This image is part of the Radioactivity Laboratory collection. Research in radium began at the National Bureau of Standards (NBS) in December 1913 when a phial containing 20.28 milligrams of pure radium arrived from abroad. It was a certified equivalent to the International Radium Standard at Sevres, and a cover communication described its comparison with another quantity of radium salts prepared at Vienna and accepted as a second standard. NBS served hospitals and physicians by analyzing their radium salts against the international standard.
Rights
The images in the Radioactivity Measurement Laboratory Photographic Collection are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder. Use of the images from NIST Digital Collections is not restricted, but a statement of attribution is required. Please use the following attribution statement: "National Institute of Standards and Technology Digital Collections, Gaithersburg, MD 20899."
