x c i v A C K N O W L E D G M E N T S
Castagnetti, Max Planck Institute for the History of Science, Berlin; Michael
Eckert, Sommerfeld Edition, Deutsches Museum, Munich; Konstantinos Giapis,
Caltech; Stefanie Grunack, Geheimes Staatsarchiv Preussischer Kulturbesitz, Ber-
lin; Siegfried Grundmann, Berlin; Hanoch Gutfreund, Hebrew University of Jeru-
salem; Claire Guttinger, Collège de France, Paris; Klaus Hentschel, University of
Stuttgart; Herbert Karbach, Politisches Archiv des Auswärtigen Amtes, Berlin;
Waltraud and Miriam Kis, Vienna; Annette Krebs, Bibliothek Exakte Wissenschaf-
ten, Universität Bern; Hans-Josef Küpper, Cologne; Michaela Laichmann, Wiener
Stadt- und Landesarchiv, Vienna; Claudia Lienhard, ETH Library, Zurich; Stefan
Litt, National Library of Israel, Jerusalem; Ad Maas, Museum Boerhaave, Leyden;
Mary Manning and Ryder Kouba, Special Collections, University of Houston Li-
braries; Rachel Misrati, National Library of Israel, Jerusalem; Heleen Pronk, Am-
sterdam; Kerstin Schimmeck, Bundesarchiv, Berlin; Kathleen E. Shoemaker, Man-
uscripts, Archives, & Rare Book Library, Emory University, Atlanta; Robert J.
Schulmann, Bethesda, Md.; Werner Strahalm, Stadtarchiv Graz; Alfredo T. Tol-
masquim, Instituto Brasileiro de Informação em Ciência e Tecnologia, Rio de Ja-
neiro; Yvonne Voegeli, ETH, Bern; Dalila Wallé, Museum Boerhaave, Leyden.
Charlotte Erwin, Judy Goodstein, and Loma Karklins of the Caltech Institute
Archives have been generous in their help with archival documents and rare books.
Intensive work has been carried out at the Einstein Papers Project by talented
and dedicated students. We thank Mara Julseth, Lernik Ohanian, Claus Spenninger,
and Thea Wade.
Our activities and well-being at Caltech have been furthered by the assistance of
Jonathan Katz, Tiffany Kim, Gail Nash, Ed Stolper, Candace Younger, and many
We thank our longtime copy editor, Alice Calaprice, who has freelanced for us
since retiring from Princeton University Press.
Many thanks to everyone at Princeton University Press, especially to Linny
Schenck, Terri O’Prey, and Leslie Flis, our production team; Brigitta van Rhein-
berg; Neil Litt; Adam Fortgang; Martha Camp; and Peter Dougherty, its director.
We dedicate this volume to the memory of Reuven Yaron, notable legal scholar,
who was instrumental in formulating the initial plans for the publication of the Ein-
stein edition and served for many years on its editorial advisory board, and of
Erwin N. Hiebert, distinguished scholar, who for many decades trained and in-
spired generations of historians of science across several continents, and provided
assistance to the editors since the inception of the series.