22 
NEIL E. STEVENS 
Table VIII {Continued) 
Local 
ty ' 
No Peri- 
Perithecia with Mature 
Observed 
.Stations on 
^Overlook 
Mountain 
tion in 
Feet 
Inoculations Made 
thecia Up 
to and 
Including 
c 
6 
1,500 
1,500 
On or about 
May 25, June 
12, July 10, 
Aug. 12, and 
Oct. I, 1914. 
Do. 
May 23, 
1915- 
Oct. I, 
Aug. II, 1915. Pre- 
sent in cankers 
from all inocula- 
tions. 
May 26, 1915. Pre- 
sent in cankers 
from- inoculations 
of May and June 
1915. Aug. II, 
1915, abundant in 
all. 
Perithecia less nu- 
merous than at 
the lower sta- 
tions. 
1915- 
0 I 
1,900 
2,500 
2,800 
Do. 
May 26, 
1915- 
Aug. 12, 
1915- ' 
May 26. 
Nearly 
mature. 
Aug. 13, 1914. A- 
bundant. 
0 2 
Do. 
O4 
On or about 
Aug. 13. Mature 
perithecia from 
one inoculation of 
May 14. 
May 25, June 
12, July 10, 
Aug. 12, and 
Oct. I, 1914. 
and May 25, 
1915. 
O3 
2,900 
On or about 
Aug. 13, 
1915- 
May 25, June 
12, July 10, 
Aug. 12, and 
Oct. I, 1914. 
far north as Wilmington failed to show any perithecia. Perithecia 
did, however, develop during the late winter and spring as far north 
as Hartford, Conn., and up to an altitude of 1,500 feet on Overlook 
Mountain. Perithecia developed also at both northern and southern 
stations during the summer of 191 5 although they were somewhat 
less abundant at Wilmington than at other stations and were found 
at only one of the three highest stations on Overlook Mountain and 
here only rarely. 
Temperature 
On comparing these data (see Table VIII) with the Weather 
Bureau records it is evident that perithecia may be produced under 
quite different temperature conditions. In our investigations they 
were produced between December 25 and April 22 at Washington, 
