"Within a certain kind of environment, an activity may be checked so that the only meaning which accrues is of its dir…"

"To the art of mechanics is owing all sorts of instruments to work with, all engines of war, ships, bridges, mills, cu…"

"I think I can safely say that nobody understands quantum mechanics."

"[T]he mere fact that a quantitative majority of causations are of vitalistic type, does not in the least mean that sc…"

"The work before us is a proof that the doctrine of mechanics is of the utmost importance to mankind in general, and t…"

"The laws of motion of visible and tangible, or molar, matter had been worked out to a great degree of refinement and …"

"[J]eder Fortschritt in der Theorie der partiellen Differentialgleichungen auch einen Fortschritt in der Mechanik herb…"

"Another conspicuous failure of classical mechanics was with one aspect of the problem of radiation. ...Imagine a crow…"

"The need for a fundamentally different approach to the study of physical processes at the molecular level motivated t…"

"People get a lot of confusion, because they keep trying to think of quantum mechanics as classical mechanics."