|Dates: ||1799 - 1873|
|Born: ||US, PA, Huntingdon|
American inventor of chronometers and machinery who from 1843 until 1873 worked in the Office of Weights and Measures (OWM) of the U.S. Coast Survey. He developed a gauge that is believed to be the earliest instrument to record an earthquake. His Daguerreotype of the Philadelphia’s first Central High School and the State Armory in 1839, now in the collections of the Historical Society of Pennsylvania in Philadelphia, is thought to be the earliest surviving Daguerreotype taken in America.
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