CORNUS FLORIDA.
(Common Dogwood.)
Cortex.
[The dogwood is a common forest tree, abundant in almost every part of the United States. It flowers in the months of May and June. The bark, which is the part used in medicine, yields by analysis tannin, gallic acid, resin, gum resin, bitter extractive, and mucilage. The dogwood is a powerful tonic, and by many practitioners has been used as a substitute for the Peruvian bark. The diseases in which it has been found serviceable are intermitting and remitting fevers, dyspepsia, general debility, &c. It may be given in substance, in doses of ʒj to ʒij—in extract, from 5 to 15 grs. or in infusion or decoction.]
CRETA PRÆPARATA. L.D.
Carbonas Calcis Preparatus. E. Prepared Chalk.
This is common chalk, the coarser particles of which have been removed by the mechanical operation of washing. It consists of carbonate of lime, with various earthy impurities. The Dublin Pharmacopœia directs a chemical process for obtaining a perfectly pure carbonate (Creta Præcipitata), but it appears to be an unnecessary refinement. Med. Uses. It is antacid and absorbent, on which account it is useful in acidities of the primæ viæ, and in diarrhœas, after removing all irritating matters by previous evacuation. (Form. 52.) From its absorbent properties, it is a good external application to ulcers discharging a thin ichorous matter. Dose, grs. x to ℈ij, or more. It is almost unnecessary to state that it must not be combined with acidulous salts; I have however seen a formula for a powder, intended as an astringent, in which chalk and alum entered as ingredients. Officinal Prep. Hydrargyrum cum creta. L. Pulvis cretæ comp. L.E. Pulv. Opiatus. E. (F) Mist. Cretæ. L.E. Trochisci Carbonatis Calcis. E. Confectio Aromatica. L.E. (G)
CROCI STIGMATA. L.E.
(Crocus Sativus.)
Crocus. D. Saffron.