(Although not of direct concern to the Nevada iroving Grounds, it is of interest to note that soils were collected from the Narshall Islands following the faliout 1m early sarch 1954. Appendix -| suamarizes these date.) A racent report® strongly suggests that contamination of leaf surfaces followed by either direct consumption or intake by way of milk is far more en Lspertant pathway of intake than by the soil-plant-aninmal cycle, at least for those times of yesr when plants may be in a state of growth to eollect the fallout. Further gndysis is being planned. This same report* raises a new problem. Based on stated assumptions, tie data presented indicates that doses to the thyroid from fodine radioisotope: may be a greater Lasard than x Further, the rejort suggests that for-tiose tines sfyear vhen intske of fallout. nstertalaayoon.by-vay2f-jeafs-surfaeec, the dose to the thyroid (delivered in a few veeks) may be wany times greater than the theoretical maximus external dose. Additional evaluation will be given thie problem. #he: L.c, july 1954 USAEC, Division of Biology and Medicine, SECRET) twashington, bee PeCiL: iED iw “as Sed ORK i ane 5B