LAWS OF MAGNETO-ELECTRIC INDUCTION. Ill 



electro-magnet." This argument appears to me to 

 be not quite decisive ; for we can imagine the inertia 

 to be altered by altering the figure of the wire as 

 easily as by altering its length. But my business 

 here is to narrate, rather than to discuss disco- 

 veries; and, however it maybe susceptible of future 

 explanation, we cannot doubt that the view which 

 has been disclosed of the effects of magneto-electric 

 induction, whether or not it be rightly described as 

 electrodynamic reaction, is a step of the highest 

 importance in the progress of this most interesting 

 mechanico-chemical science. 



