William of Marseille

William of Marseille[1] was a thirteenth-century English academic, teaching in France. He is known for the medical-astrological treatise De urina non visa.[2] The method is to apply a horoscope to deduce properties of the urine of a patient, when that cannot be obtained; and then to proceed to diagnosis.[3] This book was still used at the University of Bologna in 1405. .

Works

From this PDF

Astrologia
De urina non visa (1219)
Tabula de stellis fixis
Tractatus de meteoris (c. 1230)

References

Lynn Thorndike (1923). A History of Magic and Experimental Science During the First Thirteen Centuries of Our Era. 2. New York: Columbia University Press. ISBN 0-231-08795-0.
Guillaume l'Anglais; Laurence Moulinier-Brogi (2011). Guillaume l’Anglais, le frondeur de l’uroscopie médiévale (XIIIe siècle) (in French and Latin). Geneva: Droz.
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"

Notes

Also known as Guillelmus Massiliensis. He is called Guillaume l'Anglais (William of England, William the Englishman, "Guilielmus Anglicus", Guillelmus Anglicus), but these names may refer to numerous people of the period.
On Unseen Urine. Dated to 1219..
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.

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[1] Also known as Guillelmus Massiliensis. He is called Guillaume l'Anglais (William of England, William the Englishman, "Guilielmus Anglicus", Guillelmus Anglicus), but these names may refer to numerous people of the period.

[2] On Unseen Urine. Dated to 1219..

[3] 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.