| RefNo | AP/54/4/5 |
| Level | Item |
| Title | Unpublished figure, 'Potentiometer' by W J [William James] Welch |
| Creator | Welch; William James |
| Date | [1872] |
| Description | An engraving of an elaborate potentiometer circuit setup on a wooden table.
Subject: Physics / Electricity / Scientific apparatus and equipment. |
| Extent | 1p |
| Format | Drawing |
| PhysicalDescription | Ink and graphite pencil on paper |
| AccessStatus | Open |