346 



INDEX. 



Expansion of liquids by heat, 2, 29-40 

 Expansion of metals by heat, 2 ; between 

 fixed points varies for each sub- 

 stance, 9 ; methods and results of 

 measuring, 17-28 

 Expansion of solids by heat, 2, 17-28 



FAHRENHEIT scale, 4 



Fairbairn and Tait, on density of steam, 



178, 308 

 Faraday, on conservation of energy, 108- 



109 ; on the critical points, 188 ; 



on liquefaction of gases, 197 ; on 



regelation, 201 



Feathers, heat conductivity of, 90 

 Fir, heat conductivity of, 103 

 Fire-damp, 92 



Fizeau, method of measuring linear ex- 

 pansion of solids, 23, 24 

 Fogs, 160, 169, 170, 171, 172, 218 

 Forbes, experiment on conductivity of 



iron, 97, 98, 99 ; on regelation, 201- 



202 ; on radiation, 227 

 Fourier, on heat conductivity, 107 

 Franz. See Wiedermann 

 Friction, 130, 131 

 Friedlander, on dust particles in air, 



170 



Furs, heat conductivity of, 90 

 Fusion, resemblance of solution to, 207- 



208 



GALITZINE and Wiliss, relation of re- 

 fractive index to critical point, 192 



Gannon. See Schuster 



Gas, use of term, 158, 159 



Gas-engine, 279 



Gas thermometry, 46-48 



Gases, expansion of, with rise of tem- 

 perature, 41-52 ; volume expansion 

 at constant pressure, 42-44 ; increase 

 of pressure with constant volume, 

 44-46 ; gas thermometry, 46-48 ; 

 Regnault's normal air thermometer, 

 48-49 ; hydrogen thermometer, 49- 

 50; Callendar's and Bottomley's 

 constant volume thermometers, 50 ; 

 Bottomley's air thermometer, 50 ; 

 constant pressure gas thermometer, 

 50-51 ; Callendar's compensating 

 thermometers, 51-52 ; convection of, 

 55-63, 90, 91 ; specific heat of, 70- 

 71 ; heat conductivity of 90, 91, 

 106, 107, 147, 148; kinetic theory 

 of, 133 et seq. ; liquefaction of, 197- 

 199 ; transparency and opacity of, 

 234-236 ; spectra of, 242 ; adiabatics 

 of, 261, 295-296; value of 7 for, 

 290-296 ; energy taken up by ex- 

 panding, 296 et seq. 



Gay-Lussac, on volume expansion of 

 gases under constant pressure, 42 ; 

 expansion without external work, 



119, 120, 261 ; method of determin- 

 ing vapour density as modified by 

 Hoffmann, 176, 177 ; and Welter, on 

 specific heats of air, 292 



Germanium, atomic heat, 87 



Gibbs, W., on phases of matter, 312 



Glaciers, motion of, 201-202 



Glass, sluggishness of volume change 

 with temperature as a source of 

 error in thermometers, 7 ; should 

 be of uniform quality for thermo- 

 meters, 8 ; expansion of, by heat, 19, 

 22, 25, 27, 28, 29 ; heat conductivity 

 of, 89, 103 ; absorption of light by, 

 225 ; radiation reflective power of, 

 230 ; radiation transparency of, 234 ; 

 radiating power of, 240, 243 



Glycerine, heat conductivity of, 106 



Gold, melting-point, 12 ; atomic weight, 

 87 ; specific heat, 87 ; atomic heat, 

 87 ; heat conductivity of, 99, 100 ; 

 electric conductivity of, 100 ; velo- 

 city of light in, 109 ; radiation, 

 emissive power of, 226 ; radiation, 

 reflective power of, 531 



Graham, on osmosis, 327 



Graphite, specific heat of, 82 



Gravitation, analogies with entropy, 276, 

 277 



Gray, J. H., experiments on heat con- 

 ductivities of metals, 98, 99 



Gridiron pendulum, 26, 27 



Griffiths, method of determining specific 

 heat of water, 76, 78. 80, 127 ; on 

 the mechanical equivalent of heat, 

 126, 127; on the latent heat of 

 steam, 180-181 



Guillaume, his nickel steel termed 

 " Invar," 27 



HAIL, genesis of, 218 



Halos, 216, 217 



Hampson, on liquefaction of gases, 198 



Harden, on liquefaction of gases, 197 



Hazen, dew-point tables, 212 



Heat, idea qonveyed by the term, 1 ; 

 relation of work and, in steam 

 engine, 9, 258 et seq. ; quantity of, 

 64 ; unit or calory, 65 ; specific heat, 

 " 66-87 ; heat energy, 111 et seq. ; 

 mechanical equivalent of, 116-128; 

 latent, 157 ; heat engines, 261-264 ; 

 relation of, to entropy, 276, 277; 

 dissipation of energy into, 278 



Heat engines, ideal, 9, 10, 262 et seq. 



Heat sensations, words used for express- 

 ing, 1 ; relation of, to thermal equi- 

 librium, 2 



Helium, value of 7 for, 138; motion of 

 molecules in, 139 



Helmholtz, on viscid water, 202 ; ripple 

 clouds, 216 ; sun energy, 257 



Henning, latent heat of steam, 181 



