480 



INDEX 



Nitrates, tests for, 195 

 Nitric acid, 189, 190 

 Nitrogen, 47, 53 



in fertilizers, 279 



in soil, 275, 277, 279 

 Nitroglycerine, 54 

 Nodes, 289 

 Noise and tone, 170 

 Nose, 383 

 Nucleus, 303, 313 

 Number of elements, 107 



Obsidian, 288 

 Oils, 198, 349 

 Oleic acid, 361 

 Opaque bodies, 150 

 Opium, 367 

 Ores, 112 

 Organs, 3 

 Ounce, 12 

 Ovary, 298 

 Ovule, 298 

 Oxidation, 48, 52 

 Oxides, 48 



of metals, 190 

 Oxygen, 46, 49, 50, 95, 96, 164 



in soil, 275 

 Oyster, 319 



Paint, 112, 203 

 Palate, 354, 384 

 Pancreas, 357, 359 

 Paper, 116 

 Papillae, 389 

 Paraffin, 115, 204 

 Paramecium, 314 

 Parasite, 303 

 PateUa, 344 

 Patent medicines, 367 

 Pearls, 320 

 Pelvis, 343 

 Penumbra, 153 

 Pepsin, 356, 359, 361 

 Peptones, 359, 362 

 Percussion, 22 

 Pericardium, 373 

 Periosteum, 340 

 Perspiration, 71, 389, 391 

 Petiole, 285 



Petroleum, 114 

 Phalanges, 344 

 Pharynx, 353, 383 

 Phenomena, 2 

 Phosphates, 278, 340 



tests for, 195 

 Phosphoric acid, 189 

 Phosphorus, 53, 210 



in soil, 275, 277 



oxide, 53 



sulphide, 211 

 Photography, 195 

 Photometer, 154 

 Physical changes, 94, 265 

 Physical states of matter, 65 

 Physiology, 338 

 Pisa, Leaning Tower of, 19, 20 

 Pistil,* 298 

 Piston, 23, 42 

 Pitch, 170, 386 

 Pith, 291 

 Planets, 27 



Plants, 57, 266, 282, 283, 301, 307 

 Plasma, 377 

 Plaster, 123 

 Platinum, 96 

 Plexus, 401 

 Plowing, 271 

 Plumbing, 209 

 Plumbline, 20 . 

 Plumule, 285 

 Pneumatic hammer, 44 

 Pneumonia, 448 

 Polaris, 10 

 Poles of battery, 96 

 Pollen, 297, 298 

 Polyps, 315 

 Pons, 399 

 Porcelain, 260 

 Potash, 191 

 Potassium, carbonate, 191, 194 



chlorate, 49 



chloride, 191 



hydroxide, 192, 194 



in fertilizers, 278 



in soil, 275, 277 



permanganate, 50 



salts, tests for, 1 96 

 Pound, 12 



