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FORTIA’S TRAVELS IN SWEDEN. 463
of the mine is not a mineral earth ; the whole of the ore is concentrated in one {pot not
in vein, but metallic mafles ; that upon which they are at prefent at work is imagined to
be of conic form, notwithftanding the oppofite affertion of Mr. Jars, in his metallurgi-
cal travels, a work in many refpects defervedly efteemed, yet which at the fame time is
not exempt from errors. Of pyrites that anfwer the magnet, found in the mine, there
is none but that of a greyifh caft, nor of any other defcription but the greenifh and the
whitith yellow ; the firft of thefe two contains copper alone, in the proportion of from
24 to 30 per cent; and on the proportionate mixture of thefe three pyrites, is it that
the richnels of the ore depends. The /efver /lag, or greyifhpyrites (mifreprefented by
Mr. Jars as reddifh,) never contains any copper.
Beneath is given an account of the expence of the mine from 1779 to 1788 together
with its produce,
(Pons of | Produce when ‘,
Free Mines.
Expence.
Years.| ore roafted. BERGE
si Sch. Lifpd. }Sch, Lifpd. | Rix. Dols. — Schih
1779) 1532319} 5090 519 59:94! 45
1780|156,9°7|5724 42 579139
1781} 164,492|5758 10 308 4 83,048 39
1982 /174,421/ 954 7 |306 14 | 66,783 27
1783 |163,750|6077 16 |224 11 753572 iI
1784] 195.47¢15898 19 |268 7 | 73.484 6
1785 |194.73210350 2 1332 17 | 67,473 | 20
1786/187,97515390 3 |234 6 | 62,837 42
1787|196,420| 6886 9 266 14 675828 15
1788!164,95016421 14 276, fa 65,766 47
The ore of Fahlun is poor, it was much richer formerly. In the ferenteenth century
the produce of the mine exceeded twenty thoufand fchippunds: at prefent the ore
yields no more than two per cent. of metal. Thegreat mine has four wells by which the
ore is drawn up, that of Adolphus Frederick, that of King Frederic, that of the Count
de Creutz, one hundred and twelve toifes deep, and that of Count Wrede. The fecond
is one hundred and twenty toifes deep.. There are fix tubs, two hydraulic engines, and
one for the pumps. The machines for raifing the ore are nine in number. ‘The great
mine is divided into five diftricts, which are to be reduced tothree. Each diftriét has
two infpectors at a falary of roo rix-dollars. The great mine and the free mines,
that is to fay thofe which belong to individuals, and pay no duty to the crown) are
united, (the fecond paragraph, page forty-fix, of the work of Mr. Jars is untrue.) ‘The
cord ufed for the well of King Frederic, weighs feven fchippunds : it might be better
made. The workmen are prohibited defcending by the means of the tubs, the vitriolic
liquid eating the cords, and even the iron chains ; the firft are of leather and laft about
a year. Laft year (1790) two hundred fchippunds of lead were extracted from the
mine, eight hundred marks of filver (the firft trial), and two hundred ducats value of
old.
F The ore which contains filver is heated in a reverberating furnace, in which by the
ation of the blaft-pipe on the fire the lead calcines and becomes litharge; the filver
when fufed falling on the afhes of which the crucible’is made.
The mine is divided into one thoufand two: hundred fhares forthe interior workalone <
the price of a fhare of late years has been from 166 to. 199 rix-dollars.
Below the produét for the laft twenty years is given. The firft {um indicates the divi-
dend of each fhare, and the fecond the expence of each fhare holden for the extrattion
OL
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