Shadow square
| Type: | Shadow square |
| Style: | Tangent/Cotangent |
| Geometry: | Box |
| Unit of measurement: | 1/60 of quadrant radius |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 60 |
| Numbered: | Every 10 |
| Repeats: | 4 times |
| Divided every: | 10 (1/60 of quadrant radius) |
| Notes: | This is the second scale that has been graduated on the shadow square |
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| Lower half: | The lower two quadrants of the back of the instrument (Lower half) |