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The garnets of the fecond fpecics are 

 contained in a lava which has for its bafe a 

 foft horn-ftone. They are larger than the 

 former, and entirely opake. They are white 

 as fnow, and more brilliant in their fractures 

 than the preceding. Many of them are of a 

 round figure, and manifeftly (hew a cryftal- 

 lization in various facets ; which, however, 

 it is impoffible to number, as they break in 

 pieces if we attempt to extrad: them from 

 the lava. Many others of them are of very 

 irregular forms. 



Several of this fecond fpecies of garnets 

 inclofe within them fmall prifmatic fhoerls, 

 of the colour and luftre of afphaltum, which 

 probably pre-exifled completely formed, 

 and were taken into the moifture from 

 which the garnet derived its origin. 



Thefe garnets are, llkewife, infufible in 

 the furnace, though the lava is converted 

 into a porous fcoria. 



The third kind is ftrongly infixed In a 



heavy 



