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The sixth edition of this well known manual continues to embody the features that have recommended it since its first publication. It is always difficult in such a work to keep the pages abreast of current progress. We note (page 117) that the discussion of the New York water supply is somewhat antiquated, no reference being made to the new Catskill system. Again we find (page 125) that the continuous process of sand filtration is said to be in useat Hamburg, although it has been many years since that city resorted to ground water sources. The latest report of the Committee of the American Public Health Association on Standard Methods of Water Examination does not seem to have been consulted in formulating the discussion of bacterial examination of water on pages 148 and 149. The paragraphs on Rocky Mountain spotted fever (pages 416-418) are quite out of date. A few
The Principles of Hygiene. A Practical Manual for Students, Physicians and Health Officers. JAMA. 1918;71(6):489. doi:https://doi.org/10.1001/jama.1918.02600320073028
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