The new edition of this standard textbook has been thoroughly revised and reset in new type. Sections concerned with laboratory data have been omitted, thus offering more space for other chapters. Coronary heart disease is much more adequately described in this edition than heretofore. A section on pulmonary heart disease has been added. The sections on head and neck, tuberculosis, pulmonary emphysema, and lesions of the large intestine have been enlarged. A new chapter is devoted to the electrocardiogram. As the author stresses in the preface, no attempt has been made to describe diagnostic procedures with which he is not familiar and no space is given to the description of tests that he believes are useless.