GARDEN AND ORCHARD SPRAYS 257 



join in making up a Bordeaux mixture, substituting one 

 ounce for each pound of the ingredients in the formula, and 

 a corresponding amount of water. What is the color of the 

 compound ? Will it keep indefinitely if covered to save evap- 

 oration? Spray a few trees on school ground. 



3. Make a lime-sulphur mixture, reducing the amounts 

 as before to one ounce for each pound of ingredients. 



4. Make up a kerosene emulsion, using one pint of 

 kerosene and a corresponding amount of other ingredients. 



5. Secure catalogues describing spraying machines, ex- 

 amine the different makes, and decide which is best for 

 the use you would require in your home garden #nd or- 

 chard. If uncertain write your state agricultural college 

 about it. 



