| RefNo | PP/21/8 |
| Previous numbers | PP/51-53/10 |
| Level | File |
| Title | Paper, 'Magnetic viscosity' by John Hopkinson, E Wilson and Francis Lydall |
| Creator | Wilson; E (fl 1892-1893) |
| Lydall; Francis (1872-1950); British engineer |
| Date | 1893 |
| Description | The authors write: 'The following experiments were carried out in the Siemens Laboratory, King’s College, London, and are a continuation of experiments by J Hopkinson and B Hopkinson, a description of which appeared in the ‘Electrician,’ September 9, 1892. In that paper determinations were given of curves showing the relation between the induction and the magnetising force, for rings of fine wire of soft iron and steel, through complete cycles with varying amplitudes of magnetising force, both with the ordinary ballistic method and with alternating currents of a frequency up to 125 complete periods per second.'
Annotations in pencil and ink. Includes 12 pages of diagrams of experimental apparatus and results.
Subject: Electromagnetism / Physics
Received 3 March 1893 / 13 April 1893. Read 20 April 1893.
A version of this paper was published in volume 53 of the Proceedings of the Royal Society as 'Magnetic viscosity'. |
| Extent | 24p |
| Format | Manuscript |
| Diagram |
| PhysicalDescription | Ink and graphite pencil on paper |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| RelatedMaterial | DOI: 10.1098/rspl.1893.0023 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8063 | Hopkinson; John (1849 - 1898); electrical engineer | 1849 - 1898 |