1872 LAWS OF MARYLAND. [CH. 762

boilers, kettles, smoke stacks, and stove pipes in said District,
and the storage of gasoline and other combustibles or ex-
plosives therein; to provide for and regulate the safe construc-
tion, inspection, and repair of all private and public buildings
within said District; to regulate, restrain, or prohibit the erec-
tion of wooden or frame buildings within the present limits of
said District or any thickly populated portion of the same and
to remove the same at the owner's expense, when erected or
suffered to remain contrary to law or such regulations as it
may adopt; to regulate the height, construction, and inspec-
tion of all new buildings hereafter erected in said District; to
regulate the limits within which it shall be lawful to erect
steps, porticoes, bay windows, or other structural ornaments
to houses fronting on any of the highways, streets, avenues,
lanes, or alleys of said District; to regulate the materials used
and the manner of installing any and all systems of electric
wiring, piping, conduit laying in any building, and to regulate
the location, manner of installation, size, and area per lot of
all advertising structures and to restrict the projection of
same over public property, and generally to adopt and en-
force, for the whole of said District or for thickly populated
portions thereof, all necessary regulations or rules for the
foregoing purposes, and to prescribe fines and penalties,
for violations thereof; provided, however, that no such
rules and regulations so adopted by said Commission as
aforesaid shall be deemed valid or effective until the same shall
have been formally adopted by the said Commission at a
regular meeting, and recorded in a book kept in its office for
the purpose, and until said rules and regulations shall have
been published at least three times in two newspapers
of general circulation in that portion of the District
to which the regulations apply. It shall be the duty
of the Commission to cause said rules and regulations
adopted by it as aforesaid to be so recorded in a book
or books kept by it for that purpose in its office and
to be published at least three times in two papers pub-
lished in the said portion of the District; and when so
recorded and published all persons shall be deemed and taken
to have notice thereof, and no actual notice need be proven.
And it shall further be the duty of the said Commission to
cause to be printed for general distribution a sufficient number
of copies of said rules and regulations when so adopted, re-
corded, and published as aforesaid, and said printed copy of
such regulations shall be deemed prima facie evidence of such
rules and regulations whenever it may be necessary to prove
the existence of the same in any judicial proceedings. The
rules and regulations now in force in the respective por-
tions of the District within Montgomery and Prince