Banū Mūsā brothers
Banū Mūsā | |
---|---|
بنوموسی | |
Born | 9th century |
Relatives | Nuʿaym ibn Muḥammad ibn Mūsā, the son of Abu Ja'far Muhammad |
Academic work | |
Era | Islamic Golden Age |
Institutions | House of Wisdom |
Main interests | Astronomy, geometry, mathematics, technology |
Notable works | Kitab al-Hiyal al-Naficah ("The Book of Ingenious Devices"); Kitāb Maʿrifah masāḥat al-ashkāl al-basīṭah wa-al-kuriyyah ("Book on the Measurement of Plane and Spherical Figures") |
The three brothers Abū Jaʿfar, Muḥammad ibn Mūsā ibn Shākir (before 803 – February 873); Abū al‐Qāsim, Aḥmad ibn Mūsā ibn Shākir (d. 9th century) and Al-Ḥasan ibn Mūsā ibn Shākir (d. 9th century), were
The Banū Mūsā were the sons of
The Banū Mūsā wrote almost 20 books, all but three of which are now lost. The most important of all their works was a
"). It describes 100 inventions, many of which were pouring vessels, intended to entertain party guests. Some of their innovations, such as those that involved fluid pressure variations and valves, remained unsurpassed until the modern period. One of those inventions includes an automatic flute player that may have been the first programmable machine or computer.Biographical details
Early years
Moḥammad, Aḥmad, and Ḥasan were the three sons of Mūsā ibn Shākir.[1] They are always listed in sources in what is assumed by scholars to be their order of seniority.[2] Musa was A Persian from Khorasan and a well-known Astronomer,[3][note 1]
After their father's death, the three orphaned children were cared for at the court of al-Maʾmūn, who made the senior Baghdad official
Accomplishments under the Abbasid Caliphate
The Banū Mūsā assisted al-Ma'mun's in his obsession to obtain and translate works from Greek into Arabic. They sent for Greek texts from the Byzantines, or travelled themselves to Byzantium to acquire them.[12] During their working lives they used their wealth and energy towards the translation of these works.[2] On his way home to Baghdad from Byzantium, Muhammad met and recruited Thābit ibn Qurra,[12] a money changer from Harran. Thābit went on to make important discoveries in algebra, geometry, and astronomy.[1][13]
Under the direction of al-Ma'mun, the Banū Mūsā worked with the most talented men available, including
The brothers are likely to have used portable instruments such as armillary spheres or dials when making their observations, which were recorded from around 847 to 869. From their Baghdad home, they observed stars in the constellation Ursa Major In 847–848, and measured the maximum and minimum altitudes of the Sun in 868–869. They also observed the September equinox in the Persian city of Samarra. To calculate the difference in latitude between Samarra and Nishapur, they organized simultaneous observations of a lunar eclipse.[17]
Whilst working for al-Ma’mun, the Banū Mūsā travelled to a desert near
Under the patronage of the caliphs that followed al Ma’mun—al-Mu'tasim, al-Wathiq, and al-Mutawakkil—the brothers continued to acquire great wealth and become influential in court. They used much of their wealth to collect the works of ancient writers, a practise that was later copied by other scholars at the House of Wisdom.[4][8] The brothers were very active during the reign of al-Mutawakkil, who was interested in mechanics, and asked the Banū Mūsā to write on this subject.[19] A son of al-Mu'tasim was educated by Ahmad, but the brothers' relations with the caliph are otherwise unknown. When close to death, al-Mu'tasim's successor al-Wathiq called together his astrologers, including Muhammed, who erroneously pronounced that the caliph would live for another 50 years.[19]
Involvement in politics
The Banū Mūsā's employment by the caliphs for different civil engineering projects, including their involvement in the building of the city of al-D̲j̲aʿfariyya for al-Mutawakki, led to them becoming involved in court politics. In 860, the Banū Mūsā and Mutawakkil’s architects were involved in obtaining land for a new city. The caliph’s advisor suggested that Muhammed and Ahmad bin Musa should be forced to contribute towards the expense of a new palace nearby.[20]
The peak of Muhammad's political activity came towards the end of his life, when Turkish commanders were starting to take control of the state. After the death of al-Mutawakkil, Muhammad helped al-Mustaʿīn to become nominated as caliph. Denied the throne, Al-Mustaʿīn's brother besieged Baghdad, and Muhammad was sent to estimate the size of the attacking army. After the siege, he was sent to find out the terms for al-Mustaʿīn to abdicate.[19]
Jaʻfariyya canal
It was during the reigns of al-Wathiq and al-Mutawakkil that internal rivalries arose between the scholars there. The Banū Mūsā became enemies of al-Kindi, and assisted in his persecution by al-Mutawakkil.[4] They criticized and ridiculed his treatise on the astrolabe, and caused al-Mutawakkil to have him beaten, removed from court, and his library confiscated. The library was returned back to him at a later date with the help of the Persian Jewish scholar Sanad ibn Ali, who insisted the library was returned as a condition to him assisting the Banū Mūsā over his judgement concerning the construction of a canal for the city of al-Ja’fariyya.[16][21]
Shortly before his death, Mutawakkil gave the Banū Mūsā overall responsibility for building the al-Ja’fariyya canal; they in turn delegated the work to Fargftani. The caliph discovered that, due to an engineering error, once built, the water in the canal would drain away. He decreed that the brothers would be
Deaths
Of the three brothers, only the year that Mohammed died—January 873—is known.[2]
Works
The Banū Mūsā wrote almost 20 books.
All but three of the books attributed by scholars to the Banū Mūsā are now lost.[22] Many of the lost works are named in the Book of Ingenious Devices, their most famous work.[3]
Astronomy and astrology
The Banū Mūsā are known to have made many astronomical observations in Baghdad.[12] Kitāb bayyana fīhī bi-ṭarīq taʿlīmī wa-madhhab handasī annahū laysa fī khārij kurat al-kawākib al-thābitah kurah tāsiʿah[23] ("Book on the Mathematical Proof by Geometry that there Is not a Ninth Sphere Outside the Sphere of the Fixed Stars") is a lost book, reportedly written by Ahmed.[12] Also referred to as the Kitāb al-Hay’a ("Book of Astronomy"), or the Kitāb Ḥarakāt al-falak al-ūlā ("Book on the First Motion of the Celestial Sphere"), the work analysed the Ptolemy's geocentric model of the cosmos, in which a ninth sphere is responsible for the motion of the heavens, and instead considered that the Sun, the Moon, the planets, and the stars all moved of their own volition.[12]
The other astronomical or astrological works by the Banū Mūsā are:
- Kitāb al-Daraj ("The Book of Degrees");[1]
- Kitāb fī ʿamal al-asṭurlāb ("Book on the Construction of the Astrolabe"), a work quoted by the 11th century Persian scholar al-Biruni;[12]
- Kitāb fī sanat al-shams bil-irṣād ("Book on the Solar Year"), which was once attributed to Thābit ibn Qurra;[12][24]
- Ruyʾat al-hilāl ʿalá raʾy Abī Jaʿfar[25] ("On the Visibility of the Crescent"), by Muhammad;[12]
- Book on the Beginning of the World, by Muhammad,[12] now lost;[26]
- A non-extant zij (an Islamic astronomical book used to calculate the positions of the Sun and objects in the night sky) by Ahmad was mentioned by the Egyptian astronomer and mathematician Ibn Yunus in his Az-Z0j al-Kabir al-Hdkim, written in c. 990;[12][27]
- A separate non-extant zij by the Banū Mūsā was mentioned by Ibn Yunus.[12][28]
- A translation of a Chinese work called A Book of Degrees on the Nature of Zodiacal Signs;[12]
The calculation by Moḥammad and Aḥmad of the Sun’s mean motion in a year agreed with the result obtained by al-Bīrūnī—that a solar year was 365 days and less than 6 hours long. Aḥmad independently reached a similar conclusion in 851–852. They observed the longitude of Regulus from their house on a bridge in Baghdad in 840–841, 847–848, and 850–851, and made observations of Sirius, Al-Bīrūnī used data about the Moon obtained by the Banū Mūsā in his astrological calculations.[1]
Mathematics
The Banū Mūsā were some of the earliest scholars to adopt Greek mathematics. They differed from the Greeks in their approaches to the concepts of area and circumference, giving them numerical values rather than considering them in terms of ratios.[4]
Book on the Measurement of Plane and Spherical Figures
The most important of the works produced by the Banū Mūsā was the Kitāb maʻrifat masāḥat al-ashkāl al-basīṭah wa-al-kurīyah ("
Other mathematical works
The other known mathematical works by the Banū Mūsā were:
- Three works relating to Conic Sections, a book by the astronomer Apollonius of Perga. Conic Sections was first translated to Arabic by Hilāl al-ḥimṣī and Thābit ibn Qurra. One of these three works, lī-kitāb Abulūnyūs fī al-maḫrūṭāt ("Conic Sections of Apollonius"), by Muhammed, was a recension of Apollonius's book.[26][31]
- Kitāb al-shakl al-mudawwar al-mustaṭīl ("The Book of the Elongated Circular Figure"),[32][33] a mathematical treatise by al-Hasan—and the only one that is attributed to him— now lost.[1][26] It contained a description of a procedure used to draw an ellipse using a length of string, a technique that is now known as the "gardener's construction";[12]
- Fī tathlīth al-zāwiyah or Qawl Aḥmad ibn Shākir fī tathlīth al-zāwiyah ("Reasoning on the Trisection of an Angle"), by Aḥmad;Oxford University.[34]
- Kitāb al-shakl al-handasī alladhī bayyanahu Jālīnūs ("Book on a Geometric Proposition Proved by Galen").[12] A lost book by Muhammed.[15]
Technology
The Book of Ingenious Devices
Kitab al-Hiyal al-Naficah ("The Book of Ingenious Devices"), the only surviving work by Aḥmad,[1] describes 100 inventions, 25 of which had a practical use.[35] These include mechanical fountains, a "hurricane" lamp, self-trimming and self-feeding lamps, a form of gas mask for use underground, and a grabbing tool, constructed in the same way as a modern clamshell grab, for recovering underwater objects.[36] The book's other inventions are ingeniously built pouring vessels, designed to puzzle guests at parties. It is thought that some of these models were never constructed.[37][35][36]
The inventions employ innovative engineering ideas, such as automatic one-way and two-way valves, mechanical memories, devices capable of responding to feedback, and delay mechanisms. Most of them were operated by water pressure.[37] The trick vessels are unimportant in themselves; their significance for historians of engineering is the means by which they were developed.[36] Many of Ahmad's ideas were obtained from Greek texts such as Philo of Byzantium's Pneumatics (3rd century BCE) and Hero of Alexandria's Pneumatics (written in the 1st century CE). However, some of the devices, particularly when involving small variations in fluid pressure, and automatic control components such as valves, were developed by the Banū Mūsā.[22]
The most important copies of the Kitab al-Hiyal al-Naficah are:[35]
- a complete manuscript held at the Vatican Library (no. 317);
- a manuscript in two parts kept at the Berlin State Library (Ahlward No. 5562) and Gotha (Pertsch No. 1349);
- the manuscript at the Topkapi Sarayi (A 3474), which is both the oldest and most reliable of the all the extant copies of the work.[35]
Other works
The other technology-based works by the Banū Mūsā were:
- Kitāb fī al-qarasṭūn ("A Book on the Qarasṭūn"), a treatise on the weight balance, or Thabit bin Qurra also wrote a book on the steelyard.[15]
- A Book on the Description of the Instrument Which Sounds by Itself. A copy of the manuscript is held in programmable machine.[39]
- Kitāb al-masʾalah allatī alqāhā ʿalá Sanad ibn ʿAlī, a treatise containing a discussion between Ahmad and Sanad ibn Ali,[15][40] possibly about the difficulties encountered by the Banū Mūsā due to the failure by their agent Al-Farghani to properly build the Jaʻfariyya canal.[1]
See also
- Inventions in the Muslim world
- Mathematics in the medieval Islamic world
- Science in the medieval Islamic world
Notes
References
- ^ a b c d e f g h i j k l Pingree 1988.
- ^ a b c Bir 1990, p. 1.
- ^ a b Bennison 2009, p. 187.
- ^ MacTutor. University of St Andrews. Retrieved 18 March 2023.
- ^ Rekaya, M. (2012). "al-Maʾmūn". Encyclopaedia of Islam, Second Edition. Retrieved 22 April 2023.
- ^ Bir 1990, pp. 1–2.
- ^ Hajar 2013.
- ^ a b c Bir 1990, p. 2.
- ^ Meri 2005, p. 402.
- ^ a b al-Dabbagh 1970, p. 444.
- ^ al-Khalili 2011, p. 68.
- ^ a b c d e f g h i j k l m n o p q r s Casulleras 2007.
- ^ Palmeri 2007.
- ^ Gutas 1998, p. 133.
- ^ a b c d e Bir 1990, p. 6.
- ^ a b Bir 1990, p. 5.
- ^ Blake 2016, p. 39.
- ^ a b Bir 1990, p. 3.
- ^ a b c d Bir 1990, p. 4.
- ^ Bir 1990, pp. 4–5.
- ^ Bennison 2009, p. 191.
- ^ a b Hill 2008.
- ^ "Kitāb bayyana fīhī bi-ṭarīq taʿlīmī wa-madhhab handasī annahū laysa fī khārij kurat al-kawākib al-thābitah kurah tāsiʿah". Islamic Scientific Manuscripts Initiative. Retrieved 20 March 2023.
- ^ "Kitāb fī sanat al-shams bil-irṣād كتاب في سنة الشمس بالإرصاد Thābit ibn Qurrah al-Ḥarrānī ثابت بن قرّة الحرّاني [9v] (17/17)". Qatar National Library. 20 November 2014. Retrieved 22 April 2023.
- ^ "Ruyʾat al-hilāl ʿalá raʾy Abī Jaʿfar Muḥammad ibn Mūsá ibn Shākir". Islamic Scientific Manuscripts Initiative. Retrieved 20 March 2023.
- ^ a b c Bir 1990, pp. 6–7.
- ^ Kennedy 1956, p. 14.
- ^ Kennedy 1956, p. 13.
- ^ "Kitāb maʿrifah masāḥat al-ashkāl al-basīṭah wa-al-kuriyyah". Islamic Scientific Manuscripts Initiative. Retrieved 23 April 2023.
- ^ al-Dabbagh 1970, p. 445.
- ^ a b c al-Dabbagh 1970, p. 446.
- ^ "Kitāb al-shakl al-mudawwar al-mustaṭīl". Islamic Scientific Manuscripts Initiative. Retrieved 20 March 2023.
- ^ Rashed 2014, p. 559.
- ^ a b "Qawl Aḥmad ibn Shākir fī tathlīth al-zāwiyah". Islamic Scientific Manuscripts Initiative. Retrieved 20 March 2023.
- ^ a b c d Bir 1990, p. 8.
- ^ a b c Hill 1991.
- ^ a b Masood 2009, pp. 161–163.
- ^ "Kitāb fī al-qarasṭūn". Islamic Scientific Manuscripts Initiative. Retrieved 20 March 2023.
- ^ Long et al. 2017.
- ^ "Kitāb al-masʾalah allatī alqāhā ʿalá Sanad ibn ʿAlī". Islamic Scientific Manuscripts Initiative. Retrieved 20 March 2023.
Sources
- Bennison, Amira K. (2009). The Great Caliphs: The Golden Age of the 'Abbasid Empire. New Haven, Connecticut: ISBN 978-03001-5-227-2.
- Bir, Atilla (1990). The Book "Kitab Al-Hiyal" of Banu Musa Bin Shakir, interpreted in Sense of Modern System and Control Engineering. Istanbul: Research Centre for Islamic History, Art and Culture. OCLC 24991757.
- Blake, Stephen P. (2016). Astronomy and Astrology in the Islamic World. Edinburgh: ISBN 978-07486-4-911-2.
- Casulleras, Josep (2007). "Wābkanawī: Shams al‐Munajjim [Shams al‐Dīn] Muḥammad ibn ҁAlī Khwāja al‐Wābkanawī [Wābkanawī]". In Hockey, Thomas; et al. (eds.). The Biographical Encyclopedia of Astronomers. ISBN 978-0-387-31022-0. (PDF version)
- al-Dabbagh, J. (1970). "Banū Mūsā". In Gillispie, Charles Coulston; Holmes, Frederic Lawrence (eds.). Dictionary of Scientific Biography. Vol. 1. New York: Scribner. OCLC 755137603.
- Gutas, Dimitri (1998). Greek Thought, Arabic Culture: The Graeco-Arabic Translation Movement in Baghdad and Early ʻAbbāsid Society (2nd–4th/8th-10th centuries). New York: ISBN 978-0-415-06132-2.
- Hajar, Rachel (2013). "The Air of History Part III: The Golden Age in Arab Islamic Medicine An Introduction". Heart Views. 14 (1): 43–46. PMID 23580929.
- Hill, Donald R. (1991). "Mechanical Engineering in the Medieval Near East". Scientific American. 264 (5): 100–105. JSTOR 24936907.
- Hill, Ronald R. (2008). "Banū Mūsā". In Selin, Helaine (ed.). Encyclopaedia Of The History Of Science, Technology, And Medicine Non Western Cultures. Vol. 1. Brill Publishers.
- JSTOR 1005726.
- ISBN 978-15942-0-279-7.
- Long, Jason; Murphy, Jim; Carnegie, Dale; Kapur, Ajay (2017). "Loudspeakers Optional: A history of non-loudspeaker-based electroacoustic music". Organised Sound. 22 (2): 195–205. S2CID 143427257.
- Masood, Ehsan (2009). Science & Islam: A History. London: Icon Books. ISBN 978-18483-1-081-0.
- Meri, Josef W., ed. (2005). Medieval Islamic Civilization: An Encyclopedia. Taylor & Francis. ISBN 978-11354-5-596-5.
- Palmeri, JoAnn (2007). "Wābkanawī: Shams al‐Munajjim [Shams al‐Dīn] Muḥammad ibn ҁAlī Khwāja al‐Wābkanawī [Wābkanawī]". In Hockey, Thomas; et al. (eds.). The Biographical Encyclopedia of Astronomers. ISBN 978-0-387-31022-0.
- Pingree, David (1988). "Banū Mūsā". Encyclopædia Iranica.
- Rashed, Roshdi (2014). Classical Mathematics from Al-Khwarizmi to Descartes. Translated by Shank, Michael H. New York: ISBN 978-13176-2-239-0.
Further reading
- Chaarani, Mona Sanjakdar (24 June 2021). "The Automatic Mechanical Hydraulic Organ of the Banu Musa ibn Shakir". Muslim Heritage. Foundation for Science, Technology and Civilisation, UK (FSTCUK). Retrieved 21 March 2023.
- al-Hassini, Salam T.S., ed. (2012). 1001 Inventions: The Enduring Legacy of Muslim Civilization (3rd ed.). Washington, DC: ISBN 978-1-4262-0934-5 – via Internet Archive.
- Rashed, Roshdi, ed. (2009). Encyclopedia of the History of Arabic Science. Vol. 2. London; New York: Routledge. ISBN 978-0-203-40360-0.
- Rashed, Roshdi (2012). El-Bizri, Nader (ed.). Founding Figures and Commentators in Arabic Mathematics: A History of Arabic Sciences and Mathematics. Vol. 1. Abingdon, UK; New York: ISBN 978-11366-2-000-3.
Digitized manuscripts and translations
- Manuscript facsimile of the Kitāb al-Daraj held in the Princeton University Library (Islamic Manuscripts, Garrett no. 501H)
- The Book of Ingenious Devices:
- A manuscript facsimile held in the Vatican Library (Manuscript Vaticani Arabi 317), a copy of which was made by the philosopher al ‘Afrit.
- A manuscript facsimile held at the Berlin State Library (Ms. or. quart. 739).
- A manuscript facsimile held at the University of Erfurt (Ms. orient. A 1349).
- A manuscript facsimile of Kitāb al-mutawassiṭāt kept at Columbia University, New York (via the Internet Archive). The treatise Kitāb maʻrifat masāḥat al-ashkāl al-basīṭah wa-al-kurīyah is located from pp. 253–265 (f. 116 to 122).
Translations
- Hill, Donald R., ed. (1979) [9th century]. The Book of Ingenious Devices. Dortrecht, Netherlands; Boston; London: D. Reidel. ISBN 978-90277-0-833-5. (PDFversion)
- Muḥammad ibn MūsáIbn Shākir; Gerard of Cremona; Curtze, M. (1885) [before 873]. Der liber trium fratrum de geometria. Nova acta der KSL. Leop.-Carol. Deutschen akademie der naturforscherbd. 49. Nr. 2 (in Latin and German). Halle: Druck von E. Blochmann & sohn – via Hathi Trust Digital Library.
- Rosen, Frederic, ed. (1831). The Algebra of Mohammed ben Musa. Translated by Rosen, Frederic. London: John Murray. OCLC 1039506129.
External links
- Media related to Banū Mūsā at Wikimedia Commons
- A list of works by the Banū Mūsā from the Islamic Scientific Manuscripts Initiative (ISMI) website
- Pioneers of Engineering: Al-Jazari and the Banu Musa TV episode from Al Jazeera (25 minutes)
- Meier, Allison (12 April 2016). "The 9th-Century Islamic "Instrument Which Plays by Itself"". Hyperallergic. Retrieved 21 March 2023.