Chap. 0617 An Act providing for the construction by the department of public works of slips for the berthing of boats in hyannis harbor. Be it enacted, etc., as follows: Subject to the conditions herein imposed, the department of public works is authorized and directed to construct slips for the berthing of boats at the bulkhead, so called, in Hy-annis harbor in the town of Barnstable; provided, that no work shall be begun until the town of Barnstable has paid into the state treasury the sum of thirty-seven hundred and fifty dollars which, together with such sum not exceeding thirty-seven hundred and fifty dollars as may hereafter be appropriated by the general court, shall constitute a fund for the improvements herein authorized. The total cost of such improvements shall not exceed seventy-five hundred dollars; provided, that if any of the aforesaid sum remains after the completion of such improvements, one half shall be repaid to said town. Approved July SO, 1949.