Figure 4. — Cucumber Plants Sprayed with Normal and Basic Copper Acetates and 

 Gassed with HCN. 

 A, a 0.5 per cent solution of basic copper acetate (34.4 per cent Cu) ; B, a 0.34 per cent solution 

 of basic copper acetate (48 per cent Cu); C, a 0..54 per cent solution of normal copper acetate 

 (31.8 per cent Cu). Right, gassed with HCN: left, not gassed. 



