Title: Orange~ lemon & grapefruit marmalade
 Categories: Preserves
      Yield: 1 Servings
 
      1    Grapefruit
      3    Oranges
      3    Lemons
           Water
           Sugar
 
  Makes about 18 jelly glasses.
  
  Scrub, cut in halves, remove seeds and slice into very small pieces.
  
  Measure the fruit and juice and add 3 times the amount of water. Soak
  for 12 hours.  Simmer for about 20 minutes. Let stand again for 12
  hours.
  
  For every cup of fruit and juice add 3/4 cup sugar. Cook ingredients
  in small quantities about 4-6 cups at a time until they form a jelly.
  Check by the sheet test with a spoon or use a thermometer 8 degrees F
  above the boiling point of water for your altitude.
  
  Pour into prepared jars, seal and process. Source: Joy of Cooking 1974
  printing Shared by Elizabeth Rodier June 1993 (testing recipe with
  limes)