"Inorganic Plant Poisons and Stimulants," by Winifred E. 

 Brenchley, 1914. The University Press, Cambridge. 9/- 



"The Manuring of Grassland for Hay," by Winifred E. 

 Brenchley, D.Sc. Longrnans, Green & Co., 39 Paternoster 

 Row, London, E.C.4 (in the press). 



"A General Textbook of Entomology," by A. D. Imms, 

 D.Sc. Methuen & Co., Essex Street, Strand, London, 

 W.C.2 (in the press). 



The following- are obtainable from the Secretary, Rothamsted 

 Experimental Station, Harpenden, Herts : — 



"Agricultural Investigations at Rothamsted, England, 

 during a period of 50 years," by Sir Joseph Henry 

 Gilbert, M.A., LL.D., F.R.S., etc., 1895. 3/6 



"Six Lectures on the Investigations at Rothamsted 

 Experimental Station," by Robert Warington, F.R.S., 

 1891. 2/- 



"GUIDE TO THE EXPERIMENTAL PlOTS, RoTHAMSTED EXPERI- 

 MENTAL Station, Harpenden." 1913. John Murray, 

 50 Albermarle Street, W. 1/- 



" Plans and Data of the Experimental Plots." 1923. 6d. 



For use in Farm Institutes 



"A Student's Book on Soils and Manures," by E, J. Russell, 

 1919. The University Press, Cambridge. 8/- 



For use in Schools 



"Lessons on Soil," by E. J. Russell, 1912. The University 

 Press, Cambridge. 3/- 



For General Readers 



"The Fertility of the Soil," by E. J. Russell, 1913. The 

 University Press, Cambridge. 4/- 



" Personal Reminiscences of Rothamsted Experimental 

 Station," 1872-1922, by E. Grey, Superintendent of the 

 Experimental Fields. 5/-. Obtainable from the Secretary, 

 Rothamsted Experimental Station, Harpenden, Herts. 



