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Description: | In July 1816, Edward Troughton's 10-foot transit instrument replaced Bradley's earlier one, and reconfirmed Bradley's meridian as the Prime Meridian for the Observatory until December 1850. The telescope itself was regularly calibrated by taking sightings off a number of distant markers. In 1824, a granite obelisk was erected at Chingford, Essex, some eleven miles to the north. The Bradley Obelisk, as it is known, still stands.
Parts in KB1288 9B. negative number A2837
caption: Troughton's 10 foot transit instrument, 1816 in the Meridian Building
caption: Troughton?s 10-foot Transit Instrument, Bradley's Transit Room ROG | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Refracting telescope The Old Royal Observatory Greenwich Observatory Telescopes transit instruments John Pond Transit Instrument | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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