382 Magnetic Influence of Solar Light. 



TABLE X. 



Shewing Duration of Oscillations of Testing Needle, with Cylinder K in 

 front, before and after exposure. 

 Medium Black Silk. 





Exp. 



Hours of 

 Expos. 



o 



o . 



Temp. 



scill. | 



Duration of 

 Oscillations. 





X 







_d S3 



. a 







n 









No. of E 



Date of 



From 



A. M. 



To 



P. M. 



Lengt 

 Cyli 



Diam, 

 Cyli 



Before 

 Expos. 



After 

 Expos. 



No. of ( 



Before 

 Expos. 



After 

 Expos. 



Remarks. 



1 



2 

 3 

 4 

 5 



Feb. 

 24th 



10 



n 

 ... 



In. 



2 



... 



In. 

 0.04 



70o 



99o 



10 

 10 

 10 

 10 

 10 



98 

 98 

 98 

 98 

 98 



96 

 96 

 97 

 97 

 97 

















Sums 



... 



50 



483 



490 















Means ... 



10 



98-8 



96.6 





TABLE XI. 



Shewing Duration of Oscillations of Testing Needle, with Cylinder L in front, 

 before and after exposure. 

 Medium-Yellow Silk. 



f No. of Exp. | 



Date of Exp. 



Hours of 

 Expos. 



Length of 

 Cylin. 



Diam. of 

 Cylin. 



Temp. 



| No. of Oscill.J 



Duration of 

 Oscillations. 



Before. 

 Expos. 



After 

 Expos. 



From 



A. M. 



To 



P. M. 



Before 

 Expos. 



After 

 Expos. 



1 



2 

 3 

 4 

 5 



Feb. 

 24th 



10 



... 



In. 



2 



In. 

 0.05 



70° 



109 



10 

 10 

 10 

 10 

 10 



86 

 87 

 86 

 86 

 86 



86 

 86 

 86 

 86 

 S6 









Sums 





50 



431 



480 



Means ... 



10 



86.2 



86 



Remarks, 



The results of these various experiments with coloured 

 silk media appear to me to shew very distinctly that the light 

 transmitted through them possesses no magnetic properties 

 whatever. Had it been otherwise, that want of uniformity 

 which marks the general results exhibited by the tables, would 

 not have prevailed, and had the increase of intensity been in 

 any way equivalent to that specified by other observers, the 



