The greatest measure among the Romans of liquid things, was the culeus, or culleus, containing 20 amphoræ. A culeus also contains 40 urns, the urn being half the amphora.
The amphora is otherwise called quadrantal, ceramium, cadus, and μετρητὴς Ιταλικὸς. The urna is the 40th part of the culeus, and the half of the amphora.
The congius was the 8th part of the amphora, and the 4th of the urna: it contained 6 sextarii. The congius in English measure contains 207·0676 solid inches, that is, 7 pints 4·942 solid inches.
The sextarius urbicus was the 6th part of the congius. This sextarius is divided into two heminæ, or cotylæ. It is also divided into four quartarii which are the half of a hemina. A sextarius is also divided into 8 acetabula. The parts of the sextarius were like those of the as, uncia, sextans, quadrans, triens, quincunx, semis, septunx, bes, dodrans, dextans, deunx, by which words a certain number of cyathi is meant, a cyathus being the 12th part of the sextarius. The sextarius castrensis was double of the urbicus.
Hemina, the half of the sextarius, contains 2 quartarii, 4 acetabula, 6 cyathi, 24 ligulæ.
Quartarius, as we have said, was the fourth part of the sextarius.
The acetabulum was the half of the quartarius.
Cyathus was the 12th part of the sextarius.
The ligula, or lingua, contained one 48th of the sextarius.
Cochlear, cochleare, and cochlearium, often denote a spoon, and sometimes a measure equal to the ligula.