+
-
Horary quadrant with Gunter projection
This Horary quadrant with Gunter scales is a typical example of the cheaper type of Gunter quadrant being produced in the first half of the 18th century.
Boxwood quadrant fitted qith two brass peep-hole sights on one edge (plumb bob a geometrical square at apex, graduated 0-50-0. Equinoctial graduated 6-11,10-90.Declination scale, graduated 0-24. Meridian scale, graduated 8-1,12,10-50. Circle of months and the limb of instrument graduated 0-90. At centre of instrument are the Ecliptic Horizan line 10-30. 12 h line of winter, 12h line of summer & E-W Azimuth line decorated with 3 "rose" stamps.
Back of instrument: Inscribed with a circle of hours I-XII, I-XII at the centre of qhich is a volvelle 3.5" dia, inscribed with the celestial vault. Deted with 3 "rose" stamps and a "fluer de lys".
Boxwood quadrant fitted qith two brass peep-hole sights on one edge (plumb bob a geometrical square at apex, graduated 0-50-0. Equinoctial graduated 6-11,10-90.Declination scale, graduated 0-24. Meridian scale, graduated 8-1,12,10-50. Circle of months and the limb of instrument graduated 0-90. At centre of instrument are the Ecliptic Horizan line 10-30. 12 h line of winter, 12h line of summer & E-W Azimuth line decorated with 3 "rose" stamps.
Back of instrument: Inscribed with a circle of hours I-XII, I-XII at the centre of qhich is a volvelle 3.5" dia, inscribed with the celestial vault. Deted with 3 "rose" stamps and a "fluer de lys".
For more information about using images from our Collection, please contact RMG Images.
Object Details
| ID: | NAV1063 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Horary quadrant with Gunter projection |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1700 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 8 x 139 x 141 mm |