MAGNETIC OBSERVATIONS. 



23 



Ex. ther. 67 At. ther. 65 Bar. 30.17 inches. 



Refraction =_69".8 Sun's declination + 6 53' 28".6 



Parallax = + 6.7 Latitude 33 i 47 



Mean of observed double altitudes 



Local apparent time 



Equation of time 



Local mean time 



Mean of chronometer times 



Chronometer s\o\ 



Longitude west . 



Chronometer slov 



Double Altitudes of the Sun for Time, observed in Valparaiso, Chile, April "jth, 1866. 



2Q Index correction 



2 



9" 



= + 17' o".o 



Ex. ther. 67 

 Refraction = 6 7". 3 

 Parallax = + 6.6 



At. ther. 



65 



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 in Valparaiso, Chile, April i^th, 1866. 



3" 5<3 m 20'. 5 

 5 1 i-5 

 5 1 39 

 53 7 



53 46 



54 24.5 



36 30' o") 



15 o C 2 Q 



o o 3 



36 30 o 



IS o 



Index correction. 



359 10' 40" 

 40 



45 



14- 50" 



45 

 5 



Ex. ther. 65 

 Refraction = 1 70", 3 

 Parallax = + 8.1 



At. ther. 



359 10 41.6 o 14 48.3 



Correction = -f 17' is".o 



66 Bar. 30.13 inches. 



Sun's declination 4- 9 33' 33". 6 

 Latitude 33 i 47 



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 



