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Date: |
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Description: | Douglas Johnson Young California U.S.A.
The octant has a grey plastic plate, a plastic handle and a stiffening bar on the back. It has one blue plastic index shade and no tangent or clamping screw. Index and horizon-glass adjustment is made by screws with an Allen key. Attached to the octant is a plastic, non-adjustable telescope bracket. The fixed plastic sight-tube is 32 mm in length with three plastic shades in blue, yellow, and green. Accompanying the octant is an Allen key. The octant has no box.
The instrument has a grey plastic scale from -35� to 100� by 1�, measuring from -14� to 100�. The octant has a plastic vernier measuring to 2 arcminutes, with zero at the left.
This instrument has been identified as an octant, because it measures up to 105 degrees. The iventor, however, identified the object as a sextant.
AUDIT - object needs marking with its ID number.
caption: Octant - Front
caption: Octant - Back
caption: unavailable | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Sextant Douglas Johnson Vernier Young sextants | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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