20 INTRODUCTION. 



may advantageously be diluted with six or eight 

 parts of flour. It is especially excellent for clearing- 

 rooms of flies and mosquitoes, and for killing the 

 common cabbage worms. It is practically harmless 

 to man and the higher animals. 



Kerosene Emulsion is prepared by adding two parts 

 of kerosene to one part of a solution made by dissolv- , 



ing half a pound of hard soap in one gallon of boil- / ^ L 

 ing water, and churning the mixture through a force v 



pump with a rather small nozzle until the whole 

 forms a creamy mass, which will thicken into a 

 jelly-like substance on cooling. The soap solution 

 should be hot when the kerosene is added, but of 

 course must not be near a fire. The emulsion thus 

 made is to be diluted, before using, with nine parts 

 cold water. This substance destroys a large number 

 of insects, such as the Chinch Bug, Cabbage Worm, 

 and White Grub ; and is a comparatively cheap and 

 eflective insecticide. 



Besides its use as an emulsion, kerosene alone is 

 frequently used for various pests. It is especially 

 valuable in destroying vermin on domestic animals, 

 and in hen houses. 



Carbolic Acid, especially in its crude state, is valu- 

 able for various insecticidal purposes. An excellent 

 wash for preventing the injuries of several tree borers 

 is made by mixing one quart soft soap, or about a 

 pound of hard soap, with two gallons water, heating 

 to boiling, and then adding a pint of crude carbolic 

 acid. Carbolic acid soaps are largely used for de- 

 stroying vermin on domestic animals. 



