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Since this work was last revised in 1921, the present edition has required the addition of much newmaterial. Furthermore, certain parts of the original text have been deleted, although the material of historical interest has been retained. In England new legislation, such as the Public Health Act of 1936, the Housing Act of 1936 and the Food and Drug Act of 1938, has had a distinct influence in social conditions and a description of these acts is included in the text. The early chapters deal with air, water, food, soils, refuse and excreta disposal, and personal hygiene. There is also included material on speech and its disorders, oral hygiene, first aid, vital statistics and the climate and weather. While an attempt has been made to bring the book up to date, recent discoveries are not always included. For example, vitamin B2 is considered as the pellagra-preventive factor. The prevalence
Notter & Firth's Hygiene. JAMA. 1941;117(3):234. doi:10.1001/jama.1941.02820290076035
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