Acknowledgments

The Editors of this book wish to express their appreciation to the individuals and organizations who helped in the preparation of this book. Special thanks ¡s due Joseph H. Kraus, Coordinator of the National Science Fair-International, who helped immeasurably with suggestions, correcting proofs, and collecting illustrative material. Winners of the NSF-I who contributed material which could not be used solely for lack of space include: Kenneth Weaver, Miss Joyce Lea Yucker, David C. Hill, David L. Zalk¡nd, Miss Mary F. Anderson, Miss Arv¡e Caughfield, Edward C. Jones, Miss Ava Leavell, Miss Margaret Green, Richard G. Brusch, Jr., Wain L. Settle, Charles T. Womack, John F. Alexander, Miss Sandy Hoger, Baylor Tr¡plett, Karl L. Magleby, and John F. Alexander, Jr. A partial listing of others who helped with material ¡s as follows: Miss Genevieve Peterson of the American Institute; Miss Harriet Gormly and Miss Elizabeth Ann Ghelardi, West-¡nghouse; Dr. Alexander Taffel, Principal of the Bronx High School of Science; Blair Coursen, President, General Biological Supply House, Chicago, III.; William F. Schilling, International Business Machines; Al Murphy, Du Pont; Thomas D. Sinclare, Dow Chemical; Holmes Brown, Henry Still, Martin Marietta Corp.; Eric Berger, Scholastic Magazines; B. M. Schnitz¡us and Fred T. Taraschi, Edmund Scientific Co., Bar-rington, N. J.; Gerald A. Siesfeld, General Electric; Miss Barbara Zerrien, RCA.

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