Astronomical compendium lunar volvelle

Lunar volvelle for the astronomical compendium for latitude 48° North. Beneath this, a lunar volvelle, consisting of two brass discs, is set into the remaining body of the instrument. The outer disc has a lunar-age scale and an hour scale. The rotatable brass disc has a pointer, an hour scale and a circular aperture revealing a pictorial display of the phases of the moon.

Object Details

ID: AST0415.4
Type: Astronomical compendium lunar volvelle
Display location: Not on display
Creator: Unknown
Date made: 17th century
Credit: National Maritime Museum, Greenwich, London, Caird Collection
Measurements: Overall: 48 mm; Diameter: 44 mm
Parts: Astronomical compendium