Filar micrometer, from John Smeaton's refracting telescope
- Object Number:
- 1931-347 Pt2
- type:
- instrument component and filar micrometer
Refracting telescope of 1 1/2-inch aperture and 36-inch focal length by John Smeaton on an adjustable equatorial mounting with a tripod stand. The telescope is fitted with an integral filar micrometer [RAS No.7] . Presented to Royal Astronomical Society in 1845 by Mrs Somerville to whom it was left by Mrs Dixon, Smeaton's daughter.