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

No. 10. SIXTH BITUMINOUS DISTRICT. 377
Iiupio\cm('iils ]Made During- the Year 1807.
The following mines have put in improvements during the past
year: "Stineman/' a new rope haulage; "Puritan No. 1," electric min
ing machines; "(JaliTzin shaft," a new rope haulage; ^'Gallitzin slope,"
electric motors for hauling, and electric mining machines; "Columbia,"
a rope liaulagc plant and a Stine fan; "Flanigan Run," a fan to re-
I»lace a fuinace; "Sterling No. S," mining machines; "Juniata," an
electric plant to run mining nuichines; "Sterling No. 11," a com-
])i-essed air jdant to lun mining machines; "Lancashire No. 7," an
(dcctric jdant foi- hauling and ihining coal; ">\'(^st liranch," a compressed
ail* [dant fro)n whicli the mining machini'S riM-cnve ])()wer;
"Empire," a comi»ress(^d air ])lant from which power is obtained to
run the macdiinc punches ^^'hich an* used to nune coal; "Lorain," a
compressed air i)lant to run the mining machines. For "Rolling
JMill," mine, the Cambi'ia Lon Comjtanv have contracted for and have
starttd to erect a very large compressed air plant, from which suflScient
i»ower will be obtained to run live air locomotives and a sufHcient
nund)er of machines to mine from twelve to fifteen hundred
tons of coal per day.
Notes and Comments on the State of Mining in
the District.
A list of improvements introduced at the mines in the way of
machinery for hauling and nnning is given above. Here I desire
to note other improvements quietly being made at a very large
number of the collieiies, which are of more importance to mining
men than the putting in of machinery. I refer to changes that are
taking place in the system of mining by the adoption of larger pillars,
wider headings or hauling I'oads, the conducting of water through
back headings not used for hauling purposes, etc.
It is clear thart the three principal points to be aimed at in a system
of mining are: First, ecommiical methods; second, a i)lan by which
the greatest number of tons of marketable coal per acre can be
mined; third, a system which will insure safety and good sanitary
conditions in the mine. Tiie methods of mining now being ado])ted,
which I have alluded to above, will cover these points. I-t needs no
argument to convince Ji man who has pass