238 University Geological Survey of Kansas. 
employed, where only a slight elevation is necessary and 
therefore little inclination is needed. ‘The batter is usually 
two inches to the foot. | 
Tue Taitines ELevator.—The tailings elevators are, as a 
rule, made of three frames placed side by side, which are, 
when erected, fastened together by mortised cross timbers. 
These frames divide the shafts so constructed into two com- 
partments, one of which is about two-thirds the cross-sectional 
area of the other. The smaller compartment is closely 
boarded up, while the larger one has a side left open; this 
side is usually that on the inclined or elevating side of the 
elevator. The open side is cleated by strips of board placed 
transversely and about one foot apart, forming a ladder way 
leading to the top of the elevator. Plate XX VII. The closed 
compartment comprises the driving band or belt box, while 
the open compartment contains the elevator proper, and is 
left open so as to allow of easy access to the elevator belt and 
buckets. The tops of both of the compartments, which com- 
prise the whole of the top of the shaft or elevator, are capped 
by a box which fits upon the framework of the elevator. 
The height of tailings elevators varies from 25 to 60 feet, 
while the width is usually about four feet at the top and six 
to ten or twelve feet at the bottom. 
The diameter of the elevator pulleys is from eighteen 
inches to two feet, and the faces range in width from twelve 
to fourteen inches. 
Two elevators are occasionally employed in series to carry 
tailings to the top of the waste piles. Such an arrangement 
is to be seen at the sludge mill situated between Galena and 
Empire. Plate XXVI. This is the only case of the kind 
noticed, and is necessitated by the large amount of material 
handled and the rapidity of the growth of the pile. The 
tailings elevator is placed at the end of the mill opposite the 
crusher room, or at one end of the jig room, and usually 
stands from 50 to 60 feet in height. 
Tailings Elevator Sluiceway.—The sluiceway or launder that 
bears the tailings from the elevator to the tailings pile is sup- 
ported by a frame or trestlework of plank, the construction 
