Sefer HaEvronot for the calculation of moladot (new moons) and the fundamentals of the Hebrew Calendar. Rare and impressive manuscript of the eighteenth century. [72] pages, 19 cm. Ashkenazi manuscript, thin and roundish, very fine with added tables, illustrations, shape of a palm and further astrological calculations. From the book’s contents, it appears that it is Sefer HaEvronot of Rabbi Eliezer Blin. An important book about the calculation of the moladot, calendar of the year and also a calculation of the festivals. First published in Lublin in the year 5375 (1605). According to the content and what is registered in the manuscript on the non- Hebrew title page, it appears that the edition before us is a copy of the manuscript of the second edition of the book which was published in Cracow in the year 5400 (1640). Contains important comments by Rabbi David of Lomaz. There has not been found a printed copy of it throughout the world. Content of the manuscript: Introduction by Rabbi David of Lomez. Opening words by MaRaBlin (2-4); for calculating the moladot (6-8); Mozenei Zedek (9-11); the full months and the missing months (11b. -12b); the four beasts (13a -13b); determining the years (14a-14b); 7 gates (15a-15b); circle of Rav Nachshon (16a -16b); calendar of Roshei Hodashim (beginning of the months); (17a-18b), 14 calendars-14 gates (19a-20a); to know the tekufot (periods) – advantages of the tekufot (20b -22b); to know advantage from Creation of World (23a); calendars of the tekufa (23b); calendar of HaYad and commentary on the Yad (24a-25a); calendar of HaZahav (attributed to Rabbi Saadia Gaon] (26a -27a); Igul HaTekufa (rounding-up the Tekufa); (27b-28b) Avin Tavin (29a-31a); 7 planets (32a); Tekufot Rav Ada (32b); Luach HaChagot (33a-36b). Old cardboard binding. In very good condition.