INDEX. 



349 



Melting-point, 199-204 ; influence of 

 hydrostatic pressure on, 317-319 ; 

 lowering of, 322 et seq. 



Membranes, permeable to some fluids, 

 not to others, 327 



Menai tubular bridge, allowance for ex- 

 pansion by heat, 23 



Mercury, mode of filling thermometer 

 tubes with, 3 ; freezing-point, 9 ; 

 boiling-point, 9, 12, 175 ; melting- 

 point, 12 ; used in the mercurial com- 

 pensating pendulum, 27 ; expansion 

 of with heat, 30-37 ; atomic weight, 

 87 ; specific heat, 85 ; atomic heat, 

 87 ; heat conductivity of, 99 ; value 

 of y for vapour of, 138 ; motion of 

 molecules in vapour of, 139 ; vapour, 

 tension of, 159 



Metals, heat conductivity of, 89, 90, 92, 

 96 et seq. ; viscosity of, 202 ; ab- 

 sorptive power of, 229, 232 ; radiant 

 reflective power of, 231-232 



Meyer, 0. E., on the kinetic theory of 

 gases, 134 ; on viscosity of gases, 

 146, 147 ; on gas equations, 155 



Meyer, V., method of determining vapour 

 density, 177 



Mica, heat conductivity of, 101 



Miculescu, on the mechanical equivalent 

 of heat, 125, 127 



Minimum thermometer, 13 



Molecular heat, 83, 87 



Molecular sphere of action, 142 



Molecules, 130 et seq.; collisions of, 133, 

 134, 143, 147, 152 et seq. ; 161 et seq. ; 

 velocities of, 134, 135 ; diameter of, 

 148 ; number of, per c.c. , 148, 149 ; 

 size of, 1 52 et seq. ; internal energy 

 of, 155-156 



Morby. See Reynolds 



Motion, energy of, 110, 131 



Miiller, method of measuring linear ex- 

 pansion of bars by, 21, 22 



MUller-Pouillet, on vapour pressure, 175 



NACOARI, on specific heat of metals, 81 

 Nernst, on Van der Waal's equation, 197 

 Neumann, molecular heat, 87 ; method 

 of measuring heat conductivities, 

 98 ; result for copper, 99 

 Newton's rings as a means of measuring 

 linear expansion of solids, 23, 24 ; 

 law of cooling, 243-246 ; formula for 

 velocity of sound, 290 

 Nichols, on specific gravity of ice, 72 

 Nichols and Hull, radiation pressure, 333 

 Nickel, specific heat of, 81, 87 ; atomic 

 weight, 87 ; atomic heat, 87 ; velo- 

 city of light in, 100 

 Nickel-steel, expansion of, by heat, 27 

 Nitrogen, atomic weight, 84 ; specific 

 heat, 84 ; atomic heat, 84 ; velocity 

 of molecules, 137 ; value of y for, 



139 ; effusion of, 141 ; critical points 

 of, 188, 189 ; critical constants of, 

 191 ; critical pressure of, 199 ; boil- 

 ing and melting points, 199; trans- 

 parency of, to radiations, 235 

 Nitrous oxide, radiations absorbed by, 



235 



Non-reversible cyclical engine, 270, 271 

 Nuclei, condensation on, 168 et scq. 



OAK, heat conductivity of, 103 

 Olefiant gas, radiations absorbed by, 235 

 Olzewski, on liquefaction of gases, 197, 



199 



Opacity, 234-235 

 Osmotic pressure, 321 el seq. ; molecular 



theory of, 332 



Ostwald, on the ice calorimeter, 73 

 Oxygen, boiling - point, 12 ; atomic 

 weight, 84 ; specific heat, 84 ; atomic 

 heat, 84, 87 ; velocity of molecules, 

 136 ; value of y for, 139 ; effusion of, 

 141 ; viscosity of, 146, 147 ; mean 

 free path of, 147-149 ; collision 

 frequency, 147 ; number of mole- 

 cules in 1 c.c. 149 ; diameter of mole- 

 cule, 149 ; critical point of, 188, 199; 

 liquefaction of, 197 ; critical pressure 

 of, 199 ; boiling and melting points, 

 199 ; transparency of, to radiations, 

 235 



PAPER, heat conductivity of, 89, 103 ; 

 emissive power of, 226 



Paraffin, heat conductivity of, 103 ; 

 melting-point of, under pressure, 204 



Parhelia, 217 



Pe"clet, method of measuring heat con- 

 ductivities, 95 



Pendulum, influence of heat on, as time 

 measurer, 17, 26 ; principle of the 

 gridiron, 26, 27 



Person, on latent heat, 205 



Pfeffer, on osmosis, 327 



Phosphorus, atomic weight, 87 ; specific 

 heat, 87 ; atomic heat, 87 ; physical 

 states of, 157 ; superfusion of, 201 ; 

 latent heat of, 205 ; radiation of, 242 



Pictet, on liquefaction of gases, 197 



Pipes, expansion of iron in, for carrying 

 water, 171 



Pitch, flow of, 132 



Planck, on radiation, 248, 249, 342 



Platinum, thermometric use of its electri- 

 cal resistance, 11 ; melting-point, 12 ; 

 expansion of, with heat, 28 ; specific 

 heat of, 81, 87 ; atomic weight, 87 ; 

 atomic heat, 87 ; heat conductivity 

 of, 99, 100 ; electric conductivity of, 

 100 ; velocity of light in, 100; emis- 

 sive power of, 227, 248, 255 



Platinum-rhodium wire, used in thermo- 

 metry, 12 



