INDEX TO VOLUME III. 



43' 



EDDYSTONE LIGHTHOUSE. 



and modified by Ilopkinson, J., 

 B49. 



lighthouse, Smeaton's, 





t. mechanical, theoretical limits 

 of, 319. 



ston, T., steel definition, Inter- 

 national Committee on, member 

 of, 147. 



Electric arc, fusion of metals in 

 large quantities, available for, 258 ; 

 heat of, 238 ; and incandescent 

 platinum, comparison of luminous 

 rays in, 333 ; transformation of 

 electricity into heat and light in, 

 326. 



Electric battery consuming zinc, 

 and steam engine compared, 137. 



Electric conductivity of wire in 

 ratio of diameter, 418. 



Electric conductor, cost and dimen- 

 sions of, 374 ; electricity, flow of, 

 through, 202 ; heat, how produced 

 in, and dischargeable from, 202 ; 

 hollow tube, proposed by Thom- 

 son, Sir Wm., for, 203 ; signalling 

 through simultaneously in opposite 

 directions, 326 ; size of, Thomson's, 

 Sir Wm., principle regarding. 

 374. 



Electrical Congress, electrical units 

 laid down by, 411 ; England 

 officially represented at, 418. 



Electric current, application of, on 

 large scale possible, 224 ; central 

 motor stations for, 224 ; (division, 

 of, by Edison, announcement of, 

 220 ; of electric lamps, varying 

 resistance of, causes difficulty, 

 220; according to Ohm's law, 

 220 ; regulator, separate, required 

 for each branch, 220 ;) economi- 

 cally produced from natural 

 forces, 137 ; (regulator, 221 ; 

 metallic strip for, 221) ; trans- 

 mission of power by, on what 

 dependent, 202. 



ELECTBIC LIGHT. 



Electric deposition of metals, 331. 



Electric discharge, De la Hue and 

 Muller's, H., experimentH on, 354 ; 

 with high tension battery by 

 Gassiot. :{.")! ; with Jlulimkorff's 

 coils, :>.". I. 



Electric district, area of, 372 ; illus- 

 tration of, 372; working charges 

 of, :t:s. 



Electrical dynamometer, 412 ; de- 

 scription of, 412 ; measures cur- 

 ivnts in Watts, 412. 



Electric energy, conversion of, into 

 mechanical, 404 ; illustrations of, 

 403 ; losses in, 325, 404. 



Electrical Exhibition, International, 

 of Vienna, 415 ; electric apparatus, 

 boat, railway and tramway at, 

 415 ; illumination of, 415 ; mea- 

 suring instruments at, 416 ; re- 

 ports regarding exhibits at, 416 ; 

 Rotunda of, designed by Russell, 

 S., 415 ; scientific commission of, 

 416. 



Electric furnace, 259 ; arc of, auto- 

 matic adjustment of, 259, 260 ; 

 beam of, with weight, 259 ; con- 

 nections of, 259 ; crucible of, 259 ; 

 electrodes of, 259 ; solenoid coil 

 for, 259. 



Electric fusion, material to be fused 

 forming positive pole, 260 ; non- 

 conductive material, operating on, 

 260 ; numerical results of, 260 ; 

 time required to raise tempera- 

 ture in, 260. 



Electric and gas light compared, 238, 

 239. 



Electric hoist, J. Hopkinson's, 404. 



Electric induction, illustration of, 

 31. 



Electrical instruments, illustration 

 of, 32. 



Electric light, 219, 3G7 ; address on, 

 reference to, 414 ; applications of, 

 285, 332 ; benefits of, 333 ; cheap 

 must be concentrated, 224 ; com- 





