INDEX
Aberration, [139]
Accuracy of working, [70], [72]
Acetylene gas lamps, [120]
Actinic power, [102]
Actinograph, [105]
Actinometer, [120]
Alternating current, [82], [100]
Ammonia, [123]
Aniline dye, [123]
Ballasting resistance, [100]
Belin, [47]
Berzelius, [109]
Bichromate of potash, [120]
Blondel's oscillograph, [47]
Camera obscura, [136]
choice of, [117]
Capacity of condenser, [24], [78]
of cable, [3]
of London-Paris telephone line, [3]
Carbon bisulphide, [53]
Charbonelle, [48]
receiver of, [48]
Chemical solution, [56]
Circuit breaker, [76]
Clutch, details of, [88], [89], [91]
spring, [71]
Coating the metal sheets, [120]
Collecting rings, [91]
Commercial value of photo-telegraphy, [1]
Compensating selenium cell, [112]
Contact breaker, [37]
Copying arrangements, [118], [125]
Cross screen, [21]
De' Arsonval galvanometer, [47], [73]
Decoherer, [41]
Design of machines, [21]
Detectors, [83]
Developing solutions, [105], [122]
Diaphragm, movement of, [48], [52], [84], [87]
Distance of transmission, [33]
Duration of wave-trains, [22], [25]
Early experiments, [2]
Einthoven galvanometer, [32], [44], [45], [54], [113]
Electric clock, [93]
Electrolytic receiver, [4], [37], [54], [61], [64]
Enlarging arrangements, [124], [125]
Experimental machine, [20]
Extraneous light, [47]
Fastening electrolytic paper, [58]
Fatigue of selenium cell, [64], [114]
Fish glue, [120]
Flexible couplings, [77]
Frequency meter, [65]
Friction brake, [88]
High speed telegraphy, [70]
Hughes governor, [65]
Hughes printing telegraph, [63]
Hurter and Driffield, [104]
Hydrogen, [100]
Incidence, angle of, [127]
effects in photo-telegraphy, [110]
method of counteracting, [103], [112], [113]
effect of wave-length of light on, [114]
Intensifying solution, [122]
Isochronism, [64], [69], [70], [71]
Kathode rays, [53]
Knudsen, [2]
apparatus of, [9]
Korn, [30], [33], [45], [65], [72]
apparatus of, [31]
Lamps, coloured, [94]
principal focus of, [130]
conjugate foci of, [131]
action of, [129]
aperture, [138]
meniscus, [139]
Light, diffusion of, [86]
extraneous, [87]
Limit of error in synchronising, [64]
Line balancer, [3]
Line screens, [9], [15], [16], [116]
making, [116]
Magnifying power, [136], [137]
coherer, [40]
Mechanical inertia, [33]
Mercury break, [81]
churning of, [82]
containers, [82]
Mercury jet interrupter, [29]
Metal prints, [15], [18], [32], [59], [64], [95], [120], [124]
exposure of, [121]
size of, [22], [24], [75], [77]
pressing the, [22]
Military uses, [35]
Mirror galvanometer, [9], [42], [73]
Morse code, [35]
clockwork, [63]
electric, [63]
Nernst lamps, [43], [85], [98]
heater of, [99]
filament of, [99]
principle of, [98]
resistance of, [100]
overrunning, [101]
Nicol prism, [53]
Paper for electrolytic receiver, [56]
Parabolic reflector, [8]
Period of galvanometer, [43], [44], [46]
Photographic Daily Companion, [105]
Photographic films, [40], [43], [45], [53], [54], [62], [85], [86], [98]
process, [37]
chemical inertia, [103]
plates, orthochromatic, [59]
plates, [120]
Points to be observed in preparing metal prints, [123]
arc, [31]
Preparing selenium, [109]
photographs for transmitting, [15], [115]
sketches on metal foil, [124]
Prism, [128]
action of, [129]
Process plates, [122]
Professor Nernst, [98]
Radio-photography, requirements of, [74]
Refraction, angle of, [127]
Refractive power, [127]
Relay, [25], [39], [49], [53], [55], [60], [75]
differential, [79]
polarised, [97]
Reproducing for newspapers, [60]
Resistance of selenium, [109]
of selenium cells, [110]
regulating, [113]
Retardation of current, [6]
Retouching, [62]
Rotary spark-gap, [28]
Selenium, [99]
cells, [8], [34], [55], [60], [64], [109], [110]
machines, [45]
Sensitiveness of selenium cells, [113]
ratio of, [113]
Silvered quartz threads, [44], [46]
Spark-gap, [27]
Speed regulator, [68]
adjustments of, [69]
Spring clutch, [71]
Starting position of machines, [98]
String galvanometer, [32]
Stylus, [17], [18], [57], [61], [78], [95], [103]
sparking at, [24]
defects of, [57]
Submarine cable, [4]
Synchronism, [11], [20], [36], [64], [69], [71]
Telephograph, [74]
advantages of, [76]
method of working, [96]
Telephone receiver, [83], [85]
diaphragm, [48]
improved, [51]
Telephone relay, [48], [50], [52], [83], [85], [97]
Thermodetector, [32]
Tow, [88]
Transmission, distance of, [35], [72]
Vibration, natural period of, [39]
Watkins, [105]
power number, [105]
Waves, damped, [30]
Wheatstone bridge, [113]
Wireless apparatus, [13]
Wireless World, [31]
Wynne, [105]
Zirconia, [99]
THE END
Printed by R. & R. Clark, Limited, Edinburgh.