328 Mr. Farey’s Notes on Mr. Bakewell’s Geology. 
[P.278] This summit level, at SO9f. 10m. above the Sea, is pro- 
bably much more than ‘* 400 feet”’ lower than the bold edges 
of the Kinder Scout Hummock, that over-look it, since this 
would make their elevation only 1210 feet, instead of Mr. 
B’s 2100 feet! or instead of 1770 or 1800 feet as ought I 
think to result, according to my comparative estimation, and 
recollection of the heights of these hills, and supposing that 
we can rely on the height of Lords Seat, as stated by Col. 
Mudge: and because Mr. Nuttall in 1789 found the sum- 
mit of the Buxton and Manchester Road to be 1198 feet © 
above the Cromford Canal, which probably is about 248 feet 
above the Sea, and gives this point of the Road an elevation 
of 1446 feet. f 
279, 1. 15, 2 rises to the surface*.—* Quere Ist or 4th Lime- 
stone ?.—See my Ist Letter, vol, xlii. p. 59, 2d Letter, 
p- 112, and 3d Letter, p. 170, and Note on p. 274, 1. 8. — 
These Limestone Rocks Mr. B. represents as transition. 
Rocks, (see Rep. i. 298 Note); yet a very principal of the 
Anglo-Wernerian Writers, after admitting that some pet7i- 
factions do occur in transition Limestone, lately said (Ann. 
of Phil. iii. 116 Note), “‘ but hitherto as far as I know, no 
shells have been found in that Rock, nor anything else, 
except madrepores and othoceratites ;”—let any one who 
has read William Martin’s ‘‘ Petrificata Derbiensia,” say, 
whether this Wernerian dogma, will at all apply to the Peak 
hundreds of Derbyshire? The Geognostic assertion, that 
particular Classes, Orders, or even Genera of organic re- 
mains, characterise the Formations, as to their relative ages, 
or priority of deposition, and the consequent order of the su- 
perposition of the strata, (see Ann. of Phil. i. 205): appears 
to me vastly inferior, either in truth or practical utility, to 
the discovery by Mr. William Smith, about the yearl792, 
(Rep. i. 109), made without communication with any Wer- 
nerian pupil (if any such had appeared in this country at 
that time?) as to particular species of Shells, &c. that in- 
diseriminately belong to different genera, orders, &c. di- 
stinguishing, in a very marked and satisfactory manner, the 
greater part of the strata of England ;—has Mr. Jameson 
told us in his account of “ the Geognosy,” the sparticular 
species of shells and other organic remains, or attempted it, 
that characterise the numerous strata of Scotland ?, whence 
nearly all his British examples are drawn, or was he able to 
give such tests of his Geognostic deductions, as to any other 
country ?. 
281, 1. 1, red clay*.—* This Ironstone (like that near Coleford 
in Dean Forest and Merlin Griffith in Glamorganshire,) oc- 
curs 
