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BOOK VIII. 



the box ; as soon as these compartments are full and the water has begun 

 to flow over clear, the little launder through which this water enters into the 

 box is closed, and the water is turned in another direction. Then the 

 lowest riffle is removed from the sluice, and the sediment which has 

 accumulated flows out with the water and is caught in a bowl. The 

 riffles are removed one by one and the sediment from each is taken into a 

 separate bowl, and each is separately washed and cleansed in a bowl. The 

 larger particles of gold concentrates settle in the higher compartments, the 

 smaller size, in the lower compartments. This bowl is shallow and smooth, 

 and smeared with oil or some other slippery substance, so that the tiny particles 

 of gold may not cling to it, and it is painted black, that the gold may be more 

 easily discernible ; on the exterior, on both sides and in the middle, it is 

 slightly hollowed out in order that it may be grasped and held firmly in the 

 hands when shaken. By this method the particles or concentrates of gold 

 settle in the back part of the bowl ; for if the back part of the bowl is 

 tapped or shaken with one hand, as is usual, the contents move toward the 

 fore part. In this way the Moravians, especially, wash gold ore. 



The gold particles are also caught on frames which are either bare or 

 covered. If bare, the particles are caught in pockets ; if covered, they 



A— Plank. B — Side-boards. C — Iron wire. D — Handles. 



