Abū aṣ‐Ṣalt Umayya ibn ʿAbd al‐ʿAzīz ibn Abī aṣ‐Ṣalt ad‐Dānī al‐Andalusī () (October 23, 1134), known in Latin as Albuzale, was an Andalusian-

Arab The Arabs (singular: Arab; singular ar, عَرَبِيٌّ, DIN 31635: , , plural ar, عَرَب, DIN 31635: , Arabic pronunciation: ), also known as the Arab people, are an ethnic group mainly inhabiting the Arab world in Western Asia, ...

polymath A polymath ( el, πολυμαθής, , "having learned much"; la, homo universalis, "universal human") is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific pro ...

who wrote about

pharmacology Pharmacology is a branch of medicine, biology and pharmaceutical sciences concerned with drug or medication action, where a drug may be defined as any artificial, natural, or endogenous (from within the body) molecule which exerts a biochemica ...

geometry Geometry (; ) is, with arithmetic, one of the oldest branches of mathematics. It is concerned with properties of space such as the distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is c ...

Aristotelian physics Aristotelian physics is the form of natural science described in the works of the Greek philosopher Aristotle (384–322 BC). In his work ''Physics'', Aristotle intended to establish general principles of change that govern all natural bodies, b ...

, and

astronomy Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, g ...

. His works on

astronomical Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxi ...

instruments were read both in the Islamic world and Europe. He also occasionally traveled to

Palermo Palermo ( , ; scn, Palermu , locally also or ) is a city in southern Italy, the capital of both the autonomous region of Sicily and the Metropolitan City of Palermo, the city's surrounding metropolitan province. The city is noted for its ...

and worked in the court of

Roger I of Sicily Roger I ( it, Ruggero I, Arabic: ''رُجار'', ''Rujār''; Maltese: ''Ruġġieru'', – 22 June 1101), nicknamed Roger Bosso and The Great, was a Norman nobleman who became the first Count of Sicily from 1071 to 1101. He was a member of the ...

as a visiting

physician A physician (American English), medical practitioner (Commonwealth English), medical doctor, or simply doctor, is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through th ...

. He became well known in Europe through translations of his works made in the Iberian Peninsula and in southern France. He is also credited with introducing

Andalusi music Andalusi classical music ( ar, طرب أندلسي, ṭarab ʾandalusī; es, música andalusí), also called Andalusi music or Arab-Andalusian music, is a genre of music originally developed in al-Andalus by the Muslim population of the region a ...

to Tunis, which later led to the development of the Tunisian

ma'luf ''Ma'luf'' ( ar, مألوف, acquainted, familiar ''Ma'lūf'') is a genre of art music in the Andalusian classical music tradition of Algeria, Libya, and Tunisia. It is of Iberian origin and was introduced to the Maghreb The Maghreb (; a ...

Life

Abu as-Salt was born in

Dénia Dénia ( es, Denia) is a historical coastal city in the province of Alicante, Spain, on the Costa Blanca halfway between Alicante and Valencia, and the capital and judicial seat of the ''comarca'' of Marina Alta. Denia's historical heritage ...

al-Andalus Al-Andalus translit. ; an, al-Andalus; ast, al-Ándalus; eu, al-Andalus; ber, ⴰⵏⴷⴰⵍⵓⵙ, label= Berber, translit=Andalus; ca, al-Àndalus; gl, al-Andalus; oc, Al Andalús; pt, al-Ândalus; es, al-Ándalus () was the M ...

. After the death of his father while he was a child, he became a student of al‐Waqqashi (10171095) of Toledo (a colleague of Abū Ishāq Ibrāhīm az-Zarqālī). Upon completing his mathematical education in

Seville Seville (; es, Sevilla, ) is the capital and largest city of the Spanish autonomous community of Andalusia and the province of Seville. It is situated on the lower reaches of the River Guadalquivir, in the southwest of the Iberian Penins ...

, and because of the continuing conflicts during the

reconquista The ' ( Spanish, Portuguese and Galician for "reconquest") is a historiographical construction describing the 781-year period in the history of the Iberian Peninsula between the Umayyad conquest of Hispania in 711 and the fall of the N ...

, he set out with his family to

Alexandria Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...

and then

Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, ) is the capital of Egypt and its largest city, home to 10 million people. It is also part of the largest urban agglomeration in Africa, the Arab world and the Middle East: The Greater Cairo metr ...

in 1096. In Cairo, he entered the service of the

Fatimid The Fatimid Caliphate was an Ismaili Shi'a caliphate extant from the tenth to the twelfth centuries AD. Spanning a large area of North Africa, it ranged from the Atlantic Ocean in the west to the Red Sea in the east. The Fatimids, a dyna ...

ruler Abū Tamīm Ma'add al-Mustanṣir bi-llāh and the

Vizier A vizier (; ar, وزير, wazīr; fa, وزیر, vazīr), or wazir, is a high-ranking political advisor or minister in the near east. The Abbasid caliphs gave the title ''wazir'' to a minister formerly called '' katib'' (secretary), who was ...

Al-Afdal Shahanshah Al-Afdal Shahanshah ( ar, الأفضل شاهنشاه, al-Afḍal Shāhanshāh; la, Lavendalius/Elafdalio; 1066 – 11 December 1121), born Abu al-Qasim Shahanshah bin Badr al-Jamali was a vizier of the Fatimid caliphs of Egypt. According to a ...

. His service continued until 1108, when, according to Ibn Abī Uṣaybiʿa, his attempt to retrieve a very large

Felucca A felucca ( ar, فلوكة, falawaka, possibly originally from Greek , ) is a traditional wooden sailing boat used in the eastern Mediterranean—including around Malta and Tunisia—in Egypt and Sudan (particularly along the Nile and in protect ...

laden with copper, that had capsized in the

Nile The Nile, , Bohairic , lg, Kiira , Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the longest riv ...

, ended in failure. Abu as-Salt had built a mechanical tool to retrieve the Felucca, and was close to success when the machine's

silk Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from th ...

rope A rope is a group of yarns, plies, fibres, or strands that are twisted or braided together into a larger and stronger form. Ropes have tensile strength and so can be used for dragging and lifting. Rope is thicker and stronger than similarl ...

s fractured. The Vizier Al-Afdal ordered Abu as-Salt's arrest, and he was imprisoned for more than three years, only to be released in 1112. Abu al-Salt then left

Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a List of transcontinental countries, transcontinental country spanning the North Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via a land bridg ...

for

Mahdia Mahdia ( ar, المهدية ') is a Tunisian coastal city with 62,189 inhabitants, south of Monastir and southeast of Sousse. Mahdia is a provincial centre north of Sfax. It is important for the associated fish-processing industry, as well as w ...

Tunisia ) , image_map = Tunisia location (orthographic projection).svg , map_caption = Location of Tunisia in northern Africa , image_map2 = , capital = Tunis , largest_city = capital , ...

, the capital of the

Zirids The Zirid dynasty ( ar, الزيريون, translit=az-zīriyyūn), Banu Ziri ( ar, بنو زيري, translit=banū zīrī), or the Zirid state ( ar, الدولة الزيرية, translit=ad-dawla az-zīriyya) was a Sanhaja Berber dynasty from ...

Ifriqiya Ifriqiya ( '), also known as al-Maghrib al-Adna ( ar, المغرب الأدنى), was a medieval historical region comprising today's Tunisia and eastern Algeria, and Tripolitania (today's western Libya). It included all of what had previously ...

where he entered the service of king Yaḥyā ibn Tamīm as‐Ṣanhājī and where his son, ʿAbd al‐ʿAzīz was born. He also occasionally traveled to

and worked in the court of

as a visiting

. He also sent poems to the Palermitan poet Abū ḍ-Ḍawʾ. He died, probably of dropsy, in

Béjaïa Béjaïa (; ; ar, بجاية‎, Latn, ar, Bijāya, ; kab, Bgayet, Vgayet), formerly Bougie and Bugia, is a Mediterranean port city and commune on the Gulf of Béjaïa in Algeria; it is the capital of Béjaïa Province, Kabylia. Béjaïa is ...

Algeria ) , image_map = Algeria (centered orthographic projection).svg , map_caption = , image_map2 = , capital = Algiers , coordinates = , largest_city = capital , relig ...

. He is buried in the

Ribat of Monastir The Ribat of Monastir ( ar, رباط المنستير) is a ribat, an Islamic defensive structure, located in Monastir, Tunisia. It is the oldest ribat built by the Arab conquerors during the Muslim conquest of the Maghreb.

Works

Abu as-Salt wrote an encyclopedic work of many treatises on the scientific disciplines known as

quadrivium From the time of Plato through the Middle Ages, the ''quadrivium'' (plural: quadrivia) was a grouping of four subjects or arts—arithmetic, geometry, music, and astronomy—that formed a second curricular stage following preparatory work in the ...

. This work was probably known in Arabic as ''Kitāb al‐kāfī fī al‐ʿulūm''. His poetry is preserved in the anthology of

Imad al-Din al-Isfahani Muhammad ibn Hamed Isfahani (1125 – 20 June 1201) ( fa, محمد ابن حامد اصفهانی), more popularly known as Imad ad-din al-Isfahani ( fa, عماد الدین اصفهانی) ( ar, عماد الدين الأصفهاني), was ...

. His interests also included

alchemy Alchemy (from Arabic: ''al-kīmiyā''; from Ancient Greek: χυμεία, ''khumeía'') is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practiced in China, India, the Muslim wo ...

as well as the study of medicinal plants. He was keen to discover an

elixir ELIXIR (the European life-sciences Infrastructure for biological Information) is an initiative that will allow life science laboratories across Europe to share and store their research data as part of an organised network. Its goal is to bring t ...

able to transmute

copper Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pink ...

into

gold Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile ...

and tin into

silver Silver is a chemical element with the symbol Ag (from the Latin ', derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical ...

Astronomy

* ''Risāla fī al-amal bi‐l‐astrulab'' ("On the construction and use of the

astrolabe An astrolabe ( grc, ἀστρολάβος ; ar, ٱلأَسْطُرلاب ; persian, ستاره‌یاب ) is an ancient astronomical instrument that was a handheld model of the universe. Its various functions also make it an elaborate inclin ...

") * A description of the three instruments known as the Andalusian equatoria. * ''Ṣifat ʿamal ṣafīḥa jāmiʿa taqawwama bi‐hā jamīʿ al‐kawākib al‐sabʿa'' ("Description of the construction and Use of a Single Plate with which the totality of the motions of the seven planets"), where the seven planets refer to Mercury,

Venus Venus is the second planet from the Sun. It is sometimes called Earth's "sister" or "twin" planet as it is almost as large and has a similar composition. As an interior planet to Earth, Venus (like Mercury) appears in Earth's sky never f ...

earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's sur ...

Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury. In the English language, Mars is named for the Roman god of war. Mars is a terrestrial planet with a thin at ...

Jupiter Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but slightly less than one-thousand ...

, and

Saturn Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; h ...

. * ''Kitāb al‐wajīz fī ʿilm al‐hayʾa'' ("Brief treatise on cosmology") * ''Ajwiba ʿan masāʾil suʾila ʿan‐ha fa‐ajāba or Ajwiba ʿan masāʾil fī al‐kawn wa‐ʾl‐ḥabīʿa wa‐ʾl‐ḥisāb'' ("Solution to questions on cosmology, physics, and arithmetic"). * An introduction to astronomy. * A Summary of

Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...

's ''

Almagest The ''Almagest'' is a 2nd-century Greek-language mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy ( ). One of the most influential scientific texts in history, it can ...

.''

Music

* ''Risāla fī l-musiqa'' ("Epistle about music") - a manuscript translated in Hebrew is kept in Paris

Medicine (pharmacobotany)

* Kitab al-adwiya al-mufrad - this book know both by a 1311 Latin translation by Almado de Vilanova and a Hebrew translation by Yehuda Nathan is unique as drugs are organized not by alphabetical order of the medicinal plants they are made of, but by the part of the body they are used to cure.

Description of Egypt

* ''Risāla al-misriyya'' (Epistle about Egypt) a report written for the Zirid prince Yahya, precious for its description of 13th century Egypt

Logic

* ''Taqwim al-dhikr'' (assessing memory) a summary of Porphyry's

Isagoge The ''Isagoge'' ( el, Εἰσαγωγή, ''Eisagōgḗ''; ) or "Introduction" to Aristotle's "Categories", written by Porphyry in Greek and translated into Latin by Boethius, was the standard textbook on logic for at least a millennium after his ...

and the first four books of

Aristotle Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of ...

Organon The ''Organon'' ( grc, Ὄργανον, meaning "instrument, tool, organ") is the standard collection of Aristotle's six works on logical analysis and dialectic. The name ''Organon'' was given by Aristotle's followers, the Peripatetics. The six ...

. The manuscript has been translated in Spanish by C. Angel GONZALEZ PALENCIA.

Notes

*
PDF version

References

{{DEFAULTSORT:Abu Al-Salt 1060s births 1134 deaths 11th-century Al-Andalus people 12th-century people of Ifriqiya People from Marina Alta Alchemists of the medieval Islamic world Inventors of the medieval Islamic world Astronomers of Al-Andalus Medieval Egyptian astronomers Physicians of Al-Andalus Mathematicians of Al-Andalus Philosophers of Al-Andalus Scholars from the Fatimid Caliphate 12th-century astronomers