Paper, 'On a magnetic balance, and experimental researches made therewith' by D E [David Edward] Hughes

Description

Hughes writes: 'In a paper "On the Molecular Rigidity of Tempered Steel" [Proceedings of the Institution of Mechanical Engineers, volume 34], I advanced the theory that the molecules of soft iron were comparatively free as regards motion amongst themselves, whilst in hard iron or steel they were extremely rigid in their relative positions. I have since widened the field of inquiry by observing the effects of mechanical compression and strains, as well as annealing and tempering, upon the magnetic capacity of sixty varieties of iron and steel, ranging from the softest Swedish iron to the hardest tempered cast steel.'

Annotations in pencil and ink.

Subject: Magnetism

Received 10 December 1883. Read 20 December 1883.

A version of this paper was published in volume 36 of the Proceedings of the Royal Society as 'On a magnetic balance, and experimental researches made therewith'.

Reference number

PP/4/12

Earliest possible date

1883

Physical description

Ink and graphite pencil on paper

Page extent

10 pages

Format

Manuscript