THE TELEPHONE: An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in its Action. With Directions for Making a Speaking Telephone

Dolbear, Amos Emerson (1837-1910)

Verlag: Lee & Shepard, Publishers, Boston, 1877

Beschreibung

128 p. 17 textual figures. "As the speaking-telephone, in which magneto-electric currents were utilized for the transmission of speech and other kinds of sounds, was invented by me, I have described at some length my first instrument, and have also given explicit directions for making a speaking-telephone which I know, by trial, to be as efficient as any hitherto made" (from the Preface). The patent for the first telephone was granted to Alexander Graham Bell in 1876, despite the fact that Dolbear had invented the first telephone receiver with a permanent magnet as early as 1865. From the library of writer Walter Merriam Pratt, with his bookplate to the front pastedown. 12mo. Original brown cloth binding, with black stamping. The spine is darkened a bit, with minor wear to the corners and tips; else very good. Bestandsnummer des Verkäufers 64050

Bibliografische Details

Titel: THE TELEPHONE: An Account of the Phenomena ...

Verlag: Lee & Shepard, Publishers, Boston

Erscheinungsdatum: 1877

Einband: Hardcover

Zustand: Very Good

Auflage: First edition.