Thursday, Sept. 7     7 p.m., Melrose school: a regular meeting of the School Committee.         Monday, Sept. 11     7   p.m.,   library:   a   regular meeting of the Town Council.         Tuesday, Sept. 12     7   p.m.,   Ft.   Wetherill   fish lab: monthly meeting of the Conservation Commission.       Wednesday, Sept. 13     7 p.m., library: the Harbor Management       Commission meets.