Inventory no. 53211 - Former Display Label
32
Flemish ASTROLABE
1560
Signed, on the back, "Æigidius cuiniet antuerpianus facieb. A°. 1560". Brass.
1 plate, engraved on one side as a tablet of horizons and on the other side, (which is the side shown) with a map of the world from the Tropic of Capricorn to the North Pole. A circle of degrees of longitude (starting at 0° in the Azores) surrounds the map, and it is possible to find latitudes by using the graduated moving rule. Geographical plates were used to find local time. The rete is constructed for 8 stars only, all within the ecliptic.
On the back is a sundial of the Geminus type with a trigonus as described by Gemma Frisius, in his edition of Apianus' Cosmographia (1584). The sundial enables the user to find, in addition to the time, times of sunrise and sunset and the duration of twilight.
[IC 224]
Lewis Evans Collection