plantarum emendata, Londini 1703. Raii Synopsis methodica stirpium, Ed. 3. And Tournefort's Institutiones rei herbariae. These books with a few observations of my own, as I walked in the gardens, the fields, and on the plains, furnished me with sufficient knowledge of this kind for the present. The vast folio's on this subject are not for beginners. Chemistry was the next thing my director bid me look into, and to this purpose I perused Boerhaave's Elementa chemiae: and Hoffman's Observationes physico-chemiae: These afford as much chemistry as a young physician need set out with: but as books alone give but an imperfect conception, I performed most of the common operations in the portable furnace of Becher. The materia medica in the next place had my attention, that is, those animal, vegetable, and fossil substances, which are used to prevent, cure, or palliate diseases. And in order to know the names of all the drugs, their history, the adulterations they are subject to, their virtues, their dose, their manner of using them, and the cautions which they require, — to get a sufficient knowledge of this kind, I looked into Geoffrey's materia medica, and made a collection of the materia at the same time, that I might conceive and remember what I read. Pharmacy, or the art of preparing and compounding medicines, was the next thing I endeavoured to be a master of. And that I might know how to exalt their virtues, to obviate their ill qualities, and to make them less nauseous, I read to this purpose, Quincy's pharmaceutical lectures and dispensatory: and took care to be well versed in all the pharmacopoeia's, those of London, Edinburgh, Paris, Boerhaave, Bate, and Fuller. And I read very carefully Gaubin's methodus praescribendi. This gave me the materials, and taught me the form of prescribing. Anatomy I studied next, that is, the art of dividing the several parts of a body, so as to know their size, figure, situation, connexions, and make. I began with Drake and Keil, and then read over Winslow. I had likewise open before me at the same time, at my entrance upon this study, a good set of plates, the tables of Eustachius and Cooper, and turned them carefully over as I read. The doctor then showed me how to dissect, but chiefly by the direction of a book called the Culter Anatomicus of Michel Lyserus, ou methode courte, facile, & claire de dissequer les