To Balmanno Squire, of London, we are indebted for the use of this agent in Psoriasis. In a five to a ten per cent. ointment, applied once or twice a day, it exerts a remarkable influence on the Psoriasic eruption. The only inconvenience attending its use is the irritation produced by it beyond the limits of its direct application. This sometimes reaches such a degree that prudence induces us to avoid its application to the face or scalp. On other regions it may be used with comparative freedom.

Pyrogallic acid, still more recently introduced, exerts a very energetic influence on Psoriasis. It may be used in ointment of the same strength as the last. It should not, however, be applied to an extensive surface of the body, as there are reasons for believing that it may be absorbed, and exercise an injurious effect.

Besides the drugs above noticed, the following have been recommended:

For Internal Use

Acid. Carbolic., 6; Acid. Nitro-muriatic, 9; Amman. Carbonas, 15; Antimon. Crudum, 20; Arsen. Iod., 28; Asafoetida, 29; Bah. Gurgun., 30; Calotropis, 36; Citrus Limon., 45; Ergota, 52; Galium, 56; Hydrarg. Iod. Rub., 65; Hydrocotyle Asiatica, 68; Iris Versicolor, 71; Juniperus, 73; Limon., 74; Lithii Benzoas, 74; Lithii Bromid., 74; Potassii Carbonas, 92; Potassii Iod., 95; Rhus Tox.t 99; and Rosmarinus, 101.

For External Use

Acid. Acetic, 5; Acid. Carbol.,6; Acid. Hydro-cyan., 8; Acid. Salicyl., 11; Acid. Sulphuros., 11; Ammon. Iodid., 15; Argent. Chlorid., 20; Argent. Nitras, 21; Calcii Sulphid., 35; Crea-sotum, 48; Hydrargyrum, 60; Hydrarg. Chlor. Cor., 64; Hydrarg. Chlor. Mite, 65; Hydrarg. Iod. Rub., 65; Hydrarg. Iod. Vir., 65; Mais Guasto, 75; O1. Oryzae, 79; Opium, 81; Potass. Sulphid., 95; Sulph. Iod., 109; Tong Pang Chong, 111, and Thymol, 111.