This section is from the book "A Treatise On The Materia Medica And Therapeutics Of The Skin", by Henry G. Piffard. Also available from Amazon: A Treatise On The Materia Medica And Therapeutics Of The Skin.
D. Malignant growths. Chancroids (H.G.P.)
* Des eruptions cutanees provoquees par l'ingestion de 1'hydrate de chloral Paris, 1879.
A solution of this salt has been recently introduced as a caustic agent for the destruction of malignant growths. It is prepared, according to Messrs. Bullock & Crenshaw, who manufacture it, by dissolving hydrated sesquioxide of chromium in hydrochloric acid, and evaporating the solution to a syrupy consistence. Its action is exceedingly superficial and not very painful. The crust which forms after its application to a diseased surface remains attached for a long time, in one instance five weeks, under my own observation. Unless superficial action only is desired, it will be necessary to detach this crust and reapply the solution from time to time. My own experience with it is yet too limited to enable me to speak with confidence concerning its sphere of usefulness. When deeper action was required, I have mixed it with chloride of zinc.
 
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