National Geographic : 1936 Feb
Photograph byW.E.Johnson A SLUICING STREAM, MORE POWERFUL THAN A FIRE HOSE, WASHES GOLD FROM SKIPPERS GORGE The nozzle, called a "giant" or "monitor" by miners, is fed by a metal pipe often more than six inches in diameter. Itmay bepointed todirect thepowerful water jet in any direction. Large bowlders are removed from the gold-bearing gravel by a derrick (center background). The earth isthen swept bywater through sluice boxes, where the gold, particles settle and are trapped by pockets or cleats in the bottom. The rapid colonization of SouthIsland may betraced inpart tothegold rush ofthe 1860's, when the precious metal was found in Otago and Westland. Some lands still produce paying quantities by dredging, sluicing, and panning (see page 167).