Soap, Arsen′ical. Syn. Sapo arsenicalis, L. Prep. (Bécœurs.) From carbonate of potash, 12 oz.; white arsenic, white soap, and air-slaked lime, of each 4 oz.; powdered camphor, 34 oz.; made into a paste with water, q. s. Used to preserve the skins of birds, and other small animals.

Soap, Black. Syn. Sapo niger, S. mollis communis, L. A crude soft soap, made of fish oil and potash; but the following mixture is

usually sold for it:—Soft soap, 7 lbs.; train oil, 1 lb.; water, 1 gall.; boil to a proper consistence, adding ivory black or powdered charcoal, q. s., to colour. Used by farriers.

SOAPS (Med′icated). A few only of these deserve notice here:—

Soap, Antimo′′nial. Syn. Sapo antimonialis, Sapo stibiatus, L. Prep. (Hamb. Cod. 1845.) Golden sulphuret of antimony, 2 dr.; solution of caustic potassa, 6 dr. (or q. s.); dissolve and triturate the solution with medicated (Castile) soap (in powder), 112 oz., until the mass assumes a pilular consistence. It should be of a greyish-white colour.

Soap, Chlorina′ted. Syn. Sapo calcis chlorinatæ, L.; Savon antisyphilitique, Fr. Prep. From Castile soap (in powder), 11 oz.; chloride of lime (dry and good), 1 oz.; mix, beat them to a mass with rectified spirit, q. s.; (holding in solution) oil of verbena or of ginger grass, 14 oz.; lastly, form the mass into flat tablets, and wrap these in thin sheet gutta percha. A most excellent detergent and stimulant soap in various affections, admirably adapted for hospital use, and for removing stains from the skin and rendering it white. It is the most powerful known agent against infection from contagious diseases communicable by contact.

Soap, Cod-Liver Oil. Syn. Sapo olei Jecoris (Deschamps). Prep. Cod-liver oil, 2 oz.; caustic soda, 2 dr.; water, 5 dr.; dissolve the soda in the water, and mix it with the oil. An ioduretted soap is made by mixing with the above, 1 dr. of iodide of potassium dissolved in 1 dr. of water.

Soap, Cro′ton. Syn. Sapo crotonis, L. Prep. From croton oil and liquor of potassa, equal parts; triturated together in a warm mortar until they combine. Cathartic.—Dose, 1 to 3 gr.

Soap of Gamboge. Syn. Sapo gambogiæ. (Soubeiran.) Prep. Mix 1 part of gamboge with 2 of soap, dissolve it with a little spirit, and evaporate to a pilular consistence.

Soap, of Gua′iacum. Syn. Sapo guaiaci, Sapo guaiacinus, L. Prep. (Ph. Bor.) Liquor of potassa, 1 oz.; water, 2 oz.; mix in a porcelain capsule, apply heat, and gradually add of resin of guaiacum (in powder), 6 dr., or as much as it will dissolve; next decant or filter, and evaporate to a pilular consistence.—Dose, 10 to 30 gr.; in chronic rheumatism, various skin diseases, &c.