66 ICHTHYOLOGIA OHIENSIS 



more than sixty Steam boats, averaging the burthen 

 of 150 tons each. The ascent is effected, besides 

 steam, by sailing, poling, warping, and rowing, and 

 is very tedious. The difficulties of the navigation 

 consist in bars, sunken rocks, rocky ledges, snags 

 or sunken logs, sawyers or moving snags, drifted 

 logs, planters or upright trees, falling trees, sinking 

 banks, sudden storms, rises and falls, drifting ice, 

 rejecting currents, whirlpools, shallow water, ripples 

 and rapids, &c. : but they are not dangerous except 

 at some particular stages of the waters. In the 

 spring rise the water is so deep that it may easily 

 float vessels of 500 tons, even over the falls. Many 

 large ships were built at Pittsburgh and Marietta, 

 which safely reached the sea; [I. 363] [/j] but since 

 the introduction of Steam boats. Ships have been 

 disused. 



Towns. There are already more than 125 towns 

 and villages built on the Ohio. The city of Pitts- 

 burgh, at the head of it, contains nearly 15000 inhab- 

 itants. Cincinnati, in Ohio, contains above 10,000. 

 The other principal towns are : Louisville, in Ken- 

 tucky, at the falls, about 5000: Steubenville, in Ohio 

 about 3000: Maysville or Limestone, in Kentucky, 

 about 2000: besides, Beavertown, in Pennsylvania: 

 Wheeling, in Virginia: Marietta, in Ohio, at the 

 mouth of the Muskingum : Gallipolis in Ohio : Ports- 

 mouth, Ohio, at the mouth of the Scioto : Augusta, 

 in Kentucky: Newport, K. at the mouth of Licking 

 River: Owensborough, K. Hendersonville, K. Vevay, 

 in Indiana : Lawrenceburg, Ind. at the mouth of the 

 great Miami: Madison, Indiana: Jeffersonville and 

 New- Albany, Indiana, both at the falls : Evansville, 

 Indiana: Shawneetown, in Illinois, &c. 



