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orcio

In Florence, Italy, at least as early as the 15ᵗʰ century – 19ᵗʰ century, a unit of liquid capacity used for oil, = 16 fiaschi = 32 boccali = 64 mezzette = 128 quartucci, about 33.4 liters (taking the Florentine fiasco of oil as 2.089 liters). Chiarini says it weighs 85 libbre net weight; Doursther says 120 (gross?). Taking the density of olive oil at 918 grams per liter, 33.4 liters would have a mass of 30661 grams. Taking the Florentine libbra as 339.55 grams, an orcio of oil would weigh 90.3 libbre, which agrees pretty well with Chiarini.

Doursther, (1840) page 46.

sources

Olio vi [in Florence] si vende a orcia: che uno orcio è uno barile e tiene 32 metadelle e questo barile pesa libbre octantacinque necte.

[In Florence] oil is sold by the orcia: 1 orcio is a barile and contains 32 metadelle and this barile weighs 85 libbre net weight.

Chiarini, 1481.