INDEX
Reading edition
Airy’s spirals, 197
Alpine snow-field, 49
Alum, ammonium iron, 43; cæsium, 42; potash, 5, 16, 17, 77; vicinal faces of potash, 248, 251
Amethyst quartz, 222–229; as example of pseudo-racemism, 231, 232
Ammonium chloride labile crystallisation, 248; iron alum, 43; NH4 group, and its isomorphism with alkalies, 82, 83, 131; oleate, liquid crystals of, 259–263; oleate, twins of, 262
Ampère’s researches on ammonia, 83
Anatase, crystal of, 37
Antimony oxide, dimorphism of, 87, 88
Apatite, crystal of, 37
Aragonite, biaxial interference figure of, 189, 190
Armstrong and Pope on sobrerol, 153
Arsenic oxide, crystals of, 5, 88
Astatic systems of molecular magnets of Lehmann, 271, 272
Asymmetric carbon atom, 144, 145
Axes and axial planes of crystals, 51, 55, 56
Axial ratios, 129
Babinet’s double-wedge quartz plate, 219
Bacteria, destruction of one enantiomorphous form by, 149
Barium nitrate, 152
Barker, researches on perchlorates, 123
Barlow, discovery of remainder of 230 point-systems, 118, 119, 140; and Pope’s theory, 285–292
Bartolinus, Erasmus, 17
Benzoic acid, screen experiment on crystallisation of, 229–231
Bergmann and Gahn’s laws of cleavage, 18
Berzelius and Mitscherlich, atomic weights and isomorphism, 80, 82, 83, 85
Beudant’s researches on the vitriols, 75, 76
Biaxial crystals, 60°-prisms and refractive indices of, 162, 163, 184; optic axes of, 185; optic axial angle of, 191
Biot’s researches on tartaric and racemic acids, 143
Biquartze, natural and artificial, 181, 211, 214, 216, 217
Black band of quartz twins, 216–218
Boisbaudran, Lecoq de, 238
Boyle, Robert, 17
Brauns, 254
Bravais, 114; space-lattices, 114
Brookite, 91
Cæsalpinus, 15
Cæsium alum, 42
Calcite, crystals of, 10–13, 38; amount of double refraction of, 174; in rock sections, 177, 178; uniaxial interference figure of, 189, 190; plate perpendicular to axis of, 209; refractive indices of, 174; 60°-prism of, 165, 168
296Calcium carbonate, three habits of crystals of, 11
Calcium dextro-glycerate, optical activity and crystal form of, 155–160
Carangeot’s contact goniometer, 18–20
Carbonate, calcium, 11, 87; potassium sodium, 44
Carbonates of alkaline earths, 74
Carbon, dimorphism of, 137
Carbon dioxide, liquid in quartz cavities, 46
Cavendish, 23
Chemical significance of crystallography, 73, 283, 284; valency and crystalline form, 285–291
Cholesteryl benzoate, liquid crystals of, 258; acetate, spherical liquid crystals of, 281, 282
Chromate, potassium, 84
Chromates and manganates, isomorphism with sulphates, 84
Classes, the 32 crystal, 6, 33
Cleavage, 17; and glide-planes, 275, 276
Cobalt sulphate, 78
Conditions for growth of crystals, 240, 244, 245
Constancy of crystal angles, 6, 13, 14, 17, 23, 132
Convergent light experiments, 186, 188
Copper sulphate, 40, 76, 78
Coppet, de, 238
Crookes, Sir William, 138, 208
Crossed-axial-plane dispersion of optic axes, 89, 94, 95; of ethyl triphenyl pyrrholone, 106, 107, 108; of gypsum, 89
Crystal, definition of, 4; germs and their influence on crystallisation, 236, 237
Crystals, modes of formation of, 4, 5
Cube and its perfection of symmetry, 38; axes of, 52
Cubic system, 37
Cyanide, potassium cadmium, crystals of, 42
Dalton, 25
Dark field of polariscope, 188, 202
Davy, Sir Humphry, researches on ammonia, 82, 83
Delafosse and morphotropy, 101
Deville and Troost’s researches on tantalum chloride, 84, 85
Diamond, 8, 137, 138, 207, 208
Dibenzal benzidine, liquid crystals of, 264
Digonal axis of symmetry, 36
Dimensions of structural parallelepipeda, 129
Dimorphism, 79, 87; of antimony oxide, 87, 88; of carbonate of lime, 79, 87; of mercuric iodide, 97; of sodium dihydrogen phosphate, 80, 81; of sulphur, 86; of vitriols, 79
Directive molecular force in crystallisation, 139, 269, 274–277
Dog-tooth spar, 10–12
Double refraction, interference colours due to, 176, 177; measure of, 169, 170; of biaxial crystals, 184; of uniaxial crystals, 183
Double sulphates and selenates, 35, 79, 121, 127, 128, 132
Dulong and Petit’s law, 84
Electronic corpuscles, constituents of atoms, 113, 124
Elements of a crystal, 68, 69
Enantiomorphism and optical activity, 140; 11 classes showing, 150
Epsom salts, 76, 78
Ethyl triphenyl pyrrholone, 105, 106
Eutropic series, definition of, 132
External molecular compensation, 134, 234
Extinction directions, 204, 205
Fedorow, von, discovery of remainder of 230 point-systems, 118, 119, 140; 297theory of, 291, 292
Ferricyanide, potassium, 44
Ferrocyanide, potassium, 43
Ferrous sulphate, 76, 78
Fletcher, indicatrix of, 184
Fluorspar, single refraction of, 206
Form, definition of a, 11, 60, 61
Frankenheim on morphotropy, 101; discovery of space-lattices, 114
Frankland and Frew, 155
Fuchs, von, researches on sulphates of barium, strontium, and lead, 75, 77
Fuess reflecting goniometer, 64–66
Fundamentalbereich of Schönflies, 112, 113
Gattermann, 258
Gay-Lussac on alums, 77; on ammonia, 83; on racemic acid, 142
Gernez, 238
Gessner, 14
Gmelin, researches on racemic acid, 142
Goniometer, contact, 19, 20; reflecting, 64–66
Graphite, 137
Groth, von, morphotropic researches, 98, 102–104
Growth of a crystal, 1; from solution, 237–254
Guglielmini, researches on crystal structure, 17
Gypsum (selenite), cleavage of, 203; crystals of, 14; extinction directions of, 204; 60°-prism, experiment with, 163, 168; twins of in polarised light, 205, 206
Habit of crystals, 12, 13
Hardness of crystals, 255, 274
Hatchett’s discovery of columbium, 85
Haüy, 22; and Mitscherlich, 70, 75, 77, 88, 132; fundamental forms, 22, 23; law of constancy of form, 23; lattices, 29; law of rational indices, 24, 29, 30; modernisation of theories of, 30–32; molécules intégrantes, soustractives, and élémentaires, 25–28; structural units, 24
Hemihedral classes of crystals, 34
Hexagonal axes of symmetry, 36; prism, 11; system, 36, 53
Hexakis octahedron, 39; indices of, 61
Hjortdahl and morphotropy, 101
Holohedral classes of crystals, 34
Homogeneity, 6, 16; definition of, 114
Homogeneous structures, the 230 types of, 6, 111
Hooke, Robert, 16
Huyghens, 17; discovery of laws of double refraction, 17; investigation of calcite, 17
Ice, crystalline form of, 47
Iceland spar, discovery of, 17; rhombohedron of, 10–12
Inactive tartaric acid, 144
Inactivity, true optical, 235
Indicatrix of Fletcher, 184
Indices of crystal faces, 11
Intercepts on crystal axes, 58
Interference colours due to double refraction, 177; figures of biaxial and uniaxial crystals, 189–191
Internal structure of crystals, 15, 111–120
Iodide of mercury, dimorphism of, 97
Isomerism, chemical and physical, 142, 143
Isomorphism, Mitscherlich’s conferment of the term, 81; doctrine of, 81, 82; limitations of, 85; recent clearer definition of, 121–132
Isotropic crystals, 206
John of Berlin’s discovery of racemic acid, 142
298Kipping and Pope, definition of racemism and pseudo-racemism, 153, 154
Kopp, 100
Kundt’s powder, 149
Labile solutions, 241
Laurent and Nickle’s organic researches, 99
Lavoisier, 23
Law of rational indices, 24, 50, 57, 59
Le Bel and van t’Hoff’s explanation of optical activity, 151
Le Blanc, researches on alums, 77
Lehmann, researches on liquid crystals, 256–282
Liquid crystals, 255–282; and polymorphism, 138, 139; list of substances forming, 280, 281
Magnesium sulphate, 76, 78
Mallard and Le Chatelier on silver iodide, 256
Manganate, potassium, 96
Manganates, 84, 96
Manganese sulphate, 78
Marignac and isomorphism of tantalum and niobium compounds, 84; and morphotropy, 101
Mercury iodide, dimorphism of, 97
Metastable solutions, 240
Methyl triphenyl pyrrholone, 105, 106
Mica-sectors plate for testing sign of optical rotation, 212, 213
Microscope, Lehmann’s crystallisation, 256, 257, 276–280
Miers, H. A., researches on crystallisation, 238–243; on red silver ores, 109; on vicinal faces, 248–254
Millerian indices, 57
Mirror-image symmetry, 118, 119, 134, 135; illustrated by quartz, 231
Mitscherlich, experiment with gypsum, 90–94; work of, 70–97
Mixed crystals, 77, 86
Molecular compound, racemic acid a, 150
Molecular volume and distance ratios, 129, 130
Molecule, individuality and directive force of, 139, 269
Monochromatic illuminator, 192, 193
Monoclinic system, 39; axes and axial planes of, 53, 54
Morphotropy, 98–104
Muthmann, researches on permanganates, 123
Naphthalene tetrachloride, 99
Newton’s seven orders of spectra, 177
Nickel sulphate, 76, 78
Nicol prism, 174, 175, 187
Nitrobenzenes, von Groth’s researches on, 104
Noble, Sir Andrew, experiments on liquefaction of carbon, 138
Optical activity and mirror-image symmetry, 141; antipodes, characters of, 152; characters of crystals, 7
Optically active classes of crystals, 150, 151
Optic axes of biaxial crystals, 185; axis of uniaxial crystals, 165; axial angle, 191; axial angle of ethyl triphenyl pyrrholone for different wave-lengths, 107, 191; axial angle of gypsum at different temperatures, 90–94, 191
Ostwald’s predictions of crystallisation phenomena, 238, 240
Oxides of arsenic and antimony, isodimorphism of, 88
Para-azoxy-anisol, liquid crystals of, 259, 265; 299-benzoic acid, 263; -cinnamic acid, 263; -phenetol, 258, 259
Parametral form, 56
Pasteur’s law, 155; research on morphotropy of tartrates, 100; research on tartaric and racemic acids, 142–150
Penfield’s diagram of spherical projection, 61, 62
Penicillium glaucum, destruction of dextro component of racemic acid, 148
Perchlorates and permanganates, isomorphism of, 84, 96
Pfaff, 254
Phases, different solid, 137
Phenol and resorcinol, von Groth’s researches on, 103
Phosphate, ammonium magnesium, 43; sodium dihydrogen, dimorphism of, 80, 81
Phosphates and arsenates, isomorphism of, 73, 74
Phosphorus, dimorphism of, 138
Photomicrographs of growing crystals, mode of obtaining, 41
Pistor’s goniometer, 89
Planeness of crystal faces, 6, 7
Polarisation colours due to optical activity, 179
Polarisation, rectangular, of spectra from doubly refractive prisms, 164
Polariscope, the, 187, 188
Polymorphism, 133–137
Pope and Barlow, theory of, 285–291
Positive and negative uniaxial and biaxial crystals, 166
Potassium bichromate, metastable and labile crystallisation of, 246, 247; manganate, 96; nickel sulphate, 35; selenate, 96; sulphate, 13
Priestley, 23
Primitive form of Romé de l’Isle, 20, 27
Projection polariscope, for convergent light, 92, 186, 188, 189; for parallel light, 201, 202
Progressive change of crystal angles in isomorphous series, 125; of double refraction, 126; of molecular distance ratios, 130, 131; of position of optical ellipsoid, 128
Propyl triphenyl pyrrholone, 106, 108
Proustite, 109, 110
Pseudo-racemism, 153, 154
Pyrargyrite, 109, 110
Pyroelectrical properties of crystals, 149
Quartz, 170; crystalline form of, 171, 172; crystals in rock sections, polarisation colours of, 175–178; crystals, liquid cavities in, 45; crystals on sand grains, 2, 3; double refraction of, 174; interference figure in convergent polarised light, 194–196; optical activity of, 173, 179–181, 210; plates, preparation of for polariscope, 181; polarisation colours of due to optical activity, 209, 210; refractive indices of, 174; screw point-systems of, 151; 60°-prism experiment with, 165, 168; Steno’s research on, 16; twinning of, 215, 216, 219–221, 225; two varieties of as examples of mirror-image symmetry, 171
Racemate, sodium ammonium, Pasteur’s researches on, 147, 148
Racemic acid, 142–146, 233, 234
Racemic forms and racemism, 150, 153, 233
Rammelsberg and morphotropy, 101
Rational indices, 24, 50, 59, 116
Reflection of light by crystal faces, 8
Refractive index, meaning of, 167
Reinitzer, 258
300Reusch’s artificial quartzes, 198, 199
Rhombic system, 39; axes and axial planes of, 52, 54
Rhombohedron and its axes, 10, 11, 54, 55, 172
Rings and brushes, optic axial, 190, 191
Rock-salt, cube of in quartz cavity, 45; 60°-prism experiment with, 162, 168
Romé de l’Isle, 18–20; researches on alums, 77
Roozeboom, 238
Rotation of plane of polarisation by quartz of two varieties and different thickness, 180, 210, 211
Royal Institution experiment with diamonds, 8
Sal-ammoniac, 82, 83
Salol and betol, Miers’ researches on, 242, 243
Sand grains with quartz crystals, 3
Scalenohedron of calcite, 11
Scheele’s discovery of tartaric acid, 142
Schlippe’s salt, 45
Schönflies, discovery of remainder of 230 point-systems, 118, 119, 140
Seebeck, researches on ammonia, 82, 83
Selenates, isomorphous with sulphates, 96; of alkalies, 121
Selenic acid, 95
Selenite, polarisation colours of films of, 203
Selenium, discovery by Berzelius, 96
Sella’s warning against hasty generalisation, 102
Senarmontite, 88
Silver iodide, 256, 292
Single refraction of cubic crystals, 162, 183
Snow crystals, 49
Sobrerol, 153
Sodium chlorate, 151; sulphantimoniate, 45
Sohncke, regular point-systems, 117; mirror-image molecular arrangement, 141; two point-systems of quartz, 151
Sollas, crystal structure, theory of, 292
Solubility and supersolubility, 238–241; curves of, 240
Solutions, optical activity of, 151; metastable and labile, 240, 241
Space-lattices, 50, 114–116; triclinic illustration of, 115
Specific gravity, importance of determinations of, 129
Spheres of influence of atoms, 113
Steno, 16
Stereographic projection, 34, 62, 67; of topaz, 68; of double sulphates, 35
Stereometric arrangement of atoms in molecule, 124, 136
Story Maskelyne, 34
Strain, polarisation colours of glass and diamond due to, 207, 208
Structural units of crystals, 24, 111–113
Sulphantimoniate of sodium, 45
Sulphate, ammonium magnesium, 44
Sulphates of alkalies, 121; of barium, strontium and lead, 74
Sulphur, dimorphism of, 86, 87, 137; monoclinic form of, 4, 86
Symbol of a face or form, 57
Symmetry, axes and planes of, 34, 36, 41, 55; elements of, 34
Systems, the crystal, 6, 7, 33
Tartaric acid, 142–148; dextro, 143, 146–148; lævo, 144, 146–148; pyro-electrical properties of, 149
Tartrate, hydrogen potassium, 43
Tetartohedral classes of crystals, 34
301Tetragonal system, 37; axes and planes of, 36, 52
Thallium, relation of to alkali metals, 131
Thénard and Gay-Lussac, research on ammonia, 83
Thomson, J. M., 238
Thomson, Sir J. J., discovery of composition of atoms, 112
Topaz, crystal of, 40; stereographic projection of, 68
Transition tint, 180
Triclinic bipyramid, 56; system, 40; axes and planes of, 53, 54
Trigonal system, 37; axes and planes of, 37, 53, 55
Triphenyl pyrrholone derivatives, 105–108
Triple tartrate of sodium, potassium, and ammonium, 91
Tutton, fixed positions of atoms in crystals, 122–124; law of progression of crystal properties in isomorphous series, 121–123, 129; nature of structural units, 134, 135; research on calcium dextro-glycerate, 157, 160; researches on simple and double sulphates and selenates, 121; researches on triphenyl pyrrholones, 105–108
Uniaxial crystals, optic axis of, 165; 60°-prisms of, 164; two refractive indices of, 166, 183
Valentinite, 88
Vanadium family group of elements, 85
Vauquelin, researches on alums, 77
Vicinal faces, 248–254
Vitriols, the, 15, 76, 78
Von Lang, 23, 34
Vorländer, 263; nature of molecules forming liquid crystals, 273
Water, exceptional thermal dilatation of, 47
Water flowers in ice, 47
Water of crystallisation, 76, 78, 79
Wave-length of most luminous part of spectrum, 179
Werner’s fundamental form, 20
Westfeld, 18
Weyberg, 250
White of higher orders, 178
Wollaston’s reflecting goniometer, 63, 81; work on carbonates and sulphates of barium, strontium and lead, 74, 75
Wulff, 250, 252, 253
Zinc sulphate, 76, 78
Zone of crystal faces, 63; circle, 63
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TRANSCRIBER’S NOTES
Silently corrected obvious typographical errors and variations in spelling.
Retained archaic, non-standard, and uncertain spellings as printed.
Re-indexed footnotes using numbers and collected together at the end of the last chapter.