''''IsA, tin, and iead mines. 283 
them large nnd rich in ore. It is remaik- 
% 
’’ti 
lat 
'’ted sy ‘P ''srious parts of this coiiutv the earth has pro- 
w'’ ■■'n exuberance of this metal, as to afford it iii 
of 
lump.s of malleable copper, several pieces 
(’’’tcul'jy® in very carious vegetable form.s. I’he 
,j|’ >tt3„j, '’te named mnndic, found in the tin mines, was 
’"etal^^- t’^isidered of no other use but to nourish 
mine. In the reign of Queeii 
.'tivtj '• a laudable curio.sity tempted several private 
examine into its nature; but the design 
i^tld y. ’ ®nd the mundic was thrown, as useless, into 
ijj’t 3 c * the mbbish was collected. However, 
^ ’he » '“'fy ago, this purpo.se was effected by degrees , 
extracted from the ore now produces, on an 
’’’P"'ards of one hundred and fifty thousand pounds 
the in goodness the best Swedish copper, 
jtttiijg 9 ’"® '’self yields a proportionate quantity of lapis 
» £ctq making of brass. 
tt|Aabig Bill, near the river Dove, in Derbyshire, 
copper mine was discovered some years ago, 
V been worked to great advantage. In its posi- 
inclination, it differs from any mine 
y, Europe, Asia, Africa, or America ; 
0 co'^ copper ore not running in regular 
®'uking perpendicularly down, widen- 
bell. 
out at the bottom in the form of a 
V it four hundred and fifty feet beneath the river 
’tj,°I’Posite'^' 9 S the deepest mine in Great Britain. On 
cf vvhf'v!^ Ecton hill is a valuable lead mine, the 
htf^PpUf approach very nearly to the copper mine, 
an * ^ciuverted into brass by the agency of Ca- 
of zinc. It occurs frequently in beds, 
I’C'’’ Son exists in great abundance. The Mendip 
Cal ''^’!*®^®bire, were once celebrated for their 
i.” 9 ’’ue, which are now in a great measure ex- 
It 
’''.ir pby*° earth, and, being broken 
h,,’ ^bip} E exposed to the action of a current of 
Js' Cal' away the light earthy matter, and 
N!U?''Vssj 
k ^"be 'in 
’<1611^.’.. ’he galena sinks to the bottom, the 
'f'he whole is then tlirown into deep 
’ittifi * "'‘’f’ water, and agitated for a consi- 
' ' ■ ' ■ ■' cala- 
®Pcsited 
in the centre, and the earthy matter lie* 
