[Footnote 6:] See Forestry Bulletin No. 70, pp. 11, 12, and Forestry Circular No. 108.

[Footnote 7:] For table of strengths of different woods, see Sargent, Jesup Collection, pp. 166 ff.

[Footnote 8:] For table of elasticity of different woods, see Sargent, Jesup Collection, pp. 163 ff.

[Footnote 9:] For table of hardnesses of different woods, see Sargent, Jesup Collection, pp. 173 ff.

[Footnote 10:] For detailed characteristics of different woods see Chapter III.

THE PROPERTIES OF WOOD.

* For general bibliography, see [p. 4.]

Chapter III.