The Problem The previous conference of this society dealt with the concept of tolerance levels in industrial activities. Today's conference has shown the importance of this concept in a new industry-that of atomic energy. The industry has an unfortunate history arising from its war-like introduction at Nagasaki and Hiroshima, and this has led to a considerable amount of confused thinking. Whene...

12.1. The entire purpose of the work described in the preceding chapters was to explore the possibility of creating atomic bombs and to produce the concentrated fissionable materials which would be required in such bombs. In the present chapter, the last stage of the work will be described the development at Los Alamos of the atomic bomb itself. As in other parts of the project, there are two p...