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AUTHOR INFORMATION

CARLOS RODRIGUEZ-NAVARRO received his B.A. in geology and his M.S. in science and technology in the conservation and restoration of the cultural heritage from the University of Granada, Spain. In 1995, after receiving his Ph.D. in geology from the University of Granada, he accepted a postdoctoral research fellow position at the Getty Conservation Institute. He is currently working on research projects that deal with the mechanism of stone decay and conservation methodologies. The main topics of his present research are the role of salt and minor components (clays) in the alteration of building and sculptural materials and the testing and development of potential treatments for these problems. Address: Getty Conservation Institute, 1200 Getty Center Dr., Ste. 700, Los Angeles, Calif. 90049

ERIC F. HANSEN is a Fellow of AIC who received his M.S. in organic synthesis from the University of California, Irvine, and is a C. Phil. in the Archaeology Studies Program of the University of California, Los Angeles. He is currently an associate scientist at the Getty Conservation Institute, where he has been employed since 1985. His research interests include the consolidation of fragile painted objects, the deterioration of organic materials (including synthetic and natural substances), the effects of treatment parameters on the final physical properties of objects, the technological styles in the production of architectural sculpture of the ancient Maya, and the decay of ornamental porous calcareous materials. Address: as for Rodriguez-Navarro.

EDUARDO SEBASTIAN received his Ph.D. in geology from the University of Granada, Spain. He is currently an associate professor in the Department of Mineralogy and Petrology, University of Granada, and coordinator of the research group on stone conservation. His expertise includes clay mineralogy analysis, stone decay evaluation, nondestructive techniques for in situ stone decay diagnosis, conservation and analysis of lime mortar and plasters, and consolidation of natural stone, plasters, and mortars, as well as stabilization of earthen architecture. Address: Departamento de Mineraloga y Petrologa, Universidad de Granada, Fuente Nueva s/n, 18002 Granada, Spain.

WILLIAM S. GINELL received his Ph.D. in physical chemistry from the University of Wisconsin in 1949. Since then, he has held research positions at Brookhaven National Laboratory, Atomics International, Aerospace Corporation, and McDonnell Douglas Astronautics Company. He joined the Getty Conservation Institute in 1984 as head of materials science and is currently head of monuments and sites conservation research. His principal research interests are conservation in humid, tropical environments, stone and earthen materials conservation, seismic stabilization of historic structures, and architectural conservation. Address: as for Rodriguez-Navarro.