Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 92
^ with solid depolarizer, but is ad-mirably adapted for use on … Fig. 90. Section through car-closed circuit b^n cylinder showing7 (. TT , T j_ _L • MnOo depolarizer. icork, as tor small motors, electrotypmg, .^.^j^..._.. etc. Zinc is the positive, and black oxide ofthe neo:ative element. The exciting liquid telegraphy. copper (CuO). is a solution of caustic…
Electricity · Magnetism
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