Battle of Trafalgar, 21 October 1805.
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Refracting telescope without a tube, designed by Christiaan Huyghens c1650 (1724).
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Ptolemy, Alexandrian Greek astronomer and geographer, 1508.
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Cometa, qui anno Christi, 1742. Artist: Seutter, Matthaeus (1678-1757)
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William Herschel's reflecting telescope with focal length of 40 feet, Slough, England, 1809.
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Ptolemy (Claudius of Ptolemaeus), Alexandrian Greek astronomer and geographer, 1618.
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William Herschel's 20ft telescope erected at Feldhausen, Cape of Good Hope, 1834-1838 (1847).  Artist: G H Ford
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Jean Dominique Cassini (1625-1712), Italian-born French astronomer.
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Edwin Powell Hubble (1899-1953), American astronomer, in the obsevatory.
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200 inch Hale telescope at Palomar Observatory, California, at night, c1948.
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George Ellery Hale (1868-1938), American astronomer, observing sunspots, 1907.
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Frederick II, The Great (1712-1786), King of Prussia from 1740, at the Battle of Rossbach, 1757.
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Ptolemy, Alexandrian Greek astronomer and geographer, 1508.
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Isaac Newton (1642-1727), English mathematician, astronomer and physicist, 1738. Artist: Jacobus Houbraken
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Dominique Francois Jean Arago (1786-1853), French astronomer, physicist and politician.
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Title page of Quadrans Apiani by German mathematician and astronomer Peter Apian, 1532.
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Ralph Abercromby (1734-1801), Scottish general, at the Battle of Aboukir Bay, Egypt, 1801, (1833).
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Ralph Abercromby (1734-1801), Scottish general, 1801. Artist: John Kay
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Ralph Abercromby (1734-1801), Scottish soldier. Artist: H Robinson
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Pascal's digital counting machine of 1642, 1751-1780.
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Clerk using a Pascal adding machine, 1835.
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George and Edward Scheutz's calculating machine.
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Foucault's pendulum in the Pantheon, Paris, 1851 (1887).
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Foucault's pendulum which demonstrated the Earth's rotation and the concept of inertia, c1895.
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Repeat of Foucault's demonstration of the Earth's rotation, May 1851 (c1890).
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