Astronomical and Meteorological Records, ^c. xxxiii 

 Equal altitudes of Sun to find error of Time-piece, at midnight. 



Sept. 2, 1820. 

 Sept. 2, 1820. 



Time before mid- 

 night. 



9" 21' 42" 

 9 20 12 

 9 18 42 



Time after mid- 

 night. 



8" 46' 15' 

 8 44 44 

 8 43 13A 



2 J 



Meridian double altitude of 

 star Altair 



Error of Time- 

 piece. 



17' 42" slow. 

 Mean time. 



118° 52' 15" 



Index error + 22".Lat. deduced 1 38 58 27 N. 



Equal altitudes of Sun to find error of Time-piece, at midnight. 



Sept. 3, 1820. 



Time before mid- 

 nia:ht. 



9" 00' 08|" 

 8 58 40i 

 8 57 14 



Time after mid- 

 night. 



19 

 18 

 17 



' 56" ■) 

 31 [ 

 04 J 



Error of Time- 

 piece. 



19' 38" slow. 

 Mean time. 



Latitude of the mouth of Illinois river, by a mean 

 of the observations made at that place on the 21st 

 of August and on the 2d of September, 1820, 



38° 58' 23" N. 



On the 3d of August, 1820, an immersion of Jupiter's third satellite 

 •was observed at S^ 10' 40" P. M. per time-piece. Also an immersion 

 of Jupiter's first satellite was observed at 13" 16' per time-piece — ^to 

 find the longitude. Allowance to be made for the error and varia- 

 tion of time-piece, agreeably to the foregoing results, from equal 

 altitudes. 



Longitude deduced from the immersion of Jupi- 

 ter's third satellite - - - - 

 Do. do. first do. - _ . 



Mean longitude west of Greenwich 



90° 15' 30" W. 

 90 20 30 W. 



90 18 



Observations made at Cape Girardeau, on the Mississippi. 



Oct. 15, 1820. 



Oct. 16, 1820. 



Vol. IT. 



R 



