INDEX 



807 



Inductance — continued 

 self-, 13 

 standards, 17 

 Inertia: moment of, 27 



photography, 562 

 Infrared reflectivity: solids, 548 



tungsten, 555 

 Infrared transmission, 545 

 air, moist, 546 

 crystals, 545 

 gases, 547 

 solids, 547 



various substances, 546-547 

 Inorganic compounds: boiling point, 120 

 density, 120 

 melting point, 120 

 solubility, 357 



and temperature. 357 

 Insulating materials: electrical properties, 

 429 

 values: of dielectric constant, 429 

 of power factor, 433 

 Integrals, 23 



Intensity: magnetic (see also under Geo- 

 magnetism) , 478 

 of magnetization, 12 

 Interior friction at low temperatures, 227 

 International date line, 729 

 International electrical units, 16 

 Interstellar gases, 629 

 Interstellar matter, 629 

 Interstellar temperature, 763 

 Inverse square law (photometric), disk or 



source, 95 

 Ionic crystals, lattice spacings, 647 

 Ionic equilibrium, atmospheric, 615 

 Ionic radii, 648 



Ionization: energy, production of ion pair, 

 711 

 gamma rays, 711 

 potentials, elements, 582 

 neutral, 582 

 singly ionized, 584 

 water, 399 

 Ions: equilibrium in atmosphere, 615 

 equivalent conductivity, 399 

 gaseous, diffusion coefficient, 644 

 mobility, positive, 644 

 singly charged, 645 

 heat of formation, 186 

 mobility, in noble gases, 644 



of singly charged, 645 

 positive, mobilities, 644 

 Iron: arc lines, 571 



magnetic properties, 452-456 

 cast, in intense fields, 464 

 in very weak fields, 452 

 soft, 458 

 mechanical properties, 209 

 permeability, 458 

 resistivity, 384 

 spectral lines, 571 

 Irradiancy, 79 

 Isobar, 653 

 Isomer, 654 

 Isotope, 654-655 



abundance, relative, 655 



Isotope — con tinned 

 atomic weight, 658 

 characteristics, 655, 658 

 gamma-ray energy, 686, 687 

 lead, 679 

 life, 667 



magnetic moment, 658 

 masses, 658 



nuclear magnetron, 662 

 number, 655 

 pile yields of, 670 

 quadrupole moment, 658 

 radioactivity: artificial, 655 



natural, 655 



number, 655, 658 

 spin, 658 

 table of, 655, 658 



Jena glasses, 513 

 Joule, 5, 20 



Joule's equivalent, 8, 47 

 Joule-Thomson effect, 278 



air, 278 



argon, 279 



carbon dioxide, 280 



helium, 278 



mixtures, of helium an.d argon, 280 

 of helium and nitrogen, 281 



nitrogen, 279 

 Julian day: calendar, 733 



number (days), 733 



period, 730 

 Jupiter, 734 



K. Boltzmann constant, 49, 52. 54 

 K-wavelength series (see also under 



X-rays), 697 

 Kelvin temperature scale, 9, 14 

 Kerosene: density, 295 

 dielectric constant, 425 

 dielectric strength, 422 

 discharge in, 422 

 viscosity, 322 

 Kerr constant, 507 

 Kerr effect, dispersion. 504, 508 

 Kilodyne, 5 

 Kilowatt-hour, 21 

 Kinematic viscosity, 318 

 Kinetic energy, 6 

 Kinetic theory, 638 



mercury vapor: mean free paths, 638 



molecular diameters, 638 

 molecular constants, 640 

 molecular diameters, 638, 642 

 molecular distribution laws, 639 

 molecular energies, 639 

 molecular velocities, 639, 640 

 molecules: 



gases: mean free path, 638 

 molecular diameters, 638 

 viscosity, 642 

 masses, 640 

 mean free path, 641 

 number of, 638 

 pressure, 638 

 rate of evaporation, 639 



