[BITList] Trickle-down effect
chakdara at btinternet.com
Thu Mar 4 16:55:33 GMT 2010
I can't find my sources, so I speak from memory. I wrote an essay for the
OU on public health in early Victorian times, drawing on local sources, and
I came across what I believe was Simpson's sand bed filter, the earliest
recorded of that type. However, I got some brownie points for finding an
earlier filter of the same type, developed by Robert Thom in Greenock to
produce clear water for the mills on the Shaw's Water Works, early 1820s.
It is ironic that, while the sheets were being kept white, the population of
the town below were dying from polluted water.
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