Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 454
enium had employed the galvanometer solely; itoccurred to me that the telephone, from itsextreme sensitiveness, might be substituted The Telephonewith advantage. On consideration I saw that Brought in.the experiments could not be conducted in theordinary way with continuous light, for a good… … Telephones receiving sounds through a beam of light. change from a stronger to a weaker state, or, vice versa, that anyaudible effect is produced; this effect is exactly proportional tothe amount of variation in the current. It was, therefore, evidentthat the telephone could only respond to the…
Inventions · Inventors
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