Transmitting a bill authorizing the revision of lines and grades on a portion of City Plan No. 307 by striking from the City Plan and vacating certain sub-surface portions of Market Street east of Ninth Street, Tenth Street between Market Street and Filbert Street, and Eleventh Street between Market Street and Filbert Street, and by striking from said City Plan and vacating certain aerial portions of Ninth Street between Market Street and Filbert Street and Tenth Street between Market Street and Filbert Street; and authorizing the conveyance of such struck and vacated areas, together with certain areas previously struck and vacated; all under certain terms and conditions.