A remarkable copy of this treatise on human reproduction by Pseudo Albertus Magnus, bound with a 17-page manuscript containing a astronomical text on the principles of chronological computation, apparently for astrological purposes, doubtless inspired by the printed text and an intriguing example of manuscript and print at the time of their transition. Secreta Mulierum (On women's secrets) was composed in the late 13th or early 14th century by an unknown disciple of Albertus Magnus, the most learned and prolific writer of the Middle Ages. Although scholars proposed the names of Thomas of Brabant or Henry of Saxony, the problem of authorship remains unsolved. The main text is accompanied by, and at times mixed with, a commentary, whose attribution is also debated. Relying on ancient and medieval writings, Pseudo-Albert discusses various aspects of reproduction, including the generation of the embryo, the formation and development of the fetus, the signs of conception, virginity, chastity, defects of the womb, impediments to conception and others. In the introduction, he states that his style will be partly philosophical, partly medical, just as seems to fit the material . By "philosophical" he refers to natural philosophy, or natural science, concerned with the study of the world and cosmos. Although Pseudo-Albert raises a number of medical topics nature of the menses, birth complications, gestation his knowledge of medicine is limited. On the other hand, the discussion on natural philosophy is complex and it explores in detail the relationship between human nature, reproduction and celestial bodies. Crucially, the author describes the effects of astrological influence on the developing fetus, also showing how the sphere of the fixed stars confers different virtues: Saturn gives the ability to reason, the Sun to remember, Jupiter grants generosity, Venus causes the separation of hands and feet, the Moon completes the skin. Vincent of Beauvais and Michael Scot may note some of the celestial effects, but pseudo-Albert addresses himself seriously to the problem of how they come about, and this effort forms the major thrust of his writing. Although the De secretis mulierum names women's secrets as its subject matter, if we weigh the length and the level of discourse we can almost consider this to be an astrological treatise. (Lemay) Renaissance scholars commonly practiced astrology, and the manuscript pages at the end suggest that the early owner of this volume was particularly involved. The text is a Computus Ecclesiasticus , which discusses solar and lunar cycles in relation to religious festivities and mobile feasts of the ecclesiastical calendar (Julian). In addition to basic knowledge (e.g. what a lunar cycle is), it provides precise instructions on how to calculate (computare) dates of feast days, such as dies dominicales (Sundays). Interestingly, it is arranged around metric formulas that were traditionally used to memorise calculations: here these are underlined in red, and each word corresponds to a number or provides a letter which will be used in the computations. For example, we find Sed, Quinque, Tred, Ambo, Decem, Doc, Septem, Quind, Quater, Dud, Jota, Novem, Sept VI, Quard , used to calculate the Golden number (a number from 1 to 19 which designate the year within the Metonic cycle of the moon phases). We also find: Bonus erat homo Katho, nobilis quoque Seno , which was employed to calculate the insertion of a leap day, week or year into a calendar and the second part of the manuscript is mostly concerned with this. Learning computus , the science of calculating times and dates, was fundamental for astrologers. This discipline, used in conjunction with astrolabes to predict the position of the planets (mentioned in the manuscript) and astronomical tables, was used to cast horoscopes, exactly like the one that we find at the beginning of the manuscript. The text was composed by two writers between the end of the 15th and beginning of the 16th century: in a few places, the second updates and annotates the first, including adding ab anno 1500 and 1501 to his comments.
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