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

No. 12.1 Third Bituminous District. 363
year. The quantity of air measured at furnace was 17,200 cubic feet per
minute but owing to so many old working's being: left open, thereby allowing-
larg-e quantities of carbonic acid g-as to escape, the atmosphere
of the mine was not very pure although there is usually a fair current of
air moving- in the main passag-e thereof.
Stoneboro No. 3 is a comparatively new mine and the ventilation is
very fair. I measured at last visit about 11,000 cubic feet of air circu-
lating- throughout the main portions of the mine. The drainag-e is fair
when the pumps are in working- order.
Carver mine is in g-ood condition. I measured 15,000 cubic feet of air
at inlet which was distributed fairly well to face of headings. The
drainage was reasonably good.
At Ormsby slope there are not many miners employed. I measured
about 10,800 cubic feet of air in circulation which afforded ample ventilation.
Some of the roads of the mine are wet and muddy.
At Shenango shaft 14,800 cubic feet of air was measured which was
being conducted to the face of the works which gave good air to the
seventy miners employed in the mine. The mine is wet but drainage
reasonably good.
Lackawannock shaft was in splendid condition both as regards ven-
tilation and drainage.
3Iines Located in Beaver and Laivrence Counties.
There are nine mines situated in these two counties.
Beaver Falls mine was not in operation during either of the two visits
I made to it but I examined the mine and found it in reasonably good
condition.
At Baker mine there was a volume of air in motion of 8,500 cubic feet,
6,250 feet of which was fairly distributed to the face of the works. I
found one of the entry roads wet and muddy but the other parts of the
mine were very well drained.
In Sterling mine I measured 13,360 cubic feet of air in circulation well
conducted to face of headings. General condition of mine was good.
Connelton mine is a small operation, and the company is just mining
out blocks of coal that were left in an old abandoned mine. Owing to
the honey-combed condition of the old works it is a very difficult matter
to get the air current up to where the miners are working, however, a
fair volume of air is maintained in the workings of the mine.
Beaver mine was in good condition, both as regards ventilation and
drainage ; when last examined there was 14,000 cubic feet of air in circu-
lation near face of works which was being produced by a fan eight feet
in diameter instead of the old six-foot furnace.
At Clinton mine the old workings thereof were fairly ventilated but the
workings in the new opening were defective in this respect, but I have
been informed since my visit that this defect has been remedied.