9 



DiRKCTioN^ Although the Ohio is exceedingly crooked ii^ 

 its course, its general direction is south west and west south 

 west: it assumes every other directionj but very seldom the 

 opposite one, N. E. 



Mouth. It empties into the Mississippi, near the 37th de^ 

 gree of latitude, dividing the state of Kentucky from that of Il- 

 linois, which lies north. 



Connections. The Ohio is one of the principal branches of 

 the Mississippi, and properly its great eastern branch. The 

 two great western branches, the Arkansas, which is about 1800 

 English miles long, and the Red River, which measures about 

 1600 miles, exceed it in length, but not in size,nor in the number 

 of tributary streams; nor in the extent of their basins. The 

 northern branch or upper Mississippi is much inferior to it in 

 all respects (it is only 775 miles long, and receives only seven 

 large rivers,) although it has been mistaken for the main branch. 

 The real main branch is the Missouri, which takes the name of 

 Mississippi after its junction with the upperMississippi. It flows 

 2700 English miles above that junction, receiving thirty- three 

 rivers above loo miles long, and 1300 miles below, receiving 

 twelve such rivers, having a total course of 4000 miles and forty 

 five large branches. It is yet undecided whether the Yellow 

 Stone or the Western Missouri is the principal upper branch. 



Length. From Pittsburgh to the mouth, it is 500 geograph- 

 ic miles in a direct course (60 to a degree) and 96o in the reg- 

 ular course, equal to 1 120 English miles, (of 69^ to a degree;) 

 but if the Monongahela be deemed the main upper branch, the 

 whole course will be 1360 English miles, while if the Allega- 

 ny be considered as such, the whole length of the Ohio will be 

 found equal to 1405 such miles. 



Adjacencies. It flows through Pennsylvania as far as Mill 

 creek belovv Georgetown; it divides afterwards the state of Ohio, 

 which lie on the right bank from Virginia; this state extends 

 on the left bank as far as Sandy river, where Kentucky begins, 

 and it occupies the remainder of the left bank, as far as the 

 Mississippi. While the state of Ohio terminates on the north 

 side at the Miami river: the state of Indiana follows as far as 



