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 250
n figure 3. In figure 2 this amplitude is shown by thecloseness of one line to another. If the amplitude wasgreater, there would be more lines packed in a givenspace. There is one other thing about a wave that we shouldobserve. In the water wave we see that part of the waterin the wave is above the… … and the other part of the wave disturbance is on the op-posite side of the usual (waveless) condition. This istrue of the radio waves. Look at figure 2 and note thatthe arrows show that the electrostatic lines of force aredirected upward in one part of the wave and downwardin another part. This is…
Radio
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