340 Dr. Kidd's recent IVork on Geology. 



where at about the distance of eight or ten miles," tlie Chalk 

 ridge of the Cliiltein and Gog-niagog Hills, near to the Cities 

 above named. 



Now it is observable, tJ^at neillicr Mr. Ilollowayor Dr.Wood- 

 ivard then, or Dr. K'idd now (althc distance of more than ninety 

 years) have sceYned to lie at all aware, tlsat the Black-heath Savd 

 must be found on Kewvwrket-hcalh, which is above the Chalk 

 (if there bee?/?/ regular stratum of sand there?) whereas ttieWo' 

 In/rn Sand, is far belcw t!ie Chalk (see Derby Report i. 1 11 and 

 112), and consequently, the two Ridges so described, if they 

 existed, must cross one another like a x (the algebraic sign) in- 

 stead of being ||, as was pretended. — Wliich, I would ask, is 

 TTJOst to be deplored, the ignorance still prevailing in the chief 

 Seats of Learning among us, as to the most obvima Geological 

 facts aronnd them?, or the pitiful design manifested in Dr. K's 

 Book, in the revival of these excnsaWe mistakes of former great 

 Men, of depriving a deserving, although a non-academical Indi- 

 vidual, of tbe merited rewards of his labours?. I have several 

 other appeals to make, against Dr. K's modes of selecting evi- 

 dences, as well as against his judicial sentences on different Geo- 

 logical points, but nnist reserve them for a season of more leisure, 

 and hasten ^o^v to remark on Mr. ^Gilby's very extraordinary 

 Letter in your last. 



Professor Jameson, in issuing to the world, his first version of 

 The Geognosy^ of Werner, deckred himself unable to determine 

 the "formation" to v^hich the Gypsum of Derbyshire (\rith its im- 

 bedding Red Marl) should be referred, because forsooth, " no 

 well educated Gcognost has ever comniiuiicated any observatioti > 

 regarding it;" and if we may credit Mr. G. H. Gilby in ytmr 

 .301st page, this great Geognost, remained in his perplexing di- 

 ienima,, as to " the real position of the red ground," or Red 

 Marl, until he fortunately read Mr. G's paper ! in your xlivth 

 volume, page 241. — That after so many ])ersons had labomed 

 at investigating and describing the Gypseous or Red ground of 

 England, so many hundreds oi pages of Wer?ierian Memoirs, 

 6eognostic Transactions, Geognostic Annals, &c. had been pub- 

 lishefi, he, Mr. G. should hear himself puhlicly announced, as 

 XhG first, the XV ell- educated, and the happy Geognost, who had 

 at last succeeded in solving this very knotty problem ! (and in 

 ymr work too, Mr. Editor!) m.ight well prove "])eculiarly gra- 

 tifying" to him, and may easilyhe supposed, to have given al- 

 most instant origin to the letter of severe rebuke to me, for Ijav- 

 ing dared, in your previous number, page 1G7, 169, &c. to speak 

 of the " position of the Red ground, in regard to the Coal ami 

 its accompanying strata/' witiiout expressly quoting as my au- 

 thority, his said paper, thai had been so hi'jhhi honoured! 



But 



