Cover illustration

October 4, 2005; 102 (40)
Cover image expansion

Cover image: Grandjean texture of a 2-μm-thick cell of W376 in the giant-block twist grain boundary smectic C phase, showing areas of δ = 60° and 90° periodicity. This polarized light micrograph shows distinct areas of different block number exhibiting square and nearly hexagonal lattices. See the article by Fernsler et al. on pages 14191–14196. Image courtesy of R.-F. Shao and N. A. Clark.