Carbon, atomic weight of, 75 specific heat of, 71 tetravalency of, 115 Carbon carbonyl, 155 Carbon suboxide, 155 Carnelley, 108 Carnolite, 58 Cavendish, 43, 45 Cayley, 120 de Chancourtois, 102 Chloral hydrate, 159 Choline, 161 Cinchonine, 137 Clausius, 83, 179 Cleve, 38, 47 Cleveite, 47 Cocaïne, 136, 162 Codeine, 137 Coindet, 8 Collie, 49, 128 Condensation, 152 Conine, 162 Conservation of mass, law of, 78 Coumarin, 132, 162 Critical point, 94 Critical pressure, 95 Crookes, Sir William, 35, 40, 75 Curie, Marie, 55 Cyanic acid, 7 Cyanuric acid, 7 Debierne, 59 Decipium, 40 Delafontaine, 49 Demarçay, 30 Desch, 151 Deville, 184 Dewar, 71, 96, 127 Dexter, 157 Didymium, 40 Digitalis, 10 Disintegration theory, 54 Dixon, 184 Dobbie, 151 Doebner, 134 Dumas, Jean B. A., 8, 9, 30, 31, 63, 75, 102, 130 Duppa, 148 Dysprosium, 38 Edestin, 169 Electrolysis, 179 Elements, nomenclature of, 27 Emanation from Radium, 58 Emanium, 60 Enantiomorphism, 140 Enzymes, 144 Ether, discovery of its constitution, 12, 17 Etherin theory, 10 Europium, 39 Favre, 183 Fenton’s reagent, 154 Findlay, 151 Fischer, Emil, 158, 165, _et seq._ Fittig, 153 Fluorine, 33, 34 Formulæ, chemical, significance of, 68 Frankland, 114, 116, 148 Fuchsine, 4 Fumaric acid, 146 Gadolinium, 39 Gallium, 36, 107 Gases, kinetic theory of, 83 law of diffusion of, 84, 89 liquefaction of, 94 molecular theory of, 79 Gas-mantles, 40 Gay Lussac, 63, 80 Geometrical isomerism, 146, 147 Gerhardt, 79, 113 Germanium, 37, 107 Geuther, 148 Gibbs, Willard, 184 Giesel, 60 Gladstone, 30, 102, 184 Gmelin, 7, 63, 102 Gore, 33 Graebe, 162 Graham, Thomas, 2, 14, 23, 29, 83 Grignard’s reagent, 154 Groth, 184 Guldberg, 183 Guye, 81 Haarmann, 132 Hæmoglobin, 168 Hantzsch, 147 Hartley, 151 Haüy, 139 Heliotropin, 132 Helium, 43, 47, 49 Helmholtz, 117 Henry’s law, 173 Hermann, 26 Herschel, 140 Hess, 181, 183 Heumann, 163 Heymann, 163 Hillebrand, 47 Hittorf, 179 Hofmann, August W., 3, 67, 133, 161 Holmium, 38 Hoogewerff, 133 Horbaczewski, 157 Hübner, 127 Hydrogenium, 16 Hyoscyamine, 135 Ilmenium, 26 Indigo, 162, 164 Indigo blue, 163 Indium, 36 Ingenhousz, 185 Ionisation, 178 Ionium, 58 Ionone, 132 Irone, 132 Isoborneol, 131 Isoconine, 134 Isoquinoline, 133 Isotonic solutions, 178 Jones, H. C., 183 Jones, H. O., 147 Kahlenberg, 183 Kammerlingh Onnes, 49, 97