62 College of Forestry 
Wiseonsin, Schneider for Michigan and Wilson* for New 
York. The basis for the influence of bodies of water upon 
loeal climate is set forth in the following from Von Engeln, 
p. 347. “ Where bodies of water of considerable area exist 
they exert an important equalizing effect upon the tempera- 
ture. Water absorbs more heat, holds more heat, is warmed 
to greater depth, absorbs and radiates heat more slowly than 
land. Further, 50% of the insolation on water areas is used 
“Torben 
: | 
jScnurecel 
of fall. Reproduced by permission of N. Y. State College of Agriculture, 
Cornell University, from Experiment Station Bulletin 316, Frosts in New York 
in evaporating water. This develops a moist blanket of air 
above and adjacent to the water surfaces that is less subject 
to marked temperature fluctuations than dry air. The total 
effect of these differences is to make summers cooler, winters 
warmer, to prolong the fall season and retard spring and 
also to check sudden temperature changes in short time 
periods. This last is especially important in the northern 
1 Wilson, W. M.: Frosts in New York, Cornell Univ. Agric. Expt. 
Sta. of the College of Agriculture. Bull. 316, 1912. 
