: _ INTRCDUCTION ThePREMERA, device was fired May 14, 195 as a barge shot in the crater of the Ivy "Mike" device at Eniwetok Atoll, It represented the Los Alamos Scientific Laboratory's attempt at DLL. At the beginning of the Castle operation the device was to be fired amt south of Yurochi on Bikini Atoll at the same zero position o BGELIILD .Poon e:rly weather celays in the Castle operation led to the suggestion at Eniwetok in order to be able to accept Howaver, by whe time the plan was carried out, weather conditions had changed, aid satisfactory weather conditions alloned firit-~ _ Wee ss UN Some weather that would not be acceptable for fMring at Bikini, bok ingmE Pa ~ # gtate of making ready to fire bred The total energy release was maasured by ball-of-fire xsthods to be whers the uncertainty is dus to having satisfactory pictures The energy release dua to fission aprears to have An oth o dled DELETED ww from only cne position.