Agricola, Georgius - De re metallica

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1directions of the wind, throws both these substances on shore, and for this
reason the search for amber demands as much care as does that for coral.

Moreover, it is necessary that those who wash the sand or evaporate
the water from the springs, should be careful to learn the nature of the
locality, its roads, its salubrity, its overlord, and the neighbours, lest on
account of difficulties in the conduct of their business they become either
impoverished by exhaustive expenditure, or their goods and lives are
imperilled. But enough about this.

The miner, after he has selected out of many places one particular spot
adapted by Nature for mining, bestows much labour and attention on the
veins. These have either been stripped bare of their covering by chance
and thus lie exposed to our view, or lying deeply hidden and concealed they
are found after close search; the latter is more usual, the former more
rarely happens, and both of these occurrences must be explained. There
is more than one force which can lay bare the veins unaided by the industry
or toil of man; since either a torrent might strip off the surface, which hap
pened in the case of the silver mines of Freiberg (concerning which I have

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