from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A machine for concentrating ore.
from the GNU version of the Collaborative International Dictionary of English
- n. A machine for concentrating ore. See frue vanner.
from The Century Dictionary and Cyclopedia
- n. In mining, a machine for dressing ore; an ore-separator; a vanning-machine.
Sorry, no etymologies found.
The name most common here, "vanner" is probably the one least acknowledged, in England, said Arnold.
We all imagine Beckett to be that vanner and would like to set her up as the target of one of those Top Gear stunts where a caravan is destroyed by interesting technical means.
The Frue vanner is an endless indiarubber band drawn over an inclined table, to which a revolving and side motion is given by ingenious automatic mechanism, the pulp being automatically fed from the upper end, and the concentrates collected in a trough containing water in which the band is immersed in its passage under the table; the lighter particles wash over the lower end.
Chinamen were working these forerunners of the Frue vanner forty years ago in Australia, and getting fair returns.
I lately learned that the principle of one of our newest concentrating machines, the Frue vanner, was known in India and the East centuries ago; and we have it on good authority -- that of Pliny -- that gold saving by amalgamation with mercury was practised before the Christian era.
The Frue vanner will, as a rule, act well when the pulp is sufficiently fine.
The only faults with the vanner are -- first, it is rather slow; and secondly, though so ingenious it is just a little complicated in construction for the average non-scientific operative.
For a Frue or Triumph vanner, with 220 revolutions per min.
"Horse (vanner), thick set, 16 hands, 7 years, master 2 tons, reason sale, requires care when taken out of harness."
The vanner stands in front of a tub of water (kieve) and allows 30 or 40 c.c. of water to flow on to the ore.