Ammonio-ferric

(Ferri et Ammonii sulphas), U. S. P., is strongly styptic, and is useful in leukorrhea. Dose gr. v-x (0.32- 0.65). A., Pota io-ferric, is similar to the A., ammonio-ferric. A., Soda, double sulphate of sodium and aluminium, is too soluble for ordinary uses. A. Whey, a preparation obtained by boiling 3 ij of alum in a pint of milk, and straining. It is used as an astringent and internal hemostatic, in winegla ful doses. 47