666 



INDEX 



PAGE 



Eye and radiation: (general) 330 et seq. 



adaptation rate 331 



blind spot, vision in.' 332 



cones 332 



contrast sensitivity 331 



dimensions of points 332 



flux density at retina 332 



glare sensitivity 331 



heterochromatic sensibility ... 331 



persistence of vision 332 



photometric sensibility 331 



pupil diameters 332 



sensitiveness as function of ra- 

 diation 330 



to color differences. 332 



visibility of radiation, f (\) .... 332 



Factorials: y function n=i to 2 64 



logs, n=i to 20 40 



n ! , n = i to 20 47 



Factors, conversion 3, 4 



Faraday 87-89 



Fechner's law 33-2 



Ferromagnetism 463 



Field, magnetic: earth's, components 574-595 



metals, behavior in 463-475 



resistance in 481 



rotation of polarization plane. .476-480 

 thermogalvanomagnetic effects . . . 482 



Filaments, heat losses from 329 



Films, oil, thickness of 551 



photographic 342 



thin, properties of (I. C. T., 4, 475) 

 Filters : {see also color-screens, absorption) 



light 384 et seq. 



narrow spectrum regions 384 



First magnitude stars 619 



Flame temperatures 310 



Flammable, non-, liquids (for cryostats) 251 



Flash-lights, characteristics 339 



Flash points (I. C. T., 2, 150, 161, 211) 



Fluidity, definition 205, 659 



gasolines, kerosene 207 



Fluorescence (I. C. T., 5, 390, 391) 



Flux, luminous 333 



magnetic, definition 463 



radiant 333 



Fog, photographic 341 



Foils, metal 108 



Foot-candle 333 



Foot-poundal 659 



Foot-pounds, definition 659 



kg meters 251 



to horsepower 251 



Forbidden lines (spectrum series) 502 



Forces, wind: cylinders 200 



flat plates 198-199 



miscellaneous 202 



spheres 201 



Formulae, conversion, dimensional xxxl, 3, 4 



derivatives and integrals 12 



least squares 56-59 



series 13 



Fourier 279 



Fraunhofer lines, wave lengths 346 



Free energy (I. C. T., 5, 87; 7, 224) 



paths, molecules 550 



Freeze, anti-, mixtures 279 



Freezing mixtures 270 



points 252-261 



, lowering of in salt solutions. .267, 268 



Water, pressure effect 253 



Frequencies, corresponding to wave lengths 374 



in air, reduction to vacuo 374 



Frequency, molecular collisions 550 



resistance, high 449 



unit potential, associated with, e/h. . . . 105 



Fresnel formula: reflection of light 376 



Friction: (general) 204 



internal 137 



skin, in air 203 



Frictional electricity series 408 



Fugacities (gases) 146 



Functions: Bessel, general formulae 70 



(roots 70) 68-70 



cylindrical 68-70 



elliptic integrals 71 



exponential ....,,.., 48-56 



PAGE 



Functions: gamma 64 



hyperbolic 41 



probability 56-61 



trigonometric, circular ("') 32 



(radians) 37 



zonal harmonics 66 



Fundamental standards xli 



units xxxi, xxxix 



Fusion, current for 416 



latent heats of, elements 288 



various 294 



volume change on (I. C. T., 2, 459; 4, 9) 



7 rays (see gamma rays and radioactivity) 



Gage pressures to true pressures 147 



Gages, wire 420 



Galactic concentration, stars vs. spectra and m.... 620 



coordinates to R. A., decl 604-605 



pole 601, 604, 605 



Galaxies, external: mag., rad. v., distances 641 



rotation 643 



Galaxy, and super-, meta- 616 



Galvanometric effect 482 



Gamma function, n, 1 to 2 64, 65 



, photographic 341 



rays: (see also radioactivity) 516 et seq. 



absorption 532 



emission of 529 



energy 529, 534 



ionization 530 



nuclear analysis 530 



energy from spectra 534 



scattering 531 



sources, comparison of 531 



spectra 529, 533 



wave lengths 529, 534 



Gas constant 75, 141 



thermometer corrections to thermodynamic 



scale 249 



Gases: absorption by liquids 221 



coefficients, long-wave 393, 395 



X rays 545 



accommodation coefficients (I. C. T., 5, 53) 

 adsorption (I. C. T., 3, 249) 



collisions, elastic, electronic 511 



inelastic 511 



compressibilities 143 



0° C, 76 cm 144 



high pressures 147 



100-1000 atm 145 



low temperatures 144 



conductivity, thermal 277 



critical constants 271 



densities 1 76 



dielectric constants 442 



electron impacts 511 



entropy (I. C. T., 5, 84; 7, 224) 



expansion, thermal 284 



flow (I. C. T., 1, 91; 5, 1) 



free energy (I. 0. T., 5, 87; 7, 224) 



fugacity (I. C. T., 7, 224) 146 



ignition temperatures of mixtures 310 



interstellar 644 



ionization by impact 511 



Joule-Thomson effect (I. C. T., 5, 144) 



magnetic susceptibility 475 



magneto-optic rotation 479 



p, v, T relations, general 



(I. C. T., 3, 3L.141-142 



S0 2 , NHa 148 



refractive indices 373 



resistance, aerodynamical 196-203 



solubility in water 219 



sound, velocity of, in 191 



viscosity 213, 214 



volume changes, various pressures 142 



volumes, correction to 760 mm 0° C 143 



f(t) 149-152 



logs 153 et seq. 



Gasolines, fluidities 207 



Gauss 659 



Gaussian units xliii 



Geocheraical data 5 72 



Geodetic data 564-568 



Geographical data, land areas, mountain elevation. 569 



ocean areas 569 



sea depths 569 



thermal gradients 569 



