3. The shifting of spectral lines toward the red end of the spectrum in the case of light coming to us from stars of appreciable mass (not yet confirmed). The great attraction of the theory is its logical consistency. If any deduction from it should prove untenable, it must be given up. A modification of it seems impossible without destruction of the whole. No one must think that Newton’s great creation can be overthrown in any real sense by this or by any other theory. His clear and wide ideas will forever retain their significance as the foundation on which our modern conceptions of physics have been built. A final comment. The description of me and my circumstances in _The Times_ shows an amusing feat of imagination on the part of the writer. By an application of the theory of relativity to the taste of readers, today in Germany I am called a German man of science, and in England I am represented as a Swiss Jew. If I come to be regarded as a _bête noire_, the descriptions will be reversed, and I shall become a Swiss Jew for the Germans and a German man of science for the English! FOOTNOTES: [Footnote 1: Bergson: “Time and Free Will,” p. 221.] [Footnote 2: Bergson in his “Laughter” traces all humor back to this fundamental absurdity of making a man act mechanically.] [Footnote 3: “We can thus say that all these paradoxical phenomena (or rather negations of phenomena) which have been enumerated above can only happen after the end or before the beginning of eternity” (De Sitter).] [Footnote 4: If you insist upon seeing just what is the difference between Einstein’s and Newton’s laws of gravitation here it is as given in _The Scientific Monthly_ of January, 1920: Any particle or light pulse moves so that the integral of _ds_ between the two points of its path (in four dimensions) is stationary where (according to Einstein) _ds^{2}_ = -(1 - 2_m_/_r_)^{-1}_dr^{2}_-_r^{2}_ _d θ^{2}_ + (1 - 2_m_/_r_)_dt_ or (according to Newton) _ds^{2}_ = _dr^{2}_ - _r^{2}_ _d θ^{2}_ + (1 - 2_m_/_r_)_dt_ These expressions are in polar coördinates for a particle of gravitational mass _m_. The new factor introduced by Einstein is, as shown above, 1/{1-(2_m_/_r_)} ] [Footnote 5: _Nineteenth Century_, December, 1919.] [Footnote 6: Quoted by Eddington in _Contemporary Review_, December, 1919.] [Footnote 7: Sir Joseph Thomson in _Nature_, December 4, 1919.] And finally IF YOU WANT TO READ MORE ABOUT THE EINSTEIN THEORIES _For the non-mathematical reader_: ABBOTT, EDWIN. Flatland, by A Square. Boston, 1891. An amusing way of leading up to the fourth dimension. CAMPBELL, NORMAN. The Commonsense of Relativity. _Philosophical Magazine_, April, 1911. CARR, WILDON. The Metaphysical Implications of the Theory of Relativity. _Philosophical Review_, Jan., 1915. CARUS, PAUL.