INDEX 



789 



Alpha particles — continued 



relative stopping power of selected sub- 

 stances, 684 

 velocity, 672 

 Alpha-ray spectra, artificial radioactive sub- 

 stances, 682 

 natural radioactive substances, 681 

 Altitude, by barometer, 613 

 Aluminum: alloys, properties, 192 

 atomic weight, 619 

 boiling point, 117 

 conductivity, 404 

 mechanical properties, 192 

 melting point, 117 

 oxide, 162 

 solder, 223 

 wire, 414 

 Alums, 521 



index refraction, 521 

 American candle (see Photometry), 94 



after 1948, 94 

 Ammonia: compressibility, 266 

 hydrolysis, 399 

 latent heat of vaporization, 167 



pressure variation, 167 

 liquid, density, 178 

 heat content, 162, 178 

 latent heat, 178 



pressure variation, 167 

 pressure effects, 167 

 properties, 178 

 specific heats, 178 

 thermal properties, 162 

 Ampere, 20 

 Ampere-turn units, 18 

 Amu, 21 

 Angle, 4 

 Angstrom, 4, 63 

 Angular acceleration, 4 

 Angular momentum, 4 

 Angular velocity, 4 



earth, 729 

 Antenna arrays, 434 

 Antifreeze solutions, 135 

 Aphelon, 729 

 API scale, 290 

 Apostilb, 93 



Apothecary mass unit, 63, 64, 66 

 Aqueous solutions, 300-305 

 density, 300-305 

 diffusion into water, 354 

 Arcs (see under name of) 

 Area, 4 

 Argon: compressibility, 264 



melting point vs. pressure, 117, 118 



parameters, 117 

 volume-pressure, 118 

 Artificial disintegration, 653, 669, 706 

 bombardment, 669, 670 

 alpha-ray, 669 

 deuteron, 669 

 neutron, 667, 669 

 photonuclear, 669 

 products, 669 

 proton, 669 

 interesting results, 652, 669 

 methods of producing elements beyond 

 uranium, 670 



Artificial disintegration — continued 

 parts, 706 

 pile yields, 670 

 results of, 666-670 

 Artificial radioactivity, 667 



slow-neutron-produced, 667 

 Asbestos, thermal conductivity, 139 

 Astronomical units, 729 

 Astronomy, 728 

 albedos, 737 



planets, 737 

 calendars, 728, 732, 733 

 equation of time, 728 

 Julian day, 733 

 perpetual, 732 

 clouds of Magellan, 746 

 constellation abbreviations, 743 

 craters, 736 

 lunar, 736 

 terrestrial, 736 

 data, miscellaneous, 729 

 day (see also under Definitions), 729 



change of, 780 

 definitions, 729 

 earth, 734, 741 

 age, 741 



strata, 741 

 diameter, 729 

 dimensions, 729, 734 

 distance, to moon, 730 

 to sun, 730 

 ' interior, characteristics, 739 

 density, 739 



with depth, 739 

 elastic constants, 740 



rocks, 740, 741 

 pressure, 739 

 temperature, 727 



velocity, earthquake waves, 739, 740 

 mass, 729 

 orbit, 729, 734 

 physical data, 729 

 precession for 50 years, 738 

 quake waves, 739 



velocity in ocean, 777 

 rigidity, 740 

 rotation, 729, 780 



variation, 780 

 satellites, 734 

 strata, 741 

 temperature, 734 



various places, 726 

 velocity, earthquake waves, 739 

 viscosity, 729 

 galaxies, local family, 748 

 our galaxy, 713, 770 

 center, .770 

 rotation, 770 

 stars, mass, 713 

 number, 713 

 interstellar space, 771 

 matter, 629, 771 

 temperature, 763 

 Magellanic clouds, 746 

 moon (see also Moon), age, 741 

 nebulae (see also under stars), classifica- 

 tion, 758 

 nebulae lines, 745 



