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.
Sulphurous acid solution is a cleanly and efficient mode of treating these maladies, as first pointed out by Sir William Jen-ner (Medical Times, ii., 1853, p. 181). It may be painted on occasionally in full strength, or used in lotion or compress, 1 part to 2 or 4 of water and glycerin - the great point is to secure its thorough contact with the diseased surface.
 
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