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Plate 20 from the book Icones rerum naturalium
A longitudinal section of the stomach of a vampire bat
1821) for Martin van Marum and used at Teyler's Museum at Haarlem in the Netherlands
Wilhelm Conrad Roentgen, German physicist Finish:Float frame View showing Park LaneWilhelm Conrad Roentgen, German physicist, (c1924). On 8 November 1895, Roentgen (or Rntgen, 1845 1923) discovered what came to be known as 'X rays'. He noticed that when a current was passed though a Crookes tube covered with a piece of black card, a nearby piece of paper painted with barium cyanide fluoresced. Later, he found that these X rays passed through flesh, enabling the bones to be clearly seen. In 1901, he was the first recipient of the
