INDEX 



36] 



Oxygen, function of, in plant, I 



for germination, 19 



how it gels into blood, 316 



in soil, 162, 164 



used by man, 13 I 

 ( )xyhaemoglobin, 313 

 Oyster shells as source of lime, 247 



Palmitic acid, 74 

 Palmitin, definition of, 75 

 Pancreatic juice, 331 

 Paper, 71 

 Paraform, 294 

 Paris green, 285 



use of, with Bordeaux mixture, 

 293 

 with lime-sulphur, 290 

 Pasteurization of milk, 346 

 Peanut oil, 78 

 Peat soils, 190 

 Pectins, 72 



Pentacalcium silico-phosphate, 227 

 Pentosans, 71 

 Pepsin, 330 



Persian insect powder, 290 

 Phosphate fertilizers, 221 

 Phosphoric acid, citrate soluble, in 

 fertilizers, 278 

 importance of, in fertilizers, 



221 

 reverted, in fertilizers, 278 

 total, in fertilizers, 278 

 water soluble, in fertilizers, 

 278 

 Phosphorus, changes of, in farm 

 manure, 262 

 compounds in animal, 321 

 function of, in plant, 41 

 loss of, in farm manure, 263 



prevention of, 264 

 minerals, 164 

 in soil, solution of, 165 

 Pinene in oil of turpentine, 86 

 Plant, composition of, 27 

 food, available, 26 

 definition of, 26 

 how absorbed by plant, 29 

 in soil, 198 

 unavailable, 26 

 Plasma, 313 

 Plaster of Paris, 169 



Polariscqpe, 52 



Polarized light, 51 

 Polysaccharides, 63 

 Potash, equivalent to sulphate, 279 

 fertilizers, 231 



importance of, in fertilizers, 231 

 manure salt, 233 

 salts, effect of, on fertilizer mix- 

 tures, 203 

 use of, with farm manure, 266 



Potassium carbonate in soils, 168 

 in wood ashes, 236 

 changes in farm manure, 282 

 chloride as a fertilizer, 233 

 compounds in animal, 322 

 cyanide, use in making hydro- 

 cyanic acid gas, 287 

 function of, in plant, 42 

 loss in farm manure, 263 

 prevention of, 264 

 minerals in the soil, 166 



solution of, 168 

 myronate in oil of mustard, 83 

 sulphate as a fertilizer, 235 



Preservatives, use with farm man- 

 ure, 266 



Press cake, 73 



Pressure of air, 131 



Products of oxidation in seeds, 20 



Proteases, 23 



Protein, function of, in plant, 37 

 manufacture of, by plant, 36 

 transfer of, in plants, 37 



Proteins, 21 



absorption of, into body, 393 



composition of, 94 



digestion of, in intestines, 331 



in stomach, 330 

 functions of, in animal, 334 

 in milk, 344 

 properties of, 94 



Protoplasm, 37 

 composition of, 37 



Ptyalin, 328 



Pyrethrum, 290 



Pyroxylin, 69 



Quartz, 171 

 Quebracho, 102 

 Quicklime as fertilizer, 248 

 Quinine, 99 



