4 c. (approximately) grapes
Jelly bag
3/4 to 1 c. sugar (per cup of juice)

Wash and stem grapes. Add 1/4 cup water for each 4 cups grapes. Heat to a boil and simmer 10 to 15 minutes. Strain through jelly bag. Let stand overnight in cool place. Dip juice out and strain again. Mix 1 cup sugar for each cup of grape juice. Heat, stirring until sugar is dissolved. Cook until syrup sheets off spoon. Pour into hot jelly glasses.