The yolk of eggs beaten up, lump sugar (quantum sufficit), Rhenish wine or not, citric acid, powdered, or tartaric acid (small quantity-exact quantity 60on found); one or two drops of essence of lemon on a lump of sugar, to make it mix readily with the water; one quart of water. This is really an excellent, agreeable, and, without the wine, an inexpensive beverage.