% 5 % A SYSTEM OF 



The Granites are feldom flaty or la^ 

 minated, when their texture is clofe, 

 and the harder particles, as the felt- 

 fpat or rhombic quartz, the quartz, 

 and the fhirl, predominate in it. 

 They admit of a good polifh, for 

 which reafon the Egyptians in former 

 times, and the Italians now, work 

 them into large pieces of ornamental 

 architecture, for which purpofe they 

 are extremely fit, as they do, not de- 

 cay in the air. 



SECT. CCLXXI. 



i. Conglutinated Saxa, Saxa conglutinata. 



A. Of larger or broken pieces of ftones of 

 the fame kinds conglutinated together, 

 Saxum conglutinatum fragmentis lapidum. 

 Breccia. 



i. Of limeftone cemented by lim^, Saxum 

 conftans fragmentis lapidis calcarei* cake 

 conglutinatis. 



a. The calcareous Breccia, Breccia caU 

 carea: The Marmi Brecciati of the 

 Italians. 



When thefe kinds have fine colours, 

 they are polifhed and employed for 

 ornaments in architecture, and other 

 ceconomical uies -, they come from 

 Italy. 



b. The Lumachella of the Italians, or mell 

 marbles. Thefe are a compound of 

 fhells and corals, which are petrified or 

 changed into lime, and conglutinated 

 with a calcareous fubftance. When 

 they have many colours, they are cal- 

 led 



