HEIGHT OF LAKE WINIPEG. 105 



to Thousand Lakes* (Milles Lacs), forty portages are 

 made, in which the whole or part of the cargo is carried, 



* The height of this lake above Lake Superior was ascertained 

 approximately as follows : — 



Foot of Mountain Portage estimated by Captain Lefroy - 48 



Upper end of ditto (bar. meas. Rich.) ... 127 



Ascent of river to Dog Portage (estimated, Rich.) - - 150 



Upper end of Dog Portage above the lower (bar. meas. Rich.) 332 



Ascent of Dog River to Thousand Lakes (estimate) - 160 



817 

 Lake Superior above the sea - - - - 641 



Thousand Lakes above the sea - 1458 



Owing to the obstructions in the upper part "of the Dog River, the 

 canoe route diverges from that stream at Cold-water Lake, and 

 passes by the Prairie, Middle, and Savannah Portages, and a small 

 stream which flows from the latter into Thousand Lakes. The heights 

 of this part of the route are as follows : — 



Feet- 



Dog Lake, above Lake Superior ... 557 



Ascent of Dog River - - - - 14 



Portage to Cold-water Lake - - - - 2 



West end of Prairie Portage and Middle Portage - - 161 



834 

 Lake Superior above the sea - - - - 641 



Height of Prairie or of Middle Portage above the sea - 1475 



The difference of height between the ends of the Mountain Portage 

 was carefully ascertained by me with Delcro's barometer in 1849. 

 Major Delafield estimates the difference at 125 feet, and Lieutenants 

 Scott and Denny, who accompanied Major Long in his voyage up 

 the St. Peter's, at 130 feet. Mr. Murray, of the Canadian Geological 

 Survey, measured the actual height of the falls here (named Kak- 

 habikkd) from the smooth water at their summit to the base, and 

 found it to be 119 feet ; but at least 8 feet must be added to give the 

 difference between the ends of the portage, which terminates some 

 way above the brow of the cascade. Captain Lefroy makes the height, 

 by barometrical measurement, only 115 feet. 



In 1849 the height of the upper end of Dog Portage was ascertained 

 by me with Delcro's barometer ; in the previous season the aneroid 



o 2 



