Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development (1922)
Drinker, Frederick E. [from old catalog], Lewis, James G., [from old catalog] joint author · [Philadelphia, Printed by National publishing co.] · leaf 233
LOOP These symbols are used in diagrams to indicate the various partsof radio apparatus. 206 EADIOTELEPHONY showing the actual construction and operation of the sta-tion. All radio sets are based upon the plans just given andiheir efficiency is merely increased by the additions of re-finements in…
Radio
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