Acne rosacea is characterized by hyperaemia, dilated vessels, papules, pustules, the absence of ulceration, and a different history. #State the prognosis of lupus vulgaris.# Lupus vulgaris is always a chronic disease, often exceedingly rebellious to treatment, and one that calls for a guarded opinion. Relapses are not uncommon. [Illustration: Fig. 46. Galvano-cautery Needle, Knife and Spiral Points. (_As devised by Besnier._)] The general health usually remains good, but in some instances death by tuberculosis of the lungs has been noted. #Is external or internal treatment called for in lupus vulgaris?# Always external, and not infrequently constitutional also. #What is the constitutional treatment?# The general health must be cared for; good, nutritious food, fresh air and out-door exercise, together with, in many cases, the administration of such remedies as cod-liver oil, potassium iodide, iron and quinine, are of therapeutic importance. Tuberculin may be tried in severe and obstinate cases, but its use is not without danger. #State the object of local treatment.# The destruction or removal of the diseased tissue. #May milder methods of treatment sometimes prove beneficial and even curative?# Exceptionally, mercurial plaster, corrosive-sublimate lotion and ointment (gr. j to [Oz]j), a plaster containing five to fifteen per cent. of salicylic acid and creasote, repeated paintings with carbolic acid, and the constant application of lead plaster containing twenty per cent. of ichthyol, are valuable. [Illustration: Fig. 47. Double Curette.] Of the milder methods, those most in vogue to-day are the _Finsen light_ and _x-ray_. Either proves extremely valuable in some cases, but the Finsen method is the favorite method. #What methods are commonly employed for the rapid removal or destruction of lupus tissue?# Cauterization, scarification, erasion and excision are variously practised; the particular method depending, in great measure, upon the extent of the disease, the part involved, and other circumstances. #Name the several caustics, and state how they are employed.# _Pyrogallic acid_, used as an ointment:-- [Rx] Ac. pyrogallici, ..................... [dram]ij Emplast. plumbi, ..................... [dram]j Cerat. resinsae, ...................... [dram]v. M. It is applied for one or two weeks. Every several days the parts are poulticed, the slough thus removed, and the ointment reapplied, and so on until the diseased tissue has been destroyed. It is useful in those cases in which a mild and comparatively painless caustic is advisable. In most cases several repetitions of this plan are necessary. _Arsenious acid_, employed as an ointment-- [Rx] Ac. arseniosi, ...................... gr. xx Hydrarg. sulphid. rub., ............. gr. lx Ungt. aquae rosae, .................... [Oz]i.--M.