CHAPTER XLII. 

 FORMULAS FOR SPRAYING MIXTURES. 



BORDEAUX MIXTURE, FORMULA (1). 



For Fungi. 



Copper sulphate 6 pounds. 



Unslacked lime 4 pounds. 



Water 50 gallons. 



Place the six pounds of copper sulphate in a coarse 

 sack and suspend it in a barrel containing twenty-five 

 gallons of water. Hang it from a stick laid across the 

 barrel, so that it is just covered by the water. In this 

 way, the copper sulphate will dissolve much more read- 

 ily than if it be simply thrown into the barrel. Slack the 

 lime in a wooden bucket by adding water, a little at a 

 time, and reduce the whole to a thin paste. Then place 

 the paste in a second barrel in twenty-five gallons of 

 water. Allow sufficient time to cool, then agitate thor- 

 oughly before attempting to mix the two solutions. In 

 pouring the copper sulphate and lime solutions together 

 into the barrel of the spray pump, dip out a bucketful 

 from each and pour them together in a united stream, 

 at the same time thoroughly agitating the mixture in the 

 pump barrel. This method will secure a mixture of the 

 finest quality. 



If a large amount of spraying is to be done, stock 

 solutions of copper sulphate should be prepared. In a 

 barrel holding fifty gallons of water, suspend a sack con- 

 taining 100 pounds of copper sulphate. After the sul- 



