INDEX 



A. 



ADJUSTMENTS of telectrograph, 



94 

 Advantages of photo-telegraphy, 



75 



Alphabet system of transmis- 

 sion, 2 



Amstutz, 4, 8 



Aperture, triangular of receiver, 



37 



Artificial line, 105 

 Attenuation constant, 113 

 Ayrton, 105 



B. 



BAIN'S, chemical telegraph, 20 

 Bakewell, 2, 88 

 Balancing of line, 92, 96 

 Baudot induction, 54 

 Belin, M. Edouard, 116 

 Belin's transmitter, 117 



for line drawings, 125 

 s with microphone, 122 

 Berjeanneau, 14 

 Berlin, experiments with, 48 

 Bernochi, wireless apparatus, 14 

 Bidwell, Shelford, 4 

 Blondel, 119 



c, 



CAPACITY, effects of, 95, 96, 108. 



H3 

 wire to earth, 113 



Carpentier, M. J., 49 



Caselli, 12 



Caselli's pan-telegraph, 10 



stylus, 89 



transmitter, 61 

 Charbonelle, 12, 14 

 Chatenet, 19, 49, 76 

 Chemical receiving paper, 96 

 Condenser, in line balancer, 101 

 Contrast in pictures, 51 

 Counterbalancing line effects, 99 

 Criminalistic possibilities, 59 



D. 



Daily Mirror, 12, 18, 49, 56, 74 

 Damped oscillations, 83 

 Damping factor, 119 



of galvanometer 



strings, 69, 85 

 Direct engraving by telegraphy, 



8,9 

 Distortion of image, 95 



counteraction of, 95 

 Duddell, 82 

 Duplex working of telautograph, 



79 



E. 



EARTH " return," 74 

 Einthoverf galvanometer, 36, 61, 

 64, 82 



