I 



HUTTONIAN THEORY 



33 



„^tl! 



5> 



ol 



^dftli 



ta alfo contain pyrites in great abundance, a 

 fubflance that is perhaps, more than any other. 



al 



yi 



tb 



decided progeny of fire 



Th 



pound 



tot 



mine 



'ACOi 



■ ranj 

 :ftio;2 



mine 



il 



thol 



rme 



!3 



:OpE 



erfe 

 ices 

 e c! 



of metal and fulphur, which is found in mineral 

 bodies of every kind, I believe, without any ex- 

 ception, is deflroyed by the contad of moifture, 

 and refolved into a vitriolic fait. At the fame 



r 



time it is found in the ftrata, not traverii 



ing 



them in veins, which may be fuppofed of mor 



recent formation th 



th 



ft 



themfelve 



but exifting in the heart of the moll folid rocks 

 g2 often nicely cryftallized, and completely inclo- 



otlie fed 



on all fides, without the moft 



uity 



The pyrites 



ft have b 



prefent 



therefore, when the ftrata were confolidated. and 



cii it is inconceivable, if thei 



fol 



was 



ratd brought about in the wet way, that a fubftance 

 mnei ftiould be fo generally found in them, the very 



ftence of which is 



dity 



patibl 



th hum 



This argument for the 



(C^ti the ftrata is applicable to th 



gneous orig 

 'cn all, but i 



f 



ally to thofe of coal, as abounding with pyri 

 s more than any other. 



29. The difficulty that here naturally prefent 



itfelf, viz. how vegetable 

 fuppofed to have been, could be 



6lion of intenfe heat 



fuch as coal 

 expofed to t 



thout being deprived 



f its inflammable part, is obviated by the p 

 iple formerly explained concerning the eft'edis 



C 



of 



I 





