Henry Kater's telescope Anonymous
Product images of Henry Kater's telescope
Henry Kater's telescope
Telescope used by Henry Kater for pendulum observations. Geodesist and metrologist Henry Kater (1777-1835) invented Kater's pendulum in 1817 which enabled the strength of gravity to be determined. This sight was used to view the pendulum during observations in order to avoid parallax error.
ca. 1820
- Image reference: RS-8459
- The Royal Society
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