Filar micrometer, from John Smeaton's refracting telescope
Filar micrometer, part of refracting telescope by John Smeaton on equatorial mounting with stand [RAS No.7] . Presented to Royal Astronomical Society in 1845 by Mrs Sommerville to whom it was left by Mrs Dixon, Smeaton's daughter.
- Measurements:
-
overall: 85 x 270 x 150 mm
- Object Number:
- 1931-347 Pt2
- type:
- instrument component and filar micrometer