Molybdic acid 388

Monazite sand 377

Mordants 333

Morphine 418

Mortar 304

Moth balls 418

Muriatic acid 182

Naphthalene 418

Naphthas 400

Nascent state 182

Natural gas 219
sciences 1

Neon 80

Neutralization 108
a definite act 109
definition 109
heat of 109
partial 111

Niagara Falls 269, 329

Nickel 354
coin 359
compounds 354
plating 354

Nicotine 419

Nitrates 131

Nitric acid, 128
action on metals 130
decomposition 129
oxidizing action 130
preparation 128, 140
properties 129
salts 131

Nitric oxide 133

Nitrites 132

Nitrobenzene 417

Nitrocellulose 415

Nitrogen 78
compounds 122
in air 87
occurrence 78, 122
oxides 132
preparation 78
properties 80

Nitroglycerin 409

Nitrosulphuric acid 155

Nitrous acid 132
oxide 132

Non-metals 165

Oil of myrbane 417
of vitriol 154

Oleic acid 408

Olein 409

Oleomargarine 410

Onyx 260

Opal 260

Open-hearth process 346

Opium 418

Ores 267

Organic bases 412
chemistry 201, 397
matter, decomposition 122

Orpiment 246

Orthoarsenic acid 250

Orthophosphates 244

Orthophosphoric acid 244

Orthosilicic acid 261

Osmic acid 393

Osmium 393
tetroxide 393

Oxalic acid 407

Oxidation 17, 353
definition 18

Oxidizing agent 37

Oxygen 13
and ozone 22
commercial preparation 16
history 13
importance 21
in air estimation, 85
in air function, 84
occurrence 13
preparation 13
properties 16
standard for atomic weights 66
two atoms in molecule 227

Oxyhydrogen blowpipe 37

Ozone 21, 137

Palladium 390

Palmitic acid 407

Palmitin 409

Paraffin 400

Paris green 250

Parkes's method for silver 364

Pearls 305

Perchloric acid 187

Periodic acid 194

Periodic division 166
groups 167
law 169
law, imperfections 172
law, value 171
table 168
table, arrangement 166

Permanent hardness 310

Permanganates 381

Permanganic acid 381

Peroxides 278

Petroleum 399

Pewter 372

Phenol 417

Philosopher's stone 9

Phlogiston 19

Phosphates 245

Phosphine 242

Phosphonium compounds 243

Phosphoric acid 244

Phosphorite 239

Phosphorous acid 244

Phosphorus 239
acids 243
family 238
hydrogen compounds 242
occurrence 239
oxides 243
preparation 239
properties 240
red 241
yellow 240

Photography 367

Physical changes 2
properties 3