ACKNOWLEDGMENTS In connéction with the Scientific Task Group’s planuing for and participation in Operation Castle, I wish to acknowledge the over-all directicn and invaluable advice of Alvin C. Graves, J-Division Leader, Los Alamos Scicctifie Laboratory, and Deputy for Scientific Matters, Joint Task Force SEVEN. It would not be possible ir the limited +tir ‘e avalluLls to detercine all of the contributors to this report, It is based largely on data provide 4 by Programs, Projects, Task Units, ard Staff Sections and was assembled by the Task Group staff. The following are contributing authors whose efforts are greatly appreciated: Rodney; L. Aamodt William P. Ball Paul R. Byerly, Jr. Robert H. Campbell Walton L. Carlson John C, Clark Stirling A. Colgate Robert B. Cruise Duncan Curry, Jr. Loris M. Gardner James L. Gaylord Walter D. Gibbins Huntington K, Gilbert Herbert EB. Grier Natharie! C. Ballett Marchall G. Hoilowsy Philip L. Hooper Arthur J. Hudgins Jack G. James Armard W. Kelly Walters T. Karin, dr, Neil E. Kingste; John W. Lipp Edward A. Martell Buford A. Mansum Byron G. MecNahb Richard J. Pitzer Donald I. Prickzi Owen A. Roberts John D. Servis Jamie L. Shumway Ralph Carlisle Smith Kenneth Street, Jr. Rebast J. VanGemert Jacob J, Wachsier Robert S. White Paul R. Wignall VW One W. E. OGLE Commander, TG 7.1