What kind of legal system does France use?
French law is based in some respects on Roman law and is codified. That means that, unlike in the U.S. or England, precedent is relatively unimportant. It's the codified 'rule-book' that really counts. The *basis* of French law dates from the Napoleonic period and is often referred to as the "Code Napoleon" though some of it wasn't fully collated till 1816.
A feudal system in use is France in the 1770s that had been in use in the middle ages is called what?
The Metric system was implemented in France, under the revolution, with the aim of creating an universal, coherent and rational (from a scientific point of view) system of measurements. Nowadays, only three countries do not use the international standard of units: Burma, Liberia and the US (although scientists in those countries do use it).
The Babylonian legal system made great use of written agreements and contracts. Basically it's close to what we have now. They had lawyers for arbitration and a court system. Legal documents were pressed in clay, signed and a duplicate overlayed in more clay with the same document, making the first a safe duplicate!