PHYSIOGRAPHY. Ill 



Calcareous Spar. 



Sp.gr. = 2-7081, milk-white, translucent Calcareous Spar, from 



Scheibenberg in the Erzgebirge. 

 2-7084, milk-white, from Krodendorf in the Erzge- 

 birge. Lustre resinous, or oily. 



This is the most abundant species of the family ; and occurs in forma- 

 tions of nearly every age. A variety from Andreasberg, analyzed by 

 STROMEYER, afforded 



Carbonic acid - 43-5635 



Lime 55 9802 



Oxide of manganese and iron - 0-3563 

 Water 0-1000 



v. Meroxene Carbon-Spar. BREITHAUPT. 

 PonP = l05 11'. 



Cleavage perfect parallel with the primary rhomboid. 

 Hardness (scale of BREITHAUPT) = 4'0. 

 Sp.gr. = 2 6895, a fragment of a crystal, from Tharaud in Dres- 

 den. 



2-6903, cleaved from massive variety, associated with 

 Natrolite, from Mariaberg in Aussig, Bo- 

 hemia. 



Most of the zeolitic druses from Iceland are supposed to ccr^aia thia 

 species. 



vi. Haplotypous Carbon-Spar. BREITHAUPT. 

 P on P == 105 13' 40". 



Cleavage, less perfect than in the foregoing species. 

 Hardness (scale of BREITHAUPT) =4-25. 

 Sp.gr. = 2-7280, > fragments of crystals of a wine-yellow color, 

 2-7294, 5 from the galleries of Verlorne Hoffimng and 

 Neue Hoffnung Gottes at Braunsdorf, 

 west from Freiberg. 



The following Calcareous Spars have a similar specific gravity and a 

 similar hardness : 



2-7259, greyish white, in large compact masses from Alten Au- 

 gust in Freiberg. 



2-7260, translucent, yellowish white, cleavage masses inter- 

 mingled with Vitreous Copper, from Sangerhausen, 

 Thuringia. 



2-7272, smoke-grey, large crystals, from Neu Gliickin Schnee- 

 berg in the Erzgebirge. 



