IMS 



PROCKKl'INi:- OF THE AMERICAN ACADEMY. 



curreni is not allowed time to attain its final value at each stage, a 

 serious error may be introduced. 



V o s. 



~ — ■■ 



CJ « CO 



o - 



^ - g 



•h *a c 



C U 3 



!T. >- O 



"8 " 3 2 



B ♦. - 



,0 - 



(=- ■ 2 



g 



B S 



5 • 3 



•S3M3dWV 



The amount of flux which, in a given large mass of iron, in a given 

 magnetic condition at the outset, corresponds to a current of given final 



