The four kinds of paper money printed by the New England colonies (Connecticut, Massachusetts Bay, New Hampshire and Rhode Island) were legal tender in all four until 1750. The governments of the colonies even accepted them for tax payments. Massachusetts - by far the dominant economy of the quartet - sustained this arrangement for almost a century. The other colonies became so envious that they began to print additional notes outside the union. Massachusetts - facing a threat of devaluation and inflation - redeemed for silver its share of the paper money in 1751. It then retired from the union, instituted its own, silver-standard (mono-metallic), currency and never looked back. A far more important attempt was the Latin Monetary Union (LMU). It was dreamt up by the French, obsessed, as usual, by their declining geopolitical fortunes and monetary prowess. Belgium already adopted the French franc when it became independent in 1830. The LMU was a natural extension of this franc zone and, as the two teamed up with Switzerland in 1848, they encouraged others to join them. Italy followed suit in 1861. When Greece and Bulgaria acceded in 1867, the members established a currency union based on a bimetallic (silver and gold) standard. The LMU was considered sufficiently serious to be able to flirt with Austria and Spain when its Foundation Treaty was officially signed in 1865 in Paris. This despite the fact that its French-inspired rules seemed often to sacrifice the economic to the politically expedient, or to the grandiose. The LMU was an official subset of an unofficial "franc area" (monetary union based on the French franc). This is similar to the use of the US dollar or the euro in many countries today. At its peak, eighteen countries adopted the Gold franc as their legal tender (or peg). Four of them (the founding members of the LMU: France, Belgium, Italy and Switzerland) agreed on a gold to silver conversion rate and minted gold and silver coins which were legal tender in all of them. They voluntarily limited their money supply by adopting a rule which forbade them to print more than 6 franc coins per capita . Europe (especially Germany and the United Kingdom) was gradually switching at the time to the gold standard. But the members of the Latin Monetary Union paid no attention to its emergence. They printed ever increasing quantities of gold and silver coins, which constituted legal tender across the Union. Smaller denomination (token) silver coins, minted in limited quantity, were legal tender only in the issuing country (because they had a lower silver content than the Union coins). The LMU had no single currency (akin to the euro). The national currencies of its member countries were at parity with each other. The cost of conversion was limited to an exchange commission of 1.25%.