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Branches. The Ohio receives immediately about 

 400 streams, of which 20 are rivers above 100 miles 

 long, 54 are small rivers or large creeks, and more 

 than 300 are brooks and runs. Its largest branches 

 empty into the lower parts of the River, such as the 

 Tennessee, Cumberland, and Wabash. They all 

 flow in valleys similar to that of the Ohio and pro- 

 portioned to their size. Many of them, such as the 

 Scioto, Miami, Tennessee, Wabash, &c. have plains, 

 which indicate former lakes. Most of them have 

 rapids, ripples, bars, islands, &c. and offer the same 

 phenomena as the Ohio, particularly the periodical 

 rises and falls. I shall give some account of the 20 

 principal streams, which fall into the Ohio, in the 

 order in which they join it. 



PRINCIPAL BRANCHES OF THE OHIO. 



1. Alleghany. It rises in Lycoming county, 

 Pennsylvania, near the 42d degree of latitude, on the 

 northern parts of the Alleghany mountains, and, after 

 flowing through a small part of the state of New- 

 York, it returns into Pennsylvania, until it joins the 

 Monongahela at Pittsburgh and forms the Ohio. Gen- 

 eral direction S. W. Length in a direct course 170 

 geographic miles, in the natural course 250, equal to 

 285 English miles. It has five great branches, the 

 Conemaugh, Conewa- [I. 364] [/d] go, Tobas, &c. It 

 is navigable throughout, and its stream is gentle and 

 clear. 



2 . Monongahela. Rises in the Alleghany moun- 

 tains of Virginia, near latitude 38. Direct course 

 N. and 150 miles, in the natural course 210 miles, or 

 245 English miles. It has three great branches, of 

 which the Yohogheny is the principal. Its breadth 



