JOHN LEE CARROLL. ESQUIRE, GOVERNOR. 258

operation in the said counties of Alleghany and
Garrett shall make or cause to be made an accurate	Cause map
map or plan of the workings of such mine, which t(	to be made.
shall be kept at the office of the company, lessee or individual so mining, and shall be at all times accessa-
ble to the said inspector for reference only.
SEC. 8. And be it enacted, That the owner, lessee
or agent of every coal mine that may now or here-
after be in operation in the said counties of Alle-
ghany or Garrett, whether worked by slope, shaft or
draft, shall provide and establish within six months	Provide and
from the passage of this act, for every such mine, a	establish.
proper system of pure air ventilation by such modes
as 'are now in use in the coal mines of Alleghany
and Garrett counties, which said ventilation shall be
maintained through every working heading through- out the entire mine, and to expel from said mines	Expel from
the noxious gases or impure air, so that the entire	mines.
mine shall be in a healthful condition for the men
working therein, and free from danger to their lives
by keeping therefrom such impure air or gases.
SEC. 9. And be it enacted, That to secure and pro-	Secure and
vide for the proper ventilation of every coal mine	provide.
in the counties of Alleghany and Garrett, and to
provide for the health and safety of the men em-
ployed therein, the owner, lessee or agent of each
respective mine shall employ a competent and prac-
tical inside overseer, whose duty it shall be to keep	Inside over-
a careful watch over all the ventilating apparatus	seer.
that may be placed in said mine, as well as all the
air-ways, all the traveling-ways, and all the timber-
ings, and to see that all loose coal or rocks overhead	Loose coal
be carefully secured against falling upon any of the	or rocks.
miners engaged at work therein, as they advance in
their excavations ; and it shall be the duty of the	Duty of in-
inside overseer so employed to take charge of and	side overseer.
keep a careful watch over all things connected with
and appertaining to the safety of the men at work
in the mine, and to report to the owner, lessee or
agent of said mine when and where anything under
his charge is unfit for mining purposes ; and it shall
also be the duty of the inside overseer so employed
to take charge of and pay strict attention to all the
air doors used in the ventilation of said mines, and
all air doors used in the ventilation of said mines