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III. An essay on the cohesion of fluidsIt has already been asserted, by Mr. Monge and others, that the phenomena of capillary tubes are referable to the cohesive attraction of the superficial particles only of the fluids employed, and that the surfaces must consequently be formed into curves of the nature of lintearias, which are supposed to be the results of a uniform tension of a surface, resisting the pressure of a fluid, e... ...
Tập 95 - Trang 65-87 - 1805
XXIV. On the nature of the function expressive of the law of human mortality, and on a new mode of determining the value of life contingencies. In a letter to Francis Baily, Esq. F. R. S. &cDear Sir, The frequent opportunities I have had of receiving pleasure from your writings and conversation, have induced me to prefer offering to the Royal Society through your medium, this Paper on Life Contingencies, which forms part of a continuation of my original paper on the same subject, published among the valuable papers of the Society, as by passing through your hands it may recei... ...
Tập 115 - Trang 513-583 - 1825
IV. On the dynamical theory of gases
Theories of the constitution of bodies suppose them either to be continuous and homogeneous, or to be composed of a finite number of distinct particles or molecules. In certain applications of mathematics to physical questions, it is convenient to suppose bodies homogeneous in order to make the quantity of matter in each differential element a function of the coordinates, but ... ...
Tập 157 - Trang 49-88 - 1867
II. On the stability of loose earth1. General Principle. The subject of this paper is,—the mathematical theory of that kind of stability, which, in a mass composed of separate grains, arises wholly from the mutual friction of those grains, and not from any adhesion amongst them. Previous researches on this subject are based (so far as I am acquainted with them) on some mathematical artifice or assumption, such as Coulomb’s ... ...
Tập 147 - Trang 9-27 - 1857
VIII. On the surface-condensation of steamThe laws which regulate the transmission of heat through thin plates of metal under various circumstances, although of extensive practical application, and although their elucidation would necessarily involve scientific conclusions of great interest, have hitherto received little of the attention of natural philosophers. Two great divisions of the inquiry are, first, the communication of h... ...
Tập 151 - Trang 133-160 - 1861
XXIII. On the brain of the negro, compared with that of the European and the orang-outangI take the liberty of presenting to the Royal Society a paper on a subject which appears to me to be of great importance in the natural history, anatomy, and physiology of Man; interesting also in a political and legislative point of view. Celebrated naturalists, Camper, Soemmerring, and Cuvier, look upon the Negroes as a race inferior to the European in organization and intellectual power... ...
Tập 126 - Trang 497-527 - 1836
XXXI. On the megatherium (megatherium americanum, blumenbach)Before entering upon the description of the skeleton of the Megatherium, it is requisite to premise some remarks on the vertebrae of the Mammalia in general. Hitherto these parts have been described by means of the terms supplied by Human Anatomy. But the skeleton of Man is one which deviates most from the common archetype: some parts are developed in excess; other parts, which are present... ...
Tập 141 - Trang 719-764 - 1851