Letters Received to H.H. Barker, December 3, 1928

UNIVERSITY OF MISSOURI COLUMBIA DEPARTMENT OF CHEMISTRY December 3, 1928 DFC 5 1928 Mr. H. H. Barker United States Radium Corporation 535 Pearl Street New York, New York My dear Howard: There are one or two small corrections I would like to make on the report about the tests for radioactivity which we conducted on you at the time of your visit. Under the heading of Gamma Ray Measurements, page 1, the second line, under N.D., 40-30 24° - 5", instead of 27. In the Yourth line the drift per second should be 7.20 instead of 7.19, and in the sixth line, the drift per second should be 680 instead of 671, and the average drifts for Barker should be 7.00 instead of 6.95. These changes, however, do not materially affect the activity which is given as three micrograms. During the Thanksgiving Holidays, I have been very much absorbed in some experiments in detecting radium and mesothorium in a living subject. While the experimental data will not be ready to report until the end of the week, I hope, however, that they will offer some suggestions for further experiments and tests on the girls. Up to the present, I cannot say what the outcome of my labors will be. Perhans it will be a weed instead of a fish which I will finally pull up. But at all events the results so far in hand are certainly very illuminating+ With very kind regards, I remain Sincerely yours, Herman Sehlundt Herman Schlundt. HS c b