Photo Gallery
Top left: In research for the National Institute of Law Enforcement and Criminal Justice, National Bureau of Standards scientist Joseph C. Richmond adjusted a passive night vision camera (ca. 1975); top right: E. L. Wallace invented an apparatus for testing the durability of leather inner soles at the National Bureau of Standards (1936); bottom: In 1910, the International Committee for Investigating the Voltmeter met at the Bureau of Standards in Washington, D.C., and carried out a series of intercomparisons that led to a new value for the international volt. Bureau of Standards Director Samuel W. Stratton posed sixth from left.