FUTURE PROSPECTS ig 



parts of the various instruments have been made 

 with greater precision, the physical theory of the 

 selenium cell has been exhaustively worked out by 

 Korn, who has also made a great deal of progress 

 in determining the best form of string for the 

 galvanometers used in photographic receivers. M. 

 Chatenet, of L' Illustration, Paris, has done much 

 valuable work in connection with the preparation 

 of the line photographs for transmission, the 

 importance of which will be seen later. 

 History does not dip into the future, fortunately 

 for the historian, but it is quite clear by now that 

 the telegraphy of photographs has a commercial 

 value, and that this value will rapidly increase with 

 the demands for pictures made on modern journa- 

 lism. What other uses it will be put to remain to 

 be seen, but there are many possibilities. As 

 regards distance, where the cable renders trans- 

 mission too slow, "wireless" may solve the 

 problem, but that also remains to be seen. 



Before closing this chapter, I should like to refer 

 once more to Mr. Gamble's article in Penrose's Pic- 

 torial Annual, which it is interesting to recall to- 

 day, since his predictions have been so well ful- 

 filled. 



" But suppose," he says, speaking of illustrated 

 journalism, " it were possible to transmit the picture 

 over the wires with the same facility as we now 

 transmit the words, and suppose that the same 



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