INDEX, 



449 



PAGE 



Distance of the stars, nebulae and clusters .... 412 



Dyes, transparency of 301 



Dynamical equivalent of th';rmal unit i97 



e (base of natural logarithms) 14 



6 (elementary electrical charge) 408 



e/m 40S 



C, e-^, and their logarithms a;=otoio. . . . 48 



X fractional ... 56 



gi2^ g_i? a!=o.i to S-o • • 54 



T IT 



-X, --X 

 e^* e 4 x=\ to 20 . . . 55 



B~^^, e ^4 x=i to 20 ... 55 



gx+e-^ e^-e--^ ^^^ ^^gj^ logarithms 41 



2 2 



Earth: atmospheric data 421 



conductivity, thermal 422 



degrees on, length of 416 



elements, percentage composition 423 



geochemical data 423 



geodetical 424-427 



moments of inertia 427 



moon, distance of 414 



rigidity 427 



size of, shape of ., . . . 427 



spheroid constants 427 



sun, distance of 414 



temperatures 420, 422 



viscosity 427 



Efficiency of various lights 262 



Elastic limit (see mechanical properties) .... 74 

 Elastic modulus of rigidity, —temp, variation . . 100 



Elasticity (see mechanical data) 74 



crystals 102, 103 



Young's modulus (see mechanical prop.) 74 



Electrical charge, elementary 408 



E'ectrical equivalents 3ii 



Electrical units: international xxxvi 



standards .... xxxviii 



practical xxxvi 



Electric lights, etflciency of 262 



Electric, tribo-, series (frictional) 322 



Electrochemical equivalents 345, 346 



silver 345 



Electrolytic conduction: ammonium acetate .... 352 

 equivalent conductance 345-346 



hydrolysis 352 



ionic 352 



ionization water .... 352 



solutions 345-346 



spec, molecular .... 347 

 limiting value 11 . . 348 



temp, coef 348 



Electro-motive force: accumulators 313 



contact 314,316,404 



Peltier 321 



standard cells 313 



thermo-electric .... 317—320 

 pres. effect . 320 



voltaic cells 312-313 



Weston normal xli 



Weston portable xliii 



Electromagnetic system of units xxxl 



Electromagnetic/electrostatic units=v . . . xxx, xxxvi 



Electrons: — , + 401 



affinity of elements 404 



e/m 404 



elementary charge 404 



emission from hot bodies 403 



ionization potentials 403 



mass 408 



photo-electric effect 403 



radius 408 



resonance potentials 403 



work required to remove 403 



Elements: atomic heats at 50° K 226 



atomic numbers 409 



atomic volumes 226 



atomic weights (international) .... 71 



boiling points 199 



compressibility 108 



conductivity electrical 323—326 



thermal 213 



densities no 



earth's crust, occurrence in 423 



PAGE 



Elements: evaporation rate, Mo, W, Pt 175 



expansion, cubical (gaseous) 222 



linear (solid) 218 



hardness 73, 10 1 



isotopes 410 



latent heat of evaporation 233 



melting points 198 



meteorites, occurrence in 423 



Peltier effect 317,320—322 



periodic system 409-410 



resistance, electrical 323-326 



specific heats 223, 225 



spectra 266-270 



thermal conductivities 213 



expansion 128, 222 



thermo-electric powers 317,319 



Thomson effect 317,320 



valencies 71 



vapor pressures 175 



Elementary electric charge 408 



Elements, magnetic, at various observatories . . .434 



Elliptic integrals 69 



Emanation (radioactive) 398 



Emissivities, radiation 249, 250 



Energy kinetic, definition 428 



of molecule 408 



Energy, minimum visible to eye 261 



solar, data relating to 41S— 420 



of candle radiation 260 



of sound waves 149 



Entropy constant (Boltzmann) 408 



Entropy of steam 234-240 



Equation of time 416 



Etiuilibrium radioactive 394 



Equivalent, electrochemical 345—346 



mechanical, of heat 197 



Erg 435 



Erichson values 73 



Errors, probable 57-59 



Ettingshausen effect 385 



Butectic mixtures, melting points 206, 207 



Evaporation rate of. Mo, Pt, W 17s 



Expansion, cubical: gases 222 



liquids 221 



solids 220 



linear: elements 218 



miscellaneous 219 



Explosives: decomposition, ignition temp 244 



miscellaneous 243—244 



Exponential functions : see index under e 41-55 



diffusion integral 60 



gudermanians 41 



hyperbolic functions (nat) . 41 

 hyperbolic functions (logs) . 41 

 probability integral . . . 56-57 



Eye: adaptation rate 257 



color sensitiveness 256—258 



contrast sensibility 257 



Fechner's law 258 



glare sensibility 257 



heterochromatic sensibility 257 



minimum energy visible 261 



miscellaneous data 258 



persistence of vision 258 



pupil size for various intensities 258 



Purkinje phenomenon 256 



sensitiveness to light 256-258 



small dif. of color, sensitiveness to 258 



threshold sensitiveness 256 



visibility of radiation, relative 258 



Factorials : 7 function, n=i to 2 62 



n !, n= I to 20 47 



logs, n=i to 100 40 



Falling bodies (Stokes' law) 150 



Farad 311 



Faraday xliv, 311,345 



Faraday constant 408 



T'echner's law 258 



Ferromagnetism 365 



Field, magnetic: earth's, components .... 428-434 

 metals, behavior of in . . . 365—377 



resistance of metals in 384 



rotation of plane of polarization . 378 

 thermo-galvanometric effects . .385 



Filaments, heat losses from 255 



Flame temperatures 244 



Fluidity iss 



