Johann Georg MacasiusJohann Georg Macasius was a physician from the Holy Roman Empire. He was born in Eger, Bohemia.EducationHe received the Medicinae Doctorate from the University of Jena in 1638 under Johannes Musaeus with a thesis entitled De natura et causis externis. In 1640, he received a second Medicinae Doctorate from the University of Jena under Balthasar Widmarcter with a thesis entitled ''Disputatio de inflammatione.''Books by Macasius Johann Georg Macasius and Johann Mathias Nester, Promptuarium materiae medicae, sive Apparatus ad praxim medicam libris duobus adornatus.