Cotangent
| Type: | Cotangent |
| Style: | Cotangent, arc |
| Geometry: | Circular, concentric |
| Unit of measurement: | Feet |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 25 |
| Numbered: | every 1 |
| Repeats: | 1 times |
| Divided every: | 1 (Feet) |
| Notes: | The scale is numbered for every unit to 11. It is further graduated to 25 but not numbered |
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| 4: | Lower right quadrant of outer circular on back of instrument. (4) |