154 



INDEX. 



Solar wave-lengths, Rowland's 173 



Solids: compressibility 73. 80 



densities 83-87 



dielectric constant 313 



electrical resistance 272-297 



hardness 73 



indices of refraction 185-190 



magneto-optic rotation by 327 



thermal conductivity 205-206 



expansion 232-234 



Solubility gases 142 



pressure effect 143 



salts 141 



Solutions: boiling-point, raising by salts in . . 229 

 boiling-points of aqueous . . . .229 



conductivity, thermal 207 



electrolytic . . 302-308 

 densities of aqueous . . 92-93, 98-100 



diffusion of aqueous 138 



freezing-points, lowering by salt . . 227 

 of aqueous .... 227 



indices of refraction 191 



magneto-optic rotation of .... 329 

 potential (contact) differences . 264-267 



specific heats 241-242 



surface tensions 143 



viscosities 131-135 



Sound, velocity of, in solids loi 



liquids and gases , . .102 



Sparking potentials 294-296 



Specific gravity, see Density. 



heat of air 243 



elements 238, 240 



gases 243 



liquids 241 



mercury 239 



minerals and rocks 242 



platinum 240 



quartz 240 



silica glass 240 



solids 241 



vapors 243 



water 239 



"Specific heat of electricity " 268 



Specific inductive capacity: gases . . . 309-310 

 liquids . . . 310-312 



solids 313 



molecular conductivities .... 303-304 



resistance 273-276 



viscosity: gases and vapors . . . 136-137 

 liquids and oils . . . 128-130 



solutions 131-135 



Spectra: elements, brighter lines 172 



iron, Fabry- Buisson 172 



Rontgen ray 336 



solar, Fraunhofer lines 177 



Rowland's measures 173 



Squares, least, tables 47-49 



Standard calibration temperature 247 



Standard cells 261-263 



wave-lengths: Fabry-Buisson . . . 172 



primary 172 



Rowland 173 



secondary 172 



tertiary 176 



Standards, photometric 178 



Stars, distance of no 



Stars, parallax no 



Stars, velocities of no 



Steam tables: metric units 254 



common " 25s 



Steel: magnetic properties: hysteresis . 319, 322-325 



permeabilities 315-322 



Stefan-Boltzmann radiation formula . . . .251 



Stellar velocities no 



Stone: strength of 68 



thermal conductivity 205 



Storage batteries 263 



Strength of materials : bricks 68 



concrete 68 



metals 68 



stones 68 



timber, woods . . . 69-70 



Sugar, densities aqueous solutions loo 



Sulphuric acid, densities aqueous solutions . . 100 



Sun: constant of radiation 181 



disk; distribution of intensity 181 



distance from earth 109 



light; ratio to sky-light 182 



magnitude no 



motion no 



Sun: parallax 109 



radiation 181 



spectrum 173, 181 



temperature 181 



Surface tension 145-146 



Sylvine, refractive indices 185 



Tangents circular, natural 32, 37 



logarithmic 32, 37 



hyperbolic natural 41 



logarithmic 41 



Taylor's series 13 



Telegraphy, wireless 298, 300 



Temperature, critical, for gases 231 



resistances for low 280 



resistance coefficients . . . 276-285 



sun's 181 



thermodynamic 247 



Temperatures, mean monthly 183 



Tensile strengths 68-70 



Tension, surface 145-146 



vapor, see Vapor pressure. 



Terrestrial magnetism: agonic line 116 



declination, secular change in 



dip 113 



secular change . . .113 



horizontal intensity . . .114 



secular change 114 



inclination 113 



secular change 113 



observatories 117 



total intensity . . . .115 

 secular change 115 



Thermal conductivities: gases 207 



liquids 207 



salt solutions .... 207 



solids , 205 



solids, high temperature 206 



water 207 



Thermal diffusivities 208 



Thermal expansion: cubical: crystals .... 234 



gases 236 



liquids .... 23S 



solids 234 



linear: elements .... 232 



various 233 



Thermal unit, dynamical equivalent .... 227 



Thermodynamic ice-point 247 



Thermodynamic scale of temperature .... 247 



Thermo-electricity 268-271 



Peltier effect .... 268,271 

 Thermo-elements, calibration curves .... 250 



Thermo-magnetic effects 334 



Thermometer: air- 16, 0° to 300° C 24S 



59, 100° to 200° C . . . . 24S 



high-temperature-59 . . . 246 - 



hydrogen-i6, o^ to 100° C . . . 244 



16, 59, -5° to -35° C . 244 



59, 0° to 100° C . . . 244 



various 246 



platinum resistance 247 



standard calibration points . . 247 

 Thermometer stem correction .... 248-249 



Thomson thermo-electric effect 268 



Timber, strength of 69-70 



Time equation of no 



Time, sidereal, solar 109 



Tools, lubricants for cutting 126 



Transformation points, minerals 226 



Transformer-iron, permeability of . . 315-316, 320 



steels, energy losses in . . 322-325 



TransmissibiUty to radiation: atmospheric . 181, 182 



crj'stais .... 200 



glass 199 



water .... 202 

 Trigonometric functions: arguments (°') ... 32 



(radians) . 37 



United States weights and measures, conversion 



to metric units 5-6 



Units of measurement: definitions, see Appendix. 



conversion factors .... 2-3 

 discussion, see Introduction. 



photometric 178 



ratio of electro-magnetic to static . . . 260 



V, ratio of electro-magnetic to -static units . . 260 



Vacuo, reduction of densities 82 



weighings 82 



Vapor, aqueous: vapor pressure .... 154-15S 

 pressure of, in atmosphere . . 157 



