Cherry jam recipe

4 c Sweet cherries
3 c Warmed sugar
Stone cherries. Crush the fruit. Boil in their juice till tender, about 10 minutes. Add sugar, stir well to dissolve. Boil for another 5 to 7 minutes. Remove from heat & let stand, covered, for 2 to 3 minutes. Stir & skim if necessary. Pour into sterile jars & seal.