| RefNo | AP/16/17/1 |
| Level | Item |
| Title | Unpublished letter, regarding a design for a fire poker from Heinrich Karl to the President of the Royal Society |
| Creator | Karl; Heinrich (fl 1835) |
| Date | 1 June 1835 |
| Description | Karl shares a design for a new fire poker. Includes coloured figure labelled 'Der von Heinrich Karl Verbesserte Feuerhaken' [Improved fire poker by Heinrich Karl].
Subject: Engineering / Metallurgy |
| Language | German |
| Extent | 3p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |