Part 12

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.

The Principle of Relativity. Chicago: Open Court Publishing Co., 1913.

COMSTOCK, D. F.

The Principle of Relativity. Science, May 20, 1910, vol. 31, p. 767.

CUNNINGHAM, E.

Einstein’s Relativity Theory of Gravitation. Nature, Dec. 4, 11, and 18, 1919.

An interesting non-mathematical discussion of the latest phases of the theory.

EDDINGTON, A. S.

Einstein’s Theory of Space and Time. Contemporary Review, Dec, 1919.

Good popular article.

EDDINGTON, A. S.

Gravitation. Scientific American Supplement, July 6 and 13, 1918.

An excellent popular explanation by the leading British disciple of Einstein.

EINSTEIN, A.

Time, Space, and Gravitation. Science, Garrison, 1920, Jan. 3, n.s., vol. 51, p. 8-10.

My Theory. Living Age. Boston, 1920, vol. 304, p. 41-3, Jan. 3.

FLAMMARION, CAMILLE.

Lumen. New York: Dodd, Mead and Co., 1897.

Contains nothing about Einstein but presents the relativity of time in fantastic form. KEYSER, C. J.

Concerning the Figure and the Dimensions of the Universe of Space. Science, June 13, 1913.

LODGE, SIR OLIVER.

The New Theory of Gravity. Nineteenth Century, Dec., 1919.