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Isaiah Lukens (1779-1846), American clockmaker and gunmaker. Lukens took over his father's instrument-making shop in Philadelphia, Pennsylvania, USA and became renowned for his high-quality clocks and guns. He worked particularly on developing the air-rifle, a gun using compressed air to fire bullets. One of his guns was used on the 1804-6 expedition to the Pacific coast led by Captain Meriwether Lewis and Second Lieutenant William Clark.
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