THE TELEPHONOGRAPH. 311 



stantl}' hoino- siippliod with tlio latest news of the day, stock ([uotations, 

 etc. After the i-ihhon or band has passed Ix'fore these iiia*>nets the 

 obliterating;' magnet wipes out all of the niauiietie lines of force stored 

 up in the steel band, and it then passes on to receive fresh impressions 

 from the recording- magnet and telephone. In this connection I wish 

 to say that in Budapest I recently- found a talking newspaper S3"stem 

 being run in connection with the supplying of music, and talking from 

 the theatres b}' means of the " tlieatrophone." During the day the 

 subscribers were constantly- being informed of the latest news of 

 importance. This service, which supplied many thousands of sub- 

 scribers, was independent of the regular telephone service. I also 

 remember equipping the Theatrophone Company in Paris in 1889 with 

 two Edison phonographs for a like purpose — this being the first 

 attempt in this direction. Many suggestions have recently been made 

 for employing the telephonograph in telegraphic and telephonic work, 

 just as were made many years ago when Edison invented his phono- 

 graph. It remains to be seen how important the practical applications 

 of this wonderful scientific instrument will become, but it is .self- 

 evident that any invention possessing such intrinsic merit is certain 

 sooner or later to meet with important commercial applications. The 

 author, in common with many others, has used the phonograph in his 

 office; dictating at his convenience his correspondence upon the cylin- 

 ders, from which it was later transcribed by the typewriter. He was 

 recently shown and operated a foi-m of Poulsen's telephonograph, 

 which had three magnets attached to the recording magnet carrier, 

 which enabled him to start, stop, and reverse the movement of the 

 carrier, and also obliterate errors in the wire. In tig. 5, letters B 

 and E, are shown two methods proposed for duplexing. The two sets 

 of magnets are shown connected, in the one case, in parallel; and in 

 the other, in series. These magnets may all be connected in series 

 or all in nudtiple, ])ut it is essential that they should be with the proper 

 polar relation. It is claimed that these two sets of recording magnets 

 send waves of a different character over the line, and at the receiving 

 end of the circuit each reproducing magnet will respond to its proper 

 wave. 1 believe the form shown in tig. 5, letter E, has never been 

 demonstrated to be practicable, but the one employing the two rib- 

 bons shown in tig. 5, letter B, has been operated successfully. Sug- 

 gestions have been made for using the telephonograph as a telephonic 

 relay, and I am informed that some experiments have l)een made 

 recently in this direction in Europe, and it may perhaps not be out 

 of place, in this connection, to call attention to the experiments made 

 by the author in employing the phonograph as a telephonic relay at 

 the time of his lecture on Edison and His Inventions, delivered before 

 the Franklin Institute on Fel)ruary 4, 1889, which experiments were 

 described in the Electrical World of February 16, 18.sit, and other 



