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TREASURY DEPARTMENT UNITED STATES PUBLIC HEALTH SERVICE OFFICE OF INDUSTRIAL HYGIENE WASHINGTON, D. C. AND SANITATION Room 1-123, "C" Bldg. 16 Seventh st. , S. W. April 17, 1929 Mr. Howard H. Barker, Vice President, United States Radium Corpn. 535 Pearl st. , 18 1929 New York, N. Y. Dear Mr. Barker: Have you heard anything further in regard to the Wulf filafelectroscope which you are importing? We shall be glad to accept your kind offer to lend it to us just as soon as it is available. Very truly yours, James E - has ( James E. Ives)