Index 



Condensers for microscope 313 

 Conduction of heat 223 

 Congresses, reports 29 

 Conical refraction 382 

 Conservation of energy 238 



of solar energy 353 

 Consonance and dissonance 543 

 Constant temperatures, pro- 

 duction 151 



Constitution of matter, theo- 

 ries 79 

 Continuity of state 210 



of state : characteristic 



equations 209 

 Contrast colours 499 

 Convection of heat 232 

 Cooling, laws 233 

 Cornish steam engines 260 

 Corresponding states 213 

 Critical constants 210 



point 210 



state 211 



temperatures 211 

 Crystalline media, refraction 

 in 381 



reflection, theory 377 

 Crystals, dispersion in 382 



molecular theories 76 



refractive indices 386 



rings, brushes and colours 

 418 



selective absorption 395 

 Curvatures, measurement 94 

 Curved plates, vibrations 518 



Daguerreotype 460 

 Damping of sound-waves 533 

 Dark light, Le Bon's 481 

 Definition of optical instru- 

 ments 372 

 Density of gases, measurement 



110 



influence on refractive in- 

 dices 380 



influence on spectra 440 

 of liquids , measurement 111 

 measurement 110 

 numerical values 144 

 of solids and liquids, 



measurement 115 

 of solids, measurement 114 

 of vapours 205 

 of vapours, measurement 



115 



Determination of elastic con- 

 stants 133 

 of mechanical equivalent 



of heat 240 



of refractive indices 289 

 Developers (photographic) 457 

 Dialysis 66 

 Diathermancy 401 

 Dichroism 393 



Differential thermometers 160 

 Diffraction 367 



of Rontgen rays 473 

 by small particles 371 



Diffraction of sound 533 



spectra 371 

 Diffusion 68 



of gases 69 



of liquids 70 



of solids 72 

 Dioptrics of eye 485 

 Direct vision spectroscopes 343 

 Dispersion 292 



anomalous 389 



in crystals 382 



of heat rays 403 



rotatory 421 



theory 375 



Dissecting microscopes 319 

 Dissipation of energy 243 

 Dissociation 220 

 Dissolution, heats of 190 

 Distance of visible objects 491 

 Distribution of energy in spec- 

 trum 443 



of spectral lines 438 

 Divining rod 5 

 Doppler's principle 357, 527 

 Double refraction 383 



refraction in strained media 

 387 



refraction, theory 384 

 Drops 57 



Dulong and Petit law 188 

 Dust figures 232 



figures, Kundt's 520 

 Dynamical and mechanical 

 quantities, measure- 

 ment 86 



theory of reflection and 



refraction 375 

 Dynamometers 122 



Ear 549 

 Ebullition 206 

 Echelon spectroscope 346 

 Economics 36 



Efficiency of steam engines 260 



Effusion of gases 72 



Elastic constants, alloys 137 



constants, caoutchouc 133 



constants, determination 



133 



constants, determination, 

 methods and apparatus 

 138 



constants, glass 134 

 constants, ice 135 

 constants, iron 135 

 constants, metals 137 

 constants, steel 136 

 constants, threads and 



fibres 141 

 moduli 140 

 Electric clocks 105 



light photometry 280 

 radiation, reflection, re- 

 fraction and absorption 

 408 



radiations 481 

 tuning-forks 516 



Electrical thermometry 157 

 Electricity, history 6 

 Electrochemical processes, 



thermodynamics 252 

 Elements, spectra 431 

 Elliptic polarisation 415 



polarisation by metallic 

 reflection 388 



polarisation by reflection 



416 



Emission and analysis of ra- 

 diation, general 425 



of heat 444 



of radiation 442 



of radiation, law 444 



of Rontgen rays 474 

 Emissive power 442 

 Emulsion (in photography) 452 

 Endosmosis and exosmosis 66 

 Energy 443 



dissipation 243 



distribution in spectrum 443 



of sound-waves 535 



of sun-light 353 



of visible motion, measure- 

 ment 122 

 Engines 256 



gas 257 



heat 257 



hot air 258 



marine 261 



steam 258 

 Entropy 243 

 Equilibrium in coexistent 



phases 213 



Equivalents, refraction- 406 

 Ether 82 

 Evaporation 197 

 Exchanges, theory 445 

 Expansion of gases by heat 

 174, 177 



by heat 164 



of liquids by heat 170 



of solids by heat 165 



thermometry 154 



of unsaturated vapours by 



heat 179 



Exposure (in photography) 452 

 Eye, accommodation 486 



astigmatism 487 



construction 485 



defects 487 



dioptrics 485 



irradiation 488 



movements 486 



phenomena within 501 

 Eye-pieces 329 



Field glasses 311 

 Fine adjustment for micro- 

 scope 316 

 Flame spectra 430 

 Flames, sensitive 535 



singing 521 

 Fluid pressure, measurement 



129, 131 

 velocity, measurement 132 



II 



