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Nocturnal
Nocturnal and horizontal dial for latitude 43° 45'. Set into the handle is a compass with a cover. On the obverse side is a lunar volvelle, on the reverse side is a nocturnal. The initials 'JF' are engraved on the dial-plate.
For use with Little Bear only.
Compass set into handle. Cardinal points marked, Glass cover held by brass ring.
Date scale with months by initials and zodiac signs, subdivided to 2 days.
Main disc: Hour circle divided clockwise to 30 min. Gnomon folds flat when not in use.
Lunar volvelle: Fixed circle has lunar age scale anticlockwise to 1 day. Rotatable disc has hour scale clockwise. Circular aperture displays moon phases pictorially
For use with Little Bear only.
Compass set into handle. Cardinal points marked, Glass cover held by brass ring.
Date scale with months by initials and zodiac signs, subdivided to 2 days.
Main disc: Hour circle divided clockwise to 30 min. Gnomon folds flat when not in use.
Lunar volvelle: Fixed circle has lunar age scale anticlockwise to 1 day. Rotatable disc has hour scale clockwise. Circular aperture displays moon phases pictorially
For more information about using images from our Collection, please contact RMG Images.
Object Details
| ID: | AST0134 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Nocturnal |
| Display location: | Not on display |
| Creator: | F., J. |
| Date made: | circa 1700; 17th Century |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Diameter: 19 x 115 x 70 mm |
| Parts: | Nocturnal |
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