A—LARGE BOWL B—ROPES. C—BEAM. D—OTHER LARGE BOWL
WHICH COINERS
USE. E—SMALL BOWL.
it. This bowl, when shaken, is held in one hand and thumped with the other
hand. In other respects this method of washing does not differ from the
last.
USE. E—SMALL BOWL.
it. This bowl, when shaken, is held in one hand and thumped with the other
hand. In other respects this method of washing does not differ from the
last.
I have spoken of the various methods of washing sand which contains
grains of gold; I will now speak of the methods of washing the material in
which are mixed the small black stones from which tin is made20. Eight
such methods are in use, and of these two have been invented lately. Such
metalliferous material is usually found torn away from veins and stringers
and scattered far and wide by the impetus of water, although sometimes
venae dilatatae are composed of it. The miners dig out the latter material
with a broad mattock, while they dig the former with a pick. But they dig
out the little stones, which are not rare in this kind of ore, with an instrument
like the bill of a duck. In districts which contain this material, if there is
an abundant supply of water, and if there are valleys or gentle slopes and
hollows, so that rivers can be diverted into them, the washers in summer
grains of gold; I will now speak of the methods of washing the material in
which are mixed the small black stones from which tin is made20. Eight
such methods are in use, and of these two have been invented lately. Such
metalliferous material is usually found torn away from veins and stringers
and scattered far and wide by the impetus of water, although sometimes
venae dilatatae are composed of it. The miners dig out the latter material
with a broad mattock, while they dig the former with a pick. But they dig
out the little stones, which are not rare in this kind of ore, with an instrument
like the bill of a duck. In districts which contain this material, if there is
an abundant supply of water, and if there are valleys or gentle slopes and
hollows, so that rivers can be diverted into them, the washers in summer
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