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Letters Sent to Dr. Frank E. Hoecker, January 22, 1946

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Dr. Frank E. Hoecker, January 22, 1946 University of Kansas, Lawrence Sheet - No. 2 interpretation.We did find, however, on the basis of a few tests com- pleted that apparently there is, as expected, a wide variation between the amount of radium fixed and the amount of radon in the expired air depending upon the length of time during which the radium has been fixed. These measurements, of course, you understand, also are rather difficult to make and subject to considerable error, due to the fact that, in many instances, the direct gamma ray measurement does not necessarily indicate radium fixed in the body, but radium deposited on or in the skin. This is borne out by the fact that, in some instances, the hands of the technicians show a definitely higher concentration than any other portion of the body. If you are interested in additional data along this line, we would be glad to submit a copy after more tests have been made. Very truly yours, Chief Chemist CWWallhausen:rkh

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    "ocrText": "Dr. Frank E. Hoecker,\nJanuary 22, 1946\nUniversity of Kansas,\nLawrence\nSheet - No. 2\ninterpretation.We did find, however, on the basis of a few tests com-\npleted that apparently there is, as expected, a wide variation between\nthe amount of radium fixed and the amount of radon in the expired air\ndepending upon the length of time during which the radium has been\nfixed. These measurements, of course, you understand, also are rather\ndifficult to make and subject to considerable error, due to the fact\nthat, in many instances, the direct gamma ray measurement does not\nnecessarily indicate radium fixed in the body, but radium deposited on\nor in the skin.\nThis is borne out by the fact that, in some instances,\nthe hands of the technicians show a definitely higher concentration than\nany other portion of the body.\nIf you are interested in additional data along this\nline, we would be glad to submit a copy after more tests have been made.\nVery truly yours,\nChief Chemist\nCWWallhausen:rkh"
}