96 Nebraska Agricultural Exp. Station, Research Bui. 6. 
Table 27. — Relationship between the daily transpiration, evapo- 
ration, and climatic factors. 1 1910. 
Water 
Average 
evap. 
Mean 
hourly wind 
Water 
from free 
hourly 
Mean 
velocity 10 
24 hours 
transpired 
water 
tempera- 
relative 
ft. above 
Per cent 
ending 
per plant. 
surface. 
ture. 
humidity. 
ground. 
of possible 
7 p. m. 
(Av. 12 
(Av. 6 
(7 a. m.- 
(7 a. m.- 
(7 a. m.- 
sunshine 
plants) 
jars) 
7 p. m.) 
7 p. m.) 
7 p. m.) 

Grams 
Grams 
Degrees F. 
Per cent 
Miles 
Per cent 
(1) 
(2) 
(3) 
(4) 
(5) 
(6) 
(7) 
July 20 
" 21 
951 
200 
79.2 
52.4 
4.7 
46 
2,522 
327 
88.0 
44.1 
8.0 
90 
" 22 
2,350 
278 
84.4 
53.6 
6.7 
75 
" 23 
1,933 
215 
80.3 
56.5 
5.8 
89 
" 24 
3,211 
3,307 
311 
90.9 
24.7 
4.4 
100 
" 25 
379 
92.6 
44.6 
8.3 
73 
" 26 
2,955 
382 
89.9 
53.7 
8.2 
98 
" 27 
4,550 
454 
97.2 
26.7 
9.0 
95 
" 28 
2,333 
372 
84.4 
58.8 
11.1 
62 
" 29 
1,579 
173 
81.7 
54.5 
4.7 
34 
" 30 
2,802 
232 
83.8 
34.2 
4.5 
98 
" 31 
3,561 
314 
85.7 
38.2 
6.0 
99 
Aug. 1 
" 2 
3,982 
374 
90.3 
46.4 
6.8 
91 
3,419 
311 
88.2 
53.1 
4.6 
85 
" 3 
2,143 
204 
82.6 
45.7 
6.7 
88 
" 4 
2,479 
236 
77.2 
45.7 
5.6 
84 
" 5 
1,867 
163 
76.7 
43.3 
4.7 
48 
" 6 
1,582 
147 
74.2 
43.0 
4.4 
30 
7 
2,533 
193 
79.0 
42.1 
3.7 
84 
8 
857 
91 
71.1 
73.2 
5.5 
24 
9 
2,438 
319 
76.1 
40.6 
9.0 
100 
" 10 
2,815 
256 
80.4 
41.3 
6.5 
89 
" 11 
2,571 
259 
81.5 
57.2 
6.9 
93 
" 12 
2,518 
241 
83.0 
58.6 
8.1 
65 
" 13 
708 
105 
75.1 
77.3 
5.7 
13 
" 14 
1,098 
139 
78.6 
68.3 
6.0 
45 
" 15 
2,094 
163 
82.4 
61.3 
4.8 
65 
" 16 
2,850 
219 
88.3 
56.2 
4.7 
72 
" 18-19 
1,104 
108 
75.2 
68.7 
5.0 
61 
" 20 
2,165 
198 
82.0 
63.1 
3.7 
99 
1 From Kiesselbach and Montgomery (1911). 
reduced than the evaporation. This is contrary to a common 
belief that the plant exercises control over the water exit in rela- 
tion to the climatic conditions. 
Occasional days occur when all climatic conditions combine 
in extreme degree to make the atmospheric demand for moisture 
excessive. Examples of such days of maximum climatic com- 
bination and water loss were July 27 and August 1, 1910, and 
