The editors have benefited greatly from the assistance of many individuals and
institutions. We extend our thanks to the members of the Editorial Advisory Board
and the Executive Committee, and wish to thank The Hebrew University of
Jerusalem for granting us permission to publish materials from its holdings.
The ongoing support of Harold McGraw, Jr., is deeply appreciated. Generous
assistance, new facilities, and a warm environment were provided by the California
Institute of Technology and by its Virgle L. Hedgcoth and Susan Alexander Fund.
The Swiss Federal Institute of Technology in Zurich and the Swiss National
Science Foundation have graciously continued their long-standing support; we are
particularly grateful to Walter Hunziker, long-time member of the executive com-
mittee. We also thank Mrs. Lynda Hughes for her generous gift.
We thank Ze’ev Rosenkranz (former Bern Dibner Curator) and Barbara Wolff,
Chaya Becker, and the late Dina Carter of the Albert Einstein Archives of the
Jewish National and University Library at The Hebrew University in Jerusalem for
their sustained assistance and generous cooperation.
A debt of gratitude is owed to Giuseppe Castagnetti of the Max Planck Institute
for the History of Science, Berlin, who has continued to make available a substan-
tial amount of German archival and historical material and has helped in its evalu-
ation. We also owe him belated thanks for his many contributions to Volume 7.
Issachar Unna, The Hebrew University in Jerusalem, Martin J. Klein, Yale Uni-
versity and former general editor, and Fritz Stern, Columbia University, have pro-
vided invaluable expertise in carefully reading and evaluating the manuscript.
We are grateful to Rudolf Mumenthaler, Yvonne Vögeli, Sybille Franks, and
Flavia Lanini of the Swiss Federal Institute of Technology’s library, and to Gian
Andrea Nogler and Hanspeter Stucki of the University of Zurich Archives, without
whose assistance much of the documentation from Switzerland could not have
been assembled. Heinrich Wanner, representing the Heinrich Zangger Erbenge-
meinschaft of Zurich, was kind enough to give us access to his grandfather’s
Nachlass deposited in the Special Collections at the Central Library of Zurich.
Christoph Eggenberger, the director of Special Collections there, and his col-
leagues Ruth Haeusler, Angelika Hugger, and Gabriele Wohlgemuth were more
than helpful.
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