On the Extension of Thermodynamics to General Relativity.

8 Cf. Millikan, R. A., The Electron: Its Isolation and Measurement and the Determination of Some of Its Properties, Chicago, University of Chicago Press, 1917, 260 pp. 9 We may cite the recent experiments of Davisson, C., and Germer, L. H., "On the Diffraction of Cathode-Rays by Crystals," Physic. Rev., 30 (1927), pp. 705-741. Equally relevant is the work of F. Kirchner, on the "Compton Effect as Manifested by Individual Electrons," Ann. Physik, 83 (1927), pp. 969-76. 10 Cf. Bohr, N., Kramers, H. A., und Slater, J. C., "Uber die Quantentheorie der Strahlung," Zs. Physik, 24 (1924), pp. 69-88. Here a theory of the relation of light quanta to light waves is developed which invites comparison with that developed in the present paper. 1' Struik, D. J., and Wiener, N., "A Relativistic Theory of Quanta," J. Math. Phys. Mass. Inst. Tech., 7 (1927-28), pp. 1-23. 12 For a discussion of the constaivcy of yoo, see Einstein, A., "Zu Kaluzas Theorie des Zusammenhanges von Gravitation und Elektrizitat," Sitzungsber. Berlin Akad., 1927. Erste Mitteilung, pp. 23-25, 26-30.