This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
The hairs of the seed of Gossypium herbaceum Linne, and of other species of Gos-sypium (nat. ord. Malvaceae), freed from adhering impurities, and deprived of fatty matter.
Tropical Asia and Africa; cultivated in tropical and subtropical countries.
White, soft, fine filaments, appearing under the microscope as hollow, flattened and twisted bands, spirally striate, and slightly thickened at the edges; inodorous and tasteless; insoluble in ordinary solvents, but soluble in Copper Ammonium Sulphate solution.
Synonyms. - Gun Cotton. Soluble Gun Cotton. Calloxylin. Purified Cotton, 100; is immersed in a mixture of Sulphuric, 2200; and Nitric Acids, 1400; washed with a large quantity of Water, drained and dried.
4. Collodium Stypticum. - See Tannic Acid, p. 593.
The uses of cotton are well known. Cotton, lint and gauze are frequently medicated, e.g., Sal Alembroth, 2 per cent.; Boric Acid, 5 or 10 per cent.; Salicylic Acid, 5 per cent.; Carbolic Acid, 5 per cent.; Iodoform, 5, 10 and 50 per cent.
Pyroxylin is only used to make collodion. Collodion, when painted on the skin, rapidly dries from evaporation of the ether, and covers the skin with a thin protective film. Flexible collodion has the same properties, but it does not crack, as collodion often does. These preparations are protective to small wounds, and are used after slight operations. If the end of the urethra or prepuce is closed at night with collodion, nocturnal incontinence may sometimes be cured.