Both historical treatment and critical analysis, this work by a
noted physicist takes a fascinating look at a fundamental of
physics, tracing its development from ancient to modern times.
Kepler's initiation of scientific conceptualization, Newton's
definition, post-Newtonian reinterpretation — contrasting
concepts of Leibniz, Boscovich, Kant with those of Mach,
Kirchhoff, Hertz. "An excellent presentation." — Science.