3i8 



INDEX. 



Units of measurement: definitions, see Appendix. 



conversion factors .... 2-3 

 discussion, see Introduction. 



photometric I77 



ratio of electro-magnetic to static . . . 247 



V, ratio of electro-magnetic to -static units . . 247 



Vapor, aqueous: vapor pressure, low temp. . . isi 



o'^-ioo" C . . 152 



100^-230° C . IS3 



pressure of, in atmosphere . . 155 



relative humidity . . . . .158 



(saturated) weight of . . . . iS4 



Vaporization, latent heat of 206 



for steam . . 241,242 



Vapors: densities 91 



diffusion of I37, 138 



indices of refraction 190 



pressures: alcohol, ethyl, methyl . . . 146 



aqueous: low temp. . . .151 



o°-ioo^ C . . . 152 



ioo°-23o'' C . . .153 



mercury 148 



salt solutions 149 



various 144-148 



specific heats 232 



viscosity, specific 134 



Velocity of light 109 



sound; in gases and liquids . . .102 



solids loi 



Verdet's constants: Verdet and Kundt's . . . 304 



gasew 304, 305 



liquids 299, 305 



solids 298 



solutions, alcoholic .... 303 

 aqueous . . . .301 

 hydrochloric . . 303 



Viscosity: alcohol in water 126 



gases 13s 



liquids 127 



vapors 13s 



water: temperature variation . . .125 



specific: gases 134 



oils 126 



solutions 129-133 



vapors 134 



water: temp, var 125 



Voltaic cells: composition, E. M. F. . . 232-253 



double-fluid 253 



secondary 253 



single-fluid 252 



standard 251, 253 



storage 253 



Volts, legal (international) xxxiv, 251 



Volumes; critical, for gases 221 



Volumes: gases, perfect 162 



glass vessels, determinations of . . . 11 



Water: boiling-points for various pressures: 



common measures 168 



metric measures . 169 



densities, temperature variation . . 95, 96 



ionization of 278 



solutions in: boiling-points , . . .219 



densities 92 



diffusion 136 



electrolytic conduction 272-278 

 solutions of alcohol, densities . . . 98-100 



thermal conductivity , 200 



vapor pressure: low temperatures . .151 



0° to 100° C . , . . 152 



100'' to 230° C . . . 153 



vapor, pressure of, in atmosphere . . 155 



(saturated) weights of . . . .154 



viscosity: absolute, temp. var. . . , 125 



specific, temp, var 125 



Wave-lengths: cadmium red line 170 



elements, brighter lines . , . 170 

 Fabry-Buisson iron arc lines . . 170 



Fraunhofer lines 176 



iron lines, Fabry-Buisson . . . 170 



Kayser 174 



Kayser's iron arc lines .... 174 



Rowland's solar lines . . . .171 



solar lines (Rowland) .... 171 



Weights and measures: British to metric . . 9-10 



metric to British . . . 7-8 



metric to U. S. . . . 6 



U. S. to metric ... 5 



Weights of bodies 58 



Weights of sheet metal 70 



wire: copper, iron, brass: 



common units 60 

 metric units . 62 

 aluminum, common and metric . . 64 

 copper wire, electrical constants 



common units 66 

 metric units . 68 



Wind pressures 122 



Wire gauges: Birmingham 59 



British standard 59 



Brown and Sharp 66 



Wire, weights of: brass, copper, iron . . . 60, 62 



aluminum 64 



copper 66, 68 



Woods: densities of 87 



strength of ........ . 72-73 



Young's modulus of elasticity 75 



Zonal harmonica 54 



