Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 458
r-mittent light was focussed upon it through a lens. A distinctmusical note was immediately heard. Other substances, as enu-merated at the outset of my address, were now successively triedin the form of thin disks, in every case with success. On thewhole, we feel warranted in announcing as our… … A perforated disc rotated yields a succession of sounds from light. be that the molecular disturbance produced by light is chiefly asurface action, and that the vibration has to be transmittedthrough the mass of the substance in order to affect the ear. We 400 ALEXANDER GRAHAM BELL have led air,…
Inventions · Inventors
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