INDEX 



675 



PAGE 



Resistance, electrical: mercury, f(p) 412 



resistance stand- 

 ards xlvi et seq. 



metals, f(t) 409 



porcelain, f(t) 419 



pressure effect 412 



quartz, f (t) 419 



standards, mercury. .. .xlvi et seq. 



surface, of dielectrics 418 



thermometer, platinum resis- 

 tance 242 



volume, of dielectrics 418 



wire, auxiliary table for com- 

 puting 408 



tables: 



aluminum, common 



units 429 



aluminum, metric 



units 430 



copper, common 



units 423 



copper, metric 



units 426 



thermal 279 



tungsten 32 1 



Resolving power, photographic plates, definition . . 343 

 vs. various devel- 

 opers 345 



vs. various plates . . 345 



Resonance spectrum lines 504, 511 



Retina: flux density at 332 



physiological data 332 



sensitivity to light and colors 330-332 



Right ascension, declination to alt. -azimuth 602 



galactic coordi- 

 nates 604-605 



Rigidity moduli no et seq. 



of earth 569 



Rise of boiling point by salts in solution 269 



Robinson cup anemometer, corrections 197 



Rock salt, refractive index, f (t) 360 



Rocks, specific heats 292 



Rods in retina of eye 332 



RGntgen (X) rays: absorption 543. 544 



coefficients (mass), 



M-/P S45 



limits, critical. 538-541 



lines 538 



cathode rays 536-537 



characteristic 537-538 



efficiency of pro- 

 duction 542 



chemical combination effect... 544 



continuous spectrum 537 



critical absorption limits. . .538-541 



crystals, lattice constant 543 



efficiency, production of char- 

 acteristic 542 



emission 537 



energy in continuous spectrum. 537 



relations 543 



fluorescence 543 



K group 538-540 



L group 538-540 



lattice constants of crystals... 543 



M group 541 



mass absorption coefficient /i/p. 545 



A/P 545 



photographic effects 546 



scattering 544 



spectroscopy of 543 



Roots of Bessel functions, 1st, 2nd orders 70 



, square 1 5-23 



Rope, manila, mechanical properties 131 



steel wire, " " 115 



Rotation of earth, changes in 573 



polarized light 396 



, magnetic 476 



stars 642 



Rotational energy of earth 57o 



Rowland solar wave lengths (St. John) 350-352 



Rubber, mechanical properties 130 



Rupture, modulus of no et seq. 



Russell diagram (stellar) 021 



Rutherford atom 492 



Rydberg constant 95. 494 



formula 503 



PAGE 



a, (Stefan-Boltzmann), 5.735X 10- 5 erg • cm -2 - 



deg.- 1 • sec.- 1 i<, 4 



Sackur-Tetrode constant 107 



Salt solution: lowering freezing point .'267-268 



rise of boiling point 269 



thermal conductivity 276 



rapor pressure 230 



viscosity 222 



Sand, reflectivity 381 



Satellites , , 6 6 



, diameters 606 



Scale, international temperature 239 et seq. 



musical 192 



Schott-Jena glasses, dispersion, i(t) 359 



Schroedinger constant 106 



Scleroscope hardness test n 



Screens, color 384 et seq. 



Sea: area (see also ocean) 569, 650-651 



chemical properties .' 652 



depths 569, 650-65 1 



level, net 574 



physical properties 651-652 



tides 573-574 



waves 653 



Secohm, definition 660 



Seconds pendulum, length = f (1st), formula 568 



Seismic waves 653 



Sensitivity of the eye: adaptation rate '. 331 



color 332 



differences 332 



contrast 331 



flicker 332 



glare 331 



minimum energy for light 



sensation 335 



photometric 331 



threshold 330 



plates and films, f(wave length) 343-344 



Sensitometric constants, photographic 341 



Series: mathematical (formulae) 13, 14 



spectrum: atomic relations 502 



Bohr-Hund notation 502, 504 



elements 355 



forbidden combinations 502 



hydrogen series 495 



limits 502 



molecular 51 2-5 1 3 



multiplicities 502 



parity 502 



persistent lines, arc 509 



spark 510 



raies ultimes 507 



resonance lines 511 



terms 506 



ultimate lines 507 



Sharpness, photographic 343 



Sidereal day, month, year 601 



Silica, properties of vitreous 654 



Silver: electrochemical equivalent 87, 431 



mechanical properties 124 



voltameter xlviii 



Silvite, refractive index 360 



Sines, natural and logarithmic, circular 32-37 



hyperbolic 41-47 



Size of organic molecules 551 



Skin friction (aerodynamics) 203 



Skip distance (wireless) 462 



Sky brightness, candles/cm a 339 



radiation 611 



Slug 660 



Snow, charge on 598 



reflecting power 381 



Solar (see under sun) 



Solar system : albedos 607 



Bode's law 607 



planets, miscellaneous data 606 



satellites, " " 606 



Solder, aluminum 124 



Solids : compressibility 156 



conductivity (see resistivity) 



densities 159, 161-164 



dielectric constants 446 



expansion coefficients, cubical 282 



linear 280-281 



hardness 137. 1 10 et seq. 



masneto-optic rotation 477 



