( n ) 



In the fame places is found another kind 

 of enamel containing a great number of 

 fmall bodies, which 1 will not abfolutely 

 affirm to be garnets, becaufe 1 was not able 

 to analyze them in the humid way ; but 

 their external charadters, together with the 

 proofs furnilhed by the dry way, almoft 

 induce me to conclude them fuch. In all 

 my volcanic refearches I have never met 

 with any fimilar. In general they have a 

 bulbous figure, and are of a blackifh colour, 

 which in fome inclines to a red. Their 

 furface is fmooth and fhining, their recent 

 fradures lamellar, perfectly vitreous, and 

 will cut glafs. The largeft are about three 

 lines and a half in thicknefs, and are opake ; 

 the fmalleft, about the third part of a line, 

 and are femi-tranfparent. They give fparks 

 with fteel, and melt in the furnace into- a 

 black and fcoriaceous enamel. Thefe cha- 

 raders, taken together, certainly give them 

 a great refemblance to garnets : I fhall not 

 therefore hefitate to clafs them with that 

 fpecies of ftone ; as their not being cryftalr 

 lized is of little importance, fmce we know 

 that there are alfo amorphous garnets. 



C 4 While 



