13S FACTS A.\D FIGURES OR THE 



ing in most cases, may be made by dissolving 36 pounds of 

 blue vitriol in 36 gallons of water. For each barrel of Bor- 

 deaux use 2 or 6 gallons of this solution, according to the 

 plants to be sprayed. Keep this stock solution tightly cov- 

 ered to prevent evaporation. In the same way 36 pounds of 

 cjuick lime may be slacked in as many gallons of water, and 

 used as the copper solution ; or it may be slacked with just 

 enough water to make a putty, which will keep indefinitely 

 if covered with water, and is to be used with the ferro-cyan- 

 ide test; if the lime in the Bordeaux mixture is deficient a 

 drop of saturated solution of ferro-cyanide of potassium, 

 added to the mixture, will turn brown. Add lime till the 

 drop remains colorless and the mixture is ready to use. 



AMMONIACAL COPPER CARBONATE. 



Copper carbonate - 5 ounces 



Ammonia (26° Beaume) about - 3 pints 



Water 45-50 gallons 



Make a paste of copper carbonate with a little water 

 and dilute the ammonia with 7 to 8 volumes of water. Add 

 the diluted ammonia to the paste, but be careful to use only 

 enough to dissolve all the copper carbonate. Allow the so- 

 lution to settle and use only the clear blue liquid. This 

 loses strength on standing in open vessels, but may be kept 

 indefinitely in a stoppered bottle. For spraying dilute to 45 

 to 50 gallons. 



LIME-SULPHUR SOLUTION. 



For winter and early spring use. 



Quick Lime 20 pounds 



Sulphur 15 pounds 



AVater to make 50 gallons 



Boil one to two hours with a small quantity of water, 

 then dilute to 50 gallons with boiling water. Do not let 

 mixture become cold. Spray while yet warm. 



