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Record Details

Rossipher Mechanical Equinoctial Dial, English, 1731

preview image for Rossipher Mechanical Equinoctial Dial, English, 1731
Object is on display.
Inventory Number: 39529
Object Type:
Place Created: England United Kingdom Europe
Accession Number: 1924-0/part
Brief Description: Turned wooden base with 3 levelling screws, magnetic compass and azimuth adjustment by rack and pinion; three curved supports to platform for latitude semicircle with rack motion, equinoctial circle, with racked adjustment for ecliptic circle with pivoted sighting arm and index.

A detailed account of the Rossipher is given in David J. Bryden, 'William Ross and a misguided means of finding longitude', The Antiquarian Astronomer: Journal of the Society for the History of Astronomy, issue 11 (June 2017), 55-68. (A PDF version is attached to this record with permission.)
Primary Inscriptions: "Wm, Ross Inventor of this his Rossipher Instmt. 1731"
Provenance: Presented by Lewis Evans.
Collection Group: Lewis Evans Collection
Material(s): Brass
Dimensions:
Height Width Depth Diameter Unit
510 mm

Narratives

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File Bryden Rossipher (application/pdf) with multimedia irn 54900

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