Figure 2. — Cucumber Plants Sprayed with Bordeaux and Gassed witti HCN. 

 A, Bordeaux 4-1-50; B, l-i^-50; C. Control, gassed only. Note that neither Bordeaux 4-1-50 nor 

 Bordeaux l-M-50, which contains an excess of lime but only one-fourth as much copper sulfate, 

 is safe with gas. 





Figure 3. — Cucumber Plants Sprayed with Bordeaux and C.assed with HCN. 

 A, sprayed with filtrate of neutral Bordeaux 4-X-5(): B, Control gassed only: C. sprayed with 

 washed residue of neutral Bordeaux 4-X-50; I), complete spray of neutral Bordeaux 4-X-.")0. The 

 incompatible component of the spray is in the washed residue and not in the clear filtrate. 



