28 DOMAIN VII. COMPOSITE. 



original substance be not. He adds, that all 

 these properties characterise some kinds of 

 hornblende, the only singularity of this being 

 its blue and brilliant colour*. 



NOME XXI. CLAY, SPATHOSE IRON. 



A composite rock of clay, spathose iron, and 

 another spar f. 



NOME XXII. SERPENTINE, WITH LIME- 

 STONE. 



Some of the most singular compounds with 

 lime-stone occur in the Pyrenees, where that 

 substance forms the chief summits. The inter- 

 mixture of lime-stone, or of calcareous spar, with 

 serpentine, is there not uncommon. 



Some of the noblest marbles, as the verd- 

 antique, and that lately discovered in Anglesea, 

 consist of serpentine mingled with carbonate of 

 lime; but the magnesia is so preponderant, and 

 its nature so predominant and characteristic, 

 that such are arranged in the Talcous Domain ; 

 not to mention that the union is too intimate to 



* 2274. f 1446. 



