INDEX. 



317 



Resistance: see also Conductivity. 



alloys, low temperature .... 264 

 alternating current, effect of ... 269 

 electrolytic, see Conductivity. 



glass and porcelain 285 



legal unit of 261 



magnetic field, of bismuth in ... 306 



metals in ... 306 



nickel in .... 306 



metals at low temperatures . . . 264 



ohm, various determinations of . .261 



specific: metals 263 



wires 262 



temperature variation . . 262-266, 285 



wire (copper) table, common units . 66 



metric units . . 68 



Rigidity, modulus of 74 



temperature variation . . 74 



Ring correction (magnetization) 288 



Rock-salt, indices of refraction 183 



Rods, demagnetizing factors for 289 



Rotation of polarized light: by solutions , . .19? 



Rotation, magneto-optic: formulae 297 



gases 304 



Kerr's constant . . 305 



liquids 299 



solids 298 



solutions . . . 301-303 



Verdet's constant 297-304 



Rowland's standard wave-lengths 171 



Salts, lowering of freezing-point by 217 



raising " boiling- ' " 219 



Saturation, magnetic, for steel 293 



Scales, musical 103 



Screens, color 195-196 



Seconds pendulum 107 



Secondary batteries 253 



Sections of wires 59-66 



Shearing tests of timber 72-73 



Sheet metal, weights of 70 



Silver, electro-chemical equivalent . . . 251, 270 



Silvine, indices of refraction 183 



Sines, natural and logarithmic, circular . . 30-38 

 hyperbolic . 39-40 



Sky-light, comparison with sunlight 179 



Soaring of planes, data for 123 



Solar constant of radiation 179 



energy, data of 179 



wave-lengths, Rowland's . . . . . .171 



Solids: compressibility 76, 83 



densities 85-89 



dielectric constant 283 



electrical resistance 261-269 



hardness 76 



indices of refraction 183-187 



magneto-optic rotation by 298 



thermal conductivity . 199 



expansion 222-224 



Solutions: boiling-point, raising by salts in . . 219 

 boiling-points of aqueous . . . .219 



conductivity, thermal 200 



electrolytic . . 272-278 



densities of aqueous 92-93 



diffusion of aqueous 136 



freezing-points, lowering by salt . .217 

 of aqueous . . . .217 



indices of refraction 188 



magneto-optic rotation of . . 301-303 

 potential (contact) differences . 254-257 

 specific heats ....... 230-231 



surface tensions 142 



viscosities 129-133 



Sound, velocity of, in solids 101 



liquids and gases . . .102 



Sparking potentials 248-250 



Specific gravity, see Density. 



heat of air 232 



elements 228 



gases 232 



iron at high temperatures . . 308 



liquids 230 



mercury 229 



minerals and rocks 231 



solids . . f . 230 



vapors . 232 



water 229 



" Specific heat of electricity " 258 



Specific inductive capacity: gases . . . 279-280 

 liquids . . . 280-282 



solids 283 



Specific molecular conductivities .... 373-274 



Specific resistance 262-263 



viscosity: gases and vapora . . . 134-135 

 liquids and oils . . . 126-128 



solutions 129-133 



Spectra: elements, brighter lines 170 



iron, Fabry-Buisson 170 



Kayser 174 



solar, Fraunhofer lines 176 



Rowland's measures . . . .171 



Squares, least, tables 47~49 



Standard cells 251-253 



wave-lengths: Fabry-Buisson . . . 170 



Kayser 174 



Rowland 171 



Standards, photometric 177 



Steam tables: metric units 241 



common " 242 



Steel: magnetic properties: hysteresis 291, 294-296 



permeabilities 286-294 



Stefan- Boltzmann radiation formula .... 238 



Stone: strength of 71 



thermal conductivity 199 



Storage batteries 253 



Strength of materials: bricka 71 



concrete 71 



metals 71 



stones 71 



timber, woods . . . 72-73 



Sun: constant of radiation 179 



disk; distribution of intensity . . . .179 



light; ratio to sky-light 179 



parallax 109 



radiation 179 



spectrum 171, i?9 



temperature 179 



Surface tension 142-143 



Susceptibility, magnetic, liquids and gases . . 305 

 Sylvine, refractive indices .183 



Taylor's series 12 



Temperature, critical, for gases 221 



resistances for low 264 



sun's 179 



Tensile strengths 71-73 



Tension, surface 142-143 



vapor, see Vapor pressure. 



Terrestrial magnetism: agonic line 115 



declination, secular change no 



dip 112 



secular change . . .112 



horizontal intensity . . .113 



secular change 113 



inclination 112 



secular change . 112 



total intensity 114 



secular change 114 



Thermal conductivities: gases 200 



liquids 200 



salt solutions .... 200 



solids 199 



water 200 



Thermal expansion: cubical: crystals . .224 



gases . .226 



liquids . . 225 



solids . . 224 



linear: elements . . 222 



various . . 223 



Thermal unit, dynamical equivalent . . 227 



Thermo-electricity 258-260 



Peltier effect .... 258, 260 



Thermo-magnetic effects 307 



Thermometer: air-i6, o* to 300 C 234 



59, 100 to 200 C . . . . 234 



high-temperature-59 . . . 235 



hydrogen- 1 6, o to 100 C . . . 233 



16, 59, -5 to -35 C . 233 



59, o to 100 C . . . 233 



various 235 



Thermometer stem correction 236-237 



Thomson thermo-electric effect 258 



Timber, strength of 72-73 



Time, sidereal, solar 108 



Transformer-iron, permeability of ... 286-287 



steels, energy losses in ... 294 296 



Transmissibility to radiation: atmospheric . 179 



crystals ... 194 



glass .... 193 



Trigonometric functions: arguments ( . . 30 



(radians) 35 



United States weights and measures, conversion 

 to metric units 5-0 



