NOTES ON MAGNETIC DISTRIBUTION 81 



hypothesis, combined with what is known with regard to the magnetiz- 

 ing function of iron. This will be shown in the paper I am rewriting. 

 It seems to me that M. Jamin's method is very defective; and I know 

 of no method of experimenting, which is theoretically without objection 

 except that of induced currents, and this I have used in all my experi- 

 ments on magnetic distribution for the last four or five years, and have 

 developed into a system capable of giving results in absolute measure. 

 Mr. Jacques is to be congratulated on pointing out these errors in 

 M. Jamin's conclusions. 



Troy, June 7, 1875. 



