130 
EFFECTS OF 
The upper coal is not noticed at Clints field; the white rock above 
it is no where so fine grained as at Smear hall. 
Without further details it is easily known from these sections 
combined, that the North Lancashire and Penyghent coals are iden- 
tical ; that the Ingleton coals are somewhat analogous to the lower coals 
of the Wigan and other coal deposits on the western side of the 
summit ridge, but present no peculiar agreements with those of the 
great Yorkshire coal tracts, either in thickness, or succession, or quality 
of coal, or nature of accompanying rocks. Some of the coal of Ingle- 
ton is of the nature of cannel coal. 
The following are the specific gravities of several sorts of coal 
found in the district of Bolland, Kirby Lonsdale, and South Lanca- 
shire, from my own experiments. 
Coal of the millstone grit and limestone series. 
Casterton fell — slaty, does not soil, shining, a little pyritous, smokes, 
but gives little flame 
Bentham, hard slaty, white ash 
Ditto 
Hutton roof— micaceous, slaty, sandy loose, without distinct grain, 
(or vertical cleavage) absorbs .027 of its weight of water 
Borwick — clean, shining, stripy coal, with curved faces 
1-623 
1-356 
1-295 
1-557 
1-505 & 1-463 
Coal of the Ingleton field. 
Ingleton — clean, shining, faces curved, crackles in water (absorbs 
•015 its weight of water) ... 
Ditto angles of cleavage 64° to 70° 
Ditto angle 54° ... 
Burton 
1-231 & 1-235 
1-195 
1-310 
1-242 
Coal of South Lancashire. 
Crom wick near Bolton 
Lancashire cannel, crackles and bursts in warm water 
... 1-331 
... 1-199 
