ELECTRIC DISCHARGE WITH THE CHLORIDE OP SILVER BATTERY. 
61 
Fig. 4 shows a cabinet 4 feet inches (140*9 centims.) high, 3 feet 6 inches 
(106*7 centims.) wide, and 17 inches (43*17 centims.) deep, inside measurement, 
containing a battery of 1200 rod-cells, each tray holding 20 cells ; all the wires 
represented are covered with gutta percha, and when they connect shelf to shelf 
they pass through ebonite cylinders fixed in the shelves. Inside the case on the right 
is fixed a switch, as represented in figs. 5 and 6. 
Pig. 5. 
The frame work and the levers H and H' are of ebonite ; the terminal wires from 
the battery are connected to the axes of the lever handles A g and Z respectivelv ; 
when the battery is not required the levers rest in the position shown in the figures, 
when it is to be brought into circuit the handle H is elevated so as to bring the brass 
spring pieces in contact with the brass rods Z' and Kg' which pass to the outside of 
the cabinet, the outer ends of the rods are hollow in order to admit of the insertion 
