INFLUENCE OF CERTAIN CLIMATIC FACTORS 
5 
girdled before the year was complete. At Charlottesville a forest fire 
destroyed the inoculated trees some time during the last week in 
April, 1915. 
1. 
/40 
/JO 
i 
I 
I 
8s II 
I 
I 
i 
k 
?^ • 
II 
I 
as? 
II 
/ 
1 
i 
\ 
V 
— y — 
/ 
/ 
V 
\ 
\ 
\ 
/ 
/ 
\ 
\ 
\ 
•> 
/ 
/ 
/ 
K 
\ 
\ 
V 
\ 
\ 
/ 
/ 
\ 
\ 
\ 

^^^.>; 
\\ 
k 
/ 
/ . 
\ 
\ 
, W 
— 
/\ 
/ \ 
/ 
/ 
\ 
— V 
•x H 
*\. 
i 
■■ ro7> 
*\ 
1 
— T£/^p^/?/^rc 
\ 
yRE E, 
JPE SL 
'^P/C-ZE/ 
>MMPiT 
OA/ 
— LEA/Gr/^ Or^r/?OSr^ESS SEASO/V 
III! 
1 1 1 1 
Ol^E/? X 
0/ /NC-/- 
■f 
/20 
//O 
/OO 
90 
80 
60 
40 
Fig. I. Graphs showing the growth of Endothia parasitica on Castanea dentata 
and climatic data for the year ending April and May, 1915. 
The relation of the amount of growth at the various stations is 
best seen from the curves (Figs, i and 2), where the amount of growth 
is expressed in percentage of that of Charlottesville. The amount at 
Charlottesville has been used as standard for comparison of all data 
in making curves, since this is the most southerly point and is near the 
center of the chestnut belt. This will also make comparisons easy 
in case points further south are studied as the chestnut blight advances. 
