The Filtration of Public Water-Supplies

Abstract

Sand filters, rates of flow, and what actually passes through The Filtration of Public Water-Supplies by Allen Hazen, 1905, reset and given away free. The original text stands on its own. This edition's only claim is that the work is public domain, that it has been set faithfully, and that it costs nothing. Audiences: Working operator — Runs the equipment daily and was never formally taught the theory behind it. Buyer or specifier — Has to judge a quotation or a specification without the vocabulary to test it. Reader of engineering history — Wants the primary text, not somebody's summary of it. Note: written from Indonesian operator context. Frameworks apply broadly to other emerging-market and SME settings.