Characters. - A soft, moist, pasty mass, of a reddish-brown colour.

Solubility. - Dissolves readily in diluted hydrochloric acid. Reactions. - The solution gives the reaction of a ferric salt only.

Dose. - 1/4 to 1/2 ounce.

Use. - As an antidote for arsenic, it should be given in doses of a tablespoonful every five or ten minutes. It may be used in anaemia and amenorrhoea.

Preparations.

U.S.P. Emplastrum Ferri (hydrated oxide dried, with Canada turpentine, Burgundy pitch, and lead plaster).

U.S.P. Trochisci Ferri (troches of iron). Iron lozenges, 5 grs. in each lozenge.