Report of the Bureau of Mines of the Department of Internal Affairs of ...

242 REPORT OF THE INSPECTORS OF MINES. Off. Doc.
chineiy. The following is a brief description of it: The boilers,
of which there are two, are of the Erie pattern and were built by
the Union Iron Works, of Erie, Pa., are 18 feet long and 6 feet in
diameter and each contains 78 three-inch diameter tubes. The boilers
rest on a firm foundation of brick and stone. Each boiler is equipped
with a consolidated nickel seated "pop" safety valve, regulated to 100
pounds pressure, and they are fed by two "Battle Creek," pumps with
an improved autom.atic injector in reserve. It is not necessary to use
both pumps, as one is capable of supplying both boilers and is so arranged
that one or both pumps will feed either boiler or the injector
can bo api)lied likewise. While both boilers are generally used to furnish
steam for the electric and haulage plants, also for the ventilating
fan and mine pump, they are so arranged that should anything
happen to one, it can at once be detached, and the other is capable of
furnishing power for service. The water supply is taken from tanks
by the pumps or injector and forced through two enclosed heaters,
the exhaust from the power engine being utilized to generate heat for
that purpose, and it is capable of raising the temperature of the water
from its normal condition in the tanks to 210 degrees Fahrenheit before
entering the boilers. The power house is a brick structure 20x40
feet inside, which is neatly ceiled and the interior well finished; the
floor is of concrete, which greatly reduces the risk from fire. The
generator, or dynamo, is a 100 K. W\, of 400 amperes, and is of the
Westinghouse type. The switchboard is of polished granite and is
furnished with Weston's ammeter and volt meter recording instruments,
with safety swith of the most improved pattern. The power
engine is 10x24, and fui-nished wath an automatic governor and cut-off,
and is fed through a Strattons steam separator and run at a speed of
220 revolutions per minute. This is a 250 volt plant and runs five
seven foot mining machines of the chain type, built by Morgan, Gardner
«Sr Co., of Chicago.
Anchor.—On my last examination of this mine, I found the general
condition fair.
Fayette City.—In operation 209 days during the year. Total number
of persons employed 228. A\'hen last visited the ventilation was
fair, but the drainage, in i>arts of the mine, was unsatisfactory.
Amity.—On my last visit there were employed inside 100 miners;
15 drivers and 6 other persons. At outlet the instrument showed a
velocity of 190 and 800 feet respectively. Sectional areas 35 and 48
square feet. The w'orkings are in two parts, namely. Old and New
Hill; in the latter, nine persons were at work. I found the condition
of the New Hill, as regards ventilatidu, ihiI up to the legal requirements.
As a icmedy, they woro di-iving an entry to connect with
another iji the Old Hill; Ihis had yel about fourteen yards to be