16 



REPORT ON 



Equation of time 



Local mean time 



Mean of chronometer times 



Chronometer fast of local mean time 



Longitude west .... 



Chronometer slow of Greenwich mean time 



— o h i6 m ii b . 6 



3 



n 



4°-3 



3 



16 



20.4 



o 



4 



40.1 



5 



S 



9.8 



5 



o 



29.7 



Double Altitudes of the Sun for Time, observed at Fort Christian, St. Thomas, West Indies, 

 November 13th, 1865. 



o m 42 s . 5 



84 



3 2 



5° 



1 21.5 





46 



20 



2 2 





57 



3° 



3 2 -5 



85 



16 



5° 



4 4 





35 



10 



4 54 



85 



5 1 







6 0.5 



87 



15 



20 



6 41 





28 



3° 



7 10 





37 







7 54-5 





5° 



20 



8 21.5 





59 



20 



8 48.5 



88 



7 







Ex. ther. 8 



4° 





i 



Refraction 



= — 57 



'•7 





Parallax 



= + 6 



2 





2© 



Index correction 

 359 10' 50" 



16' 20" 

 16 10 

 16 40 



At. ther. 



3 :<) 11 0.0 o 16 23.3 



Correction =4-16' 18". 4 



86° Bar. 30.12 inches. 



Sun's declination — 18 5' 2". 5 

 Latitude 4- 18 20 27. 



Mean of observed double altitudes 

 Local apparent time . 

 Equation of time 

 Local mean time 

 Mean of chronometer times 

 Chronometer slow of local mean time 

 Longitude west .... 

 Chronometer slow of Greenwich mean time 



26' 25". 8 



I m 20 8 .0 



I 5 3 1 - 2 

 45 48.8 



5 5- 2 

 40 43.6 



19 



42.7 

 26.3 



Double Altitudes of the Sun for Time, observed at Isle Royal, Salute Islands, November 2&th, 1865. 



47 m 



58° 



109 



58' 



20" 



48 



35 



no 



9 



5° 



49 



8 





20 







49 



58 





35 



3° 



5° 



3i 





45 



5° 



5° 



56.5 





5 2 



5° 



51 



44-5 



112 



13 







5 2 



39-5 





30 







53 



!3-5 





40 







53 



47 





5° 







54 



19 



"3 











54 



53-5 





10 







Index correction. 



2© 



2Q 



359° 



11' 



0" 



o° 



15' 



5°" 





11 









16 









10 



5o 





16 



10 



359 



10 



5 6 -7 







16 



0.0 



Correction = + 16' 31". 6 



Ex. ther. 93 

 Refraction = — 36". 3 

 Parallax = + 4.9 



At. ther. 



Mean of observed double altitudes 



Local apparent time . 



Equation of time 



Local mean time 



Mean of chronometer times 



85 Bar. 30.13 inches. 



Sun's declination — 21 23' 30". 3 

 Latitude +5 17 29. 



in° 35' 26". 6 

 i° h 33 m 3 lS - 8 



- 11 43-8 



10 21 48.0 



8 51 28.6 



