Materials and Formulas. 171 



preparation combines certain properties of those insecticides 

 which kill by contact, and those which are first eaten. It 

 possesses value for all insects, but only soft-bodied organisms 

 are overcome by the soap. Kerosene emulsion or the resin 

 washes are commonly to be preferred. The lime is added to 

 the preparation to prevent injury. 

 SOAP AND FISH-OIL. 



Potash lye 1 pound. 



Fish-oil 3 pints. 



Soft water 3 gallons. 



First dissolve the lye in the water by boiling, then add the 

 oil and boil two hours longer. Dilute with 6 to 10 gallons of 

 water to every pound of the soap which is formed. The 

 mixture is especially valuable for destroying soft-bodied 

 insects. 



SOAP AND LIME WASH. 



(a) Potash 5 pounds. 



Lard 5 " 



Boiling water 5 gallons. 



(6) Quicklime 1 peck. 



Boiling water 5 gallons. 



When (a) and (b) have been thoroughly acted upon by the 

 hot water, mix the two liquids. Dilute before using by adding 

 2 gallons of boiling water to each gallon of the mixture. This 

 preparation has been recommended for borers, but it is of 

 doubtful value. 



SOAP AND SODA WASH. Add a strong solution of common 

 wash soda to soft soap until the latter thickens to a thick paint. 

 The mixture is of value in destroying bark lice and similar 

 insects. 



SOAP AND TOBACCO. 



Soft soap 8 pounds. 



Kain water (warm) 12 gallons. 



When this has cooled, add 



Strong tobacco decoction 1 gallon. 



This has been recommended for the destruction of soft-bodied 

 insects, and undoubtedly possesses considerable value. 



