1852. Contents: Nature and Uses of Physiology; Causes of the Neglect of Practical Physiology in Social Life-Slow and Insidious Origin of Disease; Religious Objections to the Study of Physiology Considered; Structure and Functions of the Skin; Conditions of Health of the Skin, and Its Influence on the General System; Nature of the Muscular System; Rules for Muscular Exercise; The Bones, Their Structure, Uses, and Conditions of Health; On the Blood and the Organs of Circulation; The Lungs, Their Structure and Functions-Respiration and Its Uses; Laws of Respiration-Conditions of Health of the Lungs; The Brain and Nerves Considered in Their Relation to the Rest of the Body and to the Mental Faculties; Conditions of Health of the Brain-Laws of Mental Exercise; Application of the Preceding Principles to the Health of the Brain and Nervous System, and to General Education; Influence of the Nervous System Upon the General Health; and Application of the Preceding Principles to the Origin and Prevention of Bad Health.