Magnesium Citrate

Magnesium carbonate.............. 10 ounces

Citric acid......... 20 ounces

Sugar............. 21 ounces

Oil of lemon........         0.5 drachm

Water enough to make............ 240 ounces

Introduce the magnesium carbonate into a wide-mouthed 2-gallon bottle, drop the oil of lemon on it, stir with a wooden stick: then add the citric acid, the sugar, and water enough to come up to a mark on the bottle indicating 240 ounces. For this purpose use cold water, adding about half of the quantity first, and the remainder when the substances are mostly dissolved. By allowing the solution to stand for a half to a whole day, it will filter better and more quickly than when hot water is used.

MAGNESIUM ORGEAT POWDER

See Salts, Effervescent.

MAGNESIUM FLASH-LIGHT POWDERS

See Photography.