290 



Prof. A. Gray and Mr. A. Wood. Effect of a [Mar. 12, 



on the rate of subsidence, which effect it is to be remembered is in 

 nickel an increase.* 



The wire was now allowed to rest for a few days without any weight 



Fia. 3. 











//TO 





// 



7 



s \I 











III V 



















' I 1 1 1 



i r 1 i 



1 1 1 \ 



70 



;6o 



50 



-cs 



^30 



£ 



5 10 

 Galv. deflections. 



15 



upon it ; but it was found that the curve then obtained coincided with 

 curves III, IV, and V, so that the rest seemed to produce no effect. 



The heavy vibrator was now hung on instead of the light one, which 

 had been used in all the previous experiments with both wires. 



* See the former paper, loc. eit. 



