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CONTENTS. 



XV 



2. Granite of Portfoy. 



Page 320 



Defcrlption of this granite 



87. Pierre graphiquc; 



of M. Patrin not perfeftly the fame with that of Port- 

 foy, § 288. Quartz cryllallized in the pierre gra- 

 phique, § 289. Inftances of quartz cryllallized in 

 other granites. 

 §2^0. Whether this cryllallization is only found in 

 fecondary granites, § 291. 



In that of St Agnes in Cornwall, 



3. Stratification of Granite. 



p. 326 



<^^ 



§ ^9^ 

 at Ch 



Water 



Remarkable examples of llratifiecl granite 

 rley ^poreft, Leiceflerlhire, and at FaiTnet 

 in Berwicklhire, 



294 



Stratification of 



Mont Blanc, and 



main 



§ 





295, 266. Seems neverthelefs 

 In the granite mountains of Arran 

 Explanation of the flratification of 



h 



§ 



If granitic veins wei'e 



lound proceeding from real granitic flrata, they could 

 not be explained on the principles here laid down. 



§ 301 



No fi.ch veins have been difcovered, § 



Anfwer to an objedion ma 

 granitic mountains, § 303. 



Of the proportion 



of the earth's furface occupied by granite 



ks 



^ N 



tent of grani 

 Dr Hutton, § 



6 



3io» 



in Scotland erroneouflv eflimated 



Arnount 



JMr Kirwan's opinion, §313 



f 



Obfervations on 



Note 



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