Crane.| Prospecting, Mining and Milling Machinery. 219 
Motive Power. 
The transference of all products of the mine is in most cases 
done by hand—that is, in hand cars. No motive power other 
than man power is employed, except as stated above, namely, 
in hauling from the dump piles to the mill, in which case 
both mule and steam power are employed, and the cable 
system referred to above. The relatively short distances 
from the face of the mine to the foot of the shaft and from 
the shaft to the mill preclude the application of .other forms 
of power to hauling. The short distances above mentioned 
are due to the method of mining employed, which in turn is 
due to the occurrence of ore bodies, necessitating vertical 
rather than horizontal mining. 
PROSPECTING, MINING AND MILLING MACHINERY. 
The mine operators in the Kansas lead and zinc district, 
during the past history of the operations there, have been 
rather slow in taking up the latest improvements in milling 
appliances placed upon the market. The tendency has been 
to hold to methods already in use, although known to be un- 
economical and inefficient, rather than to employ others, new, 
yet thoroughly tried and approved ; but with more recent and 
extensive development has come a demand for more efficient 
and economical methods and machinery. 
One of the finest problems in machine construction and 
arrangement consists in determining what to improve upon 
and what not to improve upon, and how to improve that 
which is known to be a proper subject forimprovement. On 
the whole, machinery becomes more serviceable in proportion 
to its simplicity of construction and operation, and this, in a 
way, seems to be the end sought after by the operators of the 
mills in this district. The advancement made during the 
past few years promises well for the future of the mining in- 
dustry there. 
Machinery for all mining work may be classed as prospect- 
ing, mining (or ground) and mill concentrating machinery. 
15—viili 
