BY J. J. DE FERRER. 159 



ON THE RIVERS OHIO AND MISSISSIPPI. 



THESE Latitudes, which were ascertained in the months of 

 May and June 1S01, were observed with a circle of reflection, 

 and an artificial horizon of Mercury; and the Longitudes by the 

 assistance of two chronometers ; one made by Arnold No. 396", 

 the other by Earnshaw No. 306 suspended in gimbols. Their 

 going was carefully observed at Pittsburgh and at New-Orleans, 

 and from the regularity observed in their going, reliance is to 

 be placed on the exactness of the difference of meridians- 



ON THE OHIO. 



Latitude. Long, (in time) 



W. of Greenwich. 

 o i 11 h t u 



Pittsburgh 40 26 15 5 19 53 



Great Kanhawa 38 51 54 5 28 32 



Galiopolis 38 49 12 5 28 41 



Guiandot 38 25 00 5 29 16 



Sciota Kiver 38 43 28 5 -31 54 



Vance Ville 38 35 00 5 33 00 



Manchester 38 37 00 5 34 05 



Cincinnati (Fort Washington) 39 05 54 5 3" 50 



Louisville 38 15 48 5 42 39 



Falls of Louisville, (2 id. N. W. of L.) 37 17 14 



Blue River 38 11 00 5 44 53 



Green River 37 52 42 5 49 42 



Diamond Island , 38 14 16 5 49 28 



Wabash River 37 49 15 5 52 02 



Fort Massac 37 13 00 5 54 31 



Wilkinson Ville 37 15 00 5 55 40 



Confluence of the Rivers Ohio and Mississippi 37 00 20 5 56 24 



ON THE MISSISSIPPI. 



o i » h / w 



Sand Island (arena) 36 27 28 5 57 40 



New- Madrid 36 34 30 5 58 03 



East point of Devil's Island, with a Cliff on the East bank 7 „„ _, _, 



of the R.vcr j .^ 24 24 5 59 54 



Channel between two Islands 33 58 00 6 4 35 



Island 33 04 30 6 4 57 



Island 32 36 22 6 4 14 



Cc nfluence of the Rivers Yazoo and Mississippi 32 28 00 6 4 12 



Walnut Hills 32 24 37 6 3 49 



Grand Gouflre „ 32 04 30 6 4 27 



Na chez 31 33 48 6 5 54 



Spanish Limits 31 00 00 6 6 43 



Red River 31 01 15 6 7 11 



Point Coupee (1st Church) 30 45 00 6 5 56 



Falte River 30 42 00 6 5 32 



The Yellow Clifl's (escapardo) 30 40 00 6 5 04 



N. rthern poiat of the last Island 30 36 00 5 6 23 



New Orleans 29 57 30 6 38 



South West Pass 28 56 00 5 57 56 



