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 176
sufficient length tomake the distance between the insulators E. and G. about75 feet. MIRACLE OF THE AGE 153 C. is a single block pulley thai may be used if readilyavailable. The insulators E. and G. may be constructed of anyhard wood strong enough to withstand the strain of theantenna. Blocks of… … Porcelain wiring cleats may be used instead of the wood,if they are available, but if unglazed porcelain is used itshould be boiled in paraffin the same as wood. The antenna is indicated by the letter F. suspendedfrom or between the insulators E. and G. Either insu-lated or bare copper wire No. 14…
Radio
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