Alizarin black, 172 Alizarin blue, 174 Alizarin carmine, 174 Alizarin green, 174 Alizarin orange, 174 Alkali blue, 93 Amidodimethylaniline, 112 Ammonia in gas-liquor, 64 Ammonia, origin in gas-liquor, 65 Analyses of coal, 23 Aniline black, 114 Aniline, history, 75 Aniline, manufacture, 87 Aniline yellow, 116 Annual production of ammonia, 68 Anthracene, 171 Anthracene brown, 174 Anthracene oil, 81, 167 Anthragallol, 174 Anthrapurpurin, 174 Anthraquinone, 173 Antifebrine, 179 Antipyrine, 183 Archil substitute, 151 Arctic coal, 12 Arsenic acid process, 90 Arsenic acid, recovery, 94 Artificial alizarin, 173 Artificial purpurin, 173 Asphalte, 176 Auramine, 106 Aurin, 132 Azines, 109 Azo-blacks, 159 Azo-colours, 118 Azo-dyes for cotton, 158 Azobenzene, 119 Azo-dyes from salicylic acid, 135 Azotoluene, 119 Baeyer, A. v., indigo, 127 Baeyer, A. v., phthaleins, 146 Basle blue, 111 Becher, early experiments, 34 Beet-sugar cultivation, 67 Benzal chloride, 102 Benzaldehyde, 103 Benzene, discovery, 73 Benzene, final purification, 86 Benzene in tar-oil, 73 Benzene theory, 196 Benzidam, 75 Benzidine, 136 Benzoic acid, manufacture, 104 Benzotrichloride, 102 Benzyl chloride, 102 Bernthsen, methylene blue, 113 Bethell, timber preserving, 70 Biebrich scarlet, 156 Biology, dyes used in, 192 Bismarck brown, 116 Bitter-almond oil, 103 Bone oil, 180 Boettiger, Congo-red, 157 Breant, timber pickling, 70 Briquettes, 178 Burning naphtha, 86 Calorific value of carbon, 25 Calorific value of coal, 20 Carbolic acid, 129 Carbolic oil, 23, 80, 129 Carbon dioxide, 24 Carboniferous period, 11 Caro and Kern, phosgene dyes, 106 Caro and Wanklyn, rosolic acid, 133 Caro, fluorescein and eosin, 147 Caro, methylene blue, 112 Chemical washing, 83 Chlorophyll, 29 Chrysamines, 136 Chrysoidine, 116 Cinnamic acid, 128 Clayton, Dean, distils coal, 35 Clegg, Samuel, gas-engineer, 40 Coal, amount raised, 59 Coal-fields of United Kingdom, 60 Coal-gas, composition, 56 Coal-gas, manufacture, 42 Coal-mining, history, 57 Coal, origin, 9 Coal, supply, 59 Coerulein, 147 Coke, composition of, 48 Coke from gas-retorts, 45 Coke-oven tar, 49 Coke, uses of, 47 Combustion, 23 Composition of coal, 23 Congo red, 157 Conservation of energy, 18 Constitution of molecules, 95 Corallin, 132 Cotton dyes, 137 Coumarin, 185 Coupier's process, 91 Creosote oil, 163 Creosoting of timber, 70 Cresols, 131 Cresylic acid, 131 Cretaceous coal, 12 Crocein scarlets, 156 Crystal violet, 106 Cumidine, 155 Cyanin, 188 Dale and Caro, induline, 120 Destructive distillation, 33 Diazo-compounds, 116 Diazotype, 191 Dimethylaniline, 100 Dinitrobenzene, 120 Diphenylamine, 101