properties and periodic groups 171
state 3

Physics 1, 4

Pitchblende 314

Plaster of Paris 308

Platinic chloride 393

Platinized asbestos 391

Platinous chloride 393

Platinum 391
a catalytic agent 152, 392

Pneumatic trough 16

Polyboric acid 265

Polyhalite 288

Polysilicic acids 261

Porcelain 336

Portland cement 304

Potash 293

Potassium 287
acid carbonate 294
acid sulphate 294
acid sulphite 294
alum, aluminium 334
alum, chrome 384
alum, iron 352
and plant life 287
aurate 396
bromide 290
carbonate 293
chlorate 291
chloride 290
chromate 385
cyanide 293
dichromate 386
ferricyanide 352
ferrocyanide 352
hydroxide 288
hydroxide, action of halogens 289
hypochlorite 289
iodide 290
manganate 381
nitrate 291
occurrence 287
permanganate 381
preparation 288
sulphate 294

Precipitated chalk 306

Precipitation 140

Properties, chemical 3
physical 3

Prussic acid 210

Puddling 343
furnace 344

Pyridine 412

Pyrites 351

Pyrolusite 380

Pyrophosphoric acid 245

Quantitative equations 72

Quartz 260

Quicklime 302

Quinine 418

Quinoline 412

Radical 112

Radium 313

Reaction, classes 70
addition 70
completed 139
heat of 75
of decomposition 70
of double decomposition 71
of substitution 70
reversible 137
steps in 131

Realgar 246

Red lead 375
phosphorus 241

Reducing agent 37

Reduction 36, 354

Rennin 414

Resemblances, family 170

Respiration 87

Rhodium 390

Rochelle salts 408

Rouge 349

Rubidium 294

Ruby 331

Ruthenium 390

Rutile 264

Safety lamp 202

Sal ammoniac 294
soda 282

Salt 280

Saltpeter 291
Chili 285

Salts, 109
acid, 112

Salts basic 111
binary 114
characteristics 109
definition 109
insoluble 272
mixed 244
nomenclature 113
normal 112
preparation by precipitation 270

Sand 260

Sandstone 260

Saponification 410

Sapphire 331

Satinspar 308

Scale 320

Schoenite 288

Selenite 308

Selenium 161

Serpentine 320, 336

Shot 247, 375

Siderite 339

Silica 260

Silicates 261

Silicic acids 261

Silicides 259

Silicon 258
acids 261
dioxide 260
fluoride 258
hydride 258

Silver 364
amalgamation process 364
bromide 367
chloride 367
coin 359
German 359
in copper ores 358
iodide 367
metallurgy 364
nitrate 366
oxide 366