982 ARTICLE 23

commission. The commission may, from time to time, make changes and
additions in such forms, giving to the persons and corporations three
months' notice before the time fixed by the commission as the expiration
of the fiscal year of any changes or addition which would require any
alteration in the method or form of keeping their accounts for ensuing year.
When any such report is defective, or believed to be erroneous, the com-
mission shall notify the person or corporation making such report to amend
the same within thirty days. Any such person or corporation which shall
neglect to make any such report within the time specified by the commis-
sion, or which shall fail to correct any such report within fifteen days after
notice, shall be liable to a penalty of one hundred dollars and an additional
penalty of ten dollars for each day after the prescribed time for which it
shall neglect to file or correct the same, to be sued for in the name of this
State. The amount recovered in such action shall be paid into the State
treasury and be credited to the general fund. The commission may extend
the time herein limited for cause shown.

Shall have power, either through its members or inspectors or employees
duly authorized by it, to enter in or upon and to inspect the property,
buildings, plants, factories, power-houses and offices of any such corpora-
tions or persons.

Shall have power to examine the books and affairs of any such corpora-
tion or person, and to compel the production before it of books and papers
pertaining to the affairs being investigated by it.

Shall have plenary power to make all valuations of the. lines, property,
plant, franchises and assets of such, corporations.

Cited but not construed in Potomac Ed. Co. v. Pub. Serv. Commn., 165 Md. 472.
See notes to secs. 296, 305 and 344.

An. Code, 1924, sec. 400. 1912, sec. 454. 1910, ch. 180, sec. 40 (p. 386).

411. Every telegraph company or telephone company within the juris-
diction of this commission shall provide such service and facilities as shall
be adequate, just and reasonable. All rates, tolls and charges used, made
or demanded by any such telegraph company or telephone company for any
telegraphic or telephonic communication or service shall be just and reason-
able and not more than allowed by law or by order of the commission and
made as authorized by this sub-title.

No telegraph or telephone company shall make or give any unjust or
undue preference, or advantage in rates charged or demanded, or in any
other respect whatsoever, or subject any particular person, corporation or
locality to any unfair prejudice or disadvantage, but shall furnish equal
facilities to their patrons and transmit all messages in the order in which
they are received.

It shall be the duty of the commission to require that every telephone
company, so far as it operates its lines and conducts its business in the State
of Maryland, to furnish to its patrons reasonably good and adequate service
in all respects. If in the judgment of the commission repairs or improve-
ments to or changes in any telegraph or telephone line, apparatus, machin-
ery, equipment or facilities, or any other property, used by any telegraph
company or telephone company in connection with telegraphic communica-
tion or telephonic communication within the State, ought reasonably to be
made, or any additions or alterations are necessary in order to promote the
security or convenience of the public or employees, or in order to secure
adequate service or facilities for telegraphic or telephonic communications,
the commission shall, after a hearing either on its own motion or after