INDEX. 



451 



Ynits of measurements, see Introduction ... 



electrical, absolute . . . 



international . 



legal . . . 



practical . . 



fundamental 



photometric 



radioactive 



work, transformation factors 

 Uranium group of radio-active substances .... 



PAGE 



. xxiii 

 . xxxv i 

 . xxxvi 

 xxxvii 

 . xxxvi 

 xxiii 

 . 260 

 . 394 

 197 

 396 



T, ratio electro-magnetic to static units . . xxx, xxxvi 



Vacuo, reduction of densities to 73 



weighings to 73 



Valencies of the elements 7 1 



Van der Waal's constants 212 



Vaporization, latent heat Of: 231 



ammonia 232 



elements, theoretical . 233 



formula 232 



steam tables . . . .234 



Vapor pressure: alcohol ethyl 178 



methyl 178 



aqueous (see water below) . . 183, 234 



carbon disulphide i79 



elements *75 



mercury 180 



radium emanation ....... 398 



salt solutions 181 



various 179180 



water: atmospheric via wet and dry 



sea-level . . . 186 

 other altitudes . 185 



saturated 183 



steam tables 234 



Vapor, water; weight per m 3 and ft 3 185 



Vapors: densities 127, 234 



diffusion of 167, 168 



heats of vaporization 231-239 



heats specific 230 



pressures, see vapor pressures .... 175186 



refractive indices 292 



specific heats 230 



viscosities 164 



water, transparency to radiation . . . 308, 419 



Velocity of light 408, 414 



molecules 399 



sound, in gases 147 



liquids 147 



solids 146 



stars 4H 412 



sun 411 



Verdet's constant (magneto- optic) 378-382 



gases 382 



liquids 380 



solids 379 



solutions, aqueous 381 



Vessels, volume of glass, via Hg 72 



Villari magnetic effect 365 



Viscosity: air 164 



alcohol ethyl, f(t, dilution) 155 



castor oil, f(t) 156 



centipoise, definition 155 



definition 155 



earth 427 



gases, temperature and pressure var. 164-165 



glycerol, dilution variation 156 



liquids, f(t) 157-158 



specific: solutions, f(dens., t) .... 159 



atom. cone. 25 C. . 163 



sucrose solutions, f(t, dilution) .... 156 



vapors, f (p, t) 164-165 



water, f(t) 155 



Visibility of radiation 256-258 



relative of various colors 256-258 



white lights 260 



Vision, distinct 258 



persistence of 258 



Voice, pitch limits of 149 



Voltages: accumulators 313 



contact 314, 316, 404 



Peltier 321 



standard cells 313 



thermoelectric 317-320 



pressure effect 320 



voltaic cells 312-313 



Weston normal xli 



Weston portable . xliii 



PAGE 



Voltaic cells; comp., emf: double fluid 312 



secondary 313 



single fluid 313 



standard 313 



storage 313 



Voltameter, silver xl 



Volts, electrical equivalents 311 



Volts, legal, international xli, 3 1 1 



Volume atomic, 50 K 226 



critical for gases 212 



glass vessels, determination of 72 



gases, f (p) 104-106 



f(t) 128-132 



mercury, 10 to +360 C 121 



resistance of dielectrics 331 



specific of elements 225 



water, o to 40 C 119 



10 to 250 C 120 



Vowels, tone characteristics 149 



Waal's (van der) constants 212 



Water: boiling point, f(p) 144 



density,f (t) o to 4iC, 10 to 25oC 118-120 



solutions, ethyl alcohol 124 



glycerol 156 



methyl alcohol 126 



sucrose 156 



sugar (cane) 126 



sulphuric acid 126 



various . . . 122, 159-163 



freezing point, f( pressure) 200 



ionization of 352 



melting point, f(p) 200 



pressure (hydrostatic) of columns of ... 136 



solutions: boiling points 210 



densities, see water, density solu- 

 tions . . 118-126, 156, 159-163 



diffusion 166 



electrolytic conduction . . 346-352 



freezing points 208 



viscosities 156, 159-163 



specific heat 227 



thermal conductivity : 216 



transparency to radiation 307 



vapor pressure 234239, 183184 



vapor pressure of in atmosphere . . . 185189 



viscosity, f(t) 155 



volume, o to 40 C, 10 to 250 C. 119, 120 

 Water-vapor, determination in atmosphere, via wet 



and dry sea-level 186 



various altitudes . . . . 185 



relative humidity via wet and dry . . 189 



dry and v.p. . . 187 



in atmosphere, f (altitude) 421 



transparency 308, 419 



weight saturated per m 3 and ft 3 . . . 185 



Watt xxxvii, xlv, 311 



Wave-lengths: Angstrom, definition 266 



cadmium red line 266 



Crova 261 



elements, international scale . . 267, 270 



Fraunhofer solar lines ' 265 



iron arc standards 266267 



neon, international scale . . . . . 266 



pipes (sound) 149 



limits. Hertz, X, visible, etc. ... 408 



Rontgen 390-393 



Rowland solar 272 



corrections to Intern X 272 



solar, Fraunhofer lines 265 



Rowland 272 



standard pressure, correction to ... 268 



standards: international primary . . 266 



secondary 266-267 



tertiary . . 267 



vacuo, reduction to 293 



wireless 362-364 



X-ray 390-393 



Waves, energy of sound 149 



Weighings, reduction to vacuo 73 



Weight sheet metal 116 



Weights, atomic 71 



Weights and Measures: customary to metric ... 5 

 metric to customary ... 6 

 metric to imperial .... 8 

 imperial to metric .... 10 

 miscellaneous 7 



