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 72
Copyright, Underwood & Underwood, N. T. USING RADIO TO DIRECT MILITARY MOVEMENTSOrders are given in the office of the Lane Technical High School ofChicago and conducted through a receiving set to the field and there relayedto the officer of the field through means of a megaphone. … ►I w m II 3.C g °~ kH o g CO citL 6 5jh &D M £ 2 ■a <; o o o £ o 5 «H 5 x iv 1 \ 1 ■J! i-**. . i c la W beO -3 c ° Q s? „ §c ■0 d O ; O O Ph^ TS . & +-»& P rcjy c^ £* n C2 o -1 o £ o« MIRACLE OF THE AGE 65 direction of travel in the wire from several thousand toseveral million times…
Radio
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