52 DOMAIN VIII. DIAMICTONIC. 



NOME XXI. STEATITE, WITH ARGIL. 



[STAHLITE, from Stahl, 1700.] 



Dr. Babington informs us, that this substance 

 is harder, and less unctuous, than common 

 steatite, and has an earthy smell when breathed 

 on. That of Cornwall is of a dark olive-green 

 colour, and slaty texture*. 



NOME XXII. OLLITE, WITH SILEX. 



[POTTALITE, from Potty of Berlin, who first 

 analysed stones and earths, 1730.] 



This kind is described by Mr. Kirwanf. The 

 quartz is in many parts visible in the veins, and 

 the lustre approaches that of graphite. 



* Cat. St. Aubyn, p. 118. 

 t i- 376. 



