TRANSPIRATION STUDIES. 29 
EXPERIMENT X. 
Subject, plants No. 1 and 2; areas, not obtained. Atmometers, No. 496 
and brown cup No. 10. Situation, in the open, with exposure to sun and 
wind. On July 27 the leaflets were closed during the entire time of the 
TaBLE 10.—Transpiration of potted plants under different conditions of soil moisture. 
Experiment X. 
: Tr Tr T2 T2 +0 =| Temper- | Relative 
Time. T1 T2 | Ewe | Eto Eu En Eos Ew Buss ature. | humidity. 
July. 27.* en p. ct. 
Oh Sam asmiis || ssi. Caen’ aes. [i aytiem: Pam kee cae ane |e 4 || leone slag 82 57 
10 12 am. | 2.51] 1.26] 3.40] 4.10 | 0.738 | 0.612 | 0.370 | 0.307 1.20 86 47 
11 09 a.m. | 3.34] 2.48) 3.82] 4.62 4 . 723 649 537 121 89 44 
12 11 p.m. | 3.34] 2.48] 4.64] 5.12 719 652 534 484 1.10 91 43 
1 04 p.m.| 3.90) 2.68} 4.89) 5.21 797 748 548 514 1.06 92 45 
2 16 p.m. | 3.36] 2.24] 4.30] 4.65 781 . 722 521 481 1.08 92 45 
3.16 pm. | 3.22] 2.14] 4.11] 4.61 783 698 521 464 1.12 92 44 
Aug. 5.f 
24 a.m ae Rrra eCrine orem bee chert eran ocala 89 36 
9 30 am 09 OMEN saecdiases Morhssthact]: saree hadusndll opeacelerg] nike eeeatec'l| aaeeeeeee ee 93 31 
10 13 am. 07 .09 | 4.90 | 6.22] .0143 | .0112 | .0183 | .0144) .... 96 32 
1117 am. -05 .06 | 6.48 | 7.88] .0077) .0063 | .0093/ .0076, .... 98 30 
12 06 p.m 07 LOB) | crssesnte’ | tevagouse I iereszuneatee | tate apace || ois sadeen ll cis. seesaae cota 101 22 
1 18 p.m. 10 .04] 8.85} 10.75 | .0096 | .0078 | .0056 | .0041] .... 103 22 
2 08 p.m 08 BOB) csaiue. |) nape | eacatsyod. || te arietee | am stud ll aun aries 103 22 
3 09 p.m. 07 -04 | 9.50] 10.65} .0079} .0070 | .0063 |) .0056/ .... 106 21 
5 84 pm. | .... | oe. | 7.79] 9.16 | nee | cece bee e ee | vee eee samt one és 
* Soil moisture of No. 1=14.8 p. ct. t Soil moisture of No. 1=3.5 p ct. 
*Soil moisture of No. 2=15.1 p. ct. {Soil moisture of No. 2=3.4 p. ct. 
as 
7 Sree 
bo SESS E 
5 Pe ose 
ae —~=_ EE 
No. 10,° ak 
, , 
No. 4964#—- 
a : ge “ — T 
No. 1,” ij 
peawel pti July 27 
pe N io 4 
! meee AT 
i =e 
No. 2; 
ee 
10 11 12 1 2 3 1 4 12 1 2 
Fig. 15.—Graphsffor transpiration of two potted plants, Nos, 1 and 
2, under-different ‘conditions of soil moisture. Exp. X. 
