Part 18

The equations of the theory of electrons in a gravitation field of Einstein deduced from a variation principle. Koninklijke Akademie van Wetenschappen. Proceedings, Amsterdam, 1917, Band 19, pp. 892-896.

TUNZELMAN, G. W. DE.

Relativity Theory. Science Progress, 1919, vol. 13.

WEYL, H.

Eine neue Erweiterung der Relativitätstheorie. Annalen der Physik, 1919, vol. 59, pp. 100-123.

Raum, Zeit, Materie. Springer. 1918.

Zur Gravitätionstheorie. Annalen der Physik, 1917, vol. 54, pp. 117-145.

WILSON, EDWIN BIDWELL.

Generalized coördinates, relativity, and gravitation. Astrophysical Journal, Chicago, 1917, vol. 45, pp. 244-253.

WILSON, WILLIAM.

Relativity and gravitation. Physical Society of London. Proceedings, London, 1919, vol. 31, pp. 69-77.

WILSON and LEWIS.

The Time-Space Manifold. Proceedings of the American Academy of Arts and Sciences, Nov., 1912, vol. 48, pp. 389-506.

THANKS

Most of the mathematical references cited above have been borrowed bodily from the book list prepared by Miss Mary E. Todd of the Science Room of the New York Public Library and published in the Library Journal. As soon as the Einstein craze struck New York these books were placed on a long table and it has been difficult to find a seat at this table, day or evening, ever since. At Cambridge University when Professor Eddington lectured on the Einstein theory the students waiting for the opening of the hall doors formed a cue extending half-way across Trinity Great Court. It is unusual in any university to have “standing room only” at a lecture on mathematical physics.

About half of the present volume appeared in The Independent of November 29, December 7, 13, and 20, 1919, and I am indebted to Hamilton Holt, the editor, and to Karl V. S. Howland, the publisher of that magazine, for the privilege of reprinting them in book form. I am further grateful to several professors of physics, mathematics, astronomy and philosophy who have been kind enough to criticize and correct this material, but since it would not be fair to hold them responsible for my personal views and unconventional language I shall have to express my thanks to them in private.

INDEX

Bergson, Henri, 47, 51, 52

Carlyle, iv

Curvature of space, 26, 35, 38, 96

Eclipse observations, 2, 65, 72

Einstein, Albert Postulates of, 13, 83, 111 Theory of time, 109 Theory of gravitation, 39, 58, 76, 80, 86, 93, 96, 109 Life of, 78 Works of, 116, 117

Equivalence, principle of, 14, 83, 86

Ether, 8, 11, 88, 106

Flammarion, Camille, 40

Flatland, 35, 57

Fourth dimension, 24, 34, 49

Gravitation, 68, 74, 77, 80, 86, 90