12 Indian Museum Notes. [Vol. IV. 



an hour. The leaves may be injured if used during the middle of 

 the day. 



For insects in general use KEROSINE EMULSION, as 

 follows : Make a soap solution of half a pound of soap to a gallon of 

 water. Heat it to boiling and add two gallons of kerosine. Pump 

 it through the spray pump, with good pressure, for five or ten min- 

 utes. For use add ten times as much water as you have of emulsion. 

 Apply as a spray. Sour milk may be used instead of the soap solu- 

 tion. The emulsion is made more effective by the addition of a very 

 small amount of arsenic to the soap solution, or of buhach to the 

 kerosine, 



FOR fruit or ieaf-eating INSECTS use PARIS GREEN or LON- 

 DON PURPLE as a powder at the rate of i to 5 pounds to the acre, 

 distributed by walking or riding over the field, carrying a pole, at both 

 ends of which are hung muslin bags containing the poison. Asa 

 spray use i pound to 200 gallons of water. In spraying these ar- 

 senites the nozzle should be held at some distance from the plant 

 and no more should be applied after the leaves begin to drip. Do 

 not use these on crops where the poison would be injurious to 

 health. 



