Meridian Singers, directed by Michael   Barrett, an a cappella chorus open to all in the MIT community, is seeking new members.  Come sing with us as we prepare for our winter concert, which will feature part songs and folksongs, including music by composers including Schumann, Holst, Sullivan, and Isaac. Rehearsals: Noon to 1 pm, Tuesdays, in building 13, beginning 9/11.  Prospective singers should contact our conductor: mbarrett@post.harvard.edu