Symbolism in the French Revolution somewhat by region and period. The tricolore flag is derived from the cockades used in the 1790s. These were circular rosette-like emblems attached to the hat. Camille Desmoulins asked his followers to wear green cockades on 12 July 1789. The Paris militia, formed on 13 July, adopted a blue and red cockade. Blue and red are the traditional colours of Paris, and they are used on the city's coat of arms. Cockades with various colour schemes were used during the storming of the Bastille on 14 July. The blue and red cockade was presented to King Louis XVI at the
Units of measurement in France before the French Revolution difference in salinity (i.e. the difference between distilled water and very good quality drinking water) is enough to explain this difference. The units in the following table are (except for the talent) calculated based on the kilogram definition of the "livre". Units of measurement in France before the French Revolution Before the French Revolution, which started in 1789, French units of measurement were based on the Carolingian system, introduced by the first Holy Roman Emperor Charlemagne which in turn were based on ancient Roman measures. Charlemagne brought a consistent system of measures across the entire empire. However, after his death,