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HUTTONIAN THEOPvY. 



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l}ut will be of no ufe to explain the cryllalliza- 

 tion of minerals, (the very objed he has in view), 

 becaufe to cryftaliization, it is not a bare fubli- 

 dence of particles fufpended in a fluid, but it is 

 a paffage from chemical folution to non-folu- 

 tion, or infolubility, that is required. 



If, on the other hand, he means to fay, that the 

 folution actually took place more quickly, and 

 was more immediately followed by precipitation, 

 becaufe the quantity of the menftruum was in- 

 fufficient, this is to affert, that the weaker the 

 caufe, the more inilantaneous will be its effed. 



Of two propofitions, the one of which is nu- 

 gatory, and the other abfurd, it is not material to 

 inquire which the author had in view. 



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Note vii. § 16 



Comprejfion in the mineral regions. 



162. It is worthy of remark, that the efFecls 

 ufcribed to compreffion in the Huttonian Theo- 

 ry, very much refemble thofe which Sir Isaac 

 Newion fuppofes to be produced in the fun and 

 the fixed ftars by that fame caufe. "Are not," 

 fays he, " the fun and fixed liars great earths, 

 vehemently hot, whofe heat is conferved by the 

 reatnefs of the bodies, and the mutual adion 



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and 



