796 



SMITHSONIAN PHYSICAL TABLES 



Cosmic rays, 653, 710 

 bursts, 711 

 characteristics, 711 



top atmosphere, 710 

 critical energy, 712 

 composition 



at geometric latitude 30°, 713 

 data, 712 



earth's magnetic field, 710 

 energy, 710 



critical, 712 



total, 712 

 entering atmosphere, 712 

 hard component, 711 

 ionization, 710, 711 

 intensity, 710 



50° geometric latitude, 712 



sea level, 711 



top atmosphere, 710 

 meson, 711 

 origin, 710 

 penetration, 711 



variation with latitude, 712 

 primary, 710 



characteristics, 710 



source, 710 

 radiation, composition and latitude, 712 



earth's surface, 712 



our galaxy, 713 



universe, 713 

 reaction, atmosphere, 711 

 secondary, 711 



hard, characteristics, 711 



intensity and altitude, 711 



earth's surface (sea level), 711 

 latitude, 710 



soft, 711 

 showers, 711 

 soft component, 711 

 source, 710 

 stars, 711 

 theories, 710 

 total energy, 710 

 variation, latitude, 710 

 Cosmos, 653 

 Cotangents, 32-36 

 Cotton, thermal conductivity, 139 

 Craters [see also Astronomy), 736 

 Critical constants: gases, 276 



light hydrocarbons, 293 

 Cross section (particle), 653 

 fission products, 709 

 fissionable nuclei, 708 

 organic molecules, 646 

 Crova wavelength, 96 

 Cryostats, liquids for (noninflammable), 183 



viscosity, 183 

 Crystals: artificial (optical), 515 

 biaxial, 529 



characteristics, 515, 529 

 compressibility, 287 

 cubic, 430 

 dielectric: constant, 430 



monoclinic, 431 



strength, 430 

 index of refraction, 516, 518-529 



temperature, 520 



Crystals — continued 



infrared, 516-527 



transmission (spectral), 517, 545 



inversion, 126 



ionic, lattice spacing, 647 

 radii, 648 



isotropic minerals, 522 



metals, interatomic distances, 648 

 structure, 648 



optical, 515-521 



orthorhombic, 430, 432 



phases, 126 



size, 515 



thermal expansion, 152 



transitions, reversible, 126 

 pressure, 126 



transmission, 517, 545 

 range, 515-545 

 spectral, 517-545 



types, 515 



uniaxial, 430 



uses, 515 

 Cubical expansion (thermal) : elements, 148 



gases, 154 



leather, 233 



liquids, 153 



organic, 153 



water, 153 

 Cubit, 4 



Curie (unit radioactive decay), 672 

 Curie constant for paramagnetic substances, 



461 

 Current, electric, 12, 20 



effect on human body, 375 

 Cyclotron, 653, 657 



Dalton, 5 



Data, experimental, 1-37 

 treatment of, 37-40 

 average deviation, 37 

 errors, 37 



equations for: least squares solutions, 

 38 

 linearly related quantities, 38 

 quadratic and other related quanti- 

 ties, 39 

 indexes of precision, 37 

 least squares: relations, 37-39 

 solutions, 39 

 terms, even, 42 

 odd, 42 

 tables, 41-43 

 methods of averaging, 37 

 modulus of precision, 37 

 precision constants, 37 

 average deviation, 37 

 probable error, 37, 43 

 reciprocal, 37 



modulus of precision, 37 

 relation of, 37 

 standard deviation, 37 

 Date, international line, 729 

 Day (see Astronomy), 729 



change of, 780 

 De Broglie wavelength, 653, 665 

 Debye unit, 441 



various particles, 441 



