Jiemarfis on Mr. BakeweWs Section. 173 



2d plate ; and also of solicitins^ the assistance of your Correspon- 

 dents, for astrertaining two very interesting facts, viz. 1st, Is the 

 Preston-Hows Limestone iV/airfleiia?/ f*; and, 2dly, Is it, and the 

 grit below it, unconfu7-malle in any part, to the Coal-measures 

 and seams of Coal below them ?. 



I would also bea^ to solicit here, the careful consideration by 

 my able Friend, Mr. David Mushett, of what has been btated 

 above, and to request a further communication from him to you, 

 as to the yellow Limestone covering Coal-measures near Newent, 

 in Gloucestershire, mentioned in your xlth volume, p. 54 : — 

 Whether this Limestone (ranging I believe almost uninterruptedly 



vale of Clwyd, p. 1G3, and numerous othsr places) when they begin to bend down 

 into the Trough between these last mountains and those in which the Lakes are 

 situated. 



I be? further to mention concerning this Section, that while in Durham Count}-, 

 I did not see, or bear from Mr. Arrowsmitb and other practical Colliers ivitli whom 

 1 conversed, of any Coal-seams which regularly I'as^et. towards the East, instead of 

 continuing on and passing under the j'ellow Limestone: I hope therefore that 

 Mr. B. wiil favo ir me and your Readers by a little more precision, as to the actual 

 line of his .Section in this part, and the truth of its representation, to the left or 

 westward of his letter B. I heard of the Coal being in some places cut off, and 

 cropping out before f came to the Limestone (p. 84). But on inquiry, the former 

 of these seemed only ordinary cases of faults, and the latter, as far as they weie 

 not altoj:ether supposititious, seemed only local mmg-i of the strata against biimps 

 in those beneath: but no final ['assets dawn hill were mentioned, such as the Section 

 represents. 



At the bottom of pa^e 90, Mr. B. appears to apologize to your Readers, for 

 makins a quotation, "in the lang;n3ee of hypothesis," from Mr. Forslcr's work, 

 (p. 126); it had however I think been better for Mr. B's reputation and the cause 

 of truth, that the whole should h.-we been omitted; since in searching through 

 Mr. F's work, not a sentence will be found of his to countenance the Plulonic idea, 

 of Mountains being" thrust through the superiicial covering of the Globe," by 

 imacinary subterranean Fires!. The following is an essential part of the sentence 

 which Mr. B. has pcrfially quoted, following the words "Scotland and north- 

 ward;" VIZ. "The mines at Leadbill and Wanlock-liead are in this rock, as are 

 also the (lilack-lead) Wad-Mines in liorrowdale, and several other mines of Lead, 

 &.C. in different places. Blue Slate, the elegant covering for Houses, is quarried 

 out of Ihi.-i ror/c in .-icvcral places of Cumberland." If «e turn to page '2?, Note, 

 we shall find .Mr. F's own tielinition of the woid dyke, used at the btginninp of 

 the passau'c quoted, (not " clyke or vein" as Air. B. picviously intirnates,) to be, 

 '* a natural c/nr A', <is-u re, or chasm in the strata, which cha^m is commouly filled 

 wp with hclera^cueous matter." All which I think fully exclude the interpretation 

 that Mr. H; has attempted, of this pass:ige in Mr. Forster's Book; the obscurity 

 at the beginning of «hich passage, I have been used to attribute, to an error of the 

 pre-s. in wrongly joining an unacknowledged quotation from some Author (of 

 «hich unfortunately Mr. F's Book furnisues numerous instances) in the middle 

 of his own account of dykes of stone. 



The unfortunate (ignre which Mr. B. must have cut, from indulging in the e his 

 favourite Plutonic whims, as to the thrusting up of the inass of the Cleveland or 

 eastern Moorland Mills, and his consequent infrrcnce of inclining strata from their 

 centre, contrary to the f.u-ts| (sec Pliil. Mag. vol. xliii. pp. 257 and G.58,) would, 

 I khould have thought, operated, to prevent similar indulgences again, so near to 

 tl:c fame district. 1 had entertained the hope, that the forthcoming Edition of 

 NIr. B's fJcology, would be freed from these Plutonic blemishes, and wish I may 

 (ioi be dLtiaj)poiiitcd on it.'> appearance. 



firom 



