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Geography, 12.10.2020 02:01 helloyall40
In 1854, London physician Dr. John Snow mapped the spatial relationship between deaths from the waterborne disease cholera and the locations of water pumps which brought in water directly from tunnels connected to the River Thames. From Snow's research it was determined that a public water pump had been contaminated by sewage.
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In 1854, London physician Dr. John Snow mapped the spatial relationship between deaths from the wate...
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