2,86 
mikes, metals, akd gems, 
Burton’s mine is so extensive, that the mineral j,,iv 
cover 
mine is so exiensivc, ui.il luc — jv- 
two thousand acres of land.^ It ot , 
the gravel and fossil 
The gravel mineral is 
uic k,iavv,a a. — ° . 1 1 ill 
diately under the soil, intermixed with 
solid mineral weighing from oiw to htty pount ci‘*''’V 
the gravel is a sand rock, which being broke y 
is a sand rock, wlucli neing dioa..,; 
sand, and contains mineral nearly w , ,),e 
Ai-„4. -r,-., 17.^1 ■Rtit th«» mineral o , 
to a fine 
mineral iichia/ -- . ^ 
quality as that of the gravel. But die nuuera ° 
quality is found in a bed of red clay, undei i 
in pieces of from ten to five hundred poiini^ ^ 
the outside]of whicli is a spar, or fossil, ot a bui. 
the outsiae^oi wnicn is a spai, cilver> 
appearance, resembling spangles of gold and s ^ 
• 1 ir ^,,,1 .n.^" o n-i-A3otr*r cnpCihC - < 
it 
apuciiuun-c, o ,ri-avay. 
as the mineral itself, and of a greater specific b ' > 
beino- taken oft’, the mineral is solid, uncoi |j,ni 
any other substance, of a broad grain, and " 
loglsts call potters’ ore. jjje 
In other mines, in th'c vicinity of the ab°'e, ^ 
111 OUici uiiucn, ii» ‘■*■*0 • / r in l‘*‘ rtt' 
found in regular veins, from two to four teet ji 
containing about fifty ounces of silver 
lit’'' 
cull AlvVi/LAi- J * 
depth oftwenty-five feet the operations are irnpc 
id e-'i 
<4 
The whole of this mineral tract is very rich a , 
In Great Britain there are numeroiw ’ jj,y ^ 
among which may be cited diat of Arkm^ia* JP 1 
shire, and those with which Shropshire “b^ 
south of Lanerkshire, and in the vicinity ot ^ 
Scotland, are two Celebrated lead mines, 
annually above two thousand tons of metal. yfiiT’',/ 
nail-vein Lead-hills, has been worked fe niai 
has been productive of great wealth, ine ‘‘o j 
sidered as the richest lead mines of Europe. ff 
Several of the Irish lead mines have yielded f 
proportion of silver; and mention is niade“ f 
county of Antrim, which afforded, in thi / , 
lead, 
silver 
Sligo in Connaught ; and a third in the cohdy.'ijjr 1 , 
thirty miles from Limerick. The ores ot t i ),sr < 
two kinds, most msually of a reddish _ ^ 51I' j,/ 
the other, which was the riche’ _.,*a j 
glistering ; 
' oft' ^ 
rembied° a blue marl. The works were ilestf ^ 
Irish insurrections in the reign ot Chariei. 
Kf on account ot twS 
however, is still wrought 011 account of the 
