4 
NEIL E. STEVENS 
writer to represent about the degree of accuracy with which a number 
of cankers can be measured. These measurements are not exceptional 
in any way and in all probability represent about the average growth 
at those points during the year. In general, the growth for the year 
ending in May is about the same as that for the year ending in August. 
This is not true of inoculations made at all seasons however. 
Experiments during two seasons (1912-13 and 1913-14) indicate 
that inoculations of Endothia parasitica on Castanea made in the fall 
do not develop until the following spring. Those made in Maryland 
during November, 1912, showed no evidence of development until 
early in the following May. A similar series made early in November, 
1913, showed no growth until spring and cankers from inoculations 
made in April, 1914, developed throughout the summer as rapidly as 
those made the fall before. These results agree with those of Anderson 
{i, p. 8) and Rankin (9, p. 244). 
Table I 
Lateral Growth of Cankers of Endothia parasitica in Various Localities 
Locality 
Elevation 
Year 
Cm. 
Year 
(in Feet) 
Ending 
Ending 
Cm. 
I915 
I915 
Concord, N. H 
May 18 
14 
Aug. 19 
14 
711 (900) 
22 
15 
16 
15 
222 
17 
16 
17 
15 
(2 stations). 
(350) 
15 
16 
18 
16 
Woodstock, N. Y 
1,000 
24 
15 
II 
16 
86 
14 
19 
10 
20 
Van Bibber, Md 
100 
20 
Oct. 7 
18 
Woodstock, Md 
392 
Apr. 27 
20 
Aug. 9 
20 
Frederick, Md 
275 (325) 
27 
23 
9 
(Sprout gird- 
led. No rec- 
ords.) 
112 (300) 
22 
20 
July 28 
21 
Fairfax, Va 
300 
June 6 
23 
4 
21 
854 
Apr. 20 
25 
(Forest fire; no later 
records.) 
As is shown by the table, there is a more or less regular increase in 
the annual growth from Concord, N. H., to Charlottesville, Va. So 
great is this difference that it must obviously be due to the difference 
in climate and not to a variation in the trees. The record is unfor- 
tunately not complete at Frederick, Md., or Charlottesville, Va. At 
Frederick the trees inoculated in August proved too small and were 
