5.45) 5.05| 4.59| 4.05| 3.37] 2.46] 0."63| As
11 || 6.38] 6.08| 5.75| 5.39| 4.97| 4.48] 3.91] 3.17] 213 aes

16 || 6.68| 6.41| 6.11| 5.77] 6.40] 4.97| 4.48] 3.87] 3.10] 15.97) Ahir
21 || 7.03) 6.78| 6.51] 6.21] 6.88| 5.50] 5.08] 4.58] 3.97| 3.20) 25.06
26 || 7.41| 7.19| 6.95] 6.69] 7.40| 6.07| 5.70| 5.28] 4.79| 4.20] 3.45

February 1 || 7.90| 7.71] 7.50) 7.27| 7.02| 6.75) 6.44] 6.10) 5.11) 5.27| 4.73 |
6 | 8.32| 8.15) 7.97) 7.77) 7.56) 7.383) 7.07| 6.78) 6.45) 6.09) 5.67

11 8.76| 8.61) 8.46] 8.29) 8.11) 7.91) 7.69| 7.45) 7.18] 6.88] 6.54

16 || 9.21] 9.09} 8.96| 8.82] 8.66] 8.49] 8.31]. 8.11] 7.89) 7.64) 7.37

21 || 9.66| 9°56| 9.44] 9.33] 9.20} 9.07] 8.92] 8.76] 8.58| 8.38) 8.16

26 ||10.11| 10.03! 9.94| 9.84] 9.74] 9.63] 9.81] 9.38] 9.25] 9.10] 8.93

March 1 | 10.38/ 10.31 | 10.24 10.16 | 10.07 9.98) 9.88) 9.77) 9.65) 9.52) 9.38
6 || 10.84! 10.79 | 10.74 | 10.68 | 10.62 | 10.55 | 10.48 | 10.40 | 10.32] 10.23 | 10.13
41 || 14.29 | 11.26 | 11.23 | 11.20 | 11.16 | 11.12] 11.08 | 11.03 | 10.98 | 10.92 | 10.86
46 14.75 | 11.74] 11.73 | 11.72 | 11.70 | 11.69 | 11.67 | 11.65 | 11.63 | 11.61 | 11.58
21 | 12.21) 12.21 | 12.22 12.23 12.24 12.25 | 12.26) 12.97 | 12.29 | 12.30 12.31
26 | 12.66 12.69) 12.72 12.75 12.78 12.82) 12.86 12.90 | 12.94 | 12.99 13.04
April 1 13.21 13.26 | 13.31 13.37 13.43 | 13.49 | 13.56 | 13.64] 13.72 13.81 13.92|
g || 13.66 | 13.73 | 13.80 | 13.88 | 13.97 | 14.06 | 14.16 | 14.27 | 14.38 | 14.51 | 14.66
11 14.12] 14.20 14.30 | 14.40 | 14.51 | 14.63 | 14.76] 14.90 | 15.05 | 15.22 | 15.41
16 |) 14.57 | 14.67 | 14.79 | 14.92] 15.05 | 15.19 | 15.36 | 15.54 | 15.73 | 15.94] 16.18
21 || 15.01! 15.14] 15.28 | 15.44 | 15.60 | 15.77 | 15.97 | 16.19 | 16.42 | 16.68 | 16.98

96 || 15.45 | 15.60 | 15.77 | 15.95 | 16.14 | 16.35 | 16.59 | 16.84 | 17.13 | 17.45 | 17.82

EE

May 1 || 15.89 | 16.07 | 16.26 | 16.47 | 16.69 | 16.94 | 17.21 | 17.51 | 17.86 | 18.26 | 18.72
6 || 16.32 | 16.52 |.16.74 | 16.98 | 17.23 | 17.52 | 17.85 | 18.21 | 18.63 | 19.12 | 19.71 ||
11 | 16.72 16.95 | 17.20 | 17.47 | 17.77 | 18.10 | 18.48 | 18.92 | 19,43 | 20.05 | 20.86
16 || 17.11 | 17.37} 17.65 | 17.95 | 18.30 | 18.68 | 19.13 | 19.66 | 20.30 | 21.15 | 22.55
21 || 17.48 | 17.77 | 18.08 | 18.42 | 18.81 | 19.26 | 19.79 | 20.45 | 21.31 | 22.81 | Adore |

horiz

26 || 17.82 | 18.13 | 18.47 | 18.86 | 19.30 | 19.82| 20.46] 21.29 | 99.68) Abore, | rom
irom 0h 59
June 1 || 18.18 | 18.52 | 18.90 | 19.33 | 19.84 | 20.46 | 21.27 | 22.56 | Above "as July 2
6 118.42! 18.78 | 19.19 | 19.66 | 20.23 | 20.94 21.95 | Abere, oe Suly 3h, DM
11 || 18.60 | 18.98 | 19.41 | 19.92 | 20.54] 21.34 | 29.65 | rom | o%-26 eu ae :

16 |] 18.71 | 19.11 | 19.56 | 20.09 | 20.74 | 21.62 | 23.40 | uy | tu

to July

16,
21 || 18.75 | 19.15 | 19.60 | 20.14 | 20.81 | 21.72 | Above [9 PM P6 | 112 56

P M. P.M.
35d23h.31 49d23.430

23h.&5,
5d 23h.85

26 | 18.72 19.11 nee 20.09 | 20.75 | 21.64 23.45 |
_____—
G 32

LENGTH OF TIME OF INSOLATION.

T1T

Latitude North.
DATK.
65° | 66°

62° | 63°

64°

60°, 61°

225.72
22.02

192.43
19.21

195.94) 205.56
19.69 | 20.25

214.38
20.99

192.00
18.81

185.61
18.44

July

21.34
20.65
20.00
19.34

18.93
18.58
18.20
17.79

20.51
19.98
19.44
18.87

18.55
18.23
17.88
17.50

19.37 | 19.88
18.98 | 19.44
18.56 | 18.97
18.11 | 18.46

18.20
17.92
17.60
17.24

11
16
21
* 26

18.56
17.93
17.30
16.68
16.07
15.47

17.25
16.79
16.32
15.85
15.37
14.89

18.17
17.60
17.02
16.44
15.86
15.30

16.77
16.37
15:95
15.52
15.08
14.64

17.00
16.57
16.13
15.68
15.22
14.76

17.52 | 17.83
17.03 | 17.30
16.54 | 16.77
16.03 | 16.23
15.52) 15.68
15.02 | 15.15

1
6
11
16
21
26

August

14.28
13.80
13.31
12.82
12.33
11.85

14.75
14.16
13.57
12.98
12.39
11.81

14.19
13.73
13.26
12.79
12.32
11.86

14.50
13.97
13.43
12.90
12.36
11.83

14.38
13.88
13-o7
12.86
12.35
11.84

14.62
14.06
13.50
12.94
12.38
11.82

14.11
13.66
13.21
12.76
12.31
11.86

September 1
6

11

16

21

26

11.22
10.63
10.05
9.46
8.85
8.25

11.36
10.87
10.37
9.88
9.38
8.89

11.30
10.76
10.22
9.69
9.14
8.60

11.26
10.70
10.14
9.58
9.00
8.43

11233
10.82
10.30
9.79
9.27
8.75

11.41
10.96
10.51
10.06
9.61
oe

1
6
11
16
21
26

11.39
10.92
10.44
oT
9.50
9.03

October

7.51
6.90
6.28
5.66
5.06
4.46

8.32
“7.84
7.38
6.92
6.50
6.10

1.95
7.41
6.88
6.36
5.87
5.38

7.74
eli
6.60
6.04
5.49
4.96

8.14
7.63
7.14
6.66
6.20
5.76

8.63
8.21
7.79
7.39
7.02
6.67

8.48
8.03
7.59
ole
6.77
6.40

November 1
6

11

16

21

26

4.95
4.58
4.29
4.09
4.02
4.06

4.47
4.04
3.69
3.45
3.36
3.41

3.89
3.06
2.92
2.61
2.48
2.55

5.74
5.44
5.21
5.06
5.01
5.05

Son
5.04
4.79
4.62
4.55
4.59

6.36
6.11
5.92
5.79
5.75
5.78

6.07
5.79
5.58
5.45
5.41
5.44

December 1
6

11

16

21

26

67° | GSO

Disap-
pears
July 9,
11h.56 Disap-
M pears
July 16,
11h.56
P.M.

235.46
21.66
20.60

222.70
21.57
20.69
19.90

19°53
18.72
17.98
17.24
16.53
15.85

19.00
18.30
17.62
16.95
16.29
15.65

15.04
14.38
13.73
13.08
12.43
io)

14.89
14.27
13.65
13.03
12.41
11.80

11.14
10.49
9.84

11.18
10.56
9.95

9.18
8.50
7.82

9.33
8.68
8.05

6.98
6.26
5.52
4.75
3.95
3.07

7.26
6.60
5.93
5.24
4.55
3.85

2.08
0.54

3.14
2.44
Led
1.15
0.81
1.02

from
Dec 6,
12h.27
P. M.
to Janu. 6,
W1N.3L

a. M.
Pee ae

Below |
horizon eas
|

|44d23h.14

69° | FOC

Disap-
pears
July 21,
11h.78 Disap-
pears
July 26,
11h.64
P.M.

14.58
20.17
19.23
18.38
17.57
16.80
16.07

215.02)
19.84
18.85
17.96
17.12
16.31

15.21
14.51
13.82
13.13
12.45
11.78

15.40
14.65
13.92
13-19
12.47
we

11.04
10.32
9.59
8.85
8.08
7.29

11.09
10.41
9.72
9.02
8.30
7.57

6.66
5.88
5.04
4.15
3.17
1.92
Below
horizon
from
Nov. 29,
12h.30
P.M

to Jan.
h 54
M,

A M.
54d23k.77 |
|

33

718 LENGTH OF TIME OF INSOLATION.
Latitude North,
DATE. 3 :
70° | YEO | Y2O) FSO} V4O| F5O) YEO i 78°) 79° 80°
‘Appears p
Jan. 23, bi
January 21 || 24.06) x°a ae Jao. 31,
26 || 3.45 | 2n.40'| DRS! | Rag? |Appears
b. 3,
February 1 |) 4.73] 4.08 | 38.22 | 18.88] Ai. Appears Appears
GA G6 75071 A. De | (S688) QP 7A eel cae ae | ae ee a
11 ‘\) 6.54'|-°6.15 | -5.70 | 5.16 |: 4.494-3n, 66 an, 93 | 2It2% 4 -1g0 | Appears | Appears
16 || 7.37] 7.06| 6.71| 6.30] 5.82] 5.23] 4.48] 38.46] 12.64) Aowe | 20 ane
21 || 8.16| 7.93| 7.65] 7.33] 6.97] 6.54] 6.03] 5.40! 4.57) 34.38 | 05.63
26 || 8.93| 8.74] 8.531 8.29] 8.02] 7.71] 7.341 6.91] 6.37! 5.70; 4.78
March 1 || 9.38] 9.23] 9.06] 8.86] 8.63] 8.37] 8.07] 7.72] 7.30| 6.78] 6.12
6 {110.23} 10.02| 9.90| 9.76] 9.61| 9.43] 9.23] 9.00] 8.72] 8.39] 7.98
11 || 10.86 | 10.79 | 10.72 | 10.64 | 10.54 | 10.44 | 10.382 /10.17/ 10.01 | 9.82] 9.60
16 || 11.58 | 11.56 | 11.53 | 11.50 | 11.46 | 11.42 | 11.38 | 11.33 | 11.27 | 11.20 | 11.12
21 || 12.31 | 12.33 | 12.35 | 12.37 | 12.39 | 12.42 | 12.45 | 12.49 | 12.53 | 12.58) 12.64
26 || 13.04} 13.10 | 13.16 | 13.23 | 13.31 | 13.40 | 13.51 | 13.63 | 13.77 | 138.94 | 14.14
April 13.92 | 14.03 | 14.15 | 14.29 | 14.44 | 14.61 | 14.81 | 15.05 | 15.33 | 15.66 | 16.08
6 || 14.66 | 14.82 | 14.99 | 15.18 | 15.41 | 15.67 | 15.96 | 16.31 | 16.74 | 17.26 | 17.93
11 || 15.41 | 15.62] 15.85 | 16.11 | 16.42 | 16.78 | 17.19 | 17.70 | 18.33 | 19.16 | 20.35
16 |/ 16.18 | 16.45 | 16.75 | 17.10 | 17.51 | 17.99 | 18.58 | 19.33 | 20.37 | 22.19 | Aavove
24 || 16.98 | 17.32 ) 17.71 | 18.16 | 18.71 | 19.39 | 20.29 | 21.70 | avove | Above | trom |
26 || 17.82 | 18.24 | 18.75 | 19.36 | 20.14 | 21.26 Above | Ahove ek am Te
orizon | horizon | April 20, ril 17, = =O
May ] AS. (2 19.27 | 19.95 | 20.86 | 22.36 a oe ee ons aitisto, “Hi
6 aot 20.46 21.52 Above: sA bore. Apna, A. 0 ine ee apa 1,30" | 137d22.38
11 || 20.86 | 22.09 | Above | from | from, Ait hs Aug, 20, | PM g(101d22.%0
Tp eanoe aor ea Se dims ool aiatsen 1d.ge” | 11342801 119438°05
eee oh.58 | Aug. 7, | Aug. 11,!_ P.M.
May 13, | 4:M. to | 114.60 | 112.24 1074.22.87
thas | Auge 3,0. Mo | P.M.
NCO | V1A.71 98d23h.25 101d22.63
July ay) ega2ah.13
P.M:
|78d23h.29
Latitude North.
DATE, =
80°; 81°) $20) §3°| 84°) 85° | 86° 87°) S&° | SHC} 900
Appears | ae) eg
Feb 24,
February il 05.63 Sar Appears
o Pes eb 27, |
26 || 4.78) 3h,41 11h.06 | Appears | Appears
ne A. M. Mar. 1,| Mar. 4, |
Mera eeligg ge | Cree eee tea ke Bera [oe edad
Bi 28) 7.4766. 79 [oh Bd | AB BD lear liens | appears A pueare
it | ee 9.31] 8.95| 8.47] 7.82 | 6%.84| 58.13 | 1g? | Whol |Appears
16 | 11-12) 11.02 | 10.89 | 10.73 | 10.52 | 10.21 | 9.74| 88.95 | 72.24] 2839 | Appears
21 | 12.64) 12.71 | 12.80 | 12.92 | 13.06 | 13.24 | 13.60 | 14.15 | 15.28 | 198.53) 4s?
26 |) 14.14) 14.39 | 14.71 | 15.12 | 15.68 | 16.51 | 17.88 | 21.08 pened oer
April 111 16.08 / 16.59 | 17.28 | 18.25 | 19.79 | torizon| Horton | nerizon | sar-24,| alr, | Nave
6 || 17.93 | 18.83 | 20.19 | Above | Above | from. | from | from 1h.73 | 3h.38 | Sept. 24,
horizony|| Horizonu|po Peels | Mar. 29, | Mar. 27, | A.M. to} A.M. to! 6 P.M.
11 20.35 99.85 | Above | from ian 0h.63 Th. = 0h.42 Sept. 19,| Sept. 22,| 189d sh.
“S" | horizon | April6,| Aprils, !A:M.to | A.M. to) A.M.to | 102.51 | 8h.87
| Above Above | trom Oh.84 1n.21 | Sept. 11, Bepes: Sept. 17,| P. M. P. M.
| horizon | horizon | April9,! A.M. to | A.M. to| 11.47 10h.78 10h.09 = 179d 20.78 185d 17.49
| from from 02.35 Sept. 6, | Set. 9, |__P, M- P. M. Pent
| April 14,| Aprilll, A. M. e 11h.16 1on.73 163d 22.84 169d 21.47) 174d 21.67
| 0h.78 0h.97 | Sept. 3, P.
'A.M.to] A.M.to 11h. ne 153023. 32 15921. 67
| Aug. 29,] Sept.1, _P.
| 11h.16 ions Tidaiee
re M. '
137d422.38 vied 22.01 |
G 34 a4

|
|

LENGTH OF TIME OF INSOLATION.

719

Latitude North.

DATE. 5
70° | YEO] 9720] 93°] V4O] FHC 16° | 77° 78° | 79° | 80°
July 30, | Disap-
114.82 pears
A.M ane. Ss Disap- Disap
August 1 |/215.02/22'.37) pow. | Xue 7, | Aue 11,| pieap
. 9\« 11h.50 | 11h.2 nace
6 || 19.84] 20.62 | 214.77] Tse | 124 et, aa bree
18.85 | 19.42 | 20.14 ae 225.99 p. M. Aug. 17, slug. 20, | Disap- | Disap-
NG" ||"t7-96 \(18-SOnve: 92 t9- 56s 20.4 Imerys eee | eigen | ete ae beatae
21. || 17.12) 17.46 | 17.86 | 18.34) 18.91 | 19.64 |20.64 225.33] B'x? | Bag? | Disar
26 | 16.31 | 16.59 | 16.91 | 17.27 | 17.70 | 18.21 | 18.84 | 19.65 |20%.82 | 24.00] Ans: 29
P.M.
September 1 || 15.40 | 15.61 | 15.84 | 16.10 | 16.40 | 16.75 | 17.17 | 17.67 | 18.30 | 19.12 [20.30
6 || 14.65 | 14.81 | 14.98 | 15.19 | 15.40 | 15.66 | 15.95) 16.30 | 16.73 | 17.24 | 17.91
11 || 13.92 | 14.03 | 14.15 | 14.29 | 14.45 | 14.63 | 14.83 | 15.06 | 15.34 | 15.68 | 16.09
16 || 13.19 | 13.26 | 13.34 | 13.42 | 13.52 | 13.63 | 13.75 | 13.89 | 14.05 | 14.25 | 14.48
21 || 12.47 | 12.51 | 12.54 | 12.56 | 12.60 | 12.64 | 12.69 | 12.74 | 12.80 | 12.88 | 12.97
26 || 11.77 | 11.76 | 11.74 | 11.72 | 11.70 | 11.68 | 11.65 | 11.62 | 11.59 | 11.55 | 11.50
October 1 || 11.04] 10.99 | 10.93 | 10.86 | 10.78 | 10.70 | 10.59 | 10.57 | 10.34] 10.18) 9.99
6 | 10.32/10.22| 10.11} 9.99} 9.85] 9.70] 9.52) 9.31] 9.06] 8.77] 8.41
Ii || 9.59) 9.45) 9.291 9.11) 8:90] 98.67] 8:40] 8.09] 7.71| 7.25) 6.67
16 || 8.85] 8.66] 8.44/ 8.19] 7.91] 7.59] 7.21) 6.76| 6.20} 5.48| 4.51
21 || 8.08) 7.83] 7.55! 7.23] 6.86! 6.42] 5.89! 5.23| 4.35] 3.06 | Below
26 || 7.29] 6.98) 6.62) 6.20) 5.70| 5.09] 4.31] 3.22] 1.00] Below | Oct. 20,
Oct. 23, | P. M. to
November 1 || 6.30| 5.88} 5.39] 4.80] 4.05} 3.01] 0.93 Below | Below ae a
6 || 5.43} 4.90) 4.25); 3.40| 2.09 Relowsih eeloM Get. 29, (et. 26, pinta 193429,91
11 4:47) 3.76), 2.79 | 0.92 horizon | 12n60 ae | P.M. to |B. M. to eeaae0
16 || 3.39] 2.31 | Below | Below | Nov. 7, | P.M. to| P.M. to| Gy or" | Sanay”
horizon | borizon | 12k.72 | Feb. 7, | Feb. 10,| ‘at | a.
PE ime esa ORG a [eee 11h.26 11h 28 | ogd 22.72 112d2~.70
26 Bed eis Ney. ae Re a os 94d22h.67 101d 22.78) |
Nov. 24, | P.M. to | 11h.61 | 114.40’ g7a92h.92
12 M to} Jan. 23, .M. a. M.
Jan. 18, 11h.53 |72d23h. 23 80d22h.91 FE |
11h.77 A.M.
A.M. |64d23h.19
564d23h.77
| eS |
Latitude North.
DATE. | z ;
80° | 81°} 82° | §3° | $40 | §5° | 8GO | S7° | SSO | 89° | 900
Sept. 1, Pe
pa Sant. s Disap- Disap
September 1 | 208.30) 22".67 rane Sept. 6, Sept 9 Disap- | Disap-
1h 5 ears ears
6 legit 18.80 | 205.15 P.M. ». M. Sept. 11, Sept. 14, Disap- Disap- Disap-
11 || 16.09 | 16.61 | 17.30 | 184.27] 198.83] ba! | bw: | sBS%, | sepr io sevt-22.| picap-
16 || 14.48 | 14.78 | 15.15 | 15.64 | 16.31 |17%.33|19".13) Py? | Plan | pea | Ptr,
a1 || 12.97 | 13.08 | 13.21 | 13.39 | 13.62 | 13.96 | 14.46 | 15» 33) 174.24 Pon.
96 || 11.50| 11.44] 11.37 | 11.28] 11.16 | 10.98 | 10.72 | 10.29 | 9.41
October 1 || 9-99] 9.75] 9.46] 9.07] 8.54] 7.78) 6.52] Below | Beton | itor | elem
¢ || 8.41] 7.97| 7.38] 6.59] 5.41 | Below | Below anit tka ya. Mar
11 || 6.67| 5.91] 4.84) 3.02] Below | O51 | Oot. 4: | Mar. a3, | ete | Maram, | tose ven
Tate eo Bee RS RL ara TAL Re a) el
| Below | Below | Oct.15,| Oct. 12,| P.M. to| 104.63 | 114.20 165d21.63|171d18.20
| horizon | horizon | 122.35 12h.84 Mar. 4, A.M A.M.
Oct. 20, | Oct. tts P.M. to| P.M. to| 114 20 |150d22.00 155d21.98)
12h.77 1h.0 Feh. 27, | Mar. 1, AM
P. M. to| P. M. Oe ip ue 12h M. |145d21.98
Feb. 21, | Feb. 24, .M. |139d23 16
ee yee 33 sida a
.M. .M.
23d. 91 CE 33.
G 35

720 LENGTH OF TIME OF INSOLATION.

Table from which may be taken for any given date the number of days to be added
(algebraically, as the sign directs) to its supplementary date so as to give the date with which
to find from the table of insolations for the given date the insolation for the given date in a
southern latitude.

Days to be | Days to be Days to be Days to be
added to added to added to added to
Given date. supple- )| Given date.| supple- Given date. supple- Given date. supple-
mentary mentary | mentary mentary
date. date. date. © date.
|
| January 6|+ 14.97] April 6 |-+ 34.51] July 6|— 14.83] October 6 |— 34.53
16 | + 2.66 16 | + 3.39 16 | — 2.52 || 16 | — 3.44
26 | + 3.31 26 | + 3.18 | 26 | — 3.18 26 | — 3.26
February 6 | + 3.95 | May 6 /|+ 1.86 August 6) — 3.71 | November 6 | — 1.92
16 | + 4.46 16 | + 1.45 16 | — 4.25 | 16 | — 1.52
26 | + 4.86 26 | + 0.96 || 26 | — 4.68 26 | — 1.03
| | |
! March 6|-+ 2.14 || June 6 | + 1.30 || September 6 | — 2.08 | December 6 | — 1.39
16) + 2.38 || 16 | + 0.64 | 16 | — 2.34 |, 16 | — 0.68
26 | + 2.50 26 | — 0.03 || 26 | — 2.48 || 26 | + 0.03

ALPHABETICAL INDEX.

A.

PAGE
Air, column corresponding to a Millimetre in Barometer .. . «cA
« same at different Temperatures and Elevations : : - 429
** column corresponding to tenths of an inch in Barometer ; « 427
s same at different Temperatures and Elevations : : - 430
“cubic foot, Dry and Saturated, compared . : : - 180
Albany, Monthly corrections Non-periodic Variations of Temperature 3, OE
Altitudes, comparison of lengths used in measuring . : : 449-500
Amherst, Hourly corrections Periodic Var. Temperature. : ~* O02
Apenrade, Hourly corrections Periodic Var. Temperature. : - 6382
Apjohn, Factors for computing Force of Vapor : : : Bye 7A
Aqueous Vapor, comparison of Dry and Saturated Air : ; 2 SO
“ *« Elastic force of, in French measures, Regnault : 0 2 46
os: ge ge Ks Greenwich constants i ‘ sou) lave
“ ee és es in Millimetres, August : ; = lS6
es ae “ cs ke « Ngemtzi ic his = 318s
cs a = a Ee Magnus. . « ¥hS8
ee ¢ S oe Cubic Foot of Saturated Air : - 1380

e - se “: ee - = ‘“« Greenwich

~l
oO

constants . 1
‘ Force of, and Relative Humidity corresponding to degrees

n

ce

of Saussure’s Hygrometer, Gay Lussac . gle
< gs ee different values of different authorities. + a0
" a ce English measures, Regnault : ; = 8
cs es oe Greenwich Hourly corrections, Glaisher . » 685
“ ee es Inches, Royal Soc. j : f , se
66 a oe weight of, in Cubic Metre of air . 2 a pee

a a as “ Factor for deducing from indications of
dew point instruments : 7 les

“ cs “ us in Grammes, in Cubie Metre of air,
Kaemtz : : ; oy 192

“ ee MS “ in Grammes, in Cubic Metre of air,
Pouillet ; : : « ~ho2
Arc, from Sidereal Time : ; : ; ‘ : 2695
«« into Sidereal Time : 3 : ; : ‘ = O98,
Athabasca, Hourly corrections Periodic Var. Temperature. 3 « 089

(72h)

Ge ALPHABETICAL INDEX.

August, Elastic force of Vapor in Millimetres : : :
Australia, standards of Length compared with other nations :
Austrian Miles into Kilometres ; : : 4 5

a “6 Prussian Miles,

Ke uo German Miles,

ee < Nautical Leagues,

ee ce French Leagues,

sf e Geographical Miles,

ee 4 English Statute Miles,

ce 6 Russian Wersts . 5 . R -
Austrian Square Miles into Square Kilometres . ° ‘

es i es Prussian Square Miles,

es ce es German Square Miles,

ee ce ce Nautical Square Leagues,

as cs ee French Square Leagues,

Os es cs Geographical Square Miles,

ee a os English Square Statute Miles,

x 4 4 Russian Square Wersts . ; A

B.
Baily, depression of Barometric column, capillary — . 5 :
‘© Hypsometric Tables, English measures 3 Z i

Barometer, English and Metrical compared . er : :

6“ 6 ‘¢ old French compared z E i

sc ‘brass scale reduced to freezing point :

ss «capillary correction : :

“ <¢ 6 from Metrical : : :

Ke ce 7 old Frenchy. . ; :

“ ‘¢ glass or wooden scale reduced to freezing pein

Ke equivalents of millimetres, in metres : ;

ge same at different Temperatures and Elevations

ee equivalents of Paris Lines, in French Feet

ee Ke tenths of an inch, in English Feet

ca same at different Temperatures and Elevations

a Metrical, capillary corrections (Meniscus)

‘6 ue from English. : :

e gs ‘old French ;

ss se ec Russian] —/: : :

“6 es into English. : : ;

“s eC reduced to freezing point, Delcros : -

“ce 66 66 66 6é Haeghens

old French, reduced to freezing point . : ;

ce es compared with English : :

ts ss te ‘© Metrical : : :

oe ss e ‘* Russian : :

PAGE

186
709
508

508
540

540

340
407
215
219
269
337
225
238
276
427
429
427
427
430
338
215
243
247
225
281
287
330
238
248
252

~

ALPHABETICAL INDEX.

Barometer reduced to Sea Level : : : : . :
Barometric column, capillary correction for English Barometers : 7
‘6 “ “ ce «« French Barometers : :
“6 a Ge depression, Baily . : : :
6“ «“ “6 a Weleros/ =: : °
“ ‘6 ‘6 = Gehler ; : : :
“ “ eS - Pouillet : 7
e differences, comparison of : 257-
a pressure, true mean, Hourly Corrections, cae .
6 “ ‘6 ec “ ce Philadelphia ;
ee pressures, corresponding to er meretntes of boiling water, Metrical
6 a same, Metrical, Regnault : “1 :
ce Kc same, English measures C A A 3
os scales, comparison of different. : 3 : 209—
Barometrical Tables . ; : : : 209_—
Bavarian Feet, into Metres . : ; , , :
Belgium, standards of Length compar ald with other nations . : :
Berghaus, Horary correction . 3 : : : é 2
Berlin, Hourly corrections Periodic Var. Temperature . : ;
«‘ Monthly corrections Non-periodic Var. Temperature :
Bernaul, Hourly corrections Periodic Var. Temperature : d 606—
Bessel, Plantamour’s Hypsometric Tables. : ‘ :
Boiling water, Temperatures and corresponding Barometric pressures, English
measures. : ; ; ‘ ;
a es same, Moritz, Metrical measures - :
ee f same, Regnault, Metrical measures ° : :
Bolivian Feet, into English Feet ; : : : . :
“ Varas, into Metres ; : ‘ Fs . :
Bombay, Hourly corrections Periodic Var. Temperature : : 099,
Boothia Felix, Hourly corrections Periodic Var. Temperature 7
Bossekop, Hourly corrections Periodic Var. Temperature. : :
Brussels, Hourly corrections Periodic Var. Temperature 2 : 621,
C.
Calcutta, Hourly corrections Periodic Var. Temperature. 2
Cape of Good Hope, Hourly corrections Periodic Var. Temperature :
Capillary action, correction for English Barometers : :
6 a a ‘“¢ Metrical Barometers, Delcros :
ee ‘«¢ - depression of barometric column, Baily
6c iT ““ “6 66 Deleros
“ 66 66 66 66 Gehler
66 «ce 6é 66 66 Pouillet
Carlsruhe, Monthly corrections Non-periodic Var. Temperature
Castilian Varas, into Metres . ; : : ee A

723
PAGE
426
307
3038
340
340
339
339
261
432
431
442
438
444
252
340
493
709
418
629
666
608
410

444
442
438
496
496
602
088
645
622

602
649
337
338
340
540
339
399
664
494

G24 ALPHABETICAL INDEX.

PAGE
Catharinenburg, Hourly corrections Periodic Var. Temperature ; 636, 637
Centigrade degrees, expressed in equal number of degrees of Fahrenheit . 35
‘“ ee ee es se Reaumur toe:

o Scale, compared with Reaumur’s and Fahrenheit’s, full degrees
from +100° to +50° . é i. AO

6 ‘* eonverted into Fahrenheit, tenths of degrees from 450° to
—54°, and from +100° to +89° 25

‘6 “ dt ‘* Reaumur, tenths of degrees from +40°
to —40°.. : : ‘ 1 E28
Centimetres (rain measure), from English Inches. : 3 220
‘“ ‘“ us ‘© French Inches and Lines . ; - 202
“6 Gs ‘ into English inches : : : . 200
‘6 ‘“ “¢ ‘© French Inches and Lines . : . +200
Christiania, Hourly corrections Periodic Var. Temperature . : . 641
Coefficients of Hourly Corrections, Berghaus f : AMS
Column of air, Height corresponding to a Millimetre, in Metres . Se PU
ui ce same at different Temperatures and Elevations . - 429
ee ss equivalents of Paris Lines, in French Feet . ‘ em aod
6 ‘6 “ ‘¢ tenths of an inch, in English Feet — . - 427
se 3 same at different Temperatures and Elevations . - 430
Comparison of Barometrical differences : ; 5 : 257-261
és ‘“« different Barometric Scales. : : ; 209-252
2 ‘‘ measures of length used in measuring altitudes : 449-500
4 ‘* most important measures of Geographical Distances . 001-532
&¢ Ke a Hs ee Geographical Surfaces. 033—564
‘6 ‘6 as cs “e Length (units) . : - 499
“é cc ie ee Ee Surface (units) . 4 . 564
ae ‘¢ Quantities of Rain-water, different measures . : 200-203

6c “¢ Standards of Length of England, France, Belgium, Prussia,
Russia, India, and Australia ‘ j A SOS
Constants of Greenwich observations, Hygrometric Tables based on them 1387-182
a ‘* Laplace, Hypsometrical Tables based on them . . 347-409
3: “ Regnault, Hygrometric Tables based on them. : 44-129
Copenhagen, Monthly corrections Non-periodic Var. Temperature. 7 669
Correction of Barometrical observations for capillary action . : 330-940)
ae Horary, coefficients of Berghaus . : ; : . 418
‘“ ‘© old French Measures : : : : 3, ae,
6 hypsometric, for curvature and refraction . ; eA:
es of Time from Solar observation, to obtain True time of Gide Oe

Corrections, for Half-sums of Temperatures at Geneva and St. Bernard, Plan-.
tamour : : : ony 420)

ee Horary, to be applied to sbiain Tr ue mean Barometric Precsaee
Greenwich . : : ‘ . 432

- “« to be applied to obtain True mean Barometric Pecan e

Philadelphia . : . ° ° ~ 431

ALPHABETICAL INDEX.

Corrections, Hourly Periodic Var. Temperature : 7 :
a eS ee ‘“¢ Force of Vapor and Relative Humidity
Monthly, for Non-periodic Var. Temperature. :
Cubic foot of air, Weight of Vapor in English measures. :
a = ee Ke ee ce Greenwich Observations
ee Ee Dry and Saturated air compared in weight. ;
‘« metre of air, Weight of Vapor in French measures. :
é¢ “6 ee & ee Grammes, Kaemtz ;
66 oe “ce 6“ 66 66 Pouillet

Curvature and Refraction, Hypsometric correction .

D.
Day, leneth of, at, different Latitudes , ¥ : C
Degrees, Centigrade, expressed in equal number of degrees of Fahrenheit
= ve a SE 5 a Reaumur
as cs scale, compared with Fahrenheit and Reaumur
cc = “* converted into Fahrenheit : :
“ - <s Ee Reaumur . : :
«¢ Fahrenheit, expressed in equal number of degrees of Centigrade
6c 6“ 66 6“ 66 6e Reaumur
‘ - scale, compared with Centigrade and Reaumur
‘6 és “converted into Centigrade ; :
“ ae a ce Reaumur . : :
*— «trom, Time’ . ; ; . : : :
- into Time . ; 3 : : : ;
ec length of, on Meridian and Parallel : ; :
** Reaumur, expressed in equal number of degrees of Centigrade
3 6c 66 6 6c 66 Fabrenheit
“e 6 scale, compared with Centigrade and Fahrenheit
G a “« converted into Centigrade . : :
se ke us a Fahrenheit . : :
‘Squares of . : : ‘ : : :
Deleros, correction for capillary action, metrical : : ‘
‘« depression from capillary action : : : ‘
‘© Hypsometric Tables : ; : : :
‘* normal height of meniscus, in Millimetres . . :
«« Reduction of Metrical Barometer to freezing point . :
' Depression of Barometric column, capillary, Baily. 5 ;
“ “ ec < os Deleros = :
“ “ “ a Ke Gehler . : :
“ “ c a ae Pouillet 2 ;
‘ &6 Sea “correction, English Barometers .
‘ ‘ é a << Metrical Barometers .

Dew point, factors for deducing weight of Vapor.

725

PAGE
979-650
685, 684
654-679

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phe
<« £80
ol ek
~ atg2
<i
. 434
= elk
ot aso
ce ar:
i 10
a awe

28
one
ah Or
é 8
ae
cee
-in 690
‘ajO08
- . 698
iba ceed
Pee
sony allO
aie pata
she
Tis
- .308
. 3840
ses
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sol
aes)
. 840
2 309
2 G09
js toad
- 338
oy SS

726 ALPHABETICAL INDEX.

PAGE
Dew point, from Psychrometer readings : ‘ ; 178, 182
cs Guyot’s Tables, English measures 5 x ree bib
6 Haeghens’s Tables for reducing Relative Bimidig! French
measures ‘ ; ‘ : p ; =e
Dippe’s modified Gauss’s Tables, Hypsometric : ; : . 892
ee Tables, Hypsometric ; ; : 5 BR . 896
Distances, comparison of measures of Geographical . s 501-532
Drontheim, Hourly corrections Periodic Var. Temperature . 2 . 642
Dry air, cubic foot, compared with Saturated air E ‘5 5 al S0)
Dublin, Hourly corrections Periodic Var. Temperature 3 a -a630
E.
Elastic force of Aqueous Vapor, English measures . : : Ses
6“ 66 6 6c French measures. Seo etre : 46
6 66 6c 6c Greenwich constants 5 = meal og
“c ce Vapor, difference in Values . : ; = 2190
“ & «© English Inches, Royal Soe. Tepoet 3 ; . 189
ce oe ‘© in millimetres, by August. ° : = 36
ce os ce He so) 6 Kaemtz : : 2 ASS
ES ue ES es eco Maenus . : : nieeltos
England, standards of Length compared with those of other nations p09
English Barometer and Metrical Barometers compared : : are2lo
cs « old French Barometers compared . : seed
eS se brass scale, to freezing point ; . . = 209
ss me capillary correction : : : ; . 337
“ “ from Metrical . : 5 ; : . 225
ee “ “© old French . : ; ; 2 2 238
ce ce glass or wooden scale, to freezing point . : = 2b
Ee Fathoms from Metres : : : , 2 - 900
as Se into Metres : : 6 : - 000
‘Feet, equivalents of, tenths of an inch j in Barometer : - 427
cs ‘© equivalents of, tenths of an inch in Barometer at different
Temperatures and Elevations : : : . 430
“ ‘* from Bolivian Feet . ; ; 2 5 . “9496
ce coe RP eetior “Viennaes : he : : . 489
ee a “© French Toises’ . : : 3 : . 461
Ke « - « 6Kilafter of Vienna : , : . . 486
“6 foes! Metres i. : : : : : . 466
‘ jee Mexican; Neeta ee : 7 ° : « 495
me eo meeams: Meet : : : : ‘ «| AR
oe «Rhine Feet : : : 4 : . 492
66 (ce oimto, Metres 2. : < - : ; . 481
ee so Paris: Feet 4 : : : ot eae rece oes
ie “¢ 6 Rhine Feet z 4 : : . 483

& 6 ‘“ Feet of Vienna . ‘ ; ; ; . 484

ALPHABETICAL INDEX.

English Hypsometrie Tables, Guyot . : 3 :
“© Inches, from Centimetres (rain measure). s
&G £ *¢ French Inches and Lines (rain measure)
- - ‘¢ French or Paris Lines . : :
“ os ‘¢ Millimetres : : : :
-f ‘into Centimetres (rain measure) : :
co « ‘© French Inches and Lines (rain measure)
SE es ‘¢ French or Paris Lines . : :
a « ‘¢ Millimetres : ~ : :
x Measures for Thermometrical measurement of heights
‘« Statute Miles into Kilometres : : :
es ad ca Austrian Miles,

RC es oe Prussian Miles,

oe e cc German Miles,

us es us Nautical Leagues,

“ oe a French Leagues,

# oe Ke Geographical Miles,

® oe Ke Russian Wersts . : :
ws Square Statute Miles into Square Kilometres :

6 < e Austrian Square Miles,

é¢ ee as ge Prussian Square Miles,

ws se és a German Square Miles,

‘i eS es oc Nautical Square Leagues,

66 “ a se French Square Leagues,

“ a ee C Geographical Square Miles,

‘“ - a ee Russian Square Wersts

oe Yards, into French Toises_ . 5 :

“ ee <¢ . Metres”: : : . :

F.

Factor for computing relative Humidity, Regnault’s constants, English

66

ce

measures.
66 66

measures .

Regnault’s constants, French

Factors for computing force of vapor, from Psychrometrical observations
Oo ’ ’

Fahrenheit degrees, expressed in equal number of degrees Centigrade
of Reaumur

ce

ce

Apjohn’s formula : : : : : :
deducing the Weight of Vapor from the Indications of Dew
Point Instruments. : : : : :

finding Temperature of the Dew Point from the Readings of the

Psychrometer . e : é ‘

6é

66 oe “ce oe

scale, compared with Centigrade and Reaumur, full degrees (from

4+212° to —39°) ; :

°

727
PAGE
d71
200
203
260
258
201
201
257
257
444
026

526
008

558
480
480

126

176

178
34
34

728 ALPHABETICAL INDEX.

PAGE
Fahrenheit scale, converted into Centigrade, tenths of degrees (from +122°
to —76°) , ‘ : ‘ as)
Ks “converted into Reaumur, tenths of degrees (from +122° to
—38°) . § : ; : é .S
Fathoms, English, from Metres : : “ : 5 . o00
6“ oe into Metres ‘ : : : ;: - 900
Feet and inches, from Decimals of a Toise . é ; 3 . 497
«¢ Bavarian, into Metres . s : : . : - 493 |
‘* Bolivian, into English Feet = . : : - - 496 |
cs c ¢ Metres' 7; : : Pols : ; - 496 |
‘* English, equivalents of tenths of an inch in Barometer [ ~ 42a
a me equivalents of tenths of an inch in Barometer at different Tem-
peratures and Elevations . . . : _. 430
6“ “ from Bolivian Feet . a ; ; : - AG
“¢ cs ‘© French Toises . j é ; : > AGL
ee os sc Metres. ome 2 s : S - 466
és ““ ‘¢ Mexican Feet. 3 : 4 - 495
sé us “Paris Feet a : : 5 : AEE
6 cf «¢ Rhine Feet 5 ‘ . : z «5492
“6 os ‘© Vienna Feet : ; 5 : : - 489
és ae «Vienna Klafter . : : : : - 486
‘; Mexican, inte English Feet ; ; ; 3 : . 495
“ BS 66>) Metres nic ; : 3 : . A495
‘** old Spanish, into Metres 7 : ; : : - 494
«© Paris, from English Feet : : : : : . 482
be ce ** French Toises : ; 5 : : . 460
‘ 66 ‘¢ Metres : : 5 “ 5 é . 463
ss Ge «© Rhine Feet 6 : : : : - AD2
cs e “© Vienna Feet : 2 5 : $ » 488
Re eG “Vienna Klafter ; : : . 3 ~ 486°
«© Prussian or Rhine, from Metres : ; < : . 474
‘© Rhenish, from French Toises’ . “ : : : «- 467
** Rhine, from English Feet : . , : 3 - 483
CTs ‘¢ Paris Feet . : > ' . . ~ 478
$f Bs «Vienna Feet “ : . : : - 490
cf «into English Feet : : ; : : . 492
“ 6 “© French Toises : : : : : ste el
6 ee ‘¢ Metres 5 : ; ; : : 3 491
“ & ‘Paris Feet . : 2 : 5 : tae
66 6 «¢ Vienna Feet : : : ; : - 493
‘¢ Vienna, from English Feet : 7 , . : . 484
“ 6c «¢ Paris Feet ‘ : . é : . ALD
“ 6c ‘¢ Rhine Feet ; : . : : - 493
66 se ‘ss Micires” 5 ; : : ‘ - 474

ts “into English Feet : , . . . - 489

ALPHABETICAL INDEX.

PAGE
Feet, Vienna, into Metres. ‘ : : ° ; . 487
“ “¢ ‘Paris Feet : : : : : . 488
“ “ ‘¢ Rhine Feet Dine ; : : : ~ 490
Foot, Decimals of, into Inches and Decimals : - - . 498
6 xa from Inches and Duodecimal Lines : : - 498
« ec into Inches and Duodecimal Lines - ; . 498
Force of Aqueous Vapor, Elastic, Greenwich constants : 137
ce cs ee ee Regnault’s constants, English measures . 78
“ “ ‘6 cs “ oC French measures . 46
~ « ‘* inches, Royal Soc. Report . ; : bed
‘* Vapor, Elastic, in Millimetres, August E : ; . 186
Or ne Be ae Kaemtz < a Lae
ce “ ee se Magnus 2 : soe
6 cs se different values of different authorities 190
ae «and Relative Humidity corresponding to the degrees of
Saussure’s Hair Hygrometer, Gay Lussac : « £93
Force of Vapor, Greenwich, Glaisher ; : ; ‘ 683
France, Standards of Length compared with other nations : Og
Frankfort Arsenal, Pa., Hourly corrections Periodic Var. Temperature 581, 582
Freezing Point, English Barometer, brass scale . . : = - 269
. & te ‘¢ "glass or wooden scale. : 2 2206
“ ‘© Metrical Barometer . F ; : : - 287
“c s¢ old French Barometer 4 . : ‘ - 9390
French Barometer, reduction to Freezing point ; : . 330
Be ee old, compared with English : - : . 238
os rf Rs a Metrical : 3 : . 243
ce Be «s pe Russian ‘ : : «. oe
** Feet, equivalents of Paris Lines, in Barometer , : Saad
‘¢ Inches and Lines (rain measure), from Centimetres . ‘ -, 200
Ee a ¢ ‘ ‘¢ English Inches : - 201
Ee ee Ke oe into Centimetres . ; « 202
Ee “é ge ee ‘¢ English Inches : - 203
“Leagues into Kilometres ; : : - 020
ec Ee “Austrian Miles,
ss 6 “Prussian Miles,
as a “German Miles,
- “ ‘¢ Nautical Miles,
g es “* Geographical Miles,
a ee ‘* English Statute Miles,
c ee «¢ Russian Wersts s ° . . reo
«Lines, into English Inches . : : : : . 260
ce a ‘¢ Millimetres : 3 “ : - - 260
*¢ measures, old, correction for hour of day : Sues
o a ‘« Dippe’s Hypsometric Tables. ‘ : soda
ce ne “* Gauss’s Hypsometric Tables. : : 2096

730 ALPHABETICAL INDEX.

PAGE
French Square Leagues into Square Kilometres ‘ . . - 002
“ ‘ “6 ‘« Austrian Square Miles,
“ “ é¢ «« Prussian Square Miles,
‘ a és ‘* German Square Miles,
“ “ ae ‘Nautical Square Leagues,
‘6 ac 6 “ Geographical Square Miles,
‘ ‘“ “6 “English Square Statute Miles,
“ “6 et « Russian Square Wersts 4 : . oon
‘¢ Toises, from English Yards . . : : E . 480
— coy < nine Meet . ° ° : : , | aon
se ts into Metres ar. . is : ° : - 460
“ «English Feet . . ° . ° . 461
a o,f paris meet : : . : ° . 460
sc “<< RhinedHeet : : : : ° oo) 461
G.
Gauss’s Hypsometric Tables, modified by Dippe : : : 2 396
Gay Lussac, Force of Vapor and Relative Humidity corresponding to degrees
of Saussure’s Hygrometer . . ; : : 7 : ahs
Gehler’s Worterbuch, capillary depression, Barometric column : ooo
Geneva, correction for half-sums of Temperature, Geneva, St. Bernard .. 420
«« Hourly corrections Periodic Var. Temperature ° : ble
‘¢ Monthly corrections Non-periodic Var. Temperature : - 6098
Geographical Distances, Comparison of measures. . : 501-532
ce measures, comparison of : : : : 447-565
‘ee Miles into Kilometres . ° . ° . - 023
ee ee Austrian Miles,
6c 6 Prussian Miles,
ee “ German Miles,
ce cs Nautical Leagues,
o es French Leagues,
6 cs English Statute Miles,
se Ke Russian Wersts ; . Ed pa - 523
ss Square Miles into Square Kilometres . : ; . 595
ee ce Ke Austrian Square Miles,
cs ss i Prussian Square Miles,
ze a German Square Miles,
es ne ce Nautical Square Leagues,
ee ce ee French Square Leagues,
ss cs oe English Square Statute Miles,
*é es ss Russian Square Wersts : : - 955
es Surfaces, Comparison of measures : : : 533-064
German Miles into Kilometres : ; . . . - o14

‘s ee Austrian Miles,

ALPHABETICAL INDEX. T3l

PAGE
German Miles into Prussian Miles,
os e Nautical Leagues,
“ sé French Leagues,
‘6 &s Geographical Miles,
és “ English Statute Miles,
es “é Russian Wersts . : . . . - O14
«< Square Miles into Square Kilometres : . : - d46
“ “c «© Austrian Square Miles,
6 “ «* Prussian Square Miles,
‘6 ‘“ ‘© Nautical Square Leagues,
ee ce ‘* French Square Leagues,
és ‘ ‘© Geographical Square Miles,
“ “ ‘* English Square Statute Miles,
‘“ iirc «« Russian Square Wersts . : rec . 546
Glaisher, Force of Vapor, Greenwich : ‘ : : - 683
cs Psychrometer Tables . : : : ° - 140
ss Relative Humidity, Greenwich : : , . 684
Godthaab, Monthly corrections Non-periodic Var. Temperature : « 679
Gottingen, Hourly corrections Periodic Var. Temperature. 4 eG le
Greenwich, Force of Vapor, Glaisher : : s : - 683
6 Relative Humidity, Glaisher : a" é ; TEGS4:
6 Hourly correction to mean Barometric Pressure . s 452
a «corrections Periodic Var. Temperature . : 624 626
“ oe if < ** Force of Vapor and Relative
Humidity . : 685, 684
‘6 Hygrometric Constants . : : é : 137-182
Guyot’s Hypsometric Tables . : 2 , : “Beer
‘< Psychrometric Tables, English measures. ; ° LES?
‘¢ Relative Humidity from dew point observations : : yo leleh
Ee
Haeghens, Psychrometrical Tables, French measures : » 148
se Relative Humidity and Force of Vapor from Sauasare’s Hygro-
MELEE ea. : : : . : = MLO4
~ Reduction to freezing point, Metrical Barometer . : “2m
Halle, Hourly correction Periodic Var. Temperature : : 3 Oot
Hecla Cove, Hourly correction Periodic Var. Temperature . ; - 589
Helsingfors, Hourly correction Periodic Var. Temperature . : 638, 640
Hobarton, Hourly correction Periodic Var. Temperature : : . 650
Hourly corrections, Berghaus . : ; ; - 418
“e “ for mean Barometric Pressure, Gorrie ch ‘ «432
ce “ a es ca Philadelphia : . 431
“ ee old French measures : : , : . 419

‘6 ‘6 Periodic Var. Temperature ° i ° 079-650

732 ALPHABETICAL INDEX.

PAGE
Humidity, Relative, and Force of Vapor, Haeghens 3 5 SENG A
“ “ “ “ Kaemtz ; : oko
“ ce Factor = English measures”. : : eral 26
“ “ ee French measures. A : Pt ees
‘6 ee from Dew point Instruments. : : Ae Uk
és as ‘* Saussure’s Hygrometer, Gay Lussac : pale
‘6 66 Ee Ke Be Haeghens : en LOA
“6 ee Greenwich, Glaisher : : : - »L40
Hygrometrical Tables . ; : : 37-205
ss ‘© based on Greenwich observations : : « 137,
Ke ‘* constants of Laplace. 2 : . . 349
‘6 ct 2 Reenault . . : 5 a1 246
Hypsometric correction for curvature and refraction . . : - 434
a Tables, Baily (English measures) : - : - 407
ce ‘© — Deleros : E ° : . d49
ee ss Dippe 3 . a : : . 398
met “c ** modified Gauss’s . : : : - 092
“6 “ Guyot . : : : . : ou
6 ‘© Plantamour’s, Bessel . . ; : . 410
Tk
Inches and Duodecimal Lines into Decimals of a Foot : A . 498
‘© English, from Centimetres . ‘ . : : = aZ00
“ “ ‘© French Inches and. Lines : 3 - 2038
“ ‘6 «6 ‘¢ or Paris Lines . ‘ ; é diy 260
“c ‘6 «¢ Millimetres : : : _ sid) setae
“ ee into Centimetres : ‘ : : 5 Ve2 Oil
“ ‘s «¢ French Inches and Lines : : : - sO
“ “ “ ‘¢ or Paris Lines . : 3 i cpeow
“ “ ‘¢ Millimetres : ; 5 : ; 2 seo
«© French, from Centimetres (rain measures) . : : 25200
“ sé ‘* English Inches (rain measures) : . » 0 208
e “3 into Centimetres (rain measures) . : : 202
‘6 4 ‘¢ English Inches (rain measures) ; : - 203
India, standard of Length compared with other nations : : Og
Insolation, length of, for any given Latitude . . f ean vale
K.
Kaemtz, Elastic Force of Vapor, in Millimetres z : : Ss
“ Reduction of old French Barometer to freezing point : OU)
‘© Relative Humidity, corresponding to degrees of Saussure’s Hygro-

meter 3 5 ‘ j : HeeLOS

«© Weight of Vapor, in Grammes in Cubic Metre of Air- . = 192

ALPHABETICAL INDEX.

Kara, Straits of, Hourly correction Periodic Var. Temperature :
Kilometres into Austrian Miles : : : : :
oe ‘* Prussian Miles,
US ‘© German Miles, _
ee ‘* Nautical Leagues,
a ‘© French Leagues,
cl ‘Geographical Miles,
es ‘¢ English Statute Miles,
66 “© Russian Wersts fees , A 3 ‘
2 Square, into Austrian Square Miles : : ;
ec Ee ‘¢ Prussian Square Miles,
co ce ‘* German Square Miles,
Sate! os ‘Nautical Square Leagues,
ce Or ‘© French Square Leagues,
ce ee “* Geographical Square Miles,
ee . ‘* English Square Statute Miles,
< - ‘Russian Square Wersts : 2 3

Kinfauns Castle, Monthly correction Non-periodic Var. Temperature
Klafter of Vienna, into English Feet

se Be “¢ Metres : : ie : :

ES ee “« Paris Feet . : lene es :
Kremsmunster, Hourly correction Periodic Var. Temperature :

L.

Laplace, constants of Hypsometric Tables. 3 : :
Latitude, length of Insolation for any given . : : :
Latitudes, length of a degree at different :

ee of Principal Observatories : : : :

- surtaces at different : : 3 A ,
Leagues, French, into Kilometres. ‘ 2 3 :

6 66 ‘¢ Austrian Miles,

66 se ‘¢ Prussian Miles,

“ ee ‘* German Miles,

“¢ ae ‘* Nautical Leagues,

66 m ‘« Geographical Miles,

és &é ‘* English Statute Miles,

és ts ‘* Russian Wersts 2 : :

“6 Nautical, into Kilometres . : : 3

6 “ ** Austrian Miles,

“ “ «¢ Prussian Miles,

“ “ “German Miles,

‘6 ‘6 ‘© French Leagues,

‘“ ‘6 ‘< Geographical Miles,

““ 6 ‘« English Statute Miles,

3 66 ‘6 Russian Wersts 5 d ‘ .

733

PAGE
Peo
moe
. 3905
eet
Coo
i. 676
. 486
- 485
- 486
eile)

349-407
se adgdelll

- 698

. 689

>; 408
«520
520

ee Oey

aa COR ¢.

734 ALPHABETICAL INDEX.

PAGE
Leagues, French Square, into Square Kilometres. : : - 902
ce ce & ‘¢ Austrian Square Miles,

ae ee 4 ‘¢ Prussian Square Miles,

ce es KG ‘¢ German Square Miles,

ce a ae ‘© French Square Leagues,

ke se a ** Geographical Square Miles,

‘“ “ “6 *¢ English Square Statute Miles,

ce ce ce *¢ Russian Square Wersts ; 3 . o02

cs Nautical Square, into Square Kilometres . = ° - O49

es ee és *« Austrian Square Miles,

oc “é &e ‘¢ Prussian Square Miles,

cs ks oo ‘* German Square Miles,

“ ce a ‘«’ French Square Leagues,

ie e ce ‘© Geographical Square Miles,

6 & = ‘¢ English Square Statute Miles,

“a 2 se ‘¢ Russian Square Wersts : ; . od49
Leith, Hourly correction Periodic Var. Temperature . : 633, 634
Length of Insolation, at different Latitudes . P ; : sealed

«¢ Standards, comparison of : ‘ ; . e ze cOg

‘« Table for comparing different measures of _ . : : . 409
Lengths of a degree, at different Latitudes. ; : : - 69S

s used in measuring Altitudes, comparison of . : ; 449-500
Lines, French, and Inches, from Centimetres (raia measure) : . 200

gs % fe *¢ English Inches (rain measure) ‘ oe aul
ee cs 6 ‘¢ into Centimetres (rain measure) 7 - 202
£ a és es ‘** English Inches (rain measure) : - 203
“ «or Paris, from English Inches < : . weer tit
ee ee ee ‘¢ Millimetres . 4 : 5 «1 Zag
‘¢ Paris, from Russian Half-Lines ; : : : . 261
« ‘¢ into English Inches. : : A = «200
“6 Ee ‘© Millimetres : : : “ ° - 260
‘* Russian Half, into Millimetres : 3 5 A | oll
Re ee es ‘© Paris Lines : 5 : . . 20L
London, Monthly corrections Non-periodic Var. Temperature ° = Oto
Longitude in Arc, converted to Time : 5 ; . - 693

‘6 « Time, converted to Arc : : : e en Doe

Longitudes of Principal Observatories : ° : . - 689
M.
Madras, Hourly corrections Periodic Var. Temperature : : 597, 601

“© Monthly corrections Non-periodic Var. Temperature : - 604
Magnus, Elastic Force of Vapor in Millimetres : : . - 188
Makerstoun, Hourly corrections, Periodic Var. Temperature : - 635

Matoschkin Schar, Hourly corrections, Periodic Var. Temperature . . 644

ALPHABETICAL INDEX. Micxe

PAGE
Measures of Geographical Distances . : : : , 501-531
6 Ke ae ue comparison of units ; 7 - O32
‘“ 6 ct Surfaces . ; ‘ . : 0383-563
«ec ‘© Length, Comparison of units. : ; E ae o0
é one used in measuring Altitudes, Comparison of — . 449-500
a: ‘* Surface, Comparison of units. e : - O64
Melville Island, Hourly corrections Periodic Var. Tenyceatiee ; 1.089
Meniscus, normal Height of, in Millimetres . : : : goat
Meridian, Lengths of Degree of q ; : : : ogo
Metres, from Bavarian Feet . : 3 ‘ ; ; - 493
66 « Bolivian Feet . : : F c : 2, sO
“ “6 Co Wards. : : ; : 3 - 496
“ ‘English Fathoms : : : : : - 900
‘6 6“ cr Peety s: ; : : ; 4 48
“ «“c key, earcce, ‘ : : : : - 480
“ ‘Feet of Vienna : ; : : : = 34070
és <~ Prench Toises. . : : A ‘ : . 460
‘6 « Klafter of Vienna : : 2 , 4 ~ 485
“ “ 6Paris Feet : : . : Bids : - 476
ee “Mexican Feet . : . f : : ua
‘“ ee c Varas : : : : te eo
cs * old Spanish or Castillian Varas ‘ Z ; i Ags
és “ “c 6 as Feet . : : ‘ « 494
‘“ «¢ Rhine Feet : : : ; 5 : ~ 491
‘* into English Fathoms : : : : : - 900
“ “c = Bectimae: : : : : q . 466
“c « Feet of Vienna . : : : : ; 1 AGE
“ « French Toises . 2 : : : : - 462
ee “ Paris Feet : ; : E é ») 463
ec ‘© Rhine or Prussian Feet . ; ‘ ‘ - A4G4
‘© Height of Column of Air corresponding to Mee in Barometer. 427
ee same at different Temperatures and Elevations —. . » 429
Metrical Barometer,’ Capillary corrections, Delcros . ; : 2388
‘6 = from English . : Ve 2 . reilly
se “c «old French : : g : Be
6 “ sc Russian 3 5 BE A oh OAT
“ “c into English =. : : - : 2D
6 6 “old French p é . Z 22 931
‘“ G zeicion to Freezing point, Deleros’. 7 - 281
“ “c aa ge g¢ Haeghens . ae er
66 Measures, Delcros Hypsometrical Tables. ‘ é . 849
“ “ Plantamour’s Hypsometrical Tables : : - ANG
“ cé Regnault’s Barometric pressures, corresponding to Tem-
peratures of boiling water, Moritz . , . 442

“ 6“ same, English measures Z , Br AdAl

736 ALPHABETICAL INDEX.

PAGE
Mexican Feet into English Feet ; . . . . - 495
6 co 66) Metres aa. : : . : ° - 495
“ Varas into Metres . . . . - : - 495

Milan, Monthly corrections Non-periodic Var. ‘Temperature : 656, 657
Miles, Austrian, into Kilometres 3 : . A 2 - 808

AG 6 ‘© Prussian Miles,

“ “ ‘¢ German Miles,

6“ “< ‘¢ Nautical Leagues,

“< 66 « French Leagues,

66 66 6“ Geographical Miles,

“ “<6 ‘© English Statute Miles,

“ “ ‘¢ Russian Wersts . : : ° - 9508

‘¢ Prussian, into Kilometres | : . : : i - oll

““ 6“ « Austrian Miles,

“ “ “ German Miles,

‘6 ‘6 ‘Nautical Leagues,

“ “<6 “ French Leagues,

6“ és ** Geographical Miles,

« “6 “English Statute Miles,

“ 6 ‘“* Russian Wersts . . . . . » ou

“German, into Kilometres . . . . : - 514

“ & “ Austrian Miles,

“<6 “ «© Prussian Miles,

““ ce ‘« Nautical Leagues,

‘6 ‘6 ‘¢ French Leagues,

‘ “= Geographical Miles,

“6 6 ‘« English Statute Miles,

‘ és «¢ Russian Wersts . opin bean < : : - 514

‘© Geographical, into Kilometres . : . : : ~ 9293

“e “ «Austrian Miles,

“ 6 ‘¢ Prussian Miles,

“ “ ‘“* German Miles,

66 6 ‘« Nautical Leagues,

‘6 “ ‘“ French Leagues,

“ “ ‘« English Statute Miles,

66 “ ‘Russian Wersts ; ; : . » 928

‘ Enelish Statute, into Kilometres . . ° : - 926

éé ‘ 6 ‘¢ Austrian Miles,

‘6 és “ «« Prussian Miles,

&< “ “ ‘“* German Miles,

és ‘ ‘ ‘Nautical Leagues,

“ 6 “ ‘< French Leagues,

é< ““ 6“ “© Geographical Miles,

“ “ “ “© Russian Wersts . : : ‘ . 926

‘* Austrian Square, into Square Kilometres : . . » 9540

cs ce es ‘¢ Prussian Square Miles,

ALPHABETICAL INDEX.

Miles, Austrian Square, into German Square Miles,

“ Es ms ‘© Nautical Square Leagues,

& “ ee « French Square Leagues,

‘“ “ es ‘© Geographical Square Miles,

“ “ “ ‘© English Square Statute Miles,

“ Sree curt cs «© Russian Square Wersts . ‘

«¢ Prussian Square, into Square Kilometres : :

“ us ee ‘« Austrian Square Miles,

a es ae ‘© German Square Miles,

“ es ef ‘« Nautical Square Leagues,

“ e oe ‘French Square Leagues,

cc a Ce ‘« Geographical Square Miles,

‘“ ee es ‘© English Square Statute Miles,

“ ‘6 ce «© Russian Square Wersts . ;

“© German Square, into Square Kilometres : :

rn. ee ae «Austrian Square Miles,

ee <6 ue «© Prussian Square Miles,

Es s - ‘© Nautical Square Leagues,

Ee $s ee ‘© French Square Leagues,

Ee e ue ‘© Geographical Square Miles,

ee “ se «© English Square Statute Miles,

es “s ‘~ Russian Square Wersts . :

‘Geographical Square, into Square Kilometres . ;

re cs ae ** Austrian Square Miles,

a a ss ** Prussian Square Miles,

. a = ‘© German Square Miles,

es Ks ‘* Nautical Square Leagues,

. es «e *« French Square Leagues,

% a ee ‘English Square Statute Miles,

a “ oe «© Russian Square Wersts :

«English Square Statute, into Square Kilometres z

S oe es os ** Austrian Square Miles,

es 4 ee “ ** Prussian Square Miles,

“ % se pe * German Square Miles,

Ss Gs “ rs *« Nautical Square Leagues,

< eS a «French Square Leagues,

. ss us e ‘* Geographical Square Miles,

we ch a id ** Russian Square Wersts .
Millimetre, Height of Column of Air corresponding to a :

ec

same at different Temperatures and Elevations

Millimetres, Elastic force of Vapor expressed in, by August

ee

ce

ee

ce

ae

oe

ee

“e

se

ce

from English inches

ee

66 “ Kaemtz

&c ‘¢ Magnus

French or Paris Lines ; : c

737

PAGE
- 940
ete)
ae epAs
a Ob
. 546
Lt)
TET aay
A008
. aos
Seles
x 429
186
sues
so SBS
Pot
eu

738 ALPHABETICAL INDEX.

PAGE
Millimetres, from Russian Half-Lines . 2 3 eZ bil
66 into English Inches A : : i : eS
ee ‘¢ French or Paris Lines : . 5 : - 209
6 normal Height of Meniscus, Deleros . : ; SMSO,
Montreal, Hourly corrections Periodic Var. Temperature , . 586
Moritz, Tables for Barometric pressures corresponding to Temperatures of
Boiling water : : : Mi : : - 442
«¢ same, in English measures. , 2 . . . 444
Miihlhausen, Hourly corrections Periodic Var. Temperature : - 623
Munich, Hourly corrections Periodic Var. Temperature 2 : 616, 617
IN:
Nautical Leagues into Kilometres. : 5 . 3 =) aoa
OG ge ** Austrian Miles,
6 << “¢ Prussian Miles,
“ “ ‘“* German Miles,
zs oe ‘ French Leagues,
“ «6 ‘Geographical Miles,
6“ ee ‘* English Statute Miles,
ae & «Russian Wersts . 4 : ° A yaorkia
- Miles into Kilometres : : : . : - Jo
c <¢ ¢ Austrian Miles,
“ <«¢ 6 <¢—S Prussian Miles,
“ << «© ~6German Miles,
a “¢ 6 Nautical Leagues,
6 ce) 66) Brench: Leagues,
“ « « English Statute Miles,
“6 «Russian Wersts . ; A ; canoe
rc Square Leagues into Square Kilometres. : : . 949
‘6 bs Kc ‘* Austrian Square Miles,
és ‘6 gs “© Prussian Square Miles,
66 ue cs ‘© German Square Miles,
6 BC 3 *« French Square Leagues,
« Re ee ‘* Geographical Square Miles,
“ ‘6 ee ‘« English Square Statute Miles,
‘6 ce ue ‘* Russian Square Wersts : ¢ . 049
‘“ «« Miles into Square Kilometres : ; 5 . 009
“ ‘6 «Austrian Square Miles,
“ “ «¢ © Prussian Square Miles,
‘“ “ “=~ German Square Miles,
«“ ‘6 «© «French Square Leagues,
‘6 ‘ “« «Nautical Square Leagues,
“ ee «« «English Square Statute Miles,

‘6 $6 ‘< ~—- Russian Square Wersts . : : - 909

ALPHABETICAL INDEX. 739

PAGE
Non-periodic Variations of Temperature, Monthly Corrections . 651-679
Nertchinsk, Hourly corrections Periodic Var. Temperature . : 604, 605
O.
Observatories, Positions of Principal : 7 : : . 689
iE
Padua, Hourly corrections Periodic Var. ‘Temperature : : 20Lk2
Palermo, Monthly corrections Non-periodic Var. ‘Temperature . 609
Parallel, length of degree of . : : 2 : : . 693
Paris Feet from English Feet : : e : : . 482
ee cts BrenchLoises : : , 2 : . 460
(se Metres o : : : ; : . 463
= ke «© Rhine Feet . : : : é : onto
os “ «Vienna Feet s : : ; : . 488
& eo) a Vienna, Klatter : : : : 2 . 486
‘* Lines from Russian Half-Lines : ; : : ee el
. «into English Inches ‘ : : : , = 200
a en re Mallimetres. : 3 : : .' 260
‘* Monthly corrections Non- serpaie Var. Temperature . : omecorek
Peking, Hourly corrections Periodic Var. Temperature : : 603, oUe
Periodic Variations of Temperature, Hourly Corrections. 079-650
ss “s Force of Vapor and Relative Humidity, Hourly Cor-
rections 3 : ; : z 683, 684
Philadelphia, Hourly corrections Periodic Var. Temperature : 079, d80
Plantamour, Corrections for Half-sums of Temperatures at Geneva and St.
Bernard : s : : : - 420
a Hypsometric Tables, Bessel 2 : : : ALO
Plymouth, England, Hourly corrections Periodic Var. ‘Temperature . 619, 620
Pouillet, Depression of Barometric column due to capillary action. - 339
“© Weight of Vapor in Grammes in Cubic Metre of Air : Phos
Prague, Hourly corrections Periodic Var. ‘Temperature : 617, 618
Pressure, Barometric, corresponding to Temperatures of Boiling water 438-445
Prussia, standards of Length compared with other nations . 7 a e0g
Prussian Miles into Kilometres : : : . : se old
se « 6% Austrian Miles
6c “¢ = 6) German Miles,
“ «~~ Nautical Leagues,
“ «6 «French Leagues,
a « « ~ Geographical Miles,
= « <« KEnelish Statute Miles,

6c 6 ‘© Russian Wersts . : ; A u aeeoilel!

740 ALPHABETICAL INDEX.

PAGE
Prussian Square Miles into Square Kilometres, : : : GAS

‘ “6 wc «Austrian Square Miles,

“ ss be epee ‘¢ German Square Miles,

6 6“ 66s ase «© Nautical Square Leagues,

- 6 66 ame 66 «© French Square Leagues,

co “6 bees neice “© Geographical Square Miles,

“ ‘“ be ues «English Square Statute Miles,

“ ‘6 Coa lane ** Russian Square Wersts . : -. OAS
Psychrometer, Factors for finding Dew point from readings of : 178-182
Psychrometrical observations, Factors for deducing Force of Vapor, Apjohn 176

ee Tables, Glaisher, Greenwich constants : : TAO
ee ‘© Guyot, English measures. ; ; SRD
ee «© Haeghens, French measures : . eae
R.

Rain measure, Centimetres, from English Inches : . 5 «9201
“ ‘“ ‘6 *¢ French Inches and Lines . z «2202
“ ‘6 ue into English inches : : : <"=200
‘6 ee 66 «© French Inches and Lines. : . 200
“ “ English Inches, from Centimetres ; f é . 2200
‘ “ we ae ‘© French Inches and Lines 7 - 6208
« “6 és ee into Centimetres ‘ : : se ZOW
‘6 és 66 Ke ‘¢ French Inches and Lines 2 CeO
6“ “ French Inches and Lines, from Centimetres . : » 200
“ ‘6 <6 a ac «¢ English Inches : =o 201
‘6 66 ‘“ pes ‘© into Centimetres . ‘ An 0)
‘“ ‘6 sé ee a «© English Inches : eS
Ratisbon, Monthly corrections Non-periodic Variations of ‘Temperature 661, 662
Reaumur degrees, expressed in equal number of degrees of Centigrade . 35
‘6 “ os e Be ee Fahrenheit ej ene

ee Scale, compared with Fahrenheit and Centigrade, full degrees
from +80° to +40° ; . ; 3 a Le

66 “converted into Centigrade, tenths of degrees from + 40° to
== ACs ie : : : Be

“ ES “ ““ Fahrenheit, tenths of degrees from +40°
to;—4A02% : ; : “1 oO)
Reducing Barometer to Sea Level. : : : : . 426
Refraction and Curvature, Hypsometric correction . : : . 454
Regnault’s Barometric Pressure, equivalent to Temperature of Boiling water 438

cs es cS “¢ to Temperature of Boiling water
English measure, Moritz . 444

‘6 c a es to Temperature of Boiling water
Metrical measures, Moritz - 442

“ Constants, Hygrometric Tables based on them. a 44-129

ALPHABETICAL INDEX.

Reikiavik, Monthly correction Non-periodic Var. Temperature :
Relative Humidity, corresponding to degrees of Saussure’s Hair Hygrometer
é6 se corresponding to degrees of Saussure’s Hair Hygrometer,
Gay Lussac .. ; : : : ‘
ee . deduced from Indications of Saussure’s Hair Hygrometer,
Haeghens : : : : :
a cs Factor = English measures, Regnault’s constants
6 es - French measures, Regnault’s constants ;
“ oe from Dew point instruments : 2
ce ay ss - Haeghens . : :
Rhine Feet into English Feet . : : : :
a a Feet of Vienna : . : :
ée a French Feet : : ; 2
ee es Sra te OISes . :
es es Metres ‘ : :
Rio Janeiro, Hourly corrections Periodic Var. ‘Temperature . 590,
Rome, Hourly corrections Periodic Var. Temperature 7 .
Russia, standards of Length compared with other nations
Russian Barometer compared with Metrical
Ee 2 ‘old French
‘* _Half-Lines converted into Millimetres s 3
Ee es “Paris Lines
Russian Wersts into Kilometres . : 3
sé 6s ‘+ Austrian Miles,
Ke ae ** Prussian Miles,
6 ee ‘“ German Miles,
Ee ee ‘* Nautical Leagues,
ee s ‘« French Leagues,
sé es ‘* Geographical Miles,
+ te ** English Statute Miles. s z s
** Square Wersts into Square Kilometres j
“é a - “Austrian Square Miles,
ts ee e ‘* Prussian Square Miles,
és & - ‘* German Square Miles,
‘s e cs ‘** Nautical Square Leagues,
“ ‘ te ‘** French Square Leagues,
‘ = es ‘* Geographical Square Miles,
ss * ee ** English Square Statute Miles.
S.
Salem, Monthly corrections Non-periodic Var. Temperature . é
Salzburg, Hourly corrections Periodic Var. Temperature 3
Salzufien, Hourly corrections Periodic Var. Temperature.

741
PAGE
679
195

195

194
126

72
111

66
492
493
492
491
491
O91
611
709
247
252
261
261
029

529
o61

561

67
616
630

742 ALPHABETICAL INDEX.

PAGE
Saturated Air, Cubic foot, compared with Dry Air . : ; . 180
Saussure’s Hygrometer, for deducing Relative Humidity from indications of,
Haeghens . , ; ; : » Loe
Ee ee Force of Vapor and Relative Humidity, correspond-
ing to degrees of . : : : . 193
‘6 ea Relative Humidity, corresponding to degree of,
Kaemtz . : : : : o 29S
Schwerin, Hourly corrections Periodic Var. Temperature. : - 622
Sidereal Time, from parts of Equator in Arc : - ; - (604
c s¢ into mean Solar Time : , : a OAS)
es ce “« parts of Equator in Arc . : ; : - 695
Sitka, Hourly corrections Periodic Var. Temperature : : of OST
Solar observations, Correction of Time to obtain True Time of Clock eee
‘< Time, mean, into Sidereal Time : : : : ay Oe
Spanish old or Castilian Varas, into Metres . : 5 : 5 AGU
ee “© Feet into Metres : . : A aS 2-1 494
Square Austrian Miles, see Miles, or é : : ¢ . 540
‘¢ English Statute Miles, see Miles, or . : ; : . 9098
*¢ French Leagues, see Leagues, or ‘ : . : - 902
‘¢ Geographical Miles, see Miles, or. : ‘ : « 555
‘¢ German Miles, see Miles, or : ‘ . : - 546
«¢ Nautical Leagues, see Leagues, or . , es ; . O49
‘¢ Prussian Miles, see Miles, or ‘ x 2 : soo43
‘¢ Russian Wersts, see Wersts, or ; : z x ood
Square Statute Miles, English, into Square Kilometres : : - 5098
6“ “6 ‘6 66 «« Austrian Square Miles,
ee be 4s ce «« Prussian Square Miles,
# 8 . gs ““ German Square Miles,
ES eee once ct «Nautical Square Leagues,
RS ce 3 a «« French Square Leagues,
EC & ce ce ‘* Geographical Square Miles,
Ke Re ce 4: ‘* Russian Square Wersts . e - 558
Statute Miles, English, into Kilometres : ; : : - 826
6c “c 3 «¢ Austrian Miles,
Be ce e «Prussian Miles,
“e 4 oe ‘¢ German Miles,
4 cr oe «« Nautical Leagues,
ce ee 2 ‘¢ French Leagues,
x 2 ss ‘‘ Geographical Miles, ;
ke a ue ‘* Russian Wersts ° : ; . 526
Stettin, Hourly corrections, Periodic Var. Temperature a : 2) soot
St. Bernard and,Geneva, corrections for Half-sums of Temperatures, Planta-
mour : : : : : : 2 : . 420
St. Bernard, Hourly corrections Periodic Var. Temperature . : . 614

St. Helena, Hourly corrections Periodic Var. Temperature . : . 649

ALPHABETICAL INDEX. 748

PAGE
St. Petersburg, Hourly correction Periodic Var. Temperature ° 637-639
Stuttgart, Monthly corrections Non-periodic Var. Temperature : . 663
Sun, correction of Time by observation of, to obtain True Time of Clock . 697
Surfaces, comparison of measures of Geographical. : : 534-563
«6 Ge units of measures”. : : 2 . 564
‘Tables for computing Terrestrial . . : : etOe
T.

Temperature, corrections for Half-sums of, at Geneva and St. Bernard,
Plantamour . ; : : . 420
- Hourly corrections Periodic Variations, Amherst ; . 592
f - se ke ee Apenrade : - 632
o e & a Athabasca Lake - 9589
a SS es ae “ Berlin s ooze
Sear “ é é< “ Bernaul : 606-608
Ee ae + ae es Bombay : 099, 602
cs ss uc LG - Boothia Felix - 088
_ a ce ue K Bossekop i . 645
“s “c “ 6 “ Brussels : 621, 622
a “ e we “ Calcutta . - 602
e gs & Es 4 Cape of Good Hope . 649
« So oo ct & Catharinenburg —_ 636, 637
“ oe c: a a Christiania. OAL
ue se s ee as Drontheim . - 642
= os - ae ss Dublin ; ~ 635
ke ee “c a e Frankfort Arsenal 581, 582
se ec me a - Geneva : + BOS
6 a “ Ke = Greenwich . 624, 626
ce Ce as os 5 Gottingen ; ~ 628
v “ O ee a Halle . : - 627
ee “c ‘ te a Hecla Cove . 2 1989
as op ue ee a Helsingfors . 638, 640
ee Se Ke ee ee Hobarton . - 650
“c ' a eA a & Kara, Straits of . 643
es ke es gs Kremsmunster 2 #Ollo
« ee o ee a Leith . : 633, 634
- ee Be ec ae Madras : 9297, 601
ee O4 ee ss Makerstoun . - 635
4 ee au es iS Matoschkin Schar . 644
Hy es es “s % Melville Island - 989
“t ce ce e as Montreal : « 9586
ee es He Miihlhausen . - 628
ae Be ae cs a Munich 2 616, 617

e & es a ee Nertchinsk . 604, 605

744

ALPHABETICAL INDEX.

PAGE
Temperature, Hourly corrections Periodic Variations, Padua 3 . 612
“ “ 6“ “< “ Peking : 603, 604
66 66 66 66 66 Philadelphia . o79, 5080
6 ‘6 6 6 a Plymouth, England 619, 620
‘6 6“ “ ‘“ ‘6 Prague : 617, 618
“ “ ““ “6 “6 Rio Janeiro . 090, 591
6 6 “ “6 se Rome ; 611
6 “ “ ‘ « Salzburg ‘ 616
« “ ve ss “ Salzuflen : - 21600
6 6 6 6 os Schwerin 5 «OLS
tc s 6 “ 6 Sitka . 2 . 087
é 6 “ ‘ 66 Stettin ; =) 631
s ‘ 6 ss “ St. Bernard . = 614
és ‘s « ss ‘6 St. Helena . “eros
és és ss “ 66 St. Petersburg 637, 639
ec “ ‘s os ts Vitis: ; . 603
“< 6 ss ss ‘Toronto : 383-586
te 6“ 6 6s “s Trevandrum . 995, 596
‘ ‘ “ ss 66 Utrecht : . 624
re ce és és Washington . . 1.009
ps Monthly corrections Non-periodic Variations, Albany . <2 ROME
es ‘< “ ‘6 ‘“ Berlin . 666-668
és ‘“ ‘6 “ v6 Carlsruhe 664, 665
és 6 6s 6s 6s Copenhagen . 669
66 ‘6 s « Geneva 658, 659
sc “ 6 “ 6 Godthaab oOo
y és 6s 6 “s Kinfauns Castle 676
53 ““ 6 és 6s London 674, 675
“é ée eG & 6 Madras . 654
‘ 66 vs ‘“ ‘ Milan . 656, 657
“ 66 ‘ bs ee Palermo - 695
6s és “ “s ce Paris OTE
“6 “é és & “s Ratisbon 661, 662
vc ‘< “ 6 << Reikiavik OR
‘ “ “ 6s “ Salem 1 OFS
‘6 te “< “ és Stuttgart 665
fet G< 66 6s 66 Tornea 676, 677
‘< ‘ 6 6é ee Vienna 660, 661
és ‘“ ‘6 ‘ a Zwanenburg 672-674

$s of Boiling Water, Barometric Pressures corresponding to,
Moritz, English measures : Petar:

‘ “ ‘6 ‘* Barometric Pressures corresponding to,
Moritz, Metrical measures : . 442

“ 6 “ ‘“ Barometric Pressures corresponding to,
Regnault : : : «4a8

ALPHABETICAL INDEX.

740

PAGE

Temperature of Dew point, from Psychrometrical readings 178-182

“f Non-periodic Variations, Monthly corrections 651-679

a Periodic Variations, Hourly corrections ; 579-650

Terrestrial Longitude in Arc, from Time : ‘ : 7 69D

e ee os into Time : : a) OOo

fs Surfaces, Tables for computing. ‘ : » «06

Thermometric measurement of Heights : ; 435-440

Thermometrical Tables : : . 3 . 8-35

Tiflis, Hourly correction Periodic Var. Temperature - 608

Time correction of Solar observation to obtain True Time of clock oo Oui

** mean Solar, into Siderial Time : pods

“ Siderial, from parts of Equator in Arc ; : - 693

‘6 into mean Solar Time ; : ; : 2 O96

ke ‘parts of Equator in Are . ; : ony O00

Toise, Decimals of, into Feet and Inches : ‘ : : dor

« =French, from EnglishYards . : : ; . . 480

& 3 «© Rhine Feet : : : : ae ao

ce ti ESM rene is pong ; : : : . 462

“ se «Paris Feet : fs : ‘ : . Ald

6 Ke into English Feet : ‘ : : , - AGE

ve a ce Metres > : : : : . 460

es a «¢ Paris Feet : : : ‘ . 460

“ “ «© Rhine Feet , : 2 : : . 461

Tornea, Monthly corrections Non-periodic Var. Temperature . 676, 677

Toronto, Hourly corrections Periodic Var. Temperature : 383-586

Trevandrum, Hourly corrections Periodic Var. Temperature : 095, 596

Tropic hours of daily Variation at Halle : ; 2 : - 425

True Time of clock correction for Solar observations ; : Oo

ee
Utrecht, Hourly corrections Periodic Var. Temperature : : - 624
We:

Vapor, comparison of Dry and Saturated Air (Greenwich) . F > 180

«Elastic force of, in French measures, Regnault : : ree G

“ ‘6 ‘6 ‘* Greenwich constants : : : ood

‘“ ‘6 a ‘in Millimetres, August =. - 186

6 “ “ “ ce Kaemtz . ; 2 >, 188

“ 6 ms “ ee Magnus. ; : Ses:

‘6 ‘6 66 es Cubic Foot of Saturated Air. : » WoO)

‘“ 66 " is th Ks . ‘“¢ Greenwich constants 179
“Force of, and Relative Humidity corresponding to degrees of Saussure’s _

Hygrometer, Gay Lussac ; : : oes

746 ALPHABETICAL INDEX.

Vapor, Forée of, different values of different authorities
be cs Erglish measures, Regnault , . :
és ks Greenwich, Glaisher, Hourly corrections Periodic Variations
& ce Inches, Royal Society
“ Weight of, in Cubic Foot of air
cs ce ee Metre of air :
4 % Factor for deducing from indications of déty acini instru-
ments . . . : .
: “ in Grammes, in avis Metre of air, Kaemtz ; ;
ce 6c oe 66 66 ce Pouillet é
Vienna, Feet of, from English Feet . z ; : ;
ge ce «< Pars Feet 7 ; 2 , : ‘
Ee ae “Rhine Peete : : : : :
cs 4: into English Feet . : : 2
ce oe cc Metres! A : : zy : :
é¢ se ‘co Paris eet : : : ‘ :
“ sc «¢ Rhine Feet : : : . 7 :
« Kilafter of, into English Feet : . : : :
as ce se Metres ; ; : :
oe cs <tc Paris Meet s :
Vienna, Monthly corrections Non-periodic Var. Temperature : 660,
Varas, Bolivian, into Metres . . : . 3 ;
«© Mexican, into Metres . : s : . :
“¢ old Spanish or Castilian, into Meine : : ,
W.
Washington, Hourly corrections Periodic Var. Temperature . :
Water, Temperatures of Boiling, and corresponding Barometric Pressures,
Moritz, English measures ;
ce Se sé ‘* and corresponding Barometric Pressures,
Moritz, French measures :
“ 66 6 6 and corresponding Barometric Pressures,
Regnault , : : :
Weight of Cubic Foot of Dry and Saturated Air. : ; é
‘6 Vapor, Factors for deducing, from Dew point indications .
‘“ 6 ot Ee «Greenwich . :
“ «in Cubic Foot of Air, Regnault
“ “ “ Metre of Air, Regnault . : :
“ «in Grammes in Cubic Metre of Air, Kaemtz :
oc 6c 66 6c 6“ “ce “* =Pouillet 5 -
Wersts, Russian, into Kilometres z 5 i , 4
“ ‘6 «© Austrian Miles,
6 “ ‘© Prussian Miles,

“ ‘“ ‘© German Miles,

PAGE
190
78
685
189
150
74°

179
192
192
484
479
493
489
487
488
490
486
485
486
661
496
495
494

444

442

438
180
tao
179
130

74
192
192
029

ALPHABETICAL INDEX.

Wersts, Russian, into Nautical Leagues,

oe oe

oe oé

se se

ae ee

oe ee

se ce

ee ee

se ee

oe

“e

“ec

se

66

ec

oe

“ee

French Leagues,
‘¢ English Statute Miles . :
Square, into Square Kilometres.

ce

ce

e

ce

oe

66

66

Austrian Square Miles,
Prussian Square Miles,
German Square Miles,
Nautical Square Leagues,
French Square Leagues,
Geographical Square Miles,
English Square Statute Miles

NG

Yards, English, into French Toises . : :
‘© Metres

ee ce

Zwanenburg, Monthly corrections Non-periodic Var. Temperature

. . .

Z.

TAT
PAGE

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