| Date |
ca. 1260 |
| Place |
Spain |
| Material |
Brass |
| Inventory no. |
37878 |
| Acquisition |
Presented by Lewis Evans in
1924 |
Rule, Regula, Pointer and Alidade Images
Alidade Image:
Rule Image:
Rule
| Appearance |
Tip |
Sights |
Pinholes |
Notches |
Description |
| Double-ended, counter-changed,
replacement. |
Simple |
None |
None |
None |
Although this rule
is certainly a very early addition to the instrument, it
was made of a slightly different metal and engraved in a
slightly different style. The style reflects the style
used when somebody re-engraved some of the tympans and
the limb.
This suggests that the rule was added at the same time
that the tympans were re-engraved.. |
Scales
| Range & Units |
Numbered |
Geometry |
Location |
| Declination |
20 - 90 |
Every 15 |
Linear |
Rule, right arm |
Alidade
| Appearance |
Tip |
Sights |
Pinholes |
Notches |
Description |
| Double-ended, counter-changed,
original. |
Gothic, simple |
Rigid |
Double |
None |
|
