TRANSPIRATION STUDIES. 27 
but lost its leaves immediately and gained a new set after two weeks. The 
areas were as follows: No. 1, 68.31 sq. cm.; No. 2, 75.70 sq. cm.; No. 3, 
101.67 sq. cm.; No. 4, 13.11 sq.cm. No.1 had acquired a new set of leaves 
since April 25, when they were taken off for measurement. 
Tabie 9.—Transpiration of four potted plants. Experiment IX. Date, June 30, 1911. 
‘ | TM T2 Ts T% Rel. 
Gees nr Te | Ts Ts Fro Ey Bw Ew Exo Temp. hum 
| °F. | p. ct. 
h 
§ 2s am} 0.00026 | 0.00125 | 0.00045 | 0.0001 | 0.0100 | 0.026 | 0.125 | 0.045 oof 2 | 33 
8 17 a.m. | .00758 0074 00728 00495 | .0363 | .209) .204] .200] .136 78 37 
10 12 am.| .0174 0159 -0130 00229 | .0477| .367| .333) .273 | .048 85 32 
11 21 am.| .0193 0168 0180 00526 | .0502 | .884| .334) .258| .105 89 31 
12 18 p.m. |} .0225 0198 0138 00961 | .0570 | .395 | .347) .242] .168 92 29 
1 38 p.m. | .0212 0196 0152 00850 | .0640 | .831 | .306) .237] .182 97 28 
L001 rod; 
Fia. 18.—Graphs for actual transpiration of four potted 
plants. Exp. 1X. 
