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Nov 12 1#25
Copy to New York Office.
UNITED STATES
350 Main Street, Orange, N.
J. NUM CORP.
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 contains 0.0549 milligrams of radium element or its
equivalent when measured by its gamma radiation. This figures
the same as material which contains 2.90 mg of radium element
or its equivalent per 100 grams.
Very truly yours,
H. H. Barker.
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"ocrText": "Nov 12 1#25\nCopy to New York Office.\nUNITED STATES\n350 Main Street, Orange, N.\nJ. NUM CORP.\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 contains 0.0549 milligrams of radium element or its\nequivalent when measured by its gamma radiation. This figures\nthe same as material which contains 2.90 mg of radium element\nor its equivalent per 100 grams.\nVery truly yours,\nH. H. Barker."
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