262 POPULAR LECTURES AND ADDRESSES, 



ever on the matter of a living body placed there, 

 seems to me not proved even yet, although nothing 

 has been found. It is so marvellous that there 

 should be no effect at all, that I do believe and 

 feel, that the experiment is worth repeating ; and 

 that it is worth examining, whether or not an 

 exceedingly powerful magnetic force has any per- 

 ceptible effect upon a living vegetable or animal 

 body. I spoke then of a seventh sense. I think 

 it just possible that there maybe a magnetic sense. 

 I think it possible, that an exceedingly powerful 

 magnetic effect, may produce a sensation that 

 we cannot compare with heat or force, or any 

 other sensation. 



Another question that often occurs is, " Is there 

 an electric sense ? " Has any human being a 

 perception of electricity in the air? Well, some- 

 what similar proposals for experiment might, 

 perhaps, be made with reference to electricity ; but 

 there are certain reasons, that would take too long 

 for me to explain, that prevent me from placing 

 the electric force at all in the same category with 

 magnetic force. There would be a surface action 



