radioactivity in the patient's urine has also been reduced very mich by now. nThe symptoms may be described separately for the external in- juries to the body surface and the injuries to the organs, es- pecially the blood producing organs, nAll patients suffered on the head and the upper half of the . body such external injuries as the depilation, deposit of pigment, inflammation of the skin, ulcer, eruption with abcess and scab, and blister. They are recovering from these injuries by the treatment in the hospitals. But some of them are still suffering from the depilation in wide area. "The injury to blood-producing organs was observed as the decrease of blood count of leucocyte, granulocyte and red blood corpuscles as well as the decrease of the number of cells in the marrow, was getting worse since they were hospitalized. It Especially, the blood count of leucocyte fluctuated around 1000 per cubic milimeter and the number of marrow cells has been of the order of 10,000 per cubic milimeter in several cases. It was thus hematologically diagnosed to be the general acute sickness of the marrow, "In these cases, in spite of the ample blood transfusion and the use of pills for blood-production, the blood count of the leucocyte and granulocyte did not increase and even the hemorrhagic tendency appeared. Furthermore, their temperature had been as high as 39°C though very effective pills of antibiotic had been given, which has made us fear of an unfavorable prognosis. Such a dangerous condition continued until recently and we had to refrain from publishing the facts in order to avoid undesirable effects on the treatment of the patients. Fortunately, however, the fever began to leave the patients very recently and moreover the blood count of leucocyte in some of the serious cases began to increase. We are working hard to cure the patients completely. It would be our duty and also the hope of all people to save the lives of all patients of this unfortunate accident." Summarizing the clinical symptoms, it may be said that the skin burn by the @- ray has almost been cured. There is now hardly any detectable radioactivity remaining on the skin surface. The most serious problem is the injury to the marrow, Two causes may be responsible for this. One is the radiation (especially the y-ray) from outside, and the other is that of the radioactive elements deposited in the body. The clinical symptoms observed up to now may be mainly caused by the former although some part might have been played by the latter too. This may be evident in view of the fact that the estimated radiation to which the fishermen were exposed during the two weeks stay on the boat amounts to 200 r. -SDenerimer” ~~ r Ne Wlabaytees | palheci The intensity of radiation