Blueberry Jam

Directions

1. 1
   Scald enough glasses and lids for 1 1/2 quarts jam; drain.
2. 2
   In a 6 to 8-quart kettle, stir the blueberries, lemon juice and fruit pectin.
3. 3
   Cook over high heat, stirring constantly, until mixture boils.
4. 4
   Stir in sugar and corn syrup.
5. 5
   Stirring constantly, bring to a full boil; boil 1 minute.
6. 6
   Remove jam from heat.
7. 7
   Skim off foam.
8. 8
   Stir occasionally for 5 minutes, skimming off foam as it rises to the surface.
9. 9
   Fill glasses quickly, leaving 1/2-inch space at top.
10. 10
    Cover immediately with a 1/8-inch thick layer of melted paraffin.
11. 11
    Cool.
12. 12
    Cover.
13. 13
    Makes about 1 1/2 quarts.