72 On the Construction of the Galvanic Battery, 



3 



i 



s 





/ 

 W 4 



s 



,.B « _ . <*«' 



T, Trough of wood. 



B, Bar of support. 



U, Uprights, with a notch at top to re- 

 ceive the bar. 



C, Copper cell, to which 



W, Suspensory piece, is soldered. 



Z, Zinc plate. 



S, Copper slip soldered to the copper 



cell at one end, and next zinc plate at 



the other end. 



Fig. 1 represents the form of the zinc plate, which is rhom- 

 boid al, with a projection at the upper part, to which is sol- 

 dered one end of the slip connecting it with the next copper 

 plate. It is made of rolled zinc. 



Fig. 2 gives the form of the copper plate, which is formed 

 into a cell open at top. In order to form it the copper should 

 be cut in the shape given at 



