SCOTLAND

Around the World November 1, 2011

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SCOTLAND: The repaving of a University of Edinburgh quad has revealed labware and chemical samples probably belonging to Joseph Black, the 18th-century chemist best known for discovering carbon dioxide. Among the test tubes and thermometers, as well as loose samples of mercury and arsenic, were ceramic jars and crucibles, some still holding chemical residues, likely made by famed potter (and Charles Darwin's grandfather) Josiah Wedgwood.

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