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OCR Page 1 of 2U.S. DEPARTMENT OF LABOR
SK:HD.
BUREAU OF LABOR STATISTICS
WASHINGTON
April 29th, 192 9
APR 30
Mr. C. B. Lee, President,
APR 301929
United States Radium Corporation,
535 Pearl Street,
New York, N. Y.
My dear Mr. Lee:
On April 20 I sent you a letter concerning
lemental contents of Undark luminous material.
As I have not, so far heard from you, I fear the
letter somehow went astray, and am consequently inclosing
a copy of it for your consideration.
Sincerely yours,
S. Kjaer.
8. your
Repr. U. S. Bureau
of Labor Statistics.
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