The Editors of the Book of Wonders make acknowledgment herewith to the following. All mentioned have been a great assistance in making the book not only possible but authentic:

• Spencerian Pen Co.
• Eastman Kodak Co.
• American Telephone & Telegraph Co.
• Remington Arms Co.
• Bethlehem Steel Co.
• American Portland Cement Manufacturers Assn.
• Brainerd & Armstrong Silk Co.
• Corticelli Silk Co.
• Curtiss Aeroplane Co.
• U. S. Beet Sugar Industry.
• Hartford Carpet Co.
• Haynes Automobile Co.
• Jacobs & Davis, Engineers.
• Pennsylvania Railroad Co.
• Endicott, Johnson & Co.
• United Shoe Machinery Co.
• Sherwin-Williams Co.
• Pittsburgh Plate Glass Co.
• The Colliery Engineer.
• Lake Torpedo Boat Co.
• Western Union Telegraph Co.
• New York Edison Co.
• Westinghouse Lamp Co.
• Consolidated Gas, Electric Light and Power Co. of Baltimore.
• Browning Engineering Co.
• The White Star Line.
• Marconi Wireless Co.
• Plymouth Cordage Co.
• American Woolen Co.
• The Vitagraph Co.
• The B. F. Goodrich Co.
• The Goodyear Rubber and Tire Co.
• The Lexington Chocolate Co.
• The Hecker-Jones Milling Co.
• The White Oak Mills.
• The H. C. White Company.
• A. I. Root Company.
• Kohler & Campbell.
• Browne & Howell Co.
• P. & F. Corbin.
• Otis Elevator Co.
• Scientific American.
• Joseph Dixon Crucible Co.
• Homer W. Laughlin Co.
• S. D. Warren & Co.
• C. B. Cottrell & Sons Co.
• Mergenthaler Linotype Co.
• J. F. Tapley & Co.
• New Process Engraving Co.
• Mutual Film Corporation.
• Tobacco Trade Journal Co.
• McClure’s Magazine.
• James Arthur.
• Seth Thomas.
• American Locomotive Co.
• New York Central Railroad Co.
• Columbia Rope Co.
• Carl Werner.
• National Wool Growers Assn.