[Ger.] (See quot. 1753.)
1753. Chambers, Cycl. Supp., Lech, in metallurgy, a term used by the miners to express the gold ore which has been powdered, and washed, and afterwards run with the assistance of lime stone.
1756–7. trans. Keysler’s Trav. (1760), IV. 229. The Schemnitz ore contains a greater quantity of gold … than that of Cremnitz; but the hard ore of the latter yields more lech.
