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A Remarkable Experiment in Phonographic and Telephonic Transmission between New York and Philadelphia. This experiment was shown by Mr. Will- iam J. Hammer in his lecture upon 44 Edi- son and his Inventions,” delivered !>efore the Franklin Institute, February 4, 1SS9. It employed two Edison phonographs, two Edison carlxrn telephones (transmitters), two Edison motograph receivers or loud speaking telephones, two induction coils, two sets of batteries and -pne hundred and three miles of long-dista wire, six miles of which was and underwater cable. It will be observed that th£ sounds, which consisted of talking, singing and cornet playing, were transmitted through the air five times, and were transmitted through no less than thirteen mediums from the speaker and musician in New York to the audience in Philadelphia. These mediums included vocal chords, cornet, air, glass, iron and mica diaphragms, carlion buttons, stylus of steel, palladium- faced peris, hydrogen gas (evolved between pen and surface of chalk), wax and chalk cylinders and copper wire. The physical conditions of the sound- waves were changed no less than twenty- one times in transmission, as follows: (1) Air waves produced by vibration of vocal chords in speakers throat or by the cornet (2) Vibrations of a diaphragm. (3) Un- dulations in wax. (4) Vibrations of a dia- phragm. (5) Varying pressures in a carbon button. (6) A pulsating electric current. (7) An undulating magnetic*fqrce. (8) Al- ternating electric currents. (9) a varying force of adhesion. (10) Vibrations of a diaphragm. (11) Sound-waves. (12) Vi- brations of a diaphragm. (13) Undulations in wax. (14) Vibrations of a diaphragm. (15) Varying pressures in a carbon button. (16) A pulsating electric current (17) An undulating magnetic force. (iS) Alter- nating electric currents. (19) A varying force of adhesion. (20) Vibrations of a diaphragm. (21) Sound-waves translated into words by the auditory nerves of the hearers. The experiment shows three of Mr. Edi- son’s remarkable inventions working in juxtaposition; /*. e. his carbon transmitter, his motograph receiver and his phonograph. It is also interesting to note that at the time of the abovo-mentioned lecture, that by means of transmitters placed upon the stage, the lecture was listened to by people in some fourteen different places. Music and talking were transmitted by the Phono- graph over the telephone to Buffalo, Roches- ter, Boston, Syracuse, New York, Orange and elsewhere, from the Franklin Institute stage, through the courtesy of the Long Distance Telephone Company, of New York, who kindly placed their lines at Mr. Hammer's disposal for these original ex- periments. ru:e telephone under-ground