St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 40
Fig. 39 shows one form of bi-chromate cell. It furnishes a large quantity of current,and as the zinc can be raised from the fluid, it may bekept charged ready for use for many months, and can beset in adlion any time when required by lowering thezinc into the liquid. Two of these cells will burn a… … Fig. 39- 38 VARIOUS VOtTAIC CELLS. 52. The Grenet Cell. Fig. 40 is another form ofbichromate cell. The carbon plates are left in the fluidconstantly. The zinc plate should be raised when thecell is not in use, to keep it from being uselessly dissolved.
Electricity
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