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ID number: BIRRC-P0322 Institution: Research and Cultural Collections Named collection: Historic Physics Collection Artist / Maker: Troughton and Simms Title / Object name: Transit Telescope Object type: Astronomical instrument Place made: London Date made: c. 1909 Materials: Brass on steel support Measurements: Telescope length 80 cm, diameter 5.5 cm Stand 45 x 25 x 51 cm |
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In 1909 to set the rate of the standard clock (P0831) it was necessary to make observations of the stars. This telescope was mounted in a South facing window at the top of the Poynting Building to determine the time of transit of a chosen star across the meridian. It was mounted to tilt only about a fixed horizontal axis so that the azimuth could be adjusted from day to day. A spirit level and scale record the azimuth. Inscriptions / Translations: Troughton & Simms London |
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