The back contains 11 scales of the following types:
Type (click to view scale details) |
Range & Units | Numbered | Geometry | Location |
---|---|---|---|---|
Altitude | 0 - 90, Degrees of arc | Every 5 degrees | Circular, concentric | outermost scale on the front of the limb |
Zodiacal signs | 0 - 30, Zodiacal divisions, equal or unequal | Every 10 | Circular, concentric | Circular scale immediately inside the outer scale - refers to the full circle |
Calendar | Days of year | days | Circular, concentric | Circular scale second in from the outer scale - refers to the full circle. |
Windrose | None | Circular, concentric | Circular scale third in from the outer scale - refers to the full circle. | |
Dominical letter | 1600 - 1627, None | Circular, concentric | First circle within shadow square. | |
Solar cycle | 1600 - 1627, None | Circular, concentric | Second circle within shadow square. | |
Golden number | 1600 - 1618, None | Circular, concentric | Third circle within shadow square. | |
Epact | 1600 - 1618, None | Circular, concentric | Forth circle within shadow square. | |
Perpetual calendar | None | Circular, concentric | Upper left quadrant (inside circular scales) | |
Perpetual calendar | None | Circular, concentric | Upper right quadrant (inside circular scales) | |
Shadow square | 0 - 12, Fingers | Every 2 fingers | Box | Right hand vertical face of the shadow square (in LR) |
Shadow square | 0 - 12, Fingers | Every 2 fingers | Box | Left hand vertical 'face' of the shadow square (in LL) |
Shadow square | 0 - 12, Fingers | Every 2 fingers | Box | Left hand bottom face of the shadow square (in LL) |
Shadow square | 0 - 12, Fingers | Every 2 fingers | Box | Right hand bottom face of the shadow square (in LR) |
Transcription | Translation | Notes | Type |
---|---|---|---|
Fr. Morillard Lugdunen. faciebat Narb. Anno M.VIc | Fr. Morillard of Lugdunen made it at Narbonne, 1600 | Maker's signature |