A Method of Determining Dielectric Constants of Liquids by Undamped Oscillations

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Excerpt from A Method of Determining Dielectric Constants of Liquids by Undamped Oscillations: ThesisThe first published results on the measurements of dielectric constants were those obtained by Faraday in his classical experi ments in which he demonstrated that the capacity of a condenser de pends upon the substance used as a dielectric. (experimental Re searches in Electricity, vol.i, p Finding that the capacity 0 a condenser in which sulphur was used as a dielectric was times as great as that of the same condenser with air as the dielectric, Faraday termed this value the Specific inductive capacity of sul phur. The term dielectric constant, however, has been more genera ly used of late years. Previous to the year 1889, all methods of determining the dielectric constant of a substance made use of elec tric fields set up by either direct or slowly alternating currents. The discoveries of Hertz in 1888 suggested new methods in which high frequency currents were employed. The first of these methods, that of j.j. Thomson, was developed in 1889, and employed a frequency of approximately twenty five millions. A11 high frequency methods may be divided into three general classes: (1) those based upon Maxwell' electromagnetic theory of light, (2) capacity methods, and (3) those based upon the theory of dielectric polarization.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.