(*) It is a pleasure to thank Professor Aage Bohr, the Caltech Archives, Mrs. Franca Pauli, and Sir Rudolf Peierls for permission to quote from BSC, DP, PIC, and PP, respectively. I am also obliged to Eric Rudinger, Bruce R. Wheaton and M. Norton Wise for comments on the final draft. Дев. Hist. Set, 1985, XXXVIII/3-4