To every four pounds of sugar put a quart of water and the whites of two eggs; if you put in the egg after it gets hot, it will cook before it has the desired effect; when it comes to a boil, and the scum rises, pour in a little cold water; let it boil up; take it off to settle, and skim it well; let it boil up, and skim it three times, when it will be fit to preserve with. You should always clarify white Havana sugar.
Domestic Cookery, Useful Receipts, and Hints to Young Housekeepers.