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350 Main Street, Orange, N. J.
November 11, 1925.
Dr. F. B. Flinn,
437 West 59th Street,
Columbia University,
New York City.
Dear Dr. Flinn:-
The sample of activatated zinc sulphide submitted by you for
analysis cont hins 0.0549 milligrams of radium element or its
equivalent when measured by its gamma radiation. This figures
the same na material which contains 2.90 us of radium element
or its equivalent per 100 grams.
Very truly yours,
H. H. Barker.
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"ocrText": "350 Main Street, Orange, N. J.\nNovember 11, 1925.\nDr. F. B. Flinn,\n437 West 59th Street,\nColumbia University,\nNew York City.\nDear Dr. Flinn:-\nThe sample of activatated zinc sulphide submitted by you for\nanalysis cont hins 0.0549 milligrams of radium element or its\nequivalent when measured by its gamma radiation. This figures\nthe same na material which contains 2.90 us of radium element\nor its equivalent per 100 grams.\nVery truly yours,\nH. H. Barker."
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