||Critical scholarly corrected edition of the responsa portion of Sefer ha-Yashar prepared from a manuscript and issued by the Mekize Nirdamim Society. Sefer ha-Yashar is the primary work of the Tosafot R. Jacob ben Meir Tam (Rabbenu Tam). The volume has three title pages. The first lists the books published by the Mekize Nirdamim Society and notes that this is the responsa of Rabbenu Tam; the second is a German title page, and the third is a Hebrew title page which informs that it has the corrections and notes of R. Ephraim Solomon Margoliouth and the glosses of R. Shraga Rosenthal, Av Bet Din, Breslau. There is an introduction (pp. vii-x) from R. Rosenthal, and the text with 103 responsa. Many of the responsa, covering the entire Shulhan Arukh, are multi-part, that is, they are in response to several queries from one source. R. Tam’s correspondents include the greatest names in medieval Jewry. The volume concludes with errata ( and two indexes, the first according to the order of entries, the second according to the order of the Shulhan Arukh.
Rabbenu Tam (R. Jacob ben Meir Tam, c. 1100–1171) was the son of R. Meir ben Samuel and the grandson of Rashi. He is the foremost of the Tosafists and was the leading Talmudist of the twelve century. R. Tam lived in Ramerupt, France where he engaged in moneylending and viticulture, typical occupations of the Jews there at that time. During the Second Crusade he was attacked by Crusaders who were passing through, and was miraculously saved from death (1146). After this experience R. Tam left Ramerupt. He was recognized by all contemporary scholars, even by those in remote places, as the greatest scholar of the generation. R. Abraham ibn Daud of Spain, and Abraham b. Isaac and Zerahiah ha-Levi of Provence refer to him with great esteem, while the scholars of southern Italy, some his senior in years, submitted their halakhic problems to him. Pupils came to his bet midrash from as far away as Bohemia and Russia, and took R. Tam's teachings back with them on their return to these lands. He won this great renown although he never moved or traveled far from his place of residence in northern France.
Added t.p.: Responsen des Rabbenu Tam im Sepher Hajascher.
Nach einer Handschrift von neuem herausgegeben und mit kritischen Noten versehen von Dr. F. Rosenthal, Rabbiner in Breslau...