ART. 10.] CAMBRIDGE. 1)97

Class D shall be due and redeemable in twenty years from the
date of issue; class C shall be due and redeemable after fifteen
years; class B shall be due and redeemable after ten years; class
A shall be due and redeemable after five years; the said commis-
sioners shall pay the interest as aforesaid on said bonds ont of the
annual taxes levied for corporate purposes, and shall likewise annu-
ally set apart therefrom the sum of two hundred dollars, to be in-
vested in a sinking fund to liquidate said bonded loan at maturity;
and they shall invest said sum authorized to be set apart as a sink-
ing fund, annually, in the manner provided in section 82, and shall
be subject likewise to the penalties mentioned in said section; the
money arising from the sale of said bonds shall be expended by
said commissioners of Cambridge in securing an ample supply of
water for all town purposes, either by subscription to the capital
stock of some company hereafter to be organized, or for sinking
artesian or surface wells or tanks, or in such other manner as the
commissioners may deem best to secure a water supply in said
town. The commissioners of Cambridge are authorized and
directed to levy annually upon the taxable property of Cambridge,
as soon as water works are contracted for to supply the said town
with water, a tax, in addition to those already allowed by law, of
five cents on the one hundred dollars, and the money arising from
said tax shall be set apart and especially dedicated for the purpose
of furnishing the corporation of Cambridge with water to be sup-
plied by water works that shall hereafter be erected.

1878, ch. 70.

84. It shall not be lawful to build or erect any wharf, pier,
improvement, or any structure of any kind, in Cambridge creek
or its branches, or extend the same from either shore, or to extend
any wharf, pier, or other improvement, already existing beyond
or outside the building-line established by the report of the com-
missioners appointed under the act of 1878, chapter 70; and every
person offending against the provisions of this section shall be
deemed guilty of a public nuisance, and on indictment and con-
viction in said court shall be fined a sum equal to the cost of
removing said nuisance, and shall be confined in the county jail
until the said fine and costs are paid ; and to enable the court to
determine the amount of the said fine, they shall at the time of