82 CHEMICAL FERTILIZERS 



Many attempts have been made to fix nitrogen commerci- 

 ally by the aid of bacteria without much practical success. 



REFERENCES TO SECTION VI. 



NITROGEN FIXATION BY BACTERIA : 



Berthelot, " Fixation directe de 1'azote atmospherique libre par 

 certains terrains argileux," Compt. Rend., 1885, ci., 775-84 ; " Recher- 

 ches nouvelles sur la fixation de 1'Azote, par la terre vegetale et les 

 plantes, et sur 1' influence de 1'electricite sur ce phenomene," Ann. 

 Chim. Phys., 1890, Series 6, xix., 434-92. 



Bouilhac, " Sur la fixation de 1' Azote atmospherique par 

 1'association des aglues et des bacteries," Compt. Rend., 1896, cxxiii., 

 828-30. 



Golding, " The Importance of the Removal of the Products of 

 Growth in the Assimilation of Nitrogen by the Organisms of the Root 

 Nodules of Leguminous Plants," Brit. Ass. Rpts., 1910 ; " The Nature 

 of Nitrogen Fixation in the Root Nodules of Leguminous Plants," 

 Brit. Ass. Rpts., 1910. 



Hall, " On the Accumulation of Fertility by Land allowed to Run 

 Wild," Journ. Agric. Science, 1905, i., 241-49; " The Soil," p. 161. 



Lawes and Gilbert, " The Sources of the Nitrogen of our Leguminous 

 Crops," Journ. Roy. Agric. Soc., Series 3, ii., 657-702. 



Dory land, " Possibility of obtaining Nitrogenous Fertilizers by 

 Utilizing Waste Materials for the Fixation of Nitrogen by Nitrogen- 

 fixing Bacteria," Journ. Soc. Chem. Ind., 1919, p. 381 A. 



INDUSTRIAL FIXATION OF NITROGEN : 



Inglis and Coates, " The Density of Liquid Nitrogen and Liquid 

 Oxygen and their Mixtures," Journ. Chem. Soc., 1906, p. 886 ; Journ. 

 Soc. Chem. Ind., 1906, p. 149. 



Cottrell, " Liquefaction of Gases," Journ. Soc. Chem. Ind., 1919, p. 

 124 T. 



Engels, "Production of Hydrogen by the interaction of Carbon 

 Monoxide and Calcium Hydroxide, etc." Journ. Soc. Chem. Ind., 



, P. 753 A. 

 cher, 



Bucher, " Fixation of Nitrogen," Journ. Soc. Chem. Ind., 1917, 



P- 45i. 



Maxted,'" The Synthesis of Ammonia and the Oxidation of Ammonia 

 to Nitric Acid," Journ. Soc. Chem. Ind., 1917, p. 777. 



Synthetic Ammonia by the Haber Process, and a comparison of 

 the various Nitrogen Fixation Processes is discussed at some length by 

 Partington in "The Alkali Industry," in this series, to which the reader 

 is referred for a fuller bibliography. 



