REFERENCES.--Biography of Paracelsus, in Larousse, “Dict Univ.,” Vol. XII. pp. 171–172, in F. Hartmann, 1887, and in the ninth ed. of the “Encycl. Brit.,” Vol. XVIII. pp. 234–236; Van Swinden, “Recueil,” etc., La Haye, 1784, Vol. I. pp. 356–358; Gilbert, “De Magnete,” Book I. chaps. i. and xiv., also Book II. chap. xxv.; “Journal des Savants” for November 1849; Walton and Cotton, “Complete Angler,” New York and London, 1847, pp. 212–213, for notes regarding Paracelsus, Robert Fludd, Jacob Behmen and the Rosicrucians; “Dictionnaire Historique de la Médecine,” N. F. Eloy, Mons, 1778, Vol. III. pp. 461–471; “History and Heroes of the Art of Medicine,” J. Rutherfurd Russell, London, 1861, pp. 157–175; “Histoire Philosophique de la Médecine,” Etienne Tourtelle, Paris, An. XII. (1804) Vol. II. pp. 326–346; “History of Magic,” Joseph Ennemoser, London, 1854, Vol. II. pp. 229–241. At p. 55 of the first supplement to “Select. Bibliog. of Chemistry,” by H. C. Bolton, Washington, 1899, mention is made of the Paracelsus Library belonging to the late E. Schuberth of Frankfort-on-the-Main ... as containing 194 titles of works on Paracelsus and 548 titles of works relating to Paracelsus and his doctrines; the section on Alchemy embracing as many as 351 titles. =A.D. 1492.=--Columbus, Colombo, Colon (Christopher), the discoverer of America., is the first to determine astronomically the position of a _line of no magnetic variation_ (on which the needle points to the true north) the merit of which discovery has, by Livio Sanuto, been erroneously attributed to Sebastian Cabot. (Livio Sanuto, “Geographia distincta in XII libri ...” wherein the whole of Book I is given to reported observations of the compass and to accounts of different navigators.)