A launder used for cleaning buckwheat, rice, and barley sizes of anthracite. It
has three distinguishing features: (1) a mixing tank at the head end of the
machine, (2) a baffle in the bottom of the machine next to the mixing tank to
facilitate the stratification of the solids in specific gravity layers, and (3)
the use of a screen and bed of slate in the free discharge boxes. Mitchell
Source:
Dictionary of Mining, Mineral, and Related Terms
