216 On the Climate, §c. of the South Shore of Lake Erie. 
blowing up the valleys of the Mississippi and Ohio, in conjunc- 
tion with other causes, bring forth vegetation earlier; but cold 
weather and disastrous frosts too often follow. 
float upon the lake, even as low down as Buffalo. No sooner do 
they disappear than spring sets in with a reality, and vegetation 
puts forth with swb-arctic rapidity. 
The lake rapidly imbibing heat at this season, becomes a 
safeguard against any subsequent vernal frost. Its influence was 
manifested in a satisfactory manner, early in the present season. 
On the Ist of May, spring seemed to be fully established ; fruit 
during the day and evening. At 2 o’clock, p. m., it was 48° 
Fahrenheit ; at 7, 34°; and at 9, 32°. The atmosphere was 
to 40°; a heavy cloud of haze hung about twenty degrees above 
i he 
the day and night, down to about 26°. The day following was 
cold and blighting, and fruits were generally destroyed. 
ie modes by which the lake exerts its influence on such 
> somme do not appear to be uniformly the same at different 
mes, : 
_ On the approach of a cold night, as in the instance above n0- 
ticed, the warm emanations condensing may give off caloric, and 
obscure the atmosphere with haze, mist, or clouds, when no frost 
will occur. 
Under circumstances apparently similar. on the approach of a 
cold night, neither haze ai Gor clouds ma Soria tit a stiff 
breeze springs up, and the stars become unusually brilliant. The 
thermometer vacillates between 32° and 38°, rising with the 
gusts of wind, and falling during the intervals of calm. Then 
no frost will appear. 
Again, none of those modifying causes may intervene, but the 
temperature may fall below freezing point, ice form on the sut- 
face of water, and the expanded fruit, leaves and blossoms con- 
geal. Under such circumstances, the first rays of the rising sup, 
the next morning, will be arrested by a haze, which will soon 
thicken, and before noon a warm rain will probably fall. The 
