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UNIVERSITY OF MISSOURI
COLUMBIA
DEPARTMENT OF CHEMISTRY
September 8, 1930.
Mr. H. H. Barker
U. S. Radium Corporation
535 Pearl Street
New York City
SEP111930
My dear Mr. Barker:
After I reached Michigan and began
to reflect a little about the anomalous results we
obtained in our test of the expired air from Mrs.
Tuck, I wrote to Dr. Flinn and requested that he make
an examination of the ionization chamber #7 which was
used in the test. Our gamma ray measurements this
time checked almost exactly with the measurement we
made about a year ago. It therefore occurred to me
that the electrode in chamber #7 had dropped out and
was not in position at the time the measurements were
made. This morning I have a letter from Dr. Flinn,
who was evidently out of town for several weeks,
saying that my misgivings as to chamber #7 are
entirely correct and we must therefore report that
the expired air tests for Mrs. Metz and Mrs. Tuck
are of no value. This discovery will not change our
conclusion regarding the activity of Mrs. Tuck, but
it does cast a little doubt upon the possible activity
of Mrs. Metz which we found entirely negative by the
gamma ray method.
I am sorry that we did not discover
this failure of chamber #7 at the time of our measure-
ments. In fact, I think it was rather stupid of us
not to think of it at the time.
If you have any suggestions as to
what we can do to correct our test, we shall be glad
to do it. It has occurred to me that Dr. Flinn being
right close to Newark, might consent to repeat the
expired air on these two girls by having them come
to his laboratory. test
With very kind regards, I remain
Herman Yours very Schlundt truly,
Herman Schlundt.
HS/GMA
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"ocrText": "UNIVERSITY OF MISSOURI\nCOLUMBIA\nDEPARTMENT OF CHEMISTRY\nSeptember 8, 1930.\nMr. H. H. Barker\nU. S. Radium Corporation\n535 Pearl Street\nNew York City\nSEP111930\nMy dear Mr. Barker:\nAfter I reached Michigan and began\nto reflect a little about the anomalous results we\nobtained in our test of the expired air from Mrs.\nTuck, I wrote to Dr. Flinn and requested that he make\nan examination of the ionization chamber #7 which was\nused in the test. Our gamma ray measurements this\ntime checked almost exactly with the measurement we\nmade about a year ago. It therefore occurred to me\nthat the electrode in chamber #7 had dropped out and\nwas not in position at the time the measurements were\nmade. This morning I have a letter from Dr. Flinn,\nwho was evidently out of town for several weeks,\nsaying that my misgivings as to chamber #7 are\nentirely correct and we must therefore report that\nthe expired air tests for Mrs. Metz and Mrs. Tuck\nare of no value. This discovery will not change our\nconclusion regarding the activity of Mrs. Tuck, but\nit does cast a little doubt upon the possible activity\nof Mrs. Metz which we found entirely negative by the\ngamma ray method.\nI am sorry that we did not discover\nthis failure of chamber #7 at the time of our measure-\nments. In fact, I think it was rather stupid of us\nnot to think of it at the time.\nIf you have any suggestions as to\nwhat we can do to correct our test, we shall be glad\nto do it. It has occurred to me that Dr. Flinn being\nright close to Newark, might consent to repeat the\nexpired air on these two girls by having them come\nto his laboratory. test\nWith very kind regards, I remain\nHerman Yours very Schlundt truly,\nHerman Schlundt.\nHS/GMA"
}