The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 353
n of the current isreversed, and it now flows from the positive polethrough s and / to the earth, and from the earth at thedistant station through the apparatus to the line, andfrom the line through b and s to the negative pole>and through the battery to the positive pole, complet-ing the… … while the direction of the current through the batteryremains, of course, unaltered. The Polarized Relay.—The polarized relay, shown mFig. Ill, is constructed with a curved steel magnet, THE ELECTRIC TELEGRAPH. H^ whose north pole, iV, we may, for convenience, supposeto be at the upper end, and its…
Electricity · Magnetism
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