24 



REPORT ON 



Double Altitudes of the Sun for Time, observed on the Island of San Lorenzo, near Callao, Peru, 



April 26th, 1866. 



Index correction. 



i7 m 45" 





123 



18 52 







20 3 







22 46 





123 



24 2 







25 18 







Ex. ther. 



8o° 



Refraction 



= — 29". 2 



Parallax 





= + 4-o 



3° 



IS 



30 



2© 359 " 



2© 359 II IO. O 



15 



15. 



Correction = -+- 16' 55". o 



At. ther. Bar. 



Sun's declination + 13 35' 18" 

 Latitude — 12 5 14 



123 15 



i2 m 33 8 .o 



Mean of observed double altitudes 

 Local apparent time . 

 Equation of time 

 Local mean time 

 Mean of chronometer times 

 Chronometer fast of local mean time 

 Longitude west .... 

 Chronometer slow of Greenwich mean time 



Double Altitudes of the Sun for Time, observed at Payta, Peril, May 7th, 1866 



I 



10 



14.2 



I 



21 



27.7 







11 



i3-5 



5 



9 



9.1 



4 



57 



S5-6 



4° m 44 E -5 







62 



4i 17-5 







J 5 



41 5 1 







3° 



43 i-5 







62 



43 34-5 







15 



44 7-5 







3° 



Ex. ther. 



78 









Refraction 





= — 



90". 7 



Parallax 





= + 



7-3 



Index correction. 



2© 



2© 



359° 



11' 



3°" 



2 5 



2 5 



o° 



15' 



0" 











359 



11 



26.7 







15 



0.0 



At. ther. 



Correction = + 16' 46". 6 



8o° Bar. 30.06 inches. 



Sun's declination + 16° 50' 46" 

 Latitude — 5 5 36 



Mean of observed double altitudes 

 Local apparent time . 

 Equation of time 

 Local mean time 

 Mean of chronometer times 

 Chronometer fast of local mean time 

 Longitude west .... 

 Chronometer slow of Greenwich mean time 



32° 



■15 



.0 



8" 



19 11 



2 2 s . 3 





3 



38.I 



8 



15 



44.2 



8 



42 



26.I 







26 



4I.9 



5 



24 



22.0 



4 



57 



40.I 



Double Altitudes of the Sun for Time, observed on Flamenco Island, Panama Pay, May 14th, 1866. 



Index correction. 



24 m 59 s 

 25 3i 







95° 



0' 

 15 



°"X - 



O ^2© 



26 3-5 









3° 



O ) 



27 12 







95 







° 1 r. 



27 43-5 









15 



O \20 



28 15 









3° 



O \ 



Ex. ther. 



85 









At. mer. 



Refraction 







49" 



5 





Parallax 





= + 



5-' 







359° 



11' 



3°" 



o° 



15 



10" 







20 





14 



55 







20 





14 



40 



359 



11 



2 3-3 







14 



55-° 



Correction = + 16' 50". 8 



85" Bar. 30.10 inches. 



Sun's declination + 18 39' 49" 

 Latitude 4- 8 54 31 



