Until now, I always assumed the metric system was introduced in Germany with its unification in 1871. Looking it up on Wikipedia, I read that the 2nd Reich adopted the metric system on 1 January 1872, but how do I explain its earlier introduction in Baden on the eve of the Franco-Prussian War in 1870?
The poster illustrates that, up to 1870, technical exchange and trade between German territories were hampered by different foot lengths. In fact, the foot varied from a meager 0.25 m in the Duchy of Hesse-Darmstadt to an enormous 0.3161 m in the Austrian Empire, with the English foot of 0.3048 m in between.
The poster illustrates that, up to 1870, technical exchange and trade between German territories were hampered by different foot lengths. In fact, the foot varied from a meager 0.25 m in the Duchy of Hesse-Darmstadt to an enormous 0.3161 m in the Austrian Empire, with the English foot of 0.3048 m in between.
The foot in the Great Duchy of Baden measured exactly 0.3 m. Both Hesse's and Baden's feet are a clear deference to Napoleon's Rheinbund, making the lengths easily convertible into the meter France had introduced as early as 1799.
Other European countries adopted the metric system well before Germany, like the Benelux (Belgium, Luxembourg) in 1820, Switzerland in 1835, and Italy in 1861 following its unification. The UK is still in the process of changing over to the metric system, and the US Congress passed a Metric Conversion Act as late as 1975, with apparently no changes so far in the daily life of the US citizen. The Wikipedia page gives a lot of anecdotal information about the history of the metric system.
The metric system is not without flaws. I do not mean that the statement on the poster, one meter* being the 1/40 000 000 part of the Earth's circumference, was wrong from the start, but that the basic unit of weight is the kilogram, i.e., a metric quantity with a prefix. This is because the initial French system retained specific, sometimes traditional, names for the new metric quantities. The basic unit of weight (today defined as mass) was called the grave, and one-thousandth of it was the gram. Since grave sounded too aristocratic, the name was abandoned during the French Revolution.
Other European countries adopted the metric system well before Germany, like the Benelux (Belgium, Luxembourg) in 1820, Switzerland in 1835, and Italy in 1861 following its unification. The UK is still in the process of changing over to the metric system, and the US Congress passed a Metric Conversion Act as late as 1975, with apparently no changes so far in the daily life of the US citizen. The Wikipedia page gives a lot of anecdotal information about the history of the metric system.
The metric system is not without flaws. I do not mean that the statement on the poster, one meter* being the 1/40 000 000 part of the Earth's circumference, was wrong from the start, but that the basic unit of weight is the kilogram, i.e., a metric quantity with a prefix. This is because the initial French system retained specific, sometimes traditional, names for the new metric quantities. The basic unit of weight (today defined as mass) was called the grave, and one-thousandth of it was the gram. Since grave sounded too aristocratic, the name was abandoned during the French Revolution.
* Since 1983, one meter is defined as the distance light will travel in a vacuum during 1/299 792 458 seconds
The poster also uses traditional names for the new lengths in German. One centimeter is called Neuzoll (new inch), ten meters are a decameter, or a Kette (chain), and one kilometer is named Wegstrecke (length of way or path). These names never entered everyday use.
The poster also uses traditional names for the new lengths in German. One centimeter is called Neuzoll (new inch), ten meters are a decameter, or a Kette (chain), and one kilometer is named Wegstrecke (length of way or path). These names never entered everyday use.
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