IT that he had misread the instruments, collected excellent samples. Both the T-33 jet samplers One experiment allowed the aircraft to be pressurized during the cloud penetration, Filtering systems in the air intakes effectively excluded contamination?” At the close of these missions, the T-33 samplers returned to Eglin Air Force Base, JANGLE SUGAR. Because of weather conditions, the JANGLE surface test was postponed on the 15th, then the 16th, 17th, and 18th of November 1951, Finally, on 19 November 1951, the shot fired but since the cloud was not expected to rise very high, only two B-29 samplers were scheduled, One aircraft operated at about 13,000 feet, while the other sampled the dust cloud between 1,000 to 2,000 feet altitude. On the first sampling pass at the lower cloud, the B-29 flew at 2,000 feet and got a reading reflected from the bomb crater, Seven minutes later the aircraft made another pass at 1,000 feet altitude, some five miles from the crater to be certain of a good sample, The samples from both B-29 aircraft were adequate,” JANGEE UNCLE. The underground shot, last of the test series, occurred on 29 November 1951 and the sampling plan was the same as for the surface shot, The cloud rose initially to about 11,000 feet bat drifted down toabout 9,500 feet, The B-29 sampling the upper cloud made seven penetrations to be sure of a usable sample, bat the cloud moved around mountain peaks which complicated results, Meantime, the B-29 taking samples from the dust cloud made four penetrations before a usable sample was obtained. 40 L6 AFWL/HO SWEH-2-003h; 2 ete.