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Sendivogius original: "Sendivogius"; refers to Michael Sendivogius (1566–1636), a highly influential Polish alchemist, philosopher, and diplomat. He was famous throughout Europe for his chemical theories, particularly regarding the "food of life" found in the air, which later scientists identified as oxygen.. 1640 This date likely marks when this specific manuscript was bound or entered into a collection, occurring four years after Sendivogius’s death..