disorganization begins in the superficial parts—the skin—and not until the part involved is completely destroyed does it proceed to those which are deeper, viz., the cartilage and bone. Again, it may be seen that the destruction is more complete in scrofula than in syphilis. This is especially true of the skin, for syphilis has at least a respect for this organ, which scrofula has not.” After establishing, as he says, “the principles upon which the scrofulous diathesis is founded,” he proceeds to enumerate the different _scrofulides_ of the skin as follows: 1, Erythematous; 2, Phlegmonous; 3, Pustulo-crustaciæ; 4, Tuburcular; 5, Rupiform; 6, Ulcero-gumatous. THE HERPETIC DIATHESES.—“The distinctive feature of prime import in herpetic lesions (_herpidites_) is their duration. In the two diathesis we have just considered we have said that the _scrofulides_ are continuous in their duration; they present no interruption, no intermittance; whereas the _syphilides_ are essentially intermittent; they disappear spontaneously, or under the influence of treatment, and reappear without regularity or periodicity. Their intervals of latency are variable, often regulated by the change of season, especially liable to reappear in the springtime, and sometimes after many years of complete immunity. “The _herpidites_ combine in their evolution the two characters of intermittency and chronicity. At their commencement they are intermittent; in the second stage, which occurs after a certain though variable period, they assume the character of chronicity.” The author further divides the _herpidites_ into benign and malignant. Under the former are included herpes, impetigo, lichen, eczema and psoriasis; the latter includes pemphigus, cachectic rupia and prurigo senilis formicans. The cancerous and the congestive diatheses follow, after which the exanthemata and the cachectic diseases of the skin. SYMPTOMATIC AFFECTIONS OF THE SKIN, arising from pathological, physiological and psychological disturbances are probably of more interest than any other group, because here one finds so many things not even mentioned in most works on dermatology, and because this class of affections seems destined more and more to be a common inherent of American life.