A mathematical paper from 1657 While reading the book My Numbers, My Friends by Paulo Ribenboim, I came across a reference to a paper on page 42 : "1657 Frénicle de Bessy. Solutio duorum problematum circa numeros cubos et quadratos. Bibliothèque Nationale de Paris." I'm looking for the above paper, either downloadable or purchasable copy. Any help will be greatly appreciated.

A quick Google search shows that the French National Library has this paper: < They do sell reproductions.

**Edit.** By now (Oct 2018), you can also view/download a scanned copy for free.