Shutter for observing Aurora
Shutter for observing Aurora, H.O.5, on brass foot 4" diam. sliding pillar, wedge about 6 1/2" long, 3/4" wide, rack and pinion adjustment, scale in inches and 1/10 nod 0 to 65, vernier (unusual kind). Wooden velvet covered cap for eye end, brass view tube 8 1/2" long with sliding tube, extra brass end for glass
- Materials:
- glass and brass (copper, zinc alloy)
- Object Number:
- 1911-237 Pt2
- type:
- components and diaphragms