vi CONTENTS 



CHAPTER VI 

 Phosphorus 



PAGE 



Origin of Phosphate Rock, Basic Slag, Bone Meal, Ammo- 

 nium Sulphate, Sodium Nitrate, Organic Nitrogenous 

 Materials, Potash and Guano 52 



CHAPTER VII 

 Artificial Manure Manufacture 



Phosphatic Manures Mineral Phosphates Superphos- 

 phates Precipitated Phosphates Mixed Manures. . 60 



CHAPTER VIII 

 Manufacture of Superphosphate 67 



CHAPTER IX 

 Compound Manures 77 



CHAPTER X 

 Nitrogenous Manures 87 



CHAPTER XI 



The Fixation of Atmospheric Nitrogen, Manufacture of 

 Cyanamide and Nitrate of Lime. Experiments with 

 Cyanamide 95 



CHAPTER XII 



Potassic Manures. Manufacture from Crude Salt. Manu- 

 facture from Feldspar. Manufacture from Sunflower 

 and Kelp Plants 101 



CHAPTER XIII 



On the Examination of Commercial Fertilizers and Ma- 

 terials 126 



CHAPTER XIV 

 On the Examination of Soils. . .139 



