133 A.2d 501 SHELL OIL COMPANY v. MANCHESTER. No. 4576.Supreme Court of New Hampshire Hillsborough.Argued May 7, 1957. Decided June 20, 1957. 1. The provisions of a zoning ordinance of a city granting to the board of adjustment in addition to its general statutory powers (RSA 31:66) authority to “permit a garage, filling station . […]