4 Japanese scicntists anc government officials on March 24, I made a furthor offer, in behalf of the Atomic Ener-r Comnissicn, to vrovide whatover facilities were available for ovalw.tion oF thre radiclogical factors involved in the incidont. I roported the assurances repeated cerlier by Or. Morton that we wished sinccrely to be of assistance, that our participation wes not movivated (as some Japanese sugsested) by the opportunities for sciertific studies, and tnat whatever data we obtaineé would be turned sver to the Jupanese investigators tc be used by trem in any way they saw fit. At this point it woula be desirable to list the radiological studies which had been already made by the Japanese, These studies are of intercst BPecesuse they indicate theextent of Japancse capabilities in this field, and aefine the extent to which our facilities would bc helpful to the Janancseo, Maru, (1) Using a Cutic Pic, they measured the radioactivity of the Fukuryu Theso data appear completely satisfactory and prove to be in good agrecment with measurements made with American calibrated cquipment, (2) They measured racioactivity of the fish anc fishermen, using portable survey equinment. Howevor, their equipment was not calibrated and their data were siven in counts per minute as determined by the original factory calibration, (3) They Cetermined that the as: recovered from the vessel was radioactive using = ond window GM tube and sealor, Their comtinge syston was not calibratcd anc they reported counts per minute with no knowledge of the factor requircc to convert their data to standard units, (4) They completed a qualitative raciochenical analysis of the ash and reported tne following: 65r89, YS1l, Zr95, No9dSm, NE9Y5, RulO3, Rull6, Rn106, Sb127, TelS2, 1131, 1132, Bal40, Lels0, Col41, Cel44, (More recently they have completed a semi-quantitative analysis for a few isotopes). (5) They hed scanned the bodies of the fisherren with a GM probe, (5) They had administered a dose of 2521 to 1 mousc, as described carlier. (7) Using an imersion trpe GM tube, they had demonstrated radio-— activity in the urine of 3 fishermen, As before, their cquipment was not calitratce anc the absclute activity could not be determined, Witan this as the status of their investigstion at the time of my arrival, ant. following several hours during which I acquainted the Jacanese with-our experienec in this field, I offered the following services to them: (1) Complete radiochemical analysis of 2% hour urine collections from all patients, In view of the importance of this analysis in ovalusting the status of the patients, T urged that these samples be furnished immeciately and assured then that in one week it would be possible to Sive then a report for the constituonts of vrincipsl biological importance, I explained the need for serial samples an. suggested that collections be made at weekly intervals, They ecemed anxious to sccert this servicc. UTEAL