Letters Received to C. Lee [C.B. Lee], October 21, 1943

Columbia Unibersity College of Physicians and Gurgeons 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 e 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, Gredericb B.Fling N.D. Frederick B. Flinn Director of Industrial Hygiene. FBF: GD