CHAPTER XI

CHRONIC DISEASES.--DISEASE OF THE HEART AS AN EXAMPLE.--THE STRUCTURE AND FUNCTION OF THE HEART.--THE ACTION OF THE VALVES.--THE PRODUCTION OF HEART DISEASE BY INFECTION.--THE CONDITIONS PRODUCED IN THE VALVES.--THE MANNER IN WHICH DISEASE OF THE VALVES INTERFERES WITH THEIR FUNCTION,--THE COMPENSATION OF INJURY BY INCREASED ACTION OF HEART.--THE ENLARGEMENT OF THE HEART.--THE RESULT OF IMPERFECT WORK OF THE HEART.--VENOUS CONGESTION.--DROPSY.--CHRONIC DISEASE OF THE NERVOUS SYSTEM.--INSANITY.--RELATION BETWEEN INSANITY AND CRIMINALITY.--ALCOHOLISM AND SYPHILIS FREQUENT CAUSES OF INSANITY.--THE DIRECT AND INDIRECT CAUSES OF NERVOUS DISEASES.--THE RELATION BETWEEN SOCIAL LIFE AND NERVOUS DISEASES.--FUNCTIONAL AND ORGANIC DISEASE.--NEURASTHENIA 219