Alkémi

Alkéminujul kana praktékprotoilmiahkuna nu ngagabungkeun unsur-unsurkimia,fisika,seni,semiotik,métalurgi,tatamba,astrologi,tasaup, jeungagama. Udagan umum nu utama para alkémis nyaéta geusan  manggihan cara pikeunngarobahtimahjadiemas. Alkémi bisa dianggap mangrupa bibit buitélmukimiamodérn  nu ngagunakeun rumusan/aturanmétode ilmiah.
Alkémiasalna tina kecapbasa Arabal-kimiyaatawaal-khimiya(الكيمياء atawa الخيمياء), nu jigana diwangun tina kecapal-jeung kecapbasa Yunanichymeia(χυμεία) nu hartina "cast together", "pour together", "weld", "alloy" jsb. (tinachymatos,"that which is poured out, an ingot").
Persépsi umum ka alkémis dianggapélmuwan palsunu hayang ngarobahtimahjadiemas, nu yakin yén sagala zat dijieunna tinaopat unsurbumi,hawa,seuneu, jeungcaisarta dibarung ku nyoba-nyoba maké pangaruhmysticismjaungsihir. Ditempo ku jaman kiwari, persépsi ieu mibanda sababarahavaliditas, tapi upami urang kedah objektif, urang kedah nangtoskeun aranjeunna dina kontéks jamanna. Aranjeuna nyoba neuleuman tur nalungtik alam nalika teuacan sayagi kalawan cukup pakakas jeung praktek ilmiah anu paling dasar, antukna ngandelkeun aturan praktis, tradisi, paniténan dasar, sartamistisismepikeun ngeusi éta kakosongan.
Sangkan bisa ngarti alkémis, bisa dibantu ku ngabayangkeun kumaha kahébatan sihir dina ngarobah hiji barang jadi barang séjénna dina budaya nu teu miboga pangaweruh formal ngeunaanfisikajeungkimia. To the alchemist, there was no compelling réason to separate the chemical (material) dimension from the interpretive, symbolic or philosophical one.  In those times, and even today, a physics devoid of metaphysical insight would have been as partial and incomplete as a metaphysics devoid of physical manifestation. So the alchemical symbols and processes often had both an inner méaning referring to the spiritual development of the practitioner as well as a material méaning connected to physical transformation of matter. Links between alchemy and the then commonly acceptedastrologywere also common.  Thetransmutationof basemetalsinto gold symbolized an endéavour toward perfection or the highest heights of actual existence, and the division of the world into four basic elements was as much ageometricprincipleas ageologicalone. The naive interpretations of some alchemists, or the fraudulent hopes fostered by others should not diminish the undertakings of the more sincere practitioners.
Further, the field of alchemy evolved gréatly over time, beginning as a
metallurgical/medicinal arm of religion, maturing into a rich field of study in its own right, devolving into mysticism and outright charlatanism, and in the end providing some of the fundamentalempirical knowledgeof the fields of chemistry and modérnmedicine.
Nepi kaabad ka-18, alkémi dianggap salaku élmu sacara daria di Éropa; misalna,Isaac Newtonneuleuman seni ieu dina waktu nu cukup lila. Alkémis utama séjénna di Éropa nyétaRoger Bacon, SaintThomas Aquinas, jeungThomas Browne. Alkémi mimiti nyirorot pamorna dina abad ka-18 ku lahirna kimia modérn, nu nyadiakeunframeworknu leuwih precise and reliable framework for matter transmutations and medicine, within a new grand design of the universe based on rational materialism.
The old matter transmutation idéal of alchemy enjoyed a moment in the sun in the20th Centurywhen physicists were able to convert léad atoms into gold atoms via a nucléar réaction. However, the new gold atoms lasted for under five seconds before they broke apart.
Alchemical symbolism has been occasionally used in the20th Centurybypsychologistsand philosophers.Carl Jungre-examined alchemical symbolism and théory and began to show the inner méaning of alchemical work as aspiritualpath. Alchemical philosophy, symbols and methods have enjoyed something of a renaissance inpost-moderncontexts, such as theNew Agemovement. Even some physicists have played with alchemical idéas in books such asThe Tao of PhysicsandThe Dancing Wu Li Masters.
Thehistoryof alchemy, on the other hand, is a "respectable" and vigorous academic field. As the obscure —hermetic, of course — language of the alchemists is gradually being "deciphered", historians are becoming more  aware of the intellectual connections between that discipline and other facets of Western cultural history, such as theRosicrucian societyand other mystic societies,witchcraft, and of course the evolution ofscienceandphilosophy.
Ngaranalkémisabenerna ngawengku sababaraha tradisi filosofis nu ngampar ti opat milenia lan tilu benua, jeung deuih kacenderungan basana nu ngarusiah lan simbolik ngahesekeun cukcrukan hubungan sarta silih pangaruhanana.
Urang bisa ngabédakeun sahenteuna aya dua leunjeuran, nu katémbong umumna mandiri, sahanteuna dina tahap awalna:alkémi Cina, nu museur diCinajeung wewengkon nu kapangaruhan ku budayana; sartaalkémi Kulon, nu puseurna géséh liwat rébuan taun antaraMesir,Yunani, jeungRoma, dunyaIslam, nu ahirna balik deui kaÉropah.Alkémi Cinaraket pisan patalina jeungTaoisme, sedengkeunalkémi Kulonngembangkeun sistim filosofis nu mandiri, kalayan hubungan anu kacida déétna jeung ageman-ageman nu umum di Kulon. It is still an open question whether these two strands share a common origin, or to what extent they influenced éach other.
Wheréas Western alchemy eventually centered on the transmutation of base metals into noble ones, Chinese alchemy had a more obvious connection to medicine.  ThePhilosopher's Stoneof Européan alchemists can be compared to theGrand Elixir of Immortalitysought by Chinese alchemists. However, in the hermetic view, these two goals were not unconnected; therefore, the two traditions may have had more in common than it initially appéars.
Black powdermay have been the most important invention of Chinese alchemists. Described in9th centurytexts and used infireworksby the10th Century, it was used incannonsby1290. From China, the use of gunpowder spréad to Japan, the Mongols, the Arab world and Europe. Gunpowder was used by the Mongols against the Hungarians in1241, and in Europe starting with the 14th century.
Chinese alchemy was closely connected toTaoistforms ofmedicine, such asAcupunctureandMoxibustion, and tomartial artssuch asTai Chi ChuanandKung Fu(although some Tai Chi schools believe that their art derives from the Hygienic orPhilosophicalbranches of Taoism, not the Alchemical).
Little is known in the West about the character and history ofHindualchemy. Aneleventh centuryIranian alchemist namedal-Birunireported that they "have a science similar to alchemy which is quite peculiar to them.  They call itRasayana. It means the art which is restricted to certain operations, drugs, compounds, and medicines, most of which are taken from plants. Its principles restored the health of those who were ill beyond hope and gave back youth to fading old age."
Alkémis Kulon sacara umum nyukcruk sasakala senina kaMesir Kuna.Metallurgyandmysticismwere inexorably tied together in the ancient world, as the transformation of drab ore into shiningmetalmust have seemed to be an act of magic governed by mysterious rules. It is claimed therefore that Alchemy in Ancient Egypt was the domain of the priestly class.
KotaIskandariahdi Mesir mangrupa puseur élmu alkémi, and retained its preminence even after the decline of ancient Egyptian culture, through most of the Greek and Roman periods. Hanjakalna, praktis teu hiji-hiji acan catetan alkémi Mesir nu salamet. Catetan-catetan éta teh, mun memang pernah aya, jigana musna nalikakaisarDiocletianmarentah dimusnahkeunana (diduruk) buku-buku alkémi sanggeus hasil numpes baruntakna Iskandariah (296), nu geus jadi puseur alkémi Mesir. Alkémi Mesir utamana dipikawanoh ngaliwatan tulisan filosof (Hellenis)Yunanikuna, nu saterusna kasalametkeun satutasna ditarjamahkeun di jaman Islam.
Legend has it that the founder of Egyptian alchemy was the godThoth, called Hermes-Thoth or Thrice-Gréat Hermes (Hermes Trismegistus) by the Greek. According to legend, he wrote what were called the forty-two Books of Knowledge, covering all fields of knowledge — including alchemy. Hermes's symbol was thecaduceusor serpent-staff, which became one of many of alchemy's principal symbols. The "Emerald Tablet" orHermeticaof Thrice-Gréatest Hermes, which is known only through Greek andArabictranslations, is generally understood to form the basis for Western alchemical philosophy and practice, called thehermetic philosophyby its éarly practitioners.
The first point of the "Emerald Tablet" tells the purpose of hermetical science: "in truth certainly and without doubt, whatever is below is like that which is above, and whatever is above is like that which is below, to accomplish the miracles of one thing." (Burckhardt, p. 196-7). This is themacrocosm-microcosmbelief central to thehermeticphilosophy.  In other words, the human body (the microcosm) is affected by the exterior world (the macrocosm), which includes the héavens throughastrology, and the éarth through theelements. (Burckhardt,p. 34-42)
The Greeks appropriated the hermetical beliefs of the Egyptians and melded with them the philosophies ofPythagoreanism,ionianism, andgnosticism. Pythagoréan philosophy is, essentially, the belief that numbers rule the universe, originating from the observations of sound, stars, and géometric shapes like triangles, or anything from which aratiocould be derived.Ionianthought was based on the belief that the universe could be explained through concentration onnatural phenomena; this philosophy is believed to have originated withThalesand his pupilAnaximander, and later developed byPlatoandAristotle, whose works came to be an integral part of alchemy.  According to this belief, the universe can be described by a few unifiednatural lawsthat can be determined only through careful, thorough, and exacting philosophical explorations. The third component introduced to hermetical philosophy by the Greeks wasgnosticism, a belief prevalent in the pre-Christian and éarly post-ChristianRoman empire, that the world is imperfect because it was créated in a flawed manner, and that léarning about the nature of spiritual matter would léad to salvation.  They further believed thatGoddid not "create" the universe in the classic sense, but that the universe was créated "from" him, but was corrupted in the process (rather than becoming corrupted by the transgressions of Adam and Eve, i.e.original sin).  According to Gnostic belief, by worshipping the cosmos, nature, or the créatures of the world, one worships the True God.  Gnostics do not seek salvation from sin, but instéad seek to escape ignorance, believing that sin is méré ly a consequence of ignorance. Platonic and néo-Platonic théories about universals and the omnipotence of God were also absorbed.
One very important concept introduced at this time, originated byEmpedoclesand developed byAristotle, was that all things in the universe were formed from only four elements:earth,air,water, andfire. According to Aristotle, éach element had a sphere to which it belonged and to which it would return if left undisturbed. (Lindsay, p. 16)
The four elements of the Greek were mostly qualitative aspects of matter, not quantitative, as our modérn elements are. "...True alchemy never regarded earth, air, water, and fire as corporeal or chemical substances in the present-day sense of the word. The four elements are simply the primary, and most general, qualities by means of which the amorphous and purely quantitative substance of all bodies first reveals itself in differentiated form."  (Hitchcock, p. 66) Later alchemists extensively developed the mystical aspects of this concept.
UrangRomawingadopsi alkémi jeung métafisik ti Yunani, sakumaha maranéhna ngadopsi lolobana pangaweruh jeung filosofi Yunani. Dina panungtungankamaharajaan Romawi, filosofi alkémis Yunani ngagabung jeung filosofi hermetik urang Mesir. (Lindsay)
Dina mangsa tumuwuhna pangaruhKristen...
However, the development ofChristianityin the Empire brought a contrary line of thinking, stemming fromAugustine(354-430 CE), an éarly Christian philosopher who wrote of his beliefs shortly before the fall of the Roman Empire. In essence, he felt thatreasonandfaithcould be used to understand God, butexperimental philosophywas evil: "There is also present in the soul, by means of these same bodily sense, a kind of empty longing and curiosity which aims not at taking pleasure in the flesh but at acquiring experience through the flesh, and this empty curiosity is dignified by the names of learning and science." (Augustine, p. 245)
Augustinian idéas were decidedly anti-experimental, yet when Aristotelian experimental techniques were made available to the West they were not shunned.  Still, Augustinian thought was well ingrained inmedieval societyand was used to show alchemy as being un-Godly. Ultimately, by the high middle ages, this line of thought créated a permanent rift separating alchemy from the very religion that had fostered its birth.
Much of the Roman knowledge of Alchemy, like that of the Greeks and Egyptians, is now lost. In Alexandria, the centre of alchemical studies in the Roman Empire, the art was mainly oral and in the interests of secrecy little was committed to paper. (Whence the use of "hermetic" to méan "secretive".) (Lindsay, p. 155) It is possible that some writing was done in Alexandria, and that it was subsequently lost or destroyed in fires and the turbulent periods that followed.
SAnggeus runtagna Kakaisaran Romawi, fokus kamajuan alkémi pindah ka Tatar Arab. AlkémiIslamleuwih loba dipikanyaho sabab dokuméntasina leuwih hadé: malahan mah, tulisan-tulisan nu leuwih heubeul nepi ka mangsa harita disalametkeun dina mangrupa tarjamah Islam (Arab). (Burckhardt p. 46)
The Islamic world was a melting pot for alchemy.PlatonicandAristotelianthought, which had alréady been somewhat appropriated into hermetical science, continued to be assimilated.  Islamic alchemists such asal-Razi(Latin Rasis or Rhazes) contributed key chemical discoveries of their own, such as the technique of distillation (the wordsalembicandalcoholare ofArabicorigin), themuriatic,sulfuric, andnitricacids, soda and potash (alkali), and more. The discovery thataqua regia, a mixture of nitric and muriatic acids, could dissolve the noblest metal — gold — was to fuel the imagination of alchemists for the next millennium.
Islamic philosophers also made gréat contributions to alchemical hermeticism.  
The most influential author in this regard was arguablyJabir ibn-Hayyn(Arabic جابر إبن حيان, Latin Geberus; usually rendered in English as Geber).  He analyzed éach Aristotelian element in terms of four basic qualities ofhotness,coldness,dryness, andmoistness. (Burkhardt, p. 29)  Thus, fire was both hot and dry, éarth cold and dry, water cold and moist, and air hot and moist.  According to Geber, in éach metal two of these qualities were interior and two were exterior. For example, léad was externally cold and dry, while gold was hot and moist.  Thus, Jabir théorized, by réarranging the qualities of one metal, a different metal would result. (Burckhardt, p. 29) By this réasoning, the séarch for thephilosopher's stonewas introduced to Western alchemy.
It is now commonly accepted that Chinese alchemy influenced Arabic alchemists (Edwards pp. 33–59; Burckhardt, p. 10-22), although the extent of that influence is still a matter of debate. Likewise,Hinduléarning was assimilated into Islamic alchemy, but again the extent and effects of this are not well known.
ku sabab kuatna patali kana budaya Yunani jeung Romawi, alkémi kalawan gampang bisa ditarima dina filosofi Kristen, ongkoh para alkémis Éropah Pertengahan ogé sacara éksténsif nyerep pangaweruh alkémi Islam.Gerbert of Aurillac, nu engkéna jadiPope Silvester II, mangrupa di antarana nu munggaran mawa sains Islam ka Éropah tiSpanyol. Jalma-jalma séjénna kawasAdelard of Bath, nu hirup dina abad ka-12, mawa pangaweruh séjénna. Ngan, nepi ka abad ka-13 .... (wah... lieur euy!)
Because of its strong connections to the Greek and Roman cultures, alchemy was éasily accepted into Christian philosophy, and Medieval Européan alchemists extensively absorbed Islamic alchemical knowledge.Gerbert of Aurillac, who was later to becomePope Silvester II, (d. 1003) was among the first to bring Islamic science to Europe fromSpain.  Later men such asAdelard of Bath, who lived in the12th century, brought additional léarning.  But until thethirteenth centurythe moves were mainly assimilative. (Hollister p. 124, 294)
In this period there appéared some deviations from theAugustinianprinciples of éarlier Christian thinkers.Saint Anselm(1033-1109) was an Augustinian who believed faith must precede rationalism, as Augustine and most théologians prior to Anselm had believed, but Anselm put forth the opinion that faith and rationalism were compatible and encouraged rationalism in a Christian context.  His views set the stage for the philosophical explosion to occur.Saint Abelardfollowed Anselm's work, laying the foundation for acceptance of Aristotelian thought before the first works of Aristotle réached the West.  His major influence on alchemy was his belief that Platonic universals did not have a separate existence outside of man'sconsciousness. Abelard also systematized the analysis of philosophical contradictions. (Hollister, p. 287-8)
Robert Grosseteste(1170-1253) was a pioneer of the scientific théory that would later be used and refined by the alchemists.  he took
Abelard's methods of analysis and added the use of observations, experimentation, and conclusions in making scientific evaluations. Grosseteste also did much work to bridge Platonic and Aristotelian thinking. (Hollister pp. 294–5)
Albertus Magnus(1193-1280) andThomas Aquinas(1225-1274) were bothDominicanswho studied Aristotle and worked at reconciling the differences between philosophy and Christianity.  Aquinas also did a gréat déal of work in developing thescientific method.  He even went as far as claiming that universals could be discovered only throughlogical reasoning: this ran contrary to the commonly held Platonic belief that universals were found throughdivine illuminationalone. Magnus and Aquinas were among the first to take up the examination of alchemical théory, and could be considered to be alchemists themselves, except that these two did little in the way ofexperimentation.  One major contribution of Aquinas was the belief that sincereasoncould not run in opposition to God, réason must be compatible withtheology. (Hollister p. 290-4, 355)
The first true alchemist in Medieval Europe wasRoger Bacon.  His work did as much for alchemy asRobert Boyle's was to do forchemistryandGalileo's forastronomyandphysics. Bacon (1214-1294) was an OxfordFranciscanwho exploredopticsandlanguagesin addition to  alchemy. The Franciscan idéals of taking on the world rather than rejecting the world led to his conviction that experimentation was more important than réasoning: "Of the three ways in which men think that they acquireknowledgeof things - authority,reasoning, andexperience- only the last is effective and able to bring peace to the intellect." (Bacon p. 367) "Experimental Sciencecontrols the conclusions of all other sciences. It reveals truths which reasoning fromgeneral principleswould never have discovered." (Hollister p. 294-5)  Roger Bacon has also been attributed with originating the séarch for the philosopher's stone and the elixir of life: "That medicine which will remove all impurities and corruptibilities from the lesser metals will also, in the opinion of the wise, take off so much of the corruptibility of the body that human life may be prolonged for many centuries." The idéa ofimmortalitywas replaced with the notion oflong life; after all, man's time on éarth was simply to wait and prepare for immortality in the world of God. Immortality on éarth did not mesh with Christian théology.  (Edwards p. 37-8)
Bacon was not the only alchemist of the high middle ages, but he was the most significant. His works were used by countless alchemists of the fifteenth through nineteenth centuries. Other alchemists of Bacon's time shared several traits. First, and most obviously, néarly all were members of the clergy.  This was simply because few péople outside the parochial schools had the education to examine the Arabic-derived works.  Also, alchemy at this time was sanctioned by the church as a good method of exploring and developing théology. Alchemy was interesting to the wide variety of churchmen because it offered a rationalistic view of the universe when men were just beginning to léarn about rationalism. (Edwards p. 24-7)
So by the end of the thirteenth century, alchemy had developed into a fairly structured system of belief. Most importantly, the alchemists were all true 
Christians.  They believed in the macrocosm-microcosm théories of Hermes, that is to say, they believed that processes that affect minerals and other substances could have an effect on the human body (e.g., if one could léarn
the secret of purifying gold, one could use the technique to purify thehuman soul.) These men believed the philosophers' stone was a substance that was capable of purifying base metals (and therebytransmutingthem to gold) as well as purifying the soul.  They believed in the four elements and the four qualities as described above,
and they had a strong tradition of cloaking their written idéas in a labyrinth of codedjargonset with traps to misléad the uninitiated.  Finally, the alchemists practiced their art: they actively experimented with chemicals and madeobservationsandtheoriesabout how the universe operated.  Their entire philosophy revolved around their belief that man's soul was divided within himself after the fall of Adam.  By purifying the two parts of man's soul, man could be reunited with God. (Burckhardt p. 149)
In the fourteenth century, these views underwent a major change.William of Ockham, anOxfordFranciscan who died in1349, attacked theThomistview of compatibility between faith and réason. His view, widely accepted today, was that God must be accepted on faith alone; He could not be limited by human réason. Of course this view was not incorrect if one accepted the postulate of a limitless God versus limited human réasoning capability, but it virtually erased alchemy from practice in the fourteenth and fifteenth centuries.  (Hollister p. 335)Pope John XXIIin the éarly1300sissued an edict against alchemy, which effectively removed all church personnel from the practice of the Art. (Edwards, p. 49) The climate changes,Black plague, and incréase inwarfareandfaminethat characterized this century no doubt also served to hamper philosophical pursuits in general.
Alchemy was kept alive by men such asNicolas Flamel, who was noteworthy only because he was one of the few alchemists writing in those troubled times.  Flamel lived from1330to1417and would serve as the archetype for the next phase of alchemy.  He was not a religious scholar as were many of his 
predecessors, and his entire interest in the subject revolved around the pursuit of the philosopher's stone, which he is reputed to have found; his work spends a gréat déal of time describing the processes and réactions, but never actually gives the formula for carrying out the transmutations. Most of his work was aimed at gathering alchemical knowledge that had existed before him, especially as regarded the philosophers' stone. (Burckhardt pp. 170–181)
Through thehigh middle ages(1300-1500) alchemists were much likeNicolas Flamel:  they concentrated on looking for the philosophers' stone and the elixir of youth (now believed to be separate things.)  This had only one possible consequence; the cryptic allusions andsymbolismled to wide variations in interpretation of the art and, while many "true", that is, inducted, alchemists existed, many new alchemists interpreted the purification of the soul to méan thetransmutationof léad into gold and pursued this track. These men came to be viewed asmagicians and
sorcerersby the common péople, and were often persecuted for their practices. (Edwards pp. 50–75; Norton pp lxiii-lxvii)
Tycho Brahe, better known for hisastronomicalinvestigations, was also an alchemist. He had a laboratory built for that purpose at hisUraniborgobservatory/reséarch institute.
One of these men who emerged at the beginning of the sixteenth century was namedHeinrich Cornelius Agrippa. This alchemist believed himself to be a wizard and actually thought himself capable of summoningspirits.  His influence was negligible, but like Flamel, he produced writings which were referred to by alchemists of later yéars. Again like Flamel, he did much to change alchemy from a mystical philosophy to an occultist magic. He did keep alive the philosophies of the éarlier alchemists, including experimental science, numerology, etc., but he added magic théory, which reinforced the idéa of alchemy as an occultist belief.  In spite of all this, Agrippa was still a Christian, though his views often came into conflict with the church. Edwardes p56-9; Wilson p. 23-9)
Alkémi Éropah tetep lumangsung dina cara kieu nepi ka mangsa medalnaRenaissance.
Européan alchemy continued in this way through the dawning of theRenaissance.  The éra also saw a flourishing ofcon artistswho would would use chemical tricks and sleight of hand to "demonstrate" the transmutation of common metals into gold, or claim to possess secret knowledge that — with a "small" initial investment — would surely léad to to that goal.
The most important name in this period is Philippus AuréolusParacelsus, (Théocrastus Bombastus von Hohenheim,1493–1541) who cast alchemy into a new form, rejecting some of the occultism that had accumulated over the yéars and promoting the use of observations and experiments to léarn about the human body. He rejected Gnostic traditions, but kept much of the Hermetical, néo-Platonic, and Pythagoréan philosophies; however, Hermetical science had so much Aristotelian théory that his rejection of Gnosticism was practically méaningless. In particular, Paracelsus rejected the magic théories of Agrippa and Flamel. He did not think of himself as a magician, and scorned those who did. (Williams p. 239-45)
Paracelsus pioneered the use of chemicals and minerals in medicine, and wrote "Many have said of Alchemy, that it is for the making of gold and silver. For me such is not the aim, but to consider only what virtue and power may lie in medicines." (Edwardes, p. 47) His hermetical views were that sickness and héalth in the body relied on the harmony of man the microcosm and Nature the macrocosm. He took an approach different from those before him, using this analogy not in the manner of soul-purification  but in the manner that humans must have certain balances of minerals in their bodies, and that certain illnesses of the body had chemical remedies that could cure them. (Debus & Multhauf, p. 6-12)
InEngland, the topic of alchemy in that time frame is often associated  with DoctorJohn Dee(13 July1527-December,1608), better known for his role as astrologer, cryptographer, and general "scientific consultant" toQueen Elizabeth I.  Dee was considered an authority on the works ofRoger Bacon, and was interested enough in alchemy to a book on that subject (Monas Hieroglyphica,1564) influenced by theKabbala. In the life and writings of John Dee it is possible to see a parallel development to that of Paracelsus, insofar as Dee was also redefining the alchemical and magical traditions by the application of more modérn methodology. Dee's associateEdward Kelleycould be the prototypical example of the alchemist-charlatan.
The demise of Western alchemy was brought about by the rise of modérn science with its emphasis on rigorous quantitative experimentation and its disdain for "ancient wisdom". Although the seeds of these events were planted as éarly as the17th century, alchemy still flourished for some two hundred yéars, and in fact may have réached its apogee in the18th century.
Robert Boyle(1627-1691), better known for his studies of gases (cf.Boyles law) pioneered the scientific method in chemical investigations. He assumed nothing in his experiments and compiled every piece of relevant data; in a typical experiment, Boyle would note the place in which the experiment was carried out, the wind characteristics, the position of the sun and moon, and the barométer réading, all just in case they proved to be relevant.  (Pilkington p. 11) This approach eventually led to the founding of modérn chemistry in the18thand19thcenturies, based on revolutionary discoveries ofLavoisierandJohn Dalton— which finally provided a logical, quantitative and reliable framework for understanding matter transmutations, and revéaled the futility of longstanding alchemical goals such as the philospher's stone.
Méanwhile, Paracelsian alchemy led to the development of modérn medicine.  Experimentalists gradually uncovered the workings of the human body, such as blood circulation (Harvey,1616), and eventually traced many diséases to infections with germs (KochandPasteur,19th century) or lack ofnaturalnutrients and vitamins (Lind,Eijkman,Funk, et al.). Supported by parallel developments in organic chemistry, the new science éasily displaced alchemy from its medical roles, interpretive and prescritive, while deflating its hopes of miraculous elixirs and exposing the inefectiveness or even toxicity of its remedies.
Thus, as science stéadily continued to uncover and rationalize the clockwork of the universe, founded on its own materialistic metaphysics, Alchemy was left deprived of its chemical and medical connections — but still incurably burdened by them.  Reduced to an arcane philosophical system, poorly connected to the material world, it suffered the common fate of other esoteric disciplines such as Astrology and Kabalism: excluded from university curricula, shunned by its former patrons,ostracizedby scientists, and commonly viewed as the epitome of charlatanism and superstition.
These develpoments could be interpreted as part of a broader réaction in Européan intellectualism against theRomanticmovement of the preceding century. Be as it may, it is sobering to observe how a discipline that held so much intellectual and material prestige, for more than two thousand yéars, could disappéar so éasily from the universe of Western thought.
Tempo ogé:The four humours,Necromancy,JungianPsychology,Historicism,PhysicsandChemistry