Bernard Fournioux, A corn measure of a local type in Périgord. As a mirror of the activity of a region where it was used as a tool, the corn measure of La Faye is a palpable sign that remains of a complex and irrational mediaeval system of measurement. It is characteristic of the various centres radiating out from manorial jurisdictions that were so frequently found on the economic horizon of Périgord in the Middle Ages. This article seeks to provide a definition of a unit of weight, as a measurement and in its geographical and chronological dimensions. Such studies will perhaps lead to drawing up the conversion tables that are so badly needed by the specialists in mediaeval history.Instrument et reflet d'une activité locale, la mesure de ...