| Reference number | AP/11/23 |
| Level | Item |
| Title | Unpublished paper, 'On the nature and properties of straight lined angles' by J [John] Walsh |
| Date | 15 January 1825 |
| Description | Walsh provides a new definition of a right angle, or straight lined angle, and attempts to address difficulties in the theory of parallels. A later version of this paper is found at AP/11/25.
Subject: Mathematics
Written by Walsh in Cork [Ireland]. |
| Extent | 3p |
| Format | Manuscript |
| Physical description | Ink on paper |
| Digital images | View item on Science in the Making |
| Access status | Open |
| Related records in the catalogue | AP/11/25 |