286 
Psyche 
TABLE No. 5. 
[December 
Extent of Winter Mortality in Experiments Examined in the 
Spring of 1923. 
Maine and New 
Eastern Massachusetts 
Cape Cod 
Hamp 
•shire 
Per cent of 
Number of 
Per cent of 
Number of 
Per cent of 
Number of 
winter 
stations 
winter 
stations 
winter 
stations 
mortality 
mortality 
mortality 
1 
0% 
2 
0% 
1 
3 to 4% 
3 
less than 1% 
7 
less than 1 % 
1 
4 to 5% 
2 
1 to 2% 
2 
1 to 2% 
3 
7 to 8% 
2 
2 to 3% 
'8 
2 to 3% 
1 
8 to 9% 
1 
3 to 4% 
3 
9% 
1 
4 to 5% 
2 
24% 
1 
5 to 6% 
3 
39% 
1 
6 to 7% 
1 
7 to 8% 
1 
Average mortality 9.3% 
Average mortality 2.6% 
Average mortality 1.3% 
Average mortality omit- 
ting the two highest 
5.4% 
Although the mortality was not nearly as extensive as it had 
been during the preceding winter, the same general conditions 
are noted; that is, a relatively higher rate of mortality at sta- 
tions in Maine and New Hampshire and an extremely low rate 
on Cape Cod. Only two stations showed an important mor- 
tality — Concord, N. H. (39 per cent) and Bristol, N. H. (24 per 
cent). Why these stations should have shown extensive winter 
mortality while other stations in the same region did not, is a 
point not clearly understood. They were in more exposed loca- 
tions, however, and may not have benefited by snow protection 
to so great an extent as the other stations. 
The following table exhibits the protecting influence of 
snow as found in an experiment overwintering in Wells, Maine 
and examined April 28, 1923. 
