Shadow square
| Type: | Shadow square |
| Style: | Tangent/Cotangent |
| Geometry: | Box |
| Unit of measurement: | Fingers |
| (Numbering) starts at: | 1 |
| (Numbering) ends at: | 12 |
| Numbered: | Every 3 |
| Repeats: | 4 times |
| Divided every: | 3 (Fingers) |
| then every: | 1 (Fingers) |
| Notes: | The scale is also graduated from 1 to 60 |
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| Lower half: | The lower two quadrants of the back of the instrument (Lower half) |
Inscription(s):
| Type: | Scale label |
| Content: | Vmbra Versa |
| Translation: | Vertical shadows |
| Language: | Latin |
| Script: | Italic |
| Notes: | This is found on both vertical sides of the shadow square |
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| Type: | Scale label |
| Content: | Vmbra Recta |
| Translation: | Horizontal shadows |
| Language: | Latin |
| Script: | Italic |
| Notes: | |
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