Metric system
In 1875 representatives from the governments of twenty different countries met in Paris to discuss weights and measures. Seventeen of the countries signed a treaty about weights and measures. The treaty was called "The Convention of the Metre". The countries that signed were: Argentine Confederation, Austria-Hungary, Belgium, Brazil, Denmark, France, Germany, Italy, Peru, Portugal, Russia, Spain, Sweden and Norway, Switzerland, Turkey, United States and Venezuela. They agreed: