On this day in 1875 – the Metre Convention is signed by 17 nations, leading to the establishment of the International System of Units.
On this day in 1875 – the Metre Convention is signed by 17 nations, leading to the establishment of the International System of Units.
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The Metre Convention (*Convention du Mètre*), also known as the Treaty of the Metre, is an international treaty that was signed in Paris on 20 May 1875 by representatives of 17 nations: Argentina, Austria-Hungary, Belgium, Brazil, Denmark, France, Germany, Italy, Peru, Portugal, Russia, Spain, Sweden and Norway, Switzerland, Ottoman Empire, United States of America, and Venezuela.
How come weight is kilogram and not gram?