Werner Heisenberg

Dr. Robert J. Oppenheimer
Director of Above

Dear Sir,

First, please let me apologize for my manner of speaking when we discussed quantum theory recently. This manner is unjustifiably aggressive.

In the two years I spent at the Institute, 1957–59, I had the opportunity of meeting two of the founders of the quantum theory—Niels Bohr and Paul Dirac. In the case of Bohr, perhaps “meeting” overstates the case. He was a Mem­ber in the spring...