150

POWDERS.

Sulphate of Potash, three ounces;Dry the salts separately with a gentle heat,and pulverize each, then triturate them welltogether, and prescrve the mixture in well-closed vessels.

Pulvis scammonii compositus.Take of Scammony, and

Bitartrate of Potash, of each, equalparts.Triturate them together to a very finepowder.

Pulvis tragacanth ae compositus.Take of Tragacanth, bruised,

Gum-arabic, hruised, andStarch, of each one ounce and a half;Pure sugar, three ounces ;Reduce the starch and sugar together topowdcr, then add the tragacanth and gum-arahic, and pulverize the mixture thoroughly.