RECOMMENDATIONS FOR FUTURE STUDY 1. Studies in the five pastures should be continued. An ad@itional pasture or two having intermediate values of soil calcium sh@uld be included in these studies. 2. In order to provide information on uptake rates after a feriod of several years, the “pasture approach" should be used in Hiroghi Nagasaki selecting areas within the localities in which relatlively heavy fallout is known to have occurred. (This was included in our original program and Dr. Harley is planning to visit Japan for this purpose in February). 3. 4, The program of atmospheric sampling should be expanded: a. Balloon ascents to the stratosphere should be conducted on a weekly schedule during CASTLE and for about 1 year théreafter. b. The feasibility of obtaining dust samples from rocketd fired into the upper atmosphere should be explored. c. Samples of the filters from aircraft angaged in daily Eintel- d. The filter equipped aircragt assignedto Eniwetok should|be used ligence flights should be made available to the Atomic] Energy Commission. te collect samples in that region prior to CASTLE. The milk and water supplies from 2 or 3 selected communitids in the United States should be analyzed weekly for Sr90, This data sHould bs correlated with periodic pooled samples of urine and bene. S. The world-wide monitor network should continue intact for least a year following CASTLE. Collection should be on a weekly rathbr than daily basis beginning about 30 days after conclusion of the opefation. 6, The tumor producing burden of Sr70 in livestock should be determined. 7. Better measurements than are now available should be made o¥ long lived alpha activities of bomb debris. ~ kl -k2- the