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Updated: June 18, 2025


Undoubtedly the most important of Abulcasis' contemporaries is the famous physician whose Arabic name, Ibn Sina, was transformed into Avicenna.

With the somewhat grudging consent of the clergy, the hygienic skill of the dreaded Arabs was in this city permitted to temper the crass ignorance of medieval Italy, and at Salerno alone were the works of the infidel Avicenna and of the pagans Galen and Hippocrates openly studied.

Jonston says that Avicenna, Rufus, and Gentilis relate instances of young girls who acquired a taste for poisonous animals and substances, who could ingest them with impunity. Colonia Agrippina was supposed to have eaten spiders with impunity. Van Woensel is said to have seen persons who devoured live eels.

Drinking water may be purified by aëration, or by straining, boiling and subsequent sedimentation and removal of the sediment by filtration through fresh and clean sand. For the wealthy, the water may be distilled in an alembic, if such an apparatus is obtainable. Avicenna says that bad water may be corrected by the addition of vinegar.

There were the twenty folio volumes of Albertus Magnus; the works of his disciple, Thomas de Cantopre, of Alchindus, of Averroes, of Avicenna, of Alchabitius, of David de Plaine-Campy, called L'Edelphe, surgeon to Louis XIII and author of the celebrated book The Morbific Hydra Exterminated by the Chemical Hercules.

This may have made the copies of Aristotle's text rare, and gradually led to their disuse. The great authority which names like Alfarabi, Avicenna and Averroes acquired still further served to stamp them as the approved expositors of the Aristotelian doctrine.

Of course the very absence of a Hebrew translation of Aristotle's text proves that even among those who read Arabic the demand for the text of Aristotle was not great, and preference was shown for the works of the interpreters, compendists and commentators, like Alfarabi and Avicenna.

Averroes, in quality of commentator on Aristotle, became his rival in the minds of the mediaeval schoolmen; Avicenna, in quality of commentator on Hippocrates and Galen, was for centuries the text-book of all European physicians; while Albatani and Aboul Wefa, as astronomers, commented on Ptolemy, not however without making a few important additions to his knowledge; for Aboul Wefa discovered a third inequality of the moon's motion, in addition to the two mentioned by Ptolemy, which he did, according to Professor Whewell, in a truly philosophic manner an apparently solitary instance, and one which, in its own day, had no effect; for the fact was forgotten, and rediscovered centuries after by Tycho Brahe.

The fools, whose number, as Solomon certifies, is infinite, shall go to pot like a parcel of mad bedlamites as they are; and all manner of folly shall have an end, that being also numberless, according to Avicenna, maniae infinitae sunt species. Having been driven back and hidden towards the centre during the rigour of the winter, 'tis now to be seen on the surface, and buds out like the trees.

He was familiar with the works both of the Greeks and of the Arabs, and it was largely through his translations that the works of Rhazes and Avicenna became known in the West. One work above all others spread the fame of the school the Regimen Sanitatis, or Flos Medicinae as it is sometimes called, a poem on popular medicine.

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