L'arteriosclerosi del piccolo circolo.

This monograph is based on a painstaking study of the literature as well as on personal experience. Abstracts of forty-eight reported cases are given. Etiology and pathology are fully considered as well as symptoms and diagnosis. The usual division is made into primary and secondary forms, the latter oftenest seen in connection with mitral stenosis. Of the primary form the author says: "Isolated pulmonary arteriosclerosis, when it occurs independently of change in the heart or respiratory apparatus, represents an essential or real affection, extremely rare, and from the etiologic point of view, quite obscure." He does not arrive at any definite conclusion as to the nature of Ayerza's disease, which has been so acutely discussed in South America particularly as to its possible relation to syphilis. Symptoms are not alone mentioned and described in detail: their origin and significance are fully taken up. The brochure is a commendable summary of