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Presidential Measurement Timeline


George_Washington  1790 - President George Washington called for a uniform system of currency and weights and measures - an "object of great importance.”
Thomas_Jefferson  1790 - Thomas Jefferson, then Secretary of State, proposed a decimal-based measurement system for the United States in his report Plan for Establishing Uniformity in the Coinage, Weights, and Measures of the United States.
James_Madison  1816 - President James Madison urged Congress to act on the problem of achieving uniformity of weights and measures and recommended "the great utility of a standard fixed in its nature, and founded on the easy rule of decimal proportions."
John_Quincy_Adams_-_copy_of_1843_Philip_Haas_Daguerreotype-1  1821 - While serving as Secretary of State, John Quincy Adams acknowledged that "weights and measures may be ranked among the necessities of life to every individual of human society."
President_Andrew_Johnson  1866 - The metric system of measurement was legally recognized in the United States when President Andrew Johnson signed in the Metric Act of 1866.
 Ulysses_Grant 1875 - Under the Presidency of Ulysses S. Grant, the United States and 16 other nations signed the Treaty of the Meter on May 20, 1875, establishing the International Bureau of Weights and Measures (BIPM).
 Gerald_Ford,_official_Presidential_photo 1975 - President Gerald R. Ford signed the Metric Conversion Act defining federal metric policy. Learn more in the Statement on Signing the Metric Conversion Act of 1975.
 JimmyCarter 1980 - President Jimmy Carter - Metric System Use PDF
"Because I believe metric conversion holds important long-term benefits for our country, I am taking steps to encourage the use of this system in the private sector as well as in government."
George_H__W__Bush  1991 - President George H. W. Bush signed Executive Order 12770, Metric Usage in Federal Government Programs, directing executive departments and federal agencies implement the use of the metric system to “implement the congressional designation of the metric system of measurement as the preferred system of weights and measures for United States trade and commerce.”
 Bill_Clinton 1993 - President Bill Clinton - National Metric Conference PDF
"...It is clear that our country will benefit by encouraging voluntary metric use by industry. These efforts can enhance America's competitive edge and help create new jobs and opportunities for our people."
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Metric Act of 1866-NARA-28-2083a

The Metric Act of 1866.  "No contract or dealing or pleading in any court, shall be deemed invalid or liable to objection because the weights or measures expressed or referred to therein are weight and measures of the metric system." 
Photo Credit:  National Archives and Records Administration (NARA)