16 



A, D. Hall. ''The Rothawsted Experimental Station, 1843- 

 1911. Trans. Highland and Agric. Soc, J912. 24. 



''Recent Advances in Agricultural Science ^ "The 

 Fertility of the vSo//." Royal Institution of Great Britain, 

 May 24th, 1912. 



H. B. Hutchinson and N. H. J. Miller. "TJie Direct 

 Assimilation of Inorganic and Organic Fort}is of Nitrogen 

 by higher Plants.'' Journ. Agric. Science, 1912. 4. 



(An extension of the experiments reviewed in the last Report). 



E. J. Russell. "Soil Conditions and Plant Growth.'" 

 Longmans & Co. 



