The Canadian Horticulturist. 



157 



foliage more healthy than that of the trees unsprayed. This success, however, 

 can only be attained by early and faithful application, for the action of the poison 

 is largely preventive by destroying the life germs as they germinate, and by 

 coating over the fruit and foliage so that they become impenetrable by spores of 

 diseases. He also found an increasing benefit year by year from spraying, 



^.MM^i 



Fui. C5.5.— Tkof. L. H. Bailly 



because the disease germs seem to grow gradually less in number. The recipe 

 for making Bordeaux mixture, given by Prof Beach as the latest, was as follows : 

 Dissolve four pounds of copper sulphate in water, nearly filling a forty- five 

 gallon cask. Next make a whitewash or cream of freshly slaked lime. Have on 

 hand a small bottle containing a saturated solution of yellow prussiate of potash 

 (ferro-cyanide of potassium) in water. As you add the lime to the copper sul- 



