ee) Dre Bugier , ' toe a : ‘ .: : Be - . a + » ‘Septasber 16) 1954 - a co . eeo st+23 me sine - . . a a Hy analysis.of the ‘dmalation V8.; oral ingestionroutes:‘of uptake 5. leads me to believe ingestion ismuch the more importants ~’ Hardia oie, Jones, however, believes inhalationexplains his data better, If*: _it is assumed,that’oral ingestion is dominant, one wouldexpéct *! he human activity,to be lower thangrazing animalst, (However, were.ee milk {9 an important dietary component, available data on I trans- ©“; ~ mission through milk suggest that human thyroids would not be much. lower in activity/gm than thecowst.) LeRoy's data probably give” . only an upper limit to the average Anerican human thyroid activity; .” the actual value is quite likely lowerbya sonsiderable Feotor. My ‘calculations are based on LeRoy" 3.values."a Tine Scale of 1-131 Ingestion Fe oe o To extrapolate from observed activity.in uly, to “eseancted d « ose t « a of ingestion as a function of time. Preliminary data from lynch 2h on fallout indicate.‘hat essentially all I-13] measuredin June. - ‘ \ te Tai - + dp Tae and July originated fromthe May k shot. ‘otal falloutin the. >" U. S. from CASTLE was about 3 times that from the Way shot, . been tires, oe ose that total] thyroid dose from CASTLE would have such bog dl sen times that from the Kay h shots: Sayer ow from the fnll CASTLE series, an estinate must be made of quantity Lote , eeTa a t att fallouta - ed that ed! in the Oso Inwy calcilat{ons Ihave assum from the Hay h ‘shot occurred on Way 15, and that a continuous ingestion of I-13] was thereafter maintained at a constant are of fissions per day. ~ " pISTRIBUTION: copyyA ~De. Bucher 3 ca- Biophysics Branch. ab. OFFICE > SURNAME p>» DATE ARC-318 SOvrEn' orice 1662761. 7 . “D ebartment ofEnergy. nn enen te nn eh nisterian’s Cffice