There are few medical subjects Dr. Hare has not written upon, and his flowing pen not only ornaments the topics touched, but he seems always to hit upon the most practical way of conveying instruction. We recently had the pleasure of noticing a work on diagnosis, in which chemistry of the normal and pathologic fluids, was made to assume the chief rôle in diagnosis. Here we have a work in which semeiology, the visible symptoms with which we are confronted, is made to tell the story of the patient's pathologic condition, the natural or Hippocratic method. The work is profusely illustrated and the illustrations are fine. The title of the volume is not a misnomer in this instance, for it is indeed a practical diagnosis. An excellent index concludes the volume.