Cotangent
| Type: | Cotangent |
| Style: | Cotangent, arc |
| Geometry: | Circular, concentric |
| Unit of measurement: | Fingers |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 40 |
| Numbered: | every 5 |
| Repeats: | 1 times |
| Divided every: | 5 (Fingers) |
| then every: | 2 (Fingers) |
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| 4: | Lower right quadrant of outer circular on back of instrument. (4) |