COPPER, TIN, AND LEAD MINES. 279 
SO little terror while re*ascending, 
'• Nvinp*^ j of being let down, that I am 
'' DPrf’ repetitions, I should have 
'' ** *i>e indifferent to the undertaking. So strong 
' custom on the human mind, and so 
^'nilia/'to^e does danger or horror become, when 
continual trials !” 
'tW^t't the whole extent of Sweden, the iron mines 
\ employ upwards of twenty-five thou- 
t( and yield annually upwards of fifty-seven 
ai*H metal. It has been calculated that the 
d forges, which give to the iron the degree of 
’"''CsT'* V ^ 
tour hundred thousand loads of charcoal. 
before it can be used, consume annually 
junr m ’ ■ ■ 
"“Alis OF COPPER, TIN, I.EAB, &C. 
% Purest 
ul] '"iiie, popper obtained in Europe is the produce of 
j°' ’i'o Swedish province of Dalecarlia. The 
’■iijj Pse ® brief description of the principal of tliese 
vlUity^ 'd gloomy caverns, all of which boast a high 
S * lit ! ' ° 
® curiosity Is first attracted by the hydraulic 
'tfip’it On'"' ' die destined to convey the water to the 
tlip* diters, and the power of which is such, that 
't((i,*'st. 'dels has a diameter of not less than forty- 
■^ydother wheel, of proportionate magnitude, 
J** *^I'core from the mine to the surface of 
''d o" admirably constructed, llegular circles 
Mir laiv! round these the chain rises. 
_ or smaller circumference, in proportion to 
? ■•ti "‘la '■d ''d made, so as to counterbalance the 
I’tlf ^iofjy ''dsequ^utlyihe increased motion of the bucket. 
|i^ ’he " 'dst chasm of a tremendous depth presents 
being the part of die mine which 
V'iu 'dharf^i dither through the ignorance or neglect of 
sq -a. *■ 'd" the management of the works, the ex- 
hi fdhened the foundations of the hill, that the 
it?'’-' ''’’d a’j^duving ^ most chaotic scene of precipitated 
resembling the mouth of a vol- 
V''”ld hecii since taken that no such dis- 
Slallgfj^'" occur. Plans and sections arc drawn of 
&c j and, where the prosecution of the 
