78 INSECTICIDES FOR SUCKING INSECTS 



Carbolic acid emulsion is prepared in the same manner as kerosene 

 emulsion. Dissolve 1 pound of hard soap in § gallon of boiling 

 water. Then add 1 pint of crude carbolic acid, and at once churn the 

 mixture by pumping it back on itself with a bucket pump until a 

 smooth emulsion is formed. 



This is the stock material. To prepare for use dilute at the rate of 

 1 part of the stock emulsion to 50 parts of water. 



