1it on each edge narrow strips, of no great thickness, and
fix them to the beams
with nails. They agitate the metalliferous material with wooden scrubbers
and wash it in a similar way. As soon as little or no mud remains on the
canvas, but only concentrates or fine tin-stone, they lift one beam so that
the whole strake rests on the other, and dash it with water, which has been
drawn with buckets out of the small tank, and in this way all the sediment
which clings to the canvas falls into the trough placed underneath. This
trough is hewn out of a tree and placed in a ditch dug in the ground; the
interior of the trough is a foot wide at the top, but narrower in the bottom,
because it is rounded out. In the middle of this trough they put a cross
board, in order that the fairly large particles of concentrates or fairly large
sized tin-stone may remain in the forepart into which they have fallen, and
the fine concentrates or fine tin-stone in the lower part, for the water flows
from one into the other, and at last flows down through an opening into the
pit. As for the fairly large-sized concentrates or tin-stone which have been
removed from the trough, they are washed again on the ordinary strake.
with nails. They agitate the metalliferous material with wooden scrubbers
and wash it in a similar way. As soon as little or no mud remains on the
canvas, but only concentrates or fine tin-stone, they lift one beam so that
the whole strake rests on the other, and dash it with water, which has been
drawn with buckets out of the small tank, and in this way all the sediment
which clings to the canvas falls into the trough placed underneath. This
trough is hewn out of a tree and placed in a ditch dug in the ground; the
interior of the trough is a foot wide at the top, but narrower in the bottom,
because it is rounded out. In the middle of this trough they put a cross
board, in order that the fairly large particles of concentrates or fairly large
sized tin-stone may remain in the forepart into which they have fallen, and
the fine concentrates or fine tin-stone in the lower part, for the water flows
from one into the other, and at last flows down through an opening into the
pit. As for the fairly large-sized concentrates or tin-stone which have been
removed from the trough, they are washed again on the ordinary strake.
A—CANVAS STRAKE. B—MAN DASHING WATER ON THE CANVAS.
C—BUCKET.
D—BUCKET OF ANOTHER KIND. E—MAN REMOVING CONCENTRATES OR TIN-STONE
FROM THE TROUGH.
D—BUCKET OF ANOTHER KIND. E—MAN REMOVING CONCENTRATES OR TIN-STONE
FROM THE TROUGH.