Take fine large ripe oranges, with thin deep-coloured skins. Weigh them, and allow to each pound of oranges a pound of loaf-sugar. Pare off the yellow outside of the rind from half the oranges, as thin as possible; and putting it into a pan with plenty of cold water, cover it closely (placing a double cloth beneath the tin cover) to keep in the steam, and boil it slowly till it is so soft that the head of a pin will pierce it. In the mean time grate the rind from the remaining oranges, and put it aside; quarter the oranges, and take out all the pulp and the juice; removing the seeds and core. Put the sugar into a preserving kettle, with a half pint of clear water to each pound, and mix it with some beaten white of egg, allowing one white of egg, to every two pounds of sugar. When the sugar is all dissolved, put it on the fire, and boil and skim it till it is quite clear and thick. Next take the boiled parings, and pound them to a paste in a mortar; put this paste into the sugar, and boil and stir it ten minutes. Then put it in the pulp and juice of the oranges, and the grated rind, (which will much improve the colour,) and boil all together for about half an hour, till it is a transparent mass. When cold, put it up in glass jars, laying brandy paper on the top.
Lemon marmalade may be made in a similar manner, but you must allow a pound and a half of sugar to each pound of lemons.