DIGRESSION ON THE PASSAGE OF THE ARABIANS TO THEIR AGE OF REASON.

INFLUENCE OF MEDICAL IDEAS THROUGH THE NESTORIANS AND JEWS.

The military operations of the Arabians, described in Chapter XI., overthrew the Byzantine political system, prematurely closing the Age of Faith in the East; their intellectual procedure gave rise to an equally important result, being destined, in the end, to close the Age of Faith in the West. The Saracens not only destroyed the Italian offshoot, they also impressed characteristic lineaments on the Age of Reason in Europe.

Events so important make it necessary for me to turn aside from the special description of European intellectual advancement, and offer a digression on the passage of the Arabians to their Age of Reason. It is impossible for us to understand their action in the great drama about to be performed unless we understand the character they had assumed.

In a few centuries the fanatics of Mohammed had altogether changed their appearance. Great philosophers, physicians, mathematicians, astronomers, alchemists, grammarians, had arisen among them. Letters and science, in all their various departments, were cultivated.

A nation stirred to its profoundest depths by warlike emigration, and therefore ready to make, as soon as it reaches a period of repose, a rapid intellectual advance, may owe the path in which it is about to pass to those who are in the position of pointing it out, or of officiating as teachers. The teachers of the Saracens were the Nestorians and the Jews.

It has been remarked that Arabian science emerged out of medicine, and that in its cultivation physicians took the lead, its beginnings being in the pursuit of alchemy. In this chapter I have to describe the origin of these facts, and therefore must consider the state of Greek and Egyptian medicine, and relate how, wherever the Byzantine system could reach, true medical philosophy was displaced by relic and shrine-curing; and how it was, that while European ideas were in all directions reposing on the unsubstantial basis of the supernatural, those of the Saracens were resting on the solid foundation of a material support.

When the Arabs conquered Egypt, their conduct was that of bigoted fanatics; it justified the accusation made by some against them, that they burned the Alexandrian library for the purpose of heating the baths. But scarcely were they settled in their new dominion when they exhibited an extraordinary change. At once they became lovers and zealous cultivators of learning.

The Arab power had extended in two directions, and had been submitted to two influences. In Asia it had been exposed to the Nestorians, in Africa to the Jews, both of whom had suffered persecution at the hands of the Byzantine government, apparently for the same opinion as that which had now established itself by the sword of Mohammed. The doctrine of the unity of God was their common point of contact. On this they could readily affiliate, and hold in common detestation the trinitarian power at Constantinople. He who is suffering the penalties of the law as a heretic, or who is pursued by judicial persecution as a misbeliever, will readily consort with others reputed to cherish similar infidelities. Brought into unison in Asia with the Nestorians, and in Africa with the Alexandrian Jews, the Arabians became enthusiastic admirers of learning.

Not that there was between the three parties thus coalescing a complete harmony of sentiment in the theological direction; for, though the Nestorians and the Jews were willing to accept one-half of the Arabian dogma, that there is but one God, they could not altogether commit themselves to the other, that Mohammed is his Prophet. Perhaps estrangement on this point might have arisen, but fortunately a remarkable circumstance opened the way for a complete understanding between them. Almost from the beginning the Nestorians had devoted themselves to the study of medicine, and had paid much attention to the structure and diseases of the body of man; the Jews had long produced distinguished physicians. These medical studies presented, therefore, a neutral ground on which the three parties could intellectually unite in harmony; and so thoroughly did the Arabians affiliate with these their teachers, that they acquired from them a characteristic mental physiognomy. Their physicians were their great philosophers; their medical colleges were their foci of learning. While the Byzantines obliterated science in theology, the Saracens illuminated it by medicine.

When Constantine the Great and his successors, under ecclesiastical influence, had declared themselves the enemies of worldly learning, it became necessary for the clergy to assume the duty of seeing to the physical as well as the religious condition of the people. It was unsuited to the state of things that physicians, whose philosophical tendencies inclined them to the pagan party, should be any longer endured. Their education in the Asclepions imparted to them ideas in opposition to the new policy. An edict of Constantine suppressed those establishments, ample provision being, however, made for replacing them by others more agreeable to the genius of Christianity. Hospitals and Substitution of public charities. benevolent organizations were founded in the chief cities, and richly endowed with money and lands. In these merciful undertakings the empress-mother, Helena, was distinguished, her example being followed by many high-born ladies. The heart of women, which is naturally open to the desolate and afflicted, soon gives active expression to its sympathies when it is sanctified by Christian faith. In this, its legitimate direction, Christianity could display its matchless benevolence and charities. Organizations were introduced upon the most extensive and varied scale; one had charge of foundlings, another of orphans, another of the poor. We have already alluded to the parabolani or visitors, and of the manner in which they were diverted from their original intent.

But, noble as were these charities, they laboured under an essential defect in having substituted for educated physicians well-meaning but unskilful ecclesiastics. The destruction of the Asclepions was not attended by any suitably extensive measures for insuring professional education. The sick who were placed in the benevolent institutions were, at the best, rather under the care of kind nurses than under the advice of physicians; and the consequences are seen in the gradually increasing credulity and imposture of succeeding ages, until, at length, there was an almost universal reliance on miraculous interventions. Fetiches, said to be the relics of saints, but no better than those of tropical Africa, were believed to cure every disorder. To the shrines of saints crowds repaired as they had at one time to the temples of Æsculapius. The worshippers remained, though the name of the divinity was changed.

Scarcely were the Asclepions closed, the schools of philosophy prohibited, the libraries dispersed or destroyed, learning branded as magic or punished as treason, philosophers driven into exile and as a class exterminated, when it became apparent that a void had been created which it was incumbent on the victors to fill. Among the great prelates, who was there to stand in the place of those men whose achievements had glorified the human race? Who was to succeed to Archimedes, Hipparchus, Euclid, Herophilus, Eratosthenes? who to Plato and Aristotle? The quackeries of miracle-cure, shrine-cure, relic-cure, were destined to eclipse the genius of Hippocrates, and nearly two thousand years to intervene between Archimedes and Newton, nearly seventeen hundred between Hipparchus and Kepler. A dismal interval of almost twenty centuries parts Hero, whose first steam-engine revolved in the Serapion, from James Watt, who has revolutionized the industry of the world. What a fearful blank! Yet not a blank, for it had its products—hundreds of patristic folios filled with obsolete speculation, oppressing the shelves of antique libraries, enveloped in dust, and awaiting the worm.

Never was a more disastrous policy adopted than the Byzantine suppression of profane learning. It is scarcely possible now to realize the mental degradation produced when that system was at its height. Many of the noblest philosophical and scientific works of antiquity disappeared from the language in which they had been written, and were only recovered, for the use of later and better ages, from translations which the Saracens had made into Arabic. The insolent assumption of wisdom by those who held the sword crushed every intellectual aspiration. Yet, though triumphant for a time, this policy necessarily contained the seeds of its own ignominious destruction. A day must inevitably come when so grievous a wrong to the human race must be exposed, and execrated, and punished—a day in which the poems of Homer Insecurity of the Byzantine system. might once more be read, the immortal statues of the Greek sculptors find worshippers, and the demonstrations of Euclid a consenting intellect. But that unfortunate, that audacious policy of usurpation once entered upon, there was no going back. He who is infallible must needs be immutable. In its very nature the action implied compulsion, compulsion implied the possession of power, and the whole policy insured an explosion the moment that the means of compression should be weak.

It is said that when the Saracens captured Alexandria, their victorious general sent to the khalif to know his pleasure respecting the library. The answer was in the spirit of the age. "If the books be confirmatory of the Koran, they are superfluous; if contradictory, they are pernicious. Let them be burnt." At this moment, to all human appearance, the Mohammedan autocrat was on the point of joining in the evil policy of the Byzantine sovereign. But fortunately it was but the impulse of a moment, rectified forthwith, and a noble course of action was soon pursued. The Arab incorporated The nobler policy soon pursued. into his literature the wisdom of those he had conquered. In thus conceding to knowledge a free and unembarrassed career, and, instead of repressing, encouraging to the utmost all kinds of learning did the Koran take any harm? It was a high statesmanship which, almost from the beginning of the impulse from Mecca, bound down to a narrow, easily comprehended, and easily expressed dogma the exacted belief, and in all other particulars let the human mind go free.

In the preceding paragraphs I have criticized the course of events, condemning or applauding the actions and the actors as circumstances seem to require, herein following the usual course, which implies that men can control affairs, and that the agent is to be held responsible for his deed. We have, however, only to consider the course of our own lives to be satisfied to how limited an extent such is the case. We are, as we often say, the creatures of circumstances. In that expression there is a higher philosophy than might at first sight appear. Our actions are not the pure and unmingled results of our desires; they are the offspring of many various and mixed conditions. In that which seems to be the most voluntary decision there enters much that is altogether involuntary—more, perhaps, than we generally suppose. And, in like manner, those who are imagined to have exercised an irresponsible and spontaneous influence in determining public policy, and thereby fixing the fate of nations, will be found, when we understand their position more correctly, to have been the creatures of circumstances altogether independent and irrespective of them—circumstances which they never created, of whose influence they only availed themselves. They were placed in a current which drifted them irresistibly along.

From this more accurate point of view we should therefore consider the course of these events, recognizing the principle that the affairs of men pass forward in a determinate way, expanding and unfolding themselves. And hence we see that the things of which we have spoken as though they were matters of choice were, in reality, forced upon their apparent authors by the necessity of the times. But, in truth, they should be considered as the presentations of a certain phase of life which nations in their onward course sooner or later assume. In the individual, how well we know that a sober moderation of action, an appropriate gravity of demeanour, belong to the mature period of life; a change from the wanton wilfulness of youth, which may be ushered in, or its beginning marked, by many accidental incidents: in one perhaps by domestic bereavements, in another by the loss of fortune, in a third by ill health. We are correct enough in imputing to such trials the change of character, but we never deceive ourselves by supposing that it would have failed to take place had those incidents not occurred. There runs an irresistible destiny in the midst of all these vicissitudes.

We may therefore be satisfied that, whatever may have been the particular form of the events of which we have had occasion to speak, their order of succession was a matter of destiny, and altogether beyond the reach of any individual. We may condemn the Byzantine monarchs, or applaud the Arabian khalifs —our blame and our praise must be set at their proper value. Europe was passing from its Age of Inquiry to its Age of Faith. In such a transition the predestined underlies the voluntary. There are analogies between the life of a nation and that of an individual, who, though he may be in one respect the maker of his own fortunes for happiness or for misery, for good or for evil, though he remains here or goes there, as his inclinations prompt, though he does this or abstains from that as he chooses, is nevertheless held fast by an inexorable fate—a fate which brought him into the world involuntarily so far as he was concerned, which presses him forward through a definite career, the stages of which are absolutely invariable—infancy, childhood, youth, maturity, old age, with all their characteristic actions and passions, and which removes him from the scene at the appointed time, in most cases against his will. So also it is with nations; the voluntary is only the outward semblance, covering, but hardly hiding the predetermined. Over the events of life we may have control, but none whatever over the law of its progress. There is a geometry that applies to nations, an equation of their curve of advance. That no mortal man can touch.

We have now to examine in what manner the glimmering lamp of knowledge was sustained when it was all but ready to die out. By the Arabians it was handed down to us. The grotesque forms of some of those who took charge of it are not without interest. They exhibit a strange mixture of the Neo-platonist, the Pantheist, the Mohammedan, the Christian. In such untoward times, it was perhaps needful that the strongest passions of men should be excited and science stimulated by inquiries for methods of turning lead into gold, or of prolonging life indefinitely. We have now to deal with the philosopher's stone, the elixir vitÆ, the powder of projection, magical mirrors, perpetual lamps, the transmutation of metals. In smoky caverns under ground, where the great work is stealthily carried on, the alchemist and his familiar are busy with their alembics, cucurbites, and pelicans, maintaining their fires for so many years that salamanders are asserted to be born in them. Experimental science was thus restored, though under a very strange aspect, by the Arabians. Already it displayed its connexion with medicine—a connexion derived from the influence of the Nestorians and the Jews. It is necessary for us to consider briefly the relations of each, and of the Nestorians first.

In Chapter IX. we have related the rivalries of Cyril, the Bishop of Alexandria, and Nestorius, the Bishop of Constantinople. The theological point of their quarrel was whether it is right to regard the Virgin Mary as the mother of God. To an Egyptian still tainted with ancient superstition, there was nothing shocking in such a doctrine. His was the country of Isis. St. Cyril, who is to be looked upon as a mere ecclesiastical demagogue, found his purposes answered by adopting it without any scruple. But in Greece there still remained traces of the old philosophy. A recollection of the ideas of Plato had not altogether died out. There were some by whom it was not possible for the Egyptian doctrine to be received. Such, perhaps, was Nestorius, whose sincerity was finally approved by an endurance of persecutions, by his sufferings, and his death. He and his followers, insisting on the plain inference of the last verse of the first chapter of St. Matthew, together with the fifty-fifth and They deny the virginity of the queen of heaven. fifty-sixth verses of the thirteenth of the same Gospel, could never be brought to an acknowledgment of the perpetual virginity of the new queen of heaven. We have described the issue of the Council of Ephesus: the Egyptian faction gained the victory, the aid of court females being called in, and Nestorius, being deposed from his office, was driven, with his friends into exile. The philosophical tendency of the vanquished was soon indicated by their actions. While their leader was tormented in an African oasis, many of them emigrated to the Euphrates, and founded the ChaldÆan Church. Under its auspices the college at Edessa, with several connected schools, arose. In these were translated into Syriac many Greek and Latin works, as those of Aristotle and Pliny. It was the Nestorians who, in connexion with the Jews, founded the medical They begin to cultivate medicine.
The Arabs affiliate with them. college of Djondesabour, and first instituted a system of academical honours which has descended to our times. It was the Nestorians who were not only permitted by the khalifs the free exercise of their religion, but even intrusted with the education of the children of the great Mohammedan families, a liberality in striking contrast to the fanaticism of Europe. The Khalif Alraschid went so far as even to place all his public schools under the superintendence of John MasuÉ, one of that sect. Under the auspices of these learned men the Arabian academies were furnished with translations of Greek authors, and vast libraries were collected in Asia.

Through this connexion with the Arabs, Nestorian missionaries found means to disseminate their form of Christianity all over Asia, as far as Malabar and China. The successful intrigues of the Egyptian politicians at Ephesus had no influence in those remote countries, the Asiatic churches of the Nestorian and Jacobite persuasions outnumbering eventually all the European Christians of the Greek and Roman churches combined. In later times the papal government has made great exertions to bring about an understanding with them, but in vain.

The expulsion of this party from Constantinople was accomplished by the same persons and policy concerned in destroying philosophy in Alexandria. St. Cyril was the representative of an illiterate and unscrupulous faction that had come into the possession of power through intrigues with the females of the imperial court, and bribery of eunuchs and parasites. The same spirit that had murdered Hypatia tormented Nestorius to death. Of the contending parties, one was respectable and had a tincture of learning, the other ignorant, and not hesitating at the employment of brute force, deportation, assassination. Unfortunately for the world, the unscrupulous party carried the day.

By their descent, the Nestorians had become the depositaries of the old Greek medical science. Its great names they revered. They collected, with the utmost assiduity, whatever works remained on medical topics, whether of a Greek or Alexandrian origin, from the writings of Hippocrates, called, with affectionate veneration by his successors, "The Divine Old Man," down to those of the Ptolemaic school.

Greek medicine arose in the temples of Æsculapius, whither the sick were in the habit of resorting for the assistance of the god. It does not appear that any fee was exacted for the celestial advice; but the gratitude of the patient was frequently displayed by optional gifts, and votive tablets presented to the temple, setting forth the circumstances of the case, were of value to those disposed to enter on medical studies. The Asclepions thus became both hospitals and schools. They exercised, from their position, a tendency to incorporate medical and ecclesiastical pursuits. At this time it was universally believed that every sickness was due to the anger of some offended god, and especially was this supposed to be the case in epidemics and plagues. Such a paralyzing notion was necessarily inconsistent with any attempt at the relief of communities by the exercise of sanitary measures. In our times it is still difficult to remove from the minds of the illiterate classes this ancient opinion, or to convince them that under such visitations we ought to help ourselves, and not expect relief by penance and supplications, unless we join therewith rigorous personal, domestic, municipal Hippocrates destroys the theological theory of disease. cleanliness, fresh air, and light. The theological doctrine of the nature of disease indicated its means of cure. For Hippocrates was reserved the great glory of destroying them both, replacing them by more practical and material ideas, and, from the votive tablets, traditions, and other sources, together with his own admirable observations, compiling a body of medicine. The necessary consequence of his great success was the separation of the pursuits of the physician from those of the priest. Not that so great a revolution, implying the diversion of profitable gains from the ancient channel, could have been accomplished without a struggle. We should reverence the memory of Hippocrates for the complete manner in which he effected that object.

Of the works attributed to Hippocrates, many are doubtless the production of his family, his descendants, or his pupils. The inducements to literary forgery in the times of the Ptolemies, who paid very high prices for books of reputation, have been the cause of much difficulty among critics in determining such questions of authorship. The works indisputably written by Hippocrates display an extent of knowledge answering to the authority of his name; his vivid descriptions have never been excelled, if indeed they have ever been equalled. The Hippocratic face of the dying is still retained in our medical treatises in the original terms, without any improvement.

In his medical doctrine, Hippocrates starts with the postulate that the body is composed of the four elements. From these are formed the four cardinal humours. He thinks that the humours are liable to undergo change; that health consists in their right constitution and proper adjustment as to quantity; disease, in their impurities and inequalities; that the disordered humours undergo spontaneous changes or coction, a process requiring time, and hence the explanation of critical days and critical discharges. The primitive disturbance of the humours he attributed to a great variety of causes, chiefly to the influence of physical circumstances, such as heat, cold, air, water. Unlike his contemporaries, he did not impute all the afflictions of man to the anger of the gods. Along with those influences of an external kind, he studied the special peculiarities of the human system, how it is modified by climate and manner of life, exhibiting different predispositions at different seasons of the year. He believed that the innate heat of the body varies with the period of life, being greatest in infancy and least in old age, and that hence morbific agents affect us with greater or less facility at different times. For this reason it is that the physician should attend very closely to the condition of those in whom he is interested as respects their diet and exercise, for thereby he is able not only to regulate their general susceptibility, but also to exert a control over the course of their diseases.

Referring diseases in general to the condition or distribution of the humours, for he regards inflammation as the passing of blood into parts not previously containing it, he considers that so long as those liquids occupy the system in an unnatural or adulterated state, disease continues; but as they ferment or undergo coction, various characteristic symptoms appear, and, when their elaboration is completed, they are discharged by perspiration or other secretions, by alvine dejections, etc. But where such a general relief of the system is not accomplished, the peccant humours may be localized in some particular organ or special portion, and erysipelatous inflammation, mortification, or other such manifestations ensue. It is in aiding this elimination from the system that the physician may signally manifest his skill. His power is displayed much more at this epoch than by the control he can exert over the process of coction. Now may he invoke the virtues of the hellebores, the white and the black, now may he use elaterium. The critical days which answer to the periods of the process of coction are to be watched with anxiety, and the correspondence of the state of the patient with the expected condition which he ought to show at those epochs ascertained. Hence the physician may be able to predict the probable course of the disease during the remainder of its career, and gather true notions as to the practice it would be best for him to pursue to aid Nature in her operations.

It thus appears that the practice of medicine in the hands of Hippocrates had reference rather to the course or career of disease than to its special nature. Nothing more than this masterly conception is wanted to impress us with his surprizing scientific power. He watches the manner in which the humours are undergoing their fermenting coction, the phenomena displayed in the critical days, the aspect and nature of the critical discharges. He does not attempt to check the process going on, but simply to assist the natural operation.

When we consider the period at which Hippocrates lived, B.C. 400, and the circumstances under which he had studied medicine, we cannot fail to admire the very great advance he made. His merit is conspicuous in rejecting the superstitious tendency of his times by teaching his disciples to impute a proper agency to physical causes. He altogether discarded the imaginary influences then in vogue. For the gods he substituted, with singular felicity, Impersonal Nature. It was the interest of those who were connected with the temples of Æsculapius to refer all the diseases of men to supernatural agency; their doctrine being that every affliction should be attributed to the anger of some offended god, and restoration to health most certainly procured by conciliating his power. So far, then, as such interests were concerned, any contradiction of those doctrines, any substitution of the material for the supernatural, must needs have met with reprehension. Yet such opposition seems in no respect to have weighed with this great physician, who developed his theory and pursued his practice without giving himself any concern in that respect. He bequeathed an example to all who succeeded him in his noble profession, and taught them not to hesitate in encountering the prejudices and passions of the present for the sake of the truth, and to trust for their reward in the just appreciation of a future age.

With such remarks we may assert that the medical philosophy of Hippocrates is worthy of our highest admiration, since it exhibits the scientific conditions of deduction and induction. The theory itself is compact and clear; its lineaments are completely Grecian. It presents, to one who will contemplate it with due allowance for its times, the characteristic quick-sightedness, penetration, and power of the Greek mind, fully vindicating for its author the title which has been conferred upon him by his European successors—the Father of Medicine—and perhaps inducing us to excuse the enthusiastic assertion of Galen, that we ought to reverence the words of Hippocrates as the voice of God.

The Hippocratic school of Cos found a rival in the school of Cnidos, which offered not only a different view of the nature of disease, but also taught a different principle for its cure. The Cnidians paid more particular attention to the special symptoms in individual cases, and pursued a less active treatment, declining, whenever they could, a resort to drastic purgatives, venesection, or other energetic means. As might be expected, the professional activity of these schools called into existence many able men, and produced many excellent works: thus Philiston wrote on the regimen for persons in health; Diocles on hygiene and gymnastics; Praxagoras Is destroyed by Constantine. on the pulse, showing that it is a measure of the force of disease. The Asclepion of Cnidos continued until the time of Constantine, when it was destroyed along with many other pagan establishments. The union between the priesthood and the profession was gradually becoming less and less close; and, as the latter thus separated itself, divisions or departments arose in it, both as regards subjects, such as pharmacy, surgery, etc., and also as respects the position of its cultivators, some pursuing it as a liberal science, and some as a mere industrial occupation. In those times, as in our own, many who were not favoured with the gifts of fortune were constrained to fall into the latter ranks. Classes of physicians. Thus Aristotle, than whom few have ever exerted a greater intellectual influence upon humanity, after spending his patrimony in liberal pursuits, kept an apothecary's shop at Athens. Aristotle the druggist, behind his counter, selling medicines to chance customers, is Aristotle the great writer, whose dictum was final with the schoolmen of the Middle Ages. As a general thing, however, the medical professors were drawn from the philosophical class. Outside of these divisions, and though in all ages continually repudiated by the profession, yet continually hovering round it, was a host of impostors and quacks, as there will always be so long as there are weak-minded and shallow men to be deluded, and vain and silly women to believe.

When the Alexandrian Museum was originated by Ptolemy Philadelphus, its studies were arranged in four faculties—literature, mathematics, astronomy, medicine. These divisions are, however, to be understood comprehensively: thus, under the faculty of medicine were included such subjects as natural history. The physicians who received the first appointments were Cleombrotus, Herophilus, and Erasistratus; among the subordinate professors was Philo-Stephanus, who had charge of natural history, and was directed to write a book on Fishes. The elevated ideas of the founder Philadelphus founds medicine on anatomy.
He authorizes dissection and human vivisection.
Physicians of the Alexandrian school. cannot be better illustrated than by the manner in which he organized his medical school. It was upon the sure basis of anatomy. Herophilus and his colleagues were authorized to resort to the dissection of the dead, and to ascertain, by that only trustworthy method, the true structure of the human body. The strong hand of Ptolemy resolutely carried out his design, though in a country where popular sentiment was strongly opposed to such practices. To touch a corpse in Egypt was an abomination. Nor was it only this great man's intention to ascertain the human structure; he also took measures to discover the mode in which its functions are carried forward, the manner in which it works. To this end he authorized his anatomists to make vivisections both of animals, and also of criminals who had been condemned to death, herein finding for himself that royal road in physiology which Euclid once told him, at a dinner in the Museum, did not exist in geometry, and defending the act from moral criticism by the plea that, as the culprits had already forfeited their lives to the law, it was no injury to make them serviceable to the interests of humanity. Herophilus had been educated at Cos; his pathological views were those known as humouralism; his treatment active, after the manner of Hippocrates, upon whose works he wrote commentaries. His original investigations were numerous; they were embodied, with his peculiar views, in treatises on the practice of medicine; on obstetrics; on the eye; on the pulse, which he properly referred to contractions of the heart. He was aware of the existence of the lacteals, and their anatomical relation to the mesenteric glands. Erasistratus, his colleague, was a pupil of Theophrastus and Chrysippus: he, too, cultivated anatomy. He described the structure of the heart, its connexions with the arteries and veins, but fell into the mistake that the former vessels were for the conveyance of air, the latter for that of blood. He knew that there are two kinds of nerves, those of motion and those of sensation. He referred all fevers to inflammatory states, and in his practice differed from the received methods of Hippocrates by observing a less active treatment.

By these physicians the study of medicine in Alexandria was laid upon the solid foundation of anatomy. Besides them there were many other instructors in specialties; and, indeed, the temple of Serapis was used for a hospital, the sick being received into it, and persons studying medicine admitted for the purpose of familiarizing themselves with the appearance of disease, precisely as in similar institutions at the present time. Of course, under such circumstances, the departments of surgery and pharmacy received many improvements, and produced many able men. Among these improvements may be mentioned new operations, for lithotomy, instruments for crushing calculi, for reducing dislocations, etc. The active commerce of Egypt afforded abundant opportunity for extending the materia medica by the introduction of a great many herbs and drugs.

The medical school of Alexandria, which was thus originally based upon dissection, in the course of time lost much of its scientific spirit. But the influence of the first teachers may be traced through many subsequent ages. Thus Galen divides the profession in his time into Herophilians and Erasistratians. Various sects had arisen in the course of events, as the Dogmatists, who asserted that diseases can only be treated correctly by the aid of a knowledge of the structure and functions, the action of drugs, and the changes induced in the affected parts; they insisted, therefore, upon the necessity of anatomy, physiology, therapeutics, and pathology. They claimed a descent from Hippocrates. Their antagonists, the Empirics, ridiculed such knowledge as fanciful or unattainable, and relied on experience alone. These subdivisions were not limited to sects; they may also be observed under the form of schools. Even Erasistratus himself, toward the close of his life, through some dispute or misunderstanding, appears to have left the Museum and established a school at Smyrna. The study of the various branches of medicine was also pursued by others out of the immediate ranks of the profession. Mithridates, king of Pontus, thus devoted himself to the examination of poisons and the discovery of antidotes.

What a fall from this scientific medicine to the miracle-cure which soon displaced it! What a descent from Hippocrates and the great Alexandrian physicians to the shrines of saints and the monks!

To the foregoing sketch of the state of Greek medicine in its day of glory, I must add an examination of the same science among the Jews subsequently to the second century; it is necessary for the proper understanding of the origin of Saracen learning.

In philosophy the Jews had been gradually emancipating themselves from the influence of ancient traditions; their advance in this direction is shown by the active manner in which they aided in the development of Neo-platonism. After the destruction of Jerusalem all Syria and Mesopotamia were full of Jewish schools; but the great philosophers, as well as the great merchants of the nation, were residents of Alexandria. Persecution and dispersion, if they served no other good purpose, weakened the grasp of the ecclesiastic. Perhaps, too, repeated disappointments in an expected coming of a national temporal Messiah had brought those who were now advanced in intellectual progress to a just appreciation of ancient traditions. In this mental emancipation their physicians took the lead. For long, while their pursuits were yet in infancy, a bitter animosity had been manifested toward them by the Levites, whose manner of healing was by prayer, expiatory sacrifice, and miracle; or, if they descended to less supernatural means, by an application of such remedies as are popular with the vulgar everywhere. Thus, to a person bitten by a mad dog, they would give the diaphragm of a dog to eat. As examples of a class of men soon to take no obscure share in directing human progress may be mentioned Hannina, A.D. 205, often spoken of by his successors as the earliest of Jewish physicians; Samuel, equally distinguished as an astronomer, accoucheur, and oculist, the inventor of a collyrium which bore his name; Rab, an anatomist, who wrote a treatise on the structure of the body of man as ascertained by dissections, thereby attaining such celebrity that the people, after his death, used the earth of his grave as a medicine; Abba Oumna, whose study of insanity plainly shows that he gave a material interpretation to the national doctrine of possession by devils, and replaced that strange delusion by the scientific explanation of corporeal derangement. This honourable physician made it a rule never to take a fee from the poor, and never to make any difference in his assiduous attention between them and the rich. These men may be taken as a type of their successors to the seventh century, when the Oriental schools were broken up in consequence of the Arab military movements. In the Talmudic literature there are all the indications of a transitional state, so far as medicine is concerned; the supernatural seems to be passing into the physical, the ecclesiastical is mixed up with the exact: thus a rabbi may cure disease by the ecclesiastical operation of laying on of hands; but of febrile disturbances, an exact, though erroneous explanation is given, and paralysis of the hind legs of an animal is correctly referred to the pressure of a tumour on the spinal cord. Some of its aphorisms are not devoid of amusing significance: "Any disease, provided the bowels remain open; any kind of pain, provided the heart remain unaffected; any kind of uneasiness, provided the head be not attacked; all manner of evils, except it be a bad woman."

At first, after the fall of the Alexandrian school, it was all that the Jewish physicians could do to preserve the learning that had descended to them. But when the tumult of Arabic conquest was over, we find them becoming the advisers of crowned heads, and exerting, by reason of their advantageous position, their liberal education, their enlarged views, a most important influence on the intellectual progress of humanity. Maser Djaivah, physician to the Khalif Moawiyah, was distinguished at once as a poet, a critic, a philosopher; Haroun, a physician of Alexandria, whose Pandects, a treatise unfortunately now lost, are said to have contained the first elaborate description of the small-pox and method of its treatment. Isaac Ben Emran wrote an original treatise on poisons and their symptoms, and others followed his example. The Khalif Al Raschid, who maintained political relations with Charlemagne by means of Jewish envoys, They found medical colleges, set that monarch an example by which indeed he was not slow to profit, in actively patronising the medical college at Djondesabour, and founding a university at Bagdad. He prohibited any person from practising medicine until after a satisfactory examination before one of those faculties. In the East the theological theory of disease and of its cure was fast passing away. Of the school at Bagdad, Joshua ben Nun is said to have been the most celebrated professor, the school itself actively promoting the translation of Greek works into Arabic—not and promote science and literature. alone works of a professional, but also those of a general kind. In this manner the writings of Plato and Aristotle were secured; indeed, it is said that almost every day camels laden with volumes were entering the gates of Bagdad. To add to the supply, the Emperor Michael III. was compelled by treaty to furnish Greek books. The result of this intellectual movement could be no other than a diffusion of light. Schools arose in Bassora, Ispahan, Samarcand, Fez, Morocco, Sicily, Cordova, Seville, Granada.

Through the Nestorians and the Jews the Arabs thus became acquainted with the medical science of Greece and Alexandria; but to this was added other knowledge of a more sinister kind, derived from Persia, or perhaps remotely from Chaldee sources, the Nestorians having important Church establishments in Mesopotamia, and the Jews having been long familiar with that country; indeed, from thence their ancestors originally came. More than once its ideas had modified their national religion. This extraneous knowledge was of an astrological or magical nature, carried into practice by incantations, amulets, charms, and talismans. Dedication of portions of matter and time to the supernatural. Its fundamental principle was that the planetary bodies exercise an influence over terrestrial things. As seven planets and seven metals were at that time known—the sun, the moon, Mars, Mercury, Jupiter, Venus, Saturn, being the planets of astrology—a due allotment was made. Gold was held sacred to the sun, silver to the moon, iron to Mars, etc. Even the portions of time were in like manner dedicated; the seven days of the week were respectively given to the seven planets of astrology. The names imposed on those days, and the order in which they occur, are obviously connected with the Ptolemaic hypothesis Origin of the week. of astronomy, each of the planets having an hour assigned to it in its order of occurrence, and the planet ruling first the hour of each day giving its name to that day. Thus arranged, the week is a remarkable instance of the longevity of an institution adapted to the wants of man. It has survived through many changes of empire, has forced itself on the ecclesiastical system of Europe, which, unable to change its idolatrous aspect, has encouraged the vulgar error that it owes its authenticity to the Holy Scriptures, an error too plainly betrayed by the pagan names that the days bear, and also by their order of occurrence.

These notions of dedicating portions of matter or of time to the supernatural were derived from the doctrine of a universal spirit or soul of the world, extensively believed in throughout the East. It underlies, as we have seen in Chapter III., all Oriental theology, and is at once a very antique and not unphilosophical conception. Of this soul the spirit of man was by many supposed to be a particle like a spark given off from a flame. All other things, animate or inanimate, brutes, plants, stones, nay, even natural forms, rivers, mountains, cascades, grottoes, have each an indwelling and animating spirit.

Amulets and charms, therefore, did not derive their powers from the material substance of which they consisted, but from this indwelling spirit. In the case of man, his immaterial principle was believed to correspond to his personal bodily form. Of the two great sects into which the Jewish nation had been divided, the Pharisees accepted the Assyrian doctrine; but the Sadducees, who denied the existence of any such spirit, boasted that theirs was the old Mosaic faith, and denounced their antagonists as having been contaminated at the time of the Babylonian captivity, before which catastrophe, according to them, these doctrines were unheard of in Jerusalem. In Alexandria, among the Alexandrian necromancy. leading men there were many adherents to these opinions. Thus Plotinus wrote a book on the association of dÆmons with men, and his disciple Porphyry proved practically the possibility of such an alliance; for, repairing to the temple of Isis along with Plotinus and a certain Egyptian priest, the latter, to prove his supernatural power, offered to raise up the spirit of Plotinus himself in a visible form. A magical circle was drawn on the ground, surrounded with the customary astrological signs, the invocation commenced, the spirit appeared, and Plotinus stood face to face with his own soul. In this successful experiment it is needless to inquire how much the necromancer depended upon optical contrivances, and how much upon an alarmed imagination. But if thus the spirit of a living man could be called up, how much more likely the souls of the dead.

In reality, these wild doctrines were connected with Pantheism, which was secretly believed in everywhere; for, though, in a coarse mode of expression, a distinction seemed thus to be made between matter and spirit, or body and soul, it was held by the initiated that matter itself is a mere shadow of the spirit, and the body a delusive semblance of the soul.

In the eighth century, many natural facts of a surprising and unaccountable description, well calculated to make a profound impression upon those who witnessed them, had accumulated. They were such as are now familiar to chemists. Vessels tightly closed were burst open when tormented in the fire, apparently by some invisible agency; intangible vapours condensed into solids; from colourless liquids gaudy precipitates were suddenly called into existence; flames were disengaged without any adequate cause; explosions took place spontaneously. So much that was unexpected and unaccountable justified the title of "the occult science," "the black art." From being isolated marvels unconnected with one another, these facts had been united. The Chaldee notions of a soul of the world, and of indwelling spirits, had furnished a thread on which all these pearls, for such they proved to be, might be strung.

With avidity—for there is ever a charm in the supernatural—did the Arabs receive from their Nestorian and Jewish medical instructors these mystical interpretations along with true knowledge. And far from resting satisfied with what their masters had thus delivered, they proceeded forthwith to improve and extend it for themselves. They submitted all kinds of substances to all kinds of operations, greatly improving the experimental process they had been taught. By exposing various bodies to the fire, they found it possible to extract from them more refined portions, which seemed to concentrate in themselves the qualities pertaining in a more diffuse way to the substances from which they had been drawn. These, since they were often invisible at their first disengagement, yet capable of bursting open the strongest vessels, and sometimes of disappearing in explosions and flames, they concluded must be the indwelling spirit or soul of the body, from which the fire had driven them forth. It was the Chaldee doctrine realized. Thus they obtained the spirit of wine, the spirit of salt, the spirit of nitre. We still retain in commerce these designations, though their significance is lost. When first introduced they had a strictly literal meaning. Alchemy, with its essences, quintessences, and spirits, was Pantheism materialized. God was seen to be in everything, in the abstract as well as the concrete, in numbers as well as realities.

Anticipating what will have hereafter to be considered in detail, I may here remark that it was not the Mohammedan alone who delivered himself up to these mystic delusions; Christendom was prepared for them also. In its opinion, the earth, the air, the sea, were full of invisible forms. With more faith than even by paganism itself was the supernatural power of the images of the gods accepted, only it was imputed to the influence of devils. The lunatic was troubled by a like possession. If a spring discharged its waters with a periodical gushing of carbonic acid gas, it was agitated by an angel; if an unfortunate descended into a pit and was suffocated by the mephitic air, it was by some dÆmon who was secreted; if the miner's torch produced an explosion, it was owing to the wrath of some malignant spirit guarding a treasure, and whose solitude had been disturbed. There was no end to the stories, duly authenticated by the best human testimony, of the occasional appearance of such spirits under visible forms; there was no grotto or cool thicket in which angels and genii had not been seen, no cavern without its dÆmons. Though the names were not yet given, it was well understood that the air had its sylphs, the earth its gnomes, the fire its salamanders, the water its undines; to the day belonged its apparitions, to the night its fairies. The foul air of stagnant places assumed the visible form of dÆmons of abominable aspect; the explosive gases of mines took on the shape of pale-faced, malicious dwarfs, with leathery ears hanging down to their shoulders, and garments of grey cloth. Philosophical conceptions can never be disentangled from social ideas; the thoughts of man will always gather a tincture from the intellectual medium in which he lives.

In Christendom, however, the chief application of these doctrines was to the relics of martyrs and saints. As with the amulets and talismans of Mesopotamia, these were regarded as possessing supernatural powers. They were a sure safeguard against evil spirits, and an unfailing relief in sickness.

A singular force was given to these mystic ideas by the peculiar direction they happened to take. As there are veins of water in the earth, and apertures through which the air can gain access, an analogy was inferred between its structure and that of an animal, leading to an inference of a similarity of functions. From this came the theory of the development of metals in its womb under the influence of the planets, the pregnant earth spontaneously producing gold and silver from baser things after a definite number of lunations. Already, however, in the doctrine of the transmutation of metals, it was perceived that to Nature the lapse of time is nothing—to man it is everything. To Nature, when she is transmuting a worthless into a better metal, what signify a thousand years? To man, half a century embraces the period of his intellectual activity. The aim of the cultivator of the sacred art should be to shorten the natural term; and, since we observe the influence of heat in hastening the ripening of fruits, may we not reasonably expect that duly regulated degrees of fire will answer the purpose? by an exposure of Philosopher's stone. base material in the furnace for a proper season, may we not anticipate the wished for event? The Emperor Caligula, who had formerly tried to make gold from orpiment by the force of fire, was only one of a thousand adepts pursuing a similar scheme. Some trusted to the addition of a material substance in aiding the fire to purge away the dross of the base body submitted to it. From this arose the doctrine of the powder of projection and the philosopher's stone.

This doctrine of the possibility of transmuting things into forms essentially different steadily made its way, leading, in the material direction, to alchemy, the art of making gold and silver out of baser metals, and in theology to transubstantiation. Transmutation and transubstantiation were twin sisters, destined for a world-wide celebrity; one became allied to the science of Mecca, the other to the theology of Rome.

While thus the Arabs joined in the pursuit of alchemy, their medical tendencies led them simultaneously to cultivate another ancient delusion, the discovery of a universal panacea or elixir which could cure all diseases and prolong life for ever. Mystical experimenters for centuries had been ransacking all nature, from the yellow flowers which are sacred to the sun, and gold his emblem and representative on earth, down to the vilest excrements of the human body. As to gold, there had been gathered round that metal many fictitious excellences in addition to its real values; it was believed that in some Potable gold. preparation of it would be found the elixir vitÆ. This is the explanation of the unwearied attempts at making potable gold, for it was universally thought that if that metal could be obtained in a dissolved state, it would constitute the long-sought panacea. Nor did it seem impossible so to increase the power of water, as to impart to it new virtues, and thereby enable it to accomplish the desired solution. Were there not natural waters of very different properties? were there not some that could fortify the memory, others destroy it; some re-enforce the spirits, some impart dulness, and some, which were highly prized, that could secure a return of love? It had been long known that both natural and artificial waters can Chemical waters. permanently affect the health, and that instruments may be made to ascertain their qualities. Zosimus, the Panopolitan, had described in former times the operation of distillation, by which water may be purified; the Arabs called the apparatus for conducting that experiment an alembic. His treatise on the virtues and composition of waters was conveyed under the form of a dream, in which there flit before us fantastically white-haired priests sacrificing before the altar; cauldrons of boiling water, in which there are walking about men a span long; brazen-clad warriors in silence reading leaden books, and sphinxes with wings. In such incomprehensible fictions knowledge was purposely, and ignorance conveniently concealed.

The practical Arabs had not long been engaged in these fascinating but wild pursuits, when results of very great importance began to appear. In a scientific point of view, the discovery of the strong acids laid the true foundation of chemistry; in a political point of view, the invention of gunpowder revolutionized the world.

There were several explosive mixtures. Automatic fire was made from equal parts of sulphur, saltpetre, and sulphide of antimony, finely pulverized and mixed into a paste, with equal parts of juice of the black sycamore and liquid asphaltum, a little quick-lime being added. It was directed to keep the material from the rays of the sun, which would set it on fire.

Of liquid or Greek fire we have not a precise description, since the knowledge of it was kept at Constantinople as a state secret. There is reason, however, to believe that it contained sulphur and nitrate of potash mixed with naphtha. Of gunpowder, Marcus GrÆcus, whose date is probably to be referred to the close of the eighth century, gives the composition explicitly. He directs us to pulverize in a marble mortar one pound of sulphur, two of charcoal, and six of saltpetre. If some of this powder be tightly rammed in a long narrow tube closed at one end, and then set on fire, the tube will fly through the air: this is clearly the rocket. He says that thunder may be imitated by folding some of the powder in a cover and tying it up tightly: Incombustible men. this is the cracker. It thus appears that fireworks preceded fire-arms. To the same author we are indebted for prescriptions for making the skin incombustible, so that we may handle fire without being burnt. These, doubtless, were received as explanations of the legends of the times, which related how miracle-workers had washed their hands in melted copper, and sat at their ease in flaming straw.

Among the Saracen names that might be mentioned as cultivators of alchemy, we may recall El-Rasi, Ebid Durr, Djafar or Geber, ToghragÉ, who wrote an alchemical poem, and Dschildegi, one of whose works bears the significant title of "The Lantern." The definition of alchemy by some of these authors is very striking: the science of the balance, the science of weight, the science of combustion.

To one of these chemists, Djafar, our attention may for a moment be drawn. He lived toward the end of the eighth century, and is honoured by Rhazes, Avicenna, and Kalid, the great Arabic physicians, as their master. His name is memorable in chemistry, since it marks an epoch in that science of equal importance to that of Priestley and Lavoisier. He is the first to describe nitric acid and aqua regia. Before him no stronger acid was known than concentrated vinegar. We cannot conceive of chemistry as not possessing acids. Roger Bacon speaks of him as the magister magistrorum. He has perfectly just notions of the nature of spirits or gases, as we call them; thus he says, "O son of the doctrine, and that oxidation increases weight. when spirits fix themselves in bodies, they lose their form; in their nature they are no longer what they were. When you compel them to be disengaged again, this is what happens: either the spirit alone escapes with the air, and the body remains fixed in the alembic, or the spirit and body escape together at the same time." His doctrine respecting the nature of the metals, though erroneous, was not without a scientific value. A metal he considers to be a compound of sulphur, mercury, and arsenic, and hence he infers that transmutation is possible by varying the proportion of those ingredients. He knows that a metal, when calcined, increases in weight, a discovery of the greatest importance, as eventually brought to bear in the destruction of the doctrine of Phlogiston of Stahl, and which has been imputed to Europeans of a much later time. He describes the operations of distillation, sublimation, filtration, various chemical apparatus, water-baths, sand-baths, cupels of bone-earth, of the use of which he gives a singularly clear description. A chemist reads with interest Djafar's antique method of obtaining nitric He solves the problem of potable gold. acid by distilling in a retort Cyprus vitriol, alum, and saltpetre. He sets forth its corrosive power, and shows how it may be made to dissolve even gold itself, by adding a portion of sal ammoniac. Djafar may thus be considered as having solved the grand alchemical problem of obtaining gold in a potable state. Of course, many trials must have been made on the influence of this solution on the animal system, respecting which such extravagant anticipations had been entertained. The disappointment that ensued was doubtless the reason that the records of these trials have not descended to us.

With Djafar may be mentioned Rhazes, born A.D. 860, physician-in-chief to the great hospital at Bagdad. To him is due the first description of the preparation and properties of sulphuric acid. He obtained it, as the Nordhausen variety is still made, by the distillation of dried green vitriol. To him are also due the first indications of the preparation of absolute alcohol, by distilling spirit of wine from quick-lime. As a curious discovery made by the Saracens may be mentioned the experiment of Achild Bechil, who, by distilling together the extract of urine, clay, lime, and powdered charcoal, obtained an artificial carbuncle, which shone in the dark "like a good moon." This was phosphorus.

And now there arose among Arabian physicians a correctness of thought and breadth of view altogether surprising. It might almost be supposed that the following lines were written by one of our own contemporaries; they are, however, extracted from a chapter of Avicenna on the origin of mountains. This author was born in the tenth century. "Mountains may be due to two different causes. Either they are effects of upheavals of the crust of the earth, such as might occur during a violent earthquake, or they are the effect of water, which, cutting for itself a new route, has denuded the valleys, the strata being of different kinds, some soft, some hard. The winds and waters disintegrate the one, but leave the other intact. Most of the eminences of the earth have had this latter origin. It would require a long period of time for all such changes to be accomplished, during which the mountains themselves might be somewhat diminished in size. But that water has been the main cause of these effects is proved by the existence of fossil remains of aquatic and other animals on many mountains." Avicenna also explains the nature of petrifying or incrusting waters, and mentions Ærolites, out of one of which a sword-blade was made, but he adds that the metal was too brittle to be of any use. A mere catalogue His works indicate the attainment of the times. of some of the works of Avicenna will indicate the condition of Arabian attainment. 1. On the Utility and Advantage of Science; 2. Of Health and Remedies; 3. Canons of Physic; 4. On Astronomical Observations; 5. Mathematical Theorems; 6. On the Arabic Language and its Properties; 7. On the Origin of the Soul and Resurrection of the Body; 8. Demonstration of Collateral Lines on the Sphere; 9. An Abridgment of Euclid; 10. On Finity and Infinity; 11. On Physics and Metaphysics; 12. An EncyclopÆdia of Human Knowledge, in 20 vols., etc., etc. The perusal of such a catalogue is sufficient to excite profound attention when we remember the contemporaneous state of Europe.

The pursuit of the elixir made a well-marked impression upon Arab experimental science, confirming it in its medical application. At the foundation of this application lay the principle that it is possible to relieve the diseases of the human body by purely material means. As the science advanced it gradually shook off its fetichisms, the spiritual receding into insignificance, the material coming into bolder relief. Not, however, without great difficulty was a way forced for the great doctrine that the influence of substances on the constitution of man is altogether of a material kind, and not at all due to any indwelling or animating spirit; that it is of no kind of use to practise incantations over drugs, or to repeat prayers over the mortar in which medicines are being compounded, since the effect will be the same, whether this has been done or not; that there is no kind of efficacy in amulets, no virtue in charms; and that, though saint-relics may serve to excite the imagination of the ignorant, they are altogether beneath the attention of the philosopher.

It was this last sentiment which brought Europe and Africa into intellectual collision. The Saracen and Hebrew physicians had become thoroughly materialized. Throughout Christendom the practice of medicine was altogether supernatural. It was in the hands of ecclesiastics; and saint relics, shrines, and miracle-cures were a source of boundless profit. On a subsequent page I shall have to describe the circumstances of the conflict that ensued between material philosophy on one side, and supernatural jugglery on the other; to show how the Arab system gained the victory, and how, out of that victory, the industrial life of Europe arose. The Byzantine policy inaugurated in Constantinople and Alexandria was, happily for the world, in the end overthrown. To that future page I must postpone the great achievements of the Arabians in the fulness of their Age of Reason. When Europe was hardly more enlightened than Caffraria is now, the Saracens were cultivating and even creating science. Their triumphs in philosophy, mathematics, astronomy, chemistry, medicine, proved to be more glorious, more durable, and therefore more important than their military actions had been.