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เนื้อหาย่อ : W E WISH to express our ap- Chicago Belting Co.. Chicago, Ill. preciation to the many persons and Chicago Wheel and Mfg. Co. Chicago, TII. hrms whose splendid cooperation has The Cincinnati Tool Co., Cincinnati, Ohio. made this study possible. Clarke Sunding Machine Co., Muskegon, We particularly thank the follow- Mich. Cleveland Twist Drill Co., Cleveland, Ohio. manufacturers of woodworking Clover Mfg. Co. , Norwalk, Comn. related equipment who supplied Consolidated Machinery and Supply Co.. booklets, bulletins, catalogs, mainte- Couch and Heyle, Peoria, Ill. Los Angeles, Calif. drawings: leaflets, special photographs, Curtis Mfg. Co., Curtis Saw Div.. St. Lonis. Mo. Delta File Works, Philadelphia, Pa. B. Manufacturing Company, Worcester, De Cristoforo, R. J., Power Tool Wood- Massachusetts. working for C. Atkins and Co.. Indianapolis, Ind. Exs Press Co.KalamooMich Graw-Hill Book Co., Inc. New York. Chapter 9, Me- Dependable Machine Company, Ine., Aeerican Saw Bettstown, Mill Machinery Co.. Hac- . N. J. De Walt, Ine., Greensboro, North Carolina. , Lancaster, Pa. Amestrong Manufacturing Co. Purtland, The G. M. Diehl Machine Works, Ine. Wabash, Ind. Oregon. Bater D. Whitney and Son, Winchester, *Henry Disston and Sons. Inc., Philadel- Massachusetts. phia, Pa. State Abrasive Products, Westboro, The DoAn Co. Des Plaines. Ill. Mass. Ekstrom, Carlson and Co. Rockford, Ill. Manufacturing Company, Ingle- The Fafnir Bearing Co.. New Britain, Co. wood, California. Fate-Root-Heath Co. ).. Plymouth, Ohio. Bedr-Manning Corporation, Division of J. A. Fay and Egan Co. Cincinnati, Ohio. Norton Company, y, Troy, New York. Bell Machine Co., Oshkosh, Wis. The Federal Bearings Co.. Inc., Pough- keepsie, N. Y. Belsaw Machinery Company, Kansas City, Firth Sterling Steel and Carbide Corp.. McKeesport, Pa. Black Bros. Co., Inc., Mendota, Ill. "Foley Manufacturing Co. Minncapolis, Black and Decker Mfg. Co., Towson, Minn. Md. Gallmeyer and Livingston Company, Grand "Beice-Cranc Co., Toledo, Ohio. Michigan. Machine Works, Holland, Mich. Rapids, The Gates Rubber Co. Denver, Colo. dfomia Saw Works, San Francisco, Calif. *General Electric Co.. Gaborundum Co., Niagara Falls, N. Y. Graton and Knight. Worcester, Mass. Schenectady, N. Y. *Furished photographs and drawings. *Greenlee Bros. and Co., Rockford, Ill. Grob Brothers, Inc.. Grafton, , Wisconsin. Carlyle Johnson Machine Co., Man- *Hanchett Mfg. Co., dester, Conn. Heller Bros. Co., Elizabeth, N. J. Grand Rapids, Mich. Products Co., Grand Rapids, Mich P. T. Hobbs Machinery, Portland, Ore.