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orna

Compare the Roman urna.

A largish unit of liquid capacity used for wine (and probably also a barrel size) in the lands on the eastern edge of the Adriatic Sea. In Istria this link goes to a new page , 16ᵗʰ century, about 57 liters.

In the 19ᵗʰ century Doursther reported the name in use in Illyria this link goes to a new page , as did others, shown in the table. Apparently then the urna was most in use in the district of Spilimbergo in the province of Friuli, and the district of Pordenone in the province of Venezia.

The earliest value, and those in the two major cities on which Doursther reported, are roughly half that of the other 19ᵗʰ century values. What happened?

Locale	Equivalents	Liters	Sources
Anduins	= 192 bozze	160.4365	G43; Z125
Castelnovo	= 216 bozze	135.0150	G43; Z137
Cornino	= 196 bozze	125.6775	G43; Z145
Fiume	= 32 boccali	53.90	D137
Isola Morosina	= 102 boccali	129.1420	G47
Latisana	= 72 boccali	103.0070	G43; Z151
Portogruaro	= 96 boccali	94.6042	G44
Sacile	= 160 boccali	212.1675	G44; Z166
Spilimbergo	= 84 boccali	150.4365	G44; Z169
Trento	= 75 mosse	78.4957	G49
Trieste	= 40 boccali	56.60	D139
	the old measure, = 36 boccali	D→65.66; G→65.6310	G49; D139
	orna of oil = 5½ caffisi		D139
Valvasone	= 96 boccali	132.3600	G44; Z176
Vidulis	= 168 bozze	143.2100	G45; Z181
S. Vito	= 84 boccali	97.4043	G44; Z182

D Doursther (1840).

G Girolamo Antonio Gennari.
Ragguagli delle antiche misure lineri, di superficie, di capacita e di peso del Regbo Lombardi-Veneto, degli altri Paesi che con detto Regnocostituivano quello d'Italia…
Venice: Tipografia di Giovambatists Andreola, 1855.

Z Carlo Zamara.
Manuale di Calcoli fatti pei Ragguagli Sulle Misure e Pesi del Regno Lombardo-Veneto e di Vienna …
Padova: coi tipt del Seminario, 1847. See index pages 121-122.

sources

L'orna de vin de Cavo d'Istria sono sechii 6 a la sua mesura e a mesure da Venesia sono sechii 5 lire 1.

The orna of wine of Istria is 6 secchii by their measure, and according to the measure of Venice is 5 secchii 1 lire.

Bartolommeo di Pasi.
Tariffa de' pesi e mesure con gratia et privilegio.
Venice: 1503.
As quoted in Edler, page 197.

Taking the 16ᵗʰ century Venetian secchio at 10.8 liters, the Istryian orna would be 56.7 L.