| Collection | GB 0231 University of Aberdeen, Special Collections |
| Level | Item |
| Ref No | MS 2131/5/I/1 |
| Alt Ref No | MS.2131.1(85i) |
| Title | 'Prop. 6. Upon the right line AK let the unequal right lines AC, BD start at right angles...’ |
| Date | [1770] |
| Description | 'Prop. 6. Upon the right line AK let the unequal right lines AC, BD start at right angles...’ 4 pp. [MS.2131.1(85i)] |
| Access Status | Open |