Clark and Weston Standard Cells (Classic Reprint)

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Excerpt from Clark and Weston Standard CellsThe need of a definite and universal system of electrical units was early recognized. Owing to its preponderating importance in the earlier applications of electricity, the unit of resistance naturally received first attention. The committee on electrical standards appointed by the British Association in 1861 recommended the adoption of the C. G. S. Electromagnetic system together with a practical system defined as decimal multiples and submultiples of the C. G. S. Units. In addition, its labors led to the construction of concrete standards of resistance in the form of coils of platinum silver of special design adjusted to represent 10° C. G. S. Units as determined by a series of absolute measurements.The definition of unit current and electromotive force in terms of the C. G. S. Units long met every requirement, particularly as currents were generally measured by the aid of the tangent galvanometer, while electromotive forces were generally measured in terms of the electromotive force of the Daniell cell.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.