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OCR Page 1 of 6EXAMINATION FOR RADIO-ACTIVITY - OF FIVE COMPLAINANTS AGAINST THE
UNITED STATES RADIUM CORPORATION
by
DR. FREDERICK B. FLINN AND DR. HERMAN SCHLUNDT.
The object of the tests made was to detect the presence of radioactive
substances - radium and mesothorium - in bodies of the complainants.
The examination was conducted in Dr. Martland's office in the City
Hospi tal, Newark, on Sunday, April 22, 1928. The tests were made jointly
by Dr. Flinn and myself.
Experimental Method: Measurements were made by means of a very sen-
sitive gamma ray electroscope with quartz fiber mounting. Each person was
tested for radio-activity by placing the electroscope close to the middle of the
back, the person being seated in a chair. Before testing the person the
natural drift of the instrument was first carefully taken, by both Dr. Flinn
and myself working independently. The person under examination was then seated
in a chair close to the instrument and readings of the drift were again taken by
each observer independently. (We may remark here that Dr. Goetler and Mrs.
Hughes, observers for complainants, also made readings on our instrument while
the tests were in progress, but thoir readings were made entirely independent
of our own, and we have no knowledge of the results they recordede) After
two independent sets of readings had been taken by us, the person under test was
excused, and the natural drift of the testing instrument was takon again, before
the next test was made on the next person. Ve wish to emphasize one point in
this procedure, namely that between each test on the persons examined we tested
the natural leak or drift of the testing electroscope. Making the tests in
this way we can detect at once any slight changes in the behavior of the testing
electroscope. Then too we wish to point out that all readings were taken over
approximately the same part of the scale of the instrument.
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