H E AC S SYMPOSIU M SERIES was founded in 1974 to provide
a medium for publishing symposia quickly in book form. The
format of the Series parallels that of the continuing ADVANCE S
I N CHEMISTR Y SERIES except that, in order to save time, the
papers are not typeset, but are reproduced as they are submit￾ted by the authors in camera-ready form. Papers are reviewed
under the supervision of the editors with the assistance of the
Advisory Board and are selected to maintain the integrity of the
symposia. Both reviews and reports of research are acceptable,
because symposia may embrace both types of presentation.
However, verbatim reproductions of previously published
papers are not accepted.