A hand-book of materia medica and therapeutics : with twenty-nine illustrations : being a portion of An analytical compendium of the various branches of medicine / by John Neill and Francis Gurney Smith.
- John Neill
- Date:
- 1852
Licence: Public Domain Mark
Credit: A hand-book of materia medica and therapeutics : with twenty-nine illustrations : being a portion of An analytical compendium of the various branches of medicine / by John Neill and Francis Gurney Smith. Source: Wellcome Collection.
Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)
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![Prepared by burning mercury in chlorine gas; by action of hy- drochloric acid on the red oxide; or preferably, by subliming to- gether the bisulphatc with common salt, thus :— . , . „ ( Mercury : rp Bichloride of mercury, 1 eq. bipersulphate of I 2 Q H C] mercury ( 2 Sul% acid ->$<f 2 eq. chloride of so- (2 Chlorine i^^ dium \ 2 Sodium ^ 2 eq. sulphate of soda. Pi-oj).—Crystalline; soluble in water, alcohol, and ether. The alkalies and their carbonates throw down from it the red oxide; ammonia in excess throws down from its solution the white precipi- tate, which is considered to be an amo-chloride of mercury (Kane). This amo-chloride, or chloramide, as it is often called, is considered to be a double salt, composed of the biqmide of mercury and some undecomposed bichloride.—Albumen is the best antidote for it. There are two iodides, two bromides, one cyanide, and two sul- phides of mercury. The bisulphide occurs native, under the name of cinnabar ; its powder is called vermilion. Ethiop's mineral is made by triturating mercury and sulphur together, until the glo- bules disappear; it is considered to be a mixture of sulphur and the bisulphide. The most important salts are formed with nitric and sulphuric acids, each of which unites with the protoxide and the peroxide. The turpeih mineral is the subsulphate, formed by throwing the sulphate into water. The best tests for mercury are :—iodide of potassium, which gives with a protosalt the green iodide, and with a persalt, the beautiful red biniodide;—protochloride of tin gives a black precipitate if heated with a protosalt;—a drop of a mercurial solution put upon a polished surface of gold, and touched with the point of a pen- knife, instantly causes a white stain, from the amalgam which is formed by the galvanic agency. PART III. ORGANIC CHEMISTRY. GENERAL OBSERVATIONS. Organic substances, whether derived from the vegetable or animal kingdom, are chiefly remarkable for the complexity of their composition, and for the limited number of their elements. Only four elements are considered essential to the composition' of organic](https://iiif.wellcomecollection.org/image/b21143559_0081.jp2/full/800%2C/0/default.jpg)
