21·28 inches cubed = 9639 c.i. = 34·73 gallons.
Now what water or wine measure would be produced from the Cargo, decreased in wheat-water ratio?
Dividing the measure of the cargo by 1·22 we have:
34·73/1·22 = 28·46 gallons.
A fluid measure of this capacity is not in use at Marseilles, but we find its half, almost exactly, in the Mieirolo = 14·19 gallons, a wine and oil measure used extensively in Mediterranean ports.
The word Mieirolo, in which mié means half, corresponds to the name of the first in an Italian series of wine-measures:
Mezzaruola, Terzaruola, Quartaruola, fractions of a 28-gallon measure now apparently obsolete.
The standard of the Mieirolo is now at—
| Marseilles, | 64·384 | litres | = | 14·19 | gallons. |
| Tripoli, | 64·386 | „ | „ | „ | |
| Tunis, | 63·347 | „ | 13·97 | „ | |
| Spain, | 64·55 | „ | 14·23 | „ |
One-fourth of the Mieirolo, or one-eighth of the obsolete wine-cargo, is the Escandau, equal to the Spanish arroba (a word meaning ‘quarter’), and containing, at the present Marseilles standard, 16·096 litres = 3·54 gallons. To this Escandau or standard corresponds, in water-wheat ratio, the Panau = 4·34 gallons, 1/8 of the Cargo = 4·34 bushels or 34·73 gallons.