INDEX. 



(The new matter in the Appendix is not indexed.) 



PAGE 



K particles: energy of 396 



helium 394 



ions, produced 396, 398 



production of 394 



range 396 



stopping powers of substances . . . .395 



velocities, initial 396 



Abbreviations 2 



Aberration constant 414 



Absolute units xxxvi, 311 



Absolute zero of temperature i9S, 408 



Absorption coefficients: see transmission coef. 



/S-rays 393 



T-rays 395 



X-rays 389 



Acceleration of gravity 424-426 



Accumulators, voltage 3i3 



Actinium group of radioactive substances , ... 396 



Activity, definition 433 



Adaptation, rate of eye 257 



Adsorption, by charcoal 407 



by fine particles 407 



heat of 407 



Aerodynamical tables 1S0-153 



Agonic line 433 



Air: composition of; variation with alt. and lat. . .421 



density of moist i33-i33 



densities in air, reduction to vacuo .... 73 



dielectric strength 353 



humidity relative, via v. p. and dry . , . . 187 



via wet and dry 189 



Index of refraction 292 



masses 4^9 



moist, transparency, short \ 419 



Ions X 308 



transmission coefficients . . 308,418,419 



resistance, fluid 151—133 



sparliling potentials for 353—354 



thermal conductivity, high temperatures . . . 254 

 thermometer, comparison with 59m . . . . 193 



vapor pressure of water in 185-186 



viscosity 164 



wave-lengths in air, reduction to vacuo . . . 293 



Albedos 417 



Altitudes by barometer 145 



by boiling points of water 144 



Alternating current resistances 344 



Aluminum: mechanical prnpert'es 79-80 



resistivity constants 334 



wire-tables, English units 342 



Metric units 343 



Ammonia, latent and specific heats 228, 232 



Ampere equivalents 311 



Ampere turns xlvi 



Angstrom, wave-length unit 266 



Antennae, resistances 364 



Ai/tllogarithms, std. 4-place, p. 28; .9 to i.o . . 30 



Apothecaries weights 7,8 



Arc,, iron, lines 266-267 



Astronomical data 411-420 



Atmosphere: composition, alt. and lat. var 421 



density, altitude variation 421 



height of 421 



homogeneous, height of 421 



pressure, altitude variation 421 



"Atmosphere ": value of pressure unit . . . 421, 4;; 5 



Atmospheric water vapor 185-186 



Atom: Bohr 401 



Atom, hydrogen: mass, mean free path 408 



radius, mean velocity 408 



Rutherford 401 



Atomic heats, elements at 50° K 226 



magnetic field 401 



magnitudes 401,408 



numbers 409 



volumes, elements 2.16 



weights, international 71 



/8-rays, absorption coefficients 395 



absorption of 397 



ions produced by 398 



velocity 397 



Balmer series spectrum formula 275 



Bar, definition 435 



Barometer, altitude, variation with 421 



heights, determination of by .... 145 



reduction for capillarity 143 



to std. gravity .... 138-143 

 to std. temperature . . . . 137 



Batteries, composition, voltages 312-313 



Baume scale, conversion to densities 109 



Bessel functions, ist, 2d orders, roots 66-68 



Biaxial crystals, formulae, -|- refractive indices . . 286 

 — refractive indices . .287 



Black absorbers, long-\ transparencies 309 



Black-body: brightness (photometric) of 261 



luminosity of 261 



luminous efficiency of 261 



Planck's constant 247 



radiation, total, for vpjious temp. . . 247 

 by wave-lenths, var. temp. . 248 



Stefan-Boltzmann constant 247 



-temperature for C, Pt and VV . . . .250 



Bohr atom 275,401 



Boiling points: elements 199 



pressure effect . . ■. . . 200 



inorganic compounds 201 



organic compounds 203 



rise of, salts in HoO 210 



water,- pressure variation .... 144 



Boltzman gas-constant (entropy) 408 



Bougie decimale 260 



Break-down voltage, dielectrics 304, 355 



Brightness of sity 419 



of stars 413 



of sun 260, 413 



temperature of C, Pt and W 250 



of various illuminations 256 



of various light sources 260-262 



Brinell hardness 74 



British thermal unit 435 



British weights and measures 8-1 1 



Brownian movement 406 



Buoyancy correction: of densities 73 



weighings 73 



7-function 62 



7-rays: absorption coefficients 395 



absorption of 397 



ions produced by 398 



Cadmium line, red, X of intern, prim, std 266 



Calcite grating space 408 



Calibration points for temperatures 19 •; 



for thermoelements 196 



Calorie, definition 435 



Canal rays 386 



Candle, energy from 260 



international standard 260 



meter-candle, foot-candle 259 



Capacity of wires for electrical current 329 



Capacity, specific inductive: crystals 361 



gases, f(t, p) . . 356-357 



liquids 357 



liq. gases 359 



solids 360 



standard solutions . 360 



