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Inventory no. 40933 - Former Display Label

English OCTANT or HADLEY'S QUADRANT
c.1750

Mahogany, brass, etc., with inlaid box-wood scale. Signed, "E* NAIRNE* LONDON"; undated.

Instead of there being a vernier on the slider, the slider moves over a scale calibrated with transversals for reading minutes of arc, as in Hadley's original quadrant.

[C. 922]
Clay Collection.

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