CONTRIBUTORS The Hebrew University of Jerusalem and Princeton University Press wish to express their appreciation to the Contributors for their generous financial support of the editorial work that has made this edition of The Collected Papers of Albert Einstein possible. ENDOWMENT Harold W. McGraw, Jr. INSTITUTIONAL CONTRIBUTORS The National Science Foundation (U.S.A.) The Alfred P. Sloan Foundation (U.S.A.) The National Endowment for the Humanities (U.S.A.) The Swiss National Science Foundation The Dr. Tomalla Foundation, Vaduz, Liechtenstein The Canton of Aargau, Switzerland INDIVIDUAL CONTRIBUTORS The Estate of Louise R. Berman The Estate of Albert Einstein Robert A. Hefner III The Estate of William H. Schwartz