"In Newton's time only two kinds of force were available for quantitative investigation. One was the force of gravity;…"

"However far the phenomena transcend the scope of classical physical explanation, the account of all evidence must be …"

"A law explains a set of observations; a theory explains a set of laws. The quintessential illustration of this jump i…"

"From the thick darkness of the middle ages man's struggling spirit emerged as in new birth; breaking out of the iron …"

"Newton then elevates this approximate empirical discovery to the position of a rigorous principle, the principle of i…"

"... Inertia resists acceleration, but acceleration relative to what? Within the frame of classical mechanics the only…"

"Although many historians of the new millennium now take issue with the notion of a Scientific Revolution, it is gener…"

"I mentally conceive of some moveable [sphere] projected on a horizontal plane, all impediments being put aside. Now i…"

"On the authority of Aristotle... motion in the planetary world was somehow directed by the more perfect motion in hig…"

"Newton's system was for a long time considered as final and the task... seemed simply to be an expansion.... From the…"