Hard Soap. A combination of Olive Oil with Soda. Composed of Oleate and Margarate of Soda.

Sapo Mollis. Soft Soap. A combination of Olive Oil and Potash. Composed of Oleate and Margarate of Potash.

Med. Prop. and Action. Soap, in its operation, is Tory similar to the alkalies generally, but milder, It is rarely administered singly, as an internal remedy, as the liberation of the fatty acids entering into its composition renders it objectionable, but it is often advantageously combined with Rhubarb, Aloes, Extract of Jalap, and other purgatives, the operation of which it renders more speedy and mild. It is also a common constituent of suppositories (Pilula Opii), rendering them more soluble and efficient. Externally, it enters into a variety of liniments, embrocations, &c., and proves useful in some cutaneous diseases. The Linimentum Saponis is a particularly useful formula.

Offic. Prep. of Sapo Durus. 1. Emplastrum Saponis (Hard Soap in powder or. vj.; Litharge Plaster lbs. ij. 1/4; Powdered Resin or. j. To the Litharge Plaster melted by a gentle heat, add the Soap and Resin first liquefied; then constantly stirring, evaporate to a proper consistence).

2. Linimentum Opii

(See Opium).

3. Linimentum Saponis (Opodeldoc) (Hard Soap Or

iiss.; Camphor or. j. 1/4; English Oil of Rosemary fl. drs. iij.; Rectified Spirit fl. or. xviij.; Distilled Water fl. or. ij. Mix the Water with the Spirit, and add the Oil of Rosemary, the Soap, and the Camphor. Digest at a temperature not exceeding 70°, with occasional agitation until all are dissolved).

Hard Soap also enters into the composition of many of the Officinal Pill masses.

Incompatible*. Acids; Acidulous Salts; Alum; Nitrate of Silver; Calomel; Corrosive Sublimate; the Sulphates; and all astringent vegetable solutions.

2421. Therapeutic Uses

In Poisoning by the strong Mineral Acids, Soap is an efficacious antidote; and its being generally at hand renders it doubly valuable. It cannot be used too soon, and must be given in strong solution, of which a tea-cupful should be drunk at short intervals. Burns with the strong Acids, or with Phosphorus, should be bathed with a solution of Soap.

2422. Dyspepsia attended with Acidity of the Primes Via is often benefited by the internal use of Soap, in combination with Rhubarb and an essential oil. In Pyrosis, Dr. Mason Good speaks highly of the value of Soap, either alone or with Opium.

2423. Habitual Constipation, when the faeces have become hardened and impacted, is often relieved, if not altogether removed, by an enema of a strong solution of Soap.

2424. In Calculous Diseases, in the Uric or Lithic Acid Diathesis, the internal use of Soap, either alone or with Lime-water, often affords great temporary relief, correcting any abnormal acidity.

2425. In Obesity, Soap, In Doses Of Gr

x. - xx. daily, was strongly advised by Dr. Flemyng.* He stated that it is a valuable adjunct to active exercise and low diet, and that it was found particularly useful in obesity connected with Gout.

2426. In Tinea Capitis, and many Cutaneous Diseases, the daily application of Soft Soap and warm water contributes materially to a speedy cure. Dr. Neligan, however, objects to it in diseases of the scalp.

2427. In Syphilitic Eruptions, Dr

Fricke observes that Soap-baths (in the proportion of a pound of yellow Soap to each bath) always constituted the first step in the treatment in every form of eruption. In all instances they excited, in the commencement at least, a favourable influence; and they were found sufficient, in many cases, to effect a cure without any other remedy. Some forms required from six to eight, and others from twelve to sixteen, baths, to effect a cure. (Dr. Graves.)

2428. To Abscesses, to hasten the suppurative process, a popular sailor's application is a plaster, composed of equal parts of common yellow Soap and brown Sugar, beaten together into a paste, spread on a bit of linen, and placed over the part. I have used it myself, and seen others use it in a great number of cases; it greatly eases the pain, and appears to hasten the suppurative process more than any other application. Its simplicity is a great recommendation to its use.

2429. In Sprains, Bruises, Chronic Rheumatism, &c., the Soap Liniment (ut supra), diligently rubbed in for fifteen or twenty minutes, two or three times a day, affords great relief. A portion of T. Opii (fl. drm. j. ad fl. oz. j.) may be advantageously added.