Mathematical Treasure: Claude Irson’s Abrégé de l'arithmétique pratique et raisonnée

Claude Irson (1655–1690) was a 17th-century French mathematician and grammarian. He also worked as an accountant. Among the many books that he wrote can be found Abrégé de l'arithmétique pratique et raisonnée (Compendium of practical and reasoned arithmetic), published posthumously in 1695:

The first page of the table of contents:

A list of some of the author’s of other works and the first page of the text:

The copy owned by Bayerische StaatsBibliothek has been digitized for the Deutsche Digitale Bibliothek (German Digital Library).

Index to Mathematical Treasures