INDEX TO VOLUME II. 



453 



CABLES. 



mi sra drjith, 186 ; strain on 

 dynamometer in, gives indication 

 of sea depth, 186); picking up 

 machinery, 114, 115 ; recovering 

 of, advantage of combined paying 

 out and picking up machine, 

 140 ; rusting of iron sheathing of, 

 ! is ; safest, transmitting without 

 failure greatest number of, words 

 with least battery power, 108 ; 

 short, derivation of Siemens, \V., 

 formula for resistance of, '>_ ; 

 (_>'/> ///r*'ji, C. IF., design of, insu- 

 lated with india-rubber and gutta- 

 percha, 107 ; life, probable of, 

 108 ; outer sheathing of strip 

 copper of, 107 ; spiral covering of 

 tar-saturated hemp, 107 ; no 

 tendency to untwist, 108) ; smooth, 

 importance of, 113 ; strain on, 

 importance of measuring, 115 ; 

 strength, greatest of, covered with 

 pitch and yarn and sheathed with 

 iron wire, 70 ; during submersion 

 should be carefully tested, 58 ; 

 testing of in sections, diagrams 

 of, 94 ; testing of under water 

 before submersion, 76 ; unsup- 

 ported throughout length, 119 ; 

 water-tight tanks for, on board 

 ship, importance of, 81, 185 ; wire 

 sheathed, untwisting of, 106, 107 ; 

 should work with low battery 

 power, 75. See Submarine electric 

 telegraph cable. 



Cables, improved construction of, 

 necessity for, 82 ; existing previous 

 electrical condition of unknown, 

 61. 



Candia and Chios cable destroyed by 

 insects in six months, 117. 



Carbon disks used in electrical 

 current regulator, 204. 



Carbon, foreign matter in, causes 

 flickering, 190. 



Carbon, homogeneous, producible 

 with care, 190. 



COHEN, PROFESSOR. 



Central light, more economical than 

 divided, 247 ; or divided light, 

 246, 247. 



Champain, Major B., telegraph 

 routes between England and 

 India, discussion of paper by, 

 193195. 



Channel Islands cable, electrical 

 condition of, 75 ; route of, criticism 

 of, 75. 



Charge, discharge and loss per 

 minute, diagrams of, 95. 



Charge and distribution along wire, 

 derivation of formula for, 63, 64. 



Chatterton's mixture, 48, 65. 



Chemical electrical telegraph of 

 Davy, E., Morse, Bain and Bake- 

 well, 18. 



Chemical recording instruments of 

 Bain and Bakewell, reference to, 

 23. 



Chlorophyll produced by electric 

 light, 235. 



Chlorophyll, starch and woody fibre 

 produced by solar ray through 

 decomposition of C0 2 by leaves of 

 plants, 227. 



Clark, L., double needle instrument, 

 on use of in England, 41 ; on elec- 

 tro-magnetism and Oersted, 44 ; 

 exhibited induction phenomena in 

 1854, 40 ; Morse instrument, on 

 use of, 41 ; telegraph arrange- 

 ments of, reference to, 23. 



Clarke's improved electro-magnetic 

 machine, 199. 



Clausius found resistance of metals 

 to be directly proportionate to 

 absolute temperature, 146. 



Clear and coloured glass between 

 electric light and plants, effect of, 

 255. 



Codes, Highton, E., on, 42. 



Coefficient of increase of resistance 

 of platinum with temperature, 143. 



Cohen, Professor, on plant growth 

 taking place at night, 240. 



