64 STORRS AGRICULTURAL EXPERIMENT STATION. 
Jaunta lime is better than that of the other makes, which is 
probably due to the smaller per cent. of calcium carbonate 
which it contains. 
Much time may be saved by making stock solutions of both 
slacked lime and copper sulphate dissolved in water. In a 
sufficiently large water-tight box slake 100 pounds of lime. 
Add water to a known amount, say 50 gallons. This stock 
solution will keep in good shape during the season, if the lime 
is kept covered with water. If the lime is allowed to become 
dry, it will become air slaked and worthless for spraying pur- 
poses. 

Fic, 19. Making Bordeaux mixture. 
In another wooden receptacle, as a 50-gallon barrel, suspend 
from the top, by running a stick through the handles, a loose 
splint basket containing 100 pounds of copper sulphate, or blue 
stone. Fill the barrel with water, and let stand. Ina day or 
two the copper sulphate will be dissolved, giving a solution of 
2 pounds of copper sulphate to each gallon of liquid. Keep the 
barrel of solution covered or add water at intervals to make up 
for loss of water by evaporation. 
