worth working, of which he gives ari in*
fiance at Cwmyftwith in Cardiganfhire j
metallic ore alfo occurs in the pudding-
ftone at Gourock, near Greenock, and in
a fingular ftone near Loflymouth, which
he defcribes as a compound of many fine
flones of beautiful colours.* He then
treats of float or fhoad ore and indications
of metal, on which fubjedt he is practically
inftru&ive. The rachel or broken rock*
called broil by the Cornifli miners, he con-*
fiders as worthy of particular attention;
but he is led into fome repetitions con-*
cerning the foft mineral foils, and what the
miners call mother chun or guhr. He then
combats the opinion, that metallic veins
are peculiar to mountains. Among the
mofl productive ftrata,.he enumerates lime-
* From fpecimens it is now found, that this rock con-
lifts of petrofilex, with fome galena and quartz cryftal, fa
that M r -W . has here indulged his imagination only. %
ftone,
ftone, and what he calls the indurated argillaceous
mountain rocks and granite ; but
he looks upon the fecond as the moft
abundant, as affording the rich mines' of
Lead Hills, Tyndrum, and others in Scotland
; thofe of Cardiganfhire, of Yorkfhire,
Weftmorqland, and many parts of the north
and fouth of England.
He now falls into feveral repetitions concerning
flips, &c. and in p. 408, defcribes
the various kinds of lead ore, afterwards
proceeding to thofe of copper and iron.
Some of the mifcellaneous remarks here
introduced are curious, fuch as that p. 411
concerning the Roman works at Daren-
vawr, and the richnefs of the lead of Cardigan
; that concerning the veins of copper
near Old Wick in Caithnefs; and that found
in limeftone at Loch Kifiern, upon the weft
coaft of Rofshire, oppofite to the ifle of
Rafay ; that concerning the copper, filver,
lead,