First edition of an early attempt to establish a moderate and lawful interest rate for money lending, by the French Protestant Claude De Saumaise, successor to Joseph Scaliger at Leiden University. With a 93-page index of classical sources listing authors and subjects in Greek and Latin, and a discourse on ancient coinage. Based on one of De Saumaise's earlier works, the shorter tract De Usuris, first published one year earlier.
A very good copy with generous margins and only an occasional minor marginal worm hole. An influential Elzevier publication on usury, interest rates and ancient coinage. Rahir 483; Willems 488; for the author: NBG XLIII, col. 363.