THE TELEPHONE: An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in its Action. With Directions for Making a Speaking Telephone
Boston: Lee & Shepard, Publishers, 1877. First edition. Hardcover. 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..... More