Reports of the Inspectors of Mines of the anthracite and bituminous ...

No. 12.] Second Bituminous District. 337
113 cubic feet of air ^oiiig- iu at the inlet per minute. The distribution
of this volume is well looked after, and the air is circulated to the face
of the working's, both these shafts are connected and are lig-hted with
locked safety lamps. Mining- boss, John Whitfield.
No. S Mine.—The slope bottom has been timbered with 10" X 12"
posts and 12"xl4" collars which make a very neat job. The averag-e
vuantity of air g-oing- in at the inlet per minute was 76,630 cubic feet.
This volume is well divided and circulated throug-hout all the mine.
This quantity g-ives each person employed in the mine 539 cubic feet
per minute, and it is not any too much, althoug-h "fire-damp " has never
been seen in the mine, but there is plenty of " black-damp "" carbonic
acid" g-as. Mining--boss, James Yardley.
No. 3 Shaft.—Two shafts have been sunk at this mine within the year,
an air and a pumping- shaft. A 20' diameter fan was erected on top of
the air shaft to force air into Nos. 3 and 4 mines. Size of eng-ine cylin-
der 16"x32", the eng-ine is attached directly to the fan. On my last
visit I measured at the inlet 58,400 cubic feet g^oing- in per minute. This
volume was fairly distributed and circulated throug'hout the mine. The
mine is lig-hted altog:ether with the locked safety lamp. Mining--boss,
Luther Flesher.
No. Jf. Mine.—There have been many important improvements made
inside and outside the mine this year. A brick eng-ine house, a new eng-ine,
new boilers, and a new haulag-e plant have been erected. A com-
plete chang-e has been made at the mine. The 20' diameter fan that
ventilates No. 3 mine ventilates this mine also. On my last visit I measured
28,800 cubic feet of air going- in at the inlet per minute. This
quantity was divided into two parts and fairly distributed throughout
the mine. Mining--boss, Robert Morris.
Standard No. 2 Shaft.
An electric plant has been erected at this mine. One 10 "Xl2" hig-h
speed eng-ine, one Westing-house dynamo of 100 lamps, 16 candle power
capacity. Twenty-seven of these lig-hts are used to lig-ht the building-s
on the surface, and 41 are used underg-round, distributed as follows: 10
at the shaft bottom, 4 in the manway, 7 in the pump house, 2 at the oil-
ing- station, 1 at the horseway, 3 in the haulag-e eng-ine house, 2 at the
haulage siding switches, 1 in the shoeing- shop and 7 in each of the tw^o
stables. These difiereut lights are g-raded from 16 to 50 candle power,
depending on the light required at the various stations. I have seen the
plant in oi^eratiou, it gives perfect satisfaction and there is no trouble
in seeing- a pin on the floor of the mine, and the cost of running the plant
will not exceed the carbon oil lamp, and is much safer. The mine is
kept in very good condition with an average of 53,320 cubic feet of air
in circulation per minute. They have driven three additional air courses
to the No. 1 shaft. This shortens the distance and by so doing it reduces
22-12-:)l.