19G SPRAYING MATERIALS 



who consider it the only really satisfactory form. The great 

 objection to it is that only a small quantity can be prepared at 

 a time, usually a single cask, and that, too, only as it is wanted 

 for use, being applied hot, as a rule. 



The formulas used vary greatly in both ingredients and run 

 all the way from 



15 pounds lime, 1.5 pounds sulfur, 50 gallons of water 

 to 22 pounds lime, 20 pounds sulfur, 50 gallons of water. 



The process of making is as follows : Put the lime and sulfur 

 into a large kettle with about 20 gallons of water and boil for one 

 hour. Then add enough water to make 50 gallons, strain into the 

 spray cask and apply at once. Authorities differ as to the objec- 

 tion of allowing this mixture to cool ; for example, to stand over 

 night. Frequently it is very convenient to prepare the night be- 

 fore what is to be put on the first thing in the morning, and enough 

 success attends this plan so that Ave need not hesitate to do it. 



4. The "self-hoilecV' lime-sulfur is that in which the heat 

 of the slacking lime is relied upon to cook the mixture. It is a 

 very mild form, being little more than a mechanical mixture of 

 sulfur and slacked lime, and is useful only as a summer fungicide. 

 But for that purpose, particularly for use against the brown rot 

 of stone fruits, it is very efficient. 



The usual formula is as follows : 



8 pounds sulfur, 8 pounds rock lime, 50 gallons water. 



An old oil cask is a good receptacle in which to prepare it. 

 The lime is placed in the bottom of the cask, and it is imperative 

 that it be good, hard rock lime and not air-slacked lime, since 

 the heat for cooking is to come entirely from the lime. On top 

 of the lime place the sulfur. Then add hot water slowly until 

 the lime is slacked, stirring carefully, as needed, to prevent the 

 "burning" of the lime. After slacking is complete allow the 

 mixture to stand and cook for from ten to fifteen minutes, depend- 

 ing on the amount of heat generated by the lime, keeping the 

 barrel covered with an old burlap to keep in the heat. Then 



