Mr. Farey’s Notes on Mr. Bakewell’s Geology. 121 
{P.182] larger than that part of the channel of the Sea which now 
occupies the denudation, (and rests partly on under-s/rata 
to the (halk) is a very improbable supposition (see my Note 
on p. 185); and Mr, B. must not avail himself, in this case, 
of the existence of a vast series of strata on the Chalk, 
which supplied edges, (since “broken down” by the Chan- 
nel) to retain the waters of his Lake, since these upper strata, 
are the very things 4o be accounted for, and for the formation 
of which alone, were the Lakes of the Paris Gentlemen and 
himself, invented ; although ‘the assumption of imaginary 
facts in Geology, has a tendency to retard the progress of the 
science, more than any other cause.” Mr.B.P. M. x1. p.47. 
183, 1. 19, subsidence of mud*.—* Mud will not form strata, 
except perhaps of alluvial Clay or loam, but more probably, 
* les marnes argilleises noires,” p. 336. 
184, ]. 16, osseous remains *.—* The fossil Rones of Gibraltar 
are found im Caves or fissures, partly filled with calcareous 
Tufa, near to the Tarfes, at the S end of the Gibraltar 
Rock, as I have been informed, see page 18, and M. Cuvier 
has stated. 
185, 1. 9 and 10, waters in the Baltic*.—* Here Mr. B. seems 
supposing, the nerthern edge of the Chalk, from Flam- 
borough-head to Jutland, Zealand and Gothland, (P. M. 
xxxv. p.131), to be entire, and to act as a partial or an en- 
tire dam, to a greater /.ake, than that which 1 have objected 
to in my 2nd Note on p. 182, and here my objections will 
apply with greater force. 
M. Meicrotto long preceded Mr. B, in the assumption of 
large Lakes in the north of Europe, see M. De Luc’s Geo. 
Trav. in France, &c. i. 420. 
1. 20 and 21, in Chalk differ +—+ The organic Remains, 
in a large proportion of nearly ell the slrata which contain 
them, differ most obviously from each other, Rep. i. 109; 
and I entertain no doubt, that when sufficiently minute and 
extended examinations and descriptions of the Reliquia are 
made (Mont. Mag, xxxiii. p. 514), that the species thereof 
will characterize the different sfra/a, and even the different 
beds, in many strata, in a very satisfactory manner. Mr, 
Sowerby’s work called ‘ Mineral Conchology,” of which 
five numbers are publistied (9 now), is deserving of every 
encouragement, towards this end, by those who have it in 
their power, to send him ample and perfect specimens of 
» fossil shells, with their exact loca/ifies ; and when it can be 
done, their places in the strata also : and when several sorts 
of shells are sent, to distinguish those which are found up- 
permost, and ‘how far above each other in the in 
y 4 
