8 results in English
Calculating Coptic Orthdox Easter
This manuscript deals with the calculation of Easter Sunday according to the Coptic calendar. Fixing this date each year governs much of the liturgical and devotional life of the Coptic Orthodox Church. The Coptic calendar begins in 284 AD, which is called Anno Martyrum (AM), or Year of the Martyrs. The first folio contains a table of the four seasons with their corresponding Coptic months and zodiacal signs. The following pages, some of which are torn or badly stained, provide instructions for calculating the movement of the moon and reconciling ...
Cosmography
Created in England in the late-12th century, this manuscript was intended to be a scientific textbook for monks. The manuscript is brief, at nine folios, and was designed as a compendium of cosmographical knowledge drawn from early Christian writers, such as Bede and Isidore, as well as the later Abbo of Fleury. Those writers, in turn, drew on classical sources, such as Pliny the Elder, for their knowledge but adapted it to be understood through the filter of Christianity. The 20 complex diagrams accompany and help to illustrate the texts ...
Contributed by Walters Art Museum
Collection of Texts on Mathematical Astronomy and the Natural Sciences
This manuscript is a collection of texts on mathematical astronomy and the natural sciences dating from early in the ninth century. The illuminations are mainly of astronomical content and are based on models from late antiquity. They include the occupations of the 12 months, the earliest surviving medieval illuminations of this type (folio 91 verso); an astronomical map (folio 113 verso); the constellations (folios 115 verso−121 recto); and the 12 winds (folio 139 recto). The manuscript was copied in Salzburg, apparently from a northern French exemplar, and was presumably ...
Contributed by Bavarian State Library
Encyclopedic Manuscript Containing Allegorical and Medical Drawings
In the Middle Ages, medicine was very much intertwined with astrology and other nonscientific superstitions. This manuscript on vellum, produced in southern Germany around 1410, contains pen and ink drawings with explanatory texts in German and Latin. The first drawing shows the earth and seven planets. It is followed by Zodiac-man, a naked man shown with the 12 signs of the zodiac, each relating to a specific part of the body. Next are four bloodletting charts of the human body. Such bleeding charts or calendars were widely used in this ...
Contributed by Library of Congress
Seasonal Almanac Based on the Coptic Calendar
The author of this work, Shaykh al-Islām Ahmad al-Bashtakī, lived in Bashtak near central Cairo. The work goes through the 13 months of the Coptic calendar: Tūt (Thout), Bāba (Paopi), Hātūr (Hathur), Koihak (Koiak), Tūba (Tobi), Imshīr (Meshir), Baremhāt (Paremhat), Barmūda (Paremoude), Bashons (Pashons), Bawna or Būna (Paoni), Ibīb (Epip), Misurī (Mesori), and the Days of Nasī (ayyām al-nasī; also known as the Little Month, Pi Kogi Enavot, or El Nasii). The work gives the corresponding months in the Roman and Persian calendars, notes the astrological significance of days, and ...
The Benefits from Knowing the Basics and Rules of Seafaring
This work is a collection of eight treatises related to the science of seafaring and navigation by Ibn Mājid al-Julfārī al-Sa‘dī, the most renowned Muslim navigator of the 15th century (9th century AH). It was originally assembled in 1490. The works are bound together in one large tome and include information about the Indian Ocean, the Red Sea, the Persian Gulf, the Arabian Sea, and other major bodies of water known to the author. The work meticulously lists and describes sea routes, harbors, and other points of interest to ...
Contributed by Library of Congress
The Book of Times
This is a manuscript copy of Kitāb al-Azmān (The book of times; also known as Kitāb al-Azmina) by Yuḥannā Ibn Māsawayh (died circa 857), the famous physician of the Abbasid era. The work belongs to the tradition of Islamic hemerology—the study of the calendar, especially with a view to discerning the auspiciousness of carrying out various actions at a given date or time. In his introduction, the author states: "The people of knowledge and philosophy and the physicians of Persia, India, and Rūm [Asia Minor], have said that the ...
Regimen of Health
Heinrich von Laufenberg (circa 1390–1460) was a cleric from the southwest German town of Freiburg, a prolific writer of prose and verse in both German and Latin, who is best known for his religious lyrics. His Regimen Sanitatis (Regimen of health) of 1429 is a medical-astronomical compendium of guidance to healthful living that stretches to more than 6,000 lines of metrical German. The work presents the reader with practical rules for healthy living concerning such matters as a balanced diet, phlebotomy (bloodletting, then a common treatment to prevent ...