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accuracy adopted appendix Arago kilogram Archives ards avoirdupois pound B. A. Gould Britain British pound Bronze Yard Bureau of Standards Bureau of Weights bushel Calibrated Coast and Geodetic coinage committee meter comparison Conference on Weights Congress constructed copies cubic inches defined derived equivalent established F. R. Hassler Fischer France fundamental standards Gallatin Geodetic Survey grain International Bureau International Nautical Mile international prototypes International Standard July krypton length and mass line standard Mendenhall Order ment meter and kilogram meter bars metre metric standards metric system metrology millimeters National Bureau national standards Office of Weights platinum platinum-iridium pound avoirdupois precise prototype kilogram result Secretary Senate standard of mass standard of weights standard troy pound Standard Weights standards of length standards vault Sweden-Norway toise Treasury Department Troughton scale troy weights U.S. Coast U.S. nautical mile uniformity United States yard wavelength Weights and Meas weights and measures yard and pound