az VII. THE TsST PROGRAMS (3) — The status of tne Ivy experimental projects as of ‘the end of June including revisions to tue experiments brought about by knowledge gained during the Tumbler-Snapper Operation is given below: PROGRAM 1 RADIOCHEMISTRY The final specifications of the internal radiochemical detectors to be used by Project 1.2 have been fixed. In general, these detectors are the same as those mentioned in previous installments but vary in dimensions and location. Dr. Harold Plank of Project 1.3 is making arrangements for com= paratively simple back-ups on the air sampling for Mike Shot. He plans to arrange containers which will allow for the collection of radioactive water after the shot if there is difficulty with the airplane sampling. This water sampling would not be by remote control. He also plans to arrange for two bloweretype air samplers, one to be on Bogallua, the other to be on Engebi. The details of tnese collectors are not yet available. N \°/ letter from W. E. Ogle to A. C. Graves, “Recent Cnanges in the Ivy Program", J-12732 dated 10 July 1952 and.Unit Status Reports = May and June 1952. * ~ oh - FY