Letters Received, March 5, 1926

NATIONAL GAUGE AND EQUIPMENT COMPANY STEAM GAGGES GENERAL OFFICE AND FACTORIES VACUUM GAUGES LA CROSSE, WISCONSIN ALTITUDE GAUGES oxY-WELDING GAUGES NEW YORK-DETROIT-CHICAGO - OIL PRESSURE GAUGES AIR PRESSURE GAUGES GASOLINE TANK GAUGES P.M. GELATT, PRESIDENT AUTOMOBILE EQUIPMENT J. M. LAVAQUE, VICE-PRESIDENT AND TREASURER DISTANCE TYPE THERMOMETERS P.E. STROUP, VICE-PRES. SALES DIVISION AMMETERS J.E. RICHMOND, SECRETARY ADDRESS REPLY LA CROSSE, Wis. L. A. Corey ATTENTION OF march 5, 1926 ECFIVED MAR 8 1926 U. S. Radium Corporation 30 Church Street New York City, N.Y. Gentlemen: The inclosed newspaper article was handed to us by one of our employees who has been treating instruments with your Undark. We must admit that it was somewhat of a surprise to us as we have never head of any such dire results caused by Radium Treating instrument faces. However, the article naturally aroused considerable interest amoung our employees and so that we may overcome their fear of this material we would like to have a statement from you as to the effects of using your Undark. Yours very truly, NATIONAL GAUGE &c EQUIPMENT co. BY IB