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Nocturnal
Combined nocturnal and lunar volvelle.
Nocturnal for use with the pointers of the Great Bear
Obverse: All engraving coloured red.
Main disc: Unequal date scale anticlockwise to named month and subdivided to 5 days.
Rotatable disc: Italian hours anticlockwise to 24 hours. Main pointer has one straight edge and floral engraving in centre.
Reverse: Carries a volvelle with rotatable disc.
Main disc: Lunar age scale numbered to one day. This engraving is different from rest of instrument.
Rotatable disc: Scale divided anticlockwise to 12. Circular aperture with pictorial display of lunar phases.
Nocturnal for use with the pointers of the Great Bear
Obverse: All engraving coloured red.
Main disc: Unequal date scale anticlockwise to named month and subdivided to 5 days.
Rotatable disc: Italian hours anticlockwise to 24 hours. Main pointer has one straight edge and floral engraving in centre.
Reverse: Carries a volvelle with rotatable disc.
Main disc: Lunar age scale numbered to one day. This engraving is different from rest of instrument.
Rotatable disc: Scale divided anticlockwise to 12. Circular aperture with pictorial display of lunar phases.
For more information about using images from our Collection, please contact RMG Images.
Object Details
| ID: | AST0120 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Nocturnal |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1625 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 5 x 115 x 83 mm |