Essays on the effects of iodine in scrofulous diseases : including an inquiry into the mode of preparing ioduretted baths / translated from the French of M. Lugol, by W.B. O'Shaughnessy ; with an appendix by the translator, containing a summary of cases treated with iodine ...

  • O'Shaughnessy W. B. (William Brooke), 1809-1889.
Date:
1831
Catalogue details

Licence: Public Domain Mark

Credit: Essays on the effects of iodine in scrofulous diseases : including an inquiry into the mode of preparing ioduretted baths / translated from the French of M. Lugol, by W.B. O'Shaughnessy ; with an appendix by the translator, containing a summary of cases treated with iodine ... Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    4.—lodurets of Mercury, Iodine forms two combinations with metallic mercury : a proto and deuto-ioduret; the first of a fine canary yellow, the second of a beautiful carmine colour. The first of these compounds is prepared by adding a solution of the hydriodate of potash to a solution of a ^;ro/o salt of mercury. The second is made by adding the hydrio- date to ^per salt of the same metal. In the preparation of the proto-ioduret by double decom- position, great care is necessary that the salt of mercury should contain no per-oxide, otherwise a deuto-ioduret would be formed, a compound analogous in its properties to the bi- chloride or corrosive sublimate. By observing the following directions, however, the proto-ioduret will be obtained per- fectly pure. Dissolve, without applying heat, a sufficient quantity of pure mercury in one part of nitric acid diluted with three parts of distilled water, and add mercury until no more be dissolved. A proto-nitrate of mercury is thus formed which frequently shoots into a mass of white crystals. Any excess of metallic mercury is to be separated by inclining the vessel and allowing it to run off, the solution containing the crystals is then to be diluted with distilled water until they are perfectly dissolved; a pure proto-nitrate of mercury is thus obtained, the formation of the per-nitrate being only occasioned by the application of heat and the use of too concentrated nitric acid. Hydriodate of potash is to be added to this solution as long as any precipitate occurs. Filtration is then to be performed, the matter remaining on the filter to be well washed with distilled water, and dried in a water bath. As