Astronomical and Meteorological Records, ^c. 



XI 



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



June 18, 1819. 



Time from Noon, 

 A. M. 



3" 57' 36" 

 3 36 15 

 3 34 55 



Time from Noon, 

 P. M. 



3" 48' 16" 

 3 46 55 

 3 45 35 



} 



Error of Time- 

 piece. 



4' 46" fast. 

 Mean time. 



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



June 19, 1819. 



June 19, 1819. 



Time from Noon, 

 A.M. 



2 45 50} 

 2 44 281- 



Time from Noon, 

 P.M. 



57 

 55 

 54 



' 071"-) 

 461 I 

 25| J 



Meridian double altitude of 

 sun's lower limb 



Latitude deduced 



Error of Time- 

 piece. 



4' 11" fast. 

 Mean time. 



149° 08' 45" 



58 36 36 N. 



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



June 20, 1819. 



June 20, 1819. 



Time from Noon, 

 A. M. 



41" 00' 15" 

 3 58 56 

 3 57 35 



Time from Noon, 

 P. M. 



4'' 09 

 4 08 

 4 06 



' 30" 1 

 51 J 



Meridian double altitude of 

 sun's lower limb 



Latitude deduced 



Error of Time- 

 piece. 



3' 57}'[ fast. 

 Mean time. 



149° 11' 25" 



38 36 05 N. 



Latitude of St. Louis by observation of June 15 

 Do. do. June 19 



Do. do. June 20 



Do. by a mean of the preceding obser- 

 vations ... 



38° 36' 14" N. 

 38 36 36 N. 

 38 36 05 N. 



38 36 18 N. 



Rate of Time-piece between the 17th and 9.0th of June, 1819. 



Variation. 



Fast for mean time 5' 20" 30" 

 Do. 4 46 00 



Do. 4 11 00 



Do. 3 37 30 



34" 30'" losing. 

 35 00 do. 

 33 30 do. 



June 17,1819. 



18, 

 19. 



20, 



JVofe. The foregoing results show the mean rate of the time-piece, 

 (Chronometer by Tobias & Levitt, London,) in three days to be 34" 

 20'" — daily losing. 



Magnetic dip at Belle-Fontaine, Missouri, June 23 I 70° 00' 

 Do. at St. Charles, Missouri, June 25 j 70 05 



