This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
The strong acid may, with advantage, be lightly pencilled over torpid suppurating buboes, to destroy the integument and stimulate to healthy discharge; should a sinus be formed, the upper wall should be touched in the same manner (Lancet, ii., 1867, p. 796).
Good results have been obtained after surgical evacuation of a suppurating bubo, from injecting a weak solution of copper sulphate into the cavity. M. Danielli found this quickly diminish the secretion, which after simple opening is very apt to re-form (Bulletin de Therapeu-tique, 1868). M. Diday recommended a strength of 3 gr. to the ounce. The solid sulphate is a good application to syphilitic cracks, patches, and ulceration about the mouth and tongue.
 
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