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SOURCES OF MATERIALS

Calgon Corp., Pittsburgh, Pa.

DuPont, Wilmington, Del.

Whatman Lab Sales, Hillsboro, Oreg.

Baxter Scientific Products, Irvine, Calif.

Gem-O-Lite Company, Ventura, Calif.

Purafil, Inc., Atlanta, Ga.

Minolta Corp., Ramsey, N. J.

Bausch and Lomb, Woburn, Mass.

Aldrich Chemical Co., Milwaukee, Wis.

British Ceramic Research Associates, Ltd., Stoke-on-Trent, England

VICI Metronics, Santa Clara, Calif.

Monitor Labs, San Diego, Calif.

Perrigot, Arches, France

Gem-O-Lite Company, Ventura, Calif.

Whatman Lab Sales, Hillsboro, Oreg.

AUTHOR INFORMATION

EDWIN L. WILLIAMS II holds an M.S. degree in physical chemistry from the University of California, Los Angeles (1986) and is a research scientist with DGA, Inc. He is involved in research projects including atmospheric chemistry, air pollution measurements, development and application of new analytical methods for the determination of trace levels of air pollutants, museum air quality, and studies of the impact of air pollutants on paper and on artists' colorants. Address: DGA, Inc., 4526 Telephone Rd., Suite 205, Ventura, Calif. 93003.

ERIC GROSJEAN holds a B.A. degree in environmental sciences from the California State University, Northridge (1991) and is a research assistant at DGA, Inc. He is involved in research projects including laboratory studies of atmospheric chemical reactions, air pollution measurements in urban air, indoor air quality, and studies of the impact of air pollutants on artists' colorants. Address: DGA, Inc., 4526 Telephone Rd., Suite 205, Ventura, Calif. 93003.

DANIEL GROSJEAN holds a docteur es sciences degree in physical organic chemistry from the University of Paris (1972) and did postdoctoral research at the Department of Environmental Health Engineering, California Institute of Technology, Pasadena. He is president of DGA, Inc., a private environmental research company that he founded in 1983, and directs research studies in atmospheric chemistry, air pollution measurements, museum air quality, and art conservation. He is a visiting associate, Department of Chemical Engineering, California Institute of Technology, Pasadena. His recent work in the field of art conservation has included several surveys of air quality in museums, the design of mitigation measures such as the use of sorbents to remove air pollutants from display cases, the development of passive samplers for measuring formaldehyde and other pollutants in museum air, and studies of the impact of air pollutants on deacidified paper, artists' colorants, and other materials relevant to museum collections. Address: DGA, Inc., 4526 Telephone Rd., Suite 205, Ventura, Calif. 93003.