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JUN 22 1931
UNIVERSITY OF MISSOURI
COLUMBIA
DEPARTMENT OF CHEMISTRY
June 18th, 1931.
Mr. H. E. Barker
United States Radium Corporation
535 Pearl Street
New York City, New York
My dear Barker:
The student, Mr. Horace Thomas, is continuing
his experiments of administering radium to a group of eight
or ten rats. He is staying here all summer, or a good share
of it anyhow, to complete the first series of these experi-
ments. We had expected that some of the rats would succumb
to the radium doses which they have received. Two of the
rats have been given a total of 30 mierograms, injected in-
travenously, but they are still thriving and apparently the
expected anemia is only very slight. It looks as if we would
have to kill one or two of the rats in order to get some
definite information regarding the amount of radium they ac-
tually contain; and in this way get a calibration of our
Wulff gamma ray electroscope, which we are using to measure
the activity of the rats. Of course, we can not get expired
air tests on these small animals, or at least we have not yet
made an attempt to do so.
We need about 20 more 5-mierogram ampoules to
continue the experiments a step or two farther.
Let me suggest that you send a copy of your
criticism to Dr. Leake's report as well as a copy of the re-
port to Dr. Lind, as presented at the meeting of the American
Medical Association, for his information and suggestions.
Under separate cover I am sending you a few
samples of phosphorescent zinc sulfide which Mr. William J.
Byler prepared during the past year.
Sincerely yours,
Herman Schlundt
Herman Schlundt.
hs.as
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"ocrText": "JUN 22 1931\nUNIVERSITY OF MISSOURI\nCOLUMBIA\nDEPARTMENT OF CHEMISTRY\nJune 18th, 1931.\nMr. H. E. Barker\nUnited States Radium Corporation\n535 Pearl Street\nNew York City, New York\nMy dear Barker:\nThe student, Mr. Horace Thomas, is continuing\nhis experiments of administering radium to a group of eight\nor ten rats. He is staying here all summer, or a good share\nof it anyhow, to complete the first series of these experi-\nments. We had expected that some of the rats would succumb\nto the radium doses which they have received. Two of the\nrats have been given a total of 30 mierograms, injected in-\ntravenously, but they are still thriving and apparently the\nexpected anemia is only very slight. It looks as if we would\nhave to kill one or two of the rats in order to get some\ndefinite information regarding the amount of radium they ac-\ntually contain; and in this way get a calibration of our\nWulff gamma ray electroscope, which we are using to measure\nthe activity of the rats. Of course, we can not get expired\nair tests on these small animals, or at least we have not yet\nmade an attempt to do so.\nWe need about 20 more 5-mierogram ampoules to\ncontinue the experiments a step or two farther.\nLet me suggest that you send a copy of your\ncriticism to Dr. Leake's report as well as a copy of the re-\nport to Dr. Lind, as presented at the meeting of the American\nMedical Association, for his information and suggestions.\nUnder separate cover I am sending you a few\nsamples of phosphorescent zinc sulfide which Mr. William J.\nByler prepared during the past year.\nSincerely yours,\nHerman Schlundt\nHerman Schlundt.\nhs.as"
}