INDEX 



ABSOLUTE scale of temperature, 10, 12, 

 266 et seq., 294-295, 299-302; effi- 

 ciency, 267 ; comparison with air- 

 thermometer scale, 269 



Absorptive powers of surfaces, 228 



Actinometer, 253 



Adiabatic change, temperature change 

 in, 285 ; expansion of radiation en- 

 closure, 338-341 ; gas equation, 295 



AdiaLatics on indicator diagram, 261 ; 

 steeper than isothermals, 287 



Air, expansion of, by heat, 3; ther- 

 mometric use of, 10 ; expansion with 

 rise of temperature under constant 

 pressure, 42 ; coefficient of pressure 

 increase with constant volume, 46- 

 48 ; specific heat of, 83, 84, 85, 118- 

 120 ; convection of, 91 ; heat con- 

 ductivity of, 90-92, 106, 107 ; effusion 

 of, 141; viscosity of, 146, 147; 

 mean free path of, 147 ; collision 

 frequency, 147 ; effect of, on evapo- 

 ration, 162, 163; dust particles in, 

 168-172 ; isothermals of, 190, 191 ; 

 transparency to radiations, 235 ; 

 value of specific heat ratio for, 289- 

 296 ; intrinsic energy of, 296 et seq. 



Air-pressure, relation of, to melting- 

 point of ice, and boiling-point of 

 water, 5, 6 



Air-thermometer by Regnault, 48-49; 

 Gallendar, 50, 51,52; Bottomley, 50, 

 scale, 269, 294-295, 299-302 



Aitken, on boiling, 165 ; on dust as a 

 condensing agent, 168-170 ; dust 

 counter, 169 ; on dew, 219, 233 



Alcohol (ethyl), used for thermometers, 

 9 ; boiling-point, 12, 175 ; specific 

 heat of, 80-81, 182; heat conduc- 

 tivity of, 106 ; vapour tension of, 

 159 ; expansion of, under a pull, 

 187 ; critical constants of, 193 ; 

 osmosis of, 327 ; (methyl), heat con- 

 ductivity of, 106 



Aluminium, specific heat of, 81, 87 ; 

 atomic weight, 76 ; atomic heat, 87 



Amagat, on the volume-pressure relation 

 in air, 298 



Amaury. See Jamin 



Ammonia, specific heat of, 85 ; radia- 

 tions, absorbed by, 235 



Andrews, on the isotbermals and critical 

 point of carbon dioxide, 188-190 



Angstrom, method of measuring heat 

 conductivities, 98 ; result for copper, 

 99 



Aniline, boiling-point, 12 ; specific heat 

 of, 80 



Anticyclone over cyclone, 58 



Argon, value of specific heat ratio for, 

 138 ; motion of molecules in, 139 ; 

 critical pressure of, 199 ; critical 

 temperature, 199 ; boiling-point, 199 



Atmosphere, water in the, 209-219 ; de- 

 crease of temperature with height 

 in the, 296 



Atomic heat, 83, 84, 87, 130 



Atomic hypothesis, 129-132 



Atomic weight, 84, 87 



Atoms, 130 et seq. 



Avogadro's law, 137 



BALANCE wheel of chronometers, 27 



Barnes and Callendar, on specific heat of 

 water, 79-80, 127 



Bartoli, on radiation, 248, 333 



Bartoli and Stracciati on specific heat 

 of water, 78-80, 127 



Benzene, critical constants of, 193 



Berget, heat conductivity of mercury, 

 99 



Berthelot, on latent heat of steam, 179 



Beryllium, atomic heat, 87 



Bismuth, heat conductivity of, 100 ; 

 electric conductivity of, 100 ; 

 velocity of light in, 100 



Boilers, heat conductivity of walls of, 90 



Boiling, 163-167 



Boiling-points, 175, 199 ; of water as a 

 fixed point on thermometric scales, 

 4, 5 ; relation of, to pressure, 163- 

 168 ; determination of, 175 ; rise of, 

 321-322 



Bolometer, 222, 227, 228, 253 



Boltzmann, on energy of molecules, 139 ; 

 on radiation, 248, 253 



Borate of lead, radiation of, 227 



Boron, specific heat of, 82, 87 ; atomic 

 heat, 87 



Bottomley, constant volume thermo- 

 meter, 50 ; air thermometer, 50 



843 



