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the fact that eight of the one hundred and eighty…two medical books printed before 1481 were from his pen。 He seems to have taught medicine in Paris； Bologna and Padua。 He was a devoted astrologer； had a reputation among the people as a magician and； like his contemporary； Arnold of Villanova； came into conflict with the Church and appears to have been several times before the Inquisition； indeed it is said that he escaped the stake only by a timely death。 He was a prolific commentator on Aristotle； and his exposition of the 〃problems〃 had a great vogue。 The early editions of his texts are among the most superb works ever printed。 He outlived his reputation as a magician； and more than a century after his death Frederick； Duke of Urbino； caused his effigies to be set up over the gate of the palace at Padua with this inscription：
PETRUS APONUS PATAVINUS PHILOSOPHIAE MEDICINAEQUE SCIENTISSIMUS； OB IDQUE； CONCILIATORIS NOMEN ADEPTUS； ASTROLOGIAE VERO ADEO PERITUS； UT IN MAGIAE SUSPICIONEM INCIDERIT； FALSOQUE DE HAERESI POSTULATUS； ABSOLUTUS FUERIT。＇21＇
＇21＇ Naude： History of Magick； London； 1657； p。 182； or the original： Apologie pour les grands hommes soupconnez de magic； e。g。； ed。 Amst。； 1719； p。 275。
It is said that Abano caused to be painted the astronomical figures in the great hall of the palace at Padua。
One characteristic of mediaeval medicine is its union with theology； which is not remarkable； as the learning of the time was chiefly in the hands of the clergy。 One of the most popular works； the 〃Thesaurus Pauperum；〃 was written by Petrus Hispanus； afterwards Pope John XXI。 We may judge of the pontifical practice from the page here reproduced； which probably includes； under the term 〃iliac passion；〃 all varieties of appendicitis。
For our purpose two beacons illuminate the spirit of the thirteenth century in its outlook on man and nature。 Better than Abelard or St。 Thomas Aquinas； and much better than any physicians； Albertus Magnus and Roger Bacon represent the men who were awake to greet the rising of the sun of science。 What a contrast in their lives and in their works！ The great Dominican's long life was an uninterrupted triumph of fruitful accomplishmentthe titanic task he set himself was not only completed but was appreciated to the full by his own generation a life not only of study and teaching； but of practical piety。 As head of the order in Germany and Bishop of Regensburg； he had wide ecclesiastical influence； and in death he left a memory equalled only by one or two of his century； and excelled only by his great pupil； Thomas Aquinas。 There are many Alberts in history the Good； the Just； the Faithfulbut there is only one we call 〃Magnus〃 and he richly deserved the name。 What is his record？ Why do we hold his name in reverence today？
Albertus Magnus was an encyclopaedic student and author； who took all knowledge for his province。 His great work and his great ambition was to interpret Aristotle to his generation。 Before his day； the Stagirite was known only in part； but he put within the reach of his contemporaries the whole science of Aristotle； and imbibed no small part of his spirit。 He recognized the importance of the study of nature； even of testing it by way of experiment； and in the long years that had elapsed since Theophrastus no one else； except Dioscorides； had made so thorough a study of botany。 His paraphrases of the natural history books of Aristotle were immensely popular； and served as a basis for all subsequent studies。 Some of his medical works had an extraordinary vogue； particularly the 〃De Secretis Mulierum〃 and the 〃De Virtutibus Herbarum；〃 but there is some doubt as to the authorship of the first named； although Jammy and Borgnet include it in the collected editions of his works。 So fabulous was his learning that he was suspected of magic and comes in Naude's list of the wise men who have unjustly been reputed magicians。 Ferguson tells＇22＇ that 〃there is in actual circulation at the present time a chapbook。 。 。 containing charms； receipts； sympathetical and magicalcures for man and animals； 。 。 。 which passes under the name of Albertus。〃 But perhaps the greatest claim of Albertus to immortality is that he was the teacher and inspirer of Thomas Aquinas； the man who undertook the colossal task of fusing Aristotelian philosophy with Christian theology； and with such success that the 〃angelic doctor〃 remains today the supreme human authority of the Roman Catholic Church。
＇22＇ Bibliotheca Chemica； 1906； Vol。 I； p。 15。
A man of much greater interest to us from the medical point of view is Roger Bacon and for two reasons。 More than any other mediaeval mind he saw the need of the study of nature by a new method。 The man who could write such a sentence as this： 〃Experimental science has three great prerogatives over other sciences； it verifies conclusions by direct experiment； it discovers truth which they never otherwise would reach； it investigates the course of nature and opens to us a knowledge of the past and of the future；〃 is mentally of our day and generation。 Bacon was born out of due time； and his contemporaries had little sympathy with his philosophy； and still less with his mechanical schemes and inventions。 From the days of the Greeks； no one had had so keen an appreciation of what experiment meant in the development of human knowledge； and he was obsessed with the idea； so commonplace to us； that knowledge should have its utility and its practical bearing。 〃His chief merit is that he was one of the first to point the way to original researchas opposed to the acceptance of an authoritythough he himself still lacked the means of pursuing this path consistently。 His inability to satisfy this impulse led to a sort of longing； which is expressed in the numerous passages in his works where he anticipates man's greater mastery over nature。〃＇23＇
＇23＇ Dannemann： Die Naturwissenschaften in ihrer Entwicklung und in ibrem Zusammenhange；Leipzig； 1910； Vol。 I； pp。 278…279。
Bacon wrote a number of medical treatises； most of which remain in manuscript。 His treatise on the 〃Cure of Old Age and the Preservation of Youth〃 was printed in English in 1683。＇24＇ His authorities were largely Arabian。 One of his manuscripts is 〃On the Bad Practices of Physicians。〃 On June 10； 1914； the eve of his birth； the septencentenary of Roger Bacon will be celebrated by Oxford； the university of which he is the most distinguished ornament。 His unpublished MSS。 in the Bodleian will be issued by the Clarendon Press ＇1915…1920＇； and it is hoped that his unpublished medical writings will be included。
＇24＇ It may be interesting to note the three causes to which he attributes old age： 〃As the World waxeth old； Men grow old with it： not by reason of the Age of the World； but because of the great Increase of living Creatures； which infect the very Air； that every way encompasseth us； and Through our Negligence in ordering our Lives； and That great Ignorance of the Properties which are in things conducing to Health； which might help a disordered way of Living； and might supply the defect of due Government。〃
What would have been its fate if the mind of Europe had been ready f