Orange Marmalade

Six oranges, 3 lemons. Pare the oranges and lemons and cut the rinds into shreds. Take off and throw away the thick, white inner skin. To 1 pt. of sliced orange and lemon take 1 1/2 pts. water. Cook 1/2 hour and let stand over night. To 1 pt. of mixture add 1 1/2 lbs. of sugar. Boil 40 minutes.