St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 45
e. Zinc is used as the outside case and -^ plate. Fi f. 48 shows the ordinary forms.Fig. 49 shows a number of dry cells arranged in a box with switch in front, so that the current can be regulated at will.59. The Edison-Lelande Cells, Fig. 50, are made in several sizes and types. Zinc and copper… … CHAPTER V. ABOUT PTJSH-BTJTTONS, SWITCHES AND BINDING-POSTS. 60. Electrical Connections. In experimental work,as well as in the everj-day work of the elec5trician, elec-trical connedtions must constantly be made. One wiremust be joined to another, just for a moment, perhaps,or one piece of…
Electricity
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