820 



SMITHSONIAN PHYSICAL TABLES 



Solids, compressibility, 286 



contact difference of potential, 637 

 dielectric constant, 427 

 electron emission, 635, 636 

 infrared reflection, 548 

 infrared transmission, 547 

 specific heat, 155-158 

 velocity of sound in, 306 

 Verdet's constant, 504 

 Solubility, 357 



gases in alcohol, 360 



gases in water (temperature variation), 



358, 360 

 inorganic salts (temperature variation), 



357 

 organic salts (temperature variation), 358 

 organic solvents, 359 

 pressure effect, 359 

 vapors, 360 

 alcohol, 360 

 water, 360 

 Solutions, density, 300-305 



molecular conductivity, 398, 399 

 Solvents, organic, 359 



boiling point, 359 

 Sound (see also Acoustics), 309-317 

 acoustics, architectural, 315 



attenuation coefficient vs. humidity, 316 

 reverberation time, 315 

 and frequency, 317 

 as function of volume, 317 

 calculated, 315 

 optimum, 316 



and volume of room, 317 

 bel, 309 

 consonants, frequency of occurrence, 309 



power, relative, 309 

 decibel, 309, 314 



ear sensitivity to: binaural, 314 

 differential, 314 

 frequency range, 314 

 monaural, 314 

 threshold, 314 

 fundamental frequency, female voices, 310 



male voices, 310 

 hearing acuity: and frequency, 314 

 loss by groups, 315 

 thresholds, 314 

 levels, various locations, 309 

 musical: power peak, various instruments, 

 310 

 range frequency, orchestral instruments, 



311 

 scales, 312 

 cent, 312 



equally tempered, 312 

 frequency and piano key numbers, 313 

 frequency ratios, two scales, 312 

 intervals, 312 

 just, 312 

 semitone, 312 

 noise levels, various locations, 309 

 pressure levels, 309 

 pressure unit, 309 

 sensitivity of ear, 314 



Sound — continued 

 speech : 



consonants, 309 



frequency of occurrence, 309 

 relative power, 309 

 power, 309 

 men, 310 

 women, 310 

 pressure field around head, 313 

 vowels, frequency of occurrence, 309 

 relative power, 309 

 resonance values, 311 

 velocity: 

 in air, 306 



for various densities and heights, 594 

 in gases, 306 

 in liquids, 307 

 in sea water, 307 

 in solids, 306 

 in vapors, 306 

 Spark in air, voltage required vs. distance, 

 421-423 

 ac, 421 

 dc, 421 

 Specific gravity, 291 

 API, 290 

 Baume scale, 289 

 Specific heat, 9, 155 

 aluminum oxide, 162 

 ammonia, liquid, 162 



saturated, 162 

 at fusion, 157 

 atomic, 160 

 electricity, 379 

 elements, 155 

 formula for (true), 157 

 gas, 163 



ratio, 164 

 hydrocarbons, light, 293 

 liquids, various, 161 

 materials, various, 158 

 mercury, 161 

 metals, 157 

 minerals, 162 

 rocks, 162 

 silicates, 164 

 solids, various, 158 

 true, 157 



temperature, 157 

 vapor, 163 

 water, 161 

 Specific inductive capacity {see Dielectric 



constant), 11 

 Specific intensity of magnetization, 461 

 Specific luminous radiation, 93 

 Specific susceptibility, 451 

 Spectra: 



alpha ray, 681 

 artificial, 682 

 natural, 680, 681 

 atomic, series relations, 578 



energy state, 581 

 beta ray, 653 

 blackbody, 95 

 Bohr atom, 579 



