NOME XVII. GRANITE, WITH GARNETS. 



In a subsequent journey Saussure also dis- 

 covered gneiss, its thin leaves alternating with 

 thicker or thinner leaves of chalcedony. 





HYPONOME I. 



Chalcedony in granite. 



HYPONOME II. 



Nodules of granite in chalcedony. 



Micronome 1. Gneiss, alternating with chalce- 

 dony. 



NOME XVII. GRANITE, WITH SCHORL 

 AND GARNETS. 



A granite, from Bamfshire, Scotland, 1 of red 

 felspar, and bluish fat quartz in large grains, 

 broad plates of micarel of a brilliant yellow, with 

 black schorl in prisms of four lines in diameter. 

 There are also patches of garnets. 



c 2 



