C "5 ] 



Silex 13. Magnefia 13. Iron 5. Lime 2* 

 Saussure, fun, 



3. Mica, lamellated ftruQure, the laminae fome- 

 times of confiderable fize, femi-tranfparent, and 

 the Muscovy glass in thefe laminae is quite iranfpa- 

 renty and is ufed for windows and lanterns ; flex- 

 ible and elaftic ; is found of various colours, from 

 filver white to blackifh. Anal. Argill 28. Si- 

 lex 38- Magneiia 20. Oxyde of iron o. 

 Kirwan. 



m. Micarelle, found in granite ; of a browniffo 

 black colour ; texture foliated. Anal. Argill 

 63. Silex 29. Oxyde of iron 7. Klapr. AnaL 

 Argill 63. Silex 29. Oxyde of iron 7. JKinvan. 



n. Hornblende^ Bafaltic hornblende, Common 

 hornblende, Schiftofe hornblende, found of various 

 degrees of hardnefs, but never fo hard as to {hike 

 fire with fteel ; blackifh or deep green colour ; 

 cryftallized in fix-lided prifms, the ends acumi- 

 nated by three faces; and alfo terminating vari- 

 oufly ; cryflals internally mining; the texture ex- 

 hibits diverging radiations. Anal Argill 27. 

 Silex 58. Lime 4. Magneiia 1. Lime g. Berg- 

 man. Conf. Kirwan. 



o. Resplendent Hornblende, Labrador horn- 

 blende, Schiller fpar, colour greyifh black, fome- 

 times with a made of copper red, refembling La- 

 brador ftone; texture lamellated; the lamellae 

 curved. Anal. Argill 17. Silex 42. Magnefia 

 it. Iron 28. Gmelin. 



Q 2 p. Basalt 5 



