82 September 1748. 



burnt to charcoal, and hog's lard, upon the 

 fwelled parts. Some afferted that they had 

 really tried this remedy. In fome places 

 this tree is rooted out on purpofe, that 

 its poifon may not afFedt the workmen. 



1 RECEIVED to day, feveral curiolities 

 belonging to the mineral kingdom, which 

 were colledted in the country. The fol- 

 lowing were thofe which were moft worth 

 attention. The firft was a white, and quite 

 tranfparent cryftal.* Many of this kind 

 are found in Penjyhaniay in feveral kinds of 

 ftone, efpecially in a pale-grey limeftone. 

 The pieces are of the thicknefs and length 

 of the little linger, and commonly as tran- 

 fparent as poffible. But I have likewife 

 got cryflals here, of the length of a foot, 

 and of the thicknefs of a middle-fized man's 

 leg. They were not fo tranfparent as the 

 former. 



. The cubic Pyrites of Bijhop Browallius,-^ 

 was of a very regular texture. But its 

 cubes were different in fize, for in fome of 



the 



* Nifrutn Cryft alius montana, Linn. Syft. nat. 3. p. 84. 

 Cryftallus hexagona pellucida non Colorata. Wallerius's Minera- 

 logy, p. 100. Cryjiallus montana^ colourlefs cryftal. For- 

 Jler's Introd. to Mineralogy, p. 13. 



f Pyrites cryftallinus, Linn. Syft. nat. 3. p. II 3. Marcha- 

 fit a hexaedricct tejfelares. Wallerius's Mineralogy, p. 2H. 

 Marcafita, vel cry/ialli fjritacei, M^rQaHtQS, Forfier's IntiOd, 

 to Mineralogy, p. 39. 



