1little scrubber, which has
a handle of half the length, and with this he cease
lessly stirs the concentrates or tin-stone which have settled in the upper
part of the strake; in this way the mud and water flow down into the
transverse launder, and from it into the settling-pit which is outside the
building.
lessly stirs the concentrates or tin-stone which have settled in the upper
part of the strake; in this way the mud and water flow down into the
transverse launder, and from it into the settling-pit which is outside the
building.
Before the short strake and the jigging-sieve had been invented,
metallifer
ous ores, especially tin, were crushed dry with stamps and washed in a large
trough hollowed out of one or two tree trunks; and at the head of this trough
was a platform, on which the ore was thrown after being completely crushed.
The washer pulled it down into the trough with a wooden scrubber which
had a long handle, and when the water had been let into the trough, he stirred
the ore with the same scrubber.
ous ores, especially tin, were crushed dry with stamps and washed in a large
trough hollowed out of one or two tree trunks; and at the head of this trough
was a platform, on which the ore was thrown after being completely crushed.
The washer pulled it down into the trough with a wooden scrubber which
had a long handle, and when the water had been let into the trough, he stirred
the ore with the same scrubber.
A—TROUGH. B—PLATFORM. C—WOODEN SCRUBBER.
The short strake is narrow in the upper part where the water flows down
into it through the little launder; in fact it is only two feet wide; at the lower
end it is wider, being three feet and as many palms. At the sides, which are
six feet long, are fixed boards two palms high. In other respects the head
resembles the head of the simple buddle, except that it is not depressed in the
middle. Beneath is a cross launder closed by a low board. In this short
strake not only is ore agitated and washed with a wooden scrubber, but boys
into it through the little launder; in fact it is only two feet wide; at the lower
end it is wider, being three feet and as many palms. At the sides, which are
six feet long, are fixed boards two palms high. In other respects the head
resembles the head of the simple buddle, except that it is not depressed in the
middle. Beneath is a cross launder closed by a low board. In this short
strake not only is ore agitated and washed with a wooden scrubber, but boys