282. “Appendix: ‘Eddington’s Theory and Hamilton’s Principle’” “Anhang. Eddingtons Theorie und Hamiltonsches Prinzip” [Einstein 1925a] Completed before 7 July 1924 Published 1925 In: A. S. Eddington, Relativitätstheorie in mathematischer Behandlung. Berlin: Springer, 1925, pp. 367–391.