STATE POMOLOGICAL SOCIETr. 93 



RECIPES. 



The following recipes, taken from the United States Agricultural 

 Reports, will be referred to in this paper, and for convenience of 

 reference are given here. They have all been tried and have stood 

 the test of application. The one selected will depend upon the dis- 

 ease and the material at command. 



(1) SULPHATE OP COPPER SOLUTION. 



Dissolve one pound of pure sulphate of copper in twenty-five gal- 

 lons of water. Should not be applied to tender foliage. Can be 

 used b fore the leaves start. Can be easily prepared. 



(2) BORDEAUX MIXTURE. 



(a) Dissolve sixteen pounds of sulphate of copper in twenty- 

 two gallons of water ; in another vessel slake thirty pounds of lime 

 in six gallons of water. When the latter mixture has cooled, pour 

 it slowly into the copper solution, taking care to mix the fluids 

 thoroughly by constant stirring. 



(b) Dissolve six pounds of sulphate of copper in sixteen gallons 

 of water, and slake four pounds of fresh lime in six gallons of water. 

 When cool, mix the solutions as described above. 



This formula requires fresh lime. Air-slaked lime, or a paste 

 made by allowing freshly slacked lime to settle, contains a large 

 percentage of water ; consequently, if they should be combined in 

 the proportions indicated, there would not be sufficient lime to decom- 

 pose the copper. Experience has shown that while four or even 

 three pounds of fresh lime is sufficient to decompose six pounds of 

 copper sulphate, it requires double that quantity of air-slaked lime 

 and three times the amount of paste. 



The manner of preparing the Bordeaux mixture may be modified 

 in various ways. Colonel Pearson pulverizer the sulphate of copper, 

 and then dissolves it in from two to four gallons of hot water. The 

 lime is then slaked in the same wa}^ that masons slake it for mortar. 

 This is strained into a box, left to settle and thicken, and then com- 

 bined with the copper, adding water to the leqiiired amount. 



(3) SOLUTION OF AMMONIACAL CARBONATE OF COPPER. 



Into a vessel having a capacity of about one gallon, pour one 

 quart of ammonia (strength 22° Baume), add three ounces of car- 



