English: Woodcut dated 1800 illustrating the new decimal units which became the legal norm in France on 4 November 1800, five years after the the metrical system was first introduced. In the captions, each one of these six new units is followed by the old French unit in brackets: the litre, the gram, the metre, the are (100 square metres), the franc, and the stère (1 cubic metre of wood).