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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 305

An illustration from 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, leaf 305
cessivepulses produce the note heard. Another method is by the use of the tikker. The circuitis shown in figure 28-B. The condenser, C, shunting the 278 RADIOTELEPHONY telephone receiver has a very large capacity compared tothe variable condenser at C. The tikker is a specially de-signed… … A F1&.2&. -L

Radio

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