Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 248
fc i … Fig. 77. Fig. 78. about. Both these defects are got over by the use ofaccumulators, and a portable lamp of this kind, manufac-tured by the Edison-Swan United Electric Light Company,is shown in Fig. 77. The lamp is energised by a four-cellaccumulator, shown in Fig. 78. This accumulator is contained…
Electric industries · Electricity
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