strength will kill a large percentage of the hibernating females with- 

 out injury to the plants. 



If a good naphtha soap can be obtained the preparation of the emul- 

 sion will be simplified. It will be unnecessary to heat the solution, 

 since the kerosene will combine readil}' with the naphtha and soap and 

 form a perfect, cold, milky-white emulsion when the mixture is thor- 

 oughly agitated. If naphtha soap is used, double the amount called 

 for by the formula, and emulsify in soft (rain) water. 



Approved: 



James Wilson, 



Secretary of Agriculture. 



Washington, D. C, October 11, 1909. 



[Cir. 114] 



