MODE IX. MAGNESIAN LIMESTONE. 



limestone. The Apollo of Belvidere, and some 

 other beautiful statues, are said to be formed of 

 Dolomite. 



Dolomite forms arrects, or uprights, extend- 

 ing from the base to the summit of the Alps of 

 Tyrol ; whence it has become a proverb in the 

 country, that no mountain exists without a hat 

 of limestone*. It is sometimes in large masses, 

 sometimes in thin layers, alternating with foli- 

 aceous mica. Saussure, 1929, observes, that 

 most of the primitive limestones of St. Gothard 

 are Dolomites ; and they often contain the para- 

 sitic substance called tremolite. 



STRUCTURE I. MAGNESIAN LIMESTONE. 



From the North of England, and various other 

 countries. 



STRUCTURE II. DOLOMITE. 



Aspect 1. Entire. From the ruins of Rome. 

 From the Alps of Tyrol. 



Aspect 2. Mingled. From St. Gothard, with 

 tremolite. 

 The same, elastic, with foliaceous mica. 



* Patrin, ii. 309, 



