262 RELATIVITY, THE GENERAL THEORYE7a. , letter to C. Seelig, May 5, 1952.
E8. —, letter to P. Ehrenfest, April 10, 1914.
E9. , letter to H. Zangger, July 7, 1915.
E10. , Die Vossische Zeitung, April 26, 1914.
Ell. —•— in Kultur der Gegenwart (E. Lecher, Ed.), Vol. 3. Teubner, Leipzig, 1915.
E12. , PAW, 1914, p. 739.
E13. , letter to H. Zangger, July 7, 1915.
E14. ——, letter to H. Zangger, undated, probably spring 1915.
E15. , letter to H. A. Lorentz, December 18, 1917.
E16. , PAW, 1914, p. 1030.
E17. — and M. Grossmann, Z. Math. Phys. 62, 225 (1913).
£18. , [E16], p. 1046, Eq. 23b.
E19. , [E16], p. 1083, the second of Eqs. 88.
E20. , [E16], p. 1084.
E21. , [E16], p. 1085.
E22. , [E16], p. 1066.
E23. and M. Grossmann, Z. Math. Phys. 63, 215 (1915).
E24. , [E16], pp. 1075, 1076, especially Eq. 78.
E25. , letter to H. A. Lorentz, January 1, 1916.
E26. , letter to T. Levi-Civita, April 14, 1915.
E27. , letter to P. Straneo, January 7, 1915.
E28. ,/MW, 1915, p. 315.
E29. in Kultur der Gegenwart (E. Lecher, Ed.), Vol. 3. Teubner, Leipzig, 1915.
E30. , AdP47, 879 (1915).
E31. , letter to M. Besso, February 12, 1915; EB, p. 57.
E32. , Naturw. 3, 237 (1915).
E33. and W. de Haas, Verh. Deutsch. Phys. Ges. 17, 152 (1915); correction, 17,
203 (1915).
E34. and W. de Haas, Versl. K. Ak. Amsterdam 23, 1449 (1915).
E35. and W. de Haas, Proc. K. Ak. Amsterdam 18, 696 (1915).
E36. and O. Stern, AdP 40, 551 (1913).
E37. , Verh. Deutsch. Phys. Ges. 18, 173 (1916).
E38. , letter to H. Zangger, July 7, 1915.
E39. , letter to A. Sommerfeld, July 15, 1915. Reprinted in Einstein/Sommerfeld
Briefwechsel (A. Hermann, Ed.), p. 30. Schwabe, Stuttgart, 1968.
E40. , letter to D. Hilbert, November 7, 1915.
E41. —, letter to H. A. Lorentz, October 12, 1915.
E42. , letter to A. Sommerfeld, November 28, 1915. Reprinted in Einstein/Som-
merfeld Briefwechsel, p. 32.
E43. , letter to P. Ehrenfest, December 26, 1915.
E44. , PAW, 1915, p. 778.
E45. , [E44], Eq. 5a.
E46. , PAW, 1915, p. 799.
E47. , letter to D. Hilbert, November 12, 1915.
E48. , PAW, 1915, p. 831.
E49. , letter to P. Ehrenfest, January 17, 1916.
E49a. , Science 69, 248 (1929).