Large quantities of this wholesome and refreshing preparation are manufactured and consumed every summer; it is sold in bottles, and also as a beverage, made by dissolving a large tea-spoonful in a tumbler two-thirds filled with water. Ground white sugar, half a pound; tartaric acid, carbonate of soda, of each a quarter of a pound; essence of lemon, forty drops. All the powders should be well dried; add the essence to the sugar, then the other powders; stir all together, and mix by passing twice through a hair sieve. Must be kept in tightly-corked bottles, into which a damp spoon must not be inserted. All the materials may be obtained at a wholesale druggist's. The sugar must be ground, as, if merely powdered, the coarser parts remain undissolved.