£ 45 ] 



green, grey, red, brown, black, gold colored, 

 iilver mica, &c. 



c. Asbestos and amianthus, are bodies very 

 refractory in the fire. The former is the moft 

 flexible, and may be wove with the addition of 

 hemp or lint into cloth, capable of enduring 

 violent heat ; the lint is indeed confumed, but 

 the afbeftos remains unchanged. Formerly dead 

 bodies were wrapped in this kind of cloth, whea 

 they were thrown upon funeral piles, to pre- 

 vent the allies of the deceaied from mixing with 

 the common allies. 



E. Stone, a concreted granulated fubftance; 

 breaking freely in any direction j effects with 

 fire and acids various. 



a. Of thefe there are divers kinds, as the quart- 

 zofe fand ftone, free ftone, Portland Itone, 

 Purbeck ftone, Ketton ftone, purple ftone, Bath 

 ftone, &c. 



b. Granite, vitrifiable, compofed chiefly of 

 quartz, mica, and felt fpat (<?), ibmetimes of 

 garnet, bafaltes and indurated fteatkes fo hard 

 as to ftrike fire with fteel, and to receive a 

 polifh. 



c. Conglutinated (tones, compofed of pebbles 

 of various kinds, irregularly difpofed, and ce- 

 mented by different fubftances, as pudding 

 ftone, mill ftone, &c. 



c. Porphyry, has a fine compact uniform tex- 

 ture like Hint, in which detached pieces or fepa- 

 rate concretions of quartz are imbedded in all 

 directions ; ftnkes fire with fteel, is fufible, but 

 does not effervefce with acids, as ophites, fer- 

 pentine ftone, and porphyries of different colors, 



(e) Called by Da Cofta Rhombic Quartz. 



i Slate 



