114 Nebraska Agricultural Exp. Station, Research Bui. 6. 
roo% 
80% 
60% 
20% 
y// 
I—I 
( 
1 
1 
1 
/A 
1 
1 
1 
1 
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# 
P 
-1 
\ 
\ 
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1 
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V/, 
k 
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'7/ 
Srcr/c// /ve vvv/trr \sic/a//¥c water 
/oer <?ra/?7 dry \ /)er s# //7c/? 
Trow oie s? //re A 
free water surface 
Chart XVIII. — Relative transpiration from corn plants and evaporation from 
free water surface in two greenhouses of high and low atmospheric humid- 
ity. Two-year average, 1911 and 1912. (Graph of Table 39.) 
Table 40. — Effect of previous condition of growth on transpiration. 
1912. Pop corn used. Grown in Jf-gallon potometers. 
Average 
leaf- 
area 
Tran- 
spiration 
week 
ending 
July 16 
Tran- 
spiration 
week 
ending 
July 23 
Transpin 
1 sq. in. 
First 
week 
ttion from 
leaf-area 
Second 
week 
Plants grown continuously 
in dry greenhouse. Aver- 
age of 10 plants 
Plants transferred from hu- 
mid to dry greenhouse. 
Average of 8 plants 
Sq. in. 
543.0 
547.0 
Grams 
4,561 
4,671 
Grams 
4,904 
4,494 
Grams 
8.40 
8.54 
Grams 
9.03 
8.21 
Plants grown continuously in 
humid greenhouse. Aver- 
age of 10 plants 
Plants transferred from dry 
to humid greenhouse. Aver- 
age of 8 plants 
528.0 
508.0 
3,191 
3,043 
2,813 
2,668 
6.04 
5.99 
5.33 
5.25 
