History of the German People at the Close of the Middle Ages . By Johannes Janssen Translated from the German by M A Mitchell and A M Christie. Vol I, p. 3.
2
Nikolaus Kopernicus, Der Altmeister der neueren Astronomie, Ein Lebens und Kultur Bild . Von Adolf Muller, S.J.
3
Professor of Astronomy and Physics at the Pontifical Leonine College of Anagni
5
For the refutation of this calumny with regard to John XXII, see "Pope John XXII and the supposed Bull forbidding Chemistry," by James J. Walsh, Ph. D., LL. D., in the Medical Library and Historical Journal, October, 1905.
