into that gless using this measure of untae as a moasure of the normalcy of the gland, out the thyroid gland, 35. You will see the 1000 simply pune ed Astually, it voturned to normal within IY showle not really say normal because it re:turned to cero | uptake, Libkewise, 240 micrecurios within a very short time -- the thyroid was simply busened eut by this cauterizing effect of the I-131 ccosase, To mot right on with it hero, briefly, we had a rathor larse peak initially in all of tho curves ait the Hanford envivroa- ment, With respsct ta the fFolinse, there is en icdine deiticicney. It was not initially reccscnized, so, on a golivemenic dict, these aninals abserped more icdine than if there had been a sufficient “supply of icdine in the fisld. Fron this point’ on, thore was a supplementation Which brousgat thom up, as you will see here (Slide) This pink ono here -- this 5 niericurie per day level looked protty reasenabl2, but then tais tine the uptake fell off very markedly, the thyroid This seasonal peak which is characteristic -- bscomes active during parts of the season and thon becomes relatively inactive, so you go throush an annual flucThis fluctuation did not aproar after tha winter or 1951-1952. rise, Th oO tuation period. nest year there was no subsequent On the othsr hand, the level at 1.5 nicrocuricvs is going alonz still even after the five years here with its normal cycle rseurrenes; thus, there is apparent damnse here at the 5 microcurie lovel and no dameseo at the .15 microcurie level. .