The Book of the 

 Rothamsted Experiments 



BY A. D. HALL, M.A. (OXON.), F.R.S. 



SECOND EDITION 



REVISED BY E. J. RUSSELL, D.Sc., F.R.S, 



DIRECTOR OF THE ROTHAMSTED EXPERIMENTAL STATION 



NEW YORK 



E. P. BUTTON AND COMPANY 

 1917 



