146 ANALYSIS OP 



According to the preceding results, we have 



Per 100 parts. 



B- Lime, 51. 30 



D. Phosphoric Acid,. 40. 84 



C. Phosphate of Lime, 05- 80 



97 94 

 100 00 



002.06 Loss. 



If the undecomposed phosphate of lime be omit- 

 ted, the composition of this mineral will be 



Per 100 parts. 

 Lime, 55. 67 



Phosphoric Acid, 44. 3S 



This mineral was discovered by Doctor R. Alison, on Alison's 

 Farm> London-Grove Township, imbedded in mica slate. 



On two veins of Pyroxene or Jlugiie in Granite 



By Lardner Vancjxem. 



" The substratum of the soil of Columbia (S. C.) 

 and its vicinity, consists of Granite, the kind which 

 is commonly considered to be primeval. This rock 

 commences at Richmond in Virginia, and is visible 

 to this place in most of the rivers and streams which 

 cross the main road between these two towns. It is 

 the only primitive rock known to exist east of this 

 road. Its usual colour is grey, sometimes it presents 

 Tery beautiful red varieties as on the Saluda river. 



