MAGNETIC OBSERVATIONS. 



21 



Ex. ther. 76 

 Refraction = — 130". 2 

 Parallax = -f 8.0 



At. ther. 



79 Bar. 



Sun's declination — 

 Latitude — 



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 



3°- 



02 inches. 



20° 



26' 55". 2 



34 



53 39 



45° 



32' 3°"-° 



5 h 



3 m 5 s - 2 



h 



10 51.4 



5 



13 5 6 - 6 



4 



2 29.6 



1 



11 27.0 



3 



44 55-8 



4 



56 22.S 



Double Altitudes of the Sun for Time, observed on Rat Island, harbor of Monte Video, Uruguay, 



January 24th, 1866. 



"1 Index correction.. 



l 20 



2 



2 9 m I S .S 







82 1 



3°' 



29 25.5 









20 



29 5°-5 









10 



3°" i3-5 







82 







30 38-5 







81 



5° 



3i 38-5 







82 



3° 



32 3 









20 



32 26 









10 



32 Si 







82 







33 l6 







81 



5° 



Ex. ther. 



74 



° 







Refraction 







62' 



•7 



Parallax 





= + 



6. 



S 



359° 



10' 



10" 



o° 



15' 



40" 





10 



10 







40 





10 



10 







20 



359 



10 



10.0 







IS 



33-3 



Correction = + 17' 8". 3 



At. ther. 



Bar. 

 Sun's declination — 

 Latitude — 



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 



Double Altitudes of the Sun, for Time, observed at Sandy Point, in the Straits of Magellan, 



February "jth, 1866. 



1 Index correction. 



9° 



6' 



33"- 8 



4 



53 



18 



82 



10' 



o".o 



3 h 



3°" 



5*-7 





12 



29.2 



3 



42 



34-9 



2 



3i 



8.4 



1 



11 



26.5 



3 



44 



52-9 



4 



56 



19.4 



59 m 24 s -5 





90 



3° 



11 







40 



1 1 







5° 



1 49-5 





9i 







2 37-5 







10 



4 39-5 





90 



3° 



5 27.5 







40 



6 18.5 







5° 



7 9 





9i 







7 58-5 







10 



Ex. ther. 52 



» 







Refraction = 



= — 



56" 



9 



Parallax = 



= + 



6. 



1 



2© 



2© 



359° 



10' 



20' 

 3° 

 35 





0° 



15' 



40' 

 5° 

 35 





359 



10 



28. 



3 







15 



4i- 



7 



Correction = + 16' 55". o 



At. ther. 70 Bar. 30.04 inches. 



Sun's declination — 15° 14' is".6 

 Latitude — 53 10 20 



Mean of observed double altitudes ..... 90 50' o' 



Local apparent time ......•• i° h 2 m 2". 2 



Equation of time . . . . . • • •+ 1 4 25.5 



