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{
    "localId": "75721402",
    "label": "Letters Sent to Dr. Frederick B. Flinn, April 12, 1927",
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    "id": "75721402",
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    "title": "Letters Sent to Dr. Frederick B. Flinn, April 12, 1927",
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        "Safety Light Collection",
        "Records Related to Radium Dial Painters"
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    "seq": 3,
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    "ocrText": "April 12th,1927.\nDr. Prederick B. Flinn,\nCollege of Physicians and Surgeons,\nColumbia University,\n437 West 59th St.,\nN.Y.C.\nDear Dr. Flinn:\nI regret that there was some confusion as to just how you\nwanted the results from the Dunn case reported,a I was endeavoring to\ngive you a more or less complete picture on the same basis as I computed\nthat of Dr. Leman, but am now glad to give you, in accordance with your\nrequest, the determinations as made upon the samples you submitted to me.\nI will first give you the actual weights of the samples\nwhich were received:\nBone\n3.88 grams\nKidney\n1.83\nIf\nLungs\n1.64\n#\nLiver\n8.04 #\nSpleen\n1.86\n#\nThe equivalent Uranium Oxide content of the various specimens\nis as follows:\nBone\n.698 grams\nKidney\n.0051 #\nLungs\n.0028 #\nLiver\n.0128 #\nSpleen\n.0018 #\nThe radium determinations as made by the Emanation Method\nare as follows:\nBone\n2.37 X 10-8\nKidney\n3.02 x 10-9\nLungs\n3.69 X 10-9\nLiver\n1.28 X 10-8\nSpleen\n1.17 X 10-8\nThese values are all expressed in terms of grams of radium element.\nFrom the fact that one gram of Uranium Oxide emits 8.1 x 10⁴\nalpha particles per second, and that one gram of radium element in equilibrium\n-2-\nwith its decay products inclusive of radium \"C\" emits 14.88 X 1010\nalpha particles per second, one is able to compute in terms of\nradium element the number of milligrams of radium element in such\norgans as were found to be active.\nAs you will recall I did not make quantitative mesothorium\ndeterminations in the Leman case, neither have I in that of Miss\nDunn, although I made qualitative determinations to establish that\nmesothorium as well as the radium decay products of slow change\nwere present in the bone.\nThe data serves to indicate that the bone is the only\norgan which shows anything more than a trace of radio-activity,\nwhich according to my method of computation shows in the neighbor-\nhood of 140 to 150 micrograms, while the other organs combined show\nless than 0.1 micrograms.\nVery truly yours,\nVice President.\nHHBarker:RH"
}