New York Agricultural Experiment Station. 339 



arsenite of lead. 



Acetate of lead 4 pounds. 



Arsenite of soda 12 ounces. 



Water 50 gallons. 



This is prepared in the same manner as arsenate of lead. 



WHALE OIL .SOAP. 



This is a rather inexpensive spray for elongated scales, plant lice 

 and other soft-bodied insects. It may be used on foliage at the rate 

 of I pound in 7 gallons of water. It is an expensive remedy for 

 San Jose scale but is convenient for the treatment of a few trees. 

 For this purpose use during the dormant season at the rate of 2 

 pounds in one gallon of water. Use only best quality of soap. 



RESIN-LIME SOAP. 



Pulverized resin 5 pounds. 



Concentrated lye i pound. 



Fish oil, or any cheap animal oil except tallow i pint. 



Water 5 gallons. 



Place oil, resin and a gallon of water in an iron kettle and heat 

 until resin is softened ; add lye solution made as for hard soap ; stir 

 thoroughly; add remainder of water and boil about two hours, or 

 until the mixture will unite with cold water making a clear, amber- 

 colored liquid. If the mixture has boiled away too much, add suffi- 

 cient boiling water to make 5 gallons. 



For use, i gallon of this stock solution is diluted with 16 gallons 

 of water and afterward 3 gallons of milk of lime or whitewash 

 added. The resin mixture is in reality a liquid soap and the addition 

 of the lime turns it to a hard soap which remains suspended in the 

 water in minute particles. The poison, Y^^ pound of paris green or 

 other arsenite, is then added, and the particles of poison adhere to 

 the finely divided soap particles and are thus distributed throughout 

 the mixture in minute and uniform quantities. The soap solution 

 is very adhesive and thus a thin film of poison is made to stick to 



