MAGNETIC OBSERVATIONS. 



117 











Horizontal Intensity. 



Observations of Deflections. 









Acapulco, May 30, 1S66. 





Acapulco, May 30, 1S66. 











Sj 



" ,rf 















| 



",' 







.e . 



Time. 



Temp. 



"n "3 



s § 



Diff's. 



Dist. 



Pn 



•5 ■ 



Time. 



Temp. 



•3 



c c 



Diff's. Dist. 

































s 



£ " 







w iS 



<~ 







>s, 



2 " 







Pi 



<~ 







W. 



7b 22 m 



86° 



53 d -9 











\v. 



7 h 3 2 "' 



84 



66 d .9 









"tn 



E. 







107.0 



S3 d -9 



53 d . 1 





■s 



E. 







94.1 



66". 9 







$ 



W. 







53-9 



107.0 









VV. 







66.9 



94.2 







E. 







107.0 











E. 







94.2 











































q 





















E. 







107.5 









E. 







94-4 







"S 



^ 



VV. 







53-5 



107.6 



S4-o 



II 





W. 







66.8 



94-4 





II 



d 



E. 







107.7 



S?-° 



k 



« 



E. 







94-4 



66.8 







W 



VV. 



7 32 



84 



53-8 









w 



VV. 



7 40 



85 



66.8 





























Means 





S5.0 



2u d 



53-55 



Means 





84.5 



2U d 



27-45 





Coefficient of torsion, ^ = 3.45 div. 





Magdalena Bay, June 



9, 1S66. 



Magdalena Bay, June 



9, lS66. 













Oj 

















2 ■ 







































c 



-5 _j 



Time. 



Temp. 



"3 ~3 



c g 



Diff's. 



Dist. 



c 



jS . 



Time. 



Temp. 



■%'•% 



i s 



Diff's. 



Dist. 



s 



5 c 





/ 



*! 



< s 







I 



£ 

 53 " 





t 



1/3 (S 



< 









W. 



i u I4 m 



65" 



49 d -4 











W. 



i b 40™ 



65° 



64 d .o 









~ 



E. 







106.6 



49 d -4 



57 d -3 





4J 



E. 







93-1 



631.9 



2 9 d -7 







VV. 







49-4 



106.7 





> 



VV. 







63-7 



93- 6 







> 



E. 







106.8 











*" 



E. 







94.1 





























E. 













q 

























106.7 









E. 







94-7 







. 



■ 



VV. 







49.6 



i°7-3 



57.6 



1 



^J 



W. 







65.0 



95-' 



29.7 



II 



■u 



K. 







107.9 



49-7 







rt 



E. 







95-4 



65-4 





K 



w 



VV. 



1 40 



65 



49-7 









w 



VV. 



2 15 



65 



65.8 





























Means 





65.0 



2U d 



57-45 



Means 





65.0 



2U d 



29.70 





Assumed coefficient of torsion, 



7^ = 3.87 div. 









Magnet very unsteady, and its readings 



uncertain on account 









of a stiff breeze which shook the in 



>trument. 









San Diego Bay, June 1 



5, 1866. 



San Diego Ba 



y, June 



15, 1866. 













S . 















S> 



- » 







c 



£ . 



Time. 



Temp. 



"3 ^ 



a c 



Diff's. 



Dist. 







Time. 



Temp. 



13 "3 



c g 



Diff's. 



Dist. 



8 



s 





t 



^1 



5 S 







§ 



£ 

 55 " 





/ 



*l 



< s 









w. 



2» 44°" 



72° 



45 d -9 











W. 



2» 53- 



71° 



62 d .2 









~ 



E. 







in. 3 



46*. 1 



65 d .2 







E. 







95-4 



62 d .2 



33 d - 2 





:> 



VV. 







46-3 



in. 3 







> 



VV. 







62.2 



95-4 







"*" 



E. 







in. 2 











E. 







95-4 











































q 





















E. 







112.6 









E. 







95-4 







« 





W. 







45.8 



112.5 



66.7 



II 





VV. 







61.6 



95.6 



33-9 



II 



3 



E. 







112.5 



45-8 







« 



E. 







95-8 



61.7 





K 



W 



W. 



2 53 



7i 



45.8 









w 



VV. 



3 6 



70 



61.8 





























Means 





7i-S 



2U a 



65-95 



Means 





70.5 



2U d 



33-55 









Cocfticie 



at of to 



sion, v = 



4.28 di 



V. 





















