1. Quality Assessment Research Unit, Richard B. Russell Research Center, Agricultural Research Service, U.S. Department of Agriculture, P.O. Box 5677, Athens, Georgia 30605-5677; Hewlett-Packard Company, MS711A, 1000 N.E. Circle Boulevard, Corvallis, Oregon 97330; and Cotton Quality Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Clemson, South Carolina 29631