Lazare Carnot

"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."

"The rational mechanics of Galileo, Descartes and Newton was not, then, directly applied to machines and is not surprising that parallelly it was maintained a "corpus" of experimental knowledge, more or less formalized, addressed to practical constractors... It will be necessary to wait until the end of the eighteenth century to that Lazare Carnot's sciences of machines could be formally integrated to rational mechanics."