The back contains 8 scales of the following types:
Type (click to view scale details) |
Range & Units | Numbered | Geometry | Location |
---|---|---|---|---|
Degree | Degrees | Every 5 degrees | Circular, concentric | The entire outer circle on the back of an astrolabe. |
Zodiacal signs | X - XXX, Zodiacal divisions, equal or unequal | Every 10 | None | Circular scale immediately inside the outer scale - refers to the full circle |
Calendar | 0 - 30, Days of year | Every 5 days | Circular, concentric | Circular scale second in from the outer scale - refers to the full circle. |
Unequal hours | 1 - 12, 1/12 of daylight | Every hours | Angle | None |
Shadow square | 0 - 12, Feet | Every 3 feet | Box | Left hand vertical 'face' of the shadow square (in LL) |
Shadow square | 0 - 12, Feet | Every 3 feet | Box | Left hand bottom face of the shadow square (in LL) |
Shadow square | 0 - 12, Feet | Every 3 feet | Box | Right hand bottom face of the shadow square (in LR) |
Shadow square | 0 - 12, Feet | Every 3 feet | Box | Right hand vertical face of the shadow square (in LR) |
Transcription | Translation | Notes | Type |
---|---|---|---|
GEORGIVS HARTMAN NOREMBERGE, FACIEBAT ANNO MDXXXXII | Maker's signature |