Mr. Farey’s Notes on Mr. Bakewell’s Geology. 31 
P.169, |. 7, upper or soft Chalk *.—* P. M. xxxv. p. 130, 
. and Rep.1. 111. 
1. 20, called chert ¢+.—tf Rep. i. 272. 
171, |. 23, lime and flint are changed *.—* Rep. i. 272, 
and 415: in Notes on my Paper on the Ashover De- 
nudation, mentioned in a Note in my first Letter 
(p. 55), several instances are mentioned, and the cir- 
cumstances stated, under which such or er ae changes 
appear to me to have happened, to different substances, 
when lodged in the alluvium: to the Slate Rubble on 
Whittle Gillin Charnwood Forest, for instance, see 
my Note on Mr. B. p. 291. 
172, 1.13, layers of flint *.—* P.M. xxxv. p. 130, and 
Rep. i. 112. 
1. igand 20, building-stones +.—t Totleralves Re- 
che, and Ryegate stone, &e., Rep. i. 112. 
1, 24 and 25, last or uppermost ¢.——{ That Chalk is. 
not the uppermost regular stratum in England, is now 
very evident, in the northern part of the Isle of Wight, 
Mr. B. p.177 and 335, P. M. xli. p. 224, and 461, 
vol. xxxv. p. 132, and vol. xlii, p. 395. 
1. 25, alluvial ground **,—** The doubts formerly 
of my friend Mr. Benjamin Bevan, and others, as to 
the London Clays and Sands being regular strata, P.M. 
Xxkv. p. 137 §, should I think be entirely removed, by 
the subsequent excavations in Highgate Hill and under 
yde Park, &c. My worthy friend Mr. William At- 
kinson, Architect, of Bentinck Street, has also suc- 
cessfully investigated the nature of the Chert Nodules, 
which principally gave rise to the doubts alluded to, 
by collecting great numbers from the Gravel Pits and 
Roads near “London, and causing them to be sawn 
through and polished :—they almost invariably prove 
§ At page 132 of the volume here referred to, I stated six different sugges- 
tions, in the form of queries, regarding the identity of the London and the 
Paris strata; the fourth of these, on which there is a note at the bottom ofthe 
page, relates to a modified or altered nature of these strata (such as is men- 
tioned of Red Marl and of Limestone Shale, Rep. i. 148, and 228; of Grit- 
stones and of Coals, in my Notes on Mr. B’s pages 44, 125, &c. &e, ); and 
whereon, an Officer in one of the Societies to whom, I recommended the 
consideration of this question, has lately mentioned, the probability, that 
the blue Clay of London and the calcaire grossier or coarse Limestone of Paris 
are parts of the same deposit or stratum, “ and that from local circumstances 
the clay has prevailed in the ore, and the calcareous matter in the other,’ 
P. M. xiii. p. 398. 
At the bottom of page 136, vol. xxxv. I suggested, that the Sc/enite of the 
London Clay (as in the Croydon Canal on Plow-G: arlic Hill SSW of Dept- 
ford), may answer to the Gypsum of the neighbourhood of Paris. 
of 
