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cántara

In Ifni and Spain, 20ᵗʰ century, a unit of capacity used for wine:

In Ifni, = 16 liters.
In Spain, approximately 16.24 liters. This is very close to the 19ᵗʰ century value in Madrid and Toledo. In some localities its place was taken by an arroba for liquids.

United Nations, 1966.
Technical Factors..., 1972, page 132.

Before 1801, the cántara was defined as the volume of 34 libras of water taken from the Tagus River as it flowed by Toledo.

The table below shows values in the mid-19th century of the cántara and cántaro in the parts of Spain that used them. A media cántara is half a cántara; that this distinction was made in the source probably indicates that that is the form in which the unit was actually used in that locality, so we have preserved it. The media arrobas for liquids have been added to show that these arrobas are essentially local equivalents to a media cántara. Notice that in many provinces the cántara was not used.

Province	Name of unit	Size,¹ liters
Alava	cántara	16.365
Alicante	cántaro	11.55
Ávila	media cántara	7.96
Burgos	media cántara	7.05
Castellón	cántaro	11.27
Coruña	cántara de vino	15.58
Coruña	cántara de aguardiente	16.43
Huelva	(used the media arroba for liquids, which was very close to values for the media cántara)	7.89
Huesca	cántaro	9.98
Jaèn	(used the media arroba for wine, very close to values for the media cántara)	8.02
León	media cántara	7.92
Lèrida	cántara, for wine	11.38
Logroño	cántara	16.04
Madrid	(media arroba for liquids)	8.15
Málaga	(media arroba for liquids)	8.33
Murcia	(media arroba for wine)	7.80
Navarra	cántara	11.77
Orense	cántara	15.96
Oviedo	cántara	18.41
Palencia	media cántara	7.88
Pontevedra	(used the medio cañado for liquids)	16.35
Salamanca	medio cántaro	7.99
Santander	media cántara	7.90
Segóvia	(media arroba for liquids)	8
Sevilla	(arroba for liquids)	15.66
Soria	media cántara	7.90
Teruel	cántaro	10.66
Toledo	media cántara	8.12
Valencia	cántaro of wine	10.77
Valladolid	media cántara	7.82
Zamora	medio cántaro	7.98
Zaragoza	cántaro of wine	9.91

1. Dirección General del Instituto Geográfico y Estadístico.
Equivalencias entre las Pesas y Medidas Usadas Antiguamente en las Diversas Provincias de España y las Legales del Sistema Métrico-Decimal.
Publicadas de Real Orden.
Madrid: Imprenta de la Dirección General del Instituto Geográfica y Estadístico, 1886.

examples

Two cantaras of water (21.28 quarts) are added....

Claude I. Dawson.
Curing and Packing Valencia Raisins.
U.S. Dept. of Commerce, Bureau of Foreign and Domestic Commerce.
Daily Consular and Trade Reports.
Nos. 75-151; Volume 2; April, May and June 1913.
Washington: U.S.G.P.O., 1913.
Page 210. Report 85, April 12, 1913.

21.28 U.S. liquid quarts is about 20.14 liters. Whether the greater size is due to location, date or author error is unknown.