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

46 2 Eeports of the Inspectors of Mines. [Off. Doc .
ing-s in a healthy condition. No. 2 is also in need of better ventilating-
facilities. The above improvements will be made as soon as arrangements
can be carried out. Quantity of air passing when last measured
in No. 1, 46,500 feet per minute, and 18,000 feet per minute in No. 2.
Black Diamond.—At the time of my last visit there were only a few
men employed taking out pillars. Air in circulation, 4,000 feet per
minute.
Mines on the Chariiers Valley Railroad.
Mansfield No. 2.—The air current in same parts of this mine is heavily
charg"ed with black damp. They are driving- a new airway at the face of
the mine to connect with the face of the main tunnel, which will increase
the area and shorten the distance which the air has to travel. This has
been in progress for several months and will not be completed for several
months to come. It is also the intention to sink an inlet air shaft at the
face of the workings, and the ventilation will not be in a satisfactory condition
until the above improvements are completed. As stated in former
reports the general manager who had charge of this mine for several
years previous to the present manag-ement, is responsible for its present
condition. Oftentimes we find persons in general charge of large mining
properties who are ignorant of the first principles of ventilation or of
the science of mining- in any particular, but they almost invariably leave
to their successors a legacy which will take years to overcome, and
something akin to this state of things has occurred at this mine. Quan-
tity of air in circulation in the working parts of the mine 27,000 feet per
minute.
Nixon.—Was in g-ood order when last visited. Quantity of air passingthrough
the workings, 38,000 feet per minute.
Leasdale is simply a h'ole in the ground without any system. There
is sufficient air at the outlets but no proper airways preserved to conduct
it to the face of the working's where it is most needed. The coal at this
place is nearly all mined out and will only last a short time.
Summer Hill.—They have erected a small fan at this mine during- the
past year and the ventilation is now fully up to the requirements, but
the fan is of limited capacity with very little reserve power. The con-
dition of the mine at the present time is favorable, with a volume of
28,500 feet of air passing through the workings.
Boiver Hill.—The general condition of this mine when last visited was
satisfactory. Volume of air passing- per minute, 30,000 feet.
Bridgeville and Old Boiver Hill Mines.—The ventilation in the dip
side of the Bridgeville mine was not very well distributed, other parts
of mine are in pretty g-ood order. Air passing through the workings,
17,200 feet per minute. The old Bower Hill mine is nearly worked out,
but was in reasonable condition when last visited.
Hastings Sloj^e.—On my first visit the ventilation was very defective