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Partly-printed DS as president, signed “R. B. Hayes,” one page, 7.75 x 9.75, May 28, 1878. President Hayes authorizes and directs the Secretary of State to cause the Seal of the United States to be affixed to "my ratification of the Metric Convention between the United States and certain other countries, signed at Paris, May 20, 1875." Signed at the conclusion by President Rutherford B. Hayes. In fine condition.
The 1875 'Treaty of the Metre' was an international agreement signed in Paris on May 20, 1875, by representatives of 17 countries to unify and standardize measurements worldwide. It established the International Bureau of Weights and Measures (BIPM), along with its governing bodies—the General Conference on Weights and Measures (CGPM) and the International Committee for Weights and Measures (CIPM)—to coordinate international metrology and maintain consistent measurement standards, beginning with length and mass and later expanding to all physical quantities. This treaty created a permanent organizational structure for nations to collaborate on measurement systems, laying the foundation for what would evolve into the modern International System of Units (SI).
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