338 Mr. Farey’s Notes on Mr. Bakewell’s Geology. 
[P.314] 1. 24, if slowly cooled $.—+ At the Iron Furnace (and 
Coal-works) to which Mr. B. alludes in p. 282, Mr. David 
Mushet observed, that the Slag let out of the Furnace and 
quickly cooled. by throwing water on it, had often, perfect 
short octagonal prisms of whitish slag, found in cavities 
within it, and some small transparent cubic crystals, &c. 
315, 1. 7, shrinking in of the basalt* —* The crystallization 
of Basalt on the large scale, is so imperfect, before exposure 
on or near to the surface, that it is found a solid and homo- 
geneous Rock (except as to imbedded masses), whenever 
sunk or driven to, in the deep, in Mines, and the amyg- 
daloidal holes are then all full of spar, &c. Rep. i. 377, see 
my Note on p. 123, and P. M. xliii. p. 136. - 
317, 1. 4, is owing to the mica *,—* Rep. i. 428 and 466. 
1. 9, dividing in a contrary directiont.—t A phenomenon 
regarding stratification, which I have called straiula, Rep. i. 
155, is here alluded to, and it rather surprises me, that Mr. 
B. has not in his work, taken more notice of the fact, that 
in many Coal-measure and other Rocks, of Gritstone in 
particular, certain beds, are uniformly crossed at a high 
angle by inferior stratification ; these stratula ending with 
an oblique or bevelled end at top and bottom: in different 
beds in the same quarry, the s¢ratu/a will sometimes be found 
inclined at different angles, and sometimes in contrary di- 
rections, from those in other Beds. Writers, seem to have 
been little acquainted with this phenomenon, (Mont. Mag. 
xxxill. p. 517, P. M. xxxviii. p. 357, &c.) and many er- 
roneous descriptions of the dips of strata have been given 
in consequence. Mr. Townsend supposed, when he saw the 
stratula of a thick bed of Rock near Bath, that an enormous 
- convulsion had happened, by which the strata were first 
. tilted almost to an angle of 46°, and then their fop edges 
(and he tells us nothing of their lottom edges) were swept 
or worn off to 2n exact plane, and that after this, other strata 
were horizontally deposited upon them! Such, I am inclined 
to think, have in many instances been, the “ unconform- 
eble’’ masses, described by the Anglo-Wernerians, see my 
Note on p. 45. 
318, |. 9, was in a solid state *.—* As happens very frequently ~ 
to Gritstones, with argillaceous cements, which are burnt for 
the Roads, (Rep. i. 164, and iii. 256), and thereby assume 
a pretty regular columnar structure. 
325, 1: 22, great ecliptic days*.—* But why need these grand 
events be measured by days of any kind?, The Mosaic ac» 
count, here obliquely glanced at, does not require it ; if A 
the 
