109 



chiefly by strong offensive odors. Some of 

 those that have proved effectual, are the odor 

 ofchamomile, that of coal-tar from the gas 

 works, the vapor from oil of turpentine, &c. 



Insects may be killed, by liquid applications. 

 The best liquids yet known for this purpose 

 are tobacco water, and diluted whale oil soap. 



Tobacco water is made by boiling any 

 refuse tobacco in water. It must not be 

 excessively strong. 



The whale oil soap is prepared, by mixing 

 one pound of it with seven or eight gallons of 

 water. These liquids may be applied to 

 plants, with a water-pot, or a syringe having 

 a water-pot rose upon the end of it so as to 

 scatter the water more effectually. 



Half a pound of quassia, boiled a few 

 minutes in six quarts of water, is a liquid 

 said to be quite as efficacious as the tobacco- 

 water. 



All plant lice and almost all small insects, 

 can be killed, by the application of either of 

 the'se liquids. A mixture of them might 

 possibly be even more effectual than either 

 used by itself. Strong suds made of common 

 soap answers tolerably well, in many cases. 



Much has been accomplished, by kindling 

 7 



