en the Slralification of Great Britam. 363 



cepting the rocks of Devon«liiie and Cormvall, wlach probal)ly 

 (says he) will appear to rank with tlie red marl in th.e r.riti^,h 

 beri'es; and so, perhaps, will those of the great part of Wales." 



This is Mr.Farev's Eni^lish Geology: and it is quite of a piece 

 with his English ^iiileralogy; for, upon finding some rock rest- 

 ing upon the sienite of Leicestershire, he with the utmost sim- 

 plicity tells us that he had "rather call it coarse slate, than risk 

 any of the German names greenstone, hornstone, sciiistus, trap 

 formation," — substances as diifereiit from one another, and from ^ 

 coarse slate, which I supjjose should be read clay slate, as can 

 well be imagined, and which it is hard to conceive how one who 

 pretends to be a mineralogist, and who even styles himself a 

 mineral surveyor, should not knoiu how to distinguish. After 

 having thus strangely perverted the order of succession as de- 

 termined bv the united labours of the ablest men in every coun- 

 try, will it "be believed that Mr. Farey should think himself of 

 sufficient authority to venture to assure us, that it is a vain at- 

 tempt to reconcile the facts of British stratification to the Wer- 

 neriaTi system ? This however is the ipse dixit of our English 

 Werner," and it becomes us to bow in humble submission to this 

 oracle of- geological knowledge. 



I have not anywhere said that Mr. Jameson considers the 

 limestone of Derbyshire to be floetz, and nothing but a deter- 

 mination to misrepresent my meaning could have induced Mr. 

 Farey so far to misquote \\\e: — for, after mentioning Professor 

 Jameson's opinion that the mountain limestone, and the old red 

 sandstone usually associated with it, belong to the first iloetz 

 formation ; I inmiediately add, " it is a ])oint yet to be ascer- 

 tained, whether the limestone associated with the coal-field of 

 Derbyshire is to be considered as belonging to the floetz or trans- 

 ition "series" — thereby implying that Mr. Jameson's opinion does 

 not extend to the limestone of Derbyshire, which is altogether 

 different in its geological relations from the limestone associated 

 with the coal-fields in other parts of England. 



But of all the misrepresentations which Mr. F. has made, the 

 most vexatious is that where he says that 1 seem to have taken 

 it for granted that the old red sandstone occurs univeisally be- 

 tween the Derbyshire-peak limestone and the coarse slate. I 

 have nowhere mentioned during the course of my paper either 

 of these rocks, and hardly know what they mean. But if Mr. 

 F. means by the Derbyshire-peak limestone the 4th limestone; 

 I have been so far from having taken it for granted that the red 

 sandstone is found under this rock, that in a separate jjaragraph 

 I have mentioned the absence of the red sandstone as one of 

 the circumstances which distinguish the Derbyshire limestone 

 from the mountain limestone in other parts oi England. This 



paragraph. 



