The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 356
that of b\ hencearmature L is attracted to pole of a and repelled frompole of b. m Supposing the above conditions to exist when mes-Jsages are about to be sent in opposite directions simul-taneously; let the connections through pole-changer Abe reversed by depression of the key, putting the… … I
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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