13 December 1991
Vol 254, Issue 5038

About The Cover

Magnetic domains in a ferromagnetic garnet film as seen in a polarizing microscope. Up and down domains form a labyrinth of dark and light stripes (11 micrometers wide). Digital pattern analysis identifies clusters of straight-line segments as a fundamental structural motif. Each cluster is color-coded according to orientation of its line segments. See page 1616. [Image by M. Seul, R. Wolfe, L. R. Monar, and L. O'Gorman, AT&T Bell Laboratories]