450 



INDEX. 



PAGE 



Foot pound 436 



Fork, tuning, temperature coefficient 149 



Formation, lieat of, for elements 245, 246 



Foimu.ie: ccnversion 3 



dimensional, see introduction xxv 



least squares 59 



I'raunhofer lines, solar, wave-lengths 265 



Free path of molecules • • • 399 



Freezing mixtui'es 211 



point, lowering of for salt solutions . . . 208 



point of water, pressure effect 200 



Frequencies, corresponding to wave-lengths .... 293 



in air, reduction to vacuo 293 



Friction, mechanical 154 



internal of metals, temp, variation . . . 10 1 



sliin (air resistance) 152 



Frictional electricity series 322 



Functions: Bessel functions (roots, 68) ... 66-68 



cylindrical harmonics 66-68 



elliptic 69 



exponential 48-56 



gamma 62 



hyperbolic 41 



probability 56-58 



trigonometric, circular (° ') 32 



trigonometric, circular (radians) ... 37 



zonal harmonics 64 



Fundamental frequency (Rydberg) 408 



Fundamental standards xxxiii 



units xxiii 



Fusion current for wires 329 



Fusion, latent heat of 240 



Gages, wire 333 



Galvano-magnetic effects 385 



Gamma function 62 



Gas constant 408 



Gas thermometry 192—194 



Gases: absorption of by liquids 172 



absorption of by water 170-171 



absorption coef: long-wave radiation . . . 309 



X-rays 389 



compressibility 104 



conductivity, thermal 217 



critical data 212 



densities 127 



dielectric constants 356-361 



strength 353-3SS 



diffusion 168 



ionic 405 



expansion coefficients 222 



expansion of 128—132 



flow in tubes 150 



Ignition temperatures of mixtures 244 



magnetic susceptibility 377 



magnetic-optical rotation 382 



refractive indices 292 



resistance (aerodynamical) 150-153 



solubility in water 170— 171 



sound, velocity of, in 147 



specific heats (also Cp/c^) 230 



viscosity 164-165 



volume, f(t, p) 104—106 



f(t), I -f 0.00367, logs . . . 128—132 



Gauss xlv, 365 



Gaussian system of units xxxv 



Geochemical data 423 



Geodetic data 424-427 



Gilbert 311 



Glare sensibility of eye 257 



Glasses: refraction indices, American 277 



German, temp. var. . . 278 



resistance electric, temp, var 332 



transparency of 302—304, 306-307 



Glass vessels, volume of . 72 



Gram-molecule, definition 436 



Grating space of calcite 408 



Gravitation constant 427 



Gravity, acceleration of, altitude variation .... 424 

 latitude variation .... 424 

 observed values . . . 425-426 

 Gravity specific, see densities. 



Gudermanlans • 4i 



Gyration, radii of 70 



Hall effect, temperature variation 385 



PAGE 



Hardness: (sec mechanical properties) ...... 74 



Brinell test 74 



elements 101 



scleroscope test 74 



Harmonics: cylindrical (Bessel) 66-68 



roots, lormuliE . . 68 



zonal 64 



Heat: adsorption heats 407 



atomic heats of elements 226 



combination 245—246 



combustion: explosives 243-244 



fuels 242 



gases 242 



organic compounds 241 



conductivity: metals (also high temp.) . . . 213 



gases 217,254 



liquids 217 



diffusivlties 217 



dilution, heat of, HaSO* 246 



formation 245—246 



latent heat of fusion 240 



vaporization, elements . . .233 



NH3 232 



steam 234 



various . . 232-233 

 pressure variation, NH3 liq. . .232 



losses from incandescent wires 255 



mechanical equivalent of 197 



neutralization, H2SO4 246 



solution 246 



specific: alloys 227 



ammonia, liq 228 



electricity 317 



elements 233 



gases 230 



liquids 227-228 



mercury 227 



minerals, roclts 229 



silicates 229 



solids 227 



true [elements, f(t)] 223 



vapors 230 



water 227 



total [elements, f(t)] 225 



treatment of steels 76 



Heating effect, radium and emanation 394 



Hefner unit 260 



Heights, barometric determination of 145 



boiling point of water determination of . . 144 



Helium, production, relation to radium 394 



Henry xxxvii, xliv, 311 



Heterochromatic sensibility of eye 257 



Hertzen wave-lengths 408 



High-frequency electric resistance of wires .... 344 



Horizontal intensity earth's field, 19 15 . . . .431 



secular var. . . 431 



Horse power 197 



Humidity, relative: vapor-pressure and dry . . . . 187 



wet and dry 189 



Hydrogen: atomic data, mass, radius, etc 408 



series spectra 275,401 



thermometer 192-194 



Hydrolysis of ammonium acetate 352 



Hydrostatic pressures of Hg and HoO columns . . 136 

 Hyperbolic functions, natural and logarithmic ... 41 

 Hysteresis 36s et seq, 375-376 



Ice, allotropie modifications 200 



freezing point, pressure effects 200 



Ice-point, thermodynamic scale 195 



Ignition temperatures gaseous mixtures 244 



Incandescent filaments, heat losses 255 



Inclination (dip) of magnetic needle, 19 1 5 .... 430 



secular var. . . 430 



Index of refraction: air 293 



alums 281 



crystals, see minerals, etc. .282-289 



fats 289 



fluorite, f(t) 280 



gases and vapors 292 



glass American 277 



German f(t) 278 



Iceland spar 280 



liquefied gases 289 



liquids 290 



metals 296 



minerals, isotropic 282 



uniaxial 284 



biaxial . , , , . 286 



