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Updated: May 25, 2025
Then suddenly she awoke to the fact that the sermon had begun. "Considered in the world of physics," began the lordly tones of the Reverend Frederick, "dynamics is that branch of mechanics that treats of the effects of forces in producing motion, and of the laws of motion thus produced; sometimes called kinetics, opposed to statics.
Thus, ordinary statics teaches us that a liquid with its vapour on the top forms a system in equilibrium, if we apply to the two fluids a pressure depending on temperature alone. Thermodynamics will furnish us, in addition, with the expression of the heat of vaporization and of, the specific heats of the two saturated fluids.
David Laing, the editor of Knox's Works. SOCIAL STATICS, p. 64, etc. Hallam's CONST. HIST. OF ENGLAND, i. 225, note m.
At the first glance it does not appear the most rational dynamics being more complicated than statics, and precedence being natural to the simpler. It would, in fact, be more philosophical to refer dynamics to statics, as has since been done."
Sundry discoveries are afterwards detailed, showing how completely the development of statics has been achieved by considering its problems dynamically; and before the close of the section M. Comte remarks that "before hydrostatics could be comprehended under statics, it was necessary that the abstract theory of equilibrium should be made so general as to apply directly to fluids as well as solids.
They form part of the more general doctrine of Evolution which he is engaged in working out; and they are at present to be gathered only from scattered passages. It is true that, in his first work, Social Statics, he presented what he then regarded as a tolerably complete view of one division of Morals.
Before he reached the age of seventeen his reading had been immense. He worked with an engineer in the period of the building of the railways in the Midlands. He always retained his interest in inventions. He wrote for the newspapers and magazines and definitely launched upon a literary career. At the age of thirty he published his first book, on Social Statics.
A prospectus is put out, with a list of sciences, we will say, Astronomy, Optics, Hydrostatics, Galvanism, Pneumatics, Statics, Dynamics, Pure Mathematics, Geology, Botany, Physiology, Anatomy, and so forth; but not a word about the mind and its powers, except what is said in explanation of the omission.
A group of physical studies has thus been constituted on what may be called the statics of fluids, in which we examine the relations existing between the pressure, the volume, and the temperature of bodies, and in which are comprised, under the term fluid, gases as well as liquids. These researches deserve attention by their interest and the generality of the results to which they have led.
All mechanical phenomena, may, we must inform Herr Duehring, be reduced to just such simple fundamental forms, and the engineer is still unborn who cannot discover the bridge from statics to dynamics as long as he has sufficient initial force at his disposal. It is quite a hard nut and bitter pill for our metaphysician that motion should find its measure in its opposite rest.
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