Agricola, Georgius, De re metallica, 1912/1950

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1Noricians11 collect ore during the winter into sacks made of bristly pigskins,
and drag them down from the highest mountains, which neither horses,
mules nor asses can climb.
Strong dogs, that are trained to bear pack
saddles, carry these sacks when empty into the mountains.
When they
are filled with ore, bound with thongs, and fastened to a rope, a man,
winding the rope round his arm or breast, drags them down through the
snow to a place where horses, mules, or asses bearing pack-saddles can
climb.
There the ore is removed from the pigskin sacks and put into other
sacks made of double or triple twilled linen thread, and these placed on the
pack-saddles of the beasts are borne down to the works where the ores
are washed or smelted.
If, indeed, the horses, mules, or asses are able
to climb the mountains, linen sacks filled with ore are placed on their saddles,
and they carry these down the narrow mountain paths, which are passable
neither by wagons nor sledges, into the valleys lying below the steeper
portions of the mountains.
But on the declivity of cliffs which beasts cannot
climb, are placed long open boxes made of planks, with transverse cleats to
hold them together; into these boxes is thrown the ore which has been
brought in wheelbarrows, and when it has run down to the level it is gathered
into sacks, and the beasts either carry it away on their backs or drag it away
after it has been thrown into sledges or wagons.
When the drivers bring
ore down steep mountain slopes they use two-wheeled carts, and they drag
behind them on the ground the trunks of two trees, for these by their weight
hold back the heavily-laden carts, which contain ore in their boxes, and check
their descent, and but for these the driver would often be obliged to
bind chains to the wheels.
When these men bring down ore from mountains
which do not have such declivities, they use wagons whose beds are twice
as long as those of the carts.
The planks of these are so put together that,
when the ore is unloaded by the drivers, they can be raised and taken apart,
for they are only held together by bars.
The drivers employed by the owners
of the ore bring down thirty or sixty wagon-loads, and the master of the
works marks on a stick the number of loads for each driver.
But some
ore, especially tin, after being taken from the mines, is divided into eight
parts, or into nine, if the owners of the mine give “ninth parts” to the
owners of the tunnel.
This is occasionally done by measuring with a bucket,
but more frequently planks are put together on a spot where, with the
addition of the level ground as a base, it forms a hollow box.
Each owner
provides for removing, washing, and smelting that portion which has fallen
to him. (Illustration p.
170).
Into the buckets, drawn by these five machines, the boys or men throw
the earth and broken rock with shovels, or they fill them with their hands;
hence they get their name of shovellers.
As I have said, the same
machines raise not only dry loads, but also wet ones, or water; but before
I explain the varied and diverse kinds of machines by which miners are wont

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