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Letters Sent to Dr. Frank E. Hoecker, February 20, 1946

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February 20, 1946 Surgeon General, U. S. Public Health Service, Washington 14, D. C. Attention: Dr. Frank E. Hoecker Gentlemen:- We are enclosing a copy of the result of measurements made by Drs. Hess and Flinn on dial painters in our employ during the past few years. We have not as yet received any comment from Dr. Greenburg who is also making a study of these results. With reference to the question of the direct measurement of radium in the body by the gamma ray method, our results are still inconclusive and of too small a number to make any positive predictions. We agree that the measurement is rather difficult since it is virtually impossible to isolate the effect of external contamination from the total measurement. We have found on some of our technicians that this external effect is quite large and whether it will ever be possible to definitely isolate the external and internal effects cannot be predicted on the basis of present results. We expect to start another series of tests within about two to three weeks and will, at that time, send you a report if the results are sufficiently clear to be used as a basis for drawing any conclusions. Very truly yours, Chief Chemist CWWallhausen:rkh enc.

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Source index
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Type
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Size
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    "ocrText": "February 20, 1946\nSurgeon General,\nU. S. Public Health Service,\nWashington 14, D. C.\nAttention: Dr. Frank E. Hoecker\nGentlemen:-\nWe are enclosing a copy of the result of\nmeasurements made by Drs. Hess and Flinn on dial painters in\nour employ during the past few years. We have not as yet\nreceived any comment from Dr. Greenburg who is also making a\nstudy of these results.\nWith reference to the question of the direct\nmeasurement of radium in the body by the gamma ray method, our\nresults are still inconclusive and of too small a number to\nmake any positive predictions. We agree that the measurement is\nrather difficult since it is virtually impossible to isolate the\neffect of external contamination from the total measurement. We\nhave found on some of our technicians that this external effect\nis quite large and whether it will ever be possible to definitely\nisolate the external and internal effects cannot be predicted on\nthe basis of present results.\nWe expect to start another series of tests\nwithin about two to three weeks and will, at that time, send you\na report if the results are sufficiently clear to be used as a\nbasis for drawing any conclusions.\nVery truly yours,\nChief Chemist\nCWWallhausen:rkh\nenc."
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