The object of this study is a list of twenty-four Egyptian days in Yiddish discovered at the end of a Hebrew miscellany from medieval Ashkenaz, preserved in the Basel Universitätsbibliothek. Egyptian days are inauspicious days for bloodletting; these are listed according to the Julian calendar and sometimes identified by saint names and feast days. The list is edited and translated into English. Dates and variants of these Egyptian days are then compared with those of the only other known list of its kind, found in the earliest dated astro-medical fragment in Old Western Yiddish, from 1396–1397. A tabular comparison and descriptive commentary of the names and dates in both lists follows. Preceding this analysis, the status and knowledge of Jewish physicians in medieval Ashkenaz is addressed, as well as a brief description of Ms R IV 2, revealing its rich content and some of its codicological and paleographical characteristics.

本研究的目的是在巴塞尔大学图书馆保存的中世纪阿什肯纳兹希伯来文杂书末尾发现的意第绪语中的埃及二十四天清单。埃及的日子是不吉利的放血日子；这些是根据儒略历列出的，有时以圣人的名字和节日来标识。该列表已编辑并翻译成英文。然后将这些埃及日子的日期和变体与唯一其他已知的同类清单中的日期和变体进行比较，这些清单见于 1396 年至 1397 年的旧西部意第绪语中最早的天文医学片段。两个列表中的名称和日期的表格比较和描述性评论如下。在此分析之前，讨论了中世纪阿什肯纳兹犹太医生的地位和知识，以及对 R IV 2 女士的简要描述，