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Keywords: MassStandards 023.jpg Louis A Fischer Chief of the Division of Weights and Measures from 1901 until his death exhibiting the fundamental standards of the U S in the standards vault National Institute of Standards and Technology National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Weights Metrology Kilogram Units of mass Units of measure |