MAGNETIC OBSERVATIONS. 



113 



Horizontal Intensity. Observations of Deflections. 







Rio Janeiro, 



fanuary 



6, 1866. 









Rio Janeiro, 



fanuary 



6, 1S66. 





c 



J3 - 



Time. 



Temp. 



3) 

 v .£ 



"3 "° 



s i 



Diff's. 



Dist. 



Fn 



JS . 



Time. 



Temp. 



OJ c 



E 1 



1 tiff' . Dist 



s 



w. 





t 



*l 



<* 









S 





t 



w « 



5 S 









6 h o m 



75° 



39 d -i 











w. 



(jh 1 Q m 



74° 



5&'.2 









~ 



K. 







109.0 



39 d -o 



69". S 





•J 



E. 







92.0 



S6*.2 



35 d -7 





jo 



W. 







39-o 



108.8 





« 



VV. 







56.2 



91.9 







"* 



E. 







1 08. 6 







j 



> 



E. 







91.8 



























a 





E. 







i°9-4 







q 





E. 







92.0 







R 



• 



VV. 







39-4 



109.3 





II 



^j 



W. 







56.2 



92.1 



35-9 



Si 



K. 







109.2 



•39-4 





k 



d 



E. 







92.2 



56.2 





"* 



w 



W. 



6 10 



74 



39-3 









w 



W. 



6 20 



74 



56.2 





























Means 





74-5 



2U d 



69.85 



Means 





74.0 



2u d 



35-So 









Coefficie 



it of to 



sion, z< = 



5-77 <« 



V. 









Vlonte Video, January 



l8, 1866. 





Vlonte Video, 



fanuary 



18, 1866. 











So 



g j 















Si 



S.j, 







Fn 



J3 • 



Time. 



Temp. 



73 "3 





Diff's. 



Dist. 



c 





Time. 



Temp. 



■3 ^ 





Diff's. 



Dist. 



s 



° f 







"1 



3 g 







W 



F 





t 



ra l 



< s 









w. 



4" 35 m 



8 7 ° 



37 d -2 











W. 



4 h 45m 



87° 



54 d -4 









- 



E. 







105.9 



37 d -3 



6S-1.7 





to 



E. 







89.5 



54 d -4 



35 dl 





£ 



W. 







37-4 



106.0 







W. 







54-4 



S9-S 







E. 







106.0 







q 

 ri 





E. 







S9.5 



























C 





E. 







106.0 









E. 







89.7 







ti 





W. 







37-7 



106.0 



6S.0 



II 





W. 







54-7 



89.6 



35° 



II 



rt 



E. 







105.9 



38.0 





k. 



S3 



E. 







89.6 



54.6 





*■ 



w 



W. 



4 45 



87 



38.3 









w 



VV. 



4 55 



88 



54.6 





























Means 





87.0 



2U d 



68.35 



Means 





87.5 



2ll d 



35-o5 







Coefficient of torsion, v=z 



4.50 div. 









Sandy Point, February 7, 1866. 







F. 



Tim?. 



Temp. 

 t 



"3 "3 



E a 



Diff's. 



Dist. 



1 



W. 



E. 

 W. 

 E. 



12" 45™ 



72° 



43 d - 

 110.2 



44.0 

 1 10.3 



43 d - 5 

 uo.3 



66 d . S 







ji 













w 



E. 

 W. 



E. 

 W. 



1 8 



69 



1 10. 7 

 42.6 

 1 10.9 



42-5 



110.S 

 42.6 



68.2 













Means 





70.5 



2U d 



67.50 



A 



unstc 



high 



adv. 



Coefficie 

 wind blov 



it of to 

 ring \vh 



-sion, v = 

 ch made t 



8.25 di 



lie mag 



ict very 





Sandy Point, February 7, 1866. 













s 





c 



3 



J2 . 

 g — 



F 



Time. 



Temp. 

 t 



w 5 

 "3 "3 



£ § 



Diff's. 





W. 



i» S m 



69° 



5S d .8 







~ 



E. 







93-2 



5S d -6 



34 d - 6 



£ 



W. 







58.3 



93-2 





E. 







93-2 



















E. 







93-4 







i 



VV. 

 E. 







58.9 

 94.0 



93-7 

 59.0 



34-7 



w 



VV. 



1 23 



68 



59- 1 















M 



:ans 





6S.5 





2U d 



34-65 



i5 J.uiy. 1872. 



