Clock

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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 observe the Transit of Venus in 1761.

In 1769, Winthrop considered sending it on a transit expedition to Lake Superior with a Harvard tutor. The expedition was cancelled, and Winthrop observed the Transit from Cambridge with a better clock by Ellicott.

Source

Object contributed by Collection of Historical Scientific Instruments, Harvard University