INDEX. 



355 



Vapor, aqueous: relative humidity 160 



(saturated) weight of . . . .156 



Vaporization, latent heat of . .214 



for steam . . 254, 255 



Vapors: densities 91 



diffusion of 139, 140 



indices of refraction 193 



pressures: alcohol, ethyl, methyl . . . 149 



aqueous I54-I55 



mercury 151 



salt solutions 152 



various 147-155 



specific heats 243 



viscosity 136-137 



Velocity of light 109 



sound; in gases and liquids . . .102 



solids 101 



stars no 



sun no 



Verdet's constants: Verdet and Kundt's . . . 330 



gases 330 



liquids 328 



solids 327 



solutions, aqueous . . . .329 



Viscosity: alcohol in water 128 



pses 136-137 



liquids 128-129 



vapors 138-137 



water: temperature variation . . .127 



specific: gases 136-137 



oUs 128 



solutions 131-135 



vapors 136-137 



water: temp, var 127 



Visibility of white lights 178 



Voltaic cells: composition, E. M. F. . . 262-263 



double-fluid 263 



secondary 263 



single-fluid 262 



standard 261, 263 



storage 263 



Volts, legal (international) .... xxxvi, 261 



Volume of mercury meniscus 123 



Volumes: critical, for gases 231 



gases 164 



glass vessels, determinations of . . . n 

 Water: boiling-points for various pressures: 



common measures . .170 



metric measures . .171 



densities, temperature variation . . 95, 96 



Water: ionization of 309 



solutions in: boiling-points 228 



densities .... 92, 98-100 



diffusion 138 



electrolytic conduction 302-308 

 solutions of alcohol, densities . . . 98-100 



thermal conductivity 207 



transparency of 202 



vapor pressure 154-155 



vapor, pressure of, in atmosphere . . .157 

 (saturated) weights of . . . .156 



transparency of 181 



viscosity: absolute, temp, var 127 



specific, temp, var 127 



Wave-lengths: cadmium red line 172 



elements, brighter lines . . . .172 

 Fabry-Buisson iron arc lines . .172 



Fraunhofer lines 177 



iron lines, Fabry-Buisson . . .172 



primary standards 172 



Rowland's solar lines . . . .173 



secondary standards 172 



solar lines (Rowland) ' . . . .173 



tertiary standards 176 



wireless telegraphy . . . 298-300 



Weighings-reduction to vacuo 82 



Weights and measures: British to metric . . o-io 

 metric to British . . . 7-8 

 metric to U. S. ... 6 

 U. S. to metric ... 5 



Weights of bodies \ . . 67 



Weights of sheet metal 89 



Wind pressures 124 



Wire gages 283 



Wire tables, aluminum English 292 



metric 293 



copper English 286 



metric 289 



Wires, carrying capacity of 279 



Wireless telegraphy 298-300 



Woods: densities of 85 



strength of 69-70 



X-rays 33S-336 



Yearly temperature means 183 



Young's modulus of elasticity 72 



Zero, thermodynamic ice-point 247 



Zonal harmonics 164 



