- John Appold
John George Appold, FRS [ [http://www.biocrawler.com/encyclopedia/Biocrawler:Fellows_of_the_Royal_Society/A Fellows of the Royal Society] ] (born on 14 April 1800; died on 31 August 1865), fur dyer and
engineer, was a pioneer of the centrifugal pump: he introduced the curved vane, which he demonstrated at the Great Exhibitionat the Crystal Palacein 1851 [ [http://www.fortunecity.com/meltingpot/broadway/1211/id20.htm Centrifugal impeller] ] .
His design for a braking mechanism for laying ocean telegraph cables was incorporated in the first Transatlantic cable laid in 1857.He is commemorated with a memorial tablet inside
St Leonard's, Shoreditchand buried at West Norwood Cemetery.
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