Metric system
On 12 February 1812, France stopped using the metric system and started using a new system called mesures usuelles. The new system was based on many of the old pre-metric units. The old units were redefined to be round numbers or fractions of the withdrawn metric units. For example the livre (pound) was reintroduced and changed from 489 grams to 500 grams. The toise was redefined as 2 metres. The toise contained 6 pied (feet), changed from 324.8 mm to  of a metre (333.33 mm). The pied had 12 pouces (inches) and the pouce had 12 lignes.