ADDENDA 575 



One point strongly insisted upon is that home-made Bordeaux 

 mixture is much superior to any preparation at present on the 

 market. The formula recommended is as follows : 



Copper sulphate ('bluestone'), . . 4 pounds. 

 Quicklime (in lumps), .... 4 pounds. 

 Water, . .... 50 gallons. 



In purchasing copper sulphate, 98 per cent, purity should 

 be insisted upon. The lime should be quicklime, in lumps, 

 as freshly burnt as possible. Powdered, air-slaked lime will 

 not make Bordeaux mixture. Spraying machines, nozzles, 

 etc., are discussed, and the forms best adapted for special 

 requirements are indicated. It is imperative that the spray 

 should be very fine and misty, otherwise unsatisfactory results 

 follow. 



Salmon, E. ^^Journ. Bd. Agric.^ January 1910. 



