- 10 - western coast of South America at Antofagasta, Chile and Lima, Peru. The soil in Brawley was sampled in January of this year and found to contain less than 0.6 mc/mi of Sr99,° In order to realize the Significance of this number, one shguld recall that we would have expected about 13 mc/mi* as an average figure for the U. S. is true that a considerable part of this is from the It Nevada tests—-the depositions of which occur mainly in an easterly direction and might well miss southern Califgrnia——but it certainly seems that at least 8 mc/mi* would have been expected in the Imperial Valley under normal conditions such as prevtiling elsewhere in the United States and in Europe aii Asia. Thus, the observed fallout is not over a few percent of that expected normally. In addition to the soil samples, tests were made on the vegetation grown at Brawley, California, as well. As expected, it was found that the level was lower. Lettuce samples collected from this region at the same time as the soil samples showed 0.0004 MPC; broccoli, 0.00025 MPC; green peas, 0.00134 MPC; alfalfa, 0.0021 MPC. These values all are much lower than for the midwestern U. S. (Shown in Table 2, attached). The rainfall data for Brawley are as follows: In 1955, the rainfall totaled 1.70 inches, 1.3 inches having occurred in January of that year, and 9 months having had no registered rainfall at all. In 1953, the annual total rainfall was only a trace, this trace having occurred in February. \ At Antofagasta, Chile, where it has never been known to rain, except possibly on one occasion, we find 0.02 mc/mi2 of S-20 in January, 1956, when the general deposition fur this latitude was ap- parently a little over 2 mc/mi®. In other words, about 1% of the fallout expected was found and 0.02 is hardly larger than the experimental error of measurement. (more)