264 - Israeli, I.

Israeli, I. Liber Jesod Olam, or The Foundation of the World, a most celebrated work on astronomy. B. Goldberg & L. Rosenkrantz have re-edited the manuscript, emended the text, added notes, and provided a vernacular abridged version. 2 vols. in 1. Berlin 1846–48. Small 4°. With 4 plates and several text illustrations. 4 leaves, 48, 2 leaves, 42 pp., 6 leaves, XXVI, XXXVIII pp., 60 leaves. Contemporary library binding (shows signs of wear). Isaac Israeli wrote the work in 1310 in Toledo. - “The book ‘Yesod Olam,’ i.e., Foundation of the World, sets itself the task of presenting the Jewish calendar in its entirety...” (D. Cassel in the introduction). Divided into five sections, it covers mathematical theorems, a description of the world system, the movements of the sun and moon, the Jewish calendar system, tables, and instructions for use. Main text in Hebrew, foreword in German. - Binding joints broken, front joint repaired with paper strips, title pages slightly foxed and browned at the edges, edges browned throughout, some pages slightly more browned, a few pages with notes in ink, the tables slightly stained.