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The British Association: Section A—Mathematical and Physical Science

    Abstract

    On Loss of Heat by Radiation and Convection as affected by the Dimensions of the Cooling Body; and on Cooling in l'acuum, by J. T. Bottomley.—In the course of a series of experiments on the heating of conductors by the electric current, which were carried on during the past winter, I obtained a considerable number of results which both gave me the means of calculating the emissivity for heat in absolute measure of various surfaces under different circumstances, and also caused me to undertake a number of special experiments on the subject. These experiments are still in progress, and I am making preparation for a more extended and complete series; but a brief notice of some of the results already arrived at may not be without interest to the British Association.

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