SOURCE OF ST. PETER S RIVER, 249 



of mean tide is the same at the respective estuaries of the 

 Mississippi, Hudson, and St. Lawrence rivers. 



Agreeably to the authority above cited, the source of 

 the Mississippi has an elevation of thirteen hundred and 

 thirty feet, which may not greatly exceed the truth, yet 

 we are inclined to think that twelve hundred would be a 

 nearer approximation. 



In order to simplify our ideas upon this subject, and ex- 

 hibit them in a manner less prolix, we shall embody the 

 several statements, made in this and the preceding articles 

 of this paper, in a tabular form, with the view of intro- 

 ducing at the same time, the probable altitudes of other 

 points relative to which no remarks have herein been 

 made. 



A table showing the probable altitudes, in feet, of the 

 water level, at a variety of points therein specified, 

 above tide-water. 



Points Indicated. Elevation. 

 Mouth of the Ohio river - - - - 300 

 Ohio river, at Cincinnati* - - - , 414 

 Do. at the mouth of Scioto river* - 464 

 Do. at the mouth of Muskingum river* 541 

 Surface of Lake Erie,* River des Plaines, 20 miles 

 above its mouth ; Mississippi, at the head of the 

 rapids De Moyen ; and the Ohio a few miles be- 

 low Wheeling, Virginia - - - 565 

 Lakes Huron and Michigan - . . 571 

 Lake Superior - - - . _ 595 

 The Ohio at Pittsburg ; the Mississippi at the mouth 

 of the St. Peter ; and the Missouri at the mouth of 

 the River Platte - - , . gso 

 Sources of the St. Peter and Red rivers - 830 



