Hendrik Lorentz

“Publications of H.A. Lorentz @Lorentz Institute for Theoretical Physics”

“H.A. Lorentz, The Einstein Theory of Relativity: A Concise Statement (1920)”

“H.A. Lorentz, The Theory of Electrons and Its Applications to the Phenomena of Light and Radiant Heat (1916)”

“A. D'Abro, The Evolution of Scientific Thought from Newton to Einstein (1927) @archive.org”

“Theory of relativity”

“The classical or Galilean transformations were x' = x - vt, y' = y, z' = z, t' = t, where v was the velocity of the frame with respect to a frame at rest in the ether, hence with respect to the ether itself; this velocity being directed along the x axis and the two frames being assumed to have coincided at the initial instant t = 0. Under the same conditions the Lorentz transformations were x' = \beta(x - vt), y' = y, z' = z; t' = \beta(t - \frac{vx}{c^2})  where  \beta = \frac{1}{ \sqrt{1 - \frac{v^2}{c^2}}}”

“It may well be said that Lorentz was regarded by all theoretical physicists as the world's leading spirit, who completed what was left unfinished by his predecessors and prepared the ground for the fruitful reception of the new ideas based on the quantum theory.”

“Lorentz made an important addition to his original theory. He introduced changes in time. Clocks, he said, would be slowed down by the ether wind, and in just such a way as to make the velocity of light always measure 299,800 meters per second.”

“Let there be in every material particle several material points charged with electricity, of which, however, only one be movable, and have the charge e and the mass μ.”

“Briefly, everything occurs as if the Earth were at rest.”