VOL. XXV.] ' ^PHILOSOPHICAL TRANSACTIONS. 30/ 



Materiam Medicaui, of which an account was given in N° 204.* After which 

 he thought a supplement necessary, to render it more useful toother countries: 

 and because it has extended its progress to the neighbourhood of Greece, he 

 concluded, that it would not be improper to add, out of Dioscorides and the 

 foreign dispensatories, all those things which he had omitted publishing. 



Our author had made a considerable progress in this design when he received 

 advice that M. Tournefort was, by the French King's order, gone into Greece 

 and the adjacent islands, in search of plants, especially those of Dioscorides ; 

 this induced him to stop the prosecution of his work for some years, in hopes 

 that botanist would, on his return, gratify the curious with his discoveries of 

 the true and genuine plants of the ancient Grecians, which had perplexed the 

 herbalists of these late ages. 



In this supplement our author took care to set the Materia Medica of Dios- 

 corides in a clear light; and for that end consulted all the authors that he 

 could meet on that subject, keeping as close as he could to his text, in which 

 he chiefly adhered to the translation and commentary of Matthiolus. And be- 

 cause, in this performance, he travelled in an untrodden path, knowing of no 

 precedent in any language, he therefore consulted both the dead and living, i.e. 

 not only books, but many persons of ingenuity and learning. The nature of 

 the work requiring the virtues of each simple to be annexed, and the design of 

 the book requiring brevity, he chose to transcribe them from authors, which 

 had already contracted to his hand; but at the same time, to avoid the imputa- 

 tion of plagiarism, he at the end of every transcription inserted the name of the 

 respective authors. Nor did he think it any discredit to him, that he had the 

 assistance of others, but rather a glory, and therefore throughout the work he 

 acknowledged the persons he had advice from. 



De Monslris, qu-asi Monstris et Monstrosis ; item de Serpentibus, &c. Philip- 

 pensibus, ex M.S. R.P. Geo. Jos. Camelli. Communicavit D. Jac. Petiver, 

 Pharmacop. Lond. et S.R.S. N° 307, p. 2266. 



jt4n /Account of an Experiment made before the Royal Society at Gresham Col- 

 lege, showing the Production of a considerable LAght on a slight Attrition of 

 the Hands on a Glass Globe exhausted of its Air : with other remarkable cir- 

 cumstances. By Mr. Fra. Hauksbee, F. R. S. N° 30,7, p. 2277. 



The experiments already made on this head, as the attrition of amber on 

 woollen, glass on glass, and with several other bodies in vacuo, which though 



* Vol. Ui. p. 588 of these Abridgments. 

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