_Leprosy._ Chaulmúgra (94), Gurgun Balsam (161*), Hydrocotyle (169*), or Mudar (242); with these may be advantageously conjoined a prolonged course of Fish Liver Oil (142), or the latter may be tried alone. _For the ulcerations_, poultices of Hydrocotyle (169) or Ním Leaves (261) may be applied with advantage. Opium (283) is often necessary _to relieve pain and procure sleep. Whatever other treatment may be adopted, diligent oily frictions over the whole body should form an essential part of it_ (161-338). Carbolic Acid promises to prove a most valuable agent in this disease. The treatment of Leprosy by Carbolic Acid Vapour Baths, introduced by Surgeon-General W. Johnston, M.D. (_Times_, June 3, 1882), promises good results, and seems well worthy of further trials. All that is required is an ordinary vapour bath apparatus (397), in which the patient sits, and _outside a chattie_ or vessel of sufficient size to contain about a quart of liquid, and made with a lengthened curved spout, to fit accurately on an elastic tube of sufficient length as to pass within the vapour-proof envelope. The calibre of this elastic tube should be such as would admit of a continuous and abundant supply of the vapour as it comes from the vessel, resting on a spirit-lamp having a flame sufficient to keep the fluid in the vessel boiling briskly. Prior to the use of this bath, sponging the body with tepid water, holding a piece of washing soda in solution, seems to aid the absorption of the vapour. The Carbolic Acid should be Calvert's Disinfecting Fluid, of which a mixture of three or four parts to six or seven of water may be employed. In this vapour bath the patient should remain from 30 to 60 minutes (care being taken that a continuous supply of vapour is kept up from outside), and it may be repeated every second or third day according to circumstances. Dr. Johnston informs me that he has never seen any ill effects result from the use of this carbolised aqueous vapour, even in cases presenting extensive ulcerated surfaces. Some care is requisite in arranging the fold or frill round the aperture through which the head protrudes. "Were the patient to breathe a little of it," Dr. J. remarks, "little injury would result, possibly good, but still, for obvious reasons, he should not be allowed to breathe too much." Dr. Aitchison directs leprous ulcerations to be treated with a solution of Carbolic Acid (one to seven or ten of Sweet Oil, according to circumstances), and that at the same time the whole body should be rubbed with a weaker solution (1 to 20). This treatment, he remarks, at once removes the horrid odour usually attendant upon these cases, and the patients will readily adopt it, when they distinctly refuse to wash or clean themselves. With a change in diet, under this treatment, these cases, he adds, improve remarkably.