The small percentage of total debris accounted for by the observing network is somewhat puzzling. Although it must be assumed that a large fraction of the active debris was deposited in the vicinity of the test site, it is also true that the shor tcomings of the gummed film technique, which have been discussed in previous reports, may be responsible for the effect noted. 3. METEOROLOGICAL INTERPRETATION The total fallout from the Bravo test (Figures 3.3 and 3.h) clearly show the tendency for the major activity to remain near the source latitude, tnere seems to be no evidence that debris was carried northward around the western side of the Pacific high-pressure cell. Almost no fallout occurred in Japan, and very little on Iwo Jima from the Bravo test, The difference between the two tests is a resultof the seasonal difference in the location and intensity of the western cell of the Pacific high. This cell is almost non-existent, in the mean, during the winter and took ee an -33-