TAB. CCXXXIX. 
BARYTES carbonata. 
Globular Carbonate of Barytes. 
Class 2. Earths. Order 1. Homogeneous. 
Gen.6. Barytes. | Spec. 2. Carbonate. 
Div. 2. Imitative. 
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SuLPHATE OF BARYTES has been represented in tab. 96 of 
a globular form, and I believe it was thought almost a di- 
stinguishing character of the substance. Since Carbonate 
of Barytes has occurred in globular forms also, it becomes 
necessary to show the distinction, as we do not know that 
it has been before observed by any author. According to 
a specimen I have received from Dufton in Westmorland, 
which is rather a wedge-shaped fragment—see the back 
Sigure—they may be tolerably large, as this fragment, which 
seems to have been part of a ball, being near six inches long, 
promises some of a larger formation, and I have seen some 
balls pretty perfect, from one to three or four inches in 
diameter. An opaque roughness generally occurs on these 
nodules, which sometimes show a tendency to crystallize 
in six-sided prisms, either with or without six-sided pyra- 
mids*, or only with part of a six-sided pyramid, the end 
being truncated—see the top large specimen and part of the 
smaller, I <.o not show the most distinct, as in those, they 
* Such as tal. 109, being, however, very rare. 
