PREFACE This report comprises e handbook which was intended to be used by technical representatives from the United Nations Scientific Committee on the Effects of Atomic Radiation during a demonstration of a low fission to fusion yield explosion at the Eniwetok Proving Grounds. The handbook includes the operational concept and detailed technical descriptions of the methods of measurement which were to be used to determine the total energy release and the fission energy release. The total energy release was to be measured by rate of fireball growth measurements , and is described in the section entitled Fireball Determination of Total Yield@ prepared by Dr. Lewis Fussell of Edgerton, Germeshausen and Grier, Inc. ‘The fission yield was to pe determined by s radiochefical methud and is described in Chapter III prepared by Dr. Roger Batzel of the University of California Radiation Leboratory. This demonstration shot, designated Pinon, wes cancelled on July 26, 1958. However, because the techniques described here had not been published previously it was considered desirable to publish the handbook. GERALD W. JOHNSON Technicel Director