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The edited papers NATURAL STONE AND CLAY PRODUCTS and discussions of a research correlation conference on natural stone and c1lay products conducted by the Building Research Institute in Washington, D. C on September 19 and 20' 1956. NATIONAL RESEARCH COUNCIL . WASHINGTON, D. C. . PUBLICATION 466
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ACKNOWLEDGM ENTS The Modern Masonry Conference was organized and conducted by tl~e Building Research Institute of the National Academy of Sciences-National Research Council: It was sponsored by the Allied Masonry Council. an alliance of major producers, contractors, and labor forces in the masonry industry. Industry groups contributing to this conference through the Allied Masonry Council were the Structural Clay Products Institute, the Marble Institute of America, the Indiana Limestone Institute, the Building Stone Institute, the Mason Contractors Association of America, and the Bricklayers, Masons. and Plasterers International Union of America. The Building Research Institute wishes to express its appreciation to the speakers and session chairmen of the conference on Modern Masonry: Natural Stone and Clay Products, for their fine cooperation during the course of the program and for the high technical level of the material presented. Mr. C. E. Silling of C. E. Silling & Associates is especially thanked for his work as general chairman of the conference. For their help in obtaining speakers and session chairmen and in refining the areas to be covered by the conference, thanks is due to the members of the Program Committee who are: Robert R. Denny, Public Relations Director Allied Masonry Council Joseph P. Moore, Public Relations Director Marble Institute of America and the Building Stone Institute Charles Penn, Vice President Indiana Limestone Corporation Harry C. Plummer, Director, Ellgineeri~g and Technology Structural Clay Products Institute W. A. Snow, Manager, Building Division Associated General Contractors of America James F. Steiner, Manager Construction and Civic Development Department Chamber of Commerce of the United States Walter A. Taylor, Director Department of Education and Research American Institute of Architects Inquiries concerning this book or the Modern Masonry Conference may be addressed to the Building Research Institute, Division of Engi- neering and Industrial Research, National Academy of Scierlces-National Research Council. 2101 Constitution Avenue, Washington 2;. D. C. Library of Congress Card Catalogue Number: '6-60081 Price: $4.50