MODE XVI. SIDEROUS GLUTENITE. 141 



expansion is unequal, being frequently horizontal 

 or even, but sometimes depressed, and in other 

 instances much elevated. Most of the super- 

 imposed strata partake of this inequality, and are 

 its natural consequences. Hence the protuber- 

 ances and depressions, otherwise called moulds, 

 observed in them ; Charp. Saxony, 371. It rests 

 on granite, Ibid. 370, 371."* 



Mr. Jameson informs us that in the Hartz it 

 rests on grauwack, and extends nearly round the 

 whole of the country; nay, through Saxony, Hessia, 

 Bohemia, Silesia, and Franconia. The red sand- 

 stone of the north of England, which is micaceous, 

 and often regularly schistose, so as to form pave- 

 ments, &c. seems also to belong to this formation. 

 As the substance is widely spread and highly re- 

 markable, the barbarous denomination may be 

 exchanged for that of Lasite, in honour of Lasius, 

 the celebrated describer of the Hartz, who has 

 ably illustrated this substance. 



Lasite, of various kinds, from Germany, of 

 which there is a series at the College des Mines, 

 in Paris, where it was shown to me by Daubuisson. 



The same, from the north of England, &c. &c. 



* Kirwan Geol. Essays, 25 6. 



