— ■ — —." ■• — ■■■ , •'■ ■"" • 



A 



JOURNAL 



OF 



Natural philosophy, chemistry, 



AND 



THE ARTS. 



AUGUST, 1802 



ARTICLE I. 



On Granite. JBj/ Mr. Robert Jameson. Communicated by 

 the Author. 

 Sheriff Bra:; Leith, July 10, 1802. 



JL HE primitive rocks, of which granite is the otdeft, were Primitive rocks 



formed during that period which Werner terms the chaotic, f ° rme . d dur '" s 



i Au . the chaotic ftate 



when the earth was lull covered to a great height with water, by depofmon 



and before organization had commenced. Their ftructure f™ m an aqueous 



fhews that they have been depofited from a ftate of chemical 



folution *> and the diminishing level of the newer ftrata, that 



* To the idea of all foflil fubftances having been in a ftate of 

 chemical folution in water, it has been objected, that many of them 

 are intirely infoluble in water. To this, without adducing any of 

 the numerous geological proofs, I anfwer, that we know not the 

 original ftate of the different earthy and metallic fubftances ; the 

 artificial means we employ to procure them, may, and certainly has 

 altered many of them from their original ftate.-— J. 



It may alfo be remarked, that many infoluble compounds are de- 

 pofited by the chemical action of bodies which were foluble before 

 they met. Our earths may be fuch compounds. ---N. 



Vol. II.— August, 1802. Q the 



