CHAPTER V. Connection Between Alchemy and Astronomy—Scot’s Interest in the

Connection between alchemy and astronomy—Scot’s interest in the latter science—Toledo a favourable place for such study—Progress made by the Moors in astronomy—Scot translates Alpetrongi—Relation of this author to those who had preceded him: to Albategni; to Al Khowaresmi and to Alfargan—The fresh contributions made by Alpetrongi to a theory of the heavenly motions—His solution of the problems of recession and solstitial change—The date of Scot’s version of the Sphere, and its possible coincidence with that of the great astronomical congress at Toledo, 96