348 



INDEX. 



204, 309 ; on work done in expand- 

 ing gases, 297 et seq. ; on vapour 

 pressure of curved liquid surfaces, 

 314-317 



Kidd. See M'Connel 



Kinetic energy, conception of, 1, 109 

 et seq., 129 et seq. ; relation of, to 

 heat energy, 118-128, 130 et seq., 199 



Kinetic theory of matter, 129-156 ; 

 atomic hypotheses, 129-133 ; gases, 

 133 et seq. ; mean value of the square 

 of the velocity of translation, 134- 

 137; mixture of gases, 137; Avo- 

 gadro's law, 137 ; relation between 

 V and temperature, 137 ; energy of 

 translation and internal energy, 

 138 - 140 ; Joule's approximate 

 method of calculating the velocity 

 of mean square, 140; effusion or 

 transpiiation through a small orifice 

 into a vacuum, 140; thermal tran- 

 spiration, 141-142 ; the mean free 

 path, 142-143 ; length of same, 143- 

 144 ; the mean free path calculated 

 from the coefficient of viscosity of a 

 gas, 144-147 ; conduction of heat in 

 gases, 147-148; the diameter of mole- 

 cules and number of molecules per 

 cubic centimetre, 148 - 149 ; forces 

 acting on unequally heated surfaces 

 in high vacua, 140-152 ; the gas 

 equation of Van der Waals, 152-156 



Kirchhoff, on vapour-pressure of ice, 173 



Knoblauch, on diffusion, 231 



Kopp, on molecular and atomic heats, 87 



Kundt, experiments on relation of light, 

 heat, and electric conductivities of 

 metals, 100 



Kundt and Warburg, heat conductivity 

 of gases, 107 



Kurlbaum, on energy of radiation, 250, 

 256 



LAMPBLACK, absorption of heat by, 225, 

 231, 232; radiation, emissive power 

 of, 226, 227, 231, 232, 239; radia- 

 tion absorptive power of, 230, 237 ; 

 radiation diffusion by, 231 ; trans- 

 parency to radiations of great wave 

 length, 234 



Langley, on radiation, 222, 226, 227-228, 

 234, 242, 252, 253-254, 256 



Laplace, on velocity of sound, 290 



Larmor, on radiation, 333 



Latent heat, 157, 178-182, 204-205 ; first 

 equation, 306-312 ; second equation, 

 312-314 



Lavoisier and Laplace's method of 

 measuring expansion of bars by 

 heat, 20-23 



Le Chatelier, thermo-electric thermo- 

 meter of, 12 



Lead, melting-point, 21 ; specific heat, 



65, 66, 81, 83, 186; atomic weight, 

 87 ; atomic heat, 87 ; heat conduc- 

 tivity of, 100 ; electric conductivity 

 of, 100 ; latent heat of, 205 ; emis- 

 sive power of, 226 



Lebedew, on radiation pressure, 333 

 Lees, heat conductivity of brass, 98, 99 ; 

 of crystals, 101 ; of various solids, 

 102, 103; of liquids, 104-106 

 Leslie, on radiation, 220-221, 226, 228- 



230 



Light, action of, on condensation nuclei, 

 171, 172 ; resembles radiant energy, 

 222-224 



Light energy, 113, 117, 129, 155, 156 

 Linde, liquefaction of gas, 198 

 Liquefaction of gases, 197-199 

 Liquid-solid change of state, 200-208 

 Liquid-vapour change of state, 157-199 

 Liquids, volume expansion, 29 ; as 

 measured by U-tube method, 29-36 ; 

 by the dilatometer, 36 ; Matthies- 

 sen's method, 37 ; convection of, 53- 

 55, 90; specific heat of, 69 et seq.; 

 heat conductivity of, 90, 103-106 ; 

 atoms and molecules of, 132 ; vapour 

 pressures of, 172-175 ; isothermals 

 for, 260 

 Lodge, on dust-free space about hot 



bodies, 152 



Lorberg, heat conductivity of water, 104 

 Ludin, on specific heat of water, 79, 80 

 Lummer and Pringsheim, on radiation, 



249, 342 



Lundquist, heat conductivity of water, 

 104 



M'CONNEL and Kidd, on ice, 202 

 Magnetic energy, 114, 118, 129 

 Magnus, on vapour pressure of water, 



175 



Mahogany, heat conductivity of, 103 

 Marble, heat conductivity of, 103 

 Marsh gas, radiation absorbed by, 235 

 Mathias. See Cailletet. 

 Matter. See Kinetic theory of Matter. 

 Matthiessen, hydrostatic method of 



measuring expansion of liquids and 



metals, 37 



Maximum thermometer, 13 

 Maxwell, heat conductivity of gases, 106, 



107 ; on velocity of molecules, 136, 



on mean free path, 144 ; on viscosity, 



146 ; on number of molecules per cc. 



of gas, 149; on radiometer, 150; 



on pressure of radiation, 333, 334 

 Mayer, on mechanical equivalent of heat, 



118, 120 



Mean free path, 142 ct seq. 

 Mechanical equivalent of heat, 116-128 

 Melloni, on radiation, 221, 226, 228, 229, 



230, 231, 234 

 Melting, explanation of, 205-207 



