30 POMAIN VII. COMPOSITE. 



NOME XXIV. LIME-STONE, WITH STEA- 

 TITE. 



Tirey, one of the western isles of Scotland, 

 presents a white marble with yellow spots, sup- 

 posed to be steatite. 



In the same interesting isle marble and steatite 

 are reciprocally interveined. 



HYPONOME I. 



Marble, with veins of steatite. 



HYPONOME IJ. 



With spots. 



NOME XXV. LIME-STONE, WITH OLIVINE. 



Olivine, before chiefly observed in lava and 

 basalt, is also found in the micaceous lime-stone 

 of Mount Somma, of which Vesuvius may be 

 regarded as only a portion. Breislak has, on 

 this occasion, given some useful information 

 concerning oli vine and chrysolite*. 



* i. iso. 





