Some people construct a frame not unlike the one covered with canvas,
but shorter. In place of the canvas they set pieces of turf in rows. They
but shorter. In place of the canvas they set pieces of turf in rows. They
A—HEAD OF FRAME. B—SMALL LAUNDER THROUGH WHICH WATER FLOWS INTO
HEAD OF
FRAME. C—PIECES OF TURF. D—TROUGH PLACED UNDER FRAME. E—TUB IN WHICH
PIECES OF TURF ARE WASHED.
wash the sand, which has been thrown into the head of the frame, by letting
in water. In this way the particles of gold settle in the turf, the mud and
sand, together with the water, are carried down into the settling-pit or trough
below, which is opened when the work is finished. After all the water has
passed out of the settling-pit, the sand and mud are carried away and washed
over again in the same manner. The particles which have clung to the turf
are afterward washed down into the settling-pit or trough by a stronger
current of the water, which is let into the frame through a small launder.
The concentrates are finally collected and washed in a bowl. Pliny was not
ignorant of this method of washing gold. “The ulex,” he says, “after being
dried, is burnt, and its ashes are washed over a grassy turf, that the gold
may settle on it.”
FRAME. C—PIECES OF TURF. D—TROUGH PLACED UNDER FRAME. E—TUB IN WHICH
PIECES OF TURF ARE WASHED.
wash the sand, which has been thrown into the head of the frame, by letting
in water. In this way the particles of gold settle in the turf, the mud and
sand, together with the water, are carried down into the settling-pit or trough
below, which is opened when the work is finished. After all the water has
passed out of the settling-pit, the sand and mud are carried away and washed
over again in the same manner. The particles which have clung to the turf
are afterward washed down into the settling-pit or trough by a stronger
current of the water, which is let into the frame through a small launder.
The concentrates are finally collected and washed in a bowl. Pliny was not
ignorant of this method of washing gold. “The ulex,” he says, “after being
dried, is burnt, and its ashes are washed over a grassy turf, that the gold
may settle on it.”
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