Science in the medieval Islamic world

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The Tusi couple, a mathematical device invented by Nasir al-Din Tusi in 1247 to model the not perfectly circular motions of the planets

Science in the medieval Islamic world was the science developed and practiced during the Islamic Golden Age under the Abbasid Caliphate (c. 800–1250) and, to a lesser extent, under the Mamluks and Nasrids during the late medieval period. Islamic scientific achievements encompassed a wide range of subject areas, especially astronomy, mathematics, and medicine. Other subjects of scientific inquiry included alchemy and chemistry, botany, geography and cartography, ophthalmology, pharmacology, physics, and zoology.

In the 8th century, scholars had translated Indian, Assyrian, Iranian and Greek knowledge, including the works of Aristotle, into Arabic. These translations became a wellspring for advances by scientists from Muslim-ruled areas during the Middle Ages.[1]

Context[edit]

The Abbasid Caliphate at its greatest extent, c. 850

Through the Umayyad and, in particular, the succeeding Abbasid Caliphate's early phase, lies the period of Islamic history known as the Islamic Golden Age, between 692 and 945, with stable political structures and flourishing trade. Major religious and cultural works of the empire were translated into Arabic. The culture inherited Greek, Indic, Assyrian and Persian influences, and a new common civilisation formed, based on Islam. An era of high culture and innovation ensued.[2]

Fields of inquiry[edit]

Islamic science drew primarily upon Arab, Persian, Indian and Greek learning. Islamic scientific achievements encompass a wide range of subject areas, especially mathematics, astronomy, and medicine.[1] Other subjects of scientific inquiry included physics, alchemy and chemistry, ophthalmology, and geography and cartography.[3]

Alchemy and chemistry[edit]

Alchemy was already well established before the rise of Islam, based on the belief that substances were made up of the four Aristotelian elements, fire, earth, air, and water in different proportions. Alchemists supposed that gold was the noblest metal, and that other metals formed a series down to the basest, such as lead. They believed, too, that a fifth element, the elixir, could transform a base metal into gold. Jabir ibn Hayyan (8th–9th centuries) wrote on alchemy, based on his own experiments. He described laboratory techniques and experimental methods that would continue to be used when alchemy had transformed into chemistry. Ibn Hayyan identified many substances including sulfuric and nitric acids. He described processes including sublimation, reduction and distillation. He utilized equipment such as the alembic and the retort stand. There is considerable uncertainty as to the actual provenance of many works that are ascribed to him.[4][5][6]

Astronomy and cosmology[edit]

al-Biruni's explanation of the phases of the moon

Astronomy was one of the major disciplines within Islamic science. The effort was devoted both towards understanding the nature of the cosmos and to practical purposes, including determining the Qibla, the direction in which to pray, and to astrology, predicting events affecting human life and selecting suitable times for actions such as going to war or founding a city.[7] Al-Battani (850–922) accurately determined the length of the solar year. He contributed to numeric tables, such as the Tables of Toledo, used by astronomers to predict the movements of the sun, moon and planets across the sky. Some of his astronomic tables were later used by Copernicus.[8] Al-Zarqali (1028–1087) developed a more accurate astrolabe, used for centuries afterwards. He constructed a water clock in Toledo. He discovered that the Sun's apogee moves slowly relative to the fixed stars, and obtained a good estimate of its motion.[9] for its rate of change.[10] Nasir al-Din al-Tusi (1201–1274) wrote an important revision to Ptolemy's celestial model. When he became Helagu's astrologer, he was given an observatory and gained access to Chinese techniques and observations. He developed trigonometry as a separate field, and compiled the most accurate astronomical tables available up to that time.[11]

Botany[edit]

The study of the natural world extended to a detailed examination of plants. The work done was directly useful in the unprecedented growth of pharmacology across the Islamic world. Al-Dinawari is considered the founder of Arabic botany for his six-volume Kitab al-Nabat (Book of Plants). Only volumes 3 and 5 have survived, with part of volume 6 reconstructed from quoted passages. In what survives, 637 plants are described in alphabetical order from the letters sin to ya, so the whole book must have covered several thousand kinds of plant. Al-Dinawari describes the phases of plant growth and the production of flowers and fruit. Zakariya al-Qazwini's thirteenth century encyclopedia ʿAjā'ib al-makhlūqāt (The Wonders of Creation) contained among many other topics both realistic botany and fantastic trees which grew birds on their twigs in place of leaves, but which could only be found in the far-distant British Isles.[12][13]

Geography and cartography[edit]

Surviving fragment of the first World Map of Piri Reis (1513)

The swift spread of Islam across West Asia and North Africa encouraged and involved an unprecented growth in trade and travel by land and sea as far away as Southeast Asia, China, much of Africa, Scandinavia and even Iceland. Geographers worked to create and fill in increasingly accurate maps of the known world, starting from many existing but fragmentary sources.[14]al-Idrisi (1100–1166) created a map of the world for Roger, the Norman King of Sicily, and wrote the Book of Roger, a geographic study of the peoples, climates, resources and industries of all the world known at that time.[15] Piri Reis (c. 1470–1553) made a map of the New World and West Africa in 1513, making use of maps from Greece, Portugal, Muslim sources, and perhaps one made by Christopher Columbus.[16]

Mathematics[edit]

A page from al-Khwarizmi's Algebra

Islamic mathematicians gathered, organised and clarified the mathematics they inherited from ancient Egypt, Greece, India, Mesopotamia and Persia, and went on to make innovations of their own. Islamic mathematics can be divided into algebra, geometry and arithmetic. Algebra was mainly used for recreation and had few practical applications. Geometry was studied at different levels. Some texts contain practical geometrical rules for surveying and for measuring figures. Theoretical geometry was a necessary prerequisite for understanding astronomy and optics, and it required years of concentrated work. Soon after the establishment of the Abbasid caliphate and the founding of Baghdad in the mid-eighth century, some mathematical knowledge must have been assimilated from the pre-Islamic Persian tradition in astronomy. Astronomers from India were invited to the court of the caliph in the late eighth century, and they explained the rudimentary trigonometrical techniques used in Indian astronomy. Ancient Greek works such as Ptolemy's Almagest and Euclid's Elements were translated into Arabic. During the second half of the ninth century, Islamic mathematicians were already making contributions to the most sophisticated parts of Greek geometry. Islamic mathematics reached its apogee in the Eastern part of the Islamic world between the tenth and twelfth centuries CE, though little support was provided for it. Most mathematical works were written in Arabic, others in Persian.[17][18]

Omar Khayyam's "Cubic equation and intersection of conic sections"

al-Khwarizmi (8th–9th centuries), considered the greatest mathematician of Islamic civilization, was instrumental in the adoption of the Indian numbering system, later known as Arabic numerals. He developed algebra, which also had Indian antecedents, introducing methods of simplifying equations, and used Euclidean geometry in his proofs.[19] [20] Ibn Ishaq al-Kindi (801–873) worked on cryptography for the caliphate.[21] Avicenna (ca. 980–1037) contributed to the development of mathematical techniques such as Casting out nines.[22] Thabit ibn Qurra (835–901) calculated the solution to a chessboard problem involving an exponential series.[23] al-Farabi (ca. 870–950) attempted to describe, geometrically, the repeating patterns popular in Islamic decorative motifs. His book on the subject is titled Spiritual Crafts and Natural Secrets in the Details of Geometrical Figures.[24] Omar Khayyam (1048–1131), known in the West as a poet, calculated the length of the year to within 5 decimal places. He found geometric solutions to all 13 forms of cubic equations. He developed some quadratic equations still in use. [25] Jamshid al-Kashi (ca. 1380–1429) is credited with several theorems of trigonometry including the Law of Cosines, also known as Al-Kashi's Theorem. He is often credited with the invention of decimal fractions, and a method like Horner's to calculate roots. He calculated π correctly to 17 significant figures.[26]

Medicine[edit]

A coloured illustration from Mansur's Anatomy, c. 1450

Islamic society paid careful attention to medicine, following a hadith enjoining the preservation of good health. Its physicians inherited knowledge and traditional medical beliefs from the civilisations of classical Greece, Rome, Syria, Persia and India. These included the writings of Hippocrates, including the theory of the four humours, and the theories of Galen.[27] al-Razi (ca. 854–925/935) identified smallpox and measles, and recognized that fever was a part of the body's defenses. He wrote a 23-volume compendium of Chinese, Indian, Persian, Syriac and Greek medicine. al-Razi questioned the classical Greek medical theory of how the four humors regulate life processes. He challenged Galen's work on several fronts, including the treatment of bloodletting, arguing that it was effective.[28] al-Zahrawi (936–1013) was a surgeon whose most important surviving work is referred to as al-Tasrif (Medical Knowledge). It is a 30 volume set mainly discussing medical symptoms, treatments, and pharmacology, but the last volume, on surgery, describes surgical instruments, supplies, and pioneering procedures.[29] Avicenna (ca. 980–1037) wrote the major medical textbook, The Canon of Medicine.[30] ibn al-Nafis (1213–1288) wrote an influential book on medicine, believed to have replaced Avicenna's Canon in the Islamic world. He wrote commentaries on Galen and Avicenna's works. One of these commentaries was discovered in 1924, and yielded a description of pulmonary transit, the circulation of blood through the lungs.[31]

Optics and ophthalmology[edit]

The eye according to Hunayn ibn Ishaq, c. 1200

Optics developed rapidly in this period. By the ninth century, there were works on physiological optics as well as mirror reflections, and geometrical and physical optics. Hunayn ibn Ishaq (809–873) wrote the book Ten Treatises on the Eye, influential in the West until the 17th century.[32] Abbas ibn Firnas (810–887) developed lenses for magnification and the improvement of vision.[33] Ibn Sahl (ca. 940–1000) discovered the law of refraction known as Snell's law. He used the law to produce the first Aspheric lenses that focused light without geometric aberrations.[34][35] In the eleventh century, Ibn al-Haytham (Alhazen, 965–1040) rejected Greek ideas about vision, and argued in his "Book of Optics" that light was reflected upon different surfaces in different directions, thus causing different light signatures of objects seen.[36][37] He also studied the effects of light refraction, and suggested that the mathematics of reflection and refraction needed to be consistent with the anatomy of the eye.[38]

Pharmacology[edit]

Ibn Sina teaching the use of drugs. 15th century Great Canon of Avicenna

Advances in botany and chemistry in the Islamic world encouraged developments in pharmacology. Muhammad ibn Zakarīya Rāzi (Rhazes) (865-915) promoted the medical uses of chemical compounds. Abu al-Qasim al-Zahrawi (Abulcasis) (936-1013) pioneered the preparation of medicines by sublimation and distillation. His Liber servitoris provides recipes and instructions for preparing "simples" from which were compounded the complex drugs then used. Sabur Ibn Sahl (d 869), was the first physician to describe a large variety of drugs and remedies for ailments. Al-Biruni (973-1050) wrote the Kitab al-Saydalah (The Book of Drugs), describing in detail the properties of drugs, the role of pharmacy and the duties of the pharmacist. Ibn Sina (Avicenna) described 700 preparations, their properties, mode of action and their indications, devoting a whole volume to simple drugs in The Canon of Medicine. Works by Masawaih al-Mardini (c. 925–1015) and Ibn al-Wafid (1008–1074) were both printed in Latin more than fifty times, appearing as De Medicinis universalibus et particularibus by Masawaiyh (Mesue) the younger, and the Medicamentis simplicibus by Ibn al-Wafid (Abenguefit). Peter of Abano (1250–1316) translated and added a supplement to the work of al-Mardini under the title De Veneris. Al-Muwaffaq, in the 10th century, wrote The foundations of the true properties of Remedies, describing chemicals such as arsenious oxide and silicic acid. He made clear distinction between sodium carbonate and potassium carbonate, and drew attention to the poisonous nature of copper compounds, especially copper vitriol, and also lead compounds.[39]

Physics[edit]

Self trimming lamp in Ahmad ibn Mūsā ibn Shākir's treatise on mechanical devices, c. 850

The fields of physics studied in this period, apart from optics and astronomy which are described separately, are aspects of mechanics: statics, dynamics, kinematics and motion. In the sixth century John Philoponus had rejected the Aristotelian view of motion, and argued that an object acquires an inclination to move when it has a motive power impressed on it. In the eleventh century Ibn Sina adopted roughly the same idea, that a moving object has force which is dissipated by external agents like air resistance.[40] Ibn Sina distinguished between 'force' and 'inclination' (mayl); he claimed that an object gained mayl when the object is in opposition to its natural motion. He concluded that continuation of motion is attributed to the inclination that is transferred to the object, and that object will be in motion until the mayl is spent. However, he also claimed that a projectile in a vacuum would not stop unless it is acted upon, a view consistent with Newton's first law of motion, inertia;[41] but as a non-Aristotelian suggestion, it was essentially abandoned until it was described as "impetus" by Jean Buridan (c. 1295–1363), who was influenced by Ibn Sina's Book of Healing.[40]

In Abū Rayḥān al-Bīrūnī's (973–1048) Shadows, non-uniform motion is described as the result of acceleration.[42] Ibn-Sina's theory of mayl tried to relate the velocity and weight of a moving object, a precursor of the concept of momentum.[43] Aristotle's theory of motion stated that a constant force produces a uniform motion; Abu'l-Barakāt al-Baghdādī (c. 1080 – 1164/5) contradicted this, arguing that velocity and acceleration are two different things, and and that force is proportional to acceleration and not velocity.[44]

Ibn Bajjah (Avempace, c. 1085–1138) proposed that for every force there is a reaction force. While he did not specify that these forces be equal, it was still an early version of Newton's third law of motion.[45]

The Banu Musa brothers, Jafar-Muhammad, Ahmad and al-Hasan (ca. early 9th century) created automated devices described in their Book of Ingenious Devices.[46][47][48]

Zoology[edit]

Page from the Kitāb al-Hayawān by Al-Jahiz
Further information: Kitāb al-Hayawān

Many classical works including those of Aristotle were transmitted from Greek to Syriac, then to Arabic, then to Latin in the Middle Ages. Aristotle's zoology remained dominant in its field for the next two thousand years.[49] The Kitāb al-Hayawān (كتاب الحيوان, English: Book of Animals) is a 9th-century Arabic translation of History of Animals: 1–10, On the Parts of Animals: 11–14,[50] and Generation of Animals: 15–19.[51][52]

The book was mentioned by Al-Kindī (d. 850), and commented on by Avicenna (Ibn Sīnā) in his The Book of Healing. Avempace (Ibn Bājja) and Averroes (Ibn Rushd) commented on On the Parts of Animals and Generation of Animals, Averroes criticising Avempace's interpretations.[53]

Significance[edit]

Historians of science differ in their views of the significance of medieval Islamic science. The traditionalist view, as exemplified by Bertrand Russell,[54] holds that Islamic science, while admirable in many technical ways, lacked the intellectual energy required for innovation and was chiefly important as a preserver of ancient knowledge and transmitter to medieval Europe. The revisionist view, as exemplified by Abdus Salam,[55] George Saliba[56] and John M. Hobson[57] holds that a Muslim scientific revolution occurred during the Middle Ages.[58] Scholars such as Donald Routledge Hill and Ahmad Y Hassan argue that Islam was the driving force behind the Muslim achievements.[59]

According to Ahmed Dallal, science in medieval Islam was "practiced on a scale unprecedented in earlier human history or even contemporary human history".[60] Toby E. Huff[61][62] takes the view that, although Islamic science did produce a number of innovations, it did not lead to the Scientific Revolution. Will Durant,[63] Fielding H. Garrison,[64] Hossein Nasr[65] and Bernard Lewis[66] held that Muslim scientists helped in laying the foundations for an experimental science with their contributions to the scientific method and their empirical, experimental and quantitative approach to scientific inquiry.

See also[edit]

Notes[edit]

  1. ^ a b Robinson (editor), Francis (1996). The Cambridge Illustrated History of the Islamic World. Cambridge University Press. pp. 228–229. 
  2. ^ Hodgson, Marshall (1974). The Venture of Islam; Conscience and History in a World Civilisation Vol 1. University of Chicago. pp. 233–238. ISBN 978-0-226-34683-0. 
  3. ^ Turner, 2009. Table of Contents.
  4. ^ Masood (2009, pp.153–55)
  5. ^ Lagerkvist, Urf (2005). The Enigma of Ferment: from the Philosopher's Stone to the First Biochemical Nobel Prize. World Scientific Publishing. p. 32. 
  6. ^ Turner (1997, pp.189–194)
  7. ^ Turner (1997, pp.59–116)
  8. ^ Masood (2009, pp.74, 148–50)
  9. ^ Linton (2004), p.97). Owing to the unreliability of the data al-Zarqali relied on for this estimate, its remarkable accuracy was fortuitous.
  10. ^ Masood (2009, pp.73–75)}}
  11. ^ Masood (2009, pp.132–35)
  12. ^ Fahd, Toufic, Botany and agriculture, p. 815 , in Morelon & Rashed 1996, pp.813–852
  13. ^ Turner (1997, pp.162–188)
  14. ^ Turner (1997, pp.117–130)
  15. ^ Masood (2009, pp.79–80)
  16. ^ Turner (1997, pp.128–129)
  17. ^ Meri, Josef W. (January 2006). Medieval Islamic Civilization, Volume 1: An Encyclopedia. Routledge. pp. 484—485. ISBN 978-0-415-96691-7. 
  18. ^ Turner (1997, pp.43–58)
  19. ^ Toomer, Gerald (1990). "Al-Khwārizmī, Abu Jaʿfar Muḥammad ibn Mūsā". In Gillispie, Charles Coulston. Dictionary of Scientific Biography. 7. New York: Charles Scribner's Sons. ISBN 0-684-16962-2.
  20. ^ Masood (2009, pp.139–45)
  21. ^ Masood (2009, pp.49–52
  22. ^ Masood (2009, pp.104–5)
  23. ^ Masood (2009, pp.48–49)
  24. ^ Masood (2009, pp.148–49)
  25. ^ Masood (2009, pp.5, 104, 145–146)
  26. ^ O'Connor, John J.; Robertson, Edmund F., "Ghiyath al-Din Jamshid Mas'ud al-Kashi", MacTutor History of Mathematics archive, University of St Andrews.
  27. ^ Turner (1997, pp.131–161)
  28. ^ Masood (2009, pp.74, 99–105)
  29. ^ Masood (2009, pp.108–109)
  30. ^ Masood (2009, pp.104–5)
  31. ^ Masood (2009, pp.110–11)
  32. ^ Masood (2009, pp.47–48, 59, 96–97, 171–72)
  33. ^ Masood (2009, pp.71–73)
  34. ^ K. B. Wolf, "Geometry and dynamics in refracting systems", European Journal of Physics 16, p. 14-20, 1995.
  35. ^ R. Rashed, "A pioneer in anaclastics: Ibn Sahl on burning mirrors and lenses", Isis 81, p. 464–491, 1990
  36. ^ Dallal, Ahmad (2010). Islam, Science, and the Challenge of History. Yale University Press. pp. 38–39. 
  37. ^ Lindberg, David C. (1976). Theories of Vision from al-Kindi to Kepler. University of Chicago Press, Chicago. ISBN 0-226-48234-0. OCLC 1676198. 
  38. ^ Masood (2009, pp.173–75)
  39. ^ Levey, M. (1973). Early Arabic Pharmacology. E. J. Brill. 
  40. ^ a b Sayili, Aydin. "Ibn Sina and Buridan on the Motion the Projectile". Annals of the New York Academy of Sciences vol. 500(1). p.477-482.
  41. ^ Espinoza, Fernando. "An Analysis of the Historical Development of Ideas About Motion and its Implications for Teaching". Physics Education. Vol. 40(2).
  42. ^ "Biography of Al-Biruni". University of St. Andrews, Scotland. 
  43. ^ Nasr S.H., Razavi M.A.. "The islamic Intellectual Tradition in Persia" (1996). Routledge
  44. ^ Pines, Shlomo (1986). Studies in Arabic versions of Greek texts and in mediaeval science. 2. Brill Publishers. p. 203. ISBN 965-223-626-8. 
  45. ^ Franco, Abel B.. "Avempace, Projectile Motion, and Impetus Theory". Journal of the History of Ideas. Vol. 64(4): 543.
  46. ^ Masood (2009, pp.161–63)
  47. ^ Lindberg, David (1978). Science in the Middle Ages. The University of Chicago Press. p. 23,56. 
  48. ^ Selin, Helaine, ed. (1997). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Kluwer Academic Publishers. pp. 151, 235, 375. 
  49. ^ Hoffman, Eva R. (2013). Translating Image and Text in the Medieval Mediterranean World between the Tenth and Thirteenth Centuries. Mechanisms of Exchange: Transmission in Medieval Art and Architecture of the Mediterranean, ca. 1000–1500. Brill. pp. 288–. ISBN 90-04-25034-4. 
  50. ^ Kruk, R., 1979, The Arabic Version of Aristotle's Parts of Animals: book XI–XIV of the Kitab al-Hayawan, Royal Netherlands Academy of Arts and Sciences, Amsterdam-Oxford 1979.
  51. ^ Contadini, Anna (2012). A World of Beasts: A Thirteenth-Century Illustrated Arabic Book on Animals (the Kitab Na't al-Hayawan) in the Ibn Bakhtishu' Tradition). Leiden: Brill. 
  52. ^ Kruk, R., 2003, "La zoologie aristotélicienne. Tradition arabe", DPhA Supplement, 329–334
  53. ^ Leroi, Armand Marie (2014). The Lagoon: How Aristotle Invented Science. Bloomsbury. pp. 354–355. ISBN 978-1-4088-3622-4. 
  54. ^ Bertrand Russell (1945), History of Western Philosophy, book 2, part 2, chapter X
  55. ^ Abdus Salam, H. R. Dalafi, Mohamed Hassan (1994). Renaissance of Sciences in Islamic Countries, p. 162. World Scientific, ISBN 9971-5-0713-7.
  56. ^ (Saliba 1994, pp. 245, 250, 256–257)
  57. ^ (Hobson 2004, p. 178)
  58. ^ Abid Ullah Jan (2006), After Fascism: Muslims and the struggle for self-determination, "Islam, the West, and the Question of Dominance", Pragmatic Publishings, ISBN 978-0-9733687-5-8.
  59. ^ Ahmad Y Hassan and Donald Routledge Hill (1986), Islamic Technology: An Illustrated History, p. 282, Cambridge University Press
  60. ^ Dallal, Ahmad (2010). Islam, science, and the challenge of history. Yale University Press. p. 12. ISBN 9780300159110. 
  61. ^ (Huff 2003)
  62. ^ Saliba, George (Autumn 1999). "Seeking the Origins of Modern Science? Review of Toby E. Huff, The Rise of Early Modern Science: Islam, China and the West". Bulletin of the Royal Institute for Inter-Faith Studies. 1 (2). Retrieved 2008-04-10. 
  63. ^ Will Durant (1980). The Age of Faith (The Story of Civilization, Volume 4), p. 162–186. Simon & Schuster. ISBN 0-671-01200-2.
  64. ^ Fielding H. Garrison, An Introduction to the History of Medicine: with Medical Chronology, Suggestions for Study and Biblographic Data, p. 86
  65. ^ Nasr, Hossein (1976). Islamic Science: An Illustrated Study. 978-0-905-03502-4. 
  66. ^ Lewis, Bernard (2001). What Went Wrong? : Western Impact and Middle Eastern Response. Oxford University Press. p. 79. ISBN 0-19-514420-1. 

References[edit]

  • Campbell, Donald (2001). Arabian Medicine and Its Influence on the Middle Ages. Routledge. (Reprint of the London, 1926 edition). ISBN 0-415-23188-4.
  • d'Alverny, Marie-Thérèse. "Translations and Translators", in Robert L. Benson and Giles Constable, eds., Renaissance and Renewal in the Twelfth Century, p. 421–462. Cambridge: Harvard Univ. Pr., 1982.
  • Hobson, John M. (2004). The Eastern Origins of Western Civilisation. Cambridge University Press. ISBN 0-521-54724-5. 
  • Huff, Toby E. (2003). "The Rise of Early Modern Science: Islam, China, and the West". Cambridge University Press. ISBN 0-521-52994-8. 
  • Joseph, George G. (2000). The Crest of the Peacock. Princeton University Press. ISBN 0-691-00659-8.
  • Katz, Victor J. (1998). A History of Mathematics: An Introduction. Addison Wesley. ISBN 0-321-01618-1.
  • Levere, Trevor Harvey (2001). Transforming Matter: A History of Chemistry from Alchemy to the Buckyball. Johns Hopkins University Press. ISBN 0-8018-6610-3. 
  • Linton, Christopher M. (2004). From Eudoxus to Einstein—A History of Mathematical Astronomy. Cambridge: Cambridge University Press. ISBN 978-0-521-82750-8. 
  • Masood, Ehsan (2009). Science and Islam A History. Icon Books. 
  • Morelon, Régis; Rashed, Roshdi (1996). Encyclopedia of the History of Arabic Science. 3. Routledge. ISBN 0-415-12410-7. 
  • Phillips, William D.; Carla Rahn Phillips; Jr. Phillips (1992). The Worlds of Christopher Columbus. Cambridge University Press. ISBN 0-521-44652-X. 
  • Sabra, A. I. (2000) "Situating Arab Science: Locality versus Essence," Isis, 87(1996):654–70; reprinted in Michael H. Shank, ed., The Scientific Enterprise in Antiquity and the Middle Ages," (Chicago: Univ. of Chicago Pr.), pp. 215–231.
  • Saliba, George (1994). A History of Arabic Astronomy: Planetary Theories During the Golden Age of Islam. New York University Press. ISBN 0-8147-8023-7. 
  • Turner, Howard R. (1997). Science in Medieval Islam: An Illustrated Introduction. University of Texas Press. ISBN 0-292-78149-0. 

Further reading[edit]

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External links[edit]