INDEX 251 



PAGE 



Nitrogen, inorganic sources, calcium nitrate 130 



ammonium sulphate 132 



organic sources 132 



dried blood 132 



ground fish 132 



tankage 132 



Peruvian guano 133 



hoof meal 133 



hides, horns, hair, etc 133 



wool 133 



bone 134 



cottonseed meal 134 



rapeseed meal 134 



linseed meal 134 



castor pomace 134 



calcium cyanamide 135 



Nutrition, animal 174 



Oils, drying 225 



Oleomargarine 210 



Osmosis 71 



Oxidation 7 



Oxygen 32 



importance of 66 



Paints 225 



driers 226 



mixing 229 



Petroleum 233 



Phosphate, bone 107 



Phosphoric acid, reverted 107 



Phosphorus 38 



presence in the soil 107 



as a limiting factor 108 



commercial sources 108 



phosphate rock 110, 118 



acid phosphate 112 



Thomas' phosphate 114 



bone 114 



mineral phosphate 115 



phosphatic guanos 116 



purchase and application 1 17 



Photosynthesis 73 



Pigments, white lead 226 



sublimed. . . 226 



