GARDNER, ROLAND: I. Mechanical tests, properties, and uses of thirty Philippine woods. II. Philippine sawmills, lumber market and prices. Bul. 4, Bu. For., P.I., 1906. (2d ed., 1907, contains tests of 34 woods.) GAYER, KARL: Forest utilization. (Vol. V, Schlich's Manual of Forestry. Translation of Die Forstbenutzung, Berlin, 1894.) London, 1908. GOLLNER, H.: Ueber die Festigkeit des Schwarzföhrenholzes. Mitt. a. d. forstl. Versuchswesen Oesterreichs. II. Bd., 3. Hft., Wien, 1881. GOTTGETREU, RUDOLPH: Physische und chemische Beschaffenheit der Baumaterialien. 3d ed., Berlin, 1880. GREEN, A.O.: Tasmanian timbers: their qualities and uses. Hobart, Tasmania, 1903, pp. 63. GREGORY, W.B.: Tests of creosoted timber. Trans. Am. Soc. C.E., Vol. LXXVI, 1913, pp. 1192-1203. See also _ibid._, Vol. LXX, p. 37. GRISARD, JULES, et VANDENBERGHE, MAXIMILIEN: Les bois industriels, indigènes et exotiques; synonymie et description des espèces, propriétés physiques des bois, qualités, défauts, usages et emplois. Paris, 189-. From Bul. de la Société nationale d'acclimatation de France, Vols. XXXVIII-XL. Hardwoods of Western Australia. Engineering, Vol. LXXXIII, Jan. 11, 1907, pp. 35-37. HATT, WILLIAM KENDRICK: A Preliminary program for the timber test work to be undertaken by the Bureau of Forestry, United States Department of Agriculture. Proc. Am. Soc. Test. Mat., Vol. III, 1903, pp. 308-343. Appendix I: Method of determining the effect of the rate of application of load on the strength of timber, pp. 325-327; App. II: A discussion on the effect of moisture on strength and stiffness of timber, together with a plan of procedure for future tests, pp. 328-334. HATT, WILLIAM KENDRICK: Relation of timber tests to forest products. Proc. Int. Assn. Test. Mat., 1906, C 2 _e_, pp. 6. ----: Structural timber. Proc. Western Ry. Club, St. Louis, Mch. 17, 1908. ----: Abstract of report on the present status of timber tests in the Forest Service, United States Department of Agriculture. Proc. Int. Assn. Test. Mat., 1909, XVL, pp. 10. ---- and TURNER, W.P.: The Purdue University impact machine. Proc. Am. Soc. Test. Mat., Vol. VI, 1906, pp. 462-475. HAUPT, HERMAN: formulæ for the strain upon timber. Center of gravity of an ungula and semi-cylinder. Jour. Franklin Inst., Vol. XIX, 3d series, 1850, pp. 408-413. HEARDING, W.H.: Report upon experiments ... upon the compressive power of pine and hemlock timber. Washington, 1872, pp. 12. HOWE, MALVERD A.: Wood in compression; bearing values for inclined cuts. Eng. News, Vol. LXVIII, 1912, pp. 190-191. HOYER, EGBERT: Lehrbuch der vergleichenden mechanischen Technologie. 1878. IHLSENG, MANGUS C.: On the modulus of elasticity of some American woods as determined by vibration. Van Nostrand's Eng. Mag., Vol. XIX, 1878, pp. 8-9. ----: On a mode of measuring the velocity of sounds in woods. Am. Jour. Sci. and Arts, Vol. XVII, 1879.