Skip to main content

Full text of "Smithsonian miscellaneous collections"

See other formats


^0^ 



/i^; 



J^ 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 

VOLUME 86 (WHOLE VOLUME) 



SMITHSONIAN 

METEOROLOGICAL 



TABLES 



[based on guyot's meteorological and physical tables] 



FIFTH REVISED EDITION 

(Corrected to January, 1931) 




(Publication 3116) 




CITY OF WASHINGTON 

PUBLISHED BY THE SMITHSONIAN INSTITUTION 

1931 



^ 






SMITHSONIAN 



MISCELLANEOUS COLLECTIONS 



VOL. 86 




"EVERY MAN IS A VALUABLE MEMBER OF SOCIETY WHO. BY HIS OBSERVATIONS. RESEARCHES. AND 
EXPERIMENTS. PROCURES KNOWLEDGE FOR MEN"— SMITHSON 



(Publication 3215) 



CITY OF WASHINGTON 
PUBLISHED BY THE SMITHSONIAN INSTITUTION 

1933 




THE SCIENCE PKESS PRINTING COMPANY 
LANCASTER, PENNSYLVANIA 



349550 



^oo L. 



ADVERTISEMENT 



The present series, entitled " Smithsonian Miscellaneous Collec- 
tions ", IS intended to embrace all the octavo publications of the In- 
stitution, except the Annual Report. Its scope is not limited, and 
the volumes thus far issued relate to nearly every branch of science. 
Among these various subjects zoology, bibliography, geology, min- 
eralogy, anthropology, and astrophysics have predominated. 

The Institution also publishes a quarto series entitled "Smith- 
sonian Contributions to Knowledge". It consists of memoirs based 
on extended original investigations, which have resulted in impor- 
tant additions to knowledge. 

C. G. Abbot, 
Secretary of the Smithsonian Institution. 



( Hi ) 



CONTENTS 



Smithsonian Meteorological Tables. Fifth Revised Edition. 
(Corrected to January, 193 1.) 282 pages. 193 1. (Publ. 
3116.) (Whole volume.) 



(v) 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 

VOLUME 86 (WHOLE VOLUME) 



SMITHSONIAN 

METEOROLOGICAL 
TABLES 

[BASED ON GUVOT'S METEOROLOGICAL AND PHYSICAL TABLES] 



FIFTH REVISED EDITION 

(Corrected to January, 1931) 




(Publication 3116) 



CITY OF WASHINGTON 

PUBLISHED BY THE SMITHSONIAN INSTITUTION 

1931 



The Lord Baltimore I'ress 

Baltimore, Md. 

printed in the u.s.a. 



ADVERTISEMENT TO FIFTH REMSED EDITION. 



The original edition of the Smithsonian Meteorological Tables was issued 
in 1893, and revised editions were published in 1896, 1897. 1907, and 1918. A 
fifth revised edition is here presented, which has been prepared under the 
direction of Charles F. Mar\dn, Chief of the U. S. Weather Bureau, assisted 
by Herbert H. Kimball, Senior ^Meteorologist of the same bureau. Officials of 
the U. S. Bureau of Standards have been consulted relative to the value of 
certain physical constants that enter into the calculation of the tables. All 
errata thus far detected in the earlier editions have been corrected. 

The great development in the exploration of the free air to the height 
of the tropopause and even beyond calls for an extension of some tables to 
adapt them to the low temperatures and pressures experienced at these great 
heights, and also for a distinction between the symbols for the acceleration of 
gravity at the surface of the earth and in the free air. Also, the measurement 
of heights as " geopotentials " in " dynamic meters " calls for five new tables. 
The table of international meteorological symbols has been revised, and a 
table of " International code for horizontal visibilit}' " has been added. Much 
of the work of extension of old tables and the computation of new ones has 
been done by the Aerological Division of the Weather Bureau. 

The complete revision of the " List of meteorological stations," including 
an alphabetical arrangement by continents, countries, and stations, has been 
effected by Mr. W. \Y. Reed of the Climatological Division, U. S. Weather 
Bureau. 

Charles G. Abbot, 

Secretary. 
Smtthsoniax Institution, 
March 21, igsi. 



ADVERTISEMENT TO FOURTH REVISED EDITION. 



The original edition of the Smithsonian Meteorological Tables was 
issued in 1893, and revised editions were published in 1896, 1897, and 1907. 
A fourth revised edition is here presented, which has been prepared under 
the direction of Professor Charles F. Marvin, Chief of the U.S. Weather 
Bureau, assisted by Professor Herbert H. Kimball. They have had at their 
disposal numerous notes left by the late Professor Cleveland Abbe, and 
have consulted with officials of the U.S. Bureau of Standards and of other 
Government bureaus relative to the value of certain physical constants 
that have entered into the calculation of the tables. 

All errata thus far detected in the earlier editions have here been 
corrected. New vapor pressure tables, derived from the latest experimental 
values by means of a modification of Van der Waals interpolation formula 
devised by Professor Marvin, have been introduced. The table of relative 
acceleration of gravity at different latitudes has been recomputed from a 
new equation based upon the latest investigations of the U.S. Coast and 
Geodetic Survey. These values have been employed in reducing barometric 
readings to the standard value of gravity adopted by the International 
Bureau of Weights and Measures, supplementing a table that has been 
introduced for directly reducing barometer readings from the value of grav- 
ity at the place of observation to its standard value. 

The new values of vapor pressure and of gravity acceleration thus 
obtained, together with a recent and more accurate determination of the 
density of mercury, have called for an extensive revision of numerous other 
tables, and especially of those for the reduction of psychrometric observa- 
tions, and the barometrical tables. 

Among the new tables added are those for converting barometric 
inches and barometric millimeters into millibars, for determining heights 
from pressures expressed in dynamic units, tables of gradient winds, and 
tables giving the duration of astronomical and civil twilight, and the trans- 
mission percentages of radiation through moist air. 

The tables of International Meteorological Symbols, of Cloud Clas- 
sification, of the Beaufort Scale of Winds, of the Beaufort Weather Nota- 
tion, and the List of Meteorological Stations, are among those extensively 
revised. 

Tables for reducing barometric readings to sea level, and tables of 
logarithms of numbers, of natural sines and cosines, of tangents and cotan- 
gents, and for dividing by 28, 29, and 31, with a few others, have been 
omitted from this edition. 

This reprint is from the electroplates that were employed in print- 
ing the Fourth Revised Edition, after making certain minor corrections. 

Charles D. Walcott, 

Secretary. 
Smithsonian Institution, 
June, 1924. 

iv 



ADVERTISEMENT TO THIRD REVISED EDITION 



The original edition of Smithsonian Meteorological Tables was issued 
in 1893, and revised editions were published in 1896 and 1897. A third 
revised edition is here presented, which has been prepared at the request 
of the late Professor Langley by the cooperation of Professors Alexander 
McAdie, Charles F. Marvin, and Cleveland Abbe. 

All errata thus far detected have been corrected upon the plates, the 
Marvin vapor tensions over ice have been introduced, Professor F. H. 
Bigelow's System of Notation and Formulae has been added, the List of 
Meteorological Stations has been revised, and the International Meteoro- 
logical Symbols, together with the Beaufort Notation, are given at the 
close of the volume. 

R. Rathbun, 

Acting Secretary. 
Smithsonian Institution, 
December, 1906. 



ADVERTISEMENT TO SECOND REVISED EDITION. 



The edition of the Smithsonian Meteorological Tables issued in 1893 
having become exhausted, a careful examination of the work has been made, 
at my request, by Mr. Alexander McAdie, of the United States Weather 
Bureau, and a revised edition was published in 1896, with corrections 
upon the plates and a few slight changes. The International Meteorologi- 
cal Symbols and an Index were also added. 

The demand for the work has been so great that it becomes necessary 
to print a new edition of the revised work, which is here presented with 
corrections to date. 

S. P. Langley, 

Secretary. 
Smithsonian Institution, 
Washington City, 
October 30, 1897. 



PREFACE TO EDITION OF I89^ 



In connection with the system of meteorological observations estab- 
lished by the Smithsonian Institution about 1850, a collection oi 
meteorological tables was compiled by Dr. Arnoi^d GuyoT, at the 
request of Secretary Henry, and published in 1852 as a volume of the 
Miscella neons Collediojis. 

Five years later, in 1857, a second edition was published after 
careful revision by the author, and the various series of tables were 
so enlarged as to extend the work from 212 to over 600 pages. 

In 1859 a third edition was published, with further amendments. 

Although designed primarily for the meteorological observers report- 
ing to the Smithsonian Institution, the tables obtained a much wider 
circulation, and were extensively used by meteorologists and physicists 
in Europe and in the United States. 

After twenty-five years of valuable service, the work was again 
revised by the author ; and the fourth edition, containing over 700 
pages, was published in 1884. Before finishing the la.st few tables, 
Dr. GuYOT died, and the completion of the work was intrusted to his 
assistant. Prof. Wm. Libbey, Jr., who executed the duties of final editor. 

In a few years the demand for the tables exhausted the edition, 
and thereupon it appeared desirable to recast entirely the work. After 
very careful consideration, I decided to publish the new tables in 
three parts: Meteorological Tables, Geographical Tables, and 
Physical Tables, each representative of the latest knowledge in its 
field, and independent of the others ; but the three forming a homo- 
geneous series. 

Although thus historically related to Dr. Guyot's Tables, the present 
work is so substantially changed with respect to material, arrange- 
ment, and presentation that it is not a fifth edition of the older tables, 
but essentially a new publication. 

vii 



VIU PREFACE. 

In its preparation the advantage of conformity with the recently 
issued International Meteorological Tables has been kept steadily in view, 
and so far as consistent with other decisions, the constants and methods 
there employed have been followed. The most important difference in 
constants is the relation of the yard to the metre. The value provi- 
sionally adopted by the Bureau of Weights and Measures of the United 
States Coast and Geodetic Survey, 

I metre = 39.3700 inches, 

has been used here in the conversion-tables of metric and English 
linear measures, and in the transformation of all formulae involving 
such conversions. 

A large number of tables ha\re been newly computed ; those taken 
from the International Meteorological Tables and other official sources 
are credited in the introduction. 

To Prof. Wm. Libbey, Jr., especial acknowledgments are due for 
a large amount of attention given to the present work. Prof. lyiBBEY 
had already completed a revision, involving considerable recomputation, 
of the meteorological tables contained in the last edition of Guyot's 
Tables, when it was determined to adopt new values for many of the 
constants, and to have the present volume set with new type. This 
involved a large amount of new computation, which was placed under 
the direction of Mr. George E. Curtis, who has also written the 
text, and has carefully prepared the whole manuscript and carried it 
through the press. To Mr. Curtis' s interest, and to his special experi- 
ence as a meteorologist, the present volume is therefore largely due. 

Prof. LiBBEY has contributed Tables 38, 39, 55, 56, 61, 74, 77, 89, 
and 90, and has also read the proof-sheets of the entire work. 

I desire to express mj-- acknowledgments to Prof Cleveland Abbe, 
for the manuscript of Tables 32, 81, 82, 83, 84, 85, 86; to Mr. H. A. 
Hazen, for Tables 49, 50, 94, 95, 96, which have been taken from his 
Ha7id-book of Meteorological Tables ; and also to the Superintendent of 
the United States Coast and Geodetic Survey, the Chief Signal Officer 
of the Army, and the Chief of the Weather Bureau, for much valuable 
counsel during the progress of the work. 

S. P. LANGIvEY, 

SecreiaTy. 



Table of Contents. 



INTRODUCTION. PaGE 

Description and use of the Tables xv to Ixxxvi 

^ THERMOMETRICAL TABLES. 

Conversion of thennometric scales— 

1 Approximate Absolute, Centigrade, Fahrenheit, and Reau- 

mur scales 2 

2 Fahrenheit scale to Centigrade 5 

3 Centigrade scale to Fahrenheit 10 

4 Centigrade scale to Fahrenheit, near the boiling point of water 13 

5 Differences Fahrenheit to differences Centigrade .... 13 

6 Differences Centigrade to differences Fahrenheit .... 13 
Correction for the temperature of the emergent mercurial column 

of thermometers. 

7 Correction for Fahrenheit thermometers 14 

8 Correction for Centigrade thermometers 14 

CONVERSIONS INVOLVING LINEAR MEASURES. 

9 Inches into millimeters 16 

10 Millimeters into inches 23 

11 Barometric inches (mercury) into millibars 36 

12 Barometric millimeters (mercury) into millibars 38 

13 Feet into meters 40 

14 Meters into feet 42 

15 Miles into kilometers 44 

16 Kilometers into miles 46 

17 Interconversion of nautical and statute miles 48 

18 Continental measures of length with their metric and English 

equivalents 48 

CONVERSION OF MEASURES OF TIME AND ANGLE. 

19 Arc into time 5^ 

20 Time into arc 5^ 

21 Days into decimals of a year and angle ^2 

22 Hours, minutes and seconds into decimals of a day 56 

23 Decimals of a day into hours, minutes and seconds 56 



x table of contents. 

Table Page 

24 Minutes and seconds into decimals of an hour 57 

25 Local mean time at apparent noon 57 

26 Sidereal time into mean solar time 58 

27 Mean solar time into sidereal time 58 

CONVERSION OF MEASURES OF WEIGHT. 

28 Conversion of avoirdupois pounds and ounces into kilograms . . 60 

29 Conversion of kilograms into avoirdupois pounds and ounces . . 61 

30 Conversion of grains into grams 61 

31 Conversion of grams into grains 62 

WIND TABLES. 

32 Synoptic conversion of velocities 64 

33 Miles per hour into feet per second 65 

34 Feet per second into miles per hour 65 

35 Meters per second into miles per hour 66 

36 Miles per hour into meters per second 67 

37 Meters per second into kilometers per hour 68 

38 Kilometers per hour into meters per second 69 

39 Scale of velocity equivalents of the so-called Beaufort scale of 

wind 70 

Radius of critical curvature and velocities of gradient winds for 
frictionless motion in highs and lows — 

40 English measures 71 

41 Metric measures 72 

REDUCTION OF TEMPERATURE TO SEA LEVEL. 

42 English measures 76 

43 Metric measures y'j 

REDUCTION OF BAROMETER READINGS TO STANDARD UNITS. 

Reduction of the barometer to standard temperature — 

44 English measures 80 

45 Metric measures 100 

Reduction of the mercurial column to standard temperature. 

(For U-shaped manometers with brass scales.) — 

46 English measures 123 

47 Metric measures 125 

Reduction of mercurial barometer to standard gravity — 

48 Direct reduction from local to standard gravity 127 

Reduction through variation with latitude — 

49 English measures 128 

50 Metric measures ■ 130 



TABLE OF CONTENTS. XI 

TABLES FOR DETERMINING HEIGHTS AND CONVERSIONS 
'p^gLE INVOLVING GEOPOTENTIAL. PacF 

Determination of heights by the barometer. EngHsh measures. 

51 Values of 60368 [1 + 0.0010195x36] log. -—— .... i^-? 

D 

52 Term for temperature 137 

53 Correction for gravity and weight of mercury 139 

54 Correction for an average degree of humidity 141 

55 Correction for the variation of gravity with aUitude . . . 142 
Determination of heights by the barometer. Metric and dynamic 

measures — 

56 Vahies of 18400 log ^—^ 143 

57 Values of 18400 log — ^^ 144 

58 Temperature correction factor (a = .00367^) 146 

59 Temperature correction (o.oo367^xZ) 147 

60 Correction for humidity 148 

61 Correction for humidity. Auxiliary to Table 58 150 

62 Correction for gravity and weight of mercury 152 

63 Correction for the variation of gravity with altitude . . . 153 

64 Heights reduced from meters to dynamic meters, the- acceleration 

of gravity at sea level being 9.80 154 

65 Corrections to Table 64 for values of the acceleration of gravity 

at sea level different from 9.80 155 

66 Normal value of the acceleration of gravity at sea level • ... 155 

67 Heights reduced from dynamic meters to geometric meters, the 

acceleration of gravity at sea level being 9.80 .... 156 

68 Corrections to Table dj for values of the acceleration of gravity 

at sea level different from 9.80 157 

69 Difference of height corresponding to a change of o.i inch in the 

barometer. English measures 158 

70 Difference of height corresponding to a change of i millimeter in 

the barometer. Metric measures 159 

Determination of heights by the barometer — 

71 Formula of Babinet 160 

Barometric pressures corresponding to the temperature of the 

boiling point of water — 

72 English measures 161 

73 Metric measures 161 



i65 
169 
170 

173 
175 
176 
177 



Xll TABLE OF CONTENTS. 

rp HYGROMETRICAL TABLES. PaGE 

74 Pressure of aqueous vapor over ice. English measures . . . . 164 

75 Pressure of aqueous vapor over w^ater. English measures 

76 Pressure of aqueous vapor over ice. Metric measures . 

77 Pressure of aqueous vapor over water. Metric measures 

78 Pressure of aqueous vapor over ice. Dynamic measures 

79 Pressure of aqueous vapor over water. Dynamic measures 

80 Weight of a cubic foot of saturated vapor. English measures 

81 Weight of a cubic meter of saturated vapor. Metric measures 
Reduction of psychrometric observations. English measures — 

82 Values of e = e' -o.oooT^GyBit-t') f 1+ ~^^ \ .... 180 

83 Relative Humidity. Temperatures Eahrenheit 191 

Reduction of Psychrometric Observations. Metric measures — 

84 Values of ^ = £?' — o.ooo66o5(/; — ^') (i +0.00115^') .... 194 

85 Relative humidity. Temperature Centigrade 200 

86 Rate of decrease of vapor pressure with altitude for mountain 

stations 202 

Reduction of snowfall measurements — 

87 Depth of water corresponding to the weight of a cylindrical 

snow core 2.655 ii^ches in diameter 202 

88 Depth of water corresponding to the weight of snow (or 

rain) collected in an 8-inch gage 203 

89 Quantity of rainfall corresponding to given depths 203 

GEODETICAL TABLES. 

90 Value of gravity on the earth at sea level 206 

91 Relative acceleration of gravity at different latitudes .... 207 

92 Length of one degree of the meridian at different latitudes . . . 209 

93 Length of one degree of the parallel at different latitudes . . . 210 

94 Duration of sunshine at different latitudes 211 

95 Declination of the sun for the year 1899, at Greenwich apparent 

noon 222 

96 Duration of astronomical twilight 223 

97 Duration of civil twilight 224 

Relative intensity of solar radiation at different latitudes — 

98 Mean intensity for 24 hours of solar radiation on a hori- 

zontal surface at the top of the atmosphere 225 

99 Relative amounts of solar radiation received on a horizontal 

surface during the year at different latitudes .... 226 
100 Air mass, m, corresponding to different zenith distances of the sun 226 
loi Relative illumination intensities 226 



TABLE OF CONTENTS. Xlll 
•p^gLg MISCELLANEOUS TABLES. PacE 

Weight in grams of one cubic centimeter of air. English measures — 

102 Temperature term 228 

103 Humidity term, auxiliary to Table 104 229 

104 Humidity and pressure terms combined 230 

Weight in grams of one cubic centimeter of air. Metric measures — 

105 Temperature term 232 

106 Humidity term. Auxiliary to Table 107 233 

107 Humidity and pressure terms combined 234 

108 Atmospheric water-vapor lines in the visible spectrum .... 237 

109 Atmospheric water-vapor bands in the infra-red spectrum . . . 238 
no Transmission percentages of radiation through moist air . . . 239 

111 Energy distribution and atmospheric transmission of solar radi- 

ation 240 

112 International meteorological symbols 241 

113 International cloud classification 243 

114 Beaufort weather notation 245 

115 International code for horizontal visibility 246 

116 List of meteorological stations 247 

Index 279 



INTRODUCTION. 

DESCRIPTION AND USE OF TABLES. 



THERMOMETRY. 



The present standard for exact thermometry is the normal centigrade 
scale of the constant-volume hydrogen thermometer as defined by the In- 
ternational Bureau of Weights and Measures. The constant volume is one 
liter and the pressure at the freezing point is one meter of mercury reduced 
to freezing and standard gravity. The scale is completely defined by desig- 
nating the temperature of melting ice, o°, and of condensing steam, ioo°, 
both under standard atmospheric pressure. All other thermometric 
scales that depend upon the physical properties of substances may by defi- 
nition be made to coincide at the ice point and the boiling point with the 
normal scale as above defined, but they will diverge more or less from it 
and from each other at all other points. However, by international consent 
it is customary in most cases to refer other working scales to the hydrogen 
scale. 

The absolute or thermodynamic scale. To obviate the difficulty which 
arises because thermometers of different type and substance inherently 
disagree except at the fixed points. Lord Kelvin proposed that tempera- 
tures be defined by reference to certain thermodynamic laws. This course 
furnishes a scale independent of the nature or properties of any particular 
substance. The resulting scale has been variously named the absolute, the 
thermodynamic, and, more recently, in honor of its author, the Kelvin 
scale. The temperature of melting ice by this scale on the centigrade basis 
is not as yet accurately known, but it is very nearly 273.13, and that of the 
boiling point, 373°i3. 

Many problems in physics and meteorology call for the use of the abso- 
lute scale; but it is not convenient, and in many cases not necessary, to 
adhere strictly to the true thermodynamic scale. In fact, the general require- 
ments of science will very largely be met by the use of an approximate 
absolute scale which for the centigrade system is defined by the equation 

T = (273° + t° C.) 
The observed quantity, t°, may be referred to the normal hydrogen centi- 
grade scale or be determined by any acceptable thermometric method. 

This scale differs from the true Kelvin scale, first, because 273° is not the 
exact value of the ice point on the Kelvin scale, second, because each ob- 
served value of t° other than 0° or 100° requires a particular correction to 

XV 



o° 


100° 


C. 


32 


212 


F. or Fahr 





80 


R. 


273.13 C. ± 


373-13 C. ± 


A . or K. 


491.6 F. ± 


671.6 F.± 





XVI INTRODUCTION. 

convert It to the corresponding value on the Kelvin scale. These correc- 
tions will differ according to the kind of thermometer used in obtaining the 
value f , and while they are small for temperatures between 0° and 100° 
they are large at extreme temperatures and are important in all questions 
involving thermometric precision. 

Since, however, the approximate absolute scale is sufficiently exact for 
nearly all purposes, and especially since it is most convenient in computa- 
tions and in the publication of results, much confusion and uncertainty of 
terminology and meaning will be obviated if scientists will agree to give 
the approximate absolute scale a particular name of its own. 

For the purpose of these tables the name Approximate Absolute will be 
employed, and in accordance therewith thermometric scales may be desig- 
nated as follows: — 

Scale. Ice point. Boiling point. Symbol. 

Centigrade 
Fahrenheit 
Reaumur 

Thermodynamic 

-^ , . 1 (Names strictly synon\'mous and strictly 

Kelvm -11 1 

one ideal scale. 

Approximate Absolute 273 373 A. A. 

Table 1 . Conversion of the Approximate Absolute thermometric scale to the 
Centigrade, Fahrenheit, and Reaumur scales. 

The equivalent values of the four scales are given for every degree on 
the Approximate Absolute scale from 375° to 0°. 

By the help of the table of proportional parts preceding this talile, it 
is also convenient for converting Fahrenheit to Centigrade and Reaumur, 
and Centigrade to Fahrenheit and Reaumur. 

The formulae expressing the relations between the different scales are 
also given, in which 

A.A.° = Temperature — Approximate xA^bsolute Scale. 
C° = Temperature — Centigrade Scale. 
F.° = Temperature — Fahrenheit Scale. 
R° = Temperature — Reaumur Scale. 
Examples : 

To convert 285°5 Approximate Absolute into Centigrade, Fahrenheit, 
and Reaumur. 
From the table, 285? A. A. = 12? C. = 53?6 F. = g% R. 

From the proportional parts, 0.5 = 0.5 = 0.9 = 0.4 

285.5 A.A.= 12.5 C. = 54.5 F. = lO.oR. 



THERMOMETRICAL TABLES. XVll 

To convert i6°9 Centigrade to Approximate Absolute, Fahrenheit, and 
Reaumur. 

From the table, i6? C. = 289°^.^. = 6o°8 F. = I2°8 R. 

From the proportional parts 0.9 = 0.9 = i-6 = 07 

16.9 C.= 289.9 A. A. = 62.4 F. = 13.5 i?. 

Or, I6°9 X 2 (I - ^) + 32 = 33-8 

- 34 
32.0 



62.4 F. 

To convert I47°7 Fahrenheit to Approximate Absolute, Centigrade, and 
Reaumur. 

From the table, 140° F. = 333° A. A. = 60° C. = 48° R. 

From the proportional parts 7.7 = 4.3 = 4-3 = 3-4 

147.7 F. = 337-3 ^4.^. = 64.3 C. = 514^- 

1477 - 32.0 (^ ^ ^ J_ ^ _^ ^^^_) ^ 8 

' 2 ^10 100 1000 , „ 

+ 578 

+ .58 
+ x)6 

64.27 C. 

Fahrenheit may also be reduced to Approximate Absolute by obtain- 
ing its equivalent in Centigrade from Table 2 and adding 273 to the result. 

To convert i8°3 Reaumur to Approximate Absolute, Centigrade, and 
Fahrenheit. 

From the table, 16° R. = 293° A.A. = 20° C. = 68° F. 

From the proportional parts, 2.3 = 2.9 = 2.9 = 5-2 

T8.3 R. = 295.9 A.A. = 22.9 C. = 73.2 F. 

Or, 18.3 X ^^ = 5^ = 22.9 C, and (i8.3X^) + 32 = ^^+ 32 = 73-2 F. 
4 4 4 4 

TABLE 2. 

Table 2. Conversion of readings of the Fahrenheit thermometer to readings 
Centigrade. 

The conversion of Fahrenheit temperatures to Centigrade temperatures 
is given for every tenth of a degree from + I30°9 F. to — 120-9 P- The 
side argument is the whole number of degrees Fahrenheit, and the top argu- 
ment, tenths of a degree Fahrenheit ; interpolation to hundredths of a degree, 
when desired, is readily effected mentally. The tabular values are given to 
hundredths of a degree Centigrade. 
2 



XVlll INTRODUCTION, 

The formula for conversion is 

vv^here F° is a given temperature Fahrenheit, and C° the corresponding 
temperature Centigrade. 

Example : 

To convert 79°7 Fahrenheit to Centigrade. 
The table gives directly 26°50 C. 

For conversions of temperatures outside the limits of the table use 
Table i. 

Table 3. Conversion of readings of the Centigrade thermometer to readings 
Fahrenheit. 

The conversion of Centigrade temperatures to Fahrenheit temperatures 
is given for every tenth of a degree Centigrade from + 60.9 to — 90.9 C. 
The tabular values are expressed in hundredths of a degree Fahrenheit. 

The formula for conversion is 

F° - ^ C° + 32° 

where C° is a given temperature Centigrade, and F° the corresponding 
temperature Fahrenheit. 

For conversions of temperatures outside the limits of the table, use 
Table i or 4. 

Table 4. Conversion of readings of the Centigrade thermometer near the 
boiling point to readings Fahrenheit . 

This is an extension of Table 3 from 90.0 to 100.9 Centigrade. 

Example : 

To convert 95°74 Centigrade to Fahrenheit. 

From the table, 9570 C. = 204?26 F. 

By interpolation, 0.04 = 0.07 

9574 C. = 204^33 F. 

Table 5. Conversion of differences Fahrenheit to differences Centigrade. 

The table gives for every tenth of a degree from 0° to 20°9 F. the 
corresponding lengths of the Centigrade scale. 



THERMOMETRICAL TABLES. XIX 

TABLE 6. 

Table 6. Conversion of differences Centigrade to differences Fahrenheit. 

The table gives for every tenth of a degree from o° to 9.9 C. the corre- 
sponding lengths of the Fahrenheit scale. 

Example: 

To find the equivalent difference in Fahrenheit degrees for a difference 

of 4°72 Centigrade. 
From the table, 4°70 C. = 846 F. 

From the table by moving the decimal point for 0.2, 0.02 = 0.04 

^C. ^^F. 

TABLES 7, 8. 

Tables 7,8. Correction for the temperature of the emergent mercurial column 
of thermometers. 

When the temperature of the thermometer stem containing a portion 
of the mercury column is materially different from that of the bulb, a correc- 
tion needs to be applied to the observed reading unless the instrument has 
been previously graduated for the condition of use. This correction fre- 
quently becomes necessary in physical experiments where the bulb only, or 
else the bulb with a portion of the stem, is immersed in a bath whose tem- 
perature is to be determined. In meteorological observations the correction 
may become appreciable in wet-bulb, dew-point, and solar-radiation ther- 
mometers, when the temperature of the bulb is considerably above or below 
the air temperature. 

If ^ ' be the average temperature of the emergent mercury column, / the 
observed reading of the thermometer, n the length of the mercury in the 
emergent stem in scale degrees, and a the apparent expansion of mercury 
in glass for i°, the correction is given by the expression 

an {t - t'),ov - an {f - t) 

which latter may be the more convenient form when t ' is greater than t. 

The value of a varies with the composition of the glass of which the 
thermometer stem is composed. For glass of unknown composition the best 
average value for centigrade temperatures appears to be 0.000155, while for 
stems of Jena i6^^\ or similar glasses, or Jena 59^^\ the values 0.00016 
for the former and 0.000165 for the latter maybe preferred. (Letter from 
U.S. Bureau of Standards dated January 5, 191 8.) 

The use of the formula given above presupposes that the mean tempera- 
ture of the emergent column has been determined. This temperature may 
be approximately obtained in one of three ways, (i) By a " fadenthermo- 
meter" (Buckingham, Bulletin, Bureau of Standards, 8,239, 1911, Scientific 
Paper 170); (2) by exploring the temperature distribution along the stem 
and calculating the mean temperature; (3) by suspending along the side of, 
or attaching to the stem, a single thermometer. If properly placed this 



XX INTRODUCTION. 

thermometer will indicate the temperature of the emergent mercurial column 
to an accuracy sufficient for many purposes. Under conditions ordinarily 
met with in practice it is desirable to place the bulb of the auxiliary ther- 
mometer at some point below the middle of the emergent column. 

It is to be noted that the correction sought is directly proportional to the 
value of a, and that this may vary for glass stems of different composition 
from 0.00015 to 0.000165 for Centigrade temperatures. For thermometers 
ordinarily used in meteorological work, however, 0.000155 appears to be a 
good average value for Centigrade temperatures (0.000086 for Fahrenheit 
temperatures), and the correction formulee, therefore, are, 

T = t — 0.000086 11 (/' — /) Fahrenheit temperatures. 
T = t — 0.000155 n if — t) Centigrade temperatures. 

In the above, T = Corrected temperature. 
/ = Observed temperature. 

t' = Mean temperature of the glass stem and emergent mer- 
cury column. 
n — Length of mercury in the emergent stem in scale degrees. 

When t' \s { , } than / the numerical correction is to be < , , , ' > 

( lower ) ( added. j 

Table 7 gives corrections computed to 001 for Fahrenheit thermometers 
from the equation C = — 0.000086 « (/' — /). The side argument, n, is given 
for 10° intervals from 10° to 130°; the top argument, /' — /, for 10° intervals 
from 10° to 100°. 

Table 8 gives corrections computed to O.oi for Centigrade thermometers 
from the equation C = — 0.000155 n (/' — /). The side argument, n, is 
given for 10° intervals from 10° to 100°; the top argument, /' — /, for 10° 
intervals from 10° to 80°. 

Example: 

The observed temperature of a black-bulb thermometer is 120.4 ^-i 
the temperature of the glass stem is 55?2 F., and the length of mer- 
cury in the emergent stem is 130° F. To find the corrected tempera- 
ture. With n= 130° F. and t' — t = — 65° F., as arguments. Table 
7 gives the correction o?7 F., which by the above rule is to be added 
to the observed temperature. The corrected temperature is therefore 

121. I F. 

CONVERSIONS INVOLVING LINEAR MEASURES. 

The fundamental unit of length is the meter, the length of which is equal 
to the distance between the defining lines on the international prototype 
meter at the International Bureau of Weights and Measures (near Paris) 
when this standard is at the temperature of melting ice (0° C). The relation 



CONVERSIONS INVOLVING LINEAR MEASURES. XXI 

here adopted between the meter and the yard, the English measure of 
length, is i meter = 39.3700 inches, as legalized by Act of U.S. Congress, 
July 28, 1866. This U.S. Standard of length must be distinguished from the 
British Imperial yard, comparisons of which with the international proto- 
type meter give the relation i meter == 39-370II3 inches. (See Smithsonian 
Physical Tables, 1916, p. 7, Table 3.) 

Table 9. Inches into millimeters. table 9. 

I inch = 25.40005 millimeters. 

The argument is given for every hundredth of an inch up to 32.00 inches, 
and the tabular values are given to hundredths of a millimeter. A table of 
proportional parts for thousandths of an inch is added on each page. 

Example : 

To convert 24.362 inches to millimeters. 
The table gives (p. 20). 

(24.36 + .002) inches = (618.75 + O-OS) mm- "= 618.80 mm. 

Table 10. Millimeters into inches. table 10. 

From O to 400 mm. the argument is given to every millimeter, with 
subsidiary interpolation tables for tenths and hundredths of a millimeter. 
The tabular values are given to four decimals. From 400 to looo mm., 
covering the numerical values which are of frequent use in meteorology 
for the conversion of barometric readings from the metric to the English 
barometer, the argument is given for every tenth of a millimeter, and the 
tabular values to three decimals. 

Example : 

To convert 143.34 mm. to inches. 
The table gives 

(143 + .3 + .04) mm. = (5.6299 + 0.0118 +0.0016) inches = 5.6433 
inches. tables 11. 12. 

Tables 11, 12. Conversion of barometric readings into standard units oj 
pressure. 

The equation for the pressure in millibars, ' P„,i, corresponding to the 
barometric height, B, is 

1000 

where A is the densitv of mercury and g^ is the standard value of gravity. 

^ The value of the bar as here defined is a pressure of 1,000,000 dynes per square 
centimeter, and is that employed by meteorological services, and recommended by inter- 



XXll ■ INTRODUCTION. 

In order that pressures thus derived shall be expressed in C.G.S. units it 
is evident that the recognized standard values of the constants of the equa- 
tion must be employed. It therefore becomes necessary to abandon the 
values for the density of mercury and for standard gravity heretofore em- 
ployed, which had the sanction of the International Meteorological Com- 
mittee, in favor of the more recently determined values that have been 
adopted by the International Bureau of Weights and Measures. 

The value adopted for A is 13.5951 grams per cubic centimeter;^ and 
for (/o, 980.665 dynes. ^ 

By the use of these constants in the above equation we obtain 
Pmb = 1-333224 B (millimeters), and 

Pm, = 'o^oIIIt ^ = >^3-86395 B (inches) 

ivhere B is the height of the barometer in the units indicated, after reduc- 
tion to standard temperature and the standard value of gravity. 

Table 1 1 , Barometric inches to millibars. 

The argument is for o.oi inch. From O.OO to 2.49 inches the tabulated 
values are given to the nearest hundredth of a millibar, so that by removing 
the decimal one place to the right the value in millibars of every tenth inch 
from 0.0 to 24.9 inches may be obtained to the nearest tenth of a millibar. 
From 25.00 to 31.99 inches the tabular values are given to the nearest tenth 
of a millibar. 

The first part of the table may be used as a table of proportional parts 
for interpolation. 
Example : 

To convert 23.86 barometric inches into millibars of pressure. 

From Table 11, 23.8 inches = 806.0 millibars 
" " " .06 inch = 2.0 " 

23.86 inches = 808.0 millibars 

Table 12. Barometric millimeters to millibars. 

The argument is for each millimeter from I to 799, and the tabular 
values are given to the nearest tenth of a millibar. 

This table may also be used to convert millibars into millimeters of 
mercury. 

national meteorological and aerological conferences. It is 1,000,000 times greater than 
that given in the Smithsonian Physical Tables, 6th cd., 1914, p. 346. The smaller 
value is generally employed by physicists and chemists. See Marvin, Charles F. No- 
menclature of the Unit of Absolute Pressure. Monthly Weather Review, 1918, 46 : 73-75. 

^ Chappuis, Recueil de Constantes Physiques, Soc. Fr. Phys., 1913, p. 139. Leduc, Trav. 
et Mem., Bur. Int. Poids et Mes., xvi, p. 36, 1917. 

* Comptes Rendus des .Seances, Troisieme Conference Generale, p. 68. Trav. et Mem., 
Bur. Int. Poids et Mes., xii, 1902. 



CONVERSIONS INVOLVING LINEAR MEASURES. XXlll 

Example : 

To convert 1003.5 millibars into millimeters of mercury. 1003.5 mb. 
= (1002.6 +0.9) mb. = (752 +0.68) mm. = 752.68 mm. 

Table 13. Feet into meters. table 13. 

From the adopted value of the meter, 39.3700 inches — 
I English foot = 0.3048006 meter. 

Table 13 gives the value in meters and thousandths (or millimeters) 
for every foot from o to 99 feet; the value to hundredths of a meter (or 
centimeters) of every 10 feet from 100 to 4090 feet; and the value to tenths 
of a meter of every 10 feet from 4000 to 9090 feet. In using the latter part, 
the first line of the table serves to interpolate for single feet. 
Example : 

To convert 47 feet 7 inches to meters. 47 feet 7 inches = 47.583 feet. 

The table gives 47 feet = 14.326 meters. 

By moving the decimal point 0.583 " = 0.178 

47.583 feet = 14-504 meters. 

Table 14. Meters into feet. table 1 4. 

I meter = 39.3700 inches = 3.280833 + feet. 
From o to 509 meters the argument is given for every unit, and the 
tabular values to two decimals; from 500 to 5090 the argument is given to 
every lO meters, and the tabular values to one decimal. The conversion for 
tenths of a meter is added for convenience of interpolation. 
Example : 

Convert 4327 meters to feet. 
The table gives 

(4320 + 7) meters = (14173.2 +23.0) feet = 14196.2 feet. 

Table 15. Miles into kilometers. table 15. 

I mile = 1.609347 kilometers. 
The table extends from o to 1009 miles with argument to single miles, 
and from looo to 20000 miles for every lOOO miles. The tabular quanti- 
ties are given to the nearest kilometer. 

Table 16. Kilometers into miles. table is. 

I kilometer = 0.621370 mile. 
The table extends to 1009 kilometers with argument to single kilo- 
meters, and from lOOO to 20000 kilometers for every lOOO kilometers. Tabu- 
lar values are given to tenths of a mile. 
Example : 

Convert 3957 kilometers into miles. 
The table gives 

(3000 + 957) kilometers = (1864. i + 594.7) miles = 2458.8 miles. 



XXIV INTRODUCTION. 

Table 1 7. Inter conversion of nautical and statute miles. 

The nautical mile as defined by the U.S. Coast and Geodetic Survey 
(Tables for a polyconic projection of maps. U.S. Coast and Geodetic Sur- 
vey, Special Publication No. 5, page 4) is "A minute of arc of a great circle 
of a sphere whose surface equals that of the Clarke representative spheroid 
of 1866," and the value given is 1853.25 meters, or 6080.20 feet. 

Table 18. Continental measures of length with their metric and English 
equivalents. 

This table gives a miscellaneous list of continental measures of length, 
alphabetically arranged, with the name of the country to which they belong 
and their metric and English equivalents. 

CONVERSION OF MEASURES OF TIME AND ANGLE. 

Table 19. Arc into time. 

i=4;i=4,i = 

Example : 

Change 124° 15' 24^7 into time. 
From the table. 



Is 

15 


= o!o67. 










124° - 


8^ 


16"^ 


0^ 




15' - 




I 







24" = 






1.600 




o"7 = 






.047 




8^ 


17- 


1-647 



Table 20. Time into arc. 



jh = 15°. i" = 


15'; I' = 


= 15". 






Example : 












Change 8'' 17'"" i''647 into arc. 












From the table. 


8'^ 


= 


120° 








j-,m 


= 


4 


15' 






l^ 


= 






15" 




0.64 


= 






9.60 


By moving the decimal point, 


.007 


= 






O.IO 



124 15' 24.'7 
Table 21 . Days into decimals of a year and angle. 

The table gives for the beginning of each day the corresponding decimal 
of the year to five places. Thus, at the epoch represented by the beginning 
of the 15th day, the decimal of the year that has elapsed since January i.O 

14 

is computed from the fraction — — —. The corresponding value in angle 

obtained by multiplying this fraction by 360°, is given to the nearest minute. 



CONVERSION OF MEASURES OF TIME AND ANGLE. 



Two additional columns serve to enter the table with the day of the 
month either of the common or the bissextile year as the argument, and 
may be used also for converting the day of the month to the day of the 
year, and vice versa. 
Example : 

To find the number of days and the decimal of a year between Febru- 
ary 12 and August 27 in a bissextile year. 

Aug. 27: Day of year = 240; decimal of a year = 0.65435 

Feb. 12: " " " = j^; " " " =0^0499 

Interval in days = 197; interval in decimal of a year = 0.53936 

The decimal of the year corresponding to the interval 197 da.ys may 
also be taken from the table by entering with the argument 198. 

Table 22. Hours, minutes and seconds into decimals of a day. table 22. 

The tabular values are given to six decimals. 
Example : 

Convert 5*^ 24"" 23^4 to the decimal of a day: 

5^ = 0^208333 
24™ = 016667 
23^ = 266 

By interpolation, or by moving the decimal for 4^ 0.4 = 5 

0^225271 

Table 23. Decimals of a day into hours, minutes and seconds. table 23 

Example : 

Convert 0^225271 to hours, minutes and seconds: 

0.22 day = 4*^ 48" + 28"' 48^ = 5'' 16™ 48^ 

0.0052 day = 7"" 12' + I7f28 = 7 29 28 

0.000071 day = 6^05 + 0.09 = 6.14 

5' 24"^ 23:4 

Table 24. Minutes and seconds into decimals of an hour. table 24 

The tabular values are given to six decimals. 
Example : 

Convert 34"" 28^7 to decimals of an hour. 

34- =0*^566667 

28^ = 7778 

o°7 = 194 

0.574639 



XXVI INTRODUCTION. 

Table 25. Local mean time at apparent noon. 

This table gives the local mean time ^ that should be shown by a clock 
when the center of the sun crosses the meridian, on the 1st, 8th, i6th, and 
24th days of each month. The table is useful in correcting a clock by means 
of a sundial or noon mark. 
Example : 

To find the correct local mean time when the sun crosses the meridian 

on December 15, 1891. 
The table gives for December 16, 11'^ 56'". By interpolating, it is seen 
that the change to December 15 would be only one-half minute; 
the correct clock time is therefore 4 minutes before 12 o'clock 
noon. 

Table 26. Sidereal time into mean solar time. 
Table 27. Mean solar time into sidereal time. 

According to Newcomb, the length of the tropical year is 365.24220 
mean solar days,'- whence 

365.24220 solar days = 366.24220 sidereal days. 
Any interval of mean time may therefore be changed into sidereal time 

by Increasing it by its —^ — ^^ part, and any interval of sidereal time may 

be changed into mean time by diminishing it by its —77 part. 

^ .7 & .r 366.24220 ^ 

Table 26 gives the quantities to be subtracted from the hours, minutes 
and seconds of a sidereal interval to obtain the corresponding mean time 
interval, and Table 27 gives the quantities to be added to the hours, min- 
utes and seconds of a mean time interval to obtain the corresponding side- 
real interval. The correction for seconds is sensibly the same for either a 
sidereal or a mean time interval and is therefore given but once, thus form- 
ing a part of each table. 
Examples: 

Change 14'^ 25"^ 36^2 sidereal time into mean solar time. 

Given sidereal time 

Correction for 14^ 

25" 
36!2 

Corresponding mean time = 14 23 14.4 





14^ 


25™ 


36^2 


- 2^" i7!6i 








— 4.10 








- .10 




—2 




- 2 21.81 


21.8 



1 Derived from the equation of time for Washington apparent noon for the year 
1899. See the American Ephemeris and Nautical Almanac, 1899, pages 377-84. 

2 The length of the tropical year is not absolutely constant. The value here given is 
for the year 1900. Its decrease in 100 years is about 0.5s. (See the American Ephemeris 
and Nautical Almanac 1918, page xvi.) 



CONVERSION OF MEASURES OF WEIGHT. XXVll 

2. Change 13*^ 37"^ 22!/ mean solar time into sidereal time. 

Given mean time = 13'' 37"" 22^7 

Correction for 13^ = + 2™ 8!i3 

37"" = + 6.08 

22!7 = + 0.06 

+ 2 14.27 + 2 14.3 

Corresponding sidereal time = I3 39 37-0 



CONVERSION OF MEASURES OF WEIGHT. 

TABLE 28. 

Table 28. Conversion of avoirdupois pounds and ounces into kilograms. 

The comparisons of July, 1893, made by the International Bureau of 
Weights and Measures between the Imperial standard pound and the 
"kilogram prototype" resulted in the relation: 

I pound avoirdupois = 453.592 427 7 grams. 

For the conversion of pounds, Table 28 gives the argument for every 
tenth of a pound up to 9.9, and the tabular conversion values to ten-thou- 
sandths of a kilogram. 

For the conversion of ounces, the argument is given for every tenth 
of an ounce up to 15.9, and the tabular values to ten-thousandths of a kilo- 
gram. 

TABLE 29. 

Table 29. Conversion of kilograms into avoirdupois pounds and ounces. 

From the above relation between the pound and the kilogram, 

I kilogram = 2.204622 avoirdupois pounds. 
= 35.274 avoirdupois ounces. 

The table gives the value to thousandths of a pound of every tenth of 
a kilogram up to 9.9; the values of tenths of a kilogram in ounces to four 
decimals; and the values of hundredths of a kilogram in pounds and ounces 
to three and two decimals respectively. 

Table 30. Conversion of grains into grams. tables 30, 31. 

Table 31 . Conversion of grams into grains. 

From the above relation between the pound and the kilogram, 

I gram = 15.432356 grains. 
I grain = 0.06479892 gram. 

Table 30 gives to ten-thousandths of a gram the value of every grain 
from I to 99, and also the conversion of tenths and hundredths of a grain 
for convenience in interpolating. 



XXVin INTRODUCTION. 

Table 31 gives to hundredths of a grain the vakie of every tenth of a gram 
from O.I to 9.9, and the value of every gram from i to 99. The vakies of 
hundredths and thousandths of a gram are added as an aid to interpolation. 

WIND TABLES. 

CONVERSION OF VELOCITIES. 

Table 32. Synoptic conversion of velocities. 

This table,^ contained on a single page, converts miles per hour into meters 
per second, feet per second and kilometers per hour. The argument, miles per 
hour, is given for every half unit from o to 78. Tabular values are given to 
one decimal. For the rapid interconversion of velocities, when extreme pre- 
cision is not required, this table has proved of marked convenience and utility. 
Table 33. Conversion of miles per hour into feet per second. 

The argument is given for every unit up to 149 and the tabular values are 
given to one decimal. 
Table 34. Conversion of feet per second into miles per hour. 

The argument is given for every unit up to 199 and the tabular values 
are given to one decimal. 
Table 35. Conversion of jneters per second into miles per hour. 

The argument is given for every tenth of a meter per second up to 60 
meters per second, and the tabular values are given to one decimal. 
Table 36. Conversion of miles per hour into meters per second. 

The argument is given for every unit up to 149, and the tabular values 
are given to two decimals. 
Table 37. Conversion of meters per second into kilometers per hour. 

The argument is given for every tenth of a meter per second up to 60 
meters per second, and the tabular values are given to one decimal. 
Table 38. Conversion of kilometers per hour into meters per second. 

The argument is given for every unit up to 200, and the tabular values 
are given to two decimals. 
Table 39. Scale of velocity equivalents of the so-called Beaufort scale of wind. 

The personal observation of the estimated force of the wind on an arbi- 
trary scale is a method that belongs to the simplest meteorological records and 
is widely practiced. Although anemometers are used at meteorological obser- 
vatories, the majority of observers are still dependent upon estimates based 
largely upon their ow^n judgment, and so reliable can such estimates be made 
that for many purposes they abundantly answer the needs of meteorology as 
well as of climatology. 

A great variety of such arbitrary scales have been adopted by dififerent 
observers, but the one that has come into the most general use and received 

1 From Hand-Book of Meteorological Tables. By H. A. Hazen. Washington, 1888. 



WIND TABLES. XXIX 

the greatest definiteness of application is the duodecimal scale introduced into 
the British navy by Admiral Beaufort about 1800. 

Table 39 is taken from the Observer's Handbook of the Meteorological 
Office, London, edition of 191 7, and the Marine Observer's Handbook of 
Meteorology, edition of 1930. The velocity equivalents in meters per second 
and miles per hour are based on extensive observational data collected by 
Dr. G. C. Simpson and first published by the Meteorological Office in 1906. 
Several other sets of ecjuivalents have been published in different countries. 
For a history of this subject see " Rept. loth Aleeting International Meteoro- 
logical Committee," Rome, 1913, Appendix VII (London, 1914), and a paper 
by G. C. Simpson on " The velocity equivalents of the Beaufort scale," Pro- 
fessional Notes No. 44, Air Ministry, ^Meteorological Office, London, 1926. 

Simpson points out that the Beaufort scale has been used by sailors for 
many generations to describe the effect of the air in motion on ships and their 
rigging, and upon the sea. With change in the rig of ships there still remains 
the effect of wind upon the surface of the sea, and to this has been added the 
effect upon objects on land. 

Finally, it became desirable to interpret wind force on the Beaufort scale 
in terms of wind velocity as measured by the anemometer. For this purpose 
experiments with the anemometer both on land and on sea were made. The 
results showed considerable discrepancies in the velocity equivalents of winds 
indicated by different numbers on the Beaufort scale, but Simpson attributes 
these discrepancies to differences in anemometer exposures during the tests. 
For example, the Meteorological Office equivalents represent velocities mea- 
sured by an anemometer not less than 10 meters above the ground level, while 
the Deutsche Seewarte equivalents represent velocities measured by ane- 
mometers as ordinarily exposed. 

Simpson proposed a scale of equivalents about midway between those 
determined by the Meteorological Office and by the Seewarte, respectively, 
and this compromise scale was adopted by the Commission for Synoptic 
Weather Information of the International Meteorological Organization at 
its meeting in Zurich in 1926, with the proviso that the velocity equivalents 
correspond on land with the wind speed at a height of approximately 6 meters 
above a level surface. Since, however, the International Commission for Air 
Navigation has taken as the surface wind that measured at a height of 10 to 
15 meters above the ground, it has seemed best in these tables to continue 
to adhere to the British Meteorological Office equivalents, which are based 
on the equation F = 0.836 V5^, where B is the Beaufort number representing 
the wind force, and V is the velocity equivalent in meters per second. 

The velocity equivalents adopted by the Commission for Synoptic Weather 
Information, referred to above, expressed in statute miles per hour, correspond 
very closely to the values in Table 39 expressed in nautical miles (knots) per 
hour. 



XXX INTRODUCTION. 

In the Quarterly Journal of the Royal Meteorological Society, volume 
XXX, No. 132, October, 1904, Prof. A. Lawrence Rotch has described an 
instrument for obtaining the true direction and velocity of the wind at sea 
aboard a moving vessel. If a line A B represents the wind due to the motion 
of a steamer in an opposite direction, and A C the direction of the wind rela- 
tive to the vessel as shown by the drift of its smoke, then, by measuring the 
angle DBA that the true wind makes with the vessel — which is easily done 
by watching the w^ave crests as they approach it — we obtain the third side, 
B C, of the triangle. This represents, in direction and also in length, on the 
scale used in setting off the speed of the ship, the true direction of the wind 
relative to the vessel and also its true velocity. The method fails when the 
wind direction coincides with the ship's course and becomes inaccurate when 
the angle between them is small. 

GRADIENT WINDS. 

When the motions of the atmosphere attain a state of complete equilib- 
rium of flow under definite systems of pressure gradients, the winds blow 
across the isobars at small angles of inclination depending upon the retard- 
ing effects of friction. At the surface of the earth friction is considerable and 
the angle across the isobars is often great. In the free air, however, the 
friction is small, and for some purposes may be disregarded entirely. Un- 
der an assumption of complete equilibrium of motion and f rictionless flow the 
winds will blow exactly parallel to the isobars — that is, perpendicular to the 
gradient which produces and sustains the motion. Such winds are called 
gradient winds. The anomalous condition of flow of terrestrial winds per- 
pendicular to the moving force is the result of the modifications of atmospheric 
motions due to the deflective influence of the earth's rotation, and to that other 
influence due to the inertia reaction of matter when it is constrained to move 
in a curved path, and commonly called centrifugal force. The equations for 
gradient wind motions have long been known to meteorologists from the work 
of Ferrel and others, and may be written in the following form : 

For Cyclones 



F = r V co2 sin2 (p + - CO sin </) 

For Anticyclones 

CO sin (^ — \ 



AP 

V = r\ CO sin (^ — 'V '•^^ sin- </> 

pr J 



(I) 



(.2) 



In C. G. S. Units, F = velocity of the gradient wind in centimeters per 
second; r= radius of curvature of isobars in centimeters; AP = pressure 
gradient in dynes per square centimeter per centimeter; p= density of air 
in grams per cubic centimeter; w = angular velocity of the earth's rotation 



WIND TABLES. 



XXXI 



per second = 



2 IT 

86164 



, and = latitude. In the Northern Hemisphere the 



winds gyrate counterclockwise in cyclones and clockwise in anticyclones. 

These gyrations are in the reversed direction each to each in the Southern 

Hemisphere. 

AP 
In equation (2) the values of V are imaginary for values of — greater 



AP 



pr 

defines and 
pr pco-sin^0 

fixes an isobar with minimum curvature in anticyclones. Winds cannot 

flow parallel to the isobars within this critical isobar. For this isobar the 

AP 

gradient wind has its maximum value Vc = : . For the same gra- 

pco sin 4> 
dient and for an isobar with the same curvature in a cyclone the gradient 
velocity is Vi = V^ (V2 — i) = 0.414 V^ 

When the isobars are parallel straight lines, a condition very often closely 
realized in nature, r = co and the gradient winds have the value given by 
either (i) or (2) after squaring, namely, 



AP 

than 0)- sm- (j). The equality = aj=sin-0, or r 



Vr = . 



V. = 



AP 



2 pco sm<^ 
For practical units equation (i) becomes 



If 

2 ^'^ 



V== R 



V 



V 



•0053] 


[73 


sin^ 


<^ + 


I 


I oRpd 


•0053 


173 


sin- 


+ 


•13333 
Rpd 



— .07292 sin (j) 



\/ .00531 73 sin- + -^^77p— .07292 sin 



.068914 sin^ + 



1 .6946 
Rpd 



.26252 sin 



Units of 
pressure. 

(I) (Millibars) 
(II) (Millimeters) 
(III) (Inches) 



V = velocities in meters per second in (I) and (II) and in miles per 

hour in (III). 
R = radius of curvature of isobar (wind path) in kilometers in (I) and 

(II) and in miles in (HI). 
The gradient is to be deduced from isobars drawn for pressure inter- 
vals of I millibar in (I), I millimeter in (II) and — inch in (HI); d, is the 

10 

perpendicular distance between isobars (as above defined) in kilometers in 

(I) and (II), and in miles in (HI). 

p = density of air = grams per cubic centimeter in all cases. 



xxxu 



INTRODUCTION. 



Also 



F, = 



13713 
pd sin (j) 
1.8284 
pd sin 4> 
64552 



(IV) 

(V) 

(VI) 



and Rr. = 



18.806 
pf/sin^0 

25-073 
pc^ sin- 

24-5QO 
_ pd sm^({> 



Units of 
pressure. 

(VII) (Millibars) 
(VIII) (Millimeters) 
(IX) (Inches) 



Radius of critical curvature and velocities of gradient winds for frictionless 
motion in Highs and Lows. 

Table 40. English Measures. tables 40, 41. 

Table 41 . Metric Measures. 

These tables give the radius of curvature of the critical isobar in anti- 
cyclones, computed from the equation 

pco " sm^ 
the velocity of the wind on this isobar, computed from the equation 

pco sm (f) 
the velocity of the wind on a straight isobar, computed from the equation 



V. = 



AP 



= - V 
2 



and 



2 pco sm </) 

the velocity of the wind in a cyclone having the same gradient as the anti- 
cyclone, and on an isobar having a radius of curvature equal to R^, com- 
puted from the equation 

Fi = V, (\/^ - i) - 0.414 V, 

Table 40, English measures, gives values of R^, in miles, and of F^ 
High, Vs, and V Low, in miles per hour. The side argument is the latitude 
for 10°, and at 5° intervals from 20° to 90°, inclusive. The top argument, 
d, is the perpendicular distance in miles between isobars drawn for pressure 

intervals of ^ inch. For values of d one tenth as great as given in the 
10 

heading of the table the values of Re, Vc High, F^, and F Low are increased 

tenfold. 

Table 41, metric measures, gives values of Re in kilometers, and of 

Vc High, Vs, and V Low, in meters per second. The side argument is the 

same as in Table 40. The top argument, d, is the perpendicular distance 

in kilometers between isobars drawn for pressure intervals of i millimeter. 

For values of d one tenth as great as given in the heading of the table the 

values of Re, Vc High, Vs, and F Low are increased tenfold. 



TEMPERATURE TABLES. XXXIU 

TEMPERATURE TABLES. 

REDUCTION OF TEMPERATURE TO SEA LEVEL. 

Table 42. English Measures. 
Table 43. Metric Measures. 

These tables give for different altitudes and for different uniform rates 
of decrease of temperature with altitude, the amount in hundredths of a 
degree Fahrenheit and Centigrade, which must be added to observed tem- 
peratures in order to reduce them to sea level. 

The rate of decrease of temperature with altitude varies from one 
region to another, and in the same region varies according to the season and 
the meteorological conditions; being in general greater in warm latitudes 
than in cold ones, greater in summer than in winter, and greater in areas 
of falling pressure than in areas of rising pressure. For continental plateau 
regions, the reduction often becomes fictitious or illusory. The use of the 
tables therefore requires experience and judgment in selecting the rate of 
decrease of temperature to be used. Much experimental work is now in 
progress with kites and balloons to determine average vertical gradients. 
It must be remembered that the tables here given are not tables giving the 
data as recently determined for various elevations. 

The tables are given in order to facilitate the reduction of temperature 
either upward or downward in special investigations, but the reduction 
is not ordinarily applied to meteorological observations. 

The tables, 42 and 43, are computed for rates of temperature change 
ranging from i° Fahrenheit in 200 feet to i° Fahrenheit in 900 feet, and 
from 1° Centigrade in 100 meters to 1° Centigrade in 500 meters; and for 
altitudes up to 5000 feet and 3000 meters respectively. 
Example, Table 42. 

Observed temperature at an elevation of 2,500 feet, 52^5 F. 

Reduction to sea le\'el for an assumed decrease in tem- 
perature of 1° F. for every 300 feet, -f 8°3 

Temperature reduced to sea level, 6o°8 F. 

Example, Table 43. 

Observed temperature at an elevation of 500 meters, I2?5 C. 
Reduction to sea level for an assumed decrease in tempera- 
ture of 1° C. for every 200 meters, -f 2?5 
Temperature reduced to sea level, i5?o C. 

BAROMETRICAL TABLES. 

REDUCTION TO A STANDARD TEMPERATURE OF OBSERVATIONS MADE WITH 
MERCURIAL BAROMETERS HAVING BRASS SCALES. 

The indicated height of the mercurial column in a barometer varies not 
only with changes of atmospheric pressure, but also with variations of the 
temperature of the mercury and of the scale. It is evident therefore that if 
3 



XXXIV INTRODUCTION. 

the height of the barometric column is to be a true relative measure of 
atmospheric pressure, the observed readings must be reduced to the values 
they would have if the mercury and scale were maintained at a constant 
standard temperature. This reduction is known as the reduction for tem- 
perature, and combines both the correction for the expansion of the mercury 
and that for the expansion of the scale, on the assumption that the attached 
thermometer gives the temperature both of the mercury and of the scale. 

The freezing point is universally adopted as the standard temperature 
of the mercury, to which all readings are to be reduced. The temperature 
to which the scale is reduced is the normal or standard temperature of the 
adopted standard of length. For English scales, which depend upon the 
English yard, this is 62° Fahrenheit. For metric scales, which depend upon 
the meter, it is 0° Centigrade. As thus reduced, observations made with 
English and metric barometers become perfectly comparable when con- 
verted by the ordinary tables of linear conversion, viz: inches to milli- 
meters and millimeters to inches (see Tables 9, 10), for these conversions 
refer to the meter at 0° Centigrade and the English yard at 62° Fahrenheit. 

Prof. C. F. Marvin in the Monthly Weather Review for July, 1898, has 
pointed out the necessity of caution in conversion of metric and English 
barometer readings: 

Example : 

Attached thermometer, 25.4 C. 
Barometer reading, 762.15 mm. 

If the temperature is converted to Fahrenheit = 77.7 and the reading 
to 30.006 in., the temperature correction according to table 44 would be 
— 0.133 inch and the reduced reading 29.873. This would be erroneous. The 
correct conversion is found by taking the correction corresponding to 25^4 C. 
and 762 mm., i.e., — 3.15 mm., which gives a corrected reading of 759 mm., 
and converted into inches gives 29.882 which is the correct result. 

Professor Marvin further remarks that circumstances sometimes arise 
in which a Centigrade thermometer may be used to determine the tem- 
perature of an English barometer, or a Fahrenheit attached thermometer 
may be used with a metric scale. In all such cases the temperature must be 
brought into the same system of units as the observed scale reading before 
corrections can be applied, and the observed reading must then be cor- 
rected for temperature before any conversion can be made. 

With aneroid barometers corrections for temperature and instrumental 
error must be determined for each instrument. 

The general formula for reducing mercurial barometers with brass scales 
to the standard temperature is 

r=--R ^ (^ -T)-l (t- e) 

I +m{t- T) ' 



BAROMETRICAL TABLES. XXXV 

in which C = Correction for temperature. 

B = Observed height of the barometric column. 
/ = Temperature of the attached thermometer. 
T — Standard temperature of the mercury. 
m — Coefficient of expansion of mercury. 
/ = Coefficient of Hnear expansion of brass. 
6 — Standard temperature of the scale. 
The accepted determination of the coefficient of expansion of mercury 
is that given by Broch's reduction of Regnault's experiments, viz: 

m (for 1° C.) = io~9 (181792 +0.175/ + 0.035 1 16/2). 

As a sufficiently accurate approximation, the intermediate value 

m = 0.0001818 

has been adopted uniformly for all temperatures in conformity with the 
usage of the International Meteorological Tables. 

Various specimens of brass scales made of alloys of different com- 
position show differences in their coefficients of expansion amounting to 
eight and sometimes ten per cent, of the total amount. The Smithsonian 
Tables prepared by Prof. Guyot were computed with the average value 
/ (for 1° C.) = 0.0000188; for the sake of uniformity with the International 
Meteorological Tables, the value 

/ = 0.0000184 

has been used in the present volume. For any individual scale, either value 
may easily be in error by four per cent. 

A small portion of the tables has been independently computed, but the 
larger part of the values have been copied from the International Meteoro- 
logical Tables, one inaccuracy having been found and corrected. 

Table 44, Reduction of the barometer to standard temperature — English 
measures. 

For the English barometer the formula for reducing observed readings 
to a standard temperature becomes 

m (t- 32°) - I it - 62°) 



C=-B 



I + m {t - 32°) 



in which B = Observed height of the barometer in English inches. 

t = Temperature of attached thermometer in degrees Fahrenheit. 

m = 0.0001818 X - = o.oooioi 
9 

/ = 0.0000184 X - = 0.0000102 
9 



XXXVl INTRODUCTION. 

The combined reduction of the mercury to the freezing point and of 
the scale to 62° Fahrenheit brings the point of no correction to approxi- 
mately 28!5 Fahrenheit. For temperatures above 28!5 Fahrenheit, the cor- 
rection is subtractive, and for temperatures below 28!5 Fahrenheit, the 
correction is additive, as indicated by the signs (+) and (— ) inserted 
throughout the table. 

The table gives the corrections for every half degree Fahrenheit from 
o° to ioo°. The limits of pressure are 19 and 31.6 inches, the corrections 
being computed for every half inch from 19 to 24 inches, and for every two- 
tenths of an inch from 24 to 31.6 inches. 

Example : 

Observed height of barometer = 29.143 
Attached thermometer, 54?5 F. 

Reduction for temperature = — 0.068 

Barometric reading corrected for temperature = 29.075 

TABLE 45. 

Table 45. Reduction of the barometer to standard temperature — Metric 
measures. 

For the metric barometer the formula for reducing observed readings 
to the standard temperature, 0° C, becomes 

C= -B ^^ " ^^' 
I + mt 

in which C and B are expressed in millimeters and / in Centigrade degrees. 

m =0.0001818; / =0.0000184. 

In the table, the limits adopted for the pressure are 440 and 795 milli- 
meters, the intervals being 10 millimeters between 440 and 600 millimeters, 
and 5 millimeters between 600 and 795 millimeters. 

The limits adopted for the temperature are 0° and + 35?8, the inter- 
vals being o?5 and i-o from 440 to 560 millimeters, and o°2 from 560 to 
795 millimeters. 

For temperatures above 0° Centigrade the correction is negative, and 
hence is to be subtracted from the observed readings. 

For temperatures below 0° Centigrade the correction is positive, and 
from 0° C. down to — 20° C. the numerical values thereof, for ordinary baro- 
metric work, do not materially differ from the values for the correspond- 
ing temperatures above 0° C. Thus the correction for — 9° C. is numeri- 
cally the same as for -f 9° C. and is taken from the table. In physical work 
of extreme precision, the numerical values given for positive temperatures 
may be used for temperatures below o'^ C. by applying to them the follow- 
ing corrections: 



BAROMETRICAL TABLES. 



XXXVll 



Corrections to be applied to the tabular values of Table 45 in order to use them 
zvhcn the temperature of the attached thermometer is below 0° Centigrade. 









PRESSURE IN MILLIMETERS. 






Temper- 
ature. 




































450 


500 


550 


600 


650 


700 


750 


800 


C. 


mm. 


mm. 


mm. 


mm 


mm. 


mm. 


mm. 


mm. 


— 1° 


0.00 


0.00 


0.00 


0.00 


0.00 


0.00 


0.00 


0.00 


- 9 


.00 


.00 


.00 


.00 


.00 


.00 


.00 


.00 


— 10 


0.00 


0.00 


0.00 


0.00 


0.00 


+ 0.01 


4- O.OI 


-ho. 01 


II 


.00 


.00 


.00 


.00 


+ 0.01 


.01 


.01 


.01 


12 


.00 


.00 


.00 


-f O.OI 


.01 


.01 


.01 


.01 


13 


.00 


.00 


+ 0.01 


.01 


.01 


.01 


.01 


.01 


-14 


.00 


-ho.oi 


.01 


.01 


.01 


.01 


.01 


.01 


-IS 


+ 0.01 


-Hooi 


+ 0.01 


+ 0.01 


+ 0.01 


-f-o.oi 


-(-O.OI 


+ 0.01 


16 


.01 


.01 


.01 


.01 


.01 


.01 


.01 


.01 


17 


.01 


■01 


.01 


.01 


.01 


.01 


.01 


.02 


18 


.01 


.01 


.01 


.01 


.01 


.01 


.01 


.02 


-19 


.01 


.01 


.01 


.01 


.01 


.01 


.02 


.02 


— 20 


+ 0.01 


-l-o.oi 


+ 0.01 


-l-o.oi 


+ 0.01 


+ 0.02 


+ 0.02 


-f-0.02 


21 


.01 


.01 


.01 


.02 


.02 


.02 


.02 


.02 


22 


.01 


.01 


.02 


.02 


.02 


.02 


.02 


.02 


23 


.01 


.02 


.02 


.02 


.02 


.02 


.02 


.02 


-24 


.OI 


.02 


.02 


.02 


.02 


.02 


.02 


•03 



Example: 

Observed height of barometer, 763.17' 

thermometer, — 12° C. 
Numerical value of the reduction for + 12° C. 
Correction for temperature below 0° C. 
Reduction for — 12° C. 
Observed height of barometer 
Barometer corrected for temperature 



Temperature of the attached 



1.50 

+ O.OI 

+ 



I-5I 
= 763.17 

764.68 



Table 46. Reduction of the mercurial column in U-shaped manometers with 
brass scales to standard temperature. English measures. 

This is in reality an extension of Table 44 to the small differences in 
height of the mercurial columns as determined with a U-shaped manometer 
and is used especially in the calibration of instruments for upper-air Investi- 
gations. Since the corrections are directly proportional to the observed height 
of the mercurial column, they have been obtained by multiplying corrections 
given In Table 44 by the appropriate decimal. They have been computed for 
each inch of pressure from i inch to 20 inches, inclusive, and for intervals of 
temperature of 2 degrees, from o" to 100° Fahrenheit. 



XXXVni INTRODUCTION. 

Example : 

Observed heights of the mercury in the manometer tubes (in.), +6.258 

and -4-375- 
Difference in height of the two cohimns 10.633 

Attached thermometer, 72 °4 F. 

Correction for temperature — .042 

Manometer reading corrected for temperature 10.591 

For temperatures above 28? 5 Fahrenheit, the correction is subtractive, 
and for temperatures below 28^5 Fahrenheit, the correction is additive, as 
indicated by the signs ( + ) and ( — ) inserted throughout the table. 
Table 47, Reduction of the mercurial column in U-shaped manometers with 
brass scales to standard temperature. Metric measures. 

This table is an extension of Table 45 to the small differences in height 
of the mercurial columns as determined with a U-shaped manometer. The 
values have been obtained from the corrections given in that table by the same 
process as those given in Table 46 were obtained from Table 44. 

Example : 

Observed heights of the mercury in the manometer tubes (mm.), + 12 1.5 

and —86.7. 
Dift'erence in height of the two columns 208.2 

Attached thermometer, i8?4 C 
Correction for temperature — 0.6 

Manometer reading corrected for temperature 207.6 

For temperatures above 0° C. the correction is negative, and hence is to 
be subtracted from the observed readings. For negative temperatures see the 
explanation of Table 45. 

reduction of the mercurial barometer to standard gravity. 

Tables 48, 49, 50. 

The mercurial barometer does not directly measure the atmospheric 
pressure. The latter is proportional to the weight of the mercurial column, 
and also to its height after certain corrections have been applied. Since the 
height of the barometric column is easily measured, by common consent the 
pressures are expressed in terms of this corrected height. 

The observed height of the barometer changes with the temperature of 
the mercury as already shown, and also with the variations in the value of 
gravity, as well as with the pressure. Therefore, to obtain a height that shall 
be a true relative measure of the atmospheric pressure, the observed height 
of the mercurial column must not only be reduced to what its height would 
be if at a standard temperature, but also to what it would be at a standard 
value of gravity. 



BAROMETRICAL TABLES. XXXIX 

As Stated on page xxii, the standard valne of gravity adopted is 980.665 
dynes. At the time of its adoption this value was assumed to apply for 
" latitude 45° and sea-level " on the basis of the absolute determination of 
g at the International Bureau by DefTorges, 1887-1890 (Proces-Verbaux, 
Comite Inter, d. Poids et Mesures, 1887, pp. 27-28, 86; 1891, p. 135). 

More recent determinations/ based upon numerous measurements in all 
parts of the world, and assuming a certain ideal figure for the earth, give 
for the mean value of ^ at latitude 45° and sea level the value 980.621 
dynes. This differs from the standard value by 0.044 dyne. Departures 
of this magnitude from the mean sea-level gravity of a given latitude are 
frequently encountered, and in some cases surpassed. They are attributed 
to topography and isostatic compensation, and to gravity anomalies. For 
example, according to Bowie,- at Pikes Peak, Colo., the correction for 
topography and compensation is -|- 0.187 dyne, while the gravity anomaly'' 
is -1-0.021 dyne, giving a total gravity departure of -|- 0.208 dyne. Also, 
at Seattle, Wash., from the mean of measurements at two stations, the cor- 
rection for topography and compensation is —0.019 dyne* and the grav- 
ity anomaly is —0.093 dyne,^ giving a total gravity departure of — 0.112 
dyne. The gravity departure at Pikes Peak is sufficient to cause the barom- 
eter to read 0.004 inch or o.io mm. low, while the departure at Seattle is 
sufficient to cause the barometer to read 0.003 i^^h or 0.09 mm. high, as 
compared with what the readings would have been with gravity at normal 
intensity for the latitudes of the respective stations. 

From the foregoing it is evident that the value of local gravity, gi, at 
the observing station must be determined before the barometer reading 
can be accurately reduced to standard gravity. In many cases, and espe- 
cially at sea, it is not practicable to measure gi. In the United States its 
value may frequently be determined with sufficient accuracy in the follow- 
ing manner : 

( 1 ) Compute g,i,^ mean gravity at sea level for the latitude of the station, 
from the equation ^ 

5^0 = 978.039 (1+0.005294 sin- ^ — 0.000007 sin= 2<^), 

= 980.621 (1—0.002640 cos 2^-1-0.000007 COS^ 2</)) 

(2) Correct g^ for altitude by the equation^ 
c (dynes) = —0.0003086 h (meters), or 

c (dynes) = —0.000094 h (feet), 

1 Investigations of gravity and isostasy, by William Bow^ie. U. S. Coast and Geodetic 
Survey, Special Publication No. 40, 1917, p. 134. 

• Op. cit., p. 50. 3 Op. cit., p. 59. 4 Op. cit., p. 50. 5 Op. cit., p. 59. 

6 Bowie, op. cit., p. 134. 7 Bowie, op. cit., p. 93. 



xl INTRODUCTION. 

where li is the akitude of the station above sea level. 

(3) Correct (/^ for gravity anomaly.^ 

(4) Finally, <70 is to be corrected for topography and isostatic com- 
pensation.^ 

Example : 

To determine the value of local gravity, gj, at the Weather Bureau 
Office, Atlanta, Ga., latitude t>2>° 45' N., longitude 84° 23' W., 
height of barometer above sea level. 1218 feet. 

From Table 90, mean sea level gravity for lat- 
itude 33° 45' = 979-631 dynes. 

Correction for height of barometer 

(—0.000094x1218) =— 0.1 14 " 

Correction for gravity anomaly, = — 0.023 " 

Correction for topography and compensation = -f- 0.014 " 

Local gravity at Weather Bureau Office, Atlanta, 

Ga. = 979-508 dynes. 

Having determined gu the reduction of barometer readings to stan- 
dard gravity is easily and accurately accomplished by multiplying by the 
ratio gi/go, or by applying a correction to the barometer reading, other- 
wise corrected, derived from the expression --^^ — ^—-5. With giKQo the 

correction is to be subtracted; with gi'>go the correction is to be added. 
In general, sufficient accuracy will be attained by computing the gravity 

correction for a station once for all from the equation C = Bn ~ -i!^ 

in which Bn is the normal station barometer pressure, and C is expressed 
in the same units as En- 

Table 48 gives corrections to reduce barometer readings to standard grav- 
ity. The top argument is the barometer reading. The side argument is the 
difference, gi—go, for each tenth of a dyne up to 4.0 dynes. The relation 
is a linear function of both gi—go and B, and for barometer readings 10 or 
100 times greater than those given in the argument the correction may be 
obtained by removing the decimal point in the tabulated values one or two 
places, respectively, to the right. The correction obtained will be expressed 
in the same units as the barometer reading to be corrected. 

Example i. 

The barometer reading corrected for temperature is 29.647 inches, and the 
local value of gravity is 978.08. The difference, gi—go, =—2.585. 
From the table, 
the correction for a barometer reading of 20 inches = — 0.0527 in. 

the correction for a barometer reading of 9 inches = — 0.0237 in. 

the correction for a barometer reading of 0.65 inches = — 0.0017 ^^• 

Correction for a barometer reading of 29.65 inches = — 0.078 in. 

Corrected barometer reading =29.647 in. —0.078 in. = 29.569 in. 

1 In most cases the gravity anomaly may be obtained from Bowie's paper, op. cit., 
figure II. 

2 In some cases this correction may be obtained from Bowie's paper, op. cit., pp. 50-52, 
but in many cases, and especially in mountainous districts, it must be separately computed 
for each station. 



BAROMETRICAL TABLES. xH 

Example 2. 

The barometer reading reduced to 0° C. is 637.42 mm., and the local 
value of gravity is 981.51. The difference, ^z — (70= +0.845. From 
the table, 

the correction for a barometer reading of 600 mm. = + 0-5i7 "ini. 

the correction for a barometer reading of 30 mm. = + 0.026 mm. 

the correction for a barometer reading of 7 mm. = + 0.006 mm. 

Correction for a barometer reading of 637.4 i^"'!^''- — + <^-55 n\n'i- 

Corrected barometer reading =637.42 + 0.55 =+637.97 mm. 

In the case of barometer readings made at sea, and also at some land 
stations, it is not practicable to determine local gravity with greater ac- 
curacy than it can be computed from the equations for variations with lati- 
tude and altitude given above. The reduction to standard gravity, accord- 
ingly, consists of two parts — a correction for altitude, and a correction 
from the computed sea-level gravity for the latitude of the station to stan- 
dard gravity. The first part of the correction, or the correction for altitude, 
may be computed once for all from the expression c=— 0.0003086 li Bn 
(metric measures), or c= —0.000094 h Bn (English measures), and is usually 
combined with the reduction of the barometer to sea level or to some other 
reference plane. The second part has heretofore consisted of a correction for 
the difference between the mean value of gravity for the latitude of the 
station and for latitude 45° ; and, in accordance with the equation given 
above, it may be derived from the expression 

( —0.002640 cos 2 (^ + 0.000007 cos- 2 (f>)B 

where (f> is the latitude of the station, and B is the barometer reading. The 

1 r ..1 ^- ffi5'—go 980.621—980.665 _, . 

value of the ratio ^ = = — ^ ^ =—0.000045. Therefore, 

go 980.665 ^^ 

the expression for the gravity correction becomes 

( —0.00264 cos 2 ^ + 0.000007 COS" 2 (^ — 0.000045)5 

Table 49 (English measures) gives the corrections in thousandths of 
an inch for every degree of latitude and for each inch of barometric pres- 
sure from 19 to 30 inches, to reduce barometer readings to standard gravity, 
computed from the equation 

C=(— 0.00264 cos 2<f> + 0.000007 cos^ 2 — 0.000045 ) B 

Table 50 (metric measures) gives the same corrections in hundredths 
of a millimeter for each 20 millimeters barometric pressure from 520 to 780 
millimeters. 

Example: 

Barometric reading (corrected for temperature) at latitude 

63° 55', =27434 inches 

Correction to standard gravity, Table 49, =0.043 inches 

Barometer reduced to standard gravity, =27.477 inches 

The adoption of this new value for standard gravity may require a slight 
correction to old barometric records in order to make the entire series of read- 
ings homogeneous. The amount of this correction will be the difference be- 
tween the gravity correction computed by these new tables and by the old tables. 



xlii INTRODUCTION. 

Example : 

Seattle, Wash., Lat. 47° 38' N., Long. 122? 20' W., height of barometer 

above sea level 125 feet, normal station barometer 29.89 inches. 
<70 (Table 90) = 980.859 dynes. 

Correction for height ( —0.000094 X 125) =— 012 " 

Correction for topography and compensation = — .019 " 

Correction for gravity anomaly = — .093 " 

Value of local gravity 980.735 dynes. 

Correction to reduce l)arometer readings to standard gravity, 

980.735 — 980.665 „ • , r^, , • • ,1 

- — ~^^~ -Bn— +0.002 mch. Old correction, +0.007 ; correction to old 

980.665 ' 

records = 0.002 in. — 0.007 in. = —0.005 ^"• 

For correcting back records of readings at sea, or at any place where 

the value of local gravity cannot be determined, the correction is equal to 

, . 980.599 — 980.665 „ , „ _, . , ,, 

the ratio / /^ B— —0.000067 B. 1 he corrections are as follows : 

980.665 

Barometer reading. Correction. 

From 8 to 22 inches — o.ooi in. 

From 23 to 32 inches —0.002 in. 

From 380 to 520 mm. — 0-03 mm. 

From 530 to 670 mm. — 0.04 mm. 

From 680 to 820 mm. —0.05 mm. 

REDUCTION OF BAROMETER READINGS TO SEA LEVEL. 

Tables 51 to 63 inclusive, " Determinations of Heights by the Barometer," 
may be used for reducing barometric readings to sea level, provided the mean 
temperature and vapor pressure of the atmosphere between the observing 
station and sea level are known. 

See "Example: (English Measures)," p. xlix. 

Barometer at upper station corrected for temperature =23.61 in. 

Mean temperature of air column, 6, =35?o F. 

Latitude of station, </>, =44° 16' 

Altitude of station above mean sea level, Z, =6320 ft. 

The equation for computing the altitude Z is given on p. xlvii. This 
equation is simplified after justifiable approximations to the form (in English 
units) o r/i 29.9 , 29.9\ 

62583.6 (^ log ■;p -log ^ j = 

Z-Z [^0.0020390^-50°) +0.378 -|- +(y + ^)+ ^^^], 

where the terms are as defined on pp. xliv to xlvi, inclusive. Calling the 
terms in the bracket (a), (&), (c) and (rf), respectively, to compute B^ we 
have : 

from Table 52 with ^ = 6320 feet and ^=35?o F., Z(a) = — 194 

from Table 54 with Z = 6320 feet and average humidity, Z(&) = + 16 
from Table 53 with 2 = 6320 feet and <^ = 44° 16', Z(c) = + 16^ 

from Table 55 with 2 = 6320 feet and ho = o, Z(d) = + 2 

Z[(a) + (b) + (c) + (d)]= =-160. 



BAROMETRICAL TABLES. xHii 

Then since Z = 62,20 feet we have 

62583.6 (log^l^ ~^°^'^) =6320+160 = 6480. 

From Table 51 for 5 = 23.61 in., we have 

62583.6 log ^ =6-^20, hence 

20 Q 
62583.6 log p =6420 — 6480= —60. 

-Do 

Referring to Table 51 for the value of- Bo corresponding to this, we find 

.60 = 29.966 in. 

See "Example: (Metric Measures)," p. Hi. 

Let, the barometric reading (reduced to 0° C), i? = 655.7 mm., 

the mean temperature of the air column, ^=I2?3 C, 

the mean vapor pressure of the air column, e = g mm., 

the latitude, <j> = ^2°, 

the altitude of the station, Z=i379 meters. 

The equation for computing Z is simplified to the closely approximate form 

(from p. 1 ; for metric vmits) 

760 760 



Z-Z 



18400 (^ log -^ -log ^ 

^ /. r, <^ / N Z + 2ho 

0.00367^ + 0.378-^ +(y + rj)+ ^ 



wnere the terms are as defined on pp. xliv-xlvi. 

Again calling the terms in the bracket (a), (b) , (c) and (d), respectively, 
to compute Bq we have : 

from Table 59, with ^=1379 n^- and ^=I2?3 C, Z(a) =62 

from Table 60, with Z=i379 m. and e = g mm., Z{b)= 7 

from Table 62, with ^=1379 m. and (/) = 32°, Z(f ) = 5^ 

from Table 63, with Z=i379 m. and Iio = o, Z{d)= o 

Z[{a) + {b) + {c) + (d)], =^ 
Since Z=i379 m., we have 

18400 (^ log -^ -log-^j =1379-74= 1305- 
From Table 56 for ^ = 655. 7 mm., we have 18400 log-p— =1179, hence 
18400 log ^ =1179- 1305= -126. 

■Do 

Referring to Table 56 for the value of Bo corresponding to this, we find 
B = 772.1 mm. 

There are no difficulties connected with the use of these tables to reduce 
barometric readings to sea level, but serious difficulties are often encountered 
in attempting to determine and e from observations at the elevated station 
only (see pp. xxxiii and Ixxii). 



1 Indicated values for latitude and gravity correction apply only to mercurial ba- 
rometers. For the case of aneroid barometers the v is omitted (see pp. xlviii and xlix). 



xHv INTRODUCTION. 

TABLES FOR DETERMINING HEIGHTS, AND CONVERSIONS 
INVOLVING GEOPOTENTIAL. 

THE HYPSOMETRIC FORMULA AND ITS CONSTANTS. 

The fundamental formula for reducing the barometer to sea level and 
for determining heights by the barometer is the original formula of Laplace, 
amplified into the following form — 

or, where gi, the value of local gravity is unknown, 

(2) Z = K{i+ad)(-—^ \i+kcos2cl>-k'cos^-2 4>^C)fi+^-^^)\og^ 

in which h = Height of the upper station. 

ho = Height of the lower station. 

Z = h — Jiq. 

p = Atmospheric pressure at the upper station. 

po = Atmospheric pressure at the low^er station. 

R = Mean radius of the earth. 

6 = Mean temperature of the air column between the alti- 
tudes h and Iiq. 

e = Mean pressure of aqueous vapor in the air column. 

b = Mean barometric pressure of the air column. 

(}> = Latitude of the stations. 

K = Barometric constant. 

a = Coefficient of the expansion of air. 

k and k' — Constants depending on the figure of the earth. 

C = Constant = the ratio ^JUZl^ . 

9. 
Qq = Standard value of gravity = 980.665 dynes. 
gi = Local value of gravity. 

The pressures p^ and p are computed from the height of the column of 

mercury at the two stations; the ratio ~ of the barometric heights may be 

. p . ^ 

substituted for the ratio — , if -Sq and B are reduced to the values that would 

P 
be measured at the same temperature and under the same relative value 
of gravity. 

The correction of the observed barometric heights for instrumental 
temperature is always separately made, but the correction for the variation 
of gravity with altitude is generally introduced into the formula itself. 

If Bq, B represent the barometric heights corrected for temperature 
only, we have the equation 

p, B,( Z\ 



TABLES FOR DETERMINING HEIGHTS. xlv 

IJ. being a constant depending on the variation of gravity with altitude 
1 ^ = 0.0000003 ), and 



log^° = logf + log(l+4) 



7 

Since —- is a very small fraction, we may write 

XV 



Nap. log^i +^j 
M being the modulus of common logarithms. 



fa„d.og(:+f) = f... 



By substituting for Z its approximate value Z = X log -^, we have 
With these substitutions the barometric formula becomes 

(2) Z = K(i + ad)f ^ -Vi+/fecos2^-^'cos22</, + C)fi+^^^^)x 

Vi- 0.378^/ \ ^ J 

(.+fi/),o4». 

As a further simplification we shall put 

/3 == 0.3787 , y = k cos 2 (j) - k' cos^ 2(t> + C and rj = — M, 
and write for the second form, (2), the formula — 

Z = K{i + ae) (^) (I + y) (i + ^^°) (I + ^) log§. 

Values of the constants. — The barometric constant iiC is a complex 
quantity defined by the equation 

^ X B„ 



K 



d X M 



Bn is the normal barometric height of Laplace, 760 mm. 

A is the density of mercury at the temperature of melting ice. The 
value adopted by the International Meteorological Committee, and which 
has been employed in previous editions of these tables is A = 13-5956. The 



Xlvi INTRODUCTION. 

most probable value, taking into account the recently determined relation 
between the liter and the cubic decimeter,^ is as already stated, A = 13.5951 
and this value is here adopted. 

8 Is the density of dry air at o°C under the pressure of a column of 
mercury B,i and under standard gravity. The value adopted by the In- 
ternational Bureau of Weights and Measures for air under the above con- 
ditions and free from CO2 is S =0.0012928 grams per cubic centimeter.^ 
This is in close agreement with the value (8 = 0.00129278) used in pre- 
vious editions of these tables. For air containing 4 parts in loooo of CO, 
it gives a density of 0.00129307, and for air containing 3 parts in loooo 
of CO., the proportion adopted by Hann,^ it gives a density of 0.00129301. 
Therefore, the value adopted for the density of air containing an average 
amount of CO2 is 

5 = 0.0012930 

M (Modulus of common logarithms) = 0.4342945. These numbers 
give for the value of the barometric constant 

K = 18400 meters. 

For the remaining constants, the following values have been used: 
a = 0.00367 for 1° Centigrade. (International Bureau of Weights and 

Measures: Travaiix et Memoires, t. I, p. A. 54.) 

y = k cos 24> — k' COS" 2(t> + C = 0.002640 cos 2<t> — O.OOOOO7 COS^ 2(t> + 

0.000045 
R ■= 6367324 meters. (A. R. Clarke: Geodesy, 8°, Oxford, i< 



n = — -^ =0.002396. (Ferrel: Report Chief Signal Officer, 1885, pt. 2, 
R 

pp. 17 and 393.) 

TABLES 61, 52, 63, 64, 55. 
THE DETERMINATION OF HEIGHTS BY THE BAROMETER. 

Tables 51 , 52, 53, 54, 55. 

English Measures. 

Since a barometric determination of the height will rarely be made at 
a place where gi is known, the discussion which follows will be confined to 
the second form of the barometric formula developed in the preceding sec- 
tion (see ])age xlv). For convenience in computing heights it is arranged 
in the following form: 



Z ^ K{\ogB,-\ogB] 



(l + a^) 

(1+^) 

(I + kcoS2(f> - k'cOS^2 4>-\-C){l + r,) 
Z + 2 //, 



I + 



R 



1 Comptes Rendus, Quatrieme Conference Generale Poids et Mesures, 1907, pp. 60-61. 

2 Leduc, A. La masse du litre d'air dans les conditions nonnales. Comite international 
des poids et mesures. Travaux et memoires, T. 16, 1917. 

^ Lehrbuch der Meteorologie, dritte Auflage, 1915, s. 5. 



TABLES FOR DETERMINING HEIGHTS. 



xlvii 



in which K (log B^ — log B) is an approximate value of Z and the factors 
in the brackets are correction factors depending respectively on the air 
temperature, the humidity, the variation of gravity with latitude, the 
variation of gravity with altitude in its effect on the weight of mercury in 
the barometer, and the variation of gravity with altitude in its effect on the 
weight of the air. With the constants already given, the formula becomes 
in English measures: 



Z (feet) = 60368 1 (log 5o- log 5) 



[1 + 0.002039 {d - 32°)] 

(1+^) 

( I + 0.002640 cos 2 — 0.000007 COS' 2 
+ 0.000045) (l + 0.00239) 

(-^^°) 



In order to make the temperature correction as small as possible for 
average air temperatures, 50° F. will be taken as the temperature at which 
the correction factor is zero. This is accomplished by the following trans- 
formation : 

I + 0.002039 (d - 32°) = [i + 0.002039 {d - 50°)] [i + 0.0010195 X 36°]. 

The second factor of this expression combines with the constant, and 
gives 60368 (i +0.0010195 X 36°) = 62583.6. 
The first approximate value of Z is therefore 

62583.6 (log 5o -log 5). 

In order further to increase the utility of the tables, we shall make a 
further substitution for log Bq — log B, and write 

62583.6 (log Bo- log B) = 62583.6 (log ^ - log ^"^ 

Table 51 contains values of the expression 

29.9 



62583.6 log 



B 



for values of B varying by intervals of o.oi inch from 12.00 inches to 30.90 
inches. 

The first approximate value of Z is then obtained by subtracting the 
tabular value corresponding to B^ from the tabular value corresponding to 
B (B and B^ being the barometric readings observed and corrected for 
temperature at the upper and lower stations respectively). 

Table 52 gives the temperature correction 

Z X 0.002039 ( d- 50°). 



1 In accordance with the relation between the meter and the foot given on p. xxiii, this 
constant should be 60367. (See Table 14.) 



xlviii 



INTRODUCTION. 



The side argument is the mean temperature of the air column (6) given 
for intervals of i° from o° to ioo° F. The top argument is the approximate 
difference of altitude Z obtained from Table 51. 

For temperatures above 50° F., the correction is to be added, and for 
temperatures below 50° F., the correction is to be subtracted. It will be 
observed that the correction is a linear function of Z, and hence, for exam- 
ple, the value for Z = 1740 is the sum of the corrections in the columns 
headed 1000, 700, and 40. 

In general, accurate altitudes cannot be obtained unless the tempera- 
ture used is freed from diurnal variation. 

Table 53 gives the correction for gravity, and for the effect of the vari- 
ation of gravity with altitude on the weight of the mercury. When alti- 
tudes are determined with aneroid barometers the second factor does not 
enter the formula. In this case the effect of the latitude factor can be ob- 
tained by taking the difference between the tabular value for the given lati- 
tude and the tabular value for latitude 45° 29'. The side argument is the 
latitude of the station given for intervals of 2°. The top argument is the 
approximate difference of height Z. 

Table 54 gives the correction for the average humidity of the air at 
different temperatures. In evaluating the humidity factor as a function 
of the air temperature, the tables given by Prof. Ferrel have been adopted 
{Aleteorelogical researches. Part in. — Barometric hypsometry and reduction 
of the barometer to sea level. Report, U.S. Coast Survey, 1881. Appendix 
10.) These tables by interpolation, and by extrapolation below o°F., give 
the following values for jS: 

For Fahrenheit temperatures, 



e 


^ 


e 


/3 


e 


/3 


e 


^ 


F. 




F. 




F. 




F. 




— 20° 


0.00008 


10° 


0.00104 


36° 


0.00267 


62° 


0.00724 


— 16 


.00020 


12 


.00111 


38 


.00293 


64 


.00762 


— 12 


.00032 


14 


.00118 


40 


.00322 


66 


.00801 


- 8 


.00044 


16 


.00126 


42 


•00353 


68 


.00839 






18 


.00134 


44 


.00386 


70 


.00877 


- 6 


0.00050 


20 


.00143 


46 


.00421 


7- 


.00914 


- 4 


.00056 


22 


•00153 


48 


.00458 






— 2 


.00062 


24 


.00163 


50 


.00496 


76 


0.00990 





.00068 


26 


.00174 


52 


•00534 


80 


.01065 


+ 2 


.00075 


28 


.00187 


54 


•00572 


84 


.01141 


4 


.00082 


30 


.00203 


56 


.00610 


88 


.01217 


6 


.00089 


32 


.00222 


5S 


.00648 


92 


•01293 


8 


.00096 


34 


.00243 


60 


.00686 


96 


•01369 



This correction could have been incorporated with the temperature 
factor in Table 52, but it is given separately in order that the magnitude 
of the correction may be apparent, and in order that, when the actual hu- 



TABLES FOR DETERMINING HEIGHTS. xlix 

midity is observed, the correction may be computed if desired, by the ex- 

Z (0.378 I) 



pression 



where e is the mean pressure of vapor in the air column, and h the mean 
barometric pressure. 

The side argument is the mean temperature of the air column, varying 
by intervals of 2° from — 20° F. to 96° F., except near the extremities of the 
table where the interval is 4°. The top argument is the approximate differ- 
ence of altitude Z, 

Table 55 gives the correction for the variation of gravity with altitude 
in its effect on the weight of the air. The side argument is the approximate 
difference of altitude Z, and the top argument is the elevation of the lower 
station h^. 

The corrections given by Tables 53, 54, and 55 are all additive. 

Example: 

Let the barometric pressure observed, and corrected for temperature, 
at the upper and lower stations be, respectively, B =23.61 and 
Bq = 29.97. Let the mean temperature of the air column be 35° 
F., and the latitude 44° 16'. To determine the difference of height. 

Table 51, argument 23.61, gives 
Table 51, " 29.97, " 

Approximate difference of height (Z) 
Table 52, with Z = 6484 and Q = 35° F., gives 
Table 53, with Z = 6300 and </> = 44°, gives 
Table 54, with Z = 6300 and 6 = 35° F., gives 
Table 55, with Z = 6300 and ho = o, gives 

Final difference of height (Z) = 6320 

If in this example the barometric readings be observed with aneroid 
barometers, the correction to be obtained from Table 53 will be simply the 
portion due to the latitude factor, and this will be obtained by subtracting 
the tabular value for 45° 29' from that for 44°, the top argument being 
Z = 6300. This gives 16 — 15 = i. 

Tables 56, 57, 58, 59, 60, 61 , 62, 63. 

Metric and Dynamic Measures. 

The barometric formula developed on page xlvi is, in metric and dyna- 
mic units, 

4 





Feet. 




6420 


— 


64 


= 


6484 


- 


198 


+ 


16 


+ 


16 


+ 


2 



INTRODUCTION. 



Z (meters) = 18400 (log 5o- log -B) (1 + 0.00367 dC.) 

(1 + 0.378S 

(l + 0.002640 cos 2 (f) —0.000007 COS^ 2 (f> 

+ 0.000045) (l + 0.00239) 

/ Z + 2ho \ 

_V 6 367 324^ 

The approximate value of Z (the difference of height of the upper and 
lower station) is given by the factor 18400 (log B^ — log B). This expres- 
sion is computed by means of two entries of a table whose argument is the 
barometric pressure. In order that the two entries may result at once in an 
approximate value of the elevation of the upper and lower stations, a trans- 
formation is made, which gives the following identities: 



18400 (log Bo - log B) = 18400 hog ^ - log ^ j 
and 18400 (log Bo - log B) = 18400 ( log 



Metric measures. 
Dynamic 



measures. 



760 



Table 56 gives values of the expression 18400 log ^-— for values of B 

varying by intervals of i mm. from 300 mm. to 779 mm. The first approxi- 
mate value of Z is then obtained by subtracting the tabular value corre- 
sponding to Bq from the tabular value corresponding to B {B and B^ being 
the barometric readings observed and reduced to 0° C. at the upper and 
lower stations respectively). The first entry of Table 56 with the argu- 
ment B gives an approximate value of the elevation of the upper station 
above sea level, and the second entry w'ith the argument B^ gives an ap- 
proximate value of the elevation of the lower station. 

1013.3 
Table 57 gives values of the expression 18400 log — —^ for values of 

B 

B varying by intervals of i mb. from o mb. to 1049 mb. The approximate 
value of Z is then obtained by subtracting the tabular value corresponding 
to Bq from the tabular value corresponding to B (B and B^ being the baro- 
metric readings observed and reduced to 0° C. at the upper and lower sta- 
tions respectively). The first entry of Table 57 with the argument B gives 
an approximate value of the elevation of the upper station above sea level, 
and the second entry w'ith the argument B^ gives an approximate value of 
the elevation of the lower station. 

Table 58 gives the temperature correction factor, a =0.00367^, for 
each tenth of a degree centigrade, from 0° C. to 50.9° C. To find the cor- 
rection corresponding to any mean temperature of the air column, 6, mul- 
tiply the approximate altitude as determined from Table 56 or 57 by the 
value of a obtained from this table, and add the result if 6 is above 0° C; 
subtract, if below 0° C. 



TABLES FOR DETERMINING HEIGHTS. H 

Attention is called to the fact that the formula is linear with respect 
to 0, and hence that the correction, for example, for 59?8 C. equals the cor- 
rection for 50?8 plus the correction for 9° or .186 + .033 = .219, and is to 
be added. 

Table 59 is an amplification of Table 58 and gives the temperature 
correction 0.00367 6 X Z. 

The side argument is the approximate difference of elevation Z and 
the top argument is the mean temperature of the air column. The values 
of Z vary by intervals of 100 m. from 100 to 4000 meters and the tempera- 
ture varies by intervals of 1° from i° C. to 10° C. with additional columns 
for 20°, 30°, and 40° C. This formula also is linear with respect to 6, and 
hence the correction, for example, for 27° equals the correction for 20° plus 
the correction for 7°. When the table is used for temperatures below 0° C. 
the tabular correction must be subtracted from, instead of added to, the 
approximate value of Z. 

Table 60 (pp. 148 and 149) gives the correction for humidity resulting 

from the factor 0.378 y X Z = /3 Z. 


Page 148 gives the value of 0.378 r multiplied by loooo. The side argu- 



ment is the mean pressure of aqueous vapor, e, which serves to repre- 
sent the mean state of humidity of the air between the two stations. 
^ = 2(^1 + ^o) (^i and Co being the vapor pressures observed at the two sta- 
tions) has been written at the head of the table, but the value to be as- 
signed to e is in reality left to the observer, independently of all hypothesis. 
The top argument is the mean barometric pressure ^ {B -\- B^. 

The vapor pressure varies by millimeters from i to 40, and the mean 
barometric pressure varies by intervals of 20 mm. from 500 mm. to 760 mm. 

The tabular values represent the humidity factor ^, or 0.378 -, multiplied by 

lOOOO. 

Page 149 gives the correction for humidity, with Z and lOOOO X 0.378 - 
(derived from page 148) as arguments. 

The approximate difference of altitude is given by intervals of lOO 
meters from lOO to 4000 meters, with additional lines for 5000, 6000, and 
7000 meters. The values of lOOOO /3 vary by intervals of 25 from 25 to 300. 
The tabular values are given in tenths of meters to facilitate and increase 
the accuracy of interpolation. 

Table 61. Humidity correction : Value of - ( '' ). It has been 

2 \o.oo367/ 

found advantageous to express the humidity term, jSZ, as a correction to 

the temperature term, ad Z. 

Let aA^Z = /3Z; then, AQ = ^ = 0-378& ^ 

0- 0.00367 



lii INTRODUCTION. 

For convenience in computing, the tabulated values of A are for 

_ ( -1 ^^ ^ Y The side and top arguments are air and vapor pressures, re- 
2 \o .00367 ) 

spectively, in mm. on p. 150 and in mb. on p. 151. Instead of computing 
A 6 from the mean of the values of B and e at the upper and lower stations 
it is computed for each station separately, and the sum of the two deter- 
minations is added to 6. 

Table 62 gives the correction for gravity, and for the effect of the 
variation of gravity with altitude on the weight of the mercurial column. 
When altitudes are determined with aneroid barometers the latter factor 
does not enter the formula. In this case the effect of the latitude factor can 
be obtained by subtracting the tabular value for latitude 45° 29' from the 
tabular value for the latitude in question. 

The side argument is the approximate difference of elevation Z varying 
by intervals of 100 meters from 100 to 4000, and by 500 meters from 4000 
to 7000. The top argument is the latitude, varying by intervals of 5° from 

o°to75.° 

Table 63 gives the correction for the variation of gravity with altitude 

in its effect on the weight of the air. 

The side argument is the same as in Table 62 ; the top argument is the 
height of the lower station, varying by intervals of 200 meters from o to 
2000, with additional columns for 2500, 3000 and 4000 meters. 

The corrections given in Table 62 and Table 63 apply to the approxi- 
mate heights computed from metric or dynamic measures by the use of 
Tables 56 to 61, inclusive, and are additive. 

Example: (Metric Measures.) 

Let the barometric reading (reduced to 0° C.) at the upper station be 
655.7 mm. ; at the lower station, 772.4 mm. Let the mean tempera- 
ture of the air column be 9 =12.3 C, the mean vapor pressure g = 
9 mm. and the latitude </> = 32°. 
Table 56, with argument 655.7, gives 1179 meters. 

Table 56, " " 7724, " - 129 

Approximate value of Z = 1308 

Table 59, with Z ^ 1308 and B = I2°3 C, gives 59 

Table 60, with g = 9 mm. and Z = 1370, gives 7 

Table 62, with Z = 1370 and = 32°, gives 5 

Table 63, with Z = 1370 and /?o = o, gives o 

Corrected value of Z = 1379 meters. 

Example : (Dynamic Measures.) 

Let the barometer reading (reduced to 0° C.) at the upper station be 
448.6 mb.; at the lower station, 1000.3 mb. Let the vapor pres- 



GEOPOTENTIAL : DYNAMIC HEIGHTS liii 

sure at the upper station be 2.4 mb. ; at the lower station 7.3 mb. 

Let the mean temperature of the air column be ^=:5?8 C. and the 

latitude </) = 39° 25' N. 
Table 57, with argument 448.6, gives 65 11 meters. 

Table 57, with argument 1000.3, gives 104 

Approximate value of Z 6407 meters. 

Table 61, with arguments 449 and 2.4 gives A^ = o.3 
Table 61, with arguments 1000 and y.;^ gives A^ = o.4 
Table 58, with 6 = 5°8 + o?7 = 6?5, and 2 = 6407 gives 

6407x0.024= 154 

Table 62 with 2 = 6561 and <^= 39° 25', gives 19 

Table 63 with 2 = 6561 and ho = o, gives 7 

Corrected value of Z =6587 meters. 

GEOPOTENTIAL : DYNAMIC HEIGHTS. 

In accordance with the " Reglement " ^ of the Commission Internationale 
de la Haute Atmosphere adopted at the meeting held in London in April, 1925, 
heights in all forms and publications of the International Commission are to 
be measured as " geopotentials " in " dynamic meters " above sea level. 

The geopotential or gravity potential of a point is defined numerically 
as the value of the potential energy relative to sea level of a unit-mass situated 
at the point. 

The application of geopotential as a measure of height becomes more 
evident when it is seen that surfaces of equal geopotential are identical with 
horizontal or level surfaces, and due to the geographical variation of gravity, 
they are not surfaces equally distant from sea level. In this regard it may be 
emphasized that energy is involved in displacing a mass of air from one 
position to another in which the potential energy of the mass is different, 
whereas the displacement of air may take place along horizontal or equi- 
geopotential surfaces without the gain or expenditure of potential energy 
once the air is in a state of uniform motion. The latter statement, on the 
contrary, does not hold for surfaces of equal geometric height above sea level. 

For the purposes of dynamical meteorology, in making comparisons of 
vertical positions, certain advantages are derived by defining the height of 
points above sea level in terms of geopotential. Heights measured in this way 

1 A fuller account of this Reglement may be found in the Avant-Propos of the Com- 
mission Internationale de la Haute Atmosphere, Comptes Rendus des Jours Internation- 
aux 1923, published in 1927. This may be had on application to the Secretary of this 
Commission, c/o the Royal Meteorological Society, London. 



liv INTRODUCTION. 

are called " dynamic heights," after Prof. V. Bjerknes/ and indicate relative 
potential energies of unit-mass. Thus, points of equal " dynamic height " lie 
in horizontal or geopotential surfaces. 

The geopotential of a point, from the definition, is equal to the work 
done in lifting a unit-mass from sea level to the point, and is defined precisely 
by the expression : 



(I) T=-\\dh 

i o 



where 5r= acceleration of gravity 

and /z = geometric height of the point above sea level. 

The dimensions of geopotential in the absolute system are P/t-. Follow- 
ing the proposal of Prof. Bjerknes,^ the unit of dynamic height is called the 
" dynamic meter " and has the magnitude lO nf/s&c^ where g is measured in 
w/sec-, and h in meters. 

The unit is chosen with this magnitude for convenience, since a change 
in elevation of one meter geometric height produces a change in dynamic 
height of approximately 98 per cent of one " dynamic meter," i. e., within the 
range of the majority of present atmospheric observations. 

CALCULATION OF DYNAMIC HEIGHTS. 

Equation (i) may be solved by substituting in it Helmert's ^ equation 
for the decrease of acceleration of gravity with height : 

(2) 9= — (5^0—0.000003086 h) 

where 

g,p = acceleration of gravity below given point at sea level, in 7n/sec-. 
(7 = acceleration of gravity at point whose elevation is Ji above sea level. 
/i= geometric height in meters, above sea level. 

The minus sign is used because gravity is directed downwards and heights 
are measured upwards positively. 
Equation ( i ) becomes : 

I f '' 

(3) Ha= — (^r,^, — 0.000003086/06^/1 

10 J O 

where //d = dynamic height, in dynamic meters. 

1 The claim for the use of geopotential in measuring heights was set forth by Prof. V. 
Bjerknes and his collaborators in Vol. I of Dynamical Meteorology and Hydrography, 
published in English in 1910 by the Carnegie Institution of Washington. The terms 
" dynamic height " and " dynamic meter " were therein proposed. 

- Helmert : tjber die Reduction der auf der physischen Erdoberflache beobachteten 
Schweerebeschleunigungen auf ein gemeinsames Niveau, Zweite Mitteilung. Sitzungsbe- 
richte der Akademie der Wissenschaften, Berlin, 1903, p. 650. 



GEOPOTENTIAL : DYNAMIC HEIGHTS Iv 

The factor — is substituted in eq. (i) to convert to units of dynamic 

height in dynamic meters (lo ywVsec"). 
Integrating (3), we obtain 

(4) Hd= ^h-l.543XIO-'h- 

For a first approximation, we may neglect the term in h~ and take 
g^ =9.8 ;n/sec-, 

whence 

(5) //d= 0.98 /z, approximately, 

and (6) h=i.02 Ha, approximately. 

Geometric heights (Ji) may be expressed in terms of dynamic heights 
(Hd) by a convenient approximate relationship. 
Substituting (6) in the h~ term of (4) we obtain 

(7) h= — H^+ — 1.543(1.02)- • 10- • Ha 

94> 9<P 

which is simplified for computation by taking 9.8062 as g^ in the second 
term, this being the mean value at latitude 45° and sea level. 
Thus (7) becomes 

(8) h= — H,i+ 1.637 X ^o-Urll approximately. 

We are indebted to Prof. V. Bjerknes and his collaborators for the above 
formulation, and for tables 64, 65, 67 and 68, which are copied directly from 
their " Dynamical Meteorology and Hydrography." ^ 

DESCRIPTION AND USE OF TABLES 64 TO 68 INCLUSIVE, 

The purpose of these tables is to convert from geometric heights to 
dynamic heights and vice versa. Tables 64, 65, and 66 are used to convert 
geometric meters to dynamic meters. Tables 66, 67, and 68 are used to convert 
dynamic meters to geometric meters. 

Table 64. Heights reduced from meters to dynamic meters, the accelera- 
tion of gravity at sea level being 9.80. 

This table, computed by means of equation (4) above, makes possible 
the reduction of geometric heights to dynamic heights, the acceleration of 
gravity at sea level being 9.80 m/sec^. In this table the side argument is geo- 
metric height above sea level by intervals of 1000 m., and the top argument 
is geometric height by intervals of 100 m. The proportionality table at the 
foot of the main table makes it possible to obtain dynamic heights correspond- 
ing to any integral number of geometric meters from o to 30,000. 

^ Bjerknes, V., and colleagues, Carnegie Inst, Washington, 1910. 



Ivi INTRODUCTION. 

Table 65. Corrections to Table 64 for values of the acceleration of graV" 
ity at sea level different from 9.80. 

This table is computed from a modification of equation (4) arranged 
to give the increments of dynamic height corresponding to changes in g,p from 

9.80 m/sec". This form is //d= (0.980 /; — 1.543 x lO"' /r) + — — ~ — h 
the latter factor being the increment. 

Corrections obtained from this table are applied to values obtained from 
Table 64 for stations whose latitude is such that g,p differs from 9.80 ;n/sec-. 
The side argument here is geometric height by intervals of 1000 m. and the 
top argument is g^, the acceleration of gravity at sea level. Interpolations 
must be made for geometric heights which are not in even km. and for values 
of g,p which lie between the values given at the top. 

Table 66. Normal value of the acceleration of gravity at sea level. 

This table has been computed by means of the U. S. Coast and Geodetic 
Survey Formula 

^0 = 9.80621 ( I —0.002640 cos 2 (^ + 0.000007 cos- 2 ^) 

where 

^0= normal value of acceleration of gravity in m/sec~ at latitude ^ at sea level. 

and <j)= latitude in degrees. 

The side argument is latitude by intervals of 10°, and the top argument 
is latitude by unit degrees from o to 9. Thus the value of gtp may be obtained 
for every degree of latitude. For stations whose latitude cannot be expressed 
in whole degrees, interpolations may be made for fractional parts of degrees, 
or reference may be made to Table 90. 

Table 67. Heights reduced from dynamic meters to geometric meters, 
the acceleration of gravity being 9.80. 

This table, computed by means of equation (8) converts dynamic heights 
to geometric heights, where (70=9.80 vi/stc-. The side argument is dynamic 
height by intervals of 1000 dynamic meters and the top argument is dynamic 
height by intervals of 100 dynamic meters. A proportionality table is added 
as in Table 64. 

Table 68. Corrections to Table 67 for values of the acceleration of grav- 
ity at sea level different from 9.80. 

This table is computed from a modification of equation (8). The modi- 
fied form employed is 

(8a) h= (-^//,+ i.637Xio-^//^) + 9-^g~^^ H, 

^ ^ \9.80 ^ / 0.98 g^ 



TABLES FOR DETERMINING HEIGHTS IvH 

Table 6^ represents values obtained from the expression within the 
parentheses and Table 68 represents values computed from the latter factor, 
taking 0.98 g^ as equal to 9.60 for a close approximation of the denominator. 
This table thus gives increments of geometric height which are applied as 
corrections to values obtained from Table (ij for stations whose acceleration 
of gravity at sea level differs from 9.80. The side argument is dynamic 
height by intervals of 1000 dynamic meters and the top argument is g^, accel- 
eration of gravity, by intervals of o.oi 7;;/sec.- Interpolations must be made 
for dynamic heights which are not in even thousands and for values oi g 4, 
lying between those given at the top. 

Table 69. Difference of height corresponding to a change of O.i inch in the 
barometer — English measures. 

If we differentiate the barometric formula, page xlvii, we shall obtain, 
neglecting insensible quantities, 

(/Zz= -26281-^(1 +0.002039(^-32°)) (I+/3), 

in which B represents the mean pressure of the air column dZ. 
Putting dB = 0.1 inch, 

2628.1 



dZ=- 



^i +0.002039(^-32°) j(i+^), 



B 

The second member, taken positively, expresses the height of a column 
of air in feet corresponding to a tenth of an inch in the barometer under 
standard gravity. Since the last factor (i+j8), as given on page xlviii, is a 
function of the temperature, the function has only two variables and admits 
of convenient tabulation 

Table 69, containing values of dZ for short intervals of the arguments 
B and 6, has been taken from the Report of the U. S. Coast Survey, 1881, 
Appendix 10, — Barometric hypsouictry and reduction of the barometer to sea 
level, by Wm. Ferrel.^ 

The temperature argument is given for every 5° from 30° F. to 85° F., 
and the pressure argument for every 0.2 inch from 22.0 to 30.8 inches. 

This table may be used in computing small differences of altitude, and, 
up to a thousand feet or more, very approximate results may be obtained. 

1 Due to the use of a slightly different value for the coefficient of expansion, Prof. 
Ferret's formula, upon which the table is computed, is 

2628.4 , 



dZ= ^ 



I1+ 0.002034 (e - 32°) j (I + /3). 



Iviii INTRODUCTION. 

Example : 

Mean pressure at Augusta, October, 1891, 29.94; temperature, 60.8 F. 
Mean pressure at Atlanta, October, 1891, 28.97; temperature, 59?4 
Mean pressure of air column B = 29.455; S = 6o°i 

Entering the table with 29.455 and 60.1 as arguments, we take out 
94.95 as the difference of elevation corresponding to a tenth of an inch dif- 
ference of pressure. Multiplying this value by the number of tenths of 
inches difference in the observed pressures, viz. 97, we obtain the difference 
of elevation 921 feet. 

TABLE 70. 

Table 70. Difference of height corresponding to a change of one millimeter 
in the barometer — Metric measures. 

This table has been computed by converting Table 69 into metric units. 
The temperature argument is given for every 2° from — 2° C. to + 36° C; 
the pressure argument is given for lo-mm. intervals from 760 to 560 mm. 

TABLE 71. 

Table 71 . Babinet's formula for determining heights by the barometer. 

Babinet's formula for computing differences of altitude 1 represents 
the formula of Laplace quite accurately for differences of altitude up to 1000 
meters, and within one per cent for much greater altitudes. As it has been 
quite widely disseminated among travelers and engineers, and is of con- 
venient application, the formula is here given in English and metric meas- 
ures. It might seem desirable to alter the figures given by Babinet so as to 
conform to the newer values of the barometrical constants now adopted; 
but this change would increase the resulting altitudes by less than one-half 
of one per cent without enhancing their reliability to a corresponding degree, 
on account of the outstanding uncertainty of the assumed mean temperature 
of the air. 

The formula is, in English measures, 

Z (feet) = 52494 [i + ,00 J K+B' 

and in metric measures, 

2 (/o + /)1 Bo-B 



Z (meters) = 16000 i + 



1000 J Bo-\- B' 



in which Z is the difference of elevation between a lower and an upper 
station at which the barometric pressures corrected for all sources of in- 
strumental error are Bq and B, and the observed air temperatures are ^^ 
and /, respectively. 

For ready computation the formula is written 

^ ^^Bo+B' 
1 Comptes Rendus, Paris, 1850, vol. xxx., page 309, 



TABLES FOR DETERMINING HEIGHTS. llX 

and the factor C, computed both in EngHsh and metric measures, has been 
kindly furnished by the late Prof. Cleveland Abbe. The ^argument is 
^ (/ + given for every 5° Fahrenheit between 10 and lOO F., and for 
eveAr 2° Centigrade between - 10° and 36° Centigrade. 

In using the table, it should be borne in mind that on account of the 
uncertainty in the assumed temperature, the last two figures in the value o 
C are uncertain, and are here given only for the sake of convenience of 
interpolation. Consequently one should not attach to the resulting altitudes 
a greater degree of confidence than is warranted by the accuracy of the 
temperatures and the formula. The table shows that the numerical factor 
changes by about one per cent of its value for every change of five degrees 
Fahrenheit in the mean temperature of the stratum of air between the 
upper and lower stations; therefore the computed difference of altitude will 
have an uncertainty of one per cent if the assumed temperature of the air 
is in doubt by 5°F. With these precautions the observer may properly 
estimate the reliability of his altitudes whether computed by Babinet s 
formula or by more elaborate tables. 

Example: 

Let the barometric pressure observed and corrected for temperature at 
the upper and lower stations be, respectively, B = 635 mm.^and 
Bo = 730 mm. Let the temperatures be, respectively, t- 15 (--, 
t°= 2O0 C. To find the approximate difference of height. 

^jth \ (/o+ t) = ^^°^ ^^° = ^7°5 ^^ ^^'^ ^^^^^ ^" "^^^""'^ measures gives 



Bo-B _ _95_ 
C =17120 meters. ^;qr^ " 1365- 



95 _ 



The approximate difference of height = 17120X ^^ = ii9i-5 meters. 

THERMOMETRICAL MEASUREMENT OF HEIGHTS BY OBSERVATION OF THE 
TEMPERATURE OF THE BOILING POINT OF WATER. 

When water is heated in the open air, the elastic force of its v^por 
gradually increases, until it becomes equal to the incumbent weight of the 
atmosphere Then, the pressure of the atmosphere being overcome, the 
lam escapes rapidly in large bubbles and the water boils. The tempera- 
ture at whkh water boils in the open air thus depends upon the weight of 
the atmospheric column above it, and under a less barometric pressure the 
water will boil at a lower temperature than under a greater pressure. Now, 
a. 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 made, the lower will be the temperature of the boiling point. 

The difference of elevation between two places therefore can be de- 



Ix INTRODUCTION. 

duced trom the temperature of boiling water observed at each station. It is 
only necessary to find the barometric pressures which correspond to those 
temperatures, and from these to compute the difference of height by the 
tables given herein for computing heights from barometric observations. 

From the above, it may be seen that the heights determined by means 
of the temperature of boiling water are less reliable than those deduced 
from barometric observations. Both derive the difference of altitude from 
the difference of atmospheric pressure. But the temperature of boiling 
water is a less accurate measurement of the atmospheric pressure than is 
the height of the barometer. In the present state of thermometry it would 
hardly be safe, indeed, to rely, in the most favorable circumstances, upon 
quantities so small as hundredths of a degree, even when the thermometer 
has been constructed with the utmost care; moreover, the quality of the 
glass of the instrument, the form and substance of the vessel containing the 
water, the purity of the water itself, the position at which the bulb of the 
thermometer is placed, whether in the current of the 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 
pressure. Owing to these various causes, an observation of the boiling point, 
differing 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 millimeters 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 millimeter, making a difference of 3 feet 
in altitude. 

Notwithstanding these imperfections, the hypsometric thermometer is 
of the greatest utility to travellers and explorers in rough countries, on 
account of its being more conveniently transported and much less liable 
to accidents than the mercurial barometer. A suitable form for it, designed 
by Regnault {Annales de Chimie et de Physique, Tome xiv, p. 202), consists 
of an accurate thermometer with long degrees, subdivided into tenths. 
For observation the bulb is placed about 2 or 3 centimeters above the 
surface of the water, in the steam arising from distilled water in a cylin- 
drical vessel, the water being made to boil by a spirit-lamp. 

TABLES 72. 73. 

Barometric pressures at standard gravity corresponding to the tcuiperatiire 
of boiling zvater. 

Table 72. Englisli Measures. 
Table 73. Metric Measures. 

Table 72 is copied directly from Table 75. The argument is the tem- 
perature of boiling water for every tenth of a degree from i85?o to 2i4°9 
Fahrenheit. The tabular values are given to the nearest o.ooi inch. 



HVGROMETRICAL TABLES. 1x1 

Table 73 is copied directly from Table j"]. The argument is given for 
every tenth of a degree from 8o°o to 1009 C. The tabular values are given 
to the nearest O.oi mm. 

HYGROMETRICAL TABLES. 

PRESSURE OF SATURATED AQUEOUS VAPOR. 

In former editions of these tables the values of aqueous vapor pressures 
at temperatures between — 29° and 100° C. were based upon Broch's re- 
duction of the classic observations of Regnault. {Travaux et Memoir es 
du Bureau international des Poids et Mesures, t. I, p. A 19-39). In these 
computations the same continuous mathematical function was employed 
to calculate the values of vapor pressure both above and below the point 
of change of state on freezing. This resulted in a systematic disagreement 
between observed and computed vapor pressures below the freezing point, 
and confirmed the inference from the laws of diffusion following from the 
kinetic theory of gases, namely, that the pressure of the vapor is different ac- 
cording as it is in contact with its liquid or its solid. 

Seeking to remove the uncertainty of the values of vapor pressures at 
temperatures below freezing, Marvin (Annual Report Chief Signal Ofificer, 
1 891, Appendix No. 10) made direct experimental determinations thereof, 
in the course of which the specimens of water were cooled to temperatures 
of from — 10° to — 12° C. while still retaining the liquid state, thus af- 
fording opportunity for measurements of vapor pressure over ice and over 
water at various temperatures below the freezing point. The results of 
these investigations, confirmed by similar independent studies by Juhlin, 
were printed in the third revised edition of these tables. 

Since 1907, especially, several extended series ^ of entirely new deter- 
minations, together covering the whole range of temperature from — 70° C. 
to + 374° C, have been made'at the Physikalische-Technischen Reich- 
sanstalt. Because of the elaborate instrumental means available and the 
extreme effort to eliminate all possible errors these results may be presumed 
to represent the most accurate series of experimental values of this impor- 
tant physical datum available to science. 

Hitherto no satisfactory mathematical equation has been offered ade- 
quate to give computed values of vapor pressures with an order of preci- 
sion comparable to the systematic self consistency of the observations 

* Scheel, Karl und Heuse, Wilhelm. Bestimmung des Sattigungsdrucks von Wasser- 
dampf unter 0°. Annalen der Physik, 1909, 29: 723-737. 

Bestimmung des Sattigungsdrucks von Wasserdampf zwischen 0° und -f 50°. Annalen 
der Physik, 1910, 31: 715-736. 

Holborn, L. und Henning, F. Uber das Platinthermometer und den Sattigungsdruck 
des Wasserdampfes zwischen 50 und 200°. Annalen der Physik, 1908, 26: 833-883. 

Holborn, L. und Baumann, A. Uber den Sattigungsdruck des Wasserdampfes oberhall 
200°. Annalen der Physik, 1910, 31: 945-970. 



Ixil INTRODUCTION. 

themselves. This is particularly the case with the more recent data over 
the whole range of temperature from o° to the critical temperature at about 
374° Centigrade. Two remedies have been utilized to overcome this diffi- 
culty. First, the employment of separate equations of interpolation ad- 
justed to fit the observations accurately over a short range of temperature, 
o° to iOO° for example, as in the case of Broch's computations. (It has al- 
ready been mentioned that theory requires the function for vapor pressures 
over ice to differ from the one for pressures over water, so that the values 
for ice offer no difficulty.) The second remedy sometimes employed con- 
sists in fitting any reasonably accurate equation as closely as possible to 
the observations. The differences between the observed and computed 
values are then charted and a smooth curve drawn by hand through the 
points thus located. This method has been employed notably by Henning^ 
and others, using an empirical equation proposed by Thiesen. 

For the purpose of these tables Marvin has found it possible from 
among a multitude of equations to develop a modification of the theo- 
retical equation of Van der Waals which fits the whole range of observa- 
tions much better than any hitherto offered and with an order of preci- 
sion quite comparable to the data itself. In fact, the equation serves to 
disclose inconsistencies in the observations, more particularly between 50° 
and 80° C, which seem to suggest the need for further experimental de- 
termination of values possibly over the range between 0° and 100°. 

Although it is not difficult to show, as Cederberg - has done, that the 
simple form of general theoretical equation for all vapors developed by 
Van der Waals is inadequate to represent experiments on water vapor with 
sufficient accuracy for practical requirements, nevertheless a somewhat 
simple elaboration of its single constant suffices to remove this limitation 
in a very satisfactory manner. 

The resulting equation is: 

(i) log e - log TT - [A - bX + 77iX^-nX' + sX*] ^-^, where X = '^~^^^ - 

The quantity within the square brackets in this equation replaces a single 
term of the Van der Waals equation which was regarded by him as a con- 
stant. 

In Van der Waals's original equation tt and 6 are respectively the 
critical pressure and temperature (absolute). In the present state of phy- 
sical science, and from the very nature of the data, these quantities cannot 
be evaluated exactly. Moreover it is unnecessary to do so for the mere pur- 
pose of accurately fitting a mathematical curve to the observational data, 

1 Annalen der Physik, 1907, 22: 609-630. 

2 Cederberg, Ivar W. Uber eine exakte Dampfdruckberechnungsmethode. Physik. 
Zeitschr. xv : 697, 1914; Uber die Temperaturabhangigkeit einiger physikalischen Eigen- 
schaften des Wassers in seinen vershiedenen Aggregaczustanden. Physik. Zeitschr. xv: 
824, 1914. 



HYGROMETRICAL TABLES. Ixiii 

because the same result is attained by simply passing the curve through a 
point more accurately known and as near as may be to the critical point. 
This is equivalent to defining tt and by an " equation of condition." 
Another " equation of condition " fixes the pressure at the boiling point which 
by definition must be 760 mm. From the considerations given on page xv 
computations are greatly facilitated by taking all temperatures on the approxi- 
mate absolute scale represented by 7 = 273 X^°. 

A careful preliminary analysis of the observational data in the vicin- 
ity of the critical temperature resulted in assigning values to 6 and tt as 
follows : 

^ = 643°, log. 77=5.1959000 

It is emphasized here again that these data do not represent critical tem- 
perature conditions, but simply a convenient point on the pressure curve 
slightly below the critical temperature, the value of which is fixed with 
considerable accuracy by the observational data. 

The value of the constant A was fixed by the equation of condition, 
^ = 760 mm. when 7^ = 373 (X=— 8). The remaining constants (b, m, n, s) 
are computed by the method of least squares. The results are as follows: 

^ = 3-1473172 

& = . 00295944 
7n=. 0004 1 91 398 

n = .0000001829924 

s— .00000008243516 

The number of significant figures in the constants is obviously greater 
than the accuracy of the data justifies, but is justified to facilitate compu- 
tation and to secure accuracy in the interpolation of values which should 
themselves be as accurate as the data. 

Observations of the pressure of aqueous vapor over ice have not been as 
numerous as those over water. Among the observations which have been 
used in recent times for the development of formulas to express the values 
of vapor pressures over ice there may be mentioned those of K. Scheel and 
W. Heuse ^ at the Physikalisch-Technischen Reichsanstalt at Charlottenburg, 
those of W. Nernst ^ at the Physikalisch-Chemischen Institut of the University 
of Berlin, and those of S. Weber ^ at the Physical Laboratory of the Uni- 

1 Scheel, K., and Heuse, W., op. cit., p. Ixi. 

2 Nernst, W. Verhandlungen der Deutschen Physikalischen Gesellshaft, vol. 11, 
no. 15, p. 313, Aug. 15, 1909. 

Nernst, W. Kinetische Theorie fester Korper ; Vortrage iiber die kinetische Theorie 
der Materie und der Elektrizitat. B. G. Teubner. 

3 Weber, S. Communications from the Physical Laboratory at the University of 
Leiden, no. 150; p. 37, 



Ixiv INTRODUCTION. 

versity of Leiden. M. Thiesen,^ making use of the data of Scheel and Heuse, 
has developed a formula for vapor pressures over ice. This is given by the 
equation, 

(2) logio^ = logio ^0 + 9-632(1-0.000350 y 
where 

^0 = 4-5785 and T=2j2, + t, 
the vapor pressures, e, being in millimeters and temperatures, t, in degrees 
Centigrade. 

For convenience in computing this equation, for metric units it may be 
written 

/g.632 — 0.00^3712 A 

(3) log.o g^ 0.660-2+ ( ^ 273 + / )*• 

For English units the equation becomes 

000 / 9.69 1 93 — 0.00 1 87289 /i\ , 

(4) log.. ..= 1.255888+ { ^ %S3.^ + ,/ V ('.-32) 

^= vapor pressure in millimeters. 
ex = vapor pressure in inches. 
^ = degrees Centigrade. 
ti = degrees Fahrenheit. 

Although the Scheel and Heuse observations extended down to —67^9 C, 
the pressure readings between —60° C. and that temperature were not very 
accurate, being discarded by Thiesen ^ in obtaining the constants in equation 
(2). 

Nernst has made determinations of vapor pressure down to at least —50° C, 
good agreement being found with Scheel and Heuse's measurements. By 
making use of accurate determinations of the heat of vaporization of ice at 
0° C, and attributing the deviations of water vapor from the gas laws to the 
existence of double water molecules - Nernst with the collaboration of H. Levy 
has found for the vapor pressure over ice the formula 

(5) logio e=- ^^"'^ + 1.75 logio r- 0.002 10 r + 6.5343, 

where ^= vapor pressure in mm. of mercury 

and 7=273.09 + ^ 

t = degrees Centigrade. 
This formula has been checked by the accurate determinations of Weber 
the results of whose observations show good agreement with the values 

1 Thiesen, M. Die Dampfspannung iiber Eis. (Mitteilung aus der Physikalisch — 
Technischen Reichsanstalt.) Annalen der Physik, vol. 29, p. 1057, 1909. 
- Weber, S. Loc. cit., pp. 50-52. 
Knudson, M. Annalen der Physik. Vierte Folge, Band 44, p. 536, 1914. 



HYGROMETRICAL TABLES Ixv 

calculated therefrom between the highest temperature at which he made 
observations, —22.75° C., and —96° C. Below the latter temperature the 
agreement does not appear so good. Comparisons between Weber's data and 
the values calculated by means of Thiesen's formula indicate that the latter 
formula most probably gives values which are slightly too high above —40° C, 
and slightly too low below that temperature. 

Nernst ^ has also developed a more complicated formula than (5), making 
use of Pollitzer's quantum-formula for the specific heat of ice. The agree- 
ment with Weber's data in this case is not quite as good on the whole as in 
the case of equation (5), and therefore it is not given here. 

More recently, E. W. Washburn - has developed a formula for the vapor 
pressure over ice, making use of Scheel and Heuse's, and Weber's observa- 
tional data. Tables computed on the basis of this formula have been published 
in the Monthly Weather Review - and in the International Critical Tables.^ 
Formula (5) gives slightly better agreement with the Weber data than does 
the last formula referred to. Further determinations are necessary to settle 
the question as to the most representative equation, especially within the 
range of temperatures between 0°C. and —20° C. Some work has been done 
by Holborn, Scheel, and Henning * to correct the values of Scheel and Heuse 
between 0° C. and — 50° C. 

Table 76 has been computed by means of Thiesen's formula (3), from 
0° C. to —49° 5 C. inclusive, and by means of Nernst's formula (5), from 
— 50° C. to — 70° C. inclusive. 

The vapor pressures in the cables here given are expressed in standard 
manometric units. 

TABLE 74. 

Table 74. Pressure of aqueous vapor over ice. English measures. 

The pressure, computed by equation (4) above, are given to 0.00001 
inch for each degree of temperature from —60° to —15°, for each half 
degree from —15 to ±0°, and for each tenth of a degree from ±o?o to 
+ 32°o. 

TABLE 75. 

Table 75. Pressure of aqueous vapor over water. English measures. 

This table has been computed by converting Table yy into English 
units. The temperature argument is given for every o?i from 32?o to 2.1^° () 
F. The vapor pressures are to 0.0001 inch from 32?o to I30°9 P., and to 
0.001 inch from i3ofo to 214°^ P. 

1 Nernst, W. Verhandlungen der Deutschen Physikalischen Gesellshaft, vol. 12, 
p. 568, 1 910. 

2 Washburn, E. W. Monthly Weather Review, vol. 52, p. 488, 1924. 

3 International Critical Tables, vol. Ill, p. 210, McGraw-Hill Book Company, 1928. 
* Holborn, L., Scheel, K., and Henning, F. " Warmetabellen der Physikalisch- 

Technischen Reichsanatalt," Braunschweig, 1919. 



Ixvi INTRODUCTION 

TABLE 76. 

Table 76. Pressure of aqueous vapor over ice. Metric measures. 

The pressures, given to the nearest o.oooi mm., are computed by Nernst's 
Formula (5), above, for each degree of temperature from —70° to —50° 
inclusive, and by Thiesen's Formula (3), above, for each half degree from 

— 49?5 to —35° inclusive, and each tenth of a degree from — 36^0 to ±ofo. 

TABLE 77. 

Table 77. Pressure of aqueous vapor over water. Metric measures. 

The pressures, computed by equation (i) above, are given for each 
tenth of a degree to o.ooi mm. from o?o to 59°9, and to o.oi mm. from 
50°o to ioo?9. They are given for each degree to o.i mm. from 100° to 
189°, and in millimeters from 190° to 374°. 

TABLE 78. 

Table 78. Pressure of aqueous vapor over ice. Dynamic measures. 

The pressures given in Table 78, in millibars, have been obtained by 
multiplying the pressures given in Table 76, in millimeters, by 1.333224, the 
value of one millimeter in millibars (see page xxii). The values are given for 
each tenth of a degree between —70° C. and 0° C, inclusive. It may be noted 
as in the case of Table 76 that the values between temperatures —50° C. 
and — 70° C. inclusive have been obtained by means of the Nernst Formula 
for the vapor pressure over ice (equation (5), p. Ixiv), whereas the values 
between —50° C. and 0° C. have been obtained by means of the Thiesen 
Formula (equation (3), p. Ixiv). Over the range of temperatures between 

— 50° C. and —36° C, the values for tenths of degrees have been obtained by 
linear interpolation between whole degrees and half degrees. 

TABLE 79. 

Table 79. Pressure of aqueous vapor over water. Dynamic measures. 

Similarly, the vapor pressures in Table 79, in millibars, have been ob- 
tained by multiplying the pressures given in Table yy by 1.333224, and are 
given for each tenth of a degree between 0° C. and 44°9 C, inclusive. 

TABLES 80, 81. 

Table 80. Weight of a cubic foot of saturated aqueous vapor. English mea- 
sures. 
Table 81. Weight of a cubic meter of saturated aqueous vapor. Metric 
measures. 
For many years it has been customary to assume that the specific 
gravity of water vapor relative to dry air is a constant whose theoretical 
value computed from the accurately known densities of its constituent gases 
is 0.6221. Direct experimental determinations of the specific volume of dry 
saturated steam (as yet but few observations are available at moderate 
temperatures) show conclusively (i) that this theoretical specific gravity is 
true only for saturated vapor at very low temperatures or when the vapor 
is in a very attenuated state of partial saturation; (2) that at increasingly 
higher temperatures the specific gravity is increasingly greater than 0.6221. 
These assertions are in accord with the values of w^eight per cubic foot of 



HYGROMETRICAL TABLES. Ixvii 

water vapor tabulated by Marks & Davis ^ from the most recent determina- 
tions of the specific volume of water vapor. However, owing to the paucity 
of data, and its inaccuracy for the range of atmospheric temperatures and 
conditions, the values derived from densities given by Marks and Davis 
between iO° and 50° are probably too low and require revision. The basis on 
which this assertion is made is the generalization that the theoretical value 
0.6221 is probably a minimum specific gravity towards which actual values 
asymptotically tend at low temperature and low relative humidity in the 
meteorological sense, or high super heats in the steam engineering sense. 
This generalization affords a very helpful "control" in harmonizing and 
combining experimental determinations of specific volume. It was thus 
employed in a recomputation, from the original experimental data on speci- 
fic volumes, of the accompanying table of specific gravities, d, of saturated 
water vapor. 

T. (C°) d T. (C°) ,/ 

-60 0.6226 60 0.6273 

50 0.6227 70 0.6283 

40 0.6229 80 0.6296 

30 0.6230 90 0.631 I 

20 0.6232 100 0.6329 

- 10 0.6235 no 0.6351 

± o 0.6238 120 0.6377 

+ 10 0.6241 130 0.6408 

20 0.6246 140 0.6446 

30 0.6251 150 0.6491 

40 0.6257 160 0.6545 

50 0.6264 170 0.6609 

180 0.6687 

The weight of a cubic meter of saturated vapor is given by the expression 

I -\- at 760' 
8 is the weight of a cubic meter of dry air (free from carbonic acid) 
at temperature o°C, and pressure of 760 millimeters of mercury 
of standard density under standard gravity: 8 = 1.2928 kg. 
(Bureau International des Poids et Mesures: Travatix et Memoires, 
t. I, p. A 54.) 
d is the density of aqueous vapor relative to dry air: d — 0.6221. 
While, as stated above, there is reason for believing that this value is too 
low, for atmospheric temperatures the error is less than one per cent. For 
practical work in meteorology and at moderate temperatures, it seems best 
to retain the theoretical value until the actual value has been determined 

1 Marks, Lionel S., and Davis, Harvey N. Tables and diagrams of the thermal properties 
of saturated and superheated steam. New York, 1909. 



Ixviii INTRODUCTION. 

with greater accuracy. For all important calculations except those at low 
temperatures the values of d in the Table on page Ixvii should be employed. 

e is the pressure of saturated aqueous vapor at temperature t, taken 
from Tables 76 and yy. 

a is the coefficient of expansion of air for C? : a = 0.003670. 

/ is the temperature in Centigrade degrees. 

Whence we have 

W (grams) =^ 1.0^821 x 

^^ ^ 1+0.003670^ 

Table 81 is computed from this formula and gives the weight of satu- 
rated vapor in grams in a cubic meter for dew-points from —70° to +40°9 C, 
the intervals from —35° to 40°9 C, being o°i C. The tabular values are 
given to three decimals for temperatures above — 4i°5, and to four decimal 
places for temperatures below —41? 5. 

The weight IVi of a cubic foot of saturated vapor is obtained by convert- 
ing the foregoing constants into English measures. 

The weight of a cubic foot of dry air at temperature 2)~° P- and at a 
pressure of 760 mm. or 29.921 inches is 

? / • N 1292.78 X I S-4.323q , ^ 
S, (grams) = (3.280833)^ "^ ^^-^•^4- 
We have therefore, 

IV, (grams) = X — — ^ =^ II-7459 



29.921 i+ai(^-32°) ■'"'^^ 1+0.002039 (fi- 32°) 

The temperature t, is expressed in degrees Fahrenheit ; the vapor 
pressure e,, expressed in inches, is obtained from Tables 74 and 75. 

Table 80 gives the weight of saturated aqueous vapor in grains per 
cubic foot for dew-points given to every degree from —30° to +20°, to 
each half degree from +20° to +70°, and for every o°2 from 7o°o to 
Ii9?8 F., the values being computed to the thousandth of a grain. 

REDUCTION OF OBSERVATIONS WITH THE PSYCHROMETER AND 
DETERMINATION OF RELATIVE HUMIDITY. 

The psychrometric formula derived by Maxwell, Stefan, August, Reg- 
nault and others is, in its simplest form, 

e = e'-AB(t-t'), 
in which / = Air temperature. 

^' = Temperature of the wet-bulb thermometer. 
e= Pressure of aqueous vapor in the air. 
e'= Vapor pressure, saturated, at temperature /'. 
B = Barometric pressure. 

A — A quantity which, for the same instrument and for certain 
conditions, is a constant, or a function depending in a 
small measure on f'. 



^ The latest adopted value of S = 1.2028 makes this factor 1.05822, and in a few cases, 
especially at high temperatures, increases IV by O.OOI over the values given in Tables 81 
and 80. ^564-95 with 5=1.2928. 3 11. 7461 with 5=1.2928. 



HYGROMETRICAL TABLES. Ixix 

All pressures are expressed in heights of mercurial column under stan- 
dard gravity. 

The important advance made since the time of Regnault consists in 
recognizing that the value of A differs materially according to whether the 
wet-bulb is in quiet or moving air. This was experimentally demonstrated 
by the distinguished Italian physicist, Belli, in 1830, and was well known 
to Espy, who always used a whirled psychrometer. The latter describes 
his practice as follows: "When experimenting to ascertain the dew-point 
by means of the wet-bulb, I always swung both thermometers moderately 
in the air, having first ascertained that a moderate movement produced 
the same depression as a rapid one." 

The principles and methods of these two pioneers in accurate psychrom- 
etry have now come to be adopted in the standard practice of meteorolo- 
gists, and psychrometric tables are adapted to the use of a whirled or ven- 
tilated instrument. 

The factor A depends in theory upon the size and shape of the ther- 
mometer bulb, largeness of stem and velocity of ventilation, and different 
formulae and tables would accordingly be required for different instruments. 
But by using a ventilating velocity of three meters or more per second, the 
differences in the results given by different instruments vanish, and the 
same tables can be adapted to any kind of a thermometer and to all changes 
of velocity above that which gives sensibly the greatest depression of the 
wet-bulb temperature; and with this arrangement there is no necessity to 
measure or estimate the velocity in each case further than to be certain that 
it does not fall below the assigned limit. 

The formula and tables here given for obtaining the vapor pressure 
and dew-point from observations of the whirled or ventilated psychrom- 
eter are those deduced by Prof. Wm. Ferrel (Annual Report Chief 
Signal Officer, 1886, Appendix 24) from a discussion of a large number of 
observations. 

Taking the psychrometric formula in metric units, pressures being 
expressed in millimeters and temperatures in centigrade degrees. Prof. Ferrel 
derived for A the value 

A = 0.000656 (i + 0.0019 O- 

In this expression for A, the factor depending on /' arises from a similar 
term in the expression for the latent heat of water, and the theoretical value 
of the coefficient of /' is o.ooi 15. Since it would require a very small change 
in the method of observ'ing to cause the difference between the theoretical 
value and that obtained from the experiments. Prof. Ferrel adopted the 
theoretical coefficient 0.00115 and then recomputed the observations, ob- 
taining therefrom the final value 

A = 0.000660 {i -i- O.OOI 15 t'). 



Ixx INTRODUCTION. 

With this value the psychrometric formula in metric measures becomes 

e = e' — 0.000660 B {t — t') {\ +0.0011^ t') . 
Expressed in English measures, the formula is 

e= e' — o.oooT^Gy B {t — t') [i +0.00064 (/' — 32°)] 

= ^' -0.000367 B(^-/') (1+ ^ ~^" ) 

\ 1571 / 

in which ^ = Vapor pressure in inches. 

e' = Pressure of saturated aqueous vapor at temperature t'. 

f= Temperature of the air in Fahrenheit degrees. 

^' = Temperature of the wet-bulb thermometer in Fahrenheit degrees 

5= Barometric pressure in inches. 

TABLE 82. 

Table 82. Reduction of PsycJiroiiietric Observations — EuglisJi measures. 

lvalues of f = f' — 0.000367 5 (/ — /') ( i + —j 

This table provides for computing the vapor pressure, e, from obser- 
vations of ventilated wet- and dry-bulb Fahrenheit thermometers. From 
the vapor pressure thus computed the dew-point and relative humidity of 
the atmosphere may be obtained. 

The tabular values of the vapor pressure, e, are computed for degree 
intervals of t' from —20° to +110° F. Below -|-io° the interval for t — t' 
is o?2, and above 10° the interval is 1°. 

Corrections for harouictric pressure. The computation has been made for 
S = 30.o inches, but at the bottom, and usually, also, at the top of each 
page of the table is given a correction, heXAB, computed for B = 2g.o 
inches or A5 = i inch, and for the value of f indicated. The correction is a 
linear function of Ai?. For atmospheric pressures less than 30.0 inches, it 
is to be added to the tabular values of e, while for atmospheric pressures 
greater than 30.0 inches it is to be subtracted. 

The values of e are given to o.oooi inch for t' less than 10°, and to o.ooi 
inch for t' greater than 10°. 

Examples: 

1. Given, f = 84°3; t'^GG^y, and 5 = 30.00 inches. With r = 66?7 
and t — t'=iy°6 as arguments. Table 82 gives for e the value 
0.462 inch. On page 182, for ^ — /' = o°o it is seen that a vapor pres- 
ure of 0.462 inch corresponds to a temperature t' = t = S7° , which 
is the saturation, or dew-point temperature for the data given. 

2. Given. / = 34°5; /' = 29?4; 5 = 22.3 inches. With t' = 2g°^ and 
/ — ^' = 5°: as arguments. Table 82 gives for e the value 0.104. 

A5 = 30.0 — 22.3 = 7.7, and At? XA5 = o.ooi8x 7.7 = 0.014. 

Correct value of c =0.ri8inch 



HYGROMETRICAL TABLES. Ixxi 

For ^ — ^' = o?o a vapor pressure of 0.118 inch corresponds to a tem- 
perature ^' = ^ = 23° (see page 182), which is the saturation or dew- 
point temperature for the data given. 

Table 83. Relative humidity — Temperature Fahrenheit. 

The table gives the vapor pressure corresponding to air temperatures 
from —30° to -|-I20° at degree intervals (side argument) and for percen- 
tages of saturation at 10 per cent intervals (top argument). It is computed 
from the formula 

e = esX relative humidity, 

where Cs is the saturation vapor pressure at the given air temperature. Below 
a temperature of 20° the values of e are given to o.oooi inch ; above 20° 
they are given to 0.00 1 inch. 

Examples: 

1. In dew-point example i, above, the computed vapor pressure is 
0.462 inch. Entering Table 83 with air temperature 84?3 as side 
argument, we obtain vapor pressure 

0.356 inch = relative humidity 30 

and 

90 

0.462 inch — 0.356 inch = o.io6 inch= " " 7^ ~ 9 

therefore, vapor pressure — 

0.462 inch with t = 84°s F. = " " 39 

2. In dew-point example 2, above, the computed vapor pressure is 
0.1 18 inch. Entering Table 83 with air temperature 34°5 as side 
argument, we obtain, vapor pressure 

0.1 00 inch = relative humidity 50 

and 

00 

0.1 18 inch — 0.1 00 inch = 0.018 inch = " " — =9 

therefore, vapior pressure — 

0.1 18 inch with ^ = 34?5 F. = " " 59 

Table 84. Reduction of Psychrometric Observations — Metric measures. 

Values of e = e' — 0.000660 B{t — t'){i-\- o.ooiis t') 

This table provides for computing the vapor pressure from observations 
of ventilated wet- and dry-bulb Centigrade thermometers. From the vapor 
pressure thus computed the dew-point and relative humidity of the at- 
mosphere may be obtained. 

The tabular values of the vapor pressure, e, are computed for degree 
intervals of t' from —30° to +45° C. Below — 5°o the interval for t — t' 
is o?i, and above — 5°0 the interval is 1°, 



Ixxii INTRODUCTION. 

Corrections for barometric pressure. The computation has been made 
for B = /6o mm. but on each page of the table is given a correction, 
AeXi^B, computed for B=66o, or AP=ioo mm., and for the vakies of 
t' indicated. The correction is a hnear function of a5. For atmospheric 
pressures less than 760 mm. it is to be added to the tabular values of c, 
while for atmospheric pressures greater than 760 mm. it is to be subtracted. 
The values of e are given to o.ooi mm. for t' less than — 5°o, and to o.oi 
mm. for /' greater than — 5°o. 

Example : 

Given, t=io°4 C; /' = 8°3 C. and ^ = 740 mm. With t' = S°7, and 
t — t' = 2°i as arguments, Table 84 gives for e the value 7.15 mm. 



AB=- ^^=0.2. AeXAB = 0.14x0.2 



= 0.0^. 
100 ■ ^ 

Corrected value of c =7.18 mm. 

For t — t'=:0 a vapor pressure of 7.18 mm. corresponds to a tempera- 
ture t' = t = 6°2, C., which is the saturation, or dew-point tempera- 
ture for the data given. 

TABLE 85. 

Table 85. Relative humidity — Temperature Centigrade. 

This table gives the vapor pressure corresponding to air temperatures 
from —45° C. to 4-55° C. at degree intervals (side argument) and for per- 
centage of saturation at 10 per cent intervals (top argument). It is com- 
puted from the same formula as Table 83, namely, 

e = esX relative humidity. 

Below a temperature of -|-5?0 the values of e are given to o.oi mm.; 
above 5°o they are given to o.i mm. 

Example: 

In the dew-point example given above, the computed vapor pressure 
is 7.18 mm. Entering Table 85 with air temperature 10.4 as side ar- 
gument, we obtain vapor pressure 

6.6 mm. = relative humidity 70 

and 

7.18-6.6 = 0.58 mm. = " " — = 6 

^ -J 10 

therefore, vapor pressure 

7.18 mm. with ^=10.4 C.= " " = 76 

TABLE 86. 

Table 86. Rate of decrease of vapor pressure zvith altitude for mountain 
stations. 
From hygrometric observations made at various mountain stations on 
the Himalayas, Mount Ararat, Teneriffe, and the Alps, Dr. J. Hann 
(Lehrbuch der Meteorologie Dritte Aiifiage, S. 230) has deduced the fol- 
lowing empirical formula showing the average relation between the vapor 



REDUCTION OF SNOWFALL MEASUREMENTS. Ixxiii 

pressure e^ at a lower station and e the vapor pressure at another station 

at an altitude h meters above it: 

h_ 

-1 = lO 6300 

This is of course an average relation for all times and places from which 
the actual rate of decrease of vapor pressure in any individual case may 
widely dilTer. 

6 

Table 86 gives the values of the ratio — for values of h from 200 to 
6000 meters. An additional column gives the equivalent values of h in feet. 

REDUCTION OF SNOWFALL MEASUREMENT. 

The determination of the water equivalent of snowfall has usually been 
made by one of two methods: {a) by dividing the depth of snow by an ar- 
bitrary factor ranging from 8 to 16 for snow of different degrees of com- 
pactness; (6) by melting the snow and measuring the depth of the resulting 
water. The first of these methods has always been recognized as incapable 
of giving reliable results, and the second, although much more accurate, 
is still open to objection. After extended experience in the trial of both these 
methods, it has been found that the most accurate and most convenient 
measurement is that of weighing the collected snow, and then converting 
the weight into depth in inches. The method is equally applicable whether 
the snow as it falls is caught in the gage, or a section of the fallen snow is 
taken by collecting it in an inverted gage. 

Table 87. Depth of water corresponding to the weight of a cylindrical snow 
core, 2.655 inches in diameter. 

This table is prepared for convenience in making surveys of the snow 
layer on the ground, particularly in the western mountain sections of the 
country. The weighing method is the only one found to be practicable. 
Present Weather Bureau practice is to take out a sample by means of a 
special tube, whose diameter, 2.655 inches, has been selected by reason of 
convenience in manipulation and simplicity in relation to the pound. 
Table 87 gives the depth of water in inches and hundredths corresponding 
to given weights. The argument is given in hundredths of a pound from 
O.oi pound to 2.99 pounds. 

Table 88. Depth of water corresponding to the weight of snow {or rain) col- 
lected in an 8 -inch gage. 

The table gives the depth to hundredths of an inch, corresponding to 
the weight of snow or rain collected in a gage having a circular collecting 
mouth 8 inches in diameter — this being the standard size of gage used 
throughout the United States. 



Ixxiv INTRODUCTION. 

The argument is given in hundredths of a pound from O.oi pound to 
0.99 pound. When the weight of the collected snow or rain is one pound or 
more, the depth corresponding to even pounds may be obtained from the 
equivalent of one pound given in the heading of the table. 

Example : 

The weight of the snow collected in a gage having a circular collecting 
mouth 8 inches in diameter is 3.48 pounds. Find the correspond- 
ing depth of water. 
A v/eight of 3 lbs. corresponds to a depth of water of 

0-5507 X 3. equals 1.65 in. 

A weight of 0.48 \hs. corresponds to a depth of water of 0.26 

A " '" 3.48 " " " " " T^i in 

Table 89. Quantity of rainjall corresponding to given depths. table 89. 

This table gives for different depths of rainfall in inches over an acre 
the total quantity of water expressed in cubic inches, cubic feet, gallons, 
and tons. (See Henry, A. J. "Quantity of Rainfall corresponding to Given 
Depths." Monthly Weather Review, 1898, 26: 408-09.) 

GEODETICAL TABLES. 

Table 90. Value of apparent gravity on the earth at sea level.'^ table 90. 

The value of apparent gravity on the earth at sea level is given for 
every twenty minutes of latitude from 5° to 86°, and for degree intervals 
near the equator and the poles. It is computed to 0.001 dyne from the equa- 
tion ^ 

g<i, = 978-039 (i + 0.005294 sin- 4> — 0.000007 sin^ 2 4>) 

= 980.621 (l — 0.002640 cos 2 ^ + 0.000007 cos- 2 </)) 

in which g^ is the value of the gravity at latitude <^. 

The second form of the equation is the more convenient for the com- 
putation. 

TABLE 91. 

Table 91. Relative acceleration of gravity at sea level at different latitudes. 

The formula adopted for the variation with latitude of apparent gravity 
at sea level is that of the U.S. Coast and Geodetic Survey, given above. 

gi) 

The table gives the values of the ratio — _ to six decimals for every 10' 

of latitude from the equator to the pole. 

^ Gravity is here considered in terms of force (expressed in dynes) that is exerted on 
a mass of one gram rather than its numerical equivalent, acceleration (expressed in cen- 
timeters and seconds), for which there is no convenient expression. 

2 See Bowie, William, Investigations oj Gravity and Isostasy. U.S. Coast and Geodetic 
Survey, Special Publication No. 40, 191 7, page 13^. 



GEODETICAL TABLES. IxXV 

LENGTH OF A DEGREE OF THE MERIDIAN AND OF ANY PARALLEL. 

The dimensions of the earth used in computing lengths of the meridian 
and of parallels of latitude are those of Clarke's spheroid of 1866.1 fhis 
spheroid undoubtedly represents very closely the true size and shape of the 
earth, and is the one to which nearly all geodetic work in the United States 
is now referred. 

The values of the constants are as follows: 

a, semi-major axis == 20926062 feet; log a = 7.3206875. 

b, semi-minor axis = 20855121 feet; log b = 7.3192127. 

e"^ = 5 — = 0.00676866 ; log r-= 7.8305030 — 10. 

With these values for the figure of the earth, the formula for comput- 
ing any portion of a quadrant of the meridian is 

Meridional distance in feet = [5.5618284] A4> (in degrees), 

— [5.0269880] cos 2 </> sin Ac/), 
+ [2.0528] cos 4 </) sin 2 A^, 
in which 2</) = 02 + (/)i, A0 = {/)2 — </)i; </>i, 02 =end latitudes of arc. 

For the length of i degree, the formula becomes: 

I degree of the meridian, in feet = 364609.9 — 1857. i cos 2 +3-94 cos 4 0. 
The length of the parallel is given by the equation 

I degree of the parallel at latitude 0, in feet = 

365538.48 cos - 310.17 cos 3 + 0.39 cos 5 0. 

Table 92. Length of one degree of the meridian at different latitudes. 

This gives for every degree of latitude the length of one degree of the 
meridian in statute miles to three decimals, in meters to one decimal, and 
in geographic miles to three decimals — the geographic mile being here de- 
fined to be one minute of arc on the equator. The values in meters are com- 
puted from the relation: i meter = 39.3700 inches. The tabular values rep- 
resent the length of an arc of one degree, the middle of which is situated 
at the corresponding latitude. For example, the length of an arc of one 
degree of the meridian, whose end latitudes are 29° 30' and 30° 30', is 
68.879 statute miles. 

Table 93. Length of one degree of the parallel at different latitudes. 
This table is similar to Table 92. 

^ Comparisons of Standards of Length, made at the Ordnance Survey Office, South- 
ampton, England, by Capt. A. R. Clarke, R. E., 1866. 



Ixxvi INTRODUCTION. 

TABLE 94. 

Table 94. Duration of sunshine at different latitudes for different values of 
the sun's declination. 

Let Z be the zenith, and NH the hori- 
zon of a place in the northern hemi- 
sphere. 
P the pole; 

QEQ' the celestial equator; 
RR' the parallel described by the sun on 

any given day; 
5" the position of the sun when its upper 

limb appears on the horizon; 
PN the latitude of the place, 0. 
ST the sun's declination, 5. 
PS the sun's polar distance, 90° — 8. 
ZS the sun's zenith distance, z. 
ZPS the hour angle of the sun from meridian, /. 

r the mean horizontal refraction = 34' approximately. 
5 the mean solar semi-diameter = 16' " 

s = 90° + r + s = 90° 50' 
In the spherical traingle ZPS, the hour angle ZPS may be computed 
from the values of the three known sides by the formula 




sin * ZPS 



\/^ 



(ZS + PZ - PS) sin i {ZS + PS- PZ) 



sin PZ sin PS 



or 



sin ^ / = 



sm 



+ 5 - 0) sin Hs - 5 +<A) 



cos COS b 



The hour angle /, converted into mean solar time and multiplied by 2 
is the duration of sunshine. 

Table 94 has been computed for this volume by Prof. Wm. Libbey, Jr. 
It is a table of double entry with arguments 5 and 0. For north latitudes 
northerly declination is considered positive and southerly declination as 
negative. The table may be used for south latitudes by considering south- 
erly declination as positive and northerly declination as negative. 

The top argument is the latitude, given for every 5° from 0° to 40°, for 
every 2° from 40° to 60°, and for every degree from 60° to 80°. 

The side argument is the sun's declination for every 20' from 5' 23° 27' 
to N 23° 27'. 

The duration of sunshine is given in hours and minutes. 

To find the duration of sunshine for a given day at a place whose lati- 
tude is known, find the declination of the sun at mean noon for that day 
in the Nautical Almanac, and enter the table with the latitude and declina- 
tion as arguments. 



GEODETICAL TABLES. Ixxvii 

Example : 

To find the duration of sunshine, May i8, 1892, in latitude 49° 30' 

North. 
From the Nautical Almanac, 8=19° 43' A^.^ at Greenwich apparent noon. 
From the table, with 8=19° 43' N. and ^ = 49° 30', the duration of 
sunshine is found to be 15'' 31'". 
Table 95. Declination of the sun for tlie year 1899, at Greemvich apparent 
noon. 
This table is an auxiliary to Table 94, and gives the declination of the 
sun for every third day of the year 1899. These declinations may be used 
as approximate values for the corresponding dates of other years when the 
exact declination cannot readily be obtained. Thus, in the preceding ex- 
ample, the declination for May 18. 1892, may be taken as approximately 
the same as that for the same date in 1899, viz. 19° 34', 

THE DURATION OF TWILIGHT. 

A review of the literature ^ indicates that from an early date astronomi- 
cal twilight has been considered to end in the evening and begin in the morn- 
ing when the true position of the sun's center is 18° below the horizon. At 
this time stars of the sixth magnitude are visible near the zenith, and gen- 
erally there is no trace on the horizon of the twilight glow. 

It also appears that civil twilight ends in the evening and begins in the 
morning when the true position of the sun's center is 6° below the horizon. 
At this time stars and planets of the first magnitude are just visible. In the 
evening the first purple light has just disappeared, and darkness compels 
the suspension of outdoor work unless artificial lighting is provided. In 
the morning the first purple light is beginning to be visible, and the illu- 
mination is sufficient for the resumption of outdoor occupations. 

Some confusion has arisen in the computation of tables of the duration 
of both astronomical and civil twilight, due to the fact that in some in- 
stances the time of sunrise or sunset has been considered to be that instant 
when the center of the sun is on the true horizon; in others, when its center 
appears to be on the true horizon ; and in still others when the upper limb 
of the sun appears to coincide with the true horizon. In the United States 
this latter is regarded as defining the time of sunrise and sunset. 

In the tables here presented the duration of astronomical twilight is 
the interval between sunrise or sunset, according to this latter definition, 
and the instant the true position of the sun's center is 18° below the horizon. 
Likewise, the duration of civil twilight is the interval from sunrise or sun- 
set to the instant the true position of the sun's center is 6° below the hori- 
zon. 

^ Kimball, Herbert H. " Duration and Intensity of Twilight," Monthly Weather Review 
1916, 44: 614-620. 



Ixxviii INTRODUCTION. 

The computations may be made from the equation 

sin a — sin </> sin 5 

cos t = 7 ■ 

cos (j) cos 5 

where t is the sun's hour angle from the meridian, a is the sun's altitude, 
considered minus below the horizon, 5 is the solar declination, and (p is the 
latitude of the place of observation. 

The solar declinations employed are those given in the American 
Ephemeris and Nautical Almanac, 1899, pp. 377-384, Solar Ephemeris for 
Washington. 

The atmospheric refraction with the sun on the horizon has been as- 
sumed to be 34', and 16' has been allowed for the sun's semi-diameter, so 
that at the instant of sunrise or sunset, as defined above, the true position 
of the sun's center is about 50' below the horizon. The difference between 
this value of / and its value with the sun 6° and 18° below the horizon gives, 
respectively, the duration of civil and astronomical twilight. 

The computations have been simplified by the use of Ball's Altitude 
Tables,^ from which the value of / has been determined for true altitudes 
of the sun of — 50', — 6°, and — 18°. 

Table 96. Duration of astronomical tiviUght. table 96. 

The duration of astronomical twilight is given to the nearest minute 
for the 1st, nth, and 21st day of each month for north latitudes, 0°, 10°, 
20°, 25°, and at 2° intervals from 30° to 50°, inclusive. The absence of data 
for latitude 50° from June i to July ii, inclusive, indicates that between 
these dates at this latitude astronomical twilight continues throughout the 
night. 

Table 97. Duration of civil tivilight. table 97. 

The duration of civil twilight is given to the nearest minute for the 
1st, nth and 21st day of each month for north latitudes 0°, 10°, 20°, 25°, 
and at 2° intervals from 30° to 50°, inclusive. 

RELATIVE INTENSITY OF SOLAR RADIATION AT DIFFERENT 

LATITUDES. TABLE 98. 

Table 98. Mean intensity for 24 hours of solur radiation on a horizontal 
surface at the top of the atmosphere. 

This table is that of Prof. VVm. Ferrel, published in the Annual Report 
of the Chief Signal Officer, 1885, Part 2, p. 427, and computed from formula; 
and constants given in Chapter II of the above publi-^ation, pages 75 to 82. 
It gives the mean intensity, J, for 24 hours of solir radiation received by a 
horizontal surface at the top of the atmosphere, in terms of the mean solar 

1 Ball, Frederick. Altitude Tables for lat. ji° to 60°. London, 1907; [same] tor lat. 0° to 
30°, London, 1910. 



GEODETICAL TABLES. Ixxix 

constant Aq, for each tenth parallel of latitude of the northern hemisphere, 
and for the first and sixteenth day of each month; also the values of the 
solar constant A in terms of A^, and the longitude of the sun for the given 
dates. 

Table 99. Relative amounts of solar radiation received on a horizontal surface 
during the year at different latitudes. 

The second column of this table is obtained from the last line of 
Table 98 by multiplying by 1440, the number of minutes in 24 hours. It 
therefore gives the average daily amount of radiation that would be re- 
ceived from the sun on a horizontal surface at the surface of the earth if 
none were absorbed or scattered by the atmosphere, expressed in terms of 
the mean solar constant. The following columns give similar data, except 
that the atmospheric transmission coefficient is assumed to be 0.9, 0.8, 0.7 
and 0.6, respectively, and have been computed by utilizing Angot's work 
{Recherches theorctiques sur la distribution de la chaleur a la surface du globe, 
par M. Alfred Angot, Annales du Bureau Central Meteorologique de France, 
Annee 1883. v. i. B 121-B 169), which leads to practically the same values 
as Ferrel's when expressed in the same units. 

The vertical argument of the table is for lo*^ intervals of latitude from 
the equator to the north pole, inclusive. 

Table 100. Air mass, m, corresponding to different 'zenith distances of the sun. 

For homogenous rays, the intensity of solar energy after passing through 
an air mass, m, is expressed by the equation I = Iq a*", where I^ is the in- 
tensity before absorption, a is the atmospheric transmission coefficient, or 
the proportion of the energy transmitted by unit air mass, and m is the air 
mass passed through. If we take for unit air mass the atmospheric mass 
passed through by the rays when the sun is in the zenith, then for zenith 
distances of the sun less than 80° the air mass is nearly proportional to the 
secant of the sun's zenith distance. In general, the secant gives air masses 
that are too high by an increasing amount as the zenith distance of the sun 
increases. 

The equation by which air masses are sometimes computed is 

atmospheric refraction 



m 



K sin Z 



where Z is the sun's zenith distance and i^ is a constant. The uncertain 
factor in this equation is the atmospheric refraction. Table 100 gives values 
of m computed by Bemporad {Rend. Ace. Lincei., Roma, Ser. 5, V. 16, 2 
Sem. 1907, pp. 66-71) from the above formula, using ior K the value 58'.'36. 
The argument is for each degree of Z from 20° to 89°, with values of m 
added for Z = 0°, 10°, and 15°. The values of m are given to two decimal 
places. 



IxXX INTRODUCTION. 

Table 101. Relative illuminatioii intensities. table 101. 

The table gives illumination intensities in foot-candles for zenithal sun, sky 
at sunset, sky at end of civil twilight, zenithal full moon, quarter moon, and 
starlight, and the ratio of these intensities to the illumination ,f rom the zenithal 
full moon. For the sources of the data see Kimball, Herbert H., " Duration 
and Intensity of Twilight," Monthly Weather Review, 1916, 44: 614-620. 

MISCELLANEOUS TABLES. 

WEIGHT IN GRAMS OF A CUBIC CENTIMETER OF AIR. 

The following tables (102 to 107) give the factors for computing the 
weight of a cubic centimeter of air at different temperatures, humidities 
and pressures. 

o.ooi 2930 ( B — 0.378 e \ 
)7 1 V 760 / 



8 = 



I + 0.00367 t \ /( 
in which 8 is the weight of a cubic centimeter of air expressed in grams, 
under the standard value of gravity ((7 = 980.665) 
B is the atmospheric pressure in millimeters, under standard grav- 
ity ; 
e is the pressure of aqueous vapor in millimeters, under standard 

gravity ; 
t is the temperature in Centigrade degrees. 
For dry atmospheric air (containing 0.0004 of its weight of carbonic 
acid) at a pressure of 760 mm. and temperature 0° C, the absolute density, 
or the weight of one cubic centimeter, is 0.0012930 gram. See p. xlvi. 
The weight of a cubic centimeter may also be written as follows : 

g_ 0.0012930 / 7^-0.378 g \ 

I -1-0.002039(^ — 32°) \ 29.921 / 
where 8 is defined as before, but B and e are expressed in inches and / in 
Fahrenheit degrees. Thus by the use of tables based on these two formulae, 
lines of equal atmospheric density may be drawn for the whole world, no 
matter whether the original observations are in English or metric measures. 

ENGLISH MEASURES. TABLES 102, 103, 104. 

Table 1 02. Temperature Term. 

This table gives the values and logarithms of the expression 
_ 0.0012930 

^ 29.921 J ^ 0.002039 {t-T,2°) 

for values of t extending from —45° F. to -1-140° F., the intervals between 
0° F. and 110° F. being 1°. 

The tabular values are given to five significant figures. 



MISCELLANEOUS TABLES. Ixxxi 

Table 1 03. Term for humidity; auxiliary to Table 102. 

,,.,., h B — o.^ySe 

Table 104. Humidity and pressure term. = 

^ ^ 29.921 29.921 

Table 1 OSgives values of 0.378 e to three decimal places as an aid to the 
use of Table 104. The argument is the dew-point given for every degree 
from —60° F. to + 140° F. The second column gives the corresponding values 
of the vapor pressure {e) derived from Tables 74 and 75. 

, , , . , r h 5 — 0.378 e , , 

Table 1 04 gives values and logarithms of = ^^ for values 

29.921 29.921 

of // extending from lo.o to 31.7 inches. The logarithms are given to five 
significant figures and the corresponding numbers to four decimals. 

Example : 

The air temperature is 68° F., the pressure is 29.36 inches and the dew- 
point 51° F. Find the logarithm of the density. 
Table 102, for / = 68° F., gives 7.08085-10 

Table 103, for dew-point 51°, gives 0.378 ^ = 0.142 inch, 
Table 104, for /! = 5 — 0.378 ^ = 29.36 — 0.14 = 29.22, gives 9.98941 — 10 

30 



Logarithm of density= 7.07056— 10 

METRIC MEASURES. 

Table 105. Temperature term. 

This table gives values and logarithms of the expression 

_ 0.0012930 
^''^'""1+0.00367^ 
for values of / extending from — 34°C. to -1-69° C. The tabular values are 
given to five significant figures. 
Table 106. Term for humidity; auxiliary to Table 107. 

^ ^ . , . , h B — o. 378 e 

Table 107- Humidity and pressure terms. — -r- = 7 

760 760 

Table 106 gives the values of 0.378 e to hundredths of a millimeter for 
dew-points extending from —50° C. to +60° C. Above —25° C. the interval 
is one degree. The values of the vapor pressure, e, corresponding to these 
dew-points, given in the second column,* are taken from tables 76 and yj. 

Table 107 gives values and logarithms of --:— = -^ • for 

^ ^ ^ 760 760 

values of h extending from 300 to 799 mm. The atmospheric pressure B is 
the barometer reading corrected for gravity and 0.378 e is the term for 
humidity obtained from Table 106. The logarithms are given to five signif- 
icant figures and the corresponding numbers to four decimal places. 

6 



Ixxxii INTRODUCTION. 

TABLE 108. 

Table 1 08. Atmospheric water-vapor lines in the visible spectrum. 

Table io8, prepared by the Astrophysical Observatory at Washington, 
gives a summary of Hnes in St. John's (1928) revision of Rowland's " Pre- 
liminary Table of Solar Spectrum Wave Lengths," recorded as of atmospheric 
water vapor origin. There are more than 400 such lines in Rowland's table, 
but an abridgment is here made as follows : 

Only lines of intensity " i " or greater are here separately given, but the 
total number and average intensity of the fainter lines lying between these 
are inserted. The scale of intensities is such that a line of intensity " i " is 
" just clearly visible " on Rowland's map ; the H and K lines are of intensity, 
1,000; Z)i (the sodium line of greater wave length), 20; C, 40. "Lines 
more and more difficult to see " are distinguished by o, — i, —2, and —3. 

TABLE 109. 

Table 1 09. Atmospheric ivater-vapor bands in the infra-red spectrum. 

The values of Table 109 relate to the transmission of energy in the minima 
of various water-vapor bands, when there is i cm. of precipitable water in 
the path through the air. For other amounts of water-vapor, the depths of 
these minima may be taken as equal to a^, where a is the coefficient taken 
from the third column of Table 109 and 8 is the amount of precipitable 
water in cm. in the path. For average conditions in the transmission of radia- 
tion through the atmosphere, 8 may be determined by the modification of 
Hann's formula 8 = 2.0(? sec. Z, where e is the vapor pressure in cms. as 
determined by wet and dry thermometers and Z is the angle which the 
path makes with the vertical. 

For the use of the transmissions observed in such bands for the inverse 
process of determining the amount of water-vapor in the atmosphere, see 
Fowle, Astrophysical Journal, 35, p. 149, 1912; 37, p. 359, 1913. 

TABLE 1 10. 

Table 110. Transmission percentages of radiation through moist air. 

The values of Table no will be of use when the transmission of energy 
through the atmosphere containing a known amount of water-vapor is 
under consideration. An approximate value for the energy transmitted 
may be had if the amount of energy from the source between the wave- 
lengths of the first column is known and is multiplied by the corresponding 
transmission coefficients of the subsequent columns of the table. The table 
is compiled from Fowle, " Water-vapor Transparency," Smithsonian Mis- 
cellaneous Collections, 68, No. 8, 1917 ; see also, Fowle, " The Transparency 
of Aqueous Vapor," Astrophysical Journal, 42, p. 394, 191 5. 

TABLE 111. 

Table 111. The spectral distribution of solar radiation and its transmission 
by the atmosphere. 
The measured relative intensity of radiation at a given wave length 
depends not only upon the source, but also upon the prismatic dispersion. 



MISCELLANEOUS TABLES. Ixxxiii 

Usually, a dispersion coefficient is used to reduce the intensities to what they 
would have been had the dispersion been the same at all wave lengths, but 
in Table iii it is that of the ultra-violet glass prism employed by the Astro- 
physical Observatory of the Smithsonian Institution in making Solar radia- 
tion measurements. Column i gives the deviation from w^ in minutes of arc 
at which the energy was measured. Column 2 gives the corresponding wave 
length. Column 3 gives transmission coefficients, aax, for pure dry air at 
760 mm. pressure, with the sun in the zenith. They have been computed by 
means of Rayleigh's equation as modified by King.^ Fowle's ^ values of a^^X' 
the transmission coefficient for that amount of atmospheric water vapor 
which if precipitated would produce a layer of water one centimeter thick, 
have been employed to compute the transmission of solar radiation through 
moist air. Column 5 gives what Abbot ^ considers the most reliable value for 
the relative energy outside the atmosphere, ^ox, at the wave lengths corre- 
sponding to the deviations of Column I. 

The data in the upper part of Columns 6, 7, and 8 have been computed by 
means of the factors shown in their respective headings. They give the energy 
distribution with the sun in the zenith and atmospheric pressure of 760 mm., 
column 6 with no moisture present, and columns 7 and 8 with sufficient mois- 
ture to produce a layer of water i.o cm. and 2.0 cm. thick, respectively, if 
precipitated. 

Fowle * has shown that for average conditions the precipitable water in the 
atmosphere above a given place may be approximately determined from the 

—h 

equation iv = 2.;^c 10 22000 , where e is the surface water vapor pressure in 
centimeters and h is the altitude of the place above sea level, in meters. The 
Aerological Division of the U. S. Weather Bureau is developing equations 
that more accurately express the relation between surface vapor pressure 
and the water-vapor content of the atmosphere, utilizing for this purpose its 
valuable accumulation of free-air data. It's results, which are approaching 
completion, will probably be published in the Monthly Weather Review during 
the current year. 

Similarly, the data in the upper part of columns 9 and 10 have been 
computed for the sun at zenith distances 60 and 70.7 degrees, and the moisture 
content of the atmosphere equivalent to i.o cm., and 3.0 cm., of precipitable 
water, respectively. 

1 King, Louis Vessot. On the scattering and the absorption of light in gaseous media 
with applications to the intensity of sky radiation. Phil. Trans. Roy. Soc, London, A. 212, 

p. 375, 1919. 

- Fowle, F. E. Water vapor transparency to low-temperature radiation. Smithsonian 
Misc. Coll., vol. 68, no. 8, 1917. 

3 Abbot, C. G., and others. The distribution of energy in the spectrum of the sun 
and stars. Smithsonian Misc. Coll., vol. 74, no. 7, 1923. 

* Fowle, F. E. Atmospheric transparency for radiation. Monthly Weather Review, 
vol. 42, pp. 2-4, 1 914. 



Ixxxiv 



INTRODUCTION. 



These computations take account of the depletions of solar radiation by 
scattering only. We now proceed to compute the energy in the total solar 
spectrum after passing through dust-free air containing the amounts of at- 
mospheric moisture specified, and with the sun at the distances from the 
zenith indicated. 

The wave lengths given in column 2 do not cover the entire range of 
wave lengths included in the solar spectrum. It is therefore necessary to 
apply a correction to the measured energy so as to include the energy not 



Air Mass. m. (Pressure -760 cm) 
1.0 20^ 



30 



40 




measured. Abbot's ^ method of determining these corrections has been 
followed in computing the corrections for u. v. (ultra-violet) and i. r. (infra- 
red) energy not measured, which are given in the lower part of Table iii. 
The absorption by water vapor in the great water vapor bands in the infra- 
red (w. V. absorption) had been computed by the method developed by Fowle.- 
Finally, Fowle has computed for this table the absorption by the permanent 
gases of the atmosphere. 

The relative energy in different parts of the solar spectrum may now be 
determined by summing up the energies at different wave lengths, giving 

1 Abbot, C. G. Smithsonian Solar Researches. Gerland's Beitrage zur Geophysik, 
Bd. XVI, Heft 4, pp. 344-353, 1927. 

- Fowle, F. E. Water vapor transparency to low-temperature radiation. Smithsonian 
Misc. Coll., vol. 68, no. 8, 1917. 



MISCELLANEOUS TABLES. IxXXV 

double weight to those lo' in deviation apart. It will be noted that the summa- 
tion includes the following spectral bands, namely, below 0.346/^, between 0.346 
and o.405fi, between 0.405 and 0.704/x, and above 0.704/i, ; or the short-wave 
ultra violet, the long-wave ultra violet, the visible radiation, and the infra-red 
radiation. The percentage of the energy included in each of these sections 
to the total energy is given, and the percentage of the total to the total before 
it enters the atmosphere, or the atmospheric transmission corresponding to 
the conditions as specified, is also given. 

By means of computations such as are given in Table iii the curves of 
Figure i, showing the depletion by scattering in passing through dry air, 
curve I, and through air containing different amounts of moisture, curves 2 
to 8, and the depletion by both scattering and absorption, curves 9-15, have 
been constructed. The ordinates give atmospheric transmission ; the abscissas, 
air masses, m, corresponding to zenith distances of the sun 0°, 60°, 70.7°, 
and 75.7°. The values for m less than i represent depletions at elevations 
above sea level. 

For a more complete description of this figure see the Monthly Weather 
Review, 55 : 167, 1927, and 56: 394, 1928, and 58: 43, 1930. 

Abbot's correction for u. v. radiation below 0.346/^, which is not mea- 
sured, includes the radiation absorbed at these wave lengths by an average 
amount of atmospheric ozone, but does not take account of variations in the 
ozone content of the atmosphere. Fowle ^ has shown that the absorption by 
ozone in the visible spectrum varies in amount with both time and place, and 
that it causes a depletion of solar radiation by about 0.2 to 0.4 per cent of the 
solar constant. This depletion has not been included in "Absorption by perma- 
nent gases," near the bottom of Table 112. The values of atmospheric trans- 
mission in the last line of the table are therefore too high by from 0.2 to 0.4 
per cent, more or less, depending upon the ozone absorption in the visible 
spectrum, and disregarding the possible error, probably small in amount, due 
to variations in the ozone absorption in the ultra-violet. 

Example of the use of Figure i. The atmospheric pressure is 76.0 cm., 
the water vapor pressure 0.87 cm., the zenith distance of the sun is 60° 
(ni = 2.0), and the elevation of the station is only slightly above sea level. The 



precipitable water = 2.3X0.87X 10 ^^''"o =2.0 cm. From Figure i the trans- 
mission read from curve 11, for m = 2, is 0.653. 

T , ,-7 , • , , , TABLE 1 12. 

Table 11 2. International meteorological symbols. 

The information under this heading has been compiled for the present 
edition by the librarian of the United States Weather Bureau, and repre- 
sents current practice in the use of the symbols approved by the Interna- 
tional Meteorological Organization. For further information on the sub- 



1 Fowle, F. E. Atmospheric ozone : Its relation to some solar and terrestrial phe- 
nomena. Smithsonian Misc. Coll., vol. 81, No. Ii, 1929. 



Ixxxvi INTRODUCTION. 

ject of meteorological symbols, see Monthly Wcatlier Reviczv (Wash., D. C), 

May, 1 91 6, pp. 265-274. 

Table 113. Internationa! Cloud Classification. 

In the " International Atlas of Clouds and of State of the Sky, Abridged 
edition for the use of Observers, Paris, 1930," the Commission of the Inter- 
national Meteorological Committee for the Study of Clouds has proposed a 
classification of clouds under Families A, B, C, and D, Forms a, b, and c, 
and Genera i to 10 inclusive. But since the definitions of most of these latter 
differ but little from those given in the International Cloud Atlas, 2d edition, 
Paris. 1910, and since the new Atlas has not 3''et been generally accepted, the 
well known definitions of the older Atlas are adhered to in Table 113. 
Table 11 4. Beaufort zveafher notation. 

This table has been revised in the library of the United States Weather 
Bureau, and represents the current practice of American and British ob- 
servers in the use of the Beaufort letters. 
Table 115. International code for horizontal visibility. 

The code for horizontal visibility is used by a large number of Nations 
and was adopted by the International Commission for Air Navigation. 
Reference : Convention relating to the Regulation of Aerial Navigation dated 
October 13, 1919; corrected text of May 1929. The seat of the Commission 
and of its permanent Secretariat has been fixed at No. 20 Avenue Kleber, 
Paris. 
Table 116. I^ist of meteorological stations. 

This list has been extensively revised, mainly by large additions for the 
continents of South America,' Asia, and Africa. It includes stations for which 
data appear in the " Reseau Mondial " of the British Meteorological Ofiice for 
1922 (published 1929), which were selected to represent, as far as available 
data permitted, the meteorology of all land areas of the globe, on the basis 
of two, or in some cases three, stations for each ten-degree square of latitude 
and longitude. Many additional stations are included for some countries, and 
especially for the United States. 

No attempt has been made in this edition of the Smithsonian Tables 
to indicate the " order " of the several stations, according to the definitions 
adopted at the Vienna Congress of 1873; as, owing to the present wide- 
spread use of self-recording instruments, the old distinction between first 
and second order stations has lost much of its importance. 

Several stations included in the list are no longer in operation. Data 
concerning the locations and altitudes of these stations are still valuable, 
in view of the frequent use made of their records in meteorological and cli- 
matological studies. 

In general, the established English spellings of geographical names in 
foreign countries have been followed. Where no English name was established, 
native orthography has been followed. 



THERMOMETRICAL TABLES 



Conversion of thermometric scales — ■ 

Approximate Absolute, Centigrade, Fahrenheit, and Reau- 
mur scales Table i 

Fahrenheit scale to Centigrade Table 2 

Centigrade scale to Fahrenheit Table 3 

Centigrade scale to Fahrenheit, near the boiling point of 

water Table 4 

Differences Fahrenheit to differences Centigrade .... Table 5 

Differences Centigrade to differences Fahrenheit . . . Table 6 

Correction for the temperature of the emergent mercurial column 
of thermometers — 

Correction for Fahrenheit thermometers Table 7 

Correction for Centigrade thermometers ...... Table 8 



Table 1 . 

APPROXIMATE ABSOLUTE, CENTIGRADE, FAHRENHEIT, AND REAUMUR 

SCALES. 

Conversion Formulae for Approximate Absolute (^1 ..4), Centigrade (C), Fahrenheit 
(F), and Reaumur (R) Scales. 





A 


■^•1=5/9 (F-: 


2) + 273 = C+273 = 5/4i? + 


273 








C = 5/9 (F - 


32) =5/4/? = .1.-4- 273 = -(F- 32) fi+ '+' + ' +) 
2 \ 10 100 1000 / 




F = 9/50 + 3- 


> = 9/4^ + 32 =9/5 U-A - 273) +32 = 2C( 


I 


) + 32 




R^4/9 (F- 


32) = 4/5 c = 4/5 U-A - 273) 












PROPORTION.\L PARTS. 






C > 

A.A S ' 


3 4 5 


6 7 




8 9 


F 1.8 3.6 
R .8 1.6 


5.4 7.2 oc 
2.4 3-2 4-0 


10.8 12.6 
4.8 5-6 


14.4 16.2 
6.4 7.2 


/ 


I 2 


3 4 5 


6 7 




3 9 


J 4 r -55* i-ii* 1.66* 2.22* 2.77* 


3-33* 3-88=» 


4.44* 5.00* 


A 


.44* .88* 1.33* 1.77* 2.22* 


2.66* 3.11^ 


3.55* 4.00* 


E 


I 2 


3 4 5 


6 7 


8 


9 


C r 
A.a[ ^-^5 2.5 


3.75 5.00 6.25 


7-50 8.75 


10.00 11.25 i 


F 


2.25 4-5 


D 6.75 9.00 11.25 


13-50 15.75 


18 


00 20.25 






* These last figures repeated indefinitely. 






A.A. 


C. 


F- 


R. 


A.A. 


C. 


F. 


R. 


A.A. 


C. 


F. 


R. 


375° 

374 
373 
372 
371 


102° 

lOI 

100 

99 
98 


2i5°6 
213.8 
212.0 
210.2 
208.4 


8i°.6 
80.8 
80.0 
79.2 
78.4 


350° 

349 
348 
347 
346 


77° 

76 

75 

74 

73 


i7o?6 
168.8 
167.0 
165.2 
163.4 


6i!6 
60.8 
60.0 
59-2 
58.4 


325° 

324 
323 


52° 

51 

50 

49 
48 


i2 5?6 
123.8 
122.0 
120.2 
118.4 


4i!6 
40.8 
40.0 
39-2 
38.4 


370 

36Q 
368 
367 
366 


97 
96 

95 
94 
93 


206.6 
204.8 
203.0 
201.2 
199.4 


77.6 
76.8 
76.0 
75-2 
74-4 


345 

344 

343 
342 
341 


72 
71 
70 

69 
68 


161.6 
159.8 
158.0 
156.2 
154.4 


57-6 
56.8 
56.0 

55-2 
54-4 


320 

319 
318 
317 
316 


47 
46 
45 
44 
43 


116.6 
114.8 
1 13.0 
III. 2 
109.4 


37-6 
36.8 
36.0 
35-2 
34-4 


365 

364 
363 
362 
361 


92 

91 
90 
89 

88 


197.6 
195.8 
194.0 
192.2 
190.4 


73-6 
72.8 
72.0 
71.2 
70.4 


340 

339 
338 
337 
336 


67 
66 
65 
64 
63 


152.6 
150.8 
149.0 
147.2 
145.4 


53-6 
52.8 
52.0 

51.2 

50.4 


315 

314 
313 
312 

311 


42 
41 
40 
39 
38 


107.6 
105.8 
104.0 
102.2 
100.4 


33-6 
32.8 
32.0 
31.2 
30.4 


360 

350 
3S8 
357 
3S6 


87 
86 

85 
84 
83 


188.6 
186.8 
185.0 
183.2 
181.4 


69.6 
68.8 
68.0 
67.2 
66.4 


335 

334 
333 
332 
331 


62 
61 
60 
59 

58 


143.6 
141.8 
140.0 
138.2 
136.4 


49.6 
48.8 
48.0 

47.2 
46.4 


310 

309 
308 

307 
306 


37 
36 
35 
34 
33 


98.6 
96.8 
95.0 
93-2 
91.4 


29.6 
28.8 
28.0 
27.2 
26.4 


355 

354 
353 
352 
351 


82 
81 
80 

79 
78 


179.6 

177.8 
176.0 
174.2 
172.4 


65.6 
64.8 
64.0 
63.2 
62.4 


330 

329 
328 
327 
326 


57 
56 
55 
54 
53 


134.6 
132.8 
131.0 
129.2 
127.4 


45-6 
44.8 
44.0 
43-2 
42.4 


305 

304 
303 
302 
301 


32 
31 
30 
29 
28 


89.6 
87.8 
86.0 
84.2 
82.4 


25.6 
24.8 
24.0 
23.2 
22.4 


350 


77 


170.6 


61.6 


325 


52 


125.6 


41.6 


300 


27 


80.6 


21.6 


A.A. 


C. 


F. 


R. 


A.A. 


C. 


F. 


R. 


A.A. 


C. 


F. 


R. 



Smithsonian Tables. 



Table 1 
APPROXIMATE ABSOLUTE, CENTIGRADE, FAHRENHEIT, AND REAUMUR 

SCALES. 



A. A. 


C. 

2f 


F. 


R. 


A. A. 


C. 


F. 


R. 


A. A. 


C. 


F. 


R. 


300° 


8o°6 


2I°6 


250° 


-23° 


- 9°4 


-i8.°4 


200° 


-73° 


- 99°4 


-58.°4 


299 


2b 


78.8 


20.S 


249 


24 


II. 2 


19.2 


199 


74 


101.2 


59-2 


298 


25 


77.0 


20.0 


248 


25 


I3-0 


20.0 


198 


75 


103.0 


60.0 


297 


24 


75-2 


19.2 


247 


26 


14.8 


20.8 


197 


76 


104.8 


60.8 


296 


23 


73-4 


18.4 


246 


27 


16.6 


21.6 


196 


77 


106.6 


61.6 


295 


22 


71.6 


17.6 


245 


-28 


-18.4 


-22.4 


195 


-78 


-108.4 


—62.4 


294 


21 


69.8 


16.8 


244 


29 


20.2 


23.2 


194 


79 


110.2 


63.2 


293 


20 


68.0 


16.0 


243 


30 


22.0 


24.0 


193 


80 


112.0 


64.0 


' 292 


19 


66.2 


15.2 


242 


31 


23.8 


24.8 


192 


81 


113.8 


64.8 


291 


18 


64.4 


14.4 


241 


32 


25.6 


25.6 


191 


82 


115.6 


65-6 


290 


17 


62.6 


13.6 


240 


-11 


-27.4 


-26.4 


190 


-83 


-117.4 


-66.4 


289 


16 


60.8 


12.8 


239 


34 


29.2 


27.2 


189 


84 


119. 2 


67.2 


288 


15 


59-0 


12.0 


238 


35 


31.0 


28.0 


188 


85 


121.0 


68.0 


287 


14 


57-2 


II. 2 


237 


36 


32.8 


28.8 


187 


86 


122.8 


68.8 


286 


13 


55-4 


10.4 


236 


37 


34-6 


29.6 


186 


87 


124.6 


69.6 


285 


12 


53-6 


9.6 


235 


-38 


-36.4 


-30-4 


185 


-88 


-126.4 


-70.4 


284 


II 


Si-8 


8.8 


234 


39 


38.2 


31.2 


184 


89 


128.2 


71.2 


283 


10 


So.o 


8.0 


233 


40 


40.0 


32.0 


183 


90 


130.0 


72.0 


282 


9 


48.2 


7.2 


232 


41 


41.8 


32.8 


182 


91 


131-8 


72.8 


281 


8 


46.4 


6.4 


231 


42 


43-6 


33-6 


181 


92 


133-6 


73-6 


280 


7 


44.6 


5-6 


230 


-43 


-45-4 


-34-4 


180 


-93 


-135-4 


-74-4 


279 


6 


42.8 


4.8 


229 


44 


47.2 


35-2 


179 


94 


137-2 


75-2 


278 


5 


41.0 


4.0 


228 


45 


49.0 


36.0 


178 


95 


139.0 


76.0 


277 


4 


39-2 


3-2 


227 


46 


50.8 


36.8 


177 


96 


140.8 


76.8 


276 


3 


37-4 


2.4 


226 


47 


52.6 


37-6 


176 


97 


142.6 


77.6 


275 


+ 2 


35-6 


+ 1.6 


225 


-48 


-54-4 


-38.4 


175 


-98 


-144.4 


-78.4 


274 


+ I 


33-8 


+ 0.8 


224 


49 


56.2 


39-2 


174 


99 


146.2 


79.2 


273 


± 


32.0 


± 0.0 


223 


50 


58.0 


40.0 


173 


100 


148.0 


80.0 


1 272 


- I 


30.2 


- 0.8 


222 


51 


50.8 


40.8 


172 


lOI 


149.8 


80.8 


271 


- 2 


28.4 


- 1.6 


221 


52 


61.6 


41.6 


171 


102 


151.6 


81.6 


270 


- 3 


26.6 


- 2.4 


220 


-53 


-634 


-42.4 


170 


-103 


-153-4 


-82.4 


269 


4 


24.8 


Z-'- 


219 


54 


65.2 


43-2 


169 


104 


155-2 


83-2 


268 


5 


23.0 


4.0 


218 


55 


67.0 


44.0 


168 


105 


157-0 


84.0 


267 


6 


21.2 


4.8 


217 


56 


68.8 


44.8 


167 


106 


158.8 


84.8 


266 


7 


19.4 


5-6 


216 


57 


70.6 


45-6 


166 


107 


160.6 


85.6 


265 


- 8 


17.6 


- 6.4 


215 


-58 


-72.4 


-46.4 


165 


-108 


-162.4 


-86.4 


264 


9 


15-8 


7.2 


214 


59 


74.2 


47.2 


164 


109 


164.2 


87.2 


263 


10 


14.0 


8.0 


213 


60 


76.0 


48.0 


163 


no 


166.0 


88.0 


262 


II 


12.2 


8.8 


212 


61 


77.8 


48.8 


162 


III 


167.8 


88.8 


261 


12 


10.4 


9.6 


211 


62 


79.6 


49.6 


161 


112 


169.6 


89.6 


260 


-13 


8.6 


— 10.4 


210 


-63 


-81.4 


-50-4 


160 


-113 


-171.4 


-90.4 


259 


14 


6.8 


II. 2 


209 


64 


83.2 


51.2 


159 


114 


173-2 


91.2 


258 


15 


5-0 


12.0 


208 


65 


8s.o 


52.0 


158 


115 


175-0 


92.0 


257 


16 


3-2 


12.8 


207 


66 


86.8 


52.8 


157 


116 


176.8 


92.8 


256 


17 


+ 1.4 


13.6 


206 


67 


88.6 


53-6 


156 


117 


178.6 


93-6 


255 


-18 


-0.4 


-14.4 


205 


-68 


-90.4 


-54-4 


155 


-118 


-180.4 


-94.4 


254 


19 


2.2 


IS-2 


204 


69 


92.2 


55-2 


154 


119 


182.2 


95-2 


253 


20 


4.0 


16.0 


203 


70 


94.0 


56.0 


153 


120 


184.0 


96.0 


252 


21 


5-8 


16.8 


202 


71 


95-8 


56.8 


152 


121 


185.8 


96.8 


251 


22 


7.6 


17.6 


201 


72 


97.6 


57-6 


151 


122 


187.6 


97.6 


250 


-23 


-9.4 


-18.4 


200 


-73 


-99.4 


-58.4 


150 


-123 


-189.4 


-98.4 


A. A 


C. 


F. 


R. 


A. A. 


C. 


F. 


R. 


A. A. 


c. 


F. 


R. 



Smithsonian Tables. 



Table 1 

APPROXIMATE ABSOLUTE, CENTIGRADE, FAHRENHEIT, AND REAUMUR 

SCALES. 



A. A. 


1 ^• 


F. 


R. 


A. A. 


C. 


F. 


R. 


A. A. 


C. 


F. 


R. 


150^ 


-123° 


-i89?4 


- 984 


100° 


-173° 


-2 79-4 


-1384 


50° 


-223° 


-3694 


-178-4 i 


149 


124 


191. 2 


99-2 


99 


174 


281.2 


139.2 


49 


224 


371.2 


179.2 


148 


125 


193.0 


lOO.O 


98 


17s 


283.0 


140.0 


48 


225 


373-0 


180.0 


147 


126 


194.8 


100.8 


97 


176 


284.8 


140.8 


47 


226 


374-8 


180.8 


146 


127 


196.6 


101.6 


96 


177 


286.6 


141. 6 


46 


^227 


376.6 


181.6 


145 


-128 


-198.4 


-102.4 


95 


-178 


-28S.4 


-142.4 


45 


-228 


-378.4 


-182.4 


144 


129 


200.2 


103.2 


94 


179 


290.2 


143-2 


44 


229 


380.2 


183.2 


143 


130 


202.0 


104.0 


93 


180 


292.0 


144.0 


43 


230 


382.0 


184.0 


142 


131 


203.8 


104.8 


92 


181 


293-8 


144.8 


42 


231 


383-8 


184.8 


141 


132 


205.6 


105.6 


91 


182 


295.6 


145.6 


41 


232 


385-6 


185.6 


140 


-133 


-207.4 


-106.4 


90 


-183 


-297.4 


-146.4 


40 


-233 


-387-4 


-186.4 


139 


134 


209.2 


107.2 


89 


184 


299.2 


147.2 


39 


234 


389-2 


187.2 


138 


135 


211.0 


108.0 


88 


185 


301.0 


148.0 


38 


235 


391.0 


188.0 


137 


136 


212.8 


108.8 


87 


186 


302.8 


148.8 


37 


236 


392-8 


188.8 


136 


137 


214.6 


109.6 


86 


187 


304.6 


149.6 


36 


237 


394-6 


189.6 


135 


-138 


-216.4 


-110.4 


85 


-188 


-306.4 


-150.4 


35 


-238 


-396.4 


-190.4 


134 


139 


218.2 


III. 2 


84 


189 


308.2 


151.2 


34 


239 


398.2 


191. 2 


133 


140 


220.0 


112. 


83 


190 


310.0 


152.0 


33 


240 


400.0 


192.0 


132 


141 


221.8 


112.8 


82 


191 


311.8 


152.8 


32 


241 


401.8 


192.8 


131 


142 


223.6 


1 13.6 


81 


192 


313-6 


153.6 


31 


242 


403.6 


193.6 


130 


-143 


-225.4 


-114.4 


80 


-193 


-315-4 


-154.4 


30 


-243 


-405-4 


-194.4 


129 


144 


227.2 


115. 2 


79 


194 


317.2 


155-2 


29 


244 


407.2 


195-2 


128 


145 


229. c 


116. 


78 


195 


319.0 


156.0 


28 


245 


409.0 


196.0 


127 


146 


230.8 


116.8 


77 


196 


320.8 


156.8 


27 


246 


410.8 


196.8 


126 


147 


232.6 


117. 6 


76 


197 


322.6 


157-6 


26 


247 


412.6 


197.6 


125 


-148 


-234-4 


-11S.4 


75 


-198 


-324-4 


-158.4 


25 


-248 


-414.4 


-198.4 


124 


149 


236.2 


119. 2 


74 


199 


326.2 


159.2 


24 


249 


416.2 


199.2 


123 


150 


238.0 


120.0 


73 


200 


328.0 


160.0 


23 


250 


418.0 


200.0 


122 


151 


239.8 


120.8 


72 


201 


329-8 


160.8 


22 


251 


419-8 


200.8 


121 


152 


241.6 


121. 6 


71 


202 


3316 


161.6 


21 


252 


421.6 


201.6 


120 


-153 


-243-4 


— 122.4 


70 


-203 


-333-4 


-162.4 


20 


-253 


-423-4 


-202.4 


119 


154 


245.2 


123.2 


69 


204 


335-2 


163.2 


19 


254 


425.2 


203.2 


118 


IS5 


247.0 


124.0 


68 


205 


337-0 


164.0 


18 


255 


427.0 


204.0 


117 


156 


248.8 


124.8 


67 


206 


338-8 


164.8 


17 


256 


428.8 


204.8 


116 


157 


250.6 


125.6 


66 


207 


340.6 


165.6 


16 


257 


430.6 


205.6 


115 


-158 


-252.4 


-126.4 


65 


-208 


-342.4 


-166.4 


15 


-258 


-432.4 


-206.4 


114 


159 


254.2 


127.2 


64 


209 


344-2 


167.2 


14 


259 


434-2 


207.2 


113 


160 


256.0 


128.0 


63 


210 


346.0 


168.0 


13 


260 


436.0 


208.0 


112 


161 


257-8 


128.8 


62 


211 


347-8 


168.8 


12 


261 


437-8 


208.8 


III 


162 


259.6 


129.6 


61 


212 


349-6 


169.6 


II 


262 


439-6 


209.6 


no 


-163 


-261.4 


-130.4 


60 


-213 


-351-4 


-170.4 


10 


-263 


-441.4 


-210.4 


109 


164 


263.2 


131. 2 


59 


214 


353-2 


171. 2 


9 


264 


443-2 


211. 2 


108 


165 


265.0 


132.0 


58 


215 


355-0 


172.0 


8 


265 


445 -o 


212.0 


107 


166 


266.S 


132.8 


57 


216 


356-8 


172.8 


7 


266 


446.8 


212.8 


106 


167 


268.6 


133-6 


56 


217 


358.6 


173-6 


6 


267 


448.6 


213.6 


105 


-168 


-270.4 


-134-4 


55 


-218 


-360.4 


-174.4 


5 


-268 


-450-4 


-214.4 


104 


169 


272.2 


135-2 


54 


219 


362.2 


175-2 


4 


269 


452.2 


215-2 


103 


170 


274.0 


136.0 


53 


220 


364.0 


176.0 


3 


270 


454-0 


216.0 


102 


171 


275.8 


136.8 


52 


221 


365-8 


176.8 


2 


271 


455-8 


216.8 


lOI 


172 


277.6 


137.6 


51 


222 


367.6 


177.6 


I 


272 


457-6 


217.6 


100 


-173 


-279-4 


-138.4 


50 


-223 


-369-4 


-178.4 





-273 


-459-4 


-218.4 


A. A. 


C. 


F. 


R. 


A. A. 


C. 


F. 


R. 


A. A. 


C. 


F. 


R. 



Smithsonian Tables. 



Table 2. 



FAHRENHEIT SCALE TO CENTIGRADE. 



Fahren- 
heit. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


1 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


1+130° 


+54°44 


+54.50 


+54.56 


+54°6i 


+54.67 


+54-72 


+54.78 


+54.83 


+54^89 


+54°94 


129 


53-89 


53-94 


54.00 


54.06 


54.11 


5+17 


54.22 


54.28 


54-33 


54-39 


128 


53-33 


53-39 


53-44 


53.50 


53.56 


53-61 


53.67 


53.72 


53-78 


53-83 


127 


52.78 


52.83 


52.89 


52.94 


53.00 


53-06 


53.11 


53.17 


53-22 


53-28 


126 


52.22 


52.28 


52.33 


52.39 


52.44 


52.50 


52.56 


52.61 


52.67 


52.72 


+125 


f5i-67 


-151-72 


+51.78 


+51.83 


+51.89 


+51.94 


+52.00 


+52.06 


+52.11 


+52.17 


J 124 


5I-II 


51-17 


51.22 


51.28 


51.33 


51.39 


51.44 


51.50 


51-56 


51.61 


123 


50.56 


50.61 


50.67 


50.72 


50.78 


50.83 


50.89 


50.94 


51.00 


51.06 


122 


50.00 


50.06 


50.11 


50.17 


50.22 


50.28 


50.33 


50.39 


50.44 


50.50 


121 


49-44 


49-50 


49.56 


49.61 


49.67 


49-72 


49.78 


49-83 


49.89 


49.94 


+120 


+48.89 


+4^-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 


iiS 


47.78 


47.83 


47-89 


47.94 


48.00 


48.06 


48. 1 1 


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 


45.7S 


45.83 


45-89 


45.94 


46.00 


46.06 


113 


45.00 


4506 


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 


III 


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 


+43-50 


+43.56 


+43.61 


+43-67 


+43-72 


+43-78 


+43-83 


109 


42.7S 


42.83 


42.89 


42.94 


43-00 


43.06 


43-11 


43-17 


43-22 


43-28 


loS 


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. II 


41.17 


41.22 


41.28 


41.33 


41.39 


41.44 


41.50 


41.56 


41.61 


tI05 


+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 


102 


38.89 


38-94 


39.00 


39.06 


39-11 


39.17 


39-22 


39.28 


39-33 


39-39 


lOI 


38.33 


38.39 


38.44 


38.50 


38.56 


38.61 


38.67 


38.72 


38.78 


38.83 


+100 


+37-78 


+37.83 


+37.89 


+37.94 


+38.00 


+3S.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 


96 


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 


+35-39 


+35.44 


+35.50 


94 


3+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 


33-33 


33-39 


33.44 


33.50 


33.56 


33.61 


33-67 


33.72 


33-78 


33-83 


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 


32.17 


88 


31. II 


31-17 


31.22 


31.28 


31-33 


31-39 


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.J9 


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 


S3 


28.33 


28.39 


28.44 


28.50 


28.56 


28.61 


28.67 


28.72 


28.78 


28.83 


82 


27.78 


27.83 


27.89 


27.94 


28.00 


28.06 


28.11 


28.17 


28.22 


28.28 


81 • 


27.22 


27.28 


27.33 


27.39 


27.44 


27.50 


27.56 


27.61 


27.67 


27.72 


+ 80 


+26.67 


+26.72 


+26.78 


+26.83 


+26.89 


+26.94 


+27.00 


+27.06 


+27.11 


+27.17 




.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 

— A 



Smithsonian Tables. 



Table 2. 



FAHRENHEIT SCALE TO CENTIGRADE. 



Fahren- 
heit. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


+80° 


+26?67 


+26?72 


+26?78 


+26?83 


+26?89 


+26?94 


+27?oo 


+27?o6 


+27?n 


+27?i7 


79 


26.11 


26.17 


26.22 


26.28 


26.33 


26.39 


26.44 


26.50 


26.56 


26.61 


78 


25-56 


25.61 


25-67 


25.72 


25-78 


25.83 


25.89 


25-94 


26.00 


26.06 


77 


25.00 


25.06 


25.11 


25.17 


25.22 


25.28 


25-33 


25.39 


25.44 


25.50 


76 


24.44 


24.50 


2+56 


24.61 


24.67 


24.72 


24.78 


24.83 


24.89 


24.94 


+75 


+23.89 


+23.94 


+24.00 


+24.06 


+24.11 


+24.17 


+24.22 


+24.28 


+24.33 


+24-39 


74 


23- .33 


23-39 


23-44 


23-50 


23-56 


23.61 


23.67 


23.72 


23.78 


23-83 


73 


22.78 


22.83 


22.89 


22.94 


23.00 


23.06 


23.11 


23- 17 


23.22 


23-28 


72 


22.22 


22.28 


22.33 


22.39 


22.44 


22.50 


22.56 


22.61 


22.67 


22.72 


71 


21.67 


21.72 


21.78 


21.83 


21.89 


21.94 


22.00 


22.06 


22.11 


22.17 


+70 


+21. II 


+21.17 


+21.22 


+21.28 


+21.33 


+21.39 


+21.44 


+21.50 


+21.56 


+ 21.61 


69 


20.56 


20.61 


20.67 


20.72 


20.78 


20.83 


20.89 


20.94 


21.00 


21.06 


68 


20.00 


20.06 


20.11 


20.17 


20.22 


20.28 


20.33 


20.39 


20.44 


20.50 


67 


19.44 


19-50 


19-56 


19.61 


19.67 


19.72 


19.78 


1983 


19.89 


19.94 


66 


18.89 


18.94 


19.00 


19.06 


19. 1 1 


19.17 


19.22 


19.28 


19-33 


1939 


+65 


+18.33 


+18.39 


+18.44 


+18.50 


+18.56 


+18.61 


+18.67 


+18.72 


+ 18.78 


+18.83 


64 


17.78 


17.83 


17.89 


17-94 


18.00 


18.06 


18. 1 1 


18.17 


18.22 


18.28 


63 


17.22 


17.28 


17-33 


17-39 


17.44 


17.50 


17-56 


17.61 


17.67 


17.72 


62 


16.67 


16.72 


16.78 


16.83 


16.89 


16.94 


17.00 


17.06 


17.11 


17.17 


61 


16. 1 1 


16.17 


16.22 


16.28 


16.33 


16.39 


16.44 


16.50 


16.56 


16.61 


+60 


+15.56 


+15-61 


+15.67 


+15.72 


+15.78 


+15-83 


+15-89 


+15.94 


+16.00 


+ 16.06 


59 


15.00 


15.06 


I5-II 


15.17 


15.22 


15.28 


15-33 


15-39 


15-44 


15.50 


58 


14.44 


14.50 


14.56 


14.61 


1+67 


14.72 


14.78 


14.83 


14.89 


14.94 


57 


13.89 


13-94 


14.00 


14.06 


14. 1 1 


14.17 


14.22 


14.28 


1+33 


1+39 


56 


13.33 


13-39 


13-44 


13.50 


13.56 


13.61 


13.67 


13.72 


13-78 


13.83 


+55 


+12.78 


+12.83 


+12.89 


+12.94 


+13.00 


+13.06 


+13-11 


+13.17 


+13.22 


-T 13-28 


54 


12.22 


12.28 


12.33 


12.39 


12.44 


12.50 


12.56 


12.61 


12.67 


12.72 


53 


11.67 


11.72 


11.78 


11.83 


11.89 


11.94 


12.00 


12.06 


12.11 


12.17 


52 


II. II 


11.17 


11.22 


11.28 


11-33 


11.39 


11.44 


11.50 


11-56 


II. 61 


51 


10.56 


10.61 


10.67 


10.72 


10.78 


10.83 


10.89 


10.94 


11.00 


TI.06 


+50 


+10.00 


+10.06 


+10. 1 1 


+ 10.17 


+10.22 


+10.28 


+10.33 


+10.39 


+10.44 


+ 10.50 


49 


9-44 


9-50 


9-56 


9.61 


9.67 


9.72 


9-78 


9.83 


9.89 


9-94 


48 


8.89 


8.94 


9.00 


9.06 


9.11 


9.17 


9.22 


9.28 


9-33 


9.39 


' 47 


8.33 


8-39 


8.44 


8.50 


8.56 


8.61 


8.67 


8.72 


8.78 


8.83 


46 


7.78 


7.83 


7.89 


7-94 


8.00 


8.06 


8. II 


8.17 


8.22 


8.28 


+45 


+ 7.22 


+ 7.28 


+ 7-33 


+ 7.39 


+ 7-44 


+ 7.50 


+ 7.56 


+ 7.61 


+ 7-67 


+ 7.72 


44 


6.67 


6.72 


6.78 


6.83 


6. 89 


6.94 


7.00 


7.06 


7.11 


7.17 


43 


6.11 


6.17 


6.22 


6.28 


6-33 


6.39 


6.44 


6.50 


6.56 


6.61 


42 


5.56 


5-61 


567 


5-72 


5-78 


5-83 


5-89 


5.94 


6.00 


6.06 


41 


5.00 


5.06 


5-II 


5.17 


5.22 


5-28 


5-33 


5.39 


5-44 


5.50 


+40 


+ 4.44 


+ 4.50 


+ 4-56 


+ 4-6i 


+ 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-II 


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 


+ I. II 


+ 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 


+ 0.7S 


+ 0.83 


+ 0.89 


+ 0.94 


+ 1. 00 


+ 1.06 


32 


0.00 


+ 0.06 


+ 0. II 


+ 0.17 


+ 0.22 


+ 0.2S 


+ 0.33 


+ 0.39 


+ 0.44 


+ 0.50 


31 


- 0.56 


— 0.50 


- 0.44 


- 0.39 


- 0.33 


- 0.2S 


— 0.22 


- 0.17 


— O.II 


— 0.06 


+30 


— I. II 


— 1.06 


— 1. 00 


- 0.94 


— 0.89 


- 0.83 


- 0.78 


- 0.72 


— 0.67 


— 0.61 




.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 



Smithsonian Table*. 



Table 2. 



FAHRENHEIT SCALE TO CENTIGRADE. 



Fahren- 
heit. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


+30° 


- i?ii 


- i?o6 


— i?oo 


- o?94 


- o?89 


-o?83 


- o?78 


— 0?72 


- o?67 


- o?6i 


29 


1.67 


1.61 


1-56 


1.50 


1.44 


1-39 


1-33 


1.28 


1.22 


1. 17 


28 


2.22 


2.17 


2. II 


2.06 


2.00 


1-94 


1.89 


1.83 


1.78 


1.72 


27 


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-II 


3-06 


3.00 


2.94 


2.89 


2.83 


+ 25 


- 3-89 


-3-83 


-3-78 


- 3-72 


-3-67 


-3-61 


-3.56 


- 3-50 


- 3-44 


- 3-39 


24 


4.44 


4-39 


4-33 


4.28 


4.22 


4.17 


4.11 


4.06 


4.00 


3-94 


23 


5.00 


4.94 


4.89 


4.83 


4-78 


4-72 


4.67 


4.61 


4.56 


4-50 


22 


5.56 


5-50 


5-44 


5-39 


5.33 


5-28 


5.22 


5-17 


5-11 


5-06 


21 


6.11 


6.06 


6.00 


5-94 


5-89 


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 


- 6.2S 


— 6.22 


-6.17 


19 


7.22 


7.17 


7. II 


7.06 


7.00 


6.94 


6.89 


6.83 


6.78 


6.72 


18 


7.78 


7-72 


7.67 


7.61 


7-56 


7.50 


7.44 


7.39 


7-33 


7.28 


17 


S.33 


8.28 


8.22 


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 


8.61 


8.56 


8.50 


8.44 


8.39 


+ 15 


- 9-44 


- 9-39 


- 9-33 


- 9.28 


— 9.22 


- 9-17 


- 9.11 


— 9.06 


— 9.00 


- 8.94 


14 


10.00 


9-94 


9.89 


9- S3 


9.7S 


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 


lO.II 


10.06 


12 


II. II 


11.06 


11.00 


10.94 


10.89 


10.83 


to.78 


10.72 


10.67 


10.61 


II 


11.67 


II. 61 


11.56 


11.50 


11.44 


"•39 


11-33 


11.28 


11.22 


II. 17 


+ 10 


--12.22 


—12.17 


—12. II 


—12.06 


— 12.00 


-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 


13.1-7 


13.11 


13.06 


13.00 


12.94 


12.89 


12.83 


7 


13.89 


13-83 


13-78 


13-72 


13-67 


13.61 


13-56 


13-50 


13-44 


13-39 


6 


14.44 


14-39 


14-33 


14.28 


14.22 


14.17 


14.11 


14.06 


14.00 


13-94 


+ 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- -I 


15.06 


3 


16. II 


16.06 


16.00 


15-94 


15-89 


15-83 


15.78 


15-72 


I6-67 


15.61 


2 


16.67 


16.61 


16.56 


16.50 


16.44 


16.39 


16.33 


16.28 


16.22 


16.17 


I 


17.22 


17.17 


17.11 


17.06 


17.00 


16.94 


16.89 


16.83 


16.78 


16.72 


+ 


17.78 


17.72 


17.67 


17.61 


17-56 


17.50 


17.44 


17-39 


17-33 


17.28 


- 


-17.78 


-17.83 


-17.89 


-17.94 


—18.00 


-t8.o6 


-18. 1 1 


-18.17 


-18.22 


-18.28 


I 


18.33 


18.39 


18.44 


18.50 


18.56 


18.61 


18.67 


18.72 


18.78 


18.83 


2 


18.89 


18.94 


19.00 


19.06 


19. II 


19.17 


19.22 


19.28 


19-33 


IC39 


3 


19.44 


19-50 


19-56 


19.61 


19.67 


19.72 


19.78 


19-83 


19.89 


19.94 


4 


20.00 


20.06 


20.11 


20.17 


20.22 


20.28 


20.33 


20.39 


20.44 


20.50 


- 5 


-20.56 


-20.61 


—20.67 


—20.72 


-20.78 


-20.83 


—20.89 


-20.94 


— 21.00 


—21.06 


6 


21. II 


21.17 


21.22 


21.28 


21-33 


21.39 


21.44 


21.50 


21.56 


21.61 


7 


21.67 


21.72 


21.78 


21.83 


21.89 


21.94 


22.00 


22.06 


22.11 


22.17 


8 


22.22 


22.28 


22.33 


22.39 


22.44 


22.50 


22.56 


22.61 


22.67 


22.72 


9 


22.78 


22.83 


22.89 


22.94 


23.00 


23.06 


23.11 


23-17 


23.22 


23.28 


-10 


-23-33 


-23-39 


-23-44 


-23.50 


-23-56 


-23.61 


-23.67 


-23-72 


-23-78 


-23.83 


II 


23-89 


23-94 


24.00 


24.06 


24.11 


24.17 


24.22 


24.28 


24-33 


24.39 


12 


24.44 


24.50 


24-56 


24.61 


24.67 


24.72 


24.78 


24.83 


24.89 


24.94 


13 


25.00 


25-06 


25.11 


25.17 


25.22 


25.28 


25.33 


25-39 


25-44 


25.50 


14 


25-56 


25.61 


25-67 


25.72 


25-78 


25-83 


25.89 


25-94 


26.00 


26.06 


- 15 


-26.11 


—26.17 


—26.22 


-26.28 


-26.33 


-26.39 


-26.44 


—26.50 


-26.56 


-26.61 


16 


26.67 


26.72 


26.78 


26.83 


26.89 


26.94 


27.00 


27.06 


27.11 


27.17 


17 


27.22 


27.28 


27-33 


27.39 


27-44 


27.50 


27.56 


27.61 


27.67 


27.72 


18 


27-78 


27.83 


27.89 


27.94 


28.00 


28.06 


28.11 


28.17 


28.22 


28.28 


19 


28.33 


28.39 


28.44 


28.50 


28.56 


28.61 


28.67 


28.72 


28.78 


28.83 


-20 


-28.89 


-28.94 


—29.00 


—29.06 


—29. 1 1 


-29.17 


—29.22 


—29.28 


-29-33 


-29-39 




.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 

I 



••"▼"•OMAN Table*. 



Table 2. 



FAHRENHEIT SCALE TO CENTIGRADE. 



Fahren- 
heit. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


-20° 


— 28?89 


-28?94 


— 29?00 


29?o6 


-29?II 


— 2q"'i7 


— 29?22 


-29?28 


-29-33 


-29-39 


21 


29.44 


29.50 


29.56 


29.61 


29.67 


29.72 


29.78 


29-83 


29.89 


29.94 


22 


30.00 


30.06 


30.11 


30.17 


30.22 


30.28 


30.33 


30-39 


30-44 


30-50 


23 


30.56 


30.61 


30.67 


30.72 


30.78 


30.83 


30. 89 


30-94 


31.00 


31.06 


24 


31. II 


31.17 


31.22 


31.28 


31-33 


3f.39 


31.44 


31-50 


31-56 


31.61 


-25 


-31-67 


-31.72 


-31.78 


-31-83 


31.89 


-31-94 


—32.00 


-32.06 


—32.11 


-32.17 


26 


32.22 


32.28 


32.33 


32-39 


32-44 


32-50 


32.56 


32-61 


32.67 


32.72 


27 


32.78 


32.83 


32.89 


32-94 


33-00 


33-06 


33-11 


33-17 


33-22 


33-28 


28 


33-33 


33-39 


33-44 


33-50 


33-56 


33-61 


33-67 


33-72 


33-7S 


33-83 


29 


33-89 


33-94 


34.00 


34-06 


34-11 


34-17 


34.22 


34-28 


34-33 


34-39 


-30 


-34-44 


-34-50 


-34-56 


-34.61 


-34-67 


-34-72 


-34.78 


-34.83 


-34-89 


-34-94 


31 


35-00 


35-06 


35-11 


35.17 


35-22 


35-28 


35-33 


35-39 


35-44 


35-50 


32 


35.56 


35-61 


35-67 


35-72 


35-78 


35-83 


35-89 


35-94 


36.00 


36.06 


33 


36.11 


36-17 


36.22 


36.28 


36.33 


36.39 


36-44 


36-50 


36-56 


36.61 


34 


36.67 


36.72 


36-78 


36.83 


36.89 


36.94 


37-00 


37-06 


37-11 


37.17 


-35 


-37.22 


-37.28 


-37-33 


-37-39 


-37.44 


-37.50 


-37-56 


-37.61 


-37-67 


-37.72 


36 


37.78 


37-83 


37-89 


37-94 


38.00 


38.06 


38.11 


38.17 


38.22 


38.28 


37 


38.33 


38-39 


38-44 


38-50 


38.56 


38.61 


38.67 


38.72 


38-78 


38.83 


38 


38.89 


38-94 


39-00 


39.06 


39-11 


39-17 


39-22 


39.28 


39-33 


39-39 


39 


39-44 


39.30 


39-56 


39.61 


39-67 


39-72 


39-78 


39-83 


39-89 


39-94 


-40 


—40.00 


—40.06 


—40.11 


-40.17 


—40.22 


—40.28 


-40.33 


-40.39 


-40.44 


-40-50 


41 


40.56 


40.61 


40.67 


40.72 


40.78 


40.83 


40.89 


40.94 


41.00 


41.06 


42 


41. II 


41.17 


41.22 


41. 28 


41-33 


41-39 


41-44 


41.50 


41.56 


41.61 


43 


41.67 


41.72 


41.78 


41.83 


41.89 


41.94 


42.00 


42,06 


42.11 


42.17 


44 


42.22 


42.28 


42.33 


42.39 


42.44 


42.5c 


42.56 


42.61 


42.67 


42.72 


-45 


-42.78 


-42.83 


-42.S9 


-42.94 


-43-00 


-43.06 


-43-11 


-43.17 


-43.22 


-43.28 


46 


43-33 


43-39 


43-44 


43-50 


43-56 


43.61 


43-67 


43-72 


43-78 


43.83 


47 


43- 89 


43-94 


44.00 


44.06 


44.11 


44.17 


44-22 


44-28 


44-33 


44-39 


48 


4<1.44 


44-50 


44-56 


44-61 


44-67 


44-72 


44.78 


44-83 


44-89 


44-94 ' 


49 


43.00 


45-06 


45-11 


45-17 


45-22 


45-28 


45-33 


45-39 


45-44 


45-50 


-50 


-45.56 


-45-61 


-45-67 


-45.72 


-45-78 


-45-83 


-45-89 


-45-94 


—46.00 


—46.06 


51 


46.11 


46.17 


46.22 


46.28 


46-33 


46-39 


46-44 


46.50 


46-56 


46.61 


52 


46.67 


46.72 


46.78 


46.83 


46.89 


46.94 


47.00 


47.06 


47.11 


47-17 


53 


47-22 


47-28 


47-33 


47-39. 


47-44 


47.50 


47.56 


47.61 


47-67 


47-72 


54 


47-78 


47-83 


47.89 


47-94 


48.00 


48.06 


48.11 


48.17 


48.22 


48.28 


-55 


-48.33 


-48.39 


-48.44 


-48.50 


-48-56 


-48.61 


-48.67 


-48.72 


-48.78 


-48.83 


56 


48.89 


48.94 


49.00 


49.06 


49.11 


49-17 


49-22 


49.28 


49-33 


49-39 


57 


49-44 


49-50 


49-56 


49.61 


49-67 


49.72 


49-78 


49-83 


49.89 


49-94 


58 


50.00 


50.06 


50.11 


50.17 


50.22 


50.28 


50.33 


50.39 


50-44 


50-50 


59 


50-56 


50-61 


50.67 


50.72 


50.78 


50.83 


50.89 


50.94 


51.00 


51.06 


-60 


-51. II 


-51-17 


-51.22 


-51-28 


-51-33 


-51.39 


-51.44 


-51-50 


-51-56 


-51.61 


6r 


51-67 


51-72 


51.78 


51-83 


51-89 


51.94 


52.00 


52.06 


52.11 


52.17 


62 


52.22 


52.28 


52-33 


52-39 


52-44 


52.50 


52.56 


52-61 


52-67 


52.72 


63 


52.78 


52.83 


52-89 


52-94 


53-00 


53 -06 


53.11 


53-17 


53-22 


53.28 


64 


53.33 


53-39 


53-44 


53-50 


53-56 


53-61 


53-67 


53-72 


53-78 


53-83 


-65 


-53-89 


-53-94 


-54.00 


-54-06 


-54-11 


-54.17 


-54.22 


-54-28 


-54-33 


-54-39 


66 


54-44 


54-50 


54-56 


54-61 


54-67 


54-72 


54.78 


54-83 


54-89 


54.94 


67 


55-00 


55-06 


55-11 


55-17 


55-22 


55-28 


55-33 


55-39 


55-44 


55-50 


68 


55-56 


55-61 


55-67 


55.72 


55-78 


55.83 


55-89 


55-94 


56.00 


56.06 


69 


56. 1 1 


56.17 


56.22 


56.28 


56.33 


56.39 


56.44 


56.50 


56-56 


56.61 1 


I -70 


-56.67 


-56.72 


-56.78 


-56.83 


-56.89 


-56.94 


-57-00 


-57.06 


-57-11 


-57-17 


i 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 



Smithsonian Tables. 



Table 2. 







FAHRENHEIT SCALE 1 


rO CENTIGRADE. 






Fahren- 
heit. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




c. 


c. 


c. 


C. 


c. 


c. 


c. 


c. 


C. 


c. 


-70° 


-56!67 


-56:72 


-56.-78 


-56^83 


-56°89 


-56?94 


-S7.°'^o 


-S7.o6 


-S7.°ii 


-57-°i7 


71 


57.22 


57.28 


57-33 


57-39 


57-44 


57.50 


57.56 


57.61 


57.67 


57-72 


72 


57-78 


57.83 


57-89 


57-94 


58.00 


58.06 


58.11 


,S8.I7 


58.22 


58.28 


73 


58.,^^ 


5^'^.39 


58.44 


58.50 


58.56 


58.61 


58.67 


58.72 


58.78 


58.83 


74 


58.89 


58.94 


59.00 


59.06 


59.11 


59.17 


59.22 


59-28 


59.33 


59-39 


-75 


-59-44 


-59-50 


-59-56 


-59.61 


-59-67 


-59.72 


-,S9.78 


-59-83 


-59.89 


-59-94 


76 


to.oo 


60.06 


60.11 


60.17 


60.22 


60.28 


60.33 


60.39 


60.44 


60.50 


77 


60.56 


60.61 


60.67 


60.72 


60.78 


60.83 


60.89 


60.94 


61.00 


61.06 


78 


61. II 


61.17 


61.22 


61.28 


61-33 


61.39 


61.44 


61.50 


61.56 


61.61 


79 


61.67 


61.72 


61.78 


61.83 


61.89 


61.94 


62.00 


62.06 


62.11 


62.17 


-80 


—62.22 


-62.28 


-62.33 


-62.39 


-62.44 


-62.50 


-62.56 


-62.61 


-62.67 


-62.72 


81 


62.78 


62.83 


62.89 


62.94 


63.00 


63.06 


63.11 


63-17 


63.22 


6^.28 


82 


63-33 


63-39 


63-44 


63.50 


63-56 


63.61 


63.67 


63.72 


63.78 


63-83 


83 


63.89 


63-94 


64.00 


64.06 


64.11 


64.17 


64.22 


64.28 


64.33 


64-39 


84 


64.44 


64.50 


64.56 


64.61 


64.67 


64.72 


64.78 


64.83 


64.89 


64.94 


-85 


-65.00 


-65.06 


-65.11 


-65.17 


-65.22 


-65.28 


-65.33 


-65-39 


-65.44 


-65-50 


86 


65-56 


65-61 


65.67 


65.72 


65-78 


65.83 


65.89 


65-94 


66.00 


66.06 


87 


66.11 


66.17 


66.22 


66.28 


66.33 


66.39 


66.44 


66.50 


66.56 


66.61 


88 


66.67 


66.72 


66.78 


66.83 


66.89 


66.94 


67.00 


67.06 


67.11 


67.17 


89 


67.22 


67.28 


67-33 


67.39 


67.44 


67.50 


67.56 


67.61 


67.67 


67.72 


-90 


-67-78 


-67-83 


-67.89 


-67.94 


-68.00 


-68.06 


-68.11 


-68.17 


-68.22 


-68.28 


91 


68.33 


68.39 


68.44 


68.50 


68.56 


68.61 


68.67 


68.72 


68.78 


68.83 


92 


68.89 


68.94 


69.00 


69.06 


69.11 


69.17 


69.22 


69.28 


69-33 


69.39 


93 


69.44 


69.50 


69.56 


69.61 


69.67 


69.72 


69.78 


69-83 


69.89 


69.94 


94 


70.00 


70.06 


70.11 


70.17 


70.22 


70.28 


70.33 


70.39 


70.44 


70.50 


-95 


-70.56 


-70.61 


-70.67 


-70.72 


-70.78 


-70.83 


-70.89 


-70.94 


-71.00 


-71.06 


96 


71. II 


71.17 


71.22 


71.28 


71-33 


71.39 


71.44 


71-50 


71.56 


71.61 


97 


71.67 


71.72 


71.78 


71-83 


71.89 


71.94 


72.00 


72.06 


72.11 


72.17 


98 


72.22 


72.28 


72-33 


72.39 


72-44 


72.50 


72.56 


72.61 


72.67 


72.72 


99 


72.78 


72.83 


72.89 


72.94 


73-00 


73.06 


73-11 


73-17 


73.22 


73.28 


-100 


-73-33 


-73-39 


-73-44 


-73.50 


-73-56 


-73.61 


-73-67 


-73-72 


-73-78 


-73.83 


lOI 


73-89 


73-94 


74.00 


74.06 


74.11 


74.17 


74.22 


74-28 


74-33 


74-39 


102 


74-44 


74-50 


74-56 


74.61 


74.67 


74.72 


74-78 


74-83 


74-89 


74-94 


103 


75.00 


75.06 


75-11 


75.17 


75.22 


75-28 


75-33 


75-39 


75-44 


75-50 


104 


75-56 


75-61 


75-67 


75.72 


75-78 


75-83 


75-89 


75-94 


76.00 


76.06 


-105 


-76.11 


-76.17 


-76.22 


-76.28 


-76.33 


-76-39 


-76.44 


-76.50 


-76.56 


-76.61 


106 


76.67 


76.72 


■76-78 


76.83 


76.89 


76-94 


77.00 


77.06 


77.11 


77.17 


107 


77.22 


77-28 


77-33 


77.39 


77-44 


77-50 


77-56 


77.61 


77.67 


77.72 


108 


77.78 


77-83 


77-89 


77-94 


78.00 


78.06 


78.11 


78.17 


78.22 


78.28 


109 


78-33 


78-39 


78.44 


78-50 


78.56 


78.61 


78.67 


78.72 


78.78 


78.83 


-110 


-78.89 


-78.94 


-79.00 


-79.06 


-79.11 


-79.17 


—79.22 


-79.28 


-79.33 


-79.39 


III 


79-44 


79-50 


79-56 


79.61 


79-67 


79-72 


79-78 


79-83 


79.89 


79-94 


112 


80.00 


80.06 


80.11 


80.17 


80.22 


80.28 


80.33 


80.39 


80.44 


80.50 


"3 


80.56 


80.61 


80.67 


80.72 


80.78 


80.83 


80.89 


80.94 


81.00 


81.06 


114 


81. II 


81.17 


81.22 


81.28 


81-33 


81.39 


81.44 


81.50 


81.56 


81.61 


-115 


-81.67 


-81.72 


-81.78 


-81.83 


-81.89 


-81.94 


-82.00 


-82.06 


-82.11 


-82.17 


116 


82.22 


82.28 


82.33 


82.39 


82.44 


82.50 


82.56 


82.61 


82.67 


82.72 


117 


82.78 


82.83 


82.89 


82.94 


83.00 


83.06 


8s-ii 


83-17 


83.22 


83.28 


118 


83-33 


83-39 


83.44 


83-50 


83.56 


83.61 


83.67 


83.72 


83-78 


83-83 


119 


83-89 


83-94 


84.00 


84.06 


84.11 


84.17 


84.22 


84.28 


84-33 


84-39 


-120 


-84-44 


-84.50 


-84.56 


-84.61 


-84.67 


-84.72 


-84.78 


-84.83 


-84.89 


-84.94 




.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 



SMiTHSONfAN Tables. 



Table 3. 



CENTIGRADE SCALE TO FAHRENHEIT. 



Centi- 
grade. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 






F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 




+60° 


+ i4o?oo 


+ I40?i8 


+ i4o?36 


+i40°54 


+ i4o."72 


+ i4o.°90 


+ i4ifo8 


+ I4i?26 


+ I4i.°44 


+i4i°62 




59 


138.20 


138.38 


138-56 


138-74 


138.92 


139.10 


139.28 


139.46 


139.64 


139.82 




58 


136.40 


136.58 


136.76 


136.94 


137.12 


137-30 


137-48 


137.66 


137-84 


138.02 




57 


134.60 


134-78 


134.96 


135-14 


135-32 


135-50 


135-68 


135.86 


136.04 


136.22 




56 


132.80 


132-98 


133-16 


133-34 


133.52 


133-70 


133-88 


134.06 


134.24 


134-42 




+55 


+ 131.00 


+ 131-18 


+ 131.36 


+131-54 


+131.72 


+ 131.90 


+132.08 


+132.26 


+132.44 


+132.62 




54 


129.20 


129.38 


129.56 


129.74 


129.92 


130.10 


130.28 


130.46 


130.64 


130.82 




53 


127.40 


127.58 


127.76 


127.94 


128.12 


128.30 


128.48 


128.66 


128.84 


129.02 




52 


125.60 


125.78 


125.96 


126.14 


126.32 


126.50 


126.68 


126.86 


127.04 


127.22 




51 


123.80 


123.98 


124.16 


124.34 


124.52 


124.70 


124.88 


125.06 


125.24 


125.42 




+50 


+ 122.00 


+ 122.18 


+ 122.36 


+ 122.54 


+ 122.72 


+ 122.90 


+ 123.08 


+123.26 


+ 123.44 


+123.62 




49 


120.20 


120.38 


120.56 


120.74 


120.92 


121. 10 


121.28 


121.46 


121.64 


121.82 




48 


118.40 


118.58 


118.76 


118.94 


119. 12 


119.30 


119.48 


119.66 


119.84 


120.02 




47 


116.60 


116.78 


116.96 


117. 14 


117.32 


117.50 


117.68 


117.86 


118.04 


118.22 




46 


114.80 


114.98 


115-16 


115-34 


"5-52 


115.70 


115.88 


116.06 


116.24 


116.42 




+45 


+ 113.00 


+113.18 


+ 113.36 


+ 113-54 


+113.72 


+ 113.90 


+ 114.08 


+ 114.26 


+ 114.44 


+ 114.62 




44 


1 1 1. 20 


111-38 


III. 56 


III. 74 


III. 92 


112. 10 


112.28 


112.46 


112.64 


112.82 




43 


109.40 


109.58 


109.76 


109.94 


no. 12 


110.30 


110.48 


110.66 


110.84 


111.02 




42 


107.60 


107.78 


107.96 


108.14 


108.32 


108.50 


108.68 


108.86 


109.04 


109.22 




41 


105.80 


105.98 


106.16 


106.34 


106.52 


106.70 


106.88 


107.06 


107.24 


107.42 




+40 


+ 104.00 


+ 104.18 


+ 104.36 


+ 104.54 


+104.72 


+ 104.90 


+ 105.08 


+105.26 


+105.44 


+105 62 




39 


102.20 


102.38 


102.56 


102.74 


102.92 


103.10 


103.28 


103.46 


103.64 


103.82 




38 


100.40 


100.58 


100.76 


100.94 


IOI.I2 


101.30 


101.48 


101.66 


101.84 


102.02 




37 


98.60 98.78 


98.96 


99.14 


9932 


99-50 


99.68 


99.86 


100.04 


100.22 




36 


96.80^ 96.98 


97.16 


97-34 


97-52 


97.70 


97.88 


98.06 


98.24 


98.42 




+35 


+ 95.00+ 95.18 


+ '95-36 


+ 95-54 


+ 95-72 


+ 95-90 


+ 96.08 


+ 96.26 


+ 96.44 


+ 96.62 




34 


93.20 


93-38 


93-56 


93-74 


93-92 


04.10 


94.28 


94-46 


94.64 


94.82 




33 


91.40 


9i.t;8 


91.76 


91.94 


92.12 


92.30 


92.48 


92.66 


02.84 


93.02 




32 


89.60 


89.78 


89.96 


90.14 


90.32 


90.50 


90.68 


90.86 


91.04 


91.22 




31 


87.80 


87.98 


88.16 


88.34 


88.52 


88.70 


88.88 


89.06 


89.24 


89.42 




+30 


+ 86.00 


+ 86.18 


+ 86.36 


+ 86.54 


+ 86.72 


+ 86.90 


+ 87.08 


+ 87.26 


+ 87.44 


+ 87.62 




29 


84.20 


84.38 


84-56 


84-74 


84.92 


85.10 


85.28 


85.46 


85.64 


85.82 




28 


82.40 


82.58 


82.76 


82.94 


83.12 


83-30 


83.48 


83.66 


83.84 


84.02 




27 


80.60 


80.78 


80.96 


81.14 


81.32 


81.50 


81.68 


81.86 


82.04 


82.22 




26 


78.80 


78.98 


79.16 


79-34 


79-52 


79-70 


79.88 


80.06 


80.24 


80.42 




+25 


+ 77-00 


+ 77-18 


+ 77-36 


+ 77-54 


+ 77-72 


+ 77-90 


+ 78.08 


+ 78.26 


+ 78.44 


+ 78.62 




24 


75.20 


75-38 


75-56 


75-74 


75-92 


76.10 


76.28 


76.46 


76.64 


76.82 




23 


7340 


73-58 


73-76 


73-94 


74.12 


74-30 


74.48 


74.66 


74.84 


75.02 




22 


71.60 


71.78 


71.96 


72.14 


72.32 


72-50 


72.68 


72.86 


73.04 


73.22 




21 


69.80 


69.98 


70.16 


70.34 


70.52 


70.70 


70.88 


71.06 


71.24 


71.42 




+20 


+ 68.00 


+ 68.18 


+ 68.36 


+ 68.54 


+ 68.72 


+ 68.90 


+ 69.08 


+ 69.26 


+ 69.44 


+ 69.62 




19 


66.20 


66.38 


66.56 


66.74 


66.92 


67.10 


67.28 


67.46 


67.64 


67.82 




18 


64.40 


64.58 


64-76 


64.94 


65.12 


65-30 


65.48 


65.66 


65.84 


66.02 




17 


62.60 


62.78 


62.96 


63.14 


63-32 


63-50 


63.68 


63.86 


64.04 


64.22 




16 


60.80 


60.98 


61.16 


61.34 


61.52 


61.70 


61.88 


62.06 


62.24 


62.42 




+ 15 


+ 59-00 


+ 59-18 


+ 5936 


+ 59-54 


+ 59-72 


+ 59-90 


+ 60.08 


+ 60.26 


+ 60.44 


4- 60.62 




14 


57.20 


57-38 


57-56 


57-74 


57-92 


58.10 


58.28 


58.46 


58.64 


58.82 




13 


55-40 


55-58 


55-76 


55-94 


56.12 


56.30 


56.48 


56.66 


56.84 


57.02 




12 


53-6o 


53-78 


53-96 


54-14 


54-32 


54-50 


54-68 


54.86 


55.04 


55.22 




II 


51.80 


51.98 


52.16 


52.34 


52.52 


52.70 


52.88 


53.06 


53.24 


53-42 




+ 10 


+ 50.00 


+ 50.18 


+ 50.36 


+ 50.54 


+ 50.72 


+ 50.90 


+ 51.08 


+ 51.26 


+ 51-44 


+ 51-62 






.0 


.1 


.2 


.3 .4 


.5 


.6 


.7 


.8 


.9 


, 



Smithsonian Tables. 



Table 3. 



CENTIGRADE SCALE TO FAHRENHEIT. 



Centi- 
grade. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


^- 1 


+ 10° 


+5o'.oo 


+50° 18 


+5o°36 


+5o°54 


+50° 72 


+50°.90 


+51.08 


+51.26 


+5i°44 


+ 5I°.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 


43.16 


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-bo 


35-78 


35-96 


36.14 


36-32 


36.50 


36.68 


36.86 


37.04 


37.22' 


I 


33-80 


33-98 


34.16 


34-34 


34-52 


34.70 


34.88 


3 5 -06 


35-24 


35-42I 


+ 


32.00 


32.18 


32.36 


32-54 


32-72 


32.90 


33-08 


33-26 


33-44 


33-62 


- 


+32.00 


+31.82 


+31-64 


+31-46 


+31-28 


+31.10 


+30-92 


+30.74 


+30.56 


+30.38 


I 


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 


19.221 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 


+ 13.821 +13-64 +13-46 


+ 13.28 


+ 13.10 


+ 12.92 


+ 12.74 


+ 12.56 


+ 12.38 


II 


12.20 


12.02 11.84 11-66 


11.48 


11.30 


II. 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 6.44j 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 


^7 


+ 1.40 


+ 1.22 + 1.04' + 0.86 


+ 0.68 


+ 0.50 


+ 0.32 


+ 0.14 


- 0.04 


- 0.22 


i8 


- 0.40 


- 0.58 - 0.76 - 0.94 


- 1. 12 


- 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 


- 4.00 


- 4.18 - 4-36 - 4-54 


- 4.72 


- 4-90 


- 5.08 


- 5-26 


- 5.44 


- 5-62 


21 


5-8o 


5.98 6.16 6.34 


6.52 


6.70 


6.88 


7.06 


7.24 


7-42 


! 22 


7.60 


7-78 


7.9b 8.14 


8.32 


8.50 


8.68 


8.86 


9.04 


9-22, 


1 23 


9.40 


9-58 


9-761 9.94 


10.12 


10.30 


10.48 


10.66 


10.84 


11.02, 


24 


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: 


-30 


-22.00 


-22.18 


-22.36 


-22.54 


-22.72 


-22.90 


-23-08 


-23.26 


-23.44 


-23.62 


31 


23.80 


23-98 


24.16: 24.34 


24-52 


24.70 


24.88 


25.06 


25.24 


25.42 


32 


25.60 


25-78 


25.96 


26.14 


26.32 


26.50 


26.68 


26.86 


27.04 


27.22, 


' 33 


27.40 


27.58 


27.76 


27-94 


28.12 


28.30 


28.48 


28.66 


28.84 


29.02 


34 


29.20 


29-38 


29-56 


29.74 


29.92 


30.10 


30.28 


30.46 


30.64 


3o.82| 


-35 


-31.00 


-31.18 


-31-36 


-31-54 


-31-72 


-31.90 


-32.08 


-32.26 


-32-44 


-32.62 


36 


32.80 


32.98 


33-i6 


33-34 


33-52 


33-70 


33-88 


34-06 


34-24 


34-42 


37 


34.60 


34-78 


34.96, 35.14 


35-32 


35-50 


35-68 


35-86 


36.04 


36.22 


38 


36.40 


36-58 


36.76, 36.94 


37.12 


37-30 


37.48 


37.66 


37.84 


38.02 


39 


38.20 


38.38 


38.56 


38-74 


38.92 


39.10 


39-28 


39.46 


39.64 


39.82 


-40 


—40.00 


-40.18 


-40.36 


-40-54 


-40.72 


—40.90 


—41.08 


-41.26 


-41.44 


-41.62 




.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 



Smithsonian Tables. 
7 



II 



Table 3. 



CENTIGRADE SCALE TO FAHRENHEIT. 



Centi- 
grade. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 1 


-40° 


- 40°.oo 


- 40°. 1 8 


- 40°.36 


- 40.54 


- 40°. 7 2 


- 40.9c 


- 41.08 


- 4f.26 


- 4144 


- 4i°62 


41 


41.80 


41-98 


42.16 


42.34 


42.52 


42.70 


42.88 


43.06 


43-24 


43-42 


42 


43.60 


43-78 


1 43-96 


44-14 


44-32 


44-50 


44.68 


44.86 


45-04 


45-22 


43 


4540 


45-58 


45-76 


45-94 


46.12 


46.30 


46.48 


46.66 


46.84 


47-02 


44 


47.20 


47-38 


47-56 


47-74 


47-92 


48.10 


48.28 


48.46 


48.64 


48.82 


-45 


- 49.00 


- 49.18 


- 49-36 


- 49-54 


- 49.72 


- 49.90 


- 50.08 


- 50.26 


- 50.44 


- 50.62 


46 


50.80 


50.98 


51.16 


51-34 


51-52 


51-70 


51-88 


52.06 


52.24 


52.42, 


47 


52.60 


52.78 


52.96 


53-14 


53-32 


53-50 


53-68 


53-86 


54-04 


54-22 


48 


54-40 


54-58 


54-76 


54-94 


55-12 


55-30 


55-48 


55.66 


55-84 


56.02 


49 


.56.20 


56.38 


56.56 


56.74 


56.92 


57-10 


57-28 


57.46 


57.64 


57-82 


-50 


- 58.00 


- 58.18 


- 58.36 


- 58.54 


- 58.72 


- 58.90 


- 59-o8 


- 59. 26 


- 59-44 


-59.62 


51 


59-8o 


59-98 


60.16 


60.34 


60.52 


60.70 


60.88 


61.06 


61.24 


61.42 


52 


61.60 


61.78 


61.96 


62.14 


62.32 


62.50 


62.68 


62.86 


63.04 


63.22 


53 


63.40 


63-58 


63.76 


63-94 


64.12 


64.30 


64.48 


64.66 


64.84 


65.02 


54 


65.20 


65.38 


65-56 


65-74 


65.92 


66.10 


66.28 


66.46 


66.64 


66.82 


-55 


- 67.00 


- 67.18 


- 67.36 


- 67.54 


- 67.72 


- 67.90 


- 68.08 


- 68.26 


- 68.44 


- 68.62 


56 


68.80 


68.98 


69.16 


69-34 


69.52 


69.70 


69.88 


70.06 


70.24 


70.42 


57 


70.60 


70.78 


70.96 


71.14 


71.32 


71-50 


71.68 


71.86 


72.04 


72.22 


58 


72.40 


72.58 


72.76 


72.94 


73-12 


73-30 


73-48 


73-66 


73-84 


74-02 


59 


74.20 


74-38 


74-56 


74-74 


74-92 


75-IO 


75.28 


75-46 


75-64 


75-82 


-60 


- 76.00 


- 76.18 


- 76.36 


- 76.54 


- 76.72 


- 76.Q0 


- 77-o8 


- 77.26 


- 77-44 


- 77-62 


61 


77.80 


77.98 


78.16 


78.34 


78.52 


78.70 


78.88 


79.06 


79-24 


79.42 


62 


79.60 


79-78 


79.96 


80.14 


80.32 


80.50 


80.6S 


80.86 


81.04 


81.22 


63 


81.40 


81.58 


81.76 


81.94 


82.12 


82.30 


82.48 


82.66 


82.84 


83.02 


64 


83.20 


83-38 


83-56 


83-74 


83.92 


84.10 


84.28 


84.46 


84.64 


84.82 


-65 


- 85.00 


- 85.18 


- 85.36 


- 85.54 


- 85.72 


- 85.90 


- 86.08 


- 86.26 


- 86.44 


- 86.62 


66 


86.80 


86.98 


87.16 


87-34 


87-52 


87-70 


87.88 


88.06 


88.24 


88.42 


67 


88.60 


88.78 


88.96 


89.14 


89.32 


89.50 


89.68 


89.86 


90.04 


90.22 


68 


90.40 


90.58 


90.76 


90.94 


91.12 


91.30 


91.48 


91.66 


91.84 


92.02 


69 


92.20 


92.38 


92.56 


92.74 


92.92 


93.10 


93-28 


93-46 


93-64 


93.82 


-70 


- 94.00 


- 94.18 


- 94-36 


- 94-54 


- 94-72 


- 94.90 


- 95.08 


- 95-26 


- 95-44 


- 95.62 


71 


95.80 


95-98 


96.16 


96-34 


96.52 


96.70 


96.88 


97.06 


97.24 


97.42 


72 


97.60 


97.78 


97.96 


98.14 


9S.32 


98.50 


98.6S 


98.86 


99.04 


99.22 


73 


99.40 


99-58 


99.76 


99.94 


100.12 


100.30 


100.48 


100.66 


100.84 


101.02 


74 


101.20 


101.38 


101.56 


101.74 


101.92 


102.10 


102.28 


102.46 


102.64 


102.82 


-75 


-103.00 


-103.18 


-103.36 


-103.54 


-103.72 


-103.90 


-104.08 


—104.26 


-104.44 


-104.62 


76 


104.80 


104.98 


105.16 


105.34 


105.52 


105.70 


105.88 


106.06 


106.24 


106.42 


77 


106.60 


106.78 


106.96 


107.14 


107.32 


107.50 


107.68 


107.86 


108.04 


108.22 


78 


108.40 


108.58 


108.76 


108.94 


109.12 


109.30 


109.48 


109.66 


109.84 


110.02 


79 


110.20 


110.38 


110.56 


110.74 


110.92 


111.10 


111.28 


111.46 


111.64 


III.82 


-80 


-112.00 


-112. 18 


-112.36 


-112.54 


-112.72 


-112.90 


-113.08 


-113.26 


-113-44 


-113.62 


81 


113.80 


113.98 


114.16 


114-34 


114.52 


114.70 


114.88 


115.06 


115-24 


115.42 


82 


115.60 


115.78 


115.96 


116. 14 


116.32 


116.50 


116.68 


116.86 


117.04 


117.22 


! 83 


117.40 


117.58 


117.76 


117.94 


118.12 


118.30 


118.48 


118.66 


118.84 


119.02 


84 


119.20 


119.38 


119.56 


119.74 


119.92 


120.10 


120.28 


120.46 


120.64 


120.82 


-85 


-121.00 


-121. 18 


-121.36 


-121.54 


-121.72 


-121.90 


-122.08 


-122.26 


-132.44 


-122.62 


86 


122.80 


122.98 


123.16 


123.34 


123-52 


123.70 


123.88 


124.06 


124.24 


124.42 


87 


124.60 


124.78 


124.96 


125.14 


125-32 


125-50 


125.68 


125.86 


126.04 


126.22 


88 


126.40 


126.58 


126.76 


126.94 


127.12 


127.30 


127.48 


127.66 


127.84 


128.02 


89 


128.20 


128.38 


128.56 


128.74 


128.92 


129.10 


129. 28 


129.46 


129.64 


129.82 


-90 


— 130.00 


-130.18 


-130.36 


-130.54 


-130.72 


-130.90 


-131.08 


-131.26 


-131-44 


-131.62 




.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 





Smithsonian Tables. 



12 



Table *. 
CENTIGRADE SCALE TO FAHRENHEIT- Near the Boiling Point. 



Centi- 
grade. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


100° 


2I2?00 


2I2?l8 


2I2?36 


2I2?54 


2I2?72 


2I2?90 


2i3?o8 


2I3?26 


2i3?44 


2I3?62 


99 
98 

97 
96 


210.20 
208.40 
206.60 
204.80 


210.38 
208.58 
206.78 
204.98 


210.56 
208.76 

206.96 
205.16 


210.74 
20S.94 

207.14 
205.34 


210.92 
209.12 
207.32 
205.52 


211. 10 
209.30 
207.50 
205.70 


211.28 
209.48 
207. 68 
205.88 


211.46 
209.66 
207.86 
206.06 


211.64 
209.84 
208.04 
206.24 


211.82 

210.02 
208.22 
206.42 


95 

94 


203.00 
201.20 


203.18 
201.38 


203.36 
201.56 


203.54 
201.74 


203.72 
201.92 


203.90 
202.10 


204.08 
202.28 


204.26 
202.46 


204.44 
202.64 


204.62 
202.82 


93 
92 

91 


199.40 
197.60 
195.80 


199-58 
197.78 
195-98 


199.76 
197.96 

196.16 


199.94 

198.14 

196.34 


200.12 
I9S.32 
196.52 


200.30 
198.50 
196.70 


200.48 
198.68 
196.8S 


200.66 
I98.S6 
197.06 


200.84 
199.04 
197.24 


201.02 
199.22 

197.42 


90 


194.00 


194.18 


194-36 


194-54 


194.72 


194.90 


195.08 


195.26 


195-44 


195.62 



Table 
DIFFERENCES FAHRENHEIT TO DIFFERENCES CENTIGRADE. 



Fahren- 
heit. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


0° 


o?oo 


o?o6 


o?ii 


o?i7 


0?22 


o?28 


o?33 


o°39 


of44 


o?50 


I 


0.56 


0.61 


0.67 


0.72 


0.78 


0.83 


0.89 


0.94 


1. 00 


1.06 


2 


I. II 


1. 17 


1.22 


1.28 


1-33 


1-39 


1.44 


1.50 


1-56 


i.6t 


3 


1.67 


1.72 


1.78 


1-83 


1.89 


1-94 


2.00 


2.06 


2. II 


2.17 


4 


2.22 


2.28 


2.33 


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 


3.17 


3.22 


3.28 


6 


3-33 


3-39 


3-44 


3-50 


3-56 


3-61 


3-67 


3-72 


3-78 


3-83 


7 


3-S9 


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 


5-II 


5-17 


5.22 


5-28 


5.33 


5-39 


5-44 


5.50 


10 


5.56 


5-61 


5-67 


5-72 


5-7S 


5-83 


5.89 


5-94 


6.00 


6.06 


II 


6.11 


6.17 


6.22 


6.28 


6.33 


6-39 


6.44 


6.50 


6.56 


6.61 


12 


6.67 


6.72 


6.78 


6.83 


6.89 


6.94 


7.00 


7.06 


7.11 


7.17 


13 


7.22 


7.28 


7-33 


7.39 


7-44 


7.50 


7.56 


7.61 


7-67 


7-72 


14 


7.78 


7-83 


7.89 


7.94 


8.00 


8.06 


8.11 


8.17 


8.22 


8.28 


15 


8.,S3 


8.39 


8.44 


8.50 


8.56 


8.61 


8.67 


8.72 


8.78 


8.83 


16 


8.89 


8.94 


9.00 


9.06 


9.11 


9.17 


9.22 


9.28 


9-33 


9-39 


17 


9.44 


9-50 


9.56 


9.61 


9-67 


9.72 


9.78 


9-83 


9.89 


9-94 


18 


10.00 


10.06 


10. II 


10.17 


10.22 


10.28 


10.33 


10.39 


10.44 


10.50 


19 


10.56 


10.61 


10.67 


10.72 


10.78 


10.83 


10.89 


10.94 


11.00 


11.06 


20 


II. II 


II. 17 


11.22 


11.28 


11-33 


11.39 


11.44 


11.50 


11.56 


II. 61 



DIFFERENCES CENTIGRADE TO DIFFERENCES 



Table 
FAHRENHEIT. 



Centi- 
grade. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


9 




F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


0° 


o?oo 


o?i8 


o?36 


o?54 


o?72 


o?90 


i?o8 


I?26 


1-44 


I?62 


I 


1.80 


1.98 


2.16 


2-34 


2.52 


2.70 


2.88 


3.06 


3.24 


3.42 


2 


3.60 


3.78 


3-96 


4.14 


4.32 


4-50 


4.68 


4.86 


5.04 


5.22 


3 


5-40 


.5-58 


5-76 


5-94 


6.12 


6.30 


6.48 


6.66 


6.84 


7.02 


4 


7.20 


7-38 


7.56 


7-74 


7.92 


8.10 


8.28 


8.46 


8.64 


8.82 


5 


9.00 


9.18 


9-36 


9-54 


9.72 


9.90 


10.08 


10.26 


10.44 


10.62 


6 


10.80 


10.98 


II. 16 


11-34 


11.52 


11.70 


11.88 


12.06 


12.24 


12.42 


7 


12.60 


12.7S 


12.96 


13-14 


13-32 


13.50 


13.68 


13.S6 


14.04 


14.22 


8 


14.40 


14.58 


14.76 


14.94 


15.12 


15.30 


15.48 


15-66 


15.84 


16.02 


9 


16.20 


16.38 


16.56 


16.74 


16.92 


17.10 


17.28 


17.46 


17.64 


17.82 



Smithsonian Tables. 



13 



CORRECTION FOR THE TEMPERATURE OF THE EMERGENT 
MERCURIAL COLUMN OF THERMOMETERS. 

T = t — 0.0000S6 «(/' — /) — Fahrenheit temperatures. 
T = t - 0.000155 n{l' — t) — Centigrade temperatures. 
T = Corrected temperature. 
t = Observed temperature. 

t' — Mean temperature of the glass stem and emergent mercury column. 
n — Length of mercury in the emergent stem in scale degrees. 

When t' is \ —r f than t the numerical correction is to be \ j-— — '- \ 

lower ) I added. ) 



Table 7. 



CORRECTION FOR FAHRENHEIT THERMOMETERS. 

Values of 0.000086 «(/' — /) 



71 


t' - 1 


10° 


20° 


30° 


40= 


50° 


60° 


70° 


80° 


90° 


100° 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


10° 


OX) I 


o;o2 


0.03 


0.03 


0.04 


0.05 


o'o6 


0.07 


o°o8 


o.°09 


20 


0.02 


0.03 


O.OS 


0.07 


0.09 


O.IO 


0.12 


0.14 


0.15 


0.17 


30 


0.03 


o.os 


0.08 


O.IO 


0.13 


0.15 


0.18 


0.21 


0.23 


0.26 


40 


0.03 


0.07 


O.IO 


0.14 


0.17 


0.21 


0.24 


0.28 


0.31 


0-34 


50 


0.04 


0.09 


0.13 


0.17 


0.22 


0.26 


0.30 


0.34 


0.39 


0.43 


60 


0.05 


O.IO 


O.IS 


0.21 


0.26 


0.31 


0.36 


0.41 


0.46 


0.52 


70 


0.06 


0.12 


0.18 


0.24 


0.30 


0.36 


0.42 


0.48 


0.54 


0.60 


80 


0.07 


0.14 


0.21 


0.28 


0.34 


0.41 


0.48 


0.5 s 


0.62 


0.69 


go 


0.08 


o.is 


0.23 


0.31 


0.30 


0.46 


0.54 


0.62 


0.70 


0.77 


100 


0.09 


0.17 


0.26 


0.34 


0.43 


0.52 


0.60 


0.69 


0.77 


0.86 


no 


o.oq 


0.19 


0.28 


0.38 


0.47 


0.57 


0.66 


0.76 


0.8s 


0.9s 


120 


o.io 


0.21 


0.31 


0.41 


0-52 


0.62 


0.72 


0.83 


0-93 


1.03 


130 


0.1 1 


0.22 


0.34 


0.45 


0.56 


0.67 


0.78 


0.90 


I.OI 


1. 12 





Table 8. 



CORRECTION FOR CENTIGRADE THERMOMETERS. 

Values of 0.000155 «(^' — 



n 








t' - I 




— 






10° 


20° 


30° 


40° 


50° 


60° 


70° 


80° 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


10^ 


0.02 


0.03 


o!os 


o°o6 


o!o8 


0.09 


O.II 


0?I2 


20 


0.03 


0.06 


0.09 


0.12 


0.16 


0.19 


0.22 


0.25 


30 


0.05 


0.09 


0.14 


0.19 


0.23 


0.28 


0-33 


0.37 


40 


0.06 


0.12 


0.19 


0-25 


0.31 


OvV 


0-43 


0.50 


s° 


0.08 


0.16 


0.23 


0.31 


O-30 


0.46 


O.S4 


0.62 


60 


O.OQ 


O.IQ 


0.28 


0.37 


0.46 


0.56 


0.65 


0.74 


70 


O.II 


0.22 


0-3-3 


0.43 


0.54 


0.65 


0.76 


0.87 


80 


0.12 


0.25 


0.37 


0.50 


0.62 


0.74 


0.87 


0.99 


90 


0.14 


0.28 


0.42 


0.56 


0.70 


0.84 


0.98 


1. 12 


100 


0.16 


0.31 


0.46 


0.62 


0.78 


0.93 


1.08 


1.24 



Smithsonian Tables. 



14 



CONVERSIONS INVOLVING LINEAR MEASURES. 



Inches into millimeters Table 9 

Millimeters into inches Table 10 

Barometric inches (mercury) into millibars Table ii 

Barometric millimeters (mercury) into millibars Table 12 

Feet into meters Table 13 

Meters into feet Table 14 

Miles into kilometers Table 15 

Kilometers into miles Table 16 

Interconversion of nautical and statute miles Table 17 

Continental measures of length with their metric and English 

equivalents Table 18 



Table 9. 



INCHES INTO MILLIMETERS. 

I inch = 25.40005 mm. 



Inches. 


.00 


.0! 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 




mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0.00 


0.00 


0.25 


0.51 


0.76 


1.02 


1.27 


1-52 


1.78 


2.03 


2.29 


0.10 


2.54 


2.79 


3-05 


3-30 


3-56 


3-81 


4.06 


4-32 


4-57 


4-83 


0.20 


5-o8 


5-33 


5-59 


5-84 


6.10 


6.35 


6.60 


6.86 


7.1 1 


7-37 


0.30 


7.62 


7.87 


8.13 


8.38 


8.64 


8.89 


9.14 


9-40 


9-65 


9.91 


0.40 


10.16 


10.41 


10.67 


10.92 


11.18 


11-43 


11.68 


11.94 


12.19 


12.45 


0.50 


12.70 


12.95 


13.21 


13.46 


13.72 


13-97 


14.22 


14.4S 


14-73 


14.99 


o.bo 


15-24 


15-49 


15-75 


16.00 


16.26 


16.51 


16.76 


17.02 


17.27 


17-53 


0.70 


17.78 


18.03 


18.29 


18.54 


18.80 


19-05 


19.30 


19-56 


19.81 


20.07 


0.80 


20.32 


20.57 


20.S3 


21.08 


21.34 


21.59 


21.84 


22.10 


22.35 


22.61 


0.90 


22.86 


23.11 


23-37 


23.62 


23.88 


24-13 


24-38 


24.64 


24.89 


25-15 


1.00 


25.40 


25-65 


25-91 


26.16 


26.42 


26.67 


26.92 


27.18 


27-43 


27.69 


1. 10 


27.94 


28.19 


28.45 


28.70 


28.96 


29.21 


29.46 


29.72 


29.97 


30.23 


1.20 


30.48 


30-73 


30.99 


31-24 


31-50 


31-75 


32.00 


32.26 


32.51 


32.77 


1.30 


33-02 


33-27 


33-53 


33-78 


34-04 


34-29 


34-54 


34.80 


35-05 


35.31 


1.40 


35-56 


35-81 


36.07 


36.32 


36-58 


36.83 


37.08 


37-34 


37-59 


37.85 


1.50 


3S.10 


38.35 


38.61 


38.86 


39.12 


39-37 


39.62 


39-88 


40.13 


40.39 


1.60 


40.64 


40.89 


41-15 


41.40 


41.66 


41.91 


42.16 


42.42 


42.67 


42.93 


1.70 


43.18 


43-43 


43-69 


43-94 


44.20 


44-45 


44-70 


44-96 


45-21 


45.47 


1.80 


45-72 


45-97 


46.23 


46.48 


46.74 


46-99 


47-24 


47-50 


47-75 


48.01 


1.90 


48.26 


48.51 


48.77 


49.02 


49-28 


49-53 


49.78 


50.04 


50.29 


50.55 


2.00 


50.80 


51-05 


51-31 


51-56 


51-82 


52.07 


52.32 


52.5S 


52.83 


53.09 


2.10 


53-34 


53-59 


53-85 


54.10 


54-36 


54.61 


54-86 


55-12 


55-37 


55.63 


2.20 


55-88 


56-13 


56.39 


56.64 


56.90 


57-15 


57-40 


57-66 


57-91 


58.17 


2.30 


58.42 


58-67 


58.93 


59-18 


59-44 


59-69 


59-94 


60.20 


60.45 


60.71 


2.40 


60.96 


61.21 


61.47 


61.72 


61.98 


62.23 


62.48 


62.74 


62.99 


63.25 


2.50 


63-50 


63-75 


64.01 


64.26 


64-52 


64.77 


65.02 


65.28 


65-53 


65.79 


2.60 


66.04 


66.29 


66.55 


66.80 


67.06 


67.31 


67-56 


67.82 


68.07 


68.33 


2.70 


68.58 


68.83 


69.09 


69-34 


69.60 


69.85 


70.10 


70.36 


70.61 


70.87 


2.80 


71.12 


71-37 


71-63 


71.88 


72.14 


72.39 


72.64 


72.90 


73-15 


73.41 


2.90 


73.66 


73-91 


74-17 


74-42 


74.68 


74-93 


75-18 


75-44 


75-69 


75.95 


3.00 


76.20 


76.45 


76.71 


76.96 


77.22 


77-47 


77-72 


77-98 


78.23 


78.49 


3.10 


78.74 


78.99 


79-25 


79-50 


79.76 


80.01 


80.26 


80.52 


80.77 


81.03 


3.20 


81.28 


81-53 


81.79 


82.04 


82.30 


82.55 


82.80 


83.06 


83.31 


83.57 


3-30 


83.82 


84.07 


84-33 


84-59 


84.84 


85.09 


85-34 


85.60 


85.85 


86.11 


340 


86.36 


86.61 


86.87 


87.12 


87.38 


87.63 


87.88 


88.14 


88.39 


88.65 


3.50 


88.90 


89-15 


89.41 


89.66 


89.92 


90.17 


90.42 


90.68 


90.93 


91.19 


3.60 


91.44 


91.69 


91-95 


92.20 


92.46 


92.71 


92.96 


93-22 


93.47 


93-73 


3-70 


93-98 


94-23 


94-49 


94-74 


95.00 


95-25 


95-50 


95-76 


96.01 


96-27 


3.80 


96.52 


96.77 


97-03 


97-28 


97-54 


97-79 


98.04 


98.30 


98.55 


98.81 


3-90 


99.06 


99-31 


99-57 


99.82 


100.08 


100.33 


100.58 


100.84 


101.09 


101.35 


4.00 


101.60 


101.85 


102.11 


102.36 


102.62 


102.87 


103.12 


103-38 


103.63 


103.89 


4.10 


104.14 


104-39 


104.65 


104.90 


105.16 


105.41 


105.66 


105.92 


106.17 


106.43 


4.20 


106.68 


106.93 


107.19 


107.44 


107.70 


107.95 


108.20 


108.46 


108.71 


108.97 


4-30 


109.22 


109.47 


109.73 


109.98 


110.24 


110.49 


110.74 


111.00 


111.25 


111.51 


4.40 


111.76 


112.01 


112.27 


112.52 


112.78 


113-03 


113.28 


113-54 


113.79 


114.05 


4.50 


114.30 


114-55 


114.81 


115.06 


115-32 


115-57 


115.82 


116.08 


116.33 


116.59 


4.60 


116.84 


117.09 


117-35 


117.60 


117.86 


118.11 


118.36 


118.62 


118.87 


119.13 


4.70 


119.38 


119.63 


119.89 


120.14 


120.40 


120.65 


120.90 


121.16 


121.41 


121.67 


4.80 


121.92 


122.17 


122.43 


122.68 


122.94 


123.19 


123.44 


123.70 


123.95 


124.21 


4.90 


124.46 


124.71 


124.97 


125.22 


125.48 


125-73 


T25.98 


126.24 


126.49 


126.75 


5.00 


127.00 


127.25 


127.51 


127.76 


128.02 


12S.27 


128.52 


128.78 


129.03 


129.29 


Proport 


ional Part 


s. ^"'^^ 


O.OOI 


0.002 


0.003 0. 


004 0.00 


5 0.006 


0.007 


0.008 c 


.009 






mm. 


0.025 


0.051 c 


).076 0. 


02 0.12 


7 0.152 


0.178 


0.203 


.229 



Smithsonian Table*. 



16 



Table 9. 



INCHES INTO MILLIMETERS. 

I inch = 25.40005 mm. 



Inches. 



5.00 

5-IO 
5.20 

5-30 
540 

5.50 

5.60 
5-70 
5.S0 

5-90 

6.00 

6.10 
6.20 
6.30 
6.40 

6.50 

6.60 
6.70 
6.80 
6.90 

7.00 

7.10 
7.20 
7-30 
7.40 

7.50 

7.60 
7.70 
7.80 
7.90 

8.00 

8.10 
8.20 
8.30 
8.40 

8.50 

8.60 
8.70 
8.80 
8.90 

9.00 

9.10 
9.20 
9-30 
9.40 

9.50 

9.60 
9.70 
9.80 
9.90 

10.00 



.00 



.01 



127.00 

129.54 

132. 68 
134.62 
137.16 

139.70 
142.24 
144.78 
147-32 
149.86 

152.40 
154-94 
157-48 
160.02 
162.56 

165.10 
167.64 
170.18 
172.72 
175.26 

177.80 
180.34 
182.88 
185.42 
187.96 

190.50 
193.04 
195-58 
198.12 
200.66 

203.20 

205.74 
208.28 
210. 82 
213.36 

215.90 
218.44 
220.9S 
223.52 
226.06 

228.60 
231.14 
233-68 
236.22 
238.76 

241.30 
243.84 
246.38 
248.92 
251.46 

254.00 



.02 



127.25 
129.79 
132-33 
134-87 
137-41 

139-95 

142.49 

145-03 
147-57 
150. 1 1 

152.66 
155-19 
157-73 
160.27 
162.81 

165-35 

167.89 

170-43 
172.97 

175-51 

178-05 
180.59 
183.13 
185-67 
188.21 

190-75 
193.29 

195-83 
198-37 
200.91 

203.45 
205.99 
208.53 
211.07 
213.61 

216.15 
218.69 
221.23 
223.77 
226.31 

228.85 
231-39 
233-93 
236.47 
239.01 

241-55 
244.09 
246.63 
249.17 
251.71 

254-25 



.03 



.04 



mm. 
127.51 
130.05 
132-59 
135-13 
137-67 

140.21 
142-75 
145-29 
147-83 
150-37 

152.91 
155-45 
157-99 
160.53 
163.07 

165.61 
168.15 
170.69 
173-23 
175-77 

178.31 
180.85 
183.39 
185.93 
188.47 

191. 01 

193-55 
196.09 

198-63 
201.17 

203.71 
206.25 

208.79 

211-33 
213.87 

216.41 
218.95 
221.49 
224.03 
226.57 

229.11 
231-65 
234-19 
236-73 
239.27 

241.81 

244-35 
246.89 

249-43 
251-97 

254-51 



mm. 
127.76 
130.30 
132.84 
135-38 
137.92 

140.46 
143.00 

145-54 
148.08 
150.62 

153-16 
155-70 
158.24 
160.78 
163-32 

165.86 
168.40 
170.94 
173-48 
176.02 

178-56 
181. 10 
183.64 
186.18 
188.72 

191.26 
193.80 
196.34 
198.88 
201.42 

203.96 
206.50 
209.04 
211.58 
214.12 

216.66 
219.20 
221.74 
224.28 
226.82 

229.36 
231.90 

234.44 
236. 98 
239-52 

242.06 
244.60 
247.14 
249.68 
252.22 

254-76 



.05 



.06 



mm. 
128.02 
130.56 
133-10 

135-64 
138.18 

140.72 
143.26 
145.80 
148.34 
150.88 

153-42 
155-96 
158.50 
161.04 
163-5S 

166.12 
168.66 
171.20 

173-74 
176.28 

17S.82 
181.36 
183.90 
186.44 
188.98 

191-52 
194.06 
196.60 
199.14 
201.68 

204.22 
206.76 
209.30 
211.84 
214.38 

216.92 
219.46 
222.00 
224.54 
227.08 

229.62 
232.16 

234.70 
237.24 
239-78 

242.32 
244.86 
247.40 
249.94 
252.48 

255-02 



mm. 
128.27 
130.81 
133-35 
135-89 
138.43 
140.97 

143-51 
146.05 

148-59 
15I-I3 

153-67 
156.21 

158-75 
161.29 

163-83 

166.37 
168.91 
171-45 
173-99 
176.53 
179.07 
181. 61 

184.15 
186.69 
189.23 

191.77 
194-31 
196-85 

199-39 
201.93 

204.47 
207.01 

209.55 
212.09 
214.63 

217.17 
219.71 
222.25 
224.79 
227.33 

229.87 
232.41 
234-95 
237-49 
240.03 

242.57 
245.11 

247-65 
250-19 
252-73 

255-27 



.07 



mm. 
128.52 
131.06 
133.60 

136-14 
138.68 

141.22 
143-76 
146.30 
148.84 
151-38 

153-92 
156.46 
159.00 
161.54 
164.08 

166.62 
169.16 
171.70 
174.24 
176.78 

179.32 
181.86 
184.40 
186.94 
189.48 

192.02 
194-56 
197.10 

199-64 
202.18 

204.72 
207.26 
209. 80 
212.34 
214.88 

217.42 
219.96 
222.50 
225.04 
227.58 

230.12 
232.66 
235-20 

237.74 
240.28 

242.82 
245-36 
247.90 
250.44 
252.98 

255-52 



.08 



.09 



mm. 
128.78 
131-32 
133-86 
136.40 
138-94 

141.48 
144.02 
146.56 
149.10 
151-64 

154-18 
156.72 
159-26 
161.80 
164-34 

166.88 
169.42 
171.96 
174-50 
177-04 

179-58 
182.12 
184.66 
187.20 
189.74 

192.28 
194.82 
197.36 
199.90 
202.44 

204.98 
207.52 
210.06 
?I2.6o 

215-14 
217.68 

220.22 
222.76 

225.30 

227.84 
2.30.38 

232.92 
235-46 

238.00 

240-54 

243-08 
245.62 
248.16 
250.70 
253-24 
255-78 



129.03 
131-57 
134-11 
136-65 
139-19 

141-73 
144-27 
146.81 

149-35 
151-89 

154-43 
156.97 
159-51 

162.05 

164-59 
167.13 

169.67 
172.21 

174-75 
177.29 

179-83 
182.37 
184.91 

187.45 
189-99 

192-53 
195-07 
197-61 

200.15 
202.69 

205.23 

207.77 
210.31 

212.85 
215-39 
217.93 

220.47 
223.01 

225.55 

228.09 

230.63 
233.17 
235.71 
238.25 

240-79 

243-33 
245-87 

248.41 
250-95 

253-49 
256.03 



129.29 

131-83 
134-37 
136.91 

139.45 
141.99 
144.53 
147.07 
149.61 

152.15 

154-69 
157-23 
159-77 
162.31 
164-85 

167.39 
169.93 
172.47 
175.01 

177-55 
180.09 
182.63 
185.17 
187.71 
190.25 

192.79 

195.33 
197.87 
200.41 
202.95 

205.49 
208.03 
210.57 
213-11 
215-65 

218.19 
220.73 
223.27 
225.81 
228.35 

230.89 
233-43 
235-97 
238-51 
241-05 

243.59 
246.13 
248.67 
251.21 
253.75 
256.29 



Proportional Parts. 



Inch, 
mm. 



O.OOI 

0.025 



0.002 
0.051 



0.003 
0.076 



0.004 
0.102 



0.005 
0.127 



0.006 
0.152 



0.007 
0.178 



0.008 
0.203 



0.009 
0.229 



Smithsonian Tables- 



17 



Tabue 9. 



INCHES INTO MILLIMETERS. 

I inch = 25.40005 mm. 



Inches. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 




mm. 


mm. 


ram. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


10.00 


254.00 


254-25 


254.51 


254-76 


255.02 


255-27 


255-52 


255.78 


256.03 


256.29 


10.10 


256.54 


256.79 


257.05 


257-30 


257.56 


257-81 


258.06 


258.32 


258.57 


258.83 


10.20 


259-08 


259-33 


259.59 


259-84 


260. 10 


260.35 


260.60 


260.86 


261. II 


261.37 


10.30 


261.62 


261.87 


262. 1- 
264.6^ 


262.38 


262.64 


262.89 


263.14 


263.40 


263.65 


263.91 


10.40 


264. 16 


264.41 


264.92 


265.18 


265.43 


265.68 


265.94 


266.19 


266.45 


10.50 


266.70 


266.95 


267.21 


267.46 


267.72 


267.97 


268.22 


268.48 


268.73 


268.99 


10.60 


269 24 


269.49 


269.75 


270.00 


270.26 


270.51 


270.76 


271.02 


271.27 


271-53 


10.70 


271.78 


272.03 


272.29 


272-54 


272.80 


273-05 


273.30 


273.56 


273-81 


274-07 


10.80 


274-32 


274-57 


274.93 


275.08 


275.34 


275-59 


275.84 


276.10 


276.35 


276.61 


10.90 


276.86 


277.11 


277-37 


277.62 


277.88 


278.13 


278.38 


278.64 


278.89 


279-15 


11.00 


279.40 


279.65 


279.91 


280.16 


280.42 


280.67 


280. 92 


281.18 


281.43 


281.69 


II. IG 


2S1.94 


282.19 


282.45 


2S2.70 


2S2.96 


283.21 


283.46 


283.72 


283.97 


284-23 


11.20 


284.48 


284.73 


284.99 


285.24 


285.50 


285.75 


286.00 


286.26 


286.51 


286.77 


11.30 


287.02 


287.27 


287-53 


287.78 


288.04 


288.29 


288.54 


288.80 


289.05 


289.31 


11.40 


289.56 


289.81 


290.07 


290.32 


290.58 


290.83 


291.08 


291-34 


291-59 


291.85 


11.50 


292.10 


292.35 


292.61 


292. 86 


293.12 


293.37 


293.62 


293.88 


294-13 


294-39 


11.60 


294.64 


294.89 


295-15 


295.40 


295.66 


295.91 


296.16 


296.42 


296.67 


296-93 


11.70 


297.18 


297-43 


297.69 


297.94 


298.20 


298.45 


29S.70 


298.96 


299.21 


299-47 1 


11.80 


299.72 


299-97 


300.23 


300.48 


300.74 


300.99 


301.24 


301.50 


301-75 


302.01 i 


11.90 


302.26 


302.51 


302.77 


303-02 


303.28 


303.53 


303.78 


304.04 


304.29 


304-55 


12.00 


304.80 


305-05 


305-31 


305-56 


305.82 


306.07 


306.32 


306.58 


306.83 


307.09 


12.10 


307-34 


307-59 


307-85 


308. 10 


308.36 


308.61 


30S.86 


309.12 


309-37 


309-63 


12.20 


309.88 


310.13 


3^0.39 


310.64 


310.90 


311-15 


311.40 


311.66 


311. 91 


312.17 


12.30 


312.42 


312.67 


312.93 


313-18 


313.44 


313-69 


313.94 


314.20 


314-45 


314-71 


12.40 


314-96 


315-21 


315-47 


315-72 


315.98 


316.23 


316.48 


316.74 


316.99 


317-25 


12.50 


317-50 


317-75 


318.01 


318.26 


318.52 


318.77 


319.02 


319.28 


319-53 


319-79 


12.60 


320.04 


320.29 


320.55 


320.80 


321.06 


321.31 


321-56 


321.82 


322.07 


322.33 


j 12.70 


322.58 


322.83 


323.09 


323-34 


323.60 


323-85 


324.10 


324-36 


324.61 


324-87 


12.80 


325-12 


325-37 


325-63 


325-88 


326.14 


326.39 


326.64 


326.90 


327-15 


327-41 


12.90 


327.66 


327.91 


328,17 


328.42 


328.68 


328.93 


329.18 


329.44 


329-69 


329-95 


1 13.00 


330.20 


330.45 


330.71 


330.96 


331.22 


331-47 


331-72 


331.98 


332-23 


332.49 


13.10 


332.74 


332-99 


333-25 


333.50 


333-76 


334-01 


334-26 


334.52 


334-77 


335.03 


13.20 


335-28 


335-53 


335-79 


336.04 


336.30 


336.55 


336-80 


337.06 


337-31 


337-57 


13-30 


337-82 


338-07 


338-33 


338.58 


338.84 


339-09 


339-34 


339.60 


33985 


340. 1 1 


13.40 


340.36 


340.61 


340.87 


341.12 


341.38 


341.63 


341.88 


342.14 


342.39 


342.65 


13.50 


342.90 


343- 15 


343-41 


343-66 


343-92 


344-17 


344-42 


344. 68 


344-93 


345.19 


13.60 


345-44 


345-69 


345-95 


346. 20 


346.46 


346.71 


346.96 


347.22 


347-47 


347.73 


13.70 


347-98 


34S.23 


348.49 


348.74 


349.00 


349.25 


349-50 


349.76 


350.01 


350.27 


13.80 


350.52 


350.77 


351.03 


351-28 


351.54 


351.79 


352.04 


352.30 


352.55 


352.81 


13.90 


353-06 


353-31 


353.57 


353-82 


354.08 


354-33 


354.58 


354.84 


355.09 


355-35 


14.00 


355-60 


355-85 


356.11 


356.36 


356.62 


356.87 


357.12 


357.38 


357.63 


357-89 


14.10 


358.14 


358.39 


358.65 


358.90 


359-16 


359.41 


359-66 


359-92 


360.17 


360.43 


14.20 


360.68 


360.93 


361.19 


361.44 


361.70 


361.95 


362.20 


362.46 


362.71 


362.97 


14.30 


363.22 


363-47 


363-73 


363-98 


364.24 


364-49 


364-74 


365.00 


365.25 


365-51 I 


14.40 


365-76 


366.01 


366.27 


366.52 


366.78 


367.03 


367.28 


367-54 


367.79 


368.05 1 


14.50 


368.30 


368.55 


368.81 


369.06 


369-32 


369-57 


369.82 


370.08 


370.33 


370.59 


14.60 


370.84 


371.09 


371-35 


371.60 


371.86 


372.11 


372.36 


372.62 


372.87 


373-13 


14.70 


373-38 


373-63 


373-89 


374-14 


374-40 


374-65 


374.90 


375.16 


375-41 


375-67 


14.80 


375.92 


376.17 


376.43 


376.68 


376.94 


377.19 


377.44 


377.70 


377-95 


378.21 


14.90 


378.46 


378.71 


378.97 


379.22 


379-48 


379-73 


379-98 


380.24 


380.49 


380.75 


15.00 


3S1.00 


381.25 


381.51 


381.76 


382.02 


382.27 


382.52 


382.78 


383-03 


383-29 


Propo 


.. 1 p t Inch, o.ooi 0.002 0.003 0.004 0.005 0.006 0.007 


0.008 0.009 




mm. 0.025 0051 0.076 0.102 0.127 0.152 0.178 


0.203 0.229 



Bmithsonian Table*. 



INCHES INTO MILLIMETERS. 

I inch = 25.40005 mm. 



Table 9. 



Inches. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 




turn. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


15.00 


3S1.OO 


381-25 


381.51 


381-76 


3S2.02 


382.27 


382.52 


382.78 


383-03 


383-29 1 


15.10 


383-54 


3S3-79 


384-05 


384-30 


384.56 


384-81 


385-06 


385-32 


385-57 


385-83 


15.20 


386.08 


386.33 


386.59 


386.84 


387.10 


387-35 


387.60 


387-86 


388.11 


388.37 


15-30 


388.62 


388.87 


389-13 


389-38 


389.64 


389-89 


390- 14 


390-40 


390.65 


390.91 


15.40 


391.16 


391-41 


391.67 


391.92 


392.18 


392.43 


392-68 


392.94 


393-19 


393-45 


15.50 


393-70 


393-95 


394-21 


394-46 


394-72 


394-97 


395-22 


395.48 


395-73 


395-99 


15.60 


396.24 


39-649 


396-75 


397-00 


397.26 


397-5^ 


397-76 


398.02 


398-27 


398-53 


15-70 


39S-78 


399-03 


399-29 


399-54 


399-80 


400.05 


400.30 


400.56 


400.81 


401.07 


15.80 


401.32 


401.57 


401.83 


402.08 


402.34 


402.59 


402.84 


403.10 


403-35 


403.61 


15-90 


403.86 


404. 1 1 


404-37 


404.62 


404.88 


405-13 


405-38 


405.64 


405-89 


406.15 


16.00 


406.40 


406.65 


406.91 


407.16 


407-52 


407.67 


407.92 


408.18 


408.43 


408.69 


16.10 


408.94 


409.19 


409-45 


409.70 


409. 96 


410.21 


410.46 


410.72 


410.97 


411.23 


16.20 


411.48 


411-73 


411.99 


412.24 


412.50 


412.75 


413.00 


413.26 


413.51 


413-77 


16.30 


414.02 


414-27 


414-53 


414.78 


415-04 


415.29 


415-54 


415.80 


416.05 


416.31 


16.40 


416.56 


416.81 


417.07 


417-32 


417.58 


417.83 


418.08 


418.34 


418.59 


418.85 


16.50 


419.10 


41935 


419.61 


419.86 


420.12 


420.37 


420.62 


420.88 


421.13 


421.39 


16.60 


421.64 


421.89 


422.15 


422.40 


422.66 


422.91 


423.16 


423.42 


423.67 


423.93 


16.70 


424.18 


424-43 


424.69 


424-94 


425-20 


425.45 


425-70 


425-96 


426.21 


426.47 


16.80 


426.72 


426.97 


427.23 


427.48 


427-74 


427-99 


428.24 


428.50 


428.75 


429.01 


16.90 


429.26 


429-51 


429.77 


430-02 


430-28 


430.53 


430-78 


431.04 


431-29 


431-55 


17.00 


431.80 


432-05 


432-31 


432-56 


432.82 


433-07 


43332 


433-58 


433.83 


434.09 


17.10 


434-34 


434-59 


434-85 


435-10 


435-36 


435-61 


435-86 


436.12 


436.37 


436.63 


17.20 


436.88 


437.13 


437.39 


437.64 


437.90 


438.15 


438-40 


438.66 


438.91 


439-17 


17.30 


439-42 


439-67 


439-93 


440.18 


440-44 


440.69 


440.94 


441.20 


441.45 


441.71 


17.40 


441.96 


442.21 


442.47 


442.72 


442.98 


443.23 


443 -48 


443-74 


443.99 


444.25 


17.50 


444-50 


444-75 


445.01 


445-26 


445-52 


445-77 


446.02 


446.28 


446.53 


446.79 


17.60 


447.04 


447-29 


447-55 


447.80 


448.06 


448-31 


448.56 


448.82 


449-07 


449-33 


17.70 


449-58 


449-83 


450-09 


450.34 


450.60 


450.85 


451.10 


451.36 


451.61 


451-87 


17.80 


452.12 


452-37 


452.63 


452-88 


453-14 


453-39 


45364 


453-90 


454-15 


454-41 


17.90 


454-66 


454-91 


455.17 


455-42 


455-68 


455-93 


456.18 


456.44 


456.69 


456.95 


18.00 


457- 20 


457-45 


457.71 


457-96 


458.22 


458.47 


458.72 


458.98 


459-23 


459-49 


18.10 


459-74 


459-99 


460.25 


460.50 


460.76 


461.01 


461.26 


461.52 


461.77 


462.03 


18.20 


462. 28 


462.53 


462.79 


463-04 


463.30 


463-55 


463.80 


464.06 


464.31 


464.57 


18.30 


464. 82 


465-07 


465.33 


465-58 


465.84 


466.09 


466.34 


466.60 


466.85 


467,11 


18.40 


467.36 


467.61 


467-87 


468.12 


468.38 


468.63 


468.88 


469.14 


469-39 


469.35 


18.50 


469.90 


470-15 


470.41 


470.66 


470.92 


471.17 


471.42 


471.68 


471-93 


472.19 


18.60 


472.44 


472-69 


472.95 


473.20 


473-46 


473-71 


473-96 


474.22 


474.47 


474.73 


18.70 


474.98 


475-23 


475-49 


475-74 


476.00 


476.25 


476.50 


476.76 


477.01 


477-27 


18.80 


477-52 


477-77 


478.03 


478.28 


478-54 


478.79 


479.04 


479-30 


479-55 


479-81 


18.90 


480.06 


480.31 


480.57 


480.82 


481.08 


481.33 


481.58 


481.84 


482.09 


482.35 


19.00 


482.60 


482.85 


483.11 


483-36 


483.62 


483.87 


484.12 


484.38 


484-63 


484.89 


19.10 


485-14 


485-39 


485-65 


485-90 


486.16 


486.41 


486.66 


486.92 


487.17 


487.43 


19.20 


487.68 


487-93 


488.19 


488.44 


4S8.70 


488.95 


4S9.20 


4S9.46 


489.71 


489.97 


19.30 


490.22 


490-47 


490.73 


490.98 


491.24 


491.49 


491.74 


492.00 


492.25 


492.51 


19.40 


492-76 


493-OI 


493-27 


493-52 


493-78 


494-03 


494-28 


494-54 


494.79 


495.05 


19.50 


495-30 


495-55 


495-81 


496.06 


496.32 


496-57 


496.82 


497.08 


497.33 


497-59 


19.60 


497.84 


498.09 


498-35 


498.60 


498.86 


499.11 


499.36 


499.62 


499.87 


500.13 


19.70 


500.38 


500.34 


500.89 


501.14 


501.40 


501.65 


501.91 


502.16 


502.41 


502.67 


19.80 


502.92 


503-18 


503-43 


503-68 


503.94 


504.19 


504.45 


504.70 


504-95 


505-21 


19.90 


505-46 


505-72 


505-97 


506.22 


506.48 


506.73 


506.99 


507-24 


507.49 


507.75 


20.00 


508.00 


508.26 


508.51 


508.76 


509.02 


509-27 


509.53 


509-78 


510.03 


510.29 


Propo 


, _ . Inch, o.ooi 0.002 0.003 0.004 0.005 0.006 0.007 0.008 o.ooQ 
rtional Parts. •» .. / 




mm. 0.025 0-051 0.076 0.102 0.127 0.152 0.175 0.203 0.229 



Smithsonian Tables. 



19 



Table 9. 



INCHES INTO MILLIMETERS. 

I inch =r 25.40005 mm. 



Inches. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 .09 




mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. i 


20.00 


508.00 


508.26 


508.51 


508.76 


509.02 


509.27 


509-53 


509.78 


510.03 


510.29 


20.10 


510.54 


510.80 


511.05 


511.30 


511.56 


511.81 


512.07 


512.32 


512.57 


512.83 


20.20 


513-08 


513-34 


513-59 


513.84 


514.10 


514-35 


514.61 


514.86 


515-II 


515.37 


20.30 


515-62 


515-88 


516-13 


516.38 


516.64 


516.89 


517.15 


517.40 


517.65 


517.91 


20.40 


518.16 


518.42 


518.67 


518.92 


519.18 


519.43 


519.69 


519.94 


520.19 


520.45 


20.50 


520.70 


520.96 


521.21 


521.46 


521.72 


521.97 


522.23 


522.48 


522.73 


522.99 


20.60 


523-24 


523-50 


523.75 


524.00 


524.26 


524-51 


524.77 


525-02 


525-27 


525-53 


20.70 


525-78 


526.04 


526.29 


526.54 


526.80 


526.95 


527.31 


527-56 


527.81 


528.07 


20.80 


528.32 


528.58 


528.83 


529.08 


529.34 


529.59 


529.85 


530-10 


530.35 


530-61 


20.90 


530.86 


531-12 


531.37 


531.62 


531.88 


532.13 


532.39 


532-64 


.532.89 


533.15 


21.00 


533-40 


533-66 


533.91 


534-16 


534.42 


534.67 


534.93 


535-18 


535.43 


535.69 


21.10 


535-94 


536.20 


536.45 


536.70 


536.96 


537.21 


537.47 


537-72 


537.98 


538.23 


21.20 


53B.4« 


538.74 


538.99 


539.24 


539.50 


539.75 


540.01 


540.26 


540.51 


540.77 


21.30 


541.02 


541-28 


541-53 


541.78 


542.04 


542.29 


542.55 


542.80 


543.05 


543.31 


21.40 


543-56 


543-82 


544-07 


544.32 


544. 58 


544. S3 


545.09 


545.34 


545.59 


545.85 


21.50 


546.10 


546-36 


546.61 


546. 86 


547.12 


547-37 


547.63 


547.88 


548-13 


548.39 


21.60 


548.64 


548.90 


549-15 


549.40 


549-66 


549-91 


550.17 


550.42 


550-67 


550.93 


21.70 


551.18 


551-44 


551.69 


551-94 


552.20 


552-45 


552.71 


552.96 


553-21 


553-47 


21.80 


553-72 


553-98 


554.23 


554-48 


554.74 


554.99 


555.25 


555.50 


555.75 


556.01 


21.90 


556.26 


556-52 


556.77 


557.02 


557.28 


557-53 


557-79 


55S.04 


558.29 


558.55 


22.00 


55S.80 


559.06 


559-31 


559-56 


559.82 


560.07 


560.03 


560.58 


560.83 


561.09 


22.10 


561.34 


561.60 


561-85 


562.10 


562.36 


562.61 


562.87 


563.12 


563.37 


563.63 


22.20 


563.88 


564.14 


564-39 


564-64 


564.90 


565.15 


565-41 


565-66 


565.91 


566.17 


22.30 


566.42 


566.68 


566.93 


567.18 


567.44 


567.69 


567-95 


568.20 


568.45 


568.71 


22.40 


56S.96 


569.22 


569-47 


569.72 


569.98 


570.23 


570.49 


570.74 


570.99 


571.25 


22.50 


571-50 


571.76 


572.01 


572.26 


572.52 


572.77 


573.03 


573-28 


573-53 


573-79 


22.60 


574-04 


574.30 


574-55 


574.80 


575.06 


575.31 


575-57 


575-82 


576-07 


576.33 


22.70 


576-58 


576.84 


577.09 


577.34 


577.60 


577-95 


578.11 


578.36 


578-61 


578.87 


22.80 


579-12 


579.38 


579.63 


579-88 


580.14 


580.39 


580.65 


580.90 


581.15 


581.41 


22.90 


581.66 


581.92 


582.17 


582.42 


582.68 


582.93 


583.19 


583-44 


583-69 


583.95 


23.00 


584-20 


584-46 


584.71 


584.96 


585.22 


585-47 


585.73 


5S5-98 


586.23 


586.49 


23.10 


5S6.74 


587.00 


587.25 


587-50 


587.76 


5S8.01 


588.27 


588.52 


588.77 


589.03 


23.20 


589-28 


589.54 


589.79 


590.04 


590.30 


590-55 


590.81 


591.06 


591-31 


591.57 


23-30 


591-82 


592.08 


592.33 


592-58 


592.84 


593.09 


593.35 


593-60 


593-85 


594-11 


23.40 


594-36 


594.62 


594.87 


595-12 


595.38 


595-63 


595-89 


596.14 


596-39 


596-65 


23.50 


596.90 


597-16 


597.41 


597-66 


59792 


598.17 


598.43 


598. 68 


598-93 


599-19 


23.60 


599-44 


599-70 


599-95 


600. 20 


600.46 


600.71 


600.97 


601.22 


601.47 


601.73 


23.70 


601.98 


602.24 


602.49 


602.74 


603.00 


603.25 


603.51 


603.76 


604.01 


604.27 


23.80 


604.52 


604.78 


605.03 


605.28 


605.54 


605.79 


606.05 


606.30 


606.55 


606.81 


23.90 


607.06 


607.32 


607.57 


607.82 


608.08 


608.33 


608.59 


60S. 84 


609.09 


609.35 


24.00 


609.60 


609.86 


610. 1 1 


610.36 


610.62 


610.87 


611. 13 


611.38 


611.63 


611.89 


24.10 


612.14 


612.40 


612.65 


612.90 


613.16 


613.41 


613.67 


613.92 


614.17 


614-43 


24.20 


614.68 


614.94 


615.19 


615.44 


615.70 


615.95 


616.21 


616.46 


616.71 


616.97 


24.30 


617.22 


617.48 


617.73 


617.9S 


618.24 


618.49 


618.75 


619.00 


619-25 


619.51 


24.40 


619.76 


620.02 


620.27 


620.52 


620.78 


621.03 


621.29 


621.54 


621.79 


622.05 


24.50 


622.30 


622.56 


622.81 


623.06 


623.32 


623.57 


623.83 


624.08 


624.33 


624.59 


24.60 


624.84 


625 10 


625.35 


625.60 


625.86 


626.11 


626.37 


626.62 


626.87 


627.13 


24.70 


627.38 


627.64 


627.89 


628.14 


628.40 


628.65 ' 


628.91 


629.16 


629.41 


629.67 


24.80 


629.92 


630.18 


630.43 


630.68 


630.94 


631.19 


631.45 


631.70 


631.95 


632.21 


24.90 


632.46 


632.72 


632.97 


633.22 


633.48 


633-73 


63-3.99 


634.24 


634.49 


634-75 


25.00 


635.00 


635.26 


635.51 


635.76 


636.02 


636.27 


636.53 


636.78 


637.03 


637.29 i 


Proper 


tional Parts ^°'^^' °°°^ °-°°^ °-°°3 0-004 0-005 0.006 0.007 o.ooS 0.009 




mm. 0.025 0.051 0.076 0.102 0.127 0.152 0.178 0.203 0.229 



Smithsonian Tables. 



20 



Table 9, 



INCHES INTO MILLIMETERS. 

I inch = 25.40005 mm. 



Inches. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 




mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


25.00 


635.00 


635-26 


635-51 


635-76 


636.02 


636.27 


636.53 


636.78 


637.03 


637.29 


25.10 


637-54 


637.80 


638.05 


638.30 


638.56 


63S.81 


639.07 


639.32 


639-57 


639-83 


25.20 


640. oS 


640.34 


640.59 


640.84 


641.10 


641-35 


641.61 


641.86 


642.11 


642.37 


25-30 


642.62 


642.88 


643-13 


643.38 


643.64 


643.89 


644.15 


644.40 


644.65 


644.91 


25.40 


645.16 


645.42 


645.67 


645.92 


646.18 


646.43 


646.69 


646.94 


647.19 


647-45 


25.50 


647.70 


647.96 


648.21 


64S.46 


648.72 


648.97 


649.23 


649.48 


649-73 


649.99 


25.60 


650.24 


650.50 


650.75 


651.00 


651.26 


651-51 


651.77 


65'..02 


654.27 


652.53 


25.70 


652.78 


653-04 


653-29 


653-54 


653-80 


654.05 


654-31 


654.56 


654-81 


655-07 


25.80 


655-32 


655-58 


65 5 -S3 


656.0S 


656.34 


656.59 


656.85 


657.10 


657-35 


657.61 


25.90 


657-86 


658.12 


658.37 


658.62 


658.88 


659.13 


659.39 


659-64 


659-89 


660. 15 


26.00 


660.40 


660.66 


660.91 


661.16 


661.42 


661.67 


661.93 


662.18 


662.43 


662.69 


26.10 


662.94 


663.20 


663.45 


663.70 


663.96 


664.21 


664.47 


664.72 


664.97 


665.23 


26.20 


665.48 


665.74 


665-99 


666. 24 


666.50 


666.75 


667.01 


667.26 


667.51 


667-77 


26.30 


66S.02 


668.28 


668.53 


668.78 


669.04 


669.29 


669-55 


669.80 


670.05 


670.31 


26.40 


670.56 


670.82 


671.07 


671.32 


671.58 


671.83 


672.09 


672.34 


672.59 


672.85 


26.50 


673.10 


673-36 


673.61 


673.86 


674.12 


674.37 


674.63 


674.88 


675-13 


675-39 


26.60 


675.64 


675-90 


676.15 


676.40 


676.66 


676.91 


677.17 


677.42 


677.67 


677-93 


26.70 


678.18 


678.44 


678.69 


678.94 


679.20 


679-45 


679.71 


679.96 


680.21 


680.47 


26.80 


680.72 


680.98 


681.23 


6S1.48 


681.74 


6S1.99 


682.25 


682.50 


682.75 


683.01 


26.90 


683.26 


683.52 


683.77 


684.02 


684.28 


684-53 


684.79 


685.04 


685.29 


685-55 


27.00 


685.80 


686.06 


686.31 


686.56 


686.82 


687.07 


6S7.33 


687.58 


687.83 


688.09 


27.10 


688.34 


688.60 


688. 85 


689.10 


689.36 


689.61 


689.87 


690.12 


690.37 


690.63 


27.20 


690. 88 


691.14 


691-39 


691.64 


691.90 


692.15 


692.41 


692.66 


692.91 


693.17 


27.30 


693.42 


693.68 


693-93 


694. 18 


694-44 


694.69 


694-95 


695.20 


695-45 


695-71 


27.40 


695.96 


696.22 


696.47 


696.72 


696.98 


697.23 


697-49 


697.74 


697.99 


698.25 


27.50 


698.50 


698.76 


699.01 


699. 26 


699.52 


699.77 


700.03 


700.28 


700.53 


700.79 


27.60 


701.04 


701.30 


701.55 


701.80 


702.06 


702.31 


702.57 


702.82 


703-07 


703-33 


27.70 


703-58 


703.84 


704.09 


704-34 


704.60 


704.85 


705.11 


705-36 


705.61 


705-87 


27.80 


706.12 


706. 38 


706.63 


706. 88 


707.14 


707.39 


707.65 


707.90 


708.15 


708.41 


27.90 


708.66 


708.92 


709.17 


709.42 


709.68 


709.93 


710.19 


710.44 


710.69 


710.95 


28.00 


711.20 


711.46 


711. 71 


711.96 


712.22 


712.47 


712.73 


7 1 2. 98 


713-23 


713-49 


28.10 


713-74 


714.00 


714-25 


714.50 


714-76 


715.01 


715-27 


715-52 


715-77 


716.03 


28.20 


716.2S 


716.54 


716.79 


717.04 


717.30 


717-55 


717.81 


718.06 


718.31 


718.57 


28.30 


718.S2 


719.08 


719-33 


719-58 


719.84 


720.09 


720.35 


720.60 


720.85 


721. II 


28.40 


721.36 


721.62 


721.87 


722.12 


722.39 


722.63 


722.89 


723-14 


723-39 


723-65 


28.50 


723.90 


724.16 


724.41 


724.66 


724.92 


725-17 


725.43 


725-68 


725-93 


726.19 


28.60 


726.44 


726.70 


726.95 


727.20 


727.46 


727.71 


727-97 


728.22 


728.47 


728.73 


28.70 


728.98 


729-24 


729.49 


729.74 


730.00 


730.25 


730-51 


730.76 


731.01 


731.27 


28.80 


731-52 


731-78 


732.03 


732.28 


732.54 


732.79 


733.05 


733-30 


733-55 


733-81 


28.90 


734.06 


734-32 


734-57 


734.82 


735.08 


735-33 


735-59 


735-84 


736.09 


736-35 


29.00 


736.60 


736.86 


737-11 


737.36 


737.62 


737.87 


738.13 


738-38 


738.63 


738.89 


29.10 


739-14 


739-40 


739-65 


739.90 


740.16 


740.41 


740.67 


740-92 


741.17 


741.43 


29.20 


741.68 


741-94 


742.19 


742.44 


742.70 


742-95 


743-21 


743-46 


743.71 


743-97 


29.30 


744.22 


744-48 


744-73 


744-98 


745-24 


745-49 


745-75 


746.00 


746-25 


746-51 


29.40 


746.76 


747.02 


747-27 


747-52 


747.78 


748.03 


748.29 


748-54 


748-79 


749-05 


29.50 


749-30 


749-56 


749.81 


750.06 


750.32 


750.57 


750.83 


751-08 


751-33 


751-59 


29.60 


751-84 


752.10 


752-35 


752.60 


752.86 


753-11 


753-37 


753.62 


753-87 


754-13 


29.70 


754-38 


754-64 


754-89 


755-14 


755-40 


755-65 


755.91 


756.16 


756.41 


756.67 


29.80 


756-92 


757-18 


757.43 


757.68 


757-94 


758.19 


758.45 


758.70 


758.95 


759.21 


29.90 


759-46 


759-72 


759-97 


760.22 


760.48 


760.73 


760.99 


761.24 


761-49 


761.75 


30.00 


762.00 762.26 


762.51 


762.76 


763.02 


763.27 


763.53 


763.78 


764.03 


764. 29 


Prnpo 


„ Inch, o.ooi 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 




mm. 0.025 0.051 0.076 0.102 0.127 0.152 0.178 0.203 0.229 



Smithsonian Tables. 



21 



Table 9. 



INCHES INTO MILLIMETERS. 
I inch = 25.40005 mm. 



Inches. 


.00 


.01 .02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 




:niu. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


30.00 

30.10 
30.20 
30-30 
30.40 


762.00 

764-54 
767.08 
769.62 
772.16 


762.26 
764.80 

767-34 
769.88 

772.42 


762.5) 
765-05 
767-59 
770.13 
772.67 


762.76 
765-30 
767-84 
770.38 
772.92 


763.02 
765-56 
768.10 
770.64 
773-18 


763-27 
765. 8 1 
768.35 
770.89 
773-43 


763.53 
766.07 
768.61 
771-15 
773-69 


763.78 
766.32 
768.86 
771.40 
773.94 


764.03 
766.57 
769.11 
771.65 
774.19 


764.29 
766.83 

769.37 
771.91 

774-45 


30.50 

30.60 
30.70 
30.80 
30.90 


774- 70 
777-24 
779-78 
782.32 
784.86 


774.96 

777-50 
780.04 
782.58 
785.12 


775-21 

777-75 
780.29 
782.83 
785-37 


775-46 
778.00 
780.54 
783.08 
785.62 


775-72 
778.26 
780.80 

783-34 
785.88 


775-97 
778.51 
781.05 

783-59 
786.13 


776.23 

778.77 
781.31 

783-85 
786.39 


776.48 
779.02 

781.56 
784.10 
7S6.64 


776.73 
779.27 
781.81 

784.35 
786.89 


776.99 
779-53 
782.07 
784.61 
787.15 


31.00 

31.10 
31.20 
31-30 
31.40 


787-40 
789.94 
792-48 
795.02 
797-56 


787.66 
790.20 

792.74 
795-28 
797.82 


787.91 

790.45 
792.99 

795-53 
798.07 


7S8.16 
790.70 
793-24 
795-78 
798-32 


788.42 
790.96 
793.50 
796.04 
798.58 


788.67 
791.21 

793-75 
796.29 

79S.83 


788.93 
791-47 
794-01 
796.55 
799.09 


789.18 
791.72 
794.26 
796.80 
799-34 


789.43 
791-97 
794-51 
797-05 
799-59 


789.69 
792.23 
794-77 
797-31 
799-85 


31.50 

31.60 
31.70 
31.80 
31.90 


800. 10 
802.64 
805.18 
807.72 
810.26 


800.36 
802.90 

805.44 
807.98 
810.52 


800.61 

803.15 
805.69 
808.23 
810.77 


800.86 

803.40 

805.94 
S0S.48 
811.02 


801.12 
803.66 
806.20 
808.74 
811. 28 


801.37 
803.91 
806.45 
808.99 
811.53 


801.63 
804.17 
806.71 
809. 25 
811.79 


801.88 
804.42 
806.96 
809.50 
812.04 


802.13 
804.67 
807.21 

809.75 
812.29 


802.39 
804.93 

807.47 
Sro.oi 

812.55 


32.00 

1 


812.80 




















1 

1 4- 1 p » Inch, o.ooi 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 
'^ ' mm. 0.025 0.051 0.076 0.102 0.127 0.152 0.178 0.203 0.229 



Smithsonian Table« 



22 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Table 10. 



Milli- 
meters. 





1 


2 


3 


4 


5 


6 


7 


1 

8 


9 






Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 







0.0000 


0.0394 


0.0787 


O.I181 


0.1575 


0.1968 


0.2362 


0.2756 


0.3150 


0.3543 




10 


0.3937 


0.4331 


0.4724 


0.51 18 


0.5512 


0.5906 


0.6299 


0.6693 


0.7087 


0.7480 




20 


0.7874 


0.8268 


0.8661 


0.9055 


0.9449 


0.9842 


1.0236 


1.0630 


1. 1024 


1. 1417 




30 


I.1811 


1.2205 


1.2598 


1.2992 


1.3386 


1.3780 


I.4173 


1.4567 


1. 496 1 


1-5354 




40 


1-5748 


I.6142 


1-6535 


1.6929 


1.7323 


I.7716 


I.8110 


1.8504 


1.8898 


1.9291 




50 


1.9685 


2.0079 


2.0472 


2.0866 


2.1260 


2.1654 


2.2047 


2.2441 


2.2835 


2.3228 




60 


2.3622 


2.4016 


2.4409 


2.4803 


2.5197 


2.5590 


2.5984 


2.6378 


2.6772 


2.7165 




70 


2-7559 


2.7953 


2.8346 


2.8740 


2.9134 


2.9528 


2.9921 


3-0315 


3.0709 


3.1102 




80 


3-1496 


3.1890 


3-2283 


3.2677 


3-3071 


3-3464 


3.3858 


3-4252 


3-4646 


3-5039 




90 


3-5433 


3-5828 


3.6220 


3.6614 


3.7008 


3.7402 


3.7795 


3-8189 


3-8583 


3-8976 




100 


3-9370 


3-9764 


4-0157 


4.0551 


4.0945 


4.1338 


4.1732 


4.2126 


4.2520 


4-2913 




no 


4-3307 


4-3701 


4.4094 


4.44S8 


4.4882 


4-5276 


4.5669 


4.6063 


4.6457 


4.6850 




120 


4.7244 


4.7638 


4.8031 


4.8425 


4.8819 


4.9212 


4.9606 


5.0000 


5-0394 


5-0787 




130 


5-I181 


5-1575 


5.1968 


5.2362 


5.2756 


5.31.50 


5-3543 


5-3937 


5-4331 


5-4724 




140 


5-5118 


5-5512 


5-5905 


5.6299 


5.6693 


5-7086 


5.7480 


5.7874 


5.8268 


5.8661 




150 


5-9055 


5-9449 


5-9842 


6.0236 


6.0630 


6.1024 


6.1417 


6.1811 


6.2205 


6.2598 




160 


6.2992 


6.3386 


6.3779 


6.4173 


6.4567 


6.4960 


6.5354 


6.5748 


6.6142 


6.6535 




170 


6.6929 


6.7323 


6.7716 


6.81 10 


6.8504 


6.8898 


6.9291 


6.9685 


7.0079 


7.0472 




180 


7.0S66 


7.1260 


7.1653 


7.2047 


7.2441 


7.2834 


7.3228 


7.3622 


7.4016 


7.4409 




190 


7.4803 


7-5197 


7.5590 


7-5984 


7.6378 


7.6772 


7.7165 


7-7559 


7-7953 


7.8346 




200 


7.8740 


7-9134 


7-9527 


7.9921 


8.0315 


8.0708 


8.1 102 


8.1496 


8.1890 


8.2283 




210 


8.2677 


8.3071 


8.3464 


8.3858 


8.4252 


8.4646 


8.5039 


8.5433 


8.5827 


8.6220 




220 


8.6614 


8.7008 


8.7401 


8.7795 


8.8189 


8.8582 


8.8976 


8.9370 


8.9764 


9-0157 




230 


9-0551 


9-0945 


9-1338 


9.1732 


9.2126 


9-2520 


9.2913 


9.3307 


9.3701 


9.4094 




240 


9.44S8 


9.4882 


9-5275 


9-5669 


9.6063 


9.6456 


9.6850 


9.7244 


9-7638 


9.8031 




250 


9.8425 


9.8819 


9.9212 


9.9606 


10.0000 


10.0394 


10.0787 


10.1181 


10.1575 


10.1968 




260 


10.2362 


10.2756 


10.3149 


10.3543 


10.3937 


10.4330 


10.4724 


10.5118 


10.5512 


10.5905 




270 


10.6299 


10.6693 


10.7086 


10.7480 


10.7874 


10.8268 


10.8661 


10.9055 


10.9449 


10.9842 




280 


11.0236 


11.0630 


II. 1023 


II.1417 


II. 181 J 


11.2204 


11.2598 


11.2992 


11.3338 


11.3779 




290 


"•4173 


11.4568 


1 1 .4960 


11-5354 


11.5748 


II.6142 


11.6535 


11.6929 


11.7323 


11.7716 




300 


11.8110 


11.8504 


11.8897 


11.9291 


11.9685 


12.0078 


12.0472 


12.0866 


12.1260 


12.1653 




310 


12.2047 


12.2441 


12.2834 


12.3228 


12.3622 


12.4016 


12.4409 


12.4803 


12.5197 


12.5590 




320 


12.5984 


12.6378 


12.6771 


12.7165 


12.7559 


12.7952 


12.8346 


12.8740 


12.9134 


12.9527 




330 


12.9921 


13-03T5 


13.0708 


13.1102 


13.1496 


13.1890 


13.2283 


13.2677 


13.3071 


13-3464 




340 


13-3858 


13-4252 


13-4645 


13-5039 


13-5433 


13.5826 


13.6220 


13.6614 


13.7008 


13.7401 




350 


13-7795 


13.8189 


13.8582 


13.8976 


13.9370 


13-9764 


14.0157 


14.0551 


14.0945 


14-1338 




360 


14.1732 


14.2126 


14.2519 


14.2913 


14.3307 


14.3700 


14.4094 


14.4488 


14.4882 


14-5275 




370 


14.5669 


14.6063 


14.6456 


14 6850 


14.7244 


14.7638 


14.8031 


14.8425 


14.8819 


14.9212 




380 


14.9606 


15.0000 


15-0393 


15.0787 


15.1181 


15-1574 


15.1968 


15.2362 


15-2756 


15-3149 




390 


15-3543 


15-3937 


15-4330 


15-4724 


15.5118 


15.5512 


15.5905 


15.6299 


15-6693 


15.7086 




400 


15.7480 


15.7874 


15.8267 


15.8661 


15.9055 


15.9448 


15.9842 


16.0236 


16.0630 


16.1023 






Tenths of a millimeter. 


Hundredths of a millimeter. 




mm. 


Inch. 


mm. 


Inch. 


mm. 


Inch. 


mm. 


Inch. 






0.1 


0.0039 


0.6 


0.0236 


O.OI 


n.0004 


0.06 


0.C024 






.2 


.0079 


■7 


.0C76 


.02 


.0008 


.07 


.0028 






•3 


.0118 


.S 


.0315 


.03 


.0012 


.08 


.0031 






■4 


.0157 


■9 


•0354 


.04 


.0016 


.09 


•0035 






.5 


.0197 


l.o 


•0394 


.05 


.0020 


.10 


.0039 





Smithsonian Tables. 



23 



Table 10. 



MILLIMETERS INTO INCHES. 

I mm. ^0.03937 inch. 



Milli- 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


meters. 
























Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


400 


15-748 


15-752 


15-756 


15.760 


15-764 


15.768 


15-772 


15-776 


15-779 


15.783 


i 401 


15-787 


15-791 


15-795 


15-799 


15-803 


15.807 


15.811 


15.815 


15.819 


15-823 


' 402 


15.827 


15-831 


15-835 


15-839 


15-842 


15-846 


15-850 


15.854 


15-858 


15.862 


403 


15.866 


15.870 


15-S74 


15-878 


15.882 


15.886 


15.890 


15-894 


15-898 


15.902 


404 


15-905 


15-909 


15-913 


15-917 


15.921 


15-925 


15-929 


15-933 


15-937 


15-941 


405 


15-945 


15-949 


15-953 


15-957 


15.961 


15-965 


15.968 


15-972 


15-976 


15.980 


406 


15-984 


15.988 


15-992 


15-996 


16.000 


16.004 


16.008 


16.012 


16.016 


16.020 


407 


16.024 


16.028 


16.031 


16.035 


16.039 


16.043 


16.047 


16.051 


16.055 


16.059 ' 


408 


16.063 


16.067 


16.071 


16.075 


16.079 


16.0S3 


16.087 


16.091 


16.094 


16.098 


409 


16.102 


16.106 


16. no 


16.114 


16.I18 


16.122 


16.126 


16.130 


16.134 


16.138 


410 


16.142 


16.146 


16.150 


16.154 


16.157 


16. 161 


16.165 


16.169 


16.173 


16.177 


411 


16. 181 


16.185 


16.189 


16.193 


16.197 


16.201 


16.205 


16.209 


16.213 


16.217 


412 


16.220 


16.224 


16.228 


16.232 


16.236 


16.240 


16.244 


16.248 


16.252 


16.256 


413 


16.260 


16.264 


16.268 


16.272 


16.276 


16.279 


16.283 


16.287 


16.29X 


16.295 


414 


16.299 


16.303 


16.307 


16.3II 


16.315 


16.319 


16.323 


16.327 


16.331 


16.335 


415 


16.339 


16.342 


16.346 


16.350 


16.354 


16.358 


16.362 


16.366 


16.370 


16.374 


416 


16.378 


16.3S2 


16.386 


16.390 


16.394 


16.398 


16.402 


16.405 


16.409 


16.413 


417 


16.417 


16.421 


16.425 


16.429 


16.433 


16.437 


16.441 


16.445 


16.449 


16.453 ! 


418 


16.457 


16.461 


16.465 


16.468 


16.472 


16.476 


16.480 


16.484 


16.488 


16.492 


419 


16.496 


16.500 


16.504 


16.508 


16.512 


16.516 


16.520 


16.524 


16.528 


16.531 


420 


16.535 


16.539 


16.543 


16.547 


16.551 


16.555 


16.559 


16.563 


16.567 


16.571 


421 


16.575 


16.579 


16.583 


16.5S7 


16.591 


16.594 


16.59S 


16.602 


16.606 


16.610 


422 


16.614 


16.618 


16.622 


16.626 


16.630 


16.634 


16.63S 


16.642 


16.646 


16.650 


423 


16.654 


16.657 


16.661 


16.665 


16.669 


16.673 


16.677 


16.681 


16.685 


16.689 


424 


16.693 


16.697 


16.701 


16.705 


16.709 


16.713 


16.717 


16.720 


16.724 


16.728 


425 


16.732 


16.736 


16.740 


16.744 


16.748 


16.752 


16.756 


16.760 


16.764 


16.768 


426 


16.772 


16.776 


16.779 


16.783 


16.787 


16.791 


16.795 


16.799 


16.S03 


16.807 


427 


16.811 


16.815 


16.819 


16.823 


16.827 


16.831 


16.835 


16.839 


16.S42 


16.846 


428 


16.S50 


16.854 


16.858 


16.862 


16.866 


16.870 


16.874 


16.878 


16.S82 


16.886 


429 


16.890 


16.894 


16.898 


16.902 


16.905 


16.909 


16.913 


16.917 


16.921 


16.925 


430 


16.929 


16.933 


16.937 


16.941 


16.945 


16.949 


16.953 


16.957 


16.961 


16.965 


431 


16.968 


16.972 


16.976 


16.9S0 


16.984 


16.9S8 


16.992 


16.996 


17.000 


17.004 


432 


17.008 


17.012 


17.016 


17.020 


17.024 


17.028 


17.031 


17-035 


17.039 


17.043 


433 


17.047 


17.051 


17-055 


17-059 


17.063 


17.067 


17.071 


17-075 


17.079 


17.083 


434 


17.087 


17.091 


17.094 


17.098 


17.102 


17.106 


17.110 


17.114 


17.118 


17.122 


435 


17.126 


17.130 


17-134 


17.138 


17.142 


17.146 


17.150 


17-154 


17.157 


17. 161 


43^ 


17165 


17.169 


17-173 


17.177 


17.1S1 


17.185 


17.189 


17.193 


17.197 


17.201 


437 


17.205 


17.209 


17.213 


17.217 


17.220 


17.224 


17.228 


17.232 


17.236- 


17.240 : 


43« 


17.244 


17.248 


17.252 


17.256 


17.260 


17.264 


17.268 


17.272 


17.276 


17.279 


439 


17.283 


17.287 


17.291 


17.295 


17.299 


17-303 


17.307 


17.311 


17-315 


17.319 


440 


17-323 


17.327 


17-331 


17-335 


17-339 


17.342 


17-346 


17-350 


17-354 


17-358 


441 


17.362 


17.366 


17.370 


17-374 


17-378 


17.382 


17.386 


17.390 


17-394 


17-398 


442 


17.402 


17-405 


17.409 


17-413 


17.417 


17.421 


17-425 


17.429 


17-433 


17-437 


443 


17.441 


17-445 


17-449 


17-453 


17-457 


17.461 


17-465 


17.468 


17.472 


17.476 


444 


17.480 


17.484 


17.488 


17.492 


17.496 


17-500 


17-504 


17.508 


17.512 


17-516 


445 


17.520 


17.524 


17-528 


17.531 


17-535 


17-539 


17-543 


17-547 


17-551 


17-555 


446 


17-559 


17-563 


17-567 


17.571 


17-575 


17-579 


17-583 


17.587 


17-591 


17-594 


447 


17-598 


17.602 


17.606 


17.610 


17.614 


17.618 


17.622 


17.626 


17.630 


17-634 


448 


17-6.38 


17.642 


17.646 


17-650 


17-654 


17-657 


17.661 


17.665 


17.669 


17-673! 


449 


17.677 


17.681 


17.685 


17.689 


17-693 


17.697 


17.701 


17-705 


17.709 


17-713; 


450 


17.717 


17.720 


17.724 


17.728 


17.732 


17.736 


17.740 


17-744 


17.748 


17-752 



Smithsonian Tables. 



24 



Table 1 O. 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Milli- 
meters, 


.0 .1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


450 


17.717 


17.720 


17.724 


17.728 


17.732 


17.736 


17.740 


17-744 


17.748 


17-752 


451 


17-756 


17.760 


17.764 


17.768 


17.772 


17.776 


17.779 


17-783 


17.787 


17.791 


452 


17-795 


17-799 


17.803 


17.S07 


17.S1I 


17.815 


17.819 


17.823 


17-827 


17.831 


453 


17-835 


17-839 


17.842 


17.846 


17.850 


17-854 


17.858 


17.862 


1 7. 866 


17.870 


454 


17.874 


17-878 


17.882 


17.8S6 


17.890 


17.894 


17.898 


17.902 


17-905 


17.909 


455 


17-913 


17.917 


17.921 


17-925 


17.929 


17-933 


17-937 


17.941 


17-945 


17-949 


456 


17-953 


17-957 


17.961 


17-965 


17.968 


17.972 


17.976 


17.9S0 


17-984 


17.988 


457 


17.992 


17.996 


18.000 


18.004 


18.008 


18.012 


18.016 


18.020 


18.024 


18.028 


458 


18.031 


18.035 


18.039 


18.043 


18.047 


18.051 


18.055 


18.059 


18.063 


1 8. 067 


459 


18.071 


18.075 


18.079 


18.083 


18.0S7 


18.091 


18.094 


18.098 


18.102 


18.106 


460 


18.110 


18. 1 14 


18.I1S 


18.122 


18.126 


18.130 


18.134 


18.138 


18.T42 


18.146 


461 


18.150 


18.154 


18.157 


18. 161 


18.165 


18.169 


18.173 


18.177 


18. 181 


18.185 


462 


18.189 


18.193 


18.197 


18.201 


18.205 


18.209 


18.213 


18.216 


18.220 


18.224 


463 


18.228 


18.232 


18.236 


18.240 


18.244 


18.248 


18.252 


18.256 


18.260 


18.264 


464 


18.268 


18.272 


18.276 


18.279 


18.283 


18.287 


18.291 


18.295 


18.299 


18.303 


465 


18.307 


18.311 


18.315 


18.319 


18.323 


18.327 


18.331 


18.335 


18.339 


18.342 


466 


18.346 


18.350 


18.354 


18.358 


18.362 


18.366 


18.370 


18.374 


18.378 


18.382 


467 


18.386 


18.390 


18-394 


18.39S 


18.402 


18.405 


18.409 


18.413 


18.417 


18.421 


468 


18.425 


18.429 


18.433 


18.437 


18.441 


18.445 


18.449 


18.453 


18.457 


18.461 


469 


18.465 


18.468 


18.472 


18.476 


18.4S0 


18.484 


18.488 


18.492 


18.496 


18.500 


470 


18.504 


18.508 


18.512 


18.516 


18.520 


18.524 


18.528 


18.531 


18.535 


18.539 


47 i 


18.543 


18.547 


18.551 18.555 


18.559 


18.563 


18.567 


18.571 


18.575 


18.579 


472 


18.583 


18.587 


18.591 


18.594 


18.598 


18.602 


18.606 


18.610 


18.614 


18.618 


473 


18.622 


18.626 


18.630 


18.634 


18.638 


18.642 


18.646 


18.650 


18.654 


18.657 


474 


18.661 


18.665 


18.669 


18.673 


18.677 


18.681 


18.6S5 


18.689 


18.693 


18.697 


475 


18.701 


18.705 


18.709 


18.713 


18.716 


18.720 


18.724 


18.72S 


18.732 


18.736 


476 


18.740 


18.744 


18.748 


18.752 


18.756 


18.760 


18.764 


18.768 


18.772 


18.776 


477 


18.779 


18.783 


18.787 


18.791 


18.795 


18.799 


18.803 


18.807 


18.811 


18.815 


478 


18.819 


18.823 


18.827 


18.831 


18.835 


18.839 


18.842 


18.846 


18.850 


18.854 


479 


18.858 


18.862 


18.866 


18.870 


18.874 


1S.878 


18.882 


18.886 


18.890 


18.894 


480 


18.898 


18.902 


18.905 


18.909 


18.913 


18.917 


18.921 


18.925 


18.929 


18.933 


481 


18.937 


18.941 


18.945 


18.949 


18.953 


18.957 


18.961 


18.965 


18.968 


18.972 


4S2 


18.976 


18.980 


18.984 


18.9S8 


18.992 


18.996 


19.000 


19.004 


19.008 


19.012 


483 


19.016 


19.020 


19.024 


19.028 


19.031 


19-035 


19.039 


19-043 


19.047 


19.051 


484 


19-055 


19-059 


19.063 


19.067 


19.071 


19-075 


19.079 


19-083 


19.087 


19.091 


485 


19.094 


19.098 


19.102 


19.106 


19.IIO 


19.II4 


19.I18 


19.122 


19.126 


19.130 


4S6 


19-134 


19.138 


19.142 


19.146 


19.150 


19-154 


19-157 


19.161 


19.165 


19.169 


487 


19-173 


19.177 


19. 181 


19.185 


19.189 


19-193 


19.197 


19.201 


19.205 


19.209 


488 


19.213 


19.216 


19.220 


19.224 


19.228 


19.232 


19.236 


19.240 


19.244 


19.248 


4S9 


19.252 


19.256 


19.260 


19.264 


19.268 


19.272 


19.276 


19.279 


19.283 


19.287 


490 


19.291 


19-295 


19.299 


19-303 


19.307 


I9.311 


19-315 


19-319 


19-323 


19.327 


491 


19-331 


19-335 


19-339 


19-342 


19-346 


19-350 


19-354 


19-358 


19.362 


19.366 


492 


19.370 


19-374 


19-378 


19.382 


19.386 


19.390 


19-394 


19-398 


19.402 


19-405 


1 493 


19.409 


19-413 


19.417 


19.421 


19-425 


19.429 


19-433 


19-437 


19.441 


19-445 


494 


19.449 


19-453 


19-457 


19.461 


19-465 


19.468 


19.472 


19.476 


19.480 


19.484 


! 495 


19.488 


19.492 


19.496 


19.500 


19-504 


19.508 


19.512 


19.516 


19.520 


19-524 


496 


19.528 


19-531 


19-535 


19-539 


19-543 


19-547 


19-551 


19-555 


19-559 


19-563 


497 


19-567 


19-571 


19-575 


19-579 


19-583 


19-587 


19-591 


19-594 


19-598 


19.602 


498 


19.606 


19.610 


19.614 


19.618 


19.622 


19.626 


19.630 


19-634 


19.638 


19.642 


499 


19.646 


19.650 


19-654 


19-657 


19.661 


19-665 


19.669 


19-673 


19.677 


19.681 


500 


19.685 


19.689 


19-693 


19.697 


19.701 


19-705 


19.709 


19-713 


19.716 


19.720 



Smuhsoni^n Tables. 



25 



Tablf. 1 O. 



MILLIMETERS INTO INCHES, 

I mm. ^=0.03937 inch. 



Milli- 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


meters. 
























Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inche.". 


Inches. 


500 


19-685 


19.689 


19-693 


19.697 


19.701 


19-705 


19.709 


19.713 


19.716 


19.720 


501 


19.724 


19.728 


19.732 


19.736 


19.740 


19-744 


19.748 


19.752 


19-756 


19.760 


502 


19.764 


19.768 


19.772 


19.776 


19.779 


19-783 


19.787 


19.791 


19-795 


19.799 


503 


19.803 


19.807 


19.81 1 


19.815 


19.819 


19.823 


19.827 


19.831 


19-835 


19-839 


504 


19.842 


19.846 


19.850 


19-854 


19.858 


19.862 


19.866 


19.870 


19.874 


19.878 


505 


19.882 


19.886 


19.890 


19.894 


19.S98 


19.902 


19-905 


19.909 


19-913 


19.917 


506 


19.921 


19-925 


19.929 


19-933 


19-937 


19.941 


19-945 


19.949 


19-953 


19-957 


507 


19.961 


19.965 


19.968 


19.972 


19.976 


19.980 


19.984 


19.988 


19.992 


19.996 


50S 


20.000 


20.004 


20.008 


20.012 


20.016 


20.020 


20.024 


20.028 


20.031 


20.035 


509 


20.039 


20.043 


20.047 


20.051 


20.055 


20.059 


20.063 


20.067 


20.071 


20.075 


510 


20.079 


20.083 


20.087 


20.091 


20.094 


20.098 


20. 102 


20.106 


20.110 


20.114 


511 


20.118 


20.122 


20.126 


20. 130 


20.134 


20.138 


20.142 


20.146 


20.150 


20.154 


512 


20.157 


20.161 


20.165 


20.169 


20.173 


20.177 


20. iSi 


20.185 


20.189 


20.193 


513 


20.197 


20.201 


20. 205 


20. 209 


20.213 


20.216 


20.220 


20.224 


20.228 


20.232 


514 


20.236 


20. 240 


20. 244 


20.248 


20.252 


20.256 


20.260 


20.264 


20.268 


20.272 


515 


20.276 


20.279 


20. 283 


20.2S7 


20.291 


20. 295 


20.299 


20.303 


20.307 


20.311 


516 


20.315 


20.319 


20.323 


20.327 


20.331 


20.335 


20.339 


20.342 


20.346 


20.350 


517 


20.354 


20.358 


20 362 


20.366 


20.370 


20.374 


20.378 


20.382 


20.386 


20.390 


518 


20.394 


20.39S 


20.402 


20. 405 


20.409 


20.413 


20.417 


20.421 


20.425 


20.429 


519 


20.433 


20.437 


20.441 


20.445 


20.449 


20.453 


20.457 


20.461 


20.465 


20.468 


520 


20.472 


20.476 


20.480 


20.484 


20.488 


20.492 


20.496 


20.500 


20.504 


20.508 


521 


20.512 


20.516 


20.520 


20.524 


20.528 


20.531 


20.535 


20.539 


20.543 


20.547 


522 


20.551 


20.555 


20.559 


20.563 


20.567 


20.571 


20.575 


20.579 


20.583 


20.587 


523 


20.591 


20.594 


20.598 


20.602 


20.606 


20.610 


20.614 


20.618 


20.622 


20.626 


524 


20.630 


20.634 


20.638 


20.642 


20.646 


20.650 


20.654 


20.657 


20.661 


20.665 


525 


20.669 


20.673 


20.677 


20.681 


20.685 


20. 689 


20.693 


20.697 


20.701 


20.705 


526 


20.709 


20.713 


20.716 


20.720 


20.724 


20.728 


20.732 


20.736 


20. 740 


20.744 


527 


20.748 


20.752 


20.756 


20. 760 


20.764 


20.768 


20.772 


20.776 


20.779 


20.783 


528 


20.787 


20.791 


20.795 


20.799 


20.803 


20.807 


20.811 


20.815 


20.819 


20.823 


529 


20.827 


20.831 


20.835 


20.839 


20.842 


20.846 


20.850 


20.854 


20.85S 


20.862 


530 


20.866 


20.870 


20.874 


20.878 


20.882 


20.886 


20. 890 


20.894 


20.898 


20.902 


531 


20.905 


20.909 


20.913 


20.917 


20.921 


20.925 


20.929 


20.933 


20.937 


20.941 


532 


20.945 


20.949 


20.953 


20.957 


20.961 


20.965 


20.968 


20.972 


20.976 


20.980 


533 


20.984 


20.988 


20.992 


20.996 


21.000 


21.004 


21.008 


21.012 


21.016 


21.020 


534 


21.024 


21.028 


21.031 


21.035 


21.039 


21.043 


21.047 


21.051 


21.055 


21.059 


535 


21.063 


21.067 


21.071 


21.075 


21.079 


21.083 


21.087 


21.091 


21.094 


21.098 


536 


21.102 


21.106 


21. no 


21. 114 


21. 118 


21.122 


21.126 


21.130 


21.134 


21.138 


537 


21.142 


21.146 


21.150 


21.154 


21.157 


21. 161 


21.165 


21.169 


■21.173 


21.177 


538 


21. 181 


21.185 


21.189 


21.193 


21.197 


21.201 


21.205 


21.209 


21.213 


21.216 


539 


21.220 


21.224 


21.228 


21.232 


21.236 


21.240 


21.244 


21.248 


21.252 


21.256 


540 


21.260 


2 1 . 264 


21.268 


21.272 


21.276 


21.279 


21.2S3 


21.287 


21.291 


21.295 


541 


21.299 


21.303 


21.307 


21. 311 


21.315 


21.319 


21.323 


21.327 


21.331 


21-335 


542 


21-339 


21.342 


21.346 


21.350 


21.354 


21.358 


21.362 


21.366 


21.370 


21.374 


543 


21.378 


21.382 


21.386 


21.390 


21.394 


21.398 


21.402 


21.405 


21.409 


21.413 


544 


21.417 


21.421 


21.425 


21.429 


21.433 


21.437 


21.441 


21.445 


21.449 


21.453 


545 


21.457 


21.461 


21.465 


21.468 


21.472 


21.476 


21.480 


21.484 


21.488 


21.492 


546 


21.496 


21.500 


21.504 


21.508 


21.512 


21.516 


21.520 


21.524 


21.528 


21.531 


547 


21.535 


21.539 


21.543 


21-547 


21.551 


21.555 


21-559 


21-563 


21.567 


21.571 


548 


21.575 


21.579 


2I.5S3 


21.587 


21.591 


21.594 


21.598 


21.602 


21.606 


21.610 


549 


21.614 


21.618 


21.622 


21.626 


21.630 


21.634 


21.638 


21.642 


21.646 


21.650 


550 


21.654 


21.657 


21.661 


21.665 


21.669 


21.673 


21.677 


21.681 


21.685 


21.689 



Smithsonian Tables. 



26 



Table 10. 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Milli- 
meters. 



550 

551 
552 
553 
554 

555 

556 
557 
558 
559 

560 

561 
562 

563 
564 

565 

566 

567 
568 

569 

570 

571 

572 
573 
574 

575 

576 
577 
578 
579 

580 

581 
582 
583 
584 

585 

586 

587 
588 

589 

590 

591 
592 
593 
594 

595 

596 
597 
598 
599 

600 



Inches. 

21.654 
2T.693 
21.732 
21.772 
21. 811 

2I.S5O 
21.890 
21.929 
21.968 
22.008 

22.047 
22.087 
22. 126 
22.165 
22.205 

22.244 
22.283 
22.323 
22.362 
22.402 

22.441 
22.480 
22.520 

22.559 
22.598 

22.638 
22.677 
22.716 
22.756 
22.795 

22.835 
22.874 
22.913 

22.953 
22.992 



.2 



Inches. 

21.657 
21.697 
21.736 
21.776 
21.815 

21.854 
21.894 
21-933 
21.972 
22.012 

22.051 
22.091 
22.130 
22.169 
22.209 

22.248 
22.287 
22.327 
22.366 
22.405 

22.445 
22.484 
22.524 
22.563 
22.602 

22.642 
22.681 
22.720 
22.760 
22.799 

22.839 
22.878 
22.917 

22.957 
22.996 



.3 



Inches. 

21.661 
21.701 
21.740 

21.779 
21.819 

21.858 
21.898 

21.937 
21.976 
22.016 

22.055 
22.094 
22.134 
22.173 
22.213 

22.252 
22.291 
22.331 
22.370 
22.409 

22.449 
22.488 
22.528 
22.567 
22.606 

22.646 
22.685 
22.724 
22.764 
22.803 



Inches. 

21.665 

21.705 
21.744 
21.783 
21.823 

21.862 
21.902 
21.941 
21.980 
22.020 

22.059 
22.098 
22.138 
22.177 
22.216 

22.256 
22.295 
22.335 

22.374 
22.413 

22.453 
22.492 
22.531 
22.571 
22.610 

22.650 
22.689 
22.728 
22.768 
22.807 



Inches. 

21.669 
21.709 
21.748 
21.787 
21.827 



.5 



Inches. 
21.673 
21.713 
21.752 
21.791 
21.831 



21.866 21.870 

21.905 21.909 

21.945 21.949 

21.984 21.988 

22.024 22.028 



23.031 
23.071 
23.110 
23-150 
23-189 



23-035 
23-075 
23.114 
23-153 
23-193 



22.842 
22.882 
22.921 
22.961 
23.000 

23.039 
23.079 
23.118 
23-157 
23-197 




23-425 
23-465 
23-504 
23-543 
23-583 

23.622 



23.429 
23.468 
23.508 
23-547 
23-587 

23.626 



22.846 
22.886 
22.925 
22.965 
23.004 

23-043 
23-083 
23.122 
23.161 
23.201 

23.240 
23-279 
23-319 
23-358 
23-398 



23-433 
23.472 

23-512 
23-551 
23-591 

23.630 



22.063 
22.102 
22.142 
22.181 
22.220 

22.260 
22.299 
22.339 
22.378 
22.417 

22.457 
22.496 

22.535 
22.575 
22.614 

22.653 
22.693 
22.732 
22.772 
22.811 

22.850 
22.S90 
22.929 
22.968 
23.008 

23.047 
23.087 
23.126 
23-165 
23-205 

23.244 
23-2S3 

23-323 
23.362 
23.402 



22.067 
22.106 
22.146 
22.185 
22.224 

22.264 
22.303 
22.342 
22.382 
22.421 

22.461 
22.500 

22.539 
22.579 
22.618 

22.657 
22.697 
22.736 
22.776 
22.815 

22.854 
22.894 

22.933 
22.972 
23.012 



Inches. 

21.677 
21.716 
21.756 

21.795 
21.835 

21.874 
21.913 

21-953 
21.992 
22.031 

22.071 
22.110 
22.150 
22.189 
22.228 

22.268 
22 307 
22-346 
22.386 
22.425 

22.465 
22.504 
22.543 
22.583 
22.622 

22.661 
22.701 
22.740 
22.779 
22.819 

22.858 
22.898 

22.937 
22.976 
23.016 



Inches. 

21.681 
21.720 
21.760 
21.799 
21.839 



Inches. 

21.685 
21.724 
21.764 
2 1 . 803 
21.842 



21.878 21.882 

21.917 21.921 

21 957 2I.96T 

21.996 22.000 

22.035 22.039 



23-437 
23-476 

23-5^6 
23-555 
23-594 

23-634 



23-441 
23.480 
23.520 
23-559 
23-598 

23-638 



23-051 
23.091 
23-130 
23. 169 
23.209 

23.248 
23.287 

23-327 
23.366 

23-405 

23-445 
23.484 
23-524 
23-563 
2^.602 



23-055 
23.094 

23-134 
23-173 
23-213 

23-252 
23.291 

23-331 
23-370 
23-409 



22.075 
22.114 

22.153 
22.193 
22.232 

22.272 
22.311 
22.350 
22.390 
22.429 

22.468 
22.508 
22.547 
22.587 
22.626 

22.665 
22.705 

22.744 
22.783 
22.823 

22.862 
22.902 
22.941 
22.980 
23.020 

23-059 
23.098 

23-138 
23-177 
23.216 

23.256 
23-295 

23-335 
23-374 
23-413 



22.079 
22.118 
22.157 
22.197 
22.236 

22.276 
22.315 
22.354 
22.394 
22.433 

22.472 
22.512 
22.551 
22.591 
22.630 

22.669 
22.709 

22.748 
22.787 
22.827 



Inches. 

21.689 
21.728 
21.768 
21.807 
21.846 

21.886 
21.925 

21.965 
22.004 
22.043 

22.083 
22.122 
22.161 
22.201 
22.240 

22.279 
22.319 
22.358 
22.398 
22.437 

22.476 
22.516 
22.555 
22.594 
22.634 

22.673 
22.713 
22.752 
22.791 
22.831 



23-449 

23-488 
23-528 

23-567 
23.606 



23.642 23.646 



23-453 
23.492 
23-531 
23-571 
23.610 

23.650 



22.866 
22.905 

22.945 
22.984 
23-024 

23.063 
23.102 

23 142 
23.181 
23.220 

23.260 
23.299 

23-339 
23-378 
23.417 

23-457 
23.496 

23-535 
23-575 
23.614 

23-653 



22.870 
22.909 I 
22.949 
22.988 I 
23.028 1 

23.067 
23.106 
23.146 
23-185 
23.224 

23. 2f 

23-303 
23.342 
23-382 
23.421 I 

23.461 
23.500 

23-539 
23-579 
23.618 

23-657 



tMlTHSONIAN TABLES. 

8 



Table 10. 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Milli- 
meters. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


600 


23.622 


23.626 


23-630 


23.634 


23-638 


23.642 


23.646 


23-650 


23.653 


23-657 


601 


23.661 


23.665 


23.669 


23.673 


23-677 


23.681 


23.685 


23.689 


23.693 


23.697 


602 


23.701 


23-705 


23.709 


23^713 


23.716 


23.720 


23-724 


23.728 


23.732 


23-736 


603 


23.740 


23-744 


23-748 


23.752 


23.756 


23.760 


23-764 


23.76S 


23.772 


23-776 


604 


23.779 


23-783 


23-787 


23.791 


23.795 


23-799 


23.803 


23.807 


23.811 


23.815 


605 


23.819 


23.823 


23.827 


23.831 


23.835 


23.S39 


23.842 


23.846 


23.850 


23.854 


606 


23.858 


23.862 


23.866 


23.870 


23.874 


23.878 


23.882 


23.886 


23.890 


23.894 


607 


23.898 


23.902 


23-905 


23-909 


23.913 


23.917 


23.921 


23-925 


23.929 


23.933 


608 


23-937 


23-941 


23-945 


23-949 


23.953 


23-957 


23.961 


23-965 


23.968 


23.972 


609 


23.976 


23.980 


23-984 


23-988 


23.992 


23.996 


24.000 


24.004 


24.008 


24.012 


610 


24.016 


24.020 


24.024 


24.028 


24.031 


24-035 


24-039 


24-043 


24-047 


24.051 


611 


24-055 


24-059 


24-063 


24.067 


24.071 


24-075 


24-079 


24-083 


24.087 


24.091 


612 


24.094 


24.098 


24. 102 


24.106 


24.110 


24.114 


24.118 


24.122 


24.126 


24.130 


613 


24-134 


24.138 


24.142 


24.146 


24.150 


24-153 


24-157 


24.161 


24.165 


24.169 


614 


24.173 24.177 


24.181 


24-185 


24.189 


24-193 


24.197 


24.201 


24.205 


24.209 


615 


24.213 


24.216 


24.220 


24.224 


24.228 


24.232 


24.236 


24. 240 


24.244 


24.248 


616 


24.252 


24.256 


24.260 


24.264 


24.268 


24.272 


24.276 


24.279 


24.283 


24.287 


617 


24.291 


24-295 


24.299 


24-303 


24.307 


24.311 


24-315 


24-319 


24.323 


24-327 


618 


24-331 


24-335 


24-339 


24.342 


24.346 


24-350 


24-354 


24-358 


24.362 


24.366 


619 


24.370 


24-374 


24.378 


24.382 


24.386 


24.390 


24-394 


24-398 


24.402 


24.405 


620 


24.409 


24-413 


24.417 


24.421 


24.425 


24-429 


24-433 


24-437 


24.441 


24-445 


621 


24.449 


24-453 


24-457 


24.461 


24.465 


24.468 


24-472 


24.476 


24.480 


24.484 


622 


24.488 


24.492 


24.496 


24.500 


24.504 


24-508 


24.512 


24.516 


24.520 


24.524 


623 


24.52S 


24-531 


24-535 


24539 


24-543 


24-547 


24-551 


24-555 


24-559 


24.563 


624 


24-567 


24-571 


24-575 


24-579 


24-583 


24-587 


24-591 


24-594 


24-598 


24.602 


625 


24.606 


24.610 


24.614 


24.618 


24.622 


24.626 


24-630 


24-634 


24.638 


24.642 


626 


24.646 


24.650 


24-653 


24.657 


24.661 


24-665 


24.669 


24-673 


24-677 


24.681 


627 


24.6S5 


24.689 


24-693 


24.697 


24.701 


24-705 


24.709 


24-713 


24.716 


24.720 


628 


24.724 


24.728 


24.732 


24-736 


24.740 


24.744 


24-748 


24-752 


24-756 


24.760 


629 


24.764 


24.768 


24.772 


24.776 


24.779 


24-783 


24.787 


24.791 


24-795 


24.799 


630 


24.803 


24.807 


24.811 


24.815 


24.819 


24.823 


24.827 


24.831 


24-835 


24.839 


631 


24.842 


24.846 


24.850 


24.854 


24-858 


24.862 


24.866 


24.870 


24-874 


24.878 


632 


24.882 


24.886 


24.S90 


24.894 


24.898 


24.902 


24-905 


24.909 


24-913 


24.917 


633 


24.921 


24.925 


24.929 


24.933 


24-937 


24.941 


24-945 


24.949 


24-953 


24.957 


634 


24.961 


24.965 


24.968 


24.972 


24-976 


24.980 


24.984 


24.988 


24.992 


24.996 


635 


25.000 


25.004 


25.008 


25.012 


25.016 


25.020 


25-024 


25.028 


25.031 


25-035 


636 


25-039 


25-043 


25-047 


25.051 


25-055 


25-059 


25.063 


25.067 


"25.071 


25-075 


637 


25.079 


25-083 


25.087 


25.091 


25.094 


25.098 


25.102 


25.106 


25.110 


25.114 


638 


25.118 


25.122 


25.126 


25-130 


25-134 


25-138 


25.142 


25.146 


25.150 


25.153 


639 


25-157 


25.161 


25-165 


25.169 


25-173 


25-177 


25.181 


25-185 


25.189 


25-193 


640 


25-197 


25.201 


25-205 


25.209 


25-213 


25.216 


25.220 


25-224 


25.228 


25.232 


641 


25.236 


25.240 


25-244 


25.248 


25-252 


25-256 


25.260 


25-264 


25.268 


25.272 


642 


25.276 


25.279 


25-283 


25.287 


25-291 


25-295 


25.299 


25-303 


25.307 


25.311 


643 


25-315 


25-319 


25-323 


25.327 


25-331 


25-335 


25-339 


25-342 


25.346 


25.350 


644 


25-354 


25-358 


25.362 


25.366 


25.370 


25-374 


25-378 


25-382 


25.386 


25.390 


645 


25-394 


25-398 


25.402 


25.405 


25.409 


25-4x3 


25-417 


25.421 


25.425 


25.429 


646 


25-433 


25-437 


25-441 


25.445 


25.449 


25-453 


25-457 


25.461 


25.465 


25.468 


647 


25-472 


25-476 


25.480 


25.484 


25.488 


25.492 


25-496 


25.500 


25.504 


25.508 


648 


25-512 


25-516 


25.520 


25.524 


25-528 


25-531 


25-535 


25539 


25-543 


25-547 


649 


25-551 


25-555 


25-559 


25.563 


25-567 


25-571 


25-575 


25-579 


25-583 


25.587 


650 


25-591 


25-594 


25.598 


25.602 


25.606 


25.610 


25.614 


25.618 


25.622 


25.626 



Smithsonian Tailes. 



28 



MILLIMETERS INTO INCHES. 

I mm. =0.03937 inch. 



Table 10, 



Milli- 
: meters. 


.0 


.1 


.2 


.3 


.4 


.5 .6 


.7 


.8 


.9 




Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


650 


25-591 


25-594 


25-598 


25.602 


25.606 


25.610 


25-614 


25.618 


25.622 


25.626 


651 


25.630 


25-634 


25.63S 


25.642 


25.646 


25-650 


25-653 


25-657 


25.661 


25-665 


652 


25.669 


25-673 


25.677 


25.681 


25-685 


25.689 


25-693 


25-697 


25.701 


25-705 


653 


25-709 


25-713 


25.716 


25.720 


25-724 


25-728 


25-732 


25.736 


25-740 


25-744 


1 654 


25- 74^ 


25-752 


25-756 


25-760 


25-764 


25.768 


25.772 


25-776 


25-779 


25-783 


i 655 


25-787 


25-791 


25-795 


25-799 


25-803 


25-807 


25.811 


25-815 


25.819 


25.823 


1 ^56 


25.827 


25-831 


25-835 


25-839 


25-842 


25-846 


25-850 


25-854 


25-858 


25.862 


657 


25.866 


25-870 


25-874 


25-878 


25.882 


25.886 


25.890 


25894 


25.89S 


25.902 


65S 


25-905 


25.909 


25-913 


25-917 


25.921 


25-925 


25-929 


25-933 


25-937 


25-941 


659 


25945 


25-949 


25-953 


25-957 


25.961 


25-965 


25.968 


25-972 


25-976 


25.980 


660 


25-984 


25-988 


25.992 


25.996 


26.000 


26.004 


26.O0S 


26.012 


26.016 


26.020 


661 


26.024 


26.028 


26.031 


26.035 


26.039 


26.043 


26.047 


26.051 


26.055 


26.059 


662 


26.063 


26.067 


26.071 


26.075 


26.079 


26.083 


26.087 


26.090 


26.094 


26.098 


663 


26.102 


26.106 


26.110 


26.114 


26.118 


26.122 


26.126 


26.130 


26.134 


26.138 


664 


26.142 


26.146 


26.150 


26.153 


26.157 


26.161 


26.165 


26.169 


26.173 


26.177 


665 


26.181 


26.185 


26.189 


26.193 


26.197 


26.201 


26.205 


26.209 


26.213 


26.216 


666 


26.220 


26.224 


26.228 


26.232 


26.236 


26. 240 


26.244 


26.248 


26.252 


26.256 ' 


667 


26.260 


26.264 


26.268 


26.272 


26.276 


26.279 


26.283 


26.2S7 


26.291 


26.295 ! 


668 


26.299 


26.303 


26.307 


26.311 


26.315 


26.319 


26.323 


26.327 


26.331 


26.335 


669 


26.339 


26.342 


26.346 


26.350 


26.354 


26.358 


26.362 


26.366 


26.370 


26.374 


670 


26.378 


26.382 


26.386 


26.390 


26.394 


26.398 


26.402 


26.405 


26.409 


26.413 


671 


26.417 


26.421 


26.425 


26.429 


26.433 


26.437 


26.441 


26.445 


26.449 


26.453 


672 


26.457 


26.461 


26.465 


26.468 


26.472 


26.476 


26.480 


26.484 


26.488 


26.492 


673 


26.496 


26.500 


26.504 


26.50S 


26.512 


26.516 


26.520 


26.524 


26.528 


26.531 


674 


26.535 


26.539 


26.543 


26.547 


26.551 


26.555 


26.559 


26.563 


26.567 


26.571 


675 


26.575 


26.579 


26.583 


26.587 


26.590 


26.594 


26.598 


26.602 


26.606 


26.610 


1 676 


26.614 


26.618 


26.622 


26.626 


26.630 


26.634 


26.638 


26.642 


26.646 


26.650 : 


677 


26.653 


26.657 


26.661 


26.665 


26.669 


26.673 


26.677 


26.681 


26.685 


26.689 


67S 


26.693 


26.697 


26.701 


26.705 


26.709 


26.713 


26.716 


26.720 


26.724 


26.728 


679 


26.732 


26.736 


26. 740 


26.744 


26.748 


26.752 


26.756 


26.760 


26.764 


26.768 


680 


26.772 


26.776 


26.779 


26.783 


26.787 


26.791 


26.795 


26799 


26.803 


26.807 1 


1 681 


26.811 


26.815 


26.819 


26.823 


26.827 


26.831 


26.835 


26.838 


26.842 


26.846 


1 682 


26.850 


26.854 


26.858 


26.862 


26.866 


26.870 


26.S74 


26.878 


26.882 


26. 886 1 


683 


26.890 


26.894 


26.898 


26.902 


26.905 


26.909 


26.913 


26.917 


26.921 


26.925 


6S4 


26.929 


26.933 


26.937 


26.941 


26.945 


26.949 


26.953 


26.957 


26.961 


26.965 1 


685 


26.968 


26.972 


26.976 


26.980 


26.984 


26.988 


26.992 


26.996 


27.000 


27.004 


686 


27.008 


27.012 


27.016 


27.020 


27.024 


27.028 


27.031 


27-035 


27.039 


27.043 


687 


27-047 


27.051 


27-055 


27-059 


27-063 


27.067 


27.071 


27-075 


27.079 


27.083 


688 


27.0S7 


27.090 


27.094 


27.098 


27.102 


27.106 


27.110 


27.114 


27.118 


27.122 


689 


27.126 


27.130 


27-134 


27.138 


27.142 


27.146 


27.150 


27.153 


27-157 


27.161 i 


690 


27.165 


27.169 


27.173 


27.177 


27.181 


27.185 


27.189 


27.193 


27.197 


27.201 


691 


27-205 


27.209 


27-213 


27.216 


27.220 


27.224 


27.228 


27.232 


27.236 


27.240 


692 


27-244 


27.248 


27.252 


27.256 


27.260 


27.264 


27.268 


27.272 


27.276 


27.279 


693 


27.283 


27.287 


■27.291 


27.295 


27-299 


27.303 


27.307 


27.311 


27-315 


27.319 


694 


27-323 


27.327 


27-33t 


27-335 


27-339 


27-342 


27.346 


27.350 


27-354 


27-.358 


695 


27.362 


27.366 


27.370 


27-374 


27.378 


27.382 


27.386 


27.390 


27-394 


27-398 


696 


27.402 


27-405 


27.409 


27-413 


27.417 


27.421 


27-425 


27-429 


27-433 


27-437 


697 


27.441 


27-445 


27-449 


27-453 


27-457 


27.461 


27.465 


27.468 


27-472 


27-476 


698 


27.480 


27.484 


27.488 


27-492 


27.496 


27.500 


27-504 


27.508 


27.512 


27.516 


699 


27.520 


27.524 27.528 

1 


27-531 


27-535 


27-539 


27-543 


27-547 


27-551 


27-555 


700 


27-559 


27.563 1 27.567 


27-571 


27-575 


27-579 


27-583 


27-5S7 


27.590 


27-594 



Smithsonian Tables. 



29 



Table 10. 



MILLIMETERS INTO INCHES. 

I mm. :=: 0.03937 inch. 



Milli- 
meters. 


.0 


.1 


.2 


.3 


.4 


.5 .6 


.7 


.8 


.9 




Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


700 


27-559 


27-563 


27-567 


27-571 


27-575 


27-579 


27-583 


27-587 


27-590 


27-594 


701 


27-598 


27.602 


27.606 


27.610 


27.614 


27.618 


27.622 


27.626 


27-630 


27-634 


702 


27.638 


27.642 


27.646 


27.650 


27-653 


27.657 


27.661 


27.665 


27.669 


27-673 


703 


27.677 


27.681 


27.685 


27.689 


27.693 


27.697 


27.701 


27.705 


27.709 


27-713 


704 


27.716 


27.720 


27.724 


27.728 


27.732 


27.736 


27.740 


27-744 


27.748 


27.752 


705 


27-756 


27.760 


27.764 


27.768 


27.772 


27.776 


27-779 


27.783 


27.787 


27.791 


706 


27-795 


27-799 


27.803 


27.807 


27.811 


27.815 


27.819 


27-823 


27.827 


27.831 


707 


27-835 


27-839 


27.842 


27.846 


27.850 


27-854 


27.858 


27.862 


27.S66 


27.870 


708 


27-874 


27.878 


27.882 


27.886 


27.890 


27-894 


27.898 


27.902 


27.905 


27.909 


709 


27.913 


27.917 


27.921 


27.925 


27.929 


27-933 


27.937 


27.941 


27-945 


27.949 


710 


27-953 


27-957 


27.961 


27-965 


27.968 


27.972 


27-976 


27.980 


27.984 


27.988 


711 


27.992 


27.996 


28. 000 


28.004 


28.008 


28.012 


28.016 


28.020 


28.024 


28.028 


712 


28.031 


28.035 


28.039 


28.043 


28.047 


28.051 


28.055 


28.059 


28.063 


28.067 


713 


28.071 


28.075 


28.079 


28.083 


28.087 


28.090 


28.094 


28.098 


28.102 


28.106 


714 


28.110 


28.114 


28.118 


28.122 


28.126 


28.130 


28.134 


28.138 


28.142 


28.146 


715 


28.150 


28.153 


28.157 


28.161 


28. 165 


28.169 


28.173 


28.177 


28.181 


28.185 


716 


28.189 


28. 193 


28.197 


28.201 


28. 205 


28.209 


28.213 


28.216 


28.220 


28.224 


717 


28.22S 


28.232 


28.236 


28.240 


28.244 


28.248 


28.252 


28.256 


28.260 


28.264 


718 


28.268 


28.272 


28.276 


28.279 


28.283 


28.287 


28.291 


28.295 


28.299 


28.303 


719 


28.307 


28.311 


28.315 


28.319 


28.323 


28.327 


28.331 


28.335 


28.339 


28.342 


720 


28.346 


28.350 


28.354 


28.358 


28.362 


28.366 


28.370 


28.374 


28.378 


28.382 


721 


28.386 


28.390 


28.394 


28.398 


28.402 


28.405 


28.409 


28.413 


28.417 


28.421 


722 


28.425 


28.429 


28.433 


28.437 


28.441 


28.445 


28.449 


28.453 


28.457 


28.461 


723 


28.465 


28.468 


28.472 


28.476 


28.480 


28.484 


28.488 


28.492 


28.496 


28.500 


724 


28.504 


28.508 


28.512 


28.516 


28.520 


2S.524 


28.528 


28.531 


28.535 


28. 539 


725 


28.543 


28.547 


28.551 


28.555 


28.559 


28.563 


2S.567 


28.571 


28.575 


28.579 


726 


28.583 


28.587 


28.590 


28.594 


28.598 


28.602 


28.606 


28.610 


28.614 


28.618 


727 


28.622 


28.626 


28.630 


28.634 


28.638 


28.642 


28.646 


28.650 


28.653 


28.657 


728 


2S.661 


28.665 


28.669 


28.673 


28.677 


2S.681 


28.6S5 


28.689 


28.693 


28.697 


729 


28.701 


28.705 


28.709 


28.713 


28.716 


28.720 


28.724 


28.728 


28.732 


28.736 


730 


28.740 


28.744 


28.748 


28.752 


28.756 


28.760 


28.764 


28.768 


28.772 


28.776 


731 


28.779 


28.783 


28.787 


28.791 


28.795 


28.799 


28.803 


2S.S07 


28.811 


28.815 


732 


28.819 


28.823 


28.827 


28.831 


28.835 


28.839 


28.842 


28.846 


28.850 


28. 854 


733 


28.858 


28.862 


28.866 


28.870 


28.874 


28.878 


28.882 


28.886 


28.S90 


28.894 


734 


28.898 


28.902 


28.905 


28.909 


28.913 


28.917 


28.921 


28.925 


28.929 


28.933 


735 


2S.937 


28.941 


28.945 


28.949 


28.953 


28.957 


28.961 


28.965 


28.968 


28.972 


736 


28.976 


28.980 


28.984 


28.988 


28.992 


28.996 


29.000 


29.004 


29.008 


29.012 


737 


29.016 


29.020 


29.024 


29.028 


29.031 


29-035 


29.039 


29-043 


29.047 


29.051 


738 


29-055 


29.059 


29.063 


29.067 


29.071 


29.075 


29.079 


29.083 


29.087 


29.090 


739 


29.094 


29.098 


29.102 


29.106 


29.110 


29.114 


29.118 


29.122 


29.126 


29.130 


740 


29- 134 


29.13S 


29.142 


29.146 


29.150 


29-153 


29-157 


29.161 


29.165 


29.169 


741 


29.173 


29.177 


29.181 


29.185 


29.189 


29.193 


29.197 


29.201 


29-205 


29.209 


742 


29.213 


29.216 


29.220 


29.224 


29.228 


29.232 


29.236 


29.240 


29-244 


29.248 
29.287 


743 


29.252 


29.256 


29.260 


29.264 


29.268 


29.272 


29.276 


29.279 


29-283 


744 


29.291 


29.295 


29.299 


29.303 


29.307 


29.311 


29-315 


29.319 


29-323 


29-327 


745 


29-331 


29-335 


29-339 


29.342 


29-346 


29-350 


29-354 


29-358 


29-362 


29-366 


746 


29.370 


29-374 


29.378 


29.382 


29.386 


29.390 


29-394 


29.398 


29.402 


29-405 


747 


29.409 


29-413 


29.417 


29.421 


29-425 


29.429 


29-433 


29-437 


29.441 


29-445 


748 


29.449 


29-453 


29-457 


29.461 


29-465 


29.468 


29.472 


29.476 


29.480 


29.484 


749 


29.488 


29.492 


29.496 


29.500 


29-504 


29-508 


29.512 


29-516 


29.520 


29-524 


750 


29.528 


29-531 


29-535 


29-539 


29-543 


29-547 


29551 


29-555 


29-559 


29-563 



Smithsonian Table*. 



30 



Table 10. 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Milli- 
meters 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


750 


29.528 


29-531 


29-535 


29-539 


29-543 


29-547 


29-551 


29555 


29.559 


29563 


751 


29-567 


29-571 


29-575 


29-579 


29-583 


29-587 


29.590 


29-594 


29.598 


29.602 


752 


29.606 


29.610 


29.614 


29.618 


29.622 


29.626 


29.630 


29634 


29.638 


29.642 


753 


29.646 


29.650 


29-653 


29.657 


29.661 


29.665 


29.669 


29.673 


29.677 


29.681 


754 


29-685 


29.689 


29.693 


29.697 


29.701 


29-705 


29.709 


29.713 


29.716 


29.720 


755 


29.724 


29.728 


29.732 


29.736 


29.740 


29-744 


29.748 


29-752 


29-756 


29.760 ' 


756 


29-764 


29.768 


29.772 


29.776 


29-779 


29-783 


29-787 


29.791 


29-795 


29.799 


757 


29.803 


29.807 


29.811 


29.815 


29.819 


29.823 


29.827 


29.831 


29-835 


29-839 


758 


29.842 


29.846 


29 850 


29.854 


29-858 


29.862 


29.866 


29.870 


29.874 


29.878 


759 


29.882 


29.886 


29.890 


29.894 


29.898 


29.902 


29-905 


29.909 


29-913 


29-917 


760 


29.921 


29.925 


29.929 


29-933 


29-937 


29-941 


29-945 


29-949 


29-953 


29-957 


761 


29.961 


29.965 


29.968 


29.972 


29.976 


29.980 


29-984 


29.988 


29.992 


29.996 


762 


30.000 


30.004 


30.008 


30.012 


30.016 


30.020 


30.024 


30.027 


30.031 


30.035 


763 


30-039 


30.043 


30.047 


30.051 


30.055 


30.059 


30.063 


30.067 


30.071 


30.075 


764 


30.079 


30.083 


30.087 


30.090 


30.094 


30.098 


30. 102 


30. 106 


30.110 


30.114 


765 


30.118 


30.122 


30.126 


30.130 


30.134 


30.138 


30.142 


30.146 


30. 150 


30.153 


766 


30.157 


30.161 


30.165 


30.169 


30.173 


30.177 


30.181 


30.185 


30.189 


30.193 


767 


30. 197 


30.201 


30.205 


30. 209 


30.213 


30.216 


30.220 


30.224 


30.228 


30.232 


768 


30.236 


30.240 


30.244 


30.248 


30.252 


30.256 


30.260 


30.264 


30.268 


30.272 


769 


30.276 


30.279 


30.283 


30.287 


30.291 


30.295 


30.299 


30.303 


30.307 


30.311 


770 


30.315 


30.319 


30.323 


30.327 


30.331 


30.335 


30.339 


30.342 


30.346 


30.350 


771 


30.354 


30.358 


30.362 


30.366 


30.370 


30.374 


30.378 


30.382 


30.386 


30.390 


772 


30.394 


30.398 


30.402 


30.405 


30.409 


30.413 


30.417 


30.421 


30.425 


30.429 


773 


30.433 


30.437 


30.441 


30.445 


30.449 


30.453 


30.457 


30.461 


30.465 


30.468 


774 


30.472 


30.476 


30.480 


30.484 


30.488 


30.492 


30.496 


30.500 


30.504 


30.508 


775 


30.512 


30.516 


30,520 


30.524 


30.528 


30.531 


30.535 


30.539 


30.543 


30.547 


776 


30.551 


30.555 


30.559 


30.563 


30.567 


30.571 


30.575 


30.579 


30.583 


30.587 


777 


30.590 


30.594 


30.598 


30.602 


30.606 


30.610 


30.614 


30.618 


30.622 


30.626 


778 


30.630 


30.634 


30.638 


30.642 


30.646 


30.650 


30.653 


30.657 


30.661 


30.665 


779 


30.669 


30.673 


30.677 


30.681 


30.685 


30.689 


30.693 


30.697 


30.701 


30.705 


780 


30.709 


30.713 


30.716 


30.720 


30.724 


30.728 


30.732 


30.736 


30.740 


30.744 


781 


30.748 


30.752 


30.756 


30.760 


30.764 


30.768 


30.772 


30.776 


30.779 


30.783 


782 


30.787 


30.791 


30.795 


30.799 


30.803 


30.807 


30.811 


30.815 


30.819 


30.823 


783 


30.827 


30.831 


30.835 


30.839 


30.842 


30.846 


30.850 


30.854 


30.858 


30.862 


784 


30.866 


30.870 


30.874 


30.878 


30.882 


30.8S6 


30.890 


30.894 


30.898 


30.902 


785 


30.905 


30.909 


30.913 


30.917 


30.921 


30.925 


30.929 


30.933 


30.937 


30.941 


786 


30.945 


30.949 


30.953 


30.957 


30.961 


30.965 


30.968 


30.972 


30.976 


30.980 


787 


30.984 


30.988 


30.992 


30.996 


31.000 


31-004 


31.008 


31.012 


31.016 


31.020 


788 


31.024 


31.027 


31.031 


31.035 


31.039 


31-043 


31-047 


31.051 


31-055 


31-059 


789 


31-063 


31-067 


31.071 


31-075 


31.079 


31-083 


31.087 


31.090 


31094 


31.098 


790 


31.102 


31.106 


31.IIO 


31. 114 


31-118 


31.122 


31.126 


31-130 


31-134 


31-138 


791 


31.142 


31.146 


31-150 


31-153 


31-157 


31-161 


31-165 


31.169 


31-173 


31-177 


1 792 


31.181 


31-185 


31.189 


31-193 


31-197 


31.201 


31-205 


31-209 


31.213 


31.216 


793 


31.220 


31.224 


31.228 


31.232 


31.236 


31-240 


31-244 


31.248 


31.252 


31.256 


794 


31.260 


31.264 


31.268 


31.272 


31-276 


31-279 


31-283 


31-287 


31.291 


31-295 


i 795 


31.299 


31-303 


31-307 


31. 3" 


31-315 


31-319 


31.323 


31-327 


31-331 


31-335 


796 


31-339 


31.342 


31.346 


31-350 


31-354 


31-358 


31-362 


31-366 


31-370 


31-374 


797 


31-378 


31.382 


31.380 


31-390 


31-394 


31-398 


31-402 


31.405 


31-409 


31-413 


798 


31-417 


31.421 


31.425 


31-429 


31-433 


31-437 


31-441 


31-445 


31-449 


31-453 


799 


31-457 


31.461 


31-465 


31.46S 


31-472 


31-476 


31-480 


31.484 


31.488 


31-492 


800 


31-496 


31-500 


31-504 


31-508 


31-512 


31-516 


31-520 


31-524 


31.527 


31-531 



SMirHSONiAN Tables. 



31 



Table 10. 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Milli- 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


meters, 
























Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. | 


1 800 


31-496 


31-500 


31-504 


31-508 


31.512 


31-516 


31-520 


31-524 


31-527 


31.531 


801 


31-535 


31-539 


3 1 -.543 


31.547 


31.551 


31-555 


31-559 


31-563 


31-567 


31-571 


S02 


31-575 


31-579 


31.583 


31-587 


31-590 


31-594 


31-598 


31.602 


31.606 


31.610 


803 


31.614 


31.618 


31.622 


31.626 


31.630 


31-634 


31-638 


31.642 


31.646 


31-650 


804 


31-653 


31-657 


31.661 


31-665 


31.669 


31-673 


31-677 


31.681 


3I-6S5 


31.689 


805 


31-693 


31.697 


31.701 


31-705 


31.709 


31-713 


31.716 


31.720 


31.724 


31.728 


806 


31-732 


31-736 


31.740 


31-744 


31-748 


31-752 


31-756 


31.760 


31.764 


31.768 


807 


31.772 


31-776 


31.779 


31-783 


31-787 


31-791 


31-795 


31-799 


31-803 


31.807 


808 


31.811 


31-815 


31.819 


31-823 


31.827 


31-831 


31-835 


31.839 


31.842 


31.846 


809 


31-850 


31-854 


31-858 


31.862 


31.866 


31.870 


31-874 


31.878 


31.8S2 


31.886 


810 


31-890 


31-894 


3 1. 898 


31.902 


31-905 


31.909 


31-913 


31-917 


31.921 


31-925 


811 


31.929 


31-933 


31.937 


31-941 


31-945 


31.949 


31-953 


31-957 


31.961 


31-965 


812 


31.968 


31.972 


31.976 


31-980 


3I-9S4 


31.988 


31.992 


31.996 


32.000 


32.004 


813 


32.008 


32.012 


32.016 


32.020 


32.024 


32.027 


32.031 


32.035 


32.039 


32.043 


814 


32.047 


32.051 


32.055 


32.059 


32.063 


32.067 


32.071 


32.075 


32.079 


32.083 


815 


32.0S7 


32.090 


32.094 


32.098 


32.102 


32.106 


32.110 


32.114 


32.118 


32.122 


816 


32.126 


32.130 


32.134 


32.138 


32.142 


32.146 


32.150 


32.153 


32.157 


32.161 


817 


32.165 


32.169 


32-173 


32.177 


32.1S1 


32-185 


32.189 


32.193 


32.197 


32.201 


818 


32.205 


32.209 


32-213 


32.216 


32.220 


32.224 


32.228 


32.232 


32.236 


32.240 


819 


32.244 


32.248 


32.252 


32.256 


32.260 


32.264 


32.268 


32.272 


32.276 


32.279 


820 


32.2S3 


32.287 


32.291 


32.295 


32.299 


32.303 


32.307 


32.311 


32.315 


32.319 


821 


32-323 


32.327 


32.331 


32.335 


32-339 


32.342 


32.346 


32.350 


32.354 


32.358 


822 


32.362 


32.366 


32.370 


32.374 


32.378 


32.382 


32.3S6 


32.390 


32.394 


32.398 


823 


32.402 


32.405 


32.409 


32.413 


32.417 


32.421 


32.425 


32.429 


32.433 


32.437 1 


824 


32.441 


32.445 


32.449 


32.453 


32.457 


32.461 


32.465 


32.468 


32.472 


32.476 


825 


32.480 


32.484 


32.488 


32.492 


32.496 


32.500 


32.504 


32.50S 


32-512 


32.516 


826 


32.520 


32.524 


32.527 


32.531 


32.535 


32.539 


32.543 


32.547 


32.551 


32.555 


827 


32.559 


32.563 


32.567 


32.571 


32.575 


32.579 


32.583 


32.587 


32.590 


32.594 1 


828 


32.598 


32.602 


32.606 


32.610 


32.614 


32.618 


32.622 


32.626 


32.630 


32.634 1 


829 


32.638 


32.642 


32.646 


32.650 


32.653 


32.657 


32.661 


32.665 


32.669 


32.673 


830 


32.677 


32.681 


32.685 


32.6S9 


32.693 


32.697 


32.701 


32.705 


32.709 


32.713 


831 


32.716 


32.720 


32.724 


32.728 


32.732 


32.736 


32.740 


32.744 


32.748 


32.752 1 


832 


32.756 


32-760 


32.764 


32.768 


32-772 


32.776 


32.779 


32.783 


32.787 


32.791 


833 


32.795 


32-799 


32.803 


32.807 


32-811 


32.815 


32.819 


32.823 


32.827 


32.831 


834 


32.835 


32.839 


32.842 


32.846 


32.S50 


32.854 


32.858 


32.862 


32.S66 


32.870 


835 


32.874 


32.87S 


32.882 


32.886 


32.890 


32.894 


32.898 


32.902 


32.905 


32.909 


836 


32.913 


32.917 


32.921 


32.925 


32.929 


32.933 


32.937 


32.941 


32.945 


32.949 


837 


32.953 


32.957 


32.961 


32.965 


32.968 


32.972 


32.976 


32.980 


32.984 


32.988 


838 


32.992 


32.996 


33.000 


33-004 


33.008 


33.012 


33.016 


33.020 


33-024 


33-027 


839 


33.031 


33.035 


33-039 


33-043 


33-047 


33-051 


33-055 


33-059 


33-063 


33.067 


840 


33-071 


33-075 


33-079 


33-083 


33.087 


33.090 


33-094 


33-098 


33.102 


33.106 


841 


33- ^^0 


33.114 


33-118 


33.122 


33-126 


33.130 


33-134 


33.138 


33-142 


33.146 


S42 


33.150 


33-153 


33.157 


33.161 


33-165 


33.169 


33.173 


33-177 


.33-181 


33-185 


843 


33.189 


33.193 


33-197 


33.201 


33.205 


33.209 


33.213 


33.216 


33.220 


33-224 


844 


33.228 


33.232 


33-236 


33-240 


33.244 


33.248 


33.252 


33-256 


33-260 j 33.264 1 


845 


33.268 


33.272 


33.276 


33-279 


33.283 


33.287 


33.291 


33-295 


33-299 


33-303 


846 


33.307 


33.311 


33-315 


33.319 


33.323 


33-327 


33-331 


33-335 


33-339 


33-342 


847 


33.346 


33.350 


33-354 


33.358 


33-362 


33.366 


33-370 


33-374 


33.378 


33-382 


848 


33.386 


33.390 


33-394 


33-398 


33-402 


33.405 


33-409 


33-413 


33.417 


33.421 


849 


33-425 


33-429 


33-433 


33-437 


33-441 


33-445 


33-449 


33-453 


33-457 


33.461 


850 


33-464 


33-468 


33-472 


33.476 


33-480 


33-484 


33.488 


33-492 


33-496 


33-500 



Smithsonian Tables. 



32 



Table lo. 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Milli- 
meters. 

1 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 

1 


1 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


850 


33-464 


33-46S 


33-472 


33-476 


33-480 


33-484 


33-488 


33-492 


33-496 


33-500 1 


85 1 


33-504 


33-50S 


33-512 


33-516 


33-520 


33-524 


33-527 


33-531 


33-535 


33-539 1 


852 


33-543 


33-547 


33-551 


33-555 


33-559 


33-563 


33-567 


33-571 


33-575 


33-579 \ 


853 


33-583 


33-587 


33-590 


33-594 


33-598 


33.602 


33.606 


33-610 


33-614 


33-618 j 


854 


33.622 


33.626 


33-630 


33-634 


33-638 


33-642 


33-646 


33-650 


33-653 


33-657 


855 


33-661 


33-665 


33-669 


33-673 


33-677 


33-681 


33-685 


33-689 


33-693 


33-697 


856 


33-701 


33-705 


33-709 


33-713 


33-716 


33-720 


33-724 


33-728 


33-732 


33-736 


857 


33-740 


33-744 


33-748 


33-752 


33-756 


33-760 


33-764 


33-768 


33-772 


33-776 


858 


33-779 


33-783 


33-787 


33-791 


33-795 


33-799 


33-803 


33-807 


33-811 


33-815 


859 


33-819 


33-823 


33-827 


33-831 


33-835 


33-839 


33-842 


33-846 


33-850 


33.854 


860 


33-858 


33-862 


33.866 


33-870 


33-874 


33-878 


33.882 


33-886 


33-890 


33-894 1 


861 


33-89S 


33-902 


33-905 


33-909 


33-913 


33-917 


33-921 


33-925 


33-929 


33-933 


S62 


33-937 


33-941 


33-945 


33-949 


33-953 


33-957 


33-961 


33-964 


33-968 


33-972 


863 


33-976 


33-980 


33-984 


33-988 


33-992 


33-996 


34.000 


34.004 


34.008 


34.012 


864 


34.016 


34.020 


34.024 


34.027 


34-031 


34-035 


34-039 


34-043 


34-047 


34-051 


865 


34-055 


34.059 


34-063 


34.067 


34-071 


34-075 


34-079 


34-083 


34-087 


34.090 


866 


34-094 


34-098 


34.102 


34.106 


34.110 


34-114 


34.118 


34.122 


34.126 


34-130 


867 


34-134 


34-138 


34-142 


34.146 


34-150 


34-153 


34-157 


34.161 


34-165 


34.169 


868 


34-173 


34.177 


34.181 


34-185 


34-189 


34-193 


34-197 


34.201 


34-205 


34.209 


869 


34-213 


34.216 


34.220 


34-224 


34-228 


34-232 


34-236 


34.240 


34-244 


34-248 


870 


34-252 


34-256 


34.260 


34.264 


34.268 


34-272 


34-276 


34-279 


34-283 


34-287 


871 


34-291 


34-295 


34-299 


34-303 


34-307 


34-311 


34-315 


34-319 


34-323 


34-327 


872 


34-331 


34-335 


34-339 


34-342 


34-346 


34-350 


34-354 


34-358 


34-362 


34-366 


873 


34-370 


34-374 


34-378 


34-382 


34-386 


34-390 


34-394 


34-398 


34.402 


34-405 


874 


34-409 


34.413 


34-417 


34-421 


34-425 


34-429 


34-433 


34-437 


34-441 


34-445 


875 


34-449 


34.453 


34-457 


34.461 


34.464 


24.468 


34-472 


34-476 


34.480 


34-484 


876 


34.4S8 


34-492 


34-496 


34-500 


34-504 


34-508 


34-512 


34-516 


34-520 


34-524 


877 


34-527 


34-531 


34-535 


34-539 


34-543 


34-547 


34-551 


34-555 


34-559 


34-563 


878 


34-567 


34-571 


34-575 


34-579 


34-583 


34-587 


34-590 


34-594 


34-598 


34-602 


879 


34.606 


34.610 


34.614 


34.618 


34.622 


34.626 


34-630 


34-634 


34-638 


34-642 


880 


34.646 


34-650 


34-653 


34-657 


34.661 


34-665 


34-669 


34-673 


34-677 


34-681 


88 1 


34-685 


34-689 


34-693 


34-697 


34-701 


34-705 


34-709 


34-713 


34-716 


34-720 


882 


34-724 


34-728 


34-732 


34-736 


34-740 


34-744 


34-748 


34-752 


34-756 


34-760 


883 


34-764 


34.768 


34-772 


34-776 


34-779 


34-783 


34-787 


34-791 


34-795 


34-799 


8S4 


34-803 


34.807 


34-8x1 


34-815 


34-819 


34.823 


34-827 


34-831 


34-835 


34.839 


885 


34.842 


34.846 


34-850 


34-S54 


34-858 


34.862 


34.866 


34-870 


34-874 


34.878 


886 


34.882 


34.886 


34.890 


34-894 


34-898 


34.902 


34-905 


34-909 


34-913 


34.917 


887 


34-921 


34-925 


34-929 


34-933 


34-937 


34-941 


34-945 


34-949 


34-953 


34.957 


888 


34-961 


34-964 


34-968 


34-972 


34-976 


34.980 


34-984 


34-988 


34-992 


34-996 


S89 


35.000 


35-004 


35.008 


35-012 


35-016 


35.020 


35-024 


35-027 


35-031 


35-035 


890 


35-039 


35-043 


35-047 


35-051 


35-055 


35-059 


35-063 


35-067 


35-071 


35-075 


891 


35-079 


35-083 


35-087 


35-090 


35-094 


35-098 


35-102 


35-106 


35.110 


35-114 


892 


35-II8 


35-122 


35-126 


35-130 


35-134 


35-138 


35-142 


35-146 


35-150 


35-153 


893 


35-157 


35- 161 


35-165 


35-169 


35-173 


35-177 


35-181 


35-185 


35-189 


35-193 


894 


35.197 


35-20I 


35-205 


35-209 


35-213 


35-216 


35-220 


35-224 


35-228 


35-232 


895 


35-236 


35-240 


35-244 


35-248 


35-252 


35-256 


35-260 


35-264 


35-268 


35-272 


896 


35-276 


35-279 


35-283 


35-287 


35-291 


35-295 


35-299 


35-303 


35-307 


35-311 


897 


35-315 


35.319 


35-323 


35-327 


35-331 


35-335 


35-339 


35-342 


35-346 


35-350 


898 


35-354 


35-358 


35-362 


35-366 


35-370 


35-374 


35-378 


35-382 


35-386 


35-390 


899 


35-394 


35-398 


35-402 


35-405 


35-409 


35-413 


35-417 


35-421 


35-425 


35.429 


900 


35-433 


35-437 


35-441 


35-445 


35-449 


35-453 


35-457 


35-461 


35-464 


35-468 



Smithsonian Tables. 



33 



Table 1 0. 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Milli- 
meters. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


900 


35-433 


35-437 


35.441 


35.445 


35.449 


35-453 


35-457 


35-461 


35.464 


35-468 


901 


35-472 


35-476 


35.480 


35.484 


35-488 


35.492 


35.496 


35.500 


35-504 


35-508 


902 


35-512 


35.516 


35.520 


35-524 


35-527 


35-531 


35.535 


35-539 


35-543 


35-547 


903 


35-551 


35-555 


35-559 


35-563 


35-567 


35-571 


35-575 


35-579 


35-583 


35-587 


904 


35-590 


35.594 


35-598 


35-602 


35-606 


35-6IO 


35.614 


35-618 


35-622 


35-626 


905 


35-630 


35-634 


35-638 


35-642 


35-646 


35-650 


35.653 


35-657 


35-661 


35-665 


906 


35-669 


35-673 


35-677 


35-681 


35-685 


35-689 


35.693 


35-697 


35-701 


35-705 


907 


35-709 


35-713 


35-716 


35-720 


35-724 


35-728 


35-732 


35-736 


35-740 


35-744 i 


908 


35-74S 


.35.752 


35.756 


35-760 


35-764 


35-768 


35.772 


35-776 


35-779 


35-783 


909 


35-7^7 


35.791 


35-795 


35-799 


35-803 


35-807 


35.811 


35.815 


35-819 


35-823 


910 


35-827 


35-831 


35-835 


35.839 


35-842 


35-846 


35.850 


35.854 


35-858 


35.862 


911 


35-866 


35.870 


35-874 


35.87S 


35-882 


35.886 


35.890 


35.894 


35-898 


35.902 


912 


35-905 


35-909 


35-913 


35-917 


35-921 


35.925 


35.929 


35.933 


35-937 


35-941 


9^3 


35-945 


35-949 


35-953 


35-957 


35-961 


35.964 


35-968 


35-972 


35-976 


35-980 


914 


35-984 


35-988 


35-992 


35-996 


36.000 


36.004 


36.008 


36.012 


36.016 


36.020 


915 


36.024 


36.027 


36.031 


36.035 


36.039 


36.043 


36.047 


36.051 


36.055 


36-059 


916 


36.063 


36.067 


36.071 


36.075 


36.079 


36.083 


36.087 


36.090 


36.094 


36.098 


1 917 


36. 102 


36.106 


36.110 


36.114 


36.118 


36.122 


36.126 


36.130 


36.134 


36.138 


918 


36.142 


36- 146 


36.150 


36.153 


36.157 


36.161 


36.165 


36.169 


36.173 


36.177 


919 


36.181 


36.185 


36.189 


36.193 


36.197 


36.201 


36.205 


36.209 


36.213 


36.216 


920 


36.220 


36.224 


36,228 


36.232 


36.236 


36.240 


36.244 


36.24S 


36.252 


36.256 


921 


36.260 


36.264 


36.26S 


36.272 


36.276 


36.279 


36.283 


36.2S7 


36.291 


36.295 


922 


36.299 


36-303 


36.307 


36.311 


36.315 


36.319 


36-323 


36.327 


36.331 


36.335 


923 


36.339 


36.342 


36.346 


36.350 


36.354 


36.358 


36.362 


36.366 


36.370 


36.374 


924 


36.378 


36.382 


36.386 


36.390 


36.394 


36.398 


36.402 


36.405 


36.409 


36.413 


925 


36.417 


36.421 


36.425 


36.429 


36.433 


36.437 


36.441 


36.445 


36.449 


36.453 


926 


36.457 


36.461 


36.464 


36.468 


36.472 


36.476 


36.480 


36.484 


36.488 


36.492 


927 


36.496 


36.500 


36.504 


36.508 


.^.6.512 


36.516 


36.520 


36.524 


36.527 


36.531 


928 


36.535 


36-539 


36.543 


36.547 


36.551 


36.555 


36.559 


36.563 


36.567 


36.571 


929 


36.575 


36.579 


36.583 


36.5S7 


36.590 


36.594 


36.598 


36.602 


36.606 


36.610 


930 


36.614 


36.618 


36.622 


36.626 


36.630 


36.634 


36.638 


36.642 


36.646 


36.650 


931 


36.653 


36.657 


36.661 


36.665 


36.669 


36.673 


36.677 


36.681 


36.685 


36.689 


932 


36.693 


36.697 


36.701 


36.705 


36.709 


36.713 


36.716 


36.720 


36.724 


36.728 


933 


36.732 


36.736 


36.740 


36.744 


36.748 


36.752 


36.756 


36.760 


36.764 


36.768 


934 


36.772 


36.776 


36.779 


36.783 


36.787 


36.791 


36.795 


36.799 


36.803 


36.807 


935 


36.811 36.815 


36.819 


36.823 


36.827 


36.831 


36.835 


36.839 


36.842 


36.846 


936 


36.850 


36.854 


36.85S 


36.862 


36.866 


36.870 


36.874 


36.878 


36.882 


36. 886 


937 


36.890 


36.894 


36.898 


36.902 


36.905 


36.909 


36.913 


36.917 


36.921 


36.925 


938 


36.929 


36.933 


36.937 


36.941 


36.945 


36.949 


36.953 


36.957 


36.961 


36.964 


939 


36.968 


36.972 


36.976 


36.980 


36.984 


36.988 


36.992 


36.996 


37.000 


37,004 


940 


37.008 


37.012 


37.016 


37.020 


37.024 


37.027 


37.031 


37-035 


37-039 


37.043 


941 


37-047 


37.051 


37.055 


37-059 


37.063 


37.067 


37.071 


37.075 


37.079 


37.083 


942 


37.087 


37-090 


37.094 


37.098 


37.102 


37.106 


37.110 


37.114 


37.118 


37.122 


943 


37.126 


37.130 


37.134 


37.138 


37.142 


37.146 


37.150 


37- 153 


37-157 


37.161 


944 


37-165 


37-169 


37.173 


37.177 


37.181 


37.185 


37-189 


37.193 


37-197 


37.201 


945 


37-204 


37.208 


37.212 


37-216 


37.220 


37.224 


37.228 


37.232 


37-236 


37.240 


946 


37-244 


37-248 


37.252 


37-256 


37-260 


37.264 


37.268 


37.272 


37-276 


37-279 


947 


37.283 


37-287 


37.291 


37-295 


37.299 


37.303 


37.307 


37.311 


37-315 


37-319 


948 


37-323 


37-327 


37.331 


37-335 


37-339 


37-342 


37.346 


37-350 


37-354 


37-.358 


949 


37.362 


37.366 


37.370 


37-374 


37-378 


37-382 


37-386 


37-390 


37-394 


37-398 


950 


37.402 


37.405 


37.409 


37-413 


37-417 


37-421 


37-425 


37-429 


37-433 


37-437 



Bmithsonian Tables. 



34 



MILLIMETERS INTO INCHES. 

I mm. = 0.03937 inch. 



Table 1 O. 



Milli- 
meters. 


.0 


.1 


.2 


.3 .4 


.5 


.6 


.7 


.8 


.9 




Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inche.o. 


Inches. ! 


950 


37-402 


37-405 


37-409 


37-413 


37.417 


37.421 


37-425 


37-429 


37-433 


37.437 i 


951 


37-441 


37-445 


37-449 


37-453 


37-457 


37.461 


37-464 


37-468 


37-472 


37.476 


952 


37.480 


37-484 


37-488 


37-492 


37-496 


37.500 


37.504 


37-508 


37.512 


37-516 


953 


37-520 


37-524 


37-527 


37-531 


37.535 


37.539 


37-543 


37.547 


37-551 


37-555 


954 


37-559 


37-563 


37-567 


37.571 


37-575 


37.579 


37.583 


37.587 


37-590 


37-594 


955 


37-598 


37.602 


37.606 


37.610 


37.614 


37.618 


37-622 


37.626 


37-630 


37.634 


956 


37-638 


37-642 


37-646 


37-650 


37.653 


37.657 


37-661 


37.665 


37-669 


37.673 


957 


37-677 


37-681 


37-685 


37.689 


37.693 


37.697 


37-701 


37.705 


37-709 


37.713 


958 


37-716 


37.720 


37-724 


37.728 


37.732 


37.736 


37-740 


37-744 


37-748 


37.752 


959 


37-756 


37.760 


37-764 


37.768 


37.772 


37.776 


37-779 


37-783 


37-787 


37.791 


960 


37-795 


37-799 


37-803 


37.807 


37.811 


37.815 


37-819 


37-823 


37-827 


37.831 


961 


37-835 


37-839 


37-S42 


37.846 


37-850 


37.854 


37-858 


37.862 


37-866 


37.870 


962 


37-874 


37-878 


37-882 


37.886 


37.890 


37.894 


37-898 


37.901 


37-905 


37.909 


963 


37-913 


37-917 


37.921 


37.925 


37-929 


37.933 


37-937 


37-941 


37-945 


37.949 


964 


37-953 


37-957 


37-961 


37-964 


37-968 


37.972 


37-976 


37-980 


37-984 


37.988 


965 


37.992 


37-996 


38.000 


38.004 


38.008 


38.012 


38.016 


38.020 


38.024 


38.027 


966 


38.031 


38.035 


38.039 


38.043 


38-047 


38.051 


38-055 


38.059 


38.063 


38.067 


967 


38.071 


3S.075 


3S.079 


38.083 


38.087 


38.090 


38.094 


38.098 


38.102 


38.106 


968 


38.110 


38.114 


38.IIS 


38.122 


38.126 


38.130 


38.134 


38.138 


38.142 


38.146 


969 


38.150 


38.153 


38.157 


38.161 


38.165 


38.169 


38.173 


38.177 


38.181 


38-185 


970 


38.189 


38.193 


38.197 


38.201 


38.205 


38.209 


38.213 


38.216 


38.220 


38-224 


971 


38.228 


38.232 


38.236 


38.240 


38.244 


38.248 


38.252 


38.256 


38.260 


38.264 


972 


38.268 


38.272 


38.276 


38.279 


38.283 


38.287 


38. 291 


38-295 


38.299 


38-303 


973 


38.307 


38.311 


38.315 


38.319 


38.323 


38.327 


38.331 


38-335 


38.339 


38.342 


974 


38.346 


38.350 


38.354 


38-358 


38.362 


38.366 


38-370 


38-374 


38-378 


38.382 


975 


38.386 


38.390 


38.394 


38.398 


38.401 


38.405 


38.409 


38-413 


38-417 


38.421 


976 


38-425 


38.429 


38.433 


38.437 


38.441 


38.445 


38.449 


38-453 


38-457 


38.461 


977 


38.464 


38.468 


38.472 


38-476 


38.480 


38.484 


38.488 


38-492 


38-496 


38.500 


978 


38-504 


38.508 


38.512 


38.516 


38.520 


38.524 


38.527 


38.531 


38-535 


38.539 


979 


38-543 


38.547 


38.551 


38-555 


38.559 


38.563 


38.567 


38.571 


38.575 


38-579 


980 


38.583 


38-587 


38.590 


38-594 


38-598 


38.602 


38.606 


38.610 


38.614 


38.618 


981 


38.622 


38.626 


38.630 


38-634 


38.638 


38.642 


38.646 


38- 650 


38.653 


38.657 


9S2 


38.661 


38.665 


38.669 


38.673 


38.677 


38.6S1 


38.685 


38.689 


38.693 


38.697 


983 


38.701 


38.705 


38.709 


38-713 


38.716 


38.720 


38.724 


38.728 


38.732 


38.736 


984 


38.740 


38.744 


38-748 


38.752 


38.756 


38-760 


38.764 


38.768 


38-772 


38.776 


985 


38-780 


38.783 


38.787 


38-791 


38-795 


38-799 


38.803 


38.807 


38.811 


38.815 


986 


38-819 


38.823 


38.827 


38.831 


38-835 


38839 


38.842 


38.846 


38.850 


38.854 


987 


38.858 


38.862 


38.866 


38.870 


38-874 


38.878 


38.882 


38. 886 


38.890 


38.894 


988 


38.898 


38.901 


38.905 


38.909 


38-913 


38.917 


38.921 


38.925 


38.929 


38.933 


989 


38-937 


38.941 


38.945 


38.949 


38.953 


38.957 


38.961 


38.964 


38.968 


38.972 


990 


38-976 


38.980 


38.984 


38.988 


38.992 


38.996 


39.000 


39.004 


39-008 


39.012 


991 


39.016 


39.020 


39-024 


39-027 


39-031 


39-035 


39-039 


39.043 


39-047 


39-051 


992 


39-055 


39-059 


39-063 


39-067 


39.071 


39-075 


39.079 


39.083 


39.087 


39.090 


993 


39094 


39-098 


39.102 


39.106 


39.110 


39-114 


39.118 


39.122 


39.126 


39-130 


994 


39-134 


39-138 


39-142 


39-146 


39-150 


39-153 


39-157 


39.161 


39-165 


39-169 


995 


39-173 


39-177 


39.181 


39.185 


39-189 


39- 193 


39-197 


39.201 


39-205 


39-209 


996 


39-213 


39.216 


39.220 


39.224 


39.228 


39.232 


39-236 


39.240 


39-244 


39-248 


997 


39-252 


39-256 


39.260 


39.264 


39.26S 


39-272 


39.276 


39.279 


39-2S3 


39-287 


998 


39.291 


39-295 


39.299 


39-303 


39-307 


39-311 


39-315 


39-319 


39.323 


39.327 


999 


39-331 


39-335 


39-339 


39-342 


39-346 


39-350 


39-354 


39-358 


39.362 


39.366 


1000 


39-370 


39-374 


39-37S 


39.382 


39-386 


39-390 


39-394 


39-398 


39.401 


39.405 



Smithsonian Tables. 



35 



Table 1 1 . 



BAROMETRIC INCHES (MERCURY) INTO MILLIBARS. 

I inch = 33. 86395 mb. 



Inches 


.00 


.01 


.02 


.03 


.04 


1 
.05 


.06 


.07 


.08 


.09 




mb. 


mb. 


mb. 


mb. 


mb. 


nib. 


mb. 


mb. 


mb. 


mb. 


0.0 


0.00 


0.34 


0.68 


1.02 


1.35 


1.69 


2.03 


2.37 


2.71 


3.05 


0.1 


3-39 


3-73 


4.06 


4.40 


4.74 


5.08 


5.43 


5-76 


6.10 


6.43 


0.2 


6.77 


7. II 


7.45 


7.79 


8.13 


8.47 


8.80 


9.14 


9.48 


9.82 


0-3 


10.16 


10.50 


10.84 


II. 18 


II. 51 


11.85 


12.19 


12-53 


12.S7 


13.21 


0.4 


13-55 


13-88 


14.22 


14.56 


14.90 


15.24 


15.58 


15-92 


16.25 


16.59 


0.5 


16.93 


17.27 


17.61 


17.95 


18.29 


18.63 


18.96 


19.30 


19.64 


19.98 


0.6 


20.32 


20.66 


21.00 


21.33 


21.67 


22.01 


22.35 


22.69 


23.03 


23.37 


0.7 


23.70 


24.04 


24.38 


24.72 


25.06 


25.40 


25.74 


26.08 


26.41 


26.75 


0.8 


27-09 


27-43 


27.77 


28.11 


28.45 


28.78 


29.12 


29.46 


29.80 


30.14 


0.9 


30.48 


30.82 


31.15 


31.49 


31.83 


32.17 


32.51 


32.85 


33.19 


33.53 


1.0 


33-86 


34.20 


34.54 


34.88 


35.22 


35-56 


35.90 


36.23 


36.57 


36.91 


I.I 


37-25 


37-59 


37.93 


38.27 


38.60 


38-94 


39.28 


39.62 


39.96 


40.30 


1.2 


40.64 


40.98 


41.31 


41.65 


41.99 


42.33 


42.67 


43.01 


43-35 


43.68 


1-3 


44.02 


44-36 


44.70 


45.04 


45.38 


45.72 


46.05 


46.39 


46.73 


47.07 


1.4 


47.41 


47-75 


48.09 


48.43 


48.76 


49.10 


49.44 


49.78 


50.12 


50.46 


1,5 


50.80 


51-13 


51.47 


51.81 


52.15 


52.49 


52.83 


53.17 


53-51 


53.84 


1.6 


54.18 


54-52 


54.86 


55.20 


55.54 


55.88 


56.21 


56.55 


56.89 


57.23 


1-7 


57-57 


57-91 


58.25 


58.58 


58.92 


59.26 


59.60 


59.94 


60.28 


60.62 


1.8 


60.96 


61.29 


61.63 


61.97 


62.31 


62.65 


62.99 


63.33 


63.66 


64.00 


1.9 


64-34 


64.68 


65.02 


65.36 


65.70 


66.03 


66.37 


66.71 


67.05 


67.39 


2.0 


67-73 


68.07 


68.41 


68.74 


69.08 


69.42 


69.76 


70.10 


70.44 


70.78 


2.1 


71. II 


71-45 


71.79 


72.13 


72.47 


72.81 


73-15 


73.48 


73.82 


74.16 


2.2 


74-50 


74.84 


75.18 


75.52 


75.86 


76.19 


76.53 


76.87 


77.21 


77.55 


2-3 


77.89 


78.23 


78.56 


78.90 


79.24 


79.58 


79.92 


80.26 


80.60 


80.93 


2.4 


81.27 


81.61 


81.95 


82.29 


82.63 


82.97 


83-31 


83.64 


83.98 


84.32 


25.0 


846.6 


846.9 


847-3 


847.6 


848.0 


848.3 


848.6 


849.0 


849.3 


S49.6 


25-1 


850.0 


850.3 


850.7 


851.0 


851.3 


851.7 


852.0 


852.4 


852.7 


853.0 


25.2 


853-4 


853.7 


854.0 


854.4 


854.7 


855.1 


855-4 


855.7 


856.1 


856.4 


25-3 


856.8 


857.1 


857.4 


857.8 


858.1 


858.5 


858.8 


859.1 


859.5 


859-8 


254 


860.1 


860.5 


860.8 


861.2 


861.5 


861.8 


862.2 


862.5 


862.9 


863.2 


25.5 


863.5 


863.9 


864.2 


864.5 


864.9 


865.2 


865.6 


865.9 


866.2 


866.6 


25.6 


866.9 


867.3 


867.6 


867.9 


868.3 


868.6 


868.9 


869.3 


869.6 


870.0 


25-7 


870.3 


870.7 


871.0 


871.3 


871.7 


872.0 


872.3 


872.7 


873.0 


873-4 


25-8 


873-7 


874.0 


874.4 


874.7 


875.0 


875.4 


875.7 


876.1 


876.4 


876.7 


25-9 


877-1 


877.4 


877.8 


878.1 


878.4 


878.8 


879.1 


879.4 


•879.8 


880.1 


26.0 


880.5 


880.8 


881. 1 


881.5 


881.8 


882.2 


882.5 


882.8 


883.2 


88^.5 


26.1 


883.8 


884.2 


884.5 


884.9 


885.2 


885.5 


885.9 


886.2 


886.6 


885.9 


26.2 


887.2 


887.6 


887.9 


888.3 


888.6 


888.9 


889.3 


889.6 


889.9 


890.3 


26.3 


890.6 


891.0 


891.3 


891.6 


892.0 


892.3 


892.7 


893.0 


893.3 


893.7 


26.4 


894.0 


894-3 


894.7 


895.0 


895-4 


895.7 


896.0 


896.4 


896.7 


897.1 


26.5 


897.4 


897-7 


898.1 


898.4 


898.7 


899.1 


899-4 


899.8 


900.1 


900.4 


26.6 


900.8 


901. 1 


901.5 


901.8 


902.1 


902.5 


902.8 


903.2 


903.5 


903.8 


26.7 


904.2 


904.5 


904.8 


905.2 


905.5 


905.9 


906.2 


906.5 


906.9 


907.2 


26.8 


907.6 


907.9 


908.2 


908.6 


908.9 


909.2 


909.6 


909.9 


910.3 


910.6 


26.9 


910.9 


911.3 


9 1 1. 6 


912.0 


912.3 


912.6 


913.0 


913.3 


913.6 


914.0 


27.0 


914-3 


914.7 


915.0 


915.3 


915.7 


916.0 


916.4 


916.7 


917.0 


917.4 


27.1 


917.7 


918.1 


918.4 


918.7 


919. 1 


919.4 


919.7 


920.1 


920.4 


920.8 


27.2 


921. 1 


921.4 


921.8 


922.1 


922.5 


922.8 


923.1 


923.5 


923.8 


924.1 


27-3 


924-5 


924.8 


925.2 


925.5 


925.8 


926.2 


926.5 


926.9 


927.2 


927.5 


27.4 

1 


927.9 


928.2 


928.5 


928.9 


929.2 


929.6 


929.9 


930.2 


930.6 


930.9 



Smithsonian Tables. 



,^6 



Table 11. 



BAROMETRIC INCHES (MERCURY) INTO MILLIBARS. 

I inch = 33-86395 mb. 




SMITHSONIAN TABLES. 



Table 1 2. 

BAROMETRIC MILLIMETERS (MERCURY) INTO MILLIBARS. 

I mm.= 1.33322387 mb. 



Milli- 
meters. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 








1-3 


2.7 


4.0 


5-3 


6.7 


8.0 


9-3 


10.7 


12.0 


10 


13-3 


14.7 


16.0 


17-3 


18.7 


20.0 


21.3 


22.7 


24.0 


25-3 


20 


26.7 


28.0 


29-3 


30-7 


32.0 


33-3 


34-7 


36.0 


37-3 


38-7 


30 


40.0 


41-3 


42.7 


44-0 


45-3 


46.7 


48.0 


49-3 


50.7 


52.0 


40 


53-3 


54-7 


56.0 


57-3 


58.7 


60.0 


61.3 


62.7 


64.0 


65-3 


50 


66.7 


68.0 


69-3 


70.7 


72.0 


73-3 


74-7 


76.0 


77-3 


78.7 


60 


80.0 


81.3 


82.7 


84.0 


85-3 


86.7 


88.0 


89-3 


90-7 


92.0 i 


70 


93-3 


94-7 


96.0 


97-3 


98.7 


lOO.O 


101.3 


102.7 


104.0 


105.3 


1 80 


106.7 


108.0 


109.3 


1 10. 7 


112. 


"3-3 


114.7 


116.0 


"7-3 


118.7 


1 90 


120.0 


121.3 


122.7 


124.0 


125-3 


126.7 


128.0 


129.3 


130.7 


132.0 


100 


^33-3 


134-7 


136.0 


137-3 


138-7 


140.0 


141-3 


142.7 


144.0 


145-3 


no 


146.7 


148.0 


149-3 


150.7 


152.0 


153-3 


154-7 


156.0 


157-3 


158.7 


120 


160.0 


161.3 


162.7 


164.0 


165.3 


166.7 


168.0 


169.3 


170.7 


172.0 


130 


173-3 


174-7 


176.0 


177-3 


178.7 


180.0 


181.3 


182.7 


184.0 


185-3 


■40 


186.7 


188.0 


189.3 


190.7 


192.0 


193-3 


194.7 


196.0 


197-3 


198.7 


' 150 


200.0 


201.3 


202.7 


204.0 


205.3 


206.6 


208.0 


209.3 


210.6 


212.0 


160 


213-3 


214.6 


216.0 


217.3 


218.6 


220.0 


221.3 


222.6 


224.0 


225.3 


170 


226.6 


228.0 


229.3 


230.6 


232.0 


233-3 


234.6 


236.0 


237-3 


238.6 


180 


240.0 


241.3 


242.6 


244.0 


245-3 


246.6 


248.0 


249-3 


250.6 


252.0 


190 


253-3 


254.6 


256.0 


257-3 


258.6 


260.0 


261.3 


262.6 


264.0 


265.3 


200 


266.6 


268.0 


269.3 


270.6 


272.0 


273-3 


274.6 


276.0 


277-3 


278.6 


210 


280.0 


281.3 


282.6 


284.0 


285.3 


286.6 


28S.0 


289.3 


290.6 


292.0 


220 


293-3 


294.6 


296.0 


297-3 


298.6 


300.0 


301.3 


302.6 


304-0 


305-3 


230 


306.6 


308.0 


309-3 


310.6 


312.0 


313-3 


314.6 


316.0 


317-3 


318.6 


240 


320.0 


321.3 


322.6 


324.0 


325-3 


326.6 


32S.0 


329-3 


330.6 


332-0 


250 


333-3 


334-6 


336.0 


337-3 


338.6 


340.0 


341-3 


342.6 


344-0 


345-3 


260 


346.6 


348.0 


349-3 


350.6 


352.0 


353-3 


354-6 


356.0 


357-3 


358.6 


270 


360.0 


361.3 


362.6 


364.0 


365-3 


366.6 


368.0 


369-3 


370.6 


372.0 


, 280 


373-3 


374-6 


376.0 


377-3 


378.6 


380.0 


381.3 


382.6 


384.0 


385-3 


290 


386.6 


388.0 


389-3 


390.6 


392.0 


393-3 


394-6 


396-0 


397-3 


398-6 


300 


400.0 


401.3 


402.6 


404.0 


405-3 


406.6 


408.0 


409-3 


410.6 


412.0 


310 


413-3 


414.6 


416.0 


417-3 


418.6 


420.0 


421.3 


422.6 


424.0 


425-3 


320 


426.6 


428.0 


429-3 


430.6 


432.0 


433-3 


434-6 


436.0 


■ 437-3 


438.6 


' 330 


440.0 


441-3 


442.6 


444-0 


445-3 


446.6 


44S.0 


449-3 


450.6 


452.0 


340 


453-3 


454-6 


456.0 


457-3 


458-6 


460.0 


461.3 


462.6 


464.0 


465-3 


350 


466.6 


468.0 


469-3 


470.6 


472.0 


473-3 


474-6 


476.0 


477-3 


478.6 


360 


480.0 


481.3 


482.6 


484.0 


485-3 


486.6 


488.0 


489-3 


490.6 


492.0 


370 


493-3 


494.6 


496.0 


497-3 


498.6 


500.0 


501.3 


502.6 


504-0 


505-3 


3S0 


506.6 


508.0 


509-3 


510.6 


512.0 


513-3 


514.6 


516.0 


517-3 


518.6 


390 


520.0 


521.3 


522.6 


524.0 


525-3 


526.6 


528.0 


529-3 


530.6 


532.0 


400 


533-3 


534-6 


536.0 


537-3 


538.6 


540.0 


541-3 


542.6 


544-0 


545-3 


410 


546.6 


548.0 


549-3 


550.6 


552.0 


553-3 


554-6 


556-0 


557-3 


558.6 


420 


560.0 


561.3 


562.6 


564-0 


565-3 


566.6 


568.0 


569-3 


570.6 


572.0 


430 


573-3 


574-6 


576.0 


577-3 


578.6 


580.0 


S81-3 


582.6 


584-0 


585-3 


440 


586.6 


588.0 


589-3 


590-6 


592.0 


593-3 


594-6 


596.0 


597-3 


598-6 



Smithsonian Tables. 



38 



Table 12. 
BAROMETRIC MILLIMETERS (MERCURY) INTO MILLIBARS. 

I mm. = 1.33322387 mb. 





Milli- 
meters. 





1 


2 


3 


4 


5 


6 


7 


8 


9 






mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 1 




450 


600.0 


601.3 


602.6 


604.0 


605.3 


606.6 


60S.0 


609.3 


610.6 


611.9 




460 


613.3 


614.6 


615.9 


617.3 


618.6 


619.9 


621.3 


622.6 


623.9 


625.3 




470 


626.6 


627.9 


629.3 


630.6 


631.9 


633-3 


634.6 


635.9 


637.3 


638.6 




480 


639.9 


641.3 


642.6 


643.9 


645.3 


646.6 


647-9 


649-3 


650.6 


651.9 




490 


653.3 


654.6 


655-9 


657-3 


658.6 


659-9 


661.3 


662.6 


663.9 


665.3 i 




500 


666.6 


667.9 


669.3 


670.6 


671.9 


673-3 


674.6 


675.9 


677-3 


678.6 




510 


679.9 


681.3 


682.6 


683.9 


685.3 


686.6 


687.9 


689.3 


690.6 


691.9 ; 




520 


693.3 


694.6 


695-9 


697-3 


698.6 


699-9 


701.3 


702.6 


703-9 


705.3 




530 


706.6 


707.9 


709-3 


710.6 


711.9 


713-3 


714.6 


715-9 


717-3 


718.6 




540 


719.9 


721.3 


722.6 


723-9 


725-3 


726.6 


727.9 


729-3 


730.6 


731.9 




550 


733-3 


734.6 


735-9 


737-3 


738.6 


739-9 


741-3 


742.6 


743-9 


745-3 ' 




560 


746.6 


747-9 


749-3 


750.6 


751.9 


753-3 


754-6 


755-9 


757-3 


758.6 




570 


759-9 


761.3 


762.6 


763.9 


765.3 


766.6 


767.9 


769.3 


770.6 


771.9 




580 


773-3 


774.6 


775-9 


777-3 


778.6 


779-9 


781.3 


782.6 


783-9 


785.3 ' 




590 


786.6 


787.9 


789-3 


790.6 


791.9 


793-3 


794.6 


795-9 


797-3 


798.6 : 




600 


799-9 


801.3 


802.6 


803.9 


805.3 


806.6 


807.9 


809.3 


810.6 


811.9 




610 


813-3 


814.6 


815.9 


817.3 


818.6 


819.9 


821. s 


822.6 


823.9 


825.3 




620 


826.6 


827.9 


829.3 


830.6 


831.9 


833-3 


834.6 


835-9 


837-3 


838.6 1 




630 


839-9 


841.3 


842.6 


843-9 


845-3 


846.6 


847.9 


849-3 


850.6 


851.91 




640 


853-3 


854.6 


855-9 


857-3 


858.6 


859-9 


861.3 


862.6 


863.9 


865.3 




650 


866.6 


867.9 


869.3 


870.6 


871.9 


873-3 


874-6 


875-9 


877.3 


878.6 i 




660 


879.9 


881.3 


882.6 


883.9 


885.3 


886.6 


887.9 


889.3 


890.6 


891.9 




670 


893-3 


894.6 


895.9 


897.3 


898.6 


899.9 


901.3 


902.6 


903-9 


905.3 1 




680 


906.6 


907.9 


909-3 


910.6 


911.9 


913-3 


914.6 


915-9 


917-3 


918.6 ; 




690 


919.9 


921.3 


922.6 


923-9 


925-3 


926.6 


927.9 


929-3 


930.6 


931-9 




700 


933-3 


934-6 


935-9 


937-3 


938.6 


939.9 


041-3 


942.6 


943-9 


945.3 




710 


946.6 


947-9 


949-3 


950.6 


951-9 


953-3 


954-6 


955-9 


957-3 


958.6 




720 


959-9 


961.3 


962.6 


963.9 


965-3 


966.6 


967.9 


969-3 


970.6 


971.91 




730 


973-3 


974.6 


975-9 


977-3 


978.6 


979-9 


981.3 


982.6 


983-9 


985.3 




740 


986.6 


987.9 


989-3 


990.6 


991.9 


993-3 


994.6 


995-9 


997-3 


998.6 ; 




750 


999-9 


1001.3 


1002.6 


1003.9 


1005.3 


1006.6 


1007.9 


1009.3 


1010.6 


1011.9 




760 


1013-3 


1014.6 


1015.9 


1017.2 


1018.6 


1019.9 


1021.2 


1022.6 


1023.9 


1025.2 




770 


1026.6 


1027.9 


1029.2 


1030.6 


1031.9 


1033-2 


1034.6 


1035.9 


1037.2 


1038.6 




780 


1039.9 


1041.2 


1042.6 


1043.9 


1045.2 


1046.6 


1047.9 


1049.2 


1050.6 


1051.9 




790 


TOS3-2 


1054.6 


1055-9 


1057.2 


1058.6 


1059-9 


1061.2 


1062.6 


1063.9 


1065.2 



Smithsonian Tables. 



39 



Table 1 3. 



FEET INTO METERS. 

I foot =03048006 meter. 



Feet. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




m. 


m. 


in. 


m. 


m. 


m. 


m. m. 


m. 


m. 





0.000 


0-305 


0.610 


0.914 


1. 219 


i-524 


1.829 


2.134 


2.438 


2-743 


10 


3.048 


3-353 


3-658 


3.962 


4-267 


4-572 


4.877 


5.182 


5-486 


5-791 


20 


6.096 


6.401 


6.706 


7.010 


7-315 


7.620 


7-925 


8.230 


8-534 


8.839 


30 


9.144 


9-449 


9-754 


10.058 


10.363 


10.668 


10.973 


11.278 


11.582 


11.887 


40 


12.192 


12.497 


12.802 


13.106 


13-411 


13.716 


14.021 


14.326 


14.630 


14-935 


50 


15.240 


15-545 


15-850 


16.154 


16.459 


16.764 


17.069 


17-374 


17.678 


17-983 


60 


18.288 


18.593 


18.89S 


19.202 


19-507 


19.812 


20. 1 1 7 


20.422 


20.726 


21.031 


70 


21.336 


21.641 


21.946 


22.250 


22.555 


22.860 


23-165 


23.470 


23-774 


24.079 


80 


24.384 


24.689 


24.994 


25.298 


25-603 


25.908 


26.213 


26.518 


26.822 


27.127 


90 
100 


27.432 


27.737 


28. 042 


28.346 


28.651 


28.956 


29.261 


29.566 


29.870 


30-175 





10 


20 


30 


40 


50 


60 


70 


80 


90 


30.48 


33-53 


36.58 


39.62 


42.67 


45-72 


4S.77 


51-82 


54-86 


57-91 


200 


60.96 


64.01 


67.06 


70.10 


73-15 


76.20 


79-25 


82.30 


85 -34 


88.39 


300 


91.44 


94-49 


97-54 


100.58 


103.63 


106.68 


109.73 


112.78 


115.82 


11S.87 


400 


121.92 


124.97 


128.02 


131.06 


134. 1 1 


137.16 


140.21 


143.26 


146.30 


149-35 


500 


152.40 


155-45 


158.50 


161.54 


164.59 


167.64 


170.69 


173-74 


176.78 


179-83 


600 


182.88 


185-93 


188.98 


192.02 


195-07 


19S.12 


201.17 


204.22 


207.26 


210.31 


700 


213.36 


216.41 


219.46 


222.50 


225-55 


22S.60 


231-65 


234.70 


237-74 


240.79 


800 


243.84 


246.89 


249.94 


252.98 


256.03 


259.08 


262.13 


265.18 


268.22 


271.27 


900 


274.32 


277-37 


280.42 


283.46 


286.51 


289.56 


292.61 


295-66 


29S.70 


301.75 


1000 


304.80 


307-85 


310.90 


313-94 


316.99 


320.04 


323.09 


326.14 


329.18 


332.23 


IIOO 


335-28 


338.33 


34 1 -38 


344.42 


347-47 


350.52 


353-57 


356.62 


359-67 


362.71 


1200 


365-76 


368.81 


371.86 


374-90 


377-95 


381.00 


384-05 


387.10 


390.14 


393-19 


1300 


396.24 


399.29 


402.34 


405-38 


408.43 


411.48 


414-53 


417-58 


420.62 


423-67 


1400 


426.72 


429.77 


432.82 


435-86 


438.91 


441.96 


445.01 


448.06 


451.10 


454-15 


1500 


457-20 


460.25 


463-30 


466.34 


469-39 


472.44 


475-49 


478-54 


481.58 


484.63 


1600 


487.68 


490.73 


493-78 


496.82 


499- 87 


502.92 


505-97 


509-02 


512.07 


515-11 


1700 


518.16 


521.21 


524.26 


527-31 


530.35 


533-40 


536.45 


539-50 


542-55 


545-59 


1800 


548.64 


551-69 


554-74 


557-79 


560.83 


563.88 


566.93 


569.98 


573-03 


576.07 


1900 


579-12 


582.17 


585-22 


588.27 


591-31 


594-36 


597-41 


600.46 


603.51 


606.55 


2000 


609. 60 


612.65 


615-70 


618.75 


621.79 


624.84 


627.89 


630.94 


633-99 


637-03 


2100 


640.08 


643-13 


646.18 


649.23 


652.27 


655-32 


658.37 


661.42 


664.47 


667.51 


2200 


670.56 


673.61 


676.66 


679.71 


682.75 


685.80 


688. 85 


691.90 


694-95 


697.99 


2300 


701.04 


704.09 


707.14 


710.19 


713-23 


716.28 


719-33 


722.38 


725-43 


728.47 


2400 


731-52 


734-57 


737.62 


740.67 


743- 7 i 


746.76 


749.81 


752.86 


755-91 


758.95 


2500 


762.00 


765.05 


768.10 


771-15 


774-19 


777-24 


780.29 


783.34 


786.39 


7S9.43 


2600 


792.48 


795-53 


798.58 


801.63 


804.67 


807.72 


810.77 


813.82 


816.87 


819.91 


2700 


822.96 


826.01 


829.06 


832.11 


835-15 


8^,8. 20 


841.25 


844-30 


847-35 


850.39 


2800 


853-44 


856.49 


859-54 


862.59 


865.63 


868.68 


871-73 


874-78 


877-83 


880.87 


2900 


883.92 


886.97 


890.02 


893.07 


896.11 


899.16 


902.21 


905.26 


908.31 


911-35 1 


3000 


914.40 


917-45 


920.50 


923-55 


926.59 


929.64 


932.69 


935-74 


938.79 


941.83 1 


3100 


944.88 


947-93 


950.98 


954-03 


957-07 


960.12 


963-17 


966.22 


969-27 


972-31 ! 


3200 


975-36 


978.41 


981.46 


984.51 


987-55 


990. 60 


.993-65 


996.70 


999-75 


1002.79 


3300 


1005.84 


1008.89 


1011.94 


1014.99 


1018.03 


1021.08 


1024.13 


1027.18 


1030.23 


1033.27 


3400 


1036.32 


1039-37 


1042.42 


1045.47 


104S.51 


1051.56 


1054.61 


1057.66 


1060.71 


1063.75 


3500 


1066.80 


1069.85 


1072.90 


1075.95 1078.99 


1082.04 


1085.09 


1088.14 


1091.19 


1094.23 


3600 


1097.28 


1100.33 


1 103.38 


1106.43 1109.47 


1112.52 


1115-57 


1 1 18.62 


1121.67 


1124.71 


3700 


r 127.76 


1130.S1 


1133.86 


1 136.91 


"39-95 


1143.00 


1146.05 


1149.10 


1 152-15 


1155-19 


3800 


1158.24 


1161.29 


1164.34 


1167.39 


1170.43 


1173.48 


1176.53 


1179.58 


1182.63 


1185.67 


3900 


1188.72 


1191.77 


1194.82 


1197.87 


1200.91 


1203.96 


1207.01 


1210.06 


1213.11 


1216.15 


j 4000 


1219.20 


1222.25 


1225.30 


1228.35 


1231.39 


1234.44 


1237.49 


1240.54 


1243-59 


1246.63 



Smithsonian T/bles, 



40 



Table 1 3. 



FEET INTO METERS. 

I £001=0.3048006 meter. 



Feet. 





10 


20 30 


40 


50 


60 


70 


80 


90 




1 


m. 


m. 


tn. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 




4000 


1219.2 


1222.3 


1225.3 


1228.3 


1231.4 


1234.4 


1237.5 


1240.5 


1243.6 


1246.6 




4100 


1249.7 


1252.7 


1255.8 


1258.8 


1261.9 


1264.9 


126S.O 


1271.O 


1274.1 


1277. 1 




4200 


1280.2 


1283.2 


1286.3 


1289.3 


1292.4 


1295.4 


1298.5 


1301.5 


1304.5 


1307.6 




4300 


1310.6 


1313.7 


1316.7 


1319.8 


1322.8 


1325.9 


1328.9 


1332.0 


1335.0 


1338.1 




4400 


1341.I 


1344.2 


1347.2 


1350.3 


1353-3 


1356.4 


1359.4 


1362.5 


1365.5 


1368.6 




4500 


1371.6 


1374.7 


1377.7 


1380.7 


1383-8 


1386.8 


1389.9 


I392-Q 


1396.0 


1399.0 




4600 


1402. 1 


1405. I 


1408.2 


1411.2 


1414-3 


1417.3 


1420.4 


1423.4 


1426.5 


1429.5 




4700 


1432.6 


1435.6 


1438.7 


1441.7 


1444.8 


1447.8 


1450.9 


1453-9 


1456.9 


1460.0 




4S00 


1463.0 


1466. I 


1469. 1 


1472.2 


1475-2 


1478.3 


1481.3 


1484.4 


1487.4 


1490.5 




4900 


1493-5 


1496.6 


1499.6 


1502.7 


1505.7 


1508.8 


1511.8 


1514.9 


1517.9 


1521.0 




5000 


1524.0 


1527.I 


1530. I 


1533.1 


1536.2 


1539.2 


1542.3 


1545.3 


1548.4 


1551.4 




5100 


1554-5 


1557.5 


1560.6 


1563.6 


1566.7 


1569.7 


1572.8 


1575.8 


1578.9 


1581.9 




5200 


15S5-0 


1588.0 


1591.1 


1594.1 


1597-2 


1600.2 


1603.3 


1606.3 


1609.3 


1612.4 




5300 


1615.4 


1618.5 


1621.5. 


1624.6 


1627.6 


1630.7 


1633.7 


1636.8 


1639-8 


1642.9 




5400 


1645-9 


1649.0 


1652.0 


1655. I 


1658. 1 


1661.2 


1664.2 


1667.3 


1670.3 


1673.4 




' 5500 


1676.4 


1679.5 


1682.5 


1685.5 


1688.6 


169I.6 


1694.7 


1697.7 


1700.8 


1703.8 




5600 


1706.9 


1709.9 


1713.0 


1716.0 


1719.1 


1722. I 


1725.2 


1728.2 


1731-3 


1734.3 




5700 


1737-4 


1740.4 


1743-5 


1746.5 


1749-6 


1752.6 


1755.7 


1758.7 


1761.7 


1764.8 




5S00 


1767.8 


1770.9 


1773-9 


1777.0 


1780.0 


1783.1 


1786. 1 


1789.2 


1792.2 


1795.3 




5900 


179S-3 


1S01.4 


1804.4 


1807.5 


1810.5 


1813.6 


1816.6 


1819.7 


1822.7 


1825.8 




6000 


1828.8 


1831.9 


1834-9 


1837.9 


1841.0 


1844.0 


1847. 1 


1850. 1 


1853-2 


1856.2 




6100 


1859-3 


1862.3 


1865.4 


1868.4 


1871.5 


1874.5 


1877.6 


1880.6 


1883.7 


1886.7 




6200 


1889.8 


1892.8 


1895-9 


1898.9 


1902.0 


1905.0 


1908. 1 


1911.1 


1914.I 


1917.2 




6300 


1920.2 


1923.3 


1926.3 


1929.4 


1932.4 


1935-5 


1938.5 


1941.6 


1944-6 


1947.7 




6400 


1950.7 


1953.8 


1956.8 


1959.9 


1962.9 


1966.0 


1969.0 


1972. I 


1975-1 


1978.2 




6500 


1981.2 


1984.3 


1987-3 


1990.3 


1993.4 


1996.4 


1999.5 


2002.5 


2005.6 


2008.6 




6600 


2oir.7 


2014.7 


2017.8 


2020.8 


2023.9 


2026.9 


2030.0 


2033.0 


2036. 1 


2039. 1 




6700 


2042.2 


2045.2 


2048.3 


2051.3 


2054.4 


2057-4 


2060.5 


2063.5 


2066.5 


2069.6 




6800 


2072.6 


2075.7 


2078.7 


2081.8 


2084.8 


20S7.9 


2090.9 


2094.0 


2097.0 


2100. 1 




6900 


2103. 1 


2106.2 


2109.2 


2112.3 


2115.3 


2118.4 


2121.4 


2124.5 


2127.5 


2130.6 




7000 


2133-6 


2136.7 


2139.7 


2142.7 


2145.8 


2 148. 8 


2151.9 


2154.9 


2158.0 


2161.O 




7100 


2164. 1 


2167. 1 


2170.2 


2173.2 


2176.3 


2179-3 


2182.4 


2185.4 


2188.5 


2191.5 




7200 


2194.6 


2197.6 


2200.7 


2203.7 


2206.8 


2209.8 


2212.9 


2215.9 


2218.9 


2222.0 




7300 


2225.0 


2228.1 


2231. I 


2234.2 


2237.2 


2240.3 


2243.3 


2246.4 


2249.4 


2252.5 




7400 


2255-5 


2258.6 


2261.6 


2264.7 


2267.7 


2270.S 


2273.8 


2276.9 


2279.9 


2283.0 




7500 


2286.0 


2289. 1 


2292.1 


2295.1 


2298.2 


2301.2 


2304.3 


2307.3 


2310.4 


2313.4 




7600 


2316.5 


2319.5 


2322.6 


2325-6 


2328.7 


2331-7 


2334.8 


2337.8 


2340.9 


2343.9 




7700 


2347.0 


2350.0 


2353-1 


2356.1 


2359-2 


2362.2 


2365.3 


2368.3 


2371.3 


2374.4 




78CK) 


2377-4 


2380.5 


23S3-5 


2386.6 


2389-6 


2392-7 


2395.7 


2398.8 


2401.8 


2404.9 




7900 


2407.9 


241I.O 


2414.0 


2417-1 


2420. 1 


2423.2 


2426.2 


2429.3 


2432.3 


2435-4 




8000 


2438.4 


2441.5 


2444-5 


2447-5 


2450.6 


2453-6 


2456.7 


2459.7 


2462.8 


2465-8 




8100 


2468.9 


2471.9 


2475-0 


2478.0 


2481. 1 


2484. I 


2487.2 


2490.2 


2493.3 


2496-3 




8200 


2499.4 


2502.4 


2505-5 


2508.5 


2511.6 


2514-6 


2517-7 


2520.7 


2523-7 


2526.8 




8300 


2529.8 


2532.9 


2535-9 


2539-0 


2542.0 


2545-1 


2548.1 


2551.2 


2554.2 


2557-3 




8400 


2560.3 


2563.4 


2566.4 


2569-5 


2572.5 


2575-6 


2578.6 


2581.7 


2584.7 


2587.8 




8500 


2590.8 


2593-9 


2596.9 


2599-9 


2603.0 


2606.0 


2609. 1 


2612. I 


2615.2 


2618.2 




8600 


2621.3 


2624.3 


2627.4 


2630.4 


2633.5 


2636.5 


2639.6 


2642.6 


2645.7 


2648.7 




8700 


2651.8 


2654.8 


2657.9 


2660.9 


2664.0 


2667.0 


2670. 1 


2673.1 


2676.1 


2679.2 




8800 


2682.2 


2685.3 


2688.3 


2691.4 


2694.4 


2697.5 


2700.5 


2703.6 


2706.6 


2709.7 




8900 


2712.7 


2715.8 


2718.8 


2721.9 


2724.9 


2728.0 


2731.0 


2734.1 


2737-1 


2740.2 




9000 


2743.2 


2746.3 


2749.3 


2752.3 


2755.4 


2758.4 


2761.5 


2764.5 


2767.6 


2770.6 





Smithsonian Tables. 



41 



Table 14. 
























METERS 


INTO FEET. 




I meter =39.3700 


inches =3.280833 feet. 


Meters. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. Feet. 


Feet. 


Feet. 





0.00 


3.28 


6.56 


9-84 


13.12 


16.40 


19.68 


22.97 


26.25 


29-53 


lO 


32.81 


36.09 


39-37 


42.65 


45-93 


49.21 


52.49 


55-77 


59-05 


62.34 


20 


65.62 


68.90 


72.18 


75-46 


78-74 


82.02 


85-30 


88.58 


91.86 


95.14 


30 


98.42 


IOI.71 


104.99 


108.27 


111-55 


114-83 


118. II 


121.39 


124.67 


127.95 


40 


131-23 


134-51 


137-79 


14X.08 


144.36 


147-64 


150.92 


154-20 


157-48 


160.76 


50 


164.04 


167.32 


170.60 


173-88 


177.16 


180.45 


183.73 


187.01 


190.29 


193-57 


60 


196.S5 


200.13 


203.41 


206.69 


209.97 


213-25 


216.53 


219.82 


223.10 


226.38 


70 


229.66 


232.94 


236.22 


239-50 


242. 78 


246.06 


249-34 


252.62 


255-90 


259-19 


80 


262.47 


265.75 


269.03 


272.31 


275-59 


278.87 


282.15 


2S5.43 


28S.71 


291.99 


90 


295.27 


298.56 


301.84 


305-12 


308.40 


311.68 


314.96 


318.24 


321.52 


324.80 


100 


328.08 


331-36 


334-64 


337-93 


341.21 


344-49 


347-77 


351-05 


354-33 


357-61 


no 


360.89 


364-17 


367-45 


370.73 


374-OI 


377-30 


380.58 


383.86 


387-14 


390.42 


120 


39370 


396.98 


400.26 


403-54 


406.82 


410.10 


413-38 


416.67 


419-95 


423-23 


130 


426.51 


429.79 


433-07 


436.35 


439-63 


442.91 


446.19 


449-47 


452.75 


456.04 


140 


459-32 


462.60 


465.SS 


469.16 


472.44 


475-72 


479.00 


4S2.28 


485-56 


488.84 


150 


492.12 


495-41 


498.69 


501.97 


505-25 


508.53 


511.81 


515-09 


518.37 


521.65 


160 


524-93 


528.21 


531-49 


534-78 


538.06 


541-34 


544.62 


547-90 


55T-1S 


554-46 


170 


557-74 


561.02 


564-30 


567-58 


570.86 


574-15 


577-43 


580.71 


583-99 


587-27 


180 


590-55 


593-83 


597-11 


600.39 


603.67 


606.95 


610.23 


613.52 


616.80 


620.08 


190 


623.36 


626.64 


629.92 


633.20 


636.48 


639-76 


643.04 


646.32 


649.60 


652.89 


200 


656.17 


659-45 


662.73 


666.01 


669.29 


672.57 


675-85 


679-13 


682.41 


685.69 


210 


688.97 


692.26 


695-54 


698.82 


702.10 


705-38 


708.66 


711-94 


715.22 


718.50 


220 


721.78 


725.06 


728.34 


731-63 


734-91 


738. [9 


741-47 


744-75 


748.03 


751-3^ 


230 


754-59 


757-87 


761.15 


764-43 


767.71 


771.00 


774.28 


777-56 


780.84 


784.12 


240 


787-40 


790.68 


793.96 


797.24 


800.52 


803.80 


807.0S 


810.37 


813-65 


816.93 


250 


820.21 


823.49 


826.77 


830.05 


833-33 


836.61 


839.89 


843-17 


846.45 


849.74 


260 


853-02 


856.30 


859-58 


862.86 


866.14 


869.42 


872.70 


875-98 


879.26 


882.54 


270 


8S5.82 


889.11 


892.39 


895.67 


898.95 


902.23 


905-51 


908.79 


912.07 


915-35 


280 


918.63 


921.91 


925.19 


928.48 


931-76 


935-04 


938-32 


941.60 


944.88 


948.16 


290 


951-44 


954-72 


958.00 


961.28 


964-56 


967.85 


971-13 


974-41 


977.69 


980.97 


300 


984.25 


987-53 


990.81 


994.09 


997-37 


1000.65 


1003.93 


1007.22 


1010.50 


1013.78 


310 


[017.06 


1020.34 


1023.62 


1026.90 


[030.18 


1033.46 


1036.74 


1040.02 


1043.30 


1046.59 


320 


1049.87 


1053-15 


[ 056.43 


1059.71 


[062.99 


1066.27 


1069.55 


1072.83 


1076.11 


1079-39 


330 


1082.67 


10S5.96 


[089.24 


1092.52 


[095.80 


1099.0S 


1102.36 


1105.64 


1109.92 


1112.20 


340 


[1 15.48 


IIIS.76 


1122.04 


1125-33 


112S.61 


1131.89 


1135.17 


1138-45 


1141.73 


1145.01 


350 


[ 148.29 


[I5I-57 


1154-85 


1158.13 


1161.41 


[ 164.70 


1167.98 


1171.26 


1174.54 


1177.82 


360 


[181.10 


[ 184.38 


1187.66 


1 190.94 


1194.22 


[ 197.50 


1200.78 


1204.07 


1207.35 


1210.63 


370 


1 2 13.91 


I2[7.i9 


1220.47 


1223.75 


1227.03 


1230.31 


1233-59 


12^,6.87 


1 240. 1 5 


[ 243-44 


380 


[246.72 


[ 250.00 


1253.28 


1256.56 


1259-84 


1263.12 


1266.40 


1269.68 


1272.96 


1276.24 


390 


1279-52 


1282.81 


1286.09 


1289.37 


1292.65 


1295.93 


1299.21 


1302.49 


1305.77 


[309.05 


400 


1312.33 


1315.61 


1318.89 


1322.18 


1325.46 


1328.74 


1332.02 


1335-30 


1338.58 


1341.86 


410 


[345-14 


1348.42 


1351-70 


1354-98 


1358.26 


1361.55 


1364.83 


1368.11 


[371-39 


[374-67 


420 


[377-95 


1381.23 


13S4-51 


1387.79 


[391.07 


1394-35 


1397-63 


1400.92 


1404.20 


[407.48 


430 


1410.76 


1414.04 


1417.32 


1420.60 


1423.88 


[427.16 


1430.44 


1433-72 


1437-00 


[440.29 


440 


'443-57 


1446.85 


1450.13 


1453-41 


1456.69 


1459-97 


[463.25 


1466.53 


1469.81 


[473.09 


450 


1476.37 


1479.66 


1482.94 


1486.22 


1489.50 


1492.78 


1496.06 


1499-34 


1502.62 


1505.90 


460 


1509.18 


1512.46 


1515-74 


1519-03 


1522.31 


[525-59 


1528.87 


1532.15 


1535-43 


1538.71 


470 


[541-99 


1545-27 


1548.55 


1551-83 


1 555- [I 


1558.40 


[561.68 


1564.96 


1568.24 


[571.52 


480 


[574-80 


1578.08 


1581.36 


1584.64 


1587.92 


1591.20 


[594.48 


1597-77 


1601.05 


1604.33 


490 


1607.61 


1610.89 


1614.17 


1617.45 


1620.73 


1624.01 


1627.29 


1630.57 


1633-85 


1637.14 


500 


[640.42 


1643.70 


1646.98 


1650.26 


1653-54 


1656.82 


[660.10 


1663.38 


1660.66 


1669.94 


IVIITHSCNIAP 


Fables 





















42 



Table 14. 



METERS INTO FEET. 

I meter = 39.3700 inches^ 3 280833 feet. 



Meters. 





10 


20 


30 


40 


50 


60 


70 


80 


90 






Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 




500 


1640.4 


1673.2 


1706.0 


1738.8 


1771.6 


1804.5 


1837-3 


1870.I 


1902.9 


1935-7 




600 


1968.5 


2001.3 


2034.1 


2066.9 


2099.7 


2132-5 


2165.3 


2198.2 


2231.0 


2263.8 




700 


2296.6 


2329.4 


2362.2 


2395-0 


2427.8 


2460.6 


2493-4 


2526.2 


2559.0 


2591-9 




Soo 


2624.7 


2657-5 


2690.3 


2723.1 


2755-9 


2788.7 


2821.5 


2854-3 


2887.1 


2919.9 




900 


2952.7 


2985.6 


3018.4 


3051-2 


3084.0 


3I16.8 


3149-6 


3182.4 


3215.2 


3248.0 




1000 


3280.8 


3313-6 


3346-4 


3379-3 


3412.1 


3444-9 


3477.7 


3510.5 


3543.3 


3576.1 




1 100 


3608.9 


3641-7 


3674-5 


3707-3 


3740.1 


3773-0 


3805.S 


3838.6 


3871.4 


3904.2 




1200 


3937-0 


3969-8 


4002.6 


4035-4 


4068.2 


4101.0 


4133-8 


4166.7 


4199.5 


4232.3 




1300 


4265.1 


4297.9 


4330-7 


4363-5 


4396-3 


4429-1 


4461.9 


4494-7 


4527.5 


4560.4 




1400 


4593-2 


4626.0 


4658.8 


4691.6 


4724.4 


4757-2 


4790-0 


4822.8 


4855-6 


48S8.4 




1500 


4921.2 


4954-1 


4986.9 


5019-7 


5052.5 


5085-3 


5118.I 


5150.9 


5183-7 


5216.5 




1600 


5249-3 


5282.1 


5314-9 


5347-8 


5380.6 


5413-4 


5446.2 


5479-0 


551I-8 


5544-6 




1700 


5577-4 


5610.2 


5643-0 


5675-8 


570S.6 


5741-5 


5774-3 


5807.1 


5839-9 


5872.7 




iSgo 


5905-5 


5938-3 


597I-I 


6003.9 


6036.7 


6069.5 


6102.3 


6135-2 


6168.0 


6200.8 




1900 


6233.6 


6266.4 


6299.2 


6332-0 


6364.8 


6397.6 


6430.4 


6463.2 


6496.0 


6528.9 




2000 


6561.7 


6594-5 


6627.3 


6660.1 


6692.9 


6725-7 


6758-5 


6791-3 


6824.1 


6856.9 




2100 


6889.7 


6922.6 


6955-4 


6988.2 


7021.0 


7053-8 


7086.6 


71 19.4 


7152.2 


7185.0 




2200 


7217-8 


7250.6 


7283-4 


7316.3 


7349-1 


7381-9 


7414-7 


7447-5 


7480.3 


7513-1 




2300 


7545-9 


7578.7 


7611.5 


7644-3 


7677.1 


7710.0 


7742.8 


7775-6 


7S08.4 


7841.2 




2400 


7874-0 


7906.8 


7939-6 


7972.4 


8005.2 


8038.0 


8070.8 


8103.7 


8136.5 


8169.3 




2500 


8202.1 


8234.9 


8267.7 


8300.5 


8333-3 


8366.1 


8398.9 


8431-7 


8464.5 


8497-4 




2600 


8530-2 


8563-0 


8595-8 


8628.6 


8661.4 


8694.2 


8727.0 


8759-8 


8792.6 


8825.4 




2700 


S858.2 


8891. 1 


8923.9 


8956-7 


8989-5 


9022.3 


9055-1 


9087.9 


9120.7 


9153-5 




2800 


9186.3 


9219.1 


9251-9 


9284.8 


9317-6 


9350.4 


9383-2 


9416.0 


9448.8 


9481.6 




2900 


9514-4 


9547-2 


9580.0 


9612.8 


9645-6 


9678-5 


9711.3 


9744-1 


9776.9 


9809.7 




3000 


9842.5 


9875-3 


990S.1 


9940.9 


9973-7 


10006.5 


10039.3 


10072.2 


IOIO5.O 


10137.8 




3100 


10170.6 


10203.4 


10236.2 


10269.0 


10301.8 


10334.6 


10367.4 


10400.2 


10433.0 


10465.9 




3200 


10498.7 


10531-5 


10564.3 


10597.1 


10629.9 


10662.7 


10695.5 


10728.3 


I0761.I 


10793.9 




3300 


10826.7 


10859.6 


10892.4 


10925.2 


10958.0 


10990.8 


1 1023.6 


1 1056.4 


1 1089.2 


11 122.0 




3400 


1 1 154.8 


1 1 187.6 


1 1220.4 


11253.3 


11286.1 


11318.9 


11351-7 


1 1384-5 


II417-3 


1 1450.1 




3500 


11482.9 


11515-7 


1 1548-5 


11581.3 


11614.1 


1 1647.0 


1 1679.8 


11712.6 


1 1745-4 


1 1778.2 




3600 


riSii.o 


1 1843-8 


1 1876.6 


1 1909.4 


1 1942.2 


1 1975.0 


12007.8 


12040.7 


12073.5 


1 2 106.3 




3700 


12139.1 


12 1 7 1.9 


12204.7 


12237.5 


12270.3 


1 2303. 1 


12335-9 


12368.7 


1 240 1. 5 


12434.4 




3800 


12467.2 


12500.0 


12532.8 


12565.6 


12598.4 


1 263 1. 2 


12664.0 


12696.8 


12729.6 


12762.4 




3900 


12795.2 


1282S.1 


12860.9 


12893.7 


12926.5 


12959-3 


12992. 1 


13024.9 


13057-7 


13090-5 




4000 


13123-3 


13156.1 


13 1 88.9 


13221.8 


13254-6 


13287.4 


13320.2 


13353-0 


13385-8 


13418.6 




4100 


13451-4 


13484.2 


13517-0 


13549-8 


13582.6 


13615-5 


13648.3 


13681.1 


I3713-9 


13746.7 




4200 


13779-5 


13S12.3 


13845-1 


13877.9 


13910.7 


13943-5 


13976.3 


14009.2 


14042.0 


14074.8 




4300 


14107.6 


14140.4 


14173-2 


14206.0 


14238.8 


14271.6 


14304-4 


14337-2 


14370.0 


14402.9 




4400 


14435-7 


14468.5 


14501.3 


14534-I 


14566.9 


14599-7 


14632-5 


14665.3 


14698. 1 


14730.9 




4500 


14763-7 


14796.6 


14829.4 


14862.2 


14895.0 


14927.8 


14960.6 


14993-4 


15026.2 


15059-0 




4600 


15091.8 


15 124.6 


15157-4 


15 1 90-3 


15223.1 


15255-9 


15288.7 


15321.5 


15354-3 


15387-I 




4700 


15419-9 


15452-7 


15485-5 


15518.3 


15551-1 


15584.0 


15616.8 


15649.6 


15682.4 


15715-2 




4800 


15748.0 


15780.8 


15813.6 


15846.4 


15879-2 


15912.0 


15944.8 


15977-7 


160IO.5 


16043.3 




4900 


16076. 1 


1 6 108.9 


1614T.7 


16174.5 


16207.3 


16240.1 


16272.9 


16305.7 


16338-5 


16371.4 




5000 


16404.2 


16437.0 


16469.8 


16502.6 


16535-4 


16568.2 


1 6601.0 


16633.8 


16666.6 


16699.4 




Ten 


ths of a meter. o.i 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 




Fee 


f- 0.328 0.656 0.984 1.312 1.640 1.968 2.297 2.625 2-953 





Smithsonian Tables. 



43 



Table 1 5. 



MILES INTO KILOMETERS. 

I mile = 1.609347 kilometers. 



Miles. 





. 


2 


3 


4 


5 


6 


7 


8 


9 




km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km 








2 


3 


5 


6 


8 


10 


II 


13 


14 


10 


16 


18 


19 


21 


23 


24 


26 


27 


29 


31 


20 


32 


34 


35 


37 


39 


40 


42 


43 


45 


47 


30 


48 


50 


51 


53 


55 


56 


58 


60 


61 


63 


40 


64 


66 


68 


69 


71 


72 


74 


76 


77 


79 


50 


80 


82 


84 


85 


87 


89 


90 


9^ 


93 


95 


60 


97 


98 


100 


lOI 


103 


105 


106 


108 


109 


III 


70 


113 


114 


116 


117 


119 


121 


122 


124 


126 


127 


80 


129 


130 


132 


134 


135 


137 


138 


140 


142 


143 


90 


145 


146 


148 


150 


151 


153 


154 


156 


158 


159 


100 


161 


163 


164 


166 


167 


169 


171 


172 


174 


175 


no 


177 


179 


180 


182 


183 


185 


187 


1S8 


190 


192 


120 


193 


195 


196 


198 


200 


201 


203 


204 


206 


208 


130 


209 


211 


212 


214 


216 


217 


219 


220 


222 


224 


140 


225 


227 


229 


230 


232 


233 


235 


237 


238 


240 


150 


241 


243 


245 


246 


248 


249 


251 


253 


254 


256 


160 


257 


259 


261 


262 


264 


266 


267 


269 


270 


272 


170 


274 


275 


277 


278 


2S0 


2S2 


283 


285 


2S6 


288 


180 


290 


291 


293 


295 


296 


298 


299 


301 


303 


304 


190 


306 


307 


309 


311 


312 


314 


315 


317 


319 


320 


200 


322 


323 


325 


327 


328 


330 


332 


333 


335 


336 


210 


338 


340 


341 


343 


344 


346 


348 


349 


351 


352 


220 


354 


356 


357 


359 


360 


362 


364 


365 


367 


369 


230 


370 


372 


373 


375 


377 


378 


380 


381 


383 


385 


240 


386 


388 


389 


391 


393 


394 


396 


398 


399 


401 


250 


402 


404 


406 


407 


409 


410 


412 


414 


415 


4^7 


260 


418 


420 


422 


423 


425 


426 


428 


430 


431 


433 


270 


435 


436 


438 


439 


441 


443 


444 


446 


447 


449 


280 


451 


452 


454 


455 


457 


459 


460 


462 


463 


465 


290 


467 


468 


470 


472 


473 


475 


476 


47S 


480 


481 


300 


483 


484 


486 


488 


489 


491 


492 


494 


496 


497 


310 


499 


501 


502 


504 


505 


507 


509 


510 


512 


513 


320 


515 


517 


518 


520 


521 


523 


525 


526 


528 


529 


330 


531 


533 


534 


536 


538 


539 


541 


542 


544 


546 


340 


547 


549 


550 


552 


554 


555 


557 


5,58 


560 


562 


350 


563 


565 


566 


568 


570 


571 


573 


575 


576 


57S 


360 


579 


581 


583 


584 


586 


587 


5S9 


591 


592 


594 


370 


595 


597 


599 


600 


602 


604 


605 


607 


608 


610 


380 


612 


613 


615 


616 


618 


620 


621 


623 


624 


626 


390 


628 


629 


631 


632 


634 


636 


637 


639 


641 


642 


400 


644 


645 


647 


649 


650 


652 


653 


655 


657 


658 


410 


660 


661 


663 


665 


666 


668 


669 


671 


673 


674 


420 


676 


678 


679 


681 


682 


.684 


686 


687 


689 


690 


430 


692 


694 


695 


697 


698 


700 


702 


703 


705 


706 


440 


708 


710 


711 


713 


715 


716 


718 


719 


721 


723 


450 


724 


726 


727 


729 


731 


732 


734 


735 


737 


739 


460 


740 


742 


744 


745 


747 


748 


750 


752 


753 


755 


470 


756 


758 


760 


761 


763 


764. 


766 


768 


769 


771 


480 


772 


774 


776 


778 


779 


781 


782 


784 


785 


787 


490 


789 


790 


792 


793 


795 


797 


798 


800 


801 


803 


500 


805 


806 


808 


809 


811 


813 


814 


816 


818 


819 


510 


821 


822 


824 


826 


827 


829 


830 


832 


834 


835 


520 


837 


8 38 


840 


842 


843 


845 


847 


848 


850 


851 


530 


853 


855 


856 


858 


859 


861 


863 


S64 


866 


867 


540 


869 


871 


872 


874 


875 


877 


879 


880 


882 


884 


550 


885 


887 


888 


890 


892 


S93 


895 


896 


898 


900 



Smithsonian T^ble*. 



44 



MILES INTO KILOMETERS. 



Table 1 5. 



Miles. 





1 2 


3 


4 


5 


6 


7 


8 


9 






km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. ; 




550 


885 


887 


888 


890 


892 


893 


895 


896 


898 


900 




560 


901 


903 


904 


906 


908 


909 


911 


912 


914 


916 




570 


917 


919 


921 


922 


924 


925 


927 


929 


930 


932 




580 


933 


935 


937 


938 


940 


941 


943 


945 


946 


948 




590 


950 


951 


953 


954 


956 


958 


959 


961 


962 


964 




600 


966 


967 


969 


970 


972 


974 


975 


977 


978 


980 




610 


982 


983 


985 


987 


988 


990 


991 


993 


995 


996 




620 


998 


999 


lOOI 


1003 


1004 


1006 


1007 


1009 


ion 


IOI2 




630 


1014 


1015 


1017 


1019 


1020 


1022 


1024 


1025 


1027 


1028 




640 


1030 


1032 


1033 


1035 


1036 


1038 


1040 


1041 


1043 


1044 




650 


1046 


1048 


1049 


105 1 


1053 


1054 


1056 


1057 


1059 


I061 




660 


1062 


1064 


1065 


1067 


1069 


1070 


1072 


1073 


1075 


1077 




670 


1078 


1080 


108 1 


1083 


1085 


1086 


10S8 


1090 


109 1 


1093 




680 


1094 


1096 


1098 


1099 


IIOI 


1 102 


1 104 


1 106 


1 107 


1 109 




690 


mo 


1112 


1114 


1115 


III7 


iiiS 


1 120 


1122 


1123 


II25 




700 


1127 


1128 


1 130 


1131 


II33 


"35 


1 136 


1 138 


1139 


1 141 




710 


1 143 


1 144 


1 146 


1 147 


1 149 


1151 


1152 


1 154 


1156 


ii57 




720 


1159 


1160 


1162 


1 164 


1 165 


1167 


1 168 


1170 


1172 


1173 




730 


1 175 


1 176 


1178 


1 180 


II8I 


1 183 


1184 


1 186 


118S 


1 189 




740 


1191 


1 193 


1 194 


1 196 


II97 


1 199 


1201 


1202 


1204 


1205 




750 


1207 


1209 


1 2 10 


1212 


I2I3 


1215 


1217 


1218 


1220 


1221 




760 


1223 


1225 


1226 


1228 


1230 


1231 


1233 


1234 


1236 


1238 




770 


1239 


1241 


1242 


1244 


1246 


1247 


1249 


1250 


1252 


1254 




780 


1255 


1257 


1259 


1260 


1262 


1263 


1265 


1267 


126S 


1270 




790 


1271 


1273 


1275 


1276 


1278 


1279 


1281 


1283 


1284 


1286 




800 


1287 


1289 


1291 


1292 


1294 


1296 


1297 


1299 


1300 


1302 




810 


1304 


1305 


1307 


1308 


I3I0 


1312 


1313 


1315 


1316 


131S 




820 


1320 


1321 


1323 


1324 


1326 


1328 


1329 


1331 


1333 


1334 




830 


1336 


1337 


1339 


1341 


1342 


1344 


1345 


1347 


1349 


1350 




840 


1352 


1353 


1355 


1357 


1358 


1360 


1362 


1363 


1365 


1366 




850 


1368 


1370 


1371 


1373 


1374 


1376 


1378 


1379 


1381 


1382 




860 


13S4 


1386 


1387 


1389 


1390 


1392 


1394 


1395 


1397 


1399 




870 


1400 


1402 


1403 


1405 


1407 


1408 


1410 


141 1 


1413 


1415 




880 


1416 


1418 


1419 


1421 


1423 


1424 


1426 


1427 


1429 


143 1 




890 


1432 


1434 


1436 


1437 


1439 


1440 


1442 


1444 


1445 


1447 




900 


1448 


1450 


1452 


1453 


1455 


1456 


1458 


1460 


146 1 


1463 




910 


1464 


1466 


1468 


1469 


I47I 


1473 


1474 


1476 


1477 


1479 




920 


1481 


1482 


1484 


14S5 


1487 


1489 


1490 


1492 


1493 


1495 




930 


1497 


1498 


1500 


1502 


1503 


1505 


1506 


1508 


1510 


1511 




940 


1513 


1514 


1516 


1518 


I5I9 


1521 


1522 


1524 


1526 


1527 




950 


1529 


1530 


1532 


1534 


1535 


1537 


1539 


1540 


1542 


1543 




960 


1545 


1547 


1548 


1550 


1551 


1553 


1555 


1556 


1558 


1559 




970 


1561 


1563 


1564 


1566 


1567 


1569 


1571 


1572 


1574 


1576 




980 


1577 


1579 


1580 


1582 


1584 


1585 


1587 


1588 


1590 


1592 




990 


1593 


1595 


1596 


1598 


1600 


1601 


1603 


1605 


1606 


1608 




1000 


1609 


1611 


1613 


1614 


I6I6 


16x7 


1619 


1621 


1622 


1624 






Miles. 


km. 


Miles. 


km. 


Miles. 


km. 


Miles. 


km. 








1000 


1609 


6000 


9656 


II 000 


17703 


16000 


25750 








2000 


3219 


7000 


1 1 265 


12000 


I9312 


17000 


27359 








3000 


4828 


8000 


12875 


13000 


20922 


18000 


28968 








4000 


6437 


9000 


14484 


14000 


22531 


19000 


3057S 








5000 


8047 


10000 


16093 


15000 


24140 


20000 


32187 







8MITH8ONIAN Tables. 



45 



Table 1 6. 



KILOMETERS INTO MILES. 

1 kilometer = 0.621370 mile. 



Kilo- 
meters. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 





0.0 


0.6 


1.2 


1-9 


2.5 


3-1 


3-7 


4.3 


5-0 


5-6 


10 


6.2 


6.8 


7-5 


8.1 


8.7 


9.3 


9.9 


10.6 


11.2 


11.8 


20 


12.4 


13.0 


13-7 


14-3 


14.9 


15.5 


16.2 


16.8 


17.4 


18.0 


30 


18.6 


19.3 


19.9 


20.5 


21. I 


21.7 


22.4 


23.0 


23-6 


24.2 


40 


24.9 


25.5 


26.1 


26.7 


27-3 


28.0 


28.6 


29.2 


29.8 


30-4 


50 


3I-I 


31.7 


32.3 


32-9 


33.6 


34.2 


34-8 


35-4 


36.0 


36-7 


60 


37-3 


37.9 


38-5 


39-1 


39-8 


40.4 


41.0 


41.6 


42.3 


42.9 


70 


43-5 


44.1 


44.7 


45.4 


46.0 


46.6 


47-2 


47.8 


48.5 


49-1 


80 


49-7 


50.3 


51-0 


51.6 


52.2 


52.8 


53.4 


54-1 


54.7 


55-3 


90 


55-9 


56.5 


57-2 


57-8 


58.4 


59.0 


59.7 


60.3 


60.9 


61.5 


100 


62.1 


62.8 


63-4 


64.0 


64.6 


65.2 


65-9 


66.5 


67.1 


67.7 


no 


6S.4 


69.0 


69.6 


70.2 


70.8 


71-5 


72.1 


72.7 


73.3 


73.9 


120 


74.6 


75.2 


75-8 


76.4 


77.0 


77-7 


78.3 


78.9 


79-5 


80.2 


130 


80. S 


81.4 


82.0 


82.6 


83.3 


83.9 


84-5 


85-1 


85.7 


86.4 


140 


87.0 


87.6 


88.2 


88. 9 


89.5 


90.1 


90-7 


91.3 


92.0 


92.6 


150 


93-2 


93-8 


94-4 


95-1 


95.7 


96.3 


96-9 


97-6 


98.2 


98.8 


160 


99-4 


lOO.O 


100.7 


101.3 


101.9 


102.5 


103. 1 


103.8 


104.4 


105.0 


170 


105.6 


106.3 


106.9 


107.5 


108. 1 


108.7 


109.4 


IIO.O 


110.6 


III. 2 


I So 


III. 8 


II2.5 


113. 1 


113-7 


114-3 


115. 


115.6 


116.2 


116.8 


117.4 


190 


118.1 


II8.7 


119.3 


119.9 


120.5 


121. 2 


121. 8 


122.4 


123.0 


123.7 


200 


124.3 


124.9 


125.5 


126. 1 


126.8 


127.4 


128.0 


128.6 


129.2 


129.9 


210 


130.5 


131. 1 


131.7 


132.4 


133-0 


133-6 


134-2 


134.8 


135.5 


136. 1 


220 


136.7 


137.3 


137.9 


138.6 


139.2 


139.8 


140.4 


141. 1 


141.7 


142.3 


230 


142.9 


143.5 


144.2 


144.8 


145-4 


146.0 


146.6 


147-3 


147-9 


148-5 


240 


149. 1 


149.8 


150.4 


151. 


151. 6 


152.2 


152-9 


153-5 


154-1 


154.7 


250 


155.3 


156.0 


156.6 


157.2 


157-8 


158.4 


I59-I 


159.7 


160.3 


160.9 


260 


161. 6 


162.2 


162.8 


163.4 


164.0 


164.7 


165-3 


165.9 


166.5 


167. 1 


270 


167.8 


168.4 


169.0 


169.6 


170.3 


170.9 


171.5 


172.1 


172.7 


173.4 


280 


174.0 


174.6 


175-2 


175.8 


176-5 


177. 1 


177.7 


178.3 


179.0 


179-6 


290 


180.2 


180.8 


181. 4 


182. 1 


182.7 


183.3 


183.9 


184.5 


1S5.2 


185.8 


300 


186.4 


187.0 


187.7 


188.3 


188.9 


189.5 


190. 1 


190.8 


191.4 


[92.0 


310 


192.6 


193.2 


193-9 


194.5 


195- 1 


195.7 


196.4 


197.0 


197.6 


198.2 


320 


198.8 


199.5 


200.1 


200.7 


201.3 


201.9 


202.6 


203.2 


203.8 


204.4 


330 


205.1 


205.7 


206.3 


206.9 


207.5 


208.2 


208.8 


209.4 


210.0 


210.6 


340 


211. 3 


211. 9 


212.5 


213.1 


213.8 


214.4 


215.0 


215.6 


216.2 


216.9 


350 


217-5 


2I8.I 


218.7 


219.3 


220.0 


220.6 


221.2 


221.8 


222.5 


223.1 


360 


223.7 


224.3 


224.9 


225.6 


226.2 


226.8 


227-4 


228.0 


228.7 


229.3 


370 


229.9 


230.5 


231. 1 


231.8 


232.4 


233.0 


233-6 


234.3 


234.9 


235.5 


380 


236.1 


236.7 


237-4 


238.0 


238.6 


239.2 


239.8 


240.5 


241. 1 


241.7 


390 


242.3 


243.0 


243-6 


244.2 


244.8 


245-4 


246.1 


246.7 


247.3 


247.9 


400 


248.5 


249.2 


249.8 


250.4 


251.0 


251-7 


252-3 


252.9 


253.5 


254-1 


410 


254.8 


255.4 


256.0 


256.6 


257.2 


257-9 


258-5 


259. 1 


259-7 


260.4 


420 


261.0 


261.6 


262.2 


262.8 


263-5 


264.1 


264-7 


265-3 


265-9 


266.6 


430 


267.2 


267.8 


268.4 


269.1 


269.7 


270.3 


270.9 


271-5 


272.2 


272.8 


440 


273.4 


274.0 


274-6 


275.3 


275-9 


276.5 


277.1 


277-8 


278.4 


279.0 


450 


279.6 


280.2 


280.9 


281.5 


282.1 


282.7 


283-3 


284.0 


284.6 


285.2 


460 


285.8 


286.5 


287.1 


287.7 


288.3 


288.9 


■ 289.6 


290.2 


290.8 


291.4 


470 


292.0 


292.7 


293-3 


293.9 


294-5 


295.2 


295-8 


296.4 


297.0 


297.6 


480 


29S.3 


298.9 


299-5 


300.1 


300.7 


301.4 


302.0 


302.6 


303.2 


303-8 


490 


304.5 


305-1 


305-7 


306.3 


307.0 


307.6 


308.2 


308.8 


309.4 


310. 1 


500 


310.7 


311-3 


3". 9 


312.5 


313.2 


313-8 


314-4 


315-0 


315-7 


316.3 


510 


316.9 


317.5 


318.1 


318.8 


319.4 


320.0 


320.6 


321.2 


321.9 


322.5 


520 


323. 1 


323-7 


324.4 


325-0 


325-6 


326.2 


326.8 


327-5 


328.1 


328.7 


530 


329.3 


329.9 


330.6 


331-2 


331-8 


332.4 


333-1 


333.7 


334.3 


334-9 


540 


335-5 


336-2 


336.8 


337-4 


338-0 


338.6 


339-3 


339-9 


340.5 


34I-I 



8mith«onian Table*. 



46 



KILOMETERS INTO MILES. 



Table 1 6. 



Kilo- 
meters. 





1 2 

1 


3 


4 


5 


6 


7 


8 


9 




Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Miles. 


Mile . 


Miles. 


550 


341.8 


342.4 


343-0 


343-6 


344-2 


344-9 


345-5 


346.1 


346-7 


347-3 


560 


348.0 


348.6 


349-2 


349-8 


350-5 


351-I 


351-7 


352-3 


352.9 


353-6 


570 


354-2 


354-8 


355-4 


356-0 


356.7 


357-3 


357-9 


358.5 


359-2 


359-8 


580 


360.4 


361.0 


361.6 


362.3 


362.9 


363-5 


364.1 


364-7 


365-4 


366.0 


590 


366.6 


367-2 


367-9 


368.5 


369- 1 


369-7 


370.3 


371.0 


371.6 


372.2 


600 


372.8 


373-4 


374-1 


374-7 


375-3 


375-9 


376-6 


377-2 


377-8 


378.4 


610 


379-0 


379-7 


380-3 


380.9 


381-5 


382.1 


382.8 


383.4 


384-0 


384-6 


620 


3852 


385-9 


3S6.5 


387.1 


387-7 


388.4 


389-0 


389.6 


390.2 


390.8 


630 


391-5 


392.1 


392-7 


393-3 


393-9 


394-6 


395-2 


395-8 


396-4 


397-1 


640 


397-7 


398-3 


398.9 


399.5 


400.2 


400.8 


401.4 


402.0 


402.6 


403-3 


650 


403-9 


404-5 


405.1 


405.8 


406.4 


407.0 


407.6 


408.2 


40S.9 


409-5 


660 


410. 1 


410.7 


411.3 


412.0 


412.6 


413.2 


413-8 


414-5 


415-I 


415-7 


670 


416.3 


416.9 


417.6 


418.2 


418.8 


419.4 


420.0 


420.7 


421.3 


421.9 


680 


422.5 


423.2 


423.8 


424.4 


425-0 


425.6 


426.3 


426.9 


427-5 


428.1 


690 


428.7 


429.4 


430.0 


430.6 


431.2 


431-9 


432.5 


433-1 


433-7 


434-3 


700 


435-0 


435-6 


436.2 


436.8 


437.4 


438.1 


438.7 


439-3 


439-9 


440.6 


710 


441.2 


441.8 


442-4 


443-0 


443.7 


444.3 


444.9 


445-5 


446.1 


446.8 


720 


447-4 


448.0 


448.6 


449-3 


449.9 


450.5 


451.1 


451-7 


452.4 


453- 


730 


453-6 


454-2 


454-8 


455-5 


456.1 


456.7 


457-3 


457-9 


458.6 


459-2 


740 


459-8 


460.4 


461. 1 


461.7 


462.3 


462.9 


463-5 


464.2 


464.8 


465-4 


750 


466.0 


466.6 


467-3 


467.9 


468.5 


469.1 


469.8 


470.4 


471.0 


471.6 


760 


472.2 


472.9 


473-5 


474.1 


474.7 


475-3 


476.0 


476.6 


477.2 


477-8 


770 


478.5 


479-1 


479-7 


480.3 


480.9 


481.6 


482.2 


482.8 


483-4 


484.0 


780 


484.7 


485-3 


485.9 


486.5 


487.2 


487.8 


488.4 


489.0 


489.6 


490-3 


790 


490.9 


491-5 


492.1 


492.7 


493.4 


494.0 


494.6 


495-2 


495-9 


496-5 


800 


497-1 


497-7 


498.3 


499.0 


499.6 


500.2 


500.8 


501.4 


502.1 


502.7 


810 


503-3 


503.9 


504.6 


505.2 


505.8 


506.4 


507.0 


507.7 


508.3 


508.9 


820 


509-5 


510.1 


510.8 


511. 4 


512.0 


512.6 


513.3 


513-9 


514-5 


5151 


830 


515-7 


516.4 


517.0 


517.6 


518.2 


518.8 


519.5 


520.1 


520.7 


521.3 


840 


522.0 


522.6 


523.2 


523.8 


524.4 


525.1 


525.7 


526.3 


526.9 


527.5 


850 


528.2 


528.S 


529.4 


530-0 


530.6 


531.3 


531.9 


532-5 


533-1 


533.8 


S60 


534-4 


535-0 


535.6 


536.2 


536.9 


537.5 


538.1 


538.7 


539-3 


540.0 


870 


540.6 


541.2 


541.8 


542-5 


543-1 


543-7 


544.3 


544.9 


545-6 


546.2 


880 


546-8 


547-4 


548.0 


548-7 


549-3 


549-9 


550.5 


551.2 


551-8 


552.4 


890 


553-0 


553-6 


554.3 


554-9 


555-5 


556.1 


556.7 


557-4 


558-0 


558.6 


900 


559-2 


559-9 


560.5 


561. 1 


561.7 


562.3 


563.0 


563.6 


564.2 


564-8 


910 


565.4 


566.1 


566.7 


567-3 


567.9 


568.6 


569.2 


569.8 


570.4 


571-0 


920 


571-7 


572-3 


572.9 


573-5 


574-1 


574-8 


575.4 


576.0 


576.6 


577-3 


930 


577-9 


578-5 


579-1 


579-7 


580.4 


581.0 


581.6 


582.2 


582.8 


583-5 


940 


5S4.1 


584-7 


585-3 


5S6.0 


586.6 


587-2 


587.8 


588.4 


589.1 


589-7 


950 


590-3 


590-9 


591-5 


592.2 


592-8 


593-4 


594-0 


594.7 


595-3 


595-9 


960 


596.5 


597-1 


597-8 


598.4 


599.0 


599-6 


600.2 


600.9 


601.5 


602.1 


970 


602.7 


603.4 


604.0 


604.6 


605.2 


605.8 


606.5 


607.1 


607.7 


608.3 


980 


608.9 


609.6 


610.2 


610.8 


611. 4 


612.0 


612.7 


613-3 


613.9 


614.5 


990 


615.2 


615-8 


616.4 


617.0 


617.6 


618.3 


618.9 


619-5 


620.1 


620.7 


1000 


621.4 


622.0 


622.6 


623.2 


623.9 


624.5 


625.1 


625.7 


626.3 


627.0 




km. 


Miles. 


km. 


Mil( 


;s. 


km. 


M 


iles. 


km. 


Miles. 






1000 


621.^ 


[ 6000 


3725 


5.2 


II 000 


68 


35-1 


16000 


9941.9 






2000 


1242.: 


^ 7000 


434c 


)-6 


12000 


74 


56.4 


17000 


10563.3 






3000 


1S64.] 


8000 


497] 


.0 


13000 


8c 


77-8 


18000 


1 1 184. 7 






4000 


2485-; 


, 9000 


5592 


•-3 


14000 


86 


99-2 


19000 


1 1806.0 






5000 


3106.J 


i 10000 


621: 


i-7 


15000 


93 


20.5 


20000 


12427.4 





Smithsohian Tables. 



47 



Table 1 7. 

INTERCONVERSION OF NAUTICAL AND STATUTE MILES. 

I nautical mile* = 6080.20 feet. 



Nautical Miles. 


1 
Statute Miles. 


Statute Miles. 


Nautical Miles. 


1 

2 

3 

4 

5 

6 

7 
8 

9 


1.1516 

2.3031 
3-4547 
4.6062 

5-7578 
6.9093 
8.0609 
9.2124 
10.3640 


1 
2 

3 

4 

5 

6 

7 
8 

9 


0.8684 
1.7368 
2.6052 
3-4736 

4.3420 
5.2104 
6.0787 
6.9471 
7-8155 



* As defined by the United States Coast Survey. 



Table 1 8. 

CONTINENTAL MEASURES OF LENGTH WITH THEIR METRIC AND 
ENGLISH EQUIVALENTS. 

The asterisk (*) indicates that the measure is obsolete or seldom used. 



Measure. 



El (Netherlands) 

Fathom, Swedish = 6 feet 

Foot, Austrian* 

old French* 

Russian 

Rheinlandisch or Rhenish (Prussia^ 
Denmark, Norway*). 

Swedish* 

Spanish* = ^ vara 

*Klafter, Wiener (Vienna) 

*Line, old French =^ — foot 

144 

Mile, Austrian post* = 24000 feet 

German sea 

Swedish = 36000 feet 

Norwegian = 36000 feet 

Netherlands (mijl) 

Prussian (law of 1868) 

Danish 

Palm, Netherlands 

*Rode, Danish 

*Ruthe, Prussian, Norwegian 

Sagene (Russian) 

*Toise, old French = 6 feet 

*Vara, Spanish • . . 

Mexican 

Werst, or versta (Russian) ^ 500 sashjene 



Metric Equivalent. 


English Equivalent. 


I 


meter. 


3.2808 feet. 


1.7814 


" 


5.8445 " 


0.31608 


" 


1.0370 " 


0.32484 


" 


1.0657 " 


0.30480 


" 


I 


0.31385 


" 


1.0297 " 


0.2969 


" 


0.9741 " 


0.2786 


" 


0.9140 " 


1.89648 


" 


6.2221 " 


0.22558 


cm. 


0.0888 inch. 


7-58594 


km. 


4.714 statute miles. 


1.852 


" 


1. 1508 " 


10.69 


" 


6.642 


11.2986 


" 


7.02 " " 


I 


" 


0.6214 " " 


7.500 


" 


4.660 


7-5324 


" 


4.6804 " " 


0.1 


meter. 


0.3281 feet 


3.7662 . 


" 


12.356 •• 


3.7662 


" 


12.356 " 


2.1336 


" 


7 


1.9490 


" 


6-3943 " 


0.8359 


" 


2.7424 " 


0.8380 


" 


2.7493 " 


1.0668 


km. 


3.500 " 



SmiTffSONiAN Tables. 



48 



CONVERSION OF MEASURES OF TIME AND ANGLE. 



Arc into time Table ig 

Time into arc Table 20 

Days into decimals of a year and angle Table 21 

Hours, minutes and seconds into decimals of a day .... Table 22 

Decimals of a day into hours, minutes and seconds .... Table 23 

Minutes and seconds into decimals of an hour Table 24 

Local mean time at apparent noon Table 25 

Sidereal time into mean solar time Table 26 

Mean solar time into sidereal time = . - o . , . . . . Table 27 



Table 1 9. 



ARC INTO TIME. 



o 


h. m. 





h. m. 





h. m. 





h m. 





h. m. 





h. m. 


/ 


m. s. 


// 


s. 






I 

2 

3 
4 
5 
6 

7 
8 

9 



4 
8 
12 
16 
20 
24 
28 
032 
36 


60 

61 
62 

63 
64 
65 

66 

67 
68 
69 


4 
4 4 
4 8 
4 12 
4 16 
4 20 
424 
4 28 
432 
436 


120 

121 
122 
123 
124 
125 
126 
127 
128 
129 


8 
8 4 
8 8 
8 12 
8 16 
8 20 
8 24 
828 
832 
836 


180 

181 
182 
1S3 
1S4 
185 
1 86 
187 
188 
189 


12 
12 4 
12 8 
12 12 
12 16 
12 20 
12 24 
12 28 
12 32 
12 36 


240 

241 
242 
243 
244 
245 
246 

247 
248 

249 


16 
16 4 
16 8 
16 12 
16 16 
;6 20 
16 24 
1628 
1632 
1636 


300 

301 
302 
303 
304 
305 
306 

307 
308 

309 


20 
20 4 
20 8 
20 12 
20 16 
20 20 
20 24 
20 28 
2032 
20 36 
20 40 




I 
2 

\ 

I 
6 

7 
8 

9 
10 



4 
8 
12 
16 
20 
24 
28 
032 
036 
40 




I 
2 
3 
4 
5 
6 

7 
8 

9 


0.000 
0.067 

0.133 
0.200 
0.267 i 

0.333 
0.400 
0.467 

0.533 
0.600 




10 


40 


70 


440 


130 


8 40 


190 

191 
192 

193 
194 
195 
196 
197 
198 
199 
200 


12 40 


250 


16 40 


310 


10 


0.667 




II 

12 

13 
14 
15 
i6 

17 
i8 

19 


044 

48 
052 
056 

1 

I 4 
I 8 
I 12 
116 


71 
72 
73 
74 
75 
76 
77 
78 
79 


4 44 
448 

452 
456 

5 
5 4 
5 8 
5 12 
5 16 


131 
132 

133 
134 
135 

136 

137 
138 
139 


844 

8 48 
852 
856 

9 
9 4 
9 8 
9 12 
9 16 
9 20 


1244 
12 48 
12 52 

12 56 

13 
13 4 
13 8 
13 12 
13 16 


251 
252 

253 
254 
255 
256 
257 
258 
259 
260 


1644 

16 48 
1652 
1656 

17 
17 4 
17 8 
17 12 
17 16 


3ii 
312 

313 
.314 
315 
316 
317 
318 
319 


2044 

20 48 
2052 
2056 

21 
21 4 
21 8 
21 12 
21 16 


II 
12 
13 
14 
15 
16 

17 

18 

19 


044 

48 
052 
056 

1 

I 4 
I 8 
I 12 
I 16 
I 20 


II 
12 
13 
14 
15 
16 

17 
18 

59 

20 


0.733 
0.800 
0.867 

0.933 
1. 000 
1.067 

I-I33 
1.200 
1.267 




20 


I 20 


80 


5 20 


140 


13 20 


17 20 


320 


21 20 
21 24 
21 28 
21 32 
21 36 
21 40 
21 44 
21 48 
21 52 
21 56 


1 20 


1-333 




21 
22 

23 

24 

25 

26 

27 
28 
29 


I 24 
I 28 
I 32 

136 

I 40 
I 44 
148 
I 52 
156 


5l 
82 
S3 
84 
85 
86 

87 
88 

89 


524 
528 
532 
536 
5 40 
5 44 
548 
552 
556 


141 
142 

143 
144 
145 

146 

147 
148 

149 


924 
928 

932 
936 
940 

9 44 
948 
952 
956 


201 
202 
203 
204 
205 
206 
207 
208 
209 


13 24 
13 28 

1332 
1336 
1340 
1344 
1348 
1352 
1356 


261 
262 
263 
264 
265 
266 
267 
268 
269 


17 24 
17 28 
17 32 
17 36 
1740 

1744 
1748 

1752 
17 56 


321 
322 
323 
324 
325 
326 

327 
328 

329 


21 
22 
23 
24 
25 
26 

27 
28 

29 


I 24 
I 28 
I 32 

136 
I 40 
I 44 
I 48 
I 52 
156 


21 

22 
23 
24 
25 

26 

27 

28 
29 


1.400 
1.467 

1-533 
1.600 
1.667 

1-733 
1.800 
1.867 
1-933 




30 

31 

32 

33 
34 
35 

36 
37 
3S 
39 


2 


90 


6 


150 


10 


210 


14 


270 


18 


330 


22 


1 30 


2 


30 


2.000 




2 4 
2 8 
2 12 
2 16 
2 20 
224 
2 28 
2 32 
2 36 


91 
92 
93 
94 
95 
96 

97 
98 

99 


6 4 
6 8 
6 12 
6 16 
6 20 
624 
628 
632 
636 


151 
152 
153 
154 
155 
156 
157 
158 
159 


10 4 
10 8 
10 12 
10 16 
10 20 
10 24 
1028 
1032 
1036 


211 
212 
213 
214 
215 
216 
217 
218 
219 
220 


14 4 
14 8 
14 12 
14 16 
14 20 
1424 
1428 
1432 
1436 


271 

272 

273 
274 
275 

276 
277 
278 
279 


18 4 
18 8 
18 12 
18 16 
18 20 
1824 
1828 
1832 
18 36 


331 
332 
333 
334 
335 
336 
337 
338 
339 


22 4 
22 8 
22 12 
22 16 
22 20 
22 24 
22 28 
2232 
2236 


31 
32 
33 
34 
35 
36 
■37 
38 
39 
40 

41 
42 
43 
44 
45 
46 
47 
48 
49 


2 4 
2 8 
2 12 
2 16 
2 20 
2 24 
2 28 
232 
236 


31 
32 
33 
34 
35 
36 
37 
38 
39 
40 


2.067 

2-133 
2.200 
2.267 

2.333 
2.400 
2.467 

2-533 
2.600 




40 


2 40 


100 


6 40 


160 


10 40 


1440 


280 


18 40 


340 


22 40 


2 40 


2.667 




41 
42 
43 
44 
45 
46 
47 
48 
49 


244 
248 
252 
256 
3 
3 4 
3 8 
3 12 
316 


lOI 

102 
103 
104 
105 

106 
107 
108 
109 


644 
648 

6 52 
656 

7 
7 4 
7 8 
7 12 
716 


161 
162 
163 
164 
165 
166 
167 
168 
169 


1044 

10 48 
1052 
1056 

11 
II 4 
II 8 
II 12 
II 16 


221 
222 
223 
224 
225 
226 
227 
228 
229 


1444 
1448 
1452 
1456 
15 
15 4 
15 8 
15 12 
15 16 


281 
2S2 
283 
284 
285 
2S6 
287 
28S 
289 


1844 
1848 
1852 
1856 
19 
19 4 
19 8 
19 12 
19 16 


341 
342 
343 
344 
345 
346 
347 
348 
349 


2244 
2248 
2252 

22 56 

23 
23 4 
23 8 
23 12 
23 16 


244 
248 
252 
256 
3 
3 4 
3 8 
3 12 
316 


41 
42 
43 
44 
45 
46 
47 
48 
49 


2-733 
2.800 
2.867 

2.933 
3.000 
3.067 

3-133 
3.200 
3-267 




50 


3 20 


no 


7 20 


170 


II 20 


230 


15 20 


290 


19 20 


350 


23 20 

2324 
2328 
2332 
2336 
2340 

2344 
2348 
2352 
-'3 56 


50 


3 20 


50 


3-333 




51 
52 
53 
54 
55 
56 
57 
58 
59 
60 


3 24 
328 

332 
336 
340 
3 44 
348 
352 
356 


III 
112 

113 
114 

115 

116 
117 
118 
119 


724 
728 
732 
736 
740 
7 44 
748 
752 
756 


171 
172 
173 
174 
175 
176 
177 
178 
179 


II 24 
II 28 
II 32 
II 36 
II 40 
II 44 
II 48 
II 52 
II 56 


231 
232 
233 
234 
235 
236 
237 
238 
239 


15 24 
15 28 

1532 
1536 
1540 
1544 
1548 
1552 
1556 


291 
292 
293 
294 
295 
296 

297 
298 

299 


1924 
1928 
1932 
1936 
1940 
1944 
1948 
1952 
1956 


351 

i52 

353 
354 
355 
356 
357 
358 
35^. 


51 
52 
53 
54 
55 
56 
57 
58 
59 
60 


3 24 
3 28 
332 
336 
340 
3 44 
348 
352 
356 


51 
52 
53 
54 
55 
56 
57 
58 
59 
60 


3-400 
3-467 
3-533 ' 
3.600 
3.667 

3-733 ! 

3.800 

3.867 

3-933 

4.000 




4 


120 


8 


180 


12 


240 


16 


300 


20 


360 


24 


4 





Smithsonian Tables. 



SO 



TIME INTO ARC. 



Table 20. 



Hours into Arc. 


Time. 


Arc. 


Time. 


Arc. 


Time. 


Arc. 


Time. 


Arc. 


Time. 


Arc. 


Time. 


Arc. 


hrs. 





hrs. 





hrs. 





hrs. 





his. 





hrs. 





1 


15 


5 


75 


9 


135 


13 


195 


17 


255 


21 


315 


2 


30 


6 


90 


10 


150 


14 


210 


18 


270 


22 


330 


3 


45 


7 


105 


II 


165 


15 


225 


19 


2S5 


23 


345 


4 


60 


8 


120 


12 


180 


16 


240 


20 


300 


24 


360 


Minutes of Time into Arc. 




Seconds of 


Time into Arc. 


m. 


/ 


m. 


/ 


m. 


/ 


s. 


/ // 


s 


/ // 


s. 


/ // 


1 


15 


21 


5 15 


41 


10 15 


1 


15 


21 


5 15 


41 


10 15 


2 


30 


22 


5 30 


42 


10 30 


2 


30 


22 


5 30 


42 


10 30 


3 


45 


23 


5 45 


43 


10 45 


3 


45 


23 


5 45 


43 


10 45 


4 


I 


24 


6 


44 


II 


4 


I 


24 


6 


44 


II 


5 


I 15 


25 


6 15 


45 


II 15 


5 


I 15 


25 


6 15 


45 


II 15 


6 


I 30 


26 


6 30 


46 


II 30 


6 


I 30 


26 


6 30 


46 


II 30 


7 


I 45 


27 


6 45 


47 


II 45 


7 


I 45 


27 


6 45 


47 


II 45 


8 


2 


28 


7 


48 


12 


8 


2 


28 


7 


48 


12 


9 


2 15 


29 


7 15 


49 


12 15 


9 


2 15 


29 


7 15 


49 


12 15 


10 


2 30 


30 


7 30 


50 


12 30 


10 


2 30 


30 


7 30 


50 


12 30 


II 


2 45 


31 


7 45 


51 


12 45 


II 


2 45 


31 


7 45 


51 


12 45 


12 


3 


32 


8 


52 


13 


12 


3 


32 


8 


52 


13 


13 


3 15 


33 


8 15 


53 


13 15 


13 


3 15 


33 


8 15 


53 


13 15 


14 


3 30 


34 


8 30 


54 


13 30 


14 


3 30 


34 


8 30 


54 


13 30 


15 


3 45 


35 


8 45 


55 


13 45 


15 


3 45 


35 


8 45 


55 


13 45 


i6 


4 


36 


9 


56 


14 


16 


4 


36 


9 


56 


14 


17 


4 15 


37 


9 15 


57 


14 15 


17 


4 15 


37 


9 15 


57 


14 15 


i8 


4 30 


38 


9 30 


58 


14 30 


18 


4 30 


38 


9 30 


58 


14 30 


19 


4 45 


39 


9 45 


59 


14 45 


19 


4 45 


39 


9 45 


59 


14 45 


20 


5 


40 


10 


60 


15 


20 


5 


40 


10 


60 


15 


Hundredths of a Second 


of Time into 


Arc. 


1 


Hundredths 






















1 of a Sec- 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 


ond of Time. 






















s. 












^* 


,, 


„ 


y^ 


,, 


0.00 


0.00 


0.15 


0.30 


0.45 


0.60 


0.75 


0.90 


1.05 


1.20 


1-35 


.10 


1.50 


1.65 


1.80 


1-95 


2.10 


2.25 


2.40 


2-55 


2.70 


2.85 


.20 


3.00 


3-15 


3-30 


3-45 


3.60 


3-75 


3-90 


4-05 


4.20 


4-35 


•30 


4-50 


4-65 


4.80 


4-95 


5- 10 


5-25 


5-40 


5-55 


5-70 


5-85 


.40 


6.00 


6.15 


6.30 


6.45 


6.60 


6.75 


6.90 


7-05 


7.20 


7-35 


0.50 


7-50 


7.65 


7.80 


7-95 


8.10 


8.25 


8.40 


8.55 


8.70 


8.85 


.60 


9.00 


9-15 


9-30 


9-45 


9.60 


9-75 


9.90 


10.05 


10.20 


10.35 


.70 


10.50 


10.65 


10.80 


10.95 


II. 10 


11.25 


11.40 


11-55 


11.70 


11.85 


.80 12.00 


12.15 


12.30 


12.45 


12.60 


12.75 


12.90 


13-05 


13.20 


13-35 


.90 13-50 

1 


13-65 


13.80 


13-95 


14.10 


14-25 


14.40 


14-55 


14.70 


14.85 



Smithsonian Tables. 



51 



Table 21 . 



DAYS INTO DECIMALS OF A YEAR AND ANGLE. 










Day of 


Month. 






- - 


Day of 


Month. 


Day 


Decimal 








Day 


Decimal 








of 


of 


Angle. 






of 


of 


Angle. 






Year. 


a Year. 




Common 
Year. 


Bissextile 
Year. 


Year. 


a Year. 




Common 
Year. 


Bissextile 
Year. 


1 


0.00000 


0° 0' 


Jan. I 


/an. I 


51 


0.13689 


49° 17' 


Feb. 20 


Feb. 20 


2 


.00274 


59 


2 


2 


52 


.13963 


50 16 


21 


21 


3 


.00548 


I 58 


3 


3 


53 


•14237 


51 15 


22 


22 


4 


.00821 


2 57 


4 


4 


54 


.14511 


52 14 


23 


23 


5 


0.01095 


3 57 


5 


5 


55 


0. 14784 


53 13 


24 


24 


6 


.01369 


4 56 


6 


6 


56 


•15058 


54 13 


25 


25 


7 


.01643 


5 55 


7 


7 


57 


•15332 


55 12 


26 


26 


8 


.01916 


6 54 


8 


8 


58 


.15606 


56 II 


27 


27 


9 


.02190 


7 53 


9 


9 


59 


.15S80 


57 10 


28 


28 


10 


0.02464 


8 52 


10 


10 


60 


0.16153 


58 9 


Mar. I 


29 


II 


.02738 


9 51 


II 


II 


61 


.16427 


59 8 


2 


Mar. I 


12 


.03011 


10 51 


12 


12 


62 


.16701 


60 7 


3 


2 


13 


.03285 


II 50 


13 


13 


63 


•16975 


61 7 


4 


3 


14 


•03559 


12 49 


14 


14 


64 


.17248 


62 6 


5 


4 


15 


0.03833 


13 48 


15 


15 


65 


0.17522 


63 5 


6 


5 


i6 


.04107 


14 47 


16 


16 


66 


.17796 


64 4 


7 


6 


17 


.04381 


15 46 


17 


17 


67 


.18070 


65 3 


8 


7 


i8 


.04654 


16 45 


18 


18 


68 


.18344 


66 2 


9 


8 


19 


.04928 


17 44 


19 


19 


69 


.18617 


67 I 


10 


9 


20 


0.05202 


18 44 


20 


20 


70 


0.1 889 1 


68 


II 


10 


21 


.05476 


19 43 


21 


21 


71 


.19165 


69 


12 


II 


22 


■05749 


20 42 


22 


22 


t 72 


•19439 


69 59 


13 


12 


23 


.06023 


21 41 


23 


23 


73 


•I9713 


70 58 


14 


13 


24 


.06297 


22 40 


24 


24 


74 


.19986 


71 57 


15 


14 


25 


0.06571 


23 39 


25 


25 


75 


0.20260 


72 56 


16 


15 


26 


.06845 


24 38 


26 


26 


76 


•20534 


73 55 


17 


16 


27 


.07118 


25 38 


27 


27 


i 77 


.20808 


74 54 


18 


17 


28 


.07392 


26 37 


28 


28 


78 


.21081 


75 54 


19 


18 


29 


.07666 


27 36 


29 


29 


! 79 


•21355 


76 53 


20 


19 


30 


0.07940 


28 35 


30 


30 


80 


0.21629 


77 52 


21 


20 


31 


.08214 


29 34 


31 


31 


81 


.21903 


T<^ 5^ 


22 


21 


3- 


.084S7 


30 2>2> 


Fed. I 


Feb. I 


82 


.22177 


79 50 


23 


22 


33 


.0S761 


31 32 


2 


2 


' 83 


.22450 


80 49 


24 


23 


34 


.09035 


32 32 


3 


3 


1 84 


.22724 


81 48 


25 


24 


35 


0.09309 


33 31 


4 


4 


85 


0.22998 


82 48 


26 


^1 


36 


.09582 


34 30 


5 


5 


86 


.23272 


83 47 


27 


26! 


37 


.09856 


35 29 


6 


6 


87 


•23546 


84 46 


28 


27 1 


3S 


.10130 


36 28 


7 


7 


88 


.23819 


85 45 


29 


28 i 


39 


.10404 


37 27 


8 


8 


89 


.24093 


86 44 


30 


29 


40 


0.10678 


38 26 


9 


9 


90 


0.24367 


87 43 


31 


301 


41 


.XO951 


39 26 


10 


10 


91 


■.24641 


88 42 


Apr. I 


. 3^ 


42 


.11225 


40 25 


II 


II 


92 


.24914 


89 42 


2 


Apr. I 


43 


.11499 


41 24 


12 


12 


93 


.25188 


90 41 


3 


2 


44 


•II773 


42 23 


13 


13 


94 


.25462 


91 40 


4 


3 


45 


0.12047 


43 22 


14 


14 


95 


0.25736 


92 39 


5 


4 


46 


.12320 


44 21 


15 


15 


96 


.26010 


93 38 


6 


5 


47 


.12594 


45 20 


16 


16 


97 


.26283 


94 37 


7 


6 


48 


.12868 


46 19 


17 


17 


98 


■26557 


95 36 


8 


7 


49 


.13142 


47 19 


18 


18 


99 


.26831 


96 35 


9 


8 


50 


0.13415 


48 18 


19 


19 


100 


0.27105 


97 35 


10 


9 



Smithsonian Tables. 



52 



Table 21 , 



DAYS INTO DECIMALS OF A YEAR AND ANGLE. 



I- 






Day of Month. 








Day of Month. 




Day 


Decimal 








Day 


Decimal 










of 


ot 


Angle. 






ot 


of 


Angle. 








Year. 


a Year. 




Common 
Year. 


Bissextile 
Year. 


Year. 


a Year. 




Common 
Year. 


Bissextile 
Year. 




101 


0.27379 


98° 34' 


Apr. II 


Apr. 10 


151 


0.41068 


I47°5i' 


May 31 


May -yy 




I02 


.27652 


99 33 


12 


II 


152 


.41342 


148 50 


June I 


r 31 




103 


.27926 


100 32 


13 


12 


153 


.41615 


149 49 


2 


June I 




104 


.28200 


loi 31 


14 


13 


154 


.418S9 


150 48 


3 


2 




105 


0.28474 


102 30 


15 


14 


155 


0.42163 


151 47 


4 


3 




106 


•28747 


103 29 


16 


15 


156 


•42437 


152 46 


5 


4 




107 


. 2902 1 


104 29 


17 


16 


157 


.42710 


153 45 


6 


5 




108 


.29295 


105 28 


18 


17 


158 


.42984 


154 45 


7 


6 




109 


.29569 


106 27 


19 


18 


159 


•43258 


155 44 


8 


7 




no 


0.29843 


107 26 


20 


19 


160 


0.43532 


156 43 


9 


8 




III 


.30116 


108 25 


21 


20 


161 


.43806 


157 42 


10 


9 




112 


.30390 


109 24 


22 


21 


162 


.44079 


158 41 


II 


10 




113 


.30664 


no 23 


23 


22 


163 


•44353 


159 40 


12 


II 




114 


•30938 


III 23 


24 


23 


164 


.44627 


160 39 


13 


12 




115 


0.31211 


112 22 


25 


24 


165 


0.44901 


161 39 


14 


13 




116 


•31485 


113 21 


26 


25 


166 


•45175 


162 38 


15 


14 




117 


•31759 


114 20 


27 


26 


167 


•45448 


163 37 


16 


15 




118 


•32033 


115 19 


28 


27 


168 


•45722 


164 36 


17 


16 




119 


.32307 


116 18 


29 


28 


169 


•45996 


165 35 


18 


17 




120 


0.32580 


117 17 


30 


29 


170 


0.46270 


166 34 


19 


18 




121 


.32854 


118 17 


May I 


30 


\r- 


•46543 


167 33 


20 


19 




122 


•33128 


119 16 


2 


May I 


172 


.46817 


168 33 


21 


20 




123 


.33402 


120 15 


3 


2 


173 


.47091 


169 32 


22 


21 




124 


•33676 


121 14 


4 


3 


174 


•47365 


170 31 


23 


22 




125 


0.33949 


122 13 


5 


4 


175 


0.47639 


171 30 


24 


23 




126 


•34223 


123 12 


6 


5 


176 


.47912 


172 29 


25 


24 




127 


•34497 


124 II 


7 


6 


177 


.48186 


173 28 


26 


25 




128 


34771 


125 10 


8 


7 


178 


.48460 


174 27 


27 


26 




129 


•35044 


126 10 


9 


8 


179 


•48734 


175 26 


28 


27 




130 


0.35318 


127 9 


ID 


9 


180 


0. 49008 


176 26 


29 


28 




131 


•35592 


128 8 


II 


10 


181 


.49281 


177 25 


. , 3° 


29 




132 


.35866 


129 7 


12 


II 


182 


•49555 


178 24 


July I 


. / 3° 




133 


.36140 


130 6 


13 


12 


183 


.49829 


179 23 


2 


July I 




134 


•36413 


131 5 


14 


13 


184 


.50103 


180 22 


3 


2 




135 


0.366S7 


132 4 


15 


14 


185 


0.50376 


181 21 


4 


3 




136 


.36961 


133 4 


16 


15 


186 


.50650 


182 20 


5 


4 




137 


•37235 


134 3 


17 


16 


187 


•50924 


183 20 


6 


5 




138 


.37509 


135 2 


iS 


17 


188 


.51198 


184 19 


7 


6 




139 


.37782 


136 I 


19 


18 


189 


•51472 


185 18 


8 


7 




140 


0.38056 


137 


20 


19 


190 


0.51745 


186 17 


9 


8 




141 


•38330 


137 59 


21 


20 


191 


.52019 


187 16 


10 


9 




142 


.38604 


138 58 


22 


21 


192 


.52293 


188 15 


II 


10 




143 


•38877 


139 58 


23 


22 


193 


•52567 


189 14 


12 


II 




144 


•39151 


140 57 


24 


23 


194 


.52841 


190 14 


13 


12 




145 


0.39425 


141 56 


25 


24 


195 


0.53114 


191 13 


14 


13 




146 


.39699 


142 55 


26 


25 


196 


.53388 


192 12 


15 


14 




147 


.39973 


143 54 


27 


26 


197 


.53662 


193 II 


16 


15 




148 


.40246 


144 53 


28 


27 


198 


.53936 


194 10 


17 


16 




149 


.40520 


145 52 


29 


28 


199 


.54209 


195 9 


18 


17 




150 


0.40794 


146 51 


30 


29 


200 


0.54483 


196 8 


19 


18 




QiiyHso 


Ni»N Tables. 





















53 



Table 21 



DAYS INTO DECIMALS OF A YEAR AND ANGLE. 









Day of 


Month. 








Day of Month. 


Day 


Decimal 








Day 


Decimal 






1 


of 


of 


Angle. 






of 


of 


Angle. 




1 


Year. 


a Year. 




Common 
Year. 


Bissextile 
Year. 


Year. 


a Year. 




Common 
Year. 


Bissextile 
Year. 


201 


0.54757 


197° 8' 


July 20 


July 19 


251 


0.68446 


246° 24' 


Sept. 8 


Sept. 7 


202 


•55031 


198 7 


21 


20 


252 


.68720 


247 24 


9 


8 


203 


•55305 


199 6 


22 


21 


253 


.68994 


248 23 


10 


9 


204 


•55578 


200 5 


23 


22 


254 


.69268 


249 22 


II 


10 


205 


0.55852 


201 4 


24 


23 


255 


0.69541 


250 21 


12 


II 


206 


.56126 


202 3 


25 


24 


256 


.69815 


251 20 


13 


12 ' 


207 


.56400 


203 2 


26 


25 


257 


.700S9 


252 19 


14 


13 


208 


.56674 


204 I 


27 


26 


258 


.70363 


253 18 


15 


14 


209 


•56947 


205 I 


28 


27 


259 


.70637 


254 17 


16 


15 


210 


0.57221 


206 


29 


28 


260 


0.70910 


255 17 


17 


16 


211 


•57495 


206 59 


30 


29 


261 


.71184 


256 16 


iS 


17 


212 


•57769 


207 58 


31 


30 


262 


.71458 


257 15 


19 


18 


213 


.58042 


208 57 


Aug. I 


31 


263 


.71732 


258 14 


20 


19 1 


214 


.58316 


209 56 


2 


Aug. I 


264 


.72005 


259 13 


21 


20 


215 


0.58590 


210 55 


3 


2 


265 


0.72279 


260 12 


22 


21 


216 


.58864 


211 55 


4 


3 


266 


.72553 


261 II 


23 


22 


217 


•59138 


212 54 


5 


4 


267 


.72S27 


262 II 


24 


23 


218 


•594TI 


213 53 


6 


5 


268 


.73101 


263 10 


25 


24 


219 


.59685 


214 52 


7 


6 


269 


.73374 


264 9 


26 


25 


220 


0.59959 


215 51 


8 


7 


270 


0.73648 


265 8 


?7 


26 


221 


.60233 


216 50 


9 


8 


271 


.73922 


266 7 


?.8 


27 


222 


.60507 


217 49 


10 


9 


272 


.74196 


267 6 


29 


28 


223 


.60780 


218 49 


II 


10 


273 


.74470 


268 5 


30 


29 


224 


.61054 


219 48 


12 


II 


274 


.74743 


269 5 


Oct. I 


30 


225 


0.61328 


220 47 


13 


12 


275 


0.75017 


270 4 


2 


Oct. I 


226 


.61602 


221 46 


14 


13 


276 


.75291 


271 3 


3 


2 


227 


.61875 


222 45 


15 


14 


277 


.75565 


272 2 


4 


3 


228 


.62149 


223 44 


16 


15 


278 


.75838 


273 I 


5 


4 


229 


.62423 


224 43 


17 


16 


279 


.76112 


274 


6 


5 


230 


0.62697 


225 43 


18 


17 


280 


0.76386 


274 59 


7 


6 


231 


.62971 


226 42 


19 


18 


281 


.76660 


275 59 


8 


7 \ 


232 


.63244 


227 41 


20 


19 


282 


.76934 


276 58 


9 


8 


233 


.63518 


228 40 


21 


20 


283 


.77207 


277 57 


10 


9 


234 


.63792 


229 39 


22 


21 


284 


.77481 


278 56 


II 


10 


235 


0.64066 


230 38 


23 


22 


285 


0.77755 


279 55 


12 


II 


236 


.64339 


231 37 


24 


23 


286 


.78029 


280 54 


13 


12 


237 


.64613 


232 36 


25 


24 


287 


.78303 


281 53 


14 


'3| 


238 


.64S87 


233 36 


26 


25 


288 


.78576 


282 52 


15 


14 


239 


.65161 


234 35 


27 


26 


289 


.78850 


283 52 


16 


15 1 


240 


0.65435 


235 34 


28 


27 


290 


0.79124 


284 51 


17 


16 


241 


.65708 


236 33 


29 


28 


291 


.79398 


285 50 


18 


17 


242 


.65982 


237 32 


30 


29 


292 


.79671 


286 49 


19 


18; 


243 


.66256 


238 31 


31 


30 


293 


.79945 


287 48 


20 


19 


244 


.66530 


239 30 


Sept. I 


31 


294 


.S0219 


288 47 


21 


20 


245 


0.66804 


240 30 


2 


Sept. I 


295 


0.80493 


289 46 


22 


21 


246 


.67077 


241 29 


3 


2 


296 


.80767 


290 46 


23 


22 


247 


•67351 


242 28 


4 


3 


297 


.81040 


291 45 


24 


23 


24S 


.67625 


243 27 


5 


4 


298 


.81314 


292 44 


25 


24 


249 


.67899 


244 26 


6 


5 


299 


.81588 


293 43 


26 


25 


250 


0.68172 


245 25 


7 


6 


300 


0.81862 


294 42 


27 


26 



Smithsonian Tables 



54 



Table 21 



DAYS INTO DECIMALS OF A YEAR AND ANGLE. 









Day of 


Month. 




1 

1 


Day of Mon'ili. 


Day 
of 


Decimal 
of 


Angle. 






Day 
of 


Decimal 
of 


Angle. 












Year. 


a Year. 




Common 


Bissextile 


1 Year. 


a Year. 




Common 


Bissextile 1 








Year 


Year. 








Year. 




Year. 1 


301 


0.82136 


295''4i^ 


Oct. 28 


Oct. 27 


351 


0.95825 


344°58^ 


Dec. 17 


Dec. 16 


302 


.82409 


296 40 


29 


28 


352 


.96099 


345 57 


18 


17 


303 


.82683 


297 40 


30 


29 


353 


.96372 


346 56 


19 


18 


304 


•82957 


298 39 


31 


30 


354 


.96646 


347 56 


20 


19 


305 


0.83231 


299 38 


Nov. I 


31 


355 


0.96920 


348 55 


21 


20 


306 


•83504 


300 37 


2 


Nov. I 


356 


.97194 


349 54 


22 


21 


307 


•83778 


301 36 


3 


2 


357 


•97467 


350 53 


23 


22 


308 


•84052 


302 35 


4 


3 


358 


•97741 


351 52 


24 


23 


309 


.84326 


303 34 


5 


4 


359 


.98015 


352 51 


25 


24 


310 


0.84600 


304 34 


6 


5 


360 


0.98289 


353 50 


26 


25 


311 


.84873 


305 33 


7 


6 


361 


•98563 


354 50 


27 


26 


312 


•85147 


306 32 


8 


7 


362 


.98836 


355 49 


28 


27 


313 


.85421 


307 31 


9 


8 


I363 


.99110 


356 48 


29 


28 


314 


■85695 


308 30 


10 


9 


364 


•99384 


357 47 


30 


29 


315 


0.85969 


309 29 


II 


10 


365 


0.99658 


358 46 


31 


30 


316 


.S6242 


310 28 


12 


II 


1 366 


.99932 


359 45 




31 


317 
318 


.86516 
.86790 


311 27 

312 27 


13 

14 


12 

13 


1 








. 








319 
320 


.87064 

0.87337 


313 26 

314 25 


15 
16 


14 
15 


Conversion for Hours. 


Conversion for Minutes. 














321 
322 


.S7611 
.87885 
.88159 


315 24 

316 23 

317 22 


17 
18 

19 


16 

17 
18 


Hrs. 


Dec. of 
Year. 


Angle. 


Min. 


Dec. of 
Year. 


Ang'e. 


323 
















324 


■88433 


318 21 


20 


19 


1 


0. 0001 1 


2.^5 


1 


0.00000 


0.04 


325 


0.88706 


319 21 


21 


20 


2 


23 


4-9 


2 





.08 


326 


.88980 


320 20 


22 


21 


3 


34 


7^4 


3' 


I 


.12 


327 


.89254 


321 19 


23 


22 


4 


46 


9-9 


4 


I 


.16 


328 


.895 28 


322 18 


24 


23 














329 


.89802 


323 17 


25 


24 


5 

6 


0.00057 
68 


12.3 
14.8 


5 

6 


0.0000 I 

I 


0.21 
.25 


330 


0.90075 


324 16 


26 


25 


7 


80 


17.2 


7 


I 


.29 


331 


.90349 


325 15 


27 


26 


8 


91 


19.7 


8 


2 


•33 


332 


.90623 


326 15 


28 


27 


9 


103 


22.2 


9 


2 


•37 


333 


.90897 


327 14 


29 


28 














334 


.91170 


328 13 


30 


29 


10 


0.00114 


24.6 


10 


0.00002 


0.41 












II 


126 


27.1 


20 


4 


.82 


335 


0.91444 


329 12 


Dec. I 


30 


12 


137 


29.6 


30 


6 


1.23 


336 


.91718 


330 II 


2 


Dec. I 


13 


148 


32.0 


40 


8 


1.64 


337 


.91992 


331 10 


3 


2 


14 


160 


34-5 


50 


10 


2.05 


338 


.92266 


332 9 


4 


3 














339 


•92539 


333 9 


5 


4 


15 


0.00171 


37^o 


60 


O.OOOII 


2.46 


340 


0.92813 


334 8 


6 


5 


16 
17 


183 
194 


39-4 
41.9 










341 


.93087 


335 7 


7 


6 


18 


205 


44.4 




342 


.93361 


336 6 


8 


7 


19 


217 


46.8 




343 


•93634 


337 5 


9 


8 










344 


.93908 


338 4 


10 


9 


20 


0.00228 


49-3 




345 


0.94182 


339 3 


II 


10 


21 


240 


51^7 




346 
347 


.94456 
.94730 


340 2 

341 2 


12 
13 


II 
12 


22 
23 


251 
262 


54^2 
56.7 




348 


.95003 


342 I 


14 


13 


24 


274 


59-1 




349 
350 


.95277 
0.95551 


343 

343 59 


15 
16 


14 
15 













Smithsoman Tables 



55 



Table 22. 

HOURS, MINUTES AND SECONDS INTO DECIMALS OF A DAY. 



Hours 


Day. 


Min. 


Day. 


Min. 


Day. 


Sec. 


Day. 


Sec. 


Day. 


1 


0.041 667 


1 


0.000 694 


31 


0.021 528 


1 


0.000012 


31 


0.000 359 


2 


•083 333 


2 


.001 389 


32 


.022 222 


2 


.000023 


32 


.000370 


3 


.125 000 


3 


.002 083 


33 


.022 917 


3 


.000 035 


33 


,000382 


4 


.166667 


4 


.002 778 


34 


.023611 


4 


.000 046 


34 


.000394 


5 


0.208 333 


5 


0.003 472 


35 


0.024 305 


5 


0.000 058 


35 


0.000 405 


6 


.250 000 


6 


.004 167 


36 


.025 000 


6 


.000 069 


36 


.000417 


7 


.291 667 


7 


.004861 


37 


.025 694 


7 


.000 08 1 


37 


.000428 


8 


•333 333 


8 


•005 556 


38 


.026 389 


8 


.000 093 


38 


.000 440 


9 


•375 000 


9 


.006 250 


39 


.027 083 


9 


.000 104 


39 


.000 45 1 


10 


0.416 667 


to 


0.006 944 


40 


0.027 778 


10 


0.000 116 


40 


0.000 463 


II 


•458 333 


II 


•007 639 


41 


.028 472 


II 


.000 127 


41 


.000 475 


12 


.500000 


12 


•008 333 


42 


.029 167 


12 


.000 139 


42 


.000 486 


13 


.541 667 


13 


.009 028 


43 


.029861 


13 


.000 150 


43 


.000498 


14 


•583333 


14 


.009 722 


44 


•030 556 


14 


.000 162 


44 


.000509 


15 


0.625 000 


15 


0.010417 


45 


0.031 250 


15 


0.000 174 


45 


0.000521 


i6 


.666 667 


16 


.011 III 


46 


.031 944 


16 


.000 185 


46 


.000 532 


17 


•708 333 


17 


.011 806 


47 


•032 639 


17 


.000 197 


47 


.000544 


i8 


.750000 


18 


.012 500 


48 


•033 333 


18 


.000 208 


48 


•000 556 


19 


.791 667 


19 


•013 194 


49 


.034 028 


19 


.000 220 


49 


.000567 


20 


0^833 333 


20 


0.013 889 


50 


0.034 722 


20 


0.000 23 1 


50 


0.000579 


21 


.875 000 


21 


.014 583 


51 


•035 417 


21 


.000 243 


51 


.000590 


22 


.916667 


22 


.015 278 


52 


.036 1 1 1 


22 


•000255 


52 


.000 602 


23 


•958 333 


23 


.015 972 


53 


.036 806 


23 


.000 266 


53 


.0006x3 


24 


1.000 000 


24 


.016 667 


54 


•037 500 


24 


.000 278 


54 


.000 625 j 






25 


0.017 361 


55 


0.038 194 


25 


0.000 289 


55 


0.000 637 






26 


.018056 


56 


.038 889 


26 


.000 301 


56 


.000 648 




1 


27 


.018 750 


57 


•039 583 


27 


•000313 


57 


.000 660 






28 


.019444 


58 


.040 278 


28 


.000324 


58 


.000671 






29 


.020 139 


59 


.040 972 


29 


.000 336 


59 


.000 683 




' 


30 


0.020 833 


60 


0.041 667 


30 


0.000 347 


60 


.000 694 



Table 23. 

DECIMALS OF A DAY INTO HOURS, MINUTES AND SECONDS. 



Hundredths of 


a Day. 


Ten Thousandths 0I 


a Day. 


Millionths of 


1 Day. 


d. 


h. 


m. s. 


d. 


min 


. sec. 


d. 


sec. 


0.01 




14 24 


0.0001 




8.64 


0.000001 


0.09 


.02 




28 48 


2 




17.28 


2 


0.17 


•03 




43 12 


3 




25.92 


3 


0.26 


.04 




57 36 


4 




34^56 


4 


o^35 


0.05 


I 


12 


0.0005 




43.20 


0.000005 


0.43 


.06 


I 


26 24 


6 




51.84 


6 


0.52 


•07 


I 


40 48 


7 


I 


0.48 


7 


0.60 


.08 


I 


55 12 


8 


I 


9.12 


8 


0.69 


.09 


2 


9 36 


9 


I 


17.76 


9 


0.78 


0.10 


2 


24 


0.0010 


I 


26.40 


0.000010 


0.86 


.20 


4 


48 


20 


2 


5 2. So 


20 


1-73 


•30 


7 


12 


30 


4 


19.20 


30 


2.59 


.40 


9 


36 


40 


5 


45.60 


40 


3-46 


0.50 


12 





0.0050 


7 


12.00 


0.000050 


4-32 


.60 


14 


24 


60 


8 


38.40 


60 


5.18 


• 70 


16 


48 


70 


10 


4.80 


70 


6.05 


.80 


19 


12 


80 


II 


31.20 


So 


6.91 


1 .90 


21 


36 


90 


12 


57.60 


90 


7.78 



SMiTHSONffN Tables. 



.S6 



Table 24. 
MINUTES AND SECONDS INTO DECIMALS OF AN HOUR. 





Decimals of 


; 


Decimals of 




Decimals of 


Sec. 


Decimals of 




Min. 


an hour. 


Min. 


an hour. 


Sec. 


an hour. 


an hour. 




1 


0.016 667 


31 


0.516667 


1 


0.000 278 


31 


0.008611 




2 


•033 333 


32 


■533 333 


2 


.000 556 


32 


.008 889 




3 


.050 000 


33 


.550 000 \ 


3 


.000 833 


33 


.009 167 




4 


.066 667 


34 


.566 6G7 


4 


.001 III 


34 


.009 444 




5 


0.083 333 


35 


0.583 333 


5 


0.001 389 


35 


0.009 722 




6 


.100000 


36 


.600000 


6 


.001 667 


36 


.010000 




7 


.116667 


37 


.616667 


7 


.001 944 


37 


.010278 




8 


•133 333 


38 


•633 333 


8 


.002 222 


38 


.010556 




9 


.150000 


39 


.650000 


9 


.002 500 


39 


.010 833 




10 


0.166667 


40 


0.666 667 ! 


10 


0.002 778 


40 


O.OII III 




II 


•183 333 


41 


.683 333 


II 


.003 056 


41 


.011 389 




12 


.200000 


42 


.700000 


12 


■003 333 


42 


.011 667 




13 


.216667 


43 


.716667 


13 


.003611 


43 


.011944 




14 


•233 333 


44 


•733 333 


14 


.003 889 


44 


.012 222 




15 


0.250000 


45 


0.750 000 


15 


0.004 167 


45 


0.012 500 




16 


.266 667 


46 


.766 667 


16 


.004 444 


46 


.012 778 




17 


•283 333 


47 


•783 333 


17 


.004 722 


47 


.013056 




18 


."^oo 000 


48 


.800 000 


18 


.005 000 


48 


•013 333 




19 


.316 667 


49 


.816667 


19 


.005 278 


49 


.013 611 




20 


0-333 333 


50 


0.833 333 


20 


0.005 556 


50 


0.013 889 




21 


.^50000 


51 


.850000 


21 


.005 833 


51 


.014 167 




22 


.^66667 


52 


.866 667 


22 


.006 III 


52 


•014 444 




23 


•383 333 


53 


•883 333 


23 


.006 389 


53 


.014722 




24 


.400 000 


54 


.900000 


24 


.006 667 


54 


.015 000 




25 


0.416 667 


55 


0.916667 


25 


0.006 944 


55 


0.015 278 




26 


•433 333 


56 


•933 333 


26 


.007 222 


56 


.015 556 




27 


.450 000 


57 


.950 000 


27 


.007500 


57 


•015 833 




28 


.466 667 


58 


.966 667 


28 


.007 778 


58 


.016 III 




29 


•483 333 


59 


•983 333 


29 


.008 056 


59 


.016 389 




30 


0.500 000 


60 


1. 000 000 


30 


0.008 333 


60 


0.016 667 





Table 25. 



LOCAL MEAN TIME AT APPARENT NOON. 



















Day of 
Month. 


JAN. 


FEB. 


MAR. 


A-PR. 


MAY. 


JUNE. 




I 

8 

16 

24 

I 

8 

16 

24 


h. ni. 
12 4 
12 7 
12 10 
12 12 


h. m. 
12 14 
12 14 
12 14 
12 13 


h. m. 
12 12 
12 II 
12 9 
12 6 


h. ra. 
12 4 
12 2 
12 
II 58 


h. m. 

II 57 
II 56 
II 56 
II 57 


h. m. 
II 58 

11 59 

12 
12 2 




JULY. 


AUG. 


SEPT. 


OCT. 


NOV. 


D.iC. 




h. m. 
12 4 

12 5 
12 6 
12 6 


h. »n. 
12 6 
12 5 
12 4 
12 2 


h. m. 
12 
II 58 
II 55 
II 52 


h. ta. 

II 50 
II 48 
II 46 
II 44 


h. m. 
II 44 
II 44 
II 45 
II 47 


h. m. 

II 49 
II 52 

11 56 

12 





Smithsonian Tables. 



.=;7 



Table 26. 

SIDEREAL TIME INTO MEAN 
SOLAR TIME. 

The tabular values are to be subtracted 
from a sidereal time interval. 



Table 27. 

MEAN SOLAR TIME INTO 
SIDEREAL TIME. 

The tabular values are to be added to a 
mean solar time interval. 





Reducti in 




Reduc- 




Reduc> 






Reduction to 




Reduc- 




Reduc- 


Hrs. 


to 
IVIean Time. 


Min. 


tion 

to Mean 

Time. 


Min. 


tion 

to wean 

Time. 




Hrs. 


Sidereal 
Time. 


Min. 


tion to 

Sidereal 

Time. 


Min. 


ton to 

Sidereal 

Time. 


h. 


m. s. 


m. 


s. 


m. 


s. 


h. 


lU. s. 


Ul. 


s. 


m. 


s. 


1 


9.83 


1 


0. t6 


31 


5.08 




1 


9.86 


1 


0.16 


31 


5-09 


2 


19.66 


2 


0.33 


32 


5-24 




2 


19.71 


2 


0-33 


32 


5-26 


3 


29.49 


3 


0.49 


33 


5-41 




3 


29.57 


3 


0.49 


33 


5-42 


4 


39.32 


4 


0.66 


34 


5-57 




4 


39-43 


4 


0.66 


34 


5-59 


5 


49-15 


5 


0.S2 


35 


5-73 




5 


49.28 


5 


0.82 


35 


5-75 


6 


58.98 


6 


0.9S 


36 


5-90 




6 


59-14 


6 


0.99 


36 


5-91 


7 


I 8.81 


7 


I-I5 


37 


6.06 




7 


I 9.00 


7 


I-I5 


37 


6.08 


8 


I 18.64 


8 


I-31 


38 


6.23 




8 


I 18.85 


8 


I-31 


38 


6.24 


9 


I 28.47 


9 


1.47 


39 


6-39 




9 


I 28.71 


9 


1.48 


39 


6.41 


10 


I 38-30 


10 


1.64 


40 


6.55 




10 


I 38-56 


10 


1.64 


40 


6.57 


II 


I 48.13 


II 


1.80 


41 


6.72 




II 


I 48.42 


II 


1. 81 


41 


6-74 


12 


I 57-95 


12 


1.97 


42 


6.88 




12 


I 58.28 


12 


1.97 


42 


6.90 


13 


2 7-78 


13 


2.13 


43 


7.04 




13 


2 8.13 


13 


2.14 


43 


7.06 


14 


2 17.61 


14 


2.29 


44 


7.21 




14 


2 17.99 


14 


2.30 


44 


7.23 


15 


2 27.44 


15 


2.46 


45 


7-37 




15 


2 27.85 


15 


2.46 


45 


7-39 


i6 


2 37.27 


16 


2.62 


46 


7-54 




16 


2 37-70 


16 


2.63 


46 


7-56 


17 


2 47.10 


17 


2.79 


47 


7.70 




17 


2 47-56 


17 


2.79 


47 


7.72 


i8 


2 56.93 


18 


2.95 


48 


7.86 




18 


2 57-42 


18 


2.96 


48 


7.89 


19 


3 6.76 


19 


3-II 


49 


8.03 




19 


3 7-27 


19 


3.12 


49 


8.05 


20 


3 16.59 


20 


3-28 


50 


8.19 




20 


3 17-13 


20 


3-29 


50 


8.21 


21 


3 26.42 


21 


3-44 


51 


8.36 




21 


3 26.99 


21 


3-45 


51 


8.38 


22 


3 36.25 


22 


3.60 


52 


8.52 




22 


3 36-84 


22 


.3-61 


52 


8.54 


23 


3 46.08 


23 


3-77 


53 


8.68 




23 


3 46.70 


23 


3-78 


53 


8.71 


24 


3 55-91 


24 


3-93 


54 


8.85 




24 


3 56.56 


24 


3-94 


54 


8.87 






25 


4.10 


55 


9.01 








25 


4. 1 1 


55 


9.04 






26 


4.26 


56 


9.17 








26 


4-27 


56 


9.20 






27 


4.42 


57 


9-34 








27 


4-44 


57 


9-36 






28 


4-59 


58 


9-50 








28 


4.60 


58 


9-53 






29 


4-75 


59 


9.67 








29 


4-76 


59 


9.69 






30 


4.91 


60 


9-83 








30 


4-93 


60 


9.86 




Reduction for 


Seconds— sidereal or mean 


solar. 




The tabula 


r values are to 


be / ^t^btracted from a sider 
\ added to a mean solar 


^^ V time interv 


al. 


Sidereal 






















or 





1 


2 


3 


4 


5 • 


6 


7 


8 


9 


Mean Time. 






















s. 


s. 


s. 


s. 


s. 


s. 


s. 


s. 


s. 


s. 


s. 





0.00 


0.00 


0.0 1 


0.0 1 


0.0 1 


0.0 1 


0.02 


0.02 


0.02 


0.02 


lO 


•03 


•03 


•03 


.04 


.04 


.04 


.04 


.05 


-05 


.05 


20 


-05 


.06 


.06 


.06 


.07 


.07 


.07 


.07 


.08 


.08 


30 


.08 


.08 


.09 


.09 


.09 


.10 


.10 


.10 


.10 


.11 


40 


.11 


.11 


.11 


.12 


.12 


.12 


•13 


•13 


•13 


.13 


50 


0.14 


0.14 


0.14 


0.15 


0.15 


0.15 


0.15 


0.16 


0.16 


0.16 



Smithsonian Tables. 



* Subtract 0.14 from a sidereal time interval. 
58 



CONVERSION OF MEASURES OF WEIGHT. 



Conversion of avoirdupois pounds and ounces into kilograms . Table 28 

Conversion of kilograms into avoirdupois pounds and ounces . Table 29 

Conversion of grains into grams Table 30 

Conversion of grams into grains Table 31 



Table 28. 

AVOIRDUPOIS POUNDS AND OUNCES INTO KILOGRAMS. 

I avoirdupois pound = 0.4535924 kilogram. 
I avoirdupois ounce = 0.0283495 kilogram. 



Pounds. 


,0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 





0.0000 


0.0454 


0.0907 


O.1361 


O.1814 


0. 2268 


0.2722 


0.3175 


0.3629 


0.4082 


I 


0.4536 


0.4990 


0.5443 


0.5897 


0.6350 


0.6804 


0.7257 


O.7711 


0.8165 


0.8618 


2 


0.9072 


0.9525 


0.9979 


1 .0433 


1.0886 


I. 1340 


I.I793 


1.2247 


1. 2701 


1.3154 


3 


1.3608 


1. 4061 


1. 45 15 


1.4969 


1.5422 


1.5876 


1.6329 


1.6783 


1.7237 


1.7690 


4 


1. 8144 


1.8597 


1.9051 


1.9504 


1-9958 


2.0412 


2.0S65 


2.1319 


2.1772 


2.2226 


5 


2.2680 


2.3133 


2.3587 


2.4040 


2.4494 


2.4948 


2.5401 


2.5S55 


2.6308 


2.6762 


6 


2.7216 


2.7669 


2.8123 


2.8576 


2.9030 


2.9484 


2.9937 


3.0391 


3.0844 


3.1298 


7 


3-1751 


3.2205 


3-2659 


3.3112 


3-3566 


3.4019 


3.4473 


3.4927 


3.5380 


3^5834 


8 


3.6287 


3-6741 


3-7195 


3-7648 


3.8102 


3-8555 


3-9009 


3^9463 


3.9916 


4.0370 


9 


4.0823 


4.1277 


4-1731 


4.2184 


4.2638 


4-3091 


4-3545 


4-3998 


4-4452 


4.4906 


Ounces. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 


kg. 





0.0000 


0.0028 


0.0057 


0.0085 


O.OII3 


0.0142 


0.0170 


0.0198 


0.0227 


0.0255 


I 


.0283 


.0312 


.0340 


.0369 


.0397 


.0425 


.0454 


.0482 


.0510 


•0539 


2 


.0567 


.0595 


.0624 


• 0652 


.0680 


.0709 


.0737 


.0765 


-0794 


.0822 


3 


.0850 


•0S79 


.0907 


.0936 


.0964 


.0992 


.1021 


.1049 


.1077 


.1106 


4 


.1134 


.1162 


.1191 


.1219 


.1247 


.1276 


.1304 


•1332 


.1361 


.1389 


5 


O.1417 


0.1446 


0.1474 


o^i503 


O.1531 


0.1559 


0.1588 


O.1616 


0.1644 


0.1673 


6 


.1701 


.1729 


.1758 


.1786 


.1814 


.1843 


.1871 


.1899 


.1928 


•1956 


7 


.1984 


.2013 


.2041 


.2070 


.2098 


.2126 


.2155 


• 2183 


.2211 


.2240 


8 


.2268 


.2296 


•2325 


•2353 


.2381 


.2410 


.2438 


.2466 


.2495 


.2523 


9 


•2551 


.2580 


.2608 


.2637 


.2665 


.2693 


.2722 


•2750 


.2778 


.2807 


10 


0.2835 


0.2863 


0.2892 


0.2920 


0. 2948 


0.2977 


0.3005 


0.3033 


0.3062 


0.3090 


II 


.3118 


•3147 


•3175 


• 3203 


•3232 


.3260 


.3289 


•3317 


•3345 


•3374 


12 


.3402 


.3430 


•3459 


•34S7 


•3515 


• 3544 


•3572 


.3600 


.3629 


•3657 


13 


.3685 


•3714 


-3742 


•3770 


•3799 


.3827 


•3856 


.3884 


.3912 


• ,',941 


14 


•3969 


•3997 


.4026 


• 4054 


.4082 


.4111 


•4139 


.4167 


.4196 


.4224 ' 


15 


.4252 


.4281 


•4309 


•4337 


.4366 


•4394 


•4423 


-4451 


•4479 


.4508 



Smithsonian Tables. 



60 



Table 29. 
KILOGRAMS INTO AVOIRDUPOIS POUNDS AND OUNCES. 
I kilogram = 2.204622 avoirdupois pounds. 



Kilograms. 


0.0 


0.1 


0.2 


0.3 


0.4 


0.5 


0.6 


0.7 


0.8 


0.9 




Av. lbs. 


Av. lbs. 


Av. lbs. 


Av. lbs. 


Av. lbs. 


Av. lbs. 


Av.lbs. 


Av. lbs. 


Av. lbs. 


1 

Av. lbs. 





0.000 


0.220 


0.441 


0.661 


0.882 


1. 102 


1-323 


1-543 


1.764 


1.984 


I 


2.205 


2.425 


2.646 


2.866 


3.0S6 


3-307 


3-527 


3-748 


3.968 


4.189 1 


2 


4.409 


4.630 


4.850 


5-071 


5-291 


5-512 


5-732 


5-952 


6.173 


6-393 


3 


6.614 


6.834 


7-055 


7-275 


7.496 


7-716 


7-937 


8-157 


8.378 


8.598 


4 


S.818 


9-039 


9-259 


9.480 


9.700 


9.921 


10. 141 


10.362 


10.582 


10.803 


5 


11.023 


11.244 


11.464 


11.684 


11.905 


12.125 


12.346 


12.566 


12.7S7 


13.007 


6 


13.22S 


13.448 


13.669 


13.889 


14. 1 10 


14-330 


14-551 


14.771 


14.991 


15.212 


7 


15-432 


15-653 


15-873 


16.094 


16.314 


16.535 


16.755 


16.976 


17.196 


17.417 


8 


17-637 


17-857 


18.078 


18.298 


18.519 


18.739 


18.960 


19.180 


19.401 


19.621 


9 


19.842 


20.062 


20.283 


20.503 


20.723 


20.944 


21.164 


21.385 


21.605 


21.826 




Tenths of a Kilogram into Ounces. 


Hundredths of a Kilogram 
into Decimals of a Pound and Ounces. 


kg- 


Oz. 


kg. 


Oz. 


kg. ; 


\.v. lbs. Oz. 


kg. 


Av. lbs. Oz. 




O.I 


3-5274 


0.6 


21.1644 


O.OI 


0.022 = 0.35 


0.06 


0.132 = 2.12 




.2 


7.0548 


•7 


24.6918 


.02 


.044 = 0.71 


.07 


.154 = 2.47 




.3 


10.5822 


.8 


28.2192 


-03 


.066 = 1.06 


.08 


.176 = 2.82 




-4 


14.1096 


-9 


31.7466 


.04 


.088 = 1. 41 


.09 


.198 = 3-17 




-5 


17-6370 


I.O 


35-2740 


-05 


.110 = 1.76 


.10 


.220 = 3.53 



GRAINS INTO GRAMS. 

I grain = 0.06479892 gram. 



Table 30. 



Grains. 





1 2 


3 


4 


5 


6 


7 


8 


9 




grams. 


grams. grams. 


grams. 


grams. 


grams. 


grams. 


grams. grams. 


grams. 





0.0000 


0.0648 0.1296 


0.1944 


0.2592 


0.3240 


0.3888 


0.4536 


0.5184 


0.5832 


10 


0.6480 


0.7128 


0.7776 


0.8424 


0.9072 


0.9720 


1.0368 


I.IO16 


1. 1664 


1. 2312 


20 


1.2960 


1.3608 


1.4256 


1.4904 


1-5552 


1.6200 


r.6848 


1.7496 


1.8144 


1.8792 


30 


1.9440 


2.0088 


2.0736 


2.1384 


2.2032 


2.2680 


2.3328 


2.3976 


2.4624 


2.5272 


40 


2.5920 


2.6568 


2.7216 


2. 7864 


2.8512 


2.9160 


2.9S08 


3-0455 


3- 1 103 


3.175I 


50 


3-2399 


3-3047 


3-3695 


3-4343 


3-4991 


3-5639 


3.62S7 


3-6935 


3-7583 


3-8231 


60 


3-8879 


3-9527 


4-0175 


4.0823 


4.1471 


4.2119 


4-2767 


4-3415 


4-4063 


4.4711 


70 


4-5359 


4.6007 


4-6655 


4-7303 


4-7951 


4-8599 


4-9247 


4-9895 


5-0543 


5-119^ 


80 


5-1S39 


5-2487 


5-3135 


5-3783 


5-4431 


5-5079 


5-5727 


5-6375 


5-7023 


5-7671 


90 


5-8319 


5-8967 


5-9615 


6.0263 


6.091 1 


6.1559 


6.2207 


6.2855 


6.3503 


6.4151 




Tenths of a G 


rain. 


Hundredths of a Grain. 


Grain. 


gram. 


Gr; 


lin. 


gram. 


Grain; | gram. 


Grain. 


gram. 




O.I 


0.0065 


0. 


6 


0.03S9 


O.OI 


0.0006 


0.06 


0.0039 




.2 


.0130 




7 


-0454 


.02 


.0013 


.07 


.0045 




.3 


.0194 




8 


.05 IS 


.03 


.0019 


.08 


.0052 




.4 


.0259 




9 


.0583 


.04 


.0026 


.09 


.0058 




•5 


.0324 


I. 





.0648 


-05 


.0032 


.10 


.0065 



Smithsonian Tables. 



61 



Table 31 . 



CRAMS INTO GRAINS. 

I gram= 15-432356 grains. 



Grams. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Graias. 





0.00 


1.54 


3-09 


4-63 


6.17 


7.72 


9.26 


10.80 


12.35 


13.89 


I 


15-43 


16.98 


18.52 


20.06 


21.61 


23.15 


24.69 


26.24 


27.78 


29.32 


2 


30.86 


32-41 


33-95 


35-49 


37.04 


38.58 


40.12 


41.67 


43.21 


44.75 


3 


46.30 


47-84 


49- 38 


50.93 


52.47 


54.01 


55-56 


57.10 


58.64 


60.19 


4 


61.73 


63.27 


64.82 


66.36 


67.90 


69.45 


70.99 


72.53 


74.08 


75.62 


5 


77.16 


78.71 


80.25 


81.79 


83.33 


84.88 


86.42 


87.96 


89.51 


91-05 


6 


92.59 


94.14 


95.68 


97.22 


98.77 


100.31 


101.85 


103.40 


104.94 


106.48 


7 


108.03 


109.57 


III. II 


112.66 


114.20 


115.74 


117.29 


118.83 


120.37 


121.92 , 


8 


123.46 


125.00 


126.55 


128.09 


129.63 


131. 18 


132.72 


134.26 


135.80 


137.35 


9 


138.89 


140.43 


141.98 


143.52 


145.06 


146.61 


148.15 


149.69 


151.24 


152.78 





1 


2 


3 


4 


5 


6 


7 


8 


9 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 


Grains. 





0.00 


15-43 


30.86 


46.30 


61.73 


77.16 


92.59 


108.03 


123.46 


138.89 


lO 


154-32 


169.76 


185.19 


200.62 


216.05 


231-49 


246.92 


262.35 


277.78 


293.21 


20 


308.65 


324.08 


339-51 


354-94 


370.38 


385-81 


401.24 


416.67 


432.11 


447-54 


30 


462.97 


478.40 


493-84 


509-27 


524.70 


540.13 


555.56 


571.00 


586.43 


601.86 


40 


617.29 


632-73 


648.16 


663.59 


679.02 


694.46 


709.89 


725.32 


740.75 


756.19 


50 


771.62 


787-05 


802.48 


817.91 


833.35 


848.78 


864.21 


879.64 


895.08 


910.51 


60 


925-94 


941-37 


956.81 


972.24 


987.67 


1003.10 


1018.54 


1033.97 


1049.40 


1064.83 


70 


1080.26 


1095.70 


nil. 13 


1126.56 


1 141.99 


1157.43 


1172.86 


1188.29 


1203.72 


1219.16 


80 


1234-59 


1250.02 


1265.45 


1280.89 


1296.32 


131I-75 


1327.18 


1342.61 


1358.05 


1373-48 


90 


1388.91 


1404.34 


1419.78 


1435.21 


1450.64 


1466.07 


1481.51 


1496.94 


1512.37 


1527.80 




gram. 


Grain. 


gram. 


Grain. 


gram. 


Grain. 


gram. 


Grain. 




O.OI 


0.154 


0.06 


0.926 


O.OOI 


0.015 


0.006 


0.093 




.02 


•309 


.07 


1.080 


.003 


.031 


.007 


.108 




.03 


•463 


.oS 


1-235 


.003 


.046 


.008 


.123 




.04 


.617 


.09 


1.389 


.004 


.062 


.009 


.139 




-05 


.772 


.10 


1.543 


.005 


.077 


.010 


.154 



62 



WIND TABLES. 



Synoptic conversion of velocities Table 32 

Miles per hour into feet per second Table 33 

Feet per second into miles per hour Table 34 

Meters per second into miles per hour Table 35 

Miles per hour into meters per second Table 36 

Meters per second into kilometers per hour Table 37 

Kilometers per hour into meters per second Table 38 

Scale of velocity equivalents of the so-called Beaufort scale of 

wind Table 39 

Radius of critical curvature and velocities of gradient winds for 
frictionless motion in Highs and Lows. 

English measures Table 40 

Metric measures Table 41 



Table 32. 



SYNOPTIC CONVERSION OF VELOCITIES. 

Miles per hour into meters per second, feet per second 
and kilometers per hour. 



Miles 


Meters 


Feet 


Kilome- 


Miles 


Meters 


Feet 


Kilome- 


Miles 


Meters 


Feet 


Kilome- 


per 


per 


per 


ters per 


per 


per 


per 


ters per 


per 


per 


per 


ters per 


hour. 


second. 


second. 


hour. 


hour. 


second. 


second. 


hour. 


hour. 


second. 


second. 


hour. 


0.0 


0.0 


0.0 


0.0 


26.0 


11.6 


38.1 


41.8 


52.0 


23.2 


76.3 


837 


0.5 


0.2 


0.7 


0.8 


26.5 


1 1.8 


38.9 


42.6 


52.5 


23-5 


77.0 


84.5 


I.O 


0.4 


1-5 


1.6 


27.0 


12.1 


39-6 


43-5 


53-0 


237 


777 


85-3 


1-5 


0.7 


2.2 


2.4 


27-5 


12.3 


40.3 


44-3 


53-5 


23-9 


78.5 


86.1 


2.0 


0.9 


2.9 


3-2 


28.0 


12.5 


41.1 


45-1 


54-0 


24.1 


79.2 


S6.9 


2.5 


I.I 


3-7 


4.0 


28.5 


12.7 


41.8 


45-9 


54-5 


24.4 


79-9 


87.7 


3.0 


1-3 


4.4 


4.8 


29.0 


13.0 


42.5 


46.7 


55.0 


24.6 


80.7 


88.5 


3-5 


1.6 


5-1 


5-6 


29-5 


13.2 


43-3 


47-5 


55-5 


24.8 


81.4 


89-3 


4.0 


1.8 


5-9 


6.4 


30.0 


134 


44.0 


48.3 


56.0 


25.0 


82.1 


90.1 


4-5 


2.0 


6.6 


7.2 


30.5 


13-6 


447 


49.1 


56.5 


25-3 


82.9 


90.9 


5-0 


2.2 


7-3 


8.0 


31.0 


13-9 


45-5 


49-9 


57-0 


25-5 


83.6 


91.7 


5-5 


2.5 


8.1 


8.9 


31-5 


14.1 


46.2 


507 


57-5 


257 


84.3 


92.5 


6.0 


2.7 


8.8 


9-7 


32.0 


14-3 


46.9 


51-5 


58.0 


25-9 


85.1 


93-3 


6.5 


2.9 


9-5 


10.5 


32.5 


14-5 


477 


52.3 


58.5 


26.2 


85.8 


94.1 


7.0 


3-1 


10.3 


1 1-3 


33-0 


14.8 


48.4 


53-1 


59-0 


26.4 


86.5 


95-0 


7-5 


3-4 


II.O 


12. 1 


33-5 


15-0 


49.1 


53-9 


59-5 


26.6 


87.3 


95-8 


8.0 


3-6 


11.7 


12.9 


34-0 


15-2 


49-9 


547 


60.0 


26.8 


88.0 


96.6 


«-5 


3-8 


12.5 


137 


34-5 


154 


50.6 


55-5 


60.5 


27.0 


88.7 


974 


9.0 


4.0 


13.2 


14-5 


35.0 


15.6 


51-3 


56.3 


61.0 


27-3 


89.5 


9S.2 


9-5 


4.2 


13-9 


15-3 


35-5 


15-9 


52.1 


57-1 


61.5 


27-5 


90.2 


99.0 


lO.O 


4-5 


14.7 


16.1 


36.0 


16.1 


52.8 


57-9 


62.0 


27.7 


90.9 


99.8 


10.5 


4-7 


154 


16.9 


36.5 


16.3 


53-5 


58.7 


62.5 


27.9 


91.7 


100.6 


II.O 


4-9 


16.1 


177 


37.0 


16.5 


54-3 


59-5 


63.0 


28.2 


92.4 


101.4 


II-5 


5-1 


16.9 


18.5 


37-5 


16.8 


55-0 


60.4 


63-5 


28.4 


93-1 


102.2 


12.0 


5-4 


17.6 


19-3 


38.0 


17.0 


557 


61.2 


64.0 


28.6 


93-9 


103.0 


12.5 


5-6 


18.3 


20.1 


38.5 


17.2 


56.5 


62.0 


64-5 


28.8 


94.6 


103.8 


13.0 


5-8 


19.1 


20.9 


39-0 


17.4 


57-2 


62.8 


65.0 


29.1 


95-3 


104.6 


13-5 


6.0 


19.8 


21.7 


39-5 


17.7 


57-9 


63.6 


65-5 


29-3 


96.1 


105.4 


14.0 


6.3 


20.5 


22.5 


40.0 


17.9 


5S.7 


64.4 


66.0 


29-5 


96.8 


106.2 


14-5 


6.5 


21.3 


23-3 


40.5 


18.1 


594 


65.2 


66.5 


29.7 


97-5 


107.0 


15.0 


6.7 


22.0 


24.1 


41.0 


18.3 


60.1 


66.0 


67.0 


30.0 


98.3 


107.8 


15-5 


6.9 


22.7 


24.9 


41-5 


18.6 


60.9 


66.8 


67-5 


30.2 


99.0 


108.6 


16.0 


7.2 


23-5 


257 


42.0 


18.8 


61.6 


67.6 


68.0 


304 


997 


109.4 


16.5 


7-4 


24.2 


26.6 


42.5 


19.0 


62,3 


68.4 


68.5 


30.6 


100.5 


1 10.2 


17.0 


7.6 


24.9 


27.4 


43-0 


19.2 


63.1 


69.2 


69.0 


30.S 


101.2 


1 1 1.0 


17-5 


7.8 


257 


28.2 


43-5 


19.4 


63.8 


70.0 


69-5 


3I-I 


101.9 


111.8 


18.0 


8.0 


26.4 


29.0 


44.0 


19.7 


64-5 


70.8 


70.0 


31-3 


102.7 


1 12.7 


18.5 


8.3 


27.1 


29.8 


44-5 


19.9 


65-3 


71.6 


70.5 


31-5 


103.4 


1 13-5 


19.0 


8.5 


27.9 


30.6 


45-0 


20.1 


66.0 


72.4 


71.0 


317 


104. 1 


1 14-3 


19-5 


8.7 


2S.6 


314 


45-5 


20.3 


66.7 


73-2 


71-5 


32.0 


104.9 


115.1 


20.0 


8.9 


29-3 


32.2 


46.0 


20.6 


67.5 


74.0 


72.0 


32.2 


105.6 


1 15.9 


20.5 


9.2 


30.1 


33-0 


46.5 


20.S 


68.2 


74-8 


72.5 


324 


106.3 


116.7 


21.0 


9-4 


30.8 


33.8 


47.0 


21.0 


68.9 


75.6 


73.0 


32.6 


107. 1 


1 1 7.5 


21.5 


9.6 


31-5 


34.6 


47-5 


21.2 


69.7 


76.4 


73-5 


32.9 


107.8 


1 1 8.3 


22.0 


9.8 


32.3 


354 


48.0 


21.5 


70.4 


77.2 


74.0 


33-1 


108.5 


119.1 


22.5 


10. 1 


33-0 


36.2 


48.5 


21.7 


71. 1 


78.1 


74.5 


33-3 


109.3 


II 9.9 


23.0 


10.3 


33-7 


37-0 


49.0 


21.9 


71.9 


78.9 


75-0 


33-5 


IIO.O 


120.7 


23-5 


10.5 


34-5 


37.8 


49-5 


22.1 


72.6 


797 


75-5 


33-8 


1 10.7 


121.5 


24.0 


10.7 


35-2 


38.6 


50.0 


22.4 


73-3 


80.5 


76.0 


34-0 


II 1.5 


122.3 


24-5 


II.O 


35-9 


394 


50.5 


22.6 


74.1 


81.3 


76.5 


34-2 


112.2 


123.1 


25.0 


11.2 


36.7 


40.2 


51.0 


22.8 


74.8 


82.1 


77.0 


344 


112.9 


123.9 


25-5 


11.4 


37-4 


41.0 


5T.5 


23.0 


75-5 


82.9 


77-5 


34-6 


1 137 


124.7 


26.0 


11.6 


38.1 


41.8 


52.0 


23.2 


76.3 


837 


78.0 


34-9 


1 14.4 


125.5 



Smithsonian Tables. 



64 



Table 33. 



MILES PER HOUR INTO FEET PER SECOND. 

I mile per hour = — feet per second. 
30 



Miles 
per hour. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




Feet per 


Feet per 


Feet pei 


Feet per 


Feet per 


Feet per 


Feet per 


Feet per 


Feet per 


Feet per 




sec. 


sec. 


sec. 


sec. 


sec 


sec. 


sec. 


sec. 


sec. 


sec. 





0.0 


1-5 


2-9 


4-4 


5-9 


7-3 


8.8 


10,3 


II.7 


13.2 


10 


14.7 


16. 1 


17.6 


19. 1 


20.5 


22.0 


23-5 


24.9 


26.4 


27.9 


20 


29-3 


30.8 


32.3 


33-7 


35-2 


36.7 


38-1 


39-6 


41. 1 


42.5 


30 


44.0 


45-5 


46.9 


48.4 


49-9 


51.3 


52.8 


54-3 


55-7 


57-2 


40 


58.7 


60.1 


61.6 


63-1 


64-5 


66.0 


67-5 


68.9 


70.4 


71.9 


50 


73-3 


74.8 


76.3 


77-7 


79-2 


So. 7 


82.1 


83.6 


85.1 


86.5 


60 


88.0 


89-5 


90.9 


92.4 


93-9 


95-3 


96.8 


98.3 


99-7 


101.2 


70 


102.7 


104. 1 


105.6 


107. 1 


108.5 


IIO.O 


111.5 


112. 9 


114.4 


115-9 


80 


117.3 


118.8 


120.3 


121. 7 


123.2 


124.7 


126.I 


127.6 


129.1 


130.5 


90 


132.0 


133-5 


134-9 


136.4 


137-9 


139-3 


140.8 


142.3 


143-7 


145-2 


100 


146.7 


148. 1 


149.6 


151. 1 


152.5 


154.0 


155-5 


156.9 


158.4 


159-9 


no 


161. 3 


162.S 


164.3 


1^5-7 


167.2 


168.7 


170. 1 


171. 6 


173- 1 


174-5 


120 


176.0 


177-5 


178.9 


180.4 


181. 9 


183.3 


184.8 


186.3 


187.7 


189.2 


130 


190.7 


192. 1 


193-6 


195- 1 


196-5 


198.0 


199-5 


200.9 


202.4 


203.9 


140 


205.3 


206.8 


208.3 


209.7 


211. 2 


212.7 


214. 1 


215-6 


217. 1 


218.5 

























Table 34. 



FEET PER SECOND INTO MILES PER HOUR. 







I 


foot per second = — 
44 


miles per hour 








Feel 
per sec. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 




per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 





0.0 


0.7 


1-4 


2.0 


2-7 


3-4 


4.1 


4.8 


5-5 


6.1 


10 


6.8 


7-5 


8.2 


8.9 


9-5 


10.2 


10.9 


II. 6 


12.3 


13.0 


20 


13-6 


14-3 


15.0 


15-7 


16.4 


17.0 


17-7 


18.4 


19. 1 


19.8 


30 


20.5 


21. 1 


21.8 


22.5 


23.2 


23-9 


24-5 


25.2 


25-9 


26.6 


40 


27-3 


28.0 


28.6 


29-3 


30.0 


30.7 


31-4 


32.0 


32-7 


33-4 


50 


34-1 


34-8 


35-5 


36.1 


36.8 


37-5 


38.2 


38-9 


39-5 


40 2 


60 


40.9 


41.6 


42-3 


43-0 


43-6 . 


44-3 


45-0 


45-7 


46-4 


47.0 


70 


47-7 


48.4 


49.1 


49-8 


50-5 


51-I 


51-8 


52.5 


53-2 


53-9 


80 


54-5 


55-2 


55-9 


56-6 


57-3 


58.0 


58.6 


59-3 


60.0 


60.7 


90 


61.4 


62.0 


62.7 


63-4 


64.1 


64.8 


65-5 


66.1 


66.8 


67-5 


100 


68.2 


68.9 


69-5 


70.2 


70.9 


71.6 


72.3 


73-0 


73-6 


74-3 


no 


75-0 


75-7 


76.4 


77.0 


77-7 


78.4 


79-1 


79-8 


80.5 


81. 1 


120 


81.8 


82.5 


83-2 


83-9 


84-5 


85-2 


85-9 


86.6 


87.3 


88.0 


130 


88.6 


89.3 


90.0 


90.7 


91.4 


92.0 


92.7 


93-4 


94.1 


94.8 


140 


95-5 


96.1 


96.8 


97-5 


98.2 


98.9 


99-5 


100.2 


100.9 


101.6 


150 


102.3 


103.0 


103.6 


104.3 


105.0 


105.7 


106.4 


107.0 


107.7 


108.4 


160 


109. 1 


iog.8 


1 10.5 


III. I 


III. 8 


112. 5 


113.2 


113-9 


1 14- 5 


115-2 


170 


115-9 


116.6 


II7-3 


118.0 


118.6 


II9-3 


120.0 


120.7 


121.4 


120.0 


180 


122.7 


123.4 


124. 1 


124.8 


125.5 


1 26. 1 


126.8 


127.5 


128.2 


128.9 


190 


129-5 


130.2 


130.9 


131-6 


132-3 


133-0 


133-6 


134-3 


135-0 


135.7 



Bmithsonian Tables. 



65 



Table 35. 



METERS PER SECOND INTO MILES PER HOUR. 

I meter per second = 2.236932 miles per hour. 



Meters per 
second. 


0.0 


0.1 


0.2 


0.3 


0.4 


0.5 


0.6 


0.7 


0.8 


0.9 






Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 


Miles 






per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 







0.0 


0.2 


0.4 


0.7 


0.9 


I.I 


1-3 


1.6 


1.8 


2.0 




I 


2.2 


2.5 


2.7 


2.9 


3-1 


3-4 


3-6 


3-8 


4.0 


4-3 




2 


4-5 


4-7 


4-9 


5-1 


5-4 


5-6 


5.8 


6.0 


6.3 


6.5 




3 


6.7 


6.9 


7.2 


7-4 


7.6 


7.8 


8.1 


8.3 


8.5 


8.7 




4 


8.9 


9.2 


9-4 


9.6 


9.8 


10. 1 


10.3 


10.5 


10.7 


II. 




5 


11.2 


11.4 


II. 6 


II. 9 


12. 1 


12.3 


12.5 


12.8 


13.0 


13.2 




6 


13-4 


13.6 


13-9 


14. 1 


14-3 


14.5 


14.8 


150 


15-2 


15-4 




7 


15-7 


15-9 


16. 1 


16.3 


16.6 


16.8 


17.0 


17.2 


17.4 


17.7 




8 


17.9 


18. 1 


18.3 


18.6 


18.8 


19.0 


19.2 


19-5 


19.7 


19.9 




9 


20.1 


20.4 


20.6 


20.8 


21.0 


21.3 


21.5 


21.7 


21.9 


22.1 




10 


22.4 


22.6 


22.8 


23.0 


233 


23-5 


23-7 


23-9 


24.2 


24.4 




II 


24.6 


24.8 


25-1 


25-3 


25-5 


25-7 


25-9 


26.2 


26.4 


26.6 




12 


26.8 


27.1 


27-3 


27-5 


27.7 


28.0 


28.2 


28.4 


28.6 


28.9 




13 


29.1 


29-3 


295 


29.8 


30.0 


30.2 


30-4 


30.6 


30-9 


3I-I 




14 


31-3 


31-5 


31.8 


32.0 


32.2 


32.4 


32.7 


32.9 


33-1 


33-3 




15 


33-6 


33-8 


34-0 


34-2 


34-4 


34-7 


34-9 


35-1 


35-3 


35.6 




16 


35.8 


36.0 


36.2 


36.5 


36.7 


36.9 


37-1 


37-4 


37-6 


37.8 




17 


38.0 


38.3 


38.5 


38.7 


38.9 


39-1 


39-4 


39-6 


39-8 


40.0 




18 


40.3 


40.5 


40.7 


40.9 


41.2 


41.4 


41.6 


41.8 


42.1 


42.3 




19 


42.5 


42.7 


43- 


43-2 


43-4 


43-6 


43-8 


44.1 


44-3 


44-5 




20 


44-7 


45.0 


45-2 


45-4 


45-6 


45-9 


46.1 


46.3 


46.5 


46.8 




21 


47.0 


47.2 


47-4 


47.6 


47-9 


48.1 


48.3 


48.5 


48.8 


49.0 




22 


49.2 


49-4 


49-7 


49-9 


50.1 


50-3 


50.6 


50.8 


51.0 


51-2 




23 


51-5 


51-7 


51-9 


52.1 


52.3 


52.6 


52.8 


53 -o 


53-2 


53-5 




24 


53-7 


53-9 


54-1 


54-4 


54-6 


54.8 


55-0 


55-3 


55.5 


55-7 




25 


55-9 


56.1 


56.4 


56.6 


56.8 


57.0 


57-3 


57-5 


57-7 


57-9 




26 


58.2 


5S.4 


58.6 


58.8 


59-1 


59-3 


59-5 


59-7 


60.0 


60.2 




27 


60.4 


60.6 


60.8 


61. 1 


61.3 


61.5 


61.7 


62.0 


62.2 


62.4 




28 


62.6 


62.9 


63.1 


63.3 


63.5 


63.8 


64.0 


64.2 


64.4 


64.6 




29 


64.9 


65.1 


65.3 


65-5 


65.8 


66.0 


66.2 


66.4 


66.7 


66.9 




30 


67.1 


67.3 


67.6 


67.8 


68.0 


68.2 


68.5 


68.7 


68.9 


69.1 




31 


69-3 


69.6 


69.8 


70.0 


70.2 


70.5 


70.7 


70.9 


71. 1 


71.4 




32 


71.6 


71.8 


72.0 


72.3 


72.5 


72.7 


72.9 


73-1 


73-4 


73-6 




33 


73-8 


74.0 


74-3 


74-5 


74.7 


74-9 


75-2 


75-4 


75-6 


75.8 




34 


76.1 


76.3 


76.5 


76.7 


77.0 


77.2 


77-4 


77.6 


77.8 


78.1 




35 


78.3 


78.5 


78.7 


79.0 


79.2 


79-4 


79.6 


79-9 


80.1 


80.3 




36 


So. 5 


80.8 


81.0 


81.2 


81.4 


81.6. 


81.9 


82.1 


82.3 


82.5 




37 


82.8 


83.0 


83.2 


83-4 


83.7 


84.0 


84.1 


84.3 


84.6 


84.8 




38 


85.0 


85.2 


85.5 


85-7 


85.9 


86.1 


86.3 


86.6 


86.8 


87.0 




39 


87.2 


87.5 


87.7 


87.9 


88.1 


88.4 


88.6 


88.8 


89.0 


89-3 




40 


89-5 


89.7 


S9.9 


90.2 


90.4 


90.6 


90.8 


91.0 


91-3 


91-5 




41 


91.7 


91.9 


92.2 


92.4 


92.6 


92.8 


93-1 


93-3 


93-5 


93-7 




42 


94.0 


94.2 


94-4 


94.6 


94.8 


95-1 


95-3 


95-5 


95-7 


96.0 




43 


96.2 


96.4 


96.6 


96.9 


97.1 


97-3 


97-5 


97.8 


98.0 


98.2 




44 


98.4 


98.7 


98.9 


99.1 


99-3 


99-5 


99.8 


lOO.O 


100.2 


100.4 





Smithsonian Tables 



66 



Table 35. 



METERS PER SECOND INTO MILES PER HOUR. 



Meters per 
second. 


0.0 


0.1 


0.2 


0.3 


0.4 


0.5 


0.6 


0.7 


0.8 


0.9 ' 




Miles 


Miles 


Miles 


Miles 


MUes 


Miles 


Miles 


Miles 


Miles 


Miles ! 




per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. ; 


45 


100.7 


100.9 


lOI.I 


IOI.3 


IOI.6 


IOI.8 


102.0 


102.2 


102.5 


102.7 ' 


46 


102.9 


103.1 


103.3 


103.6 


103.8 


104.0 


104.2 


104.5 


104.7 


104.9 ] 


47 


105. 1 


105.4 


105.6 


105.8 


106.0 


106.3 


106.5 


106.7 


106.9 


107.2 : 


48 


107.4 


107.6 


107.8 


108.0 


108.3 


108.5 


108.7 


10S.9 


109.2 


109.4 ; 


49 


109.6 


109.8 


1 10. 1 


1 10. 3 


II0.5 


1 10. 7 


III.O 


III. 2 


III. 4 


III. 6 1 

j 


50 


III. 8 


112. 1 


II2.3 


II2.5 


112. 7 


II3.0 


II3.2 


"3-4 


113.6 


113.9 


51 


1 14. 1 


1 14-3 


1 14.5 


II4.8 


115.0 


II5.2 


II5.4 


115-7 


115-9 


116. 1 1 


52 


116.3 


116.6 


I16.8 


II7.0 


117. 2 


II7.4 


II7.7 


117.9 


1 18. 1 


118.3 1 


53 


118.6 


118.8 


II9.0 


II9.2 


119.5 


II9.7 


II9.9 


120. 1 


120.4 


120.6 1 


54 


120.8 


121. 


121.3 


121. 5 


121. 7 


121. 9 


122. 1 


122.4 


122.6 


122.8 ] 


55 


123.0 


123.3 


123.5 


123-7 


123.9 


124.2 


124.4 


124.6 


124.8 


125. 1 


56 


125.3 


125-5 


125.7 


126.0 


126.2 


126.4 


126.6 


126.8 


127.1 


127.3 


57 


127.5 


127.8 


128.0 


128.2 


128.4 


128.6 


128.9 


129. 1 


129.3 


129.5 


58 


129.7 


130.0 


130.2 


130.4 


130.7 


130.9 


I3I-I 


131-3 


131. 6 


131.8 


59 


132.0 


132,2 


132.5 


132.7 


132.9 


133- 1 


133-3 


133-6 


133-8 


134.0 



Table 36. 



MILES PER HOUR INTO METERS PER SECOND. 

I mile per hour = 0.4470409 meters per second. 



Miles per 
hour. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




meters 


meters 


meters 


meters 


meters 


meters 


meters 


meters 


meters 


meters 




per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 





0.00 


0.45 


0.89 


1.34 


1.79 


2.24 


2.68 


3.13 


3..58 


4.02 


10 


4.47 


4.92 


5.36 


5-81 


6.26 


6.71 


7-15 


7.60 


8.05 


8.49 


20 


8.94 


9-39 


9.83 


10.28 


10.73 


II. 18 


11.62 


12.07 


12.52 


12.96 


30 


13-41 


13.86 


14.31 


14.75 


15.20 


15.65 


16.09 


16.54 


16.99 


17.43 


40 


17.88 


18.33 


18.78 


19.22 


19.67 


20.12 


20.56 


21.01 


21.46 


21.90 


50 


22.35 


22.80 


23.25 


23.69 


24.14 


24.59 


25.03 


25.48 


25.93 


26.37 


60 


26.82 


27.27 


27.72 


28.16 


28.61 


29.06 


29.50 


29.95 


30.40 


30.85 


70 


31.29 


31.74 


32.19 


32.63 


33-08 


33-53 


33-98 


34-42 


34.87 


35.32 


80 


35-76 


36.21 


36.66 


37.10 


37-55 


38.00 


38-44 


38.89 


39-34 


39.79 


90 


40.23 


40.68 


41.13 


41.57 


42.02 


42.47 


42.92 


43.36 


43.81 


44.26 


100 


44-70 


45.15 


45.60 


46.04 


46.49 


46.94 


47.39 


47.83 


48. 28 


48.73 


no 


49-17 


49.62 


50.07 


50.51 


50-96 


51.41 


51.86 


52.30 


52.75 


53.20 


120 


53-64 


54.09 


54.54 


54.98 


55.43 


55.88 


56.33 


56.77 


57.22 


57-67 


130 


5S.12 


58.56 


59.01 


59-46 


59.90 


60.35 


60.80 


61.24 


61.69 


62.14 


140 


62.59 


63-03 


63.48 


63-93 


64.37 


64.82 


65.27 


65.72 


66.16 


66.61 



Smithsonian Tables. 



67 



Table 37. 



METERS PER SECOND INTO KILOMETERS PER HOUR. 

I meter per second = 3.6 kilometers per hour. 



Meters per 
second. 


0.0 


0.1 


0.2 


0.3 


0.4 


0.5 


0.6 


0.7 


0.8 


0.9 




kin. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 




per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 





0.0 


0.4 


0.7 


I.I 


1.4 


1.8 


2.2 


2-5 


2.9 


3-2 


I 


3-6 


4.0 


4-3 


4-7 


5-0 


5-4 


5-8 


6.1 


6.5 


6.8 


2 


7-2 


7-6 


7-9 


8-3 


8.6 


9-0 


9-4 


9-7 


10. 1 


10.4 


3 


10.8 


1 1.2 


II-5 


II. 9 


12.2 


12.6 


13.0 


13-3 


^2>-7 


14.0 


4 


14.4 


14.8 


15-I 


15-5 


15-8 


16.2 


16.6 


16.9 


T7-3 


17.6 


5 


18.0 


18.4 


18.7 


19. 1 


19.4 


19.8 


20.2 


20.5 


20.9 


21.2 


6 


21.6 


22.0 


22.3 


22.7 


23.0 


23-4 


23-8 


24.1 


24-5 


24. 8 


7 


2S.2 


25.6 


25-9 


26.3 


26.6 


27.0 


27.4 


27.7 


28.1 


28.4 


8 


28.8 


29.2 


29-5 


29-9 


30.2 


30.6 


31.0 


31-3 


31-7 


32.0 


9 


32.4 


32.8 


33-1 


33-5 


33-8 


34-2 


34-6 


34-9 


35-3 


35.6 


10 


36.0 


36.4 


36.7 


37-1 


37-4 


37.8 


38.2 


38.5 


38.9 


39-2 


II 


39-6 


40.0 


40.3 


40.7 


41.0 


41.4 


41.8 


42.1 


42.5 


42.8 


12 


43-2 


43-6 


43-9 


44-3 


44-6 


45-0 


45-4 


45-7 


46.1 


46.4 


13 


46.8 


47-2 


47-5 


47-9 


48.2 


48.6 


49-0 


49-3 


49-7 


50.0 


14 


50.4 


50.8 


5I-I 


51-5 


51-8 


52.2 


52.6 


52-9 


53-3 


53.6 


15 


54-0 


54-4 


54-7 


55-1 


55-4 


55.8 


56.2 


56.5 


56-9 


57-2 


16 


57-6 


58.0 


58.3 


58.7 


59-0 


59-4 


59-8 


60.1 


60.5 


60.8 


17 


61.2 


61.6 


61.9 


62.3 


62.6 


63.0 


63-4 


63-7 


64.1 


64.4 


18 


64.8 


65.2 


65-5 


65-9 


66.2 


66.6 


67.0 


67.3 


67.7 


68.0 


19 


68.4 


68.8 


69.1 


69-5 


69.8 


70.2 


70.6 


70.9 


71-3 


71.6 


20 


72.0 


72.4 


72.7 


73-1 


73-4 


73.8 


74-2 


74-5 


74-9 


75.2 


21 


75.6 


76.0 


76.3 


76.7 


77.0 


77-4 


77-8 


78.1 


7S.5 


78.8 


22 


79.2 


79-6 


79-9 


80.3 


80.6 


81.0 


81.4 


81.7 


82.1 


82.4 


23 


82.8 


83.2 


83-5 


83-9 


84.2 


84.6 


S5.0 


85-3 


85-7 


86.0 


24 


S6.4 


86.8 


87.1 


87-5 


S7.8 


88.2 


88.6 


88.9 


89-3 


89.6 


25 


90.0 


90.4 


90.7 


91. 1 


91.4 


91.8 


92.2 


92-5 


92.9 


93-2 


26 


93-6 


94.0 


94-3 


94-7 


95-0 


95-4 


95-8 


96.1 


96-5 


96.8 


27 


97.2 


97-6 


97-9 


98.3 


98.6 


99.0 


99-4 


99-7 


100. 1 


100.4 


28 


100.8 


101.2 


101.5 


101.9 


102.2 


102.6 


103.0 


103-3 


103.7 


104.0 


29 


104.4 


104.8 


105. 1 


105.5 


105.8 


106.2 


106.6 


106.9 


107.3 


107.6 


30 


108.0 


108.4 


10S.7 


109. 1 


109.4 


109.8 


110.2 


110.5 


110.9 


111.2 


31 


III. 6 


112.0 


112.3 


112. 7 


113.0 


113-4 


113.8 


114.1 


1 14-5 


114.8 


32 


115. 2 


II5-6 


115-9 


116.3 


116.6 


117.0 


117.4 


117.7 


iiS.i 


118.4 


33 


118.8 


119.2 


119-5 


1 19.9 


120.2 


120.6 


121.0 


121.3 


121. 7 


122.0 


34 


122.4 


122.8 


123.1 


123.5 


123.8 


124.2 


124.6 


124.9 


125-3 


125.6 


35 


126.0 


126.4 


126.7 


127. 1 


127.4 


127.8 


128.2 


128.5 


12S.9 


129.2 


36 


129.6 


130.0 


130-3 


130.7 


131. 


131-4. 


131-8 


132. 1 


132-5 


132.8 


37 


133-2 


133-6 


133-9 


134-3 


134.6 


135-0 


135-4 


135-7 


136.1 


136.4 


38 


136.8 


137.2 


137-5 


137-9 


138.2 


138.6 


139.0 


139-3 


139-7 


140.0 


39 


140.4 


140.8 


141. 1 


141-5 


141. 8 


142.2 


142.6 


142.9 


^AZ-o 


143.6 


40 


144.0 


144.4 


144-7 


I45-I 


145-4 


145-8 


146.2 


146.5 


146.9 


147.2 


41 


147.6 


148.0 


148.3 


148.7 


T49.0 


149-4 


149-8 


150. 1 


150.5 


150.8 


42 


151-2 


151-6 


151-9 


152.3 


152.6 


153-0 


153-4 


153-7 


154- 1 


154-4 


43 


154-8 


155-2 


155-5 


155-9 


156.2 


156.6 


I57-0 


157.3 


157.7 


158.0 


44 


158.4 


158-8 


159- 1 


159-5 


159-8 


160.2 


160.6 


160.9 


161.3 


161.6 



6mith«3ni>n Tables. 



68 



Table 37. 



METERS PER SECOND INTO KILOMETERS PER HOUR. 



Meters per 
second. 


0.0 


0.1 


0.2 


0.3 


0.4 


0.5 


0.6 


0.7 


0.8 


0.9 




km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 


km. 




per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


per hr. 


45 


162.0 


162.4 


162.7 


163. 1 


163.4 


163.8 


164.2 


164.5 


164.9 


165.2 


46 


165.6 


166.0 


166.3 


166.7 


167.0 


167.4 


167.8 


168. 1 


168.5 


168.8 


47 


169.2 


169.6 


169.9 


170.3 


170.6 


171. 


171.4 


171. 7 


172. 1 


172.4 


48 


172.S 


173.2 


173-5 


173-9 


174.2 


174-6 


175-0 


175-3 


175-7 


176.0 


49 


176.4 


176.8 


177.1 


177-5 


177.8 


17S.2 


178.6 


178.9 


179-3 


179-6 


50 


180.0 


180.4 


180.7 


181. 1 


181. 4 


181.8 


182.2 


182.5 


182.9 


183.2 


5i 


183.6 


184.0 


184.3 


184.7 


185.0 


185.4 


185.8 


186. 1 


186.5 


186.8 


52 


187.2 


187.6 


187.9 


188.3 


188.6 


189.0 


189.4 


189.7 


190. 1 


190.4 


53 


190.8 


191. 2 


191-5 


191. 9 


192.2 


192.6 


193.0 


193-3 


193-7 


194.0 


54 


194.4 


194.8 


195- 1 


195-5 


195-8 


196.2 


196.6 


196.9 


197.3 


197.6 


55 


198.0 


198.4 


198.7 


199. 1 


199.4 


199.8 


200.2 


200.5 


200.9 


201.2 


56 


2or.6 


202.0 


202.3 


202.7 


203.0 


203.4 


203.8 


204.1 


204.5 


204.8 


57 


205.2 


205.6 


205.9 


206.3 


206.6 


207.0 


207.4 


207.7 


208.1 


208.4 


58 


208.8 


209.2 


209.5 


209.9 


210.2 


210.6 


211. 


211.3 


211. 7 


212.0 


59 


212.4 


212.8 


213.1 


213-5 


213.8 


214.2 


214.6 


214.9 


215.3 


215.6 



Table 38. 



KILOMETERS PER HOUR INTO METERS PER SECOND. 

I kilometer per hour= . meters per second. 
36 *^ 



Kilometers 
per hour. 





1 


2 


3 


4 


5 


6 


7 


8 


9 




meters 


meters 


meters 


meters 


meters 


meters 


meters 


meters 


meters 


meters 




per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 


per sec. 





0.00 


0.28 


0.56 


0.83 


I. II 


1-39 


1.67 


1-94 


2.22 


2.50 


10 


2.7S 


3.06 


3-33 


3-61 


3-89 


4.17 


4.44 


4-72 


5.00 


5-28 


20 


5.56 


5-83 


6.11 


6-39 


6.67 


6.94 


7.22 


7.50 


7.78 


8.06 


30 


8-33 


8.61 


8.89 


9.17 


9-44 


9-72 


10.00 


10.28 


10.56 


10.83 


40 


II. II 


11-39 


11.67 


11.94 


12.22 


12.50 


12.78 


13.06 


13.33 


13.61 


50 


13-89 


14.17 


14.44 


14-72 


15.00 


15-28 


15.56 


15.83 


16. 1 1 


16.39 


60 


16.67 


16.94 


17.22 


17-50 


17.78 


18.06 


18.33 


18.61 


18.89 


19.17 


70 


19.44 


19.72 


20.00 


20.28 


20.56 


20.83 


21. II 


21.39 


21.67 


21.94 


80 


22.22 


22.50 


22.78 


23.06 


23-33 


23.61 


23.89 


24.17 


24.44 


24.72 


90 


25.00 


25.2S 


25.56 


25.83 


26.11 


26.39 


26.67 


26.94 


27.22 


27.50 


100 


27-78 


28.06 


28.33 


28.61 


28.89 


29.17 


29.44 


29.72 


30.00 


30.28 


no 


30.56 


30-S3 


31. II 


31.39 


31-67 


31.94 


32.22 


32.50 


32.78 


33.06 


120 


33-33 


33-61 


33-89 


34.17 


34-44 


34.72 


35-00 


35-28 


35.56 


35.83 


130 


36.11 


36.39 


36.67 


36.94 


37.22 


37-50 


37-78 


38.06 


38.33 


38.61 


140 


38-89 


39-17 


39-44 


39.72 


40.00 


40.28 


40-56 


40.83 


41. II 


41.39 


150 


41.67 


41.94 


42.22 


42.50 


42.78 


43.06 


43-33 


43.61 


43-89 


44.17 


160 


44-44 


44.72 


45-00 


45.28 


45-56 


45-83 


46.11 


46-39 


46.67 


46.94 


170 


47-22 


47-50 


47.78 


48.06 


48-33 


48.61 


48.89 


49-17 


49-44 


49.72 


180 


50.00 


50.28 


50.56 


50.83 


5i.li 


51-39 


51.67 


5^94 


52.22 


52.50 


190 


52.78 


53-06 


53.33 


53.61 


53.89 


54.17 


54-44 


54.72 


55.00 


55.28 



Smith80ni*n Tables. 



69 



Table 39. 



SCALE OF VELOCITY EQUIVALENTS OF THE SO-CALLED BEAUFORT 

SCALE OF WIND. 



Beaufort 
Number, 


Beaufort 

description 

of wind. 






Specification 
for use on land 


Limits of velocity 




Deep Sea Criterion. 
1874, International 


Miles per hour 


Meters 




Interna- 


Interna- 
tional 








tional 






Nautical 
(knots) 


Statute 


per sec. 







Calm 




Calm, smoke rises 


Less 


Less 


Less than 










vertically. 


than 1 


than 1 


0.4 




1 


Light air 


Just sufficient 
to give steer- 
age way.' 


Direction of wind 
shown by smoke 
drift, but not by 
wind vanes. 


1 to 3 


1 to 3 


0.4 to 1.5 




2 


Light 
breeze 


That in which a 
well-condi- 
tioned man-of- 
war, with all 


1 to 2 knots 


Wind felt on face; 
leaves rustle; ordi- 
nary vane moved 
by wind. 


4 to 6 


4 to 7 


1.6 to 3.3 




3 


Gentle 
breeze 


sail set, and 
!■ clean full, 
1 would go in 

smooth water 
1 from — 


3 to 4 knots 


Leaves and small twigs 
in constant motion; 
wind extends light 
flag. 


7 to 10 


8 to 12 


3.4 to 5.4 




4 


Moderate 
breeze 


i 


5 to 6 knots 


Raises dust and loose 
paper; small 
branches are moved. 


11 to 16 


13 to 18 


5.5 to 7.9 




5 


Fresh 
breeze 


That to which 1 Royals. &c 
she could just 
carry in chase, 
full and by — 


Small trees in leaf 
begin to sway; 
crested wavelets 
form on inland 
waters. 


17 to 21 


19 to 24 


8.0 to 10.7 




6 


Strong 
breeze 


Top gallant 

J J sails. 


Large branches in 
motion; whistling 
heard in telegraph 
wires; umbrellas 
used with difficulty. 


22 to 27 


25 to 31 


10.8 to 13.8 




7 


Moderate 
gale 


That to which 
she could just 
carry in chase, 
full and by — 


Tonsails, 

jlD, &C. 


Whole trees in mo- 
tion; inconvenience 
felt when walking 
against wind. 


28 to 33 


32 to 38 


13.9 to 17.1 




8 


Fresh 
gale 




Reefed up- 
per top- 
sails and 
courses 


Breaks twigs off trees; 
generally impedes 
progress. 


34 to 40 


39 to 46 


17.2 to 20.7 




9 


Strong 
gale 




Lower top- 
sails and 
courses. 


Slight structural dam- 
age occurs (chimney 
pots and slate 


41 to 47 


47 to 54 


20.8 to 24.4 










removed). 










10 


Whole 
gale 


That with which 
she could 
scarcely bear 
lower maintop- 
sail and reefed 
foresail. 


Seldom experienced 
inland; trees up- 
rooted; considerable 
structural damage 
occurs. 


48 to 55 


55 to 63 


24.5 to 28.4 




11 


Storm 


That which 
would reduce 
her to storm 

stay-sails. 


\'ery rarely experi- 
enced, accompanied 
by wide-spread 
damage. 


56 to 65 


64 to 75 


28.5 to 33.5 




12 


Hurri- 
cane 


That which no 
canvas could 
withstand. 




.Vbove 65 


Above 75 


Above 33.5 





' A full-rigged ship of 1874. 
Smithsonian Tables 



70 



Table 40. 
RADIUS OF CRITICAL CURVATURE AND VELOCITIES OF GRADIENT 
WINDS FOR FRICTIONLESS MOTION IN HIGHS AND LOWS. 

English Measures. 

Re = radius of critical curvature in miles. Vc High = maximum speed in miles per hour on 
isobar of critical curvature. Vs = speed along straight line isobars = 0.5 Vc. F Low = speed in 
Low along isobar of curvature Re. V Low = 0.4142 Ve. 

The table is computed for a density of the air, p = .0010, which represents the conditions 
in the free air at an elevation of, roughly, one mile. Values for any other density can be readily 
found by dividing each or any of the tabulated values by the ratio of the densities, as, for ex- 
ample, for surface conditions divide by 1.2 = and so on. 



Lati- 
tude: 


d (miles) 


























</) 






100 


125 


150 


175 


200 


250 


300 


400 


500 


600 


800 


10° 


Re 




8160 


6530 


5440 


4660 


4080 


3260 


2720 


2040 


1630 


1360 


1020 




Ve 


High 


372 


298 


248 


212 


186 


149 


124 


930 


74-4 


62.0 


46.5 




Vs 




186 


149 


124 


106 


930 


74-4 


62.0 


46.5 


37-2 


310 


23.2 




V 


Low 


154 


123 


103 


88.0 


77.0 


61.6 


513 


38.5 


30.8 


25- 7 


19. 2 


20 


Re 




2100 


1680 


1400 


1200 


1050 


841 


701 


526 


420 


350 


263 




Ve 


High 


189 


151 


126 


108 


94-4 


75-5 


62.9 


47.2 


37.8 


31-5 


23.6 




Vs 




94-4 


75-5 


62.9 


54.0 


47.2 


37.8 


314 


23.6 


18.9 


15-8 


II. 8 




V 


Low 


78.2 


62. s 


52.1 


44-7 


39- 1 


31-3 


26. 1 


19.6 


15-7 


130 


9.8 


25 


Re 




1380 


HOC 


918 


787 


688 


551 


459 


344 


27s 


230 


172 




Vc 


High 


153 


122 


102 


87.3 


76.4 


61. 1 


50.9 


38.2 


30.6 


25-5 


19. 1 




Vs 




76.4 


61. 1 


50.9 


43-6 


38.2 


30.6 


254 


19. 1 


153 


12.8 


9-5 




V 


Low 


63- 3 


50.6 


42.2 


36.2 


31.6 


253 


21. I 


15. s 


12.7 


10.6 


7-9 


30 


Re 




984 


787 


656 


562 


.492 


393 


328 


246 


197 


164 


123 




Ve 


High 


129 


103 


86.1 


73-8 


64-5 


51.6 


430 


32.3 


25.8 


21-5 


16. 1 




Vs 




64- 5 


51.6 


43- 


369 


32.2 


25.8 


21-5 


16. 2 


12.9 


10.8 


8. 


I 




V 


Low 


53-5 


42.8 


35-7 


30.6 


26.7 


21.4 


17 8 


134 


10.7 


8.9 


6. 


7 


35 


Re 




747 


598 


498 


427 


374 


299 


249 


187 


150 


125 


93 


4 




Vc 


High 


112 


90.0 


7S-0 


64- 3 


56.3 


450 


37-5 


28.1 


22.5 


18.8 


14- 


I 




Vs 




56.3 


4S-0 


37-5 


32.2 


28.2 


22.5 


18.8 


14.0 


II. 2 


9-4 


7- 







V 


Low 


46.6 


37-3 


311 


26.6 


23-3 


18.6 


155 


II. 6 


9-3 


7.8 


5- 


8 


40 


Re 




595 


476 


397 


340 


298 


238 


198 


149 


119 


99.2 


74 


4 




Ve 


High 


100 


80.3 


66.9 


57-4 


50.2 


40. 2 


33- 5 


25-1 


20. 1 


16.7 


12 


6 




Vs 




50.2 


40. 2 


33-4 


28.7 


25- I 


20. 1 


16.8 


12.6 


10.0 


8.4 


6 


3 




V Low 


41.6 


33-3 


27.7 


23.8 


20.8 


16.7 


139 


10.4 


8.3 


6.9 


5 


2 


45 


Re 




492 


393 


328 


281 


246 


197 


164 


123 


98.4 


82.0 


61 


5 




Vc 


High 


913 


730 


60.9 


52.2 


45-6 


36. 5 


30.4 


22.8 


18.3 


15-2 


II 


4 




Vs 




45-6 


36.5 


30.4 


26. 1 


22.8 


18.2 


152 


II. 4 


9.2 


7.6 


5 


7 




V 


Low 


37-8 


30.2 


25.2 


21.6 


18.9 


151 


12.6 


9-4 


7.6 


6.3 


4 


7 


50 


Re 




419 


335 


279 


240 


210 


168 


140 


105 


83.8 


69.9 


52 


4 




Vc 


High 


84.3 


67.4 


56.2 


48.2 


42.1 


33-7 


28.1 


21. 1 


16.9 


14.0 


10 


5 




Vs 




42.1 


33-7 


28.1 


24.1 


21.0 


16.8 


14.0 


10.6 


8.4 


7.0 


5 


3 




V 


Low 


34-9 


27.9 


23-3 


20.0 


17-4 


14.0 


II. 6 


8.7 


7.0 


5-8 


4 


4 


55 


Re 




366 


293 


244 


209 


183 


147 


122 


91.6 


73-3 


61. 1 


45 


8 




Vc 


High 


78.8 


63.0 


52.5 


45-0 


39-4 


315 


26.3 


19.7 


15-8 


13 I 


9 


.8 




Vs 




39-4 


31-5 


26. 2 


22.5 


19.7 


15.8 


13.2 


9.8 


7-9 


6.6 


4 


9 




V 


Low 


32.6 


26. 1 


21.7 


18.6 


16.3 


13.0 


10.9 


8.2 


6.5 


5-4 


4 


I 


60 


Re 




328 


262 


219 


187 


164 


131 


109 


82.0 


65.6 


54-7 


41 







Ve 


High 


74-5 


59-6 


49-7 


42.6 


37-3 


29.8 


24.8 


18.6 


14.9 


12.4 


9 


3 




Vs 




37-3 


29.8 


24.8 


21.3 


18.6 


14.9 


12.4 


9-3 


7-4 


6.2 


4 


7 




V 


Low 


30- 9 


24.7 


20.6 


17.6 


I5-S 


12.3 


10.3 


7-7 


6.2 


51 


3 


9 


65 


Re 




299 


240 


200 


171 


150 


120 


99.8 


74.8 


59-9 


49-9 


37 


4 




Ve 


High 


71.2 


57- o 


47-5 


40.7 


35-6 


28.5 


23-7 


17.8 


14.2 


II. 9 


8 


9 




Vs 




35-6 


28. 5 


23.8 


20.4 


17.8 


14.2 


II. 8 


8.9 


71 


6.0 


4 


4 




V 


Low 


29-5 


?3.6 


19.7 


16. Q 


14.7 


II. 8 


9.8 


7-4 


5-9 


4-9 


3.7 || 



SMITHSONrAN TABLES. 



71 



Table 40. 

RADIUS OF CRITICAL CURVATURE AND VELOCITIES OF GRADIENT 
WINDS FOR FRICTIONLESS MOTION IN HIGHS AND LOWS. 

English Measures. 





d (miles) 














Lati- 
















tude: 




100 


125 


150 


175 


200 


250 


300 


400 


500 


600 


800 

34-8 




70° 


Re 


278 


223 


186 


159 


139 


III 


92.8 


69.6 


55-7 


46.4 






Vc High 


68.7 


55-0 


4.=;.« 


39-3 


34-3 


27-5 


22.9 


17.2 


13- 


7 


II. 


4 


8.6 






Vs 


34-3 


27-5 


22.9 


19-6 


17.2 


13.8 


II. 4 


8.6 


6 


8 


5 


7 


4-3 






V Low 


28.5 


22.8 


19.0 


16.3 


14.2 


II. 4 


9-5 


7-1 


5 


7 


4 


7 


3-6 




7S 


Re 


264 


211 


176 


151 


132 


105 


87.9 


65 -9 


52 


7 


43 


9 


33 ■ 






Vc High 


66.8 


53- S 


44.6 


3«-2 


33-4 


26. 7 


22.3 


16.7 


13 


4 


II 


I 


8.4 






Vs 


33-4 


26.8 


22.3 


19.1 


16.7 


13 -4 


II. 2 


8.4 


6 


7 


5 





4.2 






V Low 


27.7 


22. 2 


18.5 


is.« 


I3.« 


II. I 


9.2 


6.9 


5 


b 


4 


6 


3-5 




80 


Re 


254 


203 


169 


145 


127 


lOI 


84..^ 


63-4 


so 


7 


42 


3 


31.7 






Vc High 


65-5 


52.4 


43-7 


37-5 


32.8 


26,2 


21.8 


16.4 


13 


I 


10 


9 


8.2 






Vs 


S2.8 


26.2 


21.8 


18.8 


16.4 


13- 1 


10. Q 


8.2 





b 


5 


4 


4-1 






V Low 


27.1 


21.7 


18. 1 


15s 


13-6 


10.9 


9.0 


6.8 


,S 


4 


4 


5 


3-4 




8^ 


Re 


248 


198 


165 


142 


124 


99.1 


82.6 


62.0 


1 49 


6 


41 


3 


310 






Vc High 


64.8 


,Si.« 


43-2 


37-0 


32-4 


259 


21.6 


16.2 


i 13 





10 


8 


8.1 






Vs 


32-4 


25 -9 


21.6 


18.5 


16.2 


13.0 


10.8 


8.1 








.■) 


4 


4.0 






V Low 


26.8 


21.5 


17.9 


153 


134 


10.7 


8.9 


6.7 


5 


4 


4 


.S 


3-4 




90 


Re 


246 


197 


164 


140 


123 


98.4 


82. 


61.5 


49 


2 


41 





,^0.7 






Vc Hi-h 


64.6 


,Si.6 


43- 


369 


32.3 


25.8 


21. 5 


16. 1 


12 


9 


10 


8 


8.1 






Vs 


323 


2S.8 


21.5 


18.4 


16. 2 


12.9 


10.8 


8.0 


i <^ 


•4 


5 


•4 


4.0 






V Low 


26.8 1 21.4 


17.8 


15-3 


13-4 


10.7 


8.9 


0.7 


! 5-3 


45 


3-3 





Table 41 . 

RADIUS OF CRITICAL CURVATURE AND VELOCITIES OF GRADIENT 
WINDS FOR FRICTIONLESS MOTION IN H/CHS AND LOWS. 

Metric Measures. 

Re = radius of critical curvature in kilometers. Ve High = maximum speed in meters per 
second on isobar of critical curvature. Vs = speed along straight line isobars = 0.5 Vc. V Low = 
speed in Low along isobar of curvature Re- V Low = 0.4142 Vc. 

The remarks in heading of Table 40 relative to the density of the air apply equally to Table 41. 



Lati- 
tude: 


d (kilometers) \ 

1 






1 
















•P 




100 


125 


150 


175 


200 


250 


300 


400 


500 


600 


800 

1040 


10° 


Re 


8330 


6660 


5550 


4760 


4160 


3330 


2780 


2080 


1670 


1390 




Ve High 


105 


84.3 


70. 2 


60. 2 


52.7 


42.1 


35- 1 


26.3 


21. 1 


17.6 


13.2 




Vs 


.■?2.7 


42.2 


351 


30.1 


26.4 


21.0 


17.6 


13- 2 


10 6 


8.8 


6.6 




V Low 


43- S 


34-9 


29. 1 


24.9 


21.8 


17-4 


145 


10.9 


8.7 


7-3 


5-5 


20 


Re 


2140 


1710 


1430 


1220 


1070 


857 


714 


,S36 


429 


357 


268 




Vc High 


S3-S 


42.8 


35-6 


30.5 


26.7 


21.4 


17.8 


13-4 


10.7 


8.9 


6.7 




Vs 


26. 7 


21.4 


17.8 


15-2 


134 


10.7 


8.9 


6.7 


5-4 


4-4 


3-4 




V Low 


22. 2 


X7.7 


14.7 


12.6 


II. I 


8.9 


7-4 


5.6 


4-4 


3-7 


2.8 


2S 


Re 


.1400 


II 20 


936 


802 


702 


562 


468 


351 


281 


234 


17s 




Ve High 


43-3 


34-6 


28.8 


24.7 


21.6 


17-3 


14.4 


10.8 


8.7 


7.2 


5-4 




Vs 


21.6 


17-3 


14.4 


12.4 


10.8 


8.6 


7.2 


5-4 


4-4 


3-6 


2.7 




V Low 


17.9 


14-3 


II. 9 


10. 2 


8.9 


7.2 


6.0 


4-5 


3.6 


3-0 


2. 2 


30 


Re 


1003 


802 


669 


573 


SOI 


401 


334 


251 


201 


167 


125 j 




Vc High 


36.6 


29- 3 


24.4 


20.9 


18.3 


14.6 


12. 2 


9.1 


7-3 


6.1 


4.6 




Vs 


18.3 


14.6 


12. 2 


10.4 


9.2 


7-3 


6.1 


4.6 


3-6 


30 


2-3 




V Low 


152 


12. 1 


lO. I 


8.7 


7-6 


6.0 


51 


3.8^ 


30 


2.5 


1.9 



Sm'thsonian Tables. 



72 



Table 41, 
RADIUS OF CRITICAL CURVATURE AND VELOCITIES OF GRADIENT 
WINDS FOR FRICTIONLESS MOTION IN HIGHS AND LOWS. 

Metric Measures. 



Lati- 










d (kilometers) 












tude 

4> 






















































100 


125 


150 


175 


200 


250 


300 


400 


500 


600 


800 


35° 


Re 


762 


610 


508 


435 


381 


305 


254 


191 


152 


127 


95-3 
4.0 




Vc High 


319 


25-5 


21.3 


18.2 


159 


12.8 


10.6 


8.0 


6.4 


5-3 




Vs 


15-9 


12,8 


10.6 


9.1 


8.0 


6.4 


5-3 


4.0 


3- 2 


2.6 


2. 




V Low 


13.2 


10.6 


8.8 


7-5 


6.6 


5-3 


4.4 


Zi 


2.7 


2. 2 


1-7 


40 


Re 


607 


485 


40s 


347 


303 


243 


202 


152 


121 


lOI 


75-8 
3-6 




Vc High 


28.4 


22.8 


19.0 


16.3 


14.2 


II. 4 


9-5 


71 


5-7 


4- 7 




Fs 


14.2 


II. 4 


9-5 


8.2 


7-1 


5-7 


4.8 


3-6 


2.8 


2-4 


1.8 




V Low 


II. 8 


9-4 


7-9 


6.8 


5-9 


4-7 


3-9 


2.9 


2.4 


1.9 


1-5 


45 


Re 


501 


401 


334 


287 


251 


201 


167 


125 


100 


S3. 6 


62. 7 




Ve High 


25-9 


20. 7 


17.2 


14.8 


12.9 


10.3 


8.6 


6.5 


5-2 


4-3 


3. 2 




Vs 


12.9 


10.4 


8.6 


7-4 


6.4 


5-2 


4-3 


3-2 


2.6 


2. 2 


1.6 




V Low 


10. 7 


8.6 


71 


6.1 


5-3 


4-3 


3-6 


2.7 


2. 2 


1.8 


1-3 


50 


Re 


427 


342 


285 


244 


214 


171 


142 


107 


85.5 


71. 2 


53-4 




Ve High 


239 


19. 1 


15-9 


13-6 


II. 9 


9-5 


8.0 


6.0 


4.8 


4.0 


3.0 




Vs 


II. 9 


9.6 


8.0 


6.8 


6.0 


4.8 


4.0 


3-0 


2-4 


2.0 


I. 5 




V Low 


9.9 


7-9 


6.6 


5-6 


4.9 


3-9 


2>-2> 


2-5 


2.0 


1-7 


I. 2 


55 


Re 


374 


299 


249 


213 


187 


149 


125 


93-4 


74-7 


62.3 


46. 7 




Ve High 


22.3 


17.9 


14.9 


12.8 


II. 2 


8.9 


7-4 


5-6 


4-5 


3-7 


2.8 




Vs 


II. 2 


9.0 


7-4 


6.4 


5.6 


4-4 


3-7 


2.8 


2. 2 


1.8 


1-4 




V Low 


9.2 


7-4 


6.2 


5-3 


4.6 


3-7 


31 


2-3 


1.9 


1-5 


I. 2 


60 


Re 


334 


267 


223 


191 


167 


134 


III 


83.6 


66.9 


55-7 


41.8 




Vc High 


21. 1 


16.9 


14. 1 


12. 1 


10.6 


8.4 


7.0 


5-3 


4.2 


3-5 


2.6 




Vs 


10.6 


8.4 


7.0 


6.0 


5-3 


4.2 


3-5 


2.6 


2. 1 


1.8 


1.3 




V Low 


8.7 


7.0 


5.8 


50 


4-4 


3-5 


2.9 


2. 2 


1-7 


1-4 


I. I 


65 


Re 


305 


244 


204 


174 


153 


122 


102 


76.3 


61.0 


50.9 


38.2 




Vc High 


20. 2 


16. 1 


134 


II-5 


10. I 


8.1 


6.7 


5-0 


4.0 


3-4 


2-5 




Vs 


10. 1 


8.0 


6.7 


5.8 


50 


4.0 


3-4 


2-5 


2.0 


1-7 


I. 2 




V Low 


8.4 


6.7 


5-6 


4-8 


4-2 


3-4 


2.8 


2. I 


1-7 


1.4 


I.O 


70 


Re 


284 


227 


189 


162 


142 


114 


94.6 


71.0 


56.8 


47-3 


35-5 




Ve High 


19-5 


15-6 


13.0 


II. I 


9-7 


7.8 


6.5 


4-9 


3-9 


3-2 


2.4 




Vs 


9-7 


7.8 


6.5 


5-6 


4.8 


3-9 


3-2 


2.4 


2.0 


1.6 


I. 2 




V Low 


8.1 


6.5 


5-4 


4.6 


4.0 


3-2 


2.7 


2.0 


1.6 


1-3 


1.0 


75 


^. 


269 


215 


179 


154 


134 


107 


89.6 


67.2 


53-7 


44-8 


33-6 




7c High 


18.9 


151 


12.6 


10.8 


9-5 


7.6 


6.3 


4-7 


3-8 


3-2 


2.4 




Vs 


9-5 


7.6 


6.3 


5-4 


4.8 


3-8 


3-2 


2.4 


1.9 


1.6 


I. 2 




V Low 


7.8 


6.3 


5-2 


4-5 


3-9 


31 


2.6 


1.9 


1.6 


1-3 


1.0 


80 


i?c 


259 


207 


172 


148 


129 


103 


86.2 


64.6 


51-7 


43 I 


32.3 




Ve High 


18.6 


14.9 


12.4 


10.6 


9-3 


7-4 


6.2 


4.6 


3-7 


31 


2-3 




Ft 


9-3 


7-4 


6.2 


5 3 


4.6 


3-7 


31 


2-3 


1.8 


1.6 


I. 2 




F Low 


7-7 


6.2 


51 


4-4 


3-9 


31 


2.6 


1.9 


1-5 


13 


1.0 


85 


Re 


253 


202 


168 


144 


126 


lOI 


84.2 


63.2 


50.5 


42.1 


31.6 




Vc High 


18.4 


14-7 


12. 2 


IO-5 


9.2 


7-3 


6.1 


4.6 


3-7 


31 


2-3 




Fj 


9.2 


7-4 


6.1 


5-2 


4.6 


3-6 


30 


2-3 


1.8 


1.6 


I. 2 




F Low 


7.6 


6.1 


51 


4-3 


3.8 


30 


2.5 


1.9 


1-5 


1-3 


1.0 


90 


Re 


251 


201 


167 


145 


125 


100 


83.6 


62.7 


50.1 


41.8 


313 




Ve Pligh 


18.3 


14.6 


12. 2 


10.4 


9.1 


7-3 


6.1 


4.6 


3-7 


30 


2-3 




Fs 


9.1 


7-3 


6.1 


5-2 


4.6 


3-6 


30 


2-3 


1.8 


1-5 


I. 2 




F Low 


7.6 


6.0 


5- I 


4-3 


3-8 


3-0 


2-5 


1.9 


1-5 


I. 2 


1.0 



Smithsonian Tables. 



73 



REDUCTION OF TEMPERATURE TO SEA LEVEL. 



English measures „.,..... Table 42 

Metric measures Table 43 



Table 42. 



REDUCTION OF TEMPERATURE TO SEA LEVEL. 

ENGLISH MEASURES. 



Rate of 


DIFFERENCES BETWEEN TEE TEMPERATURE AT ANY ALTITUDE 


decrease 

1 °' 
temper- 


AND AT SEA LEVEL. 
















ature. 

1°F. 
for 


ALTITUDE IN FEET. 


































1 


every 


100 


200 


300 


400 


500 


600 


700 


800 


900 


1000 2000 

i 


3000 


4000 


5000 


Feet. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F. 


F, 


200 


o?50 


i?oo 


i?50 


2?00 


2?50 


3?oo 


3-50 


4?oo 


4-50 


5?oo 


io?oo 


15-00 


20?00 


25?00 


205 


0.49 


0.98 


X.46 


1-95 


2.44 


2-93 


3-41 


3-90 


4-39 


4.88 


9.76 


14.63 


19-51 


24-39 


210 


0.48 


0.95 


1.43 


1.90 


2.38 


2.86 


3-33 


3-8i 


4.29 


4.76 


9-52 


14.29 


19-05 


23-81 


215 


0.47 


0.93 


1.40 


1.86 


2-33 


2.79 


3-26 


3-72 


4.19 


4-65 


9-30 


13-95 


18.60 


23-26 


220 


0.45 


0.91 


1.36 


1.82 


2.27 


2.73 


3.18 


3-64 


4.09 


4-55 


9.09 


13-63 


18.18 


22.72 


230 


0.43 


0.87 


1.30 


1.74 


2.17 


2.61 


3-04 


3-48 


3-91 


4-35 


8.70 


13.04 


17.39 


21.74 


240 


0.42 


0.83 


1-25 


1.67 


2.08 


2.50 


2.92 


3-33 


3-75 


4.17 


8.33 


12.50 


16.67 


20.83 


250 


0.40 


o.So 


1.20 


1.60 


2.00 


2.40 


2.80 


3.20 


3.60 


4.00 


8.00 


12.00 


16.00 


20.00 


260 


0.38 


0.77 


I.I5 


1-54 


1.92 


2.31 


2.69 


3.08 


3-46 


3.85 


7.69 


11-54 


15-38 


19.23 


270 


0.37 


0.74 


I. II 


1.48 


1.85 


2.22 


2.59 


2.96 


3-33 


3- 70 


7.41 


II. II 


14.81 


18.52 


280 


0.36 


0.71 


1.07 


1-43 


1.79 


2.14 


2.50 


2.86 


3.21 


3-57 


7.14 


10.71 


14.29 


17.86 


290 


0.34 


0.69 


1.03 


1.38 


1-73 


2.07 


2.41 


2.76 


3.10 


3-45 


6.90 


10.34 


13-79 


17.24 


300 


0-33 


0.67 


1. 00 


1-33 


1.67 


2.00 


2.33 


2.67 


3.00 


3-33 


6.67 


10.00 


13-33 


16.67 


310 


0.32 


0.65 


0.97 


1.29 


1. 61 


1.94 


2.26 


2.58 


2.90 


3-23 


6.45 


9.68 


12.90 


16.13 


320 


0.31 


0.62 


0.94 


1-25 


1.56 


1.S7 


2.19 


2.50 


2.81 


3.12 


6.25 


9-37 


12.50 


15.62 


340 


0.29 


0.59 


0.88 


1. 18 


1.47 


1.76 


2.06 


2.35 


2.65 


2.94 


5-88 


8.82 


11.76 


14.71 


360 


0.28 


0.56 


0.83 


I. II 


1-39 


1.67 


1.94 


2.22 


2.50 


2.78 


5.56 


8-33 


II. II 


13-89 


380 


0.26 


0.53 


0.79 


1.05 


1.32 


1.58 


1. 84 


2.10 


2.37 


2.63 


5.26 


7.89 


10.53 


13.16 


400 


0.25 


0.50 


0.75 


1. 00 


1-25 


1.50 


1-75 


2.00 


2.25 


2.50 


5.00 


7-50 


10.00 


12.50 


1 420 


0.24 


0.48 


0.71 


0.95 


1. 19 


1-43 


1.67 


1.90 


2.14 


2.38 


4.76 


7.14 


9-52 


11.90 


440 


0.23 


0.45 


0.68 


0.91 


1. 14 


1.36 


1-59 


1.82 


2.05 


2.27 


4-55 


6.82 


9.09 


11.36 


460 


0.22 


0.43 


0.65 


0.87 


1.09 


1.30 


1-52 


1.74 


1.96 


2.17 


4-35 


6.52 


8.70 


10.87 


480 


0.21 


0.42 


0.62 


0.83 


1.04 


1-25 


1.46 


1.67 


1.87 


2.08 


4.17 


6.25 


8.33 


10.42 


500 


0.20 


0.40 


0.60 


0.80 


1. 00 


1.20 


1.40 


1.60 


1.80 


2.00 


4.00 


6.00 


8.00 


10.00 


520 


0.19 


0.38 


0.58 


0.77 


0.96 


I-I5 


1-35 


1-54 


1-73 


1.92 


3.85 


5-77 


7.69 


9.62 


540 


0.19 


0.37 


0.56 


0.74 


0-93 


I. II 


1.30 


1.48 


1.67 


1.85 


3- 70 


5.56 


7.41 


9.26 


560 


0.18 


0.36 


0.54 


0.71 


0.89 


1.07 


1.25 


1-43 


1.61 


1.79 


3-57 


5.36 


7.14 


8-93 


580 


0.17 


0.34 


0.52 


0.69 


0.86 


1.03 


1. 21 


1.38 


1-55 


1.72 


3-45 


5-17 


6.90 


8.62 


600 


0.17 


0.33 


0.50 


0.67 


0.83 


1. 00 


1.17 


1.33 


1.50 


1.67 


3-33 


5-00 


6.67 


8-33 


620 


0.16 


0.32 


0.48 


0.65 


0.81 


0.97 


I-I3 


1.29 


1.45 


1.61 


3-23 


4.84 


6.45 


8.06 


650 


0.15 


0.31 


0.46 


0.62 


0.77 


0.92 


1.08 


1.23 


1.3S 


1.54 


3.08 


4.62 


6.15 


7.69 


700 


0.14 


0.29 


0.43 


0.57 


0.71 


0.86 


1. 00 


1.14 


1.29 


1.43 


2.86 


4.29 


5-71 


7.14 


750 


0.13 


0.27 


0.40 


0.53 


0.67 


0.80 


0.93 


1.07 


1.20 


1-33 


2.67 


4.00 


5-33 


6.67 


800 


0.12 


0.25 


0.37 


0.50 


0.62 


0.75 


0.87 


1. 00 


1. 12 


1.25 


2.50 


3-75 


5.00 


6.25 


850 


0.12 


0.24 


0.35 


0.47 


0-59 


0.71 


0.82 


0.94 


1.06 


1. 18 


2.35 


3-53 


4.71 


5-88 


900 


O.II 


0.22 


0.33 


0.44 


0.56 


0.67 


0.78 


0.89 


1. 00 


I. II 


2.22 


3-33 


4.44 


5-56 


Tabular values are to be added to the observed tern 


peratu 


re to c 


)btain 


the temperature at sea level. 









Smithsonian Tablc* 



76 



Table 43. 



REDUCTION OF TEMPERATURE TO SEA LEVEL. 

METRIC MEASURES. 



Rate of 

decrease 

of 




DIFFERENCES BETWEEN 


THE TEMPERATURE 


AT ANY ALTITUDE | 










AND AT SEA LEVEL. 








temper- 
ature. 
1°C. 
for 
every 
























ALTITUDE IN METERS. 


100 


200 


300 


400 


500 


600 


700 


800 


900 


1000 


2000 3000 1 


111. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


c. 


C. 


100 


i?oo 


2?00 


3?oo 


4?oo 


5°oo 


6?oo 


7?oo 


8?oo 


9?oo 


io?oo 


20?00 


3o?oo 


I02 


0.98 


1.96 


2.94 


3-92 


4.90 


5-88 


6.86 


7.84 


8.82 


9.80 


19.61 


29.41 


104 


0.96 


1.92 


2.88 


3.85 


4.81 


5-77 


6.73 


7.69 


8.65 


9.62 


19.23 


28.85 


106 


0.94 


1.89 


2.83 


3-77 


4.72 


5.66 


6.60 


7-55 


8.49 


9-43 


18.87 


28.30 


108 


0-93 


1.85 


2.78 


3-70 


4-63 


5.56 


6.48 


7.41 


8.33 


9.26 


18.52 


27.78 


no 


0.91 


1.82 


2.73 


3.64 


4-55 


5-45 


6.36 


7.27 


8.18 


9.09 


18.18 


27.27 


"5 


0.87 


1.74 


2.61 


3-48 


4-35 


5-22 


6.09 


6.96 


7.83 


8.70 


17-39 


26.09 


120 


0.83 


1.67 


2.50 


3-33 


4.17 


5-00 


5.83 


6.67 


7- 50 


8.33 


16.67 


25.00 


125 


0.80 


1.60 


2.40 


3.20 


4.00 


4.80 


5.60 


6.40 


7.20 


8.00 


16.00 


24.00 


130 


0.77 


1-54 


2.31 


3-o8 


3-85 


4.62 


5.38 


6.15 


6.92 


7.69 


15-38 


23.08 


135 


0.74 


1.48 


2.22 


2.96 


3- 70 


4.44 


5-19 


5-93 


6.66 


7.41 


14.81 


22.22 


140 


0.71 


1-43 


2.14 


2.86 


3-57 


4.29 


5-00 


5-71 


6.43 


7.14 


14.29 


21.43 


145 


0.69 


1.38 


2.07 


2.76 


3-45 


4.14 


4.83 


5-52 


6.21 


6.90 


13-79 


20.69 


150 


0.67 


1-33 


2.00 


2.67 


3-33 


4.00 


4.67 


5-33 


6.00 


6.67 


13-33 


20.00 


155 


0.65 


1.29 


1.94 


2.58 


3-23 


3.87 


4.52 


5-16 


5-8i 


6.45 


12.90 


19-35 


160 


0.62 


1-25 


1.87 


2.50 


3.12 


3-75 


4-37 


5-00 


5.62 


6.25 


12.50 


18.75 


170 


0-59 


1. 18 


1.76 


2-35 


2.94 


3-53 


4.12 


4.70 


5-29 


5-88 


11.76 


17-65 


180 


0.56 


I. II 


1.67 


2.22 


2.78 


3-33 


3-89 


4.44 


5.00 


5.56 


II. II 


16.67 


190 


0.53 


1.05 


1.58 


2.10 


2.63 


3-16 


3-68 


4.21 


4-74 


5-26 


10.53 


15-79 


200 


0.50 


1. 00 


1.50 


2.00 


2.50 


3.00 


3-50 


4.00 


4- 50 


5.00 


10.00 


15.00 


210 


0.48 


0.95 


1-43 


1.90 


2.38 


2.86 


3-33 


3-81 


4.29 


4.76 


9-52 


14.29 


220 


0.45 


0.91 


1.36 


1.82 


2.27 


2.73 


3.18 


3-64 


4.09 


4-55 


9.09 


13.64 


230 


0.43 


0.87 


1.30 


1.74 


2.17 


2.61 


3-04 


3-48 


3-91 


4-35 


8.70 


13.04 


240 


0.42 


0.83 


1-25 


1.67 


2.08 


2.50 


2.92 


3-33 


3-75 


4.17 


8-33 


12.50 


250 


0.40 


0.80 


1.20 


1.60 


2.00 


2.40 


2.80 


3.20 


3.60 


4.00 


8.00 


12.00 


260 


0.38 


0.77 


I-I5 


1-54 


1.92 


2.31 


2.69 


3.08 


3-46 


3-85 


7.69 


11-54 


270 


0.37 


0.74 


I. II 


1.48 


1.85 


2.22 


2-59 


2.96 


3-33 


3- 70 


7.41 


II. II 


280 


0.36 


0.71 


1.07 


1-43 


1.79 


2.14 


2.50 


2.86 


3.21 


3-57 


7.14 


10.71 


290 


0.34 


0.69 


1.03 


1.38 


1.72 


2.07 


2.41 


2.76 


3.10 


3-45 


6.90 


10.34 


300 


0-33 


0.67 


1. 00 


1-33 


1.67 


2.CX) 


2-33 


2.67 


3.00 


3-33 


6.67 


10.00 


320 


0.31 


0.62 


0.94 


1.25 


1.56 


1.87 


2.19 


2.50 


2.81 


3.12 


625 


9-37 


340 


0.29 


0.59 


0.88 


1. 18 


1.47 


1.76 


2.06 


2.35 


2.65 


2.94 


5-S8 


8.82 


360 


0.28 


0.56 


0.83 


I. II 


1-39 


1.67 


1.94 


2.22 


2.50 


2.78 


5-56 


8-33 


380 


0.26 


0.53 


0.79 


1.05 


1.32 


1.58 


1.84 


2.10 


2.37 


2.63 


5-26 


7.89 


400 


0.25 


0.50 


0.75 


1. 00 


1.25 


1.50 


1-75 


2.00 


2.25 


2.50 


5.00 


7-50 


420 


0.24 


0.48 


0.71 


0.95 


1.19 


1-43 


1.67 


1.90 


2.14 


2.38 


4.76 


7.14 


440 


0.23 


0.45 


0.68 


0.91 


1. 14 


1.36 


1-59 


1.82 


2.05 


2.27 


4-55 


6.82 


460 


0.22 


0.43 


0.65 


0.87 


1.09 


1.30 


1-52 


1.74 


1.96 


2.17 


4-35 


6.52 


480 


0.21 


0.42 


0.62 


0.83 


1.04 


1-25 


1.46 


1.67 


1.87 


2.08 


4.17 


6.25 


500 


0.20 


0.40 


0.60 


0.80 


1. 00 


1.20 


1.40 


1.60 


1.80 


2.00 


4.00 


6.00 


1 


Tabuh 


ir valu 


es are 


to be 


added 


to the 


observ 


ed ten 


iperati 


ire to 


obtain 










the t 


em per 


iture a 


t sea 1 


evel. 









tMiTHtoNfAN Tables. 



77 



REDUCTION OF BAROMETER READINGS TO 
STANDARD UNITS 



Reduction of the barometer to standard temperature — 

English measures Table 44 

Metric measures Table 45 

Reduction of the mercurial column to standard temperature. 
(For U-sha])ed manometers with 1)rass scales.) 

English measures Table 46 

Metric measures Table 47 

Reduction of the mercurial barometer to standard gravity. 

Direct reduction from local to standard gravity .... Table 48 

Reduction through variation with latitude — 

English measures Table 49 

Metric measures Table 50 



Table 44. 

REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther. 
mometer 
Fahren- 
heit. 


i 
HEIGHT OF THE BAROMETER IN INCHES. 


19.0 


19.5 


20.0 


20,5 


21.0 


21.5 


22.0 


22,5 


23.0 


23,5 


F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


0?0 


fo.050 


+0,051 


+0.052 


+0.053 


+0.055 


+0,056 


+0.057 


+0.059 


+0.060 


+0.061 


+0.5 


-f-0.049 


+0.050 


+0,051 


+0.053 


+0.054 


+0.055 


+0.056 


+0.058 


+0.059 


+0.060 


I.O 


.048 


.049 


•050 


,052 


.053 


.054 


.055 


.057 


.058 


•059 


1.5 


.047 


.048 


.049 


,051 


,052 


.053 


.054 


.056 


•057 


.058 


2.0 


.046 


.047 


.049 


.050 


,051 


.052 


•053 


.055 


.056 


•057 


2.5 


•045 


.046 


,048 


,049 


.050 


.051 


.052 


.054 


•055 


.056 


3.0 


-ho. 044 


+0,046 


+0.047 


+0.048 


+0.049 


+0.050 


+0.051 


+0.053 


+ 0.054 


+0.055 


3.5 


.043 


.045 


.046 


•047 


.048 


.049 


.050 


.051 


•053 


•054 


4.0 


.043 


.044 


.045 


,046 


.047 


,048 


.049 


.050 


•052 


•053 


4-5 


.042 


.043 


.044 


•045 


.046 


,047 


.048 


.049 


.051 


.052 


5-0 


.041 


,042 


.043 


.044 


•045 


,046 


.047 


.048 


.049 


.051 


5.5 


-f-0.040 


+0.041 


+0.042 


+0.043 


+0.044 


+0.045 


+0.046 


+0.047 


+0.048 


+0.049 


6.0 


•039 


,040 


.041 


.042 


•043 


.044 


■045 


.046 


.047 


.048 


6.5 


.038 


.039 


.040 


.041 


.042 


.043 


.044 


.045 


.046 


.047 


7.0 


•037 


.038 


•039 


.040 


.041 


.042 


.043 


.044 


.045 


.046 


7.5 


•037 


.038 


.038 


.039 


.040 


.041 


.042 


•043 


.044 


•045 


8.0 


fO.036 


+0.037 


+0.038 


+0.038 


+0.039 


+0.040 


+0.041 


+0.042 


+0.043 


+0.044 


8.5 


•035 


.036 


•037 


.038 


,038 


•039 


,040 


,041 


,042 


•043 


9.0 


.034 


.035 


.036 


.037 


.038 


.038 


.039 


.040 


.041 


.042 


9-5 


•033 


.034 


•035 


.036 


.037 


•037 


.038 


•039 


,040 


.041 


lO.O 


.032 


.033 


•034 


•035 


.036 


.036 


•037 


.038 


•039 


.040 


10.5 


fO.031 


+0.032 


+0.033 


+0.034 


+0.035 


+0.035 


+0.036 


+0.037 


+0.038 


+0.039 


II. 


.030 


,031 


.032 


•033 


.034 


.034 


.035 


.036 


•037 


.038 


11-5 


.030 


.030 


.031 


.032 


•033 


•034 


.034 


.035 


.036 


.037 


12.0 


.029 


.030 


.030 


.031 


.032 


•033 


•033 


•034 


•035 


.036 


12.5 


.028 


,029 


.029 


.030 


.031 


,032 


.032 


•033 


.034 


•034 


rs.o 


-1-0.027 


+0.028 


+0.028 


+0.029 


+0.030 


+0.031 


+0.031 


+0.032 


+0.033 


+0.033 


13-5 


.026 


.027 


,028 


.028 


.029 


,030 


,030 


.031 


.032 


.032 


14.0 


.025 


,026 


,027 


.027 


.028 


,029 


.029 


• 030 


.031 


.031 


14.5 


.024 


.025 


.026 


.026 


.027 


,028 


.028 


.029 


.030 


.030 


15.0 


.024 


.024 


.025 


,025 


.026 


.027 


,027 


.028 


,029 


.029 


15.5 


+0.023 


+0.023 


+0.024 


+0,024 


+0.025 


+0.026 


+0.026 


+0.027 


+0.027 


+0.028 


16.0 


.022 


.023 


.023 


,024 


.024 


,025 


,025 


.026 


.026 


.027 


16.5 


.021 


.022 


,022 


.023 


,023 


,024 


.024 


.025 


.025 


.026 


17.0 


.020 


,021 


.021 


.022 


.022 


.023 


,023 


.024 


.024 


.025 


17.5 


.019 


,020 


,020 


.021 


.021 


,022 


.022 


,023 


.023 


.024 


18.0 


+0.018 


+0.019 


+0.019 


+0.020 


+0.020 


+0.021 


+0.021 


+0.022 


+0.022 


+0.023 


18.5 


.017 


,018 


.018 


,019 


,019 


.020 


.020 


.021 


.021 


.022 


19.0 


.017 


,017 


.018 


,018 


,018 


.019 


.019 


,020 


.020 


.021 


19-5 


.016 


,016 


,017 


,017 


,017 


.018 


,018 


.019 


.019 


.02c 


20.0 


.015 


.015 


.016 


,016 


,016 


,017 


.017 


.018 


,018 


.018 


20.5 


+0.014 


+0.014 


+0.015 


+0.015 


+0.016 


+0.016 


+0.016 


+0.017 


+0.017 


+0.017 


2[.0 


.013 


.014 


,014 


.014 


.015 


.015 


,015 


.016 


,016 


.016 


21-5 


.012 


.013 


,013 


.013 


.014 


.014 


,014 


.015 


.015 


.015 


22.0 


.Oil 


.012 


.012 


.012 


.013 


.013 


.013 


.014 


.014 


.014 


22.5 


.oil 


.Oil 


.Oil 


.Oil 


.012 


.012 


,012 


.013 


.013 


.013 


23.0 


+0.010 


+0.010 


+0.010 


+0.010 


+0.01 1 


+ O.OII 


+0.01 1 


+0.012 


+0.012 


+0.012 


23-5 


.009 


.009 


.009 


,010 


.010 


.010 


,010 


.Oil 


.Oil 


.Oil 


24.0 


.008 


.008 


,008 


.009 


.009 


.009 


,009 


.010 


.010 


.010 


24-5 


.007 


.007 


.008 


.008 


.008 


.008 


.008 


.009 


.009 


.009 


25.0 


.006 


.006 


.007 


.007 


.007 


.007 


.007 


.008 


.008 


.008 



Bmithsonian Tables. 



80 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 
Ther- 






HEIGHT OF 


rHE BAROMETER IN INCHE.S. 








mometer 
























Fahren- 
heit. 


19.0 


19.5 


20.0 


20.5 


21.0 


21.5 


22.0 


22.5 


23.0 


23.5 




F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 




25?5 


-f-0.005 


+0.006 


+0.006 


+0.006 


-]-o.oo6 


+0.006 


+0.006 


+0.006 


+0.007 


+0.007 




26.0 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.006 




26.5 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.005 




27.0 


.003 


.003 


.003 


.003 


.003 


•003 


.003 


.003 


•003 


.003 




27-5 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 




28.0 


-fO.CX)I 


+0.001 


+0.001 


+0.001 


+0.001 


+0.001 


+0.001 


+0.001 


+ 0.001 


+0.001 




28.5 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 




29.0 


— O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


— O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 




29-5 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 




30.0 


.002 


.002 


.002 


.003 


•003 


.003 


.003 


.003 


•003 


.003 




30.5 


-0.003 


-0.003 


-0.003 


-0.003 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 




31.0 


.004 


.004 


.004 


.004 


.005 


.005 


.005 


.005 


.005 


■005 




31-5 


.005 


.005 


.005 


.005 


•005 


.006 


.006 


.006 


.006 


.006 




32.0 


.006 


.006 


.006 


.006 


.006 


.007 


.007 


.007 


.007 


.007 




32.5 


.007 


.007 


.007 


.007 


.007 


.008 


.008 


.008 


.008 


.008 




33.0 


—0.008 


—0.008 


—0.008 


—0.008 


—0.008 


—0.009 


—0.009 


—0.009 


—0.009 


—0.009 




33-5 


.008 


.009 


.009 


.009 


.009 


.010 


.010 


.010 


.010 


.010 




34- 


.009 


.010 


.010 


.010 


.010 


.010 


.oil 


.oil 


.oil 


.oil 




34-5 


.010 


.010 


.oil 


.oil 


.oil 


.oil 


.012 


.012 


.012 


.013 




35-0 


.oil 


.oil 


.012 


.012 


.012 


.012 


.013 


■013 


.013 


.014 




35.5 


—0.012 


—0.012 


—0.012 


-0.013 


-0.013 


-0.013 


—0.014 


—0.014 


—0.014 


—0.015 




36.0 


.013 


.013 


.013 


.014 


.014 


.014 


.015 


.015 


.015 


.016 




36.5 


.014 


.014 


.014 


.015 


.015 


.015 


.016 


.016 


.016 


.017 




1 37-0 


.014 


.015 


.015 


.016 


.016 


.016 


.017 


.017 


.017 


.018 




I 37-5 


.015 


.016 


.016 


.017 


.017 


.017 


.018 


.018 


.019 


.019 




38.0 


—0.016 


—0.017 


—0.017 


—0.017 


—0.018 


—0.018 


—0.019 


—0.019 


—0.020 


—0.020 




38.5 


.017 


.017 


.018 


.018 


.019 


.019 


.020 


.020 


.021 


.021 




39-0 


.018 


.018 


.019 


.019 


.020 


.020 


.021^ 


.021 


.022 


.022 




39-5 


.019 


.019 


.020 


.020 


.021 


.021 


.022 


.022 


.023 


•023 




40.0 


.020 


.020 


.021 


.021 


.022 


.022 


.023 


.023 


.024 


.024 




40.5 


-0.020 


—0.021 


—0.022 


—0.022 


-0.023 


-0.023 


—0.024 


—0.024 


-0.025 


-0.025 




41.0 


.021 


.022 


.022 


.023 


.024 


.024 


.025 


.025 


.026 


.026 




41-5 


.022 


.023 


.023 


.024 


.025 


•025 


.026 


.026 


.027 


.027 




42.0 


.023 


.024 


.024 


.025 


.025 


.026 


.027 


.027 


.028 


.029 




42.5 


.024 


.025 


.025 


.026 


.026 


.027 


.028 


.028 


.029 


.030 




43.0 


-0.025 


-0.025 


—0.026 


—0.027 


—0.027 


—0.028 


—0.029 


—0.029 


-0.030 


-0.031 




43-5 


.026 


.026 


.027 


.028 


.028 


.029 


.030 


.030 


.031 


•032 




44.0 


.026 


.027 


.028 


.029 


.029 


•030 


.031 


.031 


.032 


•033 




44-5 


.027 


.028 


.029 


.030 


.030 


.031 


.032 


.032 


■033 


•034 




45-0 


.028 


.029 


.030 


.030 


.031 


.032 


•033 


■033 


•034 


•035 




45.5 


—0.029 


-0.030 


-0.031 


-0.031 


-0.032 


-0.033 


-0.034 


-0.034 


-0.035 


—0.036 




46.0 


.030 


.031 


.031 


.032 


•033 


•034 


•035 


■035 


.036 


•037 




46.5 


.031 


.032 


.032 


■033 


•034 


•035 


•036 


.036 


•037 


.038 




47.0 


.032 


.032 


•033 


•034 


•035 


.036 


•037 


•037 


.038 


•039 




1 47-5 


•033 


•033 


•034 


•035 


.036 


■037 


.038 


.038 


•039 


.040 




48.0 


-0.033 


-0.034 


-0.035 


-0.036 


-0.037 


-0.038 


-0.039 


—0.040 


—0.040 


—0.041 




48.5 


■034 


■035 


•036 


•037 


•038 


•039 


.040 


.041 


.041 


.042 




49.0 


•035 


.036 


•037 


•03S 


•039 


.040 


.041 


.042 


.042 


•043 




49-5 


.036 


•037 


.038 


•039 


.040 


.041 


.042 


•043 


■044 


.044 




50.0 


. -"^^ 


.038 


•039 


.040 


.041 


.042 


•043 


■044 


0.45 


.046 





Smithsonian Tables. 



81 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES 



Attached 

Ther- 
mometer 
Fahren- 
heit. 






HEIGHT OF 


rHE BAROMETER IN INCHES. 






19.0 


19.5 


20.0 


20.5 


21.0 


21.5 


22.0 


22.5 


23.0 


23.5 


F. 


Inch. 


luch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch 


Inch. 


50?5 


-0.038 


-0.039 


—0.040 


—0.041 


—0.042 


-0.043 


—0.044 


-0.045 


—0.046 


— 0.047 


51.0 


•039 


.040 


.041 


.042 


•043 


•044 


•045 


.046 


0.47 


.048 


51-5 


•039 


.040 


.041 


.042 


.044 


•045 


.046 


.047 


.048 


.049 


52.0 


.040 


.041 


.042 


•043 


.044 


.046 


.047 


.048 


•049 


.050 


52.5 


.041 


.042 


•043 


.044 


•045 


.047 


.048 


.049 


.050 


.051 


53.0 


—0.042 


-0.043 


— 0.044 


-0.045 


—0.046 


-0.047 


—0.049 


-0.050 


-0.051 


-0.052 


53-5 


•043 


.044 


•045 


.046 


.047 


.048 


.050 


.051 


.052 


•053 


54.0 


.044 


•045 


.046 


.047 


.048 


.049 


.051 


.052 


.053 


•054 


54-5 


•045 


.046 


.047 


.048 


.049 


• 050 


.052 


•053 


.054 


•055 


55-0 


.045 


.047 


.048 


.049 


.050 


.051 


.053 


■054 


.055 


.056 ! 


55.5 


—0.046 


-0.047 


—0.049 


-0.050 


-0.051 


-0.052 


-0.054 


-0.055 


-0.056 


-0.057 


56.0 


.047 


.048 


.050 


.051 


.052 


•053 


.055 


.056 


•057 


.058 


56.5 


.048 


.049 


.050 


.052 


•053 


•054 


.056 


.057 


.058 


■059 


57-0 


.049 


.050 


.051 


•053 


•054 


•055 


.057 


.058 


.059 


.060 


57-5 


.050 


.051 


.052 


.054 


.055 


.056 


.058 


.059 


.060 


.061 


58.0 


-0.051 


-0.052 


-0.053 


-0.055 


-0.056 


-0.057 


-0.059 


—0.060 


—0.061 


-0.063 


5«-5 


.051 


•053 


.054 


.055 


•057 


.058 


.060 


.061 


.062 


.064 


59-0 


.052 


•054 


•055 


•056 


.05S 


•059 


.061 


.062 


.063 


.065 


59-5 


•053 


•055 


.056 


.057 


•059 


.060 


.061 


.063 


.064 


.066 


60.0 


•054 


•055 


•057 


.058 


.060 


.061 


.062 


.064 


.065 


.067 


60.5 


-"•055 


-0.056 


-0.058 


-0.059 


—0.061 


—0.062 


-0.063 


-0.065 


—0.066 


-0.068 


61.0 


.056 


•057 


.059 


.060 


.062 


,063 


.064 


.066 


.067 


.069 


61.5 


•057 


.058 


.060 


.061 


.062 


.064 


.065 


.067 


.068 


.070 


62.0 


•057 


•059 


.060 


.062 


.063 


.065 


.066 


.068 


.069 


.071 


62.5 


.058 


.060 


.061 


.063 


.064 


.066 


.067 


.069 


.071 


.072 


63.0 


-0.059 


—0.061 


—0.062 


—0.064 


-0.065 


—0.067 


—0.068 


—0.070 


—0.072 


-0.073 


63.5 


.060 


.062 


.063 


.065 


.066 


0.68 


.069 


.071 


•073 


.074 


64.0 


.061 


.062 


.064 


.066 


.067 


.069 


.070 


.072 


.074 


•075 


64-5 


.062 


.063 


.065 


.067 


.068 


.070 


.071 


•073 


•075 


.076 


65.0 


.063 


.064 


.066 


.067 


.069 


.071 


.072 


•074 


.076 


.077 


65.5 


-0.063 


—0.065 


—0.067 


-Q.068 


—0.070 


—0.072 


-0.073 


-0.075 


—0.077 


—0.078 


66.0 


.064 


.066 


.068 


.069 


.071 


•073 


.074 


.076 


.078 


.079 


66.5 


.065 


.067 


.069 


.070 


.072 


•074 


•075 


.077 


.079 


.081 


67.0 


.066 


.068 


.069 


.071 


.073 


•075 


.076 


.078 


.080 


.082 


67.5 


.067 


.069 


.070 


.072 


.074 


.076 


•077 


.079 


.oSi 


.083 


68.0 


-0.068 


—0.069 


—0.071 


-0.073 


-0.075 


-0.077 


—0.078 


—0.080 


—0.082 


—0.084 


68.5 


.069 


.070 


.072 


.074 


.076 


.078 


.079 


.081 


.083 


.0S5 


69.0 


.069 


.071 


•073 


•075 


.077 


.079 


.080 


.082 


.084 


.086 


69.5 


.070 


.072 


.074 


.076 


.078 


.079 


.081 


.083 


.085 


.087 


70.0 


.071 


•073 


•075 


.077 


.079 


.080 


.082 


.084 


.086 


.088 


! 70.5 


—0.072 


-0.074 


—0.076 


—0.078 


—0.080 


—0.081 


-0.083 


-0.085 


—0.087 


—0.089 


71.0 


•073 


•075 


.077 


.079 


.080 


.082 


.084 


.086 


.088 


.090 


71-5 


.074 


.076 


.078 


-079 


.081 


.083 


.085 


.087 


.089 


.091 


72.0 


•075 


.076 


.078 


.080 


.082 


.084 


.086 


.088 


.090 


.092 


72.5 


■075 


.077 


.079 


.081 


.083 


.085 


.087 


.089 


.091 


•093 


73.0 


—0.076 


-0.078 


—0.080 


—0.082 


—0.084 


-0.086 


-0.088 


—0.090 


—0.092 


-0.094 


73-5 


.077 


.079 


.081 


.083 


.085 


.087 


.089 


.091 


■093 


•095 


74.0 


.078 


.080 


.082 


.084 


.086 


.088 


.090 


.092 


.094 


.096 


74-5 


.079 


.081 


.083 


.085 


.087 


.089 


.091 


•093 


•095 


.097 


75-0 


.080 


.082 


.084 


.086 


.088 


.090 


.092 


•094 


.096 


.099 



Smithsonian Tables. 



82 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 
Ther- 


'^ 




HEIGHT OF THE BAROMETER IN INCHES. 






mometer 
] Fahren 
heit. 




















19.0 


19.5 


20.0 


20.5 


21.0 


21.5 


22.0 22.5 


23.0 


23.5 


F. 


Inch. 


Inch. 


Inch 


Inch. 


Inch. 


Inch. 


Inch, i Inch. 


Inch. 


Inch. 


75?5 


— 0.081 


-0.083 


-0.085 


—0.087 


—0.089 


—0.091 


-0.093 -0.095 


-0.097 


— 0. 100 


76.0 


.081 


.084 


.086 


.088 


.090 


.092 


.094 


.096 


.098 


.101 


76.5 


.082 


.084 


.087 


.089 


.091 


•093 


•095 


.097 


.100 


.102 


77.0 


.083 


.085 


.087 


.090 


.092 


.094 


.096 


.098 


.101 


.103 


77-5 


.084 


.086 


.088 


.091 


•093 


•095 


.097 


.099 


.102 


.104 


78.0 


-0.085 


—0.087 


—0.089 


— 0.091 


-0.094 


— 0.096 


—0.098 


— 0. 100 


-0. 103 


-0.105 


78.5 


.086 


.088 


.090 


.092 


■095 


.097 


.099 


.101 


.104 


.106 


79.0 


.086 


.089 


.091 


•093 


.096 


.098 


.100 


.102 


.105 


.107 


79-5 


.087 


.090 


.092 


.094 


.097 


.099 


.101 


.103 


.106 


.108 


80.0 


.088 


.091 


•093 


•095 


.097 


.100 


.102 


.104 


.107 


.109 


80.5 


-0.089 


— 0.091 


-0.094 


— 0.096 


—0.098 


— O.IOI 


-0. 103 


-0.105 


— 0.108 


—O.I 10 


Si.o 


.090 


.092 


•095 


.097 


.099 


.102 


.104 


.106 


.109 


.111 


81.5 


.091 


•093 


.096 


.098 


.100 


.103 


.105 


.107 


.110 


.112 


S2.0 


.092 


.094 


.096 


.099 


.101 


.104 


.106 


.108 


.111 


•"3 


82.5 


.092 


■095 


.097 


.100 


.102 


.105 


.107 


.109 


.112 


.114 


83.0 


-0.093 


—0.096 


— 0.098 


— O.IOI 


-0. 103 


—0.106 


—0.108 


— 0. 1 1 1 


-O.I 13 


-O.I 15 


83-5 


.094 


.097 


.099 


.102 


.104 


.107 


.109 


.112 


.114 


.117 


84.0 


•095 


.098 


.100 


.103 


.105 


.108 


.110 


•113 


.115 


.118 


84-5 


.096 


.098 


.101 


.103 


.106 


.108 


.III 


.114 


.116 


.119 


85.0 


.097 


.099 


.102 


.104 


.107 


.109 


.112 


■115 


.117 


.120 


85.5 


—0.098 


— 0. 100 


-0.103 


-0.105 


— 0. 108 


—O.I 10 


-O.II3 


—0.1 16 


-0.1 18 


—0.121 


86.0 


.098 


.101 


.104 


.106 


.109 


.III 


.114 


■^^l 


.119 


. 122 


86.5 


.099 


.102 


.105 


.107 


.110 


.112 


•115 


.118 


. 120 


.123 


87.0 


.100 


.103 


.105 


.108 


.III 


•113 


.116 


.119 


.121 


.124 


87.5 


.!OI 


.104 


.106 


.109 


.112 


.114 


.117 


.120 


.122 


•125 


88.0 


— 0.102 


-0.105 


— 0.107 


—O.I 10 


-O.I 13 


-O.I 15 


-O.I 18 


—0.1 21 


-0.123 


— 0.126 


88. 5 


.103 


.105 


.108 


.III 


.114 


.116 


.119 


.122 


.124 


.127 


89.0 


.104 


. 106 


.109 


.112 


.114 


.117 


.120 


•123 


•125 


.128 


89-5 


.104 


.107 


.110 


•113 


•115 


.118 


.121 


.124 


.126 


.129 


90.0 


.105 


.108 


.III 


.114 


.116 


.119 


.122 .125 


.127 


.130 


90.5 


— 0. 106 


— 0. 109 


— 0. I I 2 


—O.I 14 


—O.I 17 


— 0.120 


-0.123 


— 0. 1 26 


-0.128 


-O.I3I 


91.0 


.107 


.110 


•113 


• 115 


.118 


.121 


.124 


.127 


.129 


.132 


91-5 


.108 


.III 


•113 


.116 


.119 


.122 


■125 


.128 


■131 


•133 


92.0 


.109 


.112 


.114 


.117 


.120 


.123 


.126 ! .129 


.132 


■134 


92-5 


.110 


.112 


■115 


.118 


.121 


.124 


.127 .130 


•133 


■135 


93.0 


—O.I 10 


-O.I 13 


— O.I16 


—O.I 19 


— 0.122 


— 0.12 = 


— 0.128 — 0. 131 


-0. 134 


-0.137 


93-5 


.III 


.114 


.117 


.120 


.123 


. I 2D 


.129 


.132 


•135 


.138 


94.0 


.112 


•115 


.118 


.121 


.124 


.127 


• 130 


•133 


.136 


■139 


94-5 


•113 


.116 


.119 


.122 


■125 


.128 


•131 


•134 


•137 


.140 


95-0 


.114 


.117 


. 120 


■123 


.126 


.129 


.132 


■13^ 


.138 


.141 


95.5 


-O.I 15 


-O.I18 


— 0.12 I 


— 0.124 


— 0.127 


-0.130 


-0.133 


-0.136 


-0.139 


— 0. 142 


96.0 


•115 


.119 


.122 


•125 


.128 


■131 


■134 


■137 


.140 


• >43 


96.5 


.116 


.119 


.122 


.126 


.129 


.132 


•135 


.138 


.141 


.144 


97.0 


.117 


.120 


.123 


.126 


.130 


•133 


.136 


•139 


.142 


•145 


97-5 


.118 


.121 


.124 


.127 


.130 


■134 


• 137 1 -HO 


•■43 


.146 


98.0 


—O.I 19 


— 0.122 


-0.125 


-0.128 


-O.I3I 


-0.135 


—0.138 — 0. 141 


-0. 144 


-0.147 


98. 5 


.120 


.123 


.126 


.129 


.132 


•135 


•139; -142 


■143 


.148 


99.0 


.121 


.124 


.127 


.130 


•133 


.136 


•140 1 .143 


.146 


.149 


99-5 


.121 


•125 


.128 


•131 


•134 


•T37 


.141 


.144 


■147 


.150 


lOO.O 


.122 


.126 


.129 


.132 


•135 


.138 


.142 


•145 


.148 


•151 



Smithsonian Tables. 



83 



"Table 44. 

REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 
Ther- 


HEIGHT OF THE BAROMETER IN INCHES. 


mometer 
Fahren- 
heit. 




24.0 


24.2 


24.4 


24.6 


24.8 


25.0 


25.2 


25.4 


25.6 


25.8 


F. 


Inch. 


luch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


0?0 


-1-0.063 


+0.063 


+0.064 


+0.064 


+0.065 


+0.065 


+0.066 


+0.066 


+0.067 


+0.067 


+0.5 


-I-O.061 


+0.062 


+0.063 


+0.063 


+0.064 


+0.064 


+0.065 


+0.065 


+0.066 


+0.066 


I.O 


.060 


.061 1 .061 


.062 


.062 


.063 


.063 


.064 


.064 


.065 


1-5 


•059 


.060 


.060 


.061 


.061 


.062 


.062 


.063 


.063 


.064 


2.0 


.058 


•059 


•059 


.060 


.060 


.061 


.061 


.062 


.062 


•063 


2.5 


•C57 


.058 


.058 


•059 


•059 


•059 


.060 


.060 


,061 


.061 


3.0 


+0.056 


+0.056 


+0.057 


+0.057 


+0.058 


+0.058 


+0.059 


+0.059 


+0.060 


+0.060 


3-5 


.055 


•055 


.056 


.056 


•057 


.057 


.058 


.058 


•059 


•059 


4.0 


.054 


•054 


•055 


•055 


.056 


.056 


•057 


.057 


.057 


.058 


4-5 


•053 


•053 


•054 


•054 


•054 


•055 


•055 


.056 


.056 


.057 


5-0 


.052 


.052 


.052 


•053 


•053 


•054 


•054 


•055 


•055 


.056 


5.5 


+0.051 


+0.051 


+0.051 


+0.052 


+0.052 


+0.053 


+0.053 


+0.053 


+0.054 


+0.054 


6.0 


.049 


.050 


.050 


.051 


.051 


.052 


.052 


.052 


.053 


•053 


6.5 


.048 


.049 


.049 


.050 


.050 


.050 


.051 


.051 


.052 


.052 


7.0 


.047 


.048 


.048 


.048 


.049 


.049 


.050 


.050 


.050 


.051 


7-5 


.046 


.047 


.047 


.047 


.048 


.048 


.048 


.049 


.049 


.050 


8.0 


+0.045 


+0.045 


+0.046 


+0.046 


+0.047 


+0.047 


+0.047 


+0.048 


+0.048 


+0.048 


8.5 


.044 


.044 


.045 


•045 


•045 


.046 


.046 


.047 


.047 


.047 


9.0 


.043 


•043 


.044 


•044 


.044 


.045 


•045 


•045 


.046 


.046 


9-5 


.042 


.042 


.042 


•043 


.043 


.044 


.044 


.044 


•045 


•045 


lO.O 


.041 


.041 


.041 


.042 


.042 


.042 


.043 


.043 


•043 


.044 


10.5 


4-0.040 


+0.040 


+0.040 


+0.041 


+0.041 


+0.041 


+0.042 


+0.042 


+ 0.042 


+0.043 


II. 


•039 


•039 


•039 


■039 


.040 


.040 


.040 


.041 


.041 


.041 


II-5 


•037 


.038 


.03S 


.038 


•039 


•039 


•039 


.040 


.040 


.040 


12.0 


.036 


•037 


.037 


•037 


.038 


.038 


.038 


.038 


•039 


.039 


12.5 


•035 


• 036 


.036 


.036 


.036 


•037 


•037 


.037 


•038 


.038 


13.0 


+0.034 


+0.034 


+0.035 


+0.035 


+0.035 


+0.036 


+0.036 


+0.036 


+ 0.036 


+0.037 


13-5 


•033 


•033 


•034 


•034 


•034 


•034 


.035 


•035 


•035 


.036 


14.0 


.032 


.032 


.032 


•033 


•033 


•033 


•034 


.034 


•034 


.034 


14-5 


.031 


.031 


.031 


.032 


.032 


.032 


.032 


•033 


•033 


•033 


I5-0 


.030 


.030 


.030 


.030 


.031 


.031 


.031 


.031 


.032 


.032 


15.5 


+0.029 


+0.029 


+0.029 


+0.029 


+0.030 


+0.030 


+0.030 


+0.030 


+ 0.031 


+0.031 


16.0 


.028 


.028 


.028 


.028 


.028 


.029 


.029 


.029 


.029 


.030 


16.5 


.026 


.027 


.027 


.027 


.027 


.02S 


.028 


.028 


.028 


.028 


17.0 


.025 


.026 


.026 


.026 


.026 


.026 


.027 


.027 


.027 


.027 


17.5 


.024 


.024 


.025 


.025 


.025 


.025 


.026 


.026 


.026 


.026 


(8.0 


+0.023 


+0.023 


+0.024 


+0.024 


+0.024 


+0.024 


+0.024 


+0.025 


+0.025 


+0.025 


18.5 


.022 


.022 


.022 


.023 


.023 


.023 


.023 


.023 


.024 


.024 


19.0 


.021 


.021 


.021 


.022 


.022 


.022 


.022 


.022 


.022 


.023 


19-5 


.020 


.020 


.020 


.020 


.021 


.021 


.021 


.021 


.021 


.021 


20.0 


.019 


.019 


.019 


.019 


.019 


.020 


.020 


.020 


.020 


.020 


20.5 


-I-0.018 


+0.018 


+0.018 


+0.018 


+ 0.018 


+0.018 


+O.OJ9 


+0,019 


+ 0.019 


+0.019 


21.0 


.017 


.017 


.017 


.017 


.017 


.017 


.017 


.018 


.018 


.018 


21.5 


.016 


.016 


.016 


.016 


.016 


.016 


.016 


.016 


.017 


.017 


i 22.0 


.014 


•oi! 


.015 


.015 


.015 


.015 


.015 


.015 


.015 


.016 


22.5 


.013 


•013 


.014 


.014 


.014 


.014 


.014 


.014 


.014 


.014 


23.0 


-I-0.012 


+0.012 


+0.012 


+0.013 


+0.013 


+0.013 


+0013 


+0.013 


+ 0.013 


+0.013 


^%5 
2470 


.011 


.011 


.Oil 


.Oil 


.012 


.012 


.012 


.012 


.012 


.012 


.010 


.010 


.010 


.010 


.010 


.Oil 


.Oil 


.01 I 


.Oil 


.Oil 


24-5 


.009 


.009 


.009 


.009 


.009 


.009 


.0C9 


.010 


.010 


.010 


25.0 


.ooS 


.008 


.008 


.008 


.008 


.008 


.0(8 


.008 


.008 


.009 



Smithsonian Tables. 



84 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther- 
mometer 
Fahren- 
heit. 






HEIGHT OF 


THE BAROMETER IN INCHES. 








24.0 


24.2 


24.4 


24.6 


24.8 


25.0 


25.2 


25.4 


25.6 


25.8 




F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 




25?5 


-(-0.007 


+0.007 


+0.007 


+0.007 


+0.007 


+0.007 


+0.007 


+0.007 


+0.007 


+0.007 




26.0 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 




26.5 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 




27.0 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 




27-5 


.002 


.002 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 




28.0 


-l-o.ooi 


+0.001 


+0.001 


+0.001 


+0.001 


+0.001 


+0.001 


+0.001 


+ 0.001 


+0.001 




28.5 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 




29.0 


— O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 




29-5 


,002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 




30.0 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 




30.5 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 


—0.004 




31.0 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.006 


.006 




31-5 


.006 


.006 


.006 


.006 


.006 


.007 


.007 


.007 


.007 


.007 




32.0 


.007 


.007 


.007 


.008 


.008 


.008 


.008 


.008 


.008 


.008 




32.5 


.008 


.009 


.009 


.009 


.009 


.009 


.009 


.009 


.009 


.009 




33.0 


-O.OIO 


—O.OIO 


—O.OIO 


—O.OIO 


—O.OIO 


—O.OIO 


—O.OIO 


—O.OIO 


—0.010 


—O.OIO 




33-5 


.oil 


.oil 


.oil 


.Oil 


.oil 


.oil 


.oil 


.oil 


.011 


.oil 




34- 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


.013 




34-5 


.013 


.013 


.013 


.013 


.013 


.013 


.013 


.014 


.014 


.014 




35-0 


.014 


.014 


.014 


.014 


.014 


.014 


.015 


.015 


.015 


.015 




35.5 


-0.015 


-0.015 


—0.015 


—0.015 


—0.015 


—0.016 


—0.016 


—0.016 


—0.016 


—0.016 




36.0 


.016 


.016 


.016 


.016 


.017 


.017 


.017 


.017 


.017 


.017 




36.5 


.017 


.017 


.017 


.018 


.018 


.018 


.018 


.018 


.018 


.018 




37-0 


.018 


.018 


.019 


.019 


.019 


.019 


.019 


.019 


.019 


.019 




37-5 


.019 


.019 


.020 


.020 


.020 


.020 


.020 


.020 


.021 


.021 




38.0 


—0.020 


—0.021 


—0.021 


—0.021 


—0.021 


—0.021 


—0.021 


—0.022 


—0.022 


—0.022 




38.5 


.021 


.022 


.022 


.022 


.022 


.022 


.023 


.023 


.023 


.023 




39.0 


.023 


.023 


.023 


.023 


.023 


.024 


.024 


.024 


.024 


.024 




39-5 


.024 


.024 


.024 


.024 


.024 


.025 


.025 


.025 


.025 


.025 




40.0 


.025 


.025 


.025 


.025 


.026 


.026 


.026 


.026 


.026 


.027 




40.5 


—0.026 


—0.026 


—0.026 


—0.026 


—0.027 


-0.027 


—0.027 


—0.027 


—0.028 


—0.028 




41.0 


.027 


.027 


.027 


.028 


.028 


.028 


.028 


.029 


.029 


.029 




41.5 


.028 


.028 


.028 


.029 


.029 


.029 


.029 


.030 


.030 


.030 




42.0 


.029 


.029 


.030 


.030 


.030 


.030 


.031 


.031 


.031 


.031 




42.5 


.030 


.030 


,031 


.031 


.031 


.031 


.032 


.032 


.032 


.032 




43.0 


-0.031 


—0.032 


-0.032 


-0.032 


-0.032 


-0.033 


-0.033 


-0.033 


-0.033 


-0.034 




43-5 


.032 


•033 


•033 


•033 


•033 


.034 


•034 


.034 


•035 


•035 




44.0 


•033 


•034 


.034 


•034 


•035 


.035 


•035 


.035 


.036 


•036 




44-5 


•035 


•035 


.035 


•035 


.036 


.036 


.036 


.037 


■037 


•037 




45-0 


.036 


.036 


.036 


•037 


.037 


•037 


.037 


.038 


.038 


.038 




45.5 


-0.037 


-0.037 


-0.037 


-0.038 


—0.038 


-0.038 


-0.039 


-0.039 


-0.039 


-0.039 




46.0 


.038 


.038 


.038 


•039 


•039 


•039 


.040 


.040 


.040 


.041 




46.5 


•039 


•039 


.040 


.040 


.040 


.041 


.041 


.041 


.041 


.042 




47.0 


.040 


.040 


.041 


.041 


.041 


.042 


.042 


.042 


•043 


■043 




47-5 


.041 


.041 


.042 


.042 


.042 


•043 


•043 


•043 


.044 


.044 




48.0 


—0.042 


—0.042 


-0.043 


-0.043 


—0.044 - 


-0.044 


—0.044 


-0.045 ■ 


-0.045 


-0.045 




48.5 


.043 


.044 


.044 


.044 


•045 


•045 


•045 


.046 


.046 


.046 




49.0 


.044 


•045 


.045 


.045 


.046 


.046 


.047 


.047 


.047 


.048 




49-5 


.045 


.046 


.046 


.047 


.047 


.047 


.048 


.048 


.048 


.049 




50.0 


.046 


.047 


.047 


.048 


.048 


.048 


.049 


.049 


.050 


.050 





Smithsonian Tables. 



ss 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 
Ther- 






HEIGHT OF 


TH1<: HAROMIiTKR IN INCHp;.S. 






irinmpf pr 






















MIUlllClCl 

Fahren- 
heit. 


24.0 


24.2 


24.4 


24.6 


24.8 


25.0 


25.2 


1 25.4 


25.6 


25.8 


F. 


Inch. 


Inch. 


luch. 


luch. 


luch. 


luch. 


luch. 


luch. 


luch. 


Inch. 


50?5 


—0.048 


—0.048 


—0.048 


-0.049 


—0.049 


-0.050 


-0. 05c 


-0.050 


-0.051 


-0.051 


51.0 


.049 


.049 


•049 


.050 


.050 


.051 


.051 


.051 


.052 


.052 


51-5 


.050 


.050 


.051 


.051 


.051 


.052 


.052 


■053 


■053 


•053 


52.0 


.051 


.051 


.052 


.052 


•053 


•053 


•053 


•054 


•054 


•055 


52.5 


.052 


.052 


•053 


•053 


•054 


•054 


•055 


•055 


•055 


.056 


53.0 


-0.053 


-0.053 


-0.054 


-0.054 


-0.055 


-0.055 


-0.056 


-0.056 


-0.057 


-0.057 


53-5 


•054 


•055 


•055 


.055 


.056 


.056 


•057 


•057 


.058 


.058 


540 


•055 


.056 


.056 


•057 


•057 


•057 


.058 


.058 


•059 


•059 


54-5 


.056 


•057 


•057 


.058 


.058 


•059 


■059 


.060 


.060 


.060 


: 55-0 


•057 


.058 


.058 


•059 


•059 


.060 


.060 


.061 


.061 


.062 


55.5 


-0.058 


-0.059 


-0.059 


—0.060 


—0.060 


—0.061 


— 0.061 


— 0.062 


—0.062 


-0.063 


56.0 


.060 


.060 


.060 


.061 


.061 


.062 


.062 


.063 


.063 


.064 


56.5 


.061 


.061 


.062 


.062 


.063 


•063 


.064 


.064 


.065 


.065 


57-0 


.062 


.062 


•063 


.063 


.064 


.064 


•065 


•065 


.066 


.066 


57-5 


.063 


.063 


.064 


.064 


.065 


.065 


.066 


.066 


.067 


.067 


58.0 


— n.064 


—0.064 


-0.065 


-0.065 


—0.066 


—0.066 


— 0.067 


-0.068 


—0.068 


—0.069 


5«.5 


.065 


.065 


.066 


.067 


.067 


.068 


.068 


.069 


.069 


.070 


59-0 


.066 


.067 


.067 


.068 


.068 


.069 


.069 


.070 


.070 


.071 


59-5 


.067 


.068 


.068 


.069 


.069 


.070 


.070 


.071 


.072 


.072 


60.0 


.068 


.069 


.069 


.070 


.070 


.071 


.072 


.072 


•073 


•073 


60.5 


— 0.069 


—0.070 


-0.070 


—0.071 


—0.072 


—0.072 


-0.073 


-0.073 


-0.074 


-0.074 


61.0 


.070 


.071 


.072 


.072 


•073 


•073 


•074 


.074 


•075 


.076 


61.5 


.071 


.072 


•073 


•073 


.074 


■074 


•075 


.076 


.076 


.077 


I 62.0 


•073 


■073 


.074 


.074 


•075 


.076 


.076 


•077 


.077 


.078 


62.5 


-074 


.074 


•075 


•075 


.076 


.077 


•077 


.078 


.078 


.079 


63.0 


-0.075 


-0.075 


—0.076 


-0.077 


-0.077 


—0.078 


—0.078 


-0.079 


-0.080 


— 0.080 


63.5 


.076 


.076 


.077 


.078 


.078 


.079 


.080 


.080 


.081 


.081 


! 64.0 


.077 


.077 


.078 


.079 


■079 


.080 


.081 


.081 


.0S2 


.082 


64.5 


.078 


•079 


•079 


.080 


.081 


.081 


.082 


.082 


.083 


.084 


; 65.0 


.079 


.080 


.080 


.oSi 


.082 


.082 


.083 


.084 


.084 


.085 


65.5 


— 0.080 


—0.081 


—0.081 


—0.082 


-0.083 


-0.083 


—0.084 


-0.085 


-0.085 


-0.086 


66.0 


.081 


.082 


.083 


.083 


.084 


.085 


.085 


.ob6 


.087 


.087 


66.5 


.082 


.083 


.084 


.084 


.085 


.086 


.086 


.087 


.08S 


.088 


67.0 


.083 


.084 


.085 


.085 


.086 


.087 


.087 


.088 


.089 


.090 


67-5 


.084 


.085 


.086 


.0S7 


.087 


.088 


.089 


.089 


.090 


.091 


68.0 


-0.085 


-0.086 


—0.087 


-0.088 


-0.088 


— 0.089 


—0.090 


—0.090 


— 0.091 ; 


—0.092 


i 68.5 


.087 


.087 


.088 


.089 


.089 


.090 


.091 


.092 


.092 


•093 


i 69.0 


.088 


.088 


.089 


.090 


.091 


.091 


.092 


•093 


•093 


.094 


1 69.5 


.089 


.089 


.090 


.091 


.092 


.092 


■093 


.094 


■095 ! 


•095 


70.0 


.090 


.091 


.091 


.092 


•093 


.094 


.094 


• 095 


.096 ; 


.097 


70.5 


— 0.091 


—0.092 


—0.092 


-0.093 


—0.094 


-0.095 


-0.095 


—0.096 


-0.097 


— 0.098 


1 7I-0 


.092 


■093 


.094 


.094 


•095 


.096 


.097 


-097 


.098 


.099 


71-5 


•093 


.094 


•095 


•095 


.096 


.097 


.098 


.098 


.0991 


.100 


72.0 


.094 


•095 


.096 


.096 


.097 


.098 


.099 


. 100 


.100 I 


.101 


72.5 


■095 


.096 


.097 


.098 


.098 


.099 


.100 


.lor 


.102 


.102 


73.0 


— 0.096 


-0.097 


—0.098 


—0.099 


— 0. 100 


— 0. 100 


— 0. lOI 


—0.102 


-0. 103 


-0.104 


73-5 


.097 


.098 


•099 


.100 


.101 


.101 


.102 


.103 


.104 


.105 


1 74.0 


.098 


.099 


.100 


.101 


.102 


.103 


.103 


.104 


.105 


.106 


i 74-5 


.100 


.100 


.101 


.102 


.103 


.104 


.105 


.105 


.106 


.107 


75-0 


.101 


.101 


.102 


.103 


.104 


.105 


.106 


.106 


.107 


.108 



Smithsonian Tables. 



86 



Table 44. 

REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther- 
mometer 






HEIGHT OF THE BAROMETER IN INCHES. 


























Fahren- 
heit. 


24.0 


24.2 


24.4 


24.6 


24.8 


25.0 


25.2 


25.4 


25.6 


25.8 


F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


75?5 


— 0. 102 


-0. 103 


-0.103 


—0.104 


-0. 105 


— 0. 106 


— 0.107 


— 0. 108 


— 0. 108 


—0.109 


76.0 


.103 


.104 


.104 


.105 


.106 


.107 


.108 


.109 


.110 


.110 


76.5 


.104 


.105 


.106 


.106 


.107 


.108 


.109 


.110 


.III 


.112 


77.0 


.105 


.106 


.107 


.108 


.108 


.109 


.110 


.III 


.112 


.113 


77-5 


.106 


.107 


.108 


.109 


.110 


.110 


.III 


.112 


■113 


.114 


78.0 


— 0. 107 


— 0. 108 


— 0.109 


—O.I 10 


— 0. 1 1 1 


—O.I 12 


— O.I 12 


-O.I 13 


—O.I 14 


-O.I 15 


7H.5 


. 108 


.109 


.110 


.III 


.112 


■113 


.114 


.114 


■ 115 


.116 


79.0 


.109 


.110 


.III 


.112 


•113 


.114 


.115 


.116 


.117 


.117 


79-5 


. no 


.III 


.112 


•113 


.114 


■115 


.116 


.117 


.118 


.119 


80.0 


.III 


.112 


•113 


.114 


•115 


.116 


.117 


.118 


.119 


.120 


80.5 


—0.1 12 


-O.I 13 


—O.I 14 


-O.I 15 


— O.I 16 


—O.I 17 


-O.I 18 


— O.II9 


—0.120 


— 0. 121 


81.0 


.114 


■115 


."5 


.116 


.117 


.118 


.119 


.120 


.121 


.122 


81.5 


■115 


.116 


.117 


.118 


.118 


.119 


.120 


.121 


.122 


.123 


82.0 


.116 


.117 


.118 


.119 


.120 


.121 


.122 


.122 


.123 


.124 


82.5 


.117 


.118 


.119 


.120 


.121 


.122 


.123 


.124 


.125 


.126 


83.0 


-0.1 18 


—O.I 19 


—0.120 


— 0. 121 


—0.122 


-0.123 


—0.124 


—0.125 


— 0.126 


—0.127 


83.5 


.119 


.120 


.121 


.122 


.123 


.124 


.125 


.126 


.127 


.128 


84.0 


.120 


.121 


.122 


.123 


.124 


•125 


.126 


.127 


.128 


.129 


84.5 


.121 


. 122 


.123 


.124 


.125 


.126 


.127 


.128 


.129 


.130 


85.0 


.122 


■123 


.124 


.125 


.126 


.127 


.128 


.129 


.130 


•131 


85.5 


-0.123 


— 0. I 24 


-0.125 


—0.126 


—0.127 


-0.128 


— 0. 129 


-0.130 


-O.I3I 


-0.133 


86.0 


.124 


•125 


.126 


.127 


.128 


.130 


■131 


.132 


.133 


.134 


86.5 


■125 


.126 


.128 


.129 


.130 


•131 


.132 


•133 


■134 


■135 


87.0 


.126 


.128 


.129 


.130 


.^31 


.132 


.133 


•134 


•135 


.136 


87.5 


.128 


. 129 


.130 


•131 


.132 


•133 


.134 


•135 


.136 


•137 


88.0 


— 0. 1 29 


-0. 130 


-0.131 


-0.132 


-0.133 


-0.134 


-0.135 


-0.136 


-0.137 


-0.138 


88.5 


.130 


•131 


.132 


.133 


• 134 


•135 


.136 


•137 


.138 


•139 


89.0 


• 131 


.132 


•133 


.134 


•135 


•136 


•137 


.138 


.140 


.141 


89.5 


.132 


•133 


.134 


.135 


.136 


•137 


•138 


.140 


.141 


.142 


90.0 


• 133 


.134 


•135 


.136 


•137 


.138 


.140 


.141 


.142 


•143 


90.5 


-0.134 


-0.135 


-0.136 


-0.137 


-01.39 


— 0. 140 


— 0. 141 


—0.142 


-0.143 


-0.144 


91.0 


• 135 


.136 


•137 


.138 


.140 


.141 


.142 


•143 


.144 


•145 


91-5 


.136 


•137 


• 138 


.140 


.141 


.142 


.143 


.144 


.145 


.146 


92.0 


• 137 


.138 


.140 


.141 


.142 


•143 


.144 


.145 


.146 


.148 


92.5 


.138 


■139 


.141 


.142 


• 143 


.144 


•145 


.146 


.148 


.149 


93.0 


-0.139 


-0. 141 


—0.142 


-0. 143 


-0.144 


-0.145 


—0.146 


—O.I 48 


-0.149 


-0.150 


93^5 


.140 


.142 


• 143 


.144 


• 145 


.146 


.148 


.149 


.150 


•151 


94.0 


.142 


.143 


.144 


•145 


.146 


.147 


.149 


.150 


•151 


-152 


94^5 


.143 


.144 


.145 


.146 


.147 


.149 


.150 


.151 


•152 


■153 


95^o 


.144 


•145 


.146 


.147 


.149 


.150 


•151 


.152 


.153 


•154 


95.5 


-0.145 


— 0. 146 


-0.147 


— 0. 148 


-0.150 


-O.I5I 


-0.152 


-0.153 


-0.154 


-0.156 


96.0 


.146 


.147 


.148 


.150 


•151 


.152 


•153 


■154 


.156 


•157 


96.5 


.147 


.148 


.149 


■151 


.152 


■153 


.154 


.156 


.157 


.158 


97.0 


.148 


.149 


.150 


.152 


.153 


.154 


•155 


.157 


.158 


•159 


97-5 


.149 


.150 


•152 


.153 


• 154 


•155 


-157 


•158 


•159 


.160 


98.0 


-0.150 


-O.I5I 


-0.153 


-0.154 


-0.155 


-0.156 


-0.158 


-0.159 


—0.160 


— 0. 161 


98.5 


.151 


•153 


.154 


.155 


.156 


.158 


■159 


.160 


.161 


.163 


99.0 


.152 


•154 


.155 


.156 


.157 


■159 


.160 


.161 


.162 


.164 


99^5 


.153 


.155 


.156 


•157 


•159 


.160 


.161 


.162 


.164 


.165 


100. 

1 


.154 


.156 

i 


■ 157 


.158 


.160 


.161 


.162 


.163 


.165 


.166 



Smithsonian Tables. 



87 



Table 44. 

REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther- 
mometer 
Fahren- 
heit. 


HEIGHT OF THE BAROMETER IN INCHES. 


26.0 


26.2 


26.4 


26.6 


26.8 


27.0 


27.2 


27.4 


27.6 


27.8 


F. 


Inch. 


Inch. 


luch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


0?0 


-fO.068 


+0.068 


+0.069 


+0.069 


+0.070 


+0.070 


+0.071 


+0.071 


+0.072 


+0.072 


+0.5 


-I-O.067 


+0.067 


+0.068 


+0.068 


+0.069 


+0.069 


+0.070 


+ 0.070 


+0.071 


+0.071 


I.O 


.065 


.066 


.066 


.067 


.067 


.068 


.068 


.069 


.069 


.070 


1-5 


.064 


.065 


.065 


.066 


.066 


.067 


.067 


.068 


.068 


.069 


2.0 


.063 


.064 


.064 


• 065 


•065 


•065 


.066 


.066 


.067 


.067 


2-5 


.062 


.062 


.063 


.063 


.064 


.064 


.065 


.065 


.066 


.066 


3.0 


-|-o.o5i 


+0.061 


+0.062 


+0.062 


+0.063 


+0.063 


+0.063 


+0.064 


+0.064 


+0.065 


3-5 


•059 


.060 


.060 


.061 


.061 


.062 


.062 


.063 


.063 


.064 


4.0 


.058 


•059 


•059 


.060 


.060 


.061 


.061 


.061 


.062 


.062 


4-5 


•057 


.058 


.058 


.058 


•059 


•059 


.060 


.060 


.061 


.061 


5-0 


.056 


.056 


•057 


.057 


.058 


.058 


•059 


•059 


.059 


.060 


5.5 


+0.055 


+ 0.055 


+0.056 


+0.056 


+0.056 


+0.057 


+0.057 


+O.05S 


+0.058 


+0.059 


6.0 


•054 


.054 


•054 


•055 


.055 


.056 


.056 


.056 


•057 


.057 


6.5 


.052 


•053 


•053 


•054 


•054 


.054 


.055 


•055 


.056 


.056 


7.0 


.051 


.052 


.052 


.052 


•053 


.053 


•054 


■054 


•054 


•055 


7-5 


.050 


.050 


.051 


.051 


.052 


.052 


.052 


.053 


.053 


•053 


8.0 


+0.049 


+0.049 


+0.050 


+0.050 


+0.050 


+0.051 


+0.051 


+0.051 


+0.052 


+0.052 


8.5 


.048 


.048 


.048 


.049 


•049 


.049 


.050 


.050 


.051 


.051 


9.0 


.046 


.047 


.047 


.048 


.048 


.048 


.049 


.049 


•049 


.050 


9-5 


.045 


.046 


.046 


.046 


.047 


.047 


.047 


.048 


.048 


.048 


lO.O 


.044 


.044 


•045 


.045 


•045 


.046 


.046 


.046 


.047 


•047 


10.5 


+0.043 


+0.043 


+0.044 


+0.044 


+0.044 


+0.045 


+0.045 


+0.045 


+0.046 


+0.046 


II. 


.042 


.042 


.042 


.043 


.043 


•043 


•044 


.044 


.044 


•045 


II-5 


.041 


.041 


.041 


.041 


.042 


.042 


.042 


•043 


•043 


•043 


12.0 


•039 


.040 


.040 


.040 


.041 


.041 


.041 


.041 


.042 


.042 


12.5 


.038 


.038 


•039 


.039 


•039 


.040 


.040 


.040 


.040 


.041 


13.0 


+0.037 


+0.037 


fo.038 


+0.038 


+0.038 


+0.038 


+0.039 


+0.039 


+0.039 


+0.040 


13-5 


.036 


.036 


.036 


•037 


•037 


.037 


•037 


.038 


.038 


.038 


14.0 


.035 


.035 


•035 


•035 


.036 


.036 


■ 036 


•036 


.037 


.037 


14-5 


•033 


.034 


•034 


•034 


.034 


.035 


•035 


.035 


•035 


.036 


15-0 


.032 


.032 


.033 


.033 


•033 


•033 


•034 


.034 


.034 


•034 


15.5 


+0.031 


+0.031 


+0.032 


+0.032 


+0.032 


+0.032 


+0.032 


+0.033 


+0.033 


+0.033 


16.0 


.030 


.030 


.030 


.031 


.031 


.031 


.031 


.031 


.032 


.032 


16.5 


.029 


.029 


.029 


.029 


.030 


.030 


.030 


.030 


.030 


.031 


17.0 


.027 


.028 


.028 


.028 


.028 


.029 


.029 


.029 


.029 


.029 


17-5 


.026 


.027 


.027 


.027 


.027 


.027 


.028 


.028 


.028 


.028 


18.0 


fo.025 


+0.025 


+0.026 


+0.026 


+0.026 


+0.026 


+0.026 


+0.026 


+0.027 


+ 0.027 


18.5 


.024 


.024 


.024 


.024 


.025 


• 025 


.025 


■025 


.025 


.026 


19.0 


•023 


.023 


.023 


.023 


.023 


.024 


.024 


.024 


.024 


.024 


19-5 


.022 


.022 


.022 


.022 


.022 


.022 


.023 


.023 


.023 


.023 


20.0 


.020 


.021 


.021 


.021 


.021 


.021 


.021 


.021 


.022 


.022 


20.5 


+-0.019 


+0.019 


+0.020 


+0.020 


+0.020 


+0.020 


+0.020 


+0.020 


+0.020 


+0.021 


21.0 


.oiS 


.018 


.018 


.018 


.019 


.019 


.019 


.019 


.019 


.019 


21.5 


.017 


.017 


.017 


.017 


.017 


.017 


.018 


.018 


.018 


.018 


22.0 


.016 


.016 


.016 


.016 


.016 


.016 


.016 


.017 


.017 


.017 


22.5 


.014 


.015 


.015 


.015 


.015 


.015 


.015 


.015 


.015 


.015 


23.0 


fo.013 


+0.013 


+0.014 


+0.014 


+ 0.014 


+0.014 


+0.014 


+0.014 


+0.014 


+ 0.014 


23-5 


.012 


.012 


.012 


.012 


.012 


.013 


.013 


.013 


.013 


.013 


24.0 


.011 


.Oil 


.Oil 


.Oil 


.Oil 


.Oil 


.Oil 


.012 


.012 


.012 


24-5 


.010 


.010 


.010 


.010 


.010 


.010 


.010 


.010 


.010 


.110 


25.0 


.009 


.009 


.009 


.009 


.009 


.009 


.009 


.009 


.009 


.009 



Smithsonian Table*. 



88 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 
Ther- 






HEIGHT OF 


THE BAROMETER IN INCHES. 








mometer 
Fahren- 
heit. 
























26.0 


26.2 


26.4 


26.6 


26.8 


27.0 


27.2 


27.4 


27.6 


27.8 




''• 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 




25?5 


-f-0.007 


+0.007 


+0.008 


+0.008 


+0.008 


+0.008 


+0.008 


+0.008 


+0.008 


+0.008 




26.0 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.007 


.007 


.007 




26.5 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 


.005 




27.0 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 




27-5 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 




280 


-fo.ooi 


+0.001 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 




28.5 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 




29.0 


— O.OOI 


— O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 




29-5 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 


.002 




30.0 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 




30.5 


-0.004 


—0.004 


—0.004 


-0005 


-0.005 


—0.005 


-0.005 


-0.005 


—0.005 


-0.005 




31.0 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 




31-5 


.007 


.007 


.007 


.007 


.007 


.007 


.007 


.007 


.007 


.007 




32.0 


.008 


.008 


.008 


.008 


.008 


.008 


.008 


.008 


.008 


.009 




32.5 


.009 


.009 


.009 


.009 


.009 


.009 


,010 


.010 


.010 


.010 




33.0 


— O.OIO 


—O.OIO 


—O.OIO 


— O.OII 


—O.OII 


—O.OII 


—O.OII 


—O.OII 


—O.OII 


—O.OII 




33-5 


.oil 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


.012 




34-0 


.013 


.013 


.013 


.013 


.013 


.013 


.013 


.013 


■013 


.014 




34-5 


.014 


.014 


.014 


.014 


.014 


.014 


.014 


.015 


■015 


.015 




35-0 


.015 


.015 


.015 


.015 


.015 


.016 


.016 


.016 


.016 


.016 




35.5 


—0.016 


—0.016 


—0.016 


—0.017 


—0.017 


—0.017 


—0.017 


—0.017 


—0.017 


—0.017 




36.0 


.017 


.018 


.018 


.018 


.018 


.018 


,018 


.018 


.018 


.019 




36.5 


.019 


.019 


.019 


.019 


.019 


.019 


.019 


.020 


.020 


.020 




37.0 


.020 


.020 


.020 


.020 


.020 


.021 


.021 


.021 


.021 


.021 




37-5 


.021 


.021 


.021 


.021 


.022 


.022 


.022 


.022 


.022 


.022 




38.0 


—0.022 


—0.022 


—0.022 


-0.023 


-0.023 


-0.023 


-0.023 


-0.023 


-0.023 


—0.024 




38.5 


.023 


.023 


.024 


.024 


.024 


.024 


.024 


•025 


.025 


.025 




39-0 


.024 


.025 


.025 


.025 


.025 


.025 


.026 


.026 


.026 


.026 




39-5 


.026 


.026 


.026 


.026 


.026 


.027 


.027 


.027 


.027 


.027 




40.0 


.027 


.027 


.027 


.027 


.028 


.028 


.028 


.028 


.028 


.029 




40.5 


-.5.028 


—0.028 


—0.028 


—0.029 


—0.029 


—0.029 


—0.029 


-0.030 


-0.030 


-0.030 




41.0 


.029 


.029 


.030 


•030 


.030 


.030 


.031 


.031 


.031 


.031 




41-5 


.030 


.031 


.031 


.031 


.031 


.032 


.032 


.032 


.032 


.032 




42.0 


.032 


.032 


.032 


.032 


•033 


•033 


•033 


.033 


•033 


•034 




42.5 


•033 


•033 


•033 


•033 


•034 


•034 


•034 


•034 


.035 


•035 




43.0 


-0.034 


-0.034 


-0.034 


-0.035 


-0.035 


-0.035 


-0.035 


-0.036 


-0.036 


-0.036 




43-5 


.035 


•035 


.036 


.036 


.036 


.036 


•037 


•037 


•037 


.037 




44.0 


.036 


.037 


•037 


•037 


•037 


.038 


.038 


.038 


.038 


•039 




44-5 


•037 


.038 


.038 


.038 


039 


•039 


•039 


•039 


.040 


.040 




45-0 


•039 


•039 


•039 


•039 


.040 


.040 


.040 


.041 


.041 


.041 




45.5 


—0.040 


—0.040 


—0.040 


—0.041 


—0.041 


-0.041 


—0.042 


—0.042 


—0.042 


-0.043 




* 46.0 


.041 


.041 


.042 


.042 


.042 


•043 


■043 


•043 


•043 


.044 




46.5 


.042 


.042 


•043 


•043 


•043 


.044 


.044 


.044 


•045 


•045 




47.0 


•043 


.044 


.044 


.044 


•045 


•045 


■045 


.046 


.046 


.046 




47-5 


•045 


•045 


•045 


.046 


.046 


.046 


.047 


•047 


.047 


.048 




48.0 


— a.046 


—0.046 


—0.046 


-0.047 


-0.047 


-0.047 


—0.048 


—0.048 


—0.048 


—0.049 




48.5 


.047 


.047 


.048 


.048 


.048 


.049 


.049 


.049 


.050 


.050 




49.0 


.048 


.048 


.049 


.049 


.049 


.050 


.050 


.051 


•051 


.051 




49-5 


.049 


.050 


.050 


.050 


.051 


.051 


.051 


.052 


.052 


•053 




50.0 


.050 


.051 


.051 


.052 


.052 


.052 


•053 


•053 


.053 


•054 





Smithsonian Iables. 



89 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 
Ther- 






HEIGHT OF THE BAROMETER IN INCHES. 






mometer 
Fahren- 
heit. 






















26.0 


26.2 


26.4 


26.6 


26.8 


27.0 


27.2 


27.4 


27.6 


27.8 


F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


50?5 


-0.052 


-0.052 


-0.052 


-0.053 


-0.053 


-0.054 


-0.054 


-0.054 


-0.055 


-0.055 


51.0 


.053 


•053 


•054 


•054 


•054 


•055 


•055 


.056 


.056 


.056 


51-5 


•054 


•054 


•055 


•055 


.056 


.056 


.056 


.057 


•057 


.058 


52.0 


•055 


.055 


.056 


.056 


•057 


•057 


.058 


.058 


.058 


•059 


52.5 


.056 


•057 


•057 


.058 


.058 


.058 


•059 


•059 


.060 


.060 


53.0 


-0.057 


-0.058 


-0.058 


-0.059 


-0.059 


—0.060 


—0.060 


—0.061 


—0.061 


—0.061 


53-5 


.059 


•059 


•059 


.060 


.060 


.061 


.061 


.062 


.062 


.063 


54-0 


.060 


.060 


.061 


.061 


.062 


.062 


.063 


.063 


.063 


.064 


54-5 


.061 


.061 


.062 


.062 


.063 


■063 


.064 


.064 


• 065 


•065 


55-0 


.062 


.063 


.063 


.064 


.064 


.064 


.065 


.065 


.066 


.066 


55.5 


-0.063 


—0.064 


—0.064 


-0.065 


—0.06 s 


—0.066 


—0. 066 


- 0.067 


—0.067 


—0.068 


56.0 


.064 


.065 


.065 


.066 


.066 


.067 


.067 


.068 


.068 


.069 


56.5 


.066 


.066 


.067 


.067 


.068 


.068 


.069 


.069 


.070 


.070 


57-0 


.067 


.067 


.068 


.068 


.069 


.069 


.070 


.070 


.071 


.071 


57-5 


.068 


.069 


.069 


.070 


.070 


.071 


.071 


.072 


.072 


•073 


58.0 


-0.069 


—0.070 


—0.070 


—0.071 


—0.071 


—0.072 


—0.072 


-0.073 


-0.073 


-0.074 


58.5 


.070 


.071 


.071 


.072 


.072 


.073 


.074 


.074 


•075 


•075 


59-0 


.072 


.072 


.073 


.073 


.074 


.074 


•075 


•075 


.076 


.076 


59-5 


•073 


•073 


.074 


.074 


•075 


■075 


.076 


.077 


.077 


.078 


60.0 


.074 


.074 


.075 


.076 


.076 


.077 


.077 


.078 


.078 


.079 


60.5 


-0.075 


—0.076 


—0.076 


-0.077 


-0.077 


—0.078 


—0.078 


-0.079 


—0.080 


— 0.080 


61.0 


.076 


.077 


.0:7 


.078 


.079 


.079 


.080 


.080 


.oSi 


.081 


61.5 


.077 


.078 


.079 


.079 


.oSo 


.oSo 


.oSi 


.082 


.082 


•083 


62.0 


.079 


.079 


.080 


.080 


.081 


.082 


.082 


.083 


.083 


.084 


62.5 


.oSo 


.080 


.081 


.082 


.082 


.083 


.083 


.084 


.0S5 


.085 


63.0 


—0.081 


—0.082 


—0.082 


-0.083 


-0.083 


—0.084 


-0.085 


-0.085 


-0.086 


—0.086 


63.5 


.082 


.083 


■083 


.084 


.085 


• 085 


.086 


.086 


.087 


.088 


64.0 


.083 


.084 


.085 


.085 


.086 


.086 


.087 


.0S8 


.088 


.089 


64-5 


.084 


.0S5 


.086 


.086 


.087 


.088 


.088 


.089 


.090 


.090 


65.0 


.086 


.086 


.087 


.088 


.088 


.089 


.090 


.090 


.091 


.092 


65.5 


—0.087 


—0.087 


0.088 


—0.089 


—0.089 


—0.090 


—0.091 


—0.091 


—0.092 


-0.093 


66.0 


.088 


.089 


.089 


.090 


.091 


.091 


.092 


•093 


•093 


.094 


66.5 


.089 


.090 


.090 


.091 


.092 


•093 


•093 


•094 


•095 


•095 


67.0 


.090 


.091 


.092 


.092 


•093 


.094 


.094 


•095 


.096 


.097 


67-5 


.092 


.092 


•093 


.094 


•094 


•095 


.096 


.096 


.097 


.098 


68.0 


-0.093 


-0.093 


—0.094 


-0.095 


-0.095 


—0.096 


-0.097 


—0.098 


—0.098 


—0.099 


68.5 


.094 


■095 


•095 


.096 


•097 


.097 


.098 


.099 


.100 


.100 


69.0 


•095 


.096 


.096 


.097 


.098 


.099 


.099 


.100 


.101 


.102 


69-5 


.096 


.097 


.098 


.098 


.099 


.100 


.101 


.101 


.102 


.103 


70.0 


.097 


.098 


.099 


.100 


.100 


.101 


.102 


.103 


.103 


.104 


70.5 


—0.098 


—0.099 


—O.I 00 


— 0. lOI 


— 0. lOI 


—0.102 


-0.103 


— 0. 104 


—0.105 


-0. 105 


71.0 


.100 


.100 


.101 


.102 


.103 


.103 


.104 


.105 


.106 


.107 


71-5 


.101 


.102 


.102 


.103 


.104 


.105 


.105 


.106 


.107 


.108 


72.0 


.102 


.103 


.104 


.104 


.105 


.106 


.107 


.107 


.loS 


.109 


72.5 


.103 


.104 


.105 


.106 


.106 


.107 


.loS 


.109 


.109 


.110 


73.0 


—0. 104 


-0. 105 


— 0. 106 


— 0. 107 


— 0. loS 


— 0. loS 


— 0. 109 


—O.I 10 


— O.III 


— O.II2 


73-5 


.105 


.106 


.107 


.108 


.109 


.110 


.110 


.III 


.112 


•113 


74.0 


.107 


.107 


.108 


.109 


.110 


.III 


.112 


.112 


•113 


.114 


74-5 


.108 


.109 


.109 


.110 


.III 


.112 


•113 


.114 


114 


•115 


75.0 


.109 


.110 


.III 


.112 


.112 


•113 


.114 


.115 


T16 


.117 



Smithsonian Tasles. 



90 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther- 
mometer 
Fahren- 
heit. 


HEIGHT OF THE BAROMETER IN INCHES. 


26.0 


26.2 


26.4 


26.6 


26.8 


27.0 


27.2 


27.4 


27.6 


27.8 


F. 


Inch. 


Inch. 


Inch. Inch. | 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


75?5 


— O.IIO 


—O.I II 


—O.I 12 


-0.1 13 


—O.I 14 


—O.I 14 


-0.II5 


—O.I 16 


—O.I 17 


— O.IlS 


76.0 


.III 


.112 


•113 


.114 


•115 


.116 


.116 


.117 


.118 


.119 


76.5 


•113 


•113 


.114 


■ 115 


.116 


.117 


.118 


.119 


.119 


.120 


77.0 


.114 


.115 


.115 


.116 


.117 


.118 


.119 


.120 


.121 


.122 


77-5 


.115 


.116 


.117 


.117 


.118 


.119 


.120 


.121 


.122 


.123 


78.0 


—O.I 16 


—O.I 17 


-O.I 18 


— 0.119 


—0.120 


—0.120 


— O.I2I 


—0.122 


-0.123 


—0.124 


78.5 


.117 


.118 


.119 


.120 


.121 


.122 


.123 


.123 


.124 


.125 


79.0 


.118 


.119 


.120 


.121 


.122 


.123 


.124 


•125 


.126 


.127 


79-5 


.120 


.120 


.121 


.122 


.123 


.124 


•125 


.126 


.127 


.128 


80.0 


.121 


.122 


.123 


.123 


.124 


•125 


.126 


.127 


.I2S 


.129 


80.5 


—0.122 


-0.123 


—0.124 


—0.125 


—0.126 


— 0.127 


—0.127 


-0.128 


—0.129 


-0.130 


81.0 


.123 


.124 


.125 


.126 


.127 


.128 


.129 


.130 


•131 


•132 


81.5 


.124 


.125 


.126 


.127 


.I2S 


.129 


.130 


•131 


.132 


•133 


82.0 


.125 


.126 


.127 


.128 


.129 


.130 


•131 


.132 


■133 


•134 


82.5 


.127 


.I2S 


.128 


.129 


.130 


•131 


.132 


•133 


.134 


•135 


83.0 


-O.I 28 


—0.129 


-0.130 


-0.131 


—0.132 


-0.133 


-0.134 


-0.135 


-0.136 


-0.137 


83.5 


.129 


.130 


•131 


.132 


■^33 


•134 


•135 


.136 


•137 


.138 


84.0 


.130 


•131 


.132 


•133 


•134 


•135 


.136 


•137 


.138 


.139 


84-5 


•131 


.132 


•133 


•134 


•135 


.136 


•137 


.138 


•139 


.140 


85.0 


.132 


•133 


.134 


•135 


.136 


•137 


.138 


•139 


.141 


.142 


85.5 


-0. 134 


-0.135 


-0.136 


-0.137 


-0.138 


-0.139 


— 0. 140 


—0.14 1 


—0.142 


-0. 143 


86.0 


•135 


.136 


.137 


.138 


•139 


.140 


.141 


.142 


.143 


.144 


86.5 


.136 


•137 


.138 


•139 


.140 


.141 


.142 


.143 


.144 


•145 


87.0 


•137 


.138 


•139 


.140 


.141 


.142 


.143 


.144 


.145 


.147 


87.5 


.138 


•139 


.140 


.141 


.142 


.144 


.145 


.146 


.147 


.148 


88.0 


-0.139 


— 0. 140 


—0.142 


-0.143 


-0.144 


-0.145 


— 0. 146 


-0.147 


— O.I4S 


-0.149 


88. 5 


.141 


.142 


■143 


.144 


.145 


.146 


.147 


.148 


.149 


.150 


89.0 


.142 


•143 


.144 


.145 


.146 


.147 


.148 


.149 


.150 


.152 


89-5 


•143 


.144 


•145 


.146 


.147 


.I4S 


.149 


.151 


.152 


•153 


90.0 


.144 


.145 


.146 


.147 


.148 


.150 


•151 


.152 


•153 


•154 


90.5 


-0.145 


— 0. 146 


-0.147 


-0.149 


-0.150 


-O.I5I 


-0.152 


-0.153 


-0.154 


-0.155 


91.0 


.146 


.147 


.149 


.150 


• 151 


.152 


.153 


•154 


•155 


•157 


91-5 


.148 


.149 


.150 


• 151 


.152 


•153 


•154 


.155 


•157 


.158 


92.0 


.149 


.150 


•151 


.152 


•153 


.154 


.156 


.157 


.158 


•159 


92.5 


.150 


.151 


.152 


•153 


.154 


.156 


•157 


.158 


•159 


.160 


93.0 


-O.I5I 


-0.152 


-0.153 


-0.155 


-0.156 


-0.157 


-0.158 


-0.159 


—0.160 


— O.161 


93-5 


•152 


•153 


.155 


.156 


•157 


.158 


•159 


.160 


.162 


.163 


94.0 


•153 


•155 


.156 


.157 


.158 


•159 


.160 


.162 


.163 


.164 


94-5 


.155 


.156 


•157 


.158 


•159 


.160 


.162 


.163 


.164 


.165 


95-0 


.156 


•157 


.158 


.159 


.160 


.162 


.163 


.164 


.165 


.166 


95.5 


-0.157 


-0.158 


-0.159 


—0.160 


—0.162 


-0.163 


—0.164 


-0.165 


-0.167 


-0.168 


96.0 


.158 


•159 


.160 


.162 


.163 


.164 


.165 


.167 


.168 


.169 


96.5 


•159 


.160 


.162 


.163 


.164 


.165 


.167 


.168 


.169 


.170 


97.0 


.160 


.162 


.163 


.164 


.165 


.167 


.16S 


.169 


.170 


.171 


97-5 


.162 


.163 


.164 


.165 


.166 


.168 


.169 


.170 


.171 


.173 


98.0 


-0.163 


—0. 164 


-0.165 


—0.166 


—0.168 


—0.169 


—0.170 


— O.I7I 


-0.173 


-0.174 


98.5 


.164 


.165 


.166 


.168 


.169 


.170 


.171 


.173 


.174 


•175 


99.0 


.165 


.166 


.168 


.169 


.170 


.171 


•173 


.174 


.175 


.176 


99-5 


.166 


.167 


.169 


.170 


.171 


•173 


■174 


•175 


.176 


.178 


lOO.O 


.167 


.169 


.170 


.171 


.172 


.174 


•175 


.176 


.178 


.179 


Bmithsonia 


>i Tables. 










12 










91 













Table 44. 

REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther. 
mometer 
Fahren- 
heit. 


HEIGHT OF THE BAROMETER IN INCHES. 


28.0 28.2 28.4 


28.6 


28.8 


29.0 29.2 29.4 ; 29.6 


29.8 


F. 


Inch, j Inch. 


luch. 


Inch. 


Inch. 


Inch. 1 luch. 


Inch. 


Inch. 


Inch. [ 


0?0 


+0.073 1+0.074 

1 


+0.074 


+0.075 j+0.075 


+0.076 


+0.076 


+0.077 


+0.077 


+0.078 


+0.5 


+0.072 


+0.072 


+0.073 


+0.073 


+0.074 


+0.074 


+0.075 


+0.075 


+0.076 


+0.076 ' 


I.O 


.070 


.071 


.071 


.072 


.072 


•073 


•073 


.074 


.074 


•075 


1-5 


.069 


.070 


.070 


.071 


.071 


.072 


.072 


•073 


•073 


■074 ! 


2.0 


.068 


.068 


.069 


.069 


.070 


.070 


.071 


.071 


.072 


.072 


2-5 


.067 ! .067 


.068 


.068 


.069 


.069 


.069 


.070 


.070 


.071 


3.0 


+0.065 


+0.066 


+0.066 


+ 0.067 


+0.067 


+0.068 


-L0.068 


+0.069 


+0.069 


+0.070 


3-5 


.064 


.065 


.065 


.065 


.066 


.066 


.067 


.067 


.068 


.068 


4.0 


.063 


.063 


.064 


.064 


.065 


.065 


.065 


.066 


.066 


.067 


4-5 


.062 


.062 


.062 


.063 


.063 


.064 


.064 


.065 


.065 


.065 ! 


5.0 


.060 


.061 


.061 


.062 


.062 


.062 


.063 


.063 


.064 


.064 


i 5.5 


fo.059 


+0.059 


+0.060 


+0.060 


+0.061 


+0.061 


+ 0.062 


+0.062 


+0.062 


+0.063 


1 6.0 


.058 


.058 


•059 


■059 


•059 


.060 


.060 


.061 


.061 


.061 


! 6.5 


.056 


.057 


•057 


.058 


.058 


.058 


•059 


•059 


.060 


.060 ; 


7.0 


.055 


-056 


•056 


•056 


■057 


•057 


■057 


.058 


.058 


■059 ■ 


7-5 


■054 


.054 


•055 


.055 


•055 


.056 


.056 


•057 


•057 


•057 


8.0 


1-0.053 


+0.053 


+ 0.053 


+0.054 


+0.054 


+0.054 


+0.055 


+0.055 


+0.056 1+0.056 1 


.S.5 


.051 


.052 


.052 


.052 


•053 


•053 


•053 


•054 


-054 


•055 


9.0 


• 050 


■050 


.051 


.051 


.051 


.052 


•052 


•053 


•053 


•053 


9-5 


.049 


.049 


.049 


.050 


.050 


.050 


.051 


.051 


■052 


.052 


lO.O 


.047 


.048 


.048 


.048 


.049 


.049 


.050 


.050 


.050 


.051 


10.5 


fo.046 


+0.047 


+0.047 


+ 0.047 


+0.048 


+0.048 


+0.048 


+0.049 


+0.049 


+ 0.049 


II. 


•045 


•045 


.046 


.046 


.046 


.047 


.047 


.047 


.047 


.048 


II-5 


.044 


.044 


.044 


•045 


•045 


•045 


.046 


.046 


.046 


.046 


12.0 


.042 .043 


.043 


•043 


.044 


.044 


■044 


.044 


•045 


•045 1 


12.5 


.041 


.041 


.042 


.042 


.042 


•043 


•043 


•043 


•043 


•044 


13.0 


-I-0.040 


-(-0.040 


-I-O.040 


+0.041 


fo.041 


+0.041 


+ 0.042 


+0.042 


+0.042 


+0.042 


13-5 


•039 


■039 


•039 


•039 


.040 


.040 


.040 


.040 


.041 


.041 


14.0 


•037 


.038 


.038 


.038 


.038 


•039 


•039 


•039 


•039 


.040 


14.5 


.036 


.036 


■037 


.037 


•037 


•037 


.038 


.038 


.038 


.038 


15.0 


•035 


.035 


•035 


•035 


.036 


.036 


.036 


•036 


■037 


•037 


i 15.5 


f 0.033 


+0.034 


+0.034 


+0.034 


+0.034 


+0.035 


+0.035 


+0.035 


+0.035 


+0.036 


16.0 


.032 


•032 


•033 


•033 


•033 


•033 


•034 


•034 


■034 


■034 


16.5 


.031 


.031 


.031 


•032 


.032 


.032 


.032 


.032 


•033 


•033 


17.0 


.030 


.030 


.030 


.030 


.030 


.031 


.031 


.031 


.031 


• 032 


17-5 


.028 


.029 


.029 


.029 


.029 


.029 


.030 


.030 


.030 


.030 


18.0 


f 0.027 


+0.027 


+0.027 


+ 0.028 


+0.028 


+0.028 


+ 0.028 


+0.028 


+0.029 


+0.029 


1S.5 


.026 


.026 


.026 


.026 


.027 


.027 


.027 


.027 


.027 


.027 


19.0 


.025 


.025 


■025 


• 025 


.025 


.025 


.026 


.026 


.026 


.026 ' 


>9-5 


.023 


.023 


.024 


.024 


.024 


.024 


.024 


.024 


.025 


•025 


20.0 


.022 


.022 .022 


.022 


.023 


•023 


.023 


.023 


.023 


.023 


20.5 


f 0.02 1 


+0.021 


+0.021 


+0.021 


+0.021 


+0.021 


+0.022 


+0.022 


-I-0.022 


+0.022 


21.0 


.019 


.020 


.020 


.020 


.020 


.020 


.020 


.020 


.021 


.021 


21.5 


.018 


.018 


.018 


.019 


.019 


.019 


.019 


.019 


.019 


.019 


22.0 


.017 


.017 


.017 


.017 


.017 


.017 


.018 


.018 


.018 


.018 


22.5 


.016 


.016 


.016 


.016 


.016 


.016 


.016 


.016 


.016 


.017 


23.0 


fo.014 


+0.014 


+ 0.015 


+0.015 


+0.015 


+0.015 


+0.015 


+0.015 


+0.015 


+0.015 1 


23.5 


.013 


.013 


.013 


.013 


.013 


.014 


.014 


.014 


.014 


.014 


24.0 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


.012 


•013 i 


24-5 


.011 


.011 


.01 I 


.Oil 


.Oil 


.01 I 


.Oil 


.Oil 


.Oil 


.Oil ! 


25.0 


.009 


.009 


.009 


.009 


.009 


.010 .010 

1 


.010 


.010 


.010 



Smithsonian Tablfs. 



92 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther- 
mometer 
Fahren 
helt. 



F. 

25?5 

26.0 
26.5 
27.0 

27-5 

28.0 

2S.5 
29.0 

29-5 
30.0 

30.5 

31.0 

31-5 
32.0 

32.5 

33.0 

33-5 
34-0 
34-5 
35-0 

35.5 

36.0 
36.5 
37.0 

37-5 

38.0 

38.5 
39- o 
39-5 
40.0 

40.5 

41.0 

41.5 
42.0 

42.5 

43.0 

43-5 
44.0 

44-5 
45-0 

45.5 

46.0 

46.5 
47.0 

47-5 

48.0 

48.5 
49-0 

49-5 
50.0 



HEIGHT OF THE BAROMETER IN INCHES. 



28.0 28.2 



luch. 
4-0.008 
.007 
.005 
.004 
.003 

-f- 0.002 

0.000 

— O.OOI 

.002 

.003 
-0.005 

.006 
.007 
.009 
.010 

— O.OII 

.012 
.014 

.015 

.016 

-0.017 
.019 
.020 

.021 
.023 

-0.024 
.025 
.026 
.028 
.029 

-0.030 
.031 
•033 
•034 
•035 

-0.036 
.038 

•039 
.040 
.042 



Inch. 
-f-0.008 
.007 
.005 
.004 
.003 

+ 0.002 
0.000 

— O.OOI 

.002 
.004 

-0.005 

.006 
.007 
.009 
.010 

— O.OII 

.012 
.014 

.015 

.016 

—0.018 
.019 
.020 
.021 

.023 

—0.024 

.025 

.027 

.028 

.029 



28.4 28.6 28.8 29.0 29.2 29.4 29.6 29.8 



Inch. 
-I-0.008 
.007 
.005 
.004 
.003 

-(-0.002 

0.000 

—O.OOI 

.002 
.004 

-0.005 

.006 
.007 
.009 
.010 

-O.OII 

.013 

.014 

.015 

.016 

-0.018 
.019 
.020 
.022 

.023 

-0.024 

.025 

.027 
.028 
.029 



Inch. 
-(-0.008 
.007 
.006 
.004 
.003 

-f-0.002 
0.000 

—O.OOI 
.002 
.004 

-0.005 
.006 
.007 
.009 
.010 

—O.OII 

.013 

.014 

.015 

.017 



-0.043 
.044 

■045 
.047 
.048 

-0.049 

.050 
.052 
■053 
•054 



-0.030 
.032 
•033 
•034 
•035 

-0.037 
.038 
■039 

.041 
.042 



-0.043 
.044 

046 

.047 
.048 

-0.050 
.051 
.052 
•053 
•055 



-0.031 
.032 
■033 
•034 
.036 

-0.037 
.038 

.040 
.041 
.042 

-0.043 

•045 

.046 

.047 
.049 

-0.050 
.051 
.052 
•054 
•055 



.019 
.020 
.022 

.023 

—0.024 
.026 
.027 

.028 
.030 

-0.031 
.032 
•033 
•035 
.036 

-0.037 
•039 

.040 
.041 
.042 

-0.044 

•045 

.046 

.048 
.049 

-0.050 
.052 
•053 
•054 
•055 



Inch. 
-(-0.008 
.007 
.006 
.004 
.003 

-(-0.002 

0.000 

— O.OOI 

.002 
.004 

-0.005 

.006 

.008 

.009 
.010 

-O.OII 

.013 

.014 

.015 

.017 



0.018 —0.018 



.019 
.021 
.022 

.023 

-0.024 
.026 
.027 

.028 
.030 

-0.031 

.032 

•034 
•035 
.036 

-0.038 

•039 

.040 
.041 

•043 

-0.044 

■045 
.047 
.048 
.049 

-0.051 
.052 
•053 
•054 
.056 



Inch. 
4-0.008 
.007 
.006 
.004 
.003 

-(- 0.002 

0.000 

—O.OOI 

.002 
.004 

-0.005 

.006 

.008 

.009 
.010 

-0.012 

.013 

.014 

.015 

.017 

—0.018 
.019 
.021 
.022 

.023 
-0.025 

.026 
.027 
.029 

.030 



Inch. 
-(-0.008 
.007 
.006 
.004 
.003 

-(-0.002 
0.000 
O.OOI 

.002 
.004 



Inch. 
+0.008 
.007 
.006 
.004 
.003 

+ 0.002 
0.000 
O.OOI 

.002 
.004 



-0.005 —0.005 
.006 .006 



-0.031 
■033 
•034 
■035 
.036 

-0.038 
•039 

.040 
.042 

•043 

-0.044 
.046 

.047 
.048 
.050 

-0.051 
.052 
•054 
•055 
.056 



.008 

.009 
.010 

-0.012 

.013 

.014 
.016 
.017 

—0.018 
.020 
.021 
.022 
.024 

-0.025 

.026 
.027 
.029 

.030 



-0.031 
•033 
•034 
•035 
•037 

-0.038 

•039 

.041 

.042 

•043 
-0.045 

.046 

.047 
.049 
.050 

-0.051 
•053 
•054 
•055 
•057 



.008 

009 
.010 

-0.012 

.013 

.014 
.016 
.017 

-0.018 
.020 
.021 
.022 
.024 

-0.025 

.026 
.028 
.029 

.030 

—0.032 

•033 
•034 
.036 

•037 
-0.038 

.040 
.041 
.042 

.044 
-0.045 

.046 

.048 
.049 
.050 

-0.052 
•053 
•054 
.056 

•057 



Inch. 
+ 0.008 
.007 
.006 
.004 
.003 

+0.002 

0.000 

-O.OOI 

.002 
.004 

-0.005 

.006 

.008 

.009 
.010 

-0.012 

.013 

.014 
.016 
.017 

-0.018 
.020 
.021 
.022 
.024 

-0.025 

.027 

.028 

.029 

.031 

-0.032 
•033 
■035 

.036 

•037 
-0.039 

.040 
.041 

•043 
.044 

-0.045 
.047 
.048 
.049 
.051 

-0.052 
•053 
•055 
.056 

•057 



Inch. 
+0.008 
.007 
.006 
.004 
.003 

+0.002 

0.000 

O.OOI 

.002 

.004 

-0.005 
.006 
.008 
.009 
.010 

—0.012 
.013 
.015 
.016 
.017 

—0.019 
.020 
.021 
.023 
.024 

■0.025 
.027 
.028 
.029 
.031 

— 0.032 
•033 
•035 
.036 

•037 

-0.039 
.040 
.042 

•043 
.044 

-0.046 
.047 
.048 
.050 
.051 

-0.052 
•054 
•055 
.056 
.058 



Smithsonian Tables. 



93 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther- 
mometer 
Fahren- 
heit. 






HEIGHT OF 


THE B.\ROMETER IN INCHES. 






28.0 


28.2 


28.4 


28.6 


28.8 


29.0 


29.2 


29.4 


29.6 


29.8 


F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


50?5 


-0.055 


-0.056 


-0.056 


-0.057 


-0.057 


-0.057 


-O.05S 


-0.058 


-0.059 


-0.059 


51.0 


•057 


•057 


.058 


.058 


.058 


•059 


.059 


.060 


.060 


.060 


51-5 


.058 


■058 


•059 


•059 


.060 


.060 


.061 


.061 


,061 


.062 


52.0 


•059 


.060 


.060 


.061 


.061 


.061 


.062 


.062 


.063 


.063 


52.5 


.061 


.061 


.061 


.062 


.062 


.063 


.063 


.064 


.064 


.064 


53.0 


—0.062 


—0.062 


-0.063 


-0.063 


—0.064 


—0.064 


—0.064 


-0.065 


-0.065 


—0.066 


53-5 


.063 


.064 


.064 


.064 


.065 


.065 


.066 


.066 


.067 


.067 


54-0 


.064 


.065 


.065 


.066 


.066 


.067 


.067 


.068 


.068 


.068 


54-5 


.066 


.066 


.067 


.067 


.067 


.068 


.068 


.069 


.069 


.070 


55-0 


.067 


.067 


.068 


.068 


.069 


.069 


.070 


.070 


.071 


.071 


55.5 


-0.068 


—0.069 


—0.069 


—0.070 


—0.070 


—0.071 


—0,071 


—0.072 


—0.072 


-0.073 


56.0 


.069 


.070 


.070 


.071 


.071 


.072 


.072 


•073 


.073 


.074 


56.5 


.071 


.071 


.072 


.072 


•073 


•073 


.074 


.074 


.075 


.075 


57-0 


.072 


.072 


•073 


.073 


.074 


.075 


.075 


.076 


.076 


.077 


57-5 


•073 


.074 


.074 


.075 


.075 


.076 


.076 


.077 


.077 


.078 


58.0 


-0.074 


-0.075 


—0.076 


—0.076 


-0.077 


-0.077 


—0.078 


—0.078 


-0.079 


— ((.079 


5S.5 


.076 


.076 


.077 


.077 


.078 


.078 


.079 


.080 


.080 


.081 


59-0 


.077 


.078 


.078 


.079 


.079 


.080 


.080 


.081 


.081 


.082 


59-5 


.078 


.079 


•079 


.080 


.081 


.081 


.082 


.082 


.083 


.083 


60.0 


.oSo 


.080 


.081 


.081 


.082 


.082 


.083 


.084 


.084 


.085 


60.5 


—0.081 


—0.081 


— O.0S2 


-O.0S3 


-0.083 


—0.084 


—0.084 


-0.085 


-0.085 


—0.086 


61.0 


.082 


.083 


.083 


.084 


.084 


.085 


.086 


.086 


.087 


.087 


61.5 


.083 


.084 


.085 


.085 


.086 


.086 


.087 


.087 


.088 


.089 


62.0 


.085 


.085 


.086 


.086 


.087 


.088 


.088 


.089 


.089 


.090 


62.5 


.086 


.o36 


.087 


.088 


.088 


.089 


.090 


.090 


.091 


.091 


63.0 


—0.087 


-0.088 


-0.088 


—0.089 


—0.090 


—0.090 


—0.091 


—0.091 


—0.092 


-0.093 


63.5 


.088 


.089 


.090 


.090 


.091 


.092 


.092 


.093 


•093 


.094 


64.0 


.090 


.090 


.091 


.092 


.092 


•093 


.093 


.094 


•095 


•095 


64-5 


.091 


.092 


.092 


•093 


•093 


.094 


.095 


.095 


.096 


.097 


65.0 


.092 


.093 


•093 


.094 


•095 


.095 


.096 


.097 


.097 


.098 


65.5 


-0.093 


-0.094 


-0.095 


-0.095 


—0.096 


-0.097 


-0.097 


—0.098 


-0.099 


-0.099 


66.0 


•095 


•095 


.096 


.097 


.097 


.098 


.099 


.099 


.100 


.101 


66.5 


.096 


.097 


.097 


.09S 


.099 


.099 


.100 


.101 


.101 


.102 


67.0 


.097 


.098 


.099 


•099 


.100 


.101 


.101 


.102 


.103 


.103 


67.5 


.098 


.099 


.100 


.101 


.101 


.102 


.103 


.103 


.104 


.105 


68.0 


— O.IOO 


—O.IOO 


— O.IOi 


—0.102 


-0.103 


—0.103 


— 0. 104 


-0.105 


-0. 105 


—0.106 


68. 5 


.101 


.102 


.102 


.103 


.104 


.105 


.105 


.106 


.107 


.107 


69.0 


.102 


.103 


.104 


.104 


.105 


.106 


.107 


.107 


.108 


.109 


69-5 


.104 


.104 


.105 


.106 


.106 


.107 


.108 


.109 


.109 


.110 


70.0 


.105 


.106 


.106 


.107 


.108 


.109 


.109 


.110 


.III 


.112 


70.5 


—0.106 


— 0. 107 


— 0. 108 


-0.108 


— 0. 109 


—O.I 10 


— O.III 


—O.III 


— O.II2 


-O.I 13 


71.0 


.107 


.108 


.109 


.110 


.110 


.III 


.112 


.113 


.113 


.114 


71.5 


.109 


.109 


.110 


.III 


.112 


.112 


.113 


.114 


.115 


.116 


72.0 


.110 


.III 


.III 


.112 


•113 


.114 


.115 


•115 


.116 


.117 


72.5 


.III 


.112 


•113 


•113 


.114 


.115 


.116 


.117 


.117 


.118 


73.0 


— O.I 12 


-O.I 13 


—O.I 14 


-O.I 15 


-O.I 16 


— O.II6 


— O.II7 


-O.I 18 


—O.I 19 


—0.120 


73-5 


.114 


.114 


•115 


.116 


.117 


.118 


.118 


.119 


.120 


.121 


74-0 


•115 


.116 


.117 


.117 


.118 


.119 


.120 


.121 


.121 


.122 


74-5 


.116 


.117 


.118 


.119 


.119 


.120 


.121 


.122 


.123 


.124 


75-0 


.117 


.118 


.119 


.120 


.121 


.122 


.122 


.123 


.124 


•125 



Smithsonian Tables. 



94 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 
Ther- 






HEIGHT OF 


THE BAROMETER IN INCHES. 






mometer 
Fahren- 
heit. 






















28.0 


28.2 


28.4 


28 6 


28 8 


29.0 


29.2 


29.4 


29 6 


29.8 


F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


75?5 


—O.I 19 


— 0.II9 


—0.120 


— O.I2I 


—0.122 


-0.123 


—0.124 


-0.125 


-0.125 


—0.126 


76.0 


.120 


.121 


.122 


.122 


.123 


.124 


•125 


.126 


.127 


.128 


76.5 


.121 


.122 


.123 


.124 


•125 


•125 


.126 


.127 


.128 


.129 


77.0 


.122 


.123 


.124 


•125 


.126 


.127 


.128 


.129 


.129 


.130 


77-5 


.124 


•125 


•125 


.126 


.127 


.128 


.129 


.130 


•131 


.132 


78.0 


-0.125 


—0.126 


—0.127 


— 0. ] 28 


—0.129 


—0.129 


—0.130 


-O.I3I 


-0.132 


-0.133 


78.5 


.126 


.127 


.128 


.129 


.130 


•131 


.132 


•133 


■^33 


•134 


79.0 


.127 


.128 


.129 


.130 


•131 


.132 


•133 


•134 


•135 


.136 


79-5 


.129 


.130 


•131 


•131 


.132 


•133 


.134 


•135 


.136 


•137 


80.0 


.130 


•131 


.132 


■^33 


•134 


•135 


.136 


.136 


•137 


.138 


80.5 


-O.I3I 


-0.132 


-0.133 


-0.134 


-0.135 


-0.136 


-0.137 


-0.138 


-0.139 


—0.140 


81.0 


.132 


•133 


•134 


•135 


.136 


.137 


.138 


•139 


.140 


.141 


81.5 


•134 


•135 


.136 


•137 


.138 


•139 


•139 


.140 


.141 


.142 


82.0 


•135 


.136 


.137 


.138 


•139 


.140 


.141 


.142 


.143 


.144 


82.5 


.136 


.137 


.138 


•139 


.140 


.141 


.142 


•143 


.144 


•145 


83.0 


-0.138 


-0.139 


-0. 139 


—0.140 


— O.141 


—0.142 


-0.143 


-0. 144 


-0.145 


—0.146 


83.5 


•139 


.140 


.141 


.142 


•143 


.144 


•145 


.146 


.147 


.148 


84.0 


.140 


.141 


.142 


•143 


.144 


•145 


.146 


.147 


.148 


.149 


84-5 


.141 


.142 


•143 


.144 


.145 


.146 


.147 


.14S 


.149 


.150 


85.0 


•143 


.144 


•145 


.146 


.147 


.148 


.149 


.150 


.151 


•152 


85.5 


-0. 144 


-0.145 


—0.146 


-0.147 


—0.148 


-0.149 


-0.150 


-O.151 


-0.152 


-0.153 


86.0 


■145 


.146 


.147 


.148 


.149 


.150 


■151 


.152 


•153 


.154 


86.5 


.146 


.147 


.148 


.149 


•151 


•152 


•153 


.154 


.155 


.156 


87.0 


.148 


.149 


.150 


• 151 


•152 


•153 


•154 


•155 


.156 


.157 


87.5 


.149 


.150 


•151 


•152 


.153 


.154 


•155 


.156 


•157 


.158 


88.0 


-0.150 


-0.151 


-0.152 


-0.153 


-0.154 


-0.155 


-0.157 


-0.158 


-0.159 


—0.160 


88.5 


•151 


.152 


.154 


•155 


.156 


•157 


.158 


•159 


.160 


.161 


89.0 


•153 


• 154 


•155 


.156 


.157 


.158 


•159 


.160 


.161 


.162 


89.5 


•154 


.155 


.156 


• 157 


.158 


•159 


.160 


.162 


.163 


.164 


90.0 


.155 


.156 


•157 


.158 


.160 


.161 


.162 


.163 


.164 


.165 


90.5 


—0.156 


-0. 157 


-0.159 


— 0. 160 


— O.161 


—0.162 


-0.163 


—0.164 


-0.165 


— 0. 166 


91.0 


.158 


•159 


.160 


.161 


.162 


.163 


.164 


.166 


.167 


.168 


91-5 


•159 


.160 


.161 


.162 


.163 


.165 


.166 


.167 


.168 


.169 


92.0 


.160 


.161 


.162 


.164 


.165 


.166 


.167 


.168 


.169 


.170 


92.5 


.161 


.163 


.164 


.165 


.166 


.167 


.168 


.169 


.171 


.172 


93.0 


-0.163 


—0.164 


-0.165 


—0.166 


—0.167 


-0.168 


—0.170 


— O.171 


—0.172 


-0.173 


93-5 


.164 


.165 


.166 


.167 


.169 


.170 


.171 


.172 


■ 173 


.174 


94.0 


.165 


.166 


.168 


.169 


.170 


.171 


.172 


•173 


•175 


.176 


94-5 


.166 


.168 


.169 


.170 


.171 


.172 


.174 


•175 


.176 


.177 


95-0 


.168 


.169 


.170 


.171 


.172 


.174 


•175 


.176 


.177 


.178 


95.5 


—0.169 


—0.170 


— O.171 


-0.173 


-0.174 


-0.175 


—0.176 


-0.177 


-0.179 


—0.180 


96.0 


.170 


.171 


•173 


.174 


•175 


.176 


.177 


.179 


.180 


.181 


96.5 


.171 


.173 


•174 


• 175 


.176 


.178 


.179 


.180 


.181 


.182 


97.0 


•173 


.174 


•175 


.176 


.178 


.179 


.180 


.181 


.183 


.184 


97-5 


.174 


.175 


.176 


.178 


.179 


.180 


.181 


.183 


.184 


.185 


98.0 


-0.175 


-0.176 


-0.178 


-0.179 


—0.180 


-O.181 


-0.183 


—0.184 


-0.185 


-0.186 


98.5 


.176 


.178 


.179 


.iSo 


.181 


.183 


.1S4 


.185 


.187 


.188 


99.0 


.178 


.179 


.180 


.182 


.183 


.184 


.185 


.187 


.188 


.189 


99-5 


.179 


.180 


.182 


.183 


.184 


.185 


.187 


.188 


.189 


.190 


1 00.0 


.180 


.182 


.183 


.184 


.185 


.187 


.188 


.189 


.191 


.192 



Smithsoniar Tables. 



95 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE 

ENGLISH MEASURES. 



Attached 

Ther- 
Tiometer 
Fahren- 
heit. 


HEIGHT OF THE BAROMETER IN INCHES. 




29.8 


30.0 


30.2 


30.4 


30.6 


30.8 


31.0 


31.2 


31.4 


31.6 I 




F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 




0?0 


-I-O.07S 


+0.078 


+0.079 


+0.079 


+0.080 


+0.080 


+0.081 


+0.081 


+O.0S2 


+0.082 




0.5 


-1-0.076 


+0.077 


+0.077 


+0.078 


+0.078 


+0.079 


+0.079 


+0.080 


+O.0S0 


+ 0.081 




I.O 


.075 


.076 


.076 


.077 


.077 


.078 


.078 


.079 


.079 


.oSo 




1.5 


•074 


.074 


.075 


• 075 


.076 


.076 


.077 


.077 


.078 


.078 




2.0 


.072 


•073 


.073 


.074 


.074 


.075 


.075 


.076 


.076 


.077 




2.5 


.071 


.071 


.072 


.072 


•073 


.073 


.074 


.074 


•075 


•075 




3.0 


+0.070 


+0.070 


+0.070 


+0.071 


+0.071 


+0.072 


+0.072 


+0.073 


+0.073 


+0.074 




3-5 


.06S 


.069 


.069 


.070 


.070 


.070 


.071 


.071 


.072 


.072 




4.0 


.067 


.067 


.068 


.06S 


.069 


.069 


.070 


.070 


.070 


.071 




4-5 


.065 


.066 


.066 


.067 


.067 


.068 


.068 


.069 


.069 


.069 




5-0 


.064 


.065 


.065 


.065 


.066 


.066 


.067 


.067 


.068 


.068 




5.5 


+0.063 


+0.063 


+0.064 


+0.064 


+0.064 


+0.065 


+0.065 


+0.066 


+0.066 


+0.067 




6.0 


.061 


.062 


.062 


•063 


•063 


.063 


.064 


.064 


.065 


.065 




6.5 


.060 


.060 


.061 


.061 


.062 


.062 


.062 


.063 


.063 


.064 




7.0 


•059 


.059 


•059 


.060 


.060 


.061 


.061 


.061 


.062 


.062 




7-5 


•057 


.058 


.058 


.058 


•059 


•059 


.060 


.060 


.060 


.061 




8.0 


+0.056 


+0.056 


+0.057 


+0.057 


+0.057 


+0.058 


+0.058 


+0.059 


+0.059 


+0.059 




8.5 


•055 


•055 


•055 


.056 


.056 


.056 


.057 


•057 


.058 


-058 




9.0 


•053 


•054 


•054 


•054 


•055 


•055 


•055 


.056 


.056 


.056 




9-5 


.052 


.052 


•053 


•053 


•053 


.054 


•054 


•054 


•055 


•055 




lO.O 


.051 


.051 


.051 


.052 


.052 


.052 


.053 


•053 


■053 


•054 




10.5 


+0.049 


+0.049 


+0.050 


+0.050 


+0.050 


+0.051 


+0.051 


+0.051 


+0.052 


+0.052 




II. 


.048 


.048 


.048 


.049 


.049 


.049 


.050 


.050 


.050 


.051 




II-5 


.046 


.047 


•047 


.047 


.048 


.048 


.048 


.049 


•049 


.049 




12.0 


•045 


•045 


.046 


.046 


.046 


.047 


.047 


.047 


.048 


.048 




12.5 


.044 


.044 


.044 


•045 


•045 


•045 


•045 


.046 


.046 


.046 




13.0 


+0.042 


+0.043 


+0.043 


+0.043 


+0.044 


+0.044 


+0.044 


+0.044 


+0.045 


+0.045 




13-5 


.041 


.041 


.042 


.042 


.042 


.042 


•043 


•043 


•043 


•043 




14.0 


.040 


.040 


.040 


.040 


.041 


.041 


.041 


.042 


.042 


.042 




14-5 


.038 


■039 


•039 


•039 


•039 


.040 


.040 


.040 


.040 


.041 




15-0 


•037 


•037 


•037 


■038 


.038 


.038 


.038 


•039 


•039 


•039 




15.5 


+0.036 


+0.036 


+0.036 


+0.036 


+0.037 


+0.037 


+0.037 


+0.037 


+0.037 


+0.038 




16.0 


.034 


•034 


•035 


•035 


•035 


•035 


• 036 


.036 


.036 


.036 




16.5 


•033 


•033 


•033 


.034 


•034 


•034 


•034 


•034 


•035 


•035 




17.0 


.032 


.032 


.032 


.032 


.032 


•033 


•033 


•033 


•033 


•033 




17-5 


.030 


.030 


.031 


.031 


.031 


.031 


.031 


•032 


.032 


.032 




18.0 


+0.029 


+0.029 


+0.029 


+0.029 


+0.030 


+0.030 


+0.030 


+0.030 


+0.030 


+0.031 




18.5 


.027 


.028 


.028 


.028 


.028 


.028 


.029 


.029 


.029 


.029 




19.0 


.026 


.026 


.026 


.027 


.027 


.027 


.027 


.027 


.027 


.028 




19-5 


•025 


.025 


.025 


.025 


.025 


.026 


.026 


.026 


.026 


.026 




20.0 


.023 


.024 


.024 


.024 


.024 


.024 


.024 


.024 


.025 


.025 




20.5 


+0.022 


+0.022 


+0.022 


+0.022 


+0.023 


+0.023 


+0.023 


+0.023 


+0.023 


+0.023 




21.0 


.021 


.021 


.021 


.021 


.021 


.021 


.022 


.022 


.022 


.022 




21.5 


.019 1 .019 


.020 


.020 


.020 


.020 


.020 


.020 


.020 


.020 




22.0 


.018 i .018 


.018 


.018 


.018 


.019 


.019 


.019 


.019 


.019 




22.5 


.017 


.017 


.017 


.017 


.017 


.017 


.017 


.017 


.017 


.018 




23.0 


+0.015 


+0.015 


+0.015 


+0.016 


+0.016 


+0.016 


+0.016 


+0.016 


+0.016 


+0.016 




23-5 


.014 


.014 


.014 


.014 


.014 


.014 


.014 


.015 


.015 


.015 




24.0 


.013 


.013 


.013 


.013 


.013 


.013 


•013 


.013 


.013 


.013 




24-5 


.Oil 


.Oil 


.Oil 


.0:1 


.Oil 


.012 


.012 


.012 


.012 


.012 




25.0 


.010 


.010 


.010 


.010 .010 


.010 


.010 


.010 


0. 10 


.010 





Smithsonian Tables. 



g6 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attache 
Ther- 


1 




HEIGHT OF 


THE BAROMETER IN INCHES. 






T 


momete 

Fahren 

heit. 


r 






















29.8 


30.0 


30.2 


30.4 


30.6 


30.8 


31.0 


31.2 


31.4 


31.6 




F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 




25?5 

26.0 


-I-O.O08 


+0.009 


+0.009 


+0.009 1+0.009 


+0.009 


+0.009 


+0.009 


+0.009 


+0.009 




.007 


.007 


.007 


.007 


.007 


.007 


.007 


.007 


.008 


.008 




26.5 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 


.006 




27.0 


.004 


.004 


.004 


.005 


.005 


.005 


.005 


.005 


.005 


.005 




27-5 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 


.003 




28.0 


-fo.002 


+ 0.002 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 


+0.002 




28.5 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 


0.000 




29.0 


— O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 


—O.OOI 




29-5 


.002 


.002 


.002 


,002 


.002 


.002 


.002 


.002 


.002 


.002 




30.0 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 


.004 




30.5 


-0.005 


-0.005 


-0,005 


-0.005 


—0.005 


-0.005 


-0.005 


-0.005 


—0.005 


—0.005 




31.0 


.006 


.006 


.006 


.007 


.007 


.007 


.007 


.007 


.007 


.007 




31-5 


.008 


.008 


.008 


.008 


.008 


.008 


.008 


.008 


.008 


.008 




32.0 


.009 


.009 


.009 


.009 


.009 


.009 


.009 


.010 


.010 


.010 




32.5 


.010 


.oil 


.Oil 


.Oil 


.oil 


.011 


.oil 


.011 


.oil 


.oil 




33.0 


—0.012 


—0.012 


—0.012 


—0.012 


—0.012 


—0.012 


—0.012 


—0.012 


—0.012 


—0.013 




33-5 


.013 


.013 


.013 


.013 


.014 


.014 


.014 


.014 


.014 


.014 




34-0 


.015 


.015 


•015 


.015 


.015 


.015 


.015 


.015 


.015 


.015 




34-5 


.016 


.016 


.016 


.016 


.016 


.016 


.017 


.017 


.017 


.017 




35-0 


.017 


.017 


.017 


.018 


.018 


.018 


.018 


.018 


.018 


.018 




35.5 

36.0 


-0.019 


—0.019 


—0.019 


—0.019 


—0.019 


—0.019 


—0.019 


—0.019 


—0.020 


—0.020 




.020 


.020 


.020 


.020 


.020 


.021 


.021 


.021 


.021 


.021 




36.5 


.021 


.021 


.022 


.022 


.022 


.022 


.022 


.022 


.022 


.023 




37-0 


.023 


.023 


.023 


.023 


.023 


.023 


.024 


.024 


.024 


.024 




37-5 


.024 


.024 


.024 


.024 


.025 


•025 


.025 


.025 


.025 


.025 




38.0 


-0.025 


—0.026 


—0.026 


—0.026 


—0.026 


—0.026 


—0.026 


—0.027 


—0.027 


— 0.027 




38.5 


.027 


.027 


.027 


.027 


.027 


.028 


.028 


.028 


.028 


.028 




39-0 


.028 


.028 


.028 


.029 


.029 


.029 


.029 


.029 


.030 


.030 




39-5 


.029 


.030 


.030 


.030 


.030 


.030 


.031 


.031 


.031 


.031 




40.0 


.031 


.031 


.031 


.031 


•032 


.032 


.032 


.032 


.032 


•033 




40.5 


-0.032 


-0.032 


-0.033 


-0.033 


-0.033 


-0.033 


-0.033 


-0.034 


-0.034 


-0.034 




41.0 


•033 


•034 


•034 


•034 


.034 


•035 


.035 


•035 


•035 


•035 




41-5 


•035 


•035 


•035 


•035 


.036 


.036 


.036 


.036 


•037 


•037 




42.0 


.036 


.036 


.037 


.037 


.037 


•037 


.038 


.038 


.038 


.038 




42.5 


.037 


.038 


.038 


.038 


.038 


•039 


•039 


•039 


.040 


.040 




43.0 


-0.039 


-0.039 


-0.039 


-0.040 - 


-0.040 


-0.040 - 


-0.040 


-0.041 


—0.041 - 


-0.041 




43-5 


.040 


.040 


.041 


.041 


.041 


.042 


.042 


.042 


.042 


.043 




44.0 


.042 


.042 


.042 


.042 


•043 


•043 


•043 


•043 


.044 


.044 




44-5 


•043 


•043 


.043 


.044 


.044 


.044 


•045 


•045 


•045 


•045 




45-0 


.044 


.045 


•045 


.045 


.045 


.046 


.046 


.046 


.047 


.047 




45.5 


-0.046 


—0.046 • 


—0.046 - 


-0.047 - 


-0.047 - 


-0.047 - 


-0.047 


-0.048 - 


-0.048 - 


"0.048 




46.0 
46.5 


.047 


.047 


.048 


.048 


.048 


.049 


.049 


.049 


.049 


.050 




.048 


.049 


.049 


.049 


.050 


.050 


.050 


.051 


.051 


.051 




47.0 


.050 


.050 


.050 


.051 


.051 


.051 


.052 


.052 


.052 


•053 




47.5 


.051 


.051 


.052 


.052 


.052 


•053 


•053 


•053 


•054 


.054 




48.0 

48.5 


-0.052 


-0.053 ■ 


-0.053 ■ 


-0.053 - 


-0.054 - 


-0.054 - 


-0.054 - 


-0.055 - 


-0.055 - 


-0.055 




•054 


.054 


.054 


.055 


•055 


.055 


.056 


.056 


•057 


•057 




49.0 


•055 


.055 


.056 


.056 


.057 


.057 


.057 


.058 


.058 


.058 




49-5 


.056 


•057 


.057 


.058 


.058 


.058 


•059 


.059 


•059 


.060 




50.0 


.058 


.058 


.058 


•059 


•059 


.060 


.060 


.060 


.061 


.061 





Smithsonian Tabie*. 



97 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE, 

ENGLISH MEASURES. 



< Attached 
1 Ther. 






HEIGHT OF 


THE B.\ROMETER IN INCHES. 








mometer 
Fahren- 
heit. 
























29.8 


30.0 


30.2 


30.4 


30.6 


30.8 


31.0 


31.2 


31.4 


31.6 




F. 


Inch. 


Inch. 


luch. 


luch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 




50?5 


-0.059 


-0.059 


—0.060 


—0.060 


—0.061 


—0.061 


—0.061 


—0.062 


—0.062 


-0.063 




! 5I-0 


.060 


.061 


.061 


.062 


.062 


.062 


.063 


.063 


.064 


.064 




51-5 


.062 


.062 


.063 


.063 


.063 


.064 


.064 


.065 


.065 


.065 




52.0 


.063 


.064 


.064 


.064 


.065 


.065 


.066 


.066 


.066 


.067 




52.5 


.064 


.065 


.065 


.066 


.066 


.067 


.067 


.067 


.068 


.068 




53.0 


—0.066 


—0.066 


—0.067 


—0.067 


—0.068 


-O.06S 


-O.06S 


—0.069 


—0.069 


—0.070 




53 5 


.067 


.06S 


.068 


.069 


.069 


.069 


.070 


.070 


.071 


.071 




54-0 


.06S 


.069 


.069 


.070 


.070 


.071 


.071 


.072 


.072 


.073 




54-5 


.070 


.070 


.071 


.071 


.072 


.072 


•073 


•073 


.074 


.074 




55-0 


.071 


.072 


.072 


.073 


.073 


.074 


.074 


.075 


.075 


•075 




55.5 


-0.073 


-0.073 


-0.074 


-0.074 


-0.074 


-0.075 


-0.075 


—0.076 


—0.076 


-0.077 




56.0 


.074 


.074 


•075 


•075 


.076 


.076 


.077 


.077 


.078 


.078 




56.5 


•075 


.076 


.076 


.077 


.077 


.078 


.078 


.079 


.079 


.080 




57-0 


•077 


.077 


.078 


.078 


.079 


.079 


.oSo 


.oSo 


.081 


.081 




57.5 


.07S 


.078 


.079 


■079 


.080 


.081 


.081 


.082 


.082 


.083 




58.0 


-0.079 


— o.oSo 


—0.080 


—0.081 


—0.081 


— O.0S2 


—0.082 


-0.083 


—0.084 


—0.084 




58.5 


.oSi 


.081 


.082 


.082 


.083 


.083 


.084 


.084 


.085 


.085 




59-0 


.082 


.083 


.083 


.084 


.084 


.085 


.085 


.086 


.086 


.087 




59-5 


.083 


.084 


.084 


.085 


.086 


.086 


.087 


.087 


.088 


.088 




60.0 


.0S5 


.085 


.086 


.086 


.087 


.087 


.088 


.089 


.089 


.090 




60.5 


-0.0S6 


—0.087 


—0.087 


-0.088 


-0.088 


—0.089 


— 0.0S9 


—0.090 


—0.091 


—0.091 




6r.o 


.0S7 


.0S8 


.089 


.089 


.090 


.090 


.091 


.091 


.092 


•093 




61.5 


.089 


.0S9 


.090 


.090 


.091 


.092 


.092 


•093 


•093 


•094 




62.0 


.090 


.091 


.091 


.092 


.092 


•093 


.094 


•094 


.095 


•095 




62.5 


.091 


.092 


•093 


•093 


.094 


.094 


.095 


.096 


.096 


■097 




63.0 


-0.093 


-0.093 


—0.094 


-0.095 


-0.095 


—0.096 


—0.096 


-0.097 


—0.098 


— 0.098 




63-5 


.094 


•095 


•095 


.096 


.097 


.097 


.098 


.098 


.099 


.100 




64.0 


• 095 


.096 


•097 


.097 


.098 


.099 


.099 


.100 


.101 


.101 




64.5 


.097 


•097 


.098 


.099 


•099 


.100 


.101 


.101 


.102 


.103 




65.0 


.098 


.099 


.099 


.100 


.101 


.101 


.102 


.103 


.103 


.104 




65.5 


—0.099 


— 0. 100 


— 0. lOI 


— O.IOI 


— 0. 102 


-0.103 


-0.103 


— 0. 104 


-0.105 


-0. 105 




66.0 


.101 


.101 


.102 


.103 


.103 


.104 


.105 


.106 


.106 


.107 




66.5 


.102 


.103 


.103 


.104 


.105 


.106 


.106 


.107 


.108 


.loS 




67.0 


.103 


.104 


.105 


.106 


.106 


.107 


.108 


.108 


.109 


.110 




67.5 


.105 


.106 


.106 


.107 


.108 


.108 


.109 


.110 


.110 


.III 




68.0 


—0.106 


—0.107 


— 0. 108 


— 0. 108 


—0.109 


—O.I 10 


-0.1 10 


— 0. 1 1 1 


—O.I 12 


-0.1 13 




68. 5 


.107 


.108 


.109 


.110 


.110 


.III 


.112 


•113 


.113 


.114 




69.0 


.109 


.110 


.110 


.III 


.112 


.112 


•113 


.114 


.115 


• 115 




69-5 


.110 


.III 


.112 


.112 


•113 


.114 


.115 


.115 


.116 


.117 




70.0 


.112 


.112 


•113 


.114 


•115 


•115 


.116 


.117 


.117 


.118 




70.5 


-0.1 13 


—0.1 14 


—O.I 14 


-O.I 15 


—O.I 16 


— O.II7 


—0.1 17 


-0.1 18 


—O.I 19 


—0.120 




71.0 


.114 


•115 


.116 


.116 


.117 


.118 


.119 


.120 


.120 


.121 




71-5 


.116 


.116 


.117 


.118 


.119 


.119 


.120 


.121 


.122 


.123 




72.0 


.117 


.118 


.118 


.119 


.120 


.121 


.122 


.122 


.123 


.124 




72.5 


.118 


.119 


.120 


.121 


.121 


.122 


.123 


.124 


•125 


• 125 




73.0 


—0.120 


—0.120 


— 0. 121 


—0.122 


—0.123 


—0.124 


—0.124 


-0.125 


—0.126 


—0.127 




73-5 


.121 


.122 


.123 


.123 


.124 


•125 


.126 


.127 


.127 


.12S 




74.0 


.122 


.123 


.124 


.125 


.126 


.126 


.127 


.128 


.129 


.130 




74-5 


.124 


.124 


.125 


.126 


.127 


.128 


.129 


.129 


.130 


• 131 




75-0 


•125 


.126 


.127 


.127 


.128 


.129 


.130 


•131 


.132 


.132 





Smithsonian Tables. 



98 



Table 44. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

ENGLISH MEASURES. 



Attached 

Ther- 
mometer 
Fahren- 
heit. 


HEIGHT OF THE BAROMETER IN INCHES. 




29.8 


30.0 


30.2 


30.4 


30.6 


30.8 


31.0 


31.2 


31.4 


31.6 




F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 




75?5 


—0.126 


—0.127 


-0.128 


—0.129 


-0.130 


-O.I31 


-O.131 


-0.132 


-0.133 


-0.134 




76.0 


.128 


.128 


.129 


.130 


•131 


.132 


•133 


•134 


•134 


•135 




76.5 


.129 


.130 


•131 


.132 


.132 


•133 


•134 


•135 


.136 


■137 




77.0 


.130 


•131 


.132 


•133 


.134 


•135 


.136 


.136 


.137 


.138 




77-5 


.132 


•133 


•133 


•134 


•135 


.136 


•137 


.138 


.139 


.140 




78.0 


-0.133 


-0.134 


-0.135 


-0.136 


-0.137 


-0.137 


-0.138 


-0.139 


—0.140 


— 0. 141 




78.5 


•134 


•135 


.136 


.137 


.138 


•139 


.140 


.141 


.142 


.142 




79.0 


.136 


•137 


•i37 


.138 


•139 


.140 


.141 


.142 


•143 


.144 




79-5 


.137 


.138 


•139 


.140 


.141 


.142 


.143 


.143 


.144 


•145 




80.0 


.138 


•139 


.140 


.141 


.142 


•143 


.144 


•145 


.146 


.147 




80.5 


-0.140 


— O.141 


—0.142 


— 0. 142 


-0.143 


-0.144 


-0.145 


—0.146 


-0.147 


—0.148 




81.0 


.141 


.142 


.143 


.144 


•145 


.146 


.147 


.148 


.149 


.150 




81.5 


.142 


.143 


.144 


•145 


.146 


.147 


.148 


.149 


.150 


.151 




82.0 


.144 


.145 


.146 


.147 


.148 


.149 


.149 


.150 


•151 


.152 




82.5 


.145 


.146 


.147 


.148 


.149 


.150 


•151 


•152 


•153 


.154 




83.0 


—0. 146 


-0.147 


—0.148 


-0. 149 


-0.150 


-O.151 


-0.152 


-0.153 


-0.154 


-0.155 




83.5 


.148 


.149 


.150 


•151 


•152 


•153 


•154 


•155 


.156 


•157 




84.0 


.149 


.150 


•151 


.152 


•153 


.154 


•155 


.156 


•157 


.158 




84-5 


.150 


.151 


•152 


•153 


.154 


•155 


.156 


•157 


.158 


•159 




85.0 


•152 


•153 


• 154 


•155 


.156 


•157 


.158 


•159 


.160 


.161 




85.5 


-0.153 


-0.154 


-0.155 


—0.156 


-0.157 


-0.158 


—0.159 


—0.160 


— O.161 


—0.162 




86.0 


.154 


.155 


.156 


.158 


•159 


.160 


.161 


.162 


.163 


.164 




86.5 


.156 


•157 


.158 


•159 


.160 


.161 


.162 


.163 


.164 


.165 




87.0 


.157 


.158 


•159 


.160 


.161 


.162 


.163 


.164 


.166 


.167 




87.5 


.158 


•159 


.161 


.162 


.163 


.164 


.165 


.166 


.167 


.168 




88.0 


—0.160 


— O.161 


—0.162 


-0.163 


—0.164 


-0.165 


—0.166 


—0.167 


-0.168 


— 0. 169 




88.5 


.161 


.162 


.163 


.164 


.165 


.166 


.168 


.169 


.170 


.171 




89.0 


.162 


.164 


.165 


.166 


.167 


.168 


.169 


.170 


.171 


.172 




89.5 


.164 


.165 


.166 


.167 


.168 


.169 


.170 


.171 


•173 


.174 




90.0 


.165 


.166 


.167 


.168 


.170 


.171 


.172 


•173 


.174 


•175 




90.5 


—0.166 


-0. 168 


— 0. 169 


—0.170 


— O.171 


—0.172 


-0.173 


-0.174 


-0.175 


—0.176 




91.0 


.168 


.169 


.170 


.171 


.172 


.173 


.175 


.176 


.177 


.178 




91-5 


.169 


.170 


.171 


•173 


.174 


.175 


.176 


.177 


.178 


.179 




92.0 


.170 


.172 


•173 


.174 


•175 


.176 


.177 


.178 


.180 


.181 




92.5 


.172 


.173 


.174 


•175 


.176 


.178 


.179 


.180 


.181 


.182 




93.0 


-0.173 


-0.174 


-0.175 


-0.177 


-0.178 


-0.179 


—0.180 


-O.181 


-0.182 


— 0. 184 




93-5 


.174 


.176 


.177 


.178 


.179 


.180 


.181 


.183 


.184 


.185 




94.0 


.176 


.177 


.178 


.179 


.180 


.182 


.183 


.184 


.185 


.186 




94-5 


.177 


.178 


.179 


.181 


.182 


.183 


.184 


.185 


.187 


.188 




95-0 


.178 


.180 


.181 


.182 


.183 


.184 


.186 


.187 


.188 


.189 




95.5 


—0.180 


-O.181 


-0.182 


-0.183 


-0.185 


-0.186 


-0.187 


-0.188 


— 189 


— 0.I9I 




96.0 


.181 


.182 


.184 


.185 


.186 


.187 


.188 


.190 


.191 


.192 




96-5 


.182 


.184 


.185 


.186 


.187 


.189 


.190 


.191 


.192 


•193 




97.0 


.184 


.185 


.186 


.187 


.189 


.190 


.191 


.192 


.194 


•195 




97-5 


.185 


.186 


.188 


.189 


.190 


.191 


•193 


.194 


•195 


.196 




98.0 


-o.x86 


-0.188 


—0.189 


—0. 190 


— O.I91 


-0.193 


-0.194 


-0.195 


—0.196 


—0.198 




98.5 


.188 


.189 


.190 


.192 


•193 


.194 


•195 


.197 


.19S 


.199 




99.0 


.189 


.190 


.192 


•193 


.194 


•195 


.197 


.198 


.199 


.201 




99-5 


.190 


.192 


•193 


.194 


.196 


.197 


.198 


.199 


.201 


.202 




100. 


.192 


•193 


.194 


.196 


.197 


.198 


.200 


.201 


.203 


.203 





Bmithsonian Tables. 



QQ 



Table 45. 

REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION TO BE SUBTRACTED. 



Attached 


HEIGHT OF THE B.\ROMETER IN MILLIMETERS. 


Ther- 
mofneter 




Centi- 
grade. 


440 


450 


460 


470 


480 


490 


500 


510 


520 


530 


540 


550 


560 


C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


oro 


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 


0.5 


.04 


.04 


.04 


.04 


.04 


.04 


.04 


.04 


.04 


.04 


.04 


.04 


•05 


I.O 


.07 


.07 


.08 


.08 


.08 


.08 


.08 


.08 


.08 


.09 


.09 


.09 


.09 


1-5 


.11 


.11 


.11 


.12 


.12 


.12 


.12 


.12 


•13 


■13 


-13 


•13 


.14 


2.0 


.14 


.15 


.15 


•15 


.16 


.16 


.16 


•17 


•17 


•17 


.18 


.18 


.18 


2.5 


0.18 


0.18 


0.19 


0.19 


0.20 


0.20 


0.20 


21 


0.21 


0.22 


0.22 


0.22 


0.23 


30 


.22 


.22 


•23 


•23 


.24 


•24 


•24 


•25 


.25 


.26 


.26 


.27 


.27 


3-5 


•25 


.26 


.26 


•27 


•27 


.28 


.29 


.29 


■30 


•30 


•31 


•31 


■32 


4.0 


.29 


.29 


•30 


•31 


•31 


•32 


•33 


•33 


•34 


•35 


•35 


•36 


•37 


4-5 


•32 


•33 


•34 


•35 


■35 


•36 


■37 


■37 


•38 


■39 


.40 


.40 


.41 


5.0 


0.36 


0.37 


0.38 


0.38 


0-39 


0.40 


0.41 


0.42 


0.42 


0.43 


0.44 


o^45 


0.46 


5-5 


.40 


.40 


.41 


.42 


•43 


.44 


•45 


.46 


•47 


.48 


48 


•49 


•50 


6.0 


■43 


.44 


•45 


.46 


•47 


.48 


•49 


•50 


•51 


•52 


•53 


•54 


•55 


6.5 


•47 


.48 


•49 


•50 


•51 


•52 


•53 


■54 


•55 


.56 


•57 


•58 


•59 


7.0 


•50 


•51 


•53 


•54 


.55 


.56 


•57 


•58 


•59 


.61 


.62 


•63 


.64 


7.5 


0.54 


0.55 


0.56 


0.5S 


0.59 


0.60 


0.61 


0.62 


0.64 


0.65 


0.66 


0.67 


0.69 


80 


■57 


•59 


.60 


.61 


•63 


.64 


• 65 


.67 


.68 


.69 


.70 


•72 


•73 


8.5 


.61 


.62 


.64 


■65 


.67 


.68 


.69 


.71 


•72 


•73 


•75 


.76 


.78 


9.0 


•65 


.66 


.68 


.69 


.70 


.72 


• 73 


•75 


• 76 


.78 


•79 


.81 


.82 


9-5 


.68 


.70 


.71 


•73 


.74 


.76 


• 77 


•79 


.Si 


.82 


.84 


•85 


.87 


10.0 


0.72 


o^73 


0.75 


0.77 


0.78 


0.80 


0.S2 


0.83 


0.85 


0.86 


0.88 


0.90 


0.91 


10.5 


■75 


■77 


•79 


.80 


.82 


•84 


.86 


.87 


•89 


.91 


.92 


•94 


.96 


II. 


•79 •Si 


•83 


.84 


.86 


.88 


.90 


•91 


•93 


•95 


•97 


•99 


1. 00 


II-5 


.83 .84 


.86 


.88 


.90 


.92 


•94 


.96 


•98 


•99 


1. 01 


1.03 


1.05 


12.0 


.86 .88 


.90 


.92 


.94 


.96 


.98 


1. 00 


1.02 


1.04 


1.06 


1.08 


1. 10 


13.0 


93 0.95 


0.97 


1. 00 


1.02 


1.04 


1.06 


1.08 


1. 10 


1. 12 


1. 14 


1. 17 


1. 19 


14.0 


1. 00 1.03 


1.05 


r.07 


1. 10 


1. 12 


1. 14 


1. 16 


1. 19 


1. 21 


1.23 


^•25 


1.28 


15.0 


1.08 


I 10 


1. 12 


1.15 


1.17 


1.20 


1.22 


1-25 


1.27 


1.30 


1.32 


^•34 


1^37 


16.0 


I 15 


1.17 


1.20 


1-23 


1-25 


1.28 


1.30 


1^33 


1.36 


1^38 


1. 41 


1^43 


I 46 


17.0 


1.22 


1^25 


1.27 


1.30 


1-33 


1.36 


1.38 


1.41 


1.44 


1.47 


1.50 


1^52 


1^55 


18.0 


1.29 


1.32 


1-35 


i^38 


1.41 


1.44 


1.47 


l^50 


^•52 


1-55 


1.58 


1. 61 


1.64 


19.0 


1.36 


1^39 


1.42 


1^45 


1.49 


1.52 


1^55 


1.58 


1.61 


1.64 


1.67 


1.70 


1^73 


20.0 


1-43 


1.47 


1.50 


1-53 


1.56 


1.60 


i^63 


1.66 


1.69 


^73 


1.76 


1.79 


1.82 


21.0 


1.50 


1-54 


1^57 


1. 61 


1.64 


1.67 


1.71 


1.74 


1.78 


1.81 


1.85 


1.88 


1.91 


22.0 


i-ss 


1.61 


1.65 


1.68 


1.72 


1.75 


1.79 


1.83 


1.86 


1.90 


1-93 


1.97 


2.01 


23.0 


1.65 1. 68 


1.72 


1.76 


1.80 


1.83 


1.87 


191 


1-95 


1.98 


2.02 


2.06 


2.10 


24.0 


1.72 1 1.76 


1.80 


1.84 


1.87 


1.91 


1^95 


1.99 


2.03 


2.07 


2. II 


2.15 


2.19 


25.0 


1.79 ! T.83 


1.87 


1. 91 


195 


1.99 


2.03 


2.07 


2. II 


2.16 


2.20 


2.24 


2.28 


26.0 


1.86 : 1.90 


195 


1.99 


2.03 


2.07 


2. II 


2.16 


2.20 


2.24 


2.28 


2.33 


2.37 


27.0 


193 


1.98 


2.02 


2.06 


2. II 


2.15 


2.20 


2.24 


2.28 


2.33 


2.37 


2.41 


2.46 


28.0 


2.00 


2.05 


2.09 


2.14 


2.18 


2.23 


2.28 


2.32 


2.37 


2.41 


2.46 


2.50 


2.55 


29.0 


2.07 


2.12 


2.17 


2.22 


2.26 


2.31 


2.36 


2.40 


2.45 ! 


2.50 


2.55 


2.59 


2.64 


30.0 


2.15 


2.19 


2.24 


2.29 


=•34 


2.39 


2.44 


2.49 


: 54 i '..^.8 


2.63 


2.68 


2.73 


31-0 


2.22 


2.27 


2.32 


2.37 


2.42 


2.47 


2.52 


2.57 


2.02 2.67 


2.72 


2.77 


2.82 


32.0 


2.29 


2.34 


2.39 


2.44 


2.50 


2.55 2.60 


2.65 


2.70 2.76 

i 


2.81 


286 


2.91 


33.0 


2.36 


2.41 


247 


2.52 


2.57 


2.63 


2.68 


2.73 


2.79 


284 


2.89 


2.951 


3.00 


34.0 


2.43 


2.48 


2.54 


2.60 


2.65 


271 


2.76 


2.82 


2.87 


2.93 


2.98 


3.04 1 3.09 


35.0 


2.50 


2.55 


2.61 

1 


2.67! 


2.73 


2.78 


2.84 


2.90 


2.96 


3^oi 


3^07 


3-13 i 3^i8 

1 



Rmithsonian "^able* 



100 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE. THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE B.\ROMETER 


HEIGHT OF THE BAROMETER | 






560 mm. 






570 mm. 




i Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


1 0" 


O.OO 


0.02 


0.04 


0.05 


0.07 


0.00 


0.02 


0.04 


0.06 


0.07 


I 


.09 


.11 


•13 


•15 


.16 


.09 


.11 


•13 


•15 


.17 


2 


.18 


.20 


.22 


.24 


.26 


•19 


.20 


.22 


.24 


.26 


3 


•27 


•29 


•31 


•33 


•35 


.28 


•30 


•32 


•34 


•35 


4 


•37 


•38 


.40 


.42 


•44 


•37 


•39 


.41 


•43 


•45 


5 


0.46 


0.48 


0.49 


0.51 


0.53 


0.47 


0.48 


0.50 


0.52 


0.54 


6 


•55 


• 57 


.58 


.60 


.62 


•56 


•58 


.60 


.61 


•63 


7 


.64 


.66 


.68 


.69 


•71 


.65 


.67 


.69 


.71 


•73 


8 


•73 


• 75 


•77 


•79 


.80 


•74 


.76 


.78 


.80 


.82 


9 


.82 


.84 


.86 


.88 


.90 


.84 


.86 


•87 


.89 


.91 


10 


0.91 


0.93 


o^95 


0.97 


0.99 


0-93 


0-95 


0.97 


0.99 


1.00 


II 


1. 00 


1.02 


1.04 


1.06 


1.08 


1.02 


1.04 


1.06 


1.08 


1. 10 


12 


1. 10 


I. II 


I-I3 


I^i5 


1. 17 


1. 12 


^•I3 


I-I5 


1.17 


1. 19 


13 


1. 19 


1.20 


1.22 


1.24 


1.26 


1,21 


1.23 


1^25 


1.26 


1.28 


14 


1.28 


1.30 


I-3I 


1^33 


1-35 


1.30 


1.32 


1-34 


i^36 


1-37 


15 


1^37 


^•39 


1.41 


1.42 


1.44 


1-39 


1.41 


1^43 


1-45 


1.47 


i6 


1.46 


1.48 


1.50 


i^5i 


^•53 


1.49 


1.50 


1-52 


1^54 


1.56 


17 


i^55 


1^57 


1-59 


1. 61 


1.62 


1.58 


1.60 


1.62 


1.63 


1.65 


iS 


1.64 


1.66 


1.68 


1.70 


1. 71 


1.67 


1.69 


1. 71 


1.73 


1-75 


19 


1^73 


1-75 


1-77 


1.79 


1. 81 


1.76 


1.78 


1.80 


1.82 


1.84 


20 


1.82 


1.84 


1.86 


1. 88 


1.90 


1.86 


1.87 


1.89 


1.91 


1^93 


21 


1.91 


^•93 


^•95 


1.97 


1.99 


1-95 


1.97 


1.99 


2.00 


2.02 


22 


2.01 


2.02 


2.04 


2.06 


2.08 


2.04 


2.06 


2.08 


2.10 


2. 1 1 


23 


2.10 


2. II 


2.13 


2.15 


2.17 


2.13 


2.15 


2.17 


2.19 


2.21 


24 


2.19 


2.20 


2.22 


2.24 


2.26 


2.23 


2.24 


2.26 


2.28 


2.30 


25 


2.28 


2.30 


2.31 


2.33 


2-35 


2.32 


2.34 


2-35 


2.37 


2.39 


26 


2.37 


2.39 


2.40 


2.42 


2.44 


2.41 


2.43 


2.45 


247 


2.48 


27 


2.46 


2.48 


2.49 


2.51 


2.53 


2.50 


2.52 


2.54 


2.56 


2.58 


28 


2^55 


2.57 


2^59 


2.60 


2.62 


2-59 


2.61 


2.63 


2.65 


2.67 


29 


2.64 


2.66 


2.68 


2.69 


2.71 


2.69 


2.71 


2.72 


2.74 


2.76 


30 


2.73 


2.75 


2.77 


2.78 


2.80 


2.78 


2.80 


2.82 


2.83 


2.85 


31 


2.82 


2.84 


2.86 


2.87 


2.89 


2.87 


2.89 


2.91 


2-93 


2.94 


32 


2.91 


2.93 


2-95 


2.97 


2.98 


2.96 


2.98 


3.00 


3.02 


3-04 


33 


3.00 


3.02 


3^04 


3.06 


3^o7 


3.06 


3-07 


3^09 


3^ii 


3^13 


34 


3-09 


3-II 


3^13 


3-15 


3^16 


3-15 


3-17 


3-i8 


3.20 


3.22 


35 


3-18 


3.20 


3.22 


3^24 


3-25 


3.2s 


3-26 


3.28 


3^29 


3^31 



Imitmsonian Tables. 



lOI 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OP THE BAROMETER 


HEIGHT OF THE BAROMETER 






580 mm. 






590 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















c 


mill. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


0.00 


0.02 


0.04 


0.06 


0.08 


0.00 


0.02 


0.04 


0.06 


0.08 


I 


.09 


.11 


•13 


.15 


•17 


.10 


.12 


.13 


•15 


•17 


2 


.19 


.21 


•23 


•25 


.27 


.19 


.21 


•23 


•25 


.27 


3 


.28 


•30 


•32 


.34 


•36 


.29 


•31 


.33 


•35 


.37 


4 


.3S 


.40 


.42 


•44 


•45 


•39 


.40 


.42 


■44 


.46 


5 


0.47 


0.49 


0.51 


0.53 


0.55 


0.48 


0.50 


0.52 


0.54 


0.56 


6 


•57 


•59 


.61 


.62 


.64 


.58 


.60 


.62 


.64 


•65 


7 


.66 


.68 


.70 


.72 


.74 


•67 


.69 


.71 


•73 


• 75 


8 


.76 


.78 


•79 


.81 


.83 


• 77 


•79 


.81 


•83 


.85 


9 


.85 


• 87 


.89 


•91 


•93 


.87 


.89 


.90 


.92 


•94 


10 


0.95 


0.96 


0.98 


I. GO 


1.02 


0.96 


0.98 


I. GO 


1.02 


1.04 


II 


1.04 


1.06 


1.08 


1. 10 


1. 12 


1.06 


1.08 


1. 10 


1. 12 


1.14 


12 


I-I3 


I-I5 


1. 17 


I.I9 


1. 21 


I-I5 


1. 17 


1. 19 


1. 21 


1.23 


13 


1.23 


1.25 


1.27 


1.29 


1.30 


1.25 


1.27 


1.29 


i^3i 


1-33 


14 


1.32 


1-34 


1.36 


1.38 


1.40 


1-35 


1-37 


1.38 


1.40 


1.42 


15 


1.42 


1.44 


1.46 


1.47 


1.49 


X.44 


1.46 


1.48 


1.50 


1-52 


i6 


1-5 1 


1-53 


1^55 


1^57 


1-59 


1-54 


1.56 


i^58 


1.60 


1. 61 


17 


1. 61 


1.62 


1.64 


1.66 


1.68 


1.63 


1.65 


1.67 


1.69 


1. 71 


iS 


1.70 


1.72 


1.74 


1.76 


1.78 


1-73 


1^75 


1.77 


1.79 


1. 81 


19 


1.79 


1. 81 


1.83 


i^85 


1.87 


1.83 


1.84 


1.86 


1.88 


1.90 


20 


1.89 


1.91 


1-93 


1^95 


1.96 


1.92 


1.94 


1.96 


1.98 


2.00 


21 


1.98 


2.00 


2.02 


2.04 


2.06 


2.02 


2.04 


2.06 


2.07 


2.09 


22 


2.08 


2.10 


2. II 


2.13 


2-15 


2. II 


2.13 


2.15 


2.17 


2.19 


23 


2.17 


2.19 


2.21 


2.23 


2.25 


2.21 


2.23 


2.25 


2.27 


2.28 


24 


2.26 


2.28 


2.30 


2.32 


2.34 


2.30 


2.32 


2.34 


2.36 


2.38 


25 


2.36 


2.38 


2.40 


2.41 


2.43 


2.40 


2.42 


2.44 


2.46 


2.48 


26 


2-45 


2.47 


2.49 


2.51 


2.53 


2.49 


2.51 


2.53 


2.55 


2.57 


27 


2-55 


2-57 


2.58 


2.60 


2.62 


2.59 


2.61 


2.63 


2.65 


2.67 


28 


2.64 


2.66 


2.68 


2.70 


2.72 


2.69 


2.70 


2.72 


2.74 


2.76 


29 


2.73 


2.75 


2.77 


2.79 


2.81 


2.78 


2.80 


2.82 


2.84 


2.86 


30 


2.83 


2.S5 


2.87 


2.88 


2.90 


2.SS 


2.90 


2.91 


2-93 


2.95 


31 


2.92 


2.94 


2.96 


2. 98 


3.00 


2.97 


2.99 


3.01 


3-03 


3-05 


32 


3.02 


3-03 


3^05 


3-07 


3-09 


3-07 


3-09 


3-II 


3.12 


3-14 


33 


3.11 


3-13 


3-15 


3-i6 


3.18 


3-16 


3. IS 


3.20 


3.22 


3-24 


34 


3.20 


3.22 


3-24 


3-26 


3.2S 


3-26 


3. 28 


3-30 


3-31 


3-33 


35 


3-30 


3-31 


3-33 


3-35 


3-37 


3-35 


3^37 


3.39 


3-41 


3-43 

1 



filMTHSONIAN TABLE*. 



102 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 


° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 




HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 






600 mm. 






605 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















c. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 1 


0° 


O.OO 


0.02 


0.04 


0.06 


0.08 


0.00 


0.02 


0.04 


0.06 


0.08 


I 


.lo 


.12 


.14 


.16 


.18 


.10 


.12 


.14 


.16 


.18 


2 


.20 


.22 


.24 


•25 


•27 


.20 


.22 


•24 


.26 


.28 


3 


.29 


•31 


■33 


•35 


•37 


•30 


•32 


•34 


.36 


•38 


4 


•39 


.41 


•43 


•45 


•47 


.40 


.41 


•43 


•45 


•47 


5 


0.49 


0.51 


0.53 


0.55 


o^57 


0.49 


0.51 


0.53 


0.55 


0.57 


6 


•59 


.61 


•63 


•65 


• 67 


•59 


.61 


•63 


.65 


.67 


7 


.69 


.70 


• 72 


•74 


.76 


.69 


•71 


•73 


•75 


• 77 


8 


.78 


.80 


.82 


.84 


.86 


•79 


.81 


•83 


• 85 


• 87 


9 


.88 


.90 


.92 


•94 


.96 


.89 


.91 


•93 


•95 


•97 


10 


0.98 


1. 00 


1.02 


1.04 


1.06 


0.99 


1. 01 


1.03 


1.05 


1.07 


II 


1.08 


1. 10 


1. 12 


^•13 


I-I5 


1.09 


I. ID 


1. 12 


1. 14 


1. 16 


12 


1. 17 


1. 19 


1. 21 


1.23 


1^25 


1. 18 


1.20 


1.22 


1.24 


1.26 


1.5 


1.27 


1.29 


I-3I 


^•33 


1^35 


1.28 


1.30 


1.32 


1^34 


1.36 


14 


1-37 


1-39 


1.41 


1-43 


1^45 


1.38 


1.40 


1.42 


1.44 


1.46 


15 


1.47 


1.49 


1.51 


1^53 


1.54 


1.4S 


1.50 


1-52 


1-54 


1.56 


i6 


1.56 


1.5B 


1.60 


1.62 


1.64 


i^58 


1.60 


1.62 


1.64 


1.66 


17 


1.66 


1.68 


1.70 


1.72 


1.74 


1.68 


1.70 


1. 71 


1-73 


1-75 


i8 


1.76 


1.78 


1.80 


1.82 


1.84 


1-77 


1.79 


1. 81 


1.83 


1.85 


19 


1.86 


1.88 


1.90 


1.91 


1-93 


1.87 


1.89 


1. 91 


1^93 


1^95 


20 


1-95 


1.97 


1.99 


2.01 


2.03 


1.97 


1.99 


2.01 


2.03 


2.05 


21 


2.05 


2.07 


2.09 


2. 1 1 


2.13 


2.07 


2.09 


2. 1 1 


2.13 


2.15 


22 


2.15 


2.17 


2.19 


2.21 


2.23 


2.17 


2.19 


2.21 


2.23 


2.24 


23 


2.25 


2.26 


2.28 


2.30 


2.32 


2.26 


2.28 


2.30 


2.32 


2.34 


24 


2.34 


2.36 


2.38 


2.40 


2.42 


2.36 


2.38 


2.40 


2.42 


2.44 


25 


2.44 


2.46 


2.48 


2.50 


2.52 


2.46 


2.48 


2.50 


2.52 


2.54 


26 


2.54 


2.56 


2.58 


2.60 


2.61 


2.56 


2.58 


2.60 


2.62 


2.64 


27 


2.63 


2.65 


2.67 


2.69 


2.71 


2.66 


2.68 


2.70 


2.71 


2.73 


28 


2.73 


2.75 


2.77 


2.79 


2.81 


2.75 


2.77 


2.79 


2.S1 


2.83 


29 


2.83 


2.85 


2.87 


2.89 


2.91 


2.85 


2.87 


2.89 


2.91 


2.93 


30 


2.93 


2.94 


2.96 


2.98 


3.00 


2.95 


2.97 


2.99 


3^oi 


3-03 


31 


3.02 


3-04 


3.06 


3.08 


3.10 


3-05 


3^07 


3^09 


3^ii 


3^13 


32 


3.12 


3-14 


3^16 


3^i8 


3.20 


3-15 


3^i6 


3.18 


3.20 


3.22 


33 


3.22 


3-24 


3-25 


3-27 


3^29 


3^24 


3-26 


3^28 


3^3o 


3^32 


34 


3-31 


3-33 


3-35 


3-37 


3-39 


3^34 


3^36 


3^38 


3^40 


3^42 


35 


3-41 


3.43 


3^45 


3-47 


3^49 


3^44 


3-46 


3^48 


3^50 


3^52 



Smithsonian Tab> >== 



103 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 






610 mm. 






615 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm.. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0" 


O.OO 


0.02 


0.04 


0.06 


0.08 


0.00 


0.02 


0.04 


0.06 


0.08 


I 


.ID 


.12 


.14 


.16 


.18 


.10 


.12 


.14 


.16 


.18 


2 


.20 


.22 


.24 


.26 


.28 


.20 


.22 


.24 


.26 


.28 


3 


•30 


•32 


•34 


•36 


.38 


•30 


•32 


•34 


•36 


•38 


4 


.40 


.42 


•44 


.46 


.48 


.40 


.42 


.44 


.46 


.48 


5 


0.50 


0.52 


0.54 


0.56 


0.58 


0.50 


0.52 


0.54 


0.56 


0.58 


6 


.60 


.62 


.64 


.66 


.68 


.60 


.62 


.64 


.66 


.68 


7 


.70 


.72 


• 74 


• 76 


• 78 


.70 


•72 


.74 


.76 


.78 


8 


.80 


.82 


.84 


.86 


.88 


.80 


.82 


.84 


.86 


.88 


9 


.90 


.92 


•94 


.96 


•98 


.90 


.92 


•94 


.96 


.98 


10 


0.99 


1. 01 


1.03 


1.05 


1.07 


1. 00 


1.02 


1.04 


1.06 


1.08 


II 


1.09 


I. II 


1^13 


i^i5 


1. 17 


1. 10 


1. 12 


1. 14 


1. 16 


1. 18 


12 


1. 19 


1. 21 


1.23 


1-25 


1.27 


1.20 


1.22 


1.24 


1.26 


1.28 


13 


1.29 


I-3I 


1^33 


1.35 


f-37 


1.30 


1.32 


1-34 


i^36 


1.38 


14 


1-39 


I.4I 


1^43 


1-45 


1.47 


1.40 


1.42 


1.44 


1.46 


1.48 


IS 


1.49 


I-5I 


1-53 


i^55 


1-57 


1.50 


1-52 


1-54 


1.56 


i^58 


i6 


1-59 


1. 61 


1.63 


i^65 


1.67 


1.60 


1.62 


1.64 


1.66 


1.68 


17 


1.69 


1. 71 


1^73 


1-75 


1.77 


1.70 


1.72 


1.74 


1.76 


1.78 


i8 


1.79 


1. 81 


1.83 


1.85 


1.S7 


1.80 


1.82 


1.84 


1.86 


1.S8 


19 


1.89 


1.91 


1-93 


i^95 


1.97 


1.90 


1.92 


1.94 


1.96 


1.98 


20 


1.99 


2.01 


2.03 


2.05 


2.07 


2.00 


2.02 


2.04 


2.06 


2.08 


21 


2.09 


2.10 


2.12 


2.14 


2.16 


2.10 


2.12 


2.14 


2.16 


2.18 


22 


2.18 


2.20 


2.22 


2.24 


2.26 


2.20 


2.22 


2.24 


2.26 


2.28 


23 


2.28 


2.30 


2.32 


2.34 


2.36 


2.30 


2.32 


2.34 


2.36 


2.38 


24 


2.38 


2.40 


2.42 


2.44 


2.46 


2.40 


2.42 


2.44 


2.46 


2.48 


25 


2.48 


2.50 


2.52 


2.54 


2.56 


2.50 


2.52 


2-54 


2.56 


2.58 


26 


2.58 


2.60 


2.62 


2.64 


2.66 


2.60 


2.62 


2.64 


2.66 


2.68 


27 


2.68 


2.70 


2.72 


2.74 


2.76 


2.70 


2.72 


2.74 


2.76 


2.78 


28 


2.78 


2.80 


2.82 


2.84 


2.86 


2.80 


2.82 


2.84 


2.86 


2.88 


29 


2.88 


2.90 


2.91 


2.93 


2-95 


2.90 


2.92 


2.94 


2.96 


2.98 


30 


2.97 


2.99 


3.01 


3-03 


3-05 


3.00 


3.02 


3-04 


3.06 


3.08 


31 


3-07 


3-09 


3-II 


3-13 


3-15 


3.10 


3.12 


3-14 


3-i6 


3- 18 


32 


3-17 


3-19 


3.21 


3-23 


3-25 


3.20 


3.22 


3-24 


3.26 


3.28 1 


33 


3-27 


3-29 


3^31 


3^33 


3-35 


3-30 


3^32 


3-34 


3-36 


3-38 i 


34 


3-37 


3-39 


3-41 


3^43 


3-45 


3- 40 


3^42 


3^44 


3-46 


3-48 


35 


3-47 


3-49 


3-51 


3-53 


3-55 


3-49 


3-51 


3^53 


3^55 


3^57 



ImiThscnian Table*. 



104 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 


° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 




HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 






620 mm. 






625 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0°0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


O.OO 


0.02 


0.04 


0.06 


0.08 


0.00 


0.02 


0.04 


0.06 


0.08 


I 


.lO 


.12 


.14 


.16 


.18 


.10 


.12 


.14 


.16 


.18 


2 


.20 


.22 


.24 


.26 


.28 


.20 


.22 


•24 


.27 


.29 


3 


•30 


•32 


•34 


•36 


•38 


•31 


•33 


.35 


.37 


•39 


4 


.40 


•43 


•45 


.47 


•49 


.41 


•43 


•45 


•47 


.49 


5 


0.51 


0-53 


0.55 


0.57 


0.59 


0.51 


0.53 


0.55 


0.57 


o^59 


6 


.61 


•63 


•65 


.67 


.69 


.61 


•63 


.65 


.67 


.69 


7 


•71 


•73 


•75 


.77 


•79 


•71 


•73 


• 75 


•78 


.80 


8 


.81 


•83 


•85 


•87 


•89 


.82 


.84 


.86 


.88 


.90 


9 


•91 


•93 


•95 


.97 


•99 


•92 


.94 


.96 


.98 


I. GO 


10 


1. 01 


1.03 


1.05 


1.07 


1.09 


1.02 


1.04 


1.06 


1.08 


1. 10 


[I 


I. II 


^•I3 


i^i5 


1. 17 


1.19 


1. 12 


1. 14 


1. 16 


1. 18 


1.20 


12 


1. 21 


1.23 


1-25 


1.27 


1.29 


1.22 


1.24 


1.26 


1.28 


1.30 


13 


I-3I 


^•33 


1-35 


1-37 


^•39 


1.32 


1-34 


1^37 


1-39 


I.4I 


14 


I.4I 


1-43 


1.46 


1.48 


1.50 


1-43 


1^45 


1.47 


1.49 


I-5I 


15 


1.52 


i^54 


i^56 


1.58 


1.60 


1-53 


1-55 


1-57 


1-59 


1.61 


i6 


T.62 


1.64 


1.66 


1.68 


1.70 


1.63 


i^65 


1.67 


1.69 


1.71 


17 


1.72 


1-74 


1.76 


1.78 


1.80 


1-73 


i^75 


1.77 


1.79 


1.81 


i8 


1.82 


1.84 


1.86 


1.88 


1.90 


1^83 


1.85 


1.87 


1.89 


1.91 


19 


1.92 


1.94 


1.96 


1.98 


2.00 


1-93 


1-95 


1.97 


1.99 


2.01 


20 


2.02 


2.04 


2.06 


2.08 


2.10 


2.04 


2.06 


2.08 


2.10 


2.12 


21 


2.12 


2.14 


2.16 


2.18 


2.20 


2.14 


2.16 


2.18 


2.20 


2.22 


22 


2.22 


2.24 


2.26 


2.28 


2.30 


2.24 


2.26 


2.28 


2.30 


2.32 


23 


2.32 


2.34 


2.36 


2.38 


2.40 


2.34 


2.36 


2.38 


2.40 


2.42 


24 


2.42 


2.44 


2.46 


2.48 


2.50 


2.44 


2.46 


2.48 


2.50 


2.52 


25 


2.52 


2-54 


2.56 


2.58 


2.60 


2-54 


2.56 


2.58 


2.60 


2.62 


26 


2.62 


2.64 


2.66 


2.6S 


2.70 


2.64 


2.66 


2.68 


2.70 


2.72 


27 


2.72 


2.74 


2.76 


2.78 


2.80 


2.74 


2.76 


2.78 


2.80 


2.82 


28 


2.82 


2.84 


2.86 


2.88 


2.90 


2.85 


2.87 


2.89 


2.91 


2-93 


29 


2.92 


2.94 


2.96 


2.98 


3.00 


2.95 


2.97 


2.99 


3-OI 


3^03 


30 


3.02 


3-04 


3.06 


3.08 


3.10 


3^05 


3-07 


3-09 


311 


3-13 


31 


3.12 


3-14 


3- 16 


3.18 


3.20 


3-15 


3-17 


3-19 


3.21 


3-23 


32 


3.22 


3-24 


3.26 


3-28 


3-30 


3-25 


3-27 


3-29 


3-31 


3-33 


33 


3-32 


3-34 


3-36 


3-38 


3-40 


3-35 


3-37 


3-39 


3-41 


3-43 


34 


3-42 


3-44 


3-46 


3-48 


3-50 


3-45 


3-47 


3-49 


3-51 


3-53 


35 


3-52 


3-54 


3-56 


3-58 


3.60 


3^55 


3^57 


3-59 


3-61 


3-63 



Smithsonian Table*. 



105 



Table 46. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE. THE CORRECTION IS TO BE SUBTRACTED 





HEIGHT OP THE BAROMETER 


IIEICyiT OF THE BAKO.METER 






630 mm. 






635 mm. 


1 

. f 


Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


tarn. 


mm. 


0° 


0.00 


0.02 


0.04 


0.06 


0.08 


0.00 


0.02 


0.04 


0.06 


0.08 


I 


.10 


.12 


.14 


.16 


.19 


.10 


.12 


•15 


•17 


•19 


2 


.21 


.23 


•25 


•27 


.29 


.21 


•23 


•25 


•27 


.29 


3 


•31 


.33 


•35 


•37 


•39 


•31 


•33 


•35 


•37 


•39 


4 


.41 


.43 


.45 


•47 


•49 


.41 


•44 


.46 


.48 


•50 


5 


0.51 


0.53 


0.56 


0.58 


0.60 


0.52 


0.54 


0.56 


0.58 


0.60 


6 


.62 


.64 


.66 


.68 


.70 


.62 


.64 


.66 


.68 


.70 


7 


.72 


.74 


• 76 


.78 


.80 


•73 


•75 


.77 


•79 


.81 


8 


.82 


.84 


.86 


.88 


.90 


•83 


•85 


.87 


.89 


.91 


9 


.92 


•95 


•97 


•99 


1. 01 


•93 


•95 


.97 


•99 


1.02 


10 


1.03 


1.05 


1.07 


1.09 


I. II 


1.04 


1.06 


1.08 


I. ID 


1. 12 


II 


I-I3 


I-I5 


1. 17 


1. 19 


1. 21 


1. 14 


1. 16 


1.18 


1.20 


1.22 


12 


1.23 


1-25 


1.27 


1.29 


i^3i 


1.24 


1.26 


1.28 


1.30 


1^33 


13 


1-34 


1.36 


1.38 


1.40 


1.42 


1^35 


1.37 


1^39 


I.4I 


1.43 


14 


1.44 


1.46 


1.48 


1.50 


1-52 


1-45 


1-47 


1.49 


I.5I 


i^53 


15 


1.54 


1.56 


1.58 


1.60 


1.62 


1^55 


1^57 


1^59 


I.61 


1.63 


i6 


1.64 


1.66 


1.68 


1.70 


1.72 


1.66 


1.68 


1.70 


1.72 


1.74 


17 


1.74 


1.77 


1.79 


1.81 


1.83 


1.76 


1.78 


1.80 


1.82 


1.84 


i8 


1.85 


1.87 


1.89 


1. 91 


1-93 


1.86 


1.88 


1.90 


1.92 


1.94 


19 


1-95 


1.97 


1.99 


2.01 


2.03 


1.96 


1.99 


2.01 


2.03 


2.05 


20 


2.05 


2.07 


2.09 


2. 1 1 


2.13 


2.07 


2.09 


2.11 


2.13 


2.15 


21 


2.15 


2.17 


2.19 


2.21 


2.24 


2.17 


2.19 


2.21 


2.23 


2.25 


22 


2.26 


2.28 


2.30 


2.32 


2.34 


2.27 


2.29 


2.31 


2.34 


2.36 


23 


2.36 


2.38 


2.40 


2.42 


2.44 


2.38 


2.40 


2.42 


2.44 


2.46 


24 


2.46 


2.48 


2.50 


2.52 


2.54 


2.48 


2.50 


2.52 


2.54 


2.56 


25 


2.56 


2.58 


2.60 


2.62 


2.64 


2.58 


2.60 


2.62 


2.64 


2.66 


26 


2.66 


2.68 


2.70 


2.73 


2.75 


2.69 


2.71 


2.73 


2.75 


2.77 


27 


2.77 


2.79 


2.81 


2.83 


2.85 


2.79 


2.81 


2.83 


2.85 


2.87 


28 


2.87 


2.89 


2.91 


2.93 


2.95 


2.89 


2.91 


2.93 


2.95 


2.97 


29 


2.97 


2.99 


3.01 


3-03 


3-05 


2.99 


3.01 


3^03 


3^05 


3^o8 


30 


3-07 


3-09 


3-II 


3^13 


3-15 


3.10 


3.12 


3^14 


3-16 


3^i8 


31 


3-17 


3-19 


3-21 


3-23 


3-25 


3.20 


3.22 


3-24 


3.26 


3^iS 


32 


3.28 


3-30 


3-32 


3-34 


3-36 


3^30 


3-32 


3-34 


3.36 


3^38 


33 


3.38 


3- 40 


3^42 


3-44 


3-46 


3-40 


3-42 


3^44 


3-47 


3.49 


34 


3-48 


3- 50 


3-52 


3-54 


3-56 


3-51 


3-53 


3-55 


3-57 


3-59 


35 


3.58 


3.60 


3.62 


3-64 


3.66 


3^6i 


3-63 


3-65 


3-67 


3-69 



bMiiH6()NiAN Table*. 



106 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 








640 mm. 






645 mm. 






Attached 
























Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 




mometer. 
























C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0° 


O.OO 


0.02 


0.04 


0.06 


0.08 


0.00 


0.02 


0.04 


0.06 


0.08 




I 


.ID 


•13 


•15 


•17 


.19 


.11 


•13 


•15 


•17 


•19 




2 


.21 


•23 


•25 


•27 


.29 


.21 


•23 


•25 


•27 


•29 




3 


•31 


•33 


•36 


.38 


.40 


•32 


•34 


•36 


•38 


.40 




4 


.42 


.44 


.46 


.48 


•50 


.42 


•44 


.46 


.48 


•51 




5 


0.52 


0.54 


0.56 


0.59 


0.61 


0.53 


0.55 


0.57 


o^59 


0.61 




6 


.63 


.65 


.67 


.69 


.71 


•63 


•65 


.67 


.69 


.72 




7 


•73 


•75 


• 77 


.79 


.81 


•74 


.76 


•78 


.80 


.82 




8 


.84 


.86 


.88 


.90 


.92 


.84 


,86 


.88 


.90 


•93 




9 


•94 


.96 


.98 


1.00 


1.02 


•95 


•97 


■99 


1. 01 


1.03 




10 


1.04 


1.06 


1.09 


I. II 


I^i3 


1.05 


1.07 


1.09 


1. 12 


1. 14 




II 


I^i5 


1. 17 


1. 19 


1. 21 


1.23 


1.16 


1.18 


1.20 


1.22 


1.24 




12 


I^25 


1.27 


1.29 


^•31 


1^34 


1.26 


I. 28 


1.30 


1.32 


^•35 




13 


1^36 


1.38 


1.40 


1.42 


1.44 


1-37 


1^39 


1.41 


1-43 


1-45 




14 


1.46 


1.48 


1.50 


1-52 


1-54 


1.47 


1.49 


I-5I 


1^53 


1.56 




15 


i^56 


1-59 


1. 61 


1.63 


1.65 


1.58 


1.60 


1.62 


1.64 


1.66 




i6 


1.67 


1.69 


1. 71 


1^73 


1-75 


1.68 


1.70 


1.72 


1.74 


1.77 




17 


1.77 


1.79 


1. 81 


1.83 


1.86 


1.79 


1. 81 


i^83 


1.85 


1.87 




i8 


1.88 


1.90 


1.92 


1.94 


1.96 


1.89 


1. 91 


1-93 


1^95 


1.97 




19 


1.98 


2. GO 


2.02 


2.04 


2.06 


2.00 


2.02 


2.04 


2.06 


2.08 




20 


2.08 


2.10 


2.13 


2.15 


2.17 


2.10 


2.12 


2.14 


2.16 


2.18 




21 


2.19 


2.21 


2.23 


2.25 


2.27 


2.20 


2.23 


2.25 


2.27 


2.29 




22 


2.29 


2.31 


2.33 


2.35 


2.37 


2.31 


2.33 


2-35 


2.37 


2-39 




23 


2.40 


2.42 


2.44 


2.46 


2.48 


2.41 


2.43 


2.46 


2.48 


2.50 




24 


2.50 


2.52 


2.54 


2.56 


2.58 


2.52 


2.54 


2.56 


2.58 


2.60 




25 


2.60 


2.62 


2.64 


2.66 


2.69 


2.62 


2.64 


2.66 


2.69 


2.71 




26 


2.71 


2.73 


2.75 


2.77 


2.79 


2.73 


2.75 


2.77 


2.79 


2.81 




27 


2.81 


2.83 


2.85 


2.87 


2.89 


2^83 


2.85 


2.87 


2.89 


2.92 




28 


2.91 


2.93 


2.95 


2.98 


3.00 


2.94 


2.96 


2.98 


3.00 


3.02 




29 


3.02 


3-04 


3.06 


3.08 


3.10 


3-04 


3.06 


3.08 


3.10 


3.12 




30 


3.12 


3-14 


3-i6 


3- 18 


3.20 


3^14 


3^17 


3-19 


3.21 


3^23 




31 


3.22 


3^24 


3^27 


3-29 


3-3'!- 


3^25 


3-27 


3^29 


3^31 


3^33 




32 


3-33 


3^35 


3^37 


3^39 


3-41 


3^35 


3-37 


3-39 


3^42 


3-44 




33 


3-43 


3-45 


3-47 


3-49 


3^5i 


3-46 


3-48 


3^50 


3^52 


3-54 




34 


3-53 


3-55 


3-58 


3 t)0 


3^62 


3^56 


3^58 


3.60 


3.62 


3^64 




35 


3-64 


3-66 


3^68 


3^7o 


3^72 


3-67 


3-69 


3^7i 


3^73 


3^75 





Smithsonian Tables. 
13 



107 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HKIGHT OF THE BAROMF.TKR 


lIKrnUT OF THE nARO:\rETER 




1 




650 mm. 






655 mm. 






Attached 
























Ther- 


0°0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 




mometer. 
























C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0" 


O.CX) 


0.02 


0.04 


0.06 


0.08 


0.00 


0.02 


0.04 


0.06 


0.09 




I 


.11 


•13 


•15 


•17 


•19 


.11 


•13 


•15 


•17 


•19 




2 


.21 


.23 


•25 


.28 


•30 


.21 


•24 


.26 


.28 


•30 




3 


•32 


.34 


•36 


•38 


.40 


•32 


•34 


.36 


.39 


.41 




4 


•42 


-45 


.47 


•49 


.51 


•43 


•45 


.47 


.49 


•51 




5 


0.53 


0.55 


0.57 


0.59 


0.62 


o^53 


0.56 


0.58 


0.60 


0.62 




6 


.64 


.66 


.68 


.70 


• 72 


.64 


.66 


.68 


•71 


•73 




7 


• 74 


• 76 


■78 


.81 


•83 


•75 


.77 


•79 


.81 


.83 




8 


• 85 


.87 


.89 


•91 


•93 


•85 


.88 


.90 


.92 


•94 




9 


•95 


.98 


I.OO 


1.02 


1.04 


.96 


•98 


I.OO 


1,03 


1.05 




10 


1.06 


1.08 


1. 10 


1. 12 


1. 14 


1.07 


1.09 


I. II 


I- 13 


^•15 




II 


1.17 


1. 19 


1. 21 


1.23 


1^25 


1. 17 


1.20 


1.22 


1.24 


1.26 




12 


1.27 


1.29 


i^3i 


^•34 


1.36 


1.28 


1.30 


1.32 


1^35 


1^37 




13 


1.38 


1.40 


1.42 


1.44 


1.46 


1^39 


1.41 


1^43 


1.45 


1.47 




14 


1.48 


1.50 


1^53 


1^55 


1^57 


1.49 


1.52 


1^54 


1.56 


1^58 




15 


^•59 


1.61 


1.63 


1.65 


1.67 


1.60 


1.62 


1.64 


1.66 


1.69 




i6 


1.69 


1.72 


1.74 


1.76 


1. 78 


1. 71 


1.73 


1-75 


1.77 


1.79 




17 


1.80 


1.82 


1.84 


1.86 


1.88 


1. 81 


1.84 


1.86 


1.88 


1.90 




i8 


1. 91 


1^93 


^•95 


1.97 


1.99 


1.92 


1.94 


1.96 


1.98 


2. or 




19 


2.01 


2.03 


2.05 


2.07 


2.10 


2.03 


2.05 


2.07 


2.09 


2. 1 1 




20 


2.12 


2.14 


2.16 


2.18 


2.20 


2.13 


2.15 


2.18 


2.20 


2.22 




21 


2.22 


2.24 


2.26 


2.29 


2.31 


2.24 


2.26 


2.28 


2.30 


2.32 




22 


2^33 


2.35 


2.37 


2-39 


2.41 


2-35 


2.37 


2.39 


2.41 


2.43 




23 


2.43 


2.45 


2.47 


2.50 


2.52 


2.45 


2.47 


2.49 


2.52 


2.54 




24 


2-54 


2.56 


2.58 


2.60 


2.62 


2.56 


2.58 


2.60 


2.62 


2.64 




25 


2.64 


2.66 


2.69 


2.71 


2.73 


2.66 


2.68 


2.71 


2.73 


2.75 




26 


2.75 


2.77 


2.79 


2.81 


2.83 


2.77 


2.79 


2.81 


2.83 


2.85 




27 


2.85 


2.87 


2.90 


2.92 


2.94 


2.88 


2.90 


2.92 


2.94 


2.96 




28 


2.96 


2.98 


3.00 


3.02 


3-04 


2.98 


3.00 


3.02 


3.05 


3^o7 




29 


3.06 


3.0S 


3^ii 


3^13 


3-15 


3^09 


3^ii 


3^13 


3^15 


3^17 




30 


3-17 


3-19 


3.21 


323 


3^25 


3^19 


3.21 


3^24 


3^26 


3-28 




31 


3-27 


3^30 


3^32 


3^34 


3^36 


3^30 


3^32 


3^34 


3^36 


3^38 




32 


3^38 


3^40 


3^42 


3^44 


3-46 


3^41 


3^43 


3^45 


3^47 


3^49 




33 


3-48 


3-51 


3-53 


3^55 


3^57 


3-51 


3^53 


3^55 


3-57 


3.60 




34 


3-59 


3-61 


3-63 


3^65 


3^67 


3.62 


3^64 


3.^-6 


3-68 


3^70 




35 


3-69 


3^71 


3^74 


3^76 


3^78 


3^72 


3.74 


3^76 


3^79 


3^8i 





SMtTHSONiAN Table*. 



108 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 







HEIGHT OF THE BAROMETEK 


HEIGHT OF THE BAROMETER 










660 mm. 






665 mm. 








Attached 


























Ther. 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 






mometer. 


























C, 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 






0° 


0.00 


0.02 


0.04 


0.06 


0.09 


0.00 


0.02 


0.04 


0.07 


0.09 






t 


.11 


•13 


•15 


•17 


.19 


.11 


•13 


.15 


.17 


.20 






2 


.22 


•24 


.26 


.28 


•30 


.22 


•24 


.26 


.28 


•30 






3 


•32 


•34 


•37 


•39 


.41 


•33 


•35 


•37 


•39 


.41 






4 


•43 


•45 


•47 


•50 


•52 


•43 


.46 


.48 


•50 


•52 






5 


0.54 


0.56 


0.58 


0.60 


0.62 


0.54 


0.56 


0-59 


0.61 


0.63 






6 


.65 


.67 


.69 


• 71 


•73 


.65 


.67 


.69 


•72 


.74 






7 


■75 


.78 


.80 


.82 


.84 


.76 


•78 


.80 


.82 


.85 






8 


.86 


.88 


.90 


•93 


•95 


.87 


.89 


•91 


•93 


•95 






9 


•97 


•99 


1. 01 


1.03 


1.05 


.98 


1. 00 


1.02 


1.04 


1.06 






10 


1.08 


1. 10 


X.12 


1. 14 


1. 16 


i.oS 


I. II 


I- 13 


I-I5 


1. 17 






II 


1. 18 


1. 21 


1.23 


1-25 


1.27 


1.19 


1. 21 


1.24 


1.26 


1.28 






12 


1.29 


1^31 


1^33 


1.36 


1.38 


1.30 


1.32 


^•34 


1^37 


1-39 






13 


1.40 


1.42 


1.44 


1.46 


1.48 


1.41 


1^43 


1-45 


1.47 


1.50 






14 


^■5i 


1-53 


L55 


1^57 


^•59 


1.52 


1^54 


1.56 


1.58 


1.60 






15 


1.61 


1.63 


1.66 


1.68 


1.70 


1.63 


1.65 


1.67 


1.69 


1. 71 






i6 


1.72 


1.74 


1.76 


1.78 


1.81 


^•73 


1.76 


1.78 


1.80 


1.82 






17 


1.83 


1.85 


1.87 


1.89 


1.91 


1.84 


1.86 


1.88 


1. 91 


1.93 






i8 


1^93 


1.96 


1.98 


2.00 


2.02 


1^95 


1.97 


1.99 


2.01 


2.04 






19 


2.04 


2.06 


2.0S 


2. II 


2.13 


2.06 


2.08 


2.10 


2.12 


2.14 






20 


2.15 


2.17 


2.19 


2.21 


2.23 


2.17 


2.19 


2.21 


2.23 


2.25 






21 


2.26 


2.28 


2.30 


2.32 


2.34 


2.27 


2.29 


2.32 


2.34 


2.36 






22 


2.36 


2.38 


2.41 


2.43 


2.45 


2.38 


2.40 


2.42 


2.45 


2.47 






23 


2.47 


2.49 


2.51 


2.53 


2.56 


2.49 


2.51 


2.53 


2.55 


2.57 






24 


2.58 


2.60 


2.62 


2.64 


2.66 


2.60 


2.62 


2.64 


2.66 


2.68 






25 


2.68 


2.71 


2.73 


2.75 


2.77 


2.70 


2.73 


2.75 


2.77 


2.79 






26 


2.79 


2.81 


2.83 


2.85 


2.88 


2.81 


2.83 


2.85 


2.88 


2.90 






27 


2.90 


2.92 


2.94 


2.96 


2.98 


2.92 


2.94 


2.96 


2.98 


3.01 






28 


3.00 


3-03 


3-05 


3-07 


3-09 


3-03 


3-05 


3^07 


309 


3^ii 






29 


3-II 


3-13 


3^15 


3-18 


3.20 


3-13 


3- 16 


3-i8 


3.20 


3.22 






30 


3.22 


3-24 


3^26 


3-28 


330 


3-24 


3-26 


3^29 


3-3^ 


3^33 






31 


3-32 


3-35 


3-37 


3-39 


3-41 


3-35 


3-37 


3-39 


3-41 


3-44 






32 


3-43 


3-45 


3-47 


3-49 


352 


3-46 


3-48 


3^50 


3^52 


3-54 






33 


3^54 


356 


3^58 


3.60 


3-62 


3-56 


3^59 


3.61 


3^63 


3.65 






34 


3-64 


3-67 


3^69 


^•7i 


3^73 


3-67 


3^69 


3-71 


3.74 


3-76 






35 


3^75 


3^77 


3-79 


3-8i 


3-84 


3^78 


3.S0 


3.82 


3.84 


3.86 





Bmitheonian TABiEa. 



109 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0' 


' CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED 


. 






nEIGIIT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 








670 mm 


. 






675 mm 


. 






Attached 
























Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 




mometer. 
























C. 


:um. 


lum. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0° 


0.00 


0.02 


0.04 


0.07 


0.09 


0.00 


0.02 


0.04 


0.07 


0.09 




I 


.11 


•13 


•15 


.18 


.20 


.11 


•13 


.15 


.18 


,20 




2 


.22 


.24 


.26 


.28 


•31 


.22 


-24 


.26 


.29 


•31 




3 


•33 


•35 


•37 


•39 


.42 


•33 


•35 


•H 


.40 


.42 




4 


•44 


.46 


.48 


•50 


•53 


•44 


.46 


.48 


.51 


.53 




5 


0.55 


0.57 


0.59 


0.61 


0.63 


0.55 


0.57 


0.60 


0.62 


0.64 




6 


.66 


.68 


.70 


.72 


•74 


.66 


.68 


.71 


.73 


•75 




7 


• 77 


•79 


.81 


•83 


.85 


.77 


.79 


.82 


.84 


.86 




8 


.87 


.90 


•92 


.94 


.96 


.88 


.90 


•93 


•95 


.97 




9 


.98 


1. 01 


1.03 


1.05 


1.07 


.99 


I.OI 


1.04 


1.06 


1.08 




10 


1.09 


I. II 


1. 14 


1. 16 


1. 18 


1. 10 


1. 12 


1.14 


1.17 


1. 19 




II 


1.20 


1.22 


1-25 


1.27 


1.29 


1. 21 


1.23 


1.25 


1.28 


1.30 




12 


^•3i 


1^33 


i^35 


1.38 


1.40 


1.32 


i^34 


i^36 


1^39 


1.41 




13 


1.42 


1.44 


1.46 


1.49 


I-5I 


1-43 


1^45 


1.47 


1.50 


1-52 




14 


i^53 


^•55 


1-57 


1-59 


1.62 


1-54 


1.56 


i^58 


1. 61 


1.63 




15 


1.64 


1.66 


1.68 


1.70 


1.72 


1.65 


1.67 


1.69 


1.72 


1.74 




16 


^•75 


1.77 


1.79 


1.81 


1.83 


1.76 


1.78 


1.80 


i^83 


r.85 




17 


1.86 


1.88 


1.90 


l.t)2 


1.94 


1.87 


1.89 


1.91 


X.94 


1.96 




18 


1.96 


1.99 


2.01 


2.03 


2.05 


1.98 


2.00 


2.02 


2.04 


2.07 




19 


2.07 


2.09 


2.12 


2.14 


2.16 


2.09 


2. II 


2.13 


2^I5 


2.18 




20 


2.1S 


2.20 


2.23 


2.25 


2.27 


2.20 


2.22 


2.24 


2.26 


2.29 




21 


2.29 


2.31 


2-33 


2.36 


2.38 


2.31 


2^33 


2^35 


2.37 


2^39 




22 


2.40 


2.42 


2.44 


2.46 


2.49 


2.42 


2.44 


2.46 


2.48 


2.50 




23 


2.51 


2-53 


2.55 


2.57 


2.59 


2-53 


2^55 


2.57 


2^59 


2.61 




24 


2.62 


2.64 


2.66 


2.68 


2.70 


2.64 


2.66 


2.68 


2.70 


2.72 




25 


2.72 


2-75 


2.77 


2.79 


2.S1 


2.74 


2.77 


2.79 


2.81 


2.83 




26 


2.83 


2.85 


2.88 


2.90 


2.92 


2.85 


2.88 


2.90 


2.92 


2.94 




27 


2.94 


2.96 


2.98 


3.01 


3-03 


2.96 


2.99 


3.01 


303 


3-05 




28 


3^o5 


3^07 


3-09 


3-II 


3-14 


3-07 


3-09 


3-12 


3-14 


3.16 




29 


3^16 


3- 18 


3.20 


3.22 


3-24 


3^18 


3.20 


3.23 


325 


3-27 




30 


3^27 


3-29 


3-3^- 


3-33 


3-35 


3-29 


3^3i 


3-33 


3.36 


3-38 




31 


3-37 


3^40 


3^42 


3-44 


3-46 


3-40 


3^42 


3-44 


3-47 


3^49 




33 
33 


3^48 
3-59 


3^50 
3^61 


3-53 
3-^3 


3^55 
3.66 


3^57 
3.68 


3-51 
3.62 


3-53 
3^64 


3^55 
3.66 


3^57 
3-68 


3.60 
3^71 




34 


3-70 


3^72 


3^74 


3^76 


3-79 


3-73 


3-75 


3-77 


3^79 


3^8i 




35 


3^8i 


3-83 


3-85 


3-87 


3-89 


3-84 


3.86 


3^88 


3-90 


3^92 





Smithbonian Tables. 



IIO 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE. THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


1 

HEIGHT OF THE BAROMETER j 






680 mm. 






685 mm. 




Attached 






















Ther- 


0?0 


0?2 


0f4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


O.OO 


0.02 


0.04 


0.07 


0.09 


0.00 


0.02 


0.04 


0.07 


0.09 


I 


.11 


•13 


.16 


.18 


.20 


.11 


.13 


.16 


.18 


.20 


2 


.22 


•24 


.27 


•29 


•31 


.22 


.25 


.27 


.29 


•31 


3 


•33 


•36 


.38 


.40 


.42 


•34 


•36 


.38 


.40 


•43 


4 


•44 


•47 


•49 


•51 


•53 


• 45 


.47 


•49 


•51 


•54 


5 


0.56 


0.58 


0.60 


0.62 


0.64 


0.56 


0.58 


0.60 


0.63 


0.65 


6 


• 67 


.69 


.71 


•73 


• 75 


.67 


.69 


.72 


•74 


.76 


7 


.78 


.80 


.82 


.84 


.87 


.78 


.80 


.83 


•85 


.87 


8 


.89 


•91 


•93 


•95 


.98 


.89 


.92 


•94 


.96 


.98 


9 


I. GO 


1.02 


1.04 


1.06 


1.09 


1. 01 


1.03 


1.05 


1.07 


1.09 


10 


I. II 


I-I3 


i^i5 


1. 18 


1.20 


1. 12 


1. 14 


1. 16 


1.18 


1. 21 


II 


1.22 


1.24 


1.26 


1.29 


I-3I 


1.23 


1.25 


1.27 


1.30 


1.32 


12 


1-33 


1-35 


1-37 


1.40 


1.42 


1-34 


1.36 


1.38 


1.41 


1^43 


13 


1.44 


1.46 


1.49 


i^5i 


^•53 


1^45 


1.47 


1.50 


1.52 


1^54 


H 


1-55 


1-57 


1.60 


1.62 


1.64 


1^56 


^•59 


1.61 


1.63 


1.65 


15 


1.66 


1.68 


1. 71 


1.73 


1^75 


1.67 


1.70 


1.72 


1.74 


1.76 


i6 


1.77 


1.79 


1.82 


1.84 


1. 86 


1.79 


1.81 


1.83 


1.85 


1.87 


17 


1.88 


1.91 


1^93 


1-95 


1.97 


1.90 


1.92 


1.94 


1.96 


1.99 


i8 


1.99 


2.02 


2.04 


2.06 


2.08 


2.01 


2.03 


2.05 


2.07 


2.10 


19 


2.10 


2.13 


2.15 


2.17 


2.19 


2.12 


2.14 


2.16 


2.19 


2.21 


20 


2.21 


2.24 


2.26 


2.2S 


2.30 


2.23 


2.2s 


2.27 


2.30 


2.32 


21 


2.32 


2.35 


2^37 


2.39 


2.41 


2^34 


2^36 


2-39 


2.41 


2.43 


22 


2^43 


2.46 


2.48 


2.50 


2.52 


2^45 


2.47 


2.50 


2.52 


2^54 


23 


2^54 


2.57 


2.59 


2.61 


2.63 


2.56 


2^59 


2.61 


2.63 


2.65 


24 


2.66 


2.68 


2.70 


2.72 


2.74 


2.67 


2.70 


2.72 


2.74 


2.76 


25 


2.77 


2.79 


2.81 


2.83 


2.85 


2.79 


2.81 


2^83 


2.85 


2.87 


26 


2.88 


2.90 


2.92 


2.94 


2.96 


2.90 


2.92 


2.94 


2.96 


2.99 


27 


2.99 


3.01 


3-03 


3-05 


3^o7 


3.01 


3^03 


3-05 


3-07 


3.10 


28 


3.10 


3.12 


3^14 


3.16 


3^i8 


3.12 


3^14 


3.16 


3.18 


3.21 


29 


3.21 


3-23 


3-25 


3^27 


3^29 


3-23 


3-25 


3-27 


3^30 


3^32 


30 


3-32 


3-34 


3^36 


3^38 


3-40 


3^34 


3^36 


3^38 


3^41 


3^43 


31 


3-43 


3-45 


3-47 


3^49 


3-51 


3-45 


3^47 


3^49 


3-52 


3^54 


32 


3-54 


3.56 


3.58 


3.60 


3.62 


3^56 


3-58 


3-6i 


3-63 


3-65 


33 


3-'54 


3.67 


3^69 


3^71 


3-73 


3-67 


3^69 


3^72 


3^74 


3-76 


34 


3^75 


3.78 


3^8o 


3-82 


3.84 


3^78 


3.80 


3^83 


3-85 


3^87 


35 


3^86 


3-89 


3-91 


3^93 


3^95 


3-89 


3^91 


3-94 


3^96 


3^98 



Bmithsonian Tables. 



Ill 



Table 45. 

REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



rOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE Bvr.OMETEi: 


nEIGHT OF THE BAROMETER 






690 mm. 






695 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0' 


0.00 


0.02 


0.05 


0.07 


0.09 


0.00 


0.02 


0.05 


0.07 


0.09 


I 


.11 


.14 


.16 


.18 


.20 


.11 


.14 


.16 


.18 


.20 


2 


•23 


•25 


.27 


•29 


•32 


•23 


•25 


.27 


•30 


•32 


3 


•34 


•36 


•38 


.41 


•43 


•34 


.36 


•39 


.41 


•43 


4 


•45 


•47 


•50 


•52 


•54 


.45 


.48 


.50 


.52 


•54 


5 


0.56 


0.59 


0.61 


0.63 


0.65 


0.57 


o^59 


0.61 


0.64 


0.66 


6 


.68 


.70 


• 72 


• 74 


■11 


.68 


.70 


•73 


.75 


•77 


7 


•79 


.81 


•83 


.86 


.88 


•79 


.82 


.84 


.86 


.88 


8 


.90 


•92 


•95 


•97 


•99 


•91 


•93 


•95 


.98 


I.CX) 


9 


1. 01 


1.04 


1.06 


1.08 


1. 10 


1.02 


1.04 


1.07 


1.09 


I. II 


10 


^•13 


I-I5 


1. 17 


1. 19 


1.22 


1^13 


1. 16 


1. 18 


1.20 


1.22 


II 


1.24 


1.26 


1.28 


1^31 


1^33 


1.25 


1.27 


1.29 


I-3I 


1-34 


12 


i^35 


1.37 


1-39 


1.42 


1.44 


1.36 


i^38 


1.41 


1-43 


^•45 


13 


1.46 


1.48 


1-51 


1-53 


1-55 


1.47 


1.50 


1-52 


1-54 


1.56 


14 


1-57 


1.60 


1.62 


1.64 


1.66 


^•59 


1. 61 


1.63 


1.65 


1.68 


15 


1.69 


1. 71 


1-73 


1-75 


1.78 


1.70 


1.72 


1.74 


1.77 


1-79 


16 


1.80 


1.82 


1.84 


1.87 


1. 89 


1.81 


1.83 


1.86 


1.88 


1.90 


17 


1. 91 


1^93 


1.96 


1.98 


2.00 


1.92 


1^95 


1.97 


1.99 


2.01 


iS 


2.02 


2.05 


2.07 


2.09 


2. II 


2.04 


2.06 


2.08 


2. II 


2.13 


19 


2.13 


2.16 


2.18 


2.20 


2.22 


2.15 


2.17 


2.20 


2.22 


2.24 


20 


2.25 


2.27 


2.29 


2.31 


2.34 


2.26 


2.29 


2.31 


2-33 


2.35 


21 


2.36 


2.38 


2.40 


2.43 


2.45 


2.38 


2.40 


2.42 


2.44 


2^47 1 


22 


2.47 


2.49 


2.52 


2.54 


2.56 


2.49 


2.51 


2.53 


2.56 


2.5£ 1 


23 


2.58 


2.60 


2.63 


2.65 


2.67 


2.60 


2.62 


2.65 


2.67 


2.69 


24 


2.69 


2.72 


2.74 


2.76 


2.78 


2.71 


2.74 


2.76 


2.78 


2.80 


25 


2.81 


2.83 


2.85 


287 


2.90 


2.83 


2.85 


2.87 


2.89 


2.92 


26 


2.92 


2.94 


2.96 


2.99 


3.01 


2.94 


2.96 


2.98 


3.01 


3-03 


27 


3-03 


3-05 


3-07 


3.10 


3.12 


3-05 


3-07 


3.10 


3.12 


3^14 


28 


3-14 


3-16 


3-19 


3.21 


3-23 


3-16 


3-19 


3.21 


3^23 


3-25 


29 


3-25 


3-27 


3-30 


3-32 


3^34 


3^28 


3^30 


3-32 


3-34 


3^37 


30 


3.36 


3^39 


3-41 


3-43 


3-45 


3-39 


3^41 


3-43 


3-46 


3-48 


31 


3-48 


3-50 


3^52 


3-54 


3.56 


3-50 


3-52 


3-55 


3-57 


3-59 


32 


3-59 


3-61 


3^63 


3.65 


3.68 


3^61 


3-64 


3-66 


3^68 


3- 70 


33 


3-70 


3-72 


3^74 


Z-11 


3-79 


3^73 


3-75 


3^77 


3^79 


3^8i 


34 


3-81 


3.83 


3-85 


3.88 


3^90 


3-84 


3^86 


3^88 


3-90 


3-93 


35 


3^92 


3-94 


3^97 


3-99 


4.01 


3^95 


3-97 


3^99 


4.02 


4.04 



5mith9oni*n Tabies. 



112 



Table 45. 
rtEDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE 

METRIC MEASURES 



FOR TEMPERATURES ABOVE C 


1° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 




HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETEi; 






700 mm. 






705 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0f2 


0?4 


0?6 


0?8 


mometer. 






















c. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


0.00 


0.02 


0.05 


0.07 


0.09 


0.00 


0.02 


0.05 


0.07 


0.09 


I 


.11 


.14 


.16 


.18 


.21 


.12 


.14 


.16 


.18 


.21 


2 


■23 


•25 


.27 


•30 


•32 


•23 


•25 


.28 


•30 


•32 


3 


■34 


•37 


•39 


.41 


•43 


•35 


•37 


•39 


.41 


•44 


4 


.46 


.48 


•50 


•53 


•55 


.46 


.48 


•51 


•53 


.55 


5 


0.57 


0.59 


0.62 


0.64 


0.66 


0.58 


0.60 


0.62 


0.64 


0.67 


6 


.69 


•71 


•73 


.75 


•78 


.69 


•71 


•74 


.76 


.78 


7 


.80 


.82 


.85 


.87 


•89 


.81 


.83 


•85 


.87 


.90 


8 


•91 


•94 


.96 


•98 


I. GO 


.92 


•94 


•97 


•99 


1. 01 


9 


1.03 


1.05 


1.07 


1. 10 


1. 12 


1.04 


1.06 


1.08 


1. 10 


I-I3 


10 


1. 14 


1. 16 


1. 19 


1. 21 


1.23 


I-I5 


1. 17 


1.20 


1.22 


1.24 


II 


1.26 


1.28 


1.30 


1.32 


1-35 


1.26 


1.29 


1^31 


1^33 


i^36 


12 


1-37 


^•39 


1.42 


1.44 


1.46 


1.38 


1.40 


1.43 


1^45 


1.47 


13 


1. 48 


i^5i 


1-53 


i^55 


1^57 


1.49 


1-52 


1-54 


1^56 


1-59 


14 


1.60 


1.62 


1.64 


1.67 


1.69 


1.61 


^63 


1.65 


1.68 


1.70 


15 


r.71 


1-73 


1.76 


1.78 


1.80 


1.72 


1^75 


1.77 


1.79 


1.81 


i6 


1.82 


r.85 


1.87 


1.89 


1.92 


1.84 


1.86 


1.88 


1. 91 


^•93 


17 


1.94 


1.96 


1.98 


2.01 


2.03 


^•95 


1.98 


2.00 


2.02 


2.04 


i8 


2.05 


2.07 


2.10 


2.12 


2.14 


2.07 


2.09 


2. 1 1 


2,14 


2.16 


19 


2.17 


2.19 


2.21 


2.23 


2.26 


2.18 


2.20 


2.23 


2.25 


2.27 


20 


2.28 


2.30 


2.32 


2^35 


2.37 


2.30 


2.32 


2-34 


2.36 


2.39 


21 


2-39 


2.42 


2.44 


2.46 


2.48 


2.41 


2.43 


2.46 


2.48 


2.50 


22 


2-51 


2.. S3 


2.55 


2.57 


2.60 


2.52 


2.55 


2.57 


2-59 


2.62 


23 


2.62 


2.64 


2.67 


2.69 


2.71 


2.64 


2.66 


2.68 


2.71 


2-73 


24 


2.73 


2.76 


2.78 


2.80 


2.82 


2.75 


2.78 


2.80 


2.82 


2.84 


25 


2.85 


2.87 


2.89 


2.91 


2.94 


2.87 


2.89 


2.91 


2.94 


2.96 


26 


2.96 


2.98 


3.01 


3^03 


3^05 


2.98 


3.00 


3-03 


3^05 


3-07 


27 


3-07 


3.10 


3.12 


3-14 


3^16 


3.10 


3.12 


3-H 


3^16 


3-19 


28 


3-19 


3.21 


3^23 


3-25 


3^28 


3.21 


3-23 


325 


3-28 


3^30 


29 


3-30 


332 


3-34 


3-37 


3^39 


3^32 


3-35 


3-37 


3-39 


3-41 


30 


3-41 


3-44 


3-46 


3-48 


3^50 


3-44 


3-46 


3-48 


3-51 


3^53 


31 


3-53 


3-55 


3-57 


3-59 


3.62 


3-55 


3-57 


3.60 


3.62 


3^64 


32 


3-64 


3^66 


3.68 


3-71 


3^73 


3.66 


3-69 


3^71 


3-73 


3^76 


33 


3-75 


3-77 


3-8o 


3.S2 


3^84 


3-78 


3.80 


3^82 


3-85 


3-87 


34 


3-87 


3-89 


3^91 


3-93 


3^96 


3-89 


3^92 


3^94 


3-96 


3-98 


35 


3-98 


4.00 


4.02 


4^05 


4.07 


4.01 


4-03 


4-05 


4.07 


4.10 



Smithsonian Tables. 



113 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 



1 


HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROME'lER 






710 mm 








715 mm 


• 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


ram. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


0.00 


0.02 


0.05 


0.07 


0.09 


0.00 


0.02 


0.05 


0.07 


0.09 


I 


.12 


.14 


.16 


•19 


.21 


.12 


.14 


.16 


.19 


.21 


2 


•23 


.26 


.28 


•30 


•32 


•23 


.26 


.28 


.30 


.33 


3 


•35 


•37 


•39 


.42 


•44 


•35 


•37 


.40 


.42 


•44 


4 


.46 


•49 


•51 


.53 


•56 


•47 


•49 


•51 


•54 


•56 


5 


0.5S 


0.60 


0.63 


0.65 


0.67 


0.58 


0.61 


0.63 


0.65 


0.68 


6 


.70 


• 72 


•74 


•76 


•79 


.70 


• 72 


.75 


.77 


•79 


7 


.81 


•83 


.86 


.88 


.90 


.82 


.84 


.86 


•89 


•91 


8 


•93 


•95 


•97 


1. 00 


1.02 


•93 


.96 


•98 


I. GO 


1.03 


9 


1.04 


1.07 


1.09 


I. II 


^•13 


1.05 


1.07 


1. 10 


1. 12 


1. 14 


10 


1. 16 


1.18 


1.20 


1.23 


1^25 


1. 17 


1.19 


1. 21 


1.24 


1.26 


II 


1.27 


1.30 


1.32 


1^34 


1.37 


1.28 


i^3i 


i^33 


^•35 


1.38 


12 


1^39 


1.41 


1.44 


1.46 


1.48 


1.40 


1.42 


1-45 


1.47 


1.49 


13 


i^50 


1-53 


1^55 


1-57 


1.60 


1-52 


1-54 


1.56 


1.58 


1. 61 


14 


1.62 


1.64 


1.67 


1.69 


1. 71 


1.63 


1.65 


1.68 


1.70 


1.72 


15 


1.74 


1.76 


1.78 


1.80 


1.83 


1^75 


1.77 


1.79 


1.82 


1.84 


16 


i^85 


1.87 


1.90 


1.92 


1.94 


1.86 


1.89 


1.91 


1-93 


1.96 


17 


1.97 


1.99 


2.01 


2.04 


2.06 


1.98 


2.00 


2.03 


2.05 


2.07 


18 


2.08 


2.10 


2.13 


2.15 


2.17 


2.10 


2.12 


2.14 


2.17 


2.19 


19 


2.20 


2.22 


2.24 


2.27 


2.29 


2.21 


2.24 


2.26 


2.28 


2.30 


20 


2.31 


2-33 


2.36 


2.38 


2.40 


2.33 


2.35 


2.37 


2.40 


2.42 


21 


2.43 


2.45 


2.47 


2.50 


2.52 


2.44 


2.47 


2.49 


2.51 


2.54 


22 


2^54 


2.57 


2.59 


2.61 


2.63 


2.56 


2.58 


2.61 


2.63 


2.65 


23 


2.66 


2.68 


2.70 


2.73 


2.75 


2.68 


2.70 


2.72 


2.75 


2.77 


24 


2.77 


2. So 


2.82 


2.84 


2.86 


2.79 


2.81 


2.84 


2.86 


2.88 


25 


2.89 


2.91 


2^93 


2.96 


2.98 


2.91 


2.93 


2.95 


2.98 


3.00 


26 


3.00 


3-03 


3-05 


3^07 


3-09 


3.02 


3-05 


3-07 


3-09 


3.12 


27 


3.12 


3-14 


3- 16 


3-19 


3.21 


3-14 


3.16 


3-19 


3.21 


3-23 


28 


3^23 


3-25 


3.28 


3-30 


3-32 


3-25 


3.28 


3-30 


3-32 


3-35 


29 


3^35 


3-37 


3-39 


3-42 


3-44 


3^37 


3-39 


3-42 


3-44 


3^46 


30 


3-46 


3-48 


3-51 


3-53 


3-55 


3-49 


3-51 


3-53 


3.56 


3.58 


31 


3^58 


3.60 


3^62 


3-65 


3^67 


3.60 


3-62 


3-65 


3.67 


3^69 


32 


3^69 


3-71 


3-74 


3^76 


3-78 


3-72 


3-74 


3-76 


3-79 


3-81 


33 


3^8i 


3-83 


3^85 


3.87 


3-90 


3-83 


3.86 


3.88 


3-90 


3-92 


34 


3^92 


3^94 


3^97 


3-99 


4.01 


3-95 


3-97 


3-99 


4.02 


4.04 


35 


4^03 


4.06 


4.08 


4.10 


4-13 


4.06 


4.09 


4.11 


4-13 


4.16 



Smiihsonian Tables. 



114 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 
FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





nEIGHT OP THE BAROMETER 


HEIGHT OP THE BAROMETER || 








720 mm. 








725 mm. 




Attached 




















"~ 


Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















r> 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


0.00 


0.02 


0.05 


0.07 


0.09 


0.00 


0.02 


0.05 


0.07 


0.09 


I 


.12 


.14 


.16 


•19 


.21 


.12 


.14 


•17 


.19 


.21 


2 


.24 


.26 


.28 


•31 


■33 


.24 


.26 


.28 


•31 


•33 


3 


•35 


•38 


.40 


•42 


•45 


■36 


■38 


.40 


•43 


•45 


4 


•47 


•49 


•52 


•54 


•56 


■47 


•50 


•52 


•54 


•57 


5 

6 


0.59 


0.61 


0.63 


0.66 


0.68 


o^59 


0.62 


0.64 


0.66 


0.69 


•71 


•73 


.75 


•78 


.80 


•71 


•73 


.76 


.78 


.80 


7 

8 


.82 
•94 


.85 
.96 


•87 
•99 


•89 
1. 01 


.92 
1.03 


•83 
•95 


•85 
•97 


.88 
•99 


.90 
1.02 


•92 
1.04 


9 


1.06 


1.08 


1. 10 


I-I3 


i^i5 


1.06 


1.09 


I. II 


1. 14 


1.16 


10 


1. 17 


1.20 


1.22 


1.24 


1.27 


1. 18 


1. 21 


1.23 


1-25 


1.28 


II 


1.29 


I-3I 


1-34 


1.36 


1^39 


1.30 


1.32 


1-35 


1-37 


1-39 


12 


1.41 


1-43 


1.46 


1.48 


1.50 


1.42 


1.44 


1.47 


1.49 


I-5I 


13 


1-53 


1-55 


1-57 


1.60 


1.62 


1^54 


1.56 


1.58 


1.61 


1.63 


14 


1.64 


1.67 


1.69 


1. 71 


1.74 


1.65 


1.68 


1.70 


1^73 


1-75 


15 

i6 


1.76 


1.78 


1. 81 


1.83 


1.85 


1.77 


1.80 


1.82 


1.84 


1.87 


1.88 


1.90 


1.92 


1-95 


1-97 


1.89 


1.91 


1.94 


1.96 


1.98 


17 
i8 


1.99 


2.02 


2.04 


2.06 


2.09 


2.01 


2.03 


2.05 


2.08 


2.10 


2. 1 1 


2.13 


2.16 


2.18 


2.20 


2.13 


2^15 


2.17 


2.20 


2.22 


19 


2.23 


2.25 


2.27 


2.30 


2.32 


2.24 


2.27 


2.29 


2.31 


2.34 


20 


2.34 


2^37 


2.39 


2.41 


2.44 


2.36 


2.38 


2.41 


2.43 


2^45 


21 


2.46 


2.48 


2.51 


2.53 


2-55 


2.48 


2.50 


2.53 


2^55 


2-57 


22 


2.58 


2.60 


2.62 


2.65 


2.67 


2.60 


2.62 


2.64 


2.67 


2.69 


23 


2.69 


2.72 


2.74 


2.76 


2.79 


2.71 


2.74 


2.76 


2.78 


2.81 


24 


2.81 


2.83 


2.86 


2.88 


2.90 


2.83 


2.85 


2.88 


2.90 


2.92 


25 

26 


2.93 


2.95 


2.97 


3.00 


3.02 


2.95 


2.97 


3.00 


3.02 


3-04 


3-04 


3-07 


3-09 


3-II 


3^14 


3-07 


3-09 


3-II 


3 14 


3-16 


27 
28 


3.16 


3.18 


3.21 


3^23 


3-25 


3- 18 


3.21 


3-23 


3-25 


3-28 


3.28 


3-30 


3-32 


3-35 


3-37 


3-30 


3^32 


3-35 


3^37 


3-39 


29 


3-39 


3^42 


3-44 


3-46 


3-49 


3-42 


3^44 


3^46 


3-49 


3-51 


30 


3-51 


3-53 


3.56 


3-58 


3.60 


3-53 


3^56 


3-58 


3.60 


3^63 


31 


3-63 


3^65 


3.67 


3^70 


3-72 


3.65 


3.68 


3-70 


3^72 


3-75 


32 


3^74 


3^77 


3-79 


3^81 


3^84 


3-77 


3-79 


3.82 


3^84 


3-86 


33 


3.86 


3-88 


3-91 


3-93 


3-95 


3-89 


3-91 


3-93 


3^96 


3^98 


24 


3-98 


4.00 


4.02 


4.05 


4.07 


4.00 


4^03 


4- 05 


4.07 


4.10 


35 


4.09 
1 


4.11 


4.14 


4.16 


4.18 


4.12 


4.14 


4.17 


4.19 


4.21 



Smithsonian Tables. 



115 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE. THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


HEIGHT OP THE BAROMETER 






730 mm. 






735 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0' 


O.OO 


0.02 


0.05 


0.07 


O.IO 


0.00 


0.02 


0.05 


0.07 


O.IO 


I 


.12 


.14 


.17 


•19 


.21 


.12 


.14 


.17 


•i9 


.22 


2 


.24 


.26 


.29 


.31 


•33 


.24 


.26 


•29 


•31 


•34 


3 


.36 


•38 


.41 


.43 


•45 


.36 


.38 


.41 


•43 


.46 


4 


.48 


•50 


•52 


.55 


•57 


.48 


•50 


•53 


•55 


■58 


5 


0.60 


0.62 


0.64 


0.67 


0.69 


0.60 


0.62 


0.65 


0.67 


0.70 


6 


.71 


.74 


.76 


•79 


.Si 


•72 


• 74 


• 77 


•79 


.82 


7 


.83 


.86 


.88 


•91 


•93 


•84. 


.86 


.89 


•91 


•94 


8 


•95 


.98 


1. 00 


1.02 


1.05 


.96 


.98 


1. 01 


1.03 


1.06 


9 


1.07 


1. 10 


1. 12 


1. 14 


1. 17 


1.08 


1. 10 


I-I3 


1^15 


1. 17 


1 10 


1. 19 


1. 21 


1.24 


1.26 


1.29 


1.20 


1.22 


i^25 


1.27 


1.29 


II 


I-3I 


1-33 


1.36 


1.38 


1.40 


1.32 


^•34 


i^37 


1-39 


1. 41 


12 


1-43 


1-45 


1.48 


1.50 


1-52 


1.44 


1.46 


1.49 


I-5I 


^•53 


13 


1-55 


1-57 


1-59 


1.62 


1.64 


1.56 


1.58 


1.61 


1.63 


1.65 


14 


1.67 


1.69 


1. 71 


1.74 


1.76 


1.68 


1.70 


1.72 


1^75 


1.77 


15 


1.78 


1. 81 


1.83 


1.86 


1.88 


1.80 


1.82 


1.84 


1.87 


1.89 


i6 


1.90 


1-93 


1-95 


1.97 


2.00 


1.92 


1.94 


1.96 


1.99 


2.01 


17 


2.02 


2.05 


2.07 


2.09 


2.12 


2.04 


2.06 


2.08 


2. II 


2.13 


i8 


2.14 


2.16 


2.19 


2.21 


2.23 


2.15 


2.18 


2.20 


2.23 


2.25 


19 


2.26 


2.28 


2.31 


2.33 


2-35 


2.27 


2.30 


2.32 


2.35 


2.37 


20 


2.3S 


2.40 


2.42 


2.45 


2.47 


2.39 


2.42 


2.44 


2.46 


2.49 


21 


2.50 


2.52 


2.54 


2.57 


2.59 


2.51 


2.54 


2.56 


2.5S 


2.61 


22 


2.61 


2.64 


2.66 


2.68 


2.71 


2.63 


2.66 


2.68 


2.70 


2.73 


23 


2.73 


2.76 


2.78 


2.80 


2.83 


2.75 


2.77 


2.80 


2.82 


2.85 


24 


2.85 


2.87 


2.90 


2.92 


2.94 


2.87 


2.89 


2.92 


2.94 


2.97 


25 


2.97 


2.99 


3.02 


3-04 


3.06 


2.99 


3.01 


3-04 


3.06 


3.08 


26 


3-09 


3-II 


3-13 


3.16 


3- 18 


3-II 


3-13 


3-16 


3-i8 


3.20 


27 


3.20 


3-23 


3-25 


3-28 


3-30 


3-23 


3-25 


3-27 


3-30 


3-32 


28 


3-32 


3-35 


3-37 


3-39 


3-42 


3-35 


3-37 


3-. 39 


3-42 


3-44 


29 


3-44 


3-46 


3-49 


3-51 


3-54 


3-46 


3-49 


3^51 


3-54 


3-56 


30 


3.56 


3-58 


3.61 


3.63 


3.65 


3-58 


3-6i 


3.63 


3-65 


3-68 


31 


3-68 


3-70 


3-72 


3-75 


3-77 


3- 70 


3-73 


3-75 


3-77 


3.3o 


32 


3-79 


3-82 


3-84 


3-87 


3-89 


3-82 


3.84 


3.87 


3-89 


3-92 


33 


3-91 


3-94 


3-96 


3.98 


4.01 


3-94 


3-96 


3-99 


4.01 


4-03 


34 


4-03 


4-05 


4.08 


4.10 


4.12 


4.06 


4.08 


4.11 


4.13 


4-15 


35 


4-15 


4.17 


4.20 


4.22 


4.24 


4.18 


4.20 


4.22 


4.25 


4.27 



8MIIK8ONIAN TABLES. 



116 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0" CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 






740 mm. 






745 mm. 




Attached 






















I Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


O.OO 


0.02 


0.05 


0.07 


O.IO 


0.00 


0.02 


0.05 


0.07 


O.IO 


I 


.12 


•15 


•17 


•19 


.22 


.12 


•15 


•17 


.19 


.22 


2 


•24 


.27 


•29 


•31 


•34 


.24 


•27 


.29 


•32 


.34 


3 


■36 


•39 


.41 


.44 


.46 


•37 


•39 


.41 


•44 


.46 


4 


.48 


•51 


•53 


•56 


•58 


•49 


•51 


•54 


.56 


.58 


5 


0.60 


0.63 


0.65 


0.68 


0.70 


0.61 


0.63 


0.66 


0.68 


0.71 


6 


•72 


■75 


•77 


.80 


.82 


•73 


•75 


•78 


.80 


.83 


7 


•85 


.87 


•89 


.92 


•94 


■85 


.88 


.90 


•92 


.95 


8 


•97 


•99 


1. 01 


1.04 


1.06 


•97 


1. 00 


1.02 


1.05 


1.07 


9 


1.09 


I. II 


^•i3 


1. 16 


1. 18 


1.09 


1. 12 


1. 14 


1. 17 


I.19 


10 


1. 21 


1.23 


1.26 


1.28 


1.30 


1.22 


1.24 


1.26 


1.29 


I-3I 


II 


1^33 


^•35 


i^38 


1.40 


1.42 


1^34 


1.36 


K38 


1. 41 


1.43 


12 


i^45 


1.47 


1.50 


1^52 


^•54 


1.46 


1.48 


I •SI 


^•53 


^•55 


13 


1-57 


i^59 


1.62 


1.64 


1.66 


1.58 


1.60 


1.63 


^65 


1.68 


14 


1.69 


1. 71 


1.74 


1.76 


1. 78 


1.70 


1.72 


1-75 


1.77 


1.80 


15 


1. 81 


i^83 


1.86 


1.88 


1.90 


1.82 


i^85 


1.S7 


1.89 


1.92 


i6 


1^93 


i^95 


1.98 


2.00 


2.03 


1.94 


1.97 


1.99 


2.01 


2.04 


17 


2.05 


2.07 


2.10 


2.12 


2^15 


2.06 


2.09 


2. II 


2.14 


2.16 


i8 


2.17 


2.19 


2.22 


2.24 


2.27 


2.1S 


2.21 


2.23 


2.26 


2.28 


19 


2.29 


2.31 


2.34 


2.36 


2^39 


2.31 


2.33 


2-35 


2.3S 


2.40 


20 


2.41 


2^43 


2.46 


2.48 


2^51 


2.43 


2.45 


2.47 


2.50 


2.52 


21 


2.53 


2.55 


2.58 


2.60 


2.63 


2^55 


2^57 


2.59 


2.62 


2.64 


22 


2.65 


2.67 


2.70 


2.72 


2.75 


2.67 


2.69 


2.72 


2.74 


2.76 


23 


2.77 


2.79 


2.82 


2.84 


2.87 


2.79 


2.81 


2.84 


2.86 


2.88 


24 


2.89 


2.91 


2.94 


2.96 


2.99 


2.91 


2^93 


2.96 


2.98 


3.01 


25 


3.01 


3^03 


3.06 


3.08 


3-II 


3^03 


3-05 


3.08 


3.10 


3-13 


26 


3^13 


3^i5 


3-18 


3.20 


3.22 


3^15 


3^17 


3.20 


3.22 


3-25 


27 


3-25 


3^27 


3-30 


3^32 


3^34 


3^27 


3^29 


3^32 


3^34 


3^37 


28 


3^37 


3^39 


3^42 


3^44 


3^46 


3^39 


3^42 


3^44 


3^46 


3-49 


29 


3-49 


3^51 


3^54 


3-56 


3^58 


3^51 


3-54 


3-56 


3^58 


3.61 


30 


3.61 


3^63 


3^66 


3.68 


3- 70 


3-63 


3^66 


3.68 


3- 70 


3-73 


31 


3^73 


3-75 


3^78 


3.80 


3.82 


3^75 


3^78 


3.80 


3-82 


3^85 


32 


3^S5 


3^87 


3^89 


3^92 


3^94 


3-87 


3-90 


3^92 


3^95 


3^97 


33 


3-97 


3^99 


4.01 


4.04 


4.06 


3^99 


4.02 


404 


4-Q7 


4.09 


34 


4.09 


4. 1 1 


4^13 


4.16 


4.18 


4. 1 1 


4.14 


4.16 


4.19 


4.21 


35 


4.21 


4^23 


4-25 


4. 28 


4^3o 


4^23 


4.26 


4.28 


4^3i- 


4^33 



Smithsonian Tables. 



117 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER | 






750 mm 


. 






755 mm 


1. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


0.00 


0.02 


0.05 


0.07 


0. 10 


0.00 


0.02 


0.05 


0.07 


0. 10 


I 


.12 


•15 


•17 


.20 


.22 


.12 


.15 


.17 


.20 


.22 


2 


•25 


.27 


.29 


•32 


•34 


•25 


•27 


•30 


•32 


•35 


3 


■2,7 


•39 


.42 


.44 


•47 


•37 


•39 


.42 


.44 


•47 


4 


•49 


•51 


•54 


•56 


•59 


•49 


•52 


•54 


•57 


•59 


5 


0.61 


0.64 


0.66 


0.69 


0.71 


0.62 


0.64 


0.67 


0.69 


0.71 


6 


•73 


.76 


.78 


.81 


•83 


.74 


.76 


•79 


.81 


.84 


7 


.86 


.88 


•91 


•93 


•95 


.86 


.89 


•91 


•94 


.96 


S 


•98 


1. 00 


1.03 


1.05 


1.08 


•99 


1. 01 


1.03 


1.06 


1.08 


9 


1. 10 


I-I3 


I.I5 


1. 17 


1.20 


I. IX 


i^i3 


1.16 


1. 18 


1. 21 


10 


1.22 


I^25 


1.27 


1.30 


1.32 


1.23 


1.26 


1.28 


I-3I 


i-.^3 


II 


1-35 


1-37 


1-39 


1.42 


1.44 


1^35 


1.38 


1.40 


1-43 


1-45 


12 


1.47 


1.49 


1-52 


1-54 


1.56 


1.48 


1.50 


1^53 


1-55 


1.58 


13 


1-59 


1.61 


1.64 


1.66 


1.69 


1.60 


1.62 


1.65 


1.67 


1.70 


14 


1. 71 


1.74 


1.76 


1.78 


1. 81 


1.72 


1-75 


1.77 


r.8o 


1.82 


15 


1.83 


1.85 


1. 88 


1. 91 


1-93 


1.S5 


1.87 


1.89 


1.92 


1.94 


i6 


1.96 


1.98 


2.00 


2.03 


2.05 


1.97 


1.99 


2.02 


2.04 


2.07 


17 


2.08 


2.10 


2.13 


2-15 


2.17 


2.09 


2.12 


2.14 


2.16 


2.19 


i8 


2.20 


2.22 


2.25 


2.27 


2.30 


2.21 


2.24 


2.26 


2.29 


2.31 


19 


2.32 


2-34 


2.37 


2.39 


2.42 


2.34 


2.36 


2.38 


2.41 


2.43 


20 


2.44 


2.47 


2.49 


2.52 


2.54 


2.46 


2.48 


2.51 


2^53 


2.56 


21 


2.56 


2.59 


2.61 


2.64 


2.66 


2.5S 


2.61 


2.63 


2.65 


2.68 


22 


2.69 


2.71 


2.73 


2.76 


2.78 


2.70 


2.73 


2.75 


2.78 


2.80 


23 


2.81 


2.83 


2.86 


2.88 


2.90 


2.83 


2.85 


2.87 


2.90 


2.92 


24 


2.93 


2.95 


2.98 


3.00 


3-03 


2.95 


2.97 


3.00 


3.02 


3^05 


25 


3-05 


3^07 


3.10 


3.12 


3-15 


3^07 


3-09 


3.12 


3^i4 


3-17 


26 


3-17 


3.20 


3.22 


3-24 


3^27 


3-19 


3.22 


3^24 


3^27 


3-29 


27 


3-29 


3-33 


3-34 


3-37 


3-39 


3-31 


3-34 


3^36 


3-39 


3^41 


28 


3-41 


3-44 


3-46 


3-49 


3-51 


3-44 


3-46 


3-49 


3^51 


3^53 


29 


3-54 


3-56 


3-58 


3^61 


3-63 


3^56 


3-58 


3^61 


3^63 


3-66 


30 


3.66 


3.68 


3-71 


3-73 


3-75 


3.68 


3^71 


3^73 


3-75 


3.78 


31 


3.78 


3.80 


3.83 


3.85 


3-87 


3.80 


3-83 


3.85 


3-88 


3^90 


32 


3-90 


3-92 


3^95 


3-97 


4.00 


3^92 


3^95 


3-97 


4.00 


4.02 


33 


4.02 


4.04 


4.07 


4.09 


4.12 


4-05 


4.07 


4.10 


4.12 


4.14 


34 


4.14 


4.17 


4.19 


4.21 


4.24 


4.17 


4.19 


4.22 


4.24 


4.27 


L'l^ 


■4.26 


4.29 


4^31 


4-33 


4^36 


4.29 


4^31 


4^34 


4-36 


4-39 



Smithsonian T»eLES. 



118 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 


" CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 






HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 




1 




760 mm. 






765 mm. 






Attached 
























Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 




mometer. 
























C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0" 


0.00 


0.02 


0.05 


0.07 


O.IO 


0.00 


0.03 


0.05 


0.07 


O.IO 




I 


.12 


.15 


.17 


.20 


.22 


•13 


•15 


•17 


.20 


.22 




2 


•25 


.27 


•30 


•32 


•35 


•25 


•27 


•30 


•32 


•35 




3 


•37 


.40 


.42 


•45 


•47 


•37 


.40 


.42 


.45 


•47 




4 


•50 


•52 


•55 


•57 


.60 


•50 


' ^52 


•55 


•57 


.60 




5 


0.62 


0.65 


0.67 


0.69 


0.72 


0.62 


0.65 


0.67 


0.70 


0.72 




6 


•74 


•77 


•79 


.82 


.84 


•75 


.77 


.80 


.82 


•85 




7 


.87 


.89 


.92 


•94 


•97 


•87 


.90 


.92 


•95 


•97 




8 


•99 


1.02 


1.04 


1.07 


1.09 


1. 00 


1.02 


1.05 


1.07 


1. 10 




9 


1. 12 


1. 14 


1. 17 


1. 19 


1. 21 


1. 12 


1^15 


I.17 


1.20 


1.22 




10 


1.24 


1.26 


1.29 


1-31 


1^34 


1^25 


1.27 


1.30 


1.32 


1-35 




II 


1.36 


^•39 


1.41 


1.44 


1.46 


1.37 


1.40 


1.42 


1-45 


1.47 




12 


1.49 


1-51 


1-54 


1.56 


^•59 


1.50 


1-52 


i^55 


1-57 


1.60 




13 


1. 61 


1.64 


1.66 


1.68 


1. 71 


1.62 


1.65 


1.67 


1.70 


1.72 




14 


1^73 


1.76 


1.78 


1.81 


1^83 


1-75 


1.77 


1.80 


1.82 


X.85 




15 


1.86 


1.88 


1.91 


1^93 


1.96 


1.87 


1.89 


1.92 


1.94 


1.97 




i6 


1.98 


2.01 


2.03 


2.06 


2.08 


1.99 


2.02 


2.04 


2.07 


2.09 




17 


2.10 


2.13 


2.15 


2.18 


2.20 


2.12 


2.14 


2.17 


2.19 


2.22 




i8 


2.23 


2.25 


2.28 


2.30 


2.33 


2.24 


2.27 


2.29 


2.32 


2.34 




19 


2.35 


2.38 


2.40 


2.43 


2^45 


2.37 


2.39 


2.42 


2.44 


2.47 




20 


2.47 


2.50 


2.52 


2.55 


2.57 


2.49 


2.52 


2-54 


2.57 


2^59 




21 


2.60 


2.62 


2.65 


2.67 


2.70 


2.62 


2.64 


2.66 


2.69 


2.71 




22 


2.72 


2.75 


2.77 


2.80 


2.82 


2.74 


2.76 


2.79 


2.81 


2.84 




23 


2.84 


2.87 


2.89 


2.92 


2.94 


2.86 


2.89 


2.91 


2.94 


2.96 




24 


2.97 


2.99 


3.02 


3^04 


3^07 


2.99 


3.01 


3-04 


3.06 


3^09 




25 


3-09 


3.12 


3-14 


3^16 


3-19 


3-II 


3^14 


3^16 


3^19 


3^21 




26 


3.21 


3-24 


3.26 


3-29 


3^31 


3^23 


3^26 


3.28 


3.31 


3.33 




27 


3^34 


3^36 


3^39 


3^41 


3-43 


3^36 


3-38 


3^41 


3 43 


3^46 




28 


3-46 


3^48 


3^51 


3^53 


3-56 


3^48 


3-51 


3^53 


3^56 


3^58 




29 


3-58 


3.61 


3^63 


3.66 


3.68 


3^6i 


3^63 


3^66 


3-68 


3^7o 




30 


3-71 


3^73 


3^75 


3-78 


3.80 


3^73 


3-75 


3^78 


3.80 


3^83 




31 


3^83 


3^85 


3.88 


3-90 


3-93 


3^85 


3^88 


3^90 


3^93 


3-95 




32 


3^95 


3.98 


4.00 


4.02 


4-05 


3^98 


4.00 


4^03 


4^05 


4.08 




33 


4.07 


4.10 


4.12 


4-15 


4.17 


4.10 


4^13 


4-15 


4.17 


4.20 




34 


4.20 


4.22 


4-25 


4.27 


4.29 


4.22 


4^25 


4.27 


4-30 


4.32 




35 


4^32 


4-34 


4^37 


4^39 


4.42 


4^35 


4-37 


4.40 


4.42 


4-45 





6MITHSONIAN Table*. 



119 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


HEIGHT OF THE BAROMETER 






770 mm. 






775 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


O.OO 


0.03 


0.05 


0.08 


O.IO 


0.00 


0.03 


0.05 


0.08 


O.IO 


I 


•13 


.15 


.18 


.20 


•23 


•13 


•15 


.18 


.20 


.23 


2 


•25 


.28 


•30 


.33 


.35 


•25 


.28 


•30 


•33 


.35 


3 


.38 


.40 


.43 


•45 


•48 


.38 


.40 


•43 


.46 


.48 


4 


•50 


.53 


•55 


•58 


.60 


•51 


•53 


•56 


•58 


.61 


5 


0.63 


0.65 


0.68 


0.70 


0.73 


0.63 


0.66 


0.68 


0.71 


0.73 


6 


•75 


.78 


.80 


•83 


•85 


.76 


.78 


.81 


.83 


.86 


7 


.88 


.90 


•93 


•95 


.98 


.89 


.91 


•94 


.96 


•99 


8 


1. 01 


1.03 


1.06 


1.08 


I. II 


1. 01 


1.04 


1.06 


1.09 


i.ii 


9 


i^i3 


1.16 


i.iS 


1. 21 


1.23 


I.14 


1. 16 


1.19 


1. 21 


1.24 


10 


1.26 


1.28 


1^31 


1-33 


1.36 


1.26 


1.29 


^•31 


1^34 


1.36 


11 


1.38 


I.41 


1-43 


1.46 


1.48 


1-39 


1.42 


1.44 


1.47 


1.49 


12 


I-5I 


1-53 


1.56 


1.58 


1.61 


1-52 


1.54 


1-57 


1-59 


1.62 


13 


1.63 


1.66 


1.68 


1.71 


1^73 


1.64 


1.67 


1.69 


1.72 


1.74 


14 


1.76 


1.78 


1. 81 


1.83 


1.86 


1.77 


1.79 


1.82 


1.84 


1.87 


15 


1.88 


1.91 


1-93 


1.96 


1. 98 


1.89 


1.92 


1.94 


1.97 


2.00 


i6 


2.01 


2.0-5 


2.06 


2.08 


2. 1 1 


2.02 


2.05 


2.07 


2.10 


2.12 


17 


2.13 


2.16 


2.18 


2.21 


2.23 


2.15 


2.17 


2.20 


2.22 


2.25 


i8 


2.26 


2.28 


2^31 


2.33 


2.36 


2.27 


2.30 


2.32 


2-35 


2.37 


19 


2.38 


2.41 


2.43 


2.46 


2.48 


2.40 


2.42 


2.45 


2.47 


2.50 


20 


2.51 


2.53 


2.56 


2.58 


2.61 


2.52 


2.55 


2.57 


2.60 


2.62 


21 


2.63 


2.66 


2.68 


2.71 


2.73 


2.65 


2.67 


2.70 


2.72 


2.75 


22 


2.76 


2.78 


2.81 


2.83 


2.86 


2.77 


2.80 


2.83 


2.85 


2.88 


23 


2.88 


2.91 


2.93 


2.96 


2.98 


2.90 


2-93 


2.95 


2.98 


3.00 


24 


3.01 


3-03 


3.06 


3.08 


3^ii 


3^03 


3-05 


3.08 


3.10 


3-13 


25 


3-13 


3-16 


3.18 


3.21 


3-23 


3-15 


3- 18 


3.20 


3-23 


3-25 


26 


3.26 


3-28 


3-31 


3^33 


3.36 


3-28 


3^30 


3-33 


3-35 


3.38 


27 


3-38 


3-41 


3-43 


3.46 


3-48 


3-40 


3-43 


3-45 


3-48 


3- 50 


28 


3-51 


3-53 


3.56 


3-58 


3.60 


3-53 


3-55 


3-58 


3.60 


3.63 


29 


3-63 


3-65 


3.68 


3^70 


3^73 


3-65 


3-68 


3- 70 


3-73 


3-75 


30 


3-75 


3.78 


3.80 


3^83 


3-85 


3.78 


3.80 


3.83 


3.S5 


3-88 


31 


3-88 


3-90 


3.93 


3-95 


3.98 


3-90 


3-93 


3-95 


3-98 


4.00 


32 


4.00 


4-03 


4.05 


4.08 


4.10 


4-03 


405 


4.0S 


4.10 


4-13 


33 


4.13 


4-15 


4.18 


4.20 


4.23 


4-15 


4.18 


4.20 


4-23 


4.25 


34 


4-25 


4.28 


4-30 


4-33 


4-35 


4. 28 


4.30 


4-33 


4-35 


4. 38 


35 


4.38 


4.40 


4-43 


4^45 


4.48 


4.40 


4.43 


4^45 


4.48 


4.50 

1 



Smithsonian Table*. 



120 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE. 

METRIC MEASURES. 

FOR TEMPERATURES ABOVE 0° CENTIGRADE. THE CORRECTION IS TO BE SUBTRACTED. 





iiKicirr OF rrir: i 


!AI!<)Mi:'l 


1:1; 


lIEIfillT OF THE HAKOMETER 








780 mm. 






785 mm. 






Attached 
























Ther. 


0?0 


0°2 


0°4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 




mometer. 
























c. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0° 


0.00 


0.03 


0.05 


0.08 


0. 10 


0.00 


0.03 


0.05 


0.08 


0. 10 




I 


•13 


•15 


.18 


.20 


•23 


•13 


•15 


.18 


.21 


•23 




2 


•25 


.28 


•31 


•33 


•36 


.26 


.28 


•31 


•33 


•36 




3 


•38 


.41 


•43 


.46 


.48 


.38 


.41 


■44 


.46 


•49 




4 


•51 


•53 


•56 


•59 


.61 


•51 


•54 


.56 


•59 


.62 




5 


0.64 


0.66 


0.69 


0.71 


0.74 


0.64 


0.67 


0.69 


0.72 


0.74 




6 


.76 


•79 


.81 


.84 


.87 


.77 


•79 


.82 


■85 


.87 




7 


.89 


.92 


•94 


•97 


•99 


.90 


•92 


•95 


•97 


1. 00 




S 


1.02 


1.04 


1.07 


1.09 


1. 12 


1.02 


1.05 


1.08 


1. 10 


^•13 




9 


I-I5 


1. 17 


1.20 


1.22 


I^25 


I.15 


1. 18 


1.20 


^•23 


^•25 




ro 


1.27 


1.30 


1.32 


1-35 


1^37 


1.28 


i^3i 


1^33 


1.36 


1.38 




II 


1.40 


1.42 


1.45 


1.48 


1.50 


1. 41 


1^43 


1.46 


1.48 


I-5I 




12 


1-53 


i^55 


1.58 


1.60 


1.63 


i^54 


1.56 


1-59 


1. 61 


1. 64 




13 


1.65 


1.68 


1.70 


1^73 


1-75 


1.66 


1.69 


1.71 


1.74 


1.77 




14 


1.78 


1. 81 


1.83 


1.86 


1.88 


1.79 


1.82 


1.84 


1.87 


1.89 




15 


1. 91 


1-93 


1.96 


1.98 


2.01 


1.92 


1.94 


1.97 


2.00 


2.02 




i6 


2.03 


2.06 


2.08 


2. II 


2.13 


2.05 


2.07 


2.10 


2.12 


2-15 




17 


2.16 


2.19 


2.21 


2.24 


2.26 


2.17 


2.20 


2.22 


2.25 


2.28 




i8 


2.29 


2.31 


2.34 


2.36 


2-39 


2.30 


2.33 


2.35 


2.38 


2.40 




19 


2.41 


2.44 


2.46 


2.49 


2^51 


2.43 


2-45 


2.48 


2.51 


2.53 




20 


2.54 


2.57 


2^59 


2.62 


2.64 


2.56 


2.58 


2.61 


2.63 


2.66 




21 


2.67 


2.69 


2.72 


2.74 


2.77 


2.68 


2.71 


2.73 


2.76 


2.79 




22 


2.79 


2.82 


2.84 


2.87 


2.89 


2.81 


2.84 


2.86 


2.89 


2.91 




23 


2.92 


2.94 


2.97 


3.00 


3.02 


2.94 


2.96 


2.99 


3.01 


3-04 




24 


3-05 


3^07 


3.10 


3.12 


3-15 


3^07 


3-09 


3.12 


3^14 


3^17 




25 


3-17 


3.20 


3.22 


3^25 


3-27 


3^19 


3.22 


3^24 


3-27 


3-29 




26 


3-30 


3^32 


3^35 


3^37 


3^40 


3^32 


3-34 


3-37 


3^40 


3^42 




27 


3-42 


3^45 


3^47 


3-50 


3^53 


3^45 


3-47 


3- 50 


3-52 


3^55 




28 


3-55 


3-58 


3.60 


3-63 


3^65 


3^57 


3.60 


3^62 


3.65 


3-67 




29 


3-68 


3^70 


3^73 


3-75 


3-78 


3^70 


3^73 


3-75 


3^78 


3.80 




30 


3.80 


3.83 


3^85 


3^8S 


3^90 


3^83 


3-85 


3^88 


3^90 


3-93 




31 


3-93 


3-95 


3^98 


4.00 


4^03 


3^95 


3-98 


4.00 


4.03 


4.06 




32 


4-05 


4.08 


4.11 


4^13 


4.16 


4.08 


4. 1 1 


4-13 


4.16 


4.18 




33 


4.18 


4.21 


4.23 


4.26 


4. 28 


4.21 


423 


4.26 


4.28 


4.31 




34 


4.31 


4^33 


4-36 


4^38 


4.41 


4^33 


4.36 


4^39 


4.41 


4^44 




35 


4-43 


4.46 


4.48 


4-51 


4^53 


4.46 


4^49 


4^51 


4-54 


4^56 





SMITH8OW *N Tables. 



121 



Table 45. 
REDUCTION OF THE BAROMETER TO STANDARD TEMPERATURE 

METRIC MEASURES. 



FOR TEMPERATURES ABOVE 0° CENTIGRADE, THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER 


HEIGHT OF THE B,\ROMETER 






790 mm. 






795 mm. 




Attached 






















Ther- 


0?0 


0?2 


0?4 


0?6 


0?8 


0?0 


0?2 


0?4 


0?6 


0?8 


mometer. 






















C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0° 


0.00 


0.03 


0.05 


0.08 


O.IO 


0.00 


0.03 


0.05 


0.08 


O.IO 


I 


•13 


•15 


.18 


.21 


•23 


•13 


.16 


.18 


.21 


•23 


2 


.26 


.28 


•31 


•34 


•36 


.26 


.29 


•31 


•34 


•36 


3 


•39 


.41 


•44 


.46 


•49 


•39 


.42 


•44 


•47 


•49 


4 


•52 


•54 


•57 


•59 


.62 


•52 


•55 


•57 


.60 


.62 


5 


0.64 


0.67 


0.70 


0.72 


0.75 


0.65 


0.67 


0.70 


0.73 


0.75 


6 


■ 77 


.80 


•83 


.85 


.88 


.78 


.80 


.83 


.86 


.88 


7 


.90 


•93 


•95 


•98 


1. 01 


•91 


•93 


.96 


•99 


1. 01 


8 


1.03 


1.06 


1.08 


I. II 


I^i3 


1.04 


1.06 


1.09 


1. 12 


1. 14 


9 


1. 16 


1. 19 


1. 21 


1.24 


1.26 


1. 17 


1. 19 


1.22 


1.24 


1.27 


10 


1.29 


I-3I 


1-34 


1^37 


1^39 


1.30 


1.32 


1^35 


1^37 


1.4c 


II 


1.42 


1.44 


1.47 


1.49 


1^52 


1^43 


1-45 


1.48 


1.50 


1^53 


12 


1-55 


1-57 


1.60 


1.62 


1.65 


^56 


i^58 


1. 61 


1.63 


1.66 


13 


1.67 


1.70 


1^73 


1^75 


1.78 


1.68 


1. 71 


1.74 


1.76 


1.79 


14 


I. So 


1.83 


1.85 


1.88 


1.91 


1.81 


1.84 


1.87 


1.89 


1.92 


15 


1-93 


1.96 


1.98 


2.01 


2.03 


1.94 


1.97 


1.99 


2.02 


2.05 


i6 


2.06 


2.09 


2. II 


2.14 


2.16 


2.07 


2.10 


2.12 


2.15 


2.18 


17 


2.19 


2.21 


2.24 


2.26 


2.29 


2.20 


2.23 


2.25 


2.28 


2.30 


i8 


2.32 


2.34 


2^37 


2^39 


2.42 


2.33 


2.36 


2.38 


2.41 


2.43 


19 


2.44 


2.47 


2.50 


2.52 


2.55 


2.46 


2.49 


2.51 


2.54 


2.56 


20 


2.57 


2.60 


2.62 


2.65 


2.67 


2.59 


2.61 


2.64 


2.67 


2.69 


21 


2.70 


2.73 


2.75 


2.78 


2.80 


2.72 


2.74 


2.77 


2.79 


2.82 


22 


2.83 


2.85 


2.88 


2.91 


2-93 


2.85 


2.87 


2.90 


2.92 


2.95 


23 


2.96 


2.98 


3.01 


3^03 


3.06 


2.98 


3.00 


3-03 


3-05 


3-o8 


24 


3.08 


3-II 


3^14 


3^i6 


3^19 


3.10 


3^13 


3^i6 


3-18 


3.21 


25 


3.21 


3-24 


3.26 


3^29 


3^31 


3^23 


3^26 


3^28 


3-31 


3^34 


26 


3-34 


3-37 


3^39 


3-42 


3-44 


3^36 


3^39 


3^4i 


3^44 


3^46 


27 


3-47 


3^49 


3^52 


3^54 


3-57 


3-49 


3^52 


3-54 


3^57 


3^59 


28 


3.60 


3.62 


3-65 


3^67 


3^70 


3^62 


3.64 


3-67 


3^70 


3^72 


29 


3-72 


3-75 


Z-11 


3.80 


3^83 


3-75 


3-77 


3.80 


3.82 


3^85 


30 


3.85 


3.88 


3-90 


3-93 


3^95 


3.88 


3^90 


3^93 


3-95 


3^98 


31 


3-9« 


4.00 


4-03 


4.06 


4.0S 


4.00 


4-03 


4.06 


4.08 


4.11 


32 


4. 1 1 


4^13 


4.16 


4.18 


4.21 


4.13 


4.16 


4.18 


4.21 


4.24 


33 


4-23 


4.26 


4.29 


4^31 


4^34 


4.26 


4.29 


4.31 


4^34 


4^36 


34 


4-36 


4^39 


4.41 


4.44 


4.46 


4-39 


4.42 


4.44 


4^47 


4^49 


35 


4-49 


4^5i 


4-54 


457 


4^59 


4^52 


4.54 


4^57 


4^59 


4.62 



6MIT 48CNIAN TABLES. 



122 



Table 46. 
REDUCTION OF THE MERCURIAL COLUMN TO STANDARD TEMPERATURE. 

ENGLISH MEASURES 
Table reconstructed from Table 44 to adapt it to U-shaped manometers with brass scales. 



■S E = 

m O <1> 



12 

14 
16 
18 
20 

22 

24 
26 

28 

30 

32 

34 
36 
38 
40 

42 

44 
46 

48 

50 

52 

54 
56 
58 
60 



Difference in height of the two columns, i. e., the algebraic 
difference of their readings, in inches. 



Inch. 

+0.003 

+0.002 
.002 
.002 
.002 
.002 

+0.002 
.001 
.001 
.001 
.001 

+0.001 
.000 
.000 
.000 
.000 

o.oool 

— .001 

.001 

.001 

.001 



— 0.00 1 
.001 
.002 
.002 
.002 

— 0.002 
.002 

.002 

.003 
.003 



Inch. 
+0.005 

+0.005 
.004 
.004 
.004 
.003 

+0.003 
.003 
.002 
.002 
.002 

+0.001 
.001 
.001 
.000 
.000 

—0.00 1 
.001 
.001 
.002 
.002 



62 


— 0.003 


64 


.003 


66 


•003 


68 


.004 


70 


.004 


72 


— 0.004 


74 


.004 


76 


.004 


78 


.004 


80 


•005 


82 


—0.005 - 


84 


•005 


86 


.005 


88 


.005 


90 


.006 


92 


— 0.006 - 


94 


.006 


96 


.006 


98 


.006 


100 


.006 



— 0.002 

.003 
.003 

.004 
.004 

—0.004 

.005 
•005 
.005 

.006 

-0.006 
.006 
.007 
.007 
.007 

-0.008 
.008 

.009 
.009 
.009 

-O.OIO 

.010 
.010 
.oil 
.oil 

-O.OII 

.012 
.012 

.013 
.013 



Inch 
+0.008 

+0.007 
.007 
.006 
.006 
.005 

+0.005 
.004 
.003 
•003 
.002 

+0.002 
.001 
.001 
.000 
.000 

—0.00 1 
.002 
.002 
.003 
.003 

-0.004 
.004 
.005 
.005 
.006 

-0.006 
.007 
.007 
.008 
.008 

-0.009 
.010 
.010 
.Oil 
.01 1 1 

-0.012 
.012 
.013 
.013 
.014 

■0.014 
.015 
.016 
.016 
.017 

— 0.017 
.018 
.018 
.019 
.019 



Inch. Inch. 
+0.010 +0.013 



+0.010 
.009 
.008 
.008 
.007 

+0.006 
•005 
•005 
.004 
.003 

+0.002 
.002 
.001 
.000 



— .001 — .001 



— O.OOI 

.002 

.003 
•003 

.004 

-0.005 

.006 
.006 
.007 
.008 

-0.008 
.009 
.010 
.oil 
.oil 

-0.012 

.013 

.014 
.014 

.015 

-0.016 
.016 
.017 

.018 

.019 

-0.019 
.020 

.021 
.021 
.022 

-0.023 
.024 
.024 
.025 
.026 



+0.012 
.Oil 
.010 
.009 
.008 

+0.008 
.007 
.006 
.005 
.004 

+0.003! 
.002 
.001 
.000 



6 



-0.002 
.003 
•003 
.004 
.005 

-0.006 
.007 
.008 
.009 
.010 

-O.OI I 

.oil 
.012 

•013 

.014 

-0.015 

.016 

.017 
.018 

.019 

■0.020 
.020 
.021 
.022 

.023 

0.024 

•025 

.026 
.027 

.028 

— 0.029 

.030 
•030 
.031 
.032 



Inch. 
+0.016 

+0.015 
.013 
.012 
.Oil 
.010 

+0.009 
.008 
.007 
.006 
.005 

+0.004 

.002 

.001 

.000 

— .001 

— 0.002 
■003 
.004 
•005 
.006 

—0.007 
.008 
.009 
.Oil 

.012 

-0.013 

.014 

•015 

.016 
.017 

-0.018 
.019 
.020 

.021 
.022 1 

-0.024 
•025 
.026 
.027 
.028 

-0.029 
.030 
.031 
.032 
•033 

-0.034 

•035 
.036 
.038 
•039 



Inch. 
+0.018 

+0.017 
.016 
.015 
.013 
.012 

+0.01 1 
.009 
.008 
.007 
.006 

+0.004 
•003 
.002 
.000 
-.001 

— 0.002 
.004 
.005 
.006 
.007 

—0.009 
.010 
.Oil 
.012 
.014 

-0.015 
.016 
.017 
.019 
.020 

-0.021 
.022 
.024 
.025 
.026 

-0.027 
.029 
.030 
.031 
,032 

-0.034 

•035 
.036 

•037 
•039 

-0.040 
.041 
•043 
•044 
•045 



8 



Inch. 
+0.021 

+0.019 
.018 
.017 
.015 
.014 

+0.012 
.Oil 
.009 
.008 
.006 

+ 0.005 

•003 

.002 

.001 

— .001 

—0.003 
.004 
•005 
.007 
.008 

—O.OIO 

.oil 

.013 

.014 
.016 

—0.017 

.018 

.020 
.021 

.023 

-0.024 
.026 
.027 

.028 
.030 

-0.031 
•033 
•034 
.036 

•037 
-0.039 

.040 
.042 

•043 
•044 

-0.046 

.047 
.049 
.050 
.052 



Inch. 
+0.023 

+0.022 
0.20 
.019 
.017 
.015 

+0.014 
.012 
.010 
.009 
.007 

+0.005 

.004 

.002 

.001 

— .001 

—0.003 
.005 
.006 
.008 
.009 

—O.OII 

.012 
.014 
.016 
.018 



10 



—0.019 
.021 
.022 
.024 
•025 

-0.027 
.029 
.031 
.032 
•034 

-0.035 

•037 
.038 
.040 
.042 

-0.043 

•045 
.047 
.048 
.050 

-0.052 
•053 
•055 
.056 
•058I 



Inch. 
+0.026 

+0.024 
0.22 
.021 
.019 
.017 

+0.015 
.013 
.012 
.010 
.008 

+0.006 

.004 

•003 

.001 

— .001 

— 0.003 
.005 
.007 
.008 
.010 

—0.012 
.014 
.016 
.018 
.019 



— 0.021 
.023 
•025 
.027 
.028 

-0.030 
.032 

•034 
.036 

•037 

-0.039 
.041 
•043 
•045 
.046 

-0.048 
.050 
.052 
•053 
•055 

-0.057 

•059 
.061 
■063 
.064 



Smithsonian Tables 
14 



123 



Table 46. 



REDUCTION OF THE MERCURIAL COLUMN TO STANDARD TEMPERATURE. 

ENGLISH MEASURES 
Table reconstructed from Table 44 to adapt it to U-shaped manometers with brass scales. 



■0^3; 


Difference in height of the two columns, i. e., the algebraic 


■5 if 


DIFFERENCE OF THEIR READINGS, IN INCHES. 


11 12 


13 


14 


15 


16 


17 


18 


19 


20 


F. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


0° 


+0.029 


+0.031 


+0.034 


+0.037 


+0.039 


+0.042 


+0.044 


+0.047 


+0.050 


+0.052 


2 


+0.027 


+ 0.029 


+0.031 


+ 0.034 


+0.036 


+0.039 


+0.041 


+ 0.044 


+0.046 


+0.049 


4 


.025 


.027 


.029 


.031 


•033 


.036 


.038 


.040 


•043 


•045 


6 


.023 


■025 


.027 


.029 


.031 


■033 


•035 


.037 


•039 


.041 


8 


.021 


.023 


.025 


.026 


.028 


.030 


.032 


.034 


.036 


.038 


10 


.019 


.020 


.022 


.024 


.025 


.027 


.029 


.031 


.032 


•034 


12 


+ 0.017 


+0.018 


+0.020 


+ 0.021 


+0.023 


+ 0.024 


+0.026 


+0.027 


+0.029 


+ 0.030 


14 


.015 


.016 


.017 


.018 


.020 


.021 


.023 


.024 


.025 


.027 


16 


.013 


.014 


.015 


.016 


.017 


.019 


.020 


.021 


.022 


.023 


18 


.Oil 


.012 


.013 


.014 


.015 


.016 


.016 


.017 


.018 


.019 


20 


.009 


.009 


.010 


.Oil 


.012 


.013 


.013 


.014 


.015 


.016 


22 


+ 0.007 


+0.007 


+0.008 


+0.008 


+0.009 


+0.010 


+ 0.010 


+ 0.01 1 


+0.01 1 


+0.012 


24 


.005 


•005 


.006 


.006 


.006 


.007 


.007 


.008 


.008 


.008 


26 


.003 


.003 


.003 


.004 


.004 


.004 


.004 


.004 


.005 


.005 


28 


.001 


.001 


.001 


.001 


.001 


.001 


.001 


.001 


.001 


.001 


30 


— O.OOI 


— 0.002 


— 0.002 


— 0.002 


— 0.002 


— 0.002 


— 0.002 


— 0.002 


— 0.002 


— 0.002 


32 


—0.003 


— 0.004 


— 0.004 


— 0.004 


—0.005 


— 0.005 


—0.005 


— 0.006 


— 0.006 


— 0.006 


34 


.005 


.006 


.007 


.007 


.008 


.008 


.008 


.009 


.009 


.010 


36 


.007 


.008 


.009 


.009 


.010 


.Oil 


.Oil 


.012 


.013 


.013 


38 


.009 


.010 


.Oil 


.012 


.013 


.014 


.014 


.015 


.016 


.017 


40 


.oil 


.012 


.013 


.015 


.016 


.017 


.018 


.019 


.020 


.021 


42 


— 0.013 


—0.015 


—0.016 


— 0.017 


— 0.018 


— 0.020 


— 0.021 


— 0.022 


— 0.023 


— 0.024 


44 


.015 


.017 


.018 


.019 


.021 


.022 


.024 


.025 


.026 


.028 


46 


.017 


.019 


.020 


.022 


.024 


.025 


.027 


.028 


.030 


.031 


48 


.019 


.021 


•02 3 


.025 


.026 


.028 


.030 


.032 


•033 


•035 


50 


.021 


.023 


.025 


.027 


.029 


.031 


•033 


•035 


•037 


•039 


52 


—0.023 


—0.025 


— 0.027 


—0.030 


—0.032 


—0.034 


—0.036 


—0.038 


— 0.040 


— 0.042 


54 


.025 


.028 


.030 


.032 


•034 


•037 


•039 


.041 


.044 


.046 


56 


.027 


.030 


.032 


•035 


•037 


.040 


.042 


•045 


.047 


.050 


58 


.029 


.032 


•035 


•037 


.040 


•043 


•045 


.048 


.051 


•053 


60 


.031 


•034 


•037 


.040 


.042 


•045 


.048 


.051 


■054 


•057 


62 


—0.033 


—0.036 


—0.039 


— 0.042 


—0.045 


— 0.048 


—0.051 


—0.054 


—0.057 


— 0.060 


64 


•035 


.038 


.042 


•045 


.048 


.051 


•054 


.058 


.061 


.064 


66 


•037 


.041 


•044 


.048 


.051 


•054 


•057 


.061 


.064 


.068 


68 


•039 


•043 


.046 


.050 


•053 


•057 


.061 


.064 


.068 


.071 


70 


.041 


•045 


.049 


.052 


.056 


.060 


.064 


.067 


.071 


•075 


72 


—0.043 


—0.047 


—0.051 


—0.055 


—0.059 


—0.063 


— 0.067 


— 0.071 


—0.075 


—0.078 


74 


•045 


.049 


.053 


•057 


.061 


.065 


.070 


.074 


.078 


.082 


76 


.047 


.051 


.056 


.060 


.064 


.068 


•073 


.077 


.081 


.086 


78 


.049 


•054 


.058 


.062 


.067 


.071 


.076 


.080 


.085 


.089 


80 


.051 


.056 


.060 


•065 


.070 


.074 


.079 


.084 


.088 


•093 


82 


—0.053 


—0.058 


—0.063 


—0.067 


— 0.072 


—0.077 


— 0.082 


— 0.087 


— 0.092 


— 0.096 


84 


•055 


.060 


•065 


.070 


•075 


.080 


.085 


.090 


•095 


.100 


86 


•057 


.062 


.067 


•073 


.078 


.083 


.088 


.093 


.098 


.104 


88 


•059 


.064 


.070 


•075 


.080 


.086 


.091 


.096 


.102 


.107 


90 


.061 


.066 


.072 


.078 


.083 


.089 


.094 


.100 


.105 


.III 


92 


—0.063 


— 0.069 


—0.074 


— 0.080 


—0.086 


—0.092 


—0.097 


—0.103 


— 0.109 


— O.I 14 


94 


.065 


.071 


.077 


.083 


.089 


•095 


.100 


.106 


.112 


.118 


96 


.067 


•073 


.079 


.085 


.091 


.097 


.103 


.109 


•115 


.122 


98 


.069 


•075 


.081 


.088 


.094 


.100 


.106 


•113 


.119 


•125 


100 


.071 


.077 


.084 


.090 


.097 


.103 


.109 


.116 


.122 


.129 



Smithsonian Tables 



Table 47. 
REDUCTION OF THE MERCURIAL COLUMN TO STANDARD TEMPERATURE. 

METRIC MEASURES 
Table reconstructed from Table 45 to adapt it to U-shaped manometers with brass scales. 
For temperatures above 0°C., the correction is to be subtracted; for temperatures below, 

added. 





Difference in height of 


THE TWO COLUMNS 


I. E., 


THE ALGEBRAIC 




Attached 


DIFFERENCE 


OF THEIR RE.A.DINGS 


(mm. 


. 








thermometer 
















20 


40 60 


80 


100 


120 


140 


160 


180 


200 


220 


240 




C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0° 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 




I 


.0 


.0 


.0 


.0 


.0 


.0 


.0 


.0 


.0 


.0 


.0 


.0 




2 


.0 


.0 


.0 


.0 


.0 


.0 


.0 


.1 


.1 


.1 


.1 


.1 




3 


.0 


.0 


.0 


.0 


.0 


.1 


.1 


.1 


.1 


.1 


.1 


.1 




4 


.0 


.0 


.0 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.2 




5 


0.0 


0.0 


0.0 


O.I 


O.I 


O.I 


O.I 


O.I 


O.I 


0.2 


0.2 


0.2 




6 


.0 


.0 




.1 




.1 


.1 


.2 


.2 


.2 


.2 


.2 




7 


.0 


.0 




.1 




.1 


.2 


.2 


.2 


.2 


•3 


•3 




8 


.0 






.1 




.2 


.2 


.2 


.2 


•3 


•3 


•3 




9 


.0 






.1 




.2 


.2 


.2 


•3 


•3 


■3 


•4 




10 


0.0 


O.I 


O.I 


O.I 


0.2 


0.2 


0.2 


0.3 


0.3 


03 


0.4 


0.4 




II 


.0 






.1 


.2 


.2 


•3 


•3 


•3 


•4 


•4 


•4 




12 


.0 






.2 


.2 


.2 


•3 


■3 


•4 


•4 


•4 


•5 




13 


.0 






.2 


.2 


•3 


•3 


•3 


•4 


•4 


•5 


•5 




14 


.0 






.2 


.2 


•3 


•3 


•4 


•4 


•5 


•5 


•5 




15 


0.0 


O.I 


0.1 


0.2 


0.2 


0.3 


0-3 


0.4 


0.4 


0-5 


0-5 


0.6 




16 


.1 




.2 


.2 


•3 


•3 


•4 


•4 


•5 


•5 


.6 


.6 




17 


.1 




.2 


.2 


•3 


•3 


•4 


•4 


•5 


.6 


.6 


•7 




18 


.1 




.2 


.2 


•3 


•4 


•4 


•5 


•5 


.6 


.6 


•7 




19 


.1 




.2 


.2 


•3 


•4 


•4 


•5 


.6 


.6 


■7 


•7 




20 


O.I 


O.I 


0.2 


0.3 


0.3 


0.4 


0-5 


0.5 


0.6 


0.7 


0.7 


0.8 




21 


.1 




.2 


■3 


•3 


•4 


•5 


•5 


.6 


•7 


.8 


.8 




22 


.1 




.2 


•3 


•4 


■4 


•5 


.6 


.6 


•7 


.8 


•9 




23 


.1 




.2 


•3 


•4 


•4 


•5 


.6 


•7 


•7 


.8 


•9 




24 


.1 


.2 


.2 


•3 


•4 


•5 


•5 


.6 


•7 


.8 


■9 


•9 




25 


O.I 


0.2 


0.2 


0.3 


0.4 


0-5 


0.6 


0.7 


0.7 


0.8 


0.9 


I.O 




26 


.1 


.2 


•3 


•3 


•4 


•5 


.6 


•7 


.8 


.8 


•9 


I.O 




27 


.1 


.2 


•3 


•4 


•4 


■5 


.6 


•7 


.8 


•9 


I.O 


I.I 




28 


.1 


.2 


•3 


•4 


•5 


•5 


.6 


•7 


.8 


•9 


I.O 


I.I 




29 


.1 


.2 


•3 


•4 


•5 


.6 


•7 


.8 


.8 


•9 


I.O 


I.I 




30 


O.I 


0.2 


0-3 


0.4 


0.5 


0.6 


0.7 


0.8 


0.9 


I.O 


I.I 


1.2 




31 


.1 


.2 


•3 


■4 


•5 


.6 


•7 


.8 


•9 


I.O 


I.I 


1.2 




32 


.1 


.2 


•3 


•4 


•5 


.6 


•7 


.8 


•9 


I.O 


I.I 


1.2 




33 


.1 


.2 


•3 


•4 


•5 


.6 


.8 


•9 


I.O 


I.I 


1.2 


1-3 




34 


.1 


.2 


•3 


•4 


.6 


•7 


.8 


•9 


I.O 


I.I 


1.2 


1-3 





Smithsonian Tables 



125 



Table 47. 

REDUCTION OF THE MERCURIAL COLUMN TO STANDARD TEMPERATURE. 

METRIC MEASURES 

Table reconstructed from Table 45 to adapt it to U-shaped manometers with brass scales. 
For temperatures above 0°C., the correction is to be subtracted; for temperatures below, 

added. 



■"■s 




Difference in height of the two columns, i. 


E., THE ALGEBRAIC 






£ E 

c. 








difference of their 


READINGS (mm.). 










260 


280 


300 


320 


340 


360 


380 


400 


420 


440 


460 


480 


500 




mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0° 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 


0.0 




I 


.0 


.0 


.0 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.1 




2 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.1 


.2 


.2 


.2 




3 


.1 


.1 


.1 


.2 


.2 


.2 


.2 


.2 


.2 


.2 


.2 


.2 


.2 




4 


.2 


.2 


.2 


.2 


.2 


.2 


.2 


•3 


•3 


•3 


•3 


•3 


•3 




5 


0.2 


0.2 


0.2 


0.3 


•03 


0.3 


0.3 


0.3 


0.3 


0.4 


0.4 


0.4 


0.4 




6 


•3 


•3 


•3 


•3 


•3 


•4 


•4 


•4 


•4 


•4 


■5 


•5 


•5 




7 


■3 


•3 


•3 


•4 


•4 


•4 


•4 


•5 


•5 


•5 


•5 


•5 


.6 




8 


•3 


■4 


•4 


•4 


•4 


•5 


•5 


•5 


•5 


.6 


.6 


.6 


•7 




9 


•4 


■4 


•4 


•5 


•5 


•5 


.6 


.6 


.6 


.6 


•7 


•7 


•7 




10 


0.4 


0.5 


0.5 


0.5 


0.6 


0.6 


0.6 


0.7 


0.7 


0.7 


0.8 


0.8 


0.8 




II 


•5 


■5 


■5 


.6 


.6 


.6 


•7 


•7 


.8 


.8 


.8 


•9 


•9 




12 


•5 


•5 


.6 


.6 


•7 


•7 


•7 


.8 


.8 


•9 


•9 


•9 


1.0 




13 


■5 


.6 


.6 


•7 


•7 


.8 


.8 


.8 


•9 


•9 


1.0 


1.0 


I.I 




14 


.6 


.6 


•7 


•7 


.8 


.8 


•9 


•9 


1.0 


1.0 


1.0 


I.I 


I.I 




15 


0.6 


0.7 


0.7 


0.8 


0.8 


0.9 


0.9 


1.0 


1.0 


I.I 


I.I 


1.2 


1.2 




16 


•7 


•7 


.8 


.8 


•9 


•9 


1.0 


1.0 


I.I 


I.I 


1.2 


1.2 


1-3 




17 


•7 


.8 


.8 


•9 


•9 


1.0 


I.I 


I.I 


1.2 


1.2 


1-3 


1-3 


1.4 




18 


.8 


.8 


•9 


•9 


1.0 


I.I 


I.I 


1.2 


1.2 


1-3 


1-3 


1.4 


1-5 




19 


.8 


•9 


•9 


1.0 


I.I 


I.I 


1.2 


1.2 


1-3 


1.4 


1.4 


1-5 


1-5 




20 


0.8 


0.9 


1.0 


1.0 


I.I 


1.2 


1.2 


1-3 


1.4 


1.4 


1-5 


1.6 


1.6 




21 


•9 


1.0 


1.0 


I.I 


1.2 


1.2 


1-3 


1.4 


1.4 


1-5 


1.6 


1.6 


1-7 




22 


•9 


1.0 


I.I 


I.I 


1.2 


1-3 


1.4 


1.4 


1-5 


1.6 


1.6 


1-7 


1.8 




23 


i.o 


1.0 


I.I 


1.2 


1-3 


1-3 


1.4 


1-5 


1.6 


1.6 


1-7 


1.8 


1-9 




24 


i.o 


I.I 


1.2 


1.2 


1-3 


1.4 


1-5 


1.6 


1.6 


1-7 


1.8 


1-9 


1-9 




25 


1. 1 


I.I 


1.2 


1-3 


1.4 


1-5 


r-5 


1.6 


1-7 


1.8 


1-9 


2.0 


2.0 




26 


1. 1 


1.2 


1-3 


1.4 


1.4 


1-5 


1.6 


1-7 


1.8 


1-9 


1-9 


2.0 


2.1 




27 


I.I 


1.2 


1-3 


1.4 


1-5 


1.6 


1-7 


1.8 


1.8 


1-9 


2.0 


2.1 


2.2 




28 


1.2 


1-3 


1.4 


1-5 


1-5 


1.6 


1-7 


1.8 


1-9 


2.0 


2.1 


2.2 


2.3 




29 


1.2 


1-3 


1.4 


1-5 


1.6 


1-7 


1.8 


1.9 


2.0 


2.1 


2.2 


2-3 


2.4 




30 


1-3 


1.4 


1-5 


1.6 


1-7 


1.8 


1.9 


2.0 


2.0 


2.1 


2.2 


2.3 


2.4 




31 


1-3 


1.4 


1-5 


1.6 


1-7 


1.8 


1-9 


2.0 


2.1 


2.2 


2.3 


2.4 


2-5 




32 


1.4 


1-5 


1.6 


1-7 


1.8 


1-9 


2.0 


2.1 


2.2 


2-3 


2.4 


2.5 


2.6 




33 


1.4 


1-5 


1.6 


1-7 


1.8 


1-9 


2.0 


2.1 


2.2 


2.4 


2.5 


2.6 


2.7 




34 


1.4 


1-5 


1-7 


1.8 


1.9 


2.0 


2.1 


2.2 


2.3 


2.4 


2.5 


2.6 


2.8 





Smithsonian Tables 



126 



Table 48. 
CORRECTIONS TO REDUCE BAROMETRIC READINGS TO STANDARD 

GRAVITY. 

{g'-go) 



C= 



■B 



(WITH E/<go THE CORRECTION IS TO BE SUBTRACTED; WITH g/>go IT IS TO BE ADDED.) 











BAROMETER READING B. 








gi—go 






















1.0 


2.0 


3.0 


4.0 


5.0 


6.0 


7.0 


8.0 


;o 


10.0 


Dynes. 






















0.1 


O.OOOIO 


0.00020 


0.0003 1 


0.00041 


0.00051 


0.00061 


0.00071 


0.00082 


0.00092 


0.00102 


0.2 


00020 


00041 


00061 


00082 


00102 


00122 


00143 


00163 


00184 


00204 


0.3 


00031 


00061 


00092 


00122 


OOIS3 


00184 


00214 


0024s 


0027s 


00306 


0.4 


00041 


00082 


00122 


00163 


00204 


00245 


00286 


00326 


00367 


00408 


0.5 


00051 


00102 


00153 


00204 


00255 


00306 


00357 


00408 


00459 


00510 


0.6 


0.00061 


0.00122 


0.00184 


0.00245 


0.00306 


0.00367 


0.00428 


0.00489 


0.00551 


0.00612 


0.7 


00071 


00143 


00214 


00286 


00357 


00428 


00500 


00571 


00642 


00714 


0.8 


00082 


00163 


00245 


00326 


00408 


00489 


00571 


00653 


00734 


00816 


0.9 


00092 


00184 


00275 


00367 


00459 


00551 


00642 


00734 


00826 


00918 


I.O 


00102 


00204 


00306 


00408 


00510 


00612 


00714 


00816 


00918 


01020 


l.t 


O.OOII2 


0.00224 


0.00337 


0.00449 


0.00561 


0.00673 


0.00785 


0.00897 


0. OIOIO 


O.OII22 


1.2 


00122 


00245 


00367 


00489 


00612 


00734 


00857 


00979 


OIIOI 


01224 


1-3 


00133 


00265 


00398 


00530 


00663 


00795 


00928 


01061 


01 193 


01326 


1.4 


00143 


00286 


00428 


00571 


00714 


00857 


00999 


01142 


01285 


01428 


i-S 


00153 


00306 


00459 


00612 


00765 


00918 


01071 


01224 


01377 


01530 


1.6 


0.00163 


0.00326 


0.00489 


0.00653 


0.00816 


0.00979 


0.01142 


0.01305 


0.01468 


0.01632 


1-7 


00173 


00347 


00520 


00693 


00867 


01040 


01213 


01387 


01560 


01734 


1.8 


00184 


00367 


00551 


00734 


00918 


OIIOI 


01285 


01468 


01652 


01835 


1.9 


00194 


00387 


00581 


00775 


00969 


OII62 


01356 


01550 


01744 


01937 


2.0 


00204 


00408 


00612 


00816 


01020 


01224 


01428 


01632 


01835 


02039 


2.1 


0.00214 


0.00428 


0.00642 


0.00857 


0.01071 


0.01285 


0.01499 


0.01713 


0.01927 


O.O2I4I 


2.2 


00224 


00449 


00673 


00897 


01122 


01346 


01570 


01795 


02019 


02243 


2-3 


00235 


00469 


00704 


00938 


01173 


01407 


01642 


01876 


02III 


0234s 


2.4 


00245 


00489 


00734 


00979 


01224 


01468 


01713 


01958 


02203 


02447 


2-5 


00255 


00510 


00765 


01020 


0127s 


01530 


01785 


02039 


02294 


02549 


2.6 


0.00265 


0.00530 


0.00795 


0.01061 


0.01326 


0.0 1 59 1 


0.01856 


0.02121 


0.02386 


0.02651 


2.7 


00275 


00551 


00826 


OIIOI 


01377 


01652 


01927 


02203 


02478 


02753 


2.8 


00286 


00571 


00857 


OII42 


01428 


01713 


01999 


02284 


02570 


02855, 


2.9 


00296 


00591 


00887 


01 183 


01479 


01774 


02070 


02366 


02661 


02958, 


3-0 


00306 


00612 


00918 


01224 


01530 


01835 


02141 


02447 


02753 


03059 


3.1 


0.00316 


0.00632 


0.00948 


0.01264 


0.01581 


0.01897 


0.02213 


0.02529 


0.02845 


0.03 161 


3-2 


00326 


00653 


00979 


01305 


01632 


01958 


02284 


02610 


02937 


03263 


5-Z 


00337 


00673 


OIOIO 


01346 


01683 


02019 


02356 


02692 


03029 


03365 


34 


00347 


00693 


01040 


01387 


01734 


02080 


02427 


02774 


03120 


03467 


Z-S 


00357 


00714 


OI07I 


01428 


01785 


02141 


02498 


02855 


03212 


03569 


3.6 


0.00367 


0.00734 


O.OIIOI 


0.01468 


0.01835 


0.02203 


0.02570 


0.02937 


0.03304 


0.03671 


3-7 


00377 


007S5 


OII32 


01509 


01886 


02264 


02641 


03018 


03396 


03773 


3-8 


00387 


0077 s 


OII62 


01550 


01937 


02325 


02712 


03100 


03487 


0387s 


3-9 


00398 


00795 


01 193 


OI59I 


01988 


02386 


02784 


03182 


03579 


03977 


4.0 


00408 


00816 


01224 


01632 


02039 


02447 


02855 


03263 


03671 


04079 



SMITHSONIAN TABLES. 



127 



Table 49. 

REDUCTION OF THE BAROMETER TO STANDARD GRAVITY. 
ENGLISH MEASURES. 

FROM LATITUDE 0° TO 45^ THE CORRECTION IS TO BE SUBTRACTED. 



Lati- 
tude. 




HEIGHT OF THE B.AROMETER IN INCHES. 




























19 


20 


21 


22 


23 24 


25 


26 


27 


28 


29 


30 




Inch. 


. Inch. 


Inch. 


Inch, i 


Inch. Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


0° 


-0.051 


-0.054 


-0.056 


-0.059 


-0.062 


—0.064 


-0.067 


-0.070 


-0.072 


-0.075 


-0.078 


—0.080 


5 


-0.050; 


-0.053 


-0.055 


-0.058 


-0.061 


-0.063 


-0.066 


-0.069 


-0.071 


-0.074 


-0.077 


-0.079 


6 


0.050: 0.052 


0.055 


0.058 


0.060 


0.063 


0.066 


0.068 


0.071 


0.073 


0.076 


0.079 


7 


0.049! 0.052 


0.055 


0.057 


0.060 


0.062 


0.065 


0.068 


0.070 


0.073 


0.075 


0.078 


8 


0.049 ' 0.052 


0.054 


0.057 


0.059 


0.062 


0.064 


0.067 


0.07c 


0.072 0.075 


0.077 


9 


0.048 


0.051 


0.054 


0.056 


0.059 0.061 


0.064 


0.066 


0.069 


0.071 


0.074 


0.076 


10 


-0.048 


-0.050 


-0.053 


-0.055 


-0.058! -0.060 


-0.063 


—0.066 


-0.068 


-0.071 


-0.073 


-0.076 


II 


0.047 


0.050 


0.052 


0.055 


0.057 


0.060 


0.062 


0.065 


0.067 


0.070 


0.072 


0.07s 


12 


0.047 


0.049 


0.051 


0.054 


0.056 


0.059 


0.061 


0.064 


0.066 


0.069 


0.071 


0.074 


13 


0.046 


0.048 


0.051 


0.053 0.055 


0.058 


0.060 


0.063 


0.065 


0.068 


0.070 


0.072 


14 


0.045 


0.047 


0.050 


0.052 0.055 


0.057 


0.059 


0.062 


0.064 


0.066 


0.069 


0.071 


15 


-0.044 


-0.047 


—0.049 


-0.051 -0.053 


-0.056 


-0.058 


-0.060 


-0.063 


-0.065 


—0.067 


-0.070 


i6 


0.043 


0.046 


0.048 


0.050 0.052 


0.055 


0.057 


0.059 


0.062 


0.064 


0.066 


0.068 


17 


0.042 


0.045 


0.047 


0.049 0.051 


0.053 


0.056 


0.058 


0.060 


0.062 


0.065 


0.067 


i8 


0.041 


0.044 


0.046 


0.048 


0.050 


0.052 


0.054 


0.057 


0.059 


0.061 


0.063 


0.065 


19 


0.040 


0.042 


0.045 


0.047 


0.049 


0.051 


0.053 


0.055 


0.057 


0.059 


0.062 


0.064 


20 


-0.039 


-0.041 


-0.043 


-0.045 


-0.047 


-0.050 


-0.052 


-0.054 


-0.056 


-0.058 


-0.060 


-0.062 


21 


0.038 


0.040 


0.042 


0.044 


0.046 


0.048 


0.050 


0.052 


0.054 


0.056 


0.058 


0.060 


22 


0.037 


0.039 


0.041 


0.043 


0.045 


0.047 


0.049 


0.050 


0.052 


0.054 


0.056 


0.058; 


23 


0.036 


0.038 


0.039 


0.041 


0.043 


0.045 


0.047 


0.049 


0.051 


0.053 


0.054 


0.056 


24 


0.034 


0.036 


0.038 


0.040 


0.042 


0.043 


0.045 


0.047 


0.049 


0.051 


0.052 


0.054 


25 


-0.033 


-0.035 


-0.037 


-0.038 


—0.040 


-0.042 


-0.043 


-0.045 


-0.047 


-0.049 


-0.050 


-0.052 


26 


0.03 2 


0.033 


0.035 


0.037 


0.038 


0.040 


0.042 


0.043 


0.045 


0.047 


0.048 


0.050 


27 


0.030 


0.032 


0.033 


0.035 


0.037 


0.038 


0.040 


0.041 


0.043 


0.045 


0.046 


0.048 


28 


0.029 


0.030 


0.032 


0.033 


0.035 


0.036 


0.038 


0.039 


0.041 


0.043 


0.044 


0.046 


29 


0.027 


0.029 


0.030 


0.032 


0.033 


0.035 


0.036 


0.037 


0.039 


0.040 


0.042 


0.043 


30 


-0.026 


-0.027 


-0.029 


-0.030 


-0.031 


-0.033 


-0.034 


-0.035 


-0.037 


-0.038 


-0.040 


—0.041 


31 


0.024 


0.026 


0.027 


0.028 


0.030 


0.031 


0.032 


0.033 


0.035 


0.036 


0.037 


0.038 


32 


0.023 


0.024 


0.025 


0.026 


0.028 


0.029 


0.030 


0.031 


0.032 


0.034 


0.035 


0.0361 


33 


0.021 


0.022 


0.023 


0.025 


0.026 


0.027 


0.028 


0.029 


0.030 


0.031 


0.032 


0.034I 


34 


0.020 


0.021 


0.022 


0.023 


0.024 


0.025 


0.026 


0.027 


0.028 


0.029 


0.030 


0.031 


35 


-o.oiS 


-0.019 


-0.020 


-0.021 


-0.022 


-0.023 


-0.024 


-0.025 


—0.026 


-0.027 


-0.027 


-0.028 


36 


o.oib 


0.017 


0.018 


0.019 


0.020 


0.021 


0.022 


0.022 


0.023 


0.024 


0.025 


0.026 


37 


0.015 


0.015 


0.016 


0.017 


0.018 


0.019 


0.019 


0.020 


0.021 


0.022 


0.022 


0.023 


38 


0.0x3 


0.014 


0.014 


0.015 


0.016 


0.016 


0.017 


0.018 


0.018 


0.019 


0.020 


0.020 


39 


O.OII 


0.012 


0.012 


0.013 


0.014 


0.014 


0.015 


0.015 


0.016 


0.017 


0.017 


0.018 


40 


— O.OIO 


-O.OIO 


-O.OII 


—O.OII 


-0.012 


-0.012 


-0.013 


-0.013 


-0.014 


-0.014 


-0.015 


-0.015 


41 


0.008 


0.008 


0.009 


0.009 


0.009 


O.OIO 


O.OIO 


O.OII 


O.OII 


0.012 


0.012 


0.012 


42 


0.006 


0.006 


0.007 


0.007 


0.007 


0.008 


0.008 


0.008 


0.009 


0.009 


0.009 


O.OIO| 


43 


0.004 


0.005 


0.005 


0.005 


0.005 


0.005 


0.006 


0.006 


0.006 


0.006 


0.007 


0.007 


44 


0.003 


0.003 


0.003 


0.003 


0.003 


0.003 


0.0031 0.004! 0.004 


0.004 


0.004 


0.004 


.1 


-O.OOI 


-O.OOI 


-O.OOI 


-O.OOI 


-O.OOI 


-O.OOI 


-O.OOI -O.OOI -O.OOI 


— O.OOI 


-O.OOI 


— O.OOI 



Smithsonian Tables. 



128 



Table 49. 
REDUCTION OF THE BAROMETER TO STANDARD GRAVITY. 

ENGLISH MEASURES. 

FROM LATITUDE 46" TO 90^ THE CORRECTION IS TO BE ADDED. 



Lati- 
tude. 


HEIGHT OF THE B.\ROMETER IN INCHES. 




19 


20 


21 


22 


23 


24 


25 26 


1 

27 


1 
28 


29 


30 






Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


Inch. 


! 

Inch. Inch. 


Inch. 




45° 


— O.OOI — O.OOI 


-O.OOI 


-O.OOI 


-O.OOI 


— O.OOI 


-O.OOI 


-O.OOI 


-O.OOI 


-O.OOI -O.OOI 


-O.OOI 




46 


+0.001 +0.001 


+0.001 


+0.001 


+0.001 


+0.001 


+0.001 


j 
+0.001 +0.001 


+0.001 +0.001 


+0.001 




47 


0.003 [ 0.003 0.003 


0.003 0.003 


0.003 


0.003 


0.004: 0.004 


0.004; 0.004 


0.004 




48 


0.004 0.005 0.005 


0.005 0.005 


0.006 


0.006 


0.006 


0.006 


0.006 0.007 


0.007 




49 


0.006 0.006 0.007 


0.007 0.007 


0.008 


0.008 


0.008 


0.009 


0.009 0.009 


O.OIO 




50 


0.008 0.008 0.009 


0.009 o.oio 

j 


O.OIO 


O.OIOj O.OII O.OII 

1 


0.012, 0.012 


0.012 




5! 


+0.010 +0.010 J-O.OI I 


+0.01 1 +0.012 


+0.012 


! 
+0.013 +0.013 +0.014 


+0.014 +0.015 


+0.015 




52 


o.oii 0.012 0.012 


0.013 


0.014 


0.014 


0.015 0.015 


0.016 


0.016 0.017 


0.018 




S3 


0.013 0.014! 0.014 


0.015 


0.016 


0.016 


0.017, 0.018 


0.018 


o.oi9| 0.020 


0.020 




54 


0.015 0-0I5 0.016 


0.017 


0.018 0.019 


0.019 0.020 


0.021 


0.022 0.022 


0.023 




55 


0.016 0.017 0.018 


0.019 


0.020 0.021 


0.021 0.022 


0.023 


0.024, 0.025 


0.026 




56 


+0.018 +o.oiq'+o.020 


+0.021 


+0.022+0.023 


+0.024+0.024+0.026 


+0.026+0.027 


+0.028 




57 


0.020 


0.021 0.022 


0.023 


0.024 0.025 


0.026 0.027 0.028 


0.029 0.030 


0.031 




58 


0.021 


0.022 0.023 


0.025 


0.026 


0.027 


0.028 0.029 0.030 


0.031 0.032 


0-033 




59 


0.023 


0.024 0.025 


0.026 


0.028 


0.029 


0.030 0.031 0.032 


0.033! 0.035 


0.036 




60 


0.024 


0.026 0.027 


0.028 


0.029 


0.031 


0.032 0.033 0.034 


0.036 0.037 


0.038 




6! 


+0.026 


+0.027 +0.028 


+0.030 


+0.031 


+0.033 


+0.034+0.035+0.037 


+0.038+0.030 


J-0.041 




62 


0.027 


0.029^ 0.030 


0.032 


0-033 


0-034 


0.036 


0.037 0.039 


0.040 0.042 


0.043 




63 


0.02Q 


0.030 0.032 


0.033 


0.035 


0.036 


0.038 


0.030 0.041 


0.042 0.044 


0.045 




64 


0.030 


0.032, 0.033 


0-035 


0.036 


0.038 


0.040 


0.041 0.043 


0.044 0.046 


0.047 




65 


0.03 I 


0.033 0.035 


0.036 


0.038 


0.040 


0.041 


0.043 0.04s 


0.046 0.048 


0.050 




66 


+0.033 


+0.034 +0.036 


+0.038 


+0.040 


+0.041 


+0.043 


+0.045 +0.047 


+0.04S +0.050 


+0.052 




67 


0.034 


0.036 0.038 


0.039 


0.041 


0.043 


0.045 


0.047 0.048 


0.050 


0.052 


0.054 




68 


0.03s 


0.03 7 j 0.039 


0.041 


0.043 


0.04s 


0.046 


0.048 0.050 


0.052 


0.054 


0.056 




69 


0.036 


0.038 0.040 


0.042 


0.044 


0.046 


0.048 


0.050 0.052 


0-054 


0.056 


0.058 




70 


0.038 


0.040 0.042 


0.044 


0.046 


0.048 


0.050 


0.052 0.053 


0-055 


0.057 


0.059 




71 


+0.039 


+0.041 +0.043 


+0.045 


+0.047 


+0.049 


+0.051 


+0.053 +0.055 


+0.057 


+0.059 


+0.061 




72 


0.040 


0.042 0.044 


0.046 


0.048 


0.050 


0.052 


0.054 0.057 


0.059 


0.061 


0.063 




73 


0.041 


0.043 0.04s 


0.047 


0.049 


0.052 


0.054 


0.056, 0.058 


0.060 0.062 


0.064 




74 


0.042 


0.044' 0.046 


0.048 


0.051 


0-053 


0-055 


0-0S7; 0.059 


0.062 0.064 


0.066 




75 


0.043 


0.045 0.047 


0.049 


0.052 


0-054 


0.056 


0.058! 0.061 

i 


0.063 


0.065 


0.067 




76 


+0.044 


+0.046 +0.048 


+0.050 


+0.053 


+0-055 


+0.057 


+0.060 1+0.06 2 


+0.064 


+0.066 


+0.069 




77 


0.044 


0.047 0.049 


0.051 


0.054 


0.056 


0.058 


0.061 0.063 


0.065 0.068 


0.070 




78 


0.04s 


0.047 


0.050 


0.052 


0-055 


0.057 


0.059 


0.062 0.064 


0.066 


0.069 


0.071 




79 


0.046 


0.048 


0.051 


0-053 


0-055 


0.058 


0.060 


0.063 


0.065 


0.067 


0.070 


0.072 




80 


0.046 


0.049 


0.051 


0.054 


0.056 


0-059 


0.061 


0.063 


0.066 


0.068 


0.071 


0-073 




81 


+0.047 


+0.049 


+0.052 


+0.054 


+0.057 


+0-059 


+0.062 


+0.064 


+0.067 


+0.060 


+0.072 


+0.074 




82 


0.047 


0.050 


0.052 


0-055 


0-057 


0.060 


0.062 


0.065 


0.067 


0.070; 0.072 


0-075 




83 


0.048 


0.050 


0.053 


0.056 


0-058 


0.061 


0.063 


0.066 


0.06S 


0.071 


0.073 


0.076 




84 


0.048 


0.051 


O.OS3 


0.056 


0-059 


0.061 


0.064 


0.066 


0.069 


0.071 


0.074 


0.076 




85 


0.049 


0-051 


0.054 


0.056 


0.059 


0.061 


0.064 


0.067 


0.069 


0.072 


0.074 


0.077 




90 


+0.049 


+0.052 


+0.055 


+0-057 


+0.060 


+0.062 


+0.065 


+0.068 


+0.070 


+0.073 


+0.075 


+0.078 









Smithsonian Tables. 



129 



Table 50. 

REDUCTION OF THE BAROMETER TO STANDARD GRAVITY. 

METRIC MEASURES. 

FROM LATITUDE 0° TO 45^ THE CORRECTION IS TO BE SUBTRACTED. 





HEIGHT OF THE BAROMETER IN MILLIMETERS. 






Lati- 
tude. 








































520 


540 


560 


580 


600 


620 


640 


660 


680 


700 


720 

mm. 


740 

mm. 


760 

mm. 


780 




mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 




0° 


-1-39 


-1-45 


-1.50 


-1-55 


-1.61 


-1.66 


-1. 71 


-1.77 


-1.82 


-1.87 


-1-93 


-1.98 


— 2.04 


-2.09 




5 


-1-37 


-1.42 


-1.48 


-1-53 


-i.S8 


-1.64 


-1.69 


-1.74 


-1.79 


-1.85 


-1.90 


-1-95 


-2.00 


-2.06 




6 


1.36 


1.42 


1.47 


1.52 


I-S7 


1.63 


1.68 


1-73 


1.78 


1.83 


1.89 


1.94 


1.99 


2.04 




7 


1-35 


1.40 


1.46 


I-5I 


i.S6 


1.61 


1.66 


1.72 


1.77 


1.82 


1.87 


. 1.92 


1.98 


2.03 




8 


1-34 


1-39 


1.44 


1.49 


i-SS 


1.60 


i.6s 


1.70 


I-7S 


1.80 


1.85 


1.91 


1.96 


2.01 




9 


1-33 


1.38 


1-43 


1.48 


1-53 


X.58 


1.63 


1.68 


1-73 


1.78 


1.84 


1.89 


1.94 


1.99 




10 


-I-3I 


-1.36 


-1.41 


-1.46 


-i-Si 


-1.56 


-1.61 


-1.66 


-1. 71 


-1.76 


-1.81 


-1.86 


-1.92 


-1.97 




11 


1.29 


1-34 


1-39 


1.44 


1.49 


1-54 


1-59 


1.64 


1.69 


1.74 


1.79 


1.84 


1.89 


1.94 




i 12 


1.27 


1-32 


1-37 


1.42 


1.47 


1-52 


1-57 


1.62 


1.67 


1.72 


1.76 


1.8: 


1.86 


1.91 




13 


1. 25 


1.30 


1-35 


1.40 


1-45 


I. SO 


1-54 


1-59 


1.64 


1.69 


1.74 


1.78 


1.83 


1.88 




14 


1.23 


1.28 


^■33 


1.38 


1.42 


1.47 


1-52 


1.56 


1.61 


1.66 


1. 71 


I-7S 


1.80 


i.8s 




15 


-1. 21 


-1.26 


-1.30 


-1-35 


- 1 .40 


-1.44 


-1.49 


-1-54 


-1.58 


-1.63 


-1.67 


-1.72 


-1.77 


-1.81 




16 


1. 19 


1.23 


1.28 


1.32 


1-37 


1.41 


1.46 


I-50 


1-55 


1.60 


1.64 


1.69 


1-73 


1.78 




17 


1. 16 


1.20 


1-25 


1.29 


1-34 


1.38 


1-43 


1.47 


1.52 


i.S6 


1.60 


i.6s 


1.69 


1.74 




18 


1-13 


1. 18 


1.22 


1.26 


I-3I 


1-35 


1-39 


1.44 


1.48 


1-52 


I-S7 


1.61 


i.6s 


1.70 




19 


1. 10 


I-I5 


1. 19 


1.23 


1.27 


1-32 


1.36 


1.40 


1.44 


1.48 


1-53 


1-57 


1.61 


1. 65 




20 


-1.07 


-I. II 


-1. 16 


-1.20 


-1.24 


-1.28 


-1.32 


-1.36 


-1.40 


-1.44 


-1.49 


-1-53 


-I-S7 


-1.61 




21 


1.04 


1.08 


1. 12 


1. 16 


1.20 


1.24 


1.28 


1.32 


1.36 


1.40 


1.44 


1.48 


1.52 


i.S6 






1. 01 


I. OS 


1.09 


1-13 


1. 16 


1.20 


1.24 


1.28 


1.32 


1.36 


1.40 


1.44 


1.48 


i-Si 




23 


0.98 


I.OI 


I. OS 


1.09 


1-13 


1. 16 


1.20 


1.24 


1.28 


I-3I 


1-35 


1-39 


1-43 


1.46 




24 


0.94 


0.98 


I.OI 


1.05 


1.08 


1. 12 


1. 16 


1. 19 


1.23 


1.27 


1.30 


1-34 


1-37 


1.41 




25 


-0.90 


-0.94 


-0.97 


-I.OI 


-1.04 


-1.08 


-I. II 


-i-iS 


-1. 18 


-1.22 


-1.25 


-1.29 


-1.32 


-1.36 




26 


0.87 


0.90 


0.93 


0.97 


1. 00 


1.03 


1.07 


1. 10 


I-I3 


1. 17 


1.20 


1.23 


1.27 


1.30 




27 


0.83 


0.86 


0.89 


0.92 


0.96 


0.99 


1.02 


I -OS 


1.08 


1. 12 


I-I5 


1. 18 


1. 21 


1.24 




28 


0.79 


0.82 


0.8s 


0.88 


0.91 


0.94 


0.97 


1. 00 


1.03 


1.06 


1.09 


1. 12 


I-I5 


1. 18 




29 


0-75 


0.78 


0.81 


0.84 


0.86 


0.89 


0.92 


0.95 


0.98 


I.OI 


1.04 


1.07 


1. 10 


1. 12 




30 


-0.71 


-0.74 


-0.76 


-0.79 


-0.82 


-0.85 


-0.87 


—0.90 


-0.93 


-0.95 


-0.98 


-I.OI 


-1.04 


-1.06 




31 

32 


0.67 


0.69 


0.72 


0.74 


0.77 


0.80 


0.82 


0.85 


0.87 


0.90 


0.92 


0-9S 


0.98 


1. 00 




0.62 


0.65 


0.67 


0.70 


0.72 


0.74' 0.77 


0.79 


0.82 


0.84 


0.86 


0.89 


0.91 


0.94 




0.58 


0.60 


0.63 


0.65 


0.67 


0.691 0.72 


0.74 


0.76 


0.78 


0.80 


0.83 


0.8s 


0.87 




JO 

34 


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 




35 


-0.49 


-0.51 


-O.S3 


-0.55 


-O.S7 


-O.S9 


-0.61 


-0.63 


-0.64 


-0.66 


-0.68 


-0.70 


-0.72 


-0.74 




1 3O 


0.45 


0.46 


0.48 


0.50 O.S2 


O.S3 


O.S5 


0.57 


o.s8 


0.60 


0.62 


0.64 


0.6s 


0.67 




37 


0.40 


0.42 


0.43 


0.45 0.46 


0.48 


0.49 


o.si 


0.52 


0.54 


0.56 


0.57 


0-59 


0.60 




38 


0.36 


0.37 


0.38 


0.40 0.41 


0.42 


0.44 


0.45 


0.46 


0.48 


0.49 


0.51 


O.S2 


0.53 




39 


0.31 


0.32 


0.33 


0.34 0.36 


0.37 


0.38 


0-39 


0.40 


0.42 


0.43 


0.44 


0-45 


0.46 




40 


-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 




41 


0.21 


0.22 


0.2.3 


0.24 0.2s 


0.26 0.26 


0.27 


0.28 


0.29 


0.30 


0.30 


0.31 


0.32 




42 
43 
44 


O.I7 


0.17 


0.18 


0.19 0.19 


0.20 0.21 


0.21 


0.22 


0.22 


0.23 


0.24 


0.24 


0.2s 




0.12 


0.12 


0.13 


0.13 0.14 


0.14! 0.15 


o.is 


0.16 


0.16 


0.16 


0.17 


0.17 


0.18 




0.07 


0.07 


0.08 


0.08 0.08 


0.08 


0.09 


0.09 


0.09 


O.IO 


O.IO 


O.IO 


O.IO 


O.II 




45 


-0.02 


—0.02 


-0.03 


-0.03 -0.03 


-0.03 


-0.03 


—6.03 


-0.03 


-0.03 


-0.03 


-0.03 


-0.03 


-0.04 





Smithsonian Tables. 



130 



Table 50, 
REDUCTION OF THE BAROMETER TO STANDARD GRAVITY. 

METRIC MEASURES. 

FROM LATITUDE 46° TO 90", THE CORRECTION IS TO BE ADDEO. 



Lati- 
tude. 


HEIGHT OF THE BAROMETER IN MILLIMETERS. 


520 


540 


560 


580 


600 


620 


640 


660 


680 

mm. 


700 


720 


740 


760 


1 
780 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


1 . 

mm. I 


45° 


-0.02 


-0.02 


-0.03 


-0.03 


-0.03 


—0.03 


-0.03 


-0.03 


-0.03 


-0.03 


-0.03 


-0.03 


-0.03 


-0.04 


46 


^-o.o2 


+0.03 


+0.03 


+0.03 


+0.03 


+0.03 


+0.03 


+0.03 


+0.03 


+0.03 


+0.03 


+0.03 


+0.04 


+0.04 


47 


0.07 


0.08 


0.08 


0.08 


0.08 


0.09 


0.09 


0.09 


0.09 


O.IO 


O.IO 


O.IO 


O.IO 


O.II 


48 


0.12 


0.12 


0.13 


0.13 


0.14 


O.I^ 


; 0-15 


0.15 


0.16 


0.16 


0.17 


0.17 


0.18 


0.18 


49 


0.17 


0.17 


0.18 


0.19 


0.19 


0.20 


0.21 


0.21 


0.22 


0.23 


0.23 


0.24 


0.25 


0.25 


50 


0.22 


0.22 


0.23 


0.24 


0.25 


0.26 


0.26 


0.27 


0.28 


0.29 


0.30 


0.31 


0.31 


0.32 


51 


+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 


S^ 


0.31 


0.32 


0.33 


0-34 


0.36 


0.37 


0.38 


0.39 


0.40 


0.42 


043 


0.44 


04s 


0.46 


53 


0.36 


0.37 


0.38 


0.40 


0.41 


0.42 


0.44 


0.45 


0.46 


0.48 


0.49 


0.51 


0.52 


0.53 


54 


0.40 


0.42 


0.43 


045 


0.46 


0.48 


0.49 


0.51 


0.52 


0-S4 


0.56 


0-57 


0.59 


0.60 


55 


0.45 


0.46 


0.48 


0.50 


0.52 


0-53 


0-55 


0.57 


0.58 


0.60 


0.62 


0.64 


0.65 


0.67 


56 


+0.49 


+0.51 


+0.53 


+0.55 


+0.57 


+0.59 


+0.60 


+0.62 


+0.64 


+0.66 


+0.68 


+0.70 


+0.72 


+0.74 


57 


0.54 


0.56 


0.58 


0.60 


0.62 


0.64 


0.66 


0.68 


0.70 


0.72 


0.74 


0.76 


0.78 


0.80 


58 


0.58 


0.60 0.62 


0.65 


0.67 


0.69 


0.71 


0.74 


0.76 


0.78 


0.80 


0.82 


0.85 


0.87 


59 


0.62 


0.65 0.67 


0.69 


0.72 


0.74 


0.77 


0.79 


0.81 


0.84 


0.86 


0.89 


0.91 


0.93 


60 


0.66 


0.69 0.72 


0.74 


0.77 


0.79 


0.82 


0.84 


0.87 


0.89 


0.92 


0.94 


0.97 


I.OO 


61 


+0.71 


+0.73 +0.76 


+0.79 


+0.81 


+0.84 


+0.87 


+0.89 


+0.92 


+0.95 


+0.98 


+1.00 


+1.03 


+1.06 


62 


0.74 


0.77, 0.80 


0.83 


0.85 


0.88 


0.91 0.94 


0.97 


I.OO, 1.02 


1.05 


1.08 


I. II 


63 


0.78 


0.81 0.85 


0.88 


0.91 


0.94 


0.97, I.OO 


1.03 


1.061 1.09 


1. 12 


1-15 


I.I8 


64 


0.82 


0.85 0.89 


0.92 


0-95 


0.98 


i.oi 1.04 


1.08 


I. II 1. 14 


1. 17 


1.20 


1.23 


65 


0.86 0.89 0.93 


0.96 


0.99 


1.03 


1.06; 1.09 


I-I3 


1. 16 1. 19 


1.22 


1.26 


1.29 


66 


+0.90+0.93+0.97 


+ 1.00 


+1.04 


+1.07 


+ I.IO 


+ 1.14 


+1.17 


+I.2II+I.24 


+1.28 


+1.31 


+1-35 


67 


0.93 0.97I I.OO 


1.04 


1.08 


I. II 


I-I5 


1. 18 


1.22 


1. 25 1.29 


1-33 


1.36 


1.40 


68 


0.97, I.OO 1.04 


1.08 


I. II 


I-I5 


1. 19 


1.23 


1.26 


1.30 


1-34 


1-37 


1.41 


145 


69 


I.OO 1.04 1.08 


I. II 


I-I5 


1. 19 


1.23 


1.27 


I-3I 


1-34 


1.38 


1.42 


1.46 


1.50 


70 


1.03 1.07 I. II 


I-I5 


1.19 


1.23 


1.27 


I-3I 


1-35 


1-39 


143 


1.47 


I-5I 


1-55 


71 


+1.06 +I.IO +1.14 


+ 1.18 


+1.22 


+1.26 


+1.31 


+ 1-35 


+1-39 


+1-43 


+147 


+1.51 


+1-55' 


+1-59 


72 


1.09; 1. 13 1. 17 


1.22 


1.26 


1.30 


1-34 


1.38 


1.42 


1.47 


I-5I 


1-55 


1-59 


1.63 


73 


1. 12 1. 16 1.20 


1-25 


1.29 


1-33 


1-37 


1.42 


1.46 


1.50 


1-55 


1-59 


1.63 


1.67 


74 


1. 14 1. 19 1.23 


1.28 


1.32 


1.36 


1.41 


1-45 


1.50 


1-54 


1.58 


1.63 


1.67 


1.72 


75 


1. 17 1. 21 1.26 


1.30 


1-35 


1-39 


1.44 


1.48 


1-53 


1-57 


1.62 


1.66 


I-7I 


1-75 


76 


+ I.I9 +1.24 +1.28 


+^■33 


+1-37 


+ 1.42 


+ 1-47 


+ 1-51 


+1.56 


+ 1.60 


+1.65 


+1.70 


+1-74' 


+ 1-79 


77 


I.2Ij 


1.26 


I-3I 


1-35 


1.40 


1-45 


1.49 


1-54 


1-59 


1.63 


1.68 


1-73 


i-77i 


1.82 


78 


1.23 


1.28 


•^■33 


1.38 


1.42 


1.47 


1-52 


1-57 


1.61 


1.66 


1. 71 


1.76 


1.80 


1.85 


79 


1-25 


1.30 


1-35 


1.40 


1-45 


1.49 


1-54 


1-59 


1.64 


1.69 


1-73 


1.78 


1.83 


1.88 


80 


1.27 


1-32 


1-37 


1.42: 


.147 


I-5I 


1.56 


1.61 


1.66 


1. 71 


1.76 


1.81 


1.86: 

1 


1.90 


81 


+ 1.29 


+ 1-33 +1-38 


+1-43 


+ 1.48 


+1.53 


+1.58 


+1.63 


+1.68 


+1-73 


+1.78 


+1.83 


+1.88^ 


+ 1-93 


82 


1.30 


1-35 


1.40 


1-45 


1.50 


1-55 


1.60 


1.65 


1.70 


1-75 


1.80 


1.85 


1.90 


1-95 


83 


I-3I 


1.36 


1.41 


1.46 


I-5I 


1.56 


1.61 


1.67 


1.72 


1.77 


1.82 


1.87 


1.92, 


1.97 


84 


1.32 


1-37 


1.42 


1.48 


1-53 


1.58 


1.63 1.68 


1-73 


1.78 


1.83 


1.88 


1-93; 


1.98 


85 


1-33 


1.38 


1-43 


1.49 


1-54 


I-S9 


1.64 1.69 


1.74 


1.79 


1.84 


1.90 


1-95 


2.00 


90 


+1-35 


+ 1.41 


+1.46, 


+ 1.51 


+1.56 


+1.61 


+ 1.67 +1.72 


+1-77 


+1.82 


+1.87 

1 


+1-93 


+1.98' 


1 
+ 2.03 



Smithsonian Tables. 



131 



TABLES FOR DETERMINING HEIGHTS. AND CONVERSIONS INVOLVING 

GEOPOTENTIAL 

Determination of heights hy the barometer. EngHsh measures. 

Values of 60368 (1+0.0010195x36) log ~— .... Table 51 

b 

Term for temperature Table 52 

Correction for gravity and weight of mercury Table 53 

Correction for an average degree of humicHty Table 54 

Correction for the variation of gravity with altitude . . . Table 55 

Determination of heights by the barometer. Metric and dynamic 
measures. 

Values of 18400 loq ' Table 56 

n 

T o r ^ '1 
Values for 18400 log — ^-- Table 57 

Temperature correction factor (a = .0037^) Table 58 

Temperature correction (0.0036719 xZ) ....... Table 59 

Correction for humidity Table 60 

Correction for humidity. Auxiliary to Table 58 ... . Table 61 

Correction for gravity and weight of mercury .... Table 62 

Correction for the variation of gravit}' with altitude . . . Table 63 

Heights reduced from meters to dynamic meters, the acceleration 

of gravity at sea level being 9.80 Table 64 

Corrections to Table 64 for values of the acceleration of gravity 

at sea level different from 9.80 Table 65 

Normal values of the acceleration of gravity at sea level . . . Table 66 

Heights reduced from dynamic meters to geometric meters, the 

acceleration of gravity at sea level being 9.80 . . . Table 67 

Corrections to Table 67 for values of the acceleration of gravity 

at sea level different from 9.80 Table 68 

Difference of height corresponding to a change of o.i inch in the 

barometer. English measures Table 69 

Difference of height corresponding to a change of i millimeter 

in the barometer. Metric measures Table 70 

Determination of heights by the barometer. 

Formula of Babinet Table 71 

Barometric pressures corresponding to the temperature of the 
boiling point of water — 

English measures Table 72 

Metric measures Table 73 



Table 51 
DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 

Values of 60368 [1 +0.0010195X36] log ^^-^^ . 

B 



Barometric 























i Pressure. 
B. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 


Inches. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


12.00 


24814 


24791 


24769 


24746 


24723 


24701 


24678 


24656 


24633 


2461 1 


12. lO 


24588 


24566 


24543 


24521 


24499 


24476 


24454 


24431 


24409 


24387 


I2.20 


24365 


24342 


24320 


24298 


24276 


24253 


24231 


24209 


24187 


24165 


12.30 


24143 


24121 


24098 


24076 


24054 


24032 


24010 


23988 


23966 


23944 


12.40 


23923 


23901 


23879 


23857 


23835 


23813 


23791 


23770 


23748 


23726 


12.50 


23704 


23682 


23661 


23639 


23617 


23596 


23574 


23552 


23531 


23509 


12.60 


23488 


23466 


23445 


23423 


23402 


23380 


23359 


23337 


23316 


23294 


12.70 


23273 


23251 


23230 


23209 


23187 


23166 


23145 


23123 


23102 


23081 


12.80 


23060 


23038 


23017 


22996 


22975 


22954 


22933 


2291 1 


22890 


22869 


12.90 


22S48 


22827 


22806 


22785 


22764 


22743 


22722 


22701 


22680 


22659 


13.00 


22638 


22617 


22596 


22576 


22555 


22534 


22513 


22492 


22471 


22451 


13.10 


22430 


22409 


22388 


22368 


22347 


22326 


22306 


22285 


22264 


22244 


13.20 


22223 


22203 


22182 


22162 


22141 


22121 


22100 


220S0 


22059 


22039 


13-30 


22018 


21998 


21977 


21957 


21937 


2I916 


21896 


21876 


21855 


21835 


13.40 


21815 


21794 


21774 


21754 


21734 


21713 


21693 


21673 


21653 


21633 


13.50 


21612 


21592 


21572 


21552 


21532 


2I512 


21492 


21472 


21452 


21432 


13.60 


21412 


21392 


21372 


21352 


21332 


213I2 


21292 


21272 


21252 


21233 


13.70 


21213 


21193 


21173 


21153 


2 1 134 


2III4 


21094 


21074 


21054 


21035 


13-80 


21015 


20995 


20976 


20956 


20936 


20917 


20897 


20878 


20858 


20838 


13.90 


20819 


20799 


20780 


20760 


20741 


20721 


20702 


20682 


20663 


20643 


14.00 


20624 


20605 


20585 


20566 


20546 


20527 


2050S 


20488 


20469 


20450 


14.10 


20431 


2041 1 


20392 


20373 


20354 


20334 


20315 


20296 


20277 


20258 


14.20 


20238 


20219 


20200 


20181 


20162 


20143 


20124 


20105 


20086 


20067 


14.30 


20048 


20029 


20010 


19991 


19972 


19953 


19934 


19915 


19896 


19877 


14.40 


19858 


19839 


19S21 


19802 


19783 


19764 


19745 


19727 


19708 


19689 


14.50 


19670 


1 965 1 


19633 


I9614 


19595 


19577 


19558 


19539 


19521 


19502 


14.60 


19483 


19465 


19446 


19428 


19409 


19390 


19372 


19353 


19335 


19316 


14.70 


19298 


19279 


19261 


19242 


19224 


19206 


19187 


19169 


19150 


I9132 


14.80 


19114 


19095 


19077 


19059 


19040 


19022 


19004 


18985 


18967 


18949 


14.90 


18931 


18912 


18894 


18876 


18858 


18840 


1 882 1 


18803 


18785 


18767 


15.00 


18749 


18731 


18713 


18694 


18676 


. 18658 


18640 


18622 


18604 


18586 


15-10 


18568 


18550 


18532 


18514 


18496 


18478 


18460 


18442 


18425 


18407 


15-20 


1S389 


18371 


18353 


18335 


18317 


18300 


18282 


18264 


18246 


18228 


15-30 


18211 


18193 


18175 


18157 


1814O 


I8122 


1 8 104 


18086 


18069 


18051 


15.40 


18033 


1 801 6 


17998 


17981 


17963 


17945 


17928 


17910 


17893 


17875 


15.50 


17858 


17S40 


17823 


17805 


17788 


17770 


17753 


17735 


17718 


17700 


15.60 


17683 


17665 


17648 


1 763 1 


I7613 


17596 


17578 


17561 


17544 


17526 


15-70 


17509 


17492 


17474 


17457 


17440 


17423 


17405 


17388 


17371 


17354 


15-80 


17337 


17319 


17302 


17285 


17268 


17251 


17234 


17216 


17199 


17182 


15-90 


17165 


17148 


17131 


17114 


17097 


17080 


17063 


17046 


17029 


17012 


re.oo 


16995 


16978 


1 696 1 


16944 


16927 


169IO 


16893 


16876 


16859 


16842 


16.10 


16S25 


16808 


16792 


16775 


16758 


1 674 1 


16724 


16707 


1 669 1 


16674 


16.20 


16657 


16640 


16623 


16607 


16590 


16573 


16557 


16540 


16523 


16506 


16.30 


16490 


16473 


16456 


16440 


16423 


16406 


16390 


16373 


16357 


16340 


16.40 


16324 


16307 


16290 


16274 


16257 


1 624 1 


16224 


16208 


16191 


16175 


16.50 


16158 


16142 


16125 


16109 


16092 


16076 


16060 


16043 


16027 


16010 


16.60 


15994 


15978 


15961 


15945 


15929 


15912 


15896 


15S80 


15863 


15847 


16.70 


1 583 1 


15815 


15798 


15782 


15766 


15750 


15733 


15717 


15701 


15685 


16.80 


15669 


15652 


15636 


15620 


15604 


15588 


15572 


15556 


15539 


15523 


16.90 


15507 


1 549 1 


15475 


15459 


15443 


15427 


15411 


15395 


15379 


15363 


17.00 


15347 


15331 


15315 


15299 


15283 


15267 


15251 


15235 


15219 


15203 



Smithsonian Table*. 



133 



Table 51 . 

DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 

29.90 



Values of 60368 [1+0.0010195X36] log 



B 



Barometric 






















P-essure 
B. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 


Inches. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


17.00 


15347 


1533I 


I5315 


15299 


15283 


15267 


15251 


15235 


15219 


15203 


17.10 


I5187 


15172 


15156 


I5140 


15124 


15 108 


15092 


15076 


15061 


15045 


17.20 


15029 


15013 


14997 


14982 


14966 


14950 


14934 


14919 


14903 


14887 


17.30 


1487I 


14856 


14840 


14824 


14809 


14793 


14777 


14762 


14746 


14730 


17.40 


14715 


14699 


14684 


14668 


14652 


14637 


1 462 1 


14606 


14590 


14575 


17.50 


14559 


14544 


14528 


145 1 2 


14497 


1448 1 


14466 


14 45 1 


14435 


14420 


17.60 


14404 


14389 


14373 


14358 


14342 


14327 


14312 


14296 


14281 


14266 


17.70 


14250 


14235 


14219 


14204 


14 1 89 


14173 


14158 


14143 


14128 


I4II2 


17.80 


14097 


14082 


14067 


1405 1 


14036 


1402 1 


14006 


13990 


13975 


13960 


17.90 


13945 


13930 


13914 


13899 


13884 


13869 


13854 


13839 


13824 


13808 


18.00 


13793 


13778 


13763 


13748 


13733 


I3718 


13703 


13688 


13673 


13658 


18.10 


13643 


13628 


I3613 


13598 


13583 


13568 


13553 


13538 


13523 


13508 


18.20 


13493 


T3478 


13463 


13448 


13433 


13418 


13404 


13389 


13374 


13359 


18.30 


13314 


13329 


13314 


13300 


13285 


13270 


13255 


13240 


13226 


13211 


18.40 


13196 


13181 


I3166 


I3152 


13137 


13122 


13107 


13093 


13078 


13063 


18.50 


13049 


13034 


13019 


13005 


12990 


12975 


1 2961 


12946 


1 293 1 


12917 


18.60 


12902 


12888 


12873 


12858 


12844 


12829 


12815 


12800 


12785 


I2771 


18.70 


12756 


12742 


12727 


I2713 


12698 


12684 


12669 


12655 


12640 


12626 


18.80 


T2611 


12597 


125S3 


12568 


12554 


12539 


12525 


12510 


12496 


12482 


18.90 


12467 


12453 


12438 


12424 


12410 


12395 


12381 


12367 


12352 


12338 


19.00 


12324 


12310 


12295 


12281 


12267 


12252 


12238 


12224 


12210 


12195 


19.10 


I2181 


12167 


12153 


12138 


12124 


I2IIO 


12096 


12082 


12068 


12053 


19.20 


12039 


12025 


1 201 1 


1 1997 


1 1983 


1 1969 


1 1954 


1 1940 


1 1926 


II912 


19.30 


1 1898 


1 1 884 


I1S70 


1 1856 


1 1842 


1 1828 


I1814 


1 1800 


1 1 786 


II772 


19.40 


1 1758 


1 1 744 


1 1730 


II716 


1 1 702 


1 1 688 


1 1674 


1 1660 


1 1646 


1 1632 


J 9.50 


I1618 


1 1 604 


1 1590 


II576 


1 1562 


1 1548 


1 1534 


11520 


1 1507 


11493 


19.60 


1 1479 


1 1465 


I1451 


1 1437 


1 1423 


11410 


1 1396 


1 1382 


1 1368 


1 1354 


19.70 


1 1 340 


11327 


II313 


1 1 299 


1 1 285 


11272 


1 1 258 


1 1 244 


1 1 230 


II217 


19.80 


1 1 203 


1 1 189 


1 1 175 


1 1 162 


1 1 148 


1 1 134 


III2I 


1 1 107 


1 1093 


1 1080 


19.90 


1 1066 


1 1052 


11039 


1 1025 


IIOII 


10998 


10984 


10970 


10957 


10943 


20.00 


10930 


IO916 


10903 


10889 


10875 


10862 


10848 


10835 


1082 1 


10808 


20.10 


10794 


1 078 1 


10767 


10754 


10740 


10727 


107 13 


10700 


10686 


10673 


20.20 


10659 


10646 


10632 


10619 


10605 


10592 


10579 


10565 


10552 


10538 


20.30 


10525 


10512 


10498 


10485 


10472 


10458 


10445 


1043 1 


10418 


10405 


20.40 


1039 1 


IO37S 


10365 


10352 


10338 


10325 


103 1 2 


10298 


10285 


10272 


20.50 


10259 


10245 


10232 


IO219 


10206 


10192 


IOI79 


10166 


10153 


IOI39 


20.60 


IOI26 


IOII3 


lOIOO 


10087 


10074 


10060 


10047 


10034 


1002 1 


10008 


20.70 


9995 


9982 


9968 


9955 


9942 


9929 


9916 


9903 


9890 


9877 


20.80 


9864 


9851 


9838 


9825 


9812 


9799 


9786 


9772 


9759 


9746 


20.90 


9733 


9720 


9707 


9694 


9681 


9668 


9655 


9642 


9629 


9617 


21.00 


9604 


9591 


957S 


9565 


9552 


9539 


9526 


9513 


9500 


9487 


21.10 


9474 


9462 


9449 


9436 


9423 


9410 


9397 


9384 


9372 


9359 


21.20 


9346 


9333 


9320 


9307 


9295 


9282 


9269 


9256 


9244 


9231 


21.30 


9218 


9205 


9193 


9180 


9167 


9154 


9142 


9129 


9116 


9103 


21.40 


9091 


9078 


9065 


9053 


9040 


9027 


9015 


9002 


8989 


8977 


21.50 


8964 


8951 


8939 


8926 


8913 


8901 


8888 


8876 


8863 


8850 


21.60 


8838 


8825 


8813 


8800 


8788 


8775 


8762 


8750 


8737 


8725 


21.70 


8712 


8700 


8687 


8675 


866? 


8650 


8637 


8625 


8612 


8600 


21.80 


8587 


8575 


8562 


8550 


8538 


8525 


8513 


8500 


8488 


8475 


2X.90 


8463 


8451 


8438 


8426 


8413 


8401 


8389 


8376 


8364 


8352 


22.00 


8339 


8327 


8314 


8302 


8290 


8277 


8265 


8253 


8240 


8228 



Smithsonian Tables. 



134 



Table 51 
DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 

29.90 



Values of 60368 [1 +0.0010195X36] log 



B 



Barometric 






















Pressure. 
B. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 


Inches. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


22.00 


8339 


8327 


8314 


8302 


8290 


8277 


8265 


8253 


8240 


8228 


22. lO 


8216 


8204 


8191 


8179 


8167 


8154 


8142 


8130 


8118 


8105 


22. 20 


8093 


S081 


8069 


8056 


8044 


8032 


8020 


8008 


7995 


7983 


22.30 


7971 


7959 


7947 


7935 


7922 


7910 


7898 


7886 


7874 


7862 


22.40 


7849 


7837 


7825 


7S13 


7801 


7789 


7777 


7765 


7753 


7740 


22.50 


7728 


7716 


7704 


7692 


7680 


7668 


7656 


7644 


7632 


7620 


22.60 


7608 


7596 


7584 


7572 


7560 


7548 


7536 


7524 


7512 


7500 


22.70 


7488 


7476 


7464 


7452 


7440 


7428 


7416 


7404 


7392 


7380 


22.80 


7368 


7356 


7345 


7333 


7321 


7309 


7297 


7285 


7273 


7261 


22.90 


7249 


7238 


7226 


7214 


7202 


7190 


7178 


7166 


7155 


7143 


23.00 


713I 


7119 


7107 


7096 


7084 


7072 


7060 


7048 


7037 


7025 


23.10 


7013 


7001 


6990 


6978 


6966 


6954 


6943 


6931 


6919 


6907 


23.20 


6896 


6884 


6872 


6861 


6849 


6837 


6825 


6814 


6802 


6790 


23-30 


6779 


6767 


6755 


6744 


6732 


6721 


6709 


6697 


6686 


6674 


23.40 


6662 


6651 


6639 


6628 


6616 


6604 


6593 


6581 


6570 


6558 


23.50 


6546 


6535 


6523 


6512 


6500 


6489 


6477 


6466 


6454 


6443 


23.60 


6431 


6420 


6408 


6397 


6385 


6374 


6362 


6351 


6339 


6328 


23.70 


6316 


6305 


6293 


6282 


6270 


6259 


6247 


6236 


6225 


6213 


23.80 


6202 


6190 


6179 


6167 


6156 


6145 


6133 


6122 


61 10 


6099 


23.90 


6088 


6076 


6065 


6054 


6042 


6031 


6020 


6008 


5997 


5986 


24.00 


5974 


5963 


5952 


5940 


5929 


5918 


5906 


5895 


5884 


5872 


24.10 


5861 


5850 


5839 


5827 


5816 


5805 


5794 


5782 


5771 


5760 


24.20 


5749 


5737 


5726 


5715 


5704 


5693 


5681 


5670 


5659 


5648 


24.30 


5637 


5625 


5614 


5603 


5592 


5581 


5570 


5558 


5547 


5536 


24.40 


5525 


5514 


5503 


5492 


5480 


5469 


5458 


5447 


5436 


5425 


24.50 


5414 


5403 


5392 


5381 


5369 


5358 


5347 


5336 


5325 


5314 


24.60 


5303 


5292 


5281 


5270 


5259 


5248 


5237 


5226 


5215 


5204 


24.70 


5193 


5182 


5171 


5160 


5149 


5138 


5127 


5116 


5105 


5094 


24.80 


5083 


5072 


5061 


5050 


5039 


5028 


5017 


5006 


4995 


4985 


24.90 


4974 


4963 


4952 


4941 


4930 


4919 


4908 


4897 


4886 


4876 


25.00 


4865 


4854 


4843 


4832 


4821 


4810 


4800 


4789 


4778 


4767 


25.10 


4756 


4745 


4735 


4724 


4713 


4702 


4691 


4681 


4670 


4659 


25.20 


4648 


4637 


4627 


4616 


4605 


4594 


4584 


4573 


4562 


4551 


25-30 


4540 


4530 


4519 


4508 


4498 


4487 


4476 


4465 


4455 


4444 


25.40 


4433 


4423 


4412 


4401 


4391 


4380 


4369 


4358 


4348 


4337 


25.50 


4326 


4316 


4305 


4295 


4284 


4273 


4263 


4252 


4241 


4231 


25.60 


4220 


4209 


4199 


4188 


4178 


4167 


4156 


4146 


4135 


4125 


25.70 


41 14 


4104 


4093 


4082 


4072 


4061 


4051 


4040 


4030 


4019 


25.80 


4009 


3998 


3988 


3977 


3966 


3956 


3945 


3935 


3924 


3914 


25.90 


3903 


3893 


3882 


3872 


3861 


3851 


3841 


3830 


3820 


3809 


26.00 


3799 


3788 


3778 


3767 


3757 


3746 


3736 


3726 


3715 


3705 


26.10 


3694 


3684 


3674 


3663 


3653 


3642 


3632 


3622 


361 1 


3601 


26.20 


3590 


3580 


3570 


3559 


3549 


3539 


3528 


3518 


3508 


3497 


26.30 


3487 


3477 


3466 


3456 


3446 


3435 


3425 


3415 


3404 


3394 


26.40 


3384 


3373 


3363 


3353 


3343 


3332 


3322 


3312 


3301 


3291 


26.50 


3281 


3270 


3260 


3250 


3240 


3230 


3219 


3209 


3199 


3189 



Smithsonian Tables. 



135 



Table 51 . 

DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 
Values of 60368 [1 + 0.0010195 X 36] log 29^^0. 



Barometric 







" 
















Pressure. 
B. 


.00 


.01 


.02 


.03 


.04 


.05 


.06 


.07 


.08 


.09 


Inches. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


26.50 


3281 


3270 


3260 


3250 


3240 


3230 


3219 


3209 


3199 


3189 


26.60 


3179 


3168 


3158 


3148 


3138 


3128 


3I17 


3107 


3097 


3087 


26.70 


3077 


3066 


3056 


3046 


3036 


3026 


3016 


3005 


2995 


2985 


26.80 


2975 


2965 


2955 


2945 


2934 


2924 


2914 


2904 


2894 


2884 


26.90 


2874 


2864 


2854 


2843 


2833 


2S23 


2813 


2803 


2793 


2783 


27.00 


2773 


2763 


2753 


2743 


2733 


2723 


2713 


2703 


2692 


2682 


27.10 


2672 


2662 


2652 


2642 


2632 


2622 


2612 


2602 


2592 


2582 


27.20 


2572 


2562 


2552 


2542 


2532 


2522 


2512 


2502 


2493 


2483 


27.30 


2473 


2463 


2453 


2443 


2433 


2423 


2413 


2403 


2393 


2383 


27.40 


2373 


2363 


2353 


2343 


2334 


2324 


2314 


2304 


2294 


2284 


27.50 


2274 


2264 


2254 


2245 


2235 


2225 


2215 


2205 


2195 


2185 


27.60 


2176 


2166 


2156 


2146 


2136 


2126 


2Tl6 


2107 


2097 


-r.87 


27.70 


2077 


2067 


2058 


2048 


2038 


2028 


2018 


2009 


1999 


1989 


27.80 


1979 


1970 


i960 


1950 


1940 


1930 


I92I 


I9II 


iqoi 


189I 


27.90 


1882 


1872 


1862 


1852 


1843 


1833 


1823 


1814 


1804 


1794 


28.00 


1784 


1775 


1765 


1755 


1746 


1736 


1726 


1717 


1707 


1697 


28.10 


1688 


1678 


1668 


1659 


1649 


1639 


1630 


1620 


1610 


160I 


28.20 


1591 


1581 


1572 


1562 


1552 


1543 


1533 


1524 


I514 


1504 


28.30 


1495 


1485 


1476 


1466 


1456 


1447 


1437 


1428 


I418 


1408 


28.40 


1399 


1389 


1380 


1370 


1361 


I351 


1342 


1332 


1322 


I313 


28.50 


1303 


1294 


1284 


1275 


1265 


1256 


1246 


1237 


1227 


1218 


28.60 


1208 


1 199 


1 189 


1 180 


I170 


I161 


II5I 


1 142 


II32 


1 123 


28.70 


III3 


1 104 


1094 


1085 


1075 


1066 


1057 


1047 


1038 


1028 


28.80 


1019 


1009 


TOGO 


990 


981 


972 


962 


953 


943 


934 


28.90 


925 


915 


906 


896 


887 


878 


868 


859 


849 


840 


29.00 


831 


821 


812 


803 


793 


784 


775 


765 


756 


746 


29.10 


737 


728 


71S 


709 


700 


690 


681 


672 


663 


653 


29.20 


644 


635 


625 


616 


607 


597 


588 


579 


570 


560 


29.30 


551 


542 


532 


523 


514 


505 


495 


486 


477 


468 


29.40 


458 


449 


440 


431 


421 


412 


403 


394 


384 


375 


29.50 


366 


357 


348 


338 


329 


^20 


3" 


302 


292 


283 


29.60 


274 


265 


256 


247 


237 


228 


219 


210 


201 


192 


29.70 


182 


173 


164 


155 


146 


137 


128 


118 


109 


100 


29.80 


+ 91 


+ 82 


+ 73 


+ 64 


+ 55 


+ 45 


+ 36 


+ 27 


+ 18 


+ 9 


29.90 





- 9 


— 18 


- 27 


- 36 


- 45 


- 55 


- 64 


- 73 


- 82 


30.00 


- 91 


— 100 


— 109 


-118 


-127 


-136 


-145 


-154 


-163 


— 172 


30.10 


-181 


— 190 


-199 


-208 


-217 


— 226 


-235 


-244 


-253 


— 262 


30.20 


-271 


-280 


-289 


-298 


-307 


-316 


-325 


-334 


-343 


-352 


30.30 


-361 


-370 


-379 


-388 


- 397 


— 406 


-415 


-424 


-433 


-442 


30.40 


-451 


— 460 


-469 


-47S 


-486 


-495 


-504 


-513 


-522 


-531 


30.50 


-540 


-549 


-558 


-567 


-576 


-585 


-593 


— 602 


-611 


— 620 


30.60 


— 629 


-638 


-647 


-656 


-665 


-673 


-682 


— 691 


— 700 


-709 


30.70 


-718 


-727 


-735 


-744 


-753 


— 762 


-771 


-780 


-788 


-797 


30.80 


~8o6 


-815 


— 824 


-833 


-841 


-850 


-859 


-868 


-877 


-885 



Smithsonian Tables. 



136 



Table 52. 
DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 
Term for Temperature: 0.002039 (^ — 50°) z. 

For temperatures {»^°- =»: ^; } ,he values ,re ,o be { '^^.^.f^-^,^. 



Mean 


APPROXIMATE DIFFERENCE OF HEIGHT OBTAINED FROM TABLE 61. 1 


Temperature. 

e. 


























1 


20 


40 


60 


80 


100 


200 


300 


400 


500 


600 


700 


800 


900 


F. 


F. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


49° 


51° 


O 


O 


O 


O 


O 


O 


I 


I 


I 


I 


I 


2 


2 


48 


52 


O 


O 


O 


O 


O 


I 


I 


2 


2 


2 


3 


3 


4 


47 


53 


O 


O 


O 


O 




I 


2 


2 


3 


4 


4 


5 


6 


46 


54 


O 


O 


O 


I 




2 


2 


3 


4 


5 


6 


7 


7 


45 


55 


O 


O 








2 


3 


4 


5 


6 


7 


8 


9 


44 


56 


O 


O 








2 


4 


5 


6 


7 


9 


10 


II 


43 


57 


O 










3 


4 


6 


7 


9 


ID 


II 


13 


42 


58 


o 








2 


3 


5 


7 


8 


ID 


II 


13 


15 


41 


59 


o 








2 


4 


6 


7 


9 


II 


13 


15 


17 


40 


60 


o 






2 


2 


4 


6 


8 


10 


12 


14 


16 


18 


39 


61 


O 






2 


2 


4 


7 


9 


II 


13 


16 


18 


20 


38 


62 


O 






2 


2 


5 


7 


10 


12 


15 


17 


20 


22 


37 


63 






2 


2 


3 


5 


8 


II 


13 


16 


19 


21 


24 


36 


64 






2 


2 


3 


6 


9 


II 


14 


17 


20 


23 


26 


35 


65 






2 


2 


3 


6 


9 


12 


15 


18 


21 


24 


28 


34 


66 






2 


3 


3 


7 


ID 


13 


16 


20 


23 


26 


29 


33 


67 






2 


3 


3 


7 


ID 


14 


17 


21 


24 


28 


31 


32 


68 






2 


3 


4 


7 


11 


15 


18 


22 


26 


29 


33 


31 


69 




2 


2 


3 


4 


8 


12 


15 


19 


23 


27 


31 


35 


30 


70 




2 


2 


3 


4 


8 


12 


16 


20 


24 


29 


33 


37 


29 


71 




2 


3 


3 


4 


9 


13 


17 


21 


26 


30 


34 


39 


28 


72 




2 


3 


4 


4 


9 


13 


18 


22 


27 


31 


36 


40 


27 


73 




2 


3 


4 


5 


9 


14 


19 


23 


28 


33 


38 


42 


26 


74 




2 


3 


4 


5 


lO 


15 


20 


24 


29 


34 


39 


44 


25 


75 




2 


3 


4 


5 


lO 


15 


20 


25 


31 


36 


41 


46 


24 


76 




2 


3 


4 


5 


II 


i6 


21 


27 


32 


37 


42 


48 


23 


77 




2 


3 


4 


6 


II 


17 


22 


28 


33 


39 


44 


50 


22 


78 




2 


3 


5 


6 


II 


17 


23 


29 


34 


40 


46 


51 


21 


79 




2 


4 


5 


6 


12 


i8 


24 


30 


35 


41 


47 


53 


20 


80 




2 


4 


5 


6 


12 


i8 


24 


31 


37 


43 


49 


55 


19 


Si 




3 


4 


5 


6 


13 


19 


25 


32 


38 


44 


51 


57 


18 


82 




3 


4 


5 


7 


13 


20 


26 


33 


39 


46 


52 


59 


17 


83 




3 


4 


5 


7 


13 


20 


27 


34 


40 


47 


54 


61 


16 


84 




3 


4 


6 


7 


14 


21 


28 


35 


42 


49 


55 


62 


15 


85 




3 


4 


6 


7 


14 


21 


29 


36 


43 


50 


57 


64 


14 


86 




3 


4 


6 


7 


15 


22 


29 


37 


44 


51 


59 


66 


13 


87 


2 


3 


5 


6 


8 


15 


23 


30 


38 


45 


53 


60 


68 


12 


88 


2 


3 


5 


6 


8 


15 


23 


31 


39 


46 


54 


62 


70 


II 


89 


2 


3 


5 


6 


8 


i6 


24 


32 


40 


48 


56 


64 


72 


10 


90 


2 


3 


5 


7 


8 


i6 


24 


io 


41 


49 


57 


65 


73 


9 


9^ 


2 


3 


5 


7 


8 


17 


25 


33 


42 


50 


59 


67 


75 


8 


92 


2 


3 


5 


7 


9 


17 


26 


34 


43 


51 


60 


69 


77 


7 


93 


2 


4 


5 


7 


9 


i8 


26 


35 


44 


53 


61 


70 


79 


6 


94 


2 


4 


5 


7 


9 


i8 


27 


36 


45 


54 


63 


72 


81 


5 


95 


2 


4 


6 


7 


9 


i8 


28 


37 


46 


55 


64 


73 


83 


4 


96 


2 


4 


6 


8 


9 


19 


28 


38 


47 


56 


66 


75 


84 


3 


97 


2 


4 


6 


8 


lO 


19 


29 


38 


48 


57 


67 


77 


86 


2 


98 


p 


4 


6 


8 


lO 


20 


29 


39 


49 


59 


69 


78 


88 


I 


99 


2 


4 


6 


8 


lO 


20 


30 


40 


50 


60 


70 


80 


90 





100 


1 


4 


6 


8 


ID 


20 


31 


41 


51 


61 


71 


82 


92 

1 



Smithsonian TABLts. 



U7 



Table 52. 

DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 
Term for Temperature : 0.002039 (^ — 50°) z. 

f added, 
subtracted. 



For temperatures < u-f T^ f^o p' [ the values are to be | ' 



Mean 


APPROXIMATE DIFFERENCE OF 


HEIGHT OBTAINED 


FROM 


TABLE 61 . 


Temperature. 
























1000 


2000 


3000 


4000 


5000 


6000 


7000 


8000 


9000 


10000 20000 


F. 


F. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


49° 


51° 


2 


4 


6 


8 


10 


12 


14 


16 


18 


20 


41 


48 


52 


4 


8 


12 


16 


20 


24 


29 


33 


37 


41 


82 


47 


53 


6 


12 


18 


24 


31 


37 


43 


49 


55 


61 


122 


46 


54 


8 


16 


24 


33 


41 


49 


57 


65 


73 


82 


163 


45 


55 


10 


20 


31 


41 


51 


61 


71 


82 


92 


102 


204 


44 


56 


12 


24 


37 


49 


61 


73 


86 


98 


no 


122 


245 


43 


57 


14 


29 


43 


57 


71 


86 


100 


114 


128 


143 


285 


42 


58 


16 


33 


49 


65 


82 


98 


114 


130 


147 


163 


326 


41 


59 


18 


37 


55 


73 


92 


no 


128 


147 


165 


184 


367 


40 


60 


20 


41 


61 


82 


102 


122 


143 


163 


1S4 


204 


408 


39 


61 


22 


45 


67 


90 


112 


135 


157 


179 


202 


224 


449 


38 


62 


24 


49 


73 


98 


122 


147 


171 


196 


220 


245 


489 


37 


63 


27 


53 


80 


106 


133 


159 


186 


212 


239 


265 


530 


36 


64 


29 


57 


86 


114 


143 


171 


200 


22S 


257 


2S5 


571 


35 


65 


31 


61 


92 


122 


153 


184 


214 


245 


275 


306 


612 


34 


66 


33 


65 


98 


130 


163 


196 


228 


261 


294 


326 


652 


33 


67 


35 


69 


104 


139 


173 


208 


243 


277 


312 


347 


693 


32 


68 


37 


73 


no 


147 


184 


220 


257 


294 


330 


367 


734 


31 


69 


39 


77 


116 


155 


194 


232 


271 


310 


349 


387 


775 


30 


70 


41 


82 


122 


163 


204 


245 


285 


326 


367 


408 


816 


29 


71 


43 


86 


128 


171 


214 


257 


300 


343 


385 


428 


856 


28 


72 


45 


90 


135 


179 


224 


269 


314 


359 


404 


449 


897 


27 


73 


47 


94 


141 


188 


234 


281 


328 


375 


422 


469 


938 


26 


74 


49 


98 


147 


196 


245 


294 


343 


391 


440 


489 


979 


25 


75 


51 


102 


153 


204 


255 


306 


357 


408 


459 


510 


1020 


24 


76 


53 


106 


159 


212 


265 


318 


371 


424 


477 


530 


1060 


23 


77 


55 


no 


165 


220 


275 


330 


385 


440 


495 


551 


IIOI 


22 


78 


57 


114 


171 


228 


285 


343 


400 


457 


514 


571 


1 142 


21 


79 


59 


118 


177 


236 


296 


355 


414 


473 


532 


591 


1183 


20 


80 


61 


122 


184 


245 


306 


367 


428 


489 


551 


612 


1223 


19 


81 


63 


126 


190 


253 


316 


379 


442 


506 


569 


632 


1264 


18 


82 


65 


130 


196 


261 


326 


391 


457 


522 


5S7 


652 


1305 


17 


83 


67 


135 


202 


269 


336 


404 


471 


538 


606 


673 


1346 


16 


84 


69 


139 


208 


277 


347 


416 


485 


555 


624 


693 


1387 


15 


85 


71 


143 


214 


285 


357 


428 


500 


571 


642 


714 


1427 


14 


86 


73 


147 


220 


294 


367 


440 


514 


587 


661 


734 


1468 1 


13 


87 


75 


151 


226 


302 


377 


453 


528 


604 


679 


754 


1509 ■ 


12 


88 


77 


155 


232 


310 


387 


465 


542 


620 


697 


775 


1550 


II 


89 


80 


159 


239 


318 


398 


477 


557 


636 


716 


795 


1590 


10 


90 


82 


163 


245 


326 


40S 


489 


571 


652 


734 


816 


1631 


9 


91 


84 


167 


251 


334 


418 


502 


585 


669 


752 


836 


1672 


8 


92 


86 


171 


257 


343 


42S 


514 


599 


685 


771 


856 


1713 


7 


93 


88 


175 


263 


351 


438 


526 


614 


701 


789 


877 


1754 


6 


94 


90 


179 


269 


359 


449 


538 


628 


718 


807 


897 


1794 


5 


95 


92 


184 


275 


367 


459 


551 


642 


734 


826 


918 


1835 


4 


96 


94 


188 


2S1 


375 


469 


563 


657 


750 


844 


938 


1876 


3 


97 


96 


192 


287 


383 


479 


575 


671 


767 


862 


958 


1917 


2 


98 


9S 


196 


294 


391 


489 


5S7 


685 


783 


881 


979 


1957 


I 


99 


100 


200 


300 


400 


500 


599 


699 


799 


899 


999 


1998 





100 


102 


204 


306 


40S 


510 


612 


714 


816 


918 


1020 


2039 



SwiTHSONiAN Tables. 



138 



Table 53. 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 
Correction for Gravity and Weight of Mercury : z (0.002640 cos 2 4> - 0.000007 «.= 2 4. + 0.00244). 



Latitude. 


APPROXIMATE DIFFERENCE OF HEIGHT OBTAINED FROM TABLES 


51-52. 


500 


1000 


1500 


2000 


2500 3000 


3500 


4000 


4500 


5000 


5500 




Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 1 Feet. 


Feet. ' Feet. 


Feet. 


Feet. 


0° 


+3 


+ 5 


+8 
8 


+ IC 


I + 13 


+ 15 


+ 18 


+ 20 


+ 23 


+ 25 


+ 28 


2 


3 


5 


10 


13 


15 


18 


20 


23 


2S 


28 


4 
6 

8 


3 


5 


8 
8 
7 


10 


13 


15 


18 


20 


23 


2S 


28 


3 


5 
5 


10 
10 


13 

12 


15 
IS 


18 
17 


20 
20 


23 
22 


2S 
25 


28 
27 


10 


+ 2 


+5 


+ 7 


+ 10 


+ 12 


+ IS 


+ 17 


+ 20 


+ 22 


+ 2S 


+ 27 


12 


2 


5 


7 


10 


12 


15 


17 


19 


22 


24 


27 


14 
16 
18 


2 


5 


7 


10 


12 


14 


17 


19 


21 


24 


26 


- 


5 


7 


9 


12 


14 


16 


19 


21 


23 


26 


2 


5 


7 


9 


11 


14 


16 


18 


21 


23 


2S 


20 

22 


+ 2 
2 


+4 
4 


+ 7 
6 


+ 9 
9 


+ 11 
11 


+13 
13 


+ 16 
IS 


+ 18 
17 


+ 20 
19 


+ 22 
22 


+ 24 
24 


24 
26 


2 

2 


4 
4 


6 
6 


8 
8 


10 
10 


13 

12 


15 
14 


17 
16 


19 

18 


21 
20 


23 
22 


28 


2 


4 


6 


8 


10 


12 


14 


16 


18 


20 


21 


30 


+ 2 


+4 


+6 


+ 8 


+ 9 


+ 11 


+ 13 


+ 15 


+ 17 


+ 19 


+ 21 


32 


2 


4 


5 


7 


9 


II 


13 


14 


16 


18 


20 


34 


2 


3 


5 


7 


9 


10 


12 


14 


IS 


17 


19 

18 


36 


2 


3 


5 


6 


8 


10 


II 


13 


IS 


16 


38 


2 


3 


5 


6 


8 


9 


II 


12 


14 


IS 


17 


40 


+ 1 


+3 


+4 


+ 6 


+ 7 


+ 9 


+ 10 


+ 12 


+13 


+14 


+ 16 


42 




3 


4 


5 


7 


8 


9 


II 


12 


13 


15 


44 




3 


4 


5 


6 


8 


9 


10 


II 


13 


14 


45 


+ 1 


+ 2 


+4 


+ 5 


+ 6 


+ 7 


+ 9 


+ 10 


+11 


+ 12 


+ 13 


46 


+ 1 


+ 2 


+4 


+ 5 


+ 6 


+ 7 


+ 8 


+ 9 


+11 - 


+ 12 


+ 13 


48 




2 


3 


4 


5 


6 


8 


9 


10 


II 


12 


SO 




2 


3 


4 


5 


6 


7 


8 


9 


10 


II 


52 


+ 1 


+ 2 i 


+3 


+ 4 


+ 4 


+ S 


+ 6 


+ 7 


+ 8 


+ 9 


+ 10 


54 




2 


2 


3 


4 


5 


6 


6 


7 


8 


9 


56 






2 


3 


4 


4 


5 


6 


7 


7 


8 


58 






2 


3 


3 


4 


4 


5 


6 


6 


7 


60 






2 


2 


3 


3 


4 


4 


S 


6 


6 


62 





+ 1 


+ 1 


+ 2 


+ 2 


+ 3 


■f 3 


■f 4 


+ 4 1 


+ S 


+ S 


64 









2 


2 


2 


3 


4 


3 


4 i 


4 


66 









I 


2 


2 


2 


3 


3 


3 


3 


68 









I 


I 


2 


2 


2 


2 


3 


3 


70 










I 


I 


I 


I 


2 


2 


' 


2 


72 














f I - 


f I - 


f I - 


f I - 


f I 


1 
+ I 


+ I 


74 

















I 


I 


I 


I 


I 


I 


76 



































78 



































80 



































1 




1 










1 






Smithsonian ' 


Fables. 










15 










135 















Table 53. 

DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 

Correction for Gravity and Weight of Mercury : z (0.002640 cos 2 4> — 0.000007 cos- 3 <^ + 0.00244). 



Latitude. 



APPROXIMATE DIFFERENCE OF 


HEIGHT OBTAINED FROM TABLES 51 


-52. 


6000 


7000 


8000 


9000 


10000 


11000 


12000 


13000 


14000 


15000 


20000 




Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


0° 


+30 


+35 


+41 


+46 


+ 51 


+ 56 


+61 


+66 


+ 71 


+ 76 


+ 10X 


2 


30 


35 


40 


46 


51 


56 


61 


66 


71 


76 


lOI 


4 


30 


35 


40 


45 


50 


55 


61 


66 


71 


76 


101 


6 


30 


35 


40 


45 


50 


55 


61 


66 


71 


76 


100 


8 


30 


35 


40 


45 


50 


55 


60 


65 


70 


75 


99 


10 


+ 29 


+34 


+39 


+44 


+49 


+ 54 


+ 59 


+64 


+69 


+ 74 


+ 98 


12 


29 


34 


39 


44 


48 


53 


58 


63 


68 


73 


97 


14 


29 


33 


38 


43 


48 


52 


57 


62 


67 


71 


95 


16 


28 


33 


37 


42 


47 


51 


56 


61 


65 


70 


93 


18 


27 


32 


37 


41 


46 


50 


55 


59 


64 


68 


91 


20 


+ 27 


+31 


+ 36 


+40 


+45 


+49 


+53 


+ 58 


+62 


+67 


+ 89 


22 


26 


30 


35 


39 


43 


48 


52 


56 


61 


65 


87 


24 


25 


29 


34 


38 


42 


46 


50 


55 


59 


63 


84 


26 


24 


28 


32 


37 


41 


45 


49 


53 


57 


61 


81 


28 


23 


27 


31 


35 


39 


43 


47 


SI 


55 


59 


78 


30 


+23 


+ 26 


+ 30 


+34 


+38 


+41 


+45 


+49 


+ 53 


+ 56 


+ 75 


3^ 


22 


25 


29 


32 


36 


40 


43 


47 


50 


54 


72 


34 


21 


24 


27 


31 


34 


38 


41 


44 


48 


51 


68 


36 


20 


23 


26 


2Q 


32 


36 


39 


42 


46 


49 


65 


38 


18 


22 


25 


28 


31 


34 


37 


40 


43 


46 


61 


40 


+ 17 


+ 20 


+ 23 


+ 26 


+ 29 


+32 


+35 


+38 


+41 


+43 


+ 57 


4^ 


16 


19 


22 


24 


27 


30 


33 


35 


38 


41 


54 


44 


15 


18 


20 


23 


25 


28 


30 


33 


35 


38 


50 


45 


+ 15 


+ 17 


+ 19 


+ 22 


+ 24 


+ 27 


+ 29 


+32 


+34 


+37 


+ 49 


46 


+ 14 


+ 16 


+ 19 


+ 21 


+ 23 


+ 26 


+ 28 


+30 


+33 


+35 


+ 46 


48 


13 


15 


17 


19 


22 


24 


26 


28 


30 


32 


43 


50 


12 


14 


16 


18 


20 


22 


24 


26 


28 


30 


40 


52 


+ 11 


+ 13 


+ 14 


+ 16 


+ 18 


+ 20 


+ 22 


+ 23 


+ 25 


+ 27 


+ 36 


54 


10 


II 


13 


15 


16 


18 


19 


21 


23 


24 


32 


56 


Q 


10 


12 


13 


14 


16 


17 


19 


20 


22 


29 


58 


8 





10 


II 


13 


14 


15 


17 


18 


19 


26 


bo 


7 


8 


9 


10 


II 


12 


13 


14 


16 


17 


22 


62 


+ 6 


+ 7 


+ 8 


+ 9 


+ 10 


+ 11 


+ 11 


+ 12 


+ 13 


+ 14 


+ 19 


64 


5 


6 


6 


7 


8 


9 


10 


10 


II 


12 


16 


66 


4 


5 


5 


6 


7 


7 


8 


9 


9 


10 


13 


68 


3 


4 


4 


5 


5 


6 


6 


7 


7 


8 


II 


70 


2 


3 


3 


4 


4 


4 


5 


5 


6 


6 


8 


72 


+ 2 


+ 2 


+ 2 


+ 3 


+ 3 














74 


+ I 


+ I 


+ 2 


+ 2 


+ 2 














76 


+ I 


+ I 


+ I 


+ I 


+ I 














78 








1 




















80 





i ° 








— I 
















Smithsonian Tables. 



140 



Table 54. 
DETERMINATION OF HEIGHTS BY THE BAROMETER, 
ENGLISH MEASURES. 
Correction for an Average Degree of Humidity. 



Mean 


APPROXIMATE DIFFERENCE OF HEIGHT OBTAINED FROM TABLES 51- 


52 


Temper- 
aturo. 


























500 


1000 


2000 


3000 


4000 


5000 


6000 


7000 


8000 


9000 


10000 


20000 


F. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


-20° 


O 


O 


O 


O 











+ 1 


+ 1 


+ 1 


+ 1 


+ 2 


-i6 


O 


O 


O 


+ 1 


+ 1 


+ 1 


+ 1 


I 


2 


2 


2 


4 


— 12 


O 


O 


+ 1 


I 


I 


2 


2 


2 


3 


3 


3 


6 


- 8 


O 


O 




I 


2 


2 


3 


3 


4 


4 


4 


9 


- 6 


O 


O 




I 


2 


2 


3 


3 


4 


4 


5 


10 


- 4 


O 


+ r 




2 


2 


3 


3 


4 


4 


5 


6 


II 


— 2 


O 






2 


2 


3 


4 


4 


5 


6 


6 


12 





O 






2 


3 


3 


4 


5 


5 


6 


7 


14 


+ 2 


O 






2 


3 


4 


4 


5 


6 


7 


7 


15 


4 


o 




2 


2 


3 


4 


5 


6 


7 


7 


8 


16 


6 


o 




2 


3 


4 


4 


5 


6 


7 


8 


9 


18 


8 


o 




2 


3 


4 


5 


6 


7 


8 


9 


10 


19 


10 


+ 1 




2 


3 


4 


5 


6 


7 


8 


9 


10 


21 


12 






2 


3 


4 


6 


7 


8 


9 


10 


II 


22 


14 






2 


4 


5 


6 


7 


8 


9 


II 


12 


24 ' 


i6 






3 


4 


5 


6 


8 


9 


10 


II 


13 


25 t 


i8 






3 


4 


5 


7 


8 


9 


II 


12 


13 


27 


20 






3 


4 


6 


7 


9 


10 


II 


13 


14 


29 


22 




2 


3 


5 


6 


8 


9 


II 


12 


14 


15 


31 


24 




2 


3 


5 


7 


8 


10 


II 


13 


15 


16 


33 


26 




2 


3 


5 


7 


9 


10 


12 


14 


16 


17 


35 


28 




2 


4 


6 


7 


9 


II 


13 


15 


17 


19 


37 


30 




2 


4 


6 


8 


10 


12 


14 


16 


18 


20 


41 


32 




2 


4 


7 


9 


II 


13 


16 


18 


20 


22 


44 


34 




2 


5 


7 


10 


12 


15 


17 


19 


22 


24 


49 


36 




3 


5 


8 


II 


13 


16 


19 


21 


24 


27 


53 


38 




3 


6 


9 


12 


15 


iS 


21 


23 


26 


29 


59 


40 


2 


3 


6 


ID 


13 


16 


19 


23 


26 


29 


32 


64 


42 


2 


4 


7 


II 


14 


18 


21 


25 


28 


32 


35 


71 


44 


2 


4 


8 


12 


15 


19 


23 


27 


31 


35 


39 


77 


46 


2 


4 


8 


13 


17 


21 


25 


29 


34 


38 


42 


84 


48 


2 


5 


9 


14 


18 


23 


27 


32 


37 


41 


46 


92 


50 


2 


5 


lO 


15 


20 


25 


30 


35 


40 


45 


50 


99 


52 


3 


5 


II 


i6 


21 


27 


32 


37 


43 


48 


53 


107 , 


54 


3 


6 


II 


17 


23 


29 


34 


40 


46 


51 


57 


114 


56 


3 


6 


12 


i8 


24 


30 


37 


43 


49 


55 


61 


122 1 


58 


3 


6 


13 


19 


26 


32 


39 


45 


52 


58 


65 


130 


60 


3 


7 


14 


21 


27 


34 


41 


48 


55 


62 


69 


137 


62 


4 


7 


14 


22 


29 


36 


43 


51 


58 


65 


72 


145 


64 


4 


8 


15 


23 


30 


38 


46 


53 


61 


69 


76 


152 


66 


4 


8 


i6 


24 


32 


40 


48 


56 


64 


72 


80 


160 


68 


4 


8 


17 


25 


34 


42 


50 


59 


67 


76 


84 


168 


70 


4 


9 


i8 


26 


35 


44 


53 


61 


70 


79 


88 


175 


72 


5 


9 


i8 


27 


37 


46 


55 


64 


73 


82 


91 


183 


76 


5 


ID 


20 


30 


40 


49 


59 


69 


79 


89 


99 


198 


80 


5 


II 


21 


32 


43 


53 


64 


75 


85 


96 


106 


213 


84 


6 


II 


23 


34 


46 


57 


68 


80 


91 


103 


114 


228 


88 


6 


12 


24 


37 


49 


61 


73 


85 


97 


no 


122 


243 


92 


6 


13 


26 


39 


52 


65 


78 


91 


103 


116 


129 


259 


96 


7 


14 


27 


41 


55 


68 


82 


96 


no 


123 


137 


274 



Smithionian Table*. 



141 



Table 55. 

DETERMINATION OF HEIGHTS BY THE BAROMETER. 

ENGLISH MEASURES. 



Correction for the Variation of Gravity with Altitude : 



Z (Z + 2 //q) 



Approx- 






HEIGHT 


OF LOWER STATION IN FEET [ha). 




i 


imate 
diffeience 


















































of 

height. 

Z. 





1000 


2000 


3000 


4000 


5000 


6000 


7000 


8000 


9000 


10000 


12000 


Fee'. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


500 



































+ 1 


lOOO 

















+ 1 


+ 1 


+ 1 


+ 1 


+ 1 


+ 1 


I 


1500 











+ 1 


+ 1 


I 


I 


I 


I 


I 


2 


2 


2000 








+ 1 


I 


I 


I 


I 


2 


2 


2 


2 


2 


2500 





+ 1 


I 


I 


I 


I 


2 


2 


2 


2 


3 


3 


3000 







I 


I 


2 


2 


2 


2 


3 


3 


3 


4 


3500 


+ 1 




I 


2 


2 


2 


3 


3 


3 


4 


4 


5 


4000 


I 




2 


2 


2 


3 


3 


3 


4 


4 


5 


5 


4500 


I 




2 


2 


3 


3 


4 


4 


4 


5 


5 


6 


5000 


I 


2 


2 


3 


3 


4 


4 


5 


5 


6 


6 


7 


5500 


I 


2 


3 


3 


4 


4 


5 


5 


6 


6 


7 


8 


6000 


2 


2 


3 


3 


4 


5 


5 


6 


6 


7 


7 


9 


6500 


2 


3 


3 


4 


5 


5 


6 


6 


7 


8 


8 


9 


7000 


2 


3 


4 


4 


5 


6 


6 


7 


8 


8 


9 


10 


7500 


3 


3 


4 


5 


6 


6 


7 


8 


8 


9 


IG 


II 


Sooo 


3 


4 


5 


5 


6 


7 


8 


8 


9 


10 


II 


12 


8500 


3 


4 


5 


6 


7 


8 


8 


9 


10 


II 


12 


13 


9000 


4 


5 


6 


6 


7 


8 


9 


10 


II 


12 


12 


14 


9500 


4 


5 


6 


7 


8 


9 


10 


II 


12 


13 


13 


15 


10000 


5 


6 


7 


8 


9 


10 


II 


II 


12 


13 


14 


16 


1 1000 


6 


7 


S 


9 


10 


II 


12 


13 


14 


15 


16 


18 


12000 


7 


8 


9 


10 


II 


13 


14 


15 


t6 


17 


18 


21 


13000 


8 


9 


II 


12 


13 


14 


16 


17 


18 


15 


21 


23 


14000 


9 


II 


12 


13 


15 


16 


17 


19 


20 


21 


23 


25 


15000 


II 


12 


14 


15 


17 


18 


19 


21 


22 


24 


25 


28 


16000 


12 


14 


15 


17 


18 


20 


21 


23 


25 


26 


28 


31 


17000 


14 


15 


17 


19 


20 


22 


24 


25 


27 


28 


30 




18000 


16 


17 


19 


21 


22 


24 


26 


28 


30 


31 






19000 


17 


19 


21 


23 


25 


26 


28 


30 


32 








20000 


19 


21 


23 


25 


27 


29 


31 













Smithsonian Tables. 



142 



Table 56. 
DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 

Values of 18400 log ^~^- 
o 





Barometric' 












~- 






1 




Pressure 


u 


1 


2 


3 


4 


5 


6 


7 


8 


9 . 




mm. 
300 


m. 
7428 


ni. 
7401 


m. 

7375 


m. 
7348 


m. 
7322 


111. 
7296 


m. 
7270 


ni. 
7244 


111. 
7218 


m. 

7192 

6937 
6691 

6451 
6219 




310 
320 
330 
340 


7166 
6912 
6666 
642S 


7140 
6887 
6642 
6405 


7115 
6862 
6618 
6381 


7089 
6838 
6594 
6358 


7064 
6813 
6570 
6334 


7038 
6789 
6546 
6311 


7013 
6764 
6522 
6288 


6987 
6740 
6498 
6265 


6962 
6715 
6475 
6242 




350 

360 


6196 
5971 


6173 
5949 


6151 
5927 


612S 
5905 


6106 

5883 


6083 
5861 


6061 
5839 


6038 
5817 


6016 
5795 


5993 
5773 
5560 




370 
380 


5752 


5730 


5709 


56S7 


5666 


5644 


5623 


5602 


5581 




5539 


5518 


5497 


5476 


5455 


5434 


5414 


5393 


5373 


5352 




390 


5332 


53 1 1 


5291 


5270 


5250 


5229 


5209 


5189 


5169 


5149 




400 


5129 


5109 


5089 


5069 


5049 


5029 


5010 


4990 


4971 


4951 
4758 




410 


4932 


4912 


4893 


4S73 


4854 


4834 


4815 


4796 


4777 




420 


4739 


4720 


4701 


4682 


4663 


4644 


4625 


4606 


4588 


4569 




430 


4551 


4532 


4514 


4495 


4477 


4458 


4440 


4422 


4404 


4386 




440 


4368 


4350 


4332 


4314 


4296 


4278 


4260 


4242 


4224 


4206 




450 

460 
470 
480 


4188 


4170 


4152 


4134 


4117 


4099 


4082 


4064 


4047 


4029 




4012 
3840 
3672 


3994 
3823 
3655 


3977 
3806 

3639 


3959 
3789 
3622 


3942 
3772 
3606 


3925 
3755 
3589 


3908 
3738 
3573 


3891 
3721 
3556 


3874 
3705 
3540 


3857 
3688 
3523 




490 


3507 


3490 


3474 


3458 


3442 


3426 


3410 


3394 


3378 


3362 




500 


3346 
3188 


3330 


3314 


3298 


3282 


3266 


3250 


3235 


3219 


3203 




510 


3172 


3157 


3141 


3126 


3110 


3095 


3079 


3064 


3048 




520 


3033 


3017 


3002 


2986 


2971 


2955 


2940 


2925 


2910 


2895 




530 


2880 


2865 


2850 


2835 


2820 


2805 


2790 


2775 


2760 


2745 




540 


2731 


2716 


2701 


2687 


2672 


2657 


2643 


2628 


2613 


2599 




550 

560 


2584 


2570 


2555 


2541 


2526 


2512 


2497 


2483 


2468 


2454 




2440 


2426 


241 1 


2397 


2383 


2369 


2355 


2341 


2327 


2313 




570 
580 


2299 


22S5 


2271 


2257 


2243 


2229 


2215 


2201 


2188 


2174 




2160 


2146 


2133 


2119 


2105 


2092 


2078 


2064 


2051 


2037 




590 


2023 


2010 


1996 


1983 


1969 


1956 


1942 


1929 


1915 


1902 




600 

610 


1889 


1875 


1862 


1848 


1835 


1822 


1809 


1796 


1783 


1770 




1757 


1744 


1731 


1718 


1705 


1692 


1679 


1666 


1653 


1640 




620 
630 
640 


1627 


1614 


i6or 


1588 


1576 


1563 


1550 


1537 


1525 


1512 




1499 


i486 


1474 


1461 


1448 


1436 


1423 


1411 


1398 


1386 




1373 


1361 


1348 


1336 


1323 


•1311 


1298 


1286 


1273 


1261 




650 

660 
670 


1249 


1236 


1224 


1212 


1 199 


1187 


1175 


1 163 


1151 


1 139 




1127 


1115 


1 103 


1091 


1079 


1067 


1055 


1043 


1031 


1019 




1007 


995 


983 


971 


960 


948 


936 


924 


913 


901 




6S0 
690 


889 


877 


866 


854 


842 


831 


819 


807 


796 


784 




772 


761 


749 


738 


726 


715 


703 


692 


680 


669 




700 


657 


646 


635 


623 


612 


601 


589 


578 


567 


555 




710 


544 


533 


521 


510 


499 


487 


476 


465 


454 


443 




720 


432 


421 


410 


399 


3S8 


377 


366 


355 


344 


333 




730 


322 


311 


300 


289 


278 


267 


256 


245 


234 


224 




740 


213 


202 


192 


181 


170 


160 


149 


138 


128 


117 




750 

760 


-f-io6 


+ 95 


+ 85 


+ 74 


+ 64 


+ 53 


f 43 


+ 32 


+ 22 


+ II 







— 10 


— 21 


- 31 


- 42 


- 52 


- 63 


- 73 


- 83 


- 94 




770 


— 104 


-115 


-125 


-136 


-146 


-156 


-166 


-177 


-187 


-197 


St 


IITH80NUN T 


^BlES. 





















143 



Table 57. 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 

DYNAMIC MEASURES. 
TT-, r .o... ,„„ IOI3-3 













I 104UU 1 


"^ B 










Baro- 
metric 





1 


2 


3 


4 


5 


6 


7 


8 


9 


Pressure 






















mb. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 





CO 


55306 


49767 


46527 


44228 


42445 


40988 


39756 


38689 


37748 


lO 


36906 


36144 


35448 


34809 


34217 


33666 


33150 


32665 j 


32209 


31777 


20 


31367 


30977 


30605 


30250 


29910 


29584 


29270 


28969 


28678 


28397 


30 


28127 


27865 


27611 


27365 


27126 


26895 


26670 


26451 


26238 


26031 


40 


25828 


25630 


25438 


25250 


25066 


24887 


24711 


24539 


24371 


24206 


50 


24043 


23886 


23731 


23579 


23430 


23283 


23139 


22998 


22859 


22722 


60 


22588 


22456 


22326 


22198 


22072 


21948 


21827 


21706 


21587 


21471 


70 


21356 


21242 


21131 


2 102 1 


20912 


20805 


20699 


20594 


20491 


20389 


80 


20289 


20189 


20092 


19995 


19899 


19804 


19711 


19618 


19527 


19437 


90 


19348 


19259 


19172 


19086 


19000 


18916 


18832 


18749 


18667 


18586 


100 


18506 


18426 


1S347 


18269 


18192 


18116 


18040 


17965 


17891 


17817 


no 


17744 


17672 


17600 


17529 


17459 


17389 


17320 


17251 


17183 


17115 


120 


17049 


16982 


16917 


16851 


16787 


16722 


16659 


16596 


16533 


16471 


130 


16409 


16348 


16287 


16227 


16167 


16108 


16048 


15990 


15932 


15874 


140 


I58I7 


15760 


15703 


15647 


15592 


15536 


15482 


15427 


15373 


15319 


150 


15266 


15212 


15160 


15107 


15055 


15004 


14952 


14901 


14850 


14800 


160 


14750 


14700 


14650 


1 460 1 


14553 


14504 


14456 


14408 


14360 


14312 


170 


14265 


14218 


14172 


14125 


14079 


14034 


13988 


13943 


13898 


13853 


180 


13809 


13764 


13720 


13677 


13633 


13590 


13547 


13504 


13461 


13419 


190 


13377 


13335 


13293 


13251 


13210 


13169 


13128 


13087 


13047 


13007 


200 


12967 


12927 


12887 


12848 


12808 


12769 


12730 


12692 


12653 


12615 


210 


12577 


12539 


12501 


1 2463 


12426 


12389 


12352 


12315 


12278 


12242 


220 


I 2 20s 


1 2 169 


12133 


12097 


1^061 


12026 


1 1990 


11955 


11920 


11885 


230 


1 1850 


11815 


11781 


1 1 746 


11712 


11678 


1 1644 


11610 


11577 


"543 


240 


II5I0 


11476 


II 443 


11410 


11378 


1 1345 


11312 


1 1 280 


II 248 


11216 


250 


1 1 184 


11152 


TI120 


1 1088 


11057 


11025 


10994 


10963 


10932 


1 090 1 


260 


10870 


10839 


10809 


10778 


10748 


10718 


10688 


10658 


10628 


10598 


270 


10569 


10539 


105 10 


10480 


1045 1 


10422 


10393 


10364 


10335 


10307 


280 


10278 


10249 


10221 


10193 


10165 


10137 


10108 


10081 


10053 


10025 


290 


9997 


9970 


9943 


9915 


9888 


9861 


9834 


9807 


9780 


9753 


300 


9727 


9700 


9674 


9647 


9621 


9594 


9568 


9542 


9516 


9490 


310 


9465 


9439 


9413 


9388 


9362 


9337 


9311 


9286 


9261 


9236 


320 


9211 


9186 


9161 


9136 


9111 


9087 


9062 


9038 


9014 


8989 


330 


8965 


8941 


8917 


8893 


8869 


8845 


8821 


8797 


8773 


8750 


340 


8726 


8703 


8679 


8656 


8633 


8610 


8587 


8564 


8541 


8518 


350 


8495 


8472 


8449 


8427 


8404 


8381 


8359 


8336 


8314 


8292 


360 


8270 


8247 


8225 


8203 


8181 


8x59 


8138 


8116 


8094 


8073 


370 


8051 


8029 


8008 


7986 


7965 


7943 


7922 


7901 


7880 


7859 


380 


7838 


7817 


7796 


7775 


7754 


7733 


7712 


7692 


7671 


7651 


390 


7630 


7610 


7589 


7569 


7548 


7528 


7508 


7488 


7468 


7448 


400 


7428 


7408 


7388 


7368 


7348 


7328 


7309 


7289 


7269 


7250 


410 


7230 


7211 


7191 


7172 


7153 


7133 


7114 


7095 


7076 


7057 


420 


7038 


7019 


7000 


6981 


6962 


6943 


6924 


6906 


6887 


6868 


430 


6850 


6831 


6813 


6794 


6776 


6757 


6739 


6721 


6703 


6684 


440 


6666 


6648 


6630 


6612 


6594 


6576 


6558 


6540 


6522 


6504 


450 


6487 


6469 


6451 


6433 


6416 


6398 


6381 


6363 


6346 


6328 


460 


6311 


6294 


6276 


6259 


6242 


6225 


6207 


6190 


6173 


6156 


470 


6139 


6122 


6105 


6088 


6071 


6055 


6038 


6021 


6004 


5987 


4S0 


5071 


5954 


5937 


5921 


5904 


5888 


5871 


5855 


5839 


5822 


490 


5806 


5790 


5773 


5757 


! 5741 


5725 


5709 


5693 


5677 


5661 



'Smithsonian Tables. 



144 



Table 57. 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 

DYNAMIC MEASURES. 













* XiJ^\.J\J 


-s 5 










Barometric 
Pressure 





1 


2 


3 


4 


5 


6 


7 


8 


9 


mb. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


500 


5645 


5629 


5613 


5597 


5581 


5565 


5549 


5533 


5518 


5502 


5IO 


5486 


5471 


5455 


5439 


5424 


5408 


5393 


5377 


5362 


5346 


520 


5331 


5316 


5300 


5285 


5270 


525s 


5239 


5224 


5209 


5194 


530 


5179 


5164 


5149 


5134 


5119 


5104 


5089 


5074 


5059 


5044 


540 


5030 


5015 


5000 


4985 


4971 


4956 


4941 


4927 


4912 


4898 


550 


4883 


4868 


4854 


4839 


4825 


4811 


4796 


4782 


4768 


4753 


560 


4739 


4725 


4710 


4696 


4682 


4668 


4654 


4640 


4626 


4612 


570 


4598 


4583 


4569 


4556 


4542 


4528 


4514 


4500 


4486 


4472 


580 


4459 


4445 


4431 


4417 


4404 


4390 


4376 


4363 


4349 


4335 


590 


4322 


4308 


4295 


4281 


4268 


4254 


4241 


4228 


4214 


4201 


600 


4188 


4174 


4161 


4148 


4134 


4121 


4108 


409s 


4082 


4069 


610 


4056 


4042 


4029 


4016 


4003 


3990 


3977 


3964 


3951 


3939 


620 


3926 


3913 


3900 


3887 


3874 


3861 


3849 


3836 


3823 


3810 


630 


3798 


3785 


3772 


3760 


3747 


3735 


3722 


3709 


3697 


3684 


640 


3672 


3659 


3647 


3635 


3622 


3610 


3597 


3585 


3573 


3560 


650 


3548 


3536 


3523 


35" 


3499 


3487 


3475 


3462 


3450 


3438 


660 


3426 


3414 


3402 


3390 


3378 


3366 


3354 


3342 


3330 


3318 


670 


3306 


3294 


3282 


3270 


3258 


3246 


3235 


3223 


3211 


3199 


680 


3187 


3176 


3164 


3152 


3141 


3129 


3117 


3106 


3094 


3082 


690 


3071 


3059 


3048 


3036 


3025 


3013 


3002 


2990 


2979 


2967 


700 


2956 


2944 


2933 


2922 


2910 


2899 


2888 


2876 


2865 


2854 


710 


2842 


2831 


2820 


28C39 


2798 


2786 


2775 


2764 


2753 


2742 


720 


2731 


2720 


2708 


2697 


2686 


2675 


2664 


2653 


2642 


2631 


730 


2621 


2609 


2599 


2588 


2577 


2566 


2555 


2544 


2533 


2523 


740 


2512 


2501 


2490 


2479 


2469 


2458 


2447 


2437 


2426 


2415 


750 


2405 


2394 


2383 


2373 


2362 


2351 


2341 


2330 


2320 


2309 


760 


2299 


2288 


2278 


2267 


2257 


2246 


2236 


2225 


2215 


2205 


770 


2194 


2184 


2173 


2163 


2153 


2142 


2132 


2122 


2112 


2101 


780 


2091 


2081 


2071 


2060 


2050 


2040 


2030 


2020 


2009 


1999 


790 


1989 


1979 


1969 


1959 


1949 


1939 


1929 


1919 


1909 


1899 


800 


1889 


1879 


1869 


1859 


1849 


1839 


1829 


1S19 


1809 


1799 


810 


1789 


1780 


1770 


1760 


1750 


1740 


1731 


1721 


1711 


1 701 


820 


1692 


1682 


1672 


1662 


1653 


1643 


1633 


1623 


1614 


1604 


830 


1595 


1585 


1575 


1566 


1556 


1547 


1537 


1527 


1518 


1508 


840 


1499 


1489 


1480 


1470 


1461 


1451 


1442 


1433 


1423 


1414 


850 


1404 


1395 


1386 


1376 


1367 


1357 


1348 


1339 


1329 


1320 


860 


1311 


1302 


1292 


1283 


1274 


1264 


1255 


1246 


1237 


1228 


870 


1218 


1209 


1200 


II9I 


1182 


"73 


1 164 


"54 


1 145 


1136 


880 


1127 


1118 


1 109 


1 100 


109 1 


1082 


1073 


1064 


IOS5 


1046 


890 


1037 


1028 


1019 


lOIO 


lOOI 


992 


983 


974 


965 


956 


900 


948 


939 


930 


921 


912 


903 


894 


886 


877 


868 


910 


859 


850 


842 


833 


824 


815 


807 


798 


789 


781 


920 


772 


763 


755 


746 


737 


729 


720 


711 


703 


694 


930 


&86 


677 


668 


660 


651 


643 


634 


626 


617 


608 


940 


600 


592 


583 


575 


566 


558 


549 


541 


532 


524 


950 


516 


507 


499 


490 


482 


474 


465 


457 


448 


440 


960 


432 


424 


415 


407 


399 


390 


382 


374 


365 


357 


970 


349 


341 


332 


324 


316 


308 


300 


292 


283 


275 


980 


267 


259 


251 


243 


234 


226 


218 


210 


202 


194 


990 


186 


178 


170 


162 


154 


146 


138 


130 


122 


114 


1000 


106 


98 


90 


82 


74 


66 


58 


50 


42 


34 


lOIO 


26 


18 


10 


'> 


- 6 


- 13 


— 21 


- 29 


- 37 


- 45 


1020 


- 53 


- 61 


- 68 


- 76 


- 84 


- 92 


— 100 


-107 


-115 


-123 


1030 


-131 


-138 


— 146 


-154 


— 162 


— i6g 


-177 


-185 


-192 


— 200 

-277 

1 


1040 


-208 


-215 


-223 


-231 


-238 


— 246 


-254 


— 261 


— 269 



Smithsonian Tables. 



145 



Table 58. 

DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 
Temperature correction factor, a = .00367 0. 

Multiply approximate altitudes, determined from table 56 or 57, by values of a corresponding to 
mean temperature, 0, of air column. Add, if is above 0° C; subtract, if below 0° C. 



Mean 
Temp. 9 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


°c. 


a. 


(7. 


a. 


a. 


(I. 


a. 


a. 


a. 


a. 


a. 





0.000 


0.000 


0.00 1 


O.OOI 


O.OOI 


0.002 


0.002 


0.003 


0.003 


0.003 


I 


.004 


.004 


.004 


.005 


.005 


.006 


.006 


.006 


.007 


.007 


2 


.007 


.008 


.008 


.008 


.009 


.009 


.010 


.010 


.010 


.Oil 


3 


.oil 


.Oil 


.012 


.012 


.012 


.013 


.013 


.014 


.014 


.014 


4 


.015 


.015 


.015 


.016 


.016 


.017 


.017 


.017 


.018 


.018 


5 


.018 


.019 


.019 


.019 


.020 


.020 


.021 


.021 


.021 


.022 


6 


.022 


.022 


.023 


.023 


.023 


.024 


.024 


.025 


.025 


.025 


7 


.026 


.026 


.026 


.027 


.027 


.028 


.028 


.028 


.029 


.029 


8 


.029 


.030 


.030 


.030 


.031 


.031 


.032 


.032 


.032 


•033 


9 


•033 


•033 


•034 


•034 


•034 


■03 s 


■03 s 


.036 


.036 


.036 


10 


•037 


•037 


•037 


.038 


.038 


■039 


•039 


•039 


.040 


.040 


II 


.040 


.041 


.041 


.041 


.042 


.042 


•043 


•043 


•043 


.044 


12 


.044 


.044 


•045 


•043 


.040 


.046 


.046 


.047 


.047 


.047 


13 


.048 


.048 


.048 


.049 


■049 


.050 


.050 


.050 


.051 


.051 


14 


.051 


.052 


.052 


,052 


•053 


•053 


■054 


•054 


•054 


•05 s 


15 


•055 


■055 


.056 


.056 


•057 


•057 


•057 


.058 


.058 


.058 


16 


•059 


•059 


•059 


.060 


.060 


.061 


.061 


.061 


.062 


.062 


17 


.062 


.06^ 


.063 


.063 


.064 


.064 


.065 


.065 


.065 


.066 


18 


.066 


.066 


.067 


.067 


.068 


.068 


.068 


.069 


.069 


.069 


19 


.070 


.070 


.070 


.071 


.071 


.072 


.072 


.072 


•073 


•073 


20 


•073 


.074 


.074 


■075 


•075 


•075 


.076 


.076 


.076 


.077 


21 


.077 


.077 


.078 


.078 


.079 


.079 


.079 


.080 


.080 


.080 


22 


.081 


.081 


.081 


.082 


.082 


.083 


.083 


.083 


.084 


.084 


23 


.084 


.085 


.085 


.086 


.086 


.086 


.087 


.087 


.087 


.088 


24 


.0S8 


.088 


.089 


.089 


.090 


.090 


.090 


.091 


.091 


.091 


25 


.002 


.092 


.092 


•093 


•093 


.094 


.094 


.094 


■095 


•095 


26 


•095 


.096 


.096 


.097 


.097 


.097 


.098 


.098 


.098 


.099 


27 


.099 


.099 


.100 


.100 


.101 


.101 


.101 


.102 


.102 


.102 


28 


.103 


.103 


.103 


.104 


.104 


.105 


.105 


.105 


.106 


.106 


29 


.106 


.107 


.107 


.108 


.108 


.108 


.109 


.109 


.109 


.110 


30 


.110 


.110 


.III 


.III 


.112 


.112 


.112 


•113 


•113 


•113 


31 


.114 


.114 


•IIS 


•115 


•115 


.116 


.116 


.116 


.117 


.117 


32 


.117 


.118 


.118 


.119 


.119 


.119 


.120 


.120 


.120 


.121 


33 


.121 


.121 


.122 


.122 


•123 


.123 


.123 


.124 


.124 


.124 


34 


•125 


•125 


.126 


.126 


.126 


.127 


.127 


.127 


.128 


.128 


35 


.128 


.129 


.129 


.130 


.130 


.130 


•131 


•131 


•131 


.132 


36 


.132 


.132 


•133 


•133 


•134 


•134 


•134 


•135 


•135 


•135 


37 


.136 


.136 


•137 


•137 


•137 


.138 


.138 


."138 


•139 


•139 


38 


■139 


.140 


.140 


.141 


.141 


.141 


.142 


.142 


.142 


•143 


39 


•143 


•143 


•144 


.144 


■145 


•145 


•145 


.146 


.146 


.146 


40 


.147 


■147 


.148 


.148 


.148 


.149 


•149 


.149 


.150 


.150 


41 


■150 


■151 


•151 


•152 


.152 


•152 


•153 


•153 


•153 


•154 


42 


•154 


•15s 


•155 


•155 


.156 


.156 


• 156 


•157 


•157 


•157 


43 


.158 


.158 


•159 


•159 


•159 


.160 


.160 


.160 


.161 


.161 


44 


.161 


.162 


.162 


.163 


.163 


•163 


.164 


.164 


.164 


.165 


45 


.165 


.166 


.166 


.166 


.167 


.167 


.167 


.168 


.168 


.168 


46 


.169 


.169 


.170 


.170 


.170 


.171 


•171 


.171 


.172 


.172 


47 


.172 


•173 


•173 


.174 


.174 


.174 


•17s 


•175 


•175 


.176 


48 


.176 


.177 


.177 


.177 


.178 


.178 


.178 


•179 


.179 


.179 


49 


.180 


.180 


.181 


.181 


.181 


.182 


.182 


.182 


•183 


.183 


50 


.184 


.184 


.184 


.185 


.185 


•185 


.186 


.186 


.186 


.187 



Smithsonian Tables. 



146 



Table 59. 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 

Term for Temperature: 0.00367 ^ X z. 

For temperatures {^^ove o°C.|^^^ ^^^^^^ ^^^ ^^ be { *^^^f^-^,^^ 



Approx- 




























imate 


MEAN 


TEMPERATURE OF AIR 


COLUMN IN 


CENTIGRADE DEGREES {$)■ \\ 


differ- 
ence of 




















































1 


lieiglit. 
Z. 


1° 


2° 


3° 


4° 


5° 


6° 


7° 


8° 


9° 


10° 


20° 


30° 


40° 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


100 





I 


I 


I 


2 


2 


3 


3 


3 


4 


7 


II 


15 


200 


I 


I 


2 


3 


4 


4 


5 


6 


7 


7 


15 


22 


29 


300 


I 


2 


3 


4 


6 


7 


8 


9 


10 


II 


22 


33 


44 


400 


I 


3 


4 


6 


7 


9 


10 


12 


13 


15 


29 


44 


59 


500 


2 


4 


6 


7 


9 


II 


13 


15 


17 


18 


37 


55 


73 


600 


2 


4 


7 


9 


II 


13 


15 


18 


20 


22 


44 


66 


88 


700 


3 


5 


8 


10 


13 


15 


18 


21 


23 


26 


51 


' 77 


103 


800 


3 


6 


9 


12 


15 


18 


21 


23 


26 


29 


59 


88 


117 


900 


3 


7 


10 


13 


17 


20 


23 


26 


30 


33 


66 


99 


132 


1000 


4 


7 


II 


15 


18 


22 


26 


29 


33 


37 


73 


no 


147 


IIOO 


4 


8 


12 


16 


20 


24 


28 


32 


36 


40 


81 


121 


161 


1200 


4 


9 


13 


18 


22 


26 


31 


35 


40 


44 


88 


132 


176 


1300 


5 


10 


14 


19 


24 


29 


33 


38 


43 


48 


95 


143 


191 


1400 


5 


10 


15 


21 


26 


31 


36 


41 


46 


51 


103 


154 


206 


1500 


6 


II 


17 


22 


28 


33 


39 


44 


50 


55 


no 


165 


220 


1600 


6 


12 


18 


23 


29 


35 


41 


47 


53 


59 


117 


176 


235 


1700 


6 


12 


19 


25 


31 


37 


44 


50 


56 


62 


125 


187 


250 


1800 


7 


13 


20 


26 


33 


40 


46 


53 


59 


66 


132 


198 


264 


1900 


7 


14 


21 


28 


35 


42 


49 


56 


63 


70 


139 


209 


279 


2000 


7 


15 


22 


29 


37 


44 


51 


59 


66 


73 


147 


220 


294 


2100 


8 


15 


23 


31 


39 


46 


54 


62 


69 


77 


154 


231 


308 


2200 


8 


16 


24 


32 


40 


48 


57 


65 


73 


81 


161 


242 


323 


2300 


8 


17 


25 


34 


42 


51 


59 


68 


76 


84 


169 


253 


338 


2400 


9 


18 


26 


35 


44 


53 


62 


70 


79 


88 


176 


264 


352 


2500 


9 


18 


28 


37 


46 


55 


64 


73 


83 


92 


184 


275 


367 


2600 


10 


19 


29 


38 


48 


57 


67 


76 


86 


95 


191 


2S6 


382 


2700 


10 


20 


30 


40 


50 


59 


69 


79 


89 


99 


198 


297 


396 


2800 


10 


21 


31 


41 


51 


62 


72 


82 


92 


103 


206 


308 


411 


2900 


II 


21 


32 


43 


53 


64 


75 


85 


96 


106 


213 


319 


426 


3000 


II 


22 


33 


44 


55 


66 


77 


88 


99 


no 


220 


330 


440 


3100 


II 


23 


34 


46 


57 


68 


80 


91 


102 


114 


228 


341 


455 


3200 


12 


23 


35 


47 


59 


70 


82 


94 


106 


117 


235 


352 


470 


3300 


12 


24 


36 


48 


61 


73 


85 


97 


109 


121 


242 


363 


484 


3400 


12 


25 


37 


50 


62 


75 


87 


100 


112 


125 


250 


374 


499 


3500 


13 


26 


39 


51 


64 


77 


90 


103 


116 


128 


257 


385 


514 


3600 


13 


26 


40 


53 


66 


79 


92 


106 


119 


132 


264 


396 


528 


3700 


14 


27 


41 


54 


68 


81 


95 


109 


122 


136 


272 


407 


543 


3800 


14 


28 


42 


56 


70 


84 


98 


112 


126 


139 


279 


418 


558 


3900 


14 


29 


43 


57 


72 


86 


100 


115 


129 


143 


286 


429 


573 


4000 


15 


29 


44 


59 


73 


88 


103 


117 


132 


147 


294 


440 


587 


5000 


18 


37 


55 


73 


92 


no 


128 


147 


165 


183 


367 


551 


734 


6000 


22 


44 


66 


88 


no 


132 


154 


176 


198 


220 


440 


661 


881 


7000 


26 


51 


77 


103 


128 


154 


180 


206 


231 


257 


514 


771 


1028 



Smithsonian Tables. 



147 



Table 60. 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 
Correction for Humidity: Values of 10000/?. 

^ = 0.378 1 = 0.378 ^Jj^. 



Mean 






ME.'VN 


B.\ROMETRIC PRESSURE IN MILLIMETERS ( ) 






Vapor 






















V 


2 / 






Pressure. 






























„ ei+en 
'= 2 


500 


520 


540 


560 


580 


600 


620 


640 


660 


680 


700 


720 


740 


760 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


1 


8 


7 


7 


7 


7 


6 


6 


6 


6 


6 


5 


5 


5 


5 


2 


15 


15 


14 


14 


13 


13 


12 


12 


II 


II 


II 


II 


10 


10 


3 


23 


22 


21 


20 


20 


19 


18 


18 


17 


17 


16 


16 


15 


15 


4 


30 


29 


28 


27 


26 


25 


24 


24 


23 


22 


22 


21 


20 


20 


5 


38 


36 


35 


34 


33 


31 


30 


30 


29 


28 


27 


26 


26 


25 


6 


45 


44 


42 


41 


39 


38 


37 


35 


34 


33 


32 


32 


31 


30 


7 


53 


51 


49 


47 


46 


44 


43 


41 


40 


39 


38 


37 


36 


35 


8 


60 


58 


56 


54 


52 


50 


49 


47 


46 


44 


43 


42 


41 


40 


9 


68 


65 


63 


61 


59 


57 


55 


53 


52 


50 


49 


47 


46 


45 


10 


76 


73 


70 


68 


65 


63 


61 


59 


57 


56 


54 


53 


51 


50 


II 


83 


80 


77 


74 


72 


69 


67 


65 


63 


61 


59 


58 


56 


55 


12 


91 


87 


84 


81 


78 


76 


73 


71 


69 


67 


65 


63 


61 


60 


13 


98 


95 


91 


88 


85 


82 


79 


77 


74 


72 


70 


68 


66 


65 


14 


106 


102 


98 


95 


91 


88 


85 


83 


80 


78 


76 


74 


72 


70 


15 


113 


109 


105 


lOI 


98 


95 


91 


89 


86 


83 


81 


79 


77 


75 


16 


121 


116 


112 


108 


104 


lOI 


98 


94 


92 


89 


86 


84 


82 


80 


17 


129 


124 


119 


115 


III 


107 


104 


100 


97 


94 


92 


89 


87 


85 


18 


136 


131 


126 


122 


117 


"3 


no 


106 


103 


100 


97 


95 


92 


90 


19 


144 


138 


133 


128 


124 


120 


116 


112 


109 


106 


103 


100 


97 


95 


20 


151 


145 


140 


135 


130 


126 


122 


118 


115 


III 


108 


105 


102 


99 


21 


159 


153 


147 


142 


137 


132 


128 


124 


120 


117 


113 


no 


107 


104 


22 


166 


160 


154 


149 


143 


139 


134 


130 


126 


122 


119 


116 


112 


109 


23 


174 


167 


161 


155 


150 


145 


140 


136 


132 


128 


124 


121 


117 


114 


24 


181 


174 


168 


162 


156 


151 


146 


142 


137 


133 


130 


126 


123 


119 


25 


189 


1S2 


175 


169 


163 


157 


152 


148 


143 


139 


135 


131 


128 


124 


26 


197 


189 


182 


175 


169 


164 


159 


154 


149 


145 


140 


137 


133 


129 


27 


204 


196 


189 


182 


176 


170 


165 


159 


155 


150 


146 


142 


138 


134 


28 


212 


204 


196 


189 


182 


176 


171 


165 


160 


156 


151 


147 


143 


139 


29 


219 


211 


203 


196 


189 


183 


177 


171 


166 


161 


157 


152 


148 


144 


30 


227 


218 


210 


203 


196 


189 


183 


177 


172 


167 


162 


158 


153 


149 


31 


234 


225 


217 


209 


202 


195 


1 89 


183 


178 


172 


167 


163 


158 


154 


32 


242 


233 


224 


216 


209 


202 


195 


189 


183 


178 


173 


168 


163 


159 


33 


249 


240 


231 


223 


215 


208 


201 


195 


189 


183 


178 


173 


169 


164 


34 


257 


247 


238 


230 


222 


214 


207 


201 


195 


189 


184 


179 


174 


169 


35 


265 


254 


245 


236 


228 


220 


213 


207 


200 


195 


189 


184 


179 


174 


36 


272 


262 


252 


243 


235 


227 


219 


213 


206 


200 


194 


189 


184 


179 


37 


280 


269 


259 


250 


241 


233 


226 


219 


212 


206 


200 


194 


189 


184 


38 


287 


276 


266 


257 


248 


239 


232 


224 


218 


211 


205 


200 


194 


189 


39 


295 


283 


273 


263 


254 


246 


238 


230 


223 


217 


211 


205 


199 


194 


40 


302 


291 


280 


270 


261 


252 


244 


236 


229 


222 


216 


210 


204 


199 



Smithsonian Tables. 



148 



Table 60. 
DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 
Correction for Humidity: looooySxz. 
Top argument : Values of loooo f^ obtained from page 148 
Side argument : Approximate difference of height (z). 



Approximat 




lOOOO^. 






Difference 
of Height. 


































Z. 


25 


50 


75 


100 


125 


150 


175 200 


225 


250 


275 


300 




m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 




m. 


m. 


m. 




100 


0.3 


0.5 


0.8 


1.0 


1-3 


1-5 


1.8 


2.0 


2-3 


2.5 


2.8 


3-0 




200 


0.5 


1.0 


1-5 


2.0 


2.5 


3-0 


3-5 


4.0 


4-5 


5-0 


5-5 


6.0 




300 


0.8 


1-5 


2.3 


3-0 


3-8 


4.5 


5-3 


6.0 


6.8 


7-5 


8.3 


9.0 




400 


I.O 


2.0 


3-0 


4.0 


5-0 


6.0 


7.0 


8.0 


9.0 


lO.O 


II.O 


12.0 




500 


1-3 


2.5 


3.8 


5-0 


6.3 


7.5 


8.8 


10. 


II-3 


12.5 


13-8 


15.0 




600 


1-5 


3-0 


4-5 


6.0 


7-5 


9.0 


10.5 


12.0 


13-5 


15-0 


16.5 


18.0 




700 


1.8 


3-5 


5-3 


7.0 


8.8 


10.5 


12.3 


14.0 


15-8 


17-5 


19-3 


21.0 




800 


2.0 


4.0 


6.0 


8.0 


lO.O 


12.0 


14.0 


16.0 


18.0 


20.0 


22.0 


24.0 




900 


2-3 


4-5 


6.8 


9.0 


II-3 


13-5 


15.8 


18.0 


20.3 


22.5 


24.8 


27,0 




1000 


2.5 


5-0 


7.5 


lO.O 


12.5 


15.0 


17-5 


20.0 


22.5 


25.0 


27-5 


30.0 




1 100 


2.8 


5-5 


8.3 


II. 


13.8 


16.5 


19-3 


22.0 


24.8 


27-5 


30-3 


33-0 




1200 


3-0 


6.0 


9.0 


12.0 


15-0 


18.0 


21.0 


24.0 


27.0 


30.0 


33-0 


36.0 




1300 


3-3 


6.5 


9.8 


13.0 


16.3 


19-5 


22.8 


26.0 


29-3 


32.5 


35-8 


39-0 




1400 


3-5 


7.0 


10.5 


14.0 


17-5 


21.0 


24-5 


28.0 


31-5 


35.0 


38.5 


42.0 




1500 


3-8 


7-5 


ii-3 


I5-0 


18.8 


22.5 


26.3 


30.0 


33-8 


37-5 


41-3 


45.0 




1600 


4.0 


8.0 


12.0 


16.0 


20.0 


24.0 


28.0 


32.0 


36.0 


40.0 


44.0 


48.0 




1700 


4-3 


8.5 


12.8 


17.0 


21.3 


25-5 


29.8 


34-0 


38.3 


42.5 


46.8 


51.0 




1800 


4.5 


9.0 


13-5 


18.0 


22.5 


27.0 


31-5 


36.0 


40.5 


45-0 


49.5 


54- 




1900 


4.8 


9-5 


14-3 


19.0 


23.8 


28.5 


33-3 


38.0 


42.8 


47-5 


52.3 


57-0 




2000 


5-0 


lO.O 


I5-0 


20.0 


25.0 


30.0 


35.0 


40.0 


45-0 


50.0 


55-0 


60.0 




2100 


5-3 


10.5 


15-8 


21.0 


26.3 


31-5 


36.8 


42,0 


47.3 


52.5 


57-8 


63.0 




2200 


5-5 


II. 


16.5 


22.0 


27.5 


33-0 


38.5 


44.0 


49-5 


55-0 


60.5 


66.0 




2300 


5.8 


II-5 


17-3 


23.0 


28.8 


34.5 


40.3 


46.0 


51.8 


57-5 


63-3 


69.0 




2400 


6.0 


12.0 


18.0 


24.0 


30.0 


36.0 


42.0 


48.0 


54- 


60.0 


66.0 


72.0 




2500 


6.3 


12.5 


18.8 


25.0 


31-3 


37-5 


43-8 


50.0 


56.3 


62.5 


68.8 


75.0 




2600 


6.5 


13.0 


19-5 


26.0 


32.5 


39-0 


45-5 


52.0 


58.5 


65.0 


71-5 


78.0 




2700 


6.8 


13-5 


20.3 


27.0 


33.8 


40.5 


47.3 


54.0 


60.8 


67-5 


74-3 


81.0 




2800 


7.0 


14.0 


21.0 


28.0 


35-0 


42.0 


49.0 


56.0 


63.0 


70.0 


77-0 


84.0 




2900 


7-3 


14-5 


21.8 


29.0 


36.3 


43-5 


50.8 


58.0 


65-3 


72.5 


79.8 


87.0 




3000 


7-5 


15.0 


22.5 


30-0 


37-5 


45-0 


52.5 


60.0 


67.5 


75-0 


82.5 


90.0 




3100 


7.8 


15-5 


23-3 


3I-0 


38.8 


46.5 


54-3 


62.0 


69.8 


77.5 


85.3 


93-0 




3200 


8.0 


16.0 


24.0 


32.0 


40.0 


48.0 


56.0 


64.0 


72.0 


80.0 


88.0 


96.0 




3300 


8.3 


16.5 


24.8 


33-0 


41.3 


49-5 


57.8 


66.0 


74-3 


82.5 


90.8 


99.0 




3400 


8.5 


17.0 


25-5 


34-0 


42.5 


51-0 


59-5 


68.0 


76.5 


85.0 


93-5 


102.0 




3500 


8.8 


17.5 


26.3 


35-0 


43-8 


52.5 


61.3 


70.0 


78.8 


87.5 


96.3 


105.0 




3600 


9.0 


18.0 


27.0 


36.0 


45-0 


54-0 


63.0 


72.0 


81.0 


90.0 


99.0 


108.0 




3700 


9-3 


18.5 


27.8 


37-0 


46.3 


55-5 


64.8 


74.0 


83.3 


92.5 


101.8 


III.O 




3800 


9-5 


19.0 


28.5 


38.0 


47-5 


57.0 


66.5 


76.0 


85.5 


95-0 


104.5 


114.0 




3900 


9.8 


19-5 


29-3 


39-0 


48.8 


58.5 


68.3 


78.0 


87.8 


97-5 


107.3 


117.0 




4000 


lO.O 


20.0 


30.0 


40.0 


50.0 


60.0 


70.0 


80.0 


90.0 


1 00.0 


IIO.O 


120.0 




5000 


12.5 


25.0 


37-5 


50.0 


62.5 


75-0 


87.5 


lOO.O 


112.5 


125.0 


137-5 


150.0 




6000 


I5-0 


30.0 


45- 


60.0 


75-0 


90.0 


105.0 


120 


135-0 


150.0 


165.0 


180.0 




7000 


17.5 


35.0 


52.5 


70.0 


87.5 


105.0 


122.5 


140.0 


157-5 


175-0 


192.5 


210.0 





Smithsonian Table*. 



149 



Table 61 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 



, /o.378i \ 
-■ Vo. 003(3 7/ 



Correction for Humidity: Values of 

Top argument : Values of c 

Side argument : Values of b. Auxiliary to Table 58. 





Air 










VAPOR PRESSURE mm 












Pres- 
sure. 

[ 






















0.5 


1 


2 


3 


4 


5 


6 


7 


8 


9 


10 


20 


30 


mm. 


°c. 


°c. 


°c. 


°c 


°c. 


°c. 


°c. 


°c. 


°c, 


"c. 


°c. 


°c. 


°c. 


780 


0.0 


0.1 


0.1 


0.2 


0-3 


0.3 


0.4 


0-5 


0-5 


0.6 


0.7 


1-3 


2.0 


! 760 


.0 




.1 


.2 


■3 


•3 


•4 


■5 


•5 


.6 


■7 


1.4 


2.0 


740 


.0 




.1 


.2 


■3 


•4 


•4 


•5 


.6 


.0 


•7 


1.4 


2.1 


1 720 


.0 




.1 


.2 


•3 


•4 


■4 ; .5 


.6 


.6 


•7 


1.4 


2.1 


700 


.0 




.2 


• 2 


■3 


•4 


•4 1 .5 


.6 


•7 


•7 


1-5 


2.2 


680 


.0 




.2 


.2 


•3 


•4 


.4 ! .5 


.6 


.7 


.8 


1-5 




660 


.0 




.2 


.2 


•3 


•4 


•5 1 -5 


.6 


•7 


.8 


1.6 




640 


.0 




.2 


.2 


•3 


■4 


•S \ .6 


.b 


•7 


.8 


1.6 




b20 


.0 




.2 


.2 


•3 


•4 -5 


.6 


■7 


.8 


.8 


1-7 




1 600 


.0 




.2 


•3 


•3 


•4 -S 


.6 


■7 


.8 


■9 


1-7 




580 


.0 




.2 


•3 


•4 


•4 -5 


.6 


■7 


.8 


•9 






Sf)o 


.0 




.2 


•3 


■4 


.5 -6 


.5 


■ 7 


.8 


•9 






S40 


.0 




.2 


•3 


•4 


•5 -6 


•7 


.8 


•g 


I.O 






i5^o 


.0 




.2 


■3 


■4 


.5 .6 


•7 


.8 


•9 








500 


.0 




.2 


•3 


•4 


•5 


.6 


■7 


.8 


■9 








480 






.2 


•3 


•4 


•5 


.6 


.8 












460 






.2 


•3 


•4 


.6 


•7 


.8 












440 






.2 


•4 


•5 


.6 


•7 














420 






.2 


•4 


•5 


.6 


•7 














400 






•3 


•4 


•5 


.6 
















380 






•3 


•4 


•5 


















360 




•^ 


•3 


•4 


.6 


















340 




.2 


.3 


•4 




















320 




.2 


•3 


•5 




















300 




, •' 


•3 






















280 




.2 


•4 






















1 260 




.2 


.4 






















240 


.1 


.2 


•4 






















220 




.2 
























200 




•3 
























180 


.1 


•3 
























160 


.2 


•3 
























140 


.2 


•4 
























120 


.2 


•4 
























100 


•3 


•5 
























80 


•3 


























60 


•4 


























40 


.6 


























20 


1-3 


























ID 


2.6 










1 















Smithsonian Tables. 



150 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 

DYNAMIC MEASURES. 

Correction for Humidity: Values of ^ {'^^ 

rj. VO.OC 

lop argument: Values of e. 
Side argument : Values of b. Auxiliary to Table 58 



Table 61 



00367/ 





Air 












VAPOR PRESSURE mb. 


■ 






Pres- 
sure. 




















0.5 


1 


2 


3 


4 


5 

°c. 

0.2 
.2 
.2 
•3 
•3 


6 


7 


8 


9 


10 


20 


30 


40 




mb. 
1080 

1060 


°c. 

0.0 

.0 


°c. 

0.0 

.0 


°c. 
0.1 


°c. 
0.1 


°c. 
0.2 


°c. 
0-3 


°c. 
0-3 


°c. 
0.4 


°c. 
0.4 


°c. 


°c. 

I.O 


°c. 
1.4 


°c. 
1.9 




1040 
1020 
1000 


.0 
.0 
.0 


.0 
.1 

.1 




.1 

.2 

.2 


.2 
.2 
.2 


•3 
•3 
•3 
•3 


•3 
•3 
•4 
•4 


•4 
•4 
•4 
•4 


•4 
•4 
•5 
•5 


•5 
•5 
•5 
•5 


I.O 

1.0 

I.O 
I.O 


1-5 
1-5 
1-5 
1-5 


1. 9 
2.0 
2.0 
2.1 




980 

960 


.0 
.0 


.1 
.1 




.2 
.2 


.2 
.2 


•3 

•3 


•3 
•3 


•4 
•4 


•4 
•4 


•5 
•5 


•5 

.5 


I.I 
I.I 


1.6 
1.6 


2.1 
2.1 




940 


.0 


.1 




.2 


.2 


•3 


•3 


•4 


•4 


•S 


•5 


I.I 


1.6 


2.2 




920 


.0 


.1 




.2 


.2 


•3 


•3 


•4 


•4 


•5 


.6 


I.I 


1-7 
1-7 


2 2 






.0 


.1 




.2 


.2 


•3 


•3 


•4 


•5 


•5 


.6 


I.I 


2-3 




880 

860 
840 
820 
800 


.0 
.0 
.0 


.1 
.1 
.1 




.2 
.2 
.2 


.2 
.2 
.2 


•3 
•3 
•3 


•4 
•4 
•4 


■4 
•4 
•4 


•S 
•5 


•5 
•5 
.6 


.6 
.6 
.6 


1.2 
1.2 
1.2 


1.8 
1.8 
1.8 


2-3 

2.4 




.0 
.0 


.1 

.1 




.2 
.2 


■3 
•3 


•3 
•3 


•4 
•4 


•4 
•5 


•5 
•5 


.6 
.6 


.6 
.6 


1-3 

1-3 


1.9 
I.O 






780 


.0 


.1 




.2 


•3 


•3 


•4 


•5 


•S 


.6 


.7 


1-3 


2.0 






760 


.0 


.1 




.2 


■3 


■3 


•4 


•5 


•5 


.6 


.7 


1.4 








740 


.0 


.1 




.2 


•3 


•3 


•4 


•5 


.6 


.6 


.7 


1.4 








720 


.0 


.1 




.2 


•3 


•4 


•4 


•5 


.6 


.6 


.7 


1.4 








700 


.0 


.1 




.2 


•3 


•4 


•4 


•5 


.6 


•7 


•7 


1-5 








680 


.0 


.1 


.2 


.2 


■3 


•4 


•5 


.5 


.6 


.7 


.8 










660 


.0 


.1 


.2 


.2 


■3 


•4 


.i; 


.5 


.6 


.7 


.8 










640 


.0 


.1 


.2 


.2 


•3 


•4 


■5 


.6 


.6 


.7 


.8 










620 


.0 


.1 


.2 


.2 


•3 


•4 


.5 


.6 


- 


.7 












600 


.0 


.1 


.2 


•3 


•3 


.4 


•5 


.6 


•7 


.8 












580 


.0 


.1 


.2 


•3 


■4 


•4 


•5 


.6 


.7 


.8 












560 


.0 


.1 


.2 


•3 


•4 


•5 


.6 


.6 


.7 














540 


.0 


.1 


.2 


•3 


•4 


•5 


.6 


• 7 


.8 












520 


.0 


.1 


.2 


•3 


•4 


•5 


.6 


• 7 


.8 










500 


.1 


.1 


.2 


•3 


•4 


■5 


.6 


•7 












480 

460 
440 


.1 


.1 


.2 


•3 


■4 


•5 


.6 


.8 






Air 


VAPOB 


. PRESSURE 




.1 
.1 


.1 

.1 


.2 
.2 


■3 
•4 


•4 
.5 


.6 


•7 
•7 
•7 








Pres- 
sure. 
















420 
400 


.1 


.1 


.2 


■4 


•5 


.6 
.6 










0.5 


1 


2 








•3 


■4 





.8 








































mb. 


°c. 




°c 




380 


.1 


.1 


•3 


■4 


•5 


•7 










180 


.1 


•3 
.3 


.6 




360 


.1 


.1 


•3 


•4 


.6 


■7 










160 


.2 


.6 




340 


.1 


.2 


•3 


■5 


.6 


.8 










140 


.2 


.4 






320 


.1 i 


•2 


•3 


■5 


.6 












120 


.2 


•4 






300 


.1 1 


.2 


•3 


•5 


•7 












100 


•3 


■5 






280 


.1 


.2 


•4 ■ 


.6 


•7 












80 


^ 








260 


.1 


.2 


•4 i 


.6 














60 


•4 








240 


.1 


.2 


■4 


.6 














40 


.0 ! 








220 


.1 


.2 


■5 ! 


•7 














20 


1-3 






200 1 


.1 


•3 


•5 


1 












"1 


2.6 







Smithsonian Tables. 



i=;i 



Table 62. 

DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 
Correction for Gravity and Weight of Mercury : 2 (0.002640 cos 2<i) — 0.000007 cos" 2 (/> + 0.00244). 

















LATITUDE 


[<P) 
















Approximate 
difference of 






















































1 




1 












Height. Z. 


0° 


5° 


10° 

tn. 


15° 


20° 


25° 


30° 


35° 


40= 


45° 


50= 


55° 


60° 


65° 


70° 


75° 




Meters. 


m. 


rti. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


m. 


tn. 


m. 


m. 


m. 


m. 




100 


I 


I 














































200 


I 


I 


I 


I 


I 


I 


I 


I 


I 

























300 


2 


2 


I 


I 


I 


I 


I 


I 


I 


I 


I 



















400 


2 


2 


2 


2 


2 


2 


2 


I 


I 


I 


I 


I 
















500 


3 


3 


2 


2 


2 


2 


2 


2 


I 


I 


I 

















600 


3 


3 


3 


3 


3 


2 


2 


2 


2 


I 


I 

















700 


4 


4 


3 


3 


3 


■3 


3 


2 


2 


2 


I 
















800 


4 


4 


4 


4 


4 


3 


3 


3 


2 


2 


2 
















QOO 


5 


5 


4 


4 


4 


4 


3 


3 


3 


2 


2 






I 










1000 


S 


5 


5 


5 


4 


4 


4 


3 


3 


2 


2 


2 














1 100 


6 


6 


S 


S 


S 


S 


4 


4 


3 


3 


2 


2 














1200 


6 


6 


6 


6 


S 


s 


S 


4 


3 


3 


2 


2 














1300 


7 


7 


6 


6 


6 


5 


S 


4 


4 


3 


3 


2 













1400 


7 


7 


7 


7 


6 


6 


s 


S 


4 


3 


3 


2 


2 











1500 


8 


8 


7 


7 


7 


6 


6 


S 


4 


4 


3 


2 


2 











1600 


8 


8 


8 


8 


7 


7 


6 


s 


S 


4 


3 


2 


2 











1700 


9 


9 


8 


8 


8 


7 


6 


6 


S 


4 


3 


3 


2 











1800 


9 


9 


9 


8 


8 


7 


7 


6 


S 


4 


4 


3 


2 











1900 


10 


10 


9 


9 


8 


8 


7 


6 


S 


S 


4 


3 


2 











2000 


10 


10 


10 


9 


9 


8 


8 


7 


6 


S 


4 


3 


2 


I 









2100 


II 


II 


10 


10 


9 


9 


8 


7 


6 


5 


4 


3 


2 


2 









2200 


II 


II 


II 


10 


10 


9 


8 


7 


6 


S 


4 


3 


2 


2 









2300 


12 


12 


II 


II 


10 


9 


9 


8 


7 


6 


S 


4 


3 


2 









2400 


12 


12 


12 


II 


II 


10 


9 


8 


7 


6 


5 


4 


3 


2 









2500 


13 


13 


12 


12 


II 


10 


9 


8 


7 


6 


S 


4 


3 


2 









2600 


13 


13 


13 


12 


12 


II 


10 


9 


8 


6 


S 


4 


3 


2 









2700 


14 


14 


13 


13 


12 


II 


10 


9 


8 


7 


S 


4 


3 


2 









2800 


14 


14 


14 


13 


12 


12 


II 


9 


8 


7 


6 


4 


3 


2 









2900 


IS 


IS 


14 


14 


13 


12 


II 


10 


8 


7 


6 


4 


3 


2 









3000 


IS 


IS 


IS 


14 


13 


12 


II 


10 


9 


7 


6 


5 


3 


2 









3100 


16 


16 


15 


IS 


14 


13 


12 


10 


9 


8 


6 


S 


3 


2 









3200 


16 


16 


16 


15 


14 


13 


12 


II 


9 


8 


6 


S 


4 


2 









3300 


17 


17 


16 


16 


IS 


14 


12 


II 


10 


8 


7 


S 


4 


2 









3400 


17 


17 


17 


16 


IS 


14 


13 


II 


10 


8 


7 


S 


4 


2 









3500 


18 


18 


17 


17 


16 


14 


13 


12 


10 


9 


7 


5 


4 


3 








3600 


18 


18 


18 


17 


16 


IS 


14 


12 


10 


9 


7 


S 


4 


3 








3700 


19 


19 


18 


17 


16 


IS 


14 


12 


II 


9 


7 


6 


4 


3 


2 






3800 


19 


19 


19 


18 


17 


16 


14 


13 


II 


9 


8 


6 


4 


3 


2 






3900 


20 


20 


19 


18 


17 


16 


IS 


13 


II 


9 


8 


6 


4 


3 


2 






4000 


20 


20 


20 


19 


18 


17 


IS 


13 


12 


10 


8 


6 


4 


3 


2 






4500 


-'3 


23 


22 


21 


20 


19 


17 


IS 


13 


II 


9 


7 


S 


3 


2 






5000 


25 


2S 


25 


24 


22 


21 


19 


17 


14 


12 


10 


8 


6 


4 


2 






5SOO 


28 


28 


27 


26 


24 


23 


21 


18 


16 


13 


II 


8 


6 


4 


2 






6000 


30 


30 


29 


28 


27 


2S 


23 


20 


17 


15 


12 


9 


7 


4 


2 






6500 


1 

2,i 


3i 


32 


31 


29 


27 


24 


22 


19 


16 


13 


10 


7 


5 


3 






7000 


35 


3S 


34 


33 


31 


29 


26 


23 


20 


17 


14 


II 


8 


5 


3 







Smithsonian Tables. 



1 5-' 



Table 63. 
DETERMINATION OF HEIGHTS BY THE BAROMETER. 

METRIC MEASURES. 

z (z4- 2 h \ 
Correction for the variation of gravity witli altitude: ^ — ^ 



Approxi- 
mate 








HEIGHT OF LOWER 


STATION IN 


METERS (ho). 








difference 

of height. 

Z. 



































200 


400 


600 


800 


1000 


1200 


1400 


1600 


1800 


2000 


2500 


3000 


4000 




meters 


m. 


m. 


m. 


m. 


m. 


m. 


111. 


m. 


m. 


ra. 


m. 


m. 


m. 


m. 




200 














































300 














































400 









































I 




500 












































600 











































7CX) 










































800 








































900 























I 
















1000 


































I 




IIOO 

































2 




1200 
































2 




1300 































2 




1400 





























2 


2 




1500 






















J 




2 


2 


2 




1600 







-. 


















2 


2 


2 




1700 





I 


















2 


2 


2 


3 




1800 




I 
















2 


2 


2 


2 


3 




19CX) 




I 














2 


2 


2 


2 


■2 


3 




2000 












'I 




2 


2 


2 


2 


2 


3 


3 




2100 






T 










2 


2 


2 


2 


2 


3 


3 




2200 














2 


2 


2 


2 


2 


2 


3 


4 




2300 












2 


2 


2 


2 


2 


2 


3 


3 


4 




2400 










2 


2 


2 


2 


2 


2 


2 


3 


3 


4 




2500 








I 


2 


2 


2 


2 


2 


2 


3 


3 


3 


4 




2600 








2 


2 


2 


2 


2 


2 


3 


3 


3 


4 


4 




2700 








2 


2 


2 


2 


2 


3 


3 


3 


3 


4 


5 




2800 






2 


2 


2 


2 


2 


2 


3 


3 


3 


3 


4 


5 




2900 




2 


2 


2 


2 


2 


2 


3 


3 


3 


3 


4 


4 


5 




3000 


I 


2 


2 


2 


2 


2 


3 


3 


3 


3 


3 


4 


4 


5 




3100 


2 


2 


2 


2 


2 


2 


3 


3 


3 


3 


3 


4 


4 


5 




3200 


2 


2 


2 


2 


2 


3 


3 


3 


3 


3 


4 


4 


5 


6 




3300 


2 


2 


2 


2 


3 


3 


3 


3 


3 


4 


4 


4 


5 


6 




3400 


2 


2 


2 


2 


3 


3 


3 


3 


4 


4 


4 


4 


5 


6 




3500 


2 


2 


2 


3 


3 


3 


3 


3 


4 


4 


4 


5 


5 


6 




3600 


2 


2 


2 


3 


3 


3 


3 


4 


4 


4 


4 


5 


5 


7 




3700 


2 


2 


3 


3 


3 


3 


4 


4 


4 


4 


4 


5 


6 


7 




3800 


2 


3 


3 


3 


3 


3 


4 


4 


4 


4 


5 


5 


6 


7 




3900 


2 


3 


3 


3 


3 


4 


4 


4 


4 


5 


5 


5 


6 


7 




4000 


3 


3 


3 


3 


4 


4 


4 


4 


5 


5 


5 


6 


6 


8 




4500 


3 


3 


4 


4 


4 


5 


5 


5 


5 


6 


6 


7 


7 


9 




5000 


4 


4 


5 


5 


5 


5 


6 


6 


6 


7 


7 


8 


9 


10 




5500 


5 


5 


.5 


6 


6 


6 


7 


7 


8 


8 


8 


9 


10 


12 




6000 


6 


6 


6 


7 


7 


8 


8 


8 


9 


9 


9 


10 


II 


13 




1 6500 


7 


7 


7 


8 


8 


9 


9 


9 


10 


10 


II 


12 


13 


15 




7000 


8 


8 


9 


9 


9 


10 


10 


II 


II 


12 


12 


13 


14 


16 





6m'thsonian Tables. 



153 



Table 64. 



HEIGHTS REDUCED FROM METERS TO DYNAMIC METERS, THE 
ACCELERATION OF GRAVITY AT SEA LEVEL BEING 9.80. 



Height 
(meters) 





100 


200 


300 


400 


500 


600 


700 


800 


900 


29000 


28290 


28387 


28484 


28582 


28679 


28776 


28873 


28970 


29067 


29164 


28000 


27319 


27416 


27513 


27610 


27708 


27805 


27902 


27999 


28096 


28193 


27000 


26347 


26445 


26542 


26639 


26736 


26833 


26930 


27028 


27125 


27222 


26000 


25376 


25473 


25570 


25667 


25764 


25862 


25959 


26056 


26153 


26250 


25000 


24404 


24501 


24598 


24695 


24792 


24890 


24987 


25084 


25181 


25279 


24000 


23431 


23528 


23626 


23723 


23820 


23917 


24015 


241 12 


24209 


24306 


23000 


22458 


22556 


22653 


22750 


22847 


22945 


23042 


23139 


23237 


23334 


22000 


21485 


21583 


21680 


21777 


21875 


21972 


22069 


22166 


22264 


22361 


21000 


20512 


20609 


20707 


20804 


20901 


20999 


21096 


21193 


21291 


21388 


20000 


19538 


19636 


19733 


19830 


19928 


20025 


20122 


20220 


20317 


20415 


19000 


18564 


18662 


18759 


18856 


18954 


1 905 1 


19149 


19246 


19344 


1 944 1 


18000 


17590 


17687 


17785 


17882 


17980 


18077 


18175 


18272 


18369 


18467 


17000 


16615 


I67I3 


16810 


16908 


17005 


17103 


17200 


17298 


17395 


17493 


16000 


15640 


15738 


15835 


15933 


16030 


16128 


16225 


16323 


16420 


16518 


15000 


14665 


14763 


14860 


14958 


15055 


15153 


15250 


15348 


15446 


15543 


14000 


13690 


13787 


13885 


13982 


14080 


14178 


14275 


14373 


14470 


14568 


13000 


12714 


I28II 


12909 


13007 


13104 


13202 


13299 


13397 


13495 


13592 


12000 


1 1 738 


II 835 


1 1933 


1 203 1 


12128 


12226 


12323 


1 242 1 


12519 


12616 


1 1 000 


10761 


10859 


10957 


1 1 054 


1 1 152 


11250 


1 1347 


1 1445 


1 1 543 


1 1 640 


1 0000 


9785 


9882 


9980 


10078 


10175 


10273 


10371 


10468 


10566 


10664 


9000 


8807 


8905 


9003 


9101 


9198 


9296 


9394 


9492 


9589 


9687 


8000 


7830 


7928 


8026 


8123 


8221 


8319 


8417 


8514 


8612 


8710 


7000 


6852 


6950 


7048 


7146 


7244 


7341 


7439 


7537 


7635 


7732 


6000 


5874 


5972 


6070 


6168 


6266 


6363 


6461 


6559 


6657 


6755 


5000 


4896 


4994 


5092 


5190 


5287 


5385 


5483 


5581 


5679 


5777 


4000 


3918 


4015 


4113 


42 1 1 


4309 


4407 


4505 


4603 


4700 


4798 


3000 


2939 


3037 


3134 


3232 


3330 


3428 


3526 


3624 


3722 


3820 


2000 


1959 


2057 


2155 


2253 


2351 


2449 


2547 


2645 


2743 


2841 


1000 


980 


1078 


1176 


1274 


1372 


1470 


1568 


1666 


1763 


1861 








98 


196 


294 


392 


490 


588 


686 


784 


882 







100 


200 


300 


400 


500 


600 


700 


800 


900 








P 


ROPORTIONALIT 


V Tabli 










Meiers 





1 


2 


3 


4 


5 


6 


7 


8 


9 


90 


88 


89 


90 


91 


92 


93 


94 


95 


96 


97 


80 


78 


79 


80 


81 


82 


83 


84 


85 


86 


87 


70 


69 


70 


71 


72 


73 


74 


74 


75 


76 


77 


60 


59 


60 


61 


62 


63 


64 


65 


66 


67 


68 


50 


49 


50 


51 


52 


53 


54 


55 


56 


57 


58 


40 


39 


40 


41 


42 


43 


44 


45 


46 


47 


48 


30 


29 


30 


31 


32 


33 


34 


35 


36 


37 


38 


20 


20 


21 


22 


23 


24 


24 


25 


26 


27 


28 


10 


10 


II 


12 


13 


14 


15 


16 


17 


18 


19 








I 


2 


3 


4 


5 


6 


7 


8 


9 







1 


2 


3 


4 


5 


6 


7 


8 


9 



Smithsonian Tables 



154 



Table 65. 

CORRECTIONS TO TABLE 64 FOR VALUES OF THE ACCELERATION OF 
GRAVITY AT SEA LEVEL DIFFERENT FROM 9.80. 







Acceleration of gravity at sea level 






Height 


















(meters) 






















9.76 


9.77 


9.78 


9.79 


9.80 


9.81 


9.82 


9.83 


9.84 


29000 


— 116 


-87 


-58 


—29 





29 


58 


87 


116 


28000 


— 112 


-84 


-56 


—28 





28 


56 


84 


112 


27000 


—108 


—81 


—54 


—27 





^1 


54 


81 


108 


26000 


— 104 


-78 


—52 


—26 





26 


52 


78 


104 


25000 


— 100 


-75 


—50 


—25 





25 


50 


75 


100 


24000 


- 96 


—72 


-48 


—24 





24 


48 


72 


96 


23000 


— 92 


-69 


-46 


—23 





23 


46 


69 


92 


22000 


— 88 


—66 


—44 


— 22 





22 


44 


66 


88 


21000 


- 84 


-63 


—42 


— 21 





21 


42 


63 


84 


20000 


— 80 


—60 


—40 


— 20 





20 


40 


60 


80 


19000 


- 76 


—57 


-38 


—19 





19 


38 


57 


76 


18000 


— 1^ 


—54 


-36 


—18 





18 


36 


54 


72 


17000 


— 68 


—51 


—34 


—17 





17 


34 


51 


68 


16000 


- 64 


-48 


—32 


—16 





16 


2>2 


48 


64 


15000 


— 60 


-45 


—30 


—15 





15 


30 


45 


60 


14000 


- 56 


—42 


—28 


— 14 





14 


28 


42 


56 


13000 


— 52 


—39 


—26 


—13 





13 


26 


39 


52 


12000 


-48 


-36 


—24 


— 12 





12 


24 


36 


48 


1 1 000 


— 44 


—33 


— 22 


— II 





II 


22 


33 


44 


1 0000 


— 40 


—30 


— 20 


— 10 





10 


20 


30 


40 


9000 


- 36 


—27 


—18 


— 9 





9 


18 


27 


36 


8000 


— 32 


—24 


— 16 


— 8 





8 


16 


24 


32 


7000 


— 28 


— 21 


— 14 


— 7 





7 


14 


21 


28 


6000 


— 24 


— 18 


— 12 


— 6 





6 


12 


18 


24 


5000 


— 20 


—15 


— 10 


— 5 





5 


10 


15 


20 


4000 


— 16 


— 12 


— 8 


— 4 





4 


8 


12 


16 


3000 


— 12 


— 9 


— 6 


— 3 





3 


6 


9 


12 


2000 


— 8 


— 6 


— 4 


— 2 





2 


4 


6 


8 


1000 


— 4 


— 3 


— 2 


— I 





I 


2 


3 


4 


































9.76 


9.77 


9.78 


9.79 


9.80 


9.81 


9.82 


9.83 


9.84 



Table 66. 

NORMAL VALUE OF THE ACCELERATION OF GRAVITY AT SEA LEVEL, 

Ga, M/SEC.2 



Latitude 


0° 


1° 


2° 


3° 


4° 


5° 


6° 


7° 


8° 


9° 


(degrees) 






















80° 


9.8306 


9.8309 


9.8312 


9-8314 


9.8316 


9.8318 


9-8319 


9.8320 


9.8321 


9-8322 


70° 


9.8261 


9.8266 


9.8272 


9-8277 


9.8282 


9.8287 


9.8291 


9.8295 


9.8299 


9-8303 


60° 


9.8192 


9.8200 


9.8207 


9.8214 


9.8222 


9.8229 


9.8236 


9.8242 


9.8249 


9-8255 


50° 


9.8107 


9.8116 


9.8125 


9.8134 


9.8142 


9-8151 


9-8159 


9.8168 


9.8176 


9.8184 


40° 


9.8017 


9.8026 


9-8035 


9.8044 


9-8053 


9.8062 


9.8071 


9.8080 


9.8089 


9.8098 


30° 


9-7933 


97941 


9-794919-7957 


9-7965 9-7974 


9.7982 


9.7991 


9.8000 


9.8008 


20° 


9.7864 


9.7870 


9.7876I9.7883 


9.78899.7896 


9-790319-79IO 


9.7918 


9-7925 


10° 


9.7819 


97823 


9.782619.7830 


9.78349.7838 


9.784319-7848 


9-7853 


9-7858 


0° 


9.7804 9.7804 9.7804 9.7805 9.7806 9.7808 


9.7810 9. 78129. 7814 


9.7816 



Smithsonian Tables 
16 



-^^S 



Table 67. 

HEIGHTS REDUCED FROM DYNAMIC METERS TO GEOMETRIC METERS, 
THE ACCELERATION OF GRAVITY AT SEA LEVEL BEING 9.80. 



Height 






















(dynamic 





100 


200 


300 


400 


500 


600 


700 


800 


900 


meters) 






















29000 


29729 


29832 


29935 


30038 


30141 


30244 


30347 


30451 


30554 


30657 


28000 


28700 


28803 


28906 


29009 


29112 


29215 


29318 


29420 


29523 


29626 


27000 


27670 


^in2> 


27876 


27979 


28082 


28185 


28288 


28391 


28494 


28597 


26000 


26641 


26744 


26847 


26950 


27053 


27156 


27259 


27362 


27464 


27567 


25000 


25612 


25715 


25818 


25921 


26024 


26127 


26230 


26333 


26435 


26538 


24000 


24584 


24687 


24790 


24893 


24995 


25098 


25201 


25304 


25407 


25510 


23000 


23556 


23659 


23762 


23864 


23967 


24070 


24173 


24276 


24378 


24481 


22000 


22528 


22631 


22734 


22836 


22939 


23042 


23145 


23248 


23350 


23453 


21000 


21501 


21603 


21706 


21809 


21912 


22014 


22117 


22220 


22323 


22425 


20000 


20474 


20576 


20679 


20782 


20884 


20987 


21090 


21193 


21295 


21398 


19000 


19447 


19549 


19652 


19755 


19858 


19960 


20063 


20166 


20268 


20371 


18000 


18420 


18523 


18626 


18728 


1 883 1 


18934 


19036 


19139 


19242 


19344 


17000 


17394 


17497 


17599 


17702 


17805 


17907 


18010 


18112 


18215 


18318 


16000 


16368 


1 647 1 


16574 


16676 


16779 


1 688 1 


16984 


17086 


17189 


17292 


15000 


15343 


15445 


15548 


1 565 1 


15753 


15856 


15958 


16061 


16163 


16266 


14000 


I43I8 


14420 


14523 


14625 


14728 


14830 


14933 


15035 


15138 


15240 


13000 


13293 


13395 


13498 


13600 


13703 


13805 


13908 


1 4010 


14113 


14215 


12000 


1.2268 


12371 


12473 


12576 


12678 


12781 


12883 


12986 


13088 


13190 


1 1 000 


1 1 244 


1 1347 


1 1449 


1 1 552 


11654 


1 1 756 


1 1 859 


11961 


12064 


12166 


1 0000 


10220 


10323 


10425 


10528 


10630 


10732 


10835 


10937 


1 1040 


11142 


9000 


9197 


9299 


9402 


9504 


9606 


9709 


981 1 


9913 


10016 


10118 


8000 


8174 


8276 


8378 


8481 


8583 


8685 


8788 


8890 


8992 


9095 


7000 


7I5I 


7253 


7355 


7458 


7560 


7662 


7765 


7867 


7969 


8071 


6000 


6128 


6231 


6333 


6435 


6537 


6640 


6742 


6844 


6946 


7049 


5000 


5106 


5208 


5311 


5413 


5515 


5617 


5719 


5822 


5924 


6026 


4000 


4084 


4186 


4289 


4391 


4493 


4595 


4697 


4800 


4902 


5004 


3000 


3063 


3165 


3267 


3369 


3471 


3573 


3676 


3778 


3880 


3982 


2000 


2042 


2144 


2246 


2348 


2450 


2552 


2654 


2756 


2858 


2961 


1000 


I02I 


1123 


1225 


1327 


1429 


1531 


1633 


1735 


1837 


1939 








102 


204 


306 


408 


510 


612 


714 


816 


919 







100 


200 


300 


400 


500 


600 


700 


800 


900 








Proportionality 


Table 










Meters 





1 


2 


3 


4 


5 


6 


7 


8 


9 


90 


92 


93 


94 


95 


96 


97 


98 


99 


100 


lOI 


80 


82 


83 


84 


85 


86 


87 


88 


89 


90 


91 


70 


71 


72 


73 


74 


76 


11 


78 


79 


80 


81 


60 


61 


62 


63 


64 


65 


66 


67 


68 


69 


70 


50 


51 


52 


53 


54 


55 


56 


57 


58 


59 


60 


40 


41 


42 


43 


44 


45 


46 


47 


48 


49 


50 


30 


31 


32 


33 


34 


35 


36 


37 


38 


39 


40 


20 


20 


21 


22 


23 


24 


26 


21 


28 


29 


30 


10 


10 


II 


12 


13 


14 


15 


16 


11 


18 


19 








I 


2 


3 


4 


5 


6 


1 


8 


9 







1 


2 


3 


4 


5 


6 


7 


8 


9 



Smithsonian Tables 



156 



Table 68. 

CORRECTIONS TO TABLE 67 FOR VALUES OF THE ACCELERATION OF 
GRAVITY AT SEA LEVEL DIFFERENT FROM 9.80. 



Height 






Acceleration of gravity at sea level 






(dynamic 
meters) 




















9.76 


9.77 


9.78 


9.79 


9.80 


9.81 


9.82 


9.83 


9.84 


29000 


121 


91 


60 


' 30 





—30 


—60 


—91 


— 121 


28000 


117 


88 


58 


29 





—29 


-58 


—88 


—117 


27000 


113 


84 


56 


28 





—28 


-56 


-84 


—113 


26000 


108 


81 


54 


27 





—27 


—54 


—81 


—108 


25000 


104 


78 


52 


26 





—26 


—52 


-78 


—104 


24000 


100 


75 


50 


25 





—25 


—50 


—75 


— 100 


23000 


96 


72 


48 


24 





—24 


-48 


—72 


- 96 


22000 


92 


69 


46 


23 





—23 


-46 


-69 


— 92 


21000 


87 


66 


44 


22 





— 22 


—44 


—66 


— 87 


20000 


83 


62 


42 


21 





■ — 21 


—42 


—62 


- 83 


19000 


79 


59 


40 


20 





— 20 


-40 


—59 


— 79 


18000 


75 


56 


37 


19 





—19 


—37 


-56 


— 75 


17000 


71 


53 


35 


18 





—18 


—35 


—53 


— 71 


16000 


67 


50 


33 


17 





—17 


—33 


—50 


- 67 


15000 


62 


47 


31 


16 





—16 


—31 


—47 


— 62 


14000 


58 


44 


29 


15 





—15 


—29 


—44 


- 58 


13000 


54 


41 


27 


14 





— 14 


—27 


—41 


— 54 


12000 


50 


37 


25 


13 





— 13 


—25 


—37 


— 50 


1 1000 


46 


34 


23 


II 





— 1 1 


—23 


—34 


-46 


1 0000 


42 


31 


21 


10 





— 10 


— 21 


—31 


— 42 


9000 


37 


28 


19 


9 





— 9 


— 19 


—28 


— 37 


8000 


33 


25 


17 


8 





— 8 


— 17 


—25 


— 33 


7000 


29 


22 


15 


7 





— 7 


—15 


— 22 


— 29 


6000 


25 


19 


12 


6 





— 6 


— 12 


—19 


— 25 


5000 


21 


16 


10 


5 





— 5 


— 10 


—16 


— 21 


4000 


17 


12 


8 


4 





— 4 


— 8 


— 12 


— 17 


3000 


13 


9 


6 


3 





— 3 


— 6 


— 9 


— 13 


2000 


8 


6 


4 


2 





— 2 


— 4 


— 6 


— 8 


1000 


4 


3 


2 


I 





— I 


— 2 


— 3 


— 4 


































9.76 


9.77 


9.78 


9.79 


9.80 


9.81 


9.82 


9.83 


9.84 



1 


2 


3 


4 


5 


1614 


1633 


14 


+ 2 


1649 


2804 


2858 


4 


+ 3 


2865 


4704 


4800 


4 


+ 6 


4810 


12140 


12371 


41 


+ 16 


12428 



Examples to tables 67 and 68. 

Column 



1. Heights above sea level given in dynamic 

meters. 

2. \'alues of table 67 for the dynamic heights, 

1600, 2800, 4700, 12100. 

3. Values of proportionality table for dynamic 

heights 14, 4, 4, 40. 

4. Corrections from table 68 for g = 9.7873 at 

sea level and for the heights of column 1. 

5. Sum of numbers in columns 2, 3 and 4, giving 

the geometrical heights corresponding to the 
dynamic heights of column 1. 



Examples to tables 64 and 65. 



1 


2 


3 


4 


5 


1649 


1568 


48 


— 2 


1614 


2865 


2743 


64 


— 3 


2804 


4810 


4700 


10 


— 6 


4704 


12428 


12128 


27 


—15 


12140 



Column 

1. Heights above sea level given in meters. 

2. Values of table 64 for the heights 1600, 2800, 

4800, 12400. 

3. Values of proportionality table for the heights 

49, 65, 10. 28. 

4. Corrections from table 65 for g — ^.1%1?> at 

sea level and for the heights of column 1. 

5. Sum of numbers in columns 2, 3 and 4, giving 

the dynamic heights corresponding to the 
geometrical heights of column 1. 



Smithsonian Tables 



157 



Table 69. 

DIFFERENCE OF HEIGHT CORRESPONDING TO A CHANGE OF 
0.1 INCH IN THE BAROMETER. 

ENGLISH MEASURES. 



Baro- 


MEAN TEMPERATURE OF 


THE AIR IN 


FAHRENHEIT DEGREES. 


1 
1 




metric 
Pres- 


















































sure. 


30° 


35° 


40° 


45° 


50° 


55° 


60° 


65° 


70° 


75° 


80° 


85° 




Inches 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 


Feet. 




22.0 


II9.2 


120.5 


121. 8 


123.I 


124.4 


125.8 


127. 1 


128.5 


129.8 


131. 2 


132.5 


133.9 




.2 


I18.2 


II9.4 


120.7 


122.0 


123.3 


124.7 


126.0 


127.3 


128.7 


130.0 


131-3 


132.7 




• 4 


II7.I 


I18.3 


119. 6 


120.9 


122.2 


123.6 


124.9 


126.2 


127.5 


128.8 


130.2 


131. 5 




.6 


1 16. 1 


II7-3 


118.6 


II9.8 


121. 1 


122.5 


123.8 


125. 1 


126.4 


127.7 


129.0 


130.3 




.8 


II5.O 


116.3 


II7-5 


I18.8 


1 20. 1 


121. 4 


122.7 


124.0 


125.3 


126.6 


127.9 


129.2 




23.0 


1 14.0 


II5-3 


116.5 


II7.8 


II9.O 


120.3 


121. 6 


122.9 


124.2 


125.5 


126.8 


128. 1 




.2 


II3.I 


II4-3 


II5-5 


I16.8 


IlS.O 


II9-3 


120.6 


I2I.8 


123. 1 


124.4 


125.7 


127.0 




• 4 


112. 1 


II3-3 


II4-5 


II5-8 


II7.O 


1 18.3 


II9-5 


120.8 


122. 1 


123.3 


124.6 


125.9 




.6 


III. I 


112.3 


II3-5 


114.8 


I16.O 


II7-3 


118.5 


II9.8 


121. 


122.3 


123.5 


124.8 




.8 


1 10. 2 


111.4 


112. 6 


113.8 


II5.I 


1 16.3 


II7-5 


I18.8 


120.0 


121. 3 


122.5 


123.8 




24.0 


109.3 


1 10. 5 


III. 7 


112. 9 


1 14. 1 


II5-3 


116.5 


II7.8 


119. 


120.2 


121. 5 


122.7 




.2 


108.4 


109.5 


1 10. 7 


III. 9 


113. 1 


1 14.4 


115. 6 


II6.8 


II8.O 


1 19. 2 


120.5 


121. 7 




•4 


107.5 


108.6 


109.8 


III.O 


112. 2 


II3-4 


114.6 


II5-9 


II7.I 


II8.3 


II9.5 


120.7 




.6 


106.6 


107.8 


108.9 


no. I 


III. 3 


112.5 


II3-7 


114.9 


1 16. 1 


II7-3 


I1S.5 


IIQ.7 




.8 


105.8 


106.9 


108. 1 


109.2 


1 10. 4 


III. 6 


112. 8 


114.0 


115.2 


116.4 


117. 6 


II8.8 




25.0 


104.9 


106.0 


107.2 


108.3 


109.5 


1 10. 7 


III. 9 


113.1 


114. 2 


115.4 


116.6 


117. 8 




.2 


104. 1 


105.2 


106.3 


107.5 


108.7 


109.8 


III.O 


112. 2 


113.3 


1 14.5 


115. 7 


116.9 




•4 


103.3 


104.4 


105.5 


106.6 


107.8 


109.0 


no. I 


III. 3 


II2.4 


113.6 


114.8 


116.0 




.6 


102.5 


103.6 


104.7 


105.8 


107.0 


108. 1 


109.3 


110.4 


III. 6 


112.7 


113.9 


115.1 




.8 


IOI.7 102.8 


103.9 


105.0 


106. 1 


107.3 


108.4 


109.6 


1 10.7 


III. 9 


113.0 


1 14. 2 




26.0 


100.9 102.0 


103. 1 


104.2 


105.3 


106.4 


107.6 


108.7 


109.9 


III.O 


112.1 


1^3.3 




.2 


100. 1 1 IOI.2 


102.3 


103.4 


104.5 


105.6 


106.8 


107.9 


109.0 


1 10. 1 


III. 3 


112. 4 




•4 


99.4 100.4 


101.5 


102.6 


103.7 


104.8 


106.0 


107. 1 


10S.2 


109.3 


110.4 


III. 6 




.6 


98.6 


99-7 


100.7 


IOI.8 


102.9 


104.0 


105.2 


106.3 


107.4 


108.5 


109.6 


110.7 




.8 


97-9 


98.9 


100. 


lOI.I 


102.2 


103.3 


104.4 


105.5 


106.6 


107.7 


10S.8 


109.9 




27.0 


97.1 


98.2 


99.2 


100.3 


101.4 


102.5 


103.6 


104.7 


105.8 


106.9 


108.0 


109. 1 




.2 


96.4 


97-5 


98.5 


99.6 


100.7 


101.8 


102.8 


103.9 


105.0 


106. 1 


107.2 


108.3 




•4 


95-7 


96.8 


97.8 


98.9 


99-9 


lOI.O 


102. 1 


103.2 


104.2 


105.3 


106.4 


107.5 




.6 


95-0 


96.1 


97.1 


98.1 


99.2 


100.3 


101.3 


102.4 


103.5 


104.6 


105.6 


106.7 




.8 


94-3 


95-4 


96.4 


97-4 


98.5 


99-6 


100.6 


101.7 


102.7 


103.8 


104.9 


105.9 




28.0 


93-7 


94-7 


95-7 


96.7 


97.S 


98.8 


99-9 


lOI.O 


102.0 


103. 1 


104. 1 


105.2 




.2 


93-0 


94.0 


95 -o 


96.1 


97.1 


98.1 


99.2 


100.2 


101.3 


102.3 


103.4 


104.4 




•4 


92.4 


93-4 


94-4 


95-4 


96.4 


97-5 


98.5 


99.5 


100.6 


IOI.6 


102.7 


103.7 




.6 


91.7 


92.7 


93-7 


94-7 


95-7 


96.8 


97.8 


98.8 


99.9 


100.9 


101.9 


103.0 




.8 


91. 1 


92.1 


93-1 


94.1 


95-1 


96.1 


97.1 


98.2 


99.2 


100.2 


101.2 


102.3 




29.0 


90.4 


91.4 


92.4 


93-4 


94-4 


95-4 


96.5 


97-5 


98. 5 


99.5 


100.5 


101.6 




.2 


89.8 


90.8 


91.8 


92.8 


93.8 


94.8 


95-8 


96.8 


97.8 


98.8 


99-9 


100.9 




•4 


89.2 


90.2 


91. 1 


92.1 


93-1 


94.1 


95-1 


96.1 


97.1 


98.2 


99.2 


100.2 




.6 


88.6 


89.6 


90.5 


91-5 


92.5 


93-5 


94.5 


95.5 


96.5 


97.5 


98.5 


99.5 




.8 


88.0 


89.0 


89.9 


90.9 


91.9 


92.9 


93-9 


94-9 


95.8 


96.8 


97.8 


98.8 




30.0 


87.4 


88.4 


89.3 


90.3 


91-3 


92.3 


93-2 


94.2 


95.2 


96.2 


97.2 


98.2 




.2 


86.8 


87.8 


88.7 


89.7 


90.7 


91.7 


92.6 


93-6 


94.6 


95.6 


96.5 


97.5 




• 4 


86.3, 87.2 


88.2 


89.1 


90.1 


91. 1 


92.0 


93-0 


94.0 


94-9 


95.9 


96.9 




.6 


S5.7 


86.7 


87.6 


88.5 


89.5 


90.5 


91.4 


92.4 


93-3 


94.3 


95.3 


96.2 




.8 


85.2 


86.1 


87.0 


88.0 


88.9 


89.9 


90.8 


91.8 


92.7 


93.7 


94.7 


95.6 





Smithsonian Tables. 



158 



Table 70. 
DIFFERENCE OF HEIGHT CORRESPONDING TO A CHANGE OF 
1 MILLIMETER IN THE BAROMETER. 

METRIC MEASURES. 





MEAN TEMPERATURE OF THE 


AIR IN 


CENTIGRADE DEGREES 




Barometric 
Pressure. 












































-2° 


0° 


2° 


4° 


6° 


8° 


10° 


12° 


14° 


I6» 


mm. 


Meters. 


Meters^ 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


760 


10.48 


10.57 


10.65 


10.73 


lO.Sl 


10.89 


10.98 


11.06 


11.15 


11.23 


750 


10.62 


10.71 


10.79 


10.87 


10.95 


11.04 


11.13 


II. 21 


11.30 


11.38 


740 


10.77 


10.85 


10.93 


11.02 


11.10 


11.19 


11.28 


11.36 


11.45 


11.54 


730 


10.91 


11.00 


ii.oS 


II. 17 


11.26 


11-35 


11.43 


11.52 


II. 61 


11.70 


720 


11.06 


II. 15 


11.24 


11.32 


11.42 


II. 51 


11-59 


11.68 


11.77 


11.86 


710 


11.22 


II. 31 


11.40 


11.48 


11.58 


11.67 


11-75 


11.85 


11-94 


12.03 


700 


11.38 


11.47 


11.56 


11.65 


11.74 


11-83 


11.92 


12.02 


12.11 


12.20 


690 


11-55 


II. 6:; 


11.72 


11.82 


11.91 


12.00 


12.09 


12.19 


12.28 


12.38 


680 


11.72 


11.80 


II. 89 


11.99 


12.08 


12.18 


12.27 


12.37 


12.46 


12.56 


670 


11.89 


11.98 


12.07 


12.17 


12.26 


12.36 


12.46 


12.55 


12.65 


12.75 


660 


12.07 


12.16 


12.26 


12.35 


12.45 


12.55 


12.65 


12.74 


12.84 


12.94 


650 


12.26 


12.35 


12.45 


12.54 


12.64 


12.74 


12.84 


12.94 


13.04 


13-14 


640 


12.45 


12.55 


12.64 


12.74 


12.84 


12.94 


13.04 


13-14 


13.24 


13-35 


630 


12.65 


12.75 


12.84 


12.94 


13.04 


13-15 


13-25 


13-35 


13-45 


13-56 


620 


12.85 


12.96 


13-05 


13-15 


13-25 


13-36 


13.46 


13-57 


13-67 


13.7S 


610 


13.06 


13-17 


13.27 


13-37 


13-47 


13-58 


13.68 


13-79 


13-89 


14.01 


600 


13.28 


13-39 


13-49 


13-59 


13.70 


13.80 


13-91 


14.02 


14-13 


14.24 


590 


13-51 


13.62 


13.72 


13-82 


13-93 


1403 


14-15 


14.26 


14-37 


14.48 


580 


13-74 


13-85 


13-96 


14.06 


14.17 


14.28 


14.39 


14-51 


14.62 


14-73 


570 


13-98 


14.09 


14.20 


14-31 


14.42 


14-53 


14.64 


14.76 


14.8S 


14-99 


560 


14-23 


14-34 


14-45 


14-57 


14.68 


14-79 


14.90 


15.02 


15.14 


15-25 




1 


R 


lEAN T] 


EMPERA 


TURE 


F THE 


\IR IN 


CENTIG 


RADE D 


EGREES 




BarofTi'tric 
Pressure. 






















18° 


20" 


22° 


24° 


26° 


28° 


30° 


32° 


34° 


36° 


mm. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


Meters. 


760 


11.32 


II. 41 


11.49 


11.58 


11.66 


11.75 


11.84 


11.92 


12.01 


12.10 


750 


11.47 


11.56 


11.64 


11-73 


11.82 


11.91 


12.00 


12.08 


12.17 


12.26 


740 


11.63 


11.72 


11.80 


11.89 


11.98 


12.07 


12.16 


12.24 


12.33 


12.42 


730 


11.79 


11.88 


11.96 


12.05 


12.15 


12.23 


12.32 


12.41 


12.50 


12.59 


720 


11-95 


12.04 


12.13 


12.22 


12.32 


12.40 


12.49 


12.58 


12.68 


12.77 


710 


12.12 


12.21 


12.30 


12.39 


12.49 


12.58 


12.67 


12.76 


12.86 


12.95 


700 


12.29 


12.39 


12.48 


12.57 


12.67 


12.76 


12.85 


12.94 


13.04 


13-13 


690 


12.47 


12-57 


12.66 


12.75 


12.85 


12.94 


13.04 


13-13 


13-23 


13-32 


680 


12.66 


12.75 


12.85 


12.94 


13.04 


1313 


13-23 


13-32 


13-42 


13-52 


670 


12.85 


12.94 


13.04 


13-14 


13-23 


13-33 


13-43 


13-52 


13.62 


13.72 


660 


13.04 


13-14 


13-24 


13-34 


13-43 


13-53 


13-63 


13-73 


13-S3 


13-93 


650 


13-24 


13-34 


13-44 


13-54 


13-64 


13-74 


13.84 


13-94 


14.04 


14-15 


640 


13-45 


13-55 


13-65 


13-75 


13-85 


13-96 


14.06 


14-15 


14.26 


14-37 


630 


13.66 


13.76 


13-87 


13-97 


14.07 


14.18 


14.28 


14.38 


14.49 


14.60 


620 


13.88 


13-98 


14.09 


14.20 


14.30 


14 41 


14-51 


14.62 


14.72 


14.83 


610 


14.11 


14.21 


14-32 


14-43 


14-54 


14.64 


14-75 


14.86 


14.96 


15-07 


600 


14-35 


14-45 


14.56 


14.67 


14.78 


14.89 


15.00 


15.11 


15.21 


15-32 


590 


14-59 


14.70 


14.81 


14.92 


15-03 


15-14 


15.25 


15-36 


1547 


15-59 


580 


14.84 


14-95 


15-07 


15-17 


15-29 


15.40 


15-52 


15-63 


15.74 


15.86 


570 


15.10 


15.21 


15-33 


15-44 


15-56 


15-67 


15-79 


15-91 


16.02 


16.14 


560 


15-37 


15.48 


15.60 


15-72 


15.84 


15-95 


16.07 


16.19 


16.30 


16.42 



Smithsonian Tables. 



159 



Table 71 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 
Formula of Babinet. 



Bo+B 



900 



— English Measures. 



z = c 

C (in feet) ^ 52494 |^i -f- 

C (in metres') = 16000 i 4 — ^ ' — Metric Measures. 

^ ' L 1000 J 

In which Z =; Difference of height of two stations in feet or metres. 

B^, B = Barometric readings at the lower and upper stations respectively, 
corrected for all sources of instrumental error. 
t^, t = Air temperatures at the lower and upper stations respectively. 



Values of C. 



ENGLISH MEASURES. 



Yz (to + t). 


log C. 


C. 


F. 




Feet. 


10° 


4.69834 


49928 


15 


•70339 


505 1 1 


20 


•70S37 


5^094 


25 


.71330 


51677 


30 


.71S18 


52261 


35 


4.72300 


52S44 


40 


.72777 


53428 


45 


•73248 


5401 1 


50 


•73715 


54595 


55 


•74177 


55178 


60 


4^74633 


55761 


65 


•750S5 


56344 


70 


■75532 


56927 


75 


•75975 


57511 


80 


•76413 


58094 


85 


4.76847 


58677 


90 


.77276 


59260 


95 


.77702 


59844 


100 

1 
1 


.78123 


60427 



METRIC MEASURES. 



.'^(to + t). 


log C. 


C. 


C. 




Metres. 


-10° 


4.18639 


15360 


-8 


.19000 


15488 


-6 


■19357 


I5616 


-4 


.19712 


15744 


— 2 


.20063 


15S72 





4.20412 


16000 


+ 2 


.20758 


16128 


4 


.21101 


16256 


6 


.21442 


16384 


8 


.21780 


16512 


10 


4.22115 


16640 


12 


.22448 


16768 


14 


.22778 


16896 


16 


.23106 


17024 


18 


•23431 


17152 


20 


4-23754 


17280 


22 


•24075 


17408 


24 


■24393 


17536 


26 


.24709 


17664 


28 


.25022 


17792 


30 


4^25334 


17920 


32 


•25643 


18048 


34 


.25950 


18176 


36 


.26255 


1S304 

1 



Smithsonian Tables. 



\(^0 



BAROMETRIC PRESSURE 
OF THE 



S CORRESPONDING 
BOILING POINT OF 

ENGLISH MEASURES. 



Table 72. 
TO THE TEMPERATURE 
WATER. 



Tempera- 
ture. 



F. 
185° 

i86 
187 
188 
189 

190 

191 
192 

193 

194 

195 

196 
197 
198 
199 

200 

201 
202 
203 
204 

205 

206 
207 
208 
209 

210 

211 
212 
213 
214 



.0 



Inches. 

17-075 
17-450 
17.832 
18.221 
18.618 

19.021 

19-431 
19.849 
20.27s 
20.707 

21.148 

21-597 
22.053 
22.517 
22.990 

23.470 
23-959 
24-457 
24.963 
25-478 
26.001 
26.534 
27-075 
27.626 
28.18s 

28.754 

29-333 
29.921 

30.519 
31.127 



.1 



Inches. 
17. 112 

17.488 
17.871 
18.261 
18.658 

19.062 

19-473 
19.892 
20.318 
20.751 

21.192 
21.642 
22.099 
22.564 
23-038 

23-519 
24.009 
24.507 
25.014 
25-530 
26.054 
26.587 
27.130 
27.681 
28.242 

28.812 
29.391 
29.981 
30.580 
31-199 



Inches. 

17.150 
17.526 
17.910 
18.300 
18.698 

19.102 
19-514 
19-934 
20.361 

20.795 
21.237 
21.687 
22.145 
22.611 
23-085 

23-568 
24.058 

24-557 
25-065 
25-582 

26.107 
26.641 
27.184 

27-737 
28.298 

28.869 
29.450 
30.040 
30.640 
31-250 



.3 



Inches. 

17.187 

17-564 
17.948 
18.340 
18.738 

19-143 
19-556 
19.976 
20.404 
20.839 

21.282 

21-733 
22.192 
22.658 
23-133 
23.616 
24.108 
24.608 
25.116 
25-634 
26.160 
26.695 
27.239 
27.793 
28.355 
28.927 
29-508 
30.100 
30.701 



.4 



Inches. 

17.224 
17.602 
17-987 
18.379 
18.778 

19.184 
19-598 
20.019 

20.447 
20.883 

21.326 
21.778 
22.238 
22.706 
23.181 

23-665 
24-157 
24.658 
25.168 
25.686 

26.213 
26.749 

27-294 
27.848 
28.412 

28.985 
29-567 
30-159 
30.761 

31-373 



.5 



Inches. 
17.262 
17.641 
18.026 
18.419 
18.818 

19.225 
19.639 
20.061 
20.490 
20.927 

21.371 
21.824 
22.284 

22.753 
23.229 

23-714 
24.207 
24-709 
25.219 
25-738 
26.266 
26.803 

27-349 
27.904 
28.469 

29.042 
29.626 
30.219 
30.822 
31-435 



.6 



Inches. 
17.300 
17.679 
18.065 
18.458 
18.859 

19.266 
19.681 
20.104 

20.533 
20.971 

21.416 
21.870 
22.331 
22.800 
23.277 

23-763 
24-257 
24-759 
25.271 

25-791 
26.319 
26.857 
27-404 
27.960 
28.526 

29.100 
29-685 
30.279 
30.883 
31-497 



.7 



Inches. 

17-337 
17.717 
18.104 
18.498 
18.899 

19.308 
19.723 
20.146 

20.577 
21.015 

21.461 
21.915 
22.377 
22.847 
23-325 
23.812 

24-307 
24.810 
25.322 
25-843 
26.373 
26.912 
27.460 
28.016 
28.583 

29-158 
29.744 

30-339 
30.944 
31-559 



.8 



Inches. 

17-375 
17-756 
18.143 
18.538 
18.940 

19-349 
19-765 
20.189 
20.620 
21.059 

21.506 
21.961 
22.424 
22.895 
23-374 
23.861 

24-357 
24.861 

25-374 
25.896 

26.426 
26.966 

27-515 
28.073 
28.640 

29.216 
29.803 

30.399 
31-005 
31.621 



Inches. 

17-413 
17-794 
18.182 
18.578 
18.980 

19.390 
19.807 
20.232 
20.664 
21.103 

21-551 
22.007 
22.471 
22.942 
23-422 
23.910 

24-407 
24.912 
25.426 
25-948 
26.480 
27.021 
27-570 
28.129 
28.697 

29-275 
29.862 

30.459 
31.066 
31-683 











METRIC MEASURES. 






Table 73. 


Tempera- 
ture. 


.0 


.1 


.2 


.3 


.4 


.5 .6 


.7 


.8 


.9 


C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


80° 


355-40 


356.84 


358-28 


359-73 


361.19 


362.65 


364.11 


365-58 


367.06 


368.54 


81 


370.03 


371-52 


373-01 


374-51 


376.02 


377-53 


379-05 


380.57 


382.09 383.62 II 


82 


385-16 


386.70 


388.25 


389.80 


391-36 


392-92 


394-49 


396.06 


397-64 


399.22 


83 


400.81 


402.40 


404.00 


405.61 


407.22 


408.83 


410.45 


412.08 


413-71 


415-35 


84 


416.99 


418.64 


420.29 


421.95 


423.61 


425.28 


426.95 


428.64 


430.32 


432.01 


85 


433-71 


435-41 


437-12 


438-83 


440.55 


442.28 


444.01 


445-75 


447.49 


449.24 


86 


450.99 


452.75 


454-51 


456.28 


458.06 


459-84 


461.63 


463.42 


465-22 


467.03 


87 


468.84 


470.66 


472.48 


474-31 


476.14 


477-99 


479-83 


481.68 


483-54 


485.41 


88 


487.28 


489.16 


491.04 


492-93 


494.82 


496.72 


498.63 


500.54 


502.46 


504-39 


89 


506.32 


508.26 


510.20 


512.15 


514.11 


516.07 


518.04 


520.01 


521.99 


523-98 


90 


525.97 


527-97 


529-98 


531-99 


534-01 


536-04 


538-07 


540.11 


542.15 


544.21 


91 


546.26 


548.33 


550.40 


552-48 


554-56 


556-65 


558.7s 


560.85 


562.96 


565.08 


92 


567.20 


569-33 


571-47 


573-61 


575-76 


577-92 


580.08 


582.25 


584-43 


586.61 


93 


588.80 


591.00 


593-20 


595-41 


597-63 


599-86 


602.09 


604-33 


606.57 


608.82 


94 


611.08 


613-35 


615.62 


617.90 


620.19 


622.48 


624.79 


627.09 


629.41 


631-73 


95 


634.06 


636.40 


638.74 


641.09 


643-45 


645-82 


648.19 


650.57 


652.96 


655-35 


96 


657-75 


660.16 


662.58 


665.00 


667.43 


669.87 


672.32 


674-77 


677.23 


679.70 


97 


682.18 


684.66 


687.15 


689.65 


692.15 


694.67 


697.19 


699.71 


702.25 


704.79 


98 


707-35 


709.90 


712.47 


715-04 


717-63 


720.22 


722.81 


725-42 


728.03 


730.65 


90 


733-28 


735-92 


738-56 


741.21 


743-87 


746.54 


749.22 


751-90 


754-59 


757.29 


100 


760.00 


762.72 


765-44 


768.17 


770.91 


773-66 


776.42 


779.18 


781-95 


784-73 



Smithsonian Tables. 



161 



HYGROAIETRICAL TABLES. 



Pressure of aqueous vapor over ice — Eng^lish measures . . . Table 74 

Pressure of aqueous vapor over water — English measures . . Table 75 

Pressure of aqueous vapor over ice — Metric measures . . . Table '/(i 

Pressure of aqueous vapor over water — Metric measures . . Table 'jy 

Pressure of aqueous vapor over ice — Dynainic measures . . Table 78 

Pressure of aqueous vapor over water — Dynamic measures . . Table 79 

Weight of a cubic foot of saturated vapor — Enghsh measures . Table 80 

Weight of a cubic meter of saturated vapor — Metric measures . Table 81 



Table 74. 



PRESSURE OF AQUEOUS VAPOR OVER ICE. 

ENGLISH MEASURES. 



Tempera- 


Vapor 


Tempera- Vapor 


Tempera- 


Vapor 


Tempera- 


Vapor 


Tempera- 


Vapor 


ture. 


Pressure. 


ture, Pressure. 


ture. 


Pressure. 


ture. 


Pressure. 


ture. 


Pressure. 


F. 


Inches. 


F. Inches. 


F. 


Inches. 


F. 


Inches. 


F. 


Inches. 


-60° 


O.OOOQQ 


-45° 0.00275 


-30° 


0. 00705 


-15 0° 


0.01690 


-7 5° 


0.02556 


59 


.00107 


44 1 • 00294 


29 


•00749 


14-5 


.01738 


7.0 


.02626 


58 


.00114 


43 


.00313 


28 


•0079s 


14.0 


.01787 


6.5 


. 02698 


57 


.00123 


42 


-00334 


27 


. 00844 


i3^5 


.01838 


6.0 


.02771 


56 


.00131 


41 


.00356 


26 


. 00896 


13.0 


.01890 


5^5 


.02847 


-55 


.00141 


-40 


■00379 


-25 


.00951 


-12 5 


.01943 


-5 


.02924 


54 


.00151 


39 


. 00404 


24 


.01008 


12.0 


.01998 


4.5 


• 03003 


53 


.00161 


38 


.00431 


23 


.01069 


11-5 


.02054 


4.0 


• 03084 


52 


.00173 


37 


.00458 


22 


•01 133 


II. 


.02111 


35 


.03168 


51 


.00185 


36 


. 00488 


21 


.01201 


10.5 


.02170 


30 


•03253 


-50 


.00198 


-35 


-00519 


-20 


.01272 


-10-0 


.02230 


-25 


■ 03340 


40 


.00211 


34 


■00552 


19 


■01347 


9-5 


.02292 


2.0 


.03429 


48 


.00226 


33 


.00588 


18 


.01426 


9.0 


.02356 


15 


■03520 


47 


.00241 


32 


.00625 


17 


.01510 


8.5 


.02421 


I.O 


.03614 


46 


.00258 


31 


. 00664 


16 


.01598 


8.0 


.02487 


0-5 


.03710 


Tem- 
perat. 


.0 


.1 .2 


.3 


.4 

Inches. 


.5 


.6 


.7 


.8 


s. 


.9 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inche 


Inches. 





3.03809 


0.03829 0.03849 


0.03869 


0.03890 


0.03910 


0.03930 


0.03951 


0.03971 


0.03992 


I 


.04013 


.04034 .04055 


. 04076 


■ 04097 


.04118 


.04140 


.04161 


.04183 


.04204 


2 


.04226 


.04248 


.04270 


.04292 


-04314 


■04337 


-04359 


■04382 


. 04404 


.04427 


3 


• 044 ,SO 


-04473 


. 04496 


.04519 


.04543 


. 04566 


.04590 


.04613 


.04637 


.04661 


4 


• 04685 


■ 04709 


• 04733 


■04758 


.04782 


. 04807 


.04831 


■ 04856 


.04881 


. 04906 


5 


• 0493 1 


.04956 .04982 


. 05007 


■ 05033 


.05058 


■ 050S4 


.05110 


•05136 


.05162 


6 


.05189 .05215 


.05242 


• 05269 


.05296 


■05322 


•05350 


■05377 


• 05404 


•05431 


7 


•05459^ -05487 


■05514 


■05.542 


•05570 


•05598 


•05627 


•05655 


•05684 


.05712 


8 


•05741 


.05770 


■05799 


.05828 


■05858 


• 05887 


•05917 


• 05947 


•05977 


. 06007 


Q 


.06037 


.06067 


. 06098 


.06128 


■06159 


.06190 


.06221 


.06252 


.06283 


•06315 


10 


. 06346 


.06378 


.06410 


.06442 


.06474 


.06507 


■06539 


•06572 


. 06605 


. 06638 


II 


.06670 


.06703 .06737 


.06770 


. 06804 


. 06838 


.06872 


. 06906 


. 06940 


•06975 


12 


.07009! .07044I 


.07079 


.07114 


.07149 


.07184 


.07220 


.07256 


.07292 


.07328 


13 


• 07363 1 -07399! 


•07436 


.07472 


.07509 


■07546 


■07583 


.07621 


.07658 


.07696 


14 


-07733 -07771 


. 07809 


.07848 


.07886 


■07925 


- 07964 


. 08003 


.0S042 


.08082 


15 


.08121 .08161 


.08201 


.08241 


.08281 


.08321 


.08362 


.08402 


• 08443 


. 08484 


i6 


.08525 .08566 .08608 


.08650 


.08692 


.08734 


.08777 


.08819 


.08862 


• 08905 


17 


.08948 .08991 .09035 


- 09079 


■09123 


.09167 


. 09 2 1 1 


•09255 


• 09300 


•09345 


18 


.09390' .09435 -09481 


.09526 


.09572 


.09618 


. 09664 


.09711 


•09757 


. 09804 


19 


.09851 .09898^ .09946 


.09994 


. 10042 


. 10090 


.10138 


. 10186 


• 10235 


. 10284 


20 


.10333 .10383 .10432 


. 10482 


■ 10532 


.10582 


■ 10633 


. 10683 


• 10734 


. 10785 


21 


. 10836 


. 10S8S . 10940 


.10992 


. 1 1044 


. I 1096 


.11149 


. 11202 


•I1255 


.11308 


22 


.11361 


.11415 


. I 1469 


-I1523 


.11578 


.11632 


.11687 


.11742 


.11798 


.11853 


23 


. I 1909 


.11965 


. 12022 


. 12078 


-12135 


. 12192 


.12250 


.12307 


•12365 


.12423 


24 


.12481 


.12540 


.12598 


.12657 


.12717 


.12776 


.12836 


.12896 


.12956 


. 13017 


25 


.13077 


-13138 


. 13200 


.13261 


•13323 


■ 13385 


■ 13447 


•13510 


•13573 


. 13636 


26 


• 13699 


•13763 


.13827 


■ 13891 


• 13956 


. 1402 1 


. 14086 


•14151 


. 14216 


. 14282 


27 


■ 14348 


• 14415 


. 14481 


• 14548 


. 14616 


. 14683 


.14751 


. 14819 


. 14887 


• 14956 


28 


• 15024 


- 15093 


■15163 


.15233 


■ 15303 


•15374 


■ 15444 


.15515 


•15586 


.15658 


29 


-15729 


.15801 


■ 15874 


. 15947 


. 16020 


.16093 


. 16167 


. 16241 


•16315 


. 16389 


30 


- 16463 


.16538 


. 16614 


. 16690 


. 16766 


.16842 


. 16919 


. 16996 


• 17073 


.17150 


31 


. 17228 


.17306 


.17386 


. 17466 


•17546 


.17626 


.17707 


.17788 


. 17869 


•17950 


32 


. 18032 





















Smithsonian Tables. 



164 



Table 75. 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

ENGLISH MEASURES. 



'Tempera- 
ture. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


32° 


0.1803 


0.1810 


0.1818 


0.1825 


0.1833 


0.1840 


0.1S47 


0-1855 


0.1862 


0.1870 


33 


.1877 


.1885 


.1893 


.1900 


.1908 


•191S 


•1923 


•1931 


•1939 


.1946 


34 


•1954 


.1962 


.1970 


.1978 


.1986 


.1994 


.2002 


.2010 


.2018 


.2026 


35 


.2034 


.2042 


.2050 


.2059 


.2067 


.2075 


• 2083 


.2091 


.2100 


.2108 


36 


.2117 


.2125 


•2133 


.2142 


.2150 


•2159 


.2168 


.2176 


.2185 


.2193 


37 


.2202 


.2211 


.2220 


.2228 


.2237 


.2246 


•2255 


.2264 


•2273 


.2282 


38 


.2291 


.2300 


.2309 


.2318 


.2327 


• 2336 


•2345 


•2355 


.2364 


•2373 


39 


• 2382 


.2392 


.2401 


.2410 


.2420 


.2429 


•2439 


.2448 


.2458 


.2467 


40 


.2477 


.2487 


.2496 


• 2506 


• 2516 


.2526 


•2536 


•2545 


•2555 


•2565 


41 


•2575 


•2585 


•2595 


.2606 


.2616 


.2626 


.2636 


.2646 


•2656 


.2667 


42 


.2677 


.2687 


.2698 


.2708 


.2719 


.2729 


.2740 


.2750 


.2761 


.2771 


43 


.2782 


•2793 


.2804 


.2814 


.2825 


.2836 


.2847 


.2858 


.2869 


.2880 


44 


.2891 


.2902 


.2913 


.2924 


•2935 


.2946 


.2958 


.2969 


.2981 


.2992 


45 


•3003 


.3014 


.3026 


•3037 


•3049 


.3061 


•3073 


.3084 


.3096 


.3108 


46 


.3120 


•3132 


•3144 


•3156 


•3167 


•3179 


•3191 


•3203 


•3216 


.3228 


47 


.3240 


•3252 


•3265 


•3277 


•3289 


•3301 


■3314 


•3326 


•3339 


•3352 


48 


•3365 


•3377 


•3390 


.3402 


•3415 


.3428 


•3441 


•3454. 


•3467 


•3480 


49 


•3493 


•3506 


•3519 


•3532 


•3546 


•3559 


•3572 


•3585 


•3599 


.3612 


50 


.3626 


•3639 


•3653 


.3666 


.3680 


•3694 


•3708 


.3722 


•3736 


•3749 


51 


•3763 


■3777 


•3791 


•3805 


•3820 


•3834 


•3848 


.3862 


.3876 


.3890 


52 


•3905 


•3919 


•3934 


•3948 


•3963 


•3978 


•3993 


.4007 


.4022 


•4037 


53 


.4052 


.4067 


.4082 


.4097 


.4112 


.4127 


.4142 


•4157 


.4172 


.4187 


54 


.4203 


.4218 


•4234 


•4249 


•4265 


.4280 


.4296 


.4312 


•4328 


•4343 


55 


•4359 


•4375 


•4391 


•4407 


•4423 


•4439 


•4455 


.4471 


.4488 


•4504 


56 


■4521 


•4537 


•4554 


•4570 


•4587 


.4603 


.4620 


•4637 


•4654 


.4670 


57 


.4687 


.4704 


.4721 


.4738 


•4755 


.4772 


.4790 


.4807 


.4824 


.4841 


58 


•4859 


.4876 


•4894 


.4912 


•4930 


•4947 


•4965 


•4983 


.5001 


•5019 


59 


•5037 


•S055 


•5073 


.5091 


.5110 


.5128 


.5146 


.5164 


■5183 


.5201 


60 


•5220 


•5239 


.5258 


•5276 


•5295 


•5314 


•5333 


•5352 


•5371 


•5390 


61 


•5409 


.5428 


•5448 


•5467 


.5486 


•5505 


•5525 


•5545 


•5565 


•5584 


62 


•5604 


.5624 


•5644 


•5663 


•5683 


•5703 


•5724 


•5744 


•5764 


•5784 


63 


•5805 


•5825 


.5846 


.5866 


•5887 


.5908 


•5929 


•5950 


•5971 


•5992 


64 


.6013 


.6034 


•6055 


.6076 


.6097 


.6ii8 


.6140 


.6161 


.6183 


.6204 


65 


.6226 


.6248 


.6270 


.6292 


.6314 


.6336 


•6358 


.6380 


.6402 


.6424 


66 


.6447 


.6469 


.6492 


•6514 


•6537 


•6559 


.6582 


.6605 


.6628 


•6651 


67 


.6674 


.6697 


.6721 


.6744 


.6767 


.6790 


.6814 


.6837 


.6861 


.6885 


68 


.6909 


.6932 


.6956 


.6980 


.7004 


.7028 


•7053 


.7077 


.7101 


•7125 


69 


•7150 


•7174 


.7199 


•7224 


.7249 


•7274 


•7299 


-7324 


•7348 


•7373 


70 


•7399 


•7424 


•7449 


•7474 


•7500 


•7526 


•7552 


•7577 


.7603 


.7629 


71 


•7655 


.7681 


.7707 


•7733 


.7760 


•7786 


.7813 


•7839 


.7866 


.7892 


72 


.7919 


.7946 


•7973 


.8000 


.8027 


•8054 


.8081 


.8108 


.8136 


•8163 


73 


.8191 


.8219 


.8247 


.8274 


.8302 


•8330 


•8358 


.8386 


.8414 


.8442 


74 


.8471 


•8499 


.8528 


•8556 


•8585 


.8614 


.8643 


.8672 


.8701 


•8730 


75 


.8760 


.8789 


.8818 


.8847 


•8877 


.8907 


•8937 


.8966 


.8996 


.9026 


76 


.9056 


.9086 


.9117 


.9147 


.9178 


.9208 


•9239 


.9269 


.9300 


•9331 


77 


.9362 


•9393 


.9424 


•9455 


.9487 


.9518 


•9550 


.9581 


.9613 


•9645 


78 


.9677 


.9709 


.9741 


•9773 


.9805 


•9837 


.9870 


.9902 


•9935 


.9968 


79 


1. 000 1 


I -0033 


1.0066 


1.0099 


I-OI33 


1.0166 


1.0199 


1.0232 


1.0266 


1.0300 


80 


1-0334 


1.0367 


1. 040 1 


I -043 5 


1.0470 


1.0504 


1.0538 


1.0572 


1.0607 


1.0641 



Smithsonian Tables. 



165 



Table 75. 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

ENGLISH MEASURES. 



Tempera- 
ture. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


80° 


10334 


1.0367 


1. 0401 


10435 


1.0470 


1.0504 


1.0538 


1.0572 


1.0607 


1. 064 1 


8i 


1.0676 


1. 07 1 1 


1.0746 


1.0781 


1.0816 


1.085 1 


1.0887 


1.0922 


1-0958 


1.0993 


82 


I.I02Q 


1. 1065 


I.IIOI 


1-I137 


1-1173 


1. 1209 


1. 1246 


1. 1282 


1.1319 


I-1355 


83 


1-1392 


1. 1429 


I. 1466 


1-1503 


I. 1540 


I-IS77 


1.1615 


1. 1652 


1. 1690 


1. 1727 


84 


1-1765 


1. 1803 


1.1841 


1. 1879 


1.1917 


I-I955 


I. 1994 


1.2032 


I. 2071 


1. 2 1 10 


85 


1. 2149 


1. 2188 


1.2227 


1.2266 


1-2305 


1.2344 


1-2384 


1.2423 


1.2463 


1-2503 


86 


1-2543 


1.2583 


1.2623 


1.2663 


1.2704 


1.2744 


1-2785 


1.2826 


1.2867 


1.2908 


87 


1.2949 


1.2990 


I -303 1 


1.3072 


1.3114 


1-3155 


I-3197 


1-3239 


1.3281 


1-3323 


88 


1-3365 


1-3407 


1-3450 


1.3492 


1.3535 


1-3578 


1.3621 


1.3664 


1.3707 


1-3750 


89 


1-3794 


1-3837 


1.3881 


1-3925 


1.3969 


1.4013 


1-4057 


1.4101 


1.4146 


1.4190 


90 


1-4234 


1.4279 


1-4324 


1.4369 


1.4414 


1-4459 


1-4505 


I-45SO 


1.4596 


1.4642 


91 


1.4688 


1-4734 


1.4780 


1.4826 


1.4872 


1. 49 18 


1.4965 


1. 5012 


1-5059 


1. 5106 


92 


1-5153 


1.5200 


1-5247 


1-5294 


1-5342 


1-5390 


1-5438 


1.5486 


1-5534 


1-5582 


93 


1-5630 


1.5678 


1-5727 


1-5776 


1-5825 


1-5874 


1-5923 


1-5972 


1.6022 


1. 6071 


94 


1.6121 


1.6171 


1.6221 


1.6271 


1.6321 


1-6371 


1.6422 


1.6472 


1-6523 


1-6574 


95 


1.6625 


1.6676 


1.6728 


1.6779 


1. 683 1 


1.6882 


1.6934 


1.6986 


1.7038 


1.7090 


96 


1-7143 


1-7195 


1.7248 


1. 7301 


1-7354 


1.7407 


1.7460 


1-7513 


1-7567 


1.7620 


97 


1.7674 


1.7728 


1.7782 


1.7836 


1. 7891 


1-7945 


1.8000 


1-8055 


1.8110 


1. 8 1.65 


98 


1.8220 


1.8275 


1-8331 


1.8386 


1.8442 


1.8498 


1-8554 


1.8610 


1.8667 


1.8723 


99 


1.8780 


1-8837 


1.8894 


1.895 1 


1.9008 


1.9065 


1.9123 


1.9181 


1.9239 


1.9297 


100 


1-9355 


I-9413 


1.9472 


1-9530 


1.9589 


1.9648 


1.9707 


1.9766 


1.9826 


1-9885 


lOI 


1-9945 


2.0005 


2.0065 


2.0125 


2.018s 


2.0245 


2.0306 


2.0367 


2.0428 


2.0489 


102 


2.0550 


2.061 1 


2.0673 


2-073S 


2.0797 


2.0859 


2.0921 


2.0983 


2.1046 


2.1108 


103 


2.1171 


2.1234 


2.1298 


2.1361 


2.1425 


2.1488 


2.1552 


2.i6i6 


2.1680 


2.1744 


104 


2.1809 


2.1874 


2.1939 


2.2004 


2.2069 


2.2134 


2.2200 


2.2265 


2.2331 


2.2397 


105 


2.2463 


2.2529 


2.2596 


2.2663 


2.2730 


2.2797 


2.2864 


2.2931 


2.2999 


2.3067 


106 


2-3135 


2.3203 


2.3271 


2-3339 


2.3408 


2.3477 


2.3546 


2.3615 


2.3684 


2-3753 


107 


2.3823 


2.3893 


2.3963 


2-4033 


2.4103 


2.4173 


2.4244 


2.4315 


2.4386 


2.4457 


108 


2.4529 


2.4600 


2.4672 


2.4744 


2.4816 


2.4888 


2.4961 


2.5033 


2.5106 


2-5179 


109 


2.5252 


2.5325 


2.5399 


2.5473 


2-5547 


2.5621 


2-569S 


2.5770 


2.5845 


2-5919 


no 


2-5994 


2.6069 


2.6145 


2.6220 


2.6296 


2.6372 


2.6448 


2.6524 


2.6601 


2.6678 


III 


2.6755 


2.6S32 


2.6909 


2.6986 


2.7064 


2.7142 


2.7220 


2.7298 


2.7377 


2.7456 


112 


2.7535 


2.7614 


2.7693 


2.7772 


2.7852 


2.7932 


2.8012 


2.8092 


2.8173 


2.8253 


"3 


2.8334 


2.8415 


2.8496 


2.8577 


2.8659 


2.8741 


2.8823 


2.8905 


2.8988 


2.9070 


114 


2.9153 


2.9236 


2.9320 


2.9403 


2.9487 


2-9571 


2.9655 


2.9739 


2.9823 


2.9908 


115 


2-9993 


3.0078 


3.0163 


3.0248 


3.0334 


3.0420 


3.0506 


3-0592 


3-0679 


3.0766 


116 


3-0853 


3.0940 


3.1027 


3-1115 


3-1203 


3.1291 


3-1379 


3-1467 


3-1556 


3-1645 


117 


3-1734 


3-1823 


3-1913 


3.2003 


3-2093 


3-2183 


3-2273 


3-2364 


3-2455 


3-2546 


118 


3.2637 


3.2728 


3.2820 


3.2912 


3-3004 


3-3096 


3-3189 


3.3282 


3-3375 


3-3468 


119 


3-3562 


3-3655 


3-3749 


3-3843 


3-3938 


3-4032 


3-4127 


3.4222 


3-4318 


3-4413 


120 


3-4509 


3-4605 


3-4701 


3-4797 


3.4894 


3-4991 


3-5088 


3-5185 


3-5283 


3-5381 


121 


3-5479 


3-5577 


3-5676 


3-5774 


3-5873 


3-5972 


3-6072 


3.6172 


3.6272 


3-6372 


122 


3.6472 


3-6573 


3.6674 


3.6775 


3.6876 


3-6977 


3.7079 


3.7181 


3-7284 


3-7386 


123 


3-7489 


3-7592 


3-7695 


3-7799 


3-7903 


3.8007 


3.8111 


3-8215 


3-8320 


3-8425 


124 


3-8530 


3.8636 


3-8742 


3.8848 


3-8954 


3.9060 


3.9167 


3-9274 


3-9381 


3-9488 


125 


3-9596 


3-9704 


3-9813 


3-9921 


4.0030 


4.0139 


4.0248 


4-0357 


4.0467 


4-0577 


126 


4.0687 


4.0797 


4.0908 


4.1019 


4.1131 


4.1242 


4.1354 


4.1466 


4-1578 


4.1690 


127 


4.1803 


4.1916 


4-2030 


4-2143 


4-2256 


4-2370 


4.2485 


4-2599 


4.2714 


4.2829 


128 


4-2945 


4.3061 


4-3177 


4-3293 


4-3410 


4-3527 


4.3645 


4-3762 


4.3880 


4.3998 


129 


4.4116 


4-4235 


4-4354 


4-4473 


4.4592 


4-47" 


4.4831 


4-4951 


4-5072 


4-5192 


130 


4-5313 


4-5434 


4-5555 


4-5677 


4-5798 


4.5921 


4.6043 


4.6166 


4.6289 


4.6412 



Smithsonian Tables. 



166 



Table 75. 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

ENGLISH MEASURES. 



Temper- 
ature. 


,0 


.1 


.2 


.3 


.4 

Inches. 


.5 


.6 


.7 


.8 


.9 




F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 




130° 


4-531 


4-543 


4-556 


4.568 


4.580 


4-592 


4.604 


4.617 


4.629 


4.641 




131 


4-654 


4.666 


4.678 


4.691 


4-703 


4.716 


4.728 


4.741 


4-754 


4.766 




132 


4-779 


4.792 


4.804 


4.817 


4.830 


4-843 


4-855 


4.868 


4.881 


4-894 




133 


4.907 


4.920 


4-933 


4-946 


4-959 


4.972 


4-985 


4-998 


5.012 


5-025 




134 


5-038 


5-051 


5 -065 


5.078 


5.091 


5-105 


5. 118 


5-132 


5-145 


5-158 




135 


5-172 


S.186 


5-199 


5-213 


5.226 


5-240 


5-254 


5-268 


5-281 


5-295 




136 


5-309 


5-323 


5-337 


5-351 


5-365 


5-379 


S-392 


5-407 


5-421 


5-435 




137 


5-449 


5-463 


5-477 


5-492 


5-506 


5-520 


5-535 


5-549 


5-563 


5-578 




138 


5-592 


5.607 


5.621 


5-636 


5-650 


5-665 


5.680 


5-694 


5-709 


5-724 




139 


5-739 


5-754 


5-768 


5-783 


5-798 


5-813 


5.828 


5-843 


5-858 


5-873 




140 


5-889 


5-904 


5-919 


5-934 


5-949 


5-965 


5-980 


5-995 


6.011 


6.026 




141 


6.041 


6-057 


6.072 


6.088 


6.104 


6. 119 


6-135 


6. 151 


6.166 


6.182 




142 


6.198 


6.214 


6.229 


6.245 


6.261 


6.277 


6-293 


6.309 


6-325 


6.341 




143 


6.358 


6.374 


6.390 


6.406 


6.422 


6-439 


6-455 


6.472 


6.488 


6.504 




144 


6.521 


6-537 


6.554 


6-571 


6-587 


6.604 


6.621 


6.637 


6.654 


6.671 




145 


6.688 


6.705 


6.722 


6-739 


6.756 


6.773 


6.790 


6.807 


6.824 


6.841 




146 


6.858 


6.876 


6.893 


6.910 


6.928 


6.945 


6.962 


6.980 


6.997 


7-015 1 




147 


7.032 


7.050 


7.068 


7-085 


7-103 


7. 121 


7-139 


7.156 


7-174 


7.192 j 




148 


7.210 


7.228 


7.246 


7.264 


7.282 


7.300 


7-319 


7-337 


7-355 


7-374 1 




149 


7-392 


7.410 


7-429 


7-447 


7.466 


7-484 


7-503 


7-521 


7-540 


7-559 




150 


7-577 


7-596 


7-615 


7-634 


7-653 


7.672 


7.691 


7.710 


7.729 


7-748 




151 


7.767 


7.786 


7-80S 


7.824 


7-844 


7.863 


7.882 


7.902 


7.921 


7.941 




152 


7.960 


7-980 


8.000 


8.019 


8-039 


8.059 


8.078 


8.098 


8.118 


8.138 




153 


8.158 


8.178 


8.198 


8.218 


8.238 


8.258 


8.278 


8.298 


8.319 


8-339 




154 


8.360 


8.380 


8.400 


8.421 


8.441 


8.462 


8.482 


8-503 


8-524 


8.545 




155 


8-565 


8.586 


8.607 


8.628 


8.649 


8.670 


8.691 


8.712 


8-733 


8.754 




156 


8.776 


8.797 


8.818 


8.839 


8.861 


8.882 


8.904 


8.925 


8.947 


8.968 




157 


8.990 


9.012 


9-034 


9-OS5 


9-077 


9-099 


9. 121 


9-143 


9.165 


9.187 




158 


9.209 


9.231 


9-253 


9.276 


9.298 


9-320 


9-342 


9-365 


9-387 


9.410 




159 


9-432 


9-455 


9.478 


9.500 


9-523 


9-546 


9-569 


9-592 


9-615 


9.638 




160 


9.661 


9.684 


9.707 


9-730 


9-753 


9.776 


9-799 


9.823 


9.846 


9.870 




161 


9-893 


9.916 


9.940 


9.964 


9.987 


10.01 1 


10.035 


10.059 


10.082 


10.106 




162 


10.130 


10.154 


10.178 


10.203 


10.227 


10.251 


10.275 


10.299 


10.324 


10.348 




163 


10.373 


10.397 


10.422 


10.446 


10.471 


10.495 


10.520 


10-545 


10.570 


10.595 




164 


10.620 


10.645 


10.670 


10.695 


10.720 


10-745 


10.770 


10.795 


10.821 


10.846 




165 


10.872 


10.897 


10.922 


10.948 


10.974 


10.999 


11.025 


11.051 


11.077 


II. 102 




166 


H.128 


II. 154 


II. 180 


11.206 


11.232 


11.258 


11.284 


11.311 


11.337 


11.363 




167 


11.390 


11.417 


11.444 


11.470 


11.497 


11-523 


11.550 


11-577 


11.604 


11.631 




168 


11.658 


11.685 


II. 712 


11-739 


11.766 


11-793 


11.821 


11.848 


11.875 


11.903 




169 


11.930 


11-957 


11.985 


12.013 


12.040 


12.068 


12.096 


12.124 


12.152 


I2.l8o 




170 


12.208 


12.236 


12.264 


12.292 


12.320 


12.349 


12.377 


12.406 


12.434 


12.463 




171 


12.491 


12.520 


12.548 


12-577 


12.606 


12.635 


12.664 


12.693 


12.722 


12.751 




172 


12.780 


12.809 


12.838 


12.868 


12.897 


12.927 


12.956 


12.986 


13.01S 


13.045 




173 


13-074 


13.104 


13-134 


13.164 


13-194 


13.224 


13.254 


13.284 


13.314 


13-344 




174 


13-374 


13-405 


13-435 


13-465 


13.496 


13-527 


13-557 


13-588 


13.619 


13.649 




175 


13.680 


13. 711 


13-742 


13-773 


13.804 


13-835 


13.867 


13.898 


13.929 


13.961 




176 


13.992 


14.024 


14-055 


14.087 


14. 118 


14.150 


14.182 


14.214 


14.246 


14.278 




177 


14.310 


14.342 


14-374 


14.406 


14.438 


14.471 


14-503 


14-536 


14.568 


14.601 




178 


14-633 


14.666 


14.699 


14-731 


14.764 


14-797 


14.830 


14.864 


14.897 


14.930 




179 


14.963 


14.996 


15-030 


15-063 


15-097 


15-130 


15.164 


15-197 


15-231 


15-265 




180 


15.299 


15-333 


15-367 


15.401 


15-435 


15.469 


15-504 


15-538 


15-572 


15-607 



Smithsonian Tables. 



167 



Table 75. 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

ENGLISH MEASURES, 



Tempera- 
ture. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


180° 


15.299 


15-333 


15-367 


15.401 


15-435 


15.469 


15-504 


15.538 


15.572 


15.607 


i8i 


15.641 


15.676 


15.710 


15.745 


15.780 


15.815 


15-850 


15.885 


15.920 


15.955 


182 


15.990 


16.025 


16.060 


16.096 


16.131 


16.167 


16.202 


16.238 


16.274 


16.309 


183 


16.345 


16.381 


16.417 


16.453 


16.489 


16.525 


16.561 


16.598 


16.634 


16.670 


184 


16.707 


16.743 


16.780 


16.817 


16.853 


16.890 


16.927 


16.964 


17.001 


17.038 


185 


17-075 


17. 112 


17.150 


17.187 


17.224 


17.262 


17.300 


17.337 


17.375 


17.413 


186 


17450 


17.488 


17.526 


17-564 


17.602 


17.641 


17.679 


17.717 


17.756 


17.794 


187 


17.832 


17.871 


17.910 


17.948 


17-987 


18.026 


18.065 


18.104 


18.143 


18.182 


188 


1S.221 


18.261 


18.300 


18.340 


18.379 


18.419 


18.458 


18.498 


18.538 


18.578 


189 


18.618 


18.658 


18.698 


18.738 


18.778 


18.818 


18.859 


18.899 


18.940 


18.980 


190 


19.021 


19.062 


19.102 


19-143 


19.184 


19.225 


19.266 


19.308 


19.349 


19.390 


IQI 


19-431 


19-473 


19-514 


19-556 


19.598 


19.639 


19.681 


19.723 


19.765 


19.807 


192 


19.849 


19.892 


19-934 


19.976 


20.019 


20.061 


20.104 


20.146 


20.189 


20.232 


193 


20.275 


20.318 


20.361 


20.404 


20.447 


20.490 


20.533 


20.577 


20.620 


20.664 


194 


20.707 


20.751 


20.795 


20.839 


20.883 


20.927 


20.971 


21.015 


21.059 


21.103 


195 


21.148 


21.192 


21.237 


21.282 


21.326 


21.371 


21.416 


21.461 


21.506 


21.551 


196 


21-597 


21.642 


21.687 


21.733 


21.778 


21.824 


21.870 


21.915 


21.961 


22.007 


197 


22.053 


22.099 


22.145 


22.192 


22.238 


22.284 


22.331 


22.377 


22.424 


22.471 


198 


22.517 


22.564 


22.611 


22.658 


22.706 


22.753 


22.800 


22.847 


22.895 


22.942 


199 


22.990 


23-038 


23-085 


23.133 


23.181 


23.229 


23.277 


23.325 


23.374 


23.422 


200 


23-470 


23-519 


23.568 


23.616 


23.665 


23.714 


23.763 


23.812 


23.S61 


23.910 


201 


23-959 


24.009 


24.058 


24.108 


24-157 


24.207 


24.257 


24.307 


24.357 


24.407 


202 


24-457 


24-507 


24-557 


24.608 


24-658 


24.709 


24.759 


24.810 


24.861 


24.912 


203 


24.963 


25-014 


25-065 


25.116 


25.168 


25.219 


25.271 


25.322 


25.374 


25.426 


204 


25-478 


25-530 


25.582 


25-634 


25.686 


25.738 


25.791 


25.843 


25.896 


25-948 


205 


26.001 


26.054 


26.107 


26.160 


26.213 


26.266 


26.319 


26.373 


26.426 


26.480 


206 


26.534 


26.587 


26.641 


26.695 


26.749 


26.803 


26.857 


26.912 


26.966 


27.021 


207 


27.075 


27.130 


27.184 


27-239 


27.294 


27.349 


27.404 


27.460 


27.515 


27.570 


208 


27.626 


27.681 


27-737 


27.793 


27.848 


27.904 


27.960 


28.016 


28.073 


28.129 


209 


28.185 


28.242 


28.298 


28.355 


28.412 


28.469 


28.526 


28.583 


28.640 


28.697 


210 


28.754 


28.812 


28.869 


28.927 


28.985 


29.042 


2Q.100 


29.158 


29.216 


29.275 


211 


29-3S3 


29.391 


29-450 


29.508 


29-567 


29.626 


29.685 


29.744 


29.803 


29.862 


212 


29.921 


29.981 


30.040 


30.100 


30-159 


30.219 


30.279 


30.339 


30.399 


30.459 


213 


30-519 


30.580 


30.640 


30.701 


30.761 


30.822 


30.883 


30.944 


31.005 


31.066 


214 


31.127 


31.189 


31-250 


31.3" 


31-373 


31.435 


31.497 


31.559 


^1.621 


31.683 



Smithsonian Tables. 



168 



Table 76. 



PRESSURE OF AQUEOUS VAPOR OVER ICE. 

METRIC MEASURES 



Tempera- 


Vapor 


Tempera- 


Vapor 


Tempera- 


Vapor 


Tempera- 


Vapor 


Tempera- 


Vapor 


ture 


pressure 


ture 


pressure 


ture 


pressure 


ture 


pressure 


ture 


pressure 


C. 


mm. 


C. 


mm. 


C. 


mm. 


C. 


mm. 


C. 


mm. 


—70° 


0.0019 


—60° 


0.0080 


-50.0° 


0.0294 


—45.0° 


0.0537 - 


-40.0° 


0.0964 


69 


0.0022 


59 


0.0092 


49.5 


0.0308 


44-5 


0.0570 


39-5 


0.1020 


68 


0.0026 


58 


0.0105 


49.0 


0.0329 


44.0 


0.0605 


390 


0.1080 


67 


0.0030 


57 


0.0120 


48-5 


0.0350 


43-5 


0.0642 


38.5 


O.II43 


66 


0.0035 


56 


0.0137 


48.0 


0.0373 


43.0 


0.0680 


38.0 


0.1209 


—65 


0.0040 


—55 


0.0156 


—47.5 


0.0396 


—42.5 


0.0721 - 


-37.5 


0.1279 


64 


0.0046 


54 


0.0178 


47.0 


0.0421 


42.0 


0.0765 


37.0 


0.1352 


63 


0.0053 


53 


0.0202 


46.5 


0.0448 


41.5 


0.08 II 


36.5 


0.1430 


62 


0.0061 


52 


0.0229 


46.0 


0.0476 


41.0 


0.0859 


36.0 


0.1511 


61 


0.0070 


51 


0.0260 


45-5 


0.0506 


40.5 


0.0910 


35.5 


0.1596 


Tem- 
pera- 
ture 


.0 


.1 .2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 




mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


—35° 


0.1686 


0.1668 


0.1650 


0.1632 


O.1614 


0.1596 


0.1579 


0.1562 


0.1545 


0.1528 


34 


0.1880 


0.1860 


0.1840 


0.1820 


0.1800 


O.1781 


O.I 761 


0.1742 


0.1723 


0.1705 


33 


0.2094 


0.2072 


0.2050 


0.2028 


0.2006 


0.1984 


0.1963 


0.1942 


O.I 92 1 


O.1901 


2>2 


0.2331 


0.2306 


0.2281 


0.2257 


0.2233 


0.2209 


0.2186 


0.2163 


0.2140 


0.21 17 


31 


0.2591 


0.2564 


0.2537 


0.2510 


0.2484 


0.2458 


0.2432 


0.2406 


0.2381 


0.2355 


—30 


0.2878 


0.2848 


0.2818 


0.2789 


0.2760 


0.2731 


0.2703 


0.2674 


0.2646 


0.2619 


29 


0.3194 


O.3161 


0.3128 


0.3096 


0.3064 


0.3032 


0.3001 


0.2970 


0.2939 


0.2908 


28 


0.3541 


0.3505 


0.3469 


0.3433 


0-3398 


0-3363 


0.3329 


0.3295 


0.3261 


0.3227 


27 


0.3923 


0.3883 


0.3843 


0.3804 


0.3766 


0.3727 


0.3689 


0.3652 


0.3615 


0.3578 


26 


0.4341 


0.4297 


0.4254 


0.421 1 


0.4169 


0.4127 


0.4085 


0.4044 


0.4003 


0.3963 


—25 


0.4800 


0.4752 


0.4705 


0.4658 


O.4611 


0-4565 


0.4519 


0.4474 


0.4429 


0.4385 


24 


0.5303 


0.5251 


0-5199 


0.5147 


0.5096 


0.5046 


0.4996 


0.4946 


0.4897 


0.4848 


23 


0.5854 


0.5796 


0.5739 


0.5683 


0.5628 


0.5572 


0.5517 


0.5463 


0.5409 


0.5356 


22 


0.6456 


0.6393 


0.6331 


0.6270 


0.6209 


0.6148 


0.6088 


0.6029 


0.5970 


0.5912 


21 


O.7115 


0.7046 


0.6978 


O.691I 


0.6844 


0.6778 


0.6713 


0.6648 


0.6583 


0.6519 


-20 


0.7834 


0.7759 


0.7685 


O.7611 


0.7538 


0.7466 


0.7395 


0.7324 


0.7254 


0.7184 


19 


0.8618 


0.8537 


0.8456 


0.8376 


0.8296 


0.8217 


0.8139 


0.8062 


0.7985 


0.7909 


18 


0.9474 


0.9385 


0.9297 


0.9209 


0.9123 


0.9037 


0.8952 


0.8867 


0.8784 


0.8701 


17 


1.0406 


1.0309 


I.0213 


I.OI18 


1.0024 


0.9930 


0.9837 


0.9745 


0.9654 


0.9563 


16 


I.I421 


I.I316 


I.I2II 


I.II08 


1. 1005 


1.0903 


1.0802 


1.0702 


1.0602 


1.0504 


—15 


1-2525 


I.24II 


1.2297 


I.2184 


1.2072 


I. 1962 


1. 1852 


I.I743 


1.1635 


1.1527 


14 


1.3726 


1. 3601 


1.3477 


1-3355 


1.3233 


I-3113 


1.2993 


1.2875 


1.2757 


1. 2641 


13 


1.5029 


1.4894 


1-4759 


1.4626 


1.4495 


1.4364 


1.4234 


1.4105 


1.3978 


1.3851 


12 


1.6444 


1.6297 


1.6151 


1 .6007 


1.5864 


1.5722 


I-5581 


I -5441 


1.5302 


1. 5165 


II 


1.7979 


1.7820 


1.7662 


1.7506 


1-7350 


1. 7196 


1-7043 


1.6892 


1. 6741 


1.6592 


—10 


1.9643 


1.9470 


1.9299 


1.9129 


1.8961 


1.8794 


1.8628 


1.8464 


1. 8301 


I.8139 


9 


2.1445 


2.1258 


2.1073 


2.0889 


2.0707 


2.0526 


2.0347 


2.0168 


1.9992 


I.9817 


8 


2.3395 


2.3193 


2.2993 


2.2794 


2.2596 


2.2401 


2.2206 


2.2014 


2.1823 


2.1633 


7 


2.5505 


2.5287 


2.5070 


2-4855 


2.4642 


2.4430 


2.4220 


2.401 1 


2.3804 


2.3599 


6 


2.7785 


2-7549 


2.7315 


2.7083 


2.6852 


2.6623 


2.6396 


2.6171 


2.5947 


2.5725 


- 5 


3.0248 


2.9993 


2.9740 


2.9489 


2.9240 


2.8993 


2.8747 


2.8504 


2.8262 


2.8023 


4 


3.2907 


3.2632 


3.2359 


3.2088 


3.1819 


3.1552 


3.1287 


3-1025 


3.0764 


3.0505 


3 


3.5775 


3.5479 


3.5184 


3.4892 


3.4602 


3-4314 


3.4028 


3-3745 


3.3463 


3.3184 


2 


3.8868 


3-8548 


3.8230 


3-7916 


3-7603 


3.7292 


3-6985 


3-6678 


3-6375 


3.6074 


I 


4.2199 


4.1854 


4-1513 


4.1174 


4.0837 


4.0502 


4.OI71 


3.9841 


3-9515 


3.9190 


— 


4.5802 


4.5428 


4-5057 


4.4690 


4-4325 


4.3962 


4.3604 


4.3248 


4.2896 


4.2546 



Smithsonian Tables 



169 



Table 77. 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

METRIC MEASURES. 



Tem- 
pera- 
ture. 

C. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


0" 

I 

2 

3 
4 


4.580 
4.924 
5-291 
S.682 
6.098 


4.614 
4.960 
5-329 
5-723 
6. 141 


4-647 
4-996 
5-368 
5-763 
6.185 


4.681 
5-032 
5.406 
5-804 
6.228 


4.715 
5.068 

5-445 
5-846 
6.272 


4-750 
5-105 
5-484 
5.887 
6.316 


4.784 
5.142 

5.523 
5-929 
6.361 


4.819 

5-179 
5-562 

5-971 
6.406 


4-854 
5.216 
5.602 
6.013 
6.450 


4.889 
5-254 
5-642 
6.056 
6.496 


5 

6 

7 
8 

9 


6.541 
7.012 

7.513 
8.045 
8.610 


6.587 
7.061 

7-565 
8.100 
8.669 


6.633 
7. no 
7-617 
8.156 

8.727 


6.680 

7-159 
7.669 
8.211 
8.786 


6.726 
7.209 

7.722 
8.267 
8.846 


6.773 
7-259 
7-775 
8.324 
8.906 


6.820 
7-309 
7.828 
8.380 
8.966 


6.868 
7.360 

7.882 

8.437 
9.026 


6.916 
7.410 
7-936 
8.494 
9.087 


6.964 
7.462 
7-991 
8.552 
9.148 


10 

II 

12 

13 
14 


9.210 

9.846 

10.521 

11.235 
11.992 


9.272 

9.912 

10.590 

11.309 

12.070 


9-334 

9.978 

10.660 

11-383 
12.149 


9-397 
10.044 
10.731 
11-458 
12.228 


9.460 

lO.III 

10.801 

11-533 
12.307 


9-523 
10.178 
10.873 
11.608 

12.387 


9-587 
10.246 
10.944 
11.684 
12.468 


9.651 
10.314 
n.016 
II. 761 
12.549 


9.716 
10.382 
11.089 
11.837 
12.630 


9.781 
10.451 
II. 162 
11.915 
12.712 


15 

1 6 

17 
i8 

19 


12.794 
13.642 
14.539 
15.487 
16.489 


12.877 
13.729 
14.632 

15-585 
16.593 


12.960 
13.817 
14-725 
15.6S3 
16.696 


13-043 
13.906 
14.818 

15.782 
16.801 


13.127 

13-995 
14.912 

15.882 
16.906 


13.212 
14.084 
15-007 
15-981 
17.011 


13-297 
14.174 
15.102 
16.082 
17. 117 


13-383 
14.265 

15-197 
16.183 
17.224 


13.460 

14-356 

15-293 
16.285 

17-331 


13-555 
14.447 
15-390 
16.387 
17-439 


20 

21 
22 
23 
-'4 


17.548 
18.665 
19.844 
21.087 
22.398 


17-657 
18.780 
19.965 
21-215 
2 2-533 


17.766 
18.896 
20.087 

21.344 
22.669 


17.877 
19.012 
20.210 

21.473 
22.805 


17.987 
19.129 

20.333 
21.604 
22.942 


18.099 
19.247 
20.457 
21-734 
23.080 


18.211 

19-365 
20.582 
21.866 
23.219 


18.323 
19.484 
20.707 
21.998 
23-358 


18.437 
19-603 
20.833 
.22.131 
23.498 


18.551 
T9.723 
20.960 
22.264 
23.638 


25 

26 
27 
28 
29 


23.780 

25-235 
26.767 
28.380 
30.076 


23.922 

25-385 
26.925 
28.546 
30.251 


24.065 

25-535 
27.083 
28.712 
30.426 


24.209 
25-687 
27.242 
28.880 
30.602 


24.353 
25-839 
27.402 
29.048 
30.779 


24.498 
25.991 

27-563 
29.217 

30.957 


24.644 
26.145 
27-725 
29-387 
31-136 


24.791 
26.299 
27.887 
29-558 
31-315 


24.938 
26.455 
28.051 
29.730 
31.496 


25.086 
26.610 
28.215 
29.903 
31.678 


30 

31 

32 
33 
34 


31.860 

33-735 
35-705 
37-775 
39-947 


32.043 
33-928 
35-908 
37-987 
40.170 


32.228 
34.121 
36.111 
38.201 
40.394 


32-413 
34-316 

36.315 
38.41S 
40.619 


32.599 
34.512 
36.521 
38.631 
40.846 


32-786 
34-708 

36.727 
38.848 

41-073 


32-974 
34.906 

36.935 
39-065 
41.302 


33-163 
35-104 
37-143 
39-284 
41-531 


33-353 
35-303 
37-353 
39-504 
41.762 


33-543 
35-504 , 
37-563 
39-725 
41.994 


35 

36 
37 
38 
39 


42.227 

44-619 

47.127 

49-756 
52-510 


42.461 
44.864 

47.384 
50.025 

52.793 


42.696 
45. Ill 

47-643 
50.296 

53-077 


42.932 
45-358 
47-902 
50.569 
53-362 


43-170 
45-608 
48.163 
50.842 
53-649 


43.408 
45-858 
48.426 
51-I17 
53-937 


43-648 
46.109 
48.689 

51-393 
54.226 


43-889 
46.362 

48.954 
51.670 
54-516 


44-131 
46.615 
49.220 

51-949 
54-808 


44-374 
46.870 

49-487 
52.229 
55-101 


40 

41 
42 
43 
44 


55-396 
58.417 
61.580 
64.889 
68.350 


55.692 
58.727 
61.904 
65.228 
68.704 


55-989 
59-038 
62.230 

65-569 
69.061 


56.288 
59-351 
62.557 
65.911 
69.419 


56.588 
59-665 
62.886 
66.255 
69.778 


56.889 
59.981 
63.216 
66.600 
70.139 


57-192 
60.298 

63-547 
66.947 
70.502 


57-496 
60.616 
63.880 
67.295 
70.866 


57.802 
60.936 
64.215 

67-645 
71.232 


58.109 
61.257 

64-551 
67.997 

71-599 


45 

46 

47 
48 

49 


71.968 
75.751 
79-703 
83.830 
88.140 


72-339 
76.138 
80.107 

84.253 
88.581 


72.712 

76.527 
80.514 
84.677 
89.024 


73.086 
76.918 
80.922 
85.104 
89.470 


73-461 
77-311 
81-332 
85-532 
89.916 


73-839 
77-705 
81.744 
85.962 

90.365 


74-218 
78.101 
82.158 
86.304 
90.816 


74-598 
78.499 

82.573 
86.828 
91.269 


74.981 
78.898 
82.990 
87-263 
91.723 


75-365 
79.300 
83-409 
87.701 
92.180 


50 


92.639 


93.099 


93-562 


94.026 


94.492 


94.961 


95-431 


95-903 


96.378 


96.854 



Smithsonian Tables. 



170 



Table 77. 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

METRIC MEASURES. 



Tem- 
pera- 
ture^ 

C. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


50° 

51 
52 
53 
54 


92.64 

97-33 
102.23 

107-33 
112.66 


93.10 

97-81 

102.73 

107.86 

113.20 


93-56 

98.30 

103-23 

108.38 

113-75 


94.03 

98.78 

103.74 
108.91 
114.30 


94-49 

99-27 

104.25 

109.44 
114.85 


94.96 

99-76 

104-75 

109.97 

115-40 


95-43 
100.25 
105.27 
110.50 
115-96 


95.90 
100.74 
105.78 
111.04 
116.51 


96.38 
101.23 
106.30 

111.57 
117.07 


96.85 
101.73 
106.81 
112.11 
117.64 


55 

56 
57 
58 
59 


118.20 
123.98 
130.00 
136.26 
142.78 


118.77 

124-57 
130.61 
136.90 

143-45 


119.34 
125.16 

131-23 
137-54 
144.12 


119.91 

125.76 

131.85 
138.19 
144.79 


1 20.49 
126.36 
132-47 
138.84 
145.46 


121.06 
126.96 
133-10 

139-49 
146.14 


121.64 
127.56 

133-73 
140.14 
146.82 


122.22 
128.17 
134.36 
140.80 
147.50 


122.81 
128.77 
134.99 
141.46 
148.19 


123.39 
129.38 
135.62 1 
142.12 
148.88 


60 

61 
62 

63 

64 


149-57 
156.62 
163.96 
171.59 
179-52 


150.26 

157-34 
164.71 
172.37 
180.32 


150-95 
158.07 
165.46 

173.15 
181. 14 


151.65 
158.79 
166.22 

173-93 
181.95 


152-35 
159-52 
166.98 

174.72 
1S2.77 


153-06 
160.26 
167.74 
175-S1 
183-59 


153-77 
160.99 
168.50 
176.31 
184.42 


154.48 
161.73 
169.27 
177.10 
185.25 


155.19 
162.47 
170.04 
177.91 
186.08 


155.90 
163.21 
170.81 
178.71 
186.91 


65 

66 
67 
68 
69 


187-75 
196.31 
205.19 
214.41 
223.98 


188.59 
197.18 
206.10 

215-35 
224.96 


189.44 
198.06 
207.01 
216.30 
225.94 


190.28 
198.94 
207.92 
217.24 
226.92 


191. 13 
199.82 
208.84 
218.20 
227.91 


191.99 
200.71 
209.76 
219.15 
228.90 


192.85 
201.60 
210.68 
220.11 
229.89 


193.71 
202.49 
211.61 
221.07 
230.89 


194.57 
203.39 
212.54 
222.04 
231.89 


195-44 
204.29 

213-47 
223.01 1 
232.90 


70 

71 
72 

73 
74 


233-91 
244.21 
254-88 
265.96 
277-43 


234.92 
245.26 

255-97 
267.08 
278.60 


235-94 
246.31 

257-07 
268.22 
279.77 


236.96 

247-37 
258.16 

269-35 
280.95 


237-98 
248.43 
259-27 
270.50 
282.13 


239-01 
249-50 
260.37 
271.64 
283.32 


240.04 

250-57 
261.48 
272.79 
284.51 


241.08 
251.64 
262.59 
273-94 
285-71 


242.12 
252.72 
263.71 
275.10 
286.90 


243.16 
253.80 
264.83 
276.26 
288.11 ! 


75 

76 
77 
78 
79 


289.32 
301.63 
314-38 
327-59 
341-25 


290-53 
302.89 
315-68 

328.93 
342.65 


291.74 

304-15 
316.99 
330.28 
344-04 


292-97 
305-41 
318.30 

331.64 
345.44 


294.19 
306.68 
319.61 
333-00 
346-85 


295-42 
307-95 
320.93 
334-36 
348.26 


296.65 

309-23 
322.25 

335-73 
349-68 


297.89 
310.51 
323-58 
337-10 
351-10 


299.13 
311.80 
324-91 
338 48 
352-53 


300.38 

313-09 
326.25 1 
339-86 ' 
353-96 j 


80 

81 

82 

83 

84 


355-40 
370.03 
385-16 
400.81 
416.99 


356.84 
371-52 
386.70 
402.40 
418.64 


358.28 
373-01 
388.25 
404.00 
420.29 


359.73 
374.51 
389.80 
405.61 
421.95 


361.19 
376.02 
391-36 
407.22 
423-61 


362.65 
377-53 
392-92 
408.83 
425.28 


364.11 
379-05 
394-49 
410.45 

426.9s 


365-58 
380.57 
396.06 
412.08 
428.64 


367.06 
382.09 
397-64 
413-71 
430.32 


368.54 I 

383-62 

399.22 

415.35 , 
432.01 


85 

86 

87 
88 
89 


433-71 
450.99 
468.84 
487.28 
506.32 


435-41 
452.75 
470.66 
489.16 
508.26 


437.12 

454.51 
472.48 
491.04 
510.20 


438.83 
456.28 
474.31 
492-93 
512.15 


440.5 s 
458.06 

476.14 
494.82 

514.11 


442.28 
459.84 
477.99 
496.72 
516.07 


444-01 
461.63 
479-83 
498-63 
518.04 


445-75 
463.42 
481.68 

500.54 
520.01 


447.49 
465.22 

483-54 
502.46 
521.99 


449.24 
467.03 
485.41 
504-39 
523-98 


90 

91 
92 

93 
94 


525-97 
546.26 
567.20 
588.80 
611.08 


527-97 
548.33 
569-33 
591.00 

613-35 


529.98 
550.40 
571-47 
593-20 
615.62 


531-99 
552-48 
573.61 
595-41 
617.90 


534-01 
554-56 
575.76 
597-63 
620.19 


536-04 
556-65 
577-92 
599.86 
622.48 


538-07 
558.75 
580.08 
602.09 
624.79 


=140. 11 

560.85 
582.25 

604.33 
627.09 


542.15 
562.96 

584-43 
606.57 
629.41 


544-21 
565.08 
586.61 
608.82 
631-73 


95 

96 

97 
98 

99 


634.06 

657-75 
682.18 

707-35 
733-28 


636.40 
660.16 
684.66 
709.90 
735-92 


638.74 
662.58 
687.15 
712.47 
738-56 


641.09 
665.00 
689.65 

715-04 
741.21 


643-45 
667.43 
692.15 

717-63 
743-87 


645.82 
669.87 
694.67 
720.22 
746.54 


648.19 
672.32 
697.19 
722.81 
749.22 


650.57 
674.77 
699.71 
725.42 
751.90 


652.96 
677.23 
702.25 
728.03 
754-59 


655-35 
679-70 
704-79 
730.65 

757-29 


100 


760.00 


762.72 


765.44 


768.17 


770.91 


773.66 


776.42 


779.18 


781-95 


784-73 



Smithsonian Tables. 

17 



171 



Table 77. 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

METRIC MEASURES. 



Temperature. 


0° 

mm. 


r 


2° 


3° 


4' 


5° 


6° 


7" 


8° 


9° 


C. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


mm. 


100° 


760.0 


787-5 


815.9 


845.0 


875-1 


906.0 


937-8 


970. 5 


1004. 2 


1038.8 


no 


1074.4 


IIII.O 


1148.6 


1187.2 


1226.9 


1267.7 


1309.6 


1352.6 


1396-8 


1442. I 


1 20 


1488. 7 


1536-4 


1585-4 


1635-7 


1687-3 


1740. 2 


1794-4 


1850.0 


1907.0 


1965-4 


130 


2025. 2 


2086. 5 


2149-3 


2213.7 


2279.6 


2347.0 


2416. I 


2486.8 


2559-2 


2633.2 


140 


2709.0 


2786.5 


2865.8 


2947-0 


3029.9 


3114-7 


3201.4 


3290.1 


3380. 7 


3473-3 


150° 


3567-9 


3664.6 


3763-3 


3864-2 


3967.2 


4072.4 


4179.8 


4289.5 


4401.5 


4515-7 


160 


4632.4 


4751-4 


4872.8 


4996.7 


5123- I 


5252-0 


5383-4 


5517-5 


5654-2 


5793-5 


170 


5935-6 


6080.4 


6228.0 


6378.4 


6531-7 


6687.8 


6846.9 


7009 . 


7174.0 


7342.1 


180 


7513-3 


7687.7 


7865.2 


8045.9 


8229.8 


8417.0 


8607.6 


8801.5 


8998.9 


9199.6 


190° 


9404 


9612 


9823 


10038 


10257 


10479 


10705 


10935 


1 1 169 


1 1407 


200 


11648 


1 1894 


1 2 143 


12397 


12654 


12916 


13182 


13452 


13727 


14006 


210 


14289 


14577 


14869 


15165 


15467 


15772 


16083 


16398 


16718 


17043 


220 


17372 


17707 


18046 


18391 


18740 


19095 


19454 


19819 


20190 


20565 


230° 


20946 21332 


21724 


22121 


22524 


22932 


23347 


23766 


24192 


24623 


240 


25061 1 25504 


25953 


26408 


26870 


27337 


27811 


28291 


28778 


29270 


250 


29770 


3027s 


30787 


31306 


31832 


32364 


32903 


33449 


34002 


34562 


260 


35128 


35702 


36283 


36872 


37467 


38070 


38680 


39298 


39923 


40556 


270 


41197I 41845 


42501 


43165 


43836 


44516 


45204 


45899 


46603 


47316 


280° 


48036! 48765 


49503 


50248 


51003 


5 1 766 


52538 


53318 


54108 


54906 


290 


55714 


56530 


57356 


58191 


5903 s 


59888 


60751 


61624 


62506 


63398 


300 


64299 


65211 


66132 


67063 


68005 


68956 


69918 


70890 


71872 


72865 


310 


73869 


74883 


75907 


76943 


77990 


79047 


801 16 


81195 


82286 


83389 


320 


84503 


85628 


86765 


87913 


89074 


90246 


91430 


92626 


9383s 


95056 


330° 


96289 


97534 


98793 


100060 


101350 


102640 


103950 


105280 


1066 10 


107960 


340 


109320 


I 10700 


I I 2090 


I 13490 


114910 


I 16340 


117780 


119240 


120720 


122210 


330 


123710 


125220 


126760 


128310 


129870 


13 1440 


133030 


134640 


136270 


137000 1 


360 


139560 


141230 


142920 


144620 


146340 148070 


149820 


151590 


153380 


155180 


370 


157000 


158840 


160690 162560 


164450 









-. J 



SMrTHSONIAN TABLES. 



172 



PRESSURE OF AQUEOUS VAPOR OVER ICE. 

DYNAMIC MEASURES 



Table 78. 



Temp. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


C. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


—70° 


0.0026 


0.0025 


0.0025 


0.0025 


0.0024 


0.0024 


0.0024 


0.0023 


0.0023 


0.0023 


-69 


0.0030 


0.0029 


0.0029 


0.0029 


0.0028 


0.0028 


0.0027 


0.0027 


0.0027 


0.0026 


—68 


0.0035 


0.0034 


0.0034 


0.0033 


0.0033 


0.0032 


0.0032 


0.0031 


0.003 1 


0.0030 


-67 


0.0040 


0.0040 


0.0039 


0.0038 


0.0038 


0.0037 


0.0037 


0.0036 


0.0036 


0.0035 


—66 


0.0046 


0.0046 


0.0045 


0.0044 


0.0044 


0.0043 


0.0043 


0.0042 


0.0041 


0.0041 


-65 


0.0054 


0.0053 


0.0052 


0.0051 


0.0051 


0.0050 


0.0049 


0.0048 


0.0048 


0.0047 


-64 


0.0062 


0.0061 


0.0060 


0.0059 


0.0058 


0.0057 


0.0057 


0.0056 


0.0055 


0.0054 


-63 


0.0071 


0.0070 


0.0069 


0.0068 


0.0067 


0.0066 


0.0065 


0.0064 


0.0063 


0.0063 


—62 


0.0082 


0.0080 


0.0079 


0.0078 


0.0077 


0.0076 


0.0075 


0.0074 


0.0073 


0.0072 


—61 


0.0094 


0.0092 


0.0091 


0.0090 


0.0089 


0.0087 


0.0086 


0.0085 


0.0084 


0.0083 


-60 


O.OII 


O.OII 


O.OIO 


O.OIO 


O.OIO 


O.OIO 


0.0099 


0.0097 


0.0096 


0.0095 


—59 


0.012 


0.012 


0.012 


0.012 


0.012 


O.OII 


O.OII 


O.OII 


O.OII 


O.OII 


-58 


0.014 


0.014 


0.014 


0.013 


0.013 


0.013 


0.013 


0.013 


0.013 


0.012 


—57 


0.016 


0.016 


0.016 


0.015 


0.015 


0.015 


0.015 


0.015 


0.014 


0.014 


-56 


0.018 


0.018 


0.018 


0.018 


0.017 


0.017 


0.017 


0.017 


0.016 


0.016 


—55 


0.021 


0.021 


0.020 


0.020 


0.020 


0.020 


0.019 


0.019 


0.019 


0.019 


—54 


0.024 


0.023 


0.023 


0.023 


0.022 


0.022 


0.022 


0.022 


0.021 


0.021 


—53 


0.027 


0.027 


0.026 


0.026 


0.026 


0.025 


0.025 


0.025 


0.024 


0.024 


—52 


0.031 


0.030 


0.030 


0.029 


0.029 


0.029 


0.028 


0.028 


0.028 


0.027 


—51 


0.035 


0.034 


0.034 


0.033 


0.033 


0.033 


0.032 


0.032 


0.031 


0.031 


—50 


0.039 


0.039 


0.038 


0.038 


0.037 


0.037 


0.036 


0.036 


0.036 


0.035 


—49 


0.044 


0.043 


0.043 


0.042 


0.042 


0.041 


0.041 


0.040 


0.040 


0.039 


-48 


0.050 


0.049 


0.049 


0.048 


0.047 


0.047 


0.046 


0.046 


0.045 


0.044 


—47 


0.056 


0.055 


0.055 


0.054 


0.053 


0.053 


0.052 


0.052 


0.051 


0.050 


-46 


0.063 


0.063 


0.062 


0.061 


0.060 


0.060 


0.059 


0.058 


0.058 


0.057 


—45 


0.072 


0.071 


0.070 


0.069 


0.068 


0.067 


0.067 


0.066 


0.065 


0.064 


—44 


0.081 


0.080 


0.079 


0.078 


0.077 


0.076 


0.075 


0.074 


0.073 


0.072 


—43 


0.091 


0.090 


0.089 


0.088 


0.087 


0.086 


0.085 


0.084 


0.083 


0.082 


—42 


0.102 


O.IOI 


O.I 00 


0.098 


0.097 


0.096 


0.095 


0.094 


0.093 


0.092 


—41 


O.I 15 


0.II3 


O.II2 


O.III 


0.109 


0.108 


0.107 


0.106 


0.104 


0.103 


—40 


0.129 


0.127 


0.126 


0.124 


0.123 


O.I2I 


0.120 


0.II9 


O.I 17 


0.II6 


—39 


0.144 


0.142 


O.I4I 


0.139 


0.138 


0.136 


0.134 


0.133 


0.132 


0.130 


-38 


0.i6r 


0.159 


0.158 


0.156 


0.154 


0.152 


0.I5I 


0.149 


0.147 


0.146 


—37 


0.180 


0.178 


0.176 


0.174 


0.172 


O.17I 


0.169 


0.167 


0.165 


0.163 


-36 


0.201 


0.199 


0.197 


0.195 


0.193 


O.19I 


0.189 


0.186 


0.184 


0.182 



Smithsonian Tables 



173 



Table 78. 



PRESSURE OF AQUEOUS VAPOR OVER ICE. 

DYNAMIC MEASURES 



Temp. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


C. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


—35° 


0.225 


0.222 


0.220 


0.218 


0.215 


0.213 


0.2II 


0.208 


0.206 


0.204 


—34 


0.251 


0.248 


0.245 


0.243 


0.240 


0.237 


0.235 


0.232 


0.230 


0.227 


—33 


0.279 


0.276 


0.273 


0.270 


0.267 


0.265 


0.262 


0.259 


0.256 


0.253 


—32 


0.3 1 1 


0.307 


0.304 


0.301 


0.298 


0.295 


0.291 


0.288 


0.285 


0.282 


—31 


0-345 


0.342 


0.338 


0.335 


0.331 


0.328 


0.324 


0.321 


0.317 


0.314 


—30 


0.384 


0.380 


0.376 


0.372 


0.368 


0.364 


0.360 


0.357 


0.353 


0.349 


—29 


0.426 


0.421 


0.417 


0.413 


0.408 


0.404 


0.400 


0.396 


0.392 


0.388 


—28 


0.472 


0.467 


0.462 


0.458 


0.453 


0.448 


0.444 


0.439 


0.435 


0.430 


—2/ 


0.523 


0.518 


0.512 


0.507 


0.502 


0.497 


0.492 


0.487 


0.482 


0.477 


—26 


0.579 


0.573 


0.567 


0.561 


0.556 


0.550 


0.545 


0.539 


0.534 


0.528 


—25 


0.640 


0.634 


0.627 


0.621 


0.615 


0.609 


0.602 


0.596 


0.590 


0.585 


—24 


0.707 


0.700 


0.693 


0.686 


0.679 


0.673 


0.666 


0.659 


0.653 


0.646 


—23 


0.780 


0.773 


0.765 


0.758 


0.750 


0.743 


0.736 


0.728 


0.721 


0.714 


22 


0.861 


0.852 


0.844 


0.836 


0.828 


0.820 


0.812 


0.804 


0.796 


0.788 


— 21 


0.949 


0.939 


0.930 


0.921 


0.912 


0.904 


0.895 


0.886 


0.878 


0.869 


—20 


1.04 


1-03 


1.02 


I.OI 


1. 00 


1. 00 


0.986 


0.976 


0.967 


0.958 


—19 


I-I5 


1. 14 


113 


1. 12 


I. II 


1. 10 


1.09 


1.07 


1.06 


1.05 


— 18 


1.26 


1.25 


1.24 


1.23 


1.22 


1.20 


1. 19 


1. 18 


1. 17 


1. 16 


—17 


1-39 


1-37 


1.36 


1-35 


1-34 


1.32 


1.31 


1.30 


1.29 


1.27 


— 16 


1.52 


I-5I 


T.49 


1.48 


1.47 


1-45 


1.44 


143 


I.4I 


1.40 


—15 


1.67 


1.65 


1.64 


1.62 


I.6I 


1-59 


1.58 


1-57 


1-55 


1-54 


—14 


1-83 


1.81 


1.80 


1.78 


1.76 


1-75 


1-73 


1.72 


1.70 


1.69 


—13 


2.00 


1.99 


1.97 


1-95 


1-93 


1.92 


1.90 


1.88 


1.86 


1.85 


— 12 


2.19 


2.17 


2.15 


2.13 


2.12 


2.10 


2.08 


2.06 


2.04 


2.02 


— II 


2.40 


2.38 


2.35 


2.33 


2.31 


2.29 


2.27 


2.25 


2.23 


2.21 


—10 


2.62 


2.60 


2.57 


2.55 


2.53 


2-51 


2.48 


2.46 


2.44 


2.42 


— 9 


2.86 


2.83 


2.81 


2.78 


2.76 


2.74 


2.71 


2.69 


2.67 


2.64 


— 8 


3.12 


309 


3-07 


3-04 


3.01 


2.99 


2.96 


2.93 


2.91 


2.88 


— 7 


340 


3-37 


3-34 


331 


329 


3.26 


3-23 


3.20 


3-17 


3-15 


— 6 


370 


3-67 


364 


3.61 


3-58 


3-55 


3-52 


349 


346 


343 


— 5 


4-03 


4.00 


3-97 


3-93 


390 


3-87 


3-83 


3.80 


3-77 


374 


— 4 


4-39 


4-35 


4-31 


4.28 


4.24 


4.21 


4.17 


4.14 


4.10 


4.07 


— 3 


4-77 


4-73 


4.69 


4-65 


4.61 


4-58 


4-54 


450 


4.46 


4.42 


— 2 


5.18 


5-14 


5.10 


5.06 


5.01 


4-97 


4-93 


4.89 


4-85 


4.81 


— I 


5-63 


5-58 


5-53 


5-49 


5-44 


540 


5-36 


5-31 


5-27 


5-23 


— 


6.11 


6.06 


6.01 


5-96 


5-91 


5.86 


5-81 


5-77 


572 


5-67 



Smithsonian Tables 



174 



PRESSURE OF AQUEOUS VAPOR OVER WATER. 

DYNAMIC MEASURES 



Table 79. 



Temp. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


C. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


mb. 


0° 


6.II 


6.15 


6.20 


6.24 


6.29 


6-33 


6.38 


6.42 


6-47 


6.52 


I 


6.56 


6.61 


6.66 


6.71 


6.76 


6.81 


6.86 


6.90 


6.95 


7.00 


2 


7-05 


7.10 


7.16 


7.21 


7.26 


7-31 


736 


7-42 


7-47 


7.52 


3 


7.58 


7-63 


7.68 


7.74 


7-79 


7-85 


7.90 


7.96 


8.02 


8.07 


4 


8.13 


8.19 


8.25 


8.30 


8.36 


8.42 


8.48 


8.54 


8.60 


8.66 


5 


8.72 


8.78 


8.84 


8.91 


8.97 


9-03 


9.09 


9.16 


9.22 


9.28 


6 


9-35 


9.41 


9.48 


9.54 


9.61 


9.68 


9-74 


9.81 


9.88 


9.95 


7 


10.02 


10.09 


10.16 


10.22 


10.30 


10.37 


10.44 


10.51 


10.58 


10.65 


8 


IO-73 


10.80 


10.87 


10.95 


11.02 


II. 10 


II. 17 


11.25 


11.32 


11.40 


9 


11.48 


11.56 


11.64 


II. 71 


11.79 


11.87 


11-95 


12.03 


12.12 


12.20 


10 


12.28 


12.36 


12.44 


12.53 


12.61 


12.70 


12.78 


12.87 


12.95 


13.04 


II 


13-13 


13.21 


13.30 


13-39 


13.48 


13.57 


13.66 


13-75 


13.84 


13-93 


12 


14.03 


14.12 


14.21 


14-31 


14.40 


14.50 


14-59 


14.69 


14-78 


14.88 


13 


14.98 


15.08 


15-18 


15-28 


15-38 


15.48 


15-58 


15-68 


15-78 


15-89 


14 

1 


1599 


16.09 


16.20 


16.30 


16.41 


16.51 


16.62 


16-73 


16.84 


16.95 


15 


17.06 


17.17 


17.28 


17-39 


17-50 


17.61 


17-73 


17.84 


17.96 


18.07 


i6 


18.19 


18.30 


18.42 


18.54 


18.66 


18.78 


18.90 


19.02 


19.14 


19.26 


17 


1938 


19.51 


19-63 


19.76 


19.88 


20.01 


20.13 


20.26 


20.39 


20.52 


i8 


20.65 


20.78 


20.91 


21.04 


21.17 


21.31 


21.44 


21.58 


21.71 


21.85 


19 


21.98 


22.12 


22.26 


22.40 


22.54 


22.68 


22.82 


22.96 


23.11 


23-25 


20 


23.40 


23.54 


23-69 


23.83 


23-98 


24.13 


24.28 


24-43 


24.58 


24-73 


21 


24.88 


25.04 


25-19 


25-35 


25-50 


25-66 


25.82 


25.98 


26.14 


26.30 


22 


26.46 


26.62 


26.78 


26.94 


27.11 


27.27 


27.44 


27.61 


27.78 


27.94 


23 


28.11 


28.28 


28.46 


28.63 


28.80 


28.98 


29-15 


29-33 


29.51 


29.68 


24 


29.86 


30.04 


30.22 


30-40 


30.59 


30.77 


30-96 


31-14 


31.33 


31-51 


25 


31.70 


31-89 


32-08 


32.28 


32.47 


32.66 


32-86 


33-05 


33.25 


33-45 


26 


3364 


33-84 


34-04 


34-25 


34.45 


34-65 


34.86 


35-06 


35.27 


35-48 


2-] 


3569 


35-90 


36.11 


36.32 


36.53 


36.75 


36.96 


37-18 


37.40 


37-62 


28 


37-84 


38.06 


38.28 


38.50 


38.73 


38.95 


39.18 


39-41 


39-64 


39-87 


29 


40.10 


40.33 


40.56 


40.80 


41.04 


41.27 


41-51 


41-75 


41.99 


42-23 


30 


42.48 


42.72 


42.97 


43-21 


43-46 


43-71 


4396 


44-21 


44-47 


44.72 


31 


44.98 


45-23 


45-49 


45-75 


46.01 


46.27 


46-54 


46.80 


47.07 


47-33 


32 


47.60 


47.87 


48.14 


48.42 


48.69 


48.97 


49-24 


49-52 


49.80 


50.08 


33 


50.36 


50.65 


50.93 


51.22 


51-50 


51-79 


52-08 


52-37 


52.67 


52.96 


34 


53-26 


53-56 


53-85 


54-15 


54-46 


54-76 


55-06 


55-37 


55-68 


55.99 


35 


56.30 


56.61 


56.92 


57.24 


57-56 


57-87 


58.19 


58.51 


58.84 


59.16 


36 


59-49 


59.81 


60.14 


60.47 


60.81 


61.14 


61.47 


61.81 


62.15 


62.49 


37 


62.83 


63-17 


63.52 


63.86 


64.21 


64-56 


64.91 


65.27 


65.62 


65.98 


38 


66.34 


66.69 


67.06 


67.42 


67.78 


68.15 


68.52 


68.89 


69.26 


69.63 


39 


70.01 


70.38 


70.76 


71.14 


71-53 


71.91 


72.30 


72.68 


73-07 


73.46 


40 


73.86 


74.25 


74.65 


75-04 


75-44 


75-85 


76.25 


76.66 


77.06 


77-47 


41 


77.88 


78.30 


78.71 


79-13 


79-55 


79-97 


80.39 


80.81 


81.24 


81.67 


42 


82.10 


82.53 


82.97 


83-40 


83-84 


84.28 


84.72 


85-17 


85-61 


86.06 


43 


86.51 


86.96 


87.42 


87-87 


88.33 


88.79 


89.26 


89.72 


90.19 


90.66 


44 


91.13 


91.60 


92.07 


92-55 


9303 


93-51 


93-99 


94-48 


94-97 


95-46 



Smithsonian Tables 



175 



Table 80. 



WEIGHT OF A CUBIC FOOT OF SATURATED VAPOR. 

ENGLISH MEASURES. 



Temper- 
ature. 


Grains 


Temper- 
ature. 


.0 


.5 


Tempera- 
ature. 


.0 


.2 


.4 


.6 


.8 


F. 


F. 


Grains 


Grains 


F. 


Grains 


Grains 


Grains 


Grains 


Grains 


-30° 


O.OQS 


+20° 


1.244 


1-273 


+70° 


8.066 


8.117 


8.170 


8.223 


8.276 


29 


O.IOO 


21 


1.301 


1-332 


71 


8.329 


8.383 


8.437 


8.491 


8.546 


28 


0.106 


22 


1.362 


1-393 


72 


8.600 


8.656 


8.711 


8.766 


8.823 


27 


O.II2 


23 


1.425 


1-457 


73 


8.879 


8.936 


8.992 


9.050 


9.107 


26 


O.II9 


24 


1.490 


1.524 


74 


9.165 


9.223 


9.281 


9-341 


9.400 


-25 


0.126 


+25 


1.558 


1-593 


+ 75 


9.460 


9-519 


9-579 


9.640 


9.700 


24 


0.134 


26 


1.629 


1.666 


76 


9.761 


9.823 


9-885 


9-947 


10.009 


23 


O.I4I 


27 


1.703 


1. 741 


77 


10.072 


10.135 


10.199 


10.263 


10.327 


22 


0.150 


28 


1.779 


1.819 


78 


10.392 


10.457 


10.521 


10.587 


10.653 


21 


0.158 


29 


1.859 


1.900 


79 


10.720 


10.785 


10.853 


10.921 


10.987 


-20 


0.167 


+30 


1.942 


1.984 


+80 


11.056 


II. 124 


1 1. 193 


11.262 


11-331 


19 


0.176 


31 


2.028 


2.072 


81 


1 1. 401 


11.471 


11.542 


11.613 


11.685 


18 


0.187 


i2 


2. 118 


2.159 


82 


11.756 


11.828 


1 1 .900 


11.974 


12.047 


17 


0.197 


2,2, 


2.200 


2.242 


83 


12. 121 


12.195 


12.269 


12.344 


12.419 


16 


0.208 


34 


2.286 


2.330 


84 


12.494 


12.570 


12.646 


12.723 


12.800 


-15 


0.220 


+35 


2.375 


2.420 


+85 


12.878 


12.956 


13-034 


13.113 


13.192 


14 


0.232 


36 


2.466 


2-513 


86 


13.272 


13-351 


13-432 


13-512 


13-594 


13 


0.244 


37 


2.560 


2.609 


87 


13.676 


13-758 


13.840 


13-923 


14.006 


12 


0.258 


2,?' 


2.658 


2.708 


88 


14.090 


14.174 


14.258 


14.344 


14.429 


II 


0.272 


39 


2.759 


2.810 


89 


14.515 


14.601 


14.689 


14.776 


14.864 


-10 


0.286 


+40 


2.863 


2.916 


+90 


14.951 


15.040 


15.129 


15.219 


15-309 


Q 


0.302 


41 


2.970 


3.026 


91 


15.400 


15.490 


15.581 


15-673 


15.766 


S 


0.318 


42 


3.082 


3-138 


92 


15-858 


15.951 


16.045 


16.139 


16.234 


7 


0-335 


43 


3.196 


3-254 


93 


16.328 


16.423 


16.520 


16.616 


16.713 


6 


0-3S3 


44 


3-315 


3-374 


94 


16.810 


16.909 


17.007 


17.106 


17.205 


- 5 


0.371 


+45 


3436 


3-499 


+95 


17.305 


17.406 


17.506 


17.607 


17.709 


4 


0.391 


46 


3.563 


3.627 


96 


17.812 


17.914 


18.018 


18.121 


18.226 


3 


0.41 1 


47 


3.693 


3.759 


97 


18.330 


18.436 


18.542 


18.648 


18.755 


2 


0.433 


48 


3.828 


3-895 


98 


18.863 


18.971 


19.079 


19.188 


19.298 


- I 


0.45 s 


49 


3-965 


4.036 


99 


19.407 


19.518 


19.629 


19.741 


19-853 


±0 


0.470 


+50 


4.108 


4. 181 


+100 


19.966 


20.079 


20.193 


20.307 


20.422 


+ I 


0.503 


51 


4.255 


4.331 


lOI 


20.538 


20.654 


20.770 


20.887 


2 1 .005 


2 


0.529 


52 


4.407 


4.485 


102 


21.123 


21.242 


21.362 


21.481 


21.602 


3 


0.556 


S2, 


4.564 


4.644 


103 


21.723 


21.845 


21.967 


22.090 


22.213 


4 


0.584 


54 


4-725 


4.807 


104 


22.337 


22.462 


22.588 


22.714 


22.839 


5 


0.613 


+55 


4.891 


4.976 


+105 


22.966 


23.095 


23.223 


23-351 


23.481 


6 


0.644 


56 


5.062 


5-149 


106 


23.611 


23.742 


23-873 


24.005 


24.138 


7 


0.676 


57 


5-238 


5-328 


107 


24.271 


24.405 


24-539 


24.673 


24.809 


8 


0.709 


58 


5-420 


5-513 


108 


24.946 


25.082 


25.220 


25.358 


25.497 


9 


0.744 


59 


5-607 


5-703 


109 


25.636 


25.776 


25-917 


26.058 


26.201 


10 


0.780 


+60 


5.800 


5-899 


+ 110 


26.343 


26.486 


26.630 


26.775 


26.920 


II 


0.818 


61 


5-099 


6.099 


III 


27.066 


27.213 


27.360 


27.508 


27.657 


12 


0.858 


62 


6.203 


6.306 


112 


27.807 


27.956 


28.107 


28.259 


28.411 


13 


0.900 


63 


6.413 


6.521 


113 


28.563 


28.717 


28.871 


29.026 


29.181 


14 


0.943 


64 


6.630 


6.740 


114 


29-338 


29-495 


29-653 


29.812 


29.970 


15 


0.988 


+65 


6.852 


6.966 


+ 115 


30.130 


30.291 


30.452 


30.614 


30.777 


16 


1.035 


66 


7.082 


7.198 


116 


30.940 


31.104 


31.270 


31-435 


31.601 


17 


1.084 


67 


7-317 


7.437 


117 


31-768 


31.937 


32.106 


32-274 


32.445 


18 


I-I3S 


68 


7.560 


7.683 


118 


32.616 


32.787 


32.960 


32,--^2,2, 


33-307 


+ 10 


1. 189 


+69 


7.809 


7-937 


+119 


33.482 


33.657 


33-834 


34.010 


34.189 



Smithsonian Tables. 



176 



Table 81 



WEIGHT OF A CUBIC METER OF SATURATED VAPOR OVER ICE. 

METRIC MEASURES 



Tempera- 




Tempera- 






Tempera- 




Tempera- 




Tempera- 




ture 




ture 






ture 




ture 




ture 




C. 


grams 


C. 




grams 


C. 


grams 


C. 


grams 


C. 


grams 


-70° 


0.0028 


-60° 


O.O] 


09 


-50°.0 


0.0381 


-45°.0 


0.068 r 


-40°.0 


0.120 


69 


0.0032 


59 


0.01 


24 


49-5 


0.0398 


44-5 


0.0721 


39-5 


0.126 


68 


0.0037 


58 


0.0 


42 


49-0 


0.0424 


44-0 


0.0763 


39.0 


0-133 


67 


0.0042 


57 


O.O] 


61 


48.5 


0.0451 


43-5 


0.0808 


38.5 


O.141 


66 


0.0049 


56 


O.O] 


83 


48.0 


0.0479 


43-0 


0.0854 


38.0 


0.149 


-65° 


0.0056 


-55° 


0.0207 


-47°.5 


0.0508 


-42°.5 


0.0904 


-37°.5 


0-157 


64 


0.0064 


54 


0.0234 


4 


7.0 


0.0538 


42.0 


0.0957 


37.0 


0.166 


63 


0.0073 


53 


0.02 


65 


46.5 


0.0572 


41-5 


O.IOI 


36.5 


0-175 


62 


0.0084 


52 


0.0300 


46.0 


0.0606 


41.0 


0.107 


36.0 


0.184 


61 


0.0096 


5] 




0.0338 


45-5 


0.0643 


40.5 


0.II3 


35-5 


0.194 


Temp. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


C. 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


-35° 


0.205 


0.203 


0.200 


0.198 


0.196 


0.194 


0.192 


0.190 


0.188 


0.186 


34 


0.227 


0.225 


0.223 


0.220 


0.218 


0.216 


0.214 


0.2II 


0.209 


0.207 


33 


0.252 


0.250 


0.247 


0.244 


0.242 


0.239 


0.237 


0.234 


0.232 


0.230 


32 


0.280 


0.277 


0.274 


0.271 


0.268 


0.265 


0.263 


0.260 


0.258 


0.255 


31 


0.309 


0.306 


0.303 


0.300 


0.297 


0.294 


0.291 


0.288 


0.285 


0.282 


-30° 


0.342 


0.339 


0.335 


0.332 


0.329 


0.325 


0.322 


0.319 


0.316 


0.313 


29 


0.378 


0.374 


0.371 


0.367 


0.364 


0.360 


0.356 


0.353 


0.349 


0.346 


28 


0.418 


0.414 


0.410 


0.405 


0.401 


0.398 


0.394 


0.390 


0.386 


0.382 


27 


0.461 


0.456 


0.452 


0.447 


0.443 


0.439 


0.434 


0.430 


0.426 


0.422 


26 


0.508 


0.503 


0.498 


0.493 


0.488 


0.484 


0.479 


0.474 


0.470 


0.465 


-25° 


0.559 


0.554 


0.549 


0.543 


0.538 


0.533 


0.528 


0.523 


0.518 


0.513 


24 


0.615 


0.610 


0.604 


0.598 


0.592 


0.587 


0.581 


0.576 


0.570 


0.565 


23 


0.677 


0.670 


0.664 


0.658 


0.652 


0.645 


0.639 


0.633 


0.627 


0.621 


22 


0.743 


0.736 


0.729 


0.723 


0.716 


0.709 


0.702 


0.696 


0.689 


0.683 


21 


0.816 


0.808 


0.801 


0.793 


0.786 


0.779 


0.772 


0.764 


0.757 


0.750 


-20° 


0.894 


0.886 


0.878 


0.870 


0.862 


0.854 


0.846 


0.839 


0.831 


0.823 


19 


0.980 


0.972 


0.963 


0.954 


0.945 


0.936 


0.928 


0.920 


0.91 1 


0.903 


18 


1.073 


1.064 


1.054 


1.045 


1 .035 


1.026 


1.017 


1.008 


0.998 


0.989 


17 


1. 174 


1. 164 


I-I54 


I.I43 


I.I33 


1. 123 


1. 113 


1. 103 


1.093 


1.083 


16 


1.284 


1.273 


1. 261 


1.250 


1.239 


1.228 


I.217 


1.206 


1. 196 


1. 185 


-15° 


1-403 


1.390 


1-378 


1.366 


1-354 


1-342 


1.330 


1-319 


1.307 


1-295 


14 


I-53I 


1.518 


1-505 


1.492 


1-478 


1.466 


1.453 


1.440 


1.428 


I-415 


13 


1.671 I 1.656 


1. 64 1 


1.627 


1.613 


1-599 


1.585 


1-572 


1-558 


1-545 


12 


1.820 ; 1.805 


1.789 


1.774 


1.759 


1-744 


1.729 


1. 714 


1.699 


1.685 


II 


1.983 1.966 


1.949 


1-933 


1.916 


1.900 


1.884 


1.868 


1.852 


1.836 


-10° 


2.158 : 2.140 


2.122 


2.104 


2.086 


2.069 


2.051 


2.034 


2.016 


2.000 


9 


2.347 i 2.327 


2.308 


2.289 


2.270 


2.251 


2.232 


2.213 


2.194 


2.176 


8 


2.551 2.530 


2.509 


2.488 


2.467 


2.447 


2.426 


2.406 


2.386 


2.366 


7 


2.770 ! 2.748 


2.725 


2.703 


2.680 


2.658 


2.636 


2.615 


2.593 


2.572 


6 


3.006 1 2.982 


2.958 


2.934 


2.910 


2.886 


2.863 


2.839 


2.8r6 


2.793 


- 5° 


3.261 3.234 


3-208 


3.182 


3-157 


3.131 


3.106 


3.081 


3-056 


3031 


4 


3-534 3-506 


3-478 


3-450 


3.422 


3-395 


3-368 


3-341 


3-314 


3-287 


3 


3.828 3.798 


3-767 


3-737 


3.708 


3.678 


3649 


3.620 


3-591 


3-562 


2 


4.144 


4.1 1 1 


4.078 


4.046 


4.015 


3-983 


3-951 


3.920 


3.889 


3-858 


I 


4.482 


4-447 


4.412 


4.378 


4-344 


4.310 


4.276 


4.242 


4.209 


4.176 


- 0° 


4.847 


4.809 


4-771 


4-734 


4.697 


4.661 


4.624 


4-588 


4-553 


4-517 



Smithsonian Tables 



177 



Table 81. 

WEIGHT OF A CUBIC METER OF SATURATED VAPOR OVER WATER. 

METRIC MEASURES 



Temp. 


.0 


.1 


.2 


.3 


.4 


.5 


.6 


.7 


.8 


.9 


C. 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


grams 


+ 0° 


4.847 


4.881 


4.914 


4.948 


4.982 


5.017 


5-051 


5.086 


5.121 


5-157 


I 


5.192 


5.228 


5-264 


5-300 


5-336 


5-373 


5.410 


5-447 


5-483 


5-521 


2 


5-559 


5-596 


5-634 


5-673 


5-711 


5-750 


5-789 


5.828 


5.868 


5-908 


3 


5-947 


5.988 


6.028 


6.068 


6. no 


6.151 


6.192 


6.234 


6.275 


6.318 


4 


6.360 


6.402 


6.445 


6.488 


6.532 


6-575 


6.619 


6.664 


6.708 


6.753 


+ 5 


6.797 


6.842 


6.888 


6-934 


6.979 


7.025 


7-072 


7.119 


7.166 


7.213 


6 


7.261 


7-309 


7-357 


7-405 


7-453 


7-502 


7-552 


7.601 


7.651 


7.701 


7 


7-751 


7.802 


7-853 


7-904 


7-956 


8.007 


8.059 


8. 112 


8.164 


8.217 


8 


8.271 


8.324 


8.378 


8-432 


8.487 


8.542 


8-597 


8.652 


8.708 


8.764 


9 


8.821 


8.877 


8-934 


8.991 


9-049 


9.106 


9-165 


9.223 


9.282 


9.341 


+ 10 


9.401 


9.461 


9-521 


9-582 


9-643 


9-704 


9-765 


9.827 


9.889 


9952 


II 


10.015 


10.078 


10.142 


10.205 


10.270 


10.334 


10.400 


10.465 


10.530 


10.597 


12 


10.664 


10.730 


10.797 


10.865 


10.932 


II. 001 


1 1 .069 


11-138 


11.208 


11.278 


13 


11.348 


II.418 


11.489 


11.561 


11.632 


11.704 


11.777 


11.850 


11.922 


11.997 


14 


12.070 


12.144 


12.219 


12.295 


12.370 


12.446 


12.523 


12.600 


12.677 


12.754 


+ 15 


12.832 


12.911 


12.990 


13.068 


13.148 


13.229 


13-309 


13-390 


13-472 


13-553 


i6 


13-635 


13.718 


13.801 


13-885 


13-969 


14-053 


14-139 


14.224 


14-309 


14-395 


17 


14.482 


14-569 


14-657 


14.744 


14-833 


14.922 


1 5-01 1 


15.101 


15.191 


15.282 


i8 


15-373 


15-465 


15-557 


15-650 


15-743 


15-836 


15.931 


16.025 


16. 121 


16.216 


19 


16.311 


16.409 


16.505 


16.603 


16.701 


16.799 


16.898 


16.998 


17.097 


17.198 


+20 


17.300 


17-401 


17-503 


17.606 


17-708 


17.812 


17.917 


18.021 


18.126 


18.232 


21 


18.338 


18.445 


18.553 


18.660 


18.768 


18.878 


18.987 


19.097 


19.207 


19-319 


22 


19-430 


19-542 


19-655 


19.769 


19.882 


19.996 


20.112 


20.227 


20.343 


20.461 


23 


20.578 


20.695 


20.814 


20.933 


21.053 


21.173 


21.295 


21.416 


21.538 


21.660 


24 


21.783 


21.907 


22.0^2 


22.157 


22.282 


22.409 


22.536 


22.663 


22.791 


22.920 


+25 


23.049 


23.179 


23.310 


23.442 


23.573 


23.706 


23-839 


23-973 


24.107 


24.242 


26 


24-378 


24-514 


24.651 


24.790 


24-929 


25.066 


25.206 


25-346 


25.488 


25-629 


27 


25-771 


25-915 


26.058 


26.203 


26.348 


26.494 


26.641 


26.787 


26.936 


27.084 


28 


27-234 


27-384 


27-534 


27.686 


27-837 


27-990 


28.143 


28.298 


28.453 


28.609 


29 


28.765 


28.923 


29.081 


29.239 


29.399 


29-559 


29.720 


29.881 


30.044 


30.207 


+30 


30-371 


30.535 


30.701 


30.867 


31-034 


31.202 


31-371 


31-540 


31.710 


31.880 


31 


32.052 


32.225 


32.398 


32.572 


32-747 


32-923 


33.100 


33-277 


33-454 


33-633 


32 


33-812 


33-993 


34-175 


34.356 


34-540 


34-723 


34-909 


35094 


35-280 


35-467 


33 


35-656 


35-844 


36.034 


36.224 


36.416 


36.609 


36.801 


36.995 


37-190 


37-386 


34 


37-583 


37-780 


37.979 


38.178 


38.378 


38-579 


38.782 


38-984 


39-187 


39-395 


+35 


39-599 


39-805 


40.013 


40.221 


40.430 


40.640 


40.851 


41.064 


41.277 


41.491 


36 


41.706 


41.921 


42-139 


42.356 


42.575 


42-795 


43-015 


43-237 


43-459 


43-683 


37 


43.908 


44-134 


44-360 


44.587 


44.815 


45.046 


45-277 


45-507 


45-740 


45-973 


38 


46.208 


46.443 


46.680 


46.918 


47-156 


47-396 


47.636 


47.878 


48.121 


48.365 


39 


48.609 


48.855 


49.103 


49.350 


49.600 


49-850 


50.101 


50.353 


50.606 


50.861 


+40 


51-117 


51-373 


51-631 


51.890 


52-150 


52.410 


52.673 


52.936 


53-200 


53-466 



Smithsonian Tables 



178 



HYGROMETRICAL TABLES. 



Reduction of psychromctric observations — English measures. 

Values oi e = e' - 0.000367 B (t - t') (i + ^ ~ '^^ j . . Table 82 

Relative humidity — Temperature Fahrenheit .... Table 83 

Reduction of psychromctric observations — Metric Measures, 

Values oi e = e' — 0.000660 B {t — t') (i + 0.00115 t') . Table 84 

Relative humidity — Temperature Centigrade .... Table 85 

Rate of decrease of vapor pressure with altitude Table 86 

Reduction of snowfall measurements. 

Depth of water corresponding to the weight of a cylindrical 

snow core 2.655 inches in diameter Table 87 

Depth of water corresponding to the weight of snow (or rain) 

collected in an 8-inch gage Table 88 

Quantity of rainfall corresponding to given depths . . . Table 89 



Table 82. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 

/ /' - S2\ 

Values oi e = e' — 0.000367 B {I — l' j I i -\ ^— ) 

\ 1571 / 

Pressure of Saturated Aqueous Vapor, c. 



Tempera- 
ture. 





1 


2 


3 


4 


5 


6 


7 


8 


9 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


-60' 


.0010 




















50 


20 


.0018 


.0017 


.0016 


.0015 


.0014 j 


.0013 


.0012 


.0011 


.0011 


40 


38 


36 


33 


31 


29 


28 


26 


24 


23 


21 


30 


71 


66 


62 


59 


55 


52 


49 


46 


43 


40 


20 


.0127 


.0120 


•0113 


.0107 


.OIOJ 


•009 s 


.0090 


.0084 


.0080 


.0075 








f = c' — 


0.0003C 


7 Bit- 


/') (i + 


t' -32 
1571 


) 














B 


= 30.0 inchis 










/' 










/ 


- i' 










.0 


.2 


.4 


.6 


.8 


1.0 


1.2 


1.4 


1.6 


1.8 




Inches. 


Inches. 


Inches. 


Inches. 


Inches, 


Inches, 


Inches. 


Inches. 


Inches. 


Inches. 


-20° 


.0127 


0106 


.0085 


.0063 


.0042 


.0021 










10 


135 


113 


92 


71 


49 


28 


.0007 








18 


143 


121 


.0100 


79 


57 


36 


.0015 








17 


151 


130 


108 


87 


66 


44 


23 


.0002 






16 


160 


138 


117 


96 


74 


53 


32 


.0010 






15 


169 


148 


126 


.0105 


84 


62 


41 


19 






14 


179 


157 


136 


115 


93 


72 


50 


29 


.0008 




13 


189 


168 


146 


125 


.0103 


82 


61 


39 


.0018 




12 


200 


178 


157 


136 


114 


93 


71 


50 


29 


.0007 


II 


211 


190 


168 


147 


125 


.0104 


83 


61 


40 


.0018 


10 


-3 


202 


180 


159 


137 


116 


94 


73 


52 


30 


9 


236 


214 


193 


171 


150 


128 


.0107 


85 


64 


43 


8 


249 


227 


206 


184 


163 


141 


120 


98 


77 


56 


7 


263 


241 


220 


198 


177 


155 


134 


.0112 


91 


69 


6 


277 


256 


234 


213 


191 


170 


148 


127 


.0105 


84 


5 


292 


271 


249 


228 


206 


185 


163 


142 


120 


.0099 


4 


308 


287 


265 


244 


222 


201 


179 


158 


136 


.0115 


3 


325 


304 


282 


261 


239 


218 


196 


175 


153 


132 


2 


343 


321 


300 


278 


257 


23s 


214 


192 


171 


149 


- I 


361 


340 


318 


297 


275 


254 


232 


210 


189 


167 


± 


381 


359 


338 


316 


294 


273 


251 


230 


208 


187 


+ I 


401 


380 


358 


337 


31S 


293 


272 


250 


229 


207 


2 


423 


401 


379 


358 


336 


315 


293 


271 


250 


228 


3 


445 


423 


402 


380 


359 


337 


315 


294 


272 


250 


4 


468 


447 


425 


404 


382 


360 


339 


317 


295 


274 


5 


493 


471 


450 


428 


407 


385 


363 


342 


320 


298 


6 


519 


497 


476 


454 


432 


411 


389 


367 


346 


324 


7 


546 


524 


503 


481 


459 


438 


416 


394 


373 


351 


8 


574 


552 


531 


509 


487 


466 


444 


422 


401 


379 


9 


604 


582 


560 


539 


517 


495 


474 


452 


430 


408 


10 


■0635 


.0613 


•0591 


.0569 


•0548 


.0526 


.0504 


.0483 


.0461 


•0439 


-20 1 

+ 10 f 


AcXAB 


+.0001 


+.0001 


+.0002 


+.0003 


+.0004 


+.0004 


+.0005 


+.0006 


+.0007 



























Smithsonian Tables. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 



Table 82. 













0"/ ^ \ 


" ^j \ 


^^ ' ^snJ 










B = 30.0 inches 






/' 


2.0 


2.2 


2.4 


t 
2.6 1 2.8 


- t' 
3.0 


3.2 


3.4 


3.6 


3.8 




F. 


Inches. 


Inches. 


! Inches. 


Inches. Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 




-10° 


.00 og 






















Q 


21 






















8 


34 


.0013 




















7 


48 


26 


.0005 


















6 


62 


41 


.0019 


















5 


77 


56 


34 


.0013 
















4 


93 


72 


SO 


29I .0007 














3 


.0110 


88 


67 


45 


.0024 


.0002 












2 


127 


.oro6 


84 


63 


41 


.0020 












— I 


146 


124 


.0103 


81 


60 


38 


.0016 










±0 


i6s 


144 


122 


.0100 


79 


57 


36 


.0014 








+ I 


i«5 


164 


142 


121 


99 


78 


56 


34 


.0013 






2 


207 


185 


ib3 


142 


.0120 


.0099 


77 


55 


34 


.0012 




3 


229 


207 


186 


164 


142 


.0121 


99 


78 


56 


34 




4 


252 


231 


209 


187 


166 


144 


.0122 


.0101 


79 


58 




5 


277 


255 


233 


212 


190 


168 


147 


125 


.0104 


82 




6 


302 


281 


259 


237 


216 


194 


172 


151 


129 


.0107 




7 


329 


308 


286 


264 


243 


221 


199 


178 


156 


134 




8 


357 


336 


314 


292 


271 


249 


227 


205 


184 


162 




9 


3«7 


3&5 


343 


322 


300 


278 


257 


235 


213 


191 




10 


.0417 


.0396 


•0374 


•0352 


•0331 


.0309 


.0287 


.0266 


.0244 


.0222 




;|0[a<xA5 


-I-.0007 


+.000S 


+.ooog 


+.0009 


+.0010 +.0011 


+.0012 


+.0012 


+.0013 


+.0014 




/' 


4.0 


4.2 1 4.4 


4.6 


4.8 


5.0 


5.2 


5.4 


5.6 


5.8 






Inches. 


Inches. Inches. 


Inches, Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 




3° 


.00 1 ? , 






















4 


36 


.0014 




















5 


60 


39 


.0017 


















6 


86! 


64 


42 


.002 1 1 
















7 


.0113J 


91 


69 


47 


.0026 


.0004 












8 


140 1 


.0119 97I 


75: 


54 


32 


.0010 










9 


170' 

1 


148 .0126 


.0105 


83 


61 

1 


40 


.0018 








10 


.0200 


.0170 .0157 


•0135 


.0114 


.0092 


.0070 


.0048 


.0027 


.0005 




+ 10 Ac X AS 


-.0014 - 


f.0015 +.0016 +.0017 - 

1 i 1 


f.oor7 - 


-.0018 4.0019 - 

1 i 


h.0020 - 


1 
I-.0020 

t 


+.0021 





Smithsonian Tables. 



I«I 



Table 82. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 

of c = c' - 0.000367 B{t - I') (i -f — _-^- j 
B ^= 30.0 inches 



Values 













i - i' 












' ~c 


).0 


1,0 


2,0 


3.0 


4,0 


5.0 


6.0 


7.0 


8.0 


9.0 


F. In 


ches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. In 


ches. 


Inches. 


Inches. 


10° Af: 


KAB 


+.0004 


+.0007 


+.001 1 


+.0014 


+.0018 


+.0022 +.C 


302 5 


+.0029 


+•0033 


10" 


063 


0-053 


0.042 


0.031 


0.020 


0.009 










II 


67 


56 


45 


34 


23 


.012 


0.002 








12 


70 


59 


48 


37 


27 


16 


5 








13 


74 


63 


52 


41 


30 


19 


8 








14 


77 


66 


56 


45 


34 


23 


.012 


.001 






15 


81 


70 


59 


49 


38 


27 


16 


5 






16 


85 


74 


63 


53 


42 


31 


20 


9 






17 


89 


79 


68 


57 


46 


35 


24 


.013 


0.002 




18 


94 


83 


72 


61 


SO 


39 


28 


18 


7 




19 


099 


88 


77 


66 


55 


44 


33 


22 


II 


0.000 


20 


103 


92 


81 


71 


60 


49 


38 


27 


16 


•005 


21 


108 


97 


86 


76 


65 


54 


43 


32 


21 


.010 


22 


114 


.103 


92 


81 


70 


59 


48 


37 


26 


15 


23 


119 


.108 


97 


86 


75 


64 


53 


42 


32 


21 


24 


125 


.114 


.103 


92 


81 


70 


59 


48 


37 


26 


25 


131 


.120 


.109 


98 


87 


76 


65 


54 


43 


32 


26 


137 


.126 


•115 


.104 


93 


82 


71 


60 


49 


38 


27 


143 


•133 


.122 


.III 


.100 


89 


78 


67 


56 


45 


28 


150 


•139 


.128 


.117 


.106 


95 


84 


73 


62 


51 


29 


157 


.146 


•135 


.124 


•113 


.102 


91 


80 


69 


58 


30 


165 


■154 


■ 143 


.132 


.121 


.110 


99 


88 


77 


66 


31 


172 


.161 


.150 


■139 


.128 


.117 


.106 


95 


84 


73 


32 


180 


.169 


• 158 


.147 


.136 


•125 


.114 


103 


92 


81 


33 


188 


.177 


.166 


•155 


.144 


•133 


.122 


III 


.100 


89 


34 


195 


.184 


•173 


.162 


•151 


.140 


.129 


118 


.107 


96 


35 


203 


.192 


.181 


.170 


•159 


.148 


•137 


126 


•115 


.104 


36 


212 


.201 


.190 


.179 


.168 


•157 


•145 


134 


.123 


.112 


37 


220 


.209 


.198 


.187 


.176 


■ i6s 


• 154 


143 


.132 


.121 


38 


229 


.218 


.207 


.196 


■ 185 


.174 


.163 


152 


.141 


.130 


39 


238 


.227 


.216 


.205 


.194 


.183 


.172 


161 


.150 


•139 


40 


248 


•237 


.226 


.215 


• 203 


.192 


.181 


170 


•159 


.148 


41 


258 


.246 


•235 


.224 


•213 


.202 


.191 


180 


.169 


■ 158 


42 


268 


•257 


.246 


•234 


.223 


.212 


.201 


190 


.179 


.168 


43 


278 


.267 


• 256 


• 245 


•234 


• 223 


.212 


201 


.190 


.178 


44 


289 


.278 


.267 


.256 


•245 


■234 


■223 


211 


.200 


.189 


45 


300 


.289 


.278 


.267 


.256 


•245 


•234 


223 


.211 


.200 


46 


312 


.301 


.290 


•279 


.268 


.256 


•245 


234 


•223 


.212 


47 


324 


•313 


.302 


.291 


.280 


.268 


•257 


246 


•235 


.224 


48 


336 


•325 


•314 


•303 


.292 


.281 


.270 


259 


.248 


.236 


49 


349 


•338 


•327 


.316 


•305 


.294 


• 283 


271 


.260 


.249 


50 


363 


•351 


•340 


•329 


.318 


•307 


.296 


285 


•274 


.262 


51 


376 


.365 


•354 


•343 


•332 


.321 


•309 


298 


.287 


.276 


52 


390 


■379 


.368 


■357 


•346 


•335 


•324 


312 


•301 


.290 


53 


405 


•394 


•383 


•372 


.361 


•349 


•338 


327 


•316 


•305 


54 


420 


.409 


•398 


.387 


•376 


•364 


•353 


342 


■33^ 


.320 


55 


436 


•425 


.414 


.402 


•391 


.380 


•369 


358 


•347 


•335 


56 


452 


.441 


•430 


.419 


.407 


•396 


•385 


374 


•363 


•352 


57 


469 


.458 


.446 


•435 


•424 


•413 


.402 


390 


•379 


■368 


58 


486 


•475 


.464 


•452 


•441 


•430 


.419 


408 


•396 


■385 


59 


504 


•493 


.481 


.470 


■459 


■448 


•437 


425 


.414 


•403 


60 


522 


0.511 


0.500 


0.488 


0.477 


0.466 


0.455 0. 


444 


0.432 


0.421 


60 ^e> 


<AB 


+.0004 


+.0007 


+.001 1 


+.0015 


+.0019 


+.0022 +. 


0026 


+.0030 


+•0034 1 



Smithsonian Tables. 



182 



Table 82. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 





V cllU 


cs ui e 




3.000307 


D \l. — 


' K' 


^ 157 


I J 












B=3 


0.00 












/' 










/ - 


t' 










10 


11 


12 


13 


14 


15 


16 ! 


17 


18 


19 




F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 




30°AcXAB 


+.0037 


+.0040 


+.0044 


+.0048 


+.0051 


+•0055 


+.0059 


+.0062 


+.0066 


+.0070 




22° 


0.004 






















23 


.010 






















24 


15 






















25 


21 


O.OIO 




















26 


27 


16 


0.005 


















27 


34 


23 


.012 


O.OOI 
















28 


40 


29 


18 


7 
















29 


47 


36 


25 


.014 


0.003 














30 


55 


44 


33 


22 


.011 


0.000 












31 


62 


51 


40 


29 


18 


.007 












32 


70 


59 


48 


37 


26 


.015 


0.004 










33 


78 


67 


55 


44 


33 


22 


II 


0.000 








34 


85 


74 


63 


52 


41 


30 


19 


.008 








35 


93 


82 


71 


60 


49 


38 


27 


.016 


0.005 






36 


.101 


90 


79 


68 


57 


46 


35 


24 


.013 


0.002 




37 


.no 


99 


88 


77 


66 


55 


43 


32 


21 


.010 




38 


.119 


.108 


96 


8S 


74 


63 


52 


41 


30 


19 




39 


.128 


.117 


•105 


94 


83 


72 


61 


50 


39 


28 




40 


•137 


.126 


•115 


.104 


93 


82 


71 


60 


49 


37 




41 


.147 


.136 


•125 


.114 


.103 


91 


80 


69 


58 


47 




42 


• 157 


.146 


•135 


.124 


•113 


.101 


90 


79 


68 


57 




43 


.167 


.156 


• 145 


.134 


.123 


.112 


.101 


90 


79 


68 




44 


.178 


.167 


.156 


• 145 


•134 


• 123 


.112 


.100 


89 


78 




45 


.189 


.178 


.167 


.156 


.145 


• 134 


.123 


.112 


.100 


89 




46 


.201 


.190 


.179 


.168 


.156 


• 145 


•134 


.123 


.112 


.101 




47 


.213 


.202 


.191 


.180 


.168 


• 157 


.146 


.135 


. .124 


•113 




48 


.225 


.214 


.203 


.192 


.181 


.170 


•159 


.147 


.136 


•125 




49 


.238 


.227 


.216 


.205 


•193 


.182 


.171 


.160 


.149 


.138 




50 


.251 


.240 


.229 


.218 


.207 


.196 


.184 


•173 


.162 


• 151 




51 


.265 


•254 


• 243 


.231 


.220 


.209 


.198 


.187 


.176 


• 165 




52 


.279 


.268 


• 257 


.246 


•234 


.223 


.2x2 


.201 


.190 


.179 




53 


.294 


.282 


.271 


.260 


.249 


.238 


.227 


.216 


.204 


• 193 




54 


•309 


.297 


.286 


.275 


.264 


.253 


.242 


.231 


.219 


.208 




55 


•324 


•313 


.302 


.291 


.280 


.268 


•257 


.246 


• 235 


.224 




56 


•340 


•329 


•318 


•307 


.296 


.285 


•273 


.262 


■ 251 


.240 
.256 




57 


■357 


.346 


•334 


•323 


.312 


.301 


.290 


.279 


.267 




58 


•374 


.363 


•352 


•340 


•329 


.318 


•307 


.296 


.284 


• 273 




59 


•392 


.381 


•369 


•358 


•347 


•336 


•325 


•313 


.302 


.291 




60 


0.410 


0.399 


0.388 


0.376 


0^365 


0.354 


0.343 


0.331 


0.320 


0.309 




60 Aex A5 


+ •0037 


+.0041 


+.0045 


+.0049 


+.0052 


+.0056 


+.0060 


4-.0064 +.0067 


+.0071 





























Smithsonian Tables. 



183 



Table 82. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 



Values of i 



c' — o.cxx»367 B (t —t') ( I + 
B = 30.00 



157 



r) 



t' 


i-l' 


20 


21 


22 


23 


24 


25 


26 


27 


28 


29 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


40°AcXAjB 


+.0074 


+.0077 


+.0081 


+.0085 


+.0089 


+.0092 


+.0096 


+.0100 


+.0103 


+.0107 


38° 


0.008 




















39 


.017 


0.006 


















40 


26 


.015 


0.004 
















41 


36 


25 


.014 


0.003 














42 


46 


35 


24 


.013 


0.002 












43 


56 


45 


34 


23 


.012 


O.OOI 










44 


67 


56 


45 


34 


23 


.012 


O.OOI 








45 


78 


67 


56 


45 


34 


23 


.012 


O.OOI 






46 


90 


70 


68 


57 


45 


34 


23 


.012 


O.OOI 




47 


.102 


91 


79 


68 


57 


46 


35 


24 


13 


0.002 


48 


.114 


.103 


92 


Si 


70 


58 


47 


36 


25 


.014 


40 


.127 


.116 


.104 


93 


82 


71 


60 


49 


38 


27 


50 


.140 


.129 


.118 


.106 


95 


84 


73 


62 


51 


40 


51 


•153 


.142 


•131 


.120 


.109 


08 


87 


75 


64 


53 


52 


.167 


.156 


•145 


.134 


.123 


.112 


.101 


89 


78 


67 


53 


.182 


.171 


.160 


.149 


•137 


.126 




115 


.104 


93 


82 


54 


.197 


.186 


•17s 


.164 


.152 


.141 




130 


.119 


.108 


97 


55 


.212 


.201 


.190 


.179 


.168 


■157 




145 


•134 


.123 


.112 


56 


.229 


.218 


.206 


•195 


.184 


•173 




162 


.150 


•139 


.128 


57 


•245 


•234 


.223 


.211 


.200 


.189 




178 


.167 


.156 


.144 


58 


.262 


■ 251 


.240 


.228 


.217 


.206 




195 


.184 


•173 


.161 


59 


.280 


.269 


•257 


.246 


•235 


.224 




213 


.201 


.190 


.179 


60 


0.298 


0.287 


0.275 


0.264 


0.253 


0.242 





231 


0.219 


0.208 


0.197 


60 Af X ^B 


+.0075 


+.0078 


+.0082 


+.0086 


+.0090 


+.0093 


+ 


0097 


+.0101 


+.0105 


+.0108 


I' 


t-i' II 


30 


31 32 


33 


34 


35 


36 


37 


38 


39 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


50°AexA5 


+.0111 


+.OIIS 


+.0119 


+.0122 


+.0126 


+.0130 


+•0134 


+.0137 


+.0141 


+.0145 


48° 


0.003 




















49 


.015 


.004 


















50 


29 


.017 


0.006 
















51 


42 


31 


.020 


0.009 














52 


56 


45 


34 


•023 


0.0 1 1 


0.000 










53 


70 


59 


48 


37 


26 


.015 


0.004 








54 


85 


74 


63 


52 


41 


30 


.018 


0.007 






55 


.101 


90 ! 78 


67 


56 


45 


34 


■023 


O.OII 


0.000 


56 


.117 


.106 


95 


83 


72 


61 


50 


39 


28 


.016 


57 


•133 


.122 


.III 


.100 


88 


77 


66 


55 


44 


32 


58 


.150 


•139 


.128 


.117 


.105 


94 


83 


72 


61 


49 


59 


.168 


•157 


•145 


•134 


.123 


.112 


.101 


89 


78 


67 


60 


0.186 


0.175 


0.163 


0.152 


0.141 


0.130 


0.119 


0.107 


0.096 


0.085 


60 Ac X AS 


+.0112 


+.01 16 


+.0120 


+.0123 


+.0127 


+.013 1 


+.0134 


+.0138 


+.0142 


+.0146 


/' 


t-l> II 


40 


41 


42 43 


44 


45 


46 








F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 








56° 


0.00s 




















57 


.021 


O.OIO 


















58 


38 


27 


0.016 


0.005 














50 


56 


45 


33 


.022 


O.OII 


0.000 










60 


0.074 


0.063 


0.051 


0.040 


0.029 


0.018 


0.007 








60 At; X AB 


+.0149 


+•0153 


+.0157 


+.0161 


+.0164 


+.0168 


+.0172 









Smithsonian Tables. 



184 





REDUCTION OF 


PSYCHROMETRIC OBSERVATION. ''"'^^'-^82. 








ENGLISH MEASURES. 










Values of e = 


-- e' - 0.000367 B{t- t') (i -f ^Y~^) 
5=30.00 






/' 


t-t' 


0.0 


1.0 


2.0 


3.0 


4.0 


5.0 


6.0 


7.0 


8.0 


9.0 


! lo.oj 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


60° 


^eX^B 


+.0004 


+.0007 


+.0011 


+.0015 


+.0019 


+.0022 


+.0026 


+-003C 


+.0034 


+•0037 


60° 


0.522 


0.511 


0.500 


0.488 


0.477 


0.466 


0-455 


0.444 


0.432 


0.421 


0.410 


6r 


•541 


•530 


•518 


•507 


.496 


•485 


-474 


.462 


•451 


.440 


•429 


62 


.560 


•549 


•538 


•527 


.516 


•504 


■493 


.482 


•471 


•459 


.448 


63 


•580 


569 


•558 


•547 


•536 


•524 


•513 


.502 


.491 


•479 


.468 


i 64 


.601 


•590 


•579 


• 568 


•556 


•545 


-534 


•523 


•511 


.500 


.489 


65 


.623 


.611 


.600 


•589 


•578 


.566 


•555 


•544 


•533 


•521 


.510 


66 


■645 


•633 


.622 


.611 


.600 


.588 


•577 


• 566 


•555 


•543 


•532 


67 


.667 


.656 


•64s 


•634 


.622 


.611 


.600 


.589 


•577 


• 566 


•555 


68 


.691 


.680 


.668 


•657 


.646 


•635 


.623 


.612 


.601 


■590 


•578 


69 


•715 


.704 


.692 


.681 


.670 


•659 


.647 


.636 


•625 


.614 


.602 


70 


.740 


.729 


.717 


.706 


•69s 


.684 


.672 


.661 


.650 


•638 


.627 


71 


.766 


•754 


•743 


•732 


.720 


.709 


.698 


.687 


■675 


.664 


•653 


72 


.792 


.781 


.769 


•758 


•747 


•735 


•724 


•713 


.702 


.690 


.679 


73 


.819 


.808 


•797 


•785 


•774 


.763 


•751 


.740 


•729 


•717 


.706 


74 


.847 


.836 


.824 


■813 


.802 


.791 


•779 


.768 


•757 


•745 


•734 


75 


.876 


•865 


•853 


.842 


.831 


.819 


.808 


•797 


.786 


•774 


•763 


76 


.906 


.894 


•883 


.872 


.860 


•849 


•838 


.826 


•815 


.804 


.792 


77 


■936 


•925 


.914 


.902 


.891 


.880 


.868 


•857- 


.846 


•834 


•823 


78 


.q68 


•956 


•945 


•934 


.922 


.911 


.900 


.888 


.877 


.866 


•854 


79 


1. 000 


•989 


•977 


.966 


•955 


•943 


•932 


.921 


.909 


.898 


.887 


80 


I -033 


1.022 


I.OII 


•999 


.988 


•977 


•965 


•954 


•943 


-931 


.920 


81 


.068 


.056 


•04s 


1.034 


1.022 


I.OII 


•999 


.988 


•977 


•965 


•954 


82 


.103 


.092 


.080 


.069 


•057 


.046 


1^035 


1.023 


1. 012 


1. 001 


•989 


83 


•139 


.128 


.116 


.105 


.094 


.082 


.071 


.060 


.048 


•037 


1.026 


84 


.176 


•165 


•154 


.142 


•131 


.120 


.108 


.097 


.086 


.074 


.063 


85 


1. 215 


1.204 


1. 192 


i.iSi 


1.T69 


1. 158 


1. 147 


^•i35 


1. 124 


1. 112 


I.IOI 


86 


•254 


•243 


.232 


.220 


.209 


.197 


.186 


•175 


.163 


.152 


.140 


87 


•29s 


.284 


.272 


.261 


•249 


•238 


.227 


.215 


.204 


.192 


.181 


88 


•336 


•325 


•314 


•302 


.291 


• 279 


.268 


•257 


•245 


•234 


.222 


89 


•379 


•368 


•357 


•345 


•334 


•322 


•311 


.300 


.288 


•277 


.265 


90 


1-423 


1.412 


1. 40 1 


1.389 


i^378 


1.366 


1-355 


^•343 


^■3>32 


1.321 


1.309 


91 


.469 


•457 


.446 


•435 


•423 


.412 


.400 


-389 


•377 


•366 


•355 


92 


•515 


•504 


•492 


.481 


.470 


•458 


•447 


•435 


•424 


.412 


.401 


93 


•563 


•552 


•540 


•529 


•517 


.506 


•494 


•483 


.471 


.460 


•449 


94 


.612 


.601 


•589 


•578 


•566 


•555 


•543 


•532 


•521 


•509 


•498 


95 


1.662 


1.651 


1.640 


1.628 


1.617 


1.605 


1^594 


i^582 


i^57i 


1^559 


1.548 


96 


.714 


•703 


.691 


.680 


.668 


•657 


.646 


•634 


.623 


.611 


.600 


97 


.767 


.756 


•744 


•733 


.722 


.710 


.699 


.687 


.776 


.664 


•653 


98 


.822 


.811 


•799 


.788 


.776 


•765 


•753 


■ 742 


•730 


.719 


.707 


99 


.878 


.867 


•855 


•844 


•832 


.821 


.809 


•798 


.786 


•775 


•763 


100 


1.936 


1.9 24 


^•9i3 


1.901 


1.890 


1.878 


1.867 


1^855 


1.844 


1.832 


1.821 


lOI 


•994 


•983 


•972 


.960 


•949 


•937 


.926 


.914 


•903 


.891 


.880 


102 


-'•055 


2.043 


2.032 


2.020 


2.009 


•997 


.986 


•974 


•963 


•951 


.940 


103 


.117 


.106 


•094 1 


■083" 


.071 


2.060 


2.048 


2.037 


2.025 


2.014 


2.002 


104 


.181 


.169 


•158 


.146 


•13s 


•123 


.112 


.100 


.089 


.077 


.066 


105 


2.246 


2^235 


2.223 


2.212 


2.200 


2.189 


2.177 


2.166 


2.154 


2^143 


2. 131 


106 


•314 


.302 


.290 


.279 


.267 


• 256 


.244 


•233 


.221 


.210 


.198 


107 


.382 


•371 


•359 


•348 


•336 


•325 


•313 


.302 


.290 


.278 


.267 


108 


•453 


.441 


•430 


.418 


.407 


•395 


•384 


•372 


•361 


•349 


•337 


109 


■525 


-514 


•502 


.491 


•479 


.467 


•456 


•444 


•433 


.421 


.410 


110 


2.599 


2.588 


2^576 


2^565 


2-553 


2-542 


2^530 


2^519 


2.507 


2^495 


2.484 


110 


AcXAB 


+.0004 


+.0008 


+.0012 


+.015 


+.0019 


+ ^CX323 


+.0027 


+.0031 


+•0035 


4-.0039 



Smithsonian Tables. 



185 



Table 82. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 

Values of e = e' - 0.000367 B {t - /') ( i + ^ ~ ^ j 

B = 30.00 



r 










t-t' 










1 


0.0 


11 


12 


13 


14 


15 


16 


17 


18 


19 


20 


F. 


inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


60° 


AeXAB 


+.0041 


+.0045 


+.0049 


+.0052 


+.0056 


+.0060 


+.0063 


•f.0067 


+.0071 


+.0075 


60° 


0.522 


0.399 


0.388 


0.376 


0-365 


0.354 


0.343 


0-331 


0.320 


0.309 


0.298 


61 


.541 


0.418 


.406 


•395 


-384 


■373 


■361 


■350 


•339 


.328 


•317 


62 


.560 


•437 


.426 


-415 


•403 


•392 


.381 


■370 


•358 


•347 


•336 


63 


.580 


-457 


.446 


-435 


-423 


.412 


.401 


■390 


•378 


•367 


•356 


64 


.601 


•478 


.466 


•455 


•444 


■433 


.422 


.410 


■399 


.388 


•377 


65 


.623 


•499 


.488 


.476 


•465 


■454 


■443 


•431 


.420 


■409 


•398 


66 


•645 


•521 


.510 


-498 


.487 


.476 


•465 


•453 


•442 


•431 


.420 


67 


.667 


•544 


-532 


-521 


.510 


•499 


.487 


.476 


•465 


•454 


•442 


68 


.691 


•567 


•556 


•544 


•533 


.522 


•5" 


•499 


.488 


•477 


.466 


69 


•715 


•591 


.580 


.568 


•557 


•546 


•535 


•523 


.512 


■501 


.490 


70 


.740 


.616 


.605 


-593 


.582 


•571 


•559 


•548 


•537 


.526 


•514 


71 


.766 


.641 


.630 


.619 


.608 


•596 


•585 


•574 


.S62 


•551 


•540 


72 


.792 


.668 


.656 


•645 


•634 


.623 


.611 


.600 


•589 


■577 


.566 


73 


.819 


•695 


.684 


.672 


.661 


.650 


.638 


.627 


.616 


.604 


•593 


74 


■847 


•723 


.711 


.700 


.689 


.678 


.666 


•655 


.644 


.632 


.621 


75 


.876 


•752 


-740 


•729 


.718 


.706 


•695 


.684 


.672 


.661 


.650 


76 


.906 


.781 


•770 


•758 


•747 


•736 


•725 


•713 


.702 


.691 


.679 


77 


•936 


.812 


.800 


.789 


•778 


.766 


•755 


•744 


•732 


.721 


.710 


78 


.968 


•843 


-832 


.820 


.809 


■798 


.786 


•775 


.764 


•752 


.741 


79 


1. 000 


•875 


.864 


-853 


.841 


.830 


.819 


.807 


.796 


•785 


-773 


80 


1-033 


•909 


.897 


.886 


•875 


.863 


.852 


.841 


.829 


.818 


.806 


81 


.068 


•943 


•931 


.920 


•909 


.897 


.886 


•875 


.863 


•852 


.841 


82 


.103 


•978 


.967 


•955 


•944 


■932 


.921 


.910 


.898 


.887 


.876 


83 


■139 


1.014 


1.003 


.991 


.980 


.969 


•957 


.946 


•935 


•923 


.912 


84 


.176 


■051 


.040 


1.029 


1. 017 


1.006 


•995 


•983 


.972 


.960 


•949 


85 


1. 215 


1.090 


1.078 


1.067 


1.056 


1.044 


1^033 


1.021 


I.OIO 


•999 


.987 


86 


•254 


.129 


.118 


.106 


•095 


•083 


.072 


.061 


.049 


1.038 


1.027 


87 


■295 


.170 


.158 


.147 


•135 


.124 


•113 


.101 


.090 


.078 


.067 


88 


•336 


.211 


.200 


.188 


.177 


■ 165 


•154 


• 143 


•131 


.120 


.108 


89 


•379 


•254 


.242 


.231 


.220 


.208 


.197 


.185 


.174 


.163 


•151 


90 


1423 


1.298 


1.286 


i^275 


1.264 


1.252 


1. 241 


1.229 


1. 218 


1.206 


^•i9S 


91 


.469 


•343 


-332 


-320 


•309 


.297 


.286 


•275 


.263 


.252 


.240 


92 


•515 


•390 


.378 


•367 


■355 


■344 


•332 


.321 


.310 


.298 


.287 


93 


•563 


•437 


.426 


.414 


•403 


•391 


.380 


•369 


•357 


•346 


•334 


94 


.612 


.486 


-475 


•463 


•452 


■440 


.429 


.418 


.406 


-395 


•383 


95 


1.662 


1-537 


1-525 


i^5i4 


1.502 


1. 49 1 


1.479 


1.468 


1.456 


1-445 


1^433 


96 


.714 


.588 


•577 


■565 


•554 


•542 


•531 


.520 


.508 


•497 


-485 


97 


.767 


.641 


.630 


.618 


.607 


•595 


•584 


•572 


.561 


•550 


•538 


98 


.822 


.696 


.684 


•673 


.661 


.650 


.638 


.627 


■615 


.604 


•593 


90 


.878 


•752 


.740 


.729 


.717 


.706 


.694 


.683 


.671 


.660 


.648 


100 


1.936 


1.809 


1.798 


1.786 


1^775 


1^763 


i^752 


1.740 


1.729 


1.717 


1.706 


lOI 


•994 


.868 


•857 


•845 


•834 


.822 


.811 


•799 


.788 


.776 


•765 


102 


2-055 


.928 


.917 


•905 


.894 


.882 


.871 


•859 


.848 


.8^6 


.825 


103 


.117 


.991 


•979 


.968 


■956 


■944 


•933 


.921 


.910 


.898 


.887 


104 


.181 


2.054 


2-043 


2.031 


2.020 


2.008 


•997 


■985 


•974 


.962 


•951 


105 


2.246 


2.120 


2.108 


2.097 


2.085 


2-073 


2.062 


2.050 


2.039 


2.027 


2.016 


lOO 


•314 


.187 


•175 


.164 


■ 152 


.141 


.129 


.118 


.106 


•094 


-083 


107 


.382 


•255 


.244 


• 232 


.221 


.209 


.198 


.186 


■175 


• 163 


■ 152 


108 


•453 


.326 


•314 


•302 


.291 


.280 


.268 


•257 


■245 


• 234 


.222 


109 


•525 


•398 


■387 


■375 


•364 


■352 


■340 


•329 


•317 


•306 


.294 


110 


2-599 


2.472 


2.461 


2.449 


2.438 


2.426 


2.414 


2.403 


2.391 


2.380 


2.368 


no 


AeXAB 


+.0042 


+.0046 


+.0050 


+.0054 


+.0058 


■f.0062 


+.0065 


■+-.0069 


+.0073 


+.0077 


- 

























Smithsonian Tables. 



186 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 

Values of e=e'— 0.000367 B {t—t') (1+ ~^" ) 

\ 1571 / 

5=30.00 



Table 82. 



t' 


/-/' 


0.0 


21 


22 


23 


24 


25 


26 


27 


28 


29 


30 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


1 Inches. 


Inches. 


Inches. 


Inches. 


60° 


Ac X^B 


+.0078 


+.C082 


+.0086 


+.0090 


+.0093 


+.0097J+.0I0I 


+.0105 


+.0108 


+.0112 


60° 


0.522 


0.287 


0.275 


0.264 


0^253 


0.242 


0.231 


0.219 


0.208 


0.197 


0.186 


61 


•541 


0-305 


■ 294 


.283 


.272 


.261 


.249 


.238 


.227 


.216 


.205 


62 


.560 


-325 


•314 


.302 


.291 


.280 


.269 


•257 


.246 


•235 


.224 


63 


.580 


-345 


•334 


.322 


•3" 


•300 


.289 


.277 


.266 


•255 


.244 


64 


.601 


•365 


•354 


•343 


•332 


.320 


•309 


.298 


.287 


.276 


.264 


65 


.623 


•387 


•375 


•364 


•353 


■342 


•330 


•319 


.308 


•297 


• 285 


66 


.645 


.408 


•397 


.386 


•375 


•363 


•352 


•341 


-330 


•319 


•307 


67 


.667 


•431 


.420 


.409 


•397 


.386 


•375 


•364 


•352 


•341 


•330 


68 


.691 


•454 


•443 


•432 


.421 


•409 


•398 


•387 


•376 


•364 


•353 


69 


•715 


•478 


.467 


•456 


•445 


•433 


.422 


.411 


•399 


•388 


•377 


70 


.740 


•503 


.492 


.481 


.469 


•458 


•447 


•435 


.424 


•413 


.402 


71 


.766 


•529 


•517 


.506 


•495 


•483 


•472 


.461 


•450 


•438 


.427 


72 


.792 


•555 


•544 


•532 


•521 


•510 


.498 


•487 


•476 


.464 


•453 


73 


.819 


•582 


•571 


•559 


•548 


•537 


•525 


•514 


•503 


.491 


.480 


74 


.847 


.610 


•598 


•587 


.576 


•564 


•553 


•542 


531 


•519 


•508 


75 


.876 


-638 


.627 


.616 


•60s 


•593 


.582 


•571 


•559 


•548 


•537 


76 


.906 


.668 


•657 


•645 


•634 


•623 


.611 


.600 


•589 


•577 


•566 


77 


•936 


.698 


.687 


.676 


.664 


•653 


.642 


.630 


.619 


.608 


•596 


78 


.968 


•730 


.718 


•707 


.696 


.684 


•673 


.662 


•650 


•639 


.628 


79 


1. 000 


.762 


•751 


•739 


.728 


.717 


•705 


.694 


.683 


.671 


.660 


80 


I -033 


•795 


.784 


.772 


.761 


•750 


•738 


•727 


.716 


•704 


•693 


81 


.068 


.829 


.818 


.806 


•795 


.784 


.772 


.761 


•750 


•738 


.727 


82 


.103 


.864 


•853 


.842 


.830 


.819 


.808 


•796 


•785 


•773 


.762 


83 


■139 


.900 


.889 


.878 


.866 


•855 


•844 


•832 


.821 


.810 


•798 


84 


.176 


•938 


.926 


•915 


.904 


.892 


.881 


.869 


.858 


.847 


•835 


85 


1. 215 


.976 


•965 


•953 


•942 


•930 


.919 


.908 


.896 


•885 


•873 


86 


•254 


1.015 


1.004 


.992 


.981 


.970 


•958 


•947 


•935 


.924 


•913 


87 


•295 


.056 


.044 


1^033 


1.021 


1. 010 


•999 


.987 


.976 


•964 


•953 


88 


■336 


.097 


.086 


.074 


.063 


.051 


1.040 


1.029 


1. 017 


1.006 


•994 


89 


•379 


.140 


.128 


.117 


.106 


•094 


-083 


.071 


.060 


.049 


1.037 


90 


1-423 


1. 184 


1. 172 


1. 161 


1. 149 


1. 138 


1. 127 


1.115 


1. 104 


1.092 


1. 08 1 


91 


.469 


.229 


.217 


.206 


•195 


• 183 


.172 


.160 


.149 


• 138 


.126 


92 


•515 


•27s 


.264 


.252 


.241 


• 230 


.218 


.207 


•195 


.184 


.172 


93 


.563 


•323 


•311 


.300 


.288 


.277 


.266 


.254 


•243 


.231 


.220 


94 


.612 


•372 


.360 


•349 


•337 


.326 


•315 


•303 


.292 


.280 


.269 


95 


1.662 


1.422 


1.411 


1^399 


1.388 


1.376 


1-365 


1^353 


1.342 


I-330 


^•3i9 


96 


.714 


•474 


.462 


•451 


•439 


.428 


.416 


•405 


•393 


•382 


•37^ 


97 


.767 


•527 


•515 


•504 


•492 


.481 


.469 


•458 


•446 


•435 


•423 


98 


.822 


.581 


•570 


•558 


•547 


•535 


•524 


•512 


.501 


.489 


•478 


99 


.878 


•637 


•625 


.614 


.602 


•591 


-580 


•568 


•557 


•545 


•534 


100 


1.936 


1.694 


1.683 


1.671 


1.660 


1.648 


1-637 


1.625 


1.614 


1.602 


i^59i 


lOI 


•994 


•753 


.742 


•730 


.719 


.707 


.696 


.684 


•673 


.661 


.650 


102 


2-055 


•813 


.802 


.790 


•779 


.767 


•756 


•744 


•733 


.721 


.710 


103 


.117 


•875 


.864 


•852 


.841 


.829 


.818 


.806 


•795 


•783 


.772 


104 


.181 


•939 


.928 


.916 


•905 


•893 


.882 


.870 


•858 


•847 


-835 


105 


2.246 


2.004 


1-993 


1.981 


1.970 


1.958 


1.947 


1^935 


1.924 


1.912 


1.901 


106 


•314 


.C71 


2.060 


2.048 


2-037 


2.025 


2.0=14 


2.002 


.991 


•979 


.968 


107 


.382 


.140 


.129 


.117 


.105 


-094 


.082 


.071 


2.059 


2.048 


2.036 


108 


■453 


.211 


.199 


.187 


.176 


.164 


•153 


.141 


.130 


.118 


.107 


109 


•525 


• 283 


.271 


.260 


.248 


.236 


•225 


.213 


.202 


.190 


.179 


110 


2-599 


2.357 


2-345 


2-334 


2.322 


2.310 


2.299 


2.287 


2.276 


2.264 


2^253 


110 


AcX AS 


+.C081 


+.0085 


+.C089 


+.0092 


+.C096 


+.01C0 


4-.0104 


+.0108 


+.01 1 2 


-I-.OII6 



Smithsonian Tables. 
18 



Table 82. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 



Values of e ■. 



0.000367 B (/-/') ^1+'— -^) 
B = 30.00 



/' 










t- 


/ 












0.0 


31 


32 


33 


34 


35 

iches. 


36 


37 


38 


39 


40 


F. 


Inches. 


Inches. 


Inches. 


Inches. 1 


iches. 1 


Inches. 


Inches. 


Inches. 1 


iches. 


Inches. 


60° 


AeX AZ5 


+.0116 


+.0120 


+.01 23 + 


0127 + 


0131 


+-0134 


+.0138 


+-0142 + 


0146 


+-0149 


60° 


0.522 


0-I7S 


0.163 


0.152 


141 


130 


0.119 


0.107 


0.096 


085 


0.074 


61 


•541 


•193 


.182 


.171 


1 6c 


148 


■137 


.126 


•115 


104 


.092 


62 


.560 


.213 


.201 


.190 


179 


168 


.156 


-145 


•134 


123 


.112 


63 


.580 


.232 


.221 


.210 


1 99 


188 


.176 


•165 


•154 


143 


•131 


64 


.601 


•253 


.242 


-231 


219 


208 


.197 


.186 


.174 


163 


.152 


65 


.623 


• 274 


.263 


-252 


240 


229 


.218 


.207 


•195 


184 


•173 


66 


.645 


.296 


.285 


-274 


262 


251 


.240 


.229 


.217 


206 


•195 


67 


.667 


.318 


•307 


.296 


285 


273 


.262 


•251 


.240 


228 


.217 


68 


.691 


•342 


-330 


•319 


308 


297 


-285 


•274 


• 263 


252 


.240 


69 


•715 


•366 


•354 


•343 


332 


321 


•309 


.298 


.287 


275 


.264 


70 


.740 


•390 


•379 


•368 


357 


345 


•334 


•323 


•311 


300 


.289 


71 


.766 


.416 


.404 


•393 


382 


371 


•359 


.348 


•337 


325 


•314 


72 


.792 


.442 


-431 


.419 


408 


,397 


•385 


■Z7A 


•363 


352 


•340 


73 


.819 


.469 


-458 


•446 


435 


424 


.412 


.401 


-390 


379 


•367 


74 


•847 


.496 


.485 


•474 


463 


451 


.440 


•429 


.418 


406 


•395 


75 


.876 


•525 


•514 


•503 


491 


480 


.469 


•457 


•446 


435 


-424 


76 


.906 


•555 


•543 


•532 


521 


509 


•498 


•4S7 


•476 


464 


•453 


77 


■936 


•585 


•574 


.562 


551 


540 


.529 


•517 


.506 


495 


•483 


78 


.968 


.616 


-605 


•594 


582 


571 


.56c 


.548 


■537 


526 


•514 


79 


1. 000 


•649 


•637 


.626 


615 


603 


•592 


• 581 


•569 


558 


•547 


80 


I -033 


.682 


.670 


•659 


648 


636 


•625 


.614 


.602 


591 


.580 


81 


.068 


.716 


.704 


•693 


682 


670 


•659 


.648 


•636 


625 


•613 


82 


.103 


•751 


-739 


.728 


717 


705 


•694 


.683 


.671 . 


660 


.648 


^2, 


•139 


.787 


•775 


•764 


753 


741 


•73c 


.719 


.707 


696 


.685 


84 


.176 


.824 


.813 


.801 


790 


778 


•767 


■756 


•744 


733 


.722 


85 


1-215 


.862 


•851 


•839 


828 


817 


.805 


•794 


.782 


771 


.760 


86 


•254 


.901 


.890 


.878 


867 


856 


-844 


•833 


.822 


810 


•799 


87 


•295 


.942 


•930 


.919 


907 


S96 


-885 


•873 


.862 


850 


•839 


88 


•336 


•983 


•972 


.960 


949 


937 


.926 


•915 


■9C3 


892 


.880 


89 


•379 


1.026 


I.0I4 


1.003 


991 


980 


.969 


•957 


•946 


934 


-923 


90 


1-423 


1.069 


1.058 


I.C47 I 


035 I 


024 


1. 01 2 


I.OOI 


.990 


978 


967 


91 


•469 


•115 


.103 


.092 


08c 


069 


-058 


.046 


i^035 I 


023 


1.012 


92 


•515 


.161 


•150 


• 138 


127 


"5 


.104 


.092 


.081 


070 


.058 


93 


•563 


.208 


•197 


.186 


174 


163 


-151 


.140 


.128 


117 


.105 


94 


.612 


•257 


.246 


•234 


223 


212 


.200 


.189 


.177 


166 


•154 


95 


1.662 


1.308 


1.296 


1.285 I 


273 I 


262 


1.250 


1.239 


1.227 I 


216 


1.204 


96 


.714 


•359 


•348 


-336 


325 


313 


.302 


.290 


•279 ■ 


267 


.256 


97 


.767 


.412 


.401 


-389 


378 


366 


-355 


■343 


•332 


320 


•309 


98 


.822 


.466 


•455 


-443 


432 


420 


.409 


•398 


•386 


375 


•363 


99 


.878 


.522 


•511 


•499 


488 


476 


-46s 


■453 


•442 


430 


.419 


100 


1.936 


1-579 


1-568 


i^556- I 


545 I 


533 


1.522 


1. 510 


1.499 I 


488 


1.476 


lOI 


•994 


.638 


.627 


•615 


604 


592 


.581 


-569 


-558 


546 


•535 


102 


2-055 


.698 


.687 


•675 


664 


652 


.641 


.629 


.618 


606 


•595 


103 


.117 


.760 


•749 


•737 


726 


714 


•703 


.691 


.680 


668 


•657 


104 


.181 


.824 


.812 


.801 


789 


778 


.766 


■755 


•743 


732 


.720 


105 


2.246 


1.889 


1.878 


1.866 I 


855 I 


843 


1.832 


1.820 


1.808 I 


797 


1^785 


106 


•314 


-956 


•945 


•933 


922 


910 


.898 


.887 


•875 


864 


•852 


107 


.382 


2.025 


2-C13 


2.002 


990 


979 


•967 


■955 


•944 


932 


.921 


loS 


•453 


-095 


.084 


.072 2 


c6o 2 


049 


2.037 


2.026 


2.014 2 


003 


.991 


1 00 


2.525 


2.167 


2.156 


2.144 2 


133 2 


121 


2.1C9 


2.098 


2.086 2 


07s 


2.063 


110 

1 


AeX AB 


-I-.0119 


+.0123 


+.0127 + 


C131 4- 


C135 


+-0139 


+•0143 


+.0146 + 


0150 


+.0154 



SMrTHSONiAN TABLES. 



Table 82. 



REDUCTION OF PSYCHROMETRIC OBSERVATIONS. 

ENGLISH MEASURES. 

Values of e = e'- 0.000367 B (/ - /') (i -\ —) 

B = 30 00 



r 












t - t' 












0.0 


41 


42 


43 


44 


45 


46 


47 


48 


49 

Inches. 


50 


F. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


Inches. 


60° 


AcXAB 


+■0153 


+-CI57 


+.0161 


+.0164 


+.0168 


+.0172 


+.0176 


+.0179 


+.0183 


+.0187 


60° 


0.522 


0.063 


0.051 


0.040 


0.029 


0.018 


0.007 










61 


•541 


.081 


.070 


•059 


.048 


.036 


.025 


0.014 


0.003 






62 


.560 


.100 


.089 


.078 


.067 


-055 


.044 


-033 


.022 


O.OII 




63 


.580 


.120 


.109 


.098 


.087 


-075 


.064 


-053 


.042 


.030 


0.019 


64 


.601 


.141 


.129 


.118 


.107 


.096 


.085 


-073 


.062 


.051 


.040 


65 


.623 


.162 


.150 


•139 


.128 


.117 


.105 


•094 


.083 


.072 


.061 


66 


■645