22 April 1988
Vol 240, Issue 4851

About The Cover

The singular properties of the core region and the rotation center of the spiral wave in the Belousov-Zhabotinsky reaction are shown in three-dimensional perspective. The image was obtained by an overlay of a large number of single snapshots of spiral rotation covering three full revolutions. It presents the upper envelope of the concentration variation, that is the maximum level of oxidation of the catalyst ferroin reached at each point in space. The envelope is shown in arbitrary pseudo colors. See page 460. [S. C. M&uumlaut;ller, Th. Plesser, and B. Hess, Max-Planck-Institut f&uumlaut;r Ern&aumlaut;hrungsphysiologie, D-4600 Dortmund, Federal Republic of Germany]