Mas^nctic Galvanism. 



79 



Fig. 1 



Fig. 3. 





Fig. 



1st. A permanent connection, by means ofvvires, between one end 

 (Fig. 2. a) of the copper coil and the keeper and between the other 

 end, 5, and the magnet. The silk-bound wire was wound round the 

 middle of the keeper s, n, covered with silk, and confined between 

 two brass circular plates, faced on the inside with silk (in order to 

 prevent any communication between the centre and outer portion of 



