Magnetic Influence of Solar Light, 251 

 TABLE IV. 



Shewing Duration of Oscillations of Needle B. after exposure. 



No. of Exp. | 



Date of 

 Exp. 



Hoi 



da 



A. M. 



ir of 

 y. 



P. M. 



Length of 

 Needle. 



Diam. of 

 Needle. 



Temp. 



No. of 

 Oscill. 



Duration 

 of Oscill. 



No. of 

 Traverses. 



Remarks. 





Jan. 







In. 



In. 







Sea. 







] 



13th 



11 





4 



005 



85o 



20 



302 



200 



Sun very brigh 



2 















20 



300 





and powerful, ski 



3 















20 



302 





quite cloudless. 



4 















20 



302 





5 















20 



299 







6 















20 



300 







7 















20 



301 







8 















20 



300 







9 















20 



300 







10 















20 



300 







Sums, ... 

 Means, ... 



200 



3006 







1 



15.03 | 



TABLE V. 



Shewing Duration of Oscillations of Needle B. after farther exposure. 



PExp., 



O 



Hour of 

 Day. 



O 



Diam. of 

 Needle. 



Temp. 



O ~ 



ition 

 scill. 



of 

 irses. 



Remarks. 



| No. o 



Q 



A. M. 



P. M. 



Lengl 

 Nee 





SO 







Jan. 







In. 



In. 







Sea. 







1 



13th 





1 



4 



0.05 



97° 



20 



307 



600 





2 















20 



304 







3 















20 



307 







4 















20 



306 







5 















20 



307 







6 















20 



306 







7 



8 















20 

 20 



306 

 308 







9 















20 



307 







10 















20 



307 















Sums 



, ... 



200 



3065 















Means, ... 



1 



15.352 







