65 80 (SCIENCES) Eliezer Beilin. Sepher Ivronoth [astronomy and calculations of intercalation and the Jewish calendar]. Title within architectural arch featuring Moses and Aaron, with cherubs flanking a zodiac sphere. Numerous mathematical tables, spherical charts and illustrations. Woodcut illustrations of hand palms on ff. 23v. and 24r. Leaf 25 with 2-piece volvelle affixed on recto and 3-piece volvelle on verso. Leaf 28 with 3-piece volvelle affixed on recto and 3-piece volvelle on verso. Single sphere tipped between ff.36v and 37r. A rare copy, complete with all volvelles. ff. (2), 40. Browned. Modern boards. Sm. 4to. [Vinograd, Offenbach 63.] Offenbach, Israel ben Moses,1722. $4000 - $6000 ❧ A RARE COPY, COMPLETE WITH ALL VOLVELLES, FULLY ASSEMBLED, IN THEIR ORIGINAL STATE AND IN FINE CONDITION. This edition is particularly attractive, with fine illustrations and volvelles necessary for calculations. A volvelle, or wheel chart is a type of slide chart, a paper construction with rotating parts. It is considered an early example of a paper analog computer. The Jewish calendar is lunisolar - while the months are reckoned by the moon, the years pass based upon the sun. In order to keep the two systems in sync with each other in accordance with Jewish law, astronomic and Halachic expertise is required. Sepher Ibronoth was prepared as a manual “to help an individual fulfill the commandments.” See A. J. Karp, From the Ends of the Earth: Judaic Treasures 81 (SAMUEL, RABBI). Rationes breves magni Rabi Samuelis, Judei nati, sed de Judaismo ad fides Catholicam converti. [“A Brief Account of the Great Rabbi Samuel, Born Jewish, but Converted from Judaism to the Catholic Faith.”] Woodcut of scholar and students on title. Gothic type. Red lettering in initials and elsewhere applied by hand. Ample margins. Some Latin marginalia. ff. (24). 36 lines per page. Stamp on title, some light wear. Modern, emerald and black morocco with gilt. 8vo [BMC I, 279; Goff S110] Cologne, Heinrich Quentell,1493. $3000 - $5000 ❧ Later edition of “Epistola contra Judaeorum errores” a widely- disseminated anti-Judaic tract. Supposedly composed in Arabic by a Moroccan Jew (“Samuel Marochitanus”) at the beginning of the 11th-century and translated into Latin by the Spanish Dominican Alphonsus Bonihominis in the 14th century, but now considered to have been composed by the latter. The first printed edition appeared in 1474. See Studies in Bibliography and Booklore, Vol. V (1961) p. 89, no. 67; EJ Vol. II, 607. of the Library of Congress (1991) pp. 197-8.