xxii Astronomical and Meteorological Records, &?c. 



Equal altitudes of the star Capella, (*. JlurigoB,) to find the error 

 of Time-piece, (box chronometer,) at the time of the starts tran- 

 sit over the meridian. 



Dec. 19, 1819. 



Time before tran- 

 sit by astronomi- 

 cal account. 



6" 46' 41" 33'" 



Double altitudes 

 of star Capella. 



85° 10' 00" 



Error of Time-piece deduced 

 for mean time 



Time after transit 

 by astronomical 

 account. 



15" 42' 35" 46'" 



3' 06" 47" 'fast. 



These observations are a mean of nine sets of altitudes, taken un- 

 der favourable circumstances. 



The variation of the Time-piece, (box chronometer,) between the 

 noon and midnight of the 19th December, by equal altitudes of the 

 sun as above, is found to be 49" 38'" losing. Taking this as its rate 

 in twelve hours, and supposing it to possess a perfectly uniform mo- 

 tion, by making a proportion for its error at the time of Capella's 

 transit over the meridian, it would appear to be 3' 05" 33'" fast 

 for mean time ; but its error at that time is found by observation to 

 be 3' 06" 47'", making a difference of 1" 14"' from a truly uni- 

 form rate in the space of 11" 14' 02i" of time. This difference is 

 not more than might reasonably be attributed to errors of observations 

 in the two sets of equal altitudes. 



Double altitudes of the star Rigel, C^. OrioniSjJ observed when near 

 the meridian, together with the correct times before and after the 

 transit — to find the latitude. 



Dec. 19, 1819. 



Dec. 20, 1819. 



jlndexerror — l'04".Lat.deduc.| 41 25 04 N. 



