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XEE4406522: Florin Perier measuring the height of the Barometer (mercury tube) of Evangelista Torricelli or Toricelli during the experiment on the gravity of the air of Blaise Pascal, at the top of the Puy de Dome (1648). Engraving by Yan Dargent., Dargent, Jean Edouard (Yan) (1824-99) / Bridgeman Images