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17331814, Mar 8
a Scottish watchmaker and instrument inventor, who was the first to patent a design of the flush toilet, that had been invented by Sir John Harrington. The S-trap (or bend) was invented by Cumming in 1775 to retain water permanently within the bowl, thus preventing sewer gases from entering buildings. It survives in today's plumbing modified as a U- or J-shaped pipe trap located below or within a plumbing fixture. He also wrote a treatise on watchmaking.
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