TRANSPIRATION STUDIES. 21 
Tasie 4—Continued. 
: Dew-point. Temperature, Relative humidity. 
Date. Time. 
Plants, | Atom | aie: | Plant | AMMO Yee, | Planes | AEROM™ | Ate, 
bt Os KG. oC oF ey CA Lad OF p.ct p. ct p.ct 
Mar.13.) 5'17™ p.m. 2.0 2.0 2.0 72 72 72 27 27 27 
Mar.14.| 619 a.m.) —3.5 3.5 1.0 156 156 256 24 24 58 
6 55 a.m. 0.5 0.5 0.5 59 59 57 33 38 38 
800 am. 2.0 2.3 2.8 64 64 63 35 35 38 
8 25 a.m. 3.0 3.0 3.0 65 65 65 36 36 36 
929 a.m. 1.5 1.3 —0.5 72 73 71 25 24 23 
936 am. —0.5 —0.5 —0.5 73 73 73 21 21 21 
1055 a.m.) —0.5 —0.3 —0.5 84 85 84 15 15 15 
1100 am.| —0.5 —0.5 —0.5 84 84 84 15 15 15 
1225 pm.| —3.5 —3.0 1.3 86 86 86 W il 16 
12 33. p.m. 1.5 1.5 1.5 86 86 86 16 16 16 
155 pm. —3.5 —3.5 —0.1 88 89 89 10 10 18 
204 p.m. 0.0 0.0 0.0 89 89 89 13 13 13 
305 p.m.) —2.0 -1.7 1.0 89 90 90 i ll 14 
3.22 p.m. 1.0 1.0 T.0 90 90 90 4 14 14 
423 p.m.| —2.5 —2.0 2.0 84 84 84 12 12 18 
150 min. 248 min, 
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Fig. 8.—Graphs for transpiration of d, a branch in leaf from 
an adult tree. Exp. IV. 
