88 LECTURE V. 



Corenwinder ; Ann. d. Chim. et de Phys., sdr. 3, LIV, 1858. 

 Moll; Landwirthsch. Jahrbiicher, VI, 1877. 



Absorption of Nitrogen. 



Woodhouse; Nicholson's Journal, II, 1802; Gilbert's Annalen, xiv, 



1803. 



Boussingault ; Agronomic, I, 1860. 

 Lawes, Gilbert, and Pugh ; Phil. Trans., 1860. 



Absorption of Ammonia. 



Ville; Recherches experimentales, 1853. 

 Boussingault; Agronomic, I, 1860. 

 Sachs ; Jahresbericht f. Agrikulturchemie, III, 1862. 

 Mayer; Landwirthsch. Versuchsstat., xvn, 1874. 

 Schlosing ; Comptes Rendus, t. LXXVill, 1874. 



