Contents

31 October 1997
Vol 278, Issue 5339

About The Cover

The invitation to the first meeting of what was then planned to be the American Association for the Promotion of Science. Independence Hall is pictured in the background. AAAS will open its 150th Anniversary year celebration with the Annual Meeting in Philadelphia, where the association was founded on 20 September 1848 at the Academy of Natural Sciences. See 1988 AAAS Annual Meeting for the many special activities and speakers that will be a part of the 1998 opening. [Photo of Independence Hall: Photodisc, Incorporated. Collage: C. Faber Smith]