While this small volume does not apply directly to medical practice, it does contain many informative paragraphs applicable to the maintenance of health. In the preface Dr. Bedford states: "My purpose in preparing this volume has been to deal with ventilation and heating in terms of human needs." This he clearly brings out in such chapters as "Body Heat Production and Heat Loss," "Warmth and Comfort," "The Quality of the Air," "Domestic Heating" and "Effects of Atmospheric Conditions on Accident Frequency and Sickness."