OF THE.
UNIVERSITY
OE ILLINOIS
1 9 IG
Ll'TT
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ABSORPTION AND TRANSPIRATION AS AFFECTED
BY TEMPERATURE AND HUMIDITY
BY
ERNEST MICHAEL RUDOLPH LAMKEY
A. B. University of Illinois, 1913
A. M. University of Illinois, 1914
THESIS
Submitted in Partial Fulfillment of the Requirements for the
Degree of
DOCTOR OF PHILOSOPHY
IN BOTANY
IN
THE GRADUATE SCHOOL
OF THE
UNIVERSITY OF ILLINOIS
1916
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CONTENTS.
I. Introduction - -- -- -- -- -- -- -- 1
I I. Apparatus - -- -- -- -- -- -- -- - 5
III. Methods- - -- -- -- -- -- -- - _ 10
1. Cultural methods
2. Manipulations -
3. Precautions -
IV. Results -----------------14
1. Results secured from experiments in which all con-
ditions were constant except light- ----- 14
2. Results secured from experiments in which all fac-
tors were uniformly maintained except that the
plants were subjected to light and darkness
periodically -------------17
V. Summary - -- -- -- -- -- -- -- --30
VI . Bibliography ---------------33
VII. Explanation of tables and curves- - ------38
VIII. Tables and Plates- ------------ 39
IX. Vita
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ABSORPTION AND TRANSPIRATION
AS AFFECTED
BY
TEMPERATURE AND HUMIDITY
I
Introduction.
External physical factors have long been known to
affect the rate of water loss from the leaf surface. That light
influences the rate of transpiration has been known since the
time of Hales (1738). Hales and Guettard (1748-49) knew that
the hygrometric conditions of the air had an influence on tran-
spiration. Mariotte (1679), and likewise Hales (1726) and
Guettard (1749) knew that temperature changes influenced the
water loss through evaporation. Wiesner (1887) was the first
definitely to point out that air in motion affects the rate of
transpiration. Later day investigators have worked with all
of these factors with more or less success. Practically all
of the work is open to the objection that certain factors
either have been neglected or not at all controlled. In the
few cases where conditions have been controlled, the results
are inconclusive because of the short period during which the
plants were exposed to the factors. No attempt is made to
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present a complete history of the varying and conflicting re-
sults which different investigators have attained in their
attempt to correlate transpirat ion with physical conditions.
Essentially all of this history is given in the monographs of
Kohl (1886), Kosaroff (1897), Eherdt (1889, 1 95 ) , and Burger-
stein (1904). It i3 of interest, in this connection, to note
that while earlier workers recognized the importance of main-
taining all external factors constant save the one under ex-
perimentation, later workers have well-nigh neglected so im-
portant a principle.
If, in recent years, little attention has been paid
to the control of conditions, still less has been paid to the
relation between the absorption of water and transpiration.
Sachs (1859), Kosaroff (1897), and Molisch (1897) were able to
produce wilting in plants by subjecting the root and shoot of
the plant to unlike temperatures. This wilting they attributed
to the excess of transpiration over absorption. Kohl and
Eberdt likewise knew that by raising the temperature of the
root the rate of absorption of water was increased. Kohl also
carried on a series of short experiments showing the relation
between absorption and transpiration. Much later, Lloyd (1908,
*13) showed quantitatively that wilting is associated with a
difference between absorption and transpiration; but, since
he worked with cut branches, his results are not of great
value, for Freeman (1909) has shown that transpiration from
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cut shoots may be the same as that of the rooted plant or may
vary as high as 27.3 percent from the normal transpiration,
depending upon the plant species and rate of transpiration,
while Munscher (1915) has shown that such transpiration may
be 20 or 30 percent less than the amount lost by the same
plant when rooted. The most valuable experiments are those
of Vesque (l876-»78) in which the effects of the temperature
of the soil upon the intake of water is noted and absorption
is directly compared to transpiration. In his experiments he
attempted to show the effect of varying conditions upon these
processes, but his control was not sufficiently precise.
Before going into the actual experimental phase of
the subject, it seems advisable to compare the curves of ab-
sorption and transpiration obtained from plants gro wn under the
normal conditions of the growing season.
From Plate I it may be seen that while the curves
of absorption and transpiration take the same general course,
their maxima are at different points. Absorption is consider-
ably in excess of transpiration from 5:16 P,M, upon the first
day until 6:16 A.M. upon the second day. From this latter
point on, however, transpiration rises above absorption. At
3:16 P.M. of the second day, the curve of transpiration cuts
across that of absorption and from that time until 5:30 A.M.
of the third day absorption is in excess of transpiration.
At 5:30 A.M, transpiration again rises slightly above
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absorption, falls slightly below it at about 6:45 A.M., and at
8:16 A.M. rises abruptly and henceforth transpiration is
greatly in excess over absorption. The curves of Plates II
and III show the same thing with only minor variations.
Similar curves may be seen for mays on Plates IV and V. In
the study of Plate V, it should be noted that the apices of
both curves are much lower on the first day than upon the
second, and this is to be attributed to the cloudy weather
which prevailed upon the first day.
These curves are presented as tj^pical examples of
numerous observations made during the summer of 1915. These
curves show that the loss of water is greatest in the morning
and begins very early. Absorption, on the other hand, exceeds
transpiration in the afternoon and the plant stores water dur-
ing this period. The amount of water gained in the afternoon
may exceed that which is retained at night, a fact which does
not seem to have been generally recognized. It is noteworthy
to point out that in the observations the plants began to wilt
slightly at about 9:30 A.M. and continued until the greatest
wilting was noticed at 1:15 and 2:15 P.M. Prom 2:30 on, re-
covery was rapid. This corresponds nicely with the quantita-
tive results expressed in the curves of Plates I and II. In
the other cases conditions were not extreme enough to produce
wilting.
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II
Apparatus.
The apparatus used was designed for the purpose of
measuring the amount of water taken up through absorption and
that given off through transpiration by plants grown under known
and constant conditions of temperature, light, humidity, and air
circulation. The apparatus necessary to meet these conditions
was, (1) plant chambers, (2) electro-thermo regulators and
heating coils, (3) a gas meter together with a device for
mixing water vapor and dry air to a known humidity, (4) nitrogen
filled tungsten lamps, (5) a potometer for measuring water ab-
sorbed, and (6) scales for measuring water transpired.
1. Cases (77 cm. high by 48 cm. square) with glass
sides and tops were used as experimental chambers. Access was
had to the chambers through a hinged glass door which completely
took up one side. These chambers could be darkened by specially
provided covers suspended from the top. They stood upon special
bases of wood (24 cm. high by 46.5 cm. square) provided with a
small hinged door opening upon the front. Thirteen centimeters
from the bottom of each base was a glass stage with ample room
left at back and front for the circulation of air. This stage
supported the scales, evaporometer , and other apparatus. Beneath
it were the electric heating elements.
2. The heating elements consisted of nichrome wire
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wound upon asbestos board and connected with the electric circuit
through a thermo-regulator capable of controlling the temperature
within five-tenths of a degree centigrade. Thermometers were
suspended in the cases to test the temperature regulation.
3. The humidifying device consisted of two large
calcium chloride cylinders furnished with water and fused calcium
chloride respectively and connected with the compressed air sup-
ply. Rubber tubes leading out of these cylinders were joined
together by means of a glass WYH, and the air was mixed to the
desired humidity by means of stop cocks in each arm of the ”YM.
The resulting mixture, which had attained the same temperature
as the experimental chamber by passing through the cylinders,
was played against the inside top of the case in the exact
center, and by thus displacing the air already contained in the
case maintained a humidity of such constancy that little atten-
tion was demanded of the operator. This introduction of air,
creating a slight current, gave an equal distribution to the
warm air arising from the heating coils beneath the glass stage.
The current of introduced air was of such low velocity that it
could not be detected by any disturbance to the leaf surface.
Three hundred and twenty liters of air were introduced every
hour. This was measured by a meter which gave readings per hour
or minute. The accuracy of the humidity control was judged by
hair hygrometers suspended at the leaf level of the plants
tested. These hygrometers were standardized in a saturated
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chamber and then re-set to coincide with the readings from a
psychrometer at each and every humidity used for a given experi-
ment. The humidity never varied more than one percent above or
below that required.
4. Light was kept constant by means of five hundred
watt nitrogen filled tungsten lamps. The current passing through
the filaments of these lamps was constant, being controlled by
an automatic volt regulator at the University lighting plant.
The lamps were placed in a horizontal position in black metal
boxes (29 cm. deep, 26 cm. wide, and 26 cm. high) with a hinged
door opening at the front. These boxes rested upon truncated
pyramids 49 cm. high, which in turn sat upon the tops of the
plant chambers. The heat generated by the lamps passed off in
the air which had entrance at the bases of the pyramids and had
exit through a four inch hole in the top of each metal box. The
pyramids, as well as plant chambers, bases, and covers, were
painted white, inside and out. The distance of the lamps from
the leaf surface was 109 cm. The light was of an intensity and
quality sufficient for the normal development of the plants
tested.
5. The potometer used was a modified type of one
devised by Professor Hottes and used for years by him in his
laboratory. The potometer -- a modified Mariotte flask -- con-
sists of an inverted burette fitted with a stopper bearing two
holes. Through one of these holes extends one end of a right-
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angle tube. Through the other extends the free end of a tube of
small bore which is bent back upon itself in such a way that the
opening of the tube on the inside of the burette is directed
downward. This tube is fitted with a stopcock and conducts air
only. The plants are grown in aspirating bottles with the tubu-
lature at the base. To set up, the burette is filled wi th water,
the stopper with the cock of air tube closed is inserted, the
burette is inverted, the right-angle tube is fitted to the tubu-
lature of the aspirating bottle, the aspirating bottle is filled
with water, then the air tube (this tube is so fitted in its
hole in the stopper that it may be easily moved up or down with
little friction) is adjusted until its upper opening is on a
level with the water in the neck of the bottle, finally the air
cock is opened, and the system is in working order. As the plant
uses water from the bottle, the level falls below the opening of
the air tube and the pressure in the two systems is equalized by
air entering the burette through the air tube. The advantage of
such a potometer is that large or small quantities of water may
be measured without sealing the absorbing system from the air
and without injecting water into the plant because of a water
column which extends above the root or cut end of the plant.
In other words, the water pressure remains constant at the level
of the absorbing surface.
6. The scales employed to measure the water of
transpiration were equipped with jeweled bearings of agate, and
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thus error arising through the accumulation of rust at high
relative humidities was eliminated. These scales were found to
be sensitive to one-thirtieth of a gram, but readings were only-
taken to within one-twentieth of a gram. The scales rested upon
the glass stages in the bases of the experimental chambers. The
potometer, clamped to a ring stand, was carried upon the scales.
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III
Methods.
1. Cultural methods.
The variety of Phaseolus vulgaris known as "Extra
Early Valentine Green Bush Beans", supplied by J. M, Thorburn
and Company, Hew York, was used. This seed had a very high
percentage of germination and produced vigorous seedlings.
In culturing the plants, the seeds were soaked for twelve hours
in water, then placed between filter paper, and, when the radi-
cles were one inch long, were transferred to paraffined wire
screens over glass aquaria containing tap water. When the
hypocotyl was about two inches in length, plants of uniform
size and vigor of growth were selected, and three placed in
the neck of each aspirating bottle. These bottles had a capa-
city of two hundred and thirty-five c.c. and were covered with
black paper to protect the root system against light. The
plants were grown in these bottles, and v/hen ready for experi-
mentation, the potometer was attached to the tubulature. This
eliminated shock or injury to the root system which might have
been caused by transferring seedlings at the beginning of an
experiment. Two sets of plants in different developmental
phases were used. One set had completely developed two simple
leaves; the other had developed in addition a complete trifo-
liate leaf. All the cultural work was carried on in a well
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lighted greenhouse with temperature automatically controlled at
20° centigrade, and with a relative humidity which seldom varied
outside the limits of fifty-five and sixty-five percent.
The variety of mays used was MReed*s Yellow Dent",
grown upon the agricultural plots of the University of Illinois
and selected from the harvest of 1914. The seed showed an al-
most perfect percentage of germination and produced uniform
and vigorous plants. The same general methods of culture as
used for Phaseolus apply to mays.
In growing the cultures it was the purpose to ob-
tain normally developed plants. For this reason the plants were
grown in the water from the wells of the University of Illinois.
The water is in effect a nutrient solution in itself. Its an-
alysis in milligrams per liter is as follows; - Minerals,
KU03, 2.3; KC1 , .8; K2S04, 2.0; K2C03, 6.4; Na2C03, 81.7;
(NH4)2 C03, 7.5; MgC03, 105.3; CaC03, 144.8; FeC03, 4.4;
Al203, .6; SiOg, 15.8; Bases 3.4: Total 375.0. Albumenoids
are less than .1 mg., nitrites less than .1 mg., and free
ammonia about 2.4 mg. per liter. Plants grown in this solution
appeared to be in better condition than those cultured in nutri-
ent solution, and it was very easy to grow green beans to mar-
ket size. The v/ater used by the plants was replaced daily, and
a new supply, thoroughly aerated, was given every other day.
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2, Manipulations.
Upon beginning an experiment, the experimental
chamber was brought into the desired temperature, humidity,
and light relations. The potometer and aspirating bottles
containing the plants were filled with water of the same tem-
perature as the air in the case and placed upon the scales
in the experimental chamber. Bach case contained two scales,
and usually plants in the developmental phases already des-
cribed were simultaneously treated. Beginning with the time
when the plants were first placed in the chamber, hourly
readings were made of the potometers and scales. The potometer
was read through the glass door, and the weighings were made
by manipulating the rider upon the scale beam by means of a
v/ ire arm. After the experiment had been completed, the plants
were returned to their original environment and their condi-
tion noted for several days. Areas of the leaves were com-
puted by means of a Caradi Roller Planimeter from tracings
made at the end of each experiment.
A standardized porous cup evaporimeter , attached
to a potometer of the style devised by Professor Hottes, was
placed in each chamber as an aid in the control of factors
affecting transpiration.
3. Precautions.
All plants were grown under uniform conditions
previously to the experimental time, as it was found that
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experiments were not comparable unless the plants were grown
under identical conditions. Plants were shielded from direct
sunlight at mid-day.
All plants showing injury to leaf surface or root
system were rejected.
Since variations in temperature affect the gas above
the water in the potometer tube and consequently the reading of
the meniscus, time was allowed for this air volume to reach the
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temperature of the experimental chamber before a reading was
taken. A few minutes at the beginning of each experiment was
found sufficient. If measurements were made under fluctuating
temperature conditions, corrections were made in the potometer
readings to allow for the expansion or contraction of the gas
enclosed in the burette.
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IV
Results *
Results secured from the experiments are presented
under two heads, namely, --
1. Results secured from experiments in which all
conditions were constant except light.
2. Results obtained from experiments in which all
factors are uniformly maintained, except that the plants were
subjected to light (intensity constant) and darkness period-
ically.
1. Results Secured Prom Experiments in Which All Conditions
Were Constant Except Light.
A glance at Table IX, and Plates VI, VII, VIII, and
I7C representing Tables VI and VII shows that onlir three of the
cultures exhibit a curve comparable to the curve obtained from
plants grown under normal growing conditions (Plates I and II),
It is the younger developmental phase which invariably shows
this curve. In this developmental phase, the transpiration
which takes place at night is only a small fraction of that
which takes place during the day. In this respect the curve
approaches that of the older developmental phase grown under
normal growing conditions. With all conditions except light
controlled, transpiration in plants of the older developmental
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stage seldom falls off more than one-half during the night. On
the other hand, plants in both developmental phases show a
maximum of transpiration and a wilting or lack of turgidity in
much the same manner as plants grown in the open. Evidently
the periodic factor light produces far greater effects upon the
young plant than upon the older one. The factors of temperature
and humidity, usually periodic, together with light would prob-
ably account for the big dropping off of transpiration in plants
grown beyond the seedling stage under normal growing conditions.
That falling temperature may account for the drop in the rate
of transpiration at night is shown on Plates X and XI (repre-
senting older developmental phases) where a drop of about eight
degrees resulted in a big depression in the rate of transpira-
tion. Such a fall in temperature, at night, would have little
effect upon plants in the young developmental phase, for trans-
piration is already almost at a minimum. From these considera-
tions, it must be concluded that periodic factors affect a
given plant differently during its different physiological
stages.
Tables X and XI show that the same holds true at
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25 with a relative humidity of 45 percent. Table XII shows
the course of transpiration with a temperature of 20° and 50
percent relative humidity. Here, in both phases, the differ-
ence between the transpiration during the night and during the
day is slight, -- a slight maximum, only, occurring during the
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day. Evidently we must conclude that under certain environ-
mental conditions periodic factors show little or no periodic
results .
However, a perusal of Table XV and the curves re-
presenting Tables XIII and XIV tells an entirely different
story. The curve of transpiration for young plants represented
in Plate XII and Table XVI represent a period in the develop-
ment of mays at the time when the leaves are unrolling after
having broken through the coleoptile. The transpiration curve,
in these cases, shows fluctuating variations without any peri-
odicity. However, during the morning of the second day, the
curve represented on Plate XII shows a steady rise. This is
probably due to the rapid development of leaf surface which is
taking place. Plates XIII, XIV, and XV represent transpiration
curves of well developed mays plants. It is seen that these
curves closely approximate those obtained from plants grown
under normal growing conditions (Plates IV and V). Light, then
is the predominating factor in producing the periodic difference
between day and night transpiration in mays. Here again a drop
in temperature or rise in humidity during the night would have
little effect, as transpiration is already near its minimum.
We must conclude that periodic environmental factors affect
different plant species differently.
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2. Results Secured From Experiments in Which All Factors Were
Uniformly Maintained, Except That the Plants Were
Subjected to Light (intensity Constant) and Dark-
ness Periodically.
A study of Tables XVI, XVII, and XVIII shows that
the curves of absorption and transpiration for plants grown at
35°C, 30°C, and 25° C. and relative humidities of 45 percent,
follow the same general course as do the curves of plants grown
with all conditions except light controlled. That is, the trans-
piration of plants in the older developmental phase does not
drop proportionally as far at night as does that of plants in
the younger phase. The maximum of transpiration is found at
practically the same hour as in the previous experiments, al-
though the intensity of light did not increase toward mid-day.
It would seem from this that the increased transpiration which
at times results in wilting near mid-day is due to exposure to
conditions slightly above the optimum rather than to increasing
intensities. Further evidence in support of this is found by
the observed fact that at a temperature of 35°C., and a relative
humidity of 45 percent., plants were often observed to wilt at
or near midnight after a recovery from a mid-day wilting (Tables
VII, IX, XVI, XXI). At 30°C.and 45 percent, relat ive humidity
plants in the older developmental phase showed no wilting at all
upon the first day, but only a slight flaccidity in the early
morning of the second day of the experiment. This is additional
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proof that increased transpirat ing and wilting near noon is due
to the duration of the stimulation rather than the increasing
intensity. Table XIX shows that the transpiration of plants in
the older developmental phase grown at 20° C. and relative humidity
of 45 percent, exhibits no periodicity, while the transpiration
of plants in the younger phase still shows this periodicity.
However, at 15°C. as pronounced a periodicity occurs in the
older phase as in the younger (Table XX),
Transpiration curves of plants grown at 35°C.,
30°C. , and 25°C. with a relative humidity of 75 percent follow
the same general course as do those grown at a relative humidity
of 45 percent .( Tables XXI, XXII, and XXIII). At 20°C. the trans-
piration of plants in the older developmental phase shows an un-
certain periodicity while that of the younger phase still retains
a slight periodicity. A marked difference appears between day
and night transpiration at 15°C. and a relative humidity of 75
percent. At the same temperature but wi th a relative humidity
of 25 percent, this difference is much more pronounced and wilting
may result. This again would indicate that an excessive trans-
piration is caused by long continued exposure to a stimulation
of constant intensity, and not necessarily due to the increasing
intensity of the periodic factor under observation. This is a
fact which Briggs and Shantz (1916) have entirely overlooked.
Attention should be called at this point to a
possible difference between absorption and transpiration under
the conditions which give rise to the results above noted.
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Table XXVII is a summary of all tables, showing the total water
absorbed and transpired for 24 hour periods. The periods chosen
for this table include, it will be noted, only that part of the
observation time that is free from any stimulation due to a
change of conditions. Other periods, for obvious reasons, might
give different results. A reference to this table shows that
at relative humidities of 45 percent, with temperature above
20°C. , transpiration, with only a few exceptions, is in excess
of absorption. At 20°C. and with a relative humidity of 45 per-
cent^ transpiration is in excess in approximately 50 percent of
the cases. This apparently is a critical temperature. With a
temperature of 15°C. and a relative humidity of 45 percent., the
transpiration of plants in the older developmental phase always
exceeds absorption. The younger developmental phase retains
much the same relation as at 20°C. At relative humidities of
75 percent, no constant relation holds between absorption and
transpiration with temperatures of 35°C. , 30°C. , and 25°C.
At 20°C, and relative humidity of 75 percent., absorption exceeds
transpiration in all cases. With a temperature of 15°C. and a
relative humidity of 75 percent,, absorption exceeds transpira-
tion in all cases except one where the difference is so small
as to be negligible. In the young phase, under the same con-
ditions, absorption does not vary by more than .05 of a gram
from transpiration. These results are in harmony with the
observations made which showed that Phaseolus showed the best
development (not necessarily increase in length) near 20°C.
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In the growing of beans in the greenhouse it was also found that
this temperature resulted in good development. It is difficult
to explain why periodicity disappears at 20°C. , unless it is
assumed that the conditions under which Phaseolus grows best
are not intense enough to produce a marked difference between
day and night transpiration.
The above considerations might lead one to put
more faith in Balias (1910, ’ll) view that the limiting factor,
in the development of Gossypium, is the root system. Lloyd’s
(1913) objection to this view is that the increased intensity of
sunlight upon days when wilting occurs may more than balance any
resulting injury by the increased production of photosynthates.
This objection is not valid, for he assumes that the increased
intensity of light is accompanied by increased temperature. It
has been pointed out by Blackman and Matthaei (1904) that an in-
crease in the intensity of one factor without an increase in
some other factor (limiting factor) will result in no increase
of carbon dioxide being fixed by plants. In this work it was
found that wilting took place at relative humidities of 25 per-
cent. with a temperature of 15°C, , -- a temperature too low for
the rapid fixation of carbon. Lloyd completely neglected the
fact that wilting may be caused by factors other than increased
light intensities. A further point overlooked by Lloyd is that
water in itself is as necessary as sunlight and warmth in the
formation of carbohydrates by plants. It is not the purpose,
however, to attempt to apply this principle to all plants, for
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it was noted that mays often showed a striking development during
periods when transpiration exceeded absorption (Plate XII and
Table XV). Of course, in this case, water stored by the plant
may have been used for metabolic processes, for the deficit
between absorption and transpiration never resulted in wilting.
It would seem, perhaps, that the lack of correlation
between the excess of transpiration (over absorption) and the
poor development of plants at temperatures above 20°C. when the
humidity is 75 percent, negates the arguments which have been
made. This, however, is not the case, for at 30°C. wilting
(increase of transpiration over absorption) seldom took place
until the day following the experiment and the return of the
plant to its original environment. Likewise the yellowing of the
old leaves of plants in the older developmental phase seldom oc-
curred at 25°C. until after the plants had been returned to their
original environment. It is only necessary, in these cases, to
recognize the fact that at low intensities effects may not follow
until a considerable time after the withdrawal of the stimulus.
It should further be mentioned that young plants which had been
exposed to temperatures of 25°C. and 30°C. and relative humidity
of 75 percent, showed no injurious after effects if kept under
the constant conditions of the growing-house; while old plants,
under similar conditions, showed a yellowing of leaves. At 35°c.
and relative humidity 45 percent, plants in the young phase
wilted either on or following the day of the experiment. Young
plants grown at 30°C. and at 45 or 75 percent, relative humidity,
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and older plants grown at 30°C, and 75 percent, relative humidity
showed no wilting on or following the day of the experiment un-
less subjected to intense sunlight. Old plants at 30°C. and
relative humidity 45 percent, often became slightly flaccid near
the end of a given experiment. At a relative humidity of 75 per-
cent. and a temperature of 35°C. t young plants showed no wilting
during an experiment while old ones wilted badly. However, the
young plants grown under these conditions wilted rhythmically
near mid-day for several days under the conditions of the growing-
house. Untreated plants showed no such wilting.
A comparison made between the curves of transpira-
tion and absorption with the observed physical effects of wilting
shows another marked difference between the two developmental
phases of Phaseolus studied. In the tables given, the point at
which the plant was observed to wilt is twice underscored; the
point at which it shows recovery is once underscored. All these
tables show that the deficit between transpiration and absorption
which results in initial wilting is much less in the older devel-
opmental phases than in the younger. The results of the experi-
ments, however, are not strictly comparable with each other for
in some cases circumstances pervented the taking of a reading
at the exact moment when the plant was placed in the experimental
chamber, and, consequently, the plant may have lost some water
before the first reading was made. These tables further show
that wilting may show no direct relation to the periodic factor
involved, but may occur at night after the periodic factor
(light) is no longer acting (Tables VI, VII, IX, XVI, XXI ) ,
,
.
,
- 23 -
It is also well, at this point, to again point out that at some
temperature intensities a flaccidity of the plants under obser-
vation occurred only in the early morning of the second day of
the experiment, sometimes before the periodic stimulus of light
had again acted. This indicates that wilting is dependent upon
internal as well as external factors.
These observations emphasize the fact that wilting
is dependent upon a complexity of factors - — internal and ex-
ternal. Thus it has been seen that wilting may occur even when
an excess of water is supplied to the plant; that it may be
conditioned by the physiological state of the plant; that it
may be dependent upon the previous environment of the plant;
and, that it may be more or less affected by internal factors.
Such factors as these have been entirely neglected by many
workers in this field (Briggs and Shantz, 1912).
In Table XXVII is given a quantitative summary of
the effects of temperature and humidity upon the rate of transpir-
ation. Livingston (1913) has suggested that seemingly pure phys-
ical processes may follow the van’t Hof f -Arrhenius law which,
broadly stated, demands that every increase of 10°C. result in
a doubling or trebling of the rate of chemical reaction. Living-
ston states that his reason for this is that many physical and
physiological reactions depend for their inception upon a multi-
tude of chemical processes going on within the plant. That tem-
perature changes do produce, within limits, differences in the
rate of reaction of certain metabolic processes and follow some-
,
24
what closely van’t Hoff's law has been made common knowledge
through the work of Blackman (1905), Matthaei (1904), Clausen
(1890), Cohen (1901), Price (1909-10), Maltaux (1906), Snyder
(1908), Lehenbauer (1914), and others. Most of this work is well
summarized in articles by Livingston (1913), Blackman (1908),
Loeb (1908), and Snyder.
The temperature coefficients for transpiration for
each rise of 10°C. , calculated from Table XXVII, are as follows
Relative Humidity 45 percent.
Young Plants.
15°C. - 25° C. , 1.16
20°C.- 30°C. , 1.96
25°C.- 35°C. , 2.44
Old Plants.
15°C. - 25°C. , 1.31
20° C. - 30® C. , 1.34
25°C. - 35° C, , 3.10
Relative Humidity 75 percent.
Young Plants.
15°C. - 25°C. , 1.47
20° C. - 30°C. , 1.30
25°C.- 35°C. , 3.56
Old Plants.
15°C. - 25° C, , 1.15
20°C. - 30° C. , 1.23
25°C. - 35°C. , 5.06
The coefficients showing the increase in pressure of water vapour
for 10°C. intervals are: -
15®C. - 25®C. , 1.84
20 C.- 30 C., 1.80
25° C.- 35°C. , 1.77
From this data it is seen that between 15°C. and
30°C. the temperature coefficients for transpiration of plants in
different stages of development grown under different conditions
of humidity (45 and 75 percent.) are fairly constant for the
respective conditions of growth, except in the case of young
- 25 -
plants grown at a relative humidity of 45 percent. With this one
exception, the temperature coefficients for transpiration lie
below the very lowest coefficient (1.5) ever found to apply to
changes in rate of chemical action under van’t Hoff’s law. Like-
wise these coefficients are always less than the coefficients of
increase for corresponding temperature changes in pressure of
vapour tension. This lesser magnitude of the coefficient may be
assigned to the independent physiological reaction of stomata to
stimulation and a consequent slowing down in the escape of water
vapour. The temperature coefficient for transpiration of all
plants, grown between 25°C. and 35°C. and at both humidities and
further, that of young plants between 20°C. and 30° C. at a humid-
ity of 45 percent., shows a very sudden increase as contrasted
with the coefficient for changes in pressure of vapour tension
for corresponding temperature changes. This appears, at first
glance, a seeming impossibility. One might think of an accumu-
lation within the leaf of vapour under pressure and of its sud-
den release through the opening of the stomata at high tempera-
tures (30°c., 35°C,), This, however, while it would account for
a sudden rise in the temperature coefficient if a short interval
of time only were considered, cannot be considered when the co-
efficient is derived from calculations based upon the total amount
of water given off in twenty-four hours.
In seeking for an explanation of this sudden rise
in the temperature coefficient for transpiration at temperatures
between 25°C. and 35°C., it is necessary once more to recall
-
.
.
, .
- 26 -
the conditions of plants grown between 25°C. and 35°C. It will
be recalled that at temperatures above 30°C. , absorption always
exceeded transpiration and that wilting always occurred during
or following the time of experimentation. Keeping this point
in mind, one should make a careful study of Table XXVII and of
the coefficients given on page 24. This will show, with the
one exception previously noted (young plants at 30°C. and re-
lative humidity 45 percent. ) , that the sudden increase in magni-
tude of the temperature coefficient for transpiration between
25°C. and 35°C. occurs not at 25°C. nor at 30°C. , but at some
temperature between 30°C. and 35° C.
Keeping the facts mentioned in the above paragraph
well in mind, one should remember that at low evaporating inten-
sities the leaf is partially or entirely injected with water.
Consequently the evaporating surface may be considered to vary
from the area of the stomata on one hand, to the area of the
water surface within the leaf plus all plant membranes bordering
the intercellular spaces. As long as an increasing intensity
does not result in a big enough drop in the water content of the
leaf to expose much of the internal membranes, every rise of
10°C. will have the same temperature coefficient, but whenever
a factor becomes intense enough to cause a great loss in leaf
water, more internal surface is exposed, and, consequently, the
increase is due not to a sudden increase in the evolution of
vapour from the leaf area taken as a unit, but from an area which
may be many times larger; i.e. , the free internal surfaces.
, - • it
.
c
♦
27
Again, at medium temperatures, the evaporating surface may be
greatly reduced because of "physiologically dry" membranes. That
is, the cell membranes may hold water very tenaciously while in
a good "tonic" condition. High temperatures, however, influence
the general "tone" of the plant and cause the membranes to become
more permeable (Lepeschh in, 1908, '09, Rysselberge, 1901). Thus
through a change in permeability, water might appear on the mem-
branes which before had been "physiologically dry". Indirect
evidence is good that this is true for the young plants (previous-
ly noted as an exception) whose temperature coefficient for trans-
o o
piration is 1.96 for temperatures between 20 C. and 30 C. at 45
percent, relative humidity; for, at 30°C. torsions and movements
of leaves (having no relation whatsoever to the usual photeolic
ones) occurred, thus indicating changes in turgor relations.
A further study of the temperature coefficients
for transpiration, shows that the sudden increase in magnitude
at high temperatures is greatest in old plants. This is in har-
mony with the observations previously made, namely, — plants in
the older developmental phase are more susceptible to injury
than are those in the younger phase. The sudden increase in the
coefficient is also greater at high relative humidities than at
low ones. This can be explained by assuming that plants exposed
to temperatures somewhat below the maximum are more injuriously
affected at high than at medium relative humidities, and according-
ly show increased permeability. Indeed, it was an observed fact
11
.
28
that plants grown at 350c. and 45 percent, relative humidity were
no more permanently injured than those grown at 75 percent, rela-
tive humidity.
Table XXVII should not be passed by without noting
that at relative humidities of 75 percent, transpiration, from a
given unit area, is always less in old plants than in younger
ones (7 - 10 days younger). This might be construed as confirma-
tion of the belief held since the time of Hoehnel (1877) that
young leaves lose more water than do old ones. It must be re-
membered, however, that about one-third of the leaf surface of
the older plants consists of young leaflets. Further, no constant
relationship holds for the amount of water lost per unit area by
young and old plants grown at 45 percent, relative humidity.
This indicates that the check in transpiration noted in old leaves
is as much due to a physiological response to environment as to the
thickening of epidermal and cuticular walls.
A further fact, which might be of value in making
interpretations of the results given in Table XXVII, is that the
stomata of plants in the older developmental phase, especially
those grown at low relative humidities, showed very little response
to temperature changes at 25°C. and below, but at 30°C. opened
widely.
It may be well, at this point, to say that the
porous cup evaporimeter v/as used in all experiments and a record
of the readings kept. It was found, through actual tests, that
the porous clay cup, used as an evaporimeter, is not an instrument
■
.
>•
.
i
29
of precision. Such an evaporimeter exposed to low evaporating
conditions, then very high ones, and again "brought back to low
ones, showed wide variations for which it was impossible to apply
the usual coefficients of corrections. Likewise it was found im-
practical to use a newly corrected instrument for each experiment.
Growth of fungi occurred on the cups, even if previously sterilized,
and since the conditions of the experiment made it impossible to
open the plant chambers to clean the evaporimeters , considerable
error was introduced. The evaporimeter did, however, serve a use-
ful purpose as a fairly good indicator of the uniformity of condi-
tions during a given experiment.
■
,
£W 1 r;
.
30
V.
Summary.
The physiological state of the plant must be con-
sidered in experiments dealing with transpiration and absorption.
The deficit between transpiration and absorption
which results in wilting is much less in plants with two full
grown simple leaves and one full grown trifoliate leaf than in
plants having two completely developed simple leaves.
Transpiration markedly exceeds absorption in the
early forenoon of a fairly hot summer’s day and falls below it in
the early afternoon. The excess of w ater held by the plant is
absorbed at this time rather than at night.
The indirect effect of external factors upon in-
ternal ones must always be considered in experiments upon wilting
and transpiration.
A rhythmic wilting may be induced in Phaseolus .
While wilting at mid-day may be due to an increas-
ing intensity of a combination of physical factors (light, tempera-
ture, humidity, air currents), it is more often due to the contin-
ued exposure to a supra-normal factor which remains constant through'
out a considerable period. Many interpretations of correlations
between periodic factors and transpiration, such as Briggs and
Shantz (1916) have made, are open to serious objections.
Similar periodic factors affect differently the
day and night transpiration of different plant species, and the
.
1
.
V
.
.
- 31 -
value of these factors varies greatly in different stages of plant
growth.
The amount of water lost through transpiration "by
a given unit area of an old plant may fall or rise above that of
a young plant, depending upon the environmental conditions.
The temperature coefficients expressing the rela-
tion betv/een rising temperature and rate of transpiration lie with-
in well defined limits for low and medium temperatures, but increase
abruptly for higher temperatures. They are further modified by
humidity.
The rate of transpiration at the end of twenty-four
hours is often increased over the initial rate at medium tempera-
tures, and reduced at high temperatures.
Periodicity in transpiration is determined by phy-
siological states of growth and external conditions.
Periodicity in transpiration may be overcome.
The stomata of plants grown for twenty-four hours in
an atmosphere of 75 percent, relative humidity show no particular
response to temperature changes betv/een 15°C. and 25°C. At tempera-
tures above 25°C. an opening of the stomata occurs.
Contrary to general opinion, relative humidity may,
under some conditions (temperature), be the factor governing
stomatal activity.
The sudden increase in transpiration at high tempera-
tures is due to the absence of water in the intercellular spaces
of the leaf, thereby enlarging the evaporating surface through the
'
•!
.
t
.
.
t
.
33
Bibliography.
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. S
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35
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II
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37
Vesque, J. L’ absorption compar^e directement a la transpiration.
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- 38 -
Explanation of Tables and Plates
In the following tables the hour of the day appears upon
the first horizontal line. The increments of absorption appear
upon the second, and the increments of transpiration appear upon
the third, each placed under its proper time interval. In case
the increments are too many to be placed on one line, they are
carried below under their proper time interval (of course twenty-
four hours removed). In those instances where all conditions
were not controlled, evaporimet er , temperature, or other records
appear on other lines, separated by a blank from the rest of the
table. Each experiment is listed serially under each table.
Since plants in both the young and old developmental phases were
usually tested together in a single experiment, the serial number
representing the number of the experiment is followed by the
letter "aH or "b". The letter "aH always signifies that the in-
crements represent those of young plants, while the letter "b“
represents increments of old plants. Thus Table XXIV la, lb
would denote that the first serial experiment of that table con-
sisted of tests made upon young plants ’'la’' and old plants Mlb"
grown together in the same plant chamber.
The curves are plotted from the increments given in the
table referred to under each plate heading. The time of day is
designated at hourly intervals upon the abscissa; the amount of
water absorbed and transpired is indicated in tenths of grams
upon the ordinate. Curves of evaporation, absorption, and trans-
piration are indicated as follows: -
dashed line v/ater loss from evaporimeter ,
broken line transpiration,
solid line absorption.
39
TABLES
and
PLATES.
>
wn Under Normal Conditions
B .
A
B
C .
C
:16 4:16 5:16 6:16
.74 1.53 1.41 1.14
.70 1.30 1.20 1.16
D
e 3:
E
.58 1.21 1.15 1.38
13.5 32.5 32.0 31.0
1.0 58.0 58.5 6.75
7:16
8:16
9:16
10:16
11:16
A.M.
12:16
1:16
2:16
1.39
.55
.29
.30
.20
.10
.24
.10
.33
.15
.20
.10
.10
.10
.15
.15
.63
28.5
.60
28.0
.45
26.5
26.0
2.55
25.0
25.0
2.45
74.0
77.0
77.5
80.0
80.0
75.0
73.0
83.5
Under Normal Conditions.
P.
A 1:
P.M.
12:30 1:30 2:30 3:30
B .7 1.90 2.27 2.25 2.71
C .1 2.50 2.50 1.85 1.40
D
8 1.22 1.90 1.05 1.95
35.0 35.0 33,5 32.0
4:30
5:30
6:30
7:30
8:30
1.63
1.31
.88
.52
.36
1.25
.85
.35
.15
.10
1.24
1.10
.78
.97
.49
31,0
29.5
28,0
26.5
25.0
E 32
table I
increments of Absorption and Transpiration for phaeeolus Grown Under Normal Conditions.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
D - Increment of Evaporation
E - Temperature
E - Relative Humidity
P.M.
A.M.
P.M.
A.M.
12:16
A 4:16
5:16
6:16
7:16
8:16
9:16 8 hrs .
6:16
6:16
7:16 8:16
9:16
10:16
11:16
12:16
1:16
2:16
3:16
4:16
5:16
6:16
7:16
8:16
9:16
10:16
11:16
1:16
2:
16
o
o
«=<
P3
1.53
1.08
.58
.31
.31 ( 8hrs .
3:16 4:16
1.05)
.05
.08
.01
.41
.85
1.08
1.39
1.36
i.5e
1.74
1.53
1.41
1.14
1.39
.55
.29
.30
.20
.10
.24
.
10
B
.25 .20
.19
.11
.14
.21
.12
.24
.95
c .00
1.20
.70
.30
.10
.30 (8hr8.
.50)
.10
.15
.30
.80
1.25
1.50
1.55
1.70
1.80
1.70
1.30
1.20
1.16
.33
.15
.20
.10
.10
.10
. 15
15
c
.10 .06
.03
.20
.10
.20
.75
1.00
1.30
D
.08
.24
.48
. 76
1.41
.62
1.26
1.03
1.58
1.21
1.15
1.38
.63
.60
.45
! 31.5
30.5
29.5
28.0
26.5
26.0
23.5
23.5 24.0
26.5
28.5
30.5
31.5
32.0
33.0
33.5
32.5
32.0
31.0
28.5
28.0
26.5
26.0
2.55
25.0
25.0
2.
45
E
24.5 23.5
23.0
22.0
22.0 21.5
23.5
26.0
28.5
F
65
62
58.5
54.5
54.5
51.0
58.0
58.5
6.75
74.0
77.0
77.5
80.0
80.0
75.0
73.0
83
.5
F
87.0 84.0
86.5
88.0
79.0 70.0
66.0
58.0
84.0
TABLE II.
Increments of Absorption and Transpiration of phaseolus Grown Under Normal Conditions.
P.M. A.M. P.M.
A 1:30
2:30
3:30
4:30
5:30 6:30
7:30
8:30
9:30
4:30 5:30
6:30
7:30
8:30
9:30
10 : 30
11:30
12:30
1:30
2:30
3:30
4:30
5:30
6:30
7:30
8:30
B .00
2.39
1.92
1.63
1.35 .80
.26
.24
. 23 (
7
hrs .
.98) .11
.06
.09
.04
.31
1.70
1.57
1.90
2.27
2.25
2.71
1.63
1.31
.88
.52
.36
C .00
2.55
1.58
1.92
1.10 .55
.10
.05
. 05 (
| 7
hrB .
.44) .11
.07
.27
.60
1.38
1.51
2.11
2.50
2.50
1.85
1.40
1.25
.85
.35
.15
.10
D
.47
1.07
.88
1.22
1.90
1.05
1.95
1.24
1.10
.78
.97
.49
35.0 33.5 32.0 31.0 29.5 28.0 26.5 25.0
B 32.0 31.0 30.0 29.0 28.0 27.0 25.0 25.0 24.0
22.0 22.0 22.5 24.0 27.0 30.0 31.0 34.0
35.0
W hj
Normal Conditions
P.M.
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
.10
.85
1.88
1.78
2.03
1.59
1.30
.90
.74
.57
.35
.29
.55
1.65
2.25
1.85
1.95
1.60
1.05
.35
.45
.25
.20
.20
.22
.35
1.55
1.55
1.17
1.58
.98
.85
.94
.65
.48
.50
24.5
27.5
27.5
28.0
27.5
27.0
26.0
26.0
23.5
22.5
22.0
21.0
58.5
50.0
49.5
46.0
51.0
53.0
60.0
64.0
66.5
72.0
74.5
77.0
Normal Conditions.
P.]
3::
5 2:16
3:16
4:16
5:16
6:16
7:16
8:16
9:16
10:16
11:16
A.M. 2:36
12:16 1:16
.(
J 1.05
1.33
1.04
1.22
1.30
.53
.76
.34
.35
.20
.24 .24 £9
.(
> 1.03
1.36
1.30
1.05
1.10
.45
.20
.20
.20
.07
.05 .10 .30
(E;
• *
32.5
31.5
31.0
30.0
28.5
28.0
26.0
25.5
25.0
25.0
23.0
24.5 24.0
>54.0
51.0
58.0
58.5
67.5
74.0
7.7.0
77.5
80.0
80.0
83.5
75.0 73.0
TABLE III.
Increments of Absorption and Transpiration of Phaseolus Grown Under Normal Conditions.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
B - Increment of Evaporation
E - Temperature
F - Relative Humidity
A.M.
P.M.
A.M.
11:45
12:45
1:45
2:45 3:45 4:45
5:45
6:45
7:45
8:45
9:45
(7 hrs .
10:45
4:45) 5:45
.00
.36
.42
1.00 .63 .63
.28
.38
.34
.33
.25
.46
(7 hrs.
.20
1.45) .11
.00
.55
.90
.90 .40 .40
.25
.50
.15
.05
.05
.10
(7 hrs.
.10
.65) .00
.00
.36
.39
.74
.60
.54
.46
.50
.31
.40
.31
.30
(7 hrs.
.25
1.51)
.15
22.0
23.5
25.0
24.0
23.5
22.5
22.0
21.0
20.5
19.5
19.0
21.5
21.0
15.5
15.5
73.0
71.0
62.5
67.0
73.0
79.0
78.0
79.0
79.0
80.0
85.0
77.0
78.0
83.0
85.5
P.M.
6:45
7;45
8:
45
9:45
10:
45
11:
: 45
12:45
1:
45
2:45
3:
45
4:45
5:45
6:45
7:45
8:45
.06
.09
1.
40
.10
•
85
1.
.88
1.78
2.
03
1.59
1.
30
.90
.74
.57
.35
.29
.00
.15
•
50
.55
1.
65
2.
.25
1.85
1.
95
1.60
1.
05
.35
.45
.25
.20
.20
.05
.14
.
16
.23
.
35
1.
,55
1.55
1.
17
1.58
,
98
.85
.94
.65
.48
.50
16.0
16.0
22
.0
24.5
27
.5
27.
.5
28.0
27
.5
27.0
26
.0
26.0
23.5
22.5
22.0
21.0
83.5
77.5
64
.5
58.5
50
.0
49.
.5
46.0
51
.0
53.0
60
.0
64.0
66.5
72.0
74.5
77.0
TABLE IV.
P.M.
increments of Absorption and
A.M.
Transpiration for Mays Grown Under Normal Conditions.
P.M.
A.M.
16
4:16
5:16
6:16
7:16
8:16 9:16 (8
hrB .
5:16)
6:16
7:16
8:16
9:16
10:16
11:16
12:16
1:16
2:16
3:16
4:16
5:16
6:16
7:16
8:16
9:16
10:16
11:16
12:16
3:16
4:16
00
1.31
1.08
.87
.65
.50 .37 (8
hrs .
.79)
.14
.11
.13
.15
.92
.42
.49
1.18
1.05
1.33
1.04
1.22
1.30
.53
.76
.34
.35
.20
.24
.21
.34
.15
.24
.13
.24
.07
.12
.25
00
1.26
1.00
.60
.30
.40 .10 (8
hrs .
1.00)
.17
.12
.45
.35
1.13
.63
1.03
1.30
1.03
1.36
1.30
1.05
1.10
.45
.20
.20
.20
.07
.05
.10
.10
.05
.15
.10
.33
.40
.76
.90
2 : 36
1:16
.24 .29
.10 .ID
(Evaporimeter the same as in Table I)
• 23* 31.5 30.5 29.5 28.0 26.5 26.0
23.0 22.5
26.0
23.5
24.0
26.5
28.5
30.5
31.5
22.0
21.0
21.5
23.5
26.5
29.0
65.0
31.0
62.0
84.0
86.5
88.0
79.0
70.0
66.0
58.0
32.0 32.0 32.5 31.5 31.0 30.0 28.5 28.0
58.5 54.5 54.0 51.0 58.0 58.5 67.5 74.0
26.0 25.5
77.0 77.5
23.0
25.0 25.0 24.5 24.0
83,5
80.0 80.0 75.0 73.0
63.5 67.0
er Normal Conditions
A
A.M.
11: 4E
45
10:45
11:45
P.M.
12:45
1:45
2:45
B
.OC
07
.10
.45
.52
.57
.88
c
.OC
35
.55
.85
.55
.70
.75
D
.OC
23
.35
1.55
1.55
1.17
1.58
E
22. C
.5
27.5
27.5
28.0
27.5
27.0
F
73. C
.5
50.0
49.5
46.0
51.0
53.0
3:45
4:45
5: 45
6:45
7:45 8:45 9:45
.71
.66
.68
.48
.14 .33 .10
.50
.50
.35
.30
.15 .05 .10
.98
.85
.94
.65
.48 .50 .30
21.0
26.0
23.5
22.5
22.0 21.0 21.5
60.0
66.5
72.0
79.5
77.0 77 i0 78.0
A.M.
k 8:00
3
Incre Humidity Under Bright Diffuse Daylight During the Day Period.
1:45 2:45 3:45 4:45 5:45 6:45 7:45 8:45 9:45 10:45
.35 .60 1.10 1.10 1.20 1.40 1.50 1.85 1.95 2.20
.75 .50 1.10 1.15 1.25 1.60 2.50 1.80 2.10 1.70
1.50 1.45 1.35 1.40 1.70 1.60 1.70 1.80 2.00 1.90
1.35 1,45 1.65 1.55 1.60 1.65 1.45 1.80 2.20 2.25
1.65 1.70 1.70 1.70 1.60 1.50 1.70 1.50 1.65 1.65
V
table
Increments of Absorption and Transpiration of Ways Grown Under Normal Conditions.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
B - Increment of Evapoiation
E - Temperature
F - Relative Humidity.
A.M.
A 11:45
P.M.
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
9:45
( 7 hrs.
10:45
A.M.
4:45)
5:45
6:45
7:45
8:45
9:45
10:45
11:45
P.M.
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:459:45
B .00
.03
.03
.39
.38
.43
.10
.41
.23
.16
.13
(7 hrs.
. 16
.87)
.16
.00
.05
.06
.07
.10
.45
.52
.57
.88
.71
.66
.68
.48
.14
.33 .10
C .00
.10
.30
.35
.30
.15
.15
.15
.05
.10
.05
(7 hrs.
.10
.40)
.00
.00
.10
.25
.35
.55
.85
.55
.70
.75
.50
.50
.35
.30
.15
.05 .10
J .00
.36
.39
.74
.60
.54
.46
.50
.31
.40
.31
(7 hrs.
.25
1.51)
.15
.05
.14
.16
.23
.35
1.55
1.55
1.17
1.58
.98
.85
.94
.65
.48
.50 .30
J 22.0
23.5
25.0
24.0
23.5
22.5
22.0
21.0
20.5
19.5
19.0
21.0
15.5)
15.5
16.0
18.0
22.0
24.5
27.5
27.5
28.0
27.5
27.0
21.0
26.0
23.5
22.5
22.0 21.0 21.5
? 73.0
71.0
62.5
67.0
73.0
79.0
78.0
79.0
79.0
80.0
85.0
71.0
83.0
85.5
83.5
77.5
64.5
58.5
50.0
49.5
46.0
51.0
53.0
60.0
66.5
72.0
79.5
77.0 77*0 78.0
TABLE VI.
Increments of Absorption and Transpiration for phaseolus Grown at 35°C. and 45 percent. Relative Humidity Under Bright Diffuse Daylight During the Day Period.
A.M. P.M. la* A.M.
A 8:00
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
9:45
10:45
3
.55
1.75
2.40
2.20
2.45
2.50
2.25
2.25
1.50
1.30
.35
.45
.90
.60
.85
.45
1.00
.35
.60
1.10
1.10
1.20
1.40
1.50
1.85
1.95
2.20
(j
1.75
2.00
2.35
2.35
2.15
2.53
2.30
1.85
1.40
.80
.75
.65
.75
.70
.40
.55
.75
.75
.50
1.10
1.15
1.25
1.60
2.50
1.80
2.10
1.70
.30
1.15
2.30
2.15
2.10
2.10
2.05
1.95
1.80
1.60
1.45
1.35
1.45
lb.
1.35
1.50
1.50
1.50
1.50
1.45
1.35
1.40
1.70
1.60
1.70
1.80
2.00
1.90
.55
2.00
2.55
2.00
2.05
2.00
2.05
2.05
1.25
1.70
1.30
1 .425 1.38
1.30
1.43
1.50
1.45
1.35
1.45
1.65
1.55
1.60
1.65
1.45
1.80
2.20
2.25
D
.85
1.15
1.70
1.45
1.60
1.63
1.55
1.70
1.60
1.60
1.50
1.50
1.55
1.50
1.60
1.55
1.63
1.65
1.70
1.70
1.70
1.60
1.50
1.70
1.50
1.65
1.65
O brf
Incr
A.M.
A 8:10
B
C
D
Increi!
A.M.
A 5:55 .
•
B .00
Humidity Under Bright Diffuse Daylight During the Day Period.
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
.50
.55
.30
.30
.60
.55
.55
.60
.50
.30
.45
.50
.55
.65
.55
.55
1.90
1.47
1.60
1.60
1.65
1.65
1.50
1.35
1.80
1.80
1.90
1.90
1.75
1.60
1.40
1.55
1.20
1.35
1.50
1.50
1.50
1.45
1.40
1.35
Humidity under Bright Diffuse Daylight During the Day Peridd.
45 11:45
85 1.85
60 2.60
10 1.30
85 1.55
A.M.
12:45 1:45
2.50 2.75
2.65 2.50
1.65 1,85
1.60 1.60
2:45 3:45
2.50 2.80
2.70 2.80
1.70 1.90
1.80 1.90
4:45 5:45
2.70 2.80
2.70 2.70
1.90 1.80
1.90 2.00
6:45 7:45
2.70 2.50
2.80 2.50
1.35 1.70
1.65 2.00
8:45
B
C
TABLE VII
Increments of Absorption and Transpiration for phaseolus Grown at 35°C. and 45 percent. Relative Humidity Under Bright Diffuse Daylight During the Day Period
A - Time
B - Increment of Absorption
C- Increment of Transpiration
D - Increment of Evaporation
la.
A.M. P.M. A.M.
A 8:10
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
B
.25
1.35
1.60
1.55
1.80
2.05
1.60
1.35
.65
.70
.80
.60
.65
.90
.55
.30
.50
.50
.55
.30
.30
.60
.55
.55
.60
C
.70
1.45
1.80
1.60
1.85
1.90
1.75
1.15
.75
.70
.70
.80
.75
.45
.55
.45
.35
.50
.30
.45
.50
.55
.65
.55
.55
E
.65
2.35
2.45
2.75
2.90
3.10
3.20
2.85
2.70
2.55
2.60
2.55
2.65
lb.
2.60
1.50
2.20
1.95
1.90
1.47
1.60
1.60
1.65
1.65
1.50
1.35
C
.70
2.40
2.75
2.80
2.75
3.25
3.00
2.55
2.65
2.55
2.55
2.60
2.70
1.60
1.95
2.10
1.70
1.80
1.80
1.90
1.90
1.75
1.60
1.40
1.55
D
1.20
1.55
1.30
1.35
1.40
1.35
1.40
1.45
1.35
1.50
1.45
1.45
1.35
1.45
1.35
1.40
1.20
1.35
1.50
1.50
1.50
1.45
1.40
1.35
TABLE VIII.
Increments of Absorption and Transpiration for phaseolus Grown at 35°C. and 45 percent. Relative Humidity under Bright Diffuse Daylight During the Day Peridd.
A.M.
P.M.
lb.
A.M.
A 5:55
6:30
6:45
7:45
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45 8:45
B .00
.50
.13
1.85
2.70
2.55
2.95
3.05
3.50
3.35
3.25
3.05
3.05
2.80
2.75
2.70
2.80
2.25
1.85
1.85
2.50
2.75
2.50
2.80
2.70
2.80
2.70
2.50
C
.40
.45
2.35
2.80
2.80
2.60
3.30
3.50
2.80
3.40
3.10
2.65
2.70
2.75
2.45
2.70
2.25
1.60
2.60
2.65
2.50
2.70
2.80
2.70
2.70
2.80
2.50
B
1.40
1.90
2.00
2.00
2.00
2.40
2.45
2.25
2.15
2.15
1.80
2b.
1.80
1.75
1.85
1.60
1.10
1.30
1.65
1.85
1.70
1.90
1.90
1.80
1.35
1.70
C
1.40
2.05
2.05
1.65
2.15
2.45
2.30
2.00
2.20
2.00
1.70
1.85
1.50
1.80
1.40
.85
1.55
1.60
1.60
1.80
1.90
1.90
2.00
1.65
2.00
ro ?> U o to
Incr«e Humidity Under Bright Diffuse Daylight During the Day Period
A.M.
A 5:15
.00
.00
.60
L 65
.85
.90
70
a.:
:53 11:53 12:53 1:53 2:53 3:53 4:53 5:53 6:53
1.45 1.45 1.20 1.10 1.10 1.30 1,20 1.20
1.10 1.50 1.20 1.20 1.15 1.35 1.20 1.15
1.10 1.20 .60 .55 .85 .95 1.00 1.10
.90 .90 .60 .90 .70 1.25 .85 1.10
lncr€3 Humidity Under Bright Diffuse Daylight During the Day Period.
AM.
7:20
l.M,
L2 : 45
1:45
2:45
3:45
4:45
.00
.35
.40
.35
.55
.30
.40
.35
.45
.40
.30
.85
.90
.95
.90
1.05
1.00
.90
.85
1,05
.95
.35 .40 .25 .45
.40 .30 .35 .40
.90 1.00 1.05 1.90
.95 1.05 1.00 1.00
1.15 1.05 1.10 1.05 1.05 1.05 1.00 1.00 1.10
table IX
increments of Absorption and Transpiration for phaseolus Grown at 35°C.
and 45 percent. Relative Humidity Under Bright Diffuse Daylight During the Day Period
la.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
D - Increment of Evaporation
A.M. P.M.
A 5 : 15
5:53
6:53
7:53
8:53
9:53
10:53
11:53
12:53
1:53
2:53
3:53
4:53
B .00
.20
.70
2.10
1.70
1.40
1.10
1.50
1.35
1.75
1.50
1.80
1.65
C .00
.30
1.10
2.30
2.10
1.50
1.30
1.20
1.20
1.45
1.50
1.80
1.65
E
.00
.40
1.50
1.35
.95
1.80
.80
.85
.90
.90
1.00
.90
C
.00
1.25
1.60
1.95
1.20
.90
.80
.80
.70
.80
.95
.85
D
.00
1.45
1.50
1.75
1.85
1. 70
1.90
1.70
1.60
1.60
1.75
1.65
A.M.
5:53
6:53
7:53
8:53
9:53
10:53
11:53
12:53
1:53
2:53
3:53
4:53
5:53
6:53
1.60
1.60
1.65
1.50
1.55
1.60
1.45
1.45
1.20
1.10
1.10
1.30
1.20
1.20
1 . 55
1 . 65
1.60
2.00
1.55
1.65
1.10
1.50
1.20
1.20
1.15
1.35
1.20
1.15
lb.
.80
.80
.80
.85
.95
.85
1.10
1.20
.60
.55
.85
.95
1.00
1.10
.90
. 70
.80
1.00
1.00
.90
.90
.90
.60
.90
.70
1.25
.85
1.10
1.60
1.60
1.60
1.60
1.75
1.70
Increments of Absorption and Transpiration
TABLE X
for phaseolus Grown at 25 C. and 45 percent. Relative Humidity Under Bright Diffuse Daylight During the Day Period.
AM. p.M.
A 7:20
8:00
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45 4:45
5:45
6:45
7:45
B
.15
.35
.55
.80
.80
• SO
.80
.60
.80
.60
.30
.45
.55
C .00
.40
.65
.70
1.05
.65
.75
.70
.75
.60
.55
.45
.40
B
.00
.65
1.05
1.10
1.20
1.10
.95
1.05
1.00
.95
.80
.95
.95
c
.00
.65
1.25
1.05
1.20
.90
1.30
.85
.95
.95
.65
.95
.85
I)
.eo
1.00
1.00
.80
.90
1.05
1.10
1.15 1.10
1.05
1.15
1.05
B.M.
8:45
9:45
10:45
11:45
12:45
1:45
2:45
3:45
4:45 5:45
6:45
7:45
8:45
.35
.45
.55
.40
.35
.40
.35
.55
.30 .35
.40
.25
.45
.50
.40
.45
.35
.40
.35
.45
.40
.30 .40
.30
.35
.40
lb.
.85
.90
.90
.95
.85
.90
.95
.90
1.05 .90
1.00
1.05
1.90
1.00
.70
.95
.95
1.00
.90
.85
1,05
.95 .95
1.05
1.00
1.00
1.10
1.10
1.00
1.10
1.15
1.05
1.10
1.05
1.05 1.05
1.00
1.00
1.10
wop <3 mo
lncrem<:?urnidity Under Bright Diffuse Daylight During the Day Period
A
B
C
A. Iff.
7:58
.M.
,c2 : 45
1:45
2:45
3:45
4:45
5:45 6:45
7:45
8:45
9:45
.30
.15
.20
.15
.20
.25
.15
.20
.30
.65
.15
.20
.15
.15
.20
.15
.20
.15
.45
.65
. 70
.60
.35
.45
.70
.55
.60
.70
.65
.75
.60
.65
.95
.50
.50
.30
.60
.40
.75
1.00
1.10
1.10
1.05
1.10
1.10
1.05 1.10
1.05
1.00
1.00
Increm!11111,13-^ Under Bright Diffuse Daylight During the Day period
A.M.
6:29 (
: 45
12:45
1:45
2:45
3:45
4:45
5:45
6:45
7:45
8:45
.00
.15
.15
.25
.20
.20
.20
.20
.20
.20
.20
.20
.25
.15
.20
.20
.20
.15
.25
.15
.20
.45
.45
.30
.40
.40
.50
.35
.45
.45
.35
.40
.35
.45
.35
.45
.40
.40
.35
.45
.40
.00
.70
.70
.75
.75
.70
.70
.70
.70
.75
.70
TABLE XI.
increments of Absorption and Transpiration for phaseolus Grown at 25°c. and 45 Percent. Relative Humidity Under Bright Diffuse Daylight During the Day Period
A - Time
B - Increment of Absorption
C - Increment of Transpiration
D - Increment of Evaporation
la.
A.M. P-M. A.M.
A 7:58 3:24
8:45
9:45
10:45
11:45
12:45 1:45
2:45 3:45 4:45 5:45 6:45 7:45
8:45
9:45
10:45
11:45
12:45 1:45
2:45
3:45
4:45
5:45 6:45 7:45
8:45
9:45
B
.40
.55
.65
.85
.85 .75
.50 .50 .25 .30 .30 .30
.20
.30
. 20
.20
.30 .15
.20
.15
.20
.25 .15 .20
.30
. 65
C
.60
.75
.85
.95 .85
.45 .50 .30 .25 .20 .30
.20
1 h
.30
.20
.20
.15 .20
.15
.15
.20
.15 .20 .15
.45
.65
B .00
.15
.55
. 75
1.05
1.15 .90
.85 .85 .80 .75 .70 .75
JL U •
.75
.70
.70
.65
.70 .60
.35
.45
.70
.55 .60 .70
.65
. 75
.00
.25
.65
1.00
1.05
1.15 1.05
.80 .95 .80 .75 .60 .75
.55
.75
.65
.65
.60 .65
.95
.50
.50
.80 .60 .40
.75
1.00
D
.00
1.15
1.10
1.05
.95 .85
.95 1.05 1.15 1.10 1.05 1.20
1.10
1.20
1.05
1.10
1.10 1.10
1.05
1.10
1.10
1.05 1.10 1.05
1.00
1.00
TABLE XII.
Increments of Absorption and Transpiration for Phaseolus Grown at 20°C. and 50 Percent Relative Humidity Under Bright Diffuse Daylight During the Day Period.
la.
A.M. P.M. A.M.
A
5:29 6:45
7:45
3:45 9:45
10:45
11:45
12:45
L: 45 2:45 3:45
4:45
3 : 45
5: 45
7: 45
8:45
3:45
10:45
11:45
12:45
L: 45
2:45 3:45
4:45
5:45 6:45
7:45
8:45
B
.00
.10
.15
.30
.25
.50
.40
.30
.30
.40
.25
.30
.10
.25
.20
• .20
.10
.25
.15
.15
.25
.20
.20
.20
.20
.20
.20
.20
C
.30
.25
.25
.35
.35
.40
.30
.25
.30
.30
.25
.20
.20
.25
.15
.15
.20
.25
.15
.20
.20
.20
.15
.25
.15
.20
B
.00
.00
.25
.35
.55
.60
.45
.60
.55
.45
.50
.45
.45
lb.
.45
.30
.45
.45
.45
.45
.30
.40
.40
.50
.35
.45
.45
.35
C
.15
.20
.55
.50
.60
.45
.60
.50
.55
.45
.50
.45
.40
.40
.45
.45
.40
.35
.45
.35
.45
.40
.40
.35
.45
.40
D
.00
.90
.80
.75
.70
.90
. 70
.85
.70
.70
.80
.75
.80
.65
.75
.70
.75
.70
.70
.75
.75
.70
.70
.70
.70
.75
.70
IncrjLdity Under Bright Diffuse Light Luring the Day Period
A.M.
A -7:45
B
C
B
C
49
2:49
3:49
4: 49
5:49
6:49
7:49
8:49
9:49
10:49
11:49
12: 49
20
.20
.40
.25
.40
.50
.40
.45
.65
.70
.80
. 75
30
.10
.55
.25
.30
.40
.50
.45
.55
.80
.65
.70
15
.15
.15
.10
.10
.20
.20
.25
.60
.95
1.25
1.20
15
.20
.20
.20
.15
.20
.20
.55
.65
1.00
1.30
1.15
Increrjiity Under Bright Diffuse Daylight During the Day Period.
A.M.
A.M,
A 6:25
!: 45
12:45
1:45 2:45
3:45
4:45 5:45
6:45
7:45
8:45 9:45 10:45
B
.25
.20
.15 .15
.20
.20 .20
.20
.30
.40 .75 .55
C
.30
.25
.15 .20
.15
.25 .10
.15
.25
.70 .70 .60
B
.30
.30
.10 .25
.20
.45 .20
.15
.30
.70 .90 . 90
C
.25
.20
.25 .20
.15
.30 .25
.20
.25
.95 .95 .90
D
.45
1.65
1.30 1.50
1.50
1.60 1.35
1.40
1.35
1.45 1.55 1.40
IncreTi
iity
Under
Bright Diffuse Daylight
During the Day Period.
A.M.
A.M.
A 6:13 e
: 48
12:48
1:48 2:48
3:48
4:48 5:48
6:48
7:48
B
50
.10
.25 .30
.25
.30 .25
.25
.35
C
.20
.20
.25 .20
.25
.35 .25
.20
.10
25
.25
.20 .25
.20
.25 .20
.20
.25
i
25
.25
.20 .20
.20
.20 .25
.25
.15
i
50
1.55 1.60 1.55 1.55 1.55 1.60 1.50 1.75
TABLE XIII
increments of Absorption and Transpiration for Mays Grown at 35°C. and 45 percent. Relative Humidity Under Bright Diffuse Light During the Day Period.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
D - Increment of Evaporation.
la .
A.M.
A -7:45 8:49 9^49
10:49
11:49
P.M.
12:49
1:49
2:49
3:49
4:49
5:49
6:49
7:49
8:49 9:49
10:49
A.M.
11:49 12:49
1:49
2:49
3:49
4: 49
5:49
6:49
7:49
8:49
9:49
10:49
11:49
P.M.
12:49
E .20
.30
.45
.50
.50
.40
.40
.35
.35
.40
.30
.65 .30
.20
.16 .35
.20
.20
.40
.25
.40
.50
.40
.45
.65
. 70
.80
. 75
.35
.30
.60
.45
.55
.40
.40
.30
.35
.45
.40
.75 .30
lb
.50 .30
.20
.15 .25
.30
.10
.55
.25
.30
.40
.50
.45
.55
.80
.65
.70
B • 55
.55
.60
1.05
1.00
.65
.60
.45
.40
.25
.30
.35
.20 .15
.15
.15
.15
.10
.10
.20
.20
.25
.60
.95
1.25
1.20
. 45
.50
.90
1.15
1.05
.65
.45
.35
.30
.25
.05
.35 .14
.30
.10 .20
.15
.20
.20
.20
.15
.20
.20
.55
.65
1.00
1.30
1.15
Increments
of Absorption
and Transpiration
for Mays Grown
at 35° C.
TABLE X
and 45 Percent.
I V.
Relative Humidity
Under
Bright Diffuse Daylight
During the
Day Peri tod.
A.M.
A 6:25 6:45
7:45
8:45
9:45
10:45
11:45
P.M.
12:45
1:45 2:45 3:45
4:45 5:45
6;45
lb.
7:45 8:45
9:45
10:45
11:45
A.M.
12:45
1:45 2:45 3:45 4:45 5:45
6:45
7:45
8:45 9:45 10:45
B
.70
.70
.60
.70
.75
1.00
.75 .95 .70
.55 .50
.30
.35 .35
.25
.25
.25
.20
.15 .15 .20 .20 .20
.20
.30
.40 .75 .55
C
.70
.70
.80
.85
.92
1.05
.80 .80 .55
.45 .35
.30
.30 .15
.20
.25
.30
.25
.15 .20 .15 .25 .10
.15
.25
.70 .70 .60
B
.30
.70
1.00
.65
1.00
1.10
1.10 .85 .65
.50 .30
.15
2b.
.35 .20
.20
.20
.30
.30
.10 .25 .20 .45 .20
.15
.30
.70 .90 .90
C
.35
.85
.85
.80
1.20
1.05
.35 .90 .55
.50 .30
.25
.15 .15
.35
.15
.25
.20
.25 .20 .15 .30 .25
.20
.25
.95 .95 .90
D
1.25
1.40
1.30
1.45
1.65
1.40
1.50 1.45 1.30
1.50 1.35
1.35
1.45 1.55
1.45
1.50
1.45
1.65
1.30 1.50 1.50 1.60 1.35
1.40
1.35
1.45 1.55 1.40
Increments
of Absorption
and Transpiration
for Mays Grown
TABLE X
at 35° C. and 45 percent.
V .
Relative Humidity
Under
Bright Diffuse Daylight
During the
Day Period.
A.M.
A 6:13 6:48
7:48
8:48
9:48
10:48
11:48
P.M.
12:48
1:48 2:48 3:48
4:48 5:48
6:48
la.
7:48 8:48
9:48
10:48
11:48
A.M.
12 : 48
1:48 2:48 3:48 4:48 5:48
6:48
7:48
B .05
.20
.05
.15
.25
.30
.25
.30 .40 .25
.35 .40
.50
.10 .25
.25
.30
.30
.10
.25 .30 .25 .30 .25
.25
.35
0 .15
.30
.20
.25
.25
.30
.25
.25 .35 .25
.45 .20
.36
.15 .25
.25
.20
.20
.20
.25 .20 .25 .35 .25
.20
.10
B
. 15
.10
. 50
. 50
.65
.65
.70 .55 .35
.30 .35
.30
lb.
.15 .15
.35
.20
.25
.25
.20 .25 .20 .25 .20
.20
.25
C
.65
.70
.70
.55
.55
.70
.55 .55 .40
.70 .35
.25
.20 .20
.25
.20
.25
.25
.20 .20 .20 .20 .25
.25
. 15
D
1.45
1.65
1.60
1.65
l.'TO
1.60
1.55 1.55 1.50
1.70 1.60
1.60
1.60 1.55
1.55
1.50
1.50
1.55 1.60 1.55 1.55 1.55 1.60
1.50
1.75
lative Humidity under Constant Light During the Day Period
A.M
A 5:4
B
C
A.M
A 6:5$
B
C
A.M.
11:20 12:20 1:20 2:20 3:20 4:20 5:20 6:20 7:20 8:20 9:20 1Q:20
• 40
.45
A.M.
.40
.45
.40
.45
.50
.50
.60
.85
.80
.60
.70
.85
.80
.80
.80 1.00
.95 1.00
.95
.85
12:15 1:15 2:15 3:15 4:15 5:15 6:15 7:15 8:15 9:15
.50 .40 .40 .55 .70 .70 .85 .70 1.00 .90
.45 .40 .45 .55 .65 .70 .90 .90 1.05 .95
B
C
A.M,
A 6:5J
B
C
B
C
1.95
1.95
1.90
1.85
A.M.
11:55
12:55
.15
.45
.50
.40
1.70
1.65
1.80
1.45
11:55 12:55 1:55 2:55 3:55 4:55 6:55 6:55 7:55 8:55 9:55
.00 .00 .90 1.05 .85 .90 .90 1.00 .90
.55 .70 .95 1.00 .90 1.00 1.00 .95 1.05
A .M ,
A 5: 4C
B
C
B
C
A.M.
0:50 11:50 12:50 1:50 2:50 3:50 4:50 5:50 6:50 7:50 8:50 9:60
.30
.50
.30
.25
.30
.30
.30
.25
.20
.30
.30
.40
.40
.45
.60
.60
.80
.75
.70
.80
.70
.80
.80
.75
B
C
B
C
1.00 1.20 1.00 1.20 1.10 1.20 1.40 1.20 1.40 1.15 1.25 1.15
1.10 1.15 1.15 1.15 1.20 1.35 1.40 1.20 1.40 1.25 1.30 1.20
TABLE XVI
increments of Absorption and Transpiration for Phaseolus Grown at 35°C. and 45 percent. Relative Humidity under Constant Light During the Day Period
A - Time
B - Increment of Absorption
C - Increment of Transpiration.
A 5:45
6:20
7:20
8:20
9:20 10:20 11:20 12:20
1:20
2:20
3:20
4:20
5:20
6:20 7:20
E
.50
.90
1.15
.85
1.10 .80 1.10
1.10
1.05
.55
.70
.55
.35 .40
C
.65
1.20
1.40
1.05
1.00 .95 1.10
.85
.90
.60
.55
.45
.40 .40
2a.
A.M.
P.M.
A 6:52
7:15
8:15
9:15
10:15
11:15 12:15 1:15
2:15
3:15
4:15
5:15
6:15
7:15 8:15
B
.20
.60
1.50
1.20
1.00 1.00 1.00
1.00
.95
.50
.60
.45
.50 .50
C
.20
.90
1.85
1.20
1.00 .90 1.10
1.00
.80
.60
.30
.55
.50 .45
2b.
B
.25
2.50
1.95
1.90 1.95 2.05
2.15
2.35
2.00
2.15
1.90
2.25 2.10
C
.65
3.10
1.85
1.90 2.00 1.90
2.15
2.06
2.10
1.95
2.10
2.05 2.20
A.M.
P.M.
A 6:53
7:22
7:55
8:55
9:55 10:55 11:55 12:55
1:55
2:55
3:55
4:55
5:55
6:55 7:55
3
.05
.45
1.10
.90
.80 .80 .70
.70
.60
.50
.60
.40
.20 .30
C
.25
.40
1.55
1.05
.90 .80 .70
.75
.60
.45
.40
.50
.35 .40
3b.
B
.15
2.20
2.15
1.85 2.15 2.45
2.00
1.70
1.50
1.20
.95
1.15 .95
C
.20
3.00
2.05
2.00 2.35 2.00
2.05
1.70
1.25
1.20
1.05
1.00 1.10
4a*
A.M.
F
'.M.
A 5:40
6:08
7:08
7:50
8:50 9
: 50 10:50 11:50 12:60
1:50
2:50
3:50
4:50
5:50 6:50
B
.10
.20
.80
.80
.80 .75 .75
.60
.90
.80
.30
.30
.20 .40
C
.30
.95
.70
1.05
.80 .85 .80
.75
.60
.60
.45
.45
.40 .35
B
.60
C
.70
4b.
B
.00
.50
.45
.80 1
.55 1.60 1.50
1.80
1.30
1.50
1.25
1.30
1.30 1.05
C
1.30
1.30 1
.40 1.60 1.60
1.55
1.30
1.40
1.25
1.35
1.15 1.15
B
1.35
C
1.15
A.M.
8:20
9:20
10:20
11:20 12:20
1:20
2:20
3:20
4:20
5:20
6:20
7:20
8:20
9:20
10:20
.35
.35
.30
.40
.40
.40
.50
.60
.80
.70
.80
.80
1.00
.95
. 45
• 35
. 45
.45
.45
.45
.50
.85
.60
.85
.80
.95
1.00
.85
A.M.
9:15
10:15
11:15
12:15
1:15
2:15
3:15
4:15
5:15
6:15
7:15
8:15
9:15
.50
.50
.40
.50
.40
.40
.55
.70
.70
.85
.70
1.00
.90
. 45
.50
.35
.45
.40
.45
.55
.65
.70
.90
.90
1.05
.95
2.10
2.45
1.65
1.95
1.95
1.80
1.70
2.00
1.60
1.70
1.75
1.35
2.10
2.30
2.00
1.90
1.85
1.80
2.00
1.90
1.80
1.75
1.75
1.65
A
i.M.
8:56
9:55
10:55 :
11 : 55 12:55
1:55
2:55
3:55
4:55
6:55
6:55
7:55
8:55
9:55
.60
.50
.80
.15
.45
.55
.55
.90
1.05
.85
.90
.90
1.00
.90
. 50
.40
.50
.50
.40
.55
.70
.95
1.00
.90
1.00
1.00
.95
1.05
1.60
1.75
1.70
1.70
1.65
1.50
2.45
2.25
2.45
2.10
2.60
1.70
1.70
1.80
.80
2.40
1.75
1.80
1.45
1.95
2.50
2.40
2.50
2.00
2.30
2.10
1.75
1.05
A
.M.
7:50
8:50 9:50 10:50 11
: 50 12:50
1:50
2:50
3:50
4:50
5:50
6:50
7:50
8:50
9:50
.35
.25
.50
.30
.30
.30
.30
.20
.30
.40
.60
.80
.70
.70
.80
.25
.30
.25
.50
.25
.30
.25
.30
.40
.45
.60
.75
.80
.80
.75
1.15
1.10
1.18
1.00
1.20
1.00
1.20
1.10
1.20
1.40
1.20
1.40
1.15
1.25
1.15
1.10
1.00
.95
1.10
1.16
1.15
1.15
1.20
1.35
1.40
1.20
1.40
1.25
1.30
1.20
ve Humidity Under Constant Light During the Day period
In
MM.
A.M.
A
7: IS
U2:50
1:50
2:50
3:50
4:50
5:50
6:50 7:50 8:50
9:50
B
.oc
.10
.20
.20
.15
.15
.20
.35 .10 .60
.50
C
. oc
.20
.20
.20
.20
.20
.20
.25 .30 .60
.35
B
.75
.55
.50
.60
.65
.60
.85 1.00 1.40
1.25
C
.55
.60
.55
.60
.60
.75
.80 1.10 1.30
1.15
A.M.
A.M.
A
6:03
:55 11
:55 12:55
1:55
2:55
3:55
4:55 5:55 6:55
7:55
B
.00
.30
.40
.45
.35
.30
.35
.30 .45 .40
.70
C
B
1 00
.35
.35
.35
.60
.35
.35
.35 .40 .50
.70
C
B
.35
.35
.60
.40
.40
.45
.60 .35 .75
.85
C
E
.55
.50
.45
.45
.50
.45
.45 .50 .75
.90
C
•
A.M.
A
.M.
A
5:23
1:07 12:07
1:07
2:07
3:07
4:07
5:07 6:07 7:07
8:07
B
.00
.35
.30
.15
.30
.30
.30
.30 .45 1.05
1.45
c
B
C
.00
.25
.30
.30
.30
.25
.25
. 40 . 50 . 20
.50
B
r\
.75
.70
.80
.80
.75
.65
.85 .90 .95
1.25
C
B
.70
.75
.75
.70
.70
.75
.85 .80 .95
1.65
C
A
B
C
B
C
b.h
A.M.
12:02
1:02
2:02
3:02
4:02
5:02
6:02
7:02
8:02
9:02
.00
.00
.60
.30
.25
.25
.45
.25
.50
.50
1.10
1.30
• 35
.30
.30
.30
.35
.35
.45
.45
1.25
1.20
.35
.35
.35
.35
.25
.40
.35
.80
1.55
1.35
• 25
.40
.30
.25
.30
.40
.40
.75
.95
1.45
10:50
• 40
.45
1.20
1.10
8:55 9:55
.80 .80
.80 .70
.85 .90
1.05 .95
9:07 10:07
.95 1.10
.80 1.10
1.05 1.45
1.00 1.40
10:02 11:02
1.20 1.30
1.25 1.15
1.60
1.55
TABLE XVII
Increment of Absorption and Transpiration for phaseolus Grown at 30°C. and 45 percent. Relative Humidity Under Constant Light During the Day Period.
A - Time
B - increment of Absorption
C - Increment of Transpiration
la.
A.M. P.M. A.M.
A
7:12 7:50
8:50
9:50
10 : 50
11:50
12:50
1:50 2:50
3:50
4:50
5:50
6:50
7:50
8:50 9:50
10:50
11:50
12:50
1:50
2: 50
3:50
4:50
5:50
6:50
7:50
8:50
9:50
10:50
B
.00 .10
.75
.75
.50
.70
.70
.60 .75
.50
.45
.20
.30
.15
.15 .20
.20
.25
.10
.20
.20
.15
.15
.20
.35
.10
.60
.50
.40
C
.00 .40
.75
.75
.70
.70
.65
.60 .55
.45
.30
.30
.20
.25
.10 .20
.25
.20
.20
.20
.20
.20
.20
.20
.25
.30
.60
.35
.45
E
.00
.60
1.00
.90
1.10
.80
1.05 .75
.60
.70
.75
.65
.60
lb.
.60 .35
.55
.60
.75
.55
.50
.60
.65
.60
.85
1.00
1.40
1.25
1.20
C
.00
.10
1.10
1.00
.95
.85
.90 .35
1.15
.65
.65
.40
.55
.50 .60
.55
.60
.55
.60
.55
.60
.60
.75
.80
1.10
1.30
1.15
1.10
A.M.
P.M.
2a.
A.M.
A
6:03 6:22
7:22
7:55
8:55
9:57 10
: 55 11:55 12:55
1:55
2:55
3:55
4:55
5:55
6:55 7:55
8:55
9:55 1C
:55 11
: 55
12:55
1:55
2:55
3:55
4:55
5:55
6:55
7:55
8:55
9:55
B
.00 .05
.60
.30
.70
1.00
.80
.90 1.00
.90
.75
.70
.50
.45
.30 .30
.40
.20
.30
.40
.45
.35
.30
.35
.30
.45
.40
.70
.80
.80
C
.00 .20
.60
.40
.90
.90
.75
1.00 .90
.85
.75
.65
.50
.70
.35 .30
.25
.40
.35
.35
.35
.60
.35
.35
.35
.40
.50
.70
.80
.70
E
.80
C
.75
2b.
E
.00
.10
.00
.45
.90
.45
1.00 1.00
.75
1.10
.75
1.00
.70
.35 .55
.35
.75
.35
.35
.60
.40
.40
.45
.60
.35
.75
.85
.85
.90
C
.00
.45
.25
.55
.75
.85
.85 .90
.95
1.05
.80
.80
.60
.50 .45
.50
.30
.55
.50
.45
.45
.50
.45
.46
.50
.75
.90
1.05
.95
E
1
.10
C
A.M.
.85
P.M.
3a.
A
.M.
A
5:23 5:46
7:07
8:07
9:07
10:07 11:07
12:07 1:07
2:07
3:07
4:07
5:07
6:07
7:07 8:07
9:07
10:07 11:07 12:07
1:07
2:07
3:07
4:07
5:07
6:07
7:07
8:07
9:07
10:07
E
.00 .10
.60
.95
.80
1.20
.95
.85 .80
.45
.50
.35
.45
.20
.30 .40
.30
.20
.35
.30
.15
.30
.30
.30
.30
.45
1.05
1.45
.95
1.10
C
.00 .20
1.05
.90
1.05
1.05
.95
.75 .70
.60
.60
.45
.35
.25
.30 .30
.30
.25
.25
.30
.30
.30
.25
.25
.40
.50
.20
.50
.80
1.10
B
1.00
C
.90
3b.
B
.00
.40
.25
.60
.75
.60
.65 .65
.60
.60
.60
.60
.65
.85 .65
.75
.65
.75
.70
.80
.80
.75
.65
.85
.90
.95
1.25
1.05
1.45
C
.00
.45
.35
.45
.80
.60
.65 .60
.60
.60
.60
.65
.75
.70 .75
.55
.eo
.70
.75
.75
.70
.70
.75
.85
.80
.95
1.65
1.00
1.40
E 1.30
C 1.35
A
iih
7:02 :
8:02 1
9:02
10:02
11:02
P.M.
12:02
1:02 :
2:02 3:02
4:02 5:02
6:02 '
7:02
4a.
8:02 9
:02
10:02
11:02
A.M.
12:02
1:02
2:02 3:02
4:02
5:02
6:02
7:02
8:
:02
9 :C2
10:
:02
11:
: 02
B
.00
.35
.15
.95
.65
1.35
.95
.65
.95
.55
.60
.30
.40
.35
.30
.25
.40
.30
.60
.30
.25
.25
.45
.25
.50
.50
1,
.10
1.30
1.
.20
1.
.30
C
.00
.45
.40
.85
1.00
1.05
1.00
.75
.75
.55
.50
.45
.35
.35
.30
.35
.30
.35
.35
.30
.30
.30
.35
.35
.45
.45
1.
.25
1.20
1.
.25
1.
.15
B
.00
.35
.30
.50
.60
.55
.55
.40
.40
.40
.25
.35
.40
4b.
.30
.30
.30
.20
.35
.35
.35
.35
.25
.40
.35
.80
1.
.55
1.35
1.
.60
C
.00
.35
.40
.35
.65
.60
.40
.40
.40
.35
.40
.30
.40
.30
.35
.25
.30
.25
.40
.30
.25
.30
.40
.40
.75
.95
1.45
1.
,55
O bd be)
Incre:
Humidity Under
Constant Light During the Day Period.
A.M.
A.M.
A 7:04
. : 50
12:50
1:50
2:50
3:50
4:50
B
.40
.20
.40
.40
.20
.40
C .00
.25
.30
.35
.35
.30
.35
B
.30
.45
.55
.60
.70
.80
C
.40
.55
.55
.60
.65
.85
A.M.
L.M.
A 6:45
L2:27
1:27
2:27
3:27
4:27
5:27
o
o
♦
.25
.15
.30
.20
.20
.25
E
C .00
.15
.15
.30
.20
.25
.25
c
B
.60
.50
.60
.65
.80
.60
B
C
.55
.55
.60
.65
.75
.75
c
A.M.
A 8:42
2:22
3:22
4:22
5:22
6:22
7:22
B .00
.20
.30
.25
.10
.30
.20
B
C .00
.25
.15
.30
.20
.20
.30
B
.35
.50
.60
.45
.80
.85
C
.40
.40
.55
.60
.60
.90
A.M.
..M.
A 6 :40 L
2:05
1:05
2:05
3:05
4:05
5:05
o
o
•
.10
.20
.15
.25
.15
.20
B
C .00
.20
.10
.20
.20
.20
.20
.15 .20 .15 .25 .20 .25
.20 .15 .25 .20 .25 .20
5:50
6:50
7:50
8:50
.40
.30
.40
.30
.50
.30
.30
.40
.85
.65
.80
.80
.85
.55
.80
.85
6:27
7:27
8:27
9:27
10:27
11:27
.15
.30
.25
.25
.40
.30
.20
.70
.20
.40
.35
.35
.80
.95
.95
.95
1.05
.80
.75
.95
.75
1.05
.95
.85
P.M.
8:22
9:22
10:22
11522
12:22
1:22
.25
.15
.40
.30
.35
.25
.20
.30
.30
.35
.40
.30
.75
.80
.85
.85
.75
.70
.75
.85
.80
.75
.80
.65
6:05
7:05
8:05
9:05
10:05
11:05
.15
.10
.25
.25
.25
.35
.25
.15
.30
.15
.60
.35
.40
.15
.50
.40
.50
.60
.30
.30
.40
.50
.55
.60
aobdw OOMW
TABLE XVIII.
increments of Absorption and Transpiration for Phaseolus Grown at 25°C. and 45 percent. Relative Humidity Under Constant Light During the Day Period.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
A
A.M.
7:04 7:35 7:50
8:50
9:50
•
10:50
11:50
P.M.
12:50
1:50
2:
50
3:50
4:50
5:50
6:50
la.
7:50 8:50
9:50
10:50
1]
L : 50
A.M.
12:50
1:50
2:50
3:50
4:50
5:50
6:50
7:50
8:50
B
.00
.50
50
.20
.65
.65
.40
•
20
.20
.40
.35
.25
,40
.20
.50
.20
.40
.20
.40
.40
.20
.40
.40
.30
.40
.30
C
.00 .00
.60
.35
.40
.40
.45
.50
•
45
.35
.30
.45
.35
.20
.35
.40
.25
.35
.30
.35
.35
.30
.35
.50
.30
.30
.40
B
.00 .25
.30
,40
. 40
.35
.25
.45
•
30
.45
.30
.60
.30
lb.
.25 .30
.45
.40
.30
.45
.55
.60
.70
.80
.85
.65
.80
.80
C
.00 .05
.50
.50
.35
.35
.25
.40
•
35
.70
.35
.35
.70
.30
.30
.40
.30
.40
.55
♦ 55
.60
.65
.85
.85
.55
.80
.85
A.M. P.M. 2a,
A 6:45 7:25 8:27 9:27 10:27 11:27 12:27 1:27 2:27 3:27 4:27 5:27 6:27 7:27 8:27 9:27 10:27 11:27
A.M.
12:27 1:27 2:27 3:27 4:27 5:27 6:27 7:27 8:27 9:27 10:27 11:27
o
o
•
.10
.05
.05
.05
.05
.35
.40
.45
30
.35
.25
.40
.
30
.00
.30
.35
.40
.40
.50
.50
.45
.1
35
.30
.35
.35
35
.00
.15
.20
.55
.55
.95
.85
.95
• 1
55
.95
.85
.80
.
80
.00
.65
.40
.50
.70
.90
.85
.85
^ i
90
.85
.80
.80
•
75
A.M.
P.M.
8:42
9:22
10:24
11:22
12:22
1:22
2:22 ;
3:22
4:22
5:1
22
•
o
o
.20
.40
.50
.40
.40
.30
.40
.15
• 1
35
.40
.35
.35
o
o
.40
.45
.35
.55
.35
.35
.30
.20
.:
25
.35
.35
.30
.00
.15
.45
.60
.65
.65
.45
.50
• i
35
.70
.65
.70
.00
.80
.55
.60
.65
.60
.40
.50
• '
55
.70
.70
.60
A.M.
P
.M.
6:40
7:05
8:05 '
9:05 10:05 11
,:05 12:05
1:05 :
2:05
3:'
05
o
o
•
.05
.35
.40
.45
.35
.55
.35
.45
• 1
30
.00
.25
.30
.20
•
50
.25
.45
.60
.40
.55
.45
.55
.50
• ■
30
.25
.25
.55
•
50
i
.00
.10
.60
.25
.45
.50
.50
.45
•
35
l
.65
.65
.70
a
75
.00
.35
.45
.55
.45
.50
.50
.55
•
35
.55
.65
.90
•
75
.40
.30
.40
.35
.25
.15
.25
.20
.25
.15
.30
.20
.20
.25
.15
.30
.25
.25 .40
.30
.30
.45
.30
.25
.20
.25
.25
.20
.20
.15
.15
.30
.20
.25
.25
.20
.70
.20
.40 .35
.35
.25
2b
a
.80
.60
.50
.55
.25
.40 .
45
.55
.60
.50
.60
.65
.80
.60
.80
.95
.95
.95 1.05
.80
.70
.70
.50
.70
.45
.45
.45
.40
.45
.55
.55
.60
.65
.75
.75
.75
.95
.75 1
.05 .95
.85
.80
3a
•
A.M.
P.M.
6:22
7:22
8:22
9:22
10:22
11:22
12:22
1:22
2:22
3:22
4:22
5:22
6:22
7:22
8:22
9:22
10:22
11522 12:22
1:22
.10
.40
.20
.15
.15
.30
.20
.15
.20
.30
.25
.10
.30
.20
.25
.15
.40
.30 .35
.25
.20
.20
.20
.20
.20
.35
.15
.25
.25
.15
.30
.20
.20
.30
.20
.30
.30
.35 .40
.30
3b
a
.50
.40
.30
.40
.30
.30
.40
.35
.35
.50
.60
.45
.80
.85
.75
.80
.85
.85 .76
.70
.25
.40
.30
.40
.30
.40
.40
.35
.40
.40
.56
.60
.60
.90
.75
.85
.80
.75 .80
.65
4a
a
l.M.
4:05
5:05
6:05
7:05
8:05 9
:05 10
:05 11
:05
L2:05
1:06
2:05
3:05
4:05
5:05
6:05
7:05
8:05 9
:05 10:05 11
:05
.40
.30
.20
.40
.15
.20
.10
.25
.10
.20
.15
.25
.15
.20
.15
.10
.25
.25 .25
.35
.45
.50
.35
.15
.35
.10
.15
.15
.20
.20
.20
.10
.20
.20
.20
.20
.25
.15
.30
.15 .60
.35
.40
.40
4b
a
.30
.30
.30
.30
.20
.20
.15
.30
.15
.20
.15
.25
.20
.25
.40
.15
.50
.40 .50
.60
.75
.60
.30
.20
.30
.15
.20
.20
.25
.25
.20
.15
.25
.20
.25
.20
.30
.30
.40
.50 .55
.60
.75
.70
O trf W O O be) w
ed)
A
A.M.
9:27
3:27
4:27
5:27
6:27
7:27
8:27
9:27
10:27
11:27
P.M.
12:27
1:27
2:27
.00
.25
.20
.25
.05
.05
.05
.35
.15
.25
.25
.25
.35
.00
.15
.15
.10
.15
.15
.25
.30
.15
.30
.20
.55
.20
.30
.50
.35
.35
.20
.45
.45
.55
.50
.40
.70
.70
.35
.30
.15
.55
.35
.40
.60
.40
.55
.65
.70
.60
o w w oo w w
/
TABLE XVIII (Continued)
5a.
i k, P.M. A.M. P.M.
A 9:27 10:27 11:27 12:27 1:27 2:27 3:27 4:27 5:27 6:27 7:27 8:27 9:27 10:27 11:27 12:27 1:27 2:27 3:27 4:27 5:27 6:27 7:27 8:27 9:27 10:27 11:27 12:27 1:27 2:27
.00
.45
.75
.55 .35
.40
.50
.25
.35
.10
.20
.05
.25
.30
.10
.10
.15
.10
.25
o
N
.25
.05
.05
.05
.35
.15
.25
.25
.25
.35
.25
.25
.20
.00
.45
.50
.70 .65
.30
.45
.20
.30
.20
.20
.15
.15
.25
.10
.20
.10
.15
.15
.15
.10
.15
.15
.25
.30
.15
.30
.20
.55
.20
.45
.45
.10
5b.
.00
1.00 1.75
.85
.75
.60
1.05
.20
.20
.30
.25
.35
.40
.35
.25
.35
.30
.50
.35
.35
.20
.45
.45
.55
.50
.40
.70
.70
.75
.80
.70
.15
1.00 .80
.80
.85
.45
.65
.30
.55
,30
.40
.30
.30
.35
.40
.35
.35
.30
.15
.55
.35
.40
.60
.40
.55
.65
.70
.60
.85
.95
.35
♦
ow o bd > o w
Inc^re Humidity Under Constant Light During the Day Period.
A.M.
B
C
A.M,
A 6:05
B ,00
C .00
B
C
A.M.
A 5:02
B .00
C .00
A.M,
A.M,
6:20
.00
33
11:33
12:33
1:33
2:33
3:33
4:33
5:33
6:33
7:33
6:33
25
15
.10
.10
.15
.20
.10
.15
.10
.15
.30
.20
.10
.10
.10
.15
.20
.15
.35
.35
.30
.30
35
60
.25
.60
.55
.40
.30
.45
.60
.55
.40
.60
.40
.35
.60
.55
.45
.45
.60
.65
.45
.55
:27
A.M.
12:27
1:27
2:27
3:27
4:27
5:27
6:27
7:27
8:27
9:27
.05
.10
.15
.15
.10
.15
.25
.15
.20
.20
.10
.10
.10
.20
.20
.15
.25
.25
.25
.30
.30
.25
.40
.35
.55
.55
.55
.50
.65
.55
.65
.60
.40
.40
.70
.55
.40
.40
.65
.65
.60
.60
.65
.40
A.M.
24 11:24 12:24
1:24
2:24
3:24
4:24
5:24
6:24
7:24
8:24
30
20
.30
.25
.35
.15
.35
.20
.30
.25
.30
.20
.20
.25
.20
.25
.25
.20
.25
.30
.25
.40
30
35
.40
.60
.45
.45
.35
.45
.50
.45
.50
.50
.50
.45
.60
.60
.50
.35
.35
.55
.75
.60
:22
A.M.
12:22
1:22
2:22
3:22
4:22
5:22
6:22
7:22
B:22.
9:22
.25
.20
.25
.25
.20
.30
.20
.20
.25
.30
.20
.20
.45
.35
.25
.15
.20
.35
.40
.20
.25
.45
.60
.40
.35
.40
.25
.45
.60
.40
.30
.45
.60
.45
.60
.60
.35
.30
.55
.50
.55
.55
.60
.50
9:33
.35
.40
.55
.55
:24
.45
.40
.45
.60
TABLE XIX
Increments of Absorption and Transpiration for phaseolus Grown at 20°C. and 45 Percent. Relative Humidity Under Constant Light During the Day Period.
A
B
C
A.M.
A 5:06 5:33 6:33
- Time
- Increment of .
- Increment of '
7:33 8:33 9:33
Absorption
Transpiration
P
10:33 11:33 12
.M.
: 33
1:33
2:33
3:33
4:33
5:33
la.
6:33
7:33
8:33
9:33
10:33
11:33 :
A.M.
12:33
1:33
2:33
3:33
4:33
5:33
6:33
7:33
8:33
9:33
B .00 .30
.50
.50
.65
.50
.45
.30
.55
.45
.45
.25
.25
.20
.20
.25
.20
.25
.10
.15
.10
.10
.30
.10
.10
.20
.35
.30
.35
C .00 .45
.40
.45
.40
.60
.55
.55
.60
.45
.35
.35
.30
.20
.10
.15
.15
.15
.10
.20
.15
.15
.20
.10
.15
.15
.35
.30
.40
B .00
.40
.40
.35
.45
.30
.30
.60
.60
.30
.60
.60
lb.
.60
.30
.30
.55
.35
.25
.55
.30
.60
.40
.40
.60
.45
.60
.45
.55
C .00 .70
.35
.45
.15
.45
.35
.50
.60
.45
.50
.50
.50
.50
.40
.40
.60
.60
.60
.40
.45
.55
.60
.35
.55
.45
.65
.55
.55
A.M.
A 6:05 6:27 7:27
8:27
9:27
10:27
11:27
P.M.
12:27 1
: 27
2:27
3:27
4:27
5:27
6:27
2a.
7:27
8:27
9:27
10:27
11:27
A .M.
12:27
1:27
2:27
3:27
4:27
5:27
6:27
7:27
8:27
9:27
B .00 .20 .40
.50
.30
.75
.45
.50
.50
.30
.40
.30
.25
.25
.20
.20
.25
.20
.05
.15
.10
.25
.20
.10
.10
.20
.25
.25
.30
C .00 .20 .45
.45
.45
.55
.45
.50
.50
.40
.35
.30
.20
.25
.15
.20
.15
.15
.10
.15
.15
.15
.20
.10
.20
.15
.25
.30
.25
B .00 .05
.35
.40
. 35
.45
.40
.40
.40
.40
.60
.60
.40
2b.
.40
.75
.40
.35
.40
.55
.55
.65
.65
.40
.70
.40
.65
.60
.65
C .00 .50
.35
.25
.35
.35
.55
.50
.50
.55
.55
.45
.50
.60
.40
.50
.55
.35
.55
.50
.55
.60
.40
.55
.40
.65
.60
.40
A.M.
A 5:02 5:23 6:24
7:24
8:24
9:24 :
P.
10:24 11:24 12
M.
:24
1:24
2:24
3:24
4;24
>
5:24
3a .
6:24
7:24
8:24
9:24
10:24
11:24 i
A.M.
12:24
1:24
2:24
3:24
4:24
5:24
6:24
7:24
8:24
9:24
B .00 .00 .15
.05
.15
.35
.35
.30
.30
.40
.20
.30
.25
.30
.30
.20
.25
.15
.30
.30
.35
.35
.30
.30
.20
.20
.25
.25
.25
.45
C .00 .20 .35
.40
.25
.05
.30
.30
.40
.35
.50
.30
.35
.25
.25
.25
.20
.25
.20
.25
.15
.20
.25
.20
.25
.25
.20
.30
.40
.40
E .00 .00
.45
.30
.40
.40
.35
.35
.75
.35
.40
.30
.40
3b.
.50
.35
.40
.45
.30
.40
.45
.35
.50
.50
.50
.60
.50
.35
.75
.45
C .00 .35
.30
.35
.30
.40
.50
.50
.60
.45
.40
.40
.50
.40
.20
.40
.40
.35
.60
.45
.45
.45
.50
.45
.60
.35
.55
.60
.60
A.M.
A 6:20 6:50 7:20
8:20
9:22
10:22
11:22
P.M.
12:22 1
: 22
2:22
3:22
4:22
5:22
6:22
4a.
7:22
8:22
9:22
10:22
11:22
A.M.
12:22
1:22
2:22
3:22
4:22
5:22
6:22
7:22
8:22
9:22
B .00 .10 .05
.10
.20
.40
.25
.25
.20
.30
.40
.30
.25
.25
.35
.30
.25
.20
.25
.25
.20
.20
.25
.20
.45
.25
.20
.40
.25
C .15 .25
.40
.25
.25
.20
.40
.25
.25
.25
.30
.20
.45
.15
.25
.20
.30
.20
.25
.30
.20
.30
.20
.35
.15
.35
.20
.45
B .00
C .20
.35
.35
.05
.40
.40
.40
.05
.35
.35
.35
.50
4b.
.45
.30
.30
.30
.60
.35
.25
.60
.30
.60
.60
.35
.55
.55
.60
.40
.30
.40
.30
.30
.25
.40
.30
.45
.30
.40
.35
.35
.35
.45
.40
.40
.45
.40
.45
.45
.60
.30
.50
.55
.50
Incire Humidity Under Constant Light During the Day period
A.M. A.M.
A 7:05.2:05 1:05 2:05 3:05 4:05 5:05 6:05 7:05 8:05 9:05 10:05 11:05
B .00
.10
.20
.20
.20
.15
.15
.20
.20 .15 .35
.30 .50
B
C .00
.15
.20
.15
.20
.10
.20
.25
.20 .20 .30
.45 .40
c
B
.20
.25
.25
.20
.34
.30
.45
.20 .40 .40
.45 .85
B
C
.25
.20
.25
.30
.30
.25
.55
.30 .30 .50
.65 .60
A.M.
A 10 :0;
3 3:28
4:28
5:28
6:28
7:28
8:28
9:28
P.M.
10:28 11:28 12:28 1:28
B .0<
> .05
.10
.30
.15
.10
.40
.20
.35 .45
.30 .55
B
C .0(
> .15
.10
.25
.10
.25
.30
.20
.35 .40
.35 .35
c
B
> .35
.30
.40
.30
.30
.45
.20
.40 .35
.60 .35
B
C
) .20
.30
.40
.25
.30
.40
.25
.45 .50
.40 .40
c
AM.
A 7:25
1:00 2
:00 3
:00 4
: 00 5
: 00 6
: 00 7
:00 8
: 00
B .00
.10
.20
.15
.10
.05
.20
.10
.20
C .00
.15
.10
.10
.15
.15
.15
.15
.20
B .00
.30
.30
.15
.35
.25
.35
.25
.45
C .00
.25
.25
.35
.30
.25
.30
.30
.40
A.M.
4 6:50
L.M.
.2:10 1
: 10 2
: 10 3
: 10 4
: 10 5
: 10 6
: 10 7
: 10 8:10 9:10
10:10 11:10
3 .00
3
: .oo
b
.10
.10
.15
.15
.15
.05
.10
.25 .30 .25
.45 .20
.10
.10
.10
.15
.10
.15
.10
.15 .30 .30
.30 .30
3
3
1
f
.45
.25
.25
.45
.30
.20
.50
.30 .40 .55
.45 .60
.25
.35
.30
.30
.30
.30
.30
.35 .60 .50
.50 .30
o o tri bd a o W b) >■ Ofcrtbd o OW W
TABLE XX
increments
A.M.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
P.M.
.00
.00
35
8:05
9:05
10:05
11:05
.70
.35
.35
.35
.70
.25
.50
.30
00
.00
.55
.80
.85
00
.60
.50
.70
.55
A.M.
P.M.
10:03
10:28
11:28
.00
.30
.25
.00
.50
.25
.00
AM.
B .00 .20 .40 .45
c .00 .30 .40 .50
B .00 .10 .75 .70
C .00 .45 .60 .55
A.M.
B *00 .25 .55
B
c *00 .20 .45 .60
C
.00 .00 .30
B
.00 .35 .55
P.M.
.45
.35
.80
.75
.25
.50
.60
.50
.45
.40
.60
.50
.30
.25
.25
.30
.20
.20
.35
.55
.40
.40
.35
.45
.25
.25
.20
.30
.20
.20
.45
.55
.40
.55
.20
.55
.45
.45
.25
.20
.40
,20
.45
.90
.60
.60
.40
.65
.40
.45
.30
.30
.25
.35
.75
.30
.50
.35
.35
.30
3:28
4:28
5:28
6:28
7:28
8:28
.25
.20
.30
.35
.30
.25
.20
.35
.20
.20
.30
.25
.25
.30
.40
.60
.30
.35
.35
.20
.40
.65
.30
.25
.40
.25
.30
.30
:00 2
to
o
o
: 00 4
:00 5
: 00 6
:00
.35
.65
.70
.30
.25
.15
.25
.30
.25
.20
.30
.05
.70
.55
.55
.35
.40
.25
.55
.40
.55
.30
.35
.30
M.
1:10 1
: 10 2
: 10 3
: 10 4
: 10 5
: 10
.35
.30
.35
.35
.40
.35
.35
.40
.30
.30
.40
.35
.20
.40
.35
.45
.40
.40
.35
.40
.40
.25
.30
.35
.25
.30
.50
.20
.30
.40
.40
.40
.25
.35
.25
.25
.35
.25
.35
.50
.35
.45
.40
.30
; 15°C. and
45 Percent. Relative
Humidi ty
Under
Constant
Light
During the Day period.
la.
i5 7:05 8:05
9:05
A.M.
10:05 11:05 12:05 1
: 05 2
: 05 3
: 05 4
: 05 5
: 05 6
: 05 7
: 05 8:05 9:05
10:05 11:
iO .30 .20
.05
.10 .20
.10
.20
.20
.20
.15
.15
.20
.20 .15 .35
.30
•0 .20 .30
.25
.15 .20
.15
.20
.15
.20
.10
.20
.25
.20 .20 .30
.45
lb.
15 .30 .40
.25
.25 .20
.20
.25
.25
.20
.34
.30
.45
.20 .40 .40
.45
15 .20 ,40
.30
.35 .20
.25
.20
.25
.30
.30
.25
.55
.30 .30 .50
.65
2a.
28 10:28 11
a.:
: 28 12
M.
: 26 1:28 2:28
3:28
4:28
5:28
6:28
7:28
8:28
9:28
P.M.
10:28 11:28 12:28 1:28
10 .25
.15
.05 .40 .35
.05
.10
.30
.15
.10
.40
.20
.35 .45
.30 .55
25 .10
.15
.20 .20 .15
.15
.10
.25
.10
.25
.30
.20
.35 .40
.35 .35
2b.
15 .30
.20
.30 .30 .25
.35
.30
.40
.30
.30
.45
.20
.40 .35
.60 .35
25 .20
.30
.30 .25 .30
.20
.30
.40
.25
.30
.40
.25
.45 .50
.40 .40
3a.
'0 8:00 9:00
10:00
A.M.
11:00 12:00 1
: 00 2
: 00 3
: 00 4
: 00 5
: 00 6
: 00 7
:00 8
: 00
15 .35 .10
.20
.15 .05
.10
.20
.15
.10
.05
.20
.10
.20
10 .35 .10
.15
.15 .10
.15
.10
.10
.15
.15
.15
.15
.20
3b.
,0 .25 .20
.45
.25 .25
.30
.30
.15
.35
.25
.35
.25
.45
i0 .35 .30
.25
.30 .25
.25
.25
.35
.30
.25
.30
.30
.40
*
.0 7:10 8:10
9:10
a.:
10:10 11:10 12
M.
: 10 1
: 10 2
: 10 3
: 10 4:10 5
: 10 6
: 10 7
: 10 8:10 9:10
10:10 11:
15 .40 .10
.25
.20 .05
.10
.10
.15
.15
.15
.05
.10
.25 .30 .25
.45
10 .40 .05
.30
.15 .05
.10
.10
.10
.15
.10
.15
.10
.15 .30 .30
.30 .;
4b.
>0 .20 .45
.05
.25 .25
.45
.25
.25
.45
.30
.20
,50
.30 .40 .55
.45 .(
*5 .60 .30
.30
.15 .35
.25
.35
.30
.30
.30
.30
.30
.35 .60 .50
.50 .:
O O td td oobdtd
A.M.
A 9:05
.00
.00
.10
.25
:05
4:05
5:05
6:05
7:05
8:05
9:05
10:05
11:05
P.M.
12:05
1:05
2:05
.05
.10
.15
.20
.05
.30
.05
.35
.25
.25
.05
.20
.10
.10
.15
.15
.10
.15
.20
.30
.35
.30
.40
.20
.25
.25
.20
,25
.25
.20
.45
. 30
.40
.30
.50
.35
.15
.20
.25
.20
.20
.30
.35
.35
.55
.35
.40
.25
Ci <-a »x» trt
TABLE XX (Continued)
5a.
M.
P.M.
9:05
10:05 11:
05
10:05
11:05
12:05
1:05
2:05
3:05
4:05
5:05
6:05
7:05
8:05
00
.20
.30
.25
.30
.25
.15
.15
.30
.10
.30
.30
.15
.20
.20
.40
00
.05
.30
.20
.20
.20
.15
.15
.25
.20
.25
.20
.20
.10
.40
.25
55.
10
.35
.55
.60
.50
.50
.20
.30
.30
.25
.35
.20
.25
.20
.40
.35
25
.35
.55
.55
.40
.40
.25
.25
.30
.30
.40
.20
.25
.25
.35
.35
A.M. p.M.
12:05
1:05
2:05
3:05
4:05
5:05
6:05
7:05
8:05
9:05
10:05
11:05
12:05
1:05
2:05
.15
.05
.25
.05
.10
.15
.20
.05
.30
.05
.35
.25
.25
.05
.20
.10
.20
.10
.10
.10
.15
.15
.10
.15
.20
.30
.35
.30
.40
.20
.25
.25
.30
.25
.25
.20
.25
.25
.20
.45
o
•o
•
.40
.30
.50
.35
.25
.25
.30
.15
.20
.25
.20
.20
.30
.35
.35
.55
.35
.40
.25
05
05
10
15
15
o bd o bd > O bd O bd > O bd Obd
live Humidity Under Cone tan t Light During the Day Period
A
A. I
5:i
11:07
A.M.
12:07
1:07
2:07
3:07
4:07 5:07
6:07
7:07
8:07
9:07
10:07
B
.(
.65
.60
.70
.75
.85
.70 1.10
.80
.90
1.00
.95
.75
C
.(
.65
.65
.80
.70
.75
.95
.95
.95
1.00
.80
.85
.75
B
.75
.65
.65
.80
.85
.85
.70
1.00
.90
1.00
.80
1.05
C
.60
.60
.80
.70
.75
.85
.85
.85
.95
.90
.90
.95
A< P.M.
A 7:3 12:01
1:01
2:01
3:01
4:01
5:01
6:01
7:01
8:01
9:01
10:01
B *5 .95
1.05
1.10
1.00
1.10
1.10
1.10
1.00
1.10
1.05
1.05
c i.oo
.85
.90
1.00
1.15
1.05
1.10
1.05
1.05
1.10
1.05
B 1.20
1.20
1.00
1.20
1.30
1.10
1.30
1.20
1.05
1.10
1.05
C 1.05
1.40
1.05
1.25
1.10
1.20
1.20
1.10
1.30
1.10
1.05
A.Jj . .
A 5:2x0:58 11:58
A.M,
3S58
1; 58
2:58
3:58
4:58
5:58
6:58
7:58
8:58 9:58
B .0 .30
.35
.40
.35
.40
.70
.55
1.15
.60
.60
.70 .70
C .0 .30
.35
.30
.35
.50
.35
1.05
1.15
.60
.65
.80 .75
B .85
.85
.70
1.00
.80
1.40
.95
1.50
1.05
1.30
1.30 1.35
C .75
.85
.85
.85
.95
.75
.90
1.50
.60
1.55
1.35 1.30
A.M A.M.
A 6:4 12:07
1:07
2:07
3:07
4:07
5:07
6:07
7:07
8:07
9:07
10:07
B .0 .50
.40
.50
.50
.60
1.00
.80
.75
.95
1.10
1.00
C .0 .55
.40
.50
.60
.45
1.15
.70
.75
1.05
1.05
1.1©
B 1.20
1.45
1.35
1.65
1.35
2.20
1.55
1.75
1.70
2.25
C 1.30
1.30
1.45
1.60
1.30
1.75
1.70
1.70
1.75
2.20
TABLE XXI
Increments of Absorption and Transpiration for phaseolus Grown at 35°C. and 75 Percent. Relative Humidity Under Constant Light During the Day period
A.M.
A 5:30 6:04
7:07
A - Time
B - Increment of Absorption
C - Increment of Transpiration.
P.M.
8:07 9:07 10:07 11:07 12:07 1:07
2:07
3:07
4:0 7
5:07
6:07
la.
7:07
B .00 .05
1.40
1.00 .95
.85 1.00 1.00 1.30
.80
1.25
.75
.95
1.00
.85
C .00 .60
1.20
1.50 1.00
. 85 1.00 .95 1.05
1.05
1.10
.80
.95
.95
1.10
B .00
.50
1.30 1.40
.75 1.35 .95 .85
1.15
1.55
1.10
.80
lb.
1.15 1.35
C .00
1.15
1.25 1.30 1
.00 1.15 .95 1.35
1.00
1.15
.90
.95
1.00
1.20
A.M.
A 7:18 7:45
8:01
9:00 10:01
P.M.
11:01 12:01 1:01 2:01
3:01
4:01
5:01
6:01
7:01
2a.
8:01
B .00 .30
.35
1.10 1.30
1.05 1.15 1.00 .85
1.10
1.05
1,05
.85
1.00
1.10
C .00 .40
.30
1.40 1.40
1.45 1.30 1.05 .85
.95
.90
.95
.35
.95
1.15
B .00
.10
1.30 1.45
1.60 1.80 1.55 1.80
1.70
1.65
1.45
1.40
1.40
2b.
1.50
C .00
.20
1.50 1.95
1.85 1.95 1.60 1.55
1.65
1.65
1.45
1.45
1.40
1.25
A.M,
A 5:22 5:58
6:58
7:58 8:53 9
P.M.
: 58 10:58 11:58 12:58
1:58
2:58
3: 58
4:58
5:58
3a.
6:58
B .00 .90
1.15
1.75 1.00 1
.35 1.45 1.85 1.35
1.10
.85
.85
.80
.90
.60
C .00 1.20
1.35
1.85 1.20 1
.45 1.75 1.40 1.00
.90
1.00
.80
.75
.90
.45
B .00
.30
.60 .60
.55 1.00 .70 1.00
.80
.85
.95
.80
1.40
3b.
.80
C .00
.25
1.05 .65
.60 .75 1.65 .80
1.40
.70
.80
.80
1.05
.80
A.M.
A 6:43 7:07
8:07
9:07 10:07
P.M.
11:07 12:07 1:07 2:07
3:07
4:07
5:07
6:07
7:07
48. «
8:07
3 ,00 .05
.40
.85 .90
1.35 1.10 1.10 .90
.70
1.10
.65
1.05
.70
.40
C .00 .20
.60
.80 1.20
1.35 1.20 .90 .95
.80
.95
.60
.70
.65
.45
B .00
.40
.40 1.20
1.40 1.60 1.70 1.40
1.40
1.60
1.40
2.00
1.30
4b.
1.35
C .00
.20
.80 1.25
1.65 1.55 1.45 1.30
1.40
1.40
1.45
1.65
1.60
1.30
A.M.
8:07
9:07 10:07 :
11:07 12:07
1:07
2:07
3:07
4:07
5:07
6:07
7:07
8:07
9:07 10:07
1.00
1.70
. 55
.65 .60
.70
.75
.35
.70
1.10
.80
.90
1.00
.95 .75
.80
.65
. 65
.65 .65
.80
.70
.75
.95
.95
.95
1.00
.80
.85 .75
1.00
1.15
.75
.75 .55
.65
.80
.85
.85
.70
1.00
.90
1.00
.80 1.05
1.00
.95
.80
.60 .60
.80
.70
.75
.85
.85
.85
.95
.90
.90 .95
P.M.
9:01
10:01
11:01
12:01 1:01
2:01
3:01
4:01
5:01
6:01
7:01
8:01
9:01
10:01
.85
1.20
.95
.95 1.05
1.10
1,00
1.10
1.10
1.10
1.00
1.10
1.05
1.05
1.00
1.30
1.00
1.00 .85
.90
1,00
1.15
1.05
1.10
1.05
1.05
1.10
1.05
1.25
1.25
.90
1.20 1.20
1.00
1.20
1.30
1.10
1.30
1.20
1.05
1.10
1.05
1.15
1 .20
.95
1.05 1.40
1.05
1.25
1.10
1.20
1.20
1.10
1.30
1.10
1.05
A.M,
»
7:58
8:58
9:58 :
10:58 11:58
3258
1: 58
2:58
3:58
4:58
5:58
6:58
7:58
8:58 9:58
.40
.40
.30
.30 .35
.40
.35
.40
.70
.55
1.15
.60
.60
.70 .70
.30
.30
.35
.30 .35
.30
.35
.50
.35
1.05
1.15
.60
.65
.80 .75
.90
.80
.70
.85 .85
.70
1.00
.80
1.40
.95
1.50
1.05
1.30
1.30 1.35
.75
.80
.75
.75 .85
.85
.85
.95
.75
.90
1.50
.60
1.55
1.35 1.30
A.M.
9:07
10:07
11:07
12:07 1:07
2:07
3:07
4:07
5:07
6:07
7:07
8:07
9:07
10:07
.60
.70
.50
.50 .40
.50
.50
.60
1.00
.80
.75
.95
1.10
1.00
.55
.75
.45
.55 .40
.50
.60
.45
1.15
.70
.75
1.05
1.05
1.10
1.45
1.75
1.35
1.20 1.45
1.35
1.65
1.35
2.20
1.55
1.75
1.70
2.25
1.40
1.35
1.30
1.30 1.30
1.45
1.60
1.30
1.75
1.70
1.70
1.75
2.20
O erf Obrf> O to O bd
Incren
Humidity Under Constant Light Luring the Lay Period
A.M.
A 5:50
B .00
C .00
B
C
A.M.
A 7:22
B .00
C .00
B
A.M.
A 6:08
7:01
.00
.00
A.M.
50 11
: 50 12:50 1
: 50 2
: 50 3
: 50 4
: 50
5:50 6
: 50 7
: 50 8
: 50 9
: 50
25
.25
.20
.20
.40
.20
.60
.45
.30
.60
.40
.40
30
.30
.20
.30
.35
.15
.50
.45
.50
.60
.55
.40
10
.30
.30
.30
.10
.50
.70
.70 1
.10
.30
.80
.80
20
.25
.25
.30
.55
.45
.85
.85 1
.00
.90
,60
.70
l.M.
2:55
1:55
2:55 3
: 55 4
: 55 5
: 55 6
: 55
7:55 8
: 55 9
: 55
.20
.20
.10
.15
.25
.20
.20
.30
.20
.15
.10
.20
.25
.15
.15
.20
.20
.25
.35
.20
.25
.15
.15
.40
.20
.25
.40
.20
.35
.30
.25
.20
.25
.20
.30
.20
.25
.35
.30
.30
A
.M.
.:27 12:27
1:27 2
: 27 3
:27 4
: 27 5
: 27
6:27 7
: 27 8
:27 9:27
.15
.15
.05
.20
.10
.20
.05
.05
.20
.15
.25
.10
.20
.10
.10
.10
.10
.10
.15
.25
.10
.25
20
.15
.20
.20-
.25
.25
.30
.25
.15
.35
.35
20
.25
.20
.20
.25
.20
.25
.20
.30
.30
.40
. :22 12:22
1:22
2:22
3:22
4:22
5:22
6:22
7:22
8:22
9:22
.25
.10
.10
.05
.20
.10
.25
.25
.05
.30
.4)
.15
.15
.15
.15
.30
.20
.25
.20
.25
.35
.35
.25
.15
.15
.15
.25
.15
.20
.20
.20
.30
.20
.15
.20
.20
.15
.25
.20
.20
.20
.20
.25
.30
TABLE XXII
increments of Absorption and Transpiration for Phaseolus Grown at 30°C. and 75 percent. Relative Humidity Under Constant Light During the Day Period.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
A.M.
A 5:50 6:30 6:50
7:50
8:50
9:50 10:50 11
ir • M •
: 50 12:50
1:50
2:50
3:50
4:50
5:50 6:50
7:50
8:50
9:50 10:50 11
Xl • lrL •
: 50 12:50
1:50
2:50
3:50
4:50
5:50 6:50
7:50
8:50 9
B .00 .20 .20
c .00 .40 .05
.20
.55
.45
.70
.50
.25
.45
.40
.20
.40
.30
.20
.20
.25
.20
.25
.25
.20
.20
.40
.20
.60
.45 .30
.60
.40
.45
.75
.50
.90
.45
.40
.45
.35
.30
.20
.30
.30
.25
.30
.25
.30
.30
.20
.30
.35
.15
.50
.45 .50
.60
. 55
B .00
.10
.40
.30
.30
.30
.25
.35
.30
.25
.05
lb.
.40 .15
.05
.35
.25
.10
.30
.30
.30
.10
.50
.70
.70 1.10
.80
.80
c .00
.40
.20
.35
.30
.25
.30
.25
.20
.25
.25
.20
.20
.25
.25
.25
.20
.25
.25
.30
.55
.45
.85
.85 1.00
.90
.60
A.M.
A 7:22 7:55 8:55
9:55
10:55
11:55
P.M.
12:55
1:55
2:55
3:55
4:55
5:55
6:55
2a.
7:55 8:55
9:55
10:55
11:55
A.M.
12:55
1:55
2:55
3:55
4:55
5:55
6:55
7:55 8:55
9:55
B .00 .20 .05
.40
.50
.50
.20
.20
.50
.20
.20
.30
.20
.10
.30
.15
.05
.20
.20
.20
.10
.15
.25
.20
.20
.30 .20
.15
C .00 .15 .35
.50
.40
.35
.35
.30
.30
.20
.20
.25
.20
.20
.15
.20
.10
.20
.10
.20
.25
.15
.15
.20
.20
.25 .35
.20
B .00 .00
.45
.35
.40
.40
.35
.35
*.05
.40
.20
.15
2b.
.25 .30
.20
.10
.25
.25
.15
.15
.40
.20
.25
.40
.20 .35
.30
.45
.45
.40
.35
.35
.25
.30
.25
.25
.25
.20
.20
.15
.15
.25
.15
.25
.20
.25
.20
.30
.20
.25
.35 .30
.30
A.M.
A 6:08 6:27 7:27
8:27
9:27
10:27
P .M.
11:27 12:27
1:27
2:27
3 : 2.7
4:27
5:27
3a.
6:27 7:27
8:27
9:27
10:27
A.M.
11:27 12:27
1:27
2:27
3:27
4:27
5:27
6:27 7:27
8:27
9:27
B .05 .10
.30
.25
.55
.25
.60
.10
.00
.20
.25
.20
,15
.20
.15
.15
.05
.15
.15
.05
.20
.10
.20
.05
.05 .20
.15
.25
C .15 .20
.55
.25
. 35
.35
.65
.30
.25
.25
.15
.20
.15
.15
.15
.10
.10
.10
.20
.10
.10
.10
.10
.10
.15 .25
.10
.25
B .00 .30
.50
.65
.50
.45
.50
.55
.40
.45
.40
.25
3b.
.15 .25
.25
.35
.20
.20
.15
.20
.20.
.25
.25
.30
.25 .15
.35
.35
C .00 .00
.55
.55
.50
.50
.45
.50
.40
.35
.30
.25
.20
.25
.25
.15
.20
.20
.25
.20
.20
.25
.20
.25
.20 .30
.30
.40
A 7:01 7:18 7:22
8:22
9:22
10 : 22
11:22 12:22
1:22
2:22
3:22
4:22
5:22
4a.
6:22 7:22
8:22
9:22
10:22
11:22 12:22
1:22
2:22
3:22
4:22
5:22
6:22 7:22
8:22
9:22
B .00 .05 .05
.60
.30
.60
.30
.25
.55
.25
.25
.30
.20
.20
.10
.20
.25
.05
.25
.10
.10
.05
.20
.10
.25
.25 .05
.30
.4)
C .00 .20
.35
.45
.30
.45
.35
.40
.25
.25
.20
.25
.15
.15
.15
.20
.10
.15
.15
.15
.15
.30
.20
.25
.20 .25
.35
.35
B .00 .05
C .00
.35
.30
.70
.30
.30
.35
.35
.30
.25
.25
4b.
.00 .20
.20
.30
.50
.25
.15
.15
.15
.25
.15
.20
.20 .20
.30
.20
.30
.35
.35
.40
.40
.30
.25
.20
.20
.20
.15
.15
.15
.20
.10
.15
.20
.20
.15
.25
.20
.20
.20 .20
.25
.30
: 50
.40
.40
.30
.70
PQWOO WPQOO < fq fqo O fflpqoo <J WfflOO WWOU C WWO o WWOO
Incr
Humidity Under Constant Light During the Day Period
A.M.
A 6:52
A.M*
8:57
.00
.00
A.M.
6:27
.00
.00
A.M.
8:33
.00
.00
e
.M.
,3:22
1:22
2:22
3:22
4:22
5:22
6:22
7:22
8:22 9
: 22 10:22 11:22
.20
.15
.10
.25
.10
.15
.20
.30
.10
.40 .15
.45
.15
.20
.15
.15
.15
.20
.20
.20
.25
.35 .20
.25
.20
.30
.15
.45
.30
.35
.45
.60
.45
.55 .45
.65
.25
.25
.40
.20
.45
.40
.40
.45
. 55
.35 .70
.60
o
to
• •
CO
3:30
4:30
5:30
6:30
7:30
8:30
9:30
10:30
P.M.
11:30 12:30
1:30
.20
.10
.20
.15
.20
.10
.25
.20
.30
.20 .50
.50
.15
.15
.15
.15
.20
.10
.25
.35
.45
.40 .45
.35
.30
.10
.30
.30
.40
.40
.30
.50
.50
.60 .60
.60
.30
.25
.25
.30
.35
.35
.40
.55
.50
.50 .50
.50
A.M.
j: 56 12:56
1:56
2:56
3:56
4:56
5:56
6:56
7:56 8
: 56 9:56 10
: 56
.20
.35
.10
.25
.20
.20
.30
.30
.50
.40 .25 .
45
.25
.20
.30
.10
.2§
.35
.40
.70
.40
.40 .35 .
40
.10
.30
.10
.15
.20
.20
.20
.30
.50
.50 .40 .
40
.20
.15
.15
.10
.20
.05
.60
.35
.45
.40 .45 .
35
2:01
3:01
4:01
5:01
6:01
7:01
8:01
9:01
10:01
P.M.
11:01 12:01
1:01
.30
.10
.10
.40
.20
.20
.20
.30
.20
.45 .15
.30
.25
.15
.20
.30
.10
.20
.20
.35
.30
.25 .25
.25
.30
■
.10
.05
.15
.10
.10
.15
.05
.25
. .05 .25
.15
.10
.15
.10
.10
.00
.05
.10
.20
.15
.05 .20
.05
m fpo o w n o o ■< w fp o o nnuu •< wwoo wwoo -c wwo o ,“'fl ° 1
TABLE XXIII
Increments of Absorption and Transpiration for phaseolus Grown at 25°0. and 75 percent Relative Humidity Under Constant Light During the Day period.
A - Time
B - Increment of Absorption
C - Increment of Transpiration
la.
A.M.
P
'.M.
6:52
7
:20
8:22 9:22 1C
1:22 11:22 12:22
1:22
2:22
3:22
4:22
5:22
6:22
7:22
8:22
.00 .20
.40 .20
.50
.45
.25
.40
.40
.20
.30
.15
.10
.25
.25
.40
.30
*00 .25
.30 .35
.50
.40
.40
.45
.25
.20
.30
.10
.15
.40
.35
.30
.25
lb.
.00
.25 .20
.10 .20
.30
.35
.35
.20
.40
.40
.20
.20
.25
.50
.55
.45
.55
.00
.60 .25
.15 .20
.35
.45
.45
.35
.25
.25
.30
.10
.30
1.00
.50
.40
.60
A.M.
P.M.
2a.
8:57
9
: 30
10:30 11:30
12:30 1:30
2:30
3:30
4:30
5:30
6:30
7:30
8:30
9:30
10:30
.00
.40
.45 .35
.30 .70
.25
.05
.20
.30
.10
.20
.30
.10
.05
.20
.45
.00
.50
.25 .45
.45 .35
.35
.15
.20
.10
.25
.20
.15
.15
.20
.40
.30
2b.
.00
.65 .40
.75 .50
.45
.45
.20
.55
.25
.40
.20
.30
.10
.35
.65
.00
.45 .55
.50 .60
.20
.30
.45
.45
.40
.20
.35
.25
.25
.50
.50
A.M.
P
1 .M.
3a.
6:27
6
: 53
7:56 8:56 9:
56 10:56 11
: 56 12:56
1:56
2:56
3:56
4:56
5:56
6:56
7:56 i
.00
.05
.45 .40 .
35 .55
.45
.45
.40
.60
.20
.40
.20
.20
.20
.40
.50
.30
.30
.00
.45 .30 .
05 1.05
.60
.45
.50
.45
.30
.30
.15
.25
.15
.45
.50
.25
.35
3b.
.00
.05 .80 .
03 .45
.25
.25
.40
.45
.30
.10
.10
.20
.10
.50
.60
.30
.40
.20 .20 .
30 .20
.45
.40
.35
.40
.15
.20
.15
.15
.10
.60
.55
.30
.45
A.M.
P.M.
4a.
8:33
9
: 00
10:01 11:01
12:01 1:01
2:01
3:01
4:01
5:01
6:01
7:01
8:01
9:01
10:01
o
o
.05
.05 .30
.30 .35
.45
.20
.30
.20
.15
.05
.20
.15
.05
.00
.10
.40
.15
.25 .30
.40 .40
.25
.30
.25
.15
.15
.10
.15
.10
.20
.20
.25
4b.
.00
.50 .30
.10 .20
.20
.20
.10
.10
.30
.10
.00
.00
.20
.10
.35
.00
.25 .15
.25 .20
.15
.15
.20
.05
.10
.05
.10
.05
.10
.15
.10
A.M.
: 22 10:22 11
. : 22 12:22
1:22
2:22
3:22
4:22
5:22
6:22
7:22
8:22 9
: 22 10:22 11:22
.10 .10
.25 .20
.15
.10
.25
.10
.15
.20
.30
.10
.40 .15
.45
.15 .15
.15 .15
.20
.15
.15
.15
.20
.20
.20
.25
.35 .20
.25
.20 .25
.20 .20
.30
.15
.45
.30
.35
.45
.60
.45
.55 .45
.65
.15 .30
.15 .25
.25
.40
.20
.45
.40
.40
.45
.55
.35 .70
.60
A.M.
11:30 12:30
1:30 2:30
3:30
4:30
5:30
6:30
7:30
8:30
9:30
10:30
P.M.
11:30 12:30
1:30
.20 .05
.20 .20
.10
.20
.15
.20
.10
.25
.20
.30
.20 .50
.50
.20 .15
.15 .15
.15
.15
.15
.20
.10
.25
.35
.45
.40 .45
.35
.25 .35
.30 .30
.10
.30
.30
.40
.40
.30
.50
.50
.60 .60
.60
.25 .25
.35 .30
.25
.25
.30
.35
.35
.40
.55
.50
.50 .50
.50
: 56 9:56 10:
A.M.
56 11:56 12:56
1:56
2:56
3:56
4:56
5:56
6:56
7:56 8
: 56 9:56 10
: 56
.20 .20
20 .20
.35
.10
.25
.20
.20
.30
.30
.50
.40 .25 .
45
.25 .20
25 .25
.20
.30
.10
.2§
.35
.40
.70
.40
.40 .35 .
40
.20 .10
15 .10
.30
.10
.15
.20
.20
.20
.30
.50
.50 .40 .
40
.15 .15
15 .20
.15
.15
.10
.20
.05
.60
.35
.45
.40 .45 .:
35
A.M.
11:01 12:01
1:01 2:01
3:01
4:01
5:01
6:01
7:01
8:01
9:01
10:01
P.M.
11:01 12:01
1:01
.20 .20
.20 .30
.10
.10
.40
.20
.20
.20
.30
.20
.45 .15
.30
.25 .15
.10 .25
.15
.20
.30
.10
.20
.20
.35
.30
.25 .25
.25
.05 .10
.00 .30
.10
.05
.15
.10
.10
.15
.05
.25
. .05 .25
.15
.15 .15
.10 .10
.15
.10
.10
.00
.05
.10
.20
.15
.05 .20
.05
Inc
e Humidity Under Constant Light During the Day period.
A.M.
A.
M.
A
6:18
55 11:55 12
: 55
1:55
2:55
3:55
4:55
5:55
6:55
7:55
8:55
9:55
B
.00
30 .10
.30
.30
.10
.30
.20
.10
.10
.10
.30
.30
P
c
c
.00
20 .20
.25
.20
.20
.25
.20
.20
.20
.20
.30
.40
B
15 .20
.20
.25
.30
.25
.15
.05
.10
.10
.30
.40
3
C
c
0 . 20
.20
.20
.20
.20
.20
.05
.10
.20
.15
.35
A
5:30
50 11:50 12
: 50
1:50
2:50
3:50
4:50
5:50
6:50
7:50
8:50
9:50 10:3p
B
.00
05 .30
.30
.05
.25
.10
.20
.35
.15
.30
.35
.35 .35
C
.00
20 .20
.20
.20
.20
.15
.30
.10
.25
.30
.30
.25 .40
B
30 .10
.20
.40
.35
.35
.30
.30
.30
.30
.50
.25 .50
C
25 .30
.30
.25
.25
.30
.30
.20
.30
.40
.50
. 30 . 45
A.M.
A.M.
A
5:45
:02 12:02 1
: 02
2:02
3:02
4:02
5:02
6:02
7:02
8:02
9:02
10:02
B
.00
.10 .10
.30
.20
.20
.20
.20
.20
.30
.25
.25
.30
C
.00
.10 .20
.30
.10
.15
.15
.25
.20
.30
.25
.30
.25
B
.15 .20
.10
.20
.10
.10
.15
.25
.20
.25
.45
.25
C
.10 .15
.10
.15
.20
.15
.15
.20
.30
.25
.25
.25
A.M.
l.M,
A
6:36
2:06 1:06 2
:06
3:06
4:06
5:06
6:06
7:06
B
.00
.15 .10
.10
.10
.10
.10
.10
.15
C
.00
.10 .10
.10
.10
.10
.10
.05
.20
B
.15 .10
.20
.15
.20
.15
.20
.15
C
.20 .10
.15
.15
.20
.15
.15
.15
OOtdW
TABLE XXIV
increments of Absorption and Transpiration for phaseolus Grown at 20°C. and 75 percent Relative Humidity Under Constant Light During the Day period.
A.M.
A 6:18
B .00
p
c .00
c
A 5:30
B .00
C .00
B
C
A.M.
A 5:45
B .00
C .00
B
C
A.M.
A 6:36
B .00
C .00
B
C
A
- Time
B
- Increment
of At
isorpti
on
C
- increment
of Transpiration.
P.
M.
6:45
6:55
7:55
8:55 9
: 55 10
> : 55 11
: 55 12
: 55
.05
.00
.80
.40
.20 .
40
.10
.40
•
65
.45
.30
.10
.40
.30
.35 .
25
.35
.40
•
40
.40
o
o
•
.05
.20
.15
.40 .
30
.05
.35
65
.45
.00
.05
.40
.20
.25 .
20
.20
.15
•
15
.30
5:50
6:50
7:50
8:50 9
;50 10
:50 11
:50 12
: 50
.00
.50
.30
.30
.40
.20
.10
.35
.15
.25
.30
.30
.25
.30
.30
.40
.00
.75
.35
.35
.40
.25
.40
.30
.00
.25
.40
.30
.35
.30
.30
.30
P
.M.
6:02
7:02
8:02
9:02 10:02 11:02 12:02 1
:02
.00
.30
.50
.20
.35
.25
.30
.20
.10
.30
.35
.30
.25
.30
.30
.30
.00
.20
.15
.20
.05
.15
.05
.20
.00
.20
.15
.10
.15
.15
.15
.20
P.M.
7:06
8:06
9:06
10:06
11:06
12:06
1:06 2
:06
.15
.15
.10
.10
.25
.10
.15
.20
.10
.10
.20
.10
.05
.25
.10
.20
.00
.30
.30
.10
.05
.02
.35
.20
.00
.30
.20
.15
.25
.15
.15
.15
la. A.M.
1:55
2:55
3:55
4:55
5:55
6:55 7
: 55
8:55
9:55
10:55
11:55
12:55
1:55
2:55
3:55
4:55
5: 55
6:55
7:55
8:55
9:55
.40
.40
.35
.35
.65
.25
.05
.30
.35
.30
.10
.30
.30
.10
.30
.20
.10
.10
.10
.30
.30
.40
.45
.40
.40
.35
.25
.20
.30
.20
.20
.20
.25
.20
.20
.25
.20
.20
.20
.20
.30
.40
lb.
.20
.20
.35
.20
.15
.25
.20
.15
.15
.15
.20
.20
.25
.30
.25
.15
.05
.10
.10
.30
.40
.25
.25
.25
.20
.25
.15
.20
.20
.20
.20
. 20
.20
.20
.20
.20
.20
.05
.10
.20
.15
.35
2a.
1 : 50
2:50
3:50
4:50
5:50
6:50 7
: 50
8:50
9:50
10:50
11:50
12:50
1:50
2:50
3:50
4:50
5:50
6:50
7:50
8:50
9:50 10:$
.35
.35
.35
.30
.35
.25
.25
.05
.35
.05
.30
.30
.05
.25
.10
.20
.35
.15
.30
.35
.35 .35
.30
.35
.35
.30
.35
.20
.20
.20
.15
.20
.20
.20
.20
.20
.15
.30
.10
.25
.30
.30
.25 .40
2b.
.30
.35
.45
.30
.35
.40
.25
.30
.30
.30
.10
.20
.40
.35
.35
.30
.30
.30
.30
.50
.25 .50
.35
.40
.40
.30
.40
.20
.30
.30
.25
.25
.30
.30
.25
.25
.30
.30
.20
.30
.40
.50
.30 .45
3a. A.M.
2:02 ,
3:02
4:02
5:02
6:02
7:02 8
:02
9:02
10:02 11
. :02
12:02
1:02
2:02
3:02
4:02
5:02
6:02
7:02
8:02
9:02
10:02
.30
.20
.25
.15
.25
.20
.20
.10
.25
.10
.10
.30
.20
.20
.20
.20
.20
.30
.25
.25
.30
.25
.20
.25
.30
.15
.20
.15
.20
.20
.10
.20
.30
.10
.15
.15
.25
.20
.30
.25
.30
.25
3b.
.20
.10
.05
.20
.10
.10
.15
.10
.15
.15
.20
.10
.20
.10
.10
.15
.25
.20
.25
.45
.25
.05
.10
.15
.20
.10
.10
.20
.15
.10
.10
.15
.10
.15
.20
.15
.15
.20
.30
.25
.25
.25
4a. A.M.
3:06
4:06
5:06
6:06
7:06
8:06 9
: 06
10:06
11:06
12:06
1:06
2:06 3:06 -
4:06
5:06
6:06
7:06
.20
.20
.15
.05
.05
.15
.05
.10
.05
.15
.10
.10
.10
.10
.10
.10
.15
.10
.10
.20
.10
.05
.05
.05
.15
.10
.10
.10
.10
.10
.10
.10
.05
.20
4b.
.15
.05
.10
.25
.15
.10
.10
.10
.10
.15
.10
.20
.15
.20
.15
.20
.15
.15
.15
.15
.05
.10
.15
.20
.20
.10
.20
.10
.15
.15
.20
.15
.15
.15
ed)
A
A.M.
5:45
: 57 11:57
A.M,
12:57 1:57 2:57
B
.00
.25
.25
.00 .20 .20
C
.00
.15
.10
.05 .15 .20
B
.05
.30
.25 .30 .30
C
.15
.25
.25 .35 .25
A
A.M.
7:02
1:02
2:02
3:02 4:02 5:02
B
.00
.20
.20
.20 .35 .20
C
.00
.25
.30
.20 .30 .25
57
4:57
5:57
6:57
7:57
8:57
9:57
05
.20
.05
.20
.25
.10
.20
10
.10
.15
.20
.25
.15
.10
30
.30
.50
.30
.30
.55
.35
30
.30
.35
.30
.40
.30
.30
02
7:02
8:02
9:02
10:02
35
.40
.20
.40
.25
25
.35
.40
.25
.20
TABLE XXIV (Continued)
A.M.
A 5*-45
B .00
c .00
B
C
A.M.
A ?:02
B .00
C .00
5a .
p.M. A.M.
: 15
6:57
7:57
8:57 '
9:57
10:57
11:57
12:57
1:57
2:57
3:57
4:57
5:57
6:57
7:57
8:57
9:57
10:57
11:57
12:57
1:57
2:57 ;
3:57
4:57
5:57
6:57
7:57
8:57 1
9:57
.00
.20
.05
.35
.25
.30
.20
.05
.20
.20
.10
.20
.30
.10
.10
.25
.00
.25
.25
.00
.20
.20
.05
.20
.05
.20
.25
.10
.20
.10
.05
.40
.15
.20
.20
.20
.10
.20
.20
.10
.15
.20
.20
.15
.20
.15
.15
.10
.05
.15
.20
.10
.10
.15
.20
.25
.15
.10
.00
.00
.25
.20
.15
.20
.30
.15
.15
.30
.15
.40
.30
5b.
.25
.30
.35
.25
.05
.30
.25
.30
.30
.30
.30
.50
.30
.30
.55
.35
.00
.20
.40
.20
.25
.20
.15
.15
.20
.30
.30
.30
.25
.15
.30
.30
.35
.15
.25
.25
.35
.25
.30
.30
.35
.30
.40
.30
.30
6b.
P.M. A.M.
:02
9:02
10:02
11:02
12:02
1:02
2:02
3:02
4:02
5:02
6:02
7:02
8:02
9:02
10:02
11:02
12:02 ;
1:02
2:02
3:02
4:02
5:02
6:02
7:02
8:02
9:02
10:02
.40
.20
.30
.10
.10
.30
.20
.20
.20
.05
.25
.15
.20
.15
.30
.20
.35
.20
.20
.20
.35
.20
.35
.40
.20
.40
.25
.30
.25
.25
.20
.15
.15
.20
.26
.10
.20
.20
.20
.15
.25
.20
.25
.30
.25
.30
.20
.30
.25
.25
.35
.40
.25
.20
Incr^ Humidity Under Constant Light During the Day Period.
A
A.M.
9:20
2:50
3:50
4:50
5:50
6:50
7:50
8:50
9:50
10:50
11:
50
P.
12
M.
5: 50 1
:50
B
P
.00
.05
.05
.05
.05
.30
.05
.05
.10
.10
10
.20
.10
C
C
.00
.05
.05
.10
.10
.05
.05
.05
*.05
.15
•
10
.15
.15
B
p
.10
.20
.10
.10
.25
.05
.15
.20
.35
•
10
.45
.30
c
c
.20
.05
.20
.10
.10
.20
.15
.20
. 25
•
25
.40
.25
A.M.
3:12
p
A
9:55
4:12
5:12
6:12
7:12
8:12
9:12
10:12
11:12
12
:12 l
: 12 2
: 12
B
p
.00
.10
.05
.20
.10
.10
.10
.10
.20
.20
.20
.15
.15
JLs
C
c
.00
.15
.05
.15
.10
.10
.15
.15
. 20
.15
.20
.20
.20
B
p
.25
.15
.10
.30
.25
.25
.20
.25
.25
.30
.45
.35
JJ
C
c
.20
.15
.25
.20
.25
.20
.15
.30
.35
.35
.30
.35
A.M.
:12 11
A
.M.
A
4:45
: 12 12:12
1:12
2:12
3:12
4:12
5:12 t
>:12 7;
.12
8:
12
9:12
B
.00
.20
.15
.00
.20
.20
.10
.15
.10
.10
.15
•
30
.20
C
.00
. 15
.10
.10
.20
.15
.10
.15
.10
.20 ,
.15
•
20
.30
B
.25
.30
.05
.30
.05
.20
.45
.10
.40 .
30
•
55
.30
C
.30
.10
.25
.15
.30
.40
.40
.25
.35 .
35
•
35
.40
A «M .
A
.M.
A
6:24 :
L:15 12:15 1:15
2:15
3:15
4:15
5:15
6:15 7
: 15 8:
15
9:
15
B
.00
.05
.05
.15
.05
.15
.10
.15
.10
.30 .
20
•
30
C
.00
• 15
.15
.10
.10
.10
.15
.05
.15
.15 .
25
0
15
B
.05
.25
.10
.30
.25
.05
.25
.30
.25 .
35
•
30
C
.25
.20
.20
.15
.20
.25
.65
.35
.20 .
30
•
25
ff TABLE XXV.
increments of Absorption and Transpiration for phaseolus Grown at 15°C. and 75 Percent. Relative Humidity Under Constant Light Luring the Day Period.
A - Time
B - Increment of Absorption
C - Increment of Transpiration.
A.M.
A 9:20 9:50
P .M.
10:50 11:50 12:50 1:50 2:50
3:50
4:50
5:50
6:50
7:50
8:50
9:50
10:50 11:50 12:50 1:50 2:50 3:50
4:50
5:50
6:50
7:50
8:50
P .M.
9:50 10:50 11:50 12:50 1
B .00 .45
TJ
.00 .05 .30 .20 .00
.10
.20
.10
.10
.30
.10
.05
.05 .10 .10 .00 .05 .05
.05
.05
.30
.05
.05
.10
.10 .10 .20
.10
.20
.20
c .00 .40
c
.05 .10 .15 .20 .25
.05
.20
.10
.20
.10
.10
.20
.05 .00 .15 .10 .05 .05
.10
.10
.05
.05
.05
*.05
.15 .10 .15
.15
.10
.20
lb.
B *00
B
.25 .20 .40 .70 .55
.15
.35
.05
.25
.10
.10
.15
.25 .10 .25 .10 .10 .20
.10
.10
.25
.05
.15
.20
.35 .10 .45
.35
.25
.30
c .00
.40 .50 .50 .40 .60
.20
.25
.15
.25
.10
.20
.20
.15 .15 .25 .10 .20 .05
.20
.10
.10
.20
.15
.20
. 25 .25 .40
c
.35
.25
.25
A.M.
P.M.
2a . A.M.
P.M.
A 9:55 10:25
11:12 12:12 1:12 2:12 3:12
4:12
5:12
6:12
7:12
8:12
9:12
10:12
11:12 12:12 1:12 2:12 3:12 4:12
5:12
6:12
7:12
8:12
9:12
10:12
11:12 12:12 1:12 2
B .00
.45 .40 .20 .20 .00
.25
.15
.20
.10
.10
.15
.15
.10 .10 .10 .15 .10 .05
.20
.10
.10
.10
.10
.20
.20 .20 .15
E
.25
.25
.20
C .00
.45 .15 .10 .20 .15
.40
.15
.15
.10
.10
.10
.10
. 10 .10 .10 .10 .15 .05
.15
.10
.10
.15
.15
. 20
.15 .20 .20
c
.15
.15
.15
2b.
B .00
.40 .60 .20 .20 .35
.20
.15
.20
.20
.10
.10
.25
.05 , 15 .25 .15 .25 .15
.10
.30
.25
.25
.20
.25
.25 .30 .45
E
.30
.30
.40
C .00
.95 .15 .10 .30 .15
.30
.30
.20
.20
.10
.10
.15
.15 .20 .25 .25 .20 .15
.25
.20
.25
.20
.15
.30
. 35 .35 . 30
c
.30
.20
.45
A.M.
P
.M.
3a. A
.M.
A 4:45 5:12
6:12 7:12 8:12 9:12 10:12 11
: 12 12:12
1:12
2:12
3:12
4:12
5:12
6:12 7:12 8:12 9:12 10:12 11:12 12:12
1:12
2:12
3:12
4:12
5:12 6
:12 7:12 8:12 9:12
B .00 .00
.25 .15 .05 .15 .30
.15
.15
.15
.10
.30
.25
.10
.20 .20 .10 .05 .20 .15
.00
.20
.20
.10
.15
.10
.10 .15 .30 .20
c .00 .05
.10 .15 .10 .15 .25
.10
.15
.25
.20
.20
.15
.20
.15 .10 .15 .15 .15 .10
.10
.20
.15
.10
.15
.10
.20 .15 .20 .30
B .00
C .00
.00 .00 .05 .15 .30
3b.
.35
.05
.25
.30
.35
.10
.20
.15 .10 .15 .05 .25 .30
.05
.30
.05
.20
.45
.10
•40 .30 .55 .30
.10 .30 .30 .10 .25
.20
.20
.25
.25
.25
.25
.20
.20 .15 .20 .15 .30 .10
.25
.15
.30
.40
.40
.25
.35 .35 .35 .40
A.M.
P
.M.
4a. A.M.
A 6:24 6 : 45
7:15 8:15 9:15 10:15 11:15 12:15
1:15
2:15
3:15
4:15
5:15
6:15
7:15 8:15 9:15 10:15 11:15 12:15
1:15
2:15
3:15
4:15
5:15
6:15 7
: 15 8:15 9:15
B .00 .00
C .00 .00
.00 .25 .25 .30 .30
.20
.05
.25
.20
.25
.05
.20
.10 .15 .25 .10 .05 .05
.15
.05
.15
.10
.15
.10
.30 .20 .30
.20 .25 .20 .20 .15
.20
.20
.15
.20
.25
.15
.10
.15 .15 .30 .20 .15 .15
.10
.10
.10
.15
.05
.15
.15 .25 .15
B .00
.00
.00 .00 .30 .35 .35
.05
.25
.05
.05
.20
.10
.30
4b.
.00 .05 .25 .30 .05 .25
.10
.30
.25
.05
.25
.30
. 25 .35 . 30
.50 .40 .30 .20
.20
.15
.10
.15
.20
.20
.10
.15 .25 .55 .20 .25 .20
.20
.15
.20
.25
.65
.35
.20 .30 .25
50
10
15
30
25
12
15
20
35
35
Incite Humidity Under Constant Light Luring the Day Period
A.M.
A 6:45
B .00
B
C .00
c
B
B
C
c
A.M.
A 8:12
B .00
B
C .00
c
B
B
C
A.M.
10
12:10 1:10
2:10 3:10
4:10 5:10
6:10
7:10
8:10
9:10 10:10
20
.05 .20
.05
.20
.05
.20
.05
.20
.30
.45 .30
15
.10 .15
.10
.10
.15
.15
.15
.10
.40
.40 .35
05
.30 .15
.30
.35
.30
.30
.35
.25
.50
.45 .50
10
.20 .30
.25
.25
.30
.35
.30
.35
.35
.45 .45
: 15
2:15 3:15
4:15 5:15
6:15 7:15
8:15
9:15
10:15
P.M.
11:15 12:15
.40
.05 .25
.20
.10
.15
.25
.35
.30
.40
.35 .40
.20
.20 .20
.20
.20
.15
.15
.25
.40
.55
.50 .40
.40
.10
.50
.40
.20
.55
.55
.60
.50
.60
.50
.60
.30
.30
.40
.40
.35
.50
.60
.50
.50
.55
. 50
.50
C“» be* brt
TABLE XXVI
r
T’iorements of Absorption and Transpiration for phaseolus Grown at 15°C. and 25 percent. Relative Humidity Under Constant Light During the Day Period.
A - Time
B - Increment of Absorption
C - Increment of Transpiration.
Ji.
P.M,
45
7:10
7:35
8:10
9:10
10:10
11:10
12:10
1:10
2:10
00
.05
.00
.25
.50
.20
.40
.05
.25
.20
.50
.25
.20
.40
00
.40
.05
.15
.40
.30
.25
.25
.20
.30
.30
.35
.40
.30
o
o
o
o
•
.10
.40
.60
.45
.15
.25
.25
.30
.50
.50
.40
o
o
to
o
.40
.60
.55
.35
.35
.20
.25
.45
.40
.45
.45
A.M. P.M.
A 8:12
8:50 9:15
10:15
11:15
12:15
1:15
2:15
3:15
4:15
B .00
.20 .20
.35
.30
.30
.10
.20
.10
.30
B
.50
.50
.30
.55
C .00
.70 .10
.30
.35
♦ 10
.20
.10
.20
.20
c
—
.50
.50
.50
.45
B
.00
.10
.60 .55
.55
.60
.20
.10
.15
B
.40
.45
.55
.50
C
o
o
.60
1.00 .60
.45
.35
.30
.25
.25
C
.50
.60
.50
.50
3:10
4:10
5:10
6:10
7:10
8:10 9
: 10 10
| : 10 11:10
12:10
.25
.30
.25
.20
.25
.20
.20
.05 .20
.05
.60
.20
.45
.20
.30
.25
.15
.30
.10
.15
.10 .15
.10
.35
.35
.30
lb.
.20
.10
.20
.10
.35
.15
.10 .
15 .05
.30
.45
.40
.50
.20
.15
.20
.15
.20
.20
.20
.10 .10
.20
.50
.40
.40
2a.
A.M.
5:15
6:15
7:15
8:15
9:15
10:15
11:15
12:15 1:15
2:15
.20
.15
.20
.35
.20
.10
.25
.15 .40
.05
.35
.25
.25
.20
.35
.15
.15
.20
.20 .20
.20
.45
2b.
*
.45
.10
.10
.30
.15
.10
.35
.30 .40
.10
.50
.20
.25
.20
.25
.15
.20
.30
.35 .30
.30
.50
: 10
2: 10
3:10
4:10
5:10
6:10
7:10
8:10
9:10
10:10
.20
.05
.20
.05
.20
.05
.20
.30
.45
.30
.15
.10
.10
.15
.15
.15
.10
.40
.40
. 35
.15
.30
.35
.30
.30
.35
.25
.50
.45
.50
.30
.25
.25
.30
.35
.30
.35
.35
.45
.45
: 15 4:15 5:15
6:15 7:15
8:15 9:15
10:15
11:15
P.M.
12:15
.25 .20 .10
.15
.25
.35
.30
.40
.35
.40
.20 .20 .20
.15
.15
.25
.40
.55
.50
.40
.50
.40
.20
.55
.55
.60
.50
.60
.50
.60
.40
.40
.35
.50
.60
.50
.50
.55
.50
.50
E XXVII
*Y OE TABLES.
Tab!5
35°C.k
light
Tabl o
30 C.tf
light
Tab£
25°C . ^7
light
Tabl <7
(20°C.‘)
(lisht
Tabl<
15°C.
light [)
(
)
05
G
g
CP
o
O CP
P
•H
•H P
c g
P TO
-P c
o rt
Ctf P
crt «J
•H rH
P G
^ rH
•P Pi
•H 0}
•H P,
P,
P..H
PH ^
U W
TO P,
a tiT
o c
G
C G
m G
nj tJ
aJ G
,Q o
P rH
u o
Eh >h
Eh O
Table XXI . la, lb
( 35°C • 75$R .H . ) 2a, 2b
Average
Table XXII. 2a, 2b
(30°C.75 % R.H. ) la, lb
(light constant ) 3a, 3b
4a, 4b
Average
Table XXIII. la, lb
25°C . 75 % R.H.) 2a, 2b
light constant ) 4a, 4b
3a, 3b
Average
Table XXIV.
la, lb
2a , 2b
20 C. 75^ R.H.) 3a, 3b
light constant ) 4a, 4b
5a , 5b
6b
Average
la, lb
Table XXV. 2a, 2b
( 15°C. 75^ R.H.)
(light constant ) 3a, 3b
4a, 4b
Average
Table XXVI. la, lb
(15 C.25# R.H.) 2a, 2b
(light constant)
15 . 35
25.05
32.70
il.05
20.95
22.15
.6.70
17.65
23.60
.8.80
18.85
36.10
5.45
5.65
6.10
9.05
8.10
9.85
4.40
4.55
7.05
5.70
5.60
5.30
5.90
5. 70
7.45
5.20
5.10
8.55
5.25
5.25
3.00
8.10
7.30
5.90
6.55
6.70
4.75
6.05
6.00
7.55
5.25
5.30
3.75
2.75
2.95
3.85
3.70
3.90
6.45
5.30
2. 55
2,50
5.10
3.35
3.30
5.20
3.95
3.90
5.70
3.90
3.90
5.35
4.80
4.65
6.40
5.15
5.30
8. 75
c
O ID
•H -P
-P c
03
c c
c
c
•H
■P 03
C 03
d
d
sq.inch
sq. inch
a! d
O (t
d -P
O -p
e.
e,
*— 1
•H rH
U G
•P c
03
03
0) bC
0)
tH P-,
-P ft
-h d
-p d
El
El
ftC
ft
fX
ft
ft rH
ft rH
<: br
C
• 3
• "3
ro bC
E, bC
03 ft
E ft
c
03 o
03 rH
C c
O C
c
o
<M 3
Eh
CtH
g o
cd p
03 3
d
03 Xi
d o
d pi
d
d
P o
.ft O
Jh rH
.ft H
0> tH
03 O
Ei
e,
Eh
C
Eh O
< O
Pi
Eh
Eh
Table XVI
Average
la, lb
Table XVII.
30°C.45$R.H. )
Average
la, lb
Table XVIII. 3a, 3b
25°C.45$R.H.) 2a ,2b
light constant) 4a, 4b
5a, 5b
Average
la, lb
Table XIX. 2a, 2b
20°C. 45$ R.H.) 3a, 3b
light constant) 4&, 4b
Average
la, lb
Table XX. 2a, 2b
15°C . 45$ R.H.)
light constant) 3a, 3b
4a , 4b
5a, 5b
Average
16.20
16.05
22.82
.70
.
16.75
16.70
48.80
47.25
21.49
47.00
. 77
1.03
16.25
15.60
43.45
43.20
21.48
47.97
.75
.90
11.95
11.80
30.25
30.25
18.37
38.94
.65
.77
.71
.90
8.20
8.00
17.90
17.15
16.66
37.26
.49
.48
12.60
12.80
15.95
15.75
20.07
40.23
.62
.39
12.90
12.70
17.70
17.60
24.47
43.80
.52
.40
13.45
14.05
11.90
11.60
25.82
38.67
.52
.30
'.'53'
.39
8.70
8.60
11.00
11.50
25.00
39.25
.34
.28
6.45
6.30
12.50
11.90
24.96
39.69
.25
.31
7.20
7.20
16.05
15.85
20.63
41.25
.34
.38
6.40
6.25
7.50
7.20
21.05
34.87
.26
.21
5.20
4.80
11.00
10.90
20.15
35.03
.25
.28
729 .29
6.80
6.70
11.25
11.25
25.26
40.14
.26
.28
6.15
6.50
12.10
12.10
22.66
32.25
.27
.37
6.80
6.45
10.85
10.65
22.43
39.96
.30
.27
6.45
6.60
9.60
9.50
25.21
36.59
.25
.24
727 “729
5.55
5.55
7.95
8.25
23.25
32.03
.23
.24
5.55
5.50
8.25
8.50
22.05
33.02
.24
.24
5.35
5.20
9.25
9.70
18.02
40.15
.27.
.23
4.15
4.50
7.05
7.40
17.22
23.73
.22
.20
6.00
5.75
8.20
8.45
24.11
34. 40
.24
.23
725 “722
TABLE XXVII.
SUMMARY 0? TABLES.
Time
Interval
A.M.-A.M.
c
O T.
•H -P
-p c
d d
rH
tH
ft,
(B bC
c c
d 3
Ei O
Eh >h
Absorption
Young Plants
9:15-9:15
Table XXI . la, lb
25.35
25.05
8:15-8:15 I
f 35°C. 75$R.H, ) 2a, 2b
21.05
20.95
8:55-8:55 '
(light constant)3a,3b
16.70
17.65
9:50-9:50
4a , 4b
Average
18.30
18.85
9:52-9:52
Table XXII. 2a, 2b
5.45
5.65
9:55-9:55 1
f 30°C. 75$ R.H.) la, lb
9.05
8.10
8:07-8:07 1
(light constant)3a,.3b
4.40
4. 55
9:02-9:02
4a, 4b
Average
5.70
5.60
8:50-8:50
Table XxiII. la, lb
f 25°C . 75 $ R.H.) 2a, 2b
5.90
5. 70
9:22-9:22 1
5.20
5.10
9:27-9:27 1
[light constant) 4a, 4b
5.25
5.25
9:05-9:05
1:27 P.M.-
l:27p.M.
3 a , 3b
Average
8.10
7.30
A.M.-A.M.
la, lb
6.55
6.70
9:33-9:33
Table XXIV. 2a, 2b
6.05
6.00
9:27-9:27 1
' 20° C. 75$ R.H.) 3a, 3b
5.25
5.30
9:20-9:20 1
[light constant) 4a, 4b
2.75
2.95
9:20-9:20
5a, 5b
6b
Average
3.70
3.90
9:03-9:03
la, lb
2. 55
2.50
12:30 P.M.-
12:30P.M. (
Table XXV. 2a, 2b
’ 15°C. 75$ R.H.)
3.35
3.30
8:00-8:00 I
[light constant) 3a, 3b
3.95
3.90
10:05-10:05
9:10-9:10
4a , 4b
Average
3.90
3.90
.3
tl
Cl
c
c
-H
-rl
c
•
•
o
O*
o*
•H
CO
CD
-P 0)
C 01
d -p
O -P
d
d
Ei
Ei
E, c
•H C
<u
01
01
01
— i d
-p d
E,
Ei
ft
ft
ft rH
ft rH
<
c
CD ft
c
E, ft
O
bC
Eh C
Eh
ro be
G G
CD
G
Time
d t)
to t3
d 3
d tJ
d 3
d r3
Interval
rH
01 o
01 rH
Ei O
f-i rH
Eh O
c o
Pi >1
O
Eh >h
Eh O
A.M.-A.M.
32.70
32.60
19.90
30.42
1.27
1.07
9:00-9:00
22.15
22.85
23.02
34.60
.91
.64
9:07-9:07
23.60
24.75
30.13
41.30
.55
.57
9:58-9:58
36.10
36.35
22.26
45.26
.84
.79
9:07-9:07
.89 .76
6.10
6.40
21.35
40.10
.25
.15
9:50-9:50
9.85
9.60
19.85
39.49
.41
.24
9: 55-9:50
7.05
7.35
23.77
42.81
.18
.16
9:27-9:27
5.30
5. 70
26.85
41. 72
.21
“726
.12
.16
9:22-9:22
7.45
7.40
23.54
38.30
.25
.19
9:22-9:22
8.55
8.80
24.46
44.87
.21
.19
9:30-9:30
3.00
3.60
23.44
35.92
.22
.083
9:01-9:01
5.90
6.00
24.08
32.05
.33
.15
9 : 56-9 : 5*6
725 .15
4.75
4.85
28.36
44.61
.23
.10
9:55-9:55
7.55
7.60
25.85
39.72
.23
.19
9:50-9:50
3.75
3.75
21.56
36.04
.24
.10
9:02-9:02
3.85
3.90
16.50
37.15
.16
.10
7:06-7:06
6.45
6.85
24.26
43.64
.15
.14
9:57-9:57
5.30
5.30
35.40
.15
10:02-10:02
.20
.13
5.10
5.05
16.56
39.15
.15
.13
11:50-11:50
5.20
4.90
18.32
35.21
.18
.14
12:12 p.M.-
12:12 P.M.
5.70
5.80
21.02
39.46
.18
.14
9:12-9:12
5.35
4.75
19.61
35.86
.19
.14
9:16-9:16
“Tl7 ‘
. 13*
Table XXVI. la, lb 4.80
(15 C .25$ R.H.) 2a, 2b 5.15
(light constant)
4.65
5.30
6.40 6.35 17.70 32.02
8.75 8.30 19.59 38.70
9:10-9:10
9:15-9:15
w a w* v/ y
I
f>l "t
phi. pH-
*
r.t*.
& M
/f-M
Ernest M. R, Lamkey
Vita
1890 January 1, Born at Riverton, Illinois
1905 - 1909 Student, Springfield High School, Graduated 1909
1909 - 1913 Student, University of Illinois
1913 - 1915 Assistant in Botany, University of Illinois
1915 - 1916 Eellow in Botany, University of Illinois
Degrees
1913 A.B.
Universi ty
of Illinois
1914 A«M,
University
of Illinois
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