parting of 365
refining 365
sulphide 366

Slag 340

Smalt 355

Smithsonite 321

Smokeless powder 293

Soaps 410

Soda ash 284

Soda lime 202

Sodium 276
acetate 407
bicarbonate 285
carbonate 282
carbonate, historical 284
chloride 280
chromates 386
hydrogen carbonate 285
hydroxide 278
hyposulphite 282
iodate 191
nitrate 285
occurrence 276
peroxide 277
phosphates 286
preparation 276
properties 277
sulphate 281
sulphite 281
tetraborate 287
thiosulphate 282

Solder 372, 375

Solubility of gases 95
of solids 96

Solution 94
and chemical action 53
boiling point 98
classes 94
distribution of solids in 98
electrolysis of 99
freezing point 99
of gases in liquids 94
of solids in liquids 96
properties 98
saturated 97
supersaturated 98

Solvay soda process 283

Sombrerite 239

Spectroscope 296

Sphalerite 325

Spiegel iron 343

Spinel 332

Spontaneous combustion 20

Stalactites 305

Stalagmites 305

Standard conditions 23

Stannates 372

Stannic acid 372
chloride 372
oxide 372

Stannous chloride 372

Starch 415

Stassfurt salts 287

Stearic acid 407

Stearin 409

Steel 345
alloys 348
properties 347
tempering of 348
tool 347

Stibine 251

Stibnite 250

Stoneware 336

Strontianite 312

Strontium 312
hydroxide 312
nitrate 312

Structural formulas 119

Structure of compounds 119

Strychnine 419

Substitution 70

Sugars 412
cane 412
fruit 415
grape 414
milk 414

Sulphates 159

Sulphides 148

Sulphites 152
action of acids on 150

Sulphur 143
allotropic forms 144
chemical properties 145
comparison with oxygen 161
dioxide 149
preparation 149
properties 150
extraction 143
flowers of 143
occurrence 143
oxides 149
physical properties 144
trioxide 152
uses 146
varieties 144

Sulphuric acid 154
action as an acid 157
action on metals 157
action on organic matter 158
action on salts 158
action on water 158
fuming 155
manufacture 154
oxidizing action 157
plant 156
properties 157
salts 159

Sulphuric anhydride 153

Sulphurous acid 151

Superphosphate of lime 246

Sylvine 288

Symbols 11

Synthesis 40

Table, alkali metals 274
alkaline-earth metals 300
alloys of copper 359
aqueous tension Appendix B
atomic weights Appendix A
chlorine family 174
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