﻿62 THOUSAND LAKES. 



Thousand Isles will be studded with the summer 

 retreats of the wealthy citizens of the adjacent 

 states, and the incongruities of taste will mar the 

 fair face of nature. 



On the summit of the canoe-route between 

 Lakes Superior and Winipeg, a sheet of water, 

 bearing the analogous appellation of Thousand 

 Lakes, is also studded with knolls of granite, 

 forming islets ; but low mural precipices are more 

 common there ; and there is, moreover, an inter- 

 ,' mixture of accumulations of sand, such as are com- 

 monly found on the summit of the water-shed, 

 along its whole range. The general scenery of 

 this lake is similar to that of the Thousand Islands ; 

 but though the elevation above the sea does not 

 exceed fourteen hundred feet, the voyagers say 

 that frosts occur on its shores almost every morn- 

 ing throughout the summer. 



Silurian strata occur on both flanks of both 

 arms of tlie water-shed above spoken of, to a 

 greater or smaller extent throughout their whole 

 length,* When we descend to Lake Winipeg 

 we come upon epidotic slates, conglomerates, 



* A Pentamerus, veiy like P. Knightii, was gathered by 

 Dr. Bigsby on the Lake of the Woods, and presented by him 

 to the British Museum. He probably found it in some of the 

 western arms of the lake, the islands in the more easterly part 

 being mostly granite. 



