1)1 KS ILL & BeJJSOX. 



Phil. Mag. Ser. 6, Vol. 38, PI. VII. 



Fig. 1. 



View of magnet-testing iiisiriiment with magnet in position. 



Fig. 





IE SSOB mmffik <- 

 BBS ■? 





"%f 









« 



H fiflfilp 





>'■ e 





•' 



W# 



^^^^^^ 





[instrument ready for test of coercive force 



