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.