No. 58. Part II, J. L. Webb, The Western Pine Destroying Bark Beetle.
U. S. Department of Agriculture, Bureau of Plant Industry, Bulletins:
No. 32. Herman von Schrenck, A Disease of the White Ash Caused by Polyporus Fraxinophilus, 1903.
No. 36. Hermann von Schrenck, The "Bluing" and "Red Rot" of the Western Yellow Pine, 1903.
Report of the Commissioner of Corporations on the Lumber Industry, Part I, Standing Timber, February, 1911. The latest and most reliable investigation into the amount and ownership of the forests of the United States.
Ward, H. Marshall, Timber and some of its Diseases. London: Macmillan & Co., 295 pp. An English book that needs supplementing by information on American wood diseases, such as is included in the list of government publications given herewith. The book includes a description of the character, structure, properties, varieties, and classification of timbers.
Chapter I.
THE STRUCTURE OF WOOD.
When it is remembered that the suitability of wood for a particular purpose depends most of all upon its internal structure, it is plain that the woodworker should know the essential characteristics of that structure. While his main interest in wood is as lumber, dead material to be used in woodworking, he can properly understand its structure only by knowing something of it as a live, growing organism. To facilitate this, a knowledge of its position in the plant world is helpful.
All the useful woods are to be found in the highest sub-kingdom of the plant world, the flowering plants or Phanerogamia of the botanist. These flowering plants are to be classified as follows: