Date |
1559 |
Maker |
Thomas Gemini |
Place |
London |
Material |
Brass |
Inventory no. |
42223 |
Acquisition |
Transferred from the
University Observatory, Oxford, in 1936 |
Rule, Regula, Pointer and Alidade Images
Alidade Image:
Rule Image:
Alidade
Appearance |
Tip |
Sights |
Pinholes |
Notches |
Description |
Double-ended, counter-changed,
original. |
Notched |
Rigid |
Double |
None |
|
Scales
Range & Units |
Numbered |
Geometry |
Location |
Declination |
0 - 72 Degrees |
Every 10 degrees |
Linear |
Rule, right arm |
Alidade
Appearance |
Tip |
Sights |
Pinholes |
Notches |
Description |
Single-ended, original. |
Flat |
None |
None |
None |
Rule
for use with the universal planisphere. Slotted for a
cursor and bracchiolus, which are missing. |