4 October 1821: The death of John Rennie, one of the greatest engineers of his age who designed many bridges, canals, and docks.
1675 Dutch mathematician Christiaan Huygens patents the pocket watch
4 October 1821: The death of John Rennie, one of the greatest engineers of his age who designed many bridges, canals, and docks.
1675 Dutch mathematician Christiaan Huygens patents the pocket watch
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