Horizontal dial

Portable horizontal dial for latitude 49°. The dial-plate is oval shaped. On its obverse side, the hour scale is depicted on a scroll. Hour-lines radiate from a central circle enclosing the scroll, which is inscribed 'Pour 49 De' [for 49 degrees]. The gnomon is simply shaped and engraved with birds, flowers and leaves. It is hinged, and folds flat when not in use. On the reverse side, there is a plain gnomon brace and the compass base is engraved with circular floral decoration. On the compass, the meridian line is marked, as is North, but no magnetic variation is indicated. It has a blued needle, with an open circle for North, surmounted by a brass pyramidal pivot. There is a convex glass cover over all. The dial-plate is supported by the compass and two turned silver legs.
This dial (and AST0324/ AST0325) are very similar examples of the French dials produced at the end of the 18th century. On the obverse side, it is signed 'Chapotot AParis'.

For more information regarding this dial please refer to the OUP & NMM catalogue, 'Sundials at Greenwich'.

Object Details

ID: AST0298
Collection: Astronomical and navigational instruments
Type: Horizontal dial
Display location: Not on display
Creator: Chapotot
Date made: Late 17th century
Credit: National Maritime Museum, Greenwich, London, Caird Collection
Measurements: Overall: 7 x 38.5 x 50.5 mm
Parts: Horizontal dial

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