Peel some very small white onions, and lay them for three days in salt and water, changing the water every day. Then wipe them, and put them into a porcelain kettle with equal quantities of milk and water, sufficient to cover them well. Simmer them over a slow fire, but when just ready to boil take them off, and drain and dry them, and put them into wide-mouthed glass bottles; interspersing them with blades of mace. Boil a sufficient quantity of the best cider vinegar to cover them and fill up the bottles, adding to it a little salt; and when it is cold, pour it into the bottles of onions. At the top of each bottle put a spoonful of sweet oil. Set them away closely corked.