402. SELTZER WATER.

Take of water any quantity. Impregnate it with about ten times its volume of carbonic acid gas, by means of a forcing pump.

403. LIQUID MAGNESIA.

Take of water 1 gallon,
carbonate of magnesia, 3 drachms, and
impregnate it as above.

404. POTASS WATER.

Take one ounce of subcarbonate of potass, and impregnate as above.

405. SODA WATER.

Take 2 ounces of subcarbonate of soda, and impregnate as above.

406. PORTABLE LEMONADE.

Take of tartaric acid, ½ oz.
loaf sugar, 3 oz.
essence of lemon, ½ drachm.