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Regarding the calculation of ancient currency to the diverse currencies of some modern nations, see GUILLAUME BUDÉ, On the As, Books V, joined with the breviary on the as; PASCASIUS GROSIPPUS, in literary paradoxes, p. 85 sq. The collection of NICOLAUS MAMERANUS, joined to LEONHARD VON PORTIS, On ancient monetary affairs, and JOHANN AQUILA, On the power and utility of coins, in treatises, Cologne, 1551, octavo. Tables of Roman and Greek numismatic affairs, recalled to Belgian, Gallic, Spanish, and Italian currency, Antwerp, 1616, octavo.
SEBASTIANO ERIZZO, using a pseudonym, or SEBASTIANO ECHINO, a Venetian, in a treatise published in Italian four times in Venice in the 16th century, titled: Discourses on the coins of the ancients, with an explanation of consular coins and medallions of the Roman Emperors, denied that ancient coins, which pass today under the name of numismata coins/medals, were in the place of currency and in use for commerce among the ancients: but indeed the same is certain, and AENEAS VICUS and LODOVICO SAVOT have abundantly proven the contrary: Cf. prolegomena §. 5. and CHARLES PATIN, History of coins, Chapter V, on the difference between currency and coin, p. 27 et seqq.