Warm and Cold Winds. 81 
B.—IN MICHIGAN. 
Aver- | Lati- | Eleva-| Period of 
STATIONS. Dee. | Jan. | Feb. | Mar. 3 i 
age. tude. tion. | observation. 
; e alee 1836-1846 
Detroit ...... 26.9 | 27. | 26.6 | 35.4) 28.97/| 42.2 ° | 580 ft. 1819-1651 
Fort Gratiot.| 26.6 | 25.3 | 25.3 | 33.2 /27.6 |42.55° | 598 « | f 1830-1846 
1849-1852 
Battle Creek.| 27. | 24.1 | 22.6 | 33.7 | 26.85 | 42.2 ° | 800 ‘| 1849-1855 
Ann Arbor...| 25.3 | 23.6 | 21. | 32.7 | 25.66 | 42.15° | 700 ‘* | 1854-1855 
It will be seen that the warmest stations are 
in most intimate connection with large bodies of 
water: Fredonia is on Lake Erie, Rochester near 
Lake Ontario, Auburn near the central New York 
lake region and possibly within the influence of Lake 
Ontario, while Utica is farther inland. Similar ob- 
servations might be made concerning the Michigan 
stations. Temperatures of the coldest days would 
show much greater differences. 
It should be observed that the influence of a body 
of water is not governed by its proximity, but by 
elevation of the land and direction of winds. Grand 
Rapids, Michigan, although about twenty-five miles 
from Lake Michigan, is greatly influenced by it. 
It is evident that if a wind-break stops or deflects 
a warm wind, it may prove injurious. A still place 
in the lee of the wind-break may, therefore, be the 
coldest part of the plantation. So far as the writer 
is able to learn, this sort of injury from wind-breaks 
is confined to those regions which are directly influ- 
enced by bodies of water. The eastern shore of Lake 
Michigan has furnished many examples. Most growers 
G 
