TAB. IV. 



CALX carbonata, vaf. inversus. 

 Crystallized Carbonate of Lime, inverted. 



Class 2. Earth. Order 1. Homogeneous. 

 Gen. 1. Lime. Spec. 2. (Carbonate of Lime. 

 D'w. 1. Crystallized. 



Syn. Chaux carbonatee inverse. E 1 J E. Hauy> v. 2. 

 183. f 



The upper figure is a curious specimen of crystallized car- 

 bonate of lime, with the faces of the rhomb in the inverse 

 order to the laminae of the nucleus, and their angles so near 

 to those of the primitive, over which it is formed, as to 

 look like the same, differing only in one degree : ioa° 30', 

 77° 3°'- This is from Pwll-y-cochan, near Conway, Car- 

 narvonshire, out of a lead and blend mine. It is stained 

 probably with oxid of iron. The edges are more trans- 

 parent and shining than the other parts. The rest of the 

 mass or matrix is crystallized in primitive rhombs, mingled so 

 confusedly that it is not readily perceived without breaking j 

 when they are found very regular, 



