WM. PRESTON LANE, JR., GOVERNOR. 1041

obtained from a central station not under control of such
mine, the phrase shall refer only to^ that part of the sys-
tem which is under control of such mine.

(e) "Entry" means a passage way in a coal bed which
is approximately level and is used for haulage, traveling
way, or ventilation. In a dipping bed, entries on the strike
are known as "levels" or "gangways" and to the dip are
known as "slopes. "

(f) Excavations and workings: The term "excavations
and workings" includes all the excavated portions of a
mine, whether abandoned or being worked; also all under-
ground workings and shafts, tunnels, and other ways and
openings, and all such shafts, slopes, tunnels, and other
openings in the course of being sunk or driven, together
with roads, appliances, machinery and material connected
with the same below the surface.

Faces: The term "face" shall mean the advancing breast
of a mine working-place, either of an entry or room.

(g) "Gas" is used in the sense ordinarily employed by
miners, to mean "fire damp, " and inflammable gas, chiefly
composed of methane, some times accompanied by ethane
(C2H6) in case of leakage of natural gas, and explosives
when mixed with air in certain proportions.

(h) A gassy mine is one in which methane has been
found in such mine or portion thereof by an approved or
permissible flame safety lamp or detector or device or by
air analysis in an amount of 0. 25 percent or more. Once a
mine has been determined to be a gassy mine, it shall
always be so considered. (Whenever used in this Act, the
words "gassy" and "gaseous" shall be considered as being
synonymous. )

(i) "Grounding" means the establishment of an effec-
tive electric connection between. the object grounded and
the earth, whether the object grounded be a machine frame,
a cable armor or an electric system.

(j) "Live" or "Alive" applies to any part of an electric
system, circuit, or apparatus or object in contact with or
adjacent thereto, charged with electricity or generating
voltage to an extent that the difference of potential be-
tween such system, circuit, apparatus or object and the
earth is measurable by a voltmeter; or in case of a static
charge, by an electrostatic voltmeter.

(k) "Methane" is a hydrocarbon gas (CH4) frequently
encountered in coal mines; when it is diffused through air