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The two volumes before us surpass in several points any previous publication by this State Board. Part I, containing 850 pages, is devoted to the examinations of water supplies and inland waters, made from 1887 to 1890, by engineers, chemists, biologists and health officials, under the supervision of Mr. Hiram F. Mills, engineer member of the Board, whose elaborate classifications and tabulations form the principal part of the first volume. Suitable maps, plates, photo-micrographs and charts abound in the two volumes. Part II, comprising 900 pages, describes the experimental investigation on the purification of sewage by filtration and by chemical precipitation, also on intermittent water filtration, and on the beginnings of bacteriological research, both as to water and sewage. This latter research is under the direction of Professor W. T. Sedgwick, State Biologist, and is the means of bringing to the front some original discoveries by Mr. E. O. Jordan,
Massachusetts State Board of Health Report for 1890. JAMA. 1891;XVII(17):651. doi:10.1001/jama.1891.02410950039011
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