funnel box

funnel box (plural funnel boxes)

1. (mining) An apparatus for collecting finely crushed ore from water.
   • 1790, Ignaz von Born, New Process Of Amalgamation Of Gold And Silver Ores:

     The calcined stuff, as it comes from the furnace, is thrown through a hopper or shaking funnel box between two metal cylinders, through which both the coarſer particles and clods fall

• “funnel”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.