3(Carroll Development Co.)4(Dynatech Corporation)5(National Gypsum Co.)6(Potomac Rubber Co.)7(Stanwood Homes)8(Vermiculite Production Corp.)9(Vermiculite Research Institute)10Aerocrete Corp.11Agasote Millboard Co.12Air-O-Therm Application Co.13Allied Chemical Corp., Barrett Division14American Gilsonite Co.15American Rock Wool Corp.16Apache Co.17Armco Int'l Corp.18Armstrong Cork Co.19Armstrong Cork Co. (Servel, Inc.)20Arthur D. Little, Inc.21Asbestos Products Company22Atlantic Perlite Co.23Atlas Chemical Industries, Inc.24B.F. Goodrich25Baldwin Hill Co.26Baltimore Lumber Company27Basalt Rock Co.28Bendix Corporation29Bird & Sons30Bird Archer Co.31Brazil32Bristol Insulation Company33Brudericks34C.W. Poe Company35Cannon Brick Co.36Cape Building Products (Mr. E. LaJoie, Agent)37Capitol Rock Wool Co.38Carborundum Co.39Cary Insulation Co.40Celotex Co.41Certainteed Products, Inc.42Columbia Acoustics & Fire Proofing Co.43Connecticut Hard Rubber Co. (Potomac Rubber Co.)44Container Corporation of America45Continental-Diamond Fiber Corp.46Corning Glass Works47Crossfield Products48Daniel Duskis, Inc.49Dow Chemical Co.50Dow Chemical Co. (?)51Dow Corning Corp.52Dow Corning Corp. (Green Rubber Co.)53Dura-Tech Corporation54Durisol, Inc.55E.I. du Pont de Nemours & Co.56E.I. du Pont de Nemours & Co. (DuPont Rayon Co.)57Eagle-Picher Co.58F.E. Schundler & Co.59Ferguson(?)60Fire Brick Co.61Fir-Tex Insulating Board Co.62Flintkote Co.63Flintkote Co. (Hawiian Cane Products, Inc.)64Fogel Refrig. Co.65Formica Insulation Co.66Forty-Eight Insulations, Inc.67Frosted Foods Insulation68Gaylord Container Corp.69Gem Mfg. Co.70General Electric Company71Gilman Brothers Co.72Glidden73Goodyear Tire & Rubber Co.74Grasas Vegetales Cubanas75Great American Industries, Inc.76Great American Industries, Inc., Rubatex Division77Great Lakes Carbon Corp.78Grefco, Inc.79Grumman Aircraft80Gustin-Bacon Mfg. Co.81Halowax Corp.82Industrial Products, Inc.83Industrials, Inc.84Insulation Industries, Inc.85Insulite Co.86Insul-Wool Insulation Corp.87Janesville Cotton Mill88Jetbestos Inc.89Jiffy Mfg. Co.90John G. Shelby Co., Inc.91Johns Manville92Kaiser Gypsum Company, Inc.93Keasby and Mattison Co.94Kimberly Clark Corp.95Larsen Products Corp.96Lockport Cotton Batting Co.97Maizewood Insulation Co.98Marine Insulating Corporation99Masonite Corp.100Masonite Corp., Vermiculite Product Division101McDonnell-Douglas Corporation102Minnesota and Ontario Paper Co., Insulite Division103Monsanto Chemical Co.104Mr. S. Gray105Munn and Steele, Inc.106Munn and Steele, Inc. (J.G. Roys & Sons)107NASA108Natick Laboratories109National Beryllia Corporation110National Cellulose Corp.111National Gypsum Co.112NBS113NBS, Chemistry Division114NBS, Leather Section115NBS, R. Valore116NBS, Rubber Section117NOPCO Chemical Co.118North Dakota Research Foundation119Ottawa-Silica Co.120Owens Corning Fiberglas Corp.121Owens Corning Fiberglas Corp. (?)122Owens-Illinois Glass Company, Kaylo Division123Pal-O-Pak Insulation Co. (National Cooperatives, Inc.)124Philip Carey Mfg. Co.125Philip Carey Mfg. Co. (Association of American Railroads)126Philips Research Laboratory GmbH127Pioneer-Flintkote128Pittsburgh Corning Corp.129Pittsburgh Corning Corp. (?)130Plant Rubber & Asbestos Works131Planter Peanut Co.132Plasbestos Company of America133Plastergon Wallboard Co.134QMREL, Natick, Massachusetts135Raybestos-Manhatten, Inc.136Reed Paint Co.137Reinsulate Co.138Riverton Lime and Stone Co.139Roanoke Rock Wool Co., Inc.140Rock Fleece Corp.141Rock Wool Mfg. Co.142Rohm & Haas Co.143Ruberoid Co.144S.E. Dockstadex145Sandia Corporation146Seaman Paper Co.147Sears Roebuck148Silbrico Corporation149Silicair Co.150Southern Mineralite Company151Southern Research Institute152Sponge Rubber Products Co.153Sprayed Insulation, Inc.154Strawick Corporation155Therminsul Corp.156Tuco Products Corp.157U.S. Army Engineer R&D Laboratory158U.S. Department of Agriculture159U.S. Gypsum Co.160U.S. Industrial Chemical Co.161U.S. Insulation Sales Corp.162U.S. Maritime Commission163U.S. Naval Ordnance Laboratory164U.S. Rockboard Corp.165U.S. Rubber Co.166Union Asbestos & Rubber Co. (Pittsburgh Corning Corp.)167Union Carbide Chemicals Co.168Union Fiber Co.169Union Rock Wool Co.170Uniroyal171United Materials Co.172United Refrig. Mfg. Co.173University of Florida174Upjohn Co., CPR Division175Waldort Paper Prod. Co.176Waterproof Insulation Corp.177Western Insulfoam Co.178Westinghouse Electric Corp.179Westinghouse Electric Corp. (Bakelite Co.)180Weston181Weyerhaeuser Co.182Wood Conversion Co.183Zonolite Co.184Zonolite Co. (Vermiculite Production Corp.)