The Introduction to Immanuel ben Jacob Bonfils’ Tables for 1340

Immanuel ben Jacob Bonfils (fl. 1350) of Tarascon in southern France composed a set of planetary tables in Hebrew for 1340 and a treatise in Hebrew called ʿEreḵ ha-ḥilluf, an expression that refers to the equation of time. The contents of these tables have been treated elsewhere; this brief communication focuses on some textual peculiarities in the manuscripts of both the introduction (or canons) to the tables and the treatise, illustrated by the text and translation of a few selected passages.