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418 [Doc. 151.
SWEDENBORG’S OFFICIAL LIFE.
11. Whether the Assessor desires to make one or two
trials without counting them , is a matter of indifference to
the Board of Mines, provided they be made at his own risk,
and provided the Board of Mines do not incur any ex
penses beforehand. Those trials, however, which are to be
the basis on which this presumed increase is to rest, are all
to be made most accurately, and of the same kind of ore as
that used by the other side, that is, as far as it can be
judged to be so.
12. The purity of the copper obtained by both parties
must be tested ; this testing must be done by a master of
known ability, and he must test both the copper obtained
by the trial of the mining district, and that which the
Assessor proposes to obtain by his process.
13. Assessor Emanuel Swedenborg in the humble pro
position which he submitted to His Royal Majesty, demands,
that the increase in the yield of copper of the first year
should be paid to him by the public, but the public will certain
ly not make any such payment, unless they who have the
benefit of this increased yield refund it to the public; thus,
should the trial succeed, it will be the mine-owners’ duty
to pay 10 per cent of the copper they obtain — this also
the Board of Mines are willing to grant, if only the pro
position will not lead to mere disputes. It is well-known
to all who have an accurate knowledge of this branch of
metallurgy, how many circumstances must conspire to obtain
the desired result: how much depends upon a proper mixture
of the ore, upon the position of the works, upon the work
people, the time, the putting on of coal, the cold roasting or
first calcining, upon the second calcining, and so forth. The
ore also is in itself so various that sometimes two stones
from the same lode are quite unlike; that the one contains
one kind of combinations, and the other quite a different kind ;
so that these things in so great a work as the above cannot
be separated, nor sifted apart. As so many circumstances
conspire, it is really good luck when they all work together,
and bad luck when there is a want or deficiency in some of
them . A miner may be as cautious as possible, yet as cir
cumstances change so much in the mine itself, and as his
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