ACKNOWLEDGMENTS

The editor gratefully acknowledges the assistance of a wise and generous colleague, Ralph J. Gray. All of the photomicrographs in the metallurgical coke, petroleum coke, and quinoline insolubles sections and most of the photomicrographs in the graphite section are from his extensive personal collection built up over a lifetime of research on these materials. In addition to providing the photomicrographs, he also collaborated in assembling the atlas and the descriptions. Without him this atlas would not have been possible. The photomicrographs for the combustion char plate were produced in the Coal Characterization Laboratory with the excellent collaboration of William W. Huggett. His efforts are also gratefully acknowledged.

Some samples and information were provided by Mr. Albert Tamashausky of Asbury Graphite Mills Inc., Professor Harry Marsh formerly of the University of Newcastle-upon-Tyne, and Dr. Gareth B. Neighbour of the University of Bath. These kind donations are very much appreciated.

The editor is also grateful for the financial support of the Coal Research Center, the Department of Geology at Southern Illinois University, and The Society for Organic Petrology. The support and encouragement of John Mead, the Director of the Coal Research Center, is also greatly appreciated.

The atlas web site was designed and produced by Professor Susan Logue with the help of her staff at the Instructional Support Services Department of Morris Library at Southern Illinois University at Carbondale and Mr. Russell E. Thomas of the Geology Department. Their patience, dedication, and skill are happily acknowledged by the editor.