220

Furnace, arc 221
electric 221
resistance 221

Fusion methods 271

Galena 373

Gallium 327

Galvanized iron 323

Gas, collection of 15
coal 217
fuel 217
illuminating 217
measurement of 23
natural 219
purification of 218
water 219

Gases, table 220

Gasoline 400

German silver 323, 359

Germanium 370

Germs, effect of cold on 53
in air 84
in water 52

Glass 262
coloring of 263
etching of 177
molding of 263
nature of 263
varieties 263

Glauber's salt 281

Glazing 336

Glucose 414

Glycerin 405
nitrates of 409

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 4