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Published online by Cambridge University Press: 03 November 2016
Page 175 of note * For English translations of this and other original papers see:
The Principle of Relativity. Translated by M. N. Saha and S. N. Bose. 10s. 1920. (Calcutta University Press.)
or The Principle of Relativity. Translated by G. B. Jeffery and W. Perrett. 10s. 6d. 1922. (Methuen.)
Page 175 of note † This refers only to a tensor which like the moment of a force, is skew-symmetrical; the general four-dimensional tensor of the second rank has sixteen (=42) components.