' ed, Japanese scicntists anc government officials on March 24, I made a further offer, in behalf of the Atomic Enersy Comission, to previde whatever facilities were available for cvalustion of tre radiolcgical factors in- volved in tre incidont, I repeated the assurances repeated cerlier by Dr, Morton that we wished sincerely to be of assistance, that our participation was not motivated (as somo Japancse suggestod) by the opportunities for scientific studies, ard that whatever data we obtained would be turned over to tne Joanese investigntors to be used by trem in any way they saw fit. At this point it would be desirable to list the radiological studies which had been already made by the Japanese. These studies are of intercst beesuse they indicate theextent of Japanese capabilities in this fielc, and cefine tre oxtent to which our facilities would be helpful to the Japancsea, Maru, (1) Using a Cutic Pic, they measured the radioactivity of the Fukuryu These data appear completely satisfactory and prove to be in good acreemcnt witn measurements made with American calibrated cquipment. (2) They measured racioactivity of the fish and fishermen, using portable survey equioment, Howevor, their equipment was not calibrated and their data wore given in counts per minute as determined by the original factor; calibration, (3) They Cetermined that tne asx recovered from the vessel was radioactive using a. end window GM tube and scalcr, Their counting system was not calibratcc anc they repartec counts per minute with no knowledge of the factor required to convert their data to standard units, (4) They completed a qualitative radiochemical analysis of the ash and reported the following: Sr89, Y91, Zr95, Nog5m, N66, RulO03, Ruldé, R106, Sbl27, Tel32, 1151, 1152, Eal40, LaliO, Coll, Cel44, (More reecntly they have completed a semi-quantitative analysis for a fow isotopes). (5) They hed scanned the bodies of the fishermen with a GM probe, (6) They had administered a dose of asn tc 1 mouse, as described carlicr,. (7) Using an imersior trpe GM tube, they hed demonstrated radio- activity in the urine of 3 fishermen. As before, their equipment was not calibratceé anc tne abs:lute activity could not be cetermined, Wita tnis as the status of their investigstion at the time of mr arrival, and following several hours curing which I acquainted the Japancse with.our experience in this field, I offered the following sorvices to thom: (1) Complete radiochemical analysis of 24 hour urine collections from all patients, In view of the importance of this analysis in evalu=ting the status of the patients, @ urgod that these samples be furnished imnediatcly and assured then that in one week it would be possible to Sive then a report for the constitucnts of princip2l biological importance. I explained the need for serial samples an. suggested thet collections be made at weekly intervals, They scemed anxious to accept this service,