138 



DRESSING OF ORES 



the trommel B, turned by the band c. The fine stuff passing through the perforated 

 cylinder D, falls upon the shoot F, and flows upon the concave table E. This table re- 

 volves in the direction of the arrow and acquires its motion by means of the strap o 



driving the tangent wheel and screw shown nt n. Concentric with the table a wrought- 

 iron pipe i is fixed, which is pierced with numerous small holes. The quantity of water 

 to this pipe is adjusted by the regulating cocks J a' j". Beneath the table is a ciivular 

 receptacle or bottom K, having three compartments for recei vi ng the washed stuff. From 

 a to rfthe jets of water are comparatively light; fronWtocthc forceofwater isin< 

 and still further augmented in that portion of the circle extending from c to o, whilst 

 from o to x it is sufficiently powerful lo clean the buddle. In each of the sections a 



