824 



SMITHSONIAN PHYSICAL TABLES 



Units — continued 

 choice of, 1 

 common, 56 



abbreviations, 56 

 spelling, 56 

 conversion (see Conversion factors) 

 cubic, 63 



defined (see under name of unit) 

 derived, 2, 58 

 dimensions, 58 

 electrical and magnetic, 59 

 geometric and heat, 58 

 different systems, 15 



absolute, electric and magnetic (1948), 

 19 

 relation to international (1927), 20 

 ampere turns, 18 

 cgs, 15, 20 

 electrical, 10 



dimensional equations, 11, 59 

 equivalents of discarded systems, 22 

 relative value of 3 systems, 20 

 Gaussian, 15 

 heat, 58 



dimensional equation, 58 

 flow, 136 

 international electrical, 19 

 magnetic units, 451 

 ampere turn, 18 

 Gauss, 18 

 Gilbert, 18 

 Maxwell, 18 

 Oersted, 18 

 ordinary, 18 

 pole, 12 

 practical, 16 

 some proposed, 15 

 MKS, 15 

 dimensional formulas, 2, 58, 59 



use of, 2, 57 

 dimensions, 58, 59 

 electric, 10, 15 



absolute (1948), 19 

 maintained, 19 

 vs. international, 20 

 electromagnetic, 12 



practical, 16 

 electrostatic, 12 

 energy, 17, 618, 653 

 established, 2 

 extensive, 1 



former electrical equivalents, 22 

 fundamental, 1, 56, 60 

 area, 60 

 capacity, 60 

 choice of, 2 

 dielectric constant, 1 

 dimensions, 57-59 

 heat, 58 

 length, 1, 60 



magnetic permeability, 10, 451 

 mass, 60 

 number of, 2 

 temperature, 1, 14, 70 



scale of 1948, 70 

 time, 14 

 volume, 2, 60 

 Gaussian system, 15 

 geometrical, 4 

 heat, 7 



Units — continued 

 intensive, 1 

 legal definitions, 60 

 linear, 60 

 list of, 56 

 magnetic, 18, 451 

 mass, 60 

 measurements, 1 



numeric, 1 



unit, 1 

 mechanical, 4 

 metric, 61, 62 

 MKS, 15 

 number of, 2 

 numerically different, 15 

 photometric, 94 

 proposed systems, 15 

 radiant energy, 136 

 radiant wavelength, 509 

 relations among wire size units, 404 

 resistivity, 11 

 square, 60 



transformation of, 1, 57 

 Universe: 

 abundance of elements, 625 

 cosmic rays, 713 

 mass density, 713 

 radiant energy, 713 

 Uranium: 



elements beyond, 619, 623, 670 



americium, 619, 670 



berkelium, 619, 670 



californium, 619, 670 



curium, 619, 670 



methods of producing, 670 



neptunium, 619, 670 



plutonjum, 619, 670 

 radioactive properties, 676, 677 

 Uranus, 734 



Valence electrons, 654 

 Value of e, 47, 51, 54 

 Van de Graff generator, 654 

 Van der Waal's equation, 261 



constants for different gases, 262 

 Vapor pressure: 



alcohol, ethyl, 370 

 methyl, 370 



argon, 117 



critical, 276 



diffusion, 354, 355 



elements (some), 362 



ethyl alcohol, 370 



gases (low temperature), 360 



hydrocarbons, light, 293 



liquids, 371 



organic, 368, 371 



mercury, 372 



metals, 362, 363 



rate of evaporation, 362, 363 



methyl alcohol, 370 



organic liquids, 368 



rate of evaporation, 362 



solutions of salts in water, 373 



temperature effects, 368, 369 

 Vaporization, latent heat of, 167 



ammonia, 167 



elements, 165 



formula for, 167 



