This work appeared in instalments in the Archives of Pediatrics, prior to its issue in book form. The authors have made an excellent systematic work upon the heart with especial reference to its diseases as they occur in infancy and childhood. Modern periodical literature has been most carefully culled, so that we find in this work a synopsis of the most recent researches into the pathology and therapeutics of the heart. Its contents are embraced in ten chapters which describe the following subjects: Methods of Study; Instruments; Fœtal Circulation; Congenital Diseases; Malformations; Cyanosis; Acute, Chronic and Ulcerative Endocarditis; Acute and Chronic Pericarditis; Treatment of Endo- and Pericarditis; Paracentesis Pericardium; Hydro-pericardium; Hæmo-pericardium; Pneumo-pericardium; Myocarditis; Tumors, New Growths and Parasites; Valvular Disease; General Diagnosis, Prognosis, and Treatment of Valvular Disease; Cardiac Neurosis; Angina Pectoris; Exophthalmic Goitre; Diseases of the Blood, Plethora, Anæmia, Chlorosis, Pernicious Anæmia, Lukæmia, Hodgkins' Disease, Hæmophilia, Thrombosis, and Embolism.