| Reference number | PP/13/28 |
| Previous numbers | PP/45/31 |
| Level | Item |
| Title | Paper, 'Recalescence of iron' by J [John] Hopkinson |
| Date | 1889 |
| Description | Hopkinson writes: 'Professor Barrett has observed that if an iron wire be heated to a bright redness and then be allowed to cool, that this cooling does not go on continuously, but that after the wire has sunk to a very dull red it suddenly becomes brighter, and then continues to cool down. He surmised that the temperature at which this occurs is the temperature at which the iron ceases to be magnetisable.'
Annotations in pencil and ink throughout.
Subject: Metallurgy
Received 7 March 1889. Read 21 March 1889.
A version of this paper was published in volume 45 of the Proceedings of the Royal Society as 'Recalescence of iron'. |
| Extent | 3p |
| Format | Typescript |
| Physical description | Ink and graphite pencil on paper |
| Digital images | View item on Science in the Making |
| Access status | Open |
| Related material | DOI: 10.1098/rspl.1888.0115 |
Fellows associated with this archive
| Code | Name | Dates |
| NA8063 | Hopkinson; John (1849 - 1898) | 1849 - 1898 |