A—BEAMS. B—CANVAS. C—HEAD OF STRAKE. D—SMALL LAUNDER.
E—SETTLING
PIT OR TANK. F—WOODEN SCRUBBER. G—TUBS.
the second division, the third is similarly laid, and so on, one on the other.
If they are laid in the opposite way, the water flowing down carries the
concentrates or particles of tin-stone under the canvas, and a useless task
is attempted. Boys or men throw the concentrates or tin-stuff mixed with
mud into the head of the strake, after the canvas has been thus stretched,
and having opened the small launder they let the water flow in; then
they stir the concentrates or tin-stone with a wooden scrubber till the water
carries them all on to the canvas; next they gently sweep the linen with
the wooden scrubber until the mud flows into the settling-pit or into the
transverse launder. As soon as there is little or no mud on the canvas, but
only concentrates or tin-stone, they carry the canvas away and wash it in a
tub placed close by. The tin-stone settles in the tub, and the men return
immediately to the same task. Finally, they pour the water out of the tub,
and collect the concentrates or tin-stone. However, if either concentrates
or tin-stone have washed down from the canvas and settled in the settling
pit or in the transverse launder, they wash the mud again.
PIT OR TANK. F—WOODEN SCRUBBER. G—TUBS.
the second division, the third is similarly laid, and so on, one on the other.
If they are laid in the opposite way, the water flowing down carries the
concentrates or particles of tin-stone under the canvas, and a useless task
is attempted. Boys or men throw the concentrates or tin-stuff mixed with
mud into the head of the strake, after the canvas has been thus stretched,
and having opened the small launder they let the water flow in; then
they stir the concentrates or tin-stone with a wooden scrubber till the water
carries them all on to the canvas; next they gently sweep the linen with
the wooden scrubber until the mud flows into the settling-pit or into the
transverse launder. As soon as there is little or no mud on the canvas, but
only concentrates or tin-stone, they carry the canvas away and wash it in a
tub placed close by. The tin-stone settles in the tub, and the men return
immediately to the same task. Finally, they pour the water out of the tub,
and collect the concentrates or tin-stone. However, if either concentrates
or tin-stone have washed down from the canvas and settled in the settling
pit or in the transverse launder, they wash the mud again.
Some neither remove the canvas nor wash it in the tubs, but place over
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