668 



INDEX 



TAGF 



Index, of refraction: crystals: uniaxial: miscel- 

 laneous. 366 

 negative . . 365 

 positive . . 365 

 doubly refractive min- 

 erals 366 et seq. 



fats 37o 



fluorite, f(t) 361 



gases 373 



glass 356. 358 



Schott-Jena, f(t) 359 



Iceland spar, CaC0 3 361 



isotropic solids 364 



liquefied gases 370 



liquids 37°, 37i 



metals 377-378 



minerals: biaxial 367-370 



isotropic 363 



monorefringent . . . 363 



uniaxial 365-366 



nitroso-dimethyl aniline .... 361 



oils 370 



potassium permanganate .... 372 



quartz, amorphous, crystaline. 362 



rock salt, f(t) 360 



solutions, acids, salts 372 



standard media 375 



vapors 373 



waxes 370 



Indian Ocean basin, areas, depths 650 



Induction: equivalents 397 



magnetic, definition 463 



mutual, self 472 



Inductive capacity, specific: crystals 447 



gases, f(t, p) 442 



liquefied gases 445 



liquids, f(t, p) . . -443. 445 



solids 446 



standard solutions . . . 446 



Inertia: moments of 72 



photographic 341 



Inorganic compounds: boiling points 254 



densities 254 



melting points 254 



solubilities 218 



Insulators: break-down potentials 439-441 



dielectric properties ...439-441, 442-447 



resistance, electrical 418, 419 



thermal ....273, 274, 276, 279 



Integral : diffusion 60, 61 



elliptic 71 



exponential 62, 63 



formulae 12 



gamma function 64 



probability 56-57 



Intensification of photographic plates 345 



Intensity, horizontal magnetic: f(lat., long), U. S., 



1925 593 



I: annual change. . . 579 

 isodynamic lines, 



world 577 



isoporic lines, 



world 578 



secular change, 



U. S 593 



total magnetic: f(lat, long.), U. S., 



'925 594 



isoporic lines, world.... 580 



secular change, U. S... 594 



vertical magnetic: annual change 580 



isoporic lines, world.. 580 



International electrical units xlv 



standards xlvi 



to absolute units. . .77-81 



volt xlix 



temperature scale 239 



Interstellar calcium 644 



matter 644 



space 644 



temperature 645 



Intrinsic brightness, various light sources 334 



Inversions, enantistropic, of crystals 261-265 



heats of.. 26 1-265 



Ionium-radium family 517 



PAGE 



Ionization potentials, first 499, 614 



H, He+ 106 



second 500 



star space 644 



Ions: alpha particles, production of, by 522, 525 



atmospheric, upper 599-600 



equilibrium, atmospheric electricity 597 



gamma rays 530 



heat of formation 312 



mobilities 552 



Iron : alloys, mechanical properties m 



arc lines 347-349 



cast, properties of malleable 657 



Isobar 493 



Isodynamic (H) world lines 577 



Isogonic world lines, equal declination (D) 576 



Isoporic world chart: D, declination 577 



H, horizontal force 578 



I, inclination 578 



total intensity 580 



vertical intensity 580 



Isostasy 567 



Isotopes: packing fractions 484, 648 



radioactive 486 



Jena glasses: dispersion, f (t) 359 



transparency 386 



ultra-violet 387 



Joule, definition 659 



equivalents 86, 659 



magnetic effect 463 



Julian day calendar 603 



number 60 1 



period 60 1 



K, Boltzmann constant, 1.3078 x io~ le erg/deg. ... 104 



K X-ray spectrum 538-540 



Kerr's constant 479 



dispersion 480 



Kg-meter to ft. -lbs 251 



Kilocycle-meter conversion table (radio) 456-460 



Kilodyne 659 



Kinetic energy 659 



Kundt's constant 478 



L X-ray series 538-539 



Lambert, definition 333 



Lamps: brightness in candles/cm 2 of various. .338, 339 



energy, distribution, of tungsten 339 



miniature, characteristics: automobile .... 339 



movie 339 



surgical 339 



photofiash, characteristics 340 



photographic efficiency of some 344 



sunlight mazda, characteristics 340 



Land area of earth 5 69 



Lande's interval rule (spectra) 503 



Latent heat of fusion: elements 288, 294-295 



pressure variation 296 



vaporization: ammonia 296 



elements 295 



formulae 296 



liquids 295 



steam 298-305 



water 297 



Latitude, photographic 341 



variation 602 



Laue's equation, electron emission 547 



Least squares : formulae 59 



probability integral, arg. hx 56 



x/r 57 



inverse 60 



0.6745 Vi/(n— 1) 57 



o.6745 Vi/n(n— 1 ) 58 



0.8453V1/71U— 1) 58 



0.8453 [i/nVn— 1] 58 



probable errors 57~59 



Leather belting, mechanical properties 130 



Leduc thermomagnetic effect 482 



Legal electrical units xlvi 



Length standards xxxiv, 5 



Light: flux 333 



intensity on various days 556, 608 



lambert 333 



lumen 333 



