~weé Preface The signing of the limited test ban treaty in September 1963 pei marked the close of 14 years of atmospheric nuclear weapons testing rea spread over an 18 year period. However, it did not mark the end of a need for further information and interpretation of data concerning the health aspects of nuclear weapons testing. unt This pamphlet is concerned with the health aspects of nuclear weapons testing in the atmosphere. Nothing new is contained herein and much has been omitted for brevity. It is hoped, however, that this pamphlet may in some small way assist in further enlightenment }a — of a complex subject. Gordon M. Dunning U. S. Atomic Energy Commission Washington, D. C.