4 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 ...
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 ...
Winds of the Four Directions
This oracle bone from around 1200 B.C. contains 24 characters in four groups in a vigorous and strong style, typical of the Bin group of diviners in the reign of Wu Ding (circa 1200-1189 B.C.). It records the gods of the four directions and of the four winds. The winds of the four directions reflect the spring and autumn equinoxes, the summer and winter solstices, and the changes of the four seasons. The four winds are the east wind, called Xie; the south wind, called Wei; the west ...
Contributed by National Library of China
On the Calculation of Numbers in the Science of Astronomy
Timbuktu, founded around 1100 as a commercial center for trade across the Sahara Desert, was also an important seat of Islamic learning from the 14th century onward. The libraries of Timbuktu contain many important manuscripts, in different styles of Arabic scripts, which were written and copied by Timbuktu’s scribes and scholars. These works constitute the city’s most famous and long-lasting contribution to Islamic and world civilization. This work (date unknown) explains mathematical calculations and their use in astronomy and astrology. The final portion of the manuscript is missing.