m 



INDEX 



Oat hay, 123 



straw, 123 

 Oats, 122 

 Oil cakes, 133, 135. 137 



as manure, 105 

 Oils, drying and non-drying, 89 



essential, 90 



nature of, 88 

 Oleo-margarine, 205 

 Organic acids in plants, 91 

 Organic chemistry, 16 

 Orthoclase, 19, 36 

 Osmotic pressure, 77 

 Osteoporosis, 177 

 Oxidation, 9 



sloAv, 13 

 Oxygen in the air, 28 



occurrence of, 11 

 Ozone, 6, 31 



Panereatie juice, 160 



Paraffin emulsion, 233 

 Parchment paper, 86 

 Paris green, 224 

 Parsley, 146 

 Parsnips, 146 

 Pea nuts, 131 

 Pearl barley, 122 



millet, 126 

 Pears, 139 

 Peas, 131 



chick, 131 



cow, 131 

 Pectins, 86 

 Pentosans, 86 

 Pentoses, 86 

 Pepsin, 159 

 Pe chlorates in nitrate of soda 



107 

 Permanganates, 215 

 Persian insect powder, 299 

 Petroleum emulsion, 233 

 Phosphates, loss of, by drainage, 59 



Phosphatic manures, 110 

 Phosphorus, functions of, in plants, 

 92 



occurrence of, 18 

 Physical properties of air, 24 

 Pialyn, 160 



" Pickled " butter, 205 

 Pigeon dung, 102 

 Plant poisons, 233 

 Plants, 76 



action of, in soil formation, 41 

 Plasmolysis, 78 

 Plums, 139 

 Plumule, 76 

 Pop corn, 126 



Potash, loss of, by drainage, 59 

 Potash manures, 113 

 Potassium, function of, in plants, 

 93 



nitrate, 109 



occurrence of, 19 

 Potatoes, 144 



sweet, 146 

 Poultry dung, 102 

 Preservation of foods, 216 



of milk, 194 

 Prickly comfrey, 149 

 " Process " butter, 205 

 Proteids, 93 

 Protein in foods, 166 

 Ptyalin, 159 

 Pumpkins, 150 

 Putrefaction, 9 

 Pyrethrum, 229 



Quartz, 34 



Quicklime, as insecticide, 230 



Rabbits, action of, in soil forma- 

 tion, 40 

 Radicle of seedlings, 76 

 Rain water, 30 

 Rape, as fodder, 150 



