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The fundamental doctrines of motion have [herein]... been more immediately referred to axioms simply mathematical than has hitherto been usual; and the application of these doctrines to practical purposes has [herein]... been facilitated.

— Thomas Young A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)

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When I was a boy, I thought myself a man. Now that I am a man, I find myself a boy.

The historical part of the work can scarcely be called new, but several of the circumstances, which are related, have escaped the notice of former writers on the history of the sciences.

A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)

With respect to the mathematical part of optics, the curvature of the images, formed by lenses and mirrors, has been correctly investigated, and the inaccuracy of some former estimations has been demonstrated.

A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)

The theory of the tides has been reduced into an extremely simple form, which appears to agree better with all the phenomena, than the more intricate calculations which they have commonly been supposed to require.

A Course of Lectures on Natural Philosophy and the Mechanical Arts (1807)

A permanent alteration of form limits the strength of materials with regard to practical purposes, almost as much as fracture; since, in general, the force which is capable of producing this effect is sufficient, with a small addition, to increase it till fracture takes place.

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