Nechmad VeNayim, Chochmat Hatechunah, Kiddush Hachodesh and the measurement of the Stars, by Rabbi David Ganz. Yasnitz. 5503 [1743]. Astronomy Drawings. Single edition. 82 leaves, 19.5 cm The author, Rabbi David Ganz, 5301 [1541-1613] was the student of Rabbi Moshe Isserles – HaRama and of the Maharal of Prague. He was friendly with the great astronomer of his period, Kaplerand Ticho Braha. In this volume the first description is in Hebrew, of the approach of Kupernikos. Along the length of the leaves of the book are printed astronomy drawings. As with many copies, there is no introduction in Latin. Semi leather old binding. Time related stains. In very good condition.