| Date |
late 15th century |
| Place |
France (?) |
| Material |
Brass |
| Inventory no. |
49847 |
| Acquisition |
Presented by J. A. Billmeir in
1957 |
Rule, Regula, Pointer and Alidade Images
Alidade Image:
Rule Image:
Rule Image:
Alidade
| Appearance |
Tip |
Sights |
Pinholes |
Notches |
Description |
| Double-ended, counter-changed,
original. |
Decorative |
Rigid |
Double |
None |
The rule
was not completed; one of the sighting vanes was marked
for pinholes but never pierced. |
Scales
| Range & Units |
Numbered |
Geometry |
Location |
| Declination |
0 - 70 Degrees |
Every 10 degrees |
Linear |
Rule, left arm |
| Declination |
0 - 30 Degrees |
Every 10 degrees |
Linear |
Rule, right arm |
Rule
| Appearance |
Tip |
Sights |
Pinholes |
Notches |
Description |
| Single-ended, counter-changed,
original. |
Flat |
None |
None |
None |
This rule
is to be used with the equatorium and indicates the
planetary position within the zodiac,
engraved on the limb. |
