Mayer recommends the rubbing in of rheumasan, a salve-soap containing 10 per cent. of free salicylic acid. This should be massaged in for at least five minutes and then glacé gloves should be worn at night. The patient should be cautioned to discontinue the use of the drug for a few days on the first appearance of redness. A. W. PSORIASIS VULGARIS OF THE SKIN AND MUCOUS MEMBRANE, ITS PATHOLOGICAL POSITION AND ÆTIOLOGY. P. THIMM. (_Monatsh. f. prakt. Derm._, July 1st, 1904, p. 1.) Dr. Thimm gives the history of a patient, a man aged 36 years, who had been under his care for five years. He had an obstinate recurring extensive psoriasis eruption of the skin of the trunk and limbs, typical psoriasis lesions of the upper and lower lips, extending on to the mucous membranes of the mouth and nasal cavities. In addition, the mucous membrane of the mouth showed, while he was under observation, various circumscribed diseased patches, setting in synchronously with the eruption on the skin, which also disappeared at the same time after general treatment with arsenic. Schimmer’s typical leucoplakia was also present, the patient being an immoderate smoker, and this continued in spite of all treatment. There were no signs of syphilis. Microscopical examination of two mucous membrane lesions showed great œdema, enlarged intercellular spaces, thickening of the epidermal covering _in toto_, but a thinning of the rete over the elongated, high-reaching papillæ. Small-celled infiltration of the upper layers of the corium, extending even up into the epithelium, was also present.