506.1 Lancelot COLSON. Philosophia Maturata: An Exact Piece of Philosophy, Containing The Practick and Operative part thereof in gaining the Philosopher's Stone; With the wayes how to make the Mineral Stone, and the Calcination of Mettals. Whereunto is added, A Work Compiled by St. Dunstan, concerning the Philosopher's Stone, And the experiments of Rumelius and Preparations of Angelo Sala, all most famous Chymists in their time. Published by Lancelot Colson, Dr. in Phys. and Chym. 12° London, Printed for G. Sawbridge 1668 Ferguson Young Nat Union Cat Wisconsin