Philipp Reis: Inventor of the Telephone: A Biographical Sketch, with Documentary Testimony, Translations of the Original Papers of the Inventor and Contemporary Publications
E. & F.N. Spon, 1883 - 182 pagine
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abrupt acoustic telegraphy apparatus armature auditory nerve auditory ossicles battery Bell's British Patent centimetres closing the circuit cloth coils combination of tones conductors constructed contact-pieces corresponding crown 8vo degree of contact demagnetised described Edison edition Eeis's instruments Eeis's Telephone elastic electric current electric resistance electro-magnet Elisha Gray Engineers exhibited experiments fixed musical Frankfort Frankfort-on-the-Main Friedrichsdorf galvanic current Garnier's Institute Giessen given Graham Bell Gray Herr Hochstift Horkheimer human ear human voice imperfect interruptions interruptor invention inventor iron knitting-needle Legat's Eeport magnet magnetising mechanical membrane memoir ment metal mitter motion needle opening and closing oscillations Philipp Eeis phonautograph Physical Society plates platinum platinum strip principle produced Prof Professor Bottger Prospectus rarefaction Reis Reis's reproduced resistance screw sound sound-waves sounding-board speaking spiral SPON spring steel telegraph tion trans transmit speech transmitter tube tympanum undulations undulatory currents varying vibrations voice wire Yeates