204 bulletin no. 54. [March, 1899. 



solution then will contain the required amount of copper sulphate for a 

 barrel of Bordeaux mixture. 



E. Cautions. 



Be sure you know what you want to spray for before commencing 

 the operation. Be prompt: be thorough: be persistent. Use fresh 

 Bordeaux mixture, and not that which has been standing for some time 

 after mixing. Keep the ammonia and copper carbonate mixture in 

 glass-stoppered bottles, thoroughly corked, when not needed. 



Joseph Cullen Blair, 



Assistant Horticulturist. 



