Wright, Mark R., 1854- · London : Longmans · leaf 233
Z» ICaFig. 225. … Fig. 226. C and z are strips of metal, connected respectively with thecopper and zinc plates of a battery, z is above C; e and L are Electrolysis—Electro-Magnets 225 two metallic springs called tappers, fixed at E and L; theyordinarily press against Z. l is connected with the telegraph line,that…
Physics
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