Letters Sent to Clair Charles, July 12, 1926

stad lo 10'1 \ lo July 12th, 1926. Radium Health Laboratories, 1614 v. Washington Zoulevard, Los Angeles, California. Attention: Mrs. Clair Charles. Gentlement- herowith you will find article entitled "Radio Active Material an Industrial Hazard9", by Dr. Frederick B. Flinn, Ph. Des Assistant Professor of Puysiologr in Industrial Hygiens, Colleg of Physicians and Surgeons, Columbia University, which treats of the so called #radiom necrosis* or radium poisoning cases. The invostization by Dr. Flinn, which formed the basis of his article, has been by far the most thorough and far reaching work undertakon on this subject. This article will appear in one of the early issues of the Journal of the American Medioal Association. mile it seems that the charge of poisoning" caused the death of several girls (which charge was widely advertised through the press a few months ago) ie entiroly unfounded, we naturally hesitate - without further investigation - to malte the broad statement that redium in luminous matorial is mhannful, al though wo believe this to be the case. Therefore in order to be on the safe side, we asution you, if you have not already done so, to order your operators not to point their application brushos betwoon their lips. Honover we receive any further authentic information on the subject, we shall be glad to pasa it along to you. Yours very truly, President. CBLEE-OB Enclosure (1)