68 Report of State Board of Horticulture. 



Slake the lime, mix the sulphur into a thin paste with a 

 little water, add it to the lime, add sufficient water to make 

 60 gallons, bring to a boil and boil vigorously for 30 to 45 

 minutes. The sediment is then allowed to settle, after which 

 the clear dark amber-colored liquid is drawn off and may be 

 stored in casks for future use. 



Every grower who expects to prepare his own spray by the 

 stock Solution should provide himself with a Beaume's Acid 

 Scale Hydrometer. Such an Instrument, which should not 

 cost over $1.00, furnishes a very simple and convenient method 

 of testing the strength of the Solution. A "stock" Solution 

 'prepared as above described should test approximately 30 

 degrees upon such a scale. 



If the grower be provided with a hydrometer, it is not at all 

 necessary to obtain stock Solutions of uniform strength. The 

 following table gives the proper dilution to be used with 

 stock Solutions of various degrees of density, both for win- 

 ter and summer spraying: 



KEROSENE EMULSION. 



Kerosene oil, or coal oil, is a powerful insecticide. The 

 undiluted oil is, however. Kable to seriously injure plants to 

 which it is applied. This difhculty is overcome by using 

 one of the special spray pumps which have been devised for 

 the.purpose of mixing the oil with water in any dösired Pro- 

 portion ; or by forming an emulsion with some substance that 

 may be readily diluted with water. Soap is most commonly 

 used for this purpose, as f ollows : 



Kerosene oil 2 gallons 



Hard soap (preferably whale-oü) V2 pound 



Water 1 gallon 



Dissolve the soap in the water by boiling. Add the suds, 

 boiling hot, to the oil. Churn the mixture violently with a 

 spray pump until it becomes a thick, creamy mass. If per- 



