UNCLASSIFIED SECRET eee E. With these general conclusions in mind we may discuss the 1. bearing on: Future Tests It would seem from the results now available that a Jimited number of future tests of about the Castle scale would be peymissible, and that continuing efforts to determine the distrjbution of sr?° are not likely to upset this conclusion. It geems necessary, however, to make one exception; namely, the testsfof jarge weapons are likely to lead to local fall-out of apprecjable fraction of the fission products produced and should be most carefully examined from the point of view of the SUNSHINE PR@JECT. Additionally, there should be the most minute and detailed examination of any tests of the deep underwater or deep undegground varfety involving either thermonuclear or large scale fission weapons. 2. Warfare The only comment on this point that the conference made 5 that civilian defense ageinst or might be accomplished by ha simple device as the use of a calcium-rich diet. e The confe therefore strongly suggests that the Division of Biology and Medicine institute studies of the palliative effects of the addition soluble calcium to the diet. For example, the effect of ac such as caicium glutonate on the Sr” 90 uptake. und In other wo by the use of Sr°? to avoid hazards to the individual a study might be made on humans of the rate at which sro? in the diet is assimilated normally and then in the case of a SECRET = . UNCLASSIFIED A at lL. AAIN ra 1045305