ment, it is possible to produce a more uniform solution than the 

 home-made product. However, by carefully following direc- 

 tions one may prepare a very satisfactory spray, which can be 

 made during spare time and stored away for future use. The 

 home-made concentrate has the following ingredients : 



Stone lime 40 pounds 



Sulphur 80 pounds 



Water 50 gallons 



The lime used in making this concentrate should be the 

 purest obtainable and as free as possible from magnesium. The 

 sulphur should also be pure and finely ground. The ordinary 

 ground brimstone is the cheapest form but is not as satisfac- 

 tory as either the flour or flowers of sulphur. The solution may 

 be cooked with steam in barrels or in a kettle over fire. In 

 slaking, hot water should be used, if possible. Water should be 

 added to prevent burning, but not in such quantities as to check 

 the slaking. After the lime is thoroughly slaked the sulphur 

 should be sifted into the paste and mixed with it. 



The solution should be diluted to 50 gallons and this amount 

 kept constant during the operation. This may be controlled 

 easily by notching a stick at the level of the solution when the 

 water is first added. If steam is used for cooking, water need 

 not be supplied, but over a fire one must watch the amount of 

 liquid closely. The mixture must be stirred constantly to pre- 

 vent caking on the sides and bottom of the kettle. The boiling 

 should continue steadily until the sulphur is all dissolved. This 

 usually requires from 45 minutes to 1 hour, according to the 

 amount of heat used. 



When the boiling is completed the concentrate should be 

 strained and stored for future use in air-tight barrels. It is 

 frequently convenient to cover the surface with oils, such as 

 the miscible oils, since they prevent drying, will not injure the 

 trees, and will not ignite at the temperature of boiling water. 



Before being used as a spray, the concentrate should be 

 diluted. In order to dilute the mixture properly one should use 

 a Beaume hydrometer, which may be obtained from any lens 

 company, such as the Bausch & Lomb Optical Company, 

 Rochester, N. Y., or the Spencer Lens Company, Buffalo, N. Y. 

 Directions for using these hydrometers usually accompany 

 them. By comparing the Baume reading with Table I the 

 proper amount of dilution may be determined. This table is 



