Absorption of light, Appendix 376
Absorption of light, mechanism of 69
Achromatism of double object glass, theory of 63 350
Achromatism, practical investigations 337
Achromatism, test of, in telescope 357
Acids, action on quinine 328
Attraction, discontinuity at surface layer 281
Bessel functions of integral order 294
Bessel functions, applied to aereal waves 316
Bessel functions, relations between constants in expansions by 100 286
Biliverdin distinguished from chlorophyll 296
Blood, oxidation and reduction of 264 272
Cauchy, A.L., on double refraction 170
Cauchy, A.L., on metallic reflection 363
Chestnut bark, new constituent of 112 119
Chlorophyll, constitution of 237 247 260
Chromatic aberration, correction of secondary 348
Colours, body colour of loose powder 263
Colours, nature of compound 65
Colours, origin of natural colour 153 243
Complex integration along different paths 93 287
Convergence, limited, of series 80
Cooling, deformations due to rapid 234
Degradation of light 4
Diamond, reflection from 363
Diffracted light, determines direction of vibration 117
Diffracted light, polarization of 74
Discontinuity in constants occurring in expansions in series 80 282
Dispersion, false, of light by small particles in glass 244
Divergent series, discontinuity in use of 80 289
Double refraction, experimental test of its laws 336 337
Double refraction, report on theories of 157
Dynamical paradox explained 334
Elastic theories of the aether 157
Electric discharges, difference between the two electrodes 231
Electric discharges, optical constitution of 226
Electric telegraph, theory of signalling 61
Enclosure, radiation belonging to temperature 136
Equilibrium of gases in blood 274
Equipotential curves cross at equal angles 276
Eye, chromatic aberration of 59
Fluorescence as chemical test 256
Fluorescence of chestnut bark 110 119
Fluorescence, action of acids on quinine 13 327
Fluorescence, applied to spectrum 207
Fluorescence, connexion with absorption 258
Fluorescence, history of 18
Fluorescence, methods of observation 1 326
Fluorescence, preparation of screen 208
Fluorescence, striated in minerals 222
Fluorescence, theoretical 246
Foucault, L., on absorption of D lines 130 134 374
Fraunhofer, J., his achromatic combinations 63
Fraunhofer, J., on spectra 368
Fresnel, A., on double refraction 157
Fresnel, A., theory of pile of plates 145
Glasses, relation of optical quality to composition 339
Glasses, titano-phosphatic suitable for achromatizing objectives 356
Glasses, titano-phosphatic suitable for achromatizing objectives, but not titano-silicic 358
Gravity, theory of Harton pit experiment 70
Green, G., on elastic propagation and double refraction 172
Haematin 271
Haemoglobin 240
| Haemoglobin, its reactions 264
Haidinger, W., his brushes 60
Haidinger, W., letter to 50
Hankel, H., on Bessel functions 80
Harcourt, Rev. W.V., researches on glasses 339
Hydrogen atmosphere stifles sound 300
Hyposulphurous acid, nature of, tested by quinine 331
Kelvin, Lord (Thomson, W.), on beginnings of spectrum analysis 132 135 367
Kelvin, Lord (Thomson, W.), on cable telegraphy 61
Kirchhoff, G., on spectrum analysis 128 136
Limit, mathematical, approached different ways 88
MacCullagh, J., theory of double refraction 177
MacCullagh, J., theory of metallic reflection 363
Madder, optical analysis of 123
Mass, general distribution producing given external gravity 277
Metallic reflection of crystals 16 38 244
Metallic reflection of crystals, complementary to absorption 43 243
Metallic reflection of crystals, verified on absorption bands of permanganate 46 261
Metallic reflection, peculiarity of Newton’s rings by 361
Metallic reflection, silver transparent in ultra-violet 206
Miller, W.H., on coincidence of D and sodium lines 370 372
Newton’s rings by metallic reflection beyond the critical angle 361
Object-glasses, chemical correction of 344
Object-glasses, triple perfect achromatic 356 358
Optical properties as tests for organic bodies 238 249
Optical properties of glasses 339
Photographic lenses, correction of 344
Platinocyanide crystals, dichroic, polarized fluorescence 16
Platinocyanide crystals, solutions inactive 17
Polarization produced by pile of plates, theory 145
Polarized optical rings, peculiarity in photographs 30
Prisms, compensating, for investigating dispersion 341
Quinine, influence of various acids on its fluorescence 13 328
Quinine, metallic reflection of a salt of 19
Radiation, law of exchanges 129
Radiation, theoretical verification for internal radiation in crystals 137
Radiation, verified for polarized radiation of tourmaline 136
Realization of constant-temperature radiation 136
Series, semi-convergent, discontinuity in constants 77 282
Shadow-patterns 55
Solar eclipse, appearance at horns of crescent 325
Sounding-boards, necessity for 300
Spectroscope, curvature of images in 355
Spectrum analysis, history of 127
Spectrum analysis, history of, Appendix 367
Spectrum analysis, may transcend chemical analysis 373
Spectrum of metals 210;
Spectrum, absorption, of organic bodies 216
Spectrum, long, of electric light 203
Spectrum, relation of intensities of lines to temperature 365
Spectrum, ultra-violet 28
Stewart, Balfour, on law of exchanges of radiation 136 375
Stewart, Balfour, verified for tourmaline in enclosure 136
Telegraphy, submarine 61
Transition-films, in reflection of light 364
Tuning-fork, mutual interference of prongs 324
Uranium salts, fluorescent 209
Uranium salts, fluorescent, even when pure 220
Vibrations, communication to a gas 299
Vibrations, communication to a gas, from a cylinder 314
Vibrations, communication to a gas, from a sphere 303
Vibrations, direction of, in polarized light 50
Wind, effect on sound 110
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