Astrolabes /
Browse / 47367
Date | 1613 |
Place | Europe |
Material | Brass |
Inventory no. | 47367 |
Acquisition | Presented by Lewis Evans in 1924 |
View all
images for this astrolabe
View
detailed provenance for this astrolabe
Mater
The mater and limb are of one-piece construction. The bottom of the limb has been cast to form a type of base or foot for the instrument. This has been decoratively engraved with a foliate pattern. Scales on the limb: unequal hours scale; degree scale. More informationBack
There is a volvelle on the back of this instrument. It bears at least two scales, numbered 2 to 22; 0 to 12; o to 21; and 0 to 11. The volvelle is shaped like a disc with the head and tail of a dragon, suggesting that this might be a set of scales used to calculate lunar nodes or eclipses. The back contains 4 scales of the following types: Degree; Zodiacal signs; Calendar; Other. More informationRete, Pin & Wedge
The rete contains 9 stars. The zodiac on the rete is labelled: ARIES , TAVRVS , GEMINI , CANCER , LEO , VIRGO , LIBRA , SCORPIVS , SAGITARIVS , CAPRICORNVS , AQVARIVS , PISCES .The rete is attached using a pin & wedge. The pin is attached to the regula. The original wedge has been lost, replaced by a small brass brad. More information
Rules & Alidades
Type | Details |
---|---|
Regula | Double-ended, counter-changed. This rule resembles
those used with universal projections and was probably
intended to serve the universal plate. However, the
cursor is now missing. |
Alidade | Double-ended, counter-changed. One of the two
sighting vanes has only one pinhole. |