Pi.\TE 3. — Arsenite of Copper on Wlieat. Season 1914. 



(a) No treatment ; (b) .10 per cent. ; (c) .05 per cent. ; (d) .02 per cent. ; (e) .01 per cent, 

 (f) .005 per cent, of Copper respectively in soil. 



Plate 4. — Arsenite of Copper on Wheat. Sea>son 1914. 

 Roots of plants in Plate 3. 



(a) No treatment ; (c) .05 per cent. ; (d) .02 per cent. ; (e) .01 per cent. ; (f) .005 per 

 cent, of Copper respectively in soil. 



