Charles William Siemens (born Carl Wilhelm von Siemens - 1823-1883) German mechanical and electrical engineer born near Hanover. Brother of Werner von Siemens. He took British nationality in 1859. Invented the regenerative (open hearth) furnace which developed into the Siemens-Martin process for the production of large quantities of steel. Cartoon by Edward Linley Sambourne in the Punch's Fancy Portraits series from 'Punch' (London, 28 July 1883).

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