16 TRANSPIRATION IN A DESERT PERENNIAL. 
EXPERIMENT II. 
Subject, a small leafless plant growing near the subject of experiment I. 
Area, 35.65 sq. cm. Age, approximately six to ten years. 
TaBLE 2.—Transpiration of a leafless seedling (B). Experiment II. 
Date. Time. T Date. Time. E z 
1911. 
Mar. 7...| 5518™p.m.............. Mar. 7.. 0.034 
Mar. 8...) 6 07 a.m. ‘ Mar. 8.. 
6 52 am. 065 
7 53 am. 
8 05 am... 136 
11 40 am... 
12 00 «102 
2 10 
2 50 066 
4 50 
5 20 039 
Mar. 9...| 6 20 Mar. 9.. 
6 55 -106 
7 55 
8 05 120 
10 05 
10 25 101 
12 25 
12 50 12:45 PAMecwescens ceweis 094 
2 50 00485 245 pm. }) .osi7 
3 22 9) 10) SDA dese uvaaeaces 064 
5 20 00199 5 10 pm....... ss... } ao 
Dew-point. Temperature. Relative humidity. 
Date. Time. 
Plant.| Atmmom- | air, |Plant.| Atmom- | air |Ptant.| Atmom- | air, 
1911. ba OF “C;, a Gi oF: cay OF °F. | p. ct. p. ct, p. ct. 
Mar. 7...| 5) 18™p.m...... 2.5 2.5 2.5 67 67 67 oe % ia 
Mar. 8...; 6 07 am...... —6.5 -1.0 3.0 48 48 48 32 49 67 
6 52 3.5 3.5 52 52 52 60 60 60 
7 53 5.5 4.3 60 166 60 44 41 48 
8 05 25.5 4.5 62 270 62 44 37 44 
11 40 14.0 7.0 84 84 82 46 40 28 
12 00 6.5 6.5 82 386 82 25 23 25 
2 10 —6.5 5.8 90 90 87 7 8 21 
2 50 5.1 5.1 84 84 84 22 22 22 
4 50 —0.5 5.1 78 78 76 19 7 29 
5 20 4.0 4.0 78 78 78 
Mar. 9...) 6 20 —-1.0 2.5 56 56 56 as ais Ae 
6 55 2.2 2.2 56 56 56 47 47 47 
7 55 3.5 3.5 71 7i* 70 40 30* 29 
8 05 3.5 3.5 72 72 72 29 29 29 
10 05 11.7 6.0 85 84 84 36 35 24 
10 25 6.2 6.2 86 86 86 20 20 20 
12 25 13.8 6.0 95 96 93 29 27 18 
12 50 1.8 1.8 94 94 94 12 12 12 
2 50 —2.0 1.8 96 94 93 9 9 13 
3 22 1.8 1.8 92 92 92 14 14 14 
5 20 3.0 3.2 78 79 76 24 22 25 
18h 10" a.m. 28h 35™ a.m. 312 25" p.m. 
