xxxii Astronomical arid Meteorological Records^ ^c. 



Aug. 9, 1820. 



Aug. 12, 1820. 



Aug. 13, 1820. 



Aug. 14, 1820. 



Meridian double altitude of 

 star Altair 



Index error + 22". Latitude 

 deduced 



Meridian double altitude of 

 star Altair 



Index error + 22". Latitude \ 

 deduced - - - 3 



Meridian double altitude of \ 

 star Altair - - ^ 



Index error + 22". Latitude \ 

 deduced - - S 



Meridian double altitude of 

 star Altair 



Index error + 22". Latitude 

 deduced 



Mean latitude of the mouth of De Moyen 

 river deduced from the preceding results 



116° 05' 30" 



40 21 50 N. 



116 05 20 



40 21 55 N. 



116 05 40 



40 21 45 N. 



116 05 30 



40 21 48 N. 



40 21 48 N. 



Observations made at the confluence of the Illinois and Mississippi 



Rivers. 



Equal altitudes of Sun to find error of Time-piece, (box chrono- 

 meter,) at noon. 



Auff. 31, 1820. 



Aug. 31, 1820. 



Time from Noon, 

 A.M. 



9.^ 40' 09" 

 2 38 32i 

 2 36 56 



EiTor of Time- 

 piece. 



12' 38" slow. 

 Mean time. 



Meridian double altitude of star \ 

 Altair, («. Aquilge) 5 



Index error + 22". Lat. deduced 



118° 52' 30" 



38 58 19 N. 



Equal altitudes of Sun to find error of Time-piece, (box chronome- 

 ter,) at noon. 



j Time from Noon, 

 A.M. 



Sept. 2, 1820. 



3" 15' 57" 

 3 14 27 

 3 12 57 



Time from Noon, 

 P.M. 



2" 41 

 2 39 

 2 38 



' 18" ") 

 48 I 

 18 J 



Error of Time- 

 piece. 



16' 32" slow. 

 Mean time. 



