Wash, blanch, peel and pit nectarines; wash the oranges. Remove the peel from
1 1/2 of the oranges and discard it. Put the nectarines and the peeled and unpeeled
oranges through a meat grinder. There should be about 4 1/2 cups. Place the fruit
in a preserving kettle; add 4 1/2 cups of sugar and bring slowly to a boil. Boil
rapidly, uncovered, for about 30 minutes, stirring frequently. Skim off foam with
a metal spoon. Ladle into hot, sterilized jars and seal immediately.
To seal: Fill to within 1/2-inch head room, being sure to first wipe the rim
and threads of the jars with a hot damp cloth to remove all particles of food, seeds
or spices. While contents are hot, cover with a 1/8-inch layer of paraffin. When
paraffin has set, add another layer of melted paraffin, tilting and rotating the
jar to seal completely.