862 STROMME | 4 j |] ] BS — "APESOSES NO TEERCT bho OD eeeo Deel Bheha teeK ho —erepgpn o ahhhe Oo hlhe SS Se weetee ao aa | wet et eeeehd Satehhhhkhh ONhh DNShhhhh See eeeth lay 9 710117)92)13414)15 ee BSAahh 7 o EE Bhhhekhkhd WARWRANARASRARANAARALY SAVARRLLABRLSEALERREEERELESEROESR: BY BN BS>hhhhh! ee SNe OCTOBER 1964 Cy et Aehh DAS oO SSSks bhSchaal in BSbhhl ee de SSSbod 300 F- 200 F100 F- aneneremnend SS 400 -- VESLIESEIEPIPSLSITIEPL 700 + Boctoser 1963 w 800 F- marcH 1963] MARCH 1964 ho hte Wes / POTASSIUM 1000 900 - AVERAGE | CASE NO. Fig. 3—Body burdens expressed in picocuries of "Cs per gram of potassium. ratio. This means that the amount of potassium decreased proportionally more than the amountof !*"Cs, It must be pointed out, however, that the increase or the decrease in several cases is only slight. This is at least partly explained by the fact that the boys are of an age when metabolism is rapid and liable to marked individual variations, Table 4 shows the changesin the /°’Cs/potassium ratio. Note that the average ratio rose from 169 in March 1963 to 328 in October 1963, to 344 in March 1964, and then to 385 in October 1964. Figure 4 shows the '*’Cs changes per kilogram of body weight in the time of observation, Note that the three ways of illustrating the 37Cs body burden do not give substantially different results in this figure. Table 5 shows the variation in the average value in picocuries of ICs per kilogram of body weight. This value rose from 344 in March 1963 to 653 in October 1963, to 674 in March 1964, and to 723 in October 1964, Table 6 shows the change in '*’Cs body burden expressed in per- cent. The table shows the average change in each period in the total Table 4—- VARIATION OF "Cs/POTASSIUM RATIO* 131Cs/potassium ratio Date Average March 1963 October 1963 March 1964 169 328 344 October 1964 385 Lowest Highest 121 (2) 267 (23) 209 (12) © 467 (8) 229 (13) — 520 (15) 266 (1) 658 (8) *Numbers in parentheses are case numbers.

Select target paragraph3