What happened in the 1870s?
๐ Introduction of the Metric System in the United States (1875): Although not widely adopted, the U.S. passed the Metric Act to encourage use of the metric system.
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Further Reading
Metric Conversion Act - Wikipedia (wikipedia.org)
Metrication in Law | NIST (nist.gov)
Why has America not adopted the universal metric system although ... (quora.com)
Metric Act of 1866 - US Metric Association (usma.org)
THE UNITED STATES AND THE METRIC SYSTEM (usma.org)
When did the metric system come into use in the USA? Why ... - Quora (quora.com)
Metrication in the United States - Wikipedia (wikipedia.org)
How did countries roll out the metric system? Why did the U.S. ... (reddit.com)