INDEX 



145 



Meyer, n 



Microphone, use of, 14 

 Morse induction, 54 

 Motive power, 64 



N. 



NEGATIVE photographs for 



transmission, 102 

 Nernst lamp, 24, 33, 68, 120 



o. 



O'MEARA, Major, 49 

 Oscillograph, Blondel, 119 

 Oscillographic records, in 



P. 



PAPER, conductive, 98 



Perry, Prof., 4 



Photographs, half-tone, 99, 101 



single line, 103 

 Polarisation receiver, 17 

 Postal strike in Paris. 73 

 Pupin, 113 



R. 



RECEIVING apparatus, Korn's 

 telautograph, 67 



Regulating resistance on re- 

 ceiver, 68 



Regulator of Thorne-Baker 

 telectrograph, 94 



Relay, polarised, 44 



Relief photographs, 



transmit 

 ting, 9 

 used by 

 Belin, 116 



Retouching, 58 

 Reversing gear, 70 



P.T. 



Rheostat, Belin's, 118 

 Ruhmer, Dr., 32, 60 



s. 



SANGER-SHEPHERD, 65, 72, 89 

 Scale of tints, 'Belin's, 120 

 Selenium, 4, 22, 24 



colour sensitiveness 



of, 32 



inertia of, 26 

 Korn's compensation 



for inertia, 26 

 Sharman, 16 

 Shunt resistance, 36 



circuit on line, 93 

 Siemens and Halske relay, 44 

 Snapshots, telegraphy of, 61 

 Sodium sulphate cells, 66 

 Standard cable, 112 

 Stylus, construction of, 65 

 iridium, 65, 92 

 sparking at, 66 

 Submarine cable, 113 

 Switchboard, 45 

 Synchronising of apparatus, 36, 

 39- 89, 98 



T. 



TANDY, Mr. F., 49 

 Telautograph, Korn's, 61 



principles of, 63 

 receiving on pho- 

 tographic 

 paper, 78 

 Telectrograph, receiver, 93 



as recorder, 114 

 Telegraphy, duplex system, use 



of, 107 

 Telestereograph, Belin's, 116 



