Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 225
, form of the Leclanche cell is the Gondacell. The elements are shown in Fig. 109. Here the manganese is powdered, mixed with cheapmolasses, then bv heat a,nd pressure formed into slabs. 226 ELEMENTARY ELECTRICITY These are attached to the carbon plates by rubber bands. The bother and resistance of… … Fig. 110. Elements of Gravity Cell and Jar. The Gravity Cell. This is a closed circuit cell withpolarization prevented. It is very much used for tele-graph circuits, operating the electrical devices in thelock and block signals, the motors in automatic signalsand generally around interlocking…
Electricity
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