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The Sistine Madonna.1513-14.Sanzio RAFFAELLO.Gemäldegalerie, Dresden. Six fingers mean clairvoyance.
@ChemHeritage @historical_iris Uroscopy according Persian physician.Al-Razi, "Recueil des Traités de médecine",1250
Caricature of a quack treating a patient with Perkins Patent Metallic Tractors by James Gillray, 1801.