Iron: An Illustrated Weekly Journal for Iron and Steel Manufacturers, Metallurgists, Mine Proprietors, Engineers, Shipbuilders, Scientists, Capitalists ..., Volumen 66

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Knight and Lacey, 1857
 

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Página 294 - That gravity should be innate, inherent and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of anything else by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking can ever fall into it.
Página 420 - ... if we begin with certainties, we shall end in doubts ; but if we begin with doubts, and are patient in them, we shall end in certainties.
Página 393 - The turbine wheel, for example, acts on the principle of reaction, according to Newton's third law of motion that action and reaction are equal and opposite.
Página 249 - ... in two flames, the one on one side, and the other on the other side of the axial line.
Página 318 - I do not resist the search for them, for no one can do harm, but only good, who works with an earnest and truthful spirit in such a direction. But let us not admit the destruction or creation of force without clear and constant proof. Just as the chemist owes all the perfection of his science to his dependence on the certainty of gravitation applied by the balance, so may the physical philosopher expect to find the greatest security and the utmost aid in the principle of the conservation of force....
Página 292 - Supposing that the truth of the principle of the conservation of force is assented to, I come to its uses. No hypothesis should be admitted, nor any assertion of a fact credited, that denies the principle. No view should be inconsistent or incompatible with it. Many of our hypotheses in the present state of science may not comprehend it, and may be unable to suggest its consequences; but none should oppose or contradict it.
Página 420 - Admission to its sanctuary, and to the privileges and feelings of a votary, is only to be gained by one means, — a sound and sufficient knowledge of mathematics, the great instrument of all exact inquiry, without which no man can ever make such advances in this or any other of the higher departments of science, as can entitle him to form an independent opinion on any subject of discussion within their range.
Página 270 - The Lathe and Its Uses," etc. Illustrated. I2mo #1-75 MAIN and BROWN. — Questions on Subjects Connected with the Marine Steam-Engine; And Examination Papers; with Hints for their Solution. By THOMAS J. MAIN, Professor of Mathematics, Royal Naval College, and THOMAS BROWN, Chief Engineer, RN izmo., cloth . $1.50 MAIN and BROWN.
Página 418 - is any cause which alters or tends to alter a body's state of rest or of uniform motion in a straight line...
Página 294 - For my own part, many considerations urge my mind toward the idea of a cause of gravity, which is not resident in the particles of matter merely, but constantly in them, and all space.

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