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Columbia University
College of Physicians and Surgeons
DE LAMAR INSTITUTE OF PUBLIC HEALTH
600 WEST 168TH STREET, NEW YORK 32
DIVISION OF INDUSTRIAL HYGIENE
October 21, 1943
Mr. C. Lee,
United States Radium Corp.
535 Pearl Street,
New York City, N.Y.
OCT 23 1943
Dear Mr. Lee:
Because of the new code for luminous dial
painters I feel that it will be better for me to with-
draw from making radium determinations. It will be
necessary for me to get the approval of the Commissioner.
This might cause a lot of complication and he would
probably want to get Dr. Evans's approval of the method.
I have just received a letter from Dr. Curtiss
in which he said he doubts if my method is sensitive
enough to make the required determinations. He said he
has found 10 percent of his examinations showed a con-
siderable increase over the toleration. He has heard
that I have never found over 10-11 which confirms his
belief.
Personally I think that the reason these
amounts are above the toleration limit is because of
inhaled dust. I think your plant does not have the
quantity of dust in the method of handling that other
plants may have. The record I have seen of Evans's
tests indicate this. the decay products of radon do
not give off any gas in the expired air.
One cannot get a linear electrometer at this
time.
In as much as I expect to retire in a year
you might just as well make the arrangements necessary
to have this work done. We can continue to make the
physical examinations and even might collect the expired
air for the radium test and ship it if you so desire.
Yours very truly,
Indericb B.Fling G.D.
Frederick B. Flinn
Director of Industrial Hygiene.
FBF: GD
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"ocrText": "Columbia University\nCollege of Physicians and Surgeons\nDE LAMAR INSTITUTE OF PUBLIC HEALTH\n600 WEST 168TH STREET, NEW YORK 32\nDIVISION OF INDUSTRIAL HYGIENE\nOctober 21, 1943\nMr. C. Lee,\nUnited States Radium Corp.\n535 Pearl Street,\nNew York City, N.Y.\nOCT 23 1943\nDear Mr. Lee:\nBecause of the new code for luminous dial\npainters I feel that it will be better for me to with-\ndraw from making radium determinations. It will be\nnecessary for me to get the approval of the Commissioner.\nThis might cause a lot of complication and he would\nprobably want to get Dr. Evans's approval of the method.\nI have just received a letter from Dr. Curtiss\nin which he said he doubts if my method is sensitive\nenough to make the required determinations. He said he\nhas found 10 percent of his examinations showed a con-\nsiderable increase over the toleration. He has heard\nthat I have never found over 10-11 which confirms his\nbelief.\nPersonally I think that the reason these\namounts are above the toleration limit is because of\ninhaled dust. I think your plant does not have the\nquantity of dust in the method of handling that other\nplants may have. The record I have seen of Evans's\ntests indicate this. the decay products of radon do\nnot give off any gas in the expired air.\nOne cannot get a linear electrometer at this\ntime.\nIn as much as I expect to retire in a year\nyou might just as well make the arrangements necessary\nto have this work done. We can continue to make the\nphysical examinations and even might collect the expired\nair for the radium test and ship it if you so desire.\nYours very truly,\nIndericb B.Fling G.D.\nFrederick B. Flinn\nDirector of Industrial Hygiene.\nFBF: GD"
}