That eflential mineral, Coal, which gives
birth and fupport to many of our rnanu—
fadures, appears in different parts of this
countiy. It is found in the greateft plenty
the north eaft, as has been before mentioned.
Towards the north weft of Der-
byfhire it is found again near Buxton, as
at Coit Mofs, on the edge of Chefhire. In
various places, for the diftance of feveral
miles from eaft to weft, neither the ftratum
of argillaceous grit, nor the coal, have appeared.
Coit Mofs is a confiderable mountain
3 or 4 miles weft of Buxton, compofed of
argillaceous grit; at the depth of 30 or 40
fathoms, beds of coal are found.
There appears a feruginous fhiftus-like
fubftance, feveral feet thick, incumbent on
the, coal, which decompofes by expofure ;
its bafts is argil with oxyde of iron.
The
The coal is a great relief to this mountainous
and cold country, and its effeds
are confpicuoully feen in a variety of ob-
jeds.
Sulphur combined with Iron, or Martial
Pirites.
IN enumerating the metallic ores, I fhall
firft mention iron, which appears in the
form of fulphuret or pyrites in various ftates,
but generally cryftallized in the odaedron,
cube, dodecahedron, &c. is frequently ma-
melated, elliptical, arborefcent, and kidney
form ; colour fhining bright yellow, fome-
times inclining to brown ; very brittle;
gives fire freely, and when conflided has
a very fulphureous fmell; it is frequently
compad, forming a vein.
Hematites,