Leiden Activities

  • Jan GuichelaarEmail author
Part of the Springer Biographies book series (SPRINGERBIOGS)


In a combined meeting of the Board of Governors and the Senate (The Senate (Dutch: Senaat) executed the daily management of the University and consisted of all professors, chaired by the Rector Magnificus, who was chosen yearly.) De Sitter took the oath as a professor on 21 October 1908. Directly after the oath he delivered his inaugural lecture: The New Methods in the Mechanics of Celestial Bodies [AUL, BG minutes] (De Sitter 1908). In a rough draft the title was The New Methods in the Mathematical Theory of the Movements of the Planets [ASL, Studies S8].


  1. De Sitter, W. (1908). The New Methods in the Mechanics of Celestial Bodies (Dutch: De Nieuwe Methoden in de Mechanica der Hemellichamen), inaugural lecture, Gebroeders Hoitsema, Groningen, 1908.Google Scholar
  2. De Sitter, W., C. de Jong, editor (1914). Introduction to the Method of the Least Squares, according to the lectures given at the University of Leiden by Dr. W. de Sitter, at the request of the Philosophical Faculty of the Leiden Students (Dutch: Inleiding tot de Methode der Kleinste Kwadraten etc.), Boekhandel en Drukkerij, voorheen E.J. Brill, Leiden, 1914.Google Scholar
  3. Kox, A.J. (1988). ‘General Relativity in the Netherlands 1915–1920’; in: Eisenstaedt, J. and Kox, A.J. (editors), Studies in the History of General Relativity, pp. 39–56, 1988.Google Scholar
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  6. Van de Sande Bakhuyzen, E.F. (1909). The Meaning the Older Measurements still have for the Astronomy Nowadays (Dutch: De Beteekenis die de Oudere Waarnemingen nog Heden voor de Sterrenkunde hebben), inaugural lecture, Boekhandel en Drukkerij voorheen E.H. Brill, Leiden, 1909.Google Scholar

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Authors and Affiliations

  1. 1.AmsterdamThe Netherlands

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