1374 LICENSES. [ART. 56

the maker thereof; (3) the number of cylinders and diameter of the
bore of the cylinder stated in inches, and (4) such, other information
as shall be required by said commmissioner. The horsepower of all
motor vehicles propelled by gas engines, except motorcycles, shall be
computed and recorded upon the following formula, and the annual
license fee hereinafter provided for, paid in accordance therewith:
Square the diameter of the cylinder, multiply by the number of cylin-
ders and divide by two and one-half. For all motor vehicles propelled
by a steam engine the rating shall be based on the system of rating
adopted by the United States Government. Should any other motor
power be used, the commissioner of motor vehicles is empowered to
adopt such formula to govern their rating as he may deem proper. The
said commissioner of motor vehicles, upon payment of the registration
fee hereinafter provided for, shall file such application in his office and
register such motor vehicle, assigning to it a distinguishing number or
mark, and shall thereupon issue to the owner thereof a certificate of
registration, which shall.contain the name, place of residence and post-
office address of the owner, and the number or mark assigned to such
motor vehicle. Such certificate shall be in convenient form and shall
at all times be carried upon such motor vehicle, and shall be subject to
examination upon demand by any proper officer. Said commissioner
shall also, without expense to the applicant, issue and deliver to such
owner two duplicate metal plates or markers bearing the letters "Md."
and the number or mark assigned to such motor vehicle as aforesaid,
the figures thereon to be not less than five inches high, and each stroke
to be not less than one-half inch in width. Such plates or markers shall
be of a distinctly different color or shade each year, to be designated
and selected by the commissioner of motor vehicles, and there shall be
at all times a marked contrast, between the color of the number plates
and that of the numerals or letters thereon. In the case of motor-
cycles one number plate or marker shall be furnished, the letters and
figures thereon to be at least one inch high and one-eighth of an inch
in width. The certificate provided for in this section and the right
to use the number plate or marker aforesaid shall expire at midnight
on December thirty-first of each and every year.

As to bicycle sidepath licenses, see art. 91, sec. 86, et seq.

1910, ch. 207, sec. 134 (p. 172).

136. The commissioner of motor vehicles shall keep a record of
all statements filed with him and all certificates issued by him, which
record shall be open to public inspection. Upon the transfer of owner-
ship of any motor vehicle, its certificate of registration and the right to
use the number plates or markers aforesaid, shall expire, and upon
surrender to said commissioner of such certificate and number plates,
he shall refund for the remaining months in the year the proportion-
able part of the fee for the registration of .such motor vehicle for the
entire year, the amount so refunded to be computed as to entire months
and no fraction of months, and said commissioner may, at his discretion;