Cover 3 lemons and 1 grapefruit with water and boil until soft.
Cut fruit in half and remove seeds and skin.
Grind rind or cut in thin strips until you have 3/4 cup pulp and rindand sufficient water In which fruit was boiled in -- should equal 4 cups.
Add 1 package Fruit Jell Pectin to this and bring to a rolling boil.
Then add 6 cups sugar, stirring until dissolved.
Boil 2 minutes. Skim off scum. Put into sterilized jars.
*Marmalade is a fruit preserve, made from orange or other citrus fruit, sugar, and water. Some recipes include some amount of peel and zest, which imparts a sharp, bitter taste from the bitter citrus oil.
NOTES ON LEMON MARMALADE: This takes less than 2 hours to make. It's incredibly tart so don't skimp on the sugar.