TOO 



BIOLOGICAL PROBLEMS 



while the low rent and poor farming are associated 

 with land that is poor. 



An educational campaign may do something to 

 lessen the differences revealed in the table, but we 

 must not expect too much from it; there is a real 



Acres 



2,800,000 

 2,.70O,OOO 

 2.6OO.OOO 



1,500,000 



1,000.000 



500,000 



Increases in Areas under Corn and Potatoes, 1917 and 1918, England and Wales. 

 The figures in the columns ( + 35 %, &c.) show the extent of the increase since 1916 



difference in the conditions under which the best and 

 the average men work, which can only be bridged if 

 at all by careful scientific investigations, directed 

 first and foremost to the discovery of the factors 

 concerned, and, secondly, to the enquiry whether it 

 is possible to control them in any way. 



