Notices of the Proceedings at the Meetings of the Members of the Royal Institution of Great Britain, Vol. 13
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Excerpt from Notices of the Proceedings at the Meetings of the Members of the Royal Institution of Great Britain, Vol. 13: With Abstracts of the Discourses Delivered at the Evening Meetings; 1890 1892 Prof. Dewar commenced by remarking that the Royal Institution had been so closely identified with the great workers in physical science that it was impossible to allow the work of Joule, whose researches had produced as marked a revolution in Physical Science as Darwin´s in Biology, to pass without recognition in the present series of Friday Evening Discourses. Sir William Thomson, as Joules friend and fellow-worker to the last, had been invited to undertake the duty, and had agreed to do so; but at the last moment had been compelled to decline by reason of important official duties in Scotland, and the task had consequently devolved upon him. Having given a brief account of Joule´s parentage, early life, and education, Prof. Dewar reviewed, as fully as time would permit, his scientific work, which extended over about forty years, and was represented by 115 original memoirs. The first period (1838 to 1843) was distinguished as that in which Joule educated himself in experimental methods, chiefly in connection with electricity and electro-magnetic engines. This work led him in 1840 to his first great discovery, the true law governing the relation between electric energy and thermal evolution, which enabled him later on to account for the whole distribution of the current, not only in the battery in which it is produced, but in conductors exterior to it. Joule was thus led to take up the study of electrolysis. Faraday had already made the discovery that electrolytic bodies could be split up into equivalent proportions by the passage of the same electric current; Joule saw that there would be great difficulty in finding out the distribution of the current energy, and accounting for the whole of it. After a laborious research he succeeded in showing that during electrolytic action there was an absorption of heat equivalent to the heat evolved during the original combination of the constituents of the compound body. The prosecution of his electrical researches rapidly brought Joule on the road to his great discovery of the Mechanical Equivalent of Heat, it being clear from a foot-note to a paper dated 18th February, 1843, that he already had well in hand the study of the strict relations between chemical, electrical, and mechanical effects. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.
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