-58- amount of radioactivity in the sample to the allowable amount was calculated. the samples were selected from collections that were made in the Bikini-Eniwetok area during or a few weeks after a test series and at a time when the levels of radioactivity in the environment were at a maximum (Table v). The allowable daily intake was calculated from the value for (MPC),, in Handbook 69. The ratio of the amount of radioactivity from each isotope in the sample to the allowable amount for that isotope was calculated; the value for the sample was the sum of the values for the individual isotopes. The values given in Handbook 69 are for various tissues and for occupational exposures of either 40 or 168 hours per week. In this and following calculations the values for the most sensitive tissue and for the 168-hour exposure have been used. Often a value of 1/10 that for the occupational expesure is used in the case of the population at large. The results of the calculations are presented in Table VI. For "total" values less than one -- flying-fish muscle, flying- fish liver, bonito liver -- the radioactivity in the sample is less than the maximum permissible amount as determined by the National Committee on Radiation Protection. a value greater than one, For the clam kidney, the result is interpreted as meaning that it would not be safe to eat 22 grams of clam kidney with this amount of radioactivity every day for 50 years. However, the interpretation is not realistic because it is assumed in the calculations that there is a constant level of radioactivity,