Split-lens eyepiece micrometer
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LicenseSplit-lens eyepiece micrometer by Troughton and Simms acquired
Science Museum Group
© The Board of Trustees of the Science Museum
Split-lens eyepiece micrometer by Troughton and Simms acquired for the 1874 transit of Venus and used in Egypt with (Smyth) refracting telescope by Dollond mounted on English type equatorial mounting. It was used by by Captain Browne at Mokattan near Cairo in Egypt with the Smyth telescope to measure the position of Venus during the transit as the planet moved across the Sun in 1874.
Details
- Category:
- Astronomy
- Object Number:
- 1929-949 Pt6
- Measurements:
-
Box (closed): 95 mm x 280 mm x 160 mm, 1.22 kg
- credit:
- Donated by the Royal Observatory, Greenwich
