MINERALOGY, 91 



a. Black. 



b. Deep green- 



c. Light green. 



d. Red. 



e. Bluifh grey. 



/. White. Thefe colours are alt mixed to- 

 gether in the Terpentine ftone, from Zoe- 

 blitz, but the green is the moil predomi- 

 nant colour. 



SECT, LXXXIII, 



3. Mixed with iron, Terra porcellanea marte 

 mixta.- This is 

 A. Diffufible in water. 



a. Red, la terre rouge, from Montmartre, 

 and China. 



Some of the bricks which are imported 

 from fome certain places in Germany, 

 feem to be made of this kind. 

 fi. Indurated. 



1. Martial foap earth, Crcta Brianzonica 

 martialis. 



a, Red, from Jarfberg, in Norway; 

 It is likewife mixed with fome cal- 

 careous matter. 



2. Martial foap rock, Steatites martialis. 



a. Black, from Sundborn, in Dalarne, 

 Torrakeberget, in Wermeland, Offer- 

 dal, in Jemtland. 



b. Red, from Siljejord in Telemarken, 

 in Norway *, 



* Since the iron renders the fo called refra&ory clays, as 

 well as other clays, eafier fufible than they really are by 

 themfelves ; it might be queried, how it can be determined, 

 pf what frecies of argillaceous matter thefe confift ? To this 



it 



