INDEX.
MINERAL NAMES IN HEAVY-FACED TYPE.
- Abbreviations, ix
- Abnormal interference colors, 30
- Absorption, 26
- Acmite, 83
- Actinolite, 84
- Acute bisectrix, 5
- Ægirine, 83
- Ægirine-augite, 84
- Aggregate structure, 38
- Albite, 103
- Allanite, 96
- Allotriomorphic, 15
- Aluminium, test for, by Borichy’s method, 137
- test for, by Behren’s method, 139
- Amorphous bodies, 2
- Amorphous substances, test for, 26
- Amphibole, 84
- Analcite, 56
- Analyzer, 10
- Andalusite, 72
- Anhedron, 15
- Anisotropic character, test for, 27
- Anisotropic crystals, 2
- Anomalies, optical, 27
- Anorthite, 103
- Anorthoclase, 113
- Anthophyllite, 88
- Antigorite, 114
- Apatite, 68
- Apatite, recognition of, by test for phosphorus, 139
- Apparatus for petrographical laboratory, 127
- Appendix, 141
- Arfvedsonite, 88
- Augite, 80
- Automorphic, 13
- Axes of elasticity, 4
- Axial angle, 5
- determination of, 47
- Axial plane, 5
- Basaltic Hornblende, 85
- Bastite, 77
- Becke’s method for determining relative values of refractive indices, 19
- Behren’s method. (Hydrofluoric and sulphuric acids), 137
- Bertrand lens, 11
- Biaxial crystals, 4, 5
- vibration directions in, 4
- Biaxial interference figures, 43
- Biotite, 89
- Bisectrix, acute, 5
- obtuse, 5
- Borichy’s method. (Hydrofluosilicic acid), 135
- Broken or strained crystals, 15
- Bronzite, 76
- Calcite, 65
- Calcium, test for, by Borichy’s method, 136
- test for, by Behren’s method, 138
- “Cap” nicol, 10
- Carbonaceous Matter, 61
- Carbonaceous particles, test for, 132
- Carbonates, test for, 130
- Cement, 122
- for mounting, 126
- Cementing, 121
- Centering stage, 10
- Chalcedony, 64
- Characters observed by, convergent light, 40
- Characters of opaque minerals, 13
- transparent minerals, 13
- Chemical and mechanical tests, 129
- Chemical (micro) reactions, 134
- Chiastolite, 72
- Chlorite group, 92
- Chromite, 52
- Chrysolite, 77
- Chrysotile, 114
- Circular polarization, 3
- Classification into systems by optical determinations, 141
- Clay, 115
- Cleaning and finishing sections, 126
- Cleaning microscope, 11
- Cleavage, 23
- Clinozoisite, 96
- Color, 17
- Condensing lens, 9
- Consolidation of minerals in plutonic rocks, order of, 144
- Conventions, ix
- Convergent light, 40
- characters observed by, 40
- Convergent and parallel light, résumé of uses of, 49
- Cordierite, 78
- Corroded crystals, 15
- Corundum, 62
- Crossed nicols, characters observed by, 26
- Crossed twinning, 37
- Crystallites, 16
- Crystallizations obtained by Behren’s method, 137
- Borichy’s method, 135
- Crystals bounded by planes, 13
- Crystals without bounding planes, 15
- Cutting, 120
- Cutting and grinding machines, 117
- Cyanite, 113
- Damourite, 92
- Delessite, 94
- Diagram, showing relation between strength of double refraction, interference colors and thickness of section, 143
- Diallage, 80
- Diamond saws, 119
- Dichroite, 78
- Diopside, 80
- Dipyre, 59
- Directions of elasticity, ix
- Dispersion, 5, 48
- Disthene, 113
- Dolomite, 67
- Double image, 2
- Double refraction, 2, 27
- Effects produced by crystals on transmitted light, 2
- Elæolite, 69
- Elasticity, axes of, 4
- directions of, ix
- Electric motor for grinding machines, 117
- Electro-magnetic separation, 134
- Emery, grades of, for grinding, 124
- Enstatite, 75
- Epidote, 94
- Etched figures, 130
- Extinction, 31
- Extraordinary ray, 3
- Eye-pieces, 11
- Faster and slower rays, test for vibration directions of, 33
- Fayalite, 78
- Feldspar Group, 98
- Feldspathoids, 69
- Fibrolite, 73
- Finishing and cleaning sections, 126
- Focusing, 11
- Form of crystals, 13
- Fracture, 24
- Garnet, 53
- Gelatinizing silica, test for, 130
- Glass slides, 125
- Glaucophane, 88
- Graphite, 61
- Gravity (specific) separation, 133
- Gridiron twinning, 37
- Grinding, 123
- Grinding and cutting machines, 117
- Gypsum, 80
- Gypsum test-plate, 33
- Hardness of grains, 132
- Haüyne, 56
- Haüynite, 56
- Haüynite and noselite, micro-chemical distinction between, 139
- Heating sections to redness, 131
- Heavy solutions, 133
- Hematite, 61
- Hexagonal crystals, 4
- High relief, 17
- Hornblende, 84
- Hyalosiderite, 78
- Hydrargillite, 115
- Hydrofluosilicic acid test, 135
- Hypersthene, 75
- Idiomorphic, 13
- Idocrase, 60
- Ilmenite, 62
- Inclusions, 24
- Index of refraction, ix, 17
- Indicators for specific gravity separation, 133
- Indices of refraction (mean), table of, 142
- Interference color, determination of order of, 35
- Interference colors, 28
- Interference colors (abnormal), 30
- Interference figures, 40
- Investigation of microscopic and optical characters of minerals, 13
- Iolite, 78
- Iron, test for, by Borichy’s method, 137
- test for, by Behren’s method, 139
- Isolating crystals or mineral fragments for testing, 132
- Isometric crystals, 2
- Isotropic character, 26, 40
- crystals, 2
- Kaolin, 115
- Labradorite, 103
- Laps for grinding, 121
- Leucite, 54
- Leucoxene, 62
- Light, ordinary, 1
- plane polarized, 1
- Limonite, 51
- Lithia Mica, 92
- Machines for cutting and grinding, 117
- Magnesium, test for, by Borichy’s method, 137
- test for, by Behren’s method, 138
- Magnetic iron ore, 52
- Magnetic pyrites, 51
- Magnetite, 52
- Measuring strength of double refraction by von Federow mica wedge, 35
- Mechanical and chemical tests, 129
- Melilite, 61
- Menaccanite, 62
- Methods of preparing sections, 117
- Mica Group, 89
- Mica plate (quarter undulation), 33
- Mica wedge, von Federow, 35
- Micro-chemical reactions, 134
- Microcline, 102
- Microlites, 17
- Microscope (petrographical), 7
- Microscopic and optical characters of minerals, 51
- Minerals and thickness of section, determined by table and diagram, 36
- Monoclinic crystals, 4
- principal vibration directions in, 5
- Monoclinic pyroxenes, 80
- Mounting sections, 124
- solutions, 125
- Muscovite, 89
- Natrolite, 79
- Negative optical character, biaxial, 46
- uniaxial, 42
- Nepheline, 69
- Nephelite, 69
- Nicol prism, 7
- Nosean, 56
- Noselite, 56
- Noselite and haüynite, micro-chemical distinction between, 139
- Nose-piece for microscope, 10
- Objectives, 10
- Oblique extinction, 31
- Obtuse bisectrix, 5
- Oligoclase, 103
- Olivine, 77
- Opal, 51
- Opaque minerals, characters of, 13
- Optical, anomalies, 27
- character, biaxial, 46
- character, uniaxial, 42
- classification into systems, 141
- distinctions between orthorhombic, monoclinic and triclinic sections (perpendicular to bisectrices), 48, 141
- distinctions between tetragonal and hexagonal sections (perpendicular to optic axis), 141
- and microscopic characters of minerals, 51
- principal section, 3, 4
- scheme, 145
- Optic axes, 4
- Optic axis, 3
- Optics for optical mineralogy, 1
- Order of consolidation of minerals in plutonic rocks, 144
- Order of interference color, determination of, 35
- Ordinary light, 1
- ray, 3
- Orthite, 96
- Orthoclase, 98
- Orthorhombic crystals, 4
- principal vibration directions in, 4
- Orthorhombic pyroxenes, 75
- Parallel and convergent light, résumé of uses of, 49
- Parallel extinction, 31
- Parallel face sections, grinding apparatus for, 119
- Pargasite, 85
- Perofskite, 57
- Perovskite, 57
- Petrographical apparatus, 127
- Petrographical microscope, 7
- Phenocryst, 14
- Phlogopite, 89
- Picotite, 53
- Piedmontite, 95
- Plagioclases, 103
- Plane polarized light, 1
- Plates, grinding, 121
- Pleochroic halos, 59
- Pleochroism, 25
- test for, 25
- Pleonaste, 53
- Polarization colors, 28
- Polarized light, characters observed by, 25
- plane, 1
- Polarizer, 7
- test for vibration plane of, 9
- Polishing sections, 124
- Polysynthetic twinning, 37
- Positive optical character, biaxial, 46
- uniaxial, 42
- Potassium, test for, by Borichy’s method, 136
- test for, by Behren’s method, 138
- Preparation of sections, 117
- Principal section, optical, 3, 4
- Principal vibration directions, 3, 4
- Prism, nicol, 7
- Pseudomorphic structure, 39
- Pyrite, 51
- Pyrites, 51
- Pyroxenes, monoclinic, 80
- Pyroxenes, orthorhombic, 75
- Pyrrhotite, 51
- Quarter-undulation mica plate, 33
- Quartz, 63
- wedge, 34
- Reflected light, characters observed by, 13
- Reflector, 7
- Refraction, double, 2, 27
- Refraction, index of, ix, 17
- Refractive indices (mean), table of, 142
- Relief, 17
- Resorption border, 15
- Résumé of uses of parallel and convergent light, 49
- Rotating stage of microscope, 10
- Rutile, 57
- Sagenite, 58
- Sanidine, 102
- Saussurite, 96, 113
- Saws, 119
- Scapolite Group, 59
- Scheme of classification into systems by optical determinations, 141
- Scheme, optical, 145
- Schiller structure, 25
- Schrœder van der Kolk’s method for determining refractive indices, 22
- Sections, methods of preparing, 117
- thickness of rock, 124
- Selenite plate, 33
- Separation, by chemical means, 134
- Sericite, 92
- Serpentine, 114
- Shagreened surface, 17
- Shorl, 70
- Sillimanite, 73
- Simple twinning, 37
- Single image, 2
- Skeleton forms, 17
- Slides, glass, 125
- Slower and faster rays, test for vibration directions of, 33
- Sodalite, 56
- Sodalite Group, 56
- Sodium, test for, by Borichy’s method, 136
- test for, by Behren’s method, 138
- Sorby’s method for determining index of refraction, 19
- Special micro-chemical tests, 139
- Specific gravity separation, indicators for, 133
- Sphærulitic structure, 39
- Sphene, 96
- Spinel, 53
- Stage of microscope, rotating, 10
- Staurolite, 74
- Strained or broken crystals, 15
- Strength of double refraction, measure of, 30, 35
- Structure, 37
- Symmetrical extinction, 31
- Systems, classification into, by optical determinations, 141
- Table, double refraction, 142
- Table, indices of refraction, 142
- Talc, 94
- Test for vibration plane of polarizer, 9
- Tetragonal crystals, 4
- Thickness of rock sections, 124
- Thickness of section and minerals, determined by table and diagram, 36
- Titanite, 96
- Transmitted light, characters observed by, 13
- effect on crystals, 2
- Transparent minerals, investigation of characters of, 13
- Tremolite, 84
- Triclinic crystals, 4
- principal vibration directions in, 5
- Tridymite, 65
- Topaz, 74
- Tourmaline, 70
- Twinning, 37
- Uniaxial crystals, vibration directions in, 3
- Uniaxial interference figures, 40
- Uralite, 88
- Uralitization, 88
- Uses of parallel and convergent light, 49
- van der Kolk’s, Schrœder, method for determining refractive indices, 22
- Vesuvianite, 60
- Vibration direction, 2
- von Federow mica wedge, 35
- Wavy extinction, 16, 31
- Wedge, mica, 35
- quartz, 34
- Wernerite, 59
- Xenomorphic, 15
- Zeolites, 79
- Zircon, 58
- Zoisite, 96
- α and β, 96
- Zonal structure, 38