INDEX TO VOLUME 111. 



COAL. 



ical energy, relation between, 105, 

 184 ; on molecular theory of gases, 

 299. 



Coal, analysis of, 244 ; calorific power 

 of, 191,245 ; carriage of, difficulty 

 of, 269 ; combination of, with 

 oxygen, 86; Commissioners' report, 

 188 ; (07Mtt?H/^/o per horse-power 

 per hour, 343 ; method of reduc- 

 ing, 81 ; present rate of, 101, 188) ; 

 (ilepoxits, only fuel below earth's 

 surface, 87, 187 ; of United States 

 very extensive, 233) ; derived 

 from solar energy of former ages, 

 91 ; distillation of, result of, 244 ; 

 fire, loss of heat by distillation 

 within, 244 ; see Fuel ; gases in, 

 condition of, 244 ; getting by me- 

 chanical process, 82 ; heat units 

 developed in combustion of, 81 ; 

 performs Jth theoretical work in 

 steam engine, ^th in iron heating, 

 63 ; produced from former solar 

 rays, 188 ; production, annual, of 

 Great Britain, 81 ; question, 100 ; 

 saving appliances, 82 ; Select Com- 

 mittee on, 100, 101 ; tar, former 

 and present value of, and of secon- 

 dary products of, 336, 337 ; waste 

 of, as smoke, 364 ; and zinc, energy 

 of, 392. 



Coil, induction, new way of exciting, 

 356. 



Coil, tested under pressure, 41. 



Coke, coal turned into, for high tem- 

 perature effects, 244 ; as domestic 

 fuel, objections to, 247 ; and gas 

 in combustion on fire place, 247 ; 

 and gas as heating agents com- 

 pared, 251 ; oven, loss of volatile 

 constituents in, 245. 



Colladon, Prof., dynamo metrical 

 apparatus of, 120. 



Combined retort and grate gas pro- 

 ducer, difficulty with, 291, 292. 



Combustible, first effect of, 244. 



Combustion, Bunsen on, reference 



CONSTRUCTIVE AST. 



to, 332; flamelesa, 86; heated 

 products of, loss of effect by, 192 ; 

 perfect, should prevent fogs, 250 ; 

 Ste. Claire Deville on, reference 

 to, 332. 



Comets, Dewaron, reference to, 301 ; 

 explanation of, 308 ; gases of, 310 ; 

 Huggins, W., on, reference to, 301 ; 

 Liveing, on, reference to, 301 ; 

 luminosity of, to what due, 310 ; 

 and meteorites, similar gases oc- 

 cluded in, 301 ; nucleus of, of what 

 consisting, 310 ; phenomena of, 

 explanation of, 309 ; velocity of, 

 310. 



Commercial crisis, use of, 128. 



Compass errors, Airy, Sir G., on, 

 346. 



Compass, Thomson's, Sir Wm., 346. 



Competition set in between nations, 

 233. 



Compound gases in space dissociated 

 and drawn into sun as fuel, hypo- 

 thesis of, 357. 



Compound marine engines, consump- 

 tion of fuel per horse-power per 

 hour in, 95. 



Compton, cotton spinning developed 

 by, 231. 



Condensing steam engine, losses in, 

 341 ; utilises only ^th of heat 

 energy in coal, 289. 



Conductivity of conductor affects 

 rate of speaking through cable, 

 41 ; of copper, varies between 

 wide limits, 9, 40 ; of metals, 

 table of, 9 ; in ratio of diameter, 

 418. 



Conductor, temperature effect on, 34. 



Conical pendulum, 119. 



Conservation of solar energy, 293, 

 357. 



Conservatoire des Arts et Metiers, 

 212, 215 ; under direction of Gen. 

 Morin and M. Tresca, 212, 215. 



Constructive art, steel will cause 

 revolution in, 60. 



