Further observations on the internal use of the hydro-cyanic (prussic) acid, in pulmonary complaints; chronic catarrhs; spasmodic coughs; asthma; hooping-cough; and some other diseases : with full directions for the preparation and administration of that medicine / by A.B. Granville.

  • Augustus Granville
Date:
1819
Catalogue details

Licence: Public Domain Mark

Credit: Further observations on the internal use of the hydro-cyanic (prussic) acid, in pulmonary complaints; chronic catarrhs; spasmodic coughs; asthma; hooping-cough; and some other diseases : with full directions for the preparation and administration of that medicine / by A.B. Granville. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    [8] carbonate of lime, drawing off, afterwards, ■{ only of the whole by a second distillation. By this method the acid is obtained at an uni- form degree of concentration. Vauquelirts Process. Into a solution consisting of two ounces of cyanuret of mercury and sixteen ounces of water, pass as much sulphuretted-hydrogene gas as will serve to decompose the salt, leaving an excess of the gas. Filter the liquor to se- parate the sulphuret of mercury formed, and treat the filtered liquor with an excess of sub- carbonate of lead. Shake the bottle until the excess of sulphuretted-hydrogene be absorbed. Filter once more, and the remaining liquor will be dilated hydro-cyanic acid, of a proper strength for medical purposes.* The prussic or hydro-cyanic acid is not found * See at the end of this paper the Latin formula, taken from the Pharmacopceia of the Faculty of Medicine of Paris, 1818.t t Mr, Garden, chemist, of Oxford-street, is the only per- son, to my knowledge, who has prepared the medicinal prnssk acid, according to both the above methods; each of which is perfectly good for the purpose of practice : and I have sa- tisfied myself, by occular demonstration, that every precaution was taken to ensure the accurate result of the operations.