INSTRUMENTATION der Contract No. DE-AC02-76CH00016. The Na tional Institutes of Health, Division of Research Resources, supports use of the X-Ray Microscopy Facility for biomedical experiments under Grant No. P41RR01838. The National Science Founda tion supports use of the X-Ray Microscopy Facili ty for measurements on geological problems under Grant No. EAR-8618346. The National Aeronau tics and Space Administration supports use of the X-Ray Microscopy Facility for measurements on extraterrestrial materials under Grant No. NAG9-106. We thank our colleagues, A. L. Hanson, J. B. Hastings, L. Grodzins, J. G. Pounds, M. L. Rivers, J. V. Smith, S. R. Sutton, A. C. Thompson, R. D. Giauque, J. H. Underwood, and P. Spanne, for many helpful discussions and the use of unpub lished data as examples for this article. Their con tributions have been essential in developing the X-ray microscopy project at the Brookhaven NSLS X-26 beam line. For information on the use of the NSLS labora tory, contact Susan White-DePace, NSLS, Build ing 725B, Brookhaven National Laboratory, Up ton, NY 11973; (516) 282-7114. For user informa tion at the CHESS laboratory, contact Penny Ellison, CHESS, Wilson Laboratory, Cornell Uni versity, Ithaca, NY 14853; (607) 255-7163. Contact Katherine Cantwell, User Research Administra tion, SSRL, P.O. Box 4349, Bin 69, Stanford, CA 94305; (415) 854-3300, ext. 2874, for information about the SRRL.
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356 A · ANALYTICAL CHEMISTRY, VOL. 61, NO. 5, MARCH 1, 1989
