$o A SYSTEM OF 



SECT. LXXXI. 



g. Solid, and of vifible particles, Solida par- 

 ficulis major thus , Serpentine flone, Lapis 



Serpentinus. 



i. Of fibrous and coherent particles, Lapis 

 ferpentinus fibrofus. 



This is compofed, as it were, of fibres, 

 and might therefore be confounded with 

 the afbeflus, if its fibres did not cohere fo 

 clofely with one another, as not to be fcen 

 v/hen the ftone is cut and polifhed. The 

 fibres themfelves are large, and feem as if 

 they were twifted. 



a. Deep green. 



Is fold for the lapis mphriticus, and 

 is dug at fome unknown place in Ger- 

 many. 



b. Light green, from Skienfhyttan, in 

 Weftmanland ; is ufed by the plate- 

 fmiths, inftead of the French chalk. 



SECT. LXXXII. 



2. Fine grained Serpentine ftone, Serpentinus 

 particulis granulans : the Zoeblitz Serpen- 

 tine. 



Put none of thefe varieties is found in the rock, without being 

 interfperfedwith the un&uous clefts. When they are too many, 

 too clofe to one another, and make the flone unfit for ufe, 

 they are in this cafe called by theSwedifh miners, Skiolige; and 

 of this kind is a great quantity found at Salberg and Swartwik. 

 Molt part of the foap-rock, which is found in Sweden, is 

 llkewife mi^ed with glimmer or mica, and then it is called 

 Telg/teu, that is, Ollarii, Seel, eclxv. 



a. Black* 



