100 Fixing the Calendar 1582
Water Purification 1829
Download 80.5 Kb.
|
| 46 Water Purification 1829
A PERSON consumes 16,000 gallons of water in a lifetime. But before 1829, when the Chelsea Water Works of London installed its landmark slow-sand filter on the Thames River, no one had effectively cleaned it. Even after 1829, most drinking water remained unfiltered and epidemics of cholera and typhoid made sanitation an urgent issue. Finally, in 1854, physician John Snow, though ignorant of bacteria carried in water, traced an outbreak of cholera to a pump near a sewer. The filtration of drinking water (plus the use of chlorine) is probably the most significant public health advance of the millennium. Directory: uploads uploads -> Necessity of ending the economic, commercial and financial blockade imposed by the United States of America against Cuba uploads -> Raíces y Sueños: the Artistry of Cuba Call for Art – Exhibit Application uploads -> Why did democracy develop in Britain after 1850? Introduction uploads -> Draft land restitution policy uploads -> Chapter 10: a new civilization emerges in western europe uploads -> Landmark Supreme Court Cases uploads -> Civil Rights Movement Unit Summary uploads -> Lesson plan template Download 80.5 Kb. Share with your friends:
|