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Astronomical pendulum by Utzschneider und Fraunhofer, used by the 1874 Dutch expedition on Reunion The director Frederik Kaiser of The Leiden Observatory bought this pendulum clock in 1838. It has a compensated pendulum after Mahler. The clock was lent to the 1874 Dutch expedition to Reunion. Utzs... | Clock Clock by Thomas Tompion, London, ca. 1675. As the most accurate clock at Harvard in 1761, this one-hundred-year old, "excellent pendulum clock" was taken to Newfoundland by John Winthrop to obser... | Clock, Regulator Astronomical regulator clock made in London by John Ellicott ca. 1765 to replace similar clock lost in the Harvard Hall fire of 1764. |
Pendulum clock by D. Quare, London 1701 One of the older clocks used in the Bologna Specola, by Daniel Quare (1649-1724). It has inlaid wooden case, dial plate in silver and inlaid brass. The hours on the dial are in Roman numbers, the minu... | Sidereal Clock Sidereal clock (regulator) marked "E. Howard & Co., Boston". This was one of eight precise sidereal clocks made for the American Transit of Venus expeditions of 1874. It was also used by Albert Mi... |
