½ bottle Certo
To prepare juice, crush thoroughly about 4 pounds fully ripe fruit. Do not peel or pit. Add 1 cup water, bring to a boil, cover, and simmer 10 minutes. Place in jelly cloth or bag; squeeze out juice. (Sour, cling-stone plums make best jelly. If sweet plums or free-stone prunes are used, substitute ½ cup strained lemon juice for ½ cup of the plum juice specified.) Measure sugar and juice into large saucepan and mix. Bring to a boil over hottest fire and at once add Certo, stirring constantly. Then bring to a full rolling boil and boil hard ½ minute. Remove from fire, skim, pour quickly. Paraffin at once. Makes about 11 glasses (6 fluid ounces each).
GRAPEFRUIT JELLY
3½ cups (1¾ lbs.) juice
7 cups (3 lbs.) sugar
1 bottle Certo
To prepare juice, grate rind from 4 medium grapefruit, and squeeze out juice. Add juice to grated rind and let stand for 10 minutes. Press juice through small cloth. Measure sugar and juice into large saucepan and mix. Bring to a boil over hottest fire and at once add Certo, stirring constantly. Then bring to a full rolling boil and boil hard ½ minute. Remove from fire, skim, pour quickly. Paraffin at once. Makes about 10 glasses (6 fluid ounces each).
PEACH JELLY
3 cups (1½ lbs.) juice
6½ cups (2¾ lbs.) sugar