HYGIENE, the science of preserving health. The subject embraces all agencies affecting the physical and mental well being of man, and requires acquaintance with physics, chemistry, geology, engineering, architecture, meteorology, epidemiology, bacteriology and statistics. On the personal side it involves con sideration of food, water and other beverages; clothing; work, exercise and sleep; personal cleanliness, special habits, such as the use of tobacco, narcotics, etc. ; and control of sexual and other passions. In its public aspect it deals with climate ; soil; character, materials and arrangement of dwellings ; heating and ventilation; removal of excreta and other waste matters; medical knowledge on incidence and prevention of disease; and disposal of the dead.
These topics will be found treated in such articles as ADULTERATION,