6 
NEIL E. STEVENS 
For comparison with data just given the amount of annual growth 
for the years ending in May and August at various elevations on 
Overlook Mountain (Ulster Co., New York) is given (Table II). 
While the writer has no accurate data as to the temperature at these 
various elevations it is interesting and significant that in general 
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Fig. 2. Graphs showing the growth of Endothia parasitica on Castanea dentata 
and climatic data for the year ending August, 191 5. 
the amount of growth decreases with increased altitude. The only 
exceptions to this rule are in the case of Station O 4 which, being on 
the south side of the main ridge of Overlook, showed more growth 
