178 CHEMICAL FERTILIZERS 



since bone meal can be added to superphosphate to any extent 

 that may be needed. 



REFERENCES TO SECTION V. 



Fritsch, " The Manufacture of Chemical Manures," pp. 186-190 

 (Scott and Greenwood). 



Aita, " Rational Preparation of Superphosphate," Journ. Soc. Chem. 

 Ind., 1919, p. 230. 



Wright, " Standard Cyclopedia of Modern Agriculture," ii. p. 183 

 (Gresham). 



Ingle, " Manual of Agricultural Chemistry," p. 136 (Scott, Greenwood). 



Stoplasa, Duchacek and Petra, " The Influence of Bacteria on the 

 Decomposition of Bone," Journ. Chem. Soc., 1903, A. ii. p. 169. 



Jodlbauer, " Fluorine in Bone and Teeth," Journ. Chem. Soc., 1903, 

 A. ii. p. 311. 



Bottcher, " Can the Availability of Bone Meal Phosphoric Acid be 

 Increased by Application of Ammonium Sulphate ? " Journ. Chem. Soc., 

 1907, A. ii. p. 295. 



Chardet, " The Nitrogenous Substances Present in Bone Superphos- 

 phate," Journ. Chem. Soc., 1910, A. ii. p. 652. 



Gassmann, " Chemical Investigations of Healthy and Rachitic Bones," 

 Journ. Chem. Soc., 1911, A. ii. p. 129. 



