INDEX 



801 



Elements — con tinned 

 melting points, 117 



standards, 9, 117 

 number 1952, 651 

 optical constants (metals), 558 

 periodic system, 621 

 physical properties, 189 

 Poisson's ratio, 227 

 radii, electron orbits, 624 

 resistivity, 384 



temperature coefficient, 384 

 specific heat, 155, 160 



formula for, 157 



true, 157 

 spectroscopic properties: neutral atoms, 

 582 



singly-ionized, 584 

 symbols, 117 



thermal conductivity, 138 

 thermal expansion: crystals, 145 



cubical, 148 



linear, 145 

 vapor pressure, 362, 363 

 Emf (thermal), alloys vs. lead, 379 

 alloys vs. platinum, 381 

 aluminum vs. platinum, 376 

 batteries, 377 

 cadmium vs. platinum, 383 

 low temperature, 381 

 metals, in solution of salts, 378 



vs. platinum, 381 



vs. silver alloys, 381 



vs. zinc solutions, 377 

 nickel, vs. copper, 381 



vs. platinum, 389 

 platinum-rhodium vs. platinum, 381, 387 

 vs. lead, 379 

 zinc vs. platinum, 390 

 Emissivity, 8, 98 

 spectral, 8, 98 



alloys, 99 



correction to brightness temperature, 99 



liquids, 98 



materials, 98 



metals and oxides. 101 

 at melting point, 98 

 out-gassed, 99 



molybdenum, 103 



solids, 100, 101, 102 



tantalum, 103 



tungsten, 99, 102 

 total: glass, 100 



materials, 100 



metals, 101 



at low temperatures, 101 



oxides, 101 



relative, 100 

 Emu, 20 

 Energy, 5, 17, 21 



blackbody radiation, 79, 85, 96 



bond, 633 



conversion factors, 20, 21 



cosmic ray, 712 



dissipation in cycle (magnetism), 460 



electron-volt, 49 



levels, 581 



losses, magnetic, 459, 460 



Energy — continued 



radiant, 9, 79 



radiated by a number of radioactive ma- 

 terials, 689 



temperature for 1 ev, 55 



transformer steel (losses), 459 



units, 21, 653, 618 



conversion factors, 21, 618 

 Enthalpy, 8, 270 

 Entropy, 8, 270 

 Equation of time, 728 

 Erg, 5 



Erichsen value, 187 

 Error, probable, 37 

 Esu/emu, 48 



Ether, volume-pressure, 283 

 Ethylene, 265 

 Ettinghausen effect, 507 

 Eutectic mixtures, 130 

 Ev, 618, 653 

 Evaporation of metals, 363 



formulas, 363 



constants (various metals), 364 



rate of, 363 

 Expansion (thermal), 145 



cubical, 148 



linear, 145 

 Experimental data (see also under Data), 

 • 37-40 

 Explosives, 183 



analysis, 184 



chemical properties, 184 



ignition temperatures, 183, 634 



physical properties, 184 



pressures, 634 



time of heating, 183 

 Exponential formulas for mass absorption 



values, elements, 694 

 Exponential functions, 43 

 Exposure, photographic, 562 

 Eye: as measuring instrument for radia- 

 tion, 87 



blind spot, 90 



contrast sensibility, 89 



diameter of pupil, 90 

 and flux density, 90 



distribution coefficients, 91 



glare sensibility, 89 



I.C.I, standard observer, 90, 91 

 distribution coefficients, 91 



instantaneous thresholds, 88 



luminosity factors, 87 

 and brightness, 88 



macula lutea, 90 



minimum energy to produce sensation, 89 



miscellaneous data, 90 



physical properties, 90 



Purkinge effect, 87 



rate of adaptation, 89 



relative luminosity factors, 87 

 various brightnesses, 87, 88, 89 



sensitivity, 87, 89 



standard observer, 90 



distribution coefficients, 91 



thresholds, 88 



various field brightness, 88 



vision, persistence of, 90 



visual range for white light, 92 



