MAGNESIUM CITRATE.
| Magnesium carbonate | 10 ounces |
| Citric acid | 20 ounces |
| Sugar | 21 ounces |
| Oil of lemon | 1/2 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.