Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 30
e that the effect inS takes place only when the circuit of Pis made and broken. When current isflowing in P continuously, the magneticlines of force are stationary, and conse-quently current is not induced in S. Butwhen the lines of force about S rise andfall, then there will be a movement of… … 20 PRACTICAL WIRELESS TELEGRAPHY.
Telegraph, Wireless
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