Shutter for observing Aurora

Made:: 1870-1890

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) and wooden case. Wooden velvet covered cap for eye end, brass view tube 8 1/2" long with sliding tube, extra brass end for glass

Details

Category:: Astronomy

Object Number:: 1911-237

Materials:: brass and glass

type:: ancillary instruments and diaphragms

credit:: British Admiralty (Hydrographic Department)

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Parts

Case for Aurora shutter

Measurements:: overall: 90 x 370 x 210 mm

Materials:: painted pine

Object Number:: 1911-237 Pt1

type:: components , storage boxes and instruments

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