Gold 393 alloys 396 chloride 396 coin 359 extraction of 394 in copper 358 mining 394 occurrence 393 properties 396 refining of 395 telluride 394 Goldschmidt method 269, 330 Gram-molecular weight 236 Granite 336 Graphite 198 Gun cotton 415 metal 359 powder 292 Gypsite 308 Gypsum 308 Halogens 174 Hard water 309 Heat of reaction 75 Helium 80, 314 Hematite 339, 349 Homologous series 398 Hydriodic acid 193 Hydrobromic acid 189 Hydrocarbons 201, 398 properties 400 series 398 substitution products 401 Hydrochloric acid 182 composition 183 oxidation of 185 preparation 182 properties 184 salts 186 Hydrocyanic acid 210 Hydrofluoric acid 176 etching by 177 salts of 177 Hydrogen 28 dioxide 56 explosive with oxygen 35 occurrence 28 preparation from acids 30 preparation from water 28 properties 32 standard for atomic weights 66 standard for molecular weights 227 sulphide 146 uses 38 Hydrolysis 254 conditions affecting 255 partial 255 Hydrosulphuric acid 146 Hydroxyl radical 112 Hypochlorous acid 187 Hypothesis 61 Avogadro's 226 Dalton's 61 Ice manufacture 125 Iceland spar 305 Indigo 418 Indium 327 Insoluble compounds 272 Iodic acid 194 Iodides 193 Iodine 190 oxygen compounds 193 preparation 191 properties 192 tincture 192 Iodoform 192, 401 Ions 100 and electrolytes 104 Iridium 393 Iron 339 alum 352 cast 343 compounds 349 cyanides 352 disulphide 351 family 338 metallurgy 339 occurrence 339 ores 339 oxides 349 pure 348 varieties 342, 347 wrought 343 Jasper 260 Kainite 288 Kaolin 261, 335 Kerosene 400 Ketones 411 Kieserite 288 Kindling temperature 17 Krypton 80 Lactic acid 408 Lampblack 200 Laughing gas 132 Law, definition 61 of Boyle 24 of Charles 23 of combining volumes 194 of conservation of energy 4 of conservation of matter 5, 59 of definite composition 59 of Dulong and Petit 233 of Gay-Lussac 194 of multiple proportion 60 of Raoult 233 periodic 169 Lead 373 acetate 375, 407 alloys 375 basic carbonate 376 carbonate 376 chloride 377 chromate 377 insoluble compounds 376 metallurgy 373 nitrate 375 occurrence 373 oxides 375 peroxide 375 properties 374 red 375 soluble salts 375 sugar of 375 sulphate 377 sulphide 377 white 376 Le Blanc soda process 282 Levulose 415 Lime 302 air-slaked 303 hypochlorite 307 kilns 303 slaked 303 Lime light 38 Limestone 305 Limewater 303 Limonite 339 Litharge 375 Lithium 294 Luminosity of flames 216 Lunar caustic 366 Magnesia 318 alba 319 usta 318 Magnesite 318 Magnesium 317 basic carbonate 319 carbonate 318 cement 318 chloride 319 family 316 hydroxide 318 oxide 318 silicates 321 sulphate 320 Magnetite 339, 349 Malachite 357 Manganates 381 Manganese 379 a base-forming element 380 an acid-forming element 381 in glass 263 occurrence 379 oxides 380