Eliezer Beilin. Sepher Ivronoth [astronomy and calculations of intercalation and the Jewish calendar]
AUCTION 80 |
Thursday, March 28th,
2019 at 1:00 PM
The Valmadonna Trust Library: Further Selections from the Historic Collection. * Hebrew Printing in America. * Graphic & Ceremonial Art
Lot 80
(SCIENCES)
Eliezer Beilin. Sepher Ivronoth [astronomy and calculations of intercalation and the Jewish calendar]
Offenbach: Israel ben Moses 1722
Est: $4,000 - $6,000
<<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 of the Library of Congress (1991) pp. 197-8.