Paper, 'Preliminary note on a new magnetometer' by W Stroud

Description

Stroud writes: 'The determination of the horizontal component of the earth’s magnetic field is of great importance, not only for the purpose of magnetic surveys, but also for the determination of the absolute strength of an electrical current, a measurement frequently required, not only for scientific work of various kinds, but also for the calibration of ammeters and voltmeters, and other electrical measuring instruments. The usual method of measuring this important quantity is that of Gauss, but the method is so long and laborious, and the apparatus requisite for accurate determination so expensive, that the measurement of H is avoided whenever practicable. The writer, having devised an instrument capable of determining H with great expedition and accuracy, ventures to think that a description of the instrument may not be without interest.'

Annotations in pencil and ink. Includes one page of diagrams of the magnetometer.

Subject: Magnetism / Scientific apparatus and instruments

Received 30 May 1890. Read 19 June 1890. Communicated by Arthur William Rucker.

A version of this paper was published in volume 48 of the Proceedings of the Royal Society as 'Preliminary note on a new magnetometer'.

Reference number

PP/16/26

Earliest possible date

1890

Physical description

Ink and graphite pencil on paper

Page extent

15 pages

Format

Manuscript
Diagram