Lioyp: LEAF WATER IN GossYPIUM 23 
TABLE IV 
Leaf ater relative ve pee area SOM Dates from. 7 observed weights in 
TABLE III, g y Nn TABLE V is assumed. 
Ratios of water (= C) to Observed ratios water to Water to | Leaf water per 
Hour dry weight dry weight dry weight, sq. cm. 
area=C 
6.20 326 b dale) 326 I0o 100 1.60 
10.00 | 285 | 87.5 250 | 79.5 92 1.47 
2330 1 age ee 238 73.0 95 1.52 
TABLE V 
Gossypium herbaceum. Tucson, Ariz., 26, 1911. Weight of water and 
weight in grams per 100 sq. cm. of at at the eae indicated. Two series 
Wintad Aug. 25. 
| 6.20 | 10.20 14.15 
Series | 
Dry wt. | Water | Dry wt Water Dry wt | Water 
2 0.46 1.96 0.55 | 1.83 0.63 1.94 
3 0.50 1.906 | 0.56 | 1.79 0.62 1.96 
Ave 0.48 06 = 0.55 1.81 0.62 1.95 
TABLE VI 
Gossypium herbaceum. Auburn, Ala., Oct. 1, 1911. Weight of water and dry 
weight per 100 square centimeters of leaf at the hours indicated. ies 4, young 
newly developed leaves near the top of the plant; series 5, mixed, old leaves from 
various parts of the plant; series 6, old leaves near the top of the plant. 
6 10 14.30 | 18 
No. : 
° Hove | Water Dry wt Water Dry wt Water | Dry wt. | Water 
4 0.534 1.74 0.71 1.50 0.58 I.40 0.64 1.50 
5 0.50 1.66 0.54 1.36 0.54 1.24 0.56 1.38 
6 0.524 1.60 0.66 1.48 0.68 1.58 0.64 1.69 
0.515 1.66 0.64 1.45 0.60 I.4I 0,60 1.52 
TABLE VII 
Gossypium herbaceum. Auburn, Ala., Oct. 8, 1911. Weight of water and dry 
weight per 100 sq. cm. of leaf at the ge: Sadicatna Series 7, material from alternate 
sides of the same leaves on ten plants; series é. young ares taken indiscriminately 
from plants in “‘lot 2, closely planted in rows.’ ea series from fresh 
secondary growth at the tops of plants; series 9, old leaves taken indiscriminately: 
marked “old.” 
6 II.00 / 14.30 
No. j 
: Dry wt Water Dry wt Water | Dry wt Water 
7 0.5) 1.56 0.58 1.45 0.58 I.44 
8 0.46 1.62 0.50 1.41 0.54 I.41 
j 9 0.54 1.4 0.53 1.28 0.68 1.57 
VO... 0.50 1.54 0.54 1.38 0.60 1.47 
