296 University Geological Survey of Kansas. 
to the table. The pipe C is larger than the others, and fur- 
nishes wash water to the table through the larger portion of 
the trough, G. The pipes A and 8B supply water for clean- 
ing the table of the washed and concentrated minerals. The 
outlet of A is back or to the left of B, so that it sweeps the 
table and washes off the lighter mineral, while B is farther 
around to the right, and, by a somewhat stronger jet, sweeps 
the table clean. The mineral removed by A and B is caught 
in the boxes, H and J. These boxes are connected by laun- 
ders with the concentrate bins, or conducted back to the table 
for retreatment. 
From the above it is seen that slime reaching the table by 
means of the launder, K, and circular trough, G, will be uni- 
formly distributed over its surface by the thin sheet of water 
accompanying theslime. The feeding of the slime takes place 
only over about one-third of the area of the table, or between 
the points, O and P. Beyond QO, to the left, around to P, only 
wash water is admitted to the table, which thoroughly washes 
the mineral from all dirt, clay, etc., and also removes the 
small particles of gangue and light minerals which are value- 
less. That which remains on the table is the valuable mineral 
or minerals, if more than one exists in the slime. If only 
one mineral is present, or if there are two, and it is desired to 
save only one of them, only one jet of water is necessary, pro- 
vided the stream of wash water is sufficiently strong or the 
slope of the table is such as to bear off all but the heavier 
mineral. If, however, there are two valuable minerals, to 
save them both it is necessary to employ two jets of water, as 
before described. It is, however, better to employ the two 
jets of water whether one or two minerals are to be separated. 
Occasionally a circular trough is placed entirely around the 
table, so as to catch all of the minerals which escape. This 
trough is divided into sections by partitions, thus making as 
many products as there are sections. 
The direction of rotation of the table is reverse to that of 
the hands of a watch, and a continuous movement presents 
to the slime a clean table surface, as at Z, that is in turn 
washed by clean water, which together with the inclination 
and character of the surface perform the desired separation. 
