Speculum mirror of 2 1/2-inch aperture
- Object Number:
- 1938-713 Pt2
- type:
- components , concave mirrors and metal mirrors
Cassegrain reflecting Telescope of 2 1/2-inch aperture, by James Short, London [224/908 = 9.6] on claw foot pillar stand with divided object-lens micrometer in wooden case.