“As result a new kind of theory to be applied on a class of motions … these geometric motions are that which acquire different parts of a system of bodies, without neither perturb themselves nor the other and consequently these motions do not depend of the action or reaction among the bodies, but only upon the conditions of their connections, and thus being determined only by geometry and not dependent of the rules of dynamics.”

On geomatric motion. A History of the Work Concept: From Physics to Economics, by Agamenon Oliveira, p. 154.

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Lazare Carnot 1
French political, engineering and mathematical figure 1753–1823

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“Heat can evidently be a cause of motion only by virtue of the changes of volume or of form which it produces in bodies.”

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“After so many great men have worked on this subject, I almost do not dare to say that I have discovered the universal principle upon which all these laws are based, a principle that covers both elastic and inelastic collisions and describes the motion and equilibrium of all material bodies.
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