Letters Sent to P.E. Stringer, July 1, 1926

July 1, 1926. Mr. P. E. Stringer, Director of Manufacturing, Elgin Mational Watch Company, Elgin, Illinois. Dear Mr. Stringer: This will acknowledge receipt of your letter of June 29th regarding proper safemards to workors who handle Radivm luminous material. It would seem that- the method which you are now employing is about as effective as can be adopted. It has not been established that there is any danger in the use of luminous material. However, all possible precautions are decirable. The chief danger, if anys lies in the practice of pointing brushes between the lips, but aince you use pens instead of brushes, there can certainly be no danger of your operators getting luminous material in their mouths and possibly docayed teeth. So fax as the radium rays from the material are concerned, there can be no danger as the rodium is not in sufficiently concentrated form and in sufficiently large quantities to produce a burn. You might be interested in knowing that there has been a very careful study made of this entire quention by one of New York's leading industrial experts. Copies now are being prepared of this article and we shall certainly be glad to send you a copy within & few days. If there is anything further on this subject, we shall be only too glad to have you communicate with us further. Very truly yours, President. CBLee-HM