Pharmacopœia officinalis & extemporanea [electronic resource] : or, a compleat English dispensatory, in four parts. Containing I. The Theory of Pharmacy, and the several Processes therein. II. A Description of the Officinal Simples, with their Virtues and Preparations, Galenical and Chymical. III. The Officinal Compositions, according to the last Alterations of the College; together with some others of Uncommon Efficacy, taken from the most Celebrated Authors. IV. Extemporaneous Prescriptions, distributed into Classes suitable to their Intentions in Cure. By John Quincy, M.D. To which is now added, An Account of the Common Adulterations both of Simples and Compounds, with some Marks to detect them by.