4 cups (2 lbs.) juice
8 cups (3½ lbs.) sugar
1 bottle Certo
To prepare juice, cut about 1 pound fully ripe rhubarb in 1-inch pieces
and put through food chopper. Crush thoroughly or grind about 2 quarts
fully ripe strawberries. Combine fruits; place in jelly bag and squeeze
out juice. 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 12 glasses (6
fluid ounces each).