352 



INDEX. 



Index of refraction: glass 184 



Iceland spar 186 



liquids 192 



metals 195-196 



monorefringent solids . .188 

 nitroso-dimethyl-aniline . 186 



quartz 187 



rock-salt 185 



salt solutions 191 



silvine 185 



solids, isotrppic . . . . 188 



Inductive capacity, specific: calibration st'ds . .313 



gases, atm. pressure 309 



pressure coef . 309 



temp. coef. .310 



liquids 310 



temp. coef. . 312 

 solids . . . 313-314 



Inertia, table of moments of 67 



Inorganic compounds: boiling-points . . . .219 

 melting-points . . . .219 



Insulators, resistances 282 



temperature coefficients 282 



Integral, diffusion 60 



elliptic 56 



gamma function 62 



probability 54. 57~58 



Integrals, elementary 12 



Intensity, horizontal, of earth's field . . . .114 

 secular variation 1 14 



total, of earth's field 115 



secular variation 115 

 Intrinsic brightness of various lights . . . .178 



lonization of water 308 



lonization, a, /3, y, rays 337, 34i 



a 338 



X-rays 335 



Ions: equivalent conductivity of 308 



Iron: hysteresis in soft 322 



magnetic properties of, weak fields . 322 

 saturated . 321 



permeabilities 315-320 



standard arc lines, Fabry-Buisson . 172 

 secondary ^standards 172 

 tertiary standards . 176 



Joule's (mechanical) equivalent of heat . . .237 



Kerosene, dielectric strength 296 



Kerr's constant 33i 



Kerr's constant, dispersion of 331 



Kundt's constant 330 



definition of 330 



Lamps, efficiency of various electric . . . . 179 



Latent heat of fusion 216 



vaporization . . . .214,254,255 

 Latitude correction to barometer . . . 121-122 

 Latitudes of a few stations 117,183 



Least squares 56-59 



Legal electrical units xxxviii 



Leduc thermomagnetic effect 334 



Light: indices of refraction 184-196 



reflection of; function of "" . . . .197 



metals 195-198 



sensitiveness of eye to 180 



transmissibility to, of substances . 199-202 



polarized: rotation of plane by solutions . 203 



rotation, magneto . 326-331 



wave-lengths: cadmium st'd line . 172 



elements, brighter lines 172 



Fraunhofer lines . . 177 



st'd iron arc, Fabry . 172 



solar, Rowland . 173 



velocity of 109 



Lights, brightness of various 178 



efficiency of electric 179 



visibility of white 178 



Linear thermal expansion coef. of elements . .232 

 various . . . 233 



Liquids: absorption of gases by 144 



capillarity of 145-146 



compressibility of 79-80 



conductivity, thermal 207 



densities 83, 90, 94-100 



dielectric constants 310-312 



dielectric strength 296 



diffusion, aqueous solutions .... 138 



expansion, thermal 235 



fuels, heat of combustion 210 



magnetic susceptibility 332 



Liquids: magneto-optic rotation 328 



potential differences with liquids . . 264 

 metals . . . 267 

 salts . . . 264 



specific heats 241 



surface tensions 145-146 



thermal conductivity 207 



expansion 235 



vapor pressures 147-155 



velocity of sound 102 



viscosity 129-130 



Logarithms 26 



1000-2000 24 



and- 28 



.9000-1.0000 30 



Longitude of a few stations 117, 183 



Lowering of freezing-points by salts .... 227 



Lubricants for cutting tools 126 



Lunar parallax 109 



Mache radioactivity unit 341 



Maclaurin's theorem 12 



Magnetic field : bismuth, resistance in .... 333 

 Ettingshausen effect .... 334 

 galvanomagnetic effects . . . 334 



Hall effect 334 



Leduc effect 334 



Nernst effect 334 



nickel, resistance in 333 



optical rotation .... 326-331 



resistance of metals in .... 333 



thermo-magnetic effects . . . 334 



Magnetic observatories, magnetic elements . . H7 



Magnetic properties: of cobalt at 100 C . . .321 



iron: hysteresis . 322-325 



permeability 



315-317, 320-321 

 saturated . . .321 

 weak fields . . . 322 



magnetite 321 



nickel at 100 C . . . 321 



Magnetic susceptibility, liquids, gases .... 332 

 Magnetic units, conversion formulae .... 3 



Magnetism, terrestrial: agonic line 116 



declination m 



dip 113 



horizontal intensity . 1 14 

 inclination ... .113 

 intensity, horizontal . 114 

 total . . .US 

 observatories . . . 117 



Magneto-optic rotation 326-331 



Masses of the earth and planets no 



Materials, strength of: bricks 68 



concrete 68 



metals 68 



stones 68 



timber 69-70 



woods 60-70 



Mechanical equivalent of heat 237 



Melting-points: chemical elements . . . . .217 



eutectics 226 



inorganic compounds . . . .219 



minerals 226 



mixtures (alloys) 222 



(low melting-points) . 222 



organic compounds 223 



pressure effect 221 



Meniscus, volume of mercury 123 



Mercury: density of 97 



electric resistance of .... 273-274 



meniscus, volume of 123 



pressure of columns of 118 



specific heat 239 



vapor pressure 151 



Metals: diffusion of, into metals 140 



indices of refraction 195-196 



optical constants 195-196, 198 



potential differences with solids . . . 266 



solutions . . 267 



reflection of light by .... 195-196,198 



refractive indices '195-196 



resistance, electrical .... 273,284-293 



specific 274 



sheet, weight of 89 



transparency of 195 



Metallic reflection 195-196,198 



Methyl alcohol, density of aqueous 100 



Metric weights and measures: British equiv. . 7-10 



U. S. equivalents 5-6 



Minerals, densities of 88 



