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21. History of the water supply of the world: arranged in a comprehensive form from eminent authorities, containing a description of the various methods of water supply, pollution and purification of waters, and sanitary effects, with analyses of potable waters : also, geology and water strata of Hamilton County, Ohio, statistics of the Ohio River, proposed water supply of Cincinnati, together with a number of valuable tables and diagrams

nlm:nlmuid-63110780R-bk