Units of measurement in France before the French Revolution 4 parts in one million) than the "pied" used in France. According to the law of 19 Frimaire An VIII (December 10, 1799), Traditionally, the French pound ("livre") was defined as the mass of exactly of a French cubic foot of water. When the kilogram was defined, the knowledge that a "pied du Roi cube" filled with water masses exactly 70 French pounds was apparently lost. According to the traditional (cubic foot) definition, one "livre" would have been about 489.675 grams. According to the kilogramme definition, one "livre" was about 489.506 grammes. The difference is about 0.035%. However, a small
Pied heron Pied heron The pied heron ("Egretta picata"), also known as the pied egret is a bird found in coastal and subcoastal areas of monsoonal northern Australia as well as some parts of Wallacea and New Guinea. The species was originally described by ornithologist John Gould in 1845. Recent taxonomists put this species in the genus "Egretta". There are no recognised subspecies. It is a small heron, 43–55 cm long, with dark slaty wings, body, and crested head, with a white throat and neck. The appearance is similar to the white-necked heron. Males (247–280 g) are heavier than females (225–242 g),