Trebel, George. [from old catalog] · New York, F. Tousey · leaf 29
on I will describea pocket battery which any boy can make and which will light a 22 HOW TO MAKE AND small electric light scarf-pin. k or strong currents or closedcircuit work, this is by far the best form of battery. If insteadof the above mentioned solution, a mixture of carbonate of am-monia and… … A copper plate, C, Figure 3, is placed on the bottom of a glassjar and covered with crystals of copper sulphate (blue vitriol),and the whole covered with water. As the vitriol dissolves itsweight causes it to remain at the bottom in contact with thecopper plate. The zinc crowfoot is suspended from…
Electricity
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