The New York State Forest Fish and Game Commission for the originals of Figs. 12, 14, 15, and 47.
T. H. McAllister of New York for the originals of Figs. 16 and 20.
The Detroit Publishing Company for the original of Fig. 6.
The B. F. Sturtevant Company, Hyde Park, Mass., for the original of Fig. 57.
Doubleday, Page & Co. for the original of Fig. 30.
Mr. Louis A. Bacon, Indianapolis. Ind., for the clamping device shown in Fig. 255.
Sargent & Company, New Haven, Conn., W. C. Toles & Company, Chicago, Ill., The Berlin Machine Works, Beloit, Wis., A. A. Loetscher, Dubuque, Iowa, and the Stanley Rule and Level Co., New Britain, Conn., for electrotypes.
Allis Chalmers Company, Milwaukee, Wis., Clark Brothers, Belmont, N. Y., The M. Garland Company, Bay City, Mich., The Prescott Company, Menominee, Mich., for illustrations of sawmilling machinery.
And most of all, I wish to acknowledge my obligation to the numerous writers of whose books and articles I have made free use, to which references are made in the appropriate places.