once [French]

In France, various units of mass, the principal subdivision of the livre :

late 8^th century – mid 14^th century, the once esterlin = 1/12 of the livre esterlin, about 30.6 grams.
12^th century – late 18^th century, the once poids de marc = 1/16 of the livre poids de marc, at the standard of Paris about 30.6 grams.
1800 – 1812, the once métrique, = 100 grams.
1812 – 1840, the once usuelle, = 31.250 grams.

2

In Nice, France, a unit of length, = 1/12 palme or pan, about 21.833 millimeters.

Doursther, page 369.

In Cahors, France, a unit of land area, a seed measure based on being 1/16 boisseau, about 19.95 square meters.

Doursther, page 369.