[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. REFERENCES[A] Moisture and Shrinkage. Roth, _For. Bull._, No. 10, pp. 25-37. Busbridge, _Sci. Am. Sup._ No. 1500. Oct. 1, '04. Weight, Strength, Cleavability, Elasticity and Toughness. Roth, _For. Bull._, 10, p. 37-50. Boulger, pp. 89-108, 129-140. Roth, _First Book_, pp. 229-233. Sargent, _Jesup Collection_, pp. 153-176. Forest Circulars Nos. 108 and 139. [Footnote A: For general bibliography, see p. 4.] CHAPTER III. THE PRINCIPAL SPECIES OF AMERICAN WOODS. NOTES. The photographs of tangential and radial sections are life size. The microphotographs are of cross-sections and are enlarged 37-1/2 diameters. Following the precedent of U. S. Forest Bulletin No. 17, Sudworth's _Check List of the Forest Trees of the United States_, the complicated rules for the capitalization of the names of species are abandoned and they are uniformly not capitalized. On pages 192-195 will be found lists of the woods described, arranged in the order of their comparative weight, strength, elasticity, and hardness. These lists are based upon the figures in Sargent's _The Jesup Collection_. In the appendix, p. 289, will be found a key for distinguishing the various kinds of wood. Information as to current wholesale prices in the principal markets of the country can be had from the U. S. Dept. of Agriculture, The Forest Service, Washington, D. C., _Record of Wholesale Prices of Lumber, List A._ These lists are published periodically. No attempt is made in this book to give prices because: (1) only lists of wholesale prices are available; (2) the cuts and grades differ considerably, especially in soft woods (conifers); (3) prices are constantly varying; (4) the prices differ much in different localities. 1 WHITE PINE, WEYMOUTH PINE. Named for Lord Weymouth, who cultivated it in England. _Pinus strobus_ Linnaeus. _Pinus_, the classical Latin name; _strobus_ refers to the cone, or strobile, from a Greek word, _strobus_, meaning twist. [Illustration: Habitat.] HABITAT: (See map); now best in Michigan, Wisconsin and Minnesota. CHARACTERISTICS OF THE TREE: Height, 100'-120', even 200'; diameter, 2'-4'; branches in whorls, cleans poorly; bark, dark gray, divided by deep longitudinal fissures into broad ridges; leaves in clusters of 5, 3"-5" long; cone drooping, 4"-10" long.