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
A popular 1922 American account of wireless telegraph and telephone, written by Frederick E. Drinker and James G. Lewis and printed in Philadelphia for general readers and amateur set-builders. The plates mix hand-drawn circuit schematics — aerials, tuning coils, condensers, vacuum tubes — with plotted current curves and small perspective sketches of benchtop apparatus, offering designers spare black line work on toned paper.
