IRANSACnON'S OF SOCIETY. 201 



every year for building purposes, llie beach would 

 be completely cleared oi them every season but on 

 returning for the same purpose the next year the sup- 

 ply was as a.bundajit as the prc:\ious year. 



The agencies concerned in the production of this 

 phenomenon are three, viz: wind, water, and ice. In 

 the Spring when the ice in the lake breaks up there is 

 usually a prevailing north wind which drives the ice 

 southward, when it arrives at the beach, being about 

 three or four feet thick, pushes before it large quan- 

 tities of the pebbles in question. Masses of ice which 

 have been detached from northern shores often trans- 

 port sand, pebbles and small stones many miles. 

 In the lake near Magoon's Point in Canada are sev- 

 eral small islands, the rock formation of which is 

 n-jvaculitc slate, small angular boulders of this forma- 

 tion have been transported by the ice to the southerrt 

 shores, a distance of about ten miles. This shows the 

 agenc)- of ice. 



The wind produces currants in the lake even at a 

 great depth, wliich probably has the most influence in 

 producing these accumulations. On looking into the 

 water at a depth of ten feet or more, small sticks and 

 grasses may be seen floating with considerable veloc- 

 ity, which shows that powerful currants in still water 

 arc in constant operation at great depths. These 

 currants would be much accelerated during long con- 

 tinued winds, when pebbles and sand would be swept 

 along before them. 



July ii, 1870. 



Excursion to Farranfs Grove, on the 



Western Shore of Lake Memphremagog. 



Dr. HiNMAN presiding. 



Lunch. — Cicad<2. — After a jolly lunch in the grove 



-it one o' clock Dr. Currier orcbcnted ei^cl^.tcen socci- 



