TABLES OF ELEVATION, etc. 
411 
TABLES OP ELEVATION, etc. 
The following tables present the elevations, areas, etc. of the great lakes, and the elevations 
of the principal lakes in the district. 
Table of elevation, mean depth, length, breadth and area of the several collections of water 
in the Great St. Lawrence Basin * 
Elevation 
above tide 
level. 
Mean depth. 
Mean length. 
Mean 
breadth. 
Area. 
Lake Superior,_ 
Lake Huron,_ _ 
Lake Michigan,_ 
Lake Erie,_ 
Lake Ontario,_ 
River St. Lawrence and smaller 
lakes,___ 
Feet. 
641 
596 
600 
565 
231 
Feet. 
900 
900 
900 
120 
492 
20 
Miles. 
300 
200 
300 
230 
180 
Miles. 
80 
95 
50 
35 
30 
Square miles. 
24,000 
19,000 
15,000 
8,030 
5,400 
1,500 
72,930 
Total water surface,_ 
* From Prof. J. Henry’s Topographical Sketch of the State of New-York, Transactions of the Albany Institute, Vol. 1. 
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