Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 390
w P«o 2 1 (a) Ped. puton damper pedal; •& take off pedal. (b) Expression Line. (c) Metrosfyie fine. (d) Expression Marks. (e) ffoll Perforations. 1,2,3, etc., ftemeorphrasenumbers correspondingto numbers on music. First notes of the Traumerei on a Pianola roll. AUTOMATIC TELEPHONY 335 pass into… … Mechanism of Pianola. . Much self-acting machinery employs electricity. By virtue ofthis wonderful agent the Automatic Electric Company of Chicagoinstals telephonic systems which enable a sub- Automatic scriber to connect himself directly with any Telephones,other subscriber, without the…
Inventions · Inventors
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