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Henry Wynne, London. Circa 1680

Henry Wynne, London. Circa 1680

A very rare Charles II solid silver technical aide memoire volvelle for trigonometrical calculations in navigation

£12,000


Stock No.

Exhibit No.18

Provenance

Sotheby’s, 21 Sept 2000, lot35, sold for £9,880;
The John C Taylor collection, inventory no.76

Comparative Literature

E G R Taylor, The Mathematical Practitioners of Tudor and Stuart England, 1485-1714, 1954, p.243;
Clifton, Directory of British Scientific Instrument Makers, 1550-1851, 1995; The Medal 29, 1996, D J Bryden, ‘The Medal as a Technical Aide Memoire’,
p.139-147

Dimensions

1¾ inches (44 mm) diameter

The obverse engraved with the maker’s signature, H. Wynne fec. and Iungit Consimiles eadem Proprio Partes (trans: ‘similar things in the same proportion’), the centre occupied by five diagrams of spherical triangles, and the lower part of the band with an example. The reverse with a rotatable disc engraved with a spherical triangle with named parts which may be set against sine and tangent divisions on the fixed rim.

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Product Description

The obverse engraved with the maker’s signature, H. Wynne fec. and Iungit Consimiles eadem Proprio Partes (trans: ‘similar things in the same proportion’), the centre occupied by five diagrams of spherical triangles, and the lower part of the band with an example. The reverse with a rotatable disc engraved with a spherical triangle with named parts which may be set against sine and tangent divisions on the fixed rim.

Additional information

Dimensions 5827373 cm