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Marie Curie and the NBS Radium Standards
1913: The U.S. Curie standard
1921: Marie Curie visits the United States
1927: NBS gold leaf electroscope
1929: Marie Curie visits the Hoover White House
1937: NBS Hönigschmid standard
1940s: NBS Radon measurements
1950s: Calorimetric comparisons of national radium standards
Present: status of national standards
Biographies of Participants
Acknowledgments and Photo Credits
Bibliography
Exhibit written by Bert Coursey and designed by Johnathan Coursey
Online: June 1999