This book is made up largely of the rewritten lectures delivered by Sir William Broadbent before the Harveian Society in 1884 and also the Lumleian Lectures in 1891. These lectures dealt with "Prognosis in Diseases of the Heart." With the subject of prognosis as a nucleus, he has grouped enough pertaining to etiology, pathology, diagnosis and treatment to make a fairly complete manual of diseases of the heart. The subject of treatment in particular has been especially elaborated and is one of the strongest features of the book. The volume has grown materially since its first edition in 1897, by many additions, some of the new matter being added by the younger Broadbent so that one feels that it might have been better for the authors to have written a more nearly complete treatise and not one that is so much stronger in some parts than in others.