Psoriasis is well known to be one of the most obstinate of all diseases of the skin, discouraging alike the physician and patient, and one which often persists for many years, or recurs, in spite of various attempts at cure, While, under proper and energetic local treatment, it is often possible to remove the existing lesions in a shorter or longer time, the tendency to a recurrence of the eruption is so strong that some have regarded the disease as incurable, and too often have only attempted to give relief to the cutaneous symptoms present, principally by local means.
It is to be noticed that writers who base their judgment on cases seen in public practice, and who dwell principally on the local treatment of psoriasis, speak most discouragingly in regard to the possibility of its permanent cure, while certain others, who study the disease in its broadest aspects, express