Paper, 'Experimental determinations of magnetic susceptibility and of maximum magnetisation in absolute measure' by R Shida

Description

Shida writes: 'The fact that there exists a limit to the magnetisation of a soft iron bar was first demonstrated by Joule, who, in 1840, made a number of experiments on the sustaining power of an electro-magnet, and showed that when the current in the exciting coil is made stronger and stronger, that power tends to a certain definite value, or in other words, the magnetisation of the iron core attains a maximum. In 1861, an interesting research on the magnetic properties of iron was made by Thalén, who determined, among other things, the magnetic susceptibility of different specimens of soft iron in absolute measure for the first time. The units of length, mass, and time employed by Thalén were respectively a millimetre, a milligramme, and a second.'

Annotations in pencil and ink. Includes 8 pages of diagrams of experimental apparatus and results.

Subject: Physics / Magnetism

Received 10 October 1882. Read 23 November 1882. Communicated by William Thomson.

A version of this paper was published in volume 35 of the Proceedings of the Royal Society as 'Experimental determinations of magnetic susceptibility and of maximum magnetisation in absolute measure'.

Reference number

PP/3/34

Earliest possible date

1882

Physical description

Ink and graphite pencil on paper

Page extent

52 pages

Format

Manuscript
Diagram