Statement of the problem
Administrative history up to December 1941
Progress up to December 1941
Administrative history, 1942-1945
The metallurgical project at Chicago in 1942
The plutonium production problem as of February 1943
The plutonium problem, January 1943 to June 1945
General discussion of the separation of isotopes
The separation of the uranium isotopes by gaseous diffusion
Electromagnetic separation of uranium isotopes
The work on the atomic bomb
General summary.