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III. An essay on the cohesion of fluids
Tập 95 - Trang 65-87 - 1805
It 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,
either un...
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. &c
Tập 115 - Trang 513-583 - 1825
Dear 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 receive
the a...
IV. On the dynamical theory of gases
Tập 157 - Trang 49-88 - 1867
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 I am not aware
that a...
II. On the stability of loose earth
Tập 147 - Trang 9-27 - 1857
1. 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 “wedge o...
VIII. On the surface-condensation of steam
Tập 151 - Trang 133-160 - 1861
The 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 heat from...
XXIII. On the brain of the negro, compared with that of the European and the orang-outang
Tập 126 - Trang 497-527 - 1836
I 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
powers, havin...
XXXI. On the megatherium (megatherium americanum, blumenbach)
Tập 141 - Trang 719-764 - 1851
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 as
a ge...