Index of Subjects 



351 



Subsidiary temperatures, definition of, 188 

 ,, ,, calculation of, 210 



,, mechanical illustra- 



tions, 190, 192 



Super-cooled vapour, 132 



Super-heated liquid, 132 



Temperature, definition of, 108 



equalisation of, 5, 109, 166 



thermodynamic scale of, 165 



principal and subsidiary, 188 



(see also Subsidiary tempera- 

 tures) 



gradient in atmosphere, 312 



Thermodynamics, 162 

 Thermometry (gas), 138 

 Transfer of energy by collisions, 197 



,, of energy by molecular motion, 301 

 general equations of, 276, 280, 301 

 Transition from liquid to gaseous states, 114, 

 131, 329 



Vacuum-tube, free path in, 8 



light emitted by, 209 



Van der Waals' equation, 115, 136, 148 



,, ,, treatment of cohesion, 117, 



124, 332 



Vapour, 3, 131, 329 

 Velocity of molecules, numerical values, 113 



,, of sound, 307 

 Vibrational energy of molecule, 172, 337 



,, ,, rate of increase caused by 



collisions, 197 

 Virial, 143 

 Viscosity, 29, 242, 295 ; experimental values, 



251 

 variation with density, 252, 334 ; 



with temperature, 254, 275 

 Volume-coefficient of a gas, 139 



Wave-length of light, correlation with velocity 

 of molecule, 207 



INDEX OF NAMES. 



Andrews, 133 



Barus, 256 



Bernoulli, Daniel, 10 



Berthelot, 142 



Boltzmann, 10, 11, 51, 110, 115, 168, 246, 249, 



275, 335 



Bryan, 84, 110, 168, 314, 325 

 Burbury, 10, 12, 52, 104 

 Burnside, 104 



CaiUetet, 341 



Callendar, 140 



Capstick, 220, 221, 224, 225 



Clausius, 10, 132, 143 



Conrau, 265 



Dalton, 108, 310 

 Democritus, 9 

 Dewar, 312, 315, 341 

 Dulong, 220, 221 



Epicurus, 9 

 Frankland, 311 



Gassendi, 9 



Gibbs, J. Willard, 167, 168, 335 



Graetz, 267 



Graham, 252 



Hemsalech, 207 

 Herapath, 10 

 Holman, 256 

 Hooke, 10 



Johnstone Stoney, 325 

 Joule, 10, 64 



Kaysir, 220 



Kelvin, Lord, 6, 64, 166, 274 



Kirchhoff, 10, 52, 275 



Knietsch, 341 



Koch, 340 



Kronig, 10 



Kundt, 221, 252 



Larmor. 168 

 Lasswltz, 9 

 Leduc 220, 227 

 Leucippus, 9 



