INDEX. 



351 



SANDSTONE, heat conductivity of, 103 

 Schuster and Gannon, on the mechanical 



equivalent of heat, 127 

 Searle, beat given off by gas, 70 

 Senarmont, heat conductivity of crystals, 



101 



Shellac, heat conductivity of, 103 

 Siemens, measurement of temperature 

 in resistance of platinum wire to 

 electricity, 11 



Silicon, specific heat of, 82, 87 

 Silk, heat conductivity of, 103 

 Silver, melting-point, 12 ; expansion of, 

 by heat, 22 ; specific heat of, 81, 87 ; 

 atomic weight, 87; heat conducti- 

 vity of, 90-99, 100 ; electric conduc- 

 tivity of, 100 ; velocity of light in, 

 100 ; radiation, emissive power of, 

 226, 227 ; radiation reflective power 

 of, 230, 231 ; radiating power of, 239 

 Singing of water, 163, 168 

 Six's thermometer, 13 

 Skin, heat conductivity of, 89 

 Slag-wool, conductivity of, 91, 92 

 Slate, heat conductivity of, 103 

 Sodium, atomic weight, 87 ; specific 

 heat, 87 ; atomic heat, 87 ; spectrum 

 of vapour of, 156 ; spectrum of, 242, 

 243 



Sodium chloride, molecular heat, 87 

 Sodium sulphate, supersaturated solution 



of, 208 



Solar system, energy of, 111 

 Solid-gas change of state, 208 

 Solid-liquid change of state, 208 

 Solids, expansion of, with rise of tem- 

 perature, 17-28 ; linear expansion 

 of, 17, 18 ; Ramsden's method, 18- 

 19 ; method of Bureau International 

 des Poids et Mesures, 19, 20 ; 

 Pouillet's method, 20 ; Lavoisier 

 and Laplace's method, 20-23 ; 

 Fizeau's method, 23-24 ; illustra- 

 tions of linear expansions, 24-28 ; 

 volume expansion of, 28 ; methods 

 of determining specific heat of, 66 

 . et seq. ; heat conductivity of, 90 et 

 seq. ; atoms and molecules of, 131- 

 132 ; and of viscous, 132 ; melting- 

 points of, 199-204 ; latent heat of, 

 204-205 ; evaporation of, 208 ; iso- 

 thermals for, 260 



Solution, 129, 320-332 ; resemblance to 

 fusion, 207, 208 ; vapour pressure 

 of, 320; osmotic pressure, 321, 328- 

 332 ; rise in boiling-point, 321-322 ; 

 lowering of melting-point, 322-327 ; 

 semi-permeable membranes, 327-328 

 Sound energy, 112-113 ; velocity of, 290, 



294, 295 



Specific gravity bottle method of deter- 

 mining the expansion of liquids 

 with heat, 35-36 



Specific heat, 65, 66, 288-290; method 

 of mixtures, 66-71 ; method of cool- 

 ing, 71-72 ; melting ice method, 72- 

 73 ; steam method, 73-76 ; electrical 

 heating method, 76 ; specific heat of 

 water, 76-82; influence of state on, 

 82 ; relation to atomic and mole- 

 cular heats, 83-87 ; of steam, 181- 

 182 ; relation to elasticity, 288-290; 

 ratio of, under constant pressure 

 to that at constant volume, 288- 

 296 



Spectra of gases, liquids and solids, 155, 

 156, 227, 228 



Speculum metal, radiation reflective 

 power of, 231 



Sperm oil, adiabatics of, 287 



Spermaceti, melting-point of, under 

 pressure, 204 



Spheroidal state, 182-188 



States of matter, 157-208 ; change of 

 state, 157 ; liquid-gas change, 158 ; 

 terms "gas" and "vapour," 158- 

 160 ; distillation, 160-163 ; boiling, 

 163-167: stability of bubbles, 167- 

 168 ; condensation on nuclei, 168- 

 172 ; vapour pressures, 172-175 ; 

 vapour density, 174-178 ; latent 

 heat, 178-182 ; spheroidal state, 

 182-184; water-steam change, 184- 

 188 ; critical point, 188-190 ; critical 

 constants, 190-195 ; isothermals, 

 195-196 ; liquefaction of gases, 197- 

 199 ; solid-liquid change, 200-208 ; 

 melting of ice, 200-204 ; of solids. 

 204-207 ; solution, 207 ; sublimation, 

 208 



Steam, latent heat of, used in calori- 

 metry, 74 ; specific heat of, 83, 181, 

 313 ; molecules of, 133 ; latent heat 

 of, 157, 178-182 ; vapour density of, 

 178, 214 ; entropy of, 281 ; volume 

 of saturated, 308 



Steam engine acts by conversion of heat 

 into work, 9, 261 et seq. ; efficiency 

 of, 265 et seq. ; 281-283 



Steam-water change of state, 185-188, 

 306 et seq. 



Steel, expansion of, by heat, 19, 22, 25, 

 26; magnetic energy of, 114; radia- 

 tion reflective power of, 230, 231 ; 

 stress and strain in, 305 



Stefan, heat conductivity of air, 106 ; 

 law of radiation, 248-250, 333 



Stewart, B.,on radiation,227,234,240.241 



Stewart, R. W., heat conductivity of iron 

 and copper, 98, 99 



Stokes, on fall of drops in clouds, 218 



Stracciata. See Bartoli 



Strain energy, 112-113, 117-118 



Strains and stresses, indicator diagrams 

 for, 302-305 



Sublimation, 208 



