and ks omnacte. ith eteoro ihe on 
or ‘and a ps riations ie pet 
causes, and variatic sa ; by Wu, W Mam 
Professor at i. % 19 ‘Se “ence in Ohio Oto hives Fy 
summer and sapere 
1 operation besides un lobed reine bf ome — 
meteorological ae vation ) he samé- eit oie Sine 
may not be nhacee able to the scientific pa. 
During Jongg part + aliddte thonth of July, the weather i is 
generally serene, with a clear sky, and little rain except oc 
sional thunder-showers.* ‘The lake is’calm, and this is the rer , 
favorable season of the- year for coasting in boats and canoes, *: 
The prevalent winds-durng the summer are from the west i 
ands.w. Many parts of the lake aoe in this calm season of 
the year, are subject to sudden: lis. The Indians and voy- 
_ ageurs are very cautious ; Hysh Mi eae pears tees Ag 
the coast and the local lan ‘ther 
is seen to indicate their approach. ‘of the voyageurs hing - 
that while coasting along with the msn calm;or only a gentle i 
breeze, the boat, just-before one of these blasts, seems to be sud- 
denly lifted as if struck by some unseen force ; and in such cases 
they at once make a | 
