INDEX. 



345 



Conversion of thermometric scales, 5 

 Copper, expansion of, by heat, 17, 22 ; 

 specific heat of, 81, 87; atomic 

 weight, 87 ; atomic heat, 87 ; heat 

 conductivity of, 89, 90, 96, 98, 99, 

 100 ; electric conductivity of, 100 ; 

 velocity of light in, 100 ; emissive 

 power of, 226, 227, 255 

 Cork, heat conductivity of, 103 

 Coronas, 217 

 Correlation of different forms of energy, 



116 



Corresponding pressures, 196 

 Corresponding temperatures, 195 

 Corresponding volumes, 196 

 Cotton, .heat conductivity of, 91, 103 

 Coulier, as to condensation on nuclei, 168 

 Critical constants, 190-195 

 Critical points, 188-195, 199 

 Critical pressure, 190-192, 199 

 Critical volume, 191, 192 

 Crookes, on radiometer, 149, 150 

 Crova, on solar radiation, 254, 256 

 Crystals, heat conductivity of, 101 

 Cubical dilatation. See Volume-Ex- 

 pansion 

 Cyclones, method of forecasting, 57-60 



DALTON, volume expansion of e:ases 

 with heat under constant pressure, 

 42 ; atomic hypothesis used by, 129 



Dark lines in solar spectrum, 243 



D'Arsonval, radiomicrometer, 221 



Davy, Sir H., on heat energy, 111-112 



Davy lamp, 92 



Day, W. S., on specific heat of water, 

 77 ; on the mechanical equivalent of 

 heat, 124, 125 



De la Provostaye and Desains, on radia- 

 tion, 226, 227, 229-231 



Defant, on raindrops, 218 



Delayed boiling, 165 



Desormes. See Clement 



Despretz, method of measuring heat 

 conductivity, 96, 97, 103, 104 



De Vries, on osmosis, 327-328 



Dew, 218-219 ; formation of, 233 



Dewar, on liquefaction of gases, 197-198, 

 199 ; on melting-point of ice under 

 pressure, 204 



Dew point, measurement of, 209-215, 219 



Diamond, specific heat of, 81, 82 



Dieterici, on latent heat of steam, 180 



Diffusion of matter, 129 ; of gases, 134, 

 142 ct seq. ; of radiation, 231 



Diffusivity of heat, 94 



Dilatometer, use of, in measuring ex- 

 pansion of liquids with heat, 36-37 



Dines, hygrometer of, 210-211 



Dissipation of energy, 278 



Distillation, 161-163 



Doppler's principle applied to radiation, 

 338 



Drops, formation of, 165 ; vapour pres- 

 sure of, 316, 317 



Dulong and Petit's experiments on ex- 

 pansion of mercury with heat, 30-31 ; 

 law of heat capacity, 86 ; law of 

 radiation, 246-248 



Dumas, method of deter mining vapour 

 density, 176-177 



Dust, deposit of, on relatively cold 

 bodies, 152 ; in air, 169, 170 



Dust-counter, 169 



Dust-free region about hot bodies, 152 



Dutrochet, on osmosis, 327 



EBONITE, heat conductivity of, 103; 

 transparent to long wave radiations, 

 234 



Effusion of gases, 140 et seq. 



Eider-down, heat conductivity of, 103 



Elasticity, relation of specific heat to, 

 288-290 



Electric arc, temperature of, 12 



Electric currents used to measure tem- 

 peratures, 11, 12 



Electrical energy, 113, 114, 118, 129; 

 analogies with entropy, 276-277 



Ellicott's pendulum, 26 



Emissivity of heat, 94, 226 et seq. 



Energy, radiant, 88, 220-236 ; conserva- 

 tion of, 108 et seq. ; various forms of, 

 108, 109 ; kinetic, 109 ; potential, 

 110; heat, 111; strain, 112; sound, 

 112; light, 113; electrical, 113; 

 magnetic, 114 ; chemical, 114 ; 

 identity of, 116 ; ratio between 

 mechanical, and heat, 118 et seq. ; 

 relation of, to physical state, 157 ; 

 to temperature, 162 ; balance of, in 

 an enclosure, 237-240 ; loss of solar, 

 257 ; dissipation of, 278 ; intrinsic, 

 278, 279 ; available, 279-281 ; stream 

 of, from a full radiator, 334, 335 ; 

 change of, in adiabatic expansion, 

 340-341 ; distribution of, in spec- 

 trum, 341-342 



Entropy, 268, 272 ; definition of, 274 ; 

 gain of, 274-275 ; entropy-tempera- 

 ture diagrams, 275-276, 280 et seq. ; 

 quantities analogous to, 276-277 ; 

 tendency of, to increase, 277-278, 338 



Ether, vapour tension of, 159, 160 ; boil- 

 ing-point of, 175 ; specific heat of. 

 182, 314 ; critical constants of, 193, 

 195 ; corresponding pressure and 

 volume of, 196 



Evaporation, 157, 158 



Exchanges, theory of, 237-243 ; uniform 

 temperature enclosures, 238-240 ; 

 effect of the medium on radiation, 

 240-242 ; bodies exchanging radia- 

 tions, 24'2 ; application of princi- 

 ples, 242-243 



Expansion of gases by heal, 3, 41-52 



