Letters Received to H.H. Barker, July 27, 1931

UNIVERSITY OF MISSOURI COLUMBIA DEPARTMENTT OF CHEMISTRY July 27th, 1931. Mr. H. H. Barker JUL 23 1931 U. S. Radium Corporation 535 Pearl Street New York City, New York My dear Barker: Our graduate student who is working on radium poisoning in rats has just been in to tell me that he has again exhausted his supply of radium bro mide; and that the rats are still in good, healthy condition, notwithstanding the heat. I think that he has given them very careful diet and attention, but he has now reached the stage where he thinks that it is advisable to actually kill off one or two of then to get confirmation of the radium content of the rats, which has up to this time been determined only roughly by the gamma ray method. We simply put the rat in a paper holder and strap it to the electroscope, but this method gives us only relative results for the instru- ment has not been calibrated; but by analyzing the skeletons of a of these rats we should be able to get a fairly good calibration constant of the instru- ment. This week-end my daughter, Esther, ex- pects to come home and then we shall be able to make our plans for the summer. I have thus far been unable to make any definite plans for vacation because Mrs. Schlundt has not decided whether or not she should go up to Mayo Brothers for a thorough examination. She is still in the resting treatment for heart trouble and she thinks she is not making very much progress. I am still hoping that I shall be able to get about two weeks in Colorado. Sincerely yours, Herman Schlendt Herman Schlundt. hs.as