268 



INDEX 



Nitrogen, boiling point of, 77 



fertilizers, 83 



fixation, 77, 228 



for oats, 11, 216 



for tomatoes, 11 



from air by copper, 79 



in air, 77 



in coal, 48, 59 



in gas lime, 56 



in guano, 31 



in soil increased by phosphates, 17 



per-oxide, 100 



unit price, 195 

 Nitrous acid, 101, 104 

 Non-inflammable extractives, 74 

 Norfolk four-course rotation, 199, 203 

 Normal superphosphate, 142 

 North African phosphates, 38, 182 

 Norwegian fish manure, 114 



phosphates, 30 

 Nottingham gypsum, 45 

 Nova Scotian gypsum, 45 

 Nutritious pastures, 17 



OATS, acreage of, 130 



phosphates for, 130 

 Obnoxious gas, 112, 151, 174 

 Oceanian phosphates, 28, 36 

 Oceanic salt, 172 

 Octagonal sieve, 138 

 Oil cakes, 107 



of vitriol, 132 



presses, 107 

 Ontario apatite, 28 

 Organic matter in superphosphates, 

 149 



parasiticides, 249 

 Ortho-phosphoric acid, 118, 146 

 Osmosis, 3, 5 



Oxidation of ammonia, 102 

 Oxygen, boiling point of, 77 



needed by plants, 2 



PALACE LEAS, 221 

 Paper sacks, 159 

 Paraffin, 251, 254 



oil smell, 27, 149 

 Parasiticides, 239 

 Parke, 223 

 Parrish, 159 

 Parry, 258 



Parsnip grub destroyers, 251 

 Partington, 70, 82, 159, 172, 257 

 Pasture, acreage of, 130 



manures for, 130, 221, 222 



phosphates for, 130 

 Patagonian phosphates, 34 

 Pauling arc nitrate furnace, 99 

 Peace river phosphates, 28, 32 



Peas, acreage of, 130 

 Peat, distillation of, 54 



soils, 201, 211, 220 

 Peath, 171 

 Pepper, 254 

 Perkin, 60 

 Permanganate, 160, 245 



disinfectants, 248 

 Permian limestone, 43, 63, 69 

 Persian insect powder, 254 

 Perthio-carbonates, 249 

 Peruvian guano, 30, 71 



phosphates, 34 

 Petra, 178 

 Petroleum, 251, 254 



naphtha, use of, 73, 108, 111 

 Phase rule, 162, 172 

 j Phases in superphosphate, 142 

 Phenol, use of, 251 

 Phosphate deposits, 30 



of magnesia, 147, 173 

 Phosphates and root growth, 12 



citric soluble, 122, 155 



use of, for nitrogen fixation, 80 

 Phosphatic fertilizers, 118, 202, 227 

 236 



manuring, results of, 14 



nitrate, 155 



nutrition of plants, 21 



acid, 118, 145 

 Phosphorus compounds, 118 



in iron, 63 



oxides, 118 



pentoxide, 118 



Physical improvement of soil, 13, 

 189 



properties of superphosphate, 149, 



155, 174, 220 

 Pickering, 248 

 Picraena excelsa, 253 

 Pictet process for nitrogen, 78 

 Pieper, 33 



Pilot spark arc furnace, 98 

 Plant disease, 202, 239 



food, 6 



growth, 1 



tissue, formation of, 2 

 Plasmolysis, 5 

 Platinum catalyst, 102 

 Ploughing, benefits of, 2 

 Poisonous fumes from superphos- 

 phate, 141, 174 

 Poisons, 239 

 Pollen insecticide, 254 

 Polyhalite, 40 

 Polysulphide sprays and washes, 246, 



248 



! Pope, 232 

 i Poppies killed by sulphuric acid, 135 



