370 University Geological Survey of Kansas. 
speed of 6 revolutions per minute. One of these buddles is 
employed as a rougher, the other as a cleaner; the former 
has the pit raised above the floor, for convenience in handling 
the products, while the latter is sunk below the level of the 
floor. Besides these large buddles there are three 9 foot, all 
metal buddles of a new design, and but recently patented. 
The drums of these buddles are 6 feet in diameter, while the 
buddles proper are 9 feet, thus leaving only an 18 inch annu- 
lar space for the slimes to collect upon. The rims of these 
buddles are made of sheet metal, and have a vertical adjust- 
ment of some 10 inches, which movement is produced and 
controlled by the driving mechanism of the buddles. The 
upward movement of the rims can be varied at will, being 
fast or slow as the mineral treated varies in richness. The 
usual rate of movement is 2 inches per hour. With this 
buddle there is no deep basin in which waste material can 
catch and accumulate, and an even flow is also secured radially 
from the centrally placed distributing apron. These buddles 
stand some distance above the floor on metal legs, and are, 
therefore, easily accessible. 
At present these new buddles are employed as roughers 
only. They are all driven at a speed of 14 revolutions per 
minute. 
A 3x12 foot hand buddle is operated in conjunction with 
the power buddles, which treats complex residues coming 
from the roughers. 
Two Wilfley tables are installed in this department and an- 
other one is to be added shortly. The tables are run ata 
speed of 225 strokes per minute and are the finishers of the 
plant. 
Two trommels handle the discharge from the dirt elevator ; 
the first in the series is a 9 foot jacketed screen, with diame- 
ters of outer and inner drums 48 and 30 inches, respectively. 
They are covered with perforated metal screens having 6 and 
1mm.round holes. The undersize from this trommel goes 
to another trommel, which is 10 feet long and 36 inches in 
diameter, and is covered with perforated metal with ? mm. 
round holes. The oversize from both trommels unites and 
