PROJECTS 619 



which serve to keep the jars off the bottom of the boiler and furnish 

 handles for removing the jars from the boiling water at the end of 

 the process of sterilization. 



Put cold or tepid water into the boiler to the depth of two or 

 three inches and place the boiler over thfe flame. Place the jars in 

 the boiler, and add enough cold or tepid water to cover the jars to 

 a depth of several inches, but not enough to allow the boiling water 

 to reach the covers of the jars. 



Cover the boiler and allow the jars to remain in it for 22 minutes 

 after the water begins to boil. 



At the end of 22 minutes of sterilization, remove the boiler from 

 over the fire, take the jars out immediately, and tighten the covers. 

 The clamp-type or the Ball-Mason jars may be inverted a few 

 minutes to test for leakage. The vacuum seal jars should not be 

 inverted. Let them stand until they are cool. If, when the jars 

 are cool, you can lift them from the table by holding to the covers 

 alone, they are probably free of leakage. 



For information as to cold-packing other vegetables and as to 

 varying the time of sterilization for altitudes higher than 1000 

 feet above sea-level, write to the United States Department of 

 Agriculture for a copy of Farmers' Bulletin No. 839, " Home Canning 

 by the One-period Cold-pack Method." 



For canning by the cold-pack method in high altitudes, the 

 pressure cooker is very desirable. The increased temperature 

 makes sterilization more certain and hastens the process. 



PROJECT XLII. How to Cold-pack Certain Berries with Sugar, 

 page 440 



The following particular instructions apply to the cold-packing 

 of blackberries, blueberries, currants, dewberries, black raspberries, 

 and huckleberries, but not strawberries, red raspberries, or goose- 

 berries. For cold-packing other kinds of fruits, see Farmers' 

 Bulletin No. 839, United States Department of Agriculture. 



Sterilize jars, covers, rubbers, and all utensils, as directed for 

 cold-packing tomatoes (Project XLI). 



