| RefNo | PP/15/11 |
| Previous numbers | PP/47/11 |
| Level | Item |
| Title | Paper, 'Physical properties of nickel steel' by J [John] Hopkinson |
| Date | 1890 |
| Description | Hopkinson writes: 'Mr Riley of the Steel Company of Scotland has kindly sent me samples of wire drawn from the material concerning the magnetic properties of which I recently made a communication to the Royal Society [see PP/15/4]. As already stated, this material contains 25 per cent, of nickel and about 74 per cent, of iron, and over a range of temperature from something below freezing to 580º C. it can exist in two states, magnetic and non-magnetic. The wire as sent to me was magnetisable as tested by means of a magnet in the ordinary way. On heating it to a dull redness it became non-magnetisable whether it was cooled slowly or exceedingly rapidly by plunging it into water.'
Annotations in pencil and ink throughout.
Subject: Metallurgy
Received 16 January 1890. Read 23 January 1890.
A version of this paper was published in volume 47 of the Proceedings of the Royal Society as 'Physical properties of nickel steel'. |
| Extent | 3p |
| Format | Typescript |
| PhysicalDescription | Ink and graphite pencil on paper |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| RelatedMaterial | DOI: 10.1098/rspl.1889.0075 |
| RelatedRecord | PP/15/4 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8063 | Hopkinson; John (1849 - 1898) | 1849 - 1898 |