Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: algae. During decomposition of these latter substances it is evolved as H2S. As H2S it is found as a constituent of some waters. Properties.—It is a yellow, brittle solid, odorless and tasteless; insoluble in water; soluble in benzene, benzole, chloroform, ether, carbon disulphid, oil of turpentine, and the fatty oils; and melts at 115 C. (239 F.). When melted sulphur is poured into water it forms a plastic mass, one of the allotropic forms of sulphur, which soon changes into the regular form again. Sulphur is found in commerce in a variety of forms: Brimstone, sublimed sulphur, washed sulphur, and precipitated sulphur. The crude sulphur when heated is vaporized, and when passed into large cooled chambers condenses, forming the sublimed or flowers of sulphur. After a time, the condensing chambers becoming warm, the sulphur liquefies and is run into molds, forming brimstone or roll sulphur. (See page no.) Washed sulphur, Sulphur lotum, is sublimed sulphur that has been treated with dilute ammonia-water to remove any sulphurous acid, sulphuric acid, and arsenic that may be present. This is the kind that should be used when intended for internal use. Precipitated sulphur (milk of sulphur, lac sulphur) is sulphur, lime, and water boiled together. To the deep orange solution which results HCl is added, and the precipitated sulphur is washed with water and dried. Itis of a lighter color than ordinary sulphur, and when first precipitated is milk white; hence its name. Medicinal Properties and Uses. — It is alterative, laxative, diaphoretic, resolvent, and antiparasitic. It passes out of the system largely unchanged; the small part that had been combined, as sulphids or H2S. It enters into the preparation of sulphur ointment, 15 per cent. of washed sulphur rubbed up with...