Mining. (local.) [f. TYE sb.1 2.] trans. To separate (the ore) from the dross or refuse by means of a ‘tye.’ Hence Tying vbl. sb.
1757. in J. Lloyd, Old S. Wales Iron Works (1906), 23. Pipes for carrying Air or Water underground through their lands, or Tying of Wase or Wases.
1839. De la Beche, Rep. Geol. Cornw., etc., xv. 578. Some kinds of ore … required other operations after roasting, generally either tying by itself, or tying and jigging.
1881. Raymond, Mining Gloss., Strake (Corn.), an inclined launder for separating or tying ground ore in water.
