566 



INDEX 



ULTRAMARINE, 471 

 Ultra-microscope, 440 

 Uranium, 534, 545-6 



VALENCE, 211-7, 228 

 and atomic structure, 552 



Vapor pressure, of solutions, 117, 177, 



190 

 of water, 47, 63, 558 



Vaporization, 61 



Ventilation, 291 



Vinegar, 419 



Viscose, 399 



Vitamins, 436-7 



Volume, standard 73, 79, 83 



WASHING soda, 367, 391 

 Water, 58-70 



as a solvent, 65-122 



association of, 122 



coagulation process, 470 



composition by volume, 59, 105 

 by weight, 58 



Water, hardness, 388-9 



ionization of, 190 



purification, 66 



softening, 389-91 



vapor in air, 288-90 



pressure of, 47, 63, 558 

 Water-gas, 337-8 

 Waters, carburetted, 356 



natural, 65 

 Weights, atomic, 76-7, 85, 281 



combining, 76-7 



equivalent, 53, 122 



formula, 134 



molecular, 75, 83-4 

 Wood, distillation of, 420 

 Wood's metal, 326 

 Wool, 1, 438 



XENON, 297 

 Xylene, 353 



ZINC, 448-5 

 salts of, 450-1 



