186 , strontium and that gives an infinitive dose of less than one breadth. DR. BUGHER: It has been discussed in the sense of extremely small inasmuch as the total activity is probably much less than tolerance when you think of thet over a long period of time. That is the catch here, I think, and if you X-ray a bone, you are going to give more of a dose probably in the course of the examimtion than the internally deposited Alderson Reporting Company Washington, D. C isotope is going © be able to give, which makes it 10 difficult to arrange a series dexaminatims to allow for 11 that factor. LT. LOONEY: 12 Sir, in regard to the x-rays according 13 to the Brookhaven group,60 to 70 per cent of the radiation 14 will be expended in the first three centimeters, and 8 pz cent 15 at 8. 16 So the radiatim of te bone wuld be very small. Another thing I would like to emphasize here is 17 the marked variation that we found in the radium patients wheh 18 estimating body burden from urinary excretim. 19 factor of eight. 20 expect a much greater range from the estimatim 21 This was long range. We found a I would certain of the total body burden from urinary excretion. One of the things is that we can work out the most 23 practical and sensible means of handling situations of this ARC 24 sort in the future by this method. with Dr. Cohn, Going over this wrk the likelihood of malignancies developing ‘y oa at ant of£ Tw incr Deparime: Kore (3.