ILLUSTR.ATIONS OF THE 



« 



der th 



I 



prelTure of the fuperincumb 



fuch a fit 



th 



'nt ocean, 

 bituminous fchiftus 



ght be in contad with the melted bafalt, and 



yet there mi^^ht b 

 tile, 



evaporation of th 



nor 



It d 



not, h 



bullion of the inflammable parts 



ways happen, that the 



bituminous fubftances, or fubftances alterable by 



fire, which are found 



m 



tad: with bafaltes 



are 



operat 



thout any mark of having endured the 



Js in which fuch 



f fi 



Inftanc 



operation is c 



and more will be added 

 note. 



pparent are given above, § 30. 



in the conclufion of th 



r 



248. The fame mineralogift founds another 

 argument for the aqueous formation of whin or 

 trap, on the exiflence of that ftone in the form 

 of veins, included in primeval 



rocks 



I 



tur h 



faxum (trap) in Suecia plurib 



f^epeque in montibus primaevis, anguftas impl 



venas, 



deo 



fubtilis ftrudurae, ut particulse fint 

 impalpabiles, et, dum niger eft, genuinum efficit 

 lapidem Lydium. In hifce montibus, nulla ad- 

 funt ignis fubterranei vefti 



la 



* ' 



The phenomenon here defcribed, namely, a 

 vein of compad whinftone traverfing a primary 

 rock, is, without doubt, as incapable of being 

 explained by the operation of a volcano, as it is 



by 



* Opufcula, ubi fupra. 



