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 146
cting negative electricity into the points. Youknow that electricity is repelled from points, hence thisnegative electricity is thrown off from the points of thecombs to the plate and there it neutralizes the positiveelectricity under the points themselves. The continuedrotation of the plate brings… … Copyright, Underwood & Underwood, N. Y.HENRY FORD PUTS ON THE RADIO PHONE RECEIVERSHenry Ford dropped into an Atlanta (Ga.) newspaper office andlistened in on the radio phone receiving set installed by the newspaper.
Radio
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
