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 178
down to-ward the outside of the building. This is done to keepthe rain from following the tube through the wall to theinterior. Fig. 2 shows the radio receiving set installed in somepart of the house. MIRACLE OF THE AGE 155 P is the receiving set which is described in detail below. N is the wire… … flexible. A piece of ordinary lamp cord might be un-braided and serve for these two leads. Q is a piece of flexible wire leading from the receivingset binding post marked ground to a water pipe, heat-ing system or some other metallic conductor to ground,except M, Fig. 1. If there are no water pipes…
Radio
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