William of MarseilleAlso known as Guillelmus Massiliensis was a thirteenth-century English academic, teaching in France. He is known for the medical-astrological treatise De urina non visa.On Unseen Urine. Dated to 1219.. The method is to use a horoscope to deduce properties of the urine of a patient for diagnosis, when the urine itself cannot be obtained.The medieval doctor would be expected to make a diagnosis from the patient's urine. There is an obvious problem if the patient's urine can not be obtained. William solves this tricky question by casting the patient's horoscope and working out what the urine should have looked like. This book was still used at the University of Bologna in 1405..
Works From Liste lateinischer Autoren und anonymer Werke des 13. Jahrhunderts (ca. 1170-1320) Astrologia De urina non visa (1219) Tabula de stellis fixis Tractatus de meteoris (c. 1230)
References
Laurence Moulinier-Brogi (2012). « William the Englishman’s De urina non visa and its fortune », London—Read at the conference "Medical Prognosis in the Middle Ages"
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