268 COEPOEATIONS. [ART. 23

transmitting electricity for light, heat or power, or maintaining under-
ground conduits or ducts for electrical conductors.

Investigate and ascertain, from time to time, the quality of gas sup-
plied by persons and corporations, examine the methods employed by
such persons and corporations, in manufacturing, selling, delivering
or supplying gas or electricity for light, heat or power, and in trans-
mitting the same, and have power to order such improvements as will
best promote the public interests, preserve the public health and pro-
tect those using such gas or electricity and those employed in the manu-
facture and distribution thereof, or in the maintenance and operation
of the works, wires, poles, lines, conduits, ducts and systems in con-
nection therewith.

Have power by order, to fix from time to time such reasonable stand-
ards as it may deem proper for the measurement of the purity of gas,
and of the illuminating power of gas, and of the heating power of gas,
for lighting, heating, or power purposes, whether natural gas distrib-
uted or sold, or gas manufactured, distributed, or sold by persons or
gas corporations for such lighting, heating, or powen purposes, and to
prescribe from time to time the efficiency of the electric supply system,
of the current supplied, and of the lamps furnished by the persons or
electrical corporations generating and selling electric current, and by
order to require said natural or other gas to equal the standards so
fixed by it, and to prescribe from time to time the reasonable minimum
and maximum pressure at which said natural or other gas shall be
delivered by said persons or gas corporations.

For the purpose of determining whether said natural or other gas
for lighting, heating or power purposes conforms to said standards of
illuminating power, heating power, purity and pressure, and for the
purpose of determining whether the efficiency of the electric supply
system and the current supplied and the lamps furnished conforms
with the orders issued by the Commission, the Commission shall have
power of its own motion to examine and investigate the plants and
methods employed in manufacturing, distributing, delivering and sup-
plying said natural or other gas or electricity, and shall have access
through its members or persons employed and authorized by it to make
such examinations and investigations, to all parts of the manufacturing
or other plants so owned, used or operated for the manufacture, trans-
mission, distribution or delivery of said natural or other gas or elec-
tricity by any such person, gas or electrical corporation. Any employee
or agent of the Commission who divulges any fact or information
which may come to his knowledge during the course of any such inspec-
tion or examination, except in so far as he may be directed by the
Commission or by a court or judge thereof or authorized by law, shall
be guilty of a misdemeanor.

Have full and plenary power to value, the plant, property, appurte-
nances, assets and franchises of such persons or corporations.