In the first eleven editions of this excellent text R. C. Cabot followed the plan of describing only those technics with which he had had personal experience and was guided by what he called "the personal equation" in the discussion of disease. In the twelfth edition Dr. Adams drew freely from the experiences of his colleagues at the Massachusetts General Hospital and greatly enlarged the scope of the book, adding discussions of clinical entities and illustrations from recent clinical material.
In this, the thirteenth edition, there has been included, besides new photographs, illustrations and roentgenologic prints, an excellent section on inadequate cardiac output due to (a) disturbance of the heart and (b) deficient volume of circulating blood (shock). The sections on the mouth, back, pulse, classification of heart murmurs and coronary heart disease have been thoroughly reorganized. The list of clinical entities discussed throughout the entire book has been increased.