AUTO-THERMAL INTEGRATION OF CLIMATIC COMPLEXES 1 93 
March 
40-65° F. 
65-70 
70-75 
80.4 X 4-5 X .8 : 
25.2 X 20. X .8 
18.4 X 45- X .8 ( 
Add one eighth of above 
for four days missing record 
in which the temperature did 
not rise above 75° F. 
289.44 
403.2 
662.4 
169.3 
75-80 
80-85 
85-90 
4.4 X 70. X .8 
1.5 X 78. X .8 
1.4 X 85. X .8 
246.4 
93-6 
96.2 
Total 
1.959-5 
April 
40-65° F. 
91.9 X 4' 
37.2 X 20. 
37-1 X 45- 
32.3 X 70. 
16.6 X 78. 
2.7 X 95- 
5 X .8 
X .8 
X .8 
X .8 
X .8 
X .8 
330.84 
595-2 
1,335-6 
1,808.8 
1,035.84 
167.6 
65-70 
70-75 
75-80 
80-85 
85-90 
Total 
5,273-88 
The time at my disposal does not allow me to cite illustrations of 
the manner in which the results of the integration of the temperature 
given in these tables are correlated with distinctive formative and re- 
productive reactions in some of the species under critical observation 
in our experimental grounds. Some of these are notable and striking. 
It need only be said in closing that not only may the exposures 
given above be evaluated in revised terms of growth of the wheat but 
they may also be converted into terms of growth or activity of any 
plant which has been the object of the necessary measurements. 
Fig. I. Graph showing relations of growth of wheat to temperature; compiled 
from data obtained by various authors and cited in Pfeffer's Plant Physiology, 
Eng. Ed.: 1903. 
Fig. 2. Diagram of thermograph record of the Coastal Laboratory, Carmel, 
California, June 16-23, 19^3, divided for measurement of areas to which growth 
values may be assigned. 
Explanation of Plates XVII and XVIII. 
