A handbook of local therapeutics / edited by Harrison Allen.

Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: A handbook of local therapeutics / edited by Harrison Allen. Source: Wellcome Collection.

    165/554 (page 153)
    these localities makes it desirable that ointments and powders should con- tain some alkali, or they may do harm by their rapid decomposition. For the same purpose powdered chalk is employed in soothmg, astrin- gent washes as one of the ingredients. (See Zind carbonas, 'Zinci oxidum, Bismuthi subnitras'). The following excellent lotion of Startin, used in Eczema and Acne, is an example of the use of chalk in this connection : B Pulv. zinci carb. pr^cipitat., ; pulv. cretse prseparat^e, ; glycerini f5iij; acid, hydrocyanic, dilut., f^ss ; liquor, calcis, f^iij ; aquae rosae, ad. fgviij. . Prepared chalk enters into the composition of an ointment somewhat similar to the ung, creta conip. of the old London pharmacopceia, which is said by Liveing to be an excellent preparation. ' It is composed as follows: R. Emplast. plumbi, 3vj; cer^ flavae, 3j; olei olivce, fgv. Dissolve together and add, stirring constantly, the following: Cretse. praeparatze 3iij; acid, acetic, dilut., f^j., the dilute acetic acid being first mixed with the chalk. This is employed in Irritable Subacute Eczema. The addition of a drachm of prepared chalk to an ounce of lard makes a convenient chalk ointment, and chalk also enters into the composition of Wilkinson's ointment as an adjuvant (see Picis). Sir Dyce Duckworth has recommended the following chalk ointment'' as an excellent application in Erysipelas : R. Cretae praeparat. seu cretae praecipitat., adipis aa §j. M. The lard should be melted and the chalk slowly added and beaten in-. Lard will take up two and a half times its weight of chalk, but the even proportions make a better ointment. Half a drachm of carbolic acid to the ounce may be added. This ointment is applied, by means of the finger, to the affected parts, which are then covered with plain lint or boric lint. Diseases of the Mouth, Throat, etc.—Carbonate of calcium, forms the basis of many dentifrices on account of its antacid and astringent action on the gums and the raucous membranes of the buccal cavity. Garretson recommends the following formula as a tooth powder: R. Cretae praep- arat£ej pulv. iridis Florentinae, aa 3 ss; pulv. ossis sepise, ^ij; olei limonis, q. s. Prepared chalk enters into the composition of a lozenge used to over- come Acidity of the Mouth and Pharynx. Each lozenge contains four grains of the agent. CALCII CHLORIDUM. Chloride of Calcium.' Chloride of calcium deprived of its water by fusion at the low red heat. It should be preserved in well-stopped bottles. It is in colorless, slightly translucent, hard, and friable masses, very deliquescent, odorless, having a hot, sharp, saline taste, and a neutral or faintly alkaline reaction. It is soluble in one and five-tenths parts of water, and eight parts of alcohol at 15° C (59° F.); very soluble in boiling water, and soluble in one and five-tenths parts of boiling alcohol. (U. S. P.)