D8813_1

Obverse of Horary quadrant Long Caption: This horary quadrant corresponds almost exactly with that described by John Collins in 'The Description and Uses of a Great Universal Quadrant, London, 1658', and John Collins's 'The Sector on a Quadrant' with illustrations engraved by Henry Sutton. The backs of the two instruments are, however, very different and most of the scales on the front of the present example appear on the reverse of the one illustrated in the book. The quadrant can be used for all the standard operations that the Gunter quadrant performs, as well as acting as a sector and assisting in the construction of sundials. Credit line: National Maritime Museum, Greenwich, London Object: NAV1042 Artist: Henry Sutton Date: 1658 Medium: wood; paper; brass Size: Overall: 15 x 305 x 280 mm Click here to buy a bespoke print of this image.