The meter is invented as 1/10,000,000 of the distance from the equator to the North Pole
1790 - 1795
France was the first country to adopt the metric system
1795 - 1866
The Metric Act of 1866 made it legal to use Metric Measurements in the United States
1866 - 1875
An international agreement known as the meter convention set up well defined metric standards for length and mass and established permanent mechanisms to recommend and adopt further refinements in the metric system.
1875 - 1893
U.S. Customary Measurements are officially defined in Metric terms by the Mendanhall Order.
1893 - 1974
A United States law that encourages schools to teach the Metric system passed.
1974 - 1975
The Metric Conversion Act was passed to plan for and encourage the change the Metric in the U.S