116 
NEIL E. STEVENS 
Relation of Temperature to the Growth of Endothia parasitica 
As in my earlier paper, the temperatures as given by the U. S. 
Weather Bureau reports for the various localities under consideration 
were computed according to the methods of summing remainder 
indices and summing exponential indices. The results are given in 
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Fig. I. lateral growth of cankers of Endothia parasitica and temperature 
computed in various ways for the year ending in May, 1916. All data expressed in 
percentage of that at Concord. 
Table IV, and Figure i. The graph expresses the rate of growth of 
the fungus and the temperatures at the various localities in percentage 
of that at Concord, growth and temperature at Concord being con- 
sidered 100 percent. The results of computing temperature by these 
two methods are closely comparable, the curves being nearly parallel 
