Letters Received to H.H. Barker, December 5, 1927

PURDUE UNIVERSITY LAFAYETTE, INDIANA SCHOOL OF SCIENCE OFFICE OF THE DEAN RECEN DEC 7 19/7 December 5th, 1 9927. Mr. H. H. Barker, United States Radium Corporation, 535 Pearl Street, New York, N. Y. My dear Mr. Barker: I have your letter of December lst. As regards your definite query, I would say that there was no evidence to indicate that anyone would get any serious injury from the handling of low grade luminous material preparations up to the time of the situation that developed in your laboratory and in that of the Welsbach Company It was, of course, known that it was necessary to use care in connection with high grade radium preparations. As regards the comparative merits of mesothorium and radium in connection with possible disease, it would be difficult to say anything very definite except on the basis that the thorium has a much shorter half life period than radium emanation and should, therefore, probably be less troublesome. I will be able to come to New York on the 12th of January but I will have to be, here between the 16th and 20th of January and, therefore, if there is any postponement of the date I suggest that it would be postponed beyond January 20th. Very sincerely yours, RBM*JR R.B.Manne R. B. Moore Dean of Science Signed in Dean Moore's absence.