St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 42
urface. 55. The Fuller Cell, Fig. 43, is another type ofbichromate cell, used largely for long-distance telephoneservice, for telephone exchangeand switch service, for runningsmall motors, etc. It consists of aglass jar, a carbon plate, withproper connecftions, a clay porouscup, containing the… … 40 VARIOUS VOI.TAIC CELLS.
Electricity
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