| Contributions of Ancient Arabian and Egyptian | | | | of the chemical treatment and the substance |
| Scientists on Chemistry | | | | chosen for this purpose; the substance being |
| Md. Wasim Aktar* and M. Paramasivam | | | | called the 'Noble Stone' or 'Philosopher's Stone'. |
| Deptt. of Agril. Chemicals, Bidhan Chandra Krishi | | | | This may be excrements, or blood, or hair, or |
| Viswavidyalaya, Mohanpur, Nadia, West Bengal, | | | | eggs, or anything else. After the substance has |
| India. | | | | been specified, it is treated along certain lines |
| Abstracts | | | | mentioned in their books. The result is an earthen |
| The modern chemistry is based on the findings | | | | or fluid substance which is called Elixir. These |
| and thinking of the people of historical age. If no | | | | chemists think that if Elixir is added to silver which |
| one knows the base and work of the previous on | | | | has been heated in a fire, the silver turns into |
| a subject, he or she could mere develop a new | | | | gold. If added to copper which had been heated in |
| thought or findings. For, a civilization must know | | | | a fire, the copper turns into silver. |
| its past. Hence, the present work is a small effort | | | | The question arises whether the metals are of |
| to find out the contribution of ancient Arabian and | | | | specific differences, each constituting a distinct |
| Egyptian scientists in the field of Chemistry. | | | | species, or whether they differ in certain |
| Different scientists of different school of thought, | | | | properties and qualities and constitute different |
| correlating different streams of science being | | | | kinds of one and the same species? |
| Chemistry as a main subject, are described in the | | | | Abü Nasr al-Färabi and |
| present work. | | | | his followers held the opinion that the difference in |
| Chemistry deals with the composition and | | | | metals is caused by certain conditions such as |
| properties of substances and the changes of | | | | humidity and dryness, softness and hardness, and |
| composition they undergo. It has been divided into | | | | colours such as yellow, white and black. According |
| Inorganic and Organic. The conception of this in | | | | to him the metals are different kinds of one and |
| modern Chemistry came from | | | | the same species. |
| al-Rãzi's classification of chemical | | | | On the other hand, Ibn Sina and his followers |
| substances into mineral, vegetable and animal. | | | | believed that metals have specific differences and |
| Inorganic Chemistry, deals with the preparation | | | | belong to different species, each of which has its |
| and properties of the elements, and their | | | | own differential and genus, like all other species. |
| compounds, originally arose from the study of | | | | According to Abü Nasr |
| minerals and metals, whereas Organic Chemistry, | | | | al-Färãbi, it is possible to |
| which deals with carbon compounds, developed | | | | transform one metal into another, because it is |
| through the investigation of animal and plant | | | | possible to change their conditions. |
| products. | | | | "Ibn Sinà thought that such transformation |
| Prior to 1828 it was not possible to synthesize | | | | was impossible. His assumption is based on the |
| organic substances from their elements and, | | | | fact that specific differences in metals cannot be |
| therefore, it was supposed that there existed | | | | changed by artificial means. He believed that since |
| fundamental difference between Organic and | | | | the metals are created by the Creator and |
| Inorganic Chemistry. In 1828 F. Wohler | | | | Determiner of things, God Almighty, and the |
| synthetically prepared urea, an organic substance; | | | | mystery of their real character was utterly |
| thereby revealing that there was no fundamental | | | | unknown and could not be perceived, any |
| difference between these two branches of | | | | attempt for transformation would be |
| Chemistry. Since carbon compounds were | | | | meaningless". (18) |
| numerous, their study separately made under | | | | Ancient Arabs' art of transformation of metals |
| Organic Chemistry, and study of elements and | | | | was based upon Hellenistic and Iranian traditions, |
| non-carbon compounds included in Inorganic | | | | but apparently the main principles and the main |
| Chemistry'. (1) | | | | operations were already established long before |
| The earliest discoveries in Inorganic Chemistry | | | | the 12th century. Before this century the Arabs |
| were made in metallurgy, Materia Medica, painting, | | | | had not only made many experiments, and |
| enameling, glazing, glass-making, arts, etc. These | | | | produced several works on this art, but they had |
| arts, and many metals, compounds and alloys | | | | begun to doubt and criticise the most advanced |
| were known to the Arabs. Similarly, the | | | | theories concerning it. This proves that the |
| discoveries in Organic Chemistry were made in | | | | standard of their chemical thinking was advanced. |
| the arts of dyeing, tanning, the manufacture of | | | | The 12th and 13th centuries added very little to |
| paper, in the study of fats, both of plant and | | | | their knowledge about the transformation of |
| animal origin, in medicine, etc. Thus Chemistry had | | | | metals, but their research continued in various |
| its sources in photo techniques, mineralogy, | | | | fields. The main chemical writer of this age was |
| metallurgy, Materia Medica and decorative arts. It | | | | Abu'l-Qãsim Muhammad al-Iraqi who |
| is the product of transmutation of baser metals | | | | flourished in the second half of the 13th century. |
| into goldand philosophical thoughts of practical or | | | | He was an experimenter and a theorist. His works |
| theoretical interest. Finally, it is the result of the | | | | represent the full development of the Arabic |
| study of the properties of the substances. | | | | doctrine. (19) |
| A Greek philosopher, Empedocles, held the view | | | | The 14th century was an enlightened period when |
| that all the four elements, air, water, earth and | | | | a group of intelligent writers began to reject the |
| fire, were the primal elements, and that the | | | | idea of transformation of metals by chemical |
| various substances were made by their | | | | means. One of such person was a historian, |
| intermixing. He regarded them to be distinct and | | | | Rashid al-Din who described such chemical practice |
| unchangeable. Aristotle considered these elements | | | | in Mongol Persia and expressed his distrust of |
| to be changeable i.e., one kind of matter could be | | | | such chemists. The large encyclopaedic work |
| changed into another kind. (2) | | | | Nukhbat al-Dahr of al-Dimashqi contains, in part |
| Jábir ibn Hayyãn | | | | second, much information on metal, their |
| (Liatinized as Geber), a great Arabian Chemist of | | | | properties, and influences. (19) As usual in Arabic |
| the 8th century A.C., modified the Aristotelian | | | | treatises, chemistry is mixed up with mineralogy |
| doctrine of the four elements, and presented the | | | | and geology. (20) |
| so-called sulphur-mercury theory of metals. | | | | Even in their purely chemical researches on |
| According to this theory metals differ essentially | | | | transformation of metals, the Arab chemists |
| because of different proportions of sulphur and | | | | achieved by no means unimportant results. In |
| mercury in them. He also formulated the theory | | | | their efforts to discover Elixir they often |
| of geologic formation of metals. | | | | discovered new chemical processes, and hit upon |
| Unlike his Greek predecessors, he did not merely | | | | the catalytic properties of various substances. |
| speculate, but performed experiments to reach | | | | The pains, which they took in the search of gold, |
| certain conclusions. He recognized and stated the | | | | ultimately resulted in their great contribution to the |
| importance of experimentation in Chemistry. He | | | | development of modern chemistry. |
| combined the theoretical knowledge of the | | | | The last important chemist of the 14th century |
| Greeks and practical knowledge of the craftsmen, | | | | was 'Izz al-Din 'Ali Ibn al- Jildaki. Some twenty |
| and himself made noteworthy advance both in | | | | treatises are ascribed to him. The list shows |
| the theory and practice of Chemistry. | | | | al-Jildaki's great activity as a chemical writer. A |
| Jâbir's contribution to Chemistry is | | | | complete study of his vast writings is necessary |
| very great. He gave a scientific description of two | | | | to know what he actually tried to establish. To |
| principle operations of Chemistry. One of them is | | | | some extent, this study was made by Ruska, |
| calcinations which is employed in the extraction of | | | | Stapleton, Holm yard, and their disciples. |
| metals from their ores. The other is reduction | | | | One of al-Jildaki's important books entitled |
| which is employed in numerous chemical | | | | Nihâyat al-Talab fi Sharh al-Muktasab |
| treatments. He improved upon the methods of | | | | contains many quotations from the earlier works, |
| evaporation, melting, distillation, sublimation and | | | | and some novelties, as the use of nitric acid to |
| crystallization. These are the fundamental | | | | extract silver out of the gold-silver alloy. Al- Jildaki |
| methods employed for the purification of chemical | | | | remarked that the substances do not react |
| substances, enabling the chemist to study their | | | | except by definite weights. (21) This is one of the |
| properties and uses, and to prepare them. The | | | | four fundamental laws of modern chemistry. |
| process of distillation is particularly applied for | | | | The ancient chemists applied their chemical |
| taking extract of plant material. | | | | knowledge to a large number of industrial arts. |
| In the opinion of JÃ bir the cultivation of | | | | Only three such arts are mentioned here, which |
| gold was not the only object of a chemist. The | | | | will enable the readers to estimate the extent of |
| preparation of new chemical substances was also | | | | their knowledge of Applied Chemistry. |
| regarded by him as the chief object of | | | | Paper: |
| Chemistry. We owe to him for the first | | | | Paper was invented by the Chinese who prepared |
| preparation of such substances as arsenic and | | | | it from the cocoon of the silkworm. Some |
| antimony from their sulphides, and basic lead | | | | specimens of Chinese paper extant date back to |
| carbonate. He also did important work in the | | | | the second century A.C. The first manufacture of |
| preparation of steel, and the refinement of | | | | the paper outside China occurred in Samarqand |
| metals. JÃ bir also deals with such | | | | (757). When Samarqand was captured by Arabs |
| applications as the use of manganese dioxide in | | | | the manufacture of paper spread over the whole |
| glass-making, varnishes to water-proof cloth and | | | | Arab world including the Maghrib. (Tunis, Morocco, |
| protect iron use of iron pyrites for writing in gold | | | | Algiers). |
| and distillation of vinegar to concentrate acetic | | | | By the end of the 12th century there were four |
| acid. | | | | hundred paper mills in Fasalone. In Spain the main |
| The most important discovery made by Jabir was | | | | centre of manufacture of paper was Shatiba |
| the preparation of sulphuric acid. The importance | | | | which remained a ancient Arab city until 1239. |
| of this discovery can be realized by the fact that | | | | Cordova was the centre of the business of paper |
| in this modern age the extent of the industrial | | | | in Spain. |
| progress of a country is mostly judged by the | | | | The Arabs developed this art. They prepared |
| amount of. sulphuric acid consumed in that | | | | paper not only from silk, but also from cotton, |
| country. Another important acid prepared by him | | | | rags and wood.In the middle of the 10th century |
| was nitric acid which he obtained by distilling a | | | | the paper industry was introduced in Spain. In |
| mixture of alum (of Yemen) and copper sulphate | | | | Khurasan paper was made of linen. |
| (of Cyprus). Then by dissolving ammonium | | | | There is an early treatise dealing with |
| chloride into this acid, he prepared aqua regia | | | | paper-making, the Umdat al-Kuttab wa 'Uddatu |
| which, unlike acids, could dissolve gold in it. | | | | dhawi'l-Albãb which is ascribed to the |
| Jabir classified chemical substances, on the basis | | | | Amir al- Mu'izz' Ibn Badis, a ruler of the Zayri |
| of some distinctive features, into bodies (gold, | | | | dynasty (1015-61) in Tunis. The 11th chapter of |
| silver, etc.) and souls (mercury, sulphur, etc.) to | | | | this treatise, dealing with paper, has been edited, |
| make the study of their properties easier. | | | | translated and elaborately discussed by the |
| Jãbir is the author of a large number | | | | foremost student of Arabic paper, Josef |
| of books on chemistry and a book on astrolabe. | | | | Karabacek. This work explains how to prepare |
| About one hundred chemical works ascribed to | | | | the pulp, make the sheets, wash and clean them, |
| him are extant. His fame chiefly rests on his | | | | colour, polish and paste them, and give them an |
| chemical books preserved in Arabic. (3) | | | | antique appearance. No text comparable to this in |
| We find that the author recognized and stated | | | | any other language of so early a date is known. |
| clearly the importance of experimentation more | | | | The preparation of pulp involves a large number |
| clearly than any other early chemist. He | | | | of complicated chemical processes, which shows |
| remarkably sound views on methods of chemical | | | | the advancement of the chemical knowledge of |
| research. It is impossible to reach definite | | | | the Arabs and Egyptians at that time. |
| conclusions regarding the extent of his | | | | The manufacture of writing-paper in Spain is one |
| contributions until all the Arabic writings ascribed to | | | | of the most beneficial contributions of Arabs to |
| him have been properly edited and studied. But on | | | | Europe. Without paper the scale on which popular |
| the basis of our present knowledge, Jabir appears | | | | education in Europe developed would have not |
| to be one of the greatest scientist whose | | | | been possible. The preparation of paper from silk |
| influence can be traced throughout the whole | | | | would have been impossible in Europe due to the |
| period of the historical development of the | | | | lack of silk production there. The Arabs method |
| Arabian and European chemistry. In the light of | | | | of producing paper from cotton could only be |
| these facts it would not be improper to call | | | | useful for the Europeans. After Spain the art of |
| Jãbir as the father of Chemistry. | | | | paper-making was established in Italy (1268-76). |
| Some of the chemical writings to which | | | | France owed its first paper mills to ancient Spain. |
| Jãbir's name is attached were | | | | From these countries the industry spread |
| translated into Latin. The first such version, the | | | | throughout Europe. |
| Book of the Composition of Alchemy was made | | | | Another type of paper; marbled paper, which was |
| by Robert of Chester in 1144. The Kitab al-Sab'in | | | | common upon end-papers, paper covers and |
| (the book of the seventy) was translated by | | | | edges of books, was prepared in the East, and |
| Gerard of Cremona in the 12th century'. The | | | | exported to the West. About the preparation of |
| translation of the Sum of Perfection was made | | | | marbled paper Roger Bacon tells us: "The Turks |
| by Richard Russell. One of his books has been | | | | have a pretty art of chamoletting of paper, which |
| translated into French by Berthelot. (4) | | | | is not with us in use. They take diverse oiled |
| Several technical terms have passed from | | | | colours, and put them severally (in drops) upon |
| Jãbir's Arabic writings through Latin | | | | water; and stirr the water lightly and then wet |
| into the European languages. Among these are | | | | their paper (being of some thickness) with it, and |
| realgar (red sulphide of arsenic), tutia (zinc oxide), | | | | the paper will be waved, and veined, like Chamolet |
| alkali, antimony, and alembic for distillation Vessel. | | | | or Marble'. |
| The Arabic equivalents for the last three words | | | | Books bound in the West towards the end of the |
| are alqali, ithmad, and al-'anbiq respectively. (5) | | | | 16th century are found with end-papers brought |
| Before Jãbir Ibn Hayyan, the | | | | from the East, but it was not until about a |
| Umayyad prince Khalid Ibn Yazid, who was a | | | | century later that European binders began to |
| philosopher, poet and chemist, encouraged Greek | | | | make them themselves. Hand-made marbled |
| philosophers in Egypt to translate Greek scientific | | | | papers are now rarely used, but more or less |
| works into Arabic. These were among the earliest | | | | clumsily reproduced imitations still serve various |
| translations in Arabic from other languages. He | | | | purposes. |
| was himself deeply interested in medicine, | | | | There is an Arabic word 'rizma' meaning a bundle |
| astrology and chemistry. Many chemical works | | | | of merchandise, which had been adopted in |
| are ascribed to him. One of them is entitled | | | | almost every Western language with slight |
| Firdaus al-Hikmah fi'Ilm al-Kimiya. This work was in | | | | variations to mean a bundle of paper (English: |
| verse, and contained 2,315 couplets. (6) | | | | ream). This also testifies to the Arabic origin of |
| An encyclopaedic scientist, and philosopher, Abu | | | | that business in the West. (22) |
| Yusuf Ya'qub al-Kindi considered the art of | | | | Tiles : |
| transformation of one metal into the other as an | | | | The industry of tile-making which involves a large |
| imposture. A few of 'his numerous works dealing | | | | number of complex technical and chemical |
| with many sciences are extant. One of his works | | | | processes, was highly developed by Arabs. The |
| is on pharmacy, a branch of applied chemistry. (7) | | | | earliest treatise, a Persian text, dealing with the |
| Chemistry was usually mixed up with mineralogy | | | | manufacture of faience, was unique of its kind in |
| and geology. The oldest Arabian lapidary which | | | | world literature until the 16th century. It has been |
| may serve as an important source of chemistry | | | | written by 'Abd Allah Ibn 'Ali Kà shà |
| was written by 'Utärid Ibn | | | | ni in the 13th century. This book entitled Jawahir |
| Muhammad al-Hãsib who flourished in | | | | al-'Arã'is Wa Aja'ib |
| the ninth century. It deals with the properties of | | | | al-Nafä'is was written on precious |
| precious stones. (8) | | | | stones and perfumes. It explains the manufacture |
| In the same century Jãbir's work | | | | of Faience, the ingredients (as clay, borax, |
| was further advanced by al-Räzi who | | | | feldspar, cobalt, lapis lazuli, lead, manganese, tin |
| wrote many chemical treatises, and described a | | | | etc.), their mixtures, the kiln processes and |
| number of chemical instruments. One of his | | | | implements, the methods of glazing and |
| treatises consists of 25 pieces of chemical | | | | decorating. This treatise is similar to the various |
| apparatus. He made investigations on specific | | | | other treatises on precious stones written in |
| gravity. One of his important works is on the art | | | | Arabic and Persian. The final chapter deals with |
| of transformation of baser metals into the noble | | | | the art of enamelled pottery. This account is |
| ones. He applied his chemical knowledge for | | | | specially valuable because it is based on actual and |
| medical purposes, thus laying the foundation of | | | | traditional practice. The maker of the beautiful |
| Iatrochemistry. (9) | | | | lustre 'mihrab' (arch) of the tomb of Imam |
| Other important chemists of this century were | | | | Yahyã (now in the Hermitage, |
| Dhu'l-Nün and al-Jà hiz. The | | | | Leningrad), dated 1305 A.C., Yusuf Ibn 'Ali Ibn |
| former mostly dealt with the art of transmutation | | | | Muhammad, was possibly a brother of the author. |
| of metals. (10) The latter prepared ammonia from | | | | (23) |
| animal offals by dry distillation. (11) | | | | Ceramics: |
| In the tenth century Ibn Wahshiyah wrote on | | | | The early history of Arabian and Egyptian |
| chemistry, His work may help to understand | | | | ceramics has not so far been written. Many |
| chemical symbolism. Maslamah Ibn Ahmad, an | | | | interesting specimens have been discovered in |
| astronomer, mathematician and oculist of this | | | | recent years which throw much light on the |
| century wrote two chemical works entitled, | | | | development of this industry in the Arab world. |
| Rutbat al-Hakim and Ghãyat al-Hakim. | | | | The centers of this industry were situated in |
| The second is well known in the Latin translation | | | | Persia, Mesopotamia, Syria, Egypt and Valencia |
| made in 1252 by the order of King Alfonso under | | | | from where various types spread rapidly |
| the title Picatrix. (12) | | | | throughout the Islamic Caliphate. |
| A Persian pharmacologist Abü | | | | Under Arabian influence the potters in these |
| Mansür Muwaffaq Ibn 'Ali al-Harawi | | | | Centers revived old technical processes, |
| who flourished in Herat in the tenth century, was | | | | developed new ones and began to experiment |
| apparently the first to think of compiling a treatise | | | | with decorative and ornamental schemes. The |
| on Materia Medica in Persian. He travelled | | | | Arabian potters readily absorbed progressive |
| extensively in Persia and India to obtain necessary | | | | ideas but atthe same time maintained great |
| information. He wrote, between 968 and 977, a | | | | originality. Two types of pottery were in common |
| book entitled Kitab al-Abniyah 'an | | | | use; enamelled and lustered. In enamelled pottery |
| Haqã'iq al-Adwiyah. It contains Greek, | | | | (the glazed earthenware) the Ancient s, from an |
| Syrian, Arabian, Persian, and Indian knowledge. It | | | | early period, were expert masters. In lustered |
| deals with 585 remedies (of which 466 are | | | | pottery also they made great progress. "In this |
| derived from plants, 75 from minerals, and 44 | | | | the design is painted in a metallic salt on a glazed |
| from animals). He classified them into four groups | | | | surface and fixed by firing in smike in a way that |
| according to their action, and gave the outline of a | | | | gives it a metallic gleam, which varies in different |
| general pharmacological theory. | | | | specimens from a bright copper-red to a |
| Abu Mansür distinguished between | | | | greenish- yellow tint, and in some cases throws |
| sodium carbonate (natrum) and potassium | | | | off brilliant iridescent reflections. (24) |
| carbonate (qali). He had some knowledge of | | | | In the last chapter of the Persian text Kitab |
| arsenious oxide, cupric oxide, silicic acid, antimony | | | | al-Jawähir' al-'Ara'is Wa |
| and so on. He knew the toxicological effects of | | | | 'Ajã'ib al-Nafa'is, the author describes |
| copper and lead compounds, the depilatory virtue | | | | the techniques of glazingwith two fires (lustres), |
| of quicklime, the composition of plaster of Paris | | | | leaf building, over glaze decoration fired in a muffle |
| and its surgical use. (13) | | | | kiln. (i.e.,separated from the flame, the source of |
| The greatest Arabian surgeon, Khalaf Ibn | | | | heat being outside), haf't rang, a Persian |
| 'Abbäs al-Zahrãwi (d. | | | | termreferring to the seven colours of the planets. |
| 1013) wrote a great medical encyclopaedia, | | | | There may be a reference to the polychrome |
| al-Tasrif in 30 sections, which contains interesting | | | | over glaze technique, the so called minai ware |
| methods of preparing drugs by sublimation and | | | | (another Persian term; mina-wash means lustre; |
| distillation, but its most important part is the | | | | mina coloured). The author indicates differences |
| surgical one. (14) | | | | between the art as practiced in Kashan, Baghdad |
| Abü Rayhan Muhammad | | | | and Tabriz. In Baghdad and Tabriz other kinds of |
| al-Birüni (973-1048) took a great | | | | firewood and potash were used. |
| interest in the determination of the specific | | | | In the 15th century the Arabian ceramic art was |
| gravity of eighteen precious stones and metals. A | | | | followed by Italian potters, who obtained much of |
| voluminous unedited lapidary by al- Biruni is extant | | | | the mature technical knowledge from Arab |
| in unique manuscript in the Escorial Library. It | | | | sources. This technical knowledge proved to be |
| contains a description of a great number of | | | | helpful in the revival of ceramic art during the |
| stones and metals from the natural, commercial, | | | | Renaissance. (25) |
| and medical point of view. Moreover, he | | | | REFERENCES :- |
| composed a pharmacology (saydalah).Important | | | | 1. Encyclopaedia Britannica, chicago, 1951, p.360 |
| information could certainly be obtained from his | | | | 2. Ibid., p. 355. |
| unedited works, on the origin of Indian and | | | | 3 Sarton George, Introduction to the History of |
| Chinese stones and drugs, which appeared in early | | | | Science, Washington, 1950, Vol I. p. 532. |
| Arabic scientific works. (15) | | | | 4. Wasiti, Hakim Nayyar, Tibb al-'Arab ( |
| Ibn Sinà wrote a treatise on minerals, which | | | | ãn Urdu Translation of Arabian |
| was very important and one of the main sources | | | | Medicine by Edward G. Browne), Lahore, 1954, p. |
| of geological knowledge, also a source of | | | | 26. |
| chemistry in Western Europe until the | | | | 5. Ibid. |
| Renaissance. | | | | 6. Hãji Khalifah, Kashf |
| As mentioned before, mineralogy stood in close | | | | al-Zunün, Istanbul, 1943. Vol., I, p. |
| relation to chemistry. Nearly fifty Arabic lapidaries | | | | 1254. |
| have been named. The best known of them is. | | | | Al-Zirakli, Khair al-Din, Al-'Alãm vol. II |
| the 'Flowers of Knowledge of Stones', by | | | | p. 342. |
| Shihà b al-Din al-Tifãshi (died in | | | | 7. Sarton, op. cit., p. 559. |
| Cairo in 1154). It gives in 25 chapters extensive | | | | 8. Ibid., p. 572. Al-Qifti, op. cit. p. 251. |
| information on the subject of the same number | | | | 9. Ibid., p. 271. Sarton, op. cit. p. 609. |
| of precious stones, their origin, geography, | | | | 10. lbid, p. 592. |
| examination, purity, price, application for medicinal | | | | 11. lbid, p. 597. |
| and magical purposes, and so on. Except for Pliny | | | | 12. Ibid., pp. 620, 668. |
| and the superior Aristotelian lapidary, he quotes | | | | 13. Ibid., p. 678. |
| only Arabic authors. (16) | | | | 14. Ibid., p. 681. |
| The output of the books on Chemistry was very | | | | 15 Ibid., p. 707. |
| great after the eleventh century. Thus, there are | | | | 16. Ibid, vol. II, part II, p. 650. |
| known books of about forty Arabic and Persian | | | | 17. Ibn Khaldun, Muqaddimah, English translation by |
| chemists. Ibn Khaldun, (d. 1406) the talented | | | | Frenz Rosenthal, London, 1957, vol. 3, p. 267. |
| Arabian philosopher of history and the greatest | | | | 18. Ibid. p. 278 |
| intellect of his century, was a violent opponent of | | | | 19. Haji. Khalifah, op. cit. p. 1936. |
| the idea of transmutation of metals by chemical | | | | 20. Sarton, op. cit vol. III, part I, p. 759. |
| means. (17) | | | | 21. Ibid. Vol. II, Part. II, p. 1045. |
| Some chemists thought that one metal can be | | | | 22. Sarton, op. cit., Vol. III, Part I, p. 321. |
| transformed into another by artificial methods. For | | | | 23. Sarton, op. cit vol. III , part I, p. 756. |
| such transformation they followed different | | | | 24 Arnold and Guillaume, op. cit. p. 125. |
| procedures depending on the character and form | | | | |