EOSINOPHILIA IN DERMATITIS HERPETIFORMIS (DUHRING).

Of late years the study of the morbid changes in the blood has become a most important aid to diagnosis in many varieties of disease. Leaving out such diseases as leucemia, pernicious anemia and chlorosis, the recognition of which depends absolutely on the blood examination, medicine has been aided in malaria by the finding of the plasmodium of Laveran, in typhoid and some other acute infections by the agglutinative or "clump" reaction, in surgery in appendicitis and other suppurative affections by a pronounced leucocytosis; in gynecology, where some doubt might exist as to the exact location of a tumor, certain states of the blood would point toward the ovary as the seat of the trouble, while again the hematologic examination might lend some aid in determining its malignancy or non-malignancy. Indeed, there is no branch of medicine in which the examination of the blood might not at some time be