02561cam a22003253u 450000100060000000300070000600500170001300600020003000700050003200800410003704000110007804100170008905000070010610000290011324500840014226400510022630000470027733600260032433700260035033800360037650000310041250802130044352013350065653400660199165300170205765300270207485600720210185600430217399900190221669025UtSlPG20260610134609.0mcr n260607r20221900utu|||||o|||||||||||||| d  aUtSlPG 7aen2iso639-1 4aTD1 aHazen, Allen,d1869-193014aThe filtration of public water-supplies :bThird edition, revised and enlarged. 1aSalt Lake City, UT :bProject Gutenberg,c2022  a1 online resource :bmultiple file formats  atextbtxt2rdacontent  acomputerbc2rdamedia  aonline resourcebcr2rdacarrier  aRelease date is 2022-09-21  aCharlene Taylor, Brian G. Wilcox and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/American Libraries.)  a"The Filtration of Public Water-Supplies" by Allen Hazen is a scientific publication written in the early 20th century. The book discusses the critical importance of filtration systems used to purify water supplies, specifically focusing on practices in the United States compared to those in densely populated European countries. It aims to stimulate interest in improving water quality and outlines established methods and necessary conditions for effective water filtration.  At the start of the book, Hazen highlights the historical development of water filtration, acknowledging earlier efforts in the United States and contrasting them with successful European practices. He underscores the detrimental effects of using unfiltered water, referencing grave public health issues like cholera outbreaks. The introduction sets the stage for discussing the fundamental principles of filtration, the evolution of methods, and emphasizes the role of proper filtration systems in ensuring the health of urban populations. This opening portion establishes a foundation for a detailed examination of filtration technologies and their significance in public health and engineering, promising a comprehensive resource for those interested in environmental science and engineering practices. (This is an automatically generated summary.)  pOriginally published:cUnited States: John Wiley & Sons, 1900  aWater-supply  aFilters and filtration4 uhttps://archive.org/details/filtrationofpubl00haze/page/n7/mode/2up40uhttps://www.gutenberg.org/ebooks/69025  c109824d109824