242 INDEX 



Humus, 64 sqq. 

 Hydra tion, 128 sqq. 



Inoculation, results of, 53 sqq. 

 See also Humogen, etc. 



Keeble, 158 



Kew results, 102, 140 sqq., 178 

 sqq. See also Humogen, 

 Newspaper criticisms, etc. 



Lawes, influence on agricul- 

 ture, 48 



Lees, 226 



Leguminous plants and nitro- 

 gen, 48 sqq. See also Nitro- 

 bacterine, Nitrogen-fixation, 

 etc. 



Liebig, influence on Agricul- 

 ture, 47 sqq. 



Lipman, 89 



Machen, 93, 95, 225, 227 

 Malthus and the food-supply, 4 

 Manure and auximones, 116 



decomposition of, 26 

 Moore, 101 sqq. 



Mess culture experiments, 146, 

 163 



Newspaper criticisms, 159 sqq. 

 Nitragin, 53 sqq. 

 Nitrate deposits, 4 



problem, I sqq. 

 Nitrobacterine, 56 sqq. 



and America, 137, 156 



difficulties with, 137 sqq. 



results with, 205 sqq. 

 Nitrogen as plant food, 5 



balance-sheet, 7 



fixation, 46 sqq., 88 



-fixing organisms, effects 



of, on soil, 92 

 and symbiosis, 90 

 Noble and inoculation, 53 sqq. 



Oxidation, 128 sqq. 



Pasteur and bacteria, 49 

 Peat, 31 sqq. 



Peat, a < omplete plant food, 140 



bac erization of, 87 sqq. 



comj irison with other 

 manures, 86 



decomposition of, 83 sqq. 



extract, 85 



uses of, 40 sqq. 

 Phosphates and humogen, 92 



and manure, 28 

 Phosphotungstic fraction. See 



Auximones 



Plant inoculation. See Inocu- 

 lation 

 Potash and humogen, 92 



and manure, 28 

 Prazmowski and inoculation, 53 

 Proteids, 133 

 Protozoa, 29 



Reduction, 128 sqq. 

 Rice. See Deficiency diseases 

 Root-nodules. See Legumin- 

 ous plants 



Rosenheim, 102 sqq., 158 

 Rothamsted, 48 sqq. 



Schloesing and Miintz, experi- 

 ments, 49 



Scurvy, 101 sqq. 



Silver fraction. See Auxi- 

 mones 



Standard bread, 102 sqq., 118 



Starling and chemistry of the 

 blood, 98 



Sterilization of soil, 153 



Symbiosis and nitrogen-fixing 

 bacteria, 90. See also 

 Leguminous plants 



Van Bemmelen and humus, 80 

 Vitamines, 94, 96 sqq. 

 Voelcker on peat, 44 

 Vordermann and beriberi, 99 



Ward and nodule formation, 52 

 Watson- Wemyss, 100 sqq. 

 Weathers, experiments, 148, 



149 



Wheat. See Food-supply ^ 

 Winogradsky, 89 



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