Letters Sent to Dr. Cecil K. Drinker, June 18, 1925

June 18, 1924. Dr. Cecil K. Drinker, Harvard University School of Public Health, 55 Van Dyke St., Boston, Mass. Dear Dr. Drinker:- In order to secure from independent sources information about health conditions existing in the numerous Radium luminous material application plants throughout the country, we are taking advantage of the cooperation of the New Jersey State Department of Health. It would be very helpful I am sure to the Department to know of any final conclus- ions resulting from your investigation. Your preliminary report is rather a discussion with tentative conclusions based on evidence much of which is necessarily circumstantial. I am writing, therefore, to ask whether you are in a position to make any final and conclusive statements pro or con in the matter. You apparently believe that there is nothing injurious in the zinc. Our conclusion is that there is nothing injurious anywhere in the works, but if anything could exist it must be in the zinc, so I do not want you to make a definite statement that phosphorescent zinc sulphide is harmless if taken internally in the amounts possible under prevailing conditions unless you are absolutely sure of your ground. On the other hand, you can doubtless say that the conditions of hygiene maintained at the Plant are above the average, etc. Yours truly, President. ARoeder=HM