674 



INDEX 



PAGE 



Radioactivity: a (alpha) particles: 



atomic stopping powers for.... 523 



constants, miscellaneous 5 2 * 



ionization 522 



total in various 



gases 525 



long-range 523 



molecular stopping powers 523 



range 5 2 2 



velocity 522 



actinium family: average lives 516 



decay constant ... 516 



period, J values. . . 516 



average lives 51 6-5 1 9 



/3 (beta) rays 526 



absorption coefficients 



(air, C0 2 ) 528 



range, effective in a 



few elements .... 528 



work of extraction... 527 



constants, various 5-=o, 521 



Curie • S 2 o 



decay values 516-519 



emanation 5 2 o 



7 (gamma) rays 5 2 9 



absorption, Al, Pb. 532 

 characteristic, X 



and energy. 533, 534 



crystal reflection. . . 534 



emission of 529 



energy of ....529, 533 



ionization 530 



nuclear analysis by. 5 30 



energy ... 534 



scattering 531 



secondaries 531 



wave lengths 529 



H particles 524 



heat effects, Ra+Em 525 



ionium family: average lives 517 



decay constants .... 517 



periods, i values. ... 517 



lives, average 51 6-5 1 9 



miscellaneous constants 520-521 



periods, A values 516-519 



phosphorescence 321 



potassium 519 



radioactive equilibrium 534 



radium and products {see ionium 



family) Si' 



radon 520 



rubidium 519 



thermal activity (Ra+Em) 525 



thorium : average life 519 



decay constants 519 



periods, £ values 519 



units, miscellaneous, constants. .520-521 



uranium family: average life 516 



decay constants ... 516 



periods, J- values. . . 516 



vapor pressure, Ra emanation 521 



Radium: average life, decay constants, \ period.... 517 



emanation, vapor pressure. . .. 521 



heat generated (plus emanation) 525 



phosphorescence 521 



Radius of curvature of space 644 



Radon 520 



Raies ultimes 504, 507-508 



Rain, electrical charge on 598 



Range table (wireless) 462 



Reamur 660 



Reciprocals 1 5-23 



Reflection: angle, variation with 382 



building materials 383 



diffuse, miscellaneous 379 



Hn, i) 376 



formulae, Fresnel 376 



glass surfaces 376 



metals 377-380 



photographic plates 345 



pigments 381 



polarization by 376 



powders 382 



rough surfaces 381 



sand, snow 381 



stellite 378 



tungsten 380 



PAGE 



Refraction: astronomical 602 



index; air, 15° C, 76 cm 374 



alums, various 362 



crystals: biaxial, miscellaneous.. 370 



negative 368 



positive 367 



isotropic, (monore- 



fringent) 363 



uniaxial, miscellaneous. 366 



negative .... 365 



positive .... 365 



fats 370 



fluorite, f(t) 361 



gases 373 



glasses: American, dispersions .. 358 



effect of composition... 356 



Jena, dispersion 359 



f(t) 359 



nx— n D, n c/— n D 356 



«jp— n c 357 



Iceland spar 361 



liquefied gases 370 



liquids, miscellaneous 370 



relative to air 371 



media for microscopic determina- 

 tions 375 



minerals {see under crystals 

 above) 



nitroso-dimethyl 361 



oils 370 



potassium permanganate, aqueous. 372 



quartz: amorphous 362 



crystal 362 



rock salt, temperature variation. 360 



salt solutions 372 



sea water 652 



silica 312 



solids 364 



standard media 375 



sylvite, KC1 360 



vapors 373 



water, sea 652 



waxes 370 



Relative humidity: vapor pressure, dry' reading 236 



wet and dry reading 238 



visibility of radiation 332 



Relativity correction, Bohr atom 494 



mass 492 



Resinoid, physical properties 655 



Resistance, air 195-203 



of cylinders 200, 202 



fiat plates 198-199 



miscellaneous bodies 201 



spheres 201 



skin friction 203 



electrical: {see also under conduc- 

 tivity) 

 alloys, pressure coefficient . . 412 

 temperature coeffi- 

 cient 409, 414 



tension effect 413 



alternating current values, 



Cu wire 449-451 



aluminum, mass and volume. 421 

 wire tables: 



English units. 429 



metric " . 430 



antennae (wireless) 452 



auxiliary computation table. 408 

 copper, correction to standard 



temperature 422 



copper wire tables, 



English units 423 



metric " 426 



dielectrics, solid, surface... 418 



electrical equivalents 397 



glass, f(t) 419 



high-frequency values 449 



alt. to direct, ratio. 451 



isolated tubes .... 450 



wires 450 



proximity factor . . 450 



low-temperature values.. 4 17, 433 



magnetic field effect 481 



manganin, f(p) 412 



