678 



INDEX 



PAGE 



Steinmetz constant, magnetism 473 



Stellar temperature of space (see also stars) 645 



Stellite, mechanical properties ' 2 4 



optical " 37» 



Stem correction to thermometers 249 



Sterro-metal, mechanical properties 121 



Stones, building, mechanical properties 128 



Stopping powers: atomic, for a particles 523 



molecular, for a particles 523 



Strength of materials (see mechanical prop- 

 erties) 1 10 et seq. 



Striction, magneto 4I 3 



Sucrose, viscosities of aqueous 200 



Sugar, aqueous, densities J 74 



Sulphur dioxide, p. v. t. relations i4» 



Sulphuric acid, densities '74. *75 



heats of dilution 3 1 2 



Sun: apex of solar motion " 2 5 



brightness, candles per cm 3 339 



constants, decades, monthly and yearly 



means 6 ° 9 ~^ I a 



disk, energy distribution 60s 



distance to earth • • • • °° 1 



elements in atmosphere of 612, 613 



energy spectrum ,"V" <° 



Abbot-Priest, at sea-level... 614 



at Mt. Wilson 608 



Washington 608 



in u.-v., visible, i.-r 608 



outside earth 608 



parallax 6o1 



radiation (see also energy just above) 



at earth's surface 555 



atmosphere, at top of, f(month, lat.). 556 



atmospheric transmission of 555 



compared to moon 623 



ultra-violet 555 



-spot numbers. Wolf's, annual means 610 



stellar magnitude 623 



velocity ° 2 5 



wave length, i.-r. and u.-v., provisional 353 



solar, standard 350-352 



Sunshine, duration of 610 



Superconductivity, low temperature 655 



Supersonics ' Q 1 



Surface resistivities, solid dielectrics 418 



tensions, liquids 222, 223 



Surgical lamps, characteristics 339 



Susceptibility, magnetic, atomic, definition 463 



elements 475 



molecular, definition .... 463 



Synodical month 601 



Tables, mathematical: antilogarithms, 4-place ...28-30 



Bessel's functions 70 



circular " 32-40 



constants 14 



cubes 15 



cylindrical harmonics 68-70 



derivatives 12 



differentials 12 



diffusion integral 60 



elliptic integrals 71 



exponential function .... 48-64 



integral 62 



factorials, 1 to 20 47 



gamma function 64 



hyperbolic functions 41 



integrals 12 



least squares 56-59 



logarithms 24-27 



probability integral 56, 57 



inverse. 60, 61 



reciprocals 15 



series 15 



square roots 15 



squares 15 



zonal spherical harmonics. . . 66 



steam: o°-22o° C, saturated 298-303 



40o°-7oo° P., saturated 304 



2i2°-3ooo° P., superheated 305 



Tangents, circular, nat, logs., f(°, ') 35 



f (radians) 37 



hyperbolic, nat., logs 41 



Tantalum : radiation properties 323 



resistivity 323 



total radiation, f (t) 323 



PAGE 



Taylor's series 13 



Temperature: black-body scale for tungsten 322 



brightness, black body, f(T) 335 



scale for carbon 323 



tungsten ..321, 322 



various lights 338 



color scale for electric lights 338 



gas-filled tungsten 



lamps 338 



molybdenum 323 



tantalum 323 



tungsten 322 



various lights 338 



critical: gases 271 



magnetism 475 



earth's gradient with depths 557 



surface: mean monthly tem- 

 peratures over ... 556 

 mean yearly tem- 

 peratures over . . . 556 

 variation over sea and 



land 557 



electric lights 338 



flames 3 : o 



ignition, gaseous mixtures 310 



low, superconductivity of metals.... 433 

 melting: (see also melting 



points) 252-266 



lime-alumina-silica com- 

 pounds 266 



scale : calibration 241 



points (secondary). 243 



International 339 



thermocouple, standards 243 



thermoelement calibration . . . 244 



chromel-alumel 247 



Cu-constantan, >o° C. 245 



<o° C. 246 



Pt-PtRh 245 



stellar 617 



Tension, surface, liquids 222-223 



Tenth-meter-angstrom 660 



Terms: metastable 505 



series (spectroscopy) 5°6 



spectra 502 



Terra cotta, mechanical properties 129 



Terrestrial magnetism: agonic line, U. S., 1800- 



1925 595 



charts : 



isoclinic, I, world 576 



isodynamic, H, " 577 



isogonic, D, " 576 



isoporic: 



D, world 577 



H, " 577 



I, " 578 



total intensity, world. 580 

 vertical intensity, 



world 580 



constants of earth. .. .574, 575 

 declination, D, 



annual, world 579 



isogonic lines, world... 576 



isoporic " "... 577 



secular change, U. S. . . 590 



dip, I, annual change, world. 579 



f (lat., long.), U. S., 



1925 592 



isoclinic lines, world. 576 



isoporic " " 578 



secular change, U. S. 592 

 horizontal intensity, H, 



annual change, world.. 579 



f(lat., long.), U. S 593 



isodynamic lines, world. 577 



isoporic " " 578 



secular change, U. S... 593 

 inclination, I (see dip) 

 isoclinic lines, I, world 



chart 576 



isodynamic lines, H, world 



chart 577 



isogonic lines, D, world 



chart 576 



isoporic lines, 



D, world chart 577 



H, " " 578 



I, " " 578 



