372 University Geological Survey of Kansas. 
all parts of the Galena portion of the district, even being 
hauled from four to five miles. The price paid varies both 
with value of mineral and length of haul. Tailings are sel- 
dom hauled more than three-fourths of a mile, while sands 
are hauled from two to three miles. The prices paid for rich 
sands, tailings, and poor sands and dirt are twenty-five, 
fifteen and ten cents per ton, respectively, which vary with 
distance. About one cent is added to the figures given, per 
ton per mile. 
The capacity of the mill for rough material per day of 
twenty-four hours is close to 120 loads of tailings, weight 
about 4600 pounds per load, and 60 loads of sand, approxi- 
mate weight, 5000 pounds perload. ‘The per cent. of mineral 
in tailings and sands is lz to 3, and 3 to 5 (even up to 10), 
respectively. 
The waste product from the tailings mill is raised by two 
bucket elevators, which act together; the first raising to a 
height of 55 feet and delivering to the second, which is 35 
feet high, and is 120 feet distant from the first. It also 
stands 35 feet above the ground. The total lift is then 90 
feet, while the lateral transference is 120 feet to the center of 
waste bank. Plate XLVI. The second elevator is driven by 
a sixteen horse-power engine, which receives its steam from 
the main power plant. 
That there is also considerable waste from the sludge mills 
is apparent from the amount of flour blende covering and 
bordering the sand banks of the streams below such* mills. 
The cause of such loss is mainly due to the speed of handling 
large quantities of low grade materials, coupled with the 
lack of efficient and economical slime treating apparatus, as 
hydraulic classifiers and similar devices. 
Good milling practice, however, dictates that such savings 
should be effected in the main concentrating mills rather 
than in special mills designed for handling the waste prod- 
ucts of the former, and the construction of the latest mills 
shows a tendency to follow along such lines. 
