136 



DRESSING OF ORES 



two above its surface, and so divided that one quarter of it serves for the reception 

 and equal distribution of the slime, whilst the other three quarters supply clear 



water ; b, launder for supplying slime ore, behind which is another not shown, for 

 bringing in clear water, o, trough supplying additional water to the stuff 

 agitated by the brushes. One end of this water-trough is fixed about the 

 middle of the table, whilst the other advances in a curved direction nearly to the 

 circumference. 



Concave Buddie. The object of this apparatus, fig. 732, is to concentrate on the 



732 



periphery of the floor, instead of the centre. This arrangement gives an immense 

 working area for the heads, and at the same time admits of the separation of a greater 

 portion of the waste than can be effected by the ordinary round buddle. After the 

 slimy water has been discharged on the edge, the area over which it has to bo distri- 

 buted is gradually contracting, thereby increasing the velocity of the flow, and 

 enabling it to sweep off a proportionate quantity of the lighter matter associated with 

 the ore. a represents the inflow slime launder; b, a separating trommel, through 

 which the slimes pass previous to their entrance into the launder a. c, outlet launder, 

 for taking off castaways ; d, arbor giving motion to the buddle arms and diagonal 

 distributing launders attached thereto, held by the braces w uf ; e, bevel wheel on 

 driving arbor ; /, downwright launder, to which is affixed a regulating cock, k, for sup- 

 plying slimes to trommel ; h, launder for delivering clean water to circular box m, 

 and which water passes through slot openings at p p, uniting with and thinning the 

 slimy matter previous to its passing into the diagonal delivery launders ; I', circular 

 pit for receiving tailings. Attached to the wooden bar # is a piece of canvas with 

 corresponding pieces depending in a similar manner from each arm, and which serve 

 to give an even surface to the stuff in their rotation. The slimes flow from four 

 diagonal launders, each having its upper end in communication with the box I, The 



