4 



\ 



K: 



HUTTONIAN THEORY. 257 



parts of the vein ; as fome difference of charac- 

 [ e|, ter cannot fail to be the confequence of diifer- 





tk 



t 



formation; If no fuch difference is obfi „ 

 ved, the two branches mull be fuppofed to be- 

 Vgjj^,, long to the fame vein, and the only probable 



explanation of the infulation of fo large a maf: 

 of rock will be by the firlt-mentioned fuppofi- 

 tion. This fad:, therefore, notvvithftanding the 

 great attention M. De Luc has bellowed on it, 



r 



ftill requires farther examination, before it can 



e 



'•Oct . 



Pproac 



fliifci- 



nera! ? ' 



} be decided whether it inclines to the H 



; 



"VS. 



Theory, as on the firll fuppolition, or is, as on 

 the latter hypothefis, equally balanced between 

 ^- it and the Wernerian. 



I 



orrefc^ 231. Whatever be the cafe with this flid, the 



general one of pieces of rock being found infu- 

 vek lated in veins, is certainly favourable to the no- 

 ic, 2d1i tion of an injedted and ponderous fluid having 

 joifS, originally fuHained them. Where, as happens 



in fome inftances, the ftones contained in the 

 |)ei! veins have no affinity to any of the rocks above, 



they cannot be fuppofed to have come any how 

 but from below, and to have been carried up by 

 the matter of the vein. The inflance from the 

 flip at the Huddersfield Canal has been already 



H W 



mentioned. 



232. The preceding obfervations have been 



■ 



principally direded againil that theory of veins 

 which fuppofes them to have been filled by de~ 



R 





aiii£ f' 







4 



