David H. Freedman's Research News article "Drawing a bead on superdense data storage" (6 Mar. 1992, p. 1213) incorrectly implied that Stephen Arnold, at Polytechnic University in Brooklyn, New York, was the first to detect ultra-narrow resonances in microparticles. That discovery was made by Arthur Ashkin at Bell Laboratories. Arnold's work was also inspired, in part, by work on excitation spectroscopy of fluorescent fibers by Richard Chang and his group at Yale University.
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