This edition has been brought up to date in every respect, many chapters having been rewritten, and new sections added on the "Metabolism of Normal Pregnancy," "Vaginal Cesarean Section," and "Pubiotomy and Contractions of the Pelvic Outlet."
In regard to the etiology of the vomiting of pregnancy, the author refers to his monograph, published in 1906, in which he stated that the present knowledge of the subject justified the differentiation of three types of serious vomiting of pregnancy: reflex, neurotic and toxemic. The reflex variety, of course, is dependent on some abnormality elsewhere in the body. The neurotic type he considers allied to hysteria and readily amenable to suggestive treatment. The toxemic variety is associated with profound disturbance of metabolism manifested by characteristic changes in the urine and the presence of definite changes in the liver and kidneys. He refers to the fact that it was first shown in his