J. C. Brown: A History of Chemistry from the Earliest Times Till the
Present Day. 1913.
F. J. Moore: A History of Chemistry. 1918.
T. E. Thorpe: A History of Chemistry. 2 vols. 1909-10.
Quaestiones Novae in Libellum de Sphaera Johannis de Sacro Bosco, collectae ab Ariele Bicardo. Wittenberg, 1550. (Library of Mr. G. A. Plimpton, New York).
S. Günther: Geschichte der Erdkunde. 1904.
Articles, "Geography" and "Map" in Encyclopaedia Britannica.
L. Gallois: Les géographes allemands de la Renaissance, 1890.
N. Copernici De Revolutionibus orbium caelestium libri vi. (First edition 1543; I use the edition of Basle, 1566).
L. Prowe: Nikolaus Coppernicus. 3 vols. 1883-4. (Standard).
Wohlwill: "Melanchthon und Kopernicus," in Mitteilungen zur Geschichte der Medizin und der Naturwissenschaften, iii, 260, 1904.