Abstract
A SPECIAL exhibition of electrical measuring instruments opens at the Science Museum, South Kensington, on Feb. 13, and will remain on view until the middle of May. The exhibition illustrates the evolution of electrical measuring instruments, from the discovery of the fundamental principles on which they are based, up to the present day, and is substantially the same as the exhibition arranged by the British Electrical and Allied Manufacturers' Association and shown on the occasion of the Faraday Centenary Exhibition at the Albert Hall in September last. With the view of interesting the non-technical public, a series of simple demonstration experiments has been arranged to illustrate the various fundamental principles and their application to electrical measurement. Demonstrations will be given daily, the apparatus in some cases being a replica of that used by the original discoverer of the principle. The exhibition, which comprises about 250 exhibits, includes many original instruments, such as Kelvin's reflecting galvanometer, a resistance coil used, by Wheatstone, Joule's current balance, and the coil with which Maxwell determined the ohm. Among the interesting replicas are those of Orsted's Compass, with which the magnetic effect of an electric current was first demonstrated, Ampère's electrodynamic apparatus, the apparatus with which Ohm discovered ‘Ohm's Law’, and Sturgeon's electromagnetic engine, which was the first machine to embody a commutator.
Article PDF
Rights and permissions
About this article
Cite this article
Electrical Measuring Instruments. Nature 129, 230 (1932). https://doi.org/10.1038/129230a0
Published:
Issue Date:
DOI: https://doi.org/10.1038/129230a0