measured in kilo electron volts, or kev. On Rongelap there were found three major “energy regions," of 100, 700, and 1500 kev. That is, within the Fallout on the ground there were particles which were being emitted in these three general regions (levels) of strength. Fallout Samples A third source of information upon which would be based whole-body doses, was actual fallout material. By studying the radioactive calcium oxide (incinerated coral) scientists determined the mixture of different radioactive elements and their energies. However, it is interesting to note that the doses calculated for all the exposed persons, according to the 1956 report by the AEC, ''came from fallout samples taken soon after the detonation at points some distance from the contaminated atolls.’ (p.6) Why the samples were not collected from the islands on which the people were exposed was not explained. One of the important factors in calculating the amount of radiation exposure is the length of could be estimated was estimates of time of The only way this and personal eyewitness time. fallout was about information, itself. from the reading on Rongerik, Based on the early and period of the fallout it appeared later readings at Rongerik, 16 hours, or, a long fallout. However, including reports of persons who saw the fallout, it was shorter than 16 hours and that it ended early. A long that the other indicated that fallout also it was concluded that whether conflicted with readings taken later. Finally, or not the fallout was long, or short, the result would be nearly the same, since in a short length of time as fallout, the heavier material would descend during the same it would during a long fallout. 95 [O14 102 tn other words, the heavrest