MAGNETIC O B S E 11 V A T I O N S. 



31 



Observations of the Sun, made April 2d, 1866, to determine the true bearing of the object used as an 

 azimuth mark in swinging the ship at Valparaiso, Chile. 





5" 



IO m 



1 1 



5' 

 20 





IIO° 



20' 

 35 







12 



10 



O 





42 



T 



Chronometer slow 



5 

 



I I 



9 



12 



2 5 



no 

 + 



3 2 

 17 



r 



— 



3 



3- 



c 

 r 





— 



Apparent time 



5 



17 



5 



1 10 



49 



S 





79° 



5 



1 6' 



7 



83 



52 

 8 



N» 



M 



+ 



33 



2 5 



2 

 40 

 42 



a 



b nearly 

 C 



83 

 90 

 1 10 



44 

 56 



True bearing of sun 









• N. 79° 



49' w. 













56 



True bearing of 1 





• N. 31 



7 E. 



Observations of the Sun, made April 27///, 1S66, to determine the true bearing of the object used as an 

 azimuth mark in swinging the ship at Callao, Peru. 





7 h o m 30 5 



2 20 



3 5° 



a 



s 

 c 



r 

 a 



b nearly 

 C 



ioo° 50' 



55 

 101 1 



T 



Chronometer fast 



r 



7 2 13 



1 1 1 



+ 2 27 



100 55 

 + 17 



Apparent time 



6 53 39 



IOI 12 



S 



? 

 M 



— 76° 35' 

 13 5 1 



— 12 3 



+ 46 44 



— 5S 47 



80 12 



— 5 

 80 7 

 90 



IOI 21 



N. 73° 26' E. 



101 21 



88 34 



True bearing of Light-house S. 83 21 W. 



True bearing of sun 

 I Sun to flagstaff 

 / Flagstaff to Light-house . 



Observations of the Sun, made May 13th, 1866, to determine the true bearing of the object used as an 

 azimuth mark in swinging the ship in Panama Bay, New Granada. 





6 h j 7 m 3 » 



18 15 



£2 



s 

 c 



r 



r 

 a 



b nearly 

 C 



S6° 56' 

 58 



T 



Chronometer fast 



r 



6 17 39 

 20 17 

 + 3 53 



6 1 15 



86 57 

 + i7 



Apparent time(P.M.) 



87 14 



/ 



M 

 $ — M 



9°° I 9' 

 18 31 



8 55 



89 3 



— 80 8 



86 54 

 — 14 

 86 40 

 90 

 86 14 



