CUMBUAY (GREAT). GEOLOGY. 483 



distinguish this deposit from the red sandstone of the 

 English strata, as innumerable other circumstances do 

 from the red marie of the same country. The revolutions 

 of the surface have been produced by general laws ; 

 but those of the parts must have been subject to par- 

 ticular modifications of those actions, by which the re- 

 sults now visible have been determined. 



With respect to distinctions drawn from relative posi^ 

 tion to the primary rocks, there is no more cause for 

 surprise that the red sandstone of one district presents 

 important differences from that of another, although 

 equally incumbent on the primary strata, than that the 

 complicated series of the argillaceous schist of Bate and 

 the connected tracts, differs from that in which the same 

 rock occurs in Wales. The rule of conduct for a geologist 

 in this case, appears simple. If instead of being satisfied 

 with general terms, derived from examples of which the 

 analogy, if apparently obvious, is not ascertained, possibly 

 not correct ; if instead of prematurely classing together in 

 artificial arrangements, appearances which have not been 

 investigated according to all their natural affinities and 

 characters, the observer shall study and record facts, the 

 science of geology at large, not less than the red sand- 

 stone, will hereafter give ample indications of his industry. 



