Shadow square
| Type: | Shadow square |
| Style: | Tangent/Cotangent |
| Geometry: | Box |
| Unit of measurement: | Fingers |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 12 |
| Numbered: | every 3 |
| Repeats: | 2 times |
| Divided every: | 3 (Fingers) |
| then every: | 1 (Fingers) |
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| b: | Left hand bottom face of the shadow square (in LL) (b) |
| c: | Right hand bottom face of the shadow square (in LR) (c) |
Inscription(s):
| Type: | Scale label |
| Content: | UMBRA RECTA |
| Translation: | |
| Language: | Latin |
| Script: | Italic |
| Notes: | |
| ---------- | |
| Type: | Scale label |
| Content: | Scala Altimetra |
| Translation: | |
| Language: | Latin |
| Script: | Italic |
| Notes: | Found just underneath the shadow square. |
| ---------- |