| Collection | GB 0231 University of Aberdeen, Special Collections |
| Level | Item |
| Ref No | MS 2131/5/II/4 |
| Alt Ref No | MS.2131.1 (77) |
| Title | 'The Side of an Octahedron is the Chord of 90 [degrees]...' |
| Date | 18th century |
| Description | 'The Side of an Octahedron is the Chord of 90 [degrees]...' 1 p. [MS.2131.1 (77)] |
| Access Status | Open |