[3] "In the Days of the Comet", by H. G. Wells. New York: The Century Company.
[4] The World Set Free.
[5] From Wells's "Anticipations."
[6] From Kellermann's account of the Battle of Loos.
[7] It would be interesting to learn where Wells happened to get hold of the idea that time is the fourth dimension of reality and how much he knew then of the history of the conception. He could not, at any rate, for all his prophetic powers, have foreseen the important part it was to play in scientific thought and metaphysical speculation in the coming century. Lorentz, Einstein and Minkowski have incorporated it into their new theory of relativity which threatens to abolish the ether and to make mass a variable, dependent on velocity. Our ordinary Euclidean or three dimensional space would thus be a cross-section at a certain time. (See "The Time-Space Manifold of Relativity", by Edwin B. Wilson and G. N. Lewis, in Proceedings of the American Academy of Arts and Sciences, November, 1912.) Heinrich Czolbe in 1875 brought forward the theory (see Müller, Archiv für systematische Philosophie, XVII, p. 106), and Lotze discusses it in his "Microcosmos." Bergson's philosophy is based upon the distinction he draws between psychological duration and the physical treatment of time as a kind of space. Professor Pitkin of Columbia criticizes Wells's time-machine from the metaphysical standpoint in "Time and Pure Activity" (Journal Philosophy, Psychology and Scientific Methods, Vol. ii, No. 19).
[8] "Boon, The Mind of the Race, The Wild Asses of the Devil, and The Last Trump. Being a First Selection from the Literary Remains of George Boon, Appropriate to the Times. Prepared for Publication by Reginald Bliss, with an Ambiguous Introduction by H. G. Wells." (Doran, 1915.)
[9] He has given three statements of his views on this point: First, in an article, "Rediscovery of the Unique", in Fortnightly Review, July, 1891; second, in a paper read to the Oxford Philosophical Society and published in Mind, XIII, No. 51, and as an appendix to "A Modern Utopia"; and, third, in Book I of "First and Last Things."
[10] "Logic, M. Bergson and Mr. H. G. Wells", by Philip E. B. Jourdain in Hibbert Journal, X, p. 835.
[11] "Marriage," Duffield and Company, 1912.
[12] See "The Tragedy of Color", chapter xii of "The Future in America", and his article on "Race Prejudice", in The Independent of February 14, 1907.