Stock No. | Exhibit No.18 |
Provenance | Sotheby’s, 21 Sept 2000, lot35, sold for £9,880; |
Comparative Literature | E G R Taylor, The Mathematical Practitioners of Tudor and Stuart England, 1485-1714, 1954, p.243; |
Dimensions | 1¾ inches (44 mm) diameter |
Henry Wynne, London. Circa 1680
A very rare Charles II solid silver technical aide memoire volvelle for trigonometrical calculations in navigation
£12,000
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.
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 |
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