Letter to Dr. Dirac, January 15, 1928

Summary: Letter from N. Bohr to Dr. Dirac discussing his recent work and the possibility of Dirac visiting Copenhagen.

Wolfgang Ernst Friederich Pauli

About a special issue of the journal 'Dialectica' dealing with the concept of complementarity. W. Pauli requests a contribution from N. Bohr.

A letter written to Paul Dirac from A. Das of the Indian Association for the Cultivation of Science regarding a corresponding equation to Professor Dirac's relativistic equation.

P. A. M. Dirac

Summary: Notes on the lecture which Paul A. M. Dirac presented at the University of Cambridge. The lecture discusses the Bohr-Summerfeld theory, the Heisenberg principle, and Dirac's own equation.

Klaus Gottstein

It is shown that, in contrast to many interpretations in the press, the drafts of Bohr's unsent letters to Heisenberg are not contradicting Heisenberg's description of his famous trip in 1941 to Copenhagen, but are complementary to it.

Aage Petersen

In spring of 1956, John Wheeler was in residence at the Lorentz Institute in Leiden, Netherlands. In April, 1956 a copy of the long version of Hugh Everett's thesis was sent to Niels Bohr's Institute; the next month, Wheeler traveled to Copenhagen to discuss the thesis with Bohr and others. This is a letter from Aage Petersen thanking Wheeler for his visit and returning the copy of Everett's thesis that Wheeler had sent to Bohr in April.