arrastren.
An apparatus for grinding and mixing ores by the action of a heavy stone dragged round on a circular bed.
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society > occupation and work > equipment > equipment for treating ores > [noun] > for crushing ore
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1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 103 s.v. The arrastre is chiefly used for ores containing free gold, and amalgamation is combined with the grinding. (Sometimes incorrectly written arraster, arrastra, or raster.)
1883 Standard 20 Jan. 1/5 The whole of it has been treated, partly by means of arrastras.
This entry has not yet been fully updated (first published 1885; most recently modified version published online March 2018).
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n.1881