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    • 1775

    This mezzotint by William Pether, after the 1771 painting by Joseph Wright of Derby, shows a kneeling alchemist in his laboratory, gazing in wonder at the results of his latest experiment. The painting's full original…

    • circa 1967

    This instrument was developed by Beckman Instruments' Advanced Technology Operations (ATO) in 1967 for the United States Navy. It was designed to detect chemical warfare agents aboard a ship via air samples introduced…