| RefNo | AP/31/10/2 | 
| Level | Item | 
| Title | Unpublished diagram, electric charge by Carlo Matteucci | 
| Creator | Matteucci; Carlo (1811-1868); Italian physicist; neurophysiologist | 
| Date | 1849 | 
| Description | A small diagram showing a rectangle with a positive charge at one end and a negative charge at the other. 
 Subject: Electricity
 | 
| Extent | 1p | 
| Format | Diagram | 
| PhysicalDescription | Ink on paper | 
| AccessStatus | Open |