DOCUMENT 467 AUGUST 1913 549 ALS (NeHR, Archief H. A. Lorentz). [16 432]. There is a perforation for a loose-leaf binder at the head of the document. The year is provided by the reference to the Berlin appointment. As member of the Prussian Academy of Sciences, to which he was elected two weeks ear- lier (see Doc. 455, note 6). Citing a source in Zurich, a Berlin newspaper announced at the be- ginning of August that Einstein would succeed Jacobus van 't Hoff, though no institutional af- filiation for the appointment is given (see Vossische Zeitung [1 August 1913], no. 386, 2. Beilage, p. ). Max von Laue. His father had received a patent of hereditary nobility in June 1913 (see Max von Laue to Erziehungsdirektor, Canton of Zurich, 30 June 1913, SzZSa U 110 b .2 (50)). W. H. Keesom. Von Laue had assumed the position of Extraordinary Professor of Theoretical Physics at the University of Zurich thirteen months earlier (see Doc. 398). More than a year and a half earlier Einstein had expressed a less favorable judgment on Keesom's abilities as a theoretician (see Doc. 327). Due to the fact that Einstein had incurred the displeasure of Alfred Kleiner of the Uni- versity of Zurich on at least two occasions (see Doc. 369, note 6). Wander Johannes de Haas (1878-1960) was married to Lorentz's elder daughter, Geer- truida Luberta. He was Assistent to Henri du Bois (1863-1918), Professor of Applied Physics at the University of Berlin. A month earlier Einstein had presumably discussed the question of a Kaiser Wilhelm In- stitute of Physics under his direction with Max Planck and Walther Nernst (see Docs. 451 and 478). For background on a variety of proposals stressing the priority of creating a physics insti- tute with an experimental character within the framework of a Prussian royal society for the advancement of the sciences (Kaiser Wilhelm Society), see Vierhaus and vom Brocke 1990, pp. 120-140. The view of Friedrich Schmidt(-Ott) of the Prussian Ministry of Education in late 1912 that a theoretical physics institute was "unnecessary" ("entbehrlich") (see Doc. 428) may help to explain why plans to develop such an institute were allowed to languish. A new initia- tive in this regard and its fate are discussed in Docs. 509, note 5, and 513, note 6. For Leopold Koppel's commitment to support half of Einstein's salary in early June, see Doc. 445, note 2. A month later the appropriations committee (Geldverwendungsausschuß) of the physical- mathematical class recommended to the class that Einstein's salary be fixed at 12,000 marks and that Koppel's contribution take the form of a donation to the Prussian Academy (see the minutes of the meeting of the appropriations committee, 3 July 1913, GyBAW, II-XVII, Vol. 15). The matter of salary was further discussed in plenary session a week later, on which occasion Walther Nernst and Max Planck emphasized the independence of the motives for Ein- stein's call from the procurement of funds (see the minutes of the meeting of the plenum, 10 July 1913, GyBAW, II-V, Vol. 89, item 10). At the end of July the general appropriations committee (Gesammtgeldverwendungsaus- schuß) deliberated on and agreed to guarantee Einstein's salary should he be elected (see the minutes of the meeting of this committee, 24 July 1913, GyBAW, II-XVII, Vol. 12), and the matter of Einstein's salary, survivor benefits, and moving costs was referred to the Finance Ministry by the Education Minister at the end of August (see Friedrich Schmidt, i.A., to Fi- nanzminister, 21 August 1913, GyMerSa, Rep. 76 Vc, Sekt. 2, Tit. 23, Litt. F, Nr. 2, Vol. 14, pp. 81-82). Pierre Weiss. Einstein and Grossmann 1913 (Vol. 4, Doc. 13). See also Vol. 4, the editorial note, "Ein- stein on Gravitation and Relativity: The Collaboration with Marcel Grossmann," for a discus- sion of this paper. The equations for the gravitational field, as derived in Einstein and Grossmann 1913 (Vol. 4, Doc. 13).